CN205459532U - Elevating gear of machine of shifting and machine of shifting - Google Patents

Abstract

The utility model discloses a lifting device of a shifting machine and a shifting machine, which solves the technical problems of a small transmission ratio range and a large volume of the existing lifting device of a shifting machine. The utility model discloses a lifting device of a shifting machine The lifting device includes a motor with an output shaft, a power supply electrically connected to the motor, a first transmission part connected to one end of the output shaft of the motor, a brake connected to the other end of the output shaft of the motor, and a 90° angle to the first transmission part. The second transmission part of the transmission, the first transmission gear linked with the second transmission part, the second transmission gear meshed with the first transmission gear, the reel fixedly connected with the second transmission gear and the lifting belt wound on the reel. The number of teeth of the first transmission gear is smaller than the number of teeth of the second transmission gear, and the rotation center axis of the second transmission gear coincides with the axis center of the reel.

Description

A lifting device for a shifting machine and a shifting machine

technical field

The utility model relates to a shifting machine.

Background technique

Lifts are used to move people with reduced mobility from one location to another, making nursing work more convenient, efficient, safe and comfortable.

The lifting device in the shifting machine in the prior art generally uses the output shaft of the motor to transmit torque through a single-stage reducer to realize the lifting function of the shifting machine. Since such a lifting device is a single-stage reduction, it has a transmission ratio range Disadvantages of small size and large size.

Utility model content

The technical problem to be solved by the utility model is to provide a lifting device and a lifting device of a shifting machine, so as to solve the technical problems of a small transmission ratio range and a large volume of the existing lifting device of a shifting machine.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A lifting device for a shifter, comprising a motor with an output shaft, a power supply electrically connected to the motor, a first transmission part connected to one end of the output shaft of the motor, a brake connected to the other end of the output shaft of the motor, and The second transmission part of the 90° transmission of the first transmission part, the first transmission gear linked with the second transmission part, the second transmission gear meshed with the first transmission gear, the reel fixedly connected with the second transmission gear and the reel wound on the reel The number of teeth of the first transmission gear is smaller than the number of teeth of the second transmission gear, and the rotation center axis of the second transmission gear coincides with the axis of the reel.

Further, the first transmission part is a worm, and the second transmission part is a worm gear, or both the first transmission part and the second transmission part are 45° helical gears, or the first transmission part and the The second transmission parts are all bevel gears.

Further, the lifting device also includes a limit mechanism, the limit mechanism includes an upper limit switch and a lower limit switch for controlling the connection between the motor and the power circuit, and a pressing plate and a trigger lower limit switch for triggering the upper limit switch The lower end of the lifting belt is provided with at least two hooks, the pressing plate is provided with a first through hole, the lifting belt passes through the first through hole and the hook is arranged directly below the pressing plate, so The pressing rod is arranged between the lifting belt and the reel, and one end of the pressing rod is close to the surface of the lifting belt facing the reel.

Further, the pressure rod has elasticity, the lower limit switch has a casing, one end of the pressure rod is fixed on the casing, and the other end of the pressure rod is rotatably connected with a roller, and the axial surface of the roller is close to the lifting belt. surface.

Further, the motor and the second transmission gear are arranged on the same side of the second transmission part and the first transmission gear, and the reel, lifting belt and limit mechanism are all arranged between the motor and the second transmission gear.

Further, the reel is coaxially provided with two guide plates, the lifting belt is wound on the reel axial surface between the two guide plates, and a groove is provided on the reel axial surface between the two guide plates, and the concave A fixed rod is arranged in the groove, one end of the fixed rod is fixed on a guide plate, the other end of the fixed rod is fixed on another guide plate, and the lifting belt is clamped between the fixed rod and the bottom surface of the groove.

Further, the lifting device also includes a Hall sensor for detecting the rotational speed of the output shaft of the motor, the Hall sensor is provided with a rotational speed threshold, the brake is a power-off brake, and the Hall sensor detects When the speed is greater than the speed threshold, a signal is sent to the brake to reduce the voltage of the brake to increase the braking force of the brake.

Further, the second transmission gear includes a metal internal gear and an injection-molded plastic external gear, the metal internal gear has metal external teeth, the plastic external gear is concentrically provided with an inner hole, and the plastic external gear has a plastic external gear Plastic inner teeth are set on the inner hole circumference, the reel is fixed on the metal inner gear, the metal outer teeth of the metal inner gear mesh with the plastic inner teeth of the plastic outer gear, and the plastic outer gear The plastic outer teeth are engaged with the first transmission gear for transmission.

