Motor shaft of wheelchair

Abstract

The utility model relates to a wheelchair motor shaft, and relates to the technical field of electric wheelchairs, the wheelchair motor shaft comprises a main shaft, the main shaft is provided with a plurality of heat dissipation fins, and the heat dissipation fins are spirally arranged around the main shaft. The radiating fins are mounted on the main shaft, so that the contact between the motor shaft and airflow is increased in the rotating process of the motor shaft, the radiating area is increased, and the radiating efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric wheelchairs, and specifically refers to a wheelchair motor shaft. Background Technology

[0002] Wheelchairs, as important assistive devices designed specifically for people with mobility impairments, greatly improve the user's mobility. Electric wheelchairs, in particular, use batteries as their core power source and employ sophisticated control devices to precisely regulate motor operation, thereby achieving propulsion. The motor shaft plays a crucial role in the electric wheelchair's motor system, primarily connecting to the gearbox. Through the meshing and combination of different gears within the gearbox, the wheelchair's speed can be flexibly switched to meet diverse mobility needs. To ensure the stability of the gears during high-speed operation, the gearbox is specially designed with an oil reservoir. The circulating flow of lubricating oil effectively prevents gear damage due to overheating from friction, ensuring the efficient operation of the entire transmission system.

[0003] In actual operation, motors heat up rapidly due to the continuous conversion of electrical energy into mechanical energy. Under current technology, motor cooling devices are mostly built into the motor housing, primarily working to gradually dissipate the heat generated inside the motor. However, the extremely compact structure under the wheelchair seat at the motor shaft makes natural convection difficult, significantly limiting heat dissipation and requiring improvement in the motor shaft's heat dissipation efficiency. Summary of the Invention

[0004] The purpose of this utility model is to provide a chair motor shaft to solve the technical problems mentioned in the background art.

[0005] This utility model is implemented as follows:

[0006] A wheelchair motor shaft includes a main shaft with heat dissipation fins arranged spirally around the main shaft.

[0007] Preferably, the main shaft has a flow channel, the main shaft has a connector, and the connector is externally connected to a flexible hose for introducing cooling oil into the flow channel.

[0008] Preferably, the heat dissipation fins have an inlet space, which is connected to the flow channel.

[0009] Preferably, the connector includes a connecting ring disposed on the main shaft, a rotating ring rotatably connected to the connecting ring, and a connecting nozzle disposed on the rotating ring. The connecting nozzle is used to connect a flexible hose. The connecting ring has a connecting hole located on the extension path of the flow channel. The rotating ring is arranged around the outer periphery of the connecting hole. The connecting hole communicates with the interior of the connecting nozzle and the flow channel.

[0010] Preferably, there are two connectors, which are located at opposite ends of the flow channel.

[0011] Preferably, the rotating ring is provided with a sealing ring, the sealing ring is fitted to the inner wall of the connecting hole, and the sealing ring is used to seal the gap between the rotating ring and the connecting ring.

[0012] Preferably, a plurality of balls are embedded on the rotating ring, and the plurality of balls are arranged around the outer periphery of the connecting hole, with the balls abutting against the connecting ring.

[0013] Preferably, the connector is provided with a filter screen, which covers the inlet of the connector.

[0014] The outstanding advantages of this utility model compared to the prior art are:

[0015] 1. This utility model increases the contact between the motor shaft and the airflow during the rotation of the motor shaft by installing heat dissipation fins on the main shaft, thereby increasing the heat dissipation area and improving the heat dissipation efficiency.

[0016] 2. This utility model further accelerates the heat dissipation efficiency of the spindle by opening a flow channel on the spindle, allowing the cooling oil to enter the flow channel along the hose.

[0017] 3. This utility model has an inlet space on the heat dissipation fins that is connected to the flow channel, which increases the heat dissipation effect of the heat dissipation oil in the motor shaft during the motor rotation process, and is conducive to uniform heat dissipation of the motor shaft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 yes Figure 1 The enlarged view of section A mainly shows the structure of the connection nozzle used for liquid inlet;

[0020] Figure 3 This is a partial sectional view of the present invention, mainly showing the structure of the connector used for liquid discharge;

[0021] Figure 4 This is a partial sectional view of the present invention, mainly showing the structure of the heat dissipation fins.

[0022] Instruction manual drawing reference numerals: 1. Main shaft; 11. Flow channel; 12. Heat dissipation fins; 121. Inlet space; 2. Connector; 21. Connecting ring; 211. Connecting hole; 212. Mounting port; 213. Annular groove; 214. Sealing ring; 22. Rotary ring; 221. Ball bearing; 23. Connecting nozzle; 231. Filter screen. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. See below for details. Figure 1 —4:

[0024] This application discloses a wheelchair motor shaft. See also: A wheelchair motor shaft. Figure 1 It includes a main shaft 1, on which a flow channel 11 is provided. The flow channel 11 passes through the axis of the main shaft 1, and the length direction of the flow channel 11 is parallel to the axis direction of the main shaft 1. The flow channel 11 passes through one end of the main shaft 1 and exits the housing.

[0025] See Figure 2 and Figure 3 Two connectors 2 are fixed on the flow channel 11, located at opposite ends of the flow channel 11, with their distribution direction parallel to the axis of the flow channel 11. Each connector 2 includes a connecting ring 21, a rotating ring 22, and a connecting nozzle 23. The connecting ring 21 is fixed to the main shaft 1 and has a connecting hole 211 located on the extension path of the flow channel 11, communicating with the flow channel 11. The connecting ring 21 is fixed to the main shaft 1 by welding. The connecting hole 211 and the flow channel 11 have circular cross-sections perpendicular to the axis of the main shaft 1, with the diameter of the connecting hole 211 being larger than the diameter of the flow channel 11.

