CN221068189U - Brake mechanism and cart - Google Patents

Abstract

The utility model discloses a brake mechanism and a cart, wherein the brake mechanism comprises a brake pin assembly slidably arranged on a wheel joint, an operating assembly for operation when braking or releasing the brake, and a driving assembly that drives the brake pin assembly to move when the operating assembly moves. The operating assembly comprises an operating drive member that can rotate and/or slide on the wheel joint to drive the driving assembly to move, a mechanical control assembly that drives the operating drive member to move by manual operation, and an electric control assembly that drives the operating drive member to move by electric drive. The operating assembly has an initial position and a working position. When the brake mechanism is in a braking or releasing state, the operating assembly is in the initial position. The operating assembly also comprises a mechanical control assembly and an electric control assembly. The mechanical control assembly and the electric control assembly can respectively drive the same operating drive member to move, thereby driving the driving assembly to move, and then causing the brake pin assembly to move, so that the brake mechanism brakes or releases the brake, which makes the structure of the brake mechanism simple.

Description

Brake mechanism and cart

Technical Field

The utility model specifically relates to a brake mechanism and a cart.

Background technique

Strollers play an important role in helping people carry infants and young children in their daily lives. To improve the safety of strollers, strollers are generally provided with brake mechanisms. When the stroller stops moving, the wheel assembly of the stroller needs to be braked by the brake mechanism.

The brake mechanism can be driven to brake or release by manually operating the mechanical control component, and the brake mechanism can also be driven to brake or release automatically by the electric control component. Some child strollers are equipped with both a mechanical control component and an electric control component, but the mechanical control component and the electric control component are two independent devices, which makes the structure of the brake mechanism complicated.

Utility Model Content

The utility model aims to provide a brake mechanism with a simple structure in view of the deficiencies in the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is:

A brake mechanism for braking the wheels of a cart, the cart comprising a cart frame, the cart frame comprising a wheel joint, the wheel being rotatably arranged on the wheel joint, the brake mechanism having a braking state and a brake release state, the brake mechanism comprising a brake pin assembly which can be slidably arranged on the wheel joint and can cooperate with or disengage from the wheel, an operating assembly for operation during braking or brake release, and a drive assembly which is arranged between the brake pin assembly and the operating assembly and drives the brake pin assembly to operate when the operating assembly operates, the operating assembly comprising an operating drive which can be rotatably and/or slidably arranged on the wheel joint to drive the drive assembly to operate, a mechanical control assembly which drives the operating drive to operate by manual operation, and an electric control assembly which drives the operating drive to operate by electric operation, the operating assembly having an initial position and a working position, and the operating assembly is in the initial position when the brake mechanism is in the braking state and the brake release state.

Preferably, the operating drive member is a first sliding member slidably disposed on the wheel joint.

Preferably, the operating drive member is a rocker arm, both ends of the rocker arm are rotatably and slidably arranged on the wheel joint, and the sliding directions of the two ends of the rocker arm are perpendicular to each other.

Preferably, the drive assembly comprises a second sliding member slidably arranged on the wheel joint, and the second sliding member has a braking position and a brake release position;

When the brake mechanism is in a brake-released state, the brake pin assembly is disengaged from the wheel, the second sliding member is in a brake-released position, and the operating assembly is in an initial position. When the operating assembly moves from the initial position to the working position, the second sliding member can respectively cooperate with the brake pin assembly and the operating drive member;

When the brake mechanism is in a braking state, the brake pin assembly cooperates with the wheel, the second sliding member is in a braking position, the operating assembly is in an initial position, the second sliding member is disengaged from the operating drive member and cooperates with the brake pin assembly, and when the operating drive member moves from the initial position to the working position, the operating drive member can cooperate with the second sliding member.

Furthermore, the driving assembly also includes a first elastic member that keeps the second sliding member in a released position when the brake mechanism is in a released state, one end of the first elastic member is arranged on the wheel joint, and the other end of the first elastic member is arranged on the brake pin assembly.

Further, the driving assembly further comprises a second elastic member which keeps the second sliding member in a braking position when the braking mechanism is in a braking state, and the second elastic member is swingably disposed on the wheel joint;

When the brake mechanism is in a released state, the second elastic member is in a free state;

When the brake mechanism is in a braking state, the second elastic member is elastically deformed, and the second elastic member cooperates with the second sliding member, and the direction of the elastic force of the second elastic member is opposite to the direction of the elastic force of the first elastic member.

Preferably, the cart frame also includes a handle, and the electric control component includes a motor, a connecting component for connecting the motor and the operating drive member, a first sensing device for sensing whether a human hand is holding the handle, a second sensing device for sensing whether the brake mechanism is in a braking state, and a controller, and the motor, the first sensing device and the second sensing device are electrically connected to the controller respectively.