Further, a torsion spring is provided on the output shaft of the motor and/or on the coupling.

The utility model also discloses a shifting machine, which includes the lifting device described in any one of the above technical solutions.

The beneficial effects of the utility model are:

1. The output shaft of the motor is driven by the first transmission part and the second transmission part to realize the first stage of deceleration, and then through the transmission of the first transmission gear and the second transmission gear to realize the second stage of deceleration, and finally drives the reel to rotate to control the lifting of the lifting belt Therefore, the two-stage deceleration adopted by the lifting device of the present invention can have a larger transmission ratio range, and compared with the single-stage deceleration, the volume of the lifting device can also be reduced;

2. The 90° transmission between the first transmission part and the second transmission part reduces the size of the lifting device and further reduces the volume of the lifting device;

3. By setting the brake on the output shaft of the motor, it is possible to conveniently control the start, stop and speed of the lifting belt lifting, and prevent the motor speed from being too high to cause the lifting belt lifting speed to be too fast, thereby improving the safety of the lifting device.

The specific technical effects of the utility model will be further described in the specific implementation.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described:

Fig. 1 is the upper view of the utility model;

Fig. 2 is the sectional view of A-A direction in Fig. 1;

Fig. 3 is a three-dimensional structure schematic diagram of a viewing angle after the utility model is installed with a torsion spring;

Fig. 4 is a three-dimensional structure schematic diagram of another viewing angle after the utility model is installed with a torsion spring;

Fig. 5 is the upper view of the utility model after installing the torsion spring.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.

Embodiment one:

As shown in Figure 1, a lifting device of a shifting machine includes a casing not shown in the figure, a motor 1 with an output shaft 11, a power supply 12 electrically connected to the motor 1, and a motor 1 are installed in the casing. The first transmission part 21 connected to one end of the output shaft 11 of the motor 1, the brake 13 connected to the other end of the output shaft 11 of the motor 1, the second transmission part 22 meshed with the first transmission part 21, and the second transmission part 22 linkage The first transmission gear 31, the second transmission gear 32 meshed with the first transmission gear 31, the reel 4 fixedly connected with the second transmission gear 32, the lifting belt 5 wound on the reel 4 and the output shaft 11 of the detection motor 1 The Hall sensor of the rotating speed, the lifting belt 5 adopts a relatively strong and tough cloth belt or a flexible belt body of other materials, and the motor 1 adopts a double-head motor, and the distance between the first transmission part 21 and the second transmission part 22 is 90 ° transmission means that the angle between the transmission direction of the first transmission part 21 and the second transmission part 22 is 90 °, the first transmission part 21 is preferably a worm, the second transmission part 22 is preferably a worm wheel, and the worm and worm gear drive have self-locking characteristics , the safety of the lifting device can be improved, and the torque of the output shaft 11 can also be increased. The first transmission part 21 and the second transmission part 22 can both adopt 45° helical gears or bevel gears, as long as the first The transmission mode in which the transmission part 21 and the second transmission part 22 realize 90° transmission to drive the rotation of the second transmission part 22 belongs to the protection scope of the present invention, and the first transmission part 21 and the second transmission part 22 are arranged in the housing 2 to realize Dust-proof effect, the number of teeth of the first transmission gear 31 is smaller than the number of teeth of the second transmission gear 32, the second transmission part 22 has a connecting shaft 22a, the first transmission gear 31 has a gear shaft 31a, and the connecting shaft 22a and the gear shaft 31a are connected through a coupling The coupling 22b is fixedly connected, and it is a relatively simple and reliable way to use the coupling 22b to make the second transmission part 22 and the first transmission gear 31 linked. Of course, the second transmission part 22 and the first transmission gear 31 can also adopt other connections. Linkage is realized by way or transmission mode, the rotation central axis of the second transmission gear 32 coincides with the axis center of the reel 4, the first transmission part 21 is made of metal material, and the second transmission part 22 is made of non-metallic material, so The noise during the transmission process of the first transmission part 21 and the second transmission part 22 can be reduced. The output shaft 11 of the motor 1 realizes the first stage of deceleration through the first transmission part 21 and the second transmission part 22. The second transmission part 22 The first transmission gear 31 is driven to rotate synchronously through the connecting shaft 22a, the coupling 22b and the gear shaft 31a, and then the meshing transmission of the first transmission gear 31 and the second transmission gear 32 realizes the second stage of deceleration, so that the reel 4 rotates at a low speed to drive Lifting belt 5 lifts, and lifting device can have larger transmission ratio scope through above-mentioned two-stage reduction, and volume also can be further reduced.

