CN104590352A - Baby stroller - Google Patents

Abstract

The invention discloses a stroller for children, wherein the frame includes a bottom frame, a front bracket, a connecting rod and a strut assembly pivotally connected between the bottom frame and the front bracket, the bottom frame, the connecting rod, the front bracket and the strut A four-bar linkage mechanism is formed between the components, and the vehicle frame also includes a rotating bracket that can be turned back and forth on the front bracket, a front fork assembly that can be turned left and right connected to the rotating bracket, and a front fork assembly that is arranged on the rotating bracket. between the bracket and the front fork assembly is used to drive the front fork assembly to turn left and right when the rotating bracket is turned back and forth, the front wheel assembly is arranged at the bottom of the front fork assembly, and the rear wheel assembly is installed on the chassis of the rear. After the frame is folded, the front wheel assembly and the front fork assembly are gathered at the bottom of the chassis, so that the folded frame has a flat and compact structure, takes up little space, can stand on the ground, and is easy to carry and store.

Description

stroller

technical field

The invention relates to a stroller for children.

Background technique

Children's strollers in the prior art usually have a foldable frame, a wheel assembly at the bottom of the frame, and a locking mechanism for locking the frame in an unfolded position. Ground, the number of rods and the connection methods between the rods are also different, resulting in different folding and unfolding principles of each cart, and different convenience of use.

Contents of the invention

The object of the present invention is to provide a children's stroller with simple structure, convenient operation, compact structure after folding and small space occupation.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A stroller for children, comprising a vehicle frame in an expanded state and a folded state, a front wheel assembly and a rear wheel assembly arranged at the bottom of the vehicle frame, and a locking mechanism for locking the vehicle frame in the expanded state, the The vehicle frame includes an underframe extending in the front-rear direction, a front bracket extending gradually obliquely from front to rear, a connecting rod and strut assembly pivotally connected between the underframe and the front bracket, the underframe, A four-bar linkage mechanism is formed between the connecting rod, the front bracket and the strut assembly, the rear wheel assembly is installed on the rear of the chassis, and the vehicle frame also includes The rotating bracket, the front fork assembly connected to the rotating bracket in a left-right turnable manner, is arranged between the rotating bracket and the front fork assembly, and is used to drive the front fork assembly when the rotating bracket is turned back and forth. The left and right turning transmission mechanism, the front wheel assembly is arranged at the bottom of the front fork assembly, when the vehicle frame is in the unfolded state, the front wheel assembly and the rear wheel assembly are supported on the ground; when the vehicle frame is in In the folded state, the front bracket, the connecting rod, the strut assembly and the bottom frame are close to each other, the rotating bracket drives the front fork assembly and the front wheel assembly to turn backwards and the front fork assembly rotates relative to the rotating bracket So that the front fork assembly and the front wheel assembly are gathered at the bottom of the chassis.

Preferably, the transmission mechanism includes a driving gear, a driven gear arranged on the front fork assembly and engaged with the driving gear, and the driving gear is fixedly arranged relative to the front bracket or the rotating bracket, so Both the driving gear and the driven gear are bevel gears, and the axis lines of the two are arranged perpendicular to each other.

Further, the rotating bracket includes a first rod that is pivotally connected to the front bracket and extends along the left-right direction of the vehicle frame, and a second rod that is fixedly connected to the first rod and extends along the front-to-back direction of the vehicle frame. Two rods, the upper part of the front fork assembly has a fixed shaft, the second rod has a hollow rod cavity that can be rotatably penetrated by the fixed shaft, and the fixed shaft is rotatably inserted around its own axis in the hollow rod cavity of the second rod.

Furthermore, the first rod has a receiving chamber, and the front bracket is fixedly provided with a mounting rod extending along the left and right direction of the vehicle frame, and the mounting rod is passed through the receiving chamber, and the active The gear is located in the accommodating cavity and fixed on the installation rod, and the driven gear is fixed on the end of the fixed shaft and meshes with the driving gear.

As a specific implementation, the front bracket is also provided with a rotating shaft extending along the left and right direction of the vehicle frame, the installation rod and the driving gear are sleeved on the rotating shaft, and the first The rod is sleeved on the installation rod and arranged to rotate around the axis of the rotating shaft.