Further, the driving assembly includes a second sliding member that can be slidably disposed on the wheel joint, the second sliding member has a braking position and a release position, the second sensing device includes a first sensing member disposed on the outside of the wheel joint and a second sensing member disposed on the second sliding member, the first sensing member is electrically connected to the controller, when the braking mechanism is in a braking state, the position of the first sensing member corresponds to the position of the second sensing member, and when the braking mechanism is in a release state, the position of the first sensing member is staggered with the position of the second sensing member.

Furthermore, the mechanical control assembly includes a first operating member that is slidably disposed on the wheel joint for stepping on, and the first operating member is abutted against and matched with the operating drive member.

Furthermore, the mechanical control component also includes a second operating member for manual operation and the connecting component connected between the second operating member and the first operating member, and the second operating member is sleeved on the motor shaft and can be rotatably arranged around the motor shaft.

Furthermore, the mechanical control component also includes a second operating member for manual operation and the connecting component connected between the second operating member and the operating drive member, and the second operating member is sleeved on the motor shaft and can be rotatably arranged around the motor shaft.

Further, the connecting assembly includes a traction rope and a traction rope fixing plate rotatably arranged on the cart frame, one end of the traction rope is arranged on the traction rope fixing plate, the other end of the traction rope is arranged on the operating drive member, the traction rope fixing plate is fixedly arranged on the motor shaft of the motor, and the traction rope fixing plate and the second operating member are relatively rotatable.

Furthermore, a fixing column is provided on one of the traction rope fixing plate and the second operating member, and a sliding groove extending along the rotation direction of the second operating member is provided on the other, and the fixing column is located in the sliding groove and can be slidably arranged along the sliding groove.

The utility model also provides a cart, which has the brake mechanism as described in any one of the above items.

Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the operating component of the brake mechanism of the utility model includes both a mechanical control component and an electric control component, and the mechanical control component and the electric control component can respectively drive the same operating drive component to move, thereby driving the drive component to move, and then the brake pin component to move, so that the brake mechanism brakes or releases the brake, which makes the structure of the brake mechanism simple.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of the brake mechanism of the present embodiment 1 in a brake-released state;

FIG2 is a schematic structural diagram of the brake mechanism of the first embodiment when switching from a brake-release state to a brake state (by stepping on the first operating member);

FIG3 is a schematic structural diagram of the brake mechanism of the first embodiment in the braking state (the first operating member and the second sliding member are both reset to the initial position);

FIG4 is a schematic structural diagram of the brake mechanism of the first embodiment in a brake-released state;

FIG5 is a schematic diagram of the structure of the brake mechanism of the present embodiment 1 when switching from the brake release state to the brake state (by manually operating the second operating member or by operating the electric control component, the first operating member remains stationary);

FIG6 is a schematic structural diagram of the brake mechanism of the first embodiment in a braking state (the second operating member or the electric control component and the second sliding member are both reset to the initial position);

FIG7 is a schematic diagram of the structure of the brake disc of the first embodiment being arranged on the wheel;

FIG8 is a schematic diagram of the structure of the driving assembly of the first embodiment when the brake is released;

FIG9 is a schematic structural diagram of the motion trajectory of the second elastic member when the driving assembly of Embodiment 1 moves from the brake-release position to the brake position;

FIG10 is a schematic diagram of the structure of the driving assembly of Embodiment 1 when in the braking position;

FIG11 is a schematic structural diagram of the motion trajectory of the second elastic member when the driving assembly of Embodiment 1 moves from the braking position to the releasing position;

FIG12 is a schematic structural diagram of the second elastic member of Embodiment 1;

FIG13 is a schematic structural diagram of the second operating member and the traction rope of the first embodiment;

FIG14 is a schematic structural diagram of the second operating member of the first embodiment;

FIG15 is a schematic structural diagram of the traction cable fixing plate of the present embodiment 1;

FIG16 is a schematic diagram of the structure of the motor of Embodiment 1;

FIG17 is a schematic diagram of the electric control assembly of the present embodiment 1;

FIG18 is a working principle diagram of the brake mechanism of the present embodiment 1;

FIG19 is a schematic diagram of the structure of the cart of Embodiment 1;

FIG20 is a schematic diagram of the structure of the first operating member and the operating drive member in cooperation with each other in Embodiment 2 (the operating assembly is in the initial position);

FIG21 is a schematic diagram of the structure of the cooperation between the first operating member and the operating drive member of the second embodiment (the operating assembly is in the working position).