[0026] See Figure 3 The rotating ring 22 is rotatably connected to the connecting ring 21. The connecting ring 21 has a mounting port 212 in the middle. The rotating ring 22 is inserted into the mounting port 212. The rotation axis of the rotating ring 22 is coaxial with the axis of the main shaft 1. The rotating ring 22 is arranged around the outer circumference of the connecting hole 211.

[0027] See Figure 3 The rotating ring 22 has several balls 221 embedded at opposite ends parallel to its own rotation axis. The balls 221 are evenly distributed at equal intervals around the outer circumference of the connecting hole 211. The connecting ring 21 has an annular groove 213, which is arranged around the outer circumference of the connecting hole 211. The annular groove 213 is located on both sides of the mounting port 212. The annular groove 213 allows the balls 221 on the rotating ring 22 to be engaged and limited.

[0028] See Figure 2 and Figure 3The connecting nozzle 23 is fixed to the rotating ring 22, and the connecting nozzle 23 is rotatably connected to the connecting ring 21 via the rotating ring 22. The connecting nozzle 23 is used to connect an external hose, and the cooling oil enters and exits the connecting hole 211 through the connecting nozzle 23. A filter screen 231 is fixed on one of the connecting nozzles 23, which covers the inlet of the connecting nozzle 23 for the cooling oil to enter, filtering the cooling oil entering the flow channel 11 and reducing impurities entering the flow channel 11. A sealing ring 214 is fixed on the connecting ring 21, and the sealing ring 214 is arranged around the outer circumference of the connecting ring 21. The outer ring of the sealing ring 214 abuts against the inner wall of the connecting mounting port 212 for sealing, and the sealing ring 214 is used to seal the gap between the rotating ring 22 and the connecting ring 21.

[0029] During the operation of the wheelchair, when the motor shaft temperature rises, cooling oil enters the flow channel 11 through one of the connection nozzles 23 and then flows out from the other connection nozzle 23, cooling the main shaft 1 through the cooling oil.

[0030] See Figure 1 and Figure 4 A number of heat dissipation fins 12 are fixed on the main shaft 1. The heat dissipation fins 12 are arranged at intervals around the main shaft 1 in a spiral arrangement. The heat dissipation fins 12 are integrally formed with the main shaft 1. The heat dissipation fins 12 are located between two connecting rings 21 and protrude from the main shaft 1. An inlet space 12 is opened inside the heat dissipation fins 12. The inlet space 12 is connected to the flow channel 11. The heat dissipation oil enters the heat dissipation fins 12 through the flow channel 11.

[0031] During motor shaft rotation, the heat dissipation fins 12 enhance air convection near the motor shaft, thereby improving heat dissipation efficiency. Cooling oil enters the flow channel 11 through one of the connectors 23, then flows into the inlet space 12, and exits from the other side of the inlet space 12, leaving the motor shaft through another connector 23. When the cooling oil enters the inlet space 12, the contact area between the cooling oil and the motor shaft increases, improving heat transfer efficiency and thus enhancing heat dissipation. Furthermore, the flow channel 11 and inlet space 12 on the motor shaft help reduce its weight.

[0032] The implementation principle of a wheelchair motor shaft in this application embodiment is as follows: During the movement of the wheelchair, the motor shaft rotates. By adding spiral heat dissipation fins 12 to the main shaft 1, the heat dissipation area of ​​the motor shaft is increased, which is beneficial to improving the heat dissipation efficiency.

[0033] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A wheelchair motor shaft, characterized in that: Includes a main shaft (1), on which a plurality of heat dissipation fins (12) are provided, the heat dissipation fins (12) being spirally arranged around the main shaft (1); The main shaft (1) is provided with a flow channel (11) and a connector (2) is provided on the main shaft (1). The connector (2) is connected to a flexible hose for introducing heat dissipation oil into the flow channel (11).

2. The wheelchair motor shaft according to claim 1, characterized in that: The heat dissipation fins (12) have an inlet space (121) which is connected to the flow channel (11).

3. The wheelchair motor shaft according to claim 2, characterized in that: The connector (2) includes a connecting ring (21) on the main shaft (1), a rotating ring (22) rotatably connected to the connecting ring (21), and a connecting nozzle (23) on the rotating ring (22). The connecting nozzle (23) is used to connect a flexible hose. A connecting hole (211) is provided on the connecting ring (211). The connecting hole (211) is located on the extension path of the flow channel (11). The rotating ring (22) is arranged around the outer periphery of the connecting hole (211).

4. A wheelchair motor shaft according to claim 2, characterized in that: There are two connectors (2), which are located at opposite ends of the flow channel (11).

5. A wheelchair motor shaft according to claim 3, characterized in that: The rotating ring (22) is provided with a plurality of balls (221), which are arranged around the outer periphery of the connecting hole (211) and abut against the connecting ring (21).

6. A wheelchair motor shaft according to claim 5, characterized in that: The rotating ring (22) is provided with a sealing ring (214), which is arranged around the outer periphery of the rotating ring (22) and is used to seal the gap between the rotating ring (22) and the connecting ring (21).

7. A wheelchair motor shaft according to claim 3, characterized in that: The connector (23) is provided with a filter screen (231), which covers the inlet of the connector (23).

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