Preferably, the upper end of the connecting rod is fixedly connected to the rotating bracket, and the lower end of the connecting rod is pivotally connected to the front end of the chassis.

Preferably, the strut assembly is a shock-absorbing strut with a shock-absorbing spring, and the strut assembly is located behind the connecting rod.

Preferably, the underframe includes a bottom bar extending in the front-rear direction, and cross braces connected between the rear parts of the bottom bars on both sides, and the rear wheel assemblies are respectively installed at the left and right ends of the cross bar.

Further, the front bracket has front struts respectively located on the left and right sides, the rotating bracket is pivotally connected between the front struts on both sides, and the front fork assembly and the front wheel assembly are located on both sides. between the front strut and the bottom bar.

Preferably, the vehicle frame further includes a push rod assembly pivotally connected to the upper part of the front bracket, and a push rod locking member for locking the two is provided between the push rod assembly and the front bracket.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: the children's stroller of the present invention has a simple structure and a simple overall appearance, and the unfolding and folding operations of the frame are very convenient. During the process, the rotating bracket can drive the front fork assembly and the front wheel assembly to turn backwards, and at the same time, under the action of the transmission mechanism, the front fork assembly and the front wheel assembly turn to one side relative to the rotating bracket and gradually gather at the bottom of the chassis. Furthermore, the folded vehicle frame has a flat and compact structure, takes up little space, can stand on the ground after being folded, and is easy to carry and store.

Description of drawings

Accompanying drawing 1 is the side view of the children's stroller of the present invention in the unfolded state;

Accompanying drawing 2 is the top view of the children's stroller of the present invention in the unfolded state;

Accompanying drawing 3 is the schematic diagram of the working principle of the transmission mechanism on the children's stroller of the present invention;

Accompanying drawing 4 is the enlarged schematic diagram of part A in accompanying drawing 3;

Accompanying drawing 5 is a schematic diagram of the folding principle of the push rod assembly in the children's stroller of the present invention;

Accompanying drawing 6 is the side view of the children's stroller of the present invention in a half-folded state;

Accompanying drawing 7 is the side view of the stroller of the present invention in a folded state;

Accompanying drawing 8 is the side view of the stroller of the present invention standing on the ground after being folded.

Among them: 1. Underframe; 11. Bottom rod; 12. Cross brace; 2. Front bracket; 21. Front support rod;

3, connecting rod; 4, strut assembly; 5, rotating bracket; 51, first rod; 52, second rod; 53, rotating shaft; 6, front fork assembly; 61, fixed shaft; 7, transmission mechanism; 71 , driving gear; 72, driven gear; 73, installation rod; 74, fixed rod; 8, push rod assembly; 9, push rod lock; 20, front wheel assembly; 30, rear wheel assembly.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to the children's stroller shown in Figures 1 to 8, it includes a vehicle frame with an unfolded state and a folded state, a front wheel assembly 20 and a rear wheel assembly 30 located at the bottom of the frame, and a locking mechanism for locking the vehicle frame in the unfolded state. locking mechanism.

The vehicle frame includes an underframe 1 extending in the front-to-back direction, a front bracket 2 gradually tilted up from front to back, a connecting rod 3 and a strut assembly 4 pivotally connected between the underframe 1 and the front bracket 2, and the underframe 1 , connecting rod 3, front bracket 2 and strut assembly 4 constitute a four-bar linkage.

In this embodiment, the bottom frame 1 includes bottom bars 11 located on the left and right sides and cross braces 12 connected between the rear parts of the bottom bars 11 on both sides. There are two groups of rear wheel assemblies 30, which are installed on the left and right ends of the cross brace 12 respectively. The front bracket 2 is U-shaped with an opening facing upwards, and has two front struts 21 located on the left and right sides respectively. On each side of the vehicle frame, the upper end of the strut assembly 4 is pivotally connected to the front strut 21 and the lower end is pivotally connected to the bottom bar 11 on that side. In order to reduce the jolt of the stroller when the road surface is uneven and improve the comfort of the child when sitting in the stroller, the strut assembly 4 adopts a shock-absorbing strut with a shock-absorbing spring. On each side of the vehicle frame, the connecting rod 3 is arranged between the front strut 21 and the bottom rod 11 , and the connecting rod 3 is located in front of the strut assembly 4 .

