Quick release structure for rear wheel of motor of electric wheelchair

Abstract

The utility model provides a quick release structure of a motor rear wheel of an electric wheelchair. The quick release structure comprises a motor wheel, a motor shaft, a frame, a mounting sleeve, a limiting mechanism, a wiring male plug and a wiring female plug, the mounting sleeve is arranged on the frame, the left end of the mounting sleeve is provided with a wiring male plug connected with the controller and the battery pack, the limiting mechanism is arranged in the middle of the mounting sleeve, the right end of the motor shaft is connected with the motor wheel, and the left end of the motor shaft is provided with a wiring female plug connected with the motor wheel; when the motor shaft is inