Differential speed reduction motor for rear axle of wheelchair

Abstract

The utility model discloses a wheelchair rear axle differential speed reduction motor, which comprises a differential speed reduction motor body, heat dissipation fins are arranged on the side surface of the differential speed reduction motor body, the output end of the differential speed reduction motor body is fixedly connected with an output shaft, the side surface of the output shaft is fixedly connected with a heat dissipation fan, and the heat dissipation fan is fixedly connected with a power supply. And vertical plates are symmetrically arranged on the side surface of the differential speed reduction motor body. The differential speed reduction motor body is installed on a wheelchair for use, the rotating speed of the wheels on the two sides can be automatically adjusted, the rotating speed of the wheels on the inner side is reduced, and the rotating speed of the wheels on the outer side is increased, so that the differential speed function is achieved, friction between tires and the ground is reduced, and turning flexibility and smoothness are improved; the differential speed reduction motor body can drive the heat dissipation fan to rotate to generate air flow while driving the tire to rotate, air flowing is accelerated, heat dissipation is conducted on the differential speed reduction motor body, and the heat dissipation effect is further improved in cooperation with the wound cooling pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a differential reduction motor for the rear axle of a wheelchair. Background Art

[0002] As an important auxiliary tool for people with mobility difficulties, the performance of a wheelchair directly affects the user's experience and quality of life.

[0003] For existing wheelchairs, the rotational speeds of the wheels on both sides are the same. When turning, the inner and outer wheels travel different distances, resulting in additional friction between the tires and the ground. This not only increases tire wear but also makes the turning operation difficult, requiring the user to exert more effort to control the wheelchair's steering, causing inconvenience to the user. In addition, existing motors also have deficiencies in heat dissipation. After long-term use, the motor is prone to overheating, affecting the performance and service life of the motor. Summary of the Utility Model

[0004] To solve the above technical problems, a technical solution adopted by the utility model is: to provide a differential reduction motor for the rear axle of a wheelchair, including a differential reduction motor body. Heat dissipation fins are provided on the side surface of the differential reduction motor body. An output shaft is fixedly connected to the output end of the differential reduction motor body. A heat dissipation fan is fixedly connected to the side surface of the output shaft. Vertical plates are symmetrically arranged on the side surface of the differential reduction motor body;

[0005] A cooling device, which includes a coolant tank and a cooling pipe. A water pump is fixedly connected to the side surface of the coolant tank. The output end of the water pump is fixedly connected to the cooling pipe. A magnet sheet is fixedly connected to the side surface of the cooling pipe. A limiting plate is fixedly connected to the side surface of the differential reduction motor body. A temperature sensor is fixedly connected to the side surface of the differential reduction motor body. A control module is fixedly connected to the side surface of the coolant tank.

[0006] Through the above technical solution, when the differential reduction motor body is installed on a wheelchair and used, it can automatically adjust the rotational speeds of the wheels on both sides, reducing the rotational speed of the inner wheel and increasing the rotational speed of the outer wheel, thereby realizing the differential function, reducing the friction between the tires and the ground, and improving the flexibility and smoothness of turning. While driving the tires to rotate, the differential reduction motor body can drive the heat dissipation fan to rotate to generate an air flow, accelerating the air flow and dissipating heat from the differential reduction motor body. The temperature sensor can detect the temperature of the differential reduction motor body and transmit the information to the control module. The control module can control the water pump to start and pump the coolant into the cooling pipe. The cooling pipe is wound around the outside of the differential reduction motor body to further improve the heat dissipation effect.

[0007] The present utility model is further configured such that the number of the heat dissipation fins is multiple and they are annularly distributed outside the differential reduction motor body. An output shaft support frame is fixedly connected to the side surface of the differential reduction motor body, and a fixing frame is fixedly connected to the side surface of the differential reduction motor body.

[0008] Through the above technical solution, the output shaft support frame supports the output shaft, increasing the stability during the rotation of the output shaft.

[0009] The present utility model is further configured such that the side surface of the output shaft is rotatably connected to the output shaft support frame, and the input end of the water pump is communicated with the coolant tank through a connecting pipe.