Among them: 11, brake seat; 12, brake pin; 13, third elastic member; 2, brake disc; 21, brake limit hole; 31, second sliding member; 311, convex part; 311a, groove; 32, first elastic member; 33, second elastic member; 331, hook; 41, first sliding member; 411, inclined plane; 42, fourth elastic member; 43, first operating member; 44, fifth elastic member; 45, second operating member; 451, slide groove; 461, traction rope; 462, traction rope fixing plate; 462a, fixing column; 47, motor; 471, first motor shaft; 472, second motor shaft; 481, first induction member; 482, second induction member; 49, rocker arm; 600, wheel; 700, wheel joint; 800, push handle.

Detailed ways

The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

Example 1

As shown in Fig. 19, the cart of the present invention comprises a cart frame and a wheel 500 disposed on the cart frame, wherein the cart frame comprises a wheel joint 600, and the wheel 500 is rotatably disposed on the wheel joint 600. The cart further comprises a brake mechanism, which is used to brake the wheel 500 to prevent the wheel 500 from rotating relative to the wheel joint 600, thereby preventing the cart from moving.

As shown in Figures 1 to 6, the brake mechanism includes a brake pin assembly, an operating assembly and a drive assembly. The brake mechanism has a braking state and a brake-released state. When the brake mechanism is in the braking state, the brake pin assembly cooperates with the wheel 500 so that the wheel 500 cannot rotate relative to the wheel joint 600. When the brake mechanism is in the brake-released state, the brake pin assembly disengages from the wheel 500 so that the wheel 500 can rotate relative to the wheel joint 600. The drive assembly is arranged between the brake pin assembly and the operating assembly. When the brake mechanism operates the operating assembly in the brake-released state, the drive assembly can be driven to operate, and the drive assembly drives the brake pin assembly to operate, thereby causing the brake mechanism to brake. When the brake mechanism similarly operates the operating assembly in the braking state, the drive assembly can also be driven to operate, thereby causing the brake pin assembly to operate, thereby causing the brake mechanism to brake.

As shown in FIGS. 1 to 6 , the brake pin assembly includes a brake seat 11 that can be slidably disposed on the wheel joint 600 and a brake pin 12 disposed on the brake seat 11. The brake mechanism also includes a brake disc 2 disposed on the wheel 500, and a plurality of brake limit holes 21 are disposed on the brake disc 2. The plurality of brake limit holes 21 are disposed at intervals along the circumferential direction of the rotation of the wheel 500, as shown in FIG. 7 . When the brake mechanism is in a braking state, the brake pin 12 is inserted into a brake limit hole 21, thereby fixing the positions of the wheel 500 and the wheel joint 600 in the circumferential direction, so that the wheel 500 cannot rotate relative to the wheel joint 600. When the brake mechanism is in a brake-released state, the brake pin 12 is disengaged from all the brake limit holes 21, and the wheel 500 can rotate relative to the wheel joint 600.

The brake pin 12 and the brake seat 11 can be integrally arranged or fixedly connected to form an integral structure.

Preferably, the brake pin 12 can be slidably arranged on the brake seat 11, and the brake pin assembly also includes a third elastic member 13, one end of the third elastic member 13 is arranged on the brake seat 11, and the other end of the third elastic member 13 is arranged on the brake pin 12, as shown in Figures 1 to 6. In this way, when the brake pin assembly is activated to brake the brake mechanism from the brake release state, when the brake seat 11 slides into place, but the position of the brake pin 12 is staggered with the position of the brake limit hole 21, the setting of the third elastic member 13 can play a buffering role, which can avoid the rigid contact between the brake pin 12 and the brake disc 2, thereby causing the problem of failure to brake. When the wheel 200 rotates relative to the wheel joint 100 to the position where the brake pin 12 is directly opposite to the brake limit hole 21, the brake pin 12 can be inserted into the brake limit hole 21 under the action of the elastic force of the third elastic member 13, so that the brake mechanism brakes.

As shown in FIGS. 1 to 6 and 8 to 12 , the driving assembly includes a second sliding member 31 , a first elastic member 32 and a second elastic member 33 .

As shown in FIGS. 1 to 6 , the second sliding member 31 is slidably disposed on the wheel joint 600, and the second sliding member 31 slides relative to the wheel joint 600 to have a braking position and a brake-released position. When the brake mechanism is in the brake-released state, the second sliding member 31 is in the brake-released position, as shown in FIGS. 1 and 4 . When the brake mechanism is in the brake state, the second sliding member 31 is in the brake position, as shown in FIGS. 3 and 6 .

In the schematic diagram of the present embodiment, the second sliding member 31 is composed of two parts according to the requirements of assembly, etc. Of course, the second sliding member 31 can also be directly configured as one part.