The Hall sensor is arranged inside or outside the motor 1. The Hall sensor is provided with a rotational speed threshold. When the Hall sensor detects that the rotational speed of the output shaft 11 of the motor 1 is greater than the rotational speed threshold, it sends a signal to the brake 13 to trigger the brake 13 to generate a force applied to the motor. The braking force on the output shaft 11 of 1, in order to improve the safety of the lifting device, the brake 13 adopts a de-energized brake. The working principle of the de-energized brake is that the smaller the voltage, the greater the braking force. The voltage of 13 is zero. At this time, the braking force of the brake 13 reaches the maximum so that the output shaft 11 of the motor 1 stops rotating in a short time. The brake 13 is integrated with a transformer module, and the power supply voltage is connected to the input of the transformer module. end, the power leads of the brake 13 are connected to the output end of the transformer module, and when the Hall sensor detects that the speed of the output shaft 11 of the motor 1 is greater than the speed threshold, a signal is sent to the transformer module in the brake 13 to reduce the input voltage of the brake 13 By increasing the braking force of the brake 13, the output shaft 11 of the motor 1 is controlled to decelerate to a reasonable speed range, so as to improve the safety of the lifting device.

As shown in Figures 1 to 4, the lifting of the lifting device is manually controlled by the button that controls the forward and reverse of the motor 1. In order to avoid excessive lifting or lowering of the lifting device due to human error, the lifting device also includes a limit mechanism 6, the limit The mechanism 6 includes an upper limit switch 61 and a lower limit switch 62 for controlling the on-off of the motor 1 and the power supply 12, and a pressing plate 61a for triggering the upper limit switch 61 and a pressing rod 62a for triggering the lower limit switch 62. The lower end is provided with at least two hooks 51. Since the hooks 51 are directly fixed on the lifting belt 5, it is easy to cause the lifting belt 5 to tear. 61a is provided with a first through hole 61b, the top of the first through hole 61b is provided with a guide wheel 5a, the lifting belt 5 is pressed against the guide wheel 5a and then passed through the first through hole 61b after being guided by the guide wheel 5a, the hook 51 Located directly below the pressing plate 61a, the pressing rod 62a is arranged between the lifting belt 5 and the reel 4 and one end of the pressing rod 62a is close to the surface of the lifting belt 5 facing the reel 4 .

The control process of upper limit switch 61 and lower limit switch 62 is:

The lifting belt 5 moves upwards to drive the hook 51 to go up until the hook 51 touches the lower surface of the pressing plate 61a, and then drives the pressing plate 61a to move upwards to trigger the upper limit switch 61. The upper limit switch 61 controls the disconnection of the circuit between the motor 1 and the power supply 12. At this time, the lifting The device reaches the maximum lifting height;

The lifting belt 5 moves downward to the reel 4 to wind the lifting belt 5 in the direction opposite to the winding direction when the lifting belt 5 moves upward, and the lifting belt 5 moves in the direction of the pressing bar, driving the pressing bar 62a to move downward to trigger the lower limit switch 62 , the lower limit switch 62 controls the disconnection of the circuit between the motor 1 and the power supply 12, and at this moment, the lifting device reaches the minimum lifting height.

The upper limit switch 61, the lower limit switch 62, the pressure plate 61a and the pressure rod 62a can be arranged on the inner wall of the casing, but in order to facilitate the assembly of the limit mechanism 6, preferably, the limit mechanism 6 also includes a support plate 63, the upper limit The position switch 61 and the lower limit switch 62 are all located on the support plate 63. Since the installation height of the lower limit switch 62 has certain requirements, in order to facilitate the adjustment of the installation height of the lower limit switch 62, the support plate 63 is provided with a support block 63a, and the lower limit switch Switch 62 is installed on the supporting block 63a, and pressing plate 61a is located between supporting plate 63 and upper limit switch 61, and one end of pressing plate 61a is connected on the supporting plate 63 in rotation, and pressing plate 61a is promoted by hook 51 and triggers upper limit switch 61, and lifting belt 5 After moving downward again, the pressure plate 61a automatically falls to the upper surface of the support plate 63 by gravity without an additional reset mechanism, and the upper limit switch 61, the lower limit switch 62, the pressure plate 61a and the pressure rod 62a are moved by the support plate 63 Integrated together, when the limit mechanism 6 is installed, only the support plate 63 needs to be fixed on the casing, which simplifies the installation process of the limit mechanism 6 . Since the pressing plate 61a is lifted by at least two hooks 51, the other end of the pressing plate 61a is provided with a downwardly bent protrusion 61c, and the hook 51 is arranged directly below the protrusion 61c. 61a can trigger the upper limit switch 61 in advance to prevent the components hooked under the lifting belt from touching the support plate 63 and interfering.