[0010] Through the above technical solution, the water pump can pump out the coolant filled in the coolant tank.

[0011] The present utility model is further configured such that one end of the cooling pipe away from the water pump is communicated with the coolant tank. A liquid inlet pipe is fixedly connected to the upper surface of the coolant tank. A sealing cover is arranged on the side surface of the liquid inlet pipe, and an observation window is arranged on the side surface of the coolant tank.

[0012] Through the above technical solution, the coolant can be filled into the coolant tank through the liquid inlet pipe, and the amount of the coolant entering can be observed through the observation window.

[0013] The present utility model is further configured such that the material of the limiting plate is iron, the side surface of the magnet sheet is magnetically connected to the limiting plate, and the side surface of the cooling pipe is in contact with the differential reduction motor body.

[0014] Through the above technical solution, the magnet sheet can be adsorbed on the limiting plate, thereby being used to fix the position of the wound cooling pipe.

[0015] The present utility model is further configured such that a base is fixedly connected to the lower surface of the coolant tank. An L-shaped bottom frame is fixedly connected to the side surface of the base. A slider is fixedly connected to the upper surface of the L-shaped bottom frame, and a bolt is threadedly connected to the upper surface of the L-shaped bottom frame.

[0016] Through the above technical solution, the device can be fixedly installed on the wheelchair rear axle through the bolt.

[0017] The present utility model is further configured such that the upper surface of the L-shaped bottom frame is rotatably connected to a threaded rod through a bearing. A hexagonal block is fixedly connected to the side surface of the threaded rod, and the side surface of the threaded rod is threadedly connected to a vertical plate.

[0018] The present utility model is further configured such that sliding grooves are symmetrically arranged on the side surface of the vertical plate, and the side surface of the slider is slidably connected to the sliding grooves.

[0019] Through the above technical solution, rotating the hexagonal block causes the threaded rod to rotate, thereby enabling the adjustment of the height of the differential reduction motor body and fine-tuning the position during the installation of the differential reduction motor body.

[0020] The beneficial effects of the present utility model are as follows:

[0021] By installing the differential reduction motor body on a wheelchair, it can automatically adjust the rotational speeds of the two side wheels, reducing the rotational speed of the inner wheel and increasing the rotational speed of the outer wheel, thereby achieving the differential function, reducing the friction between the tire and the ground, and improving the flexibility and smoothness of turning. While driving the tire to rotate, the differential reduction motor body can drive the cooling fan to rotate to generate an air flow, accelerating the air flow and dissipating heat from the differential reduction motor body. The heat dissipation effect is further improved in cooperation with the wound cooling pipe. Description of the Drawings

[0022] Figure 1 is the first perspective structure diagram of a differential reduction motor for the rear axle of a wheelchair of the present utility model;

[0023] Figure 2 is the second perspective structure diagram of a differential reduction motor for the rear axle of a wheelchair of the present utility model;

[0024] Figure 3 is Figure 2 the enlarged view of part A in

[0025] Figure 4 is Figure 2 the enlarged view of part B in

[0026] Reference numerals: 1, differential reduction motor body; 2, heat dissipation fins; 3, output shaft; 4, output shaft support frame; 5, fixing frame; 6, cooling fan; 7, vertical plate; 8, threaded rod; 9, hexagonal block; 10, L-shaped bottom frame; 11, slider; 12, chute; 13, base; 14, coolant tank; 15, water pump; 16, cooling pipe; 17, magnet sheet; 18, limit plate; 19, temperature sensor; 20, control module; 21, observation window; 22, liquid inlet pipe; 23, bolt. Detailed Embodiments

[0027] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] As Figures 1 - 4As shown in the figure, a differential reduction motor for the rear axle of a wheelchair in this embodiment includes a differential reduction motor body 1. A heat dissipation fin 2 is provided on the side surface of the differential reduction motor body 1. The heat dissipation fin 2 can increase the heat dissipation area of the differential reduction motor body 1 and accelerate the dissipation of heat. An output shaft 3 is fixedly connected to the output end of the differential reduction motor body 1. The number of heat dissipation fins 2 is multiple and they are annularly distributed outside the differential reduction motor body 1. An output shaft support frame 4 is fixedly connected to the side surface of the differential reduction motor body 1, and the output shaft support frame 4 plays a supporting role for the output shaft 3.

[0029] A fixed frame 5 is fixedly connected to the side surface of the differential reduction motor body 1, and a heat dissipation fan 6 is fixedly connected to the side surface of the output shaft 3. Vertical plates 7 are symmetrically arranged on the side surface of the differential reduction motor body 1. During the rotation of the output shaft 3, the heat dissipation fan 6 rotates synchronously to accelerate the air flow around the differential reduction motor body 1 and cool the differential reduction motor body 1.

[0030] A temperature reduction device, which includes a coolant tank 14 and a cooling pipe 16. A refrigerating sheet is arranged in the coolant tank 14 for refrigerating the coolant. A water pump 15 is fixedly connected to the side surface of the coolant tank 14. The side surface of the output shaft 3 is rotationally connected to the output shaft support frame 4. The input end of the water pump 15 is communicated with the coolant tank 14 through a connecting pipe, and the output end of the water pump 15 is fixedly connected to the cooling pipe 16.

[0031] A magnet sheet 17 is fixedly connected to the side surface of the cooling pipe 16, and a limiting plate 18 is fixedly connected to the side surface of the differential reduction motor body 1. The material of the limiting plate 18 is iron, and the side surface of the magnet sheet 17 is magnetically connected to the limiting plate 18. The magnet sheet 17 is adsorbed on the limiting plate 18 to fix the position of the cooling pipe 16 on the differential reduction motor body 1. The side surface of the cooling pipe 16 is in contact with the differential reduction motor body 1. A temperature sensor 19 is fixedly connected to the side surface of the differential reduction motor body 1, and a control module 20 is fixedly connected to the side surface of the coolant tank 14. One end of the cooling pipe 16 far away from the water pump 15 is communicated with the coolant tank 14. A liquid inlet pipe 22 is fixedly connected to the upper surface of the coolant tank 14, and a sealing cover is arranged on the side surface of the liquid inlet pipe 22. An observation window 21 is arranged on the side surface of the coolant tank 14.

[0032] The differential reduction motor body 1, the water pump 15, the temperature sensor 19, the control module 20 and the refrigerating sheet are all electrically connected to an external power supply. The temperature sensor 19, the water pump 15 and the refrigerating sheet are electrically connected to a controller. This is the prior art and is known to those skilled in the art. The amount of coolant filled in the coolant tank 14 can be observed through the observation window 21.

[0033] The temperature sensor 19 is used to detect the temperature of the surface of the differential reduction motor body 1. When the temperature exceeds the threshold, the control module 20 receives the information of the temperature increase and controls the water pump 15 to turn on. At the same time, the thermoelectric cooler is controlled to start. The water pump 15 pumps the coolant in the coolant tank 14 into the cooling pipe 16, and the cooling pipe 16 cools the differential reduction motor body 1 to improve the cooling efficiency.

[0034] The lower surface of the coolant tank 14 is fixedly connected with a base 13. The side surface of the base 13 is fixedly connected with an L-shaped chassis 10. The upper surface of the L-shaped chassis 10 is fixedly connected with a slider 11. The upper surface of the L-shaped chassis 10 is threadedly connected with a bolt 23. The upper surface of the L-shaped chassis 10 is rotatably connected with a threaded rod 8 through a bearing. A hexagonal block 9 is fixedly connected to the side surface of the threaded rod 8. The side surface of the threaded rod 8 is threadedly connected with a vertical plate 7. Chutes 12 are symmetrically arranged on the side surface of the vertical plate 7, and the side surface of the slider 11 is slidably connected with the chutes 12.

[0035] When fine-tuning the installation height of the differential reduction motor body 1, just rotate the hexagonal block 9 to make the threaded rod 8 rotate.

[0036] The working principle of the present utility model is as follows. When this device is installed on the rear axle of a wheelchair, place the base 13 at the installation position of the rear axle. When it is necessary to fine-tune the height of the differential reduction motor body 1, rotate the hexagonal block 9 to make the threaded rod 8 rotate, so as to fine-tune the height of the differential reduction motor body 1. Then, fix the L-shaped chassis 10 to the rear axle of the wheelchair through the bolt 23. When the wheelchair moves forward, the output shaft 3 drives the wheelchair tire to rotate and at the same time drives the radiator fan 6 to rotate. When the temperature sensor 19 detects that the temperature of the differential reduction motor body 1 exceeds the threshold, it transmits the information to the control module 20. The control module 20 turns on the water pump 15 to pump the coolant in the coolant tank 14 into the cooling pipe 16, so that the coolant circulates to help cool the differential reduction motor body 1.

[0037] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A wheelchair rear axle differential reduction motor, comprising a differential reduction motor body (1), characterized in that: The side surface of the differential reduction motor body (1) is provided with a heat dissipation fin (2); the output end of the differential reduction motor body (1) is fixedly connected to an output shaft (3); the side surface of the output shaft (3) is fixedly connected to a heat dissipation fan (6); and the side surface of the differential reduction motor body (1) is symmetrically provided with a vertical plate (7); A cooling device, the cooling device comprising a cooling liquid tank (14) and a cooling pipe (16), the side surface of the cooling liquid tank (14) being fixedly connected to a water pump (15), the output end of the water pump (15) being fixedly connected to the cooling pipe (16), the side surface of the cooling pipe (16) being fixedly connected to a magnet sheet (17), the side surface of the differential reduction motor body (1) being fixedly connected to a limit plate (18), the side surface of the differential reduction motor body (1) being fixedly connected to a temperature sensor (19), and the side surface of the cooling liquid tank (14) being fixedly connected to a control module (20).

2. The wheelchair rear axle differential reduction motor according to claim 1, characterized in that: The number of the heat dissipation fins (2) is multiple and they are distributed in a ring shape outside the differential reduction motor body (1); the side surface of the differential reduction motor body (1) is fixedly connected to an output shaft support frame (4); and the side surface of the differential reduction motor body (1) is fixedly connected to a fixing frame (5).

3. The rear axle differential reduction motor of a wheelchair according to claim 2, characterized in that: The side surface of the output shaft (3) is rotatably connected to the output shaft support frame (4), and the input end of the water pump (15) is connected to the coolant tank (14) via a connecting pipe.

4. The wheelchair rear axle differential reduction motor according to claim 1, characterized in that: One end of the cooling pipe (16) away from the water pump (15) is in communication with the coolant tank (14); a liquid inlet pipe (22) is fixedly connected to the upper surface of the coolant tank (14); a sealing cover is provided on the side surface of the liquid inlet pipe (22); and an observation window (21) is provided on the side surface of the coolant tank (14).

5. The wheelchair rear axle differential reduction motor according to claim 1, characterized in that: The material of the limiting plate (18) is iron, the side surface of the magnet sheet (17) is magnetically connected to the limiting plate (18), and the side surface of the cooling pipe (16) is in contact with the differential reduction motor body (1).

6. The wheelchair rear axle differential reduction motor according to claim 1, characterized in that: The lower surface of the coolant tank (14) is fixedly connected to a base (13), the side surface of the base (13) is fixedly connected to an L-shaped base frame (10), the upper surface of the L-shaped base frame (10) is fixedly connected to a slider (11), and the upper surface of the L-shaped base frame (10) is threadedly connected to a bolt (23).

7. The wheelchair rear axle differential reduction motor according to claim 6, characterized in that: The upper surface of the L-shaped base frame (10) is rotatably connected to a threaded rod (8) via a bearing, the side surface of the threaded rod (8) is fixedly connected to a hexagonal block (9), and the side surface of the threaded rod (8) is threadedly connected to the vertical plate (7).

8. The wheelchair rear axle differential reduction motor according to claim 6, characterized in that: The side surfaces of the vertical plates (7) are symmetrically provided with sliding grooves (12), and the side surfaces of the sliding blocks (11) are slidably connected to the sliding grooves (12).

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