As shown in FIGS. 1 to 6 , one end of the first elastic member 32 is disposed on the wheel joint 600, and the other end of the first elastic member 32 is disposed on the brake seat 11. When the brake mechanism is in the braking state, the first elastic member 32 is elastically deformed, and the elastic force of the first elastic member 32 is used to make the brake seat 11 drive the brake pin 12 to slide relative to the wheel joint 600 in a direction away from the brake limit hole 21, so that the second sliding member 31 slides synchronously in the same direction, that is, the brake mechanism automatically switches from the braking state to the brake release state, and keeps the brake mechanism in the brake release state, that is, the second sliding member 31 remains in the brake release position.

As shown in FIGS. 8 to 11 , the second elastic member 33 is swingably arranged on the wheel joint 600. When the brake mechanism is in the brake-released state, the second elastic member 33 is in a free state and does not act on the second sliding member 31, as shown in FIG. 8 . When the brake mechanism is in the brake state, the second elastic member 33 undergoes elastic deformation and cooperates with the second sliding member 31. The elastic force generated by its elastic deformation is opposite to the direction of the elastic force of the first elastic member 32, so that the second sliding member 31 is maintained in the brake position, and the brake mechanism is maintained in the brake state, as shown in FIG. 10 .

As shown in Figures 8 to 11, a protrusion 311 is provided on the second sliding member 31. When the second sliding member 31 is slid from the release position to the brake position, the protrusion 311 can abut against the second elastic member 33, so that the second elastic member 33 is elastically deformed and swings relative to the wheel joint 600. The movement trajectory of the second elastic member 33 when it is elastically deformed is shown by the dotted line in Figure 9.

As shown in Fig. 8 to Fig. 12, a hook portion 331 is provided on the second elastic member 33, and a groove 311a is provided on the convex portion 311. When the brake mechanism is in the braking state, the hook portion 331 is located in the groove 311a, and the second sliding member 31 is kept in the braking position under the joint action of the first elastic member 32 and the second elastic member 33, as shown in Fig. 10.

When the second sliding member 31 continues to slide in the previous direction, the hook 331 can escape from the groove 311a, so that the second elastic member 33 restores its elastic deformation and swings relative to the wheel joint 600. The movement trajectory of the second elastic member 33 when restoring its elastic deformation is shown by the dotted line in Figure 11.

The operating assembly has an initial position and a working position. As shown in FIGS. 1 to 6 , the operating assembly includes an operating drive member, which is rotatably and/or slidably disposed on the wheel joint 600. In this embodiment, the operating drive member is a first sliding member 41 slidably disposed on the wheel joint 600, and the sliding direction of the first sliding member 41 is perpendicular to the sliding direction of the second sliding member 31.

As shown in FIGS. 1 to 6 , the operating assembly further includes a fourth elastic member 42, one end of which is disposed on the wheel joint 600, and the other end of which is disposed on the first sliding member 41. When a force is applied to the first sliding member 41 to slide it from the initial position to the working position, the fourth elastic member 42 is elastically deformed. When the force applied to the first sliding member 41 is cancelled, the elastic force of the fourth elastic member 42 drives the first sliding member 41 to automatically slide from the working position to the initial position.

When the brake mechanism is in the brake release state, the first sliding member 41 is in the initial position under the action of the fourth elastic member 42, and the first sliding member 41 can cooperate with the second sliding member 31, as shown in Figures 1 and 4. The first sliding member 41 and the second sliding member 31 can also be disengaged, and when the first sliding member 41 slides from the initial position to the working position, it can cooperate with the second sliding member 31, thereby driving the second sliding member 31 to slide.

When the brake mechanism is in the released state, force is applied to the first sliding member 41 to drive it to slide from the initial position to the working position, which can drive the second sliding member 31 to slide from the released position to the braking position, so that the brake mechanism can be in the braking state, as shown in Figures 2 and 5.

In the braking state, when the first sliding member 41 is released, the first sliding member 41 automatically returns to the initial position, the second sliding member 31 remains in the braking position, and the first sliding member 41 is disengaged from the second sliding member 31, as shown in FIGS. 3 and 6 .

At this time, when force is applied to the first sliding member 41 again to drive it to slide from the initial position to the working position, the first sliding member 41 can cooperate with the second sliding member 31, thereby driving the second sliding member 31 to continue sliding in the previous direction, so that the brake seat 11 slides relative to the brake pin 12, so that the second sliding member 31 is disengaged from the second elastic member 33, and the elastic force of the second elastic member 33 acting on the second sliding member 31 disappears. The brake pin assembly and the second sliding member 31 can slide under the elastic force of the first elastic member 32, thereby releasing the brake mechanism and causing the second sliding member 31 to slide from the brake position to the release position.