The top of the front bracket 2 is also provided with a push rod assembly 8 for pushing. The push rod assembly 8 is U-shaped with its opening facing downwards, and its two ends are pivotally connected to the upper ends of the front struts 21 on both sides. The push rod assembly 8 can be unfolded or folded relative to the front bracket 2 , and a push rod locking member 9 for locking the two is also provided between the push rod assembly 8 and the front bracket 2 . By unlocking or locking the push rod lock 9 , the push rod assembly 8 can be folded or unfolded relative to the front bracket 2 .

The vehicle frame also includes a swivel bracket 5 that can be turned back and forth at the front of the front bracket 2 , a front fork assembly 6 that can be turned left and right connected to the swivel bracket 5 , and a front wheel assembly 20 is located at the bottom of the front fork assembly 6 . 2, 3, and 4, the rotating bracket 5 includes a first rod 51 extending in the left-right direction of the vehicle frame, and a second rod 52 fixedly connected to the first rod 51 and extending in the front-rear direction of the vehicle frame. Both ends of the rod 51 are respectively pivotally connected to the front struts 21 on both sides. Here, the second rod 52 is connected to the middle part of the first rod 51, and the first rod 51 and the second rod 52 are integrally arranged in a T shape. type structure. The upper part of the front fork assembly 6 is rotatably connected with the second rod 52 , so that the front fork assembly 6 can turn left and right relative to the second rod 52 . In this embodiment, the front fork assembly 6 and the front wheel assembly 20 are both in one group, which are located between the front struts 21 and the bottom rods 12 on both sides. The upper part of the front fork assembly 6 has a fixed shaft 61, and the second rod 52 has a hollow rod cavity for correspondingly inserting the fixed shaft 61 in the axial direction. In the hollow rod chamber of the rod 52, the front fork assembly 6 can drive the front wheel assembly 20 to turn left and right relative to the rotating bracket 5 when rotating.

The vehicle frame is also provided with a transmission mechanism 7 between the rotating bracket 5 and the front fork assembly 6, so as to drive the front fork assembly 6 to turn left and right relative to the rotating bracket 5 when the rotating bracket 5 turns backwards relative to the front bracket 2 . Referring to FIG. 3 and FIG. 4 , the first rod 51 has a receiving cavity, which is a hollow rod cavity extending along its length. The front bracket 2 is fixedly provided with a mounting rod 73 extending along the left and right directions of the vehicle frame, and the mounting rod 73 passes through the receiving chamber of the first rod 51 along its own length direction. The transmission mechanism 7 includes a driving gear 71 fixed on the mounting rod 73 and a driven gear 72 fixed on the upper end of the fixed shaft 61. Both the driving gear 71 and the driven gear 72 are bevel gears, and the axis lines of the two are perpendicular to each other. , and the driving gear 71 and the driven gear 72 are arranged in mesh with each other. In this way, when the front bracket 2 rotates relative to the bottom frame 1, the driving gear 71 will rotate correspondingly, and act on the driven gear 72 to drive the driven gear 72 to rotate around its own axis, so that the front fork assembly 6 and the front fork assembly 6 are connected to each other. The wheel assembly 20 turns over to one side relative to the rotating bracket 5 .

In this embodiment, one end of the installation rod 73 is fixedly connected to the front support rod 21 on one side, and a fixed rod 74 is fixedly connected to the front support rod 21 on the other side. The other end is located between the mounting rod 73 and the fixing rod 74 . The front bracket 2 is also provided with a rotating shaft 53 whose axis extends along the left and right directions of the vehicle frame. The mounting rod 73 , the driving gear 71 and the fixing rod 74 are all sleeved on the rotating shaft 53 . The first rod 51 is rotatably sleeved on the fixed rod 74 and the mounting rod 73 and can rotate around the axis of the rotating shaft 53 relative to the front bracket 2 so that the rotating bracket 5 rotates around the rotating shaft 53 relative to the front bracket 2 .