Depression bar 62a has elasticity, and lower limit switch 62 has casing, and one end of depression bar 62a is fixed on the casing, and the other end of depression bar 62a is connected with roller 62b in rotation, and the axial surface of this roller 62b is close to the surface of lifting belt 5, by The end portion of depression bar 62a is provided with roller 62b, can reduce the frictional force when depression bar 62a contacts with lifting belt 5, prevents the end portion of depression bar 62a from scratching lifting belt 5, because depression bar 62a has elasticity, in lifting belt 5 direction Move down to the reel 4 to wind the lifting belt 5 in the direction opposite to the winding direction when the lifting belt 5 moves upward. After the pressing rod 62a touches the lifting belt 5, the downward movement triggers the lower limit switch 62 and produces elastic bending. After moving upwards, the pressing rod 62a can reset automatically without additional reset mechanism.

In order to further reduce the volume of the upgrading device, the motor 1 and the second transmission gear 32 are arranged on the same side of the second transmission part 22 and the first transmission gear 31, so that an accommodation space is formed between the motor 1 and the second transmission gear 32 , the reel 4, the lifting belt 5 and the limit mechanism 6 are all arranged in the accommodation space between the motor 1 and the second transmission gear 32. Such an installation arrangement structure improves the space utilization rate of the lifting device, making the structure of the lifting device more efficient. compact.

The reel 4 is coaxially provided with two guide plates 4a, and the lifting belt 5 is wound on the axial surface of the reel 4 between the two guide plates 4a. The two guide plates 4a play a limiting role on the lifting belt 5. A groove 41 is provided on the shaft surface of the reel, and a fixed rod 42 is arranged in the groove 41. One end of the fixed rod 42 is fixed on a guide plate 4a, and the other end of the fixed rod 42 is fixed on another guide plate 4a. The fixed rod 42 The lifting belt 5 is clamped with the bottom surface of the groove 41, and the lifting belt 5 is fixed on the reel 4 through the fixing rod 42, so that the reel 4 can wind the lifting belt 5 in two directions, and the fixing rod 42 is stored in the groove 41 , so there will be no interference with the winding process of the lifting belt 5 .

As shown in Figure 3, the second transmission gear 32 includes a metal internal gear 321 and an injection-molded plastic external gear 322, the metal internal gear 321 has metal external teeth 321a, the plastic external gear 322 is concentrically provided with an inner hole, and the plastic external gear 322 has Plastic outer teeth 322a and plastic inner teeth 322b are arranged on the circumferential surface of the inner hole, the reel 4 is fixed on the metal inner gear 321, and the metal outer teeth 321a of the metal inner gear 321 and the plastic inner teeth 322b of the plastic outer gear 322 are meshed and assembled , the plastic outer teeth 322a of the plastic outer gear 322 are meshed with the first transmission gear 31 for transmission, and by setting the second transmission gear 32 as a metal inner gear 321 and a plastic outer gear 322, the first transmission gear 32 and the second transmission gear 32 can be further reduced. Noise when transmission gear 32 engages transmission.

As shown in Figures 3 to 5, at least one place on the output shaft 11 of the motor 1 and the shaft coupling 22b is provided with a torsion spring 14. It plays a speed-limiting role during the descent process, and when the second transmission part of the lifting device, the first transmission part and the brake 13 fail at the same time, the torsional force of the torsion spring 14 can realize the self-locking of the lifting device;

The concrete installation method of torsion spring 14 has:

As shown in Figure 3, a coaxial columnar portion is provided on the shaft coupling 22b, the torsion spring 14 is sleeved on the columnar portion, one end of the torsion spring 14 is fixed on the columnar portion, and the other end of the torsion spring 14 is fixed on the turbine 22 on the outer casing 2 or on the casing of the lifting device;

As shown in Figure 4, the output shaft 11 of the motor 1 protrudes from the brake 13, and the part of the output shaft 11 protruding from the brake 13 is provided with a columnar part coaxially arranged with the output shaft 11, and the torsion spring 14 is sleeved on the columnar part. The brake 13 is provided with an outer cover 13a, and the torsion spring 14, the columnar part and the part of the output shaft 11 that extends out of the brake 13 are accommodated in the cavity formed by the brake 13 and the outer cover 13a, and one end of the torsion spring 14 is fixed on the column. On the part, the other end of the torsion spring 14 is fixed on the outer cover 13a;

As shown in Figure 5, the output shaft 11 section between the motor 1 and the brake 13 is provided with a columnar part coaxial with the output shaft 11, the torsion spring 14 is sleeved on the columnar part, and one end of the torsion spring 14 is fixed on the On the cylindrical part, the other end of the torsion spring 14 is fixed to the motor 1 or to the brake 13 .

Embodiment two:

As shown in Figures 1 to 5, a moving machine includes the lifting device described in Embodiment 1.

The above has described the preferred embodiments of the utility model, but it should not be understood as a limitation on the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to change. Those skilled in the art can make various changes and deformations according to the utility model. As long as they do not depart from the spirit of the utility model, they all belong to the rights attached to the utility model. The scope defined by the requirement.

Claims (10)

1. A lifting device for a shifter, characterized in that it comprises a motor with an output shaft, a power supply electrically connected to the motor, a first transmission part connected to one end of the output shaft of the motor, and another end of the output shaft of the motor Brake connected at one end, second transmission part with 90° transmission with the first transmission part, first transmission gear linked with the second transmission part, second transmission gear meshed with the first transmission gear, fixedly connected with the second transmission gear The reel and the lifting belt wound on the reel, the number of teeth of the first transmission gear is smaller than the number of teeth of the second transmission gear, and the rotation center axis of the second transmission gear coincides with the axis of the reel. 2. The lifting device of a moving machine according to claim 1, wherein the first transmission part is a worm, and the second transmission part is a worm wheel, or the first transmission part and the second transmission part are The two transmission parts are both 45° helical gears, or both the first transmission part and the second transmission part are bevel gears. 3. The lifting device of a moving machine according to claim 2, characterized in that the lifting device further includes a limit mechanism, and the limit mechanism includes an upper limit for controlling the connection between the motor and the power circuit switch and lower limit switch, as well as a pressing plate for triggering the upper limit switch and a pressing rod for triggering the lower limit switch, at least two hooks are provided at the lower end of the lifting belt, a first through hole is provided on the pressing plate, and The belt passes through the first through hole and the hook is arranged directly below the pressing plate, the pressing rod is arranged between the lifting belt and the reel, and one end of the pressing rod is close to the surface of the lifting belt facing the reel. 4. The lifting device of a moving machine according to claim 3, wherein the pressing rod has elasticity, the lower limit switch has a housing, and one end of the pressing rod is fixed on the housing, and the pressing rod is fixed on the housing. The other end of the depression bar is rotatably connected with a roller whose axial surface is close to the surface of the lifting belt. 5. The lifting device of a moving machine according to claim 2, wherein the motor and the second transmission gear are arranged on the same side of the second transmission part and the first transmission gear, and the reel, lifting Both the belt and the limiting mechanism are arranged between the motor and the second transmission gear. 6. The lifting device of a moving machine according to claim 1, wherein two guide plates are coaxially arranged on the reel, and the lifting belt is wound on the axial surface of the reel between the two guide plates , there is a groove on the shaft surface of the reel between the two guide plates, a fixed rod is arranged in the groove, one end of the fixed rod is fixed on one guide plate, the other end of the fixed rod is fixed on the other guide plate, and the fixed rod Grip the lifting straps with the bottom surface of the groove. 7. The lifting device of a moving machine according to claim 1, wherein the lifting device further comprises a Hall sensor for detecting the rotational speed of the output shaft of the motor, and the Hall sensor is provided with a rotational speed threshold, so The brake is a power-off brake, and when the Hall sensor detects that the speed of the output shaft of the motor is greater than the speed threshold, it sends a signal to the brake to reduce the voltage of the brake to increase the braking force of the brake. 8. The lifting device of a moving machine according to claim 1, wherein the second transmission gear comprises a metal inner gear and an injection-molded plastic outer gear, the metal inner gear has metal outer teeth, The plastic outer gear is concentrically provided with an inner hole, the plastic outer gear has plastic outer teeth and plastic inner teeth are arranged on the circumferential surface of the inner hole, the reel is fixed on the metal inner gear, and the metal inner gear The metal outer teeth are meshed with the plastic inner teeth of the plastic outer gear, and the plastic outer teeth of the plastic outer gear are meshed with the first transmission gear for transmission. 9 . The lifting device of a moving machine according to claim 1 , wherein a torsion spring is provided on the output shaft of the motor and/or on the coupling. 10. A moving machine, characterized by comprising the lifting device according to any one of claims 1-9.