The second sliding member 31 cooperates with the first sliding member 41 in the following manner: the first sliding member 41 is provided with an inclined surface 411 which is inclined relative to its sliding direction. When the brake mechanism is in the brake-released state, the inclined surface 411 is matched with the second sliding member 31, as shown in FIGS. 1 and 4, or the inclined surface 411 leaves the first sliding member 31. When the brake mechanism is in the brake state, the inclined surface 411 is away from the second sliding member 31, thereby disengaging from the second sliding member 31, as shown in FIGS. 3 and 6. When the first sliding member 41 slides from the initial position to the working position, the inclined surface 411 can be matched with the second sliding member 31.

The operating assembly also includes a mechanical control assembly, which cooperates with or is connected to the first sliding member 41. When the brake mechanism is in the released state, the mechanical control assembly is manually operated to drive the first sliding member 41 to slide from the initial position to the working position, thereby braking the brake mechanism. Similarly, when the brake mechanism is in the braking state, the mechanical control assembly is manually operated to drive the first sliding member 41 to slide from the initial position to the working position, thereby releasing the brake mechanism.

As shown in FIGS. 1 to 6 , the mechanical control assembly may include a first operating member 43, which is slidably disposed on the wheel joint 600, and the first operating member 43 is disposed against and matched with the first sliding member 41. When the brake mechanism is braked or released, the first operating member 43 is used for the user to step on. When the first operating member 43 is stepped on, the first operating member 43 slides relative to the wheel joint 600, thereby applying force to the first sliding member 41, so that the first sliding member 41 slides synchronously in the same direction, so that the first operating member 43 and the first sliding member 41 both slide from the initial position to the working position.

As shown in FIGS. 1 to 6 , the mechanical control assembly further includes a fifth elastic member 44, one end of which is disposed on the wheel joint 600, and the other end of which is disposed on the first operating member 43. When the first operating member 43 is stepped on to slide from the initial position to the working position, the fifth elastic member 44 is elastically deformed. When the first operating member 43 is released, the elastic force of the fifth elastic member 44 drives the first operating member 43 to automatically slide from the working position to the initial position.

As shown in FIGS. 13 to 15 , the mechanical control assembly may further include a second operating member 45 and a connecting assembly. The second operating member 45 is rotatably disposed on the cart frame. The connecting assembly connects the first sliding member 41 or the first operating member 43 and the second operating member 45, respectively. Preferably, the connecting assembly connects the first sliding member 41 and the second operating member 45, respectively. When the brake mechanism is braked or released, the second operating member 45 is used for manual operation. When the second operating member 45 is manually rotated to rotate from the initial position to the working position, the first sliding member 41 or the first operating member 43 is driven to slide relative to the wheel joint 600 from the initial position to the working position through the connecting assembly.

The connection assembly includes a traction cable 461 and a traction cable fixing plate 462 rotatably arranged on the cart frame, one end of the traction cable 461 is arranged on the traction cable fixing plate 462, and the other end of the traction cable 461 is arranged on the first sliding member 41. A fixing column 462a is arranged on one of the traction cable fixing plate 462 and the second operating member 45, and a slide groove 451 extending along the rotation direction of the second operating member 45 is arranged on the other. The fixing column 462a is located in the slide groove 451 and can slide along the length extension direction of the slide groove 451, as shown in Figures 14 and 15. When the second operating member 45 is manually rotated, the traction cable fixing plate 462 can be driven to rotate, thereby pulling the traction cable 461, and the first sliding member 41 is pulled by the traction cable 461 to slide from the initial position to the working position.

In this embodiment, when the brake mechanism is switched between the braking state and the releasing state by stepping on the first operating member 43, the traction rope fixing plate 462 can be pulled by the traction rope 461 to rotate relative to the cart frame. When the traction rope fixing plate 462 rotates, the fixing column 462a slides along the length extension direction of the slide groove 451, and the second operating member 45 remains in the initial position and does not move.

In the embodiment given in the present application, the fixing column 462a is fixedly arranged on the traction cable fixing plate 462, and the slide groove 451 is arranged on the second operating member 45. When the brake mechanism is in the braking state, the fixing column 462a is located at one end close to the initial position in the slide groove 451. In this way, when the second operating member 45 is manually rotated from the initial position to the working position, the traction cable fixing plate 462 can be rotated in the same direction at the same time.

When the second operating member 45 is manually rotated to brake or release the brake mechanism, the first operating member 43 remains at the initial position, as shown in FIGS. 4 to 6 .

The operating assembly may also include an electric control assembly, as shown in FIG16 , the electric control assembly includes a motor 47 and the above-mentioned connecting assembly, the motor shaft of the motor includes a first motor shaft 471 and a second motor shaft 472 arranged coaxially, the traction cable fixing disk 462 in the connecting assembly is fixedly arranged on the first motor shaft 471, and the second operating member 45 is sleeved on the second motor shaft 472 and can be rotatably arranged around the second motor shaft 472. When the motor 47 rotates, the traction cable fixing disk 462 can be driven to rotate, so that the first sliding member 41 is pulled by the traction cable 461 to slide from the initial position to the working position relative to the wheel joint 600, so that the brake mechanism brakes or releases the brake. In this way, the brake mechanism can be driven to brake or release the brake automatically by the electric control assembly, making the braking and release operations easier. When the brake mechanism is driven to brake or release the brake by the electric control assembly, the first operating member 43 and the second operating member 45 are both kept in the initial position. In this embodiment, the mechanical control assembly and the electric control assembly share the same connecting assembly, so that the structure of the brake mechanism is simple. Of course, in other embodiments, different connecting assemblies can also be used.

The electric control assembly further includes a first induction device, a second induction device, a power supply device and a controller, and the motor 47 is electrically connected to the controller.

The stroller frame includes a handle 700, and the handle 700 is used for a person to hold when pushing the stroller. A first sensing device is provided on the handle 700, and the first sensing device is used to sense whether a person's hand is holding the handle 700. The first sensing device is electrically connected to a controller. When a person's hand holds the handle 700, the first sensing device sends a first signal to the controller. When a person's hand leaves the handle 700, the first sensing device sends a second signal to the controller.

The second sensing device is used to sense whether the brake mechanism is in a braking state. In this embodiment, as shown in Figures 1 to 6, the second sensing device includes a first sensing member 481 disposed on the outside of the wheel joint 600 and a second sensing member 482 disposed on the second sliding member 31, and the first sensing member 481 is electrically connected to the controller. When the brake mechanism is in a braking state, the second sliding member 31 is in a braking position, and the positions of the first sensing member 481 and the second sensing member 482 correspond to each other, as shown in Figures 3 and 6, and the first sensing member 481 sends a third signal to the controller. When the brake mechanism is in a brake-released state, the second sliding member 31 is in a brake-released position, and the positions of the first sensing member 481 and the second sensing member 482 are staggered, as shown in Figures 1 and 4, and the first sensing member 481 sends a fourth signal to the controller. In this embodiment, the first sensing member 481 adopts a Hall position sensor, and the second sensing member 482 adopts a magnet.

The power supply device is electrically connected to the first induction device, the second induction device, the controller and the motor 47 respectively, so as to supply power to these components.

The working principle of the electric control assembly is shown in Figure 17, and is as follows:

When the pushcart is in use, when the hand leaves the push handle 700, the first sensing device sends a first signal to the controller, and at the same time, the second sensing device detects whether the brake mechanism is in a braking state.

When the second sensing device detects that the brake mechanism is in the braking state, the second sensing device sends a third signal to the controller. The controller receives the signals sent by the first sensing device and the second sensing device, and the controller controls the motor 47 not to start.

When the second sensing device detects that the brake mechanism is in the released state, the second sensing device sends a fourth signal to the controller. The controller receives the signals sent by the first sensing device and the second sensing device, and controls the motor 47 to start, so that the motor shaft rotates, and the motor shaft drives the traction cable fixing plate 462 to rotate, and pulls the first sliding member 41 to slide to the working position through the traction cable 461, so that the second sliding member 31 slides to the braking position, so that the brake mechanism brakes from the released state.

When a person holds the push handle 700, the first sensing device sends a second signal to the controller. At the same time, the second sensing device detects whether the brake mechanism is in a braking state.

When the second sensing device detects that the brake mechanism is in the braking state, the second sensing device sends a third signal to the controller. The controller receives the signals sent by the first sensing device and the second sensing device, and controls the motor 47 to start, so that the motor shaft rotates, and the motor shaft drives the traction cable fixing plate 462 to rotate, and the first sliding member 41 is pulled by the traction cable 461 to slide to the working position, so that the second sliding member 31 slides, thereby disengaging from the second elastic member 33, and the second sliding member 31 can slide to the brake release position, so that the brake mechanism is released from the braking state.

When the second sensing device detects that the brake mechanism is in the brake release state, the second sensing device sends a fourth signal to the controller. The controller receives the signals sent by the first sensing device and the second sensing device, and the controller controls the motor 47 not to start.

The working principle of the brake mechanism is shown in FIG18 , and is specifically as follows:

When the brake mechanism is in the released state, the second sliding member 31 is in the released position and the operating assembly is in the initial position. At this time, one end of the second sliding member 31 is abutted against the inclined surface 411 of the first sliding member 41, and the other end is abutted against the brake seat 11, as shown in Figures 1 and 4.

When the brake mechanism brakes from the released state, when the brake mechanism brakes by operating the first operating member 41, the first operating member 41 is stepped on to slide it toward the working position relative to the wheel joint 600, driving the first sliding member 41 to slide toward the working position synchronously, so that the second sliding member 31 slides toward the braking position relative to the wheel joint 600. During this process, the protrusion 311 abuts against the second elastic member 33, so that the second elastic member 33 is elastically deformed and swings relative to the wheel joint 600, and at the same time, the brake pin assembly as a whole slides in a direction close to the brake limit hole 21. When the position of the brake pin 12 is opposite to the position of the brake limit hole 21, the brake pin 12 can be inserted into the brake limit hole 21, so that the brake mechanism is in the braking state, as shown in Figure 2.

After the first operating member 41 is released, the elastic force of the fourth elastic member 42 drives the first sliding member 41 to automatically slide from the working position to the initial position, and the elastic force of the fifth elastic member 44 drives the first operating member 43 to automatically slide from the working position to the initial position, so that the second sliding member 31 is away from the inclined surface 411 of the first sliding member 41. At this time, since the second sliding member 31 slides to the braking position relative to the wheel joint 600, the hook portion 331 of the second elastic member 33 is clamped in the groove 311a of the protrusion 331, so that the second sliding member 31 is kept in the braking position under the joint action of the first elastic member 32 and the second elastic member 33, so that the brake mechanism is kept in the braking state, as shown in FIG3.

When the brake mechanism is released from the braking state, when the brake mechanism is released by operating the first operating member 41, the first operating member 41 is stepped on to slide it toward the working position relative to the wheel joint 600, driving the first sliding member 41 to slide toward the working position synchronously, so that the second sliding member 31 continues to slide in the previous direction relative to the wheel joint 600. During this process, the brake seat 11 slides relative to the brake pin 12 to cause the third elastic member 13 to be elastically deformed, and the hook portion 331 of the second elastic member 33 gradually disengages from the groove 311a, and the second elastic member 33 gradually recovers its elastic deformation, thereby not acting on the second sliding member 31.

After the first operating member 41 is released, the elastic force of the fourth elastic member 42 drives the first sliding member 41 to automatically slide from the working position to the initial position, and the elastic force of the fifth elastic member 44 drives the first operating member 43 to automatically slide from the working position to the initial position. The first elastic member 32 recovers its elastic deformation, so that the brake pin assembly slides in the direction of escaping from the brake limit hole 21, and the second sliding member 31 slides to the brake release position until the brake mechanism is in the brake release state.

When the brake mechanism switches between the braking state and the releasing state, it can also be achieved by manually rotating the second operating member 45. The second operating member 45 is manually rotated from the initial position to the working position, driving the traction rope fixing plate 462 to rotate synchronously, and the first sliding member 41 is pulled by the traction rope 461 to slide from the initial position to the working position, thereby driving the second sliding member 31 to slide, so that the brake mechanism brakes or releases the brake.

When the first sensing device, the second sensing device, the controller and the motor 47 are all powered, the brake mechanism can also be driven by the electric control component to brake or release the brake mechanism.

When the brake mechanism is braked by one of the three methods, namely, stepping on the first operating member 41, manually rotating the second operating member 45, and starting the motor 47, the brake mechanism can be released by any of the other two methods; conversely, when the brake mechanism is braked by one of the above three methods, the brake mechanism can be released by any of the other two methods.

Example 2

In this embodiment, the structure of the operating drive member is different from that of the embodiment 1, and the rest is the same as that of the embodiment 1. As shown in Figures 20 and 21, the operating drive member is a swing rod 49, and both ends of the swing rod 49 are rotatably and slidably arranged on the wheel joint 600, and the sliding directions of the two ends of the swing rod 49 are perpendicular to each other.

One end of the swing rod 49 can be abutted against the second sliding member 31, and the first operating member 43 abuts against the other end of the swing rod 49. In this embodiment, the traction rope 461 can be connected to the swing rod 49.

When the operating assembly is converted from the initial position to the working position, the two ends of the rocker arm 49 rotate and slide relative to the wheel joint 600 respectively, thereby abutting against and cooperating with the second sliding member 31 to push the second sliding member 31 to slide relative to the wheel joint 600.

The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims (14)

1. A brake mechanism, characterized in that it is used to brake the wheels of a cart, the cart comprises a cart frame, the cart frame comprises a wheel joint, the wheel can be rotatably arranged on the wheel joint, the brake mechanism has a braking state and a brake release state, the brake mechanism comprises a brake pin assembly that can be slidably arranged on the wheel joint and can cooperate or disengage with the wheel, an operating assembly for operation during braking or brake release, and a drive assembly arranged between the brake pin assembly and the operating assembly to drive the brake pin assembly to operate when the operating assembly is operated, the operating assembly comprises an operating drive member that can be rotatably and/or slidably arranged on the wheel joint to drive the drive member to operate, a mechanical control assembly that drives the operating drive member to operate through manual operation, and an electric control assembly that drives the operating drive member to operate through electric operation, the operating assembly has an initial position and a working position, and when the brake mechanism is in the braking state and the brake release state, the operating assembly is in the initial position. 2 . The brake mechanism according to claim 1 , wherein the operating drive member is a first sliding member slidably disposed on the wheel joint. 3 . 3. The brake mechanism according to claim 1 is characterized in that: the operating drive member is a rocker arm, both ends of the rocker arm are rotatably and slidably arranged on the wheel joint, and the sliding directions of the two ends of the rocker arm are perpendicular to each other. 4. The brake mechanism according to claim 1, characterized in that: the drive assembly comprises a second sliding member slidably disposed on the wheel joint, the second sliding member having a braking position and a brake release position; When the brake mechanism is in a brake-released state, the brake pin assembly is disengaged from the wheel, the second sliding member is in a brake-released position, and the operating assembly is in an initial position. When the operating assembly moves from the initial position to the working position, the second sliding member can respectively cooperate with the brake pin assembly and the operating drive member; When the brake mechanism is in a braking state, the brake pin assembly cooperates with the wheel, the second sliding member is in a braking position, the operating assembly is in an initial position, the second sliding member is disengaged from the operating drive member and cooperates with the brake pin assembly, and when the operating drive member moves from the initial position to the working position, the operating drive member can cooperate with the second sliding member. 5. The brake mechanism according to claim 4 is characterized in that: the drive assembly also includes a first elastic member that keeps the second sliding member in a released position when the brake mechanism is in a released state, one end of the first elastic member is arranged on the wheel joint, and the other end of the first elastic member is arranged on the brake pin assembly. 6. The brake mechanism according to claim 5, characterized in that: the drive assembly further comprises a second elastic member for keeping the second sliding member in a braking position when the brake mechanism is in a braking state, and the second elastic member is swingably disposed on the wheel joint; When the brake mechanism is in a released state, the second elastic member is in a free state; When the brake mechanism is in a braking state, the second elastic member is elastically deformed, and the second elastic member cooperates with the second sliding member, and the direction of the elastic force of the second elastic member is opposite to the direction of the elastic force of the first elastic member. 7. The brake mechanism according to claim 1 is characterized in that: the cart frame also includes a push handle, the electric control component includes a motor, a connecting component for connecting the motor and the operating drive member, a first sensing device for sensing whether a human hand is holding the push handle, a second sensing device for sensing whether the brake mechanism is in a braking state, and a controller, and the motor, the first sensing device and the second sensing device are electrically connected to the controller respectively. 8. The brake mechanism according to claim 7 is characterized in that: the drive assembly includes a second sliding member that can be slidably arranged on the wheel joint, the second sliding member has a braking position and a release position, the second sensing device includes a first sensing member arranged on the outside of the wheel joint and a second sensing member arranged on the second sliding member, the first sensing member is electrically connected to the controller, when the brake mechanism is in a braking state, the position of the first sensing member corresponds to the position of the second sensing member, and when the brake mechanism is in a release state, the position of the first sensing member is staggered with the position of the second sensing member. 9. The brake mechanism according to claim 7, characterized in that the mechanical control assembly comprises a first operating member slidably disposed on the wheel joint for stepping on, and the first operating member is abutted against and matched with the operating drive member. 10. The brake mechanism according to claim 9 is characterized in that: the mechanical control component also includes a second operating member for manual operation and the connecting component connected between the second operating member and the first operating member, and the second operating member is sleeved on the motor shaft and can be rotatably arranged around the motor shaft. 11. The brake mechanism according to claim 7 is characterized in that: the mechanical control component also includes a second operating member for manual operation and the connecting component connected between the second operating member and the operating drive member, and the second operating member is sleeved on the motor shaft and can be rotatably arranged around the motor shaft. 12. The brake mechanism according to claim 10 or 11 is characterized in that: the connecting assembly includes a traction rope and a traction rope fixing plate rotatably arranged on the cart frame, one end of the traction rope is arranged on the traction rope fixing plate, and the other end of the traction rope is arranged on the operating drive member, the traction rope fixing plate is fixedly arranged on the motor shaft of the motor, and the traction rope fixing plate and the second operating member are relatively rotatable. 13. The brake mechanism according to claim 12 is characterized in that a fixing column is provided on one of the traction rope fixing plate and the second operating member, and a sliding groove extending along the rotation direction of the second operating member is provided on the other, and the fixing column is located in the sliding groove and can be slidably arranged along the sliding groove. 14. A cart, characterized by having a brake mechanism as claimed in any one of claims 1 to 13.