In this embodiment, on the vehicle frame, the locking mechanism is arranged between two rods of the bottom frame 1, the connecting rod 3, the front bracket 2 and the strut assembly 4 to lock the two rods, so that the bottom The four-bar linkage mechanism formed between the frame 1, the connecting rod 3, the front bracket 2 and the strut assembly 4 is locked, and then the locking of the vehicle frame is realized. In addition, on the left and right sides of the vehicle frame, the upper end of the connecting rod 3 is fixedly connected to the first rod 51 of the rotating bracket 5 to rotate relative to the front support rod 21, and the lower end of the connecting rod 3 is pivotally connected to the front end of the bottom rod 11. . In this way, in the process of unfolding or folding the vehicle frame, when the rods in the four-bar linkage mechanism composed of the bottom frame 1, the connecting rod 3, the front bracket 2 and the strut assembly 4 rotate relatively, the rotating bracket 5 is connected with each other. The overturning of the rod 3 occurs synchronously.

As shown in Figures 1 to 3, when the vehicle frame is in the unfolded state, the locking mechanism is locked, and the four-bar linkage mechanism formed between the bottom frame 1, the front bracket 2, the connecting rod 3 and the strut assembly 4 is locked, wherein the connecting rod 3 is roughly parallel to the front bracket 2 so that the vehicle frame as a whole presents a triangular structure, so that the vehicle frame has good stability when unfolded. The front wheel assembly 20 and the rear wheel assembly 30 together form a support for the vehicle frame.

When it is necessary to fold the stroller, first, as shown in Figure 5, unlock the push rod locking member 9, turn the push rod assembly 8 backward relative to the front bracket 2 and fold it with the front bracket 2, and then unlock the locking mechanism And make the four-bar linkage mechanism active. Referring to Figure 6, pressing down on the rear of the front bracket 2 causes the rear of the front bracket 2 to turn backwards, the strut assembly 4 and the connecting rod 3 are turned forward relative to the bottom frame 1, and the front bracket 2, connecting rod 3 and The strut assembly 4 gradually moves closer to the bottom frame 1 along the height direction. In the above process, the rotating bracket 5 rotates around the rotating shaft 53 and turns backward relative to the bottom frame 1, which drives the front fork assembly 6 and the front wheel assembly 20 to turn backward together; at the same time, the rotation of the front bracket 2 makes the driving gear 71 rotates around its own axis, and acts on the driven gear 72 to make the driven gear 72 rotate around its own axis, so that the front fork assembly 6 gradually turns to one side of the vehicle frame relative to the rotating bracket 5 . Finally, as shown in Figure 7, the front bracket 2, the connecting rod 3, the strut assembly 4 and the chassis 1 are close together, the front fork assembly 6 and the front wheel assembly 20 are gathered at the bottom of the chassis 1, and the front fork assembly 6 and the front The wheel assembly 20 is basically parallel to the chassis 1, and the front wheel assembly 20 is also basically parallel to the ground, so that the folded vehicle frame is in a flat structure, which greatly reduces the occupied space of the vehicle frame and avoids the The cloth cover on the stroller is soiled. After the folding is completed, the child's stroller can also be turned over 90 degrees so that the upper end of the rear wheel assembly 30 and the front bracket 2 touches the ground, so that the child's stroller can stand on the ground independently, so as to be easy to carry and store.

When the stroller needs to be opened, first turn the standing stroller over to the front wheel assembly 20, and then lift the front bracket 2, so that the relative rotation between the rods in the four-bar linkage mechanism is gradually expanded, wherein The connecting rod 3 and the strut assembly 4 are turned backward relative to the base frame 1 respectively, and the rotating bracket 5 is turned forward relative to the base frame 1, driving the front fork assembly 6 and the front wheel assembly 20 to turn forward relative to the base frame 1. At the same time, The driving gear 71 cooperates with the driven gear 72 to make the front fork assembly 6 and the front wheel assembly 20 turn outward relative to the rotating bracket 5 . Until the four-bar linkage mechanism is fully unfolded, the locking mechanism is locked, the rotating bracket 5 stops rotating, the front fork assembly 6 and the front wheel assembly 20 are reset, the front wheel assembly 20 and the rear wheel assembly 30 are jointly supported on the ground, and the vehicle frame is unfolded, and finally the The push rod assembly 8 can be unfolded relative to the front bracket 2 .

To sum up, the overall appearance of the stroller frame is simple and light in weight. When the frame is folded, the front wheel assembly 20 can participate in the folding process of the frame, so that the front wheel assembly 20 can be folded into the bottom frame 1 after the frame is folded. The bottom makes the folded vehicle frame have a flat and compact structure, takes up little space, and can stand on the ground after folding, which is easy to carry and store.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. a children trolley, comprise the vehicle frame with deployed condition and folded state, be located at front component and the wheel assembly of described bottom of frame, for described vehicle frame being locked lockout mechanism in the deployed state, it is characterized in that: described vehicle frame comprises the underframe extended along the longitudinal direction, the front frame tilting to extend gradually from front to back, be pivotally connected in the connecting rod between described underframe and described front frame and strut assembly, described underframe, connecting rod, four-bar linkage is formed between front frame and strut assembly, described wheel assembly is installed on the rear portion of described underframe, described vehicle frame also comprise can before and after be located at swinging strut on described front frame turningly, front fork assembly on described swinging strut can be connected to turningly in left and right, order about described front fork assembly when to be located between described swinging strut and described front fork assembly for overturning before and after described swinging strut and carry out the transmission device that left and right overturns, described front component is located at the bottom of described front fork assembly, when described vehicle frame is in deployed condition, described front component and wheel assembly are supported in ground, when described vehicle frame is in folded state, described front frame, connecting rod, strut assembly and underframe are drawn close mutually, and described swinging strut drives described front fork assembly to turn over front component and described front fork assembly rotates relative to described swinging strut and makes described front fork assembly and front component draw bottom in described underframe in.

2. children trolley according to claim 1, it is characterized in that: described transmission device comprises driving gear, be located at the driven gear arranged that described front fork assembly is meshed with described driving gear, the relatively described front frame of described driving gear or described swinging strut are fixedly installed, described driving gear and described driven gear are finishing bevel gear cuter, and both axial lines are vertically arranged mutually.

3. children trolley according to claim 2, it is characterized in that: described swinging strut comprises and is pivotally connected on described front frame and the first bar extended along described vehicle frame left and right directions, is fixedly connected on described first bar along the second bar that described vehicle frame fore-and-aft direction extends, the top of described front fork assembly has anchor shaft, described second bar has the hollow stem chamber that can penetrate rotationally for described anchor shaft, described anchor shaft is rotatably plugged in the hollow stem chamber of described second bar around Pivot Point Center line.

4. children trolley according to claim 3, it is characterized in that: described first bar has container cavity, described front frame is fixedly provided with the mounting rod extended along described vehicle frame left and right directions, described mounting rod is located in described container cavity, described driving gear is arranged in described container cavity and is fixedly arranged on described mounting rod, and the end that described driven gear is fixedly arranged on described anchor shaft is meshed with described driving gear.

5. children trolley according to claim 4, it is characterized in that: described front frame is also provided with the turning cylinder extended along described vehicle frame left and right directions, described mounting rod and described driving gear are set on described turning cylinder, and described first bar is set on described mounting rod and axial line around described turning cylinder is arranged rotatably.

6., according to the arbitrary described children trolley of claim 1 to 5, it is characterized in that: the upper end of described connecting rod is fixedly connected on described swinging strut, and the lower end of described connecting rod is pivotally connected in the front end of described underframe.

7. children trolley according to claim 1, is characterized in that: described strut assembly is the shock-absorbing strut with vibration damping spring, and described strut assembly is positioned at the rear of described connecting rod.

8. children trolley according to claim 1, is characterized in that: described underframe comprise extend along the longitudinal direction bottom bar, be connected to the stull between bottom bar rear portion described in both sides, the two ends, left and right of described cross bar are separately installed with described wheel assembly.

9. children trolley according to claim 8, it is characterized in that: described front frame has the front support rod laying respectively at the left and right sides, described swinging strut is pivotally connected between the described front support rod of both sides, and described front fork assembly and described front component are described in both sides between front support rod and bottom bar.

10. children trolley according to claim 1, is characterized in that: described vehicle frame also comprises the push-rod assembly being pivotally connected in described fore poppet overhead, is provided with the push-rod lock locking member for both being locked between described push-rod assembly and described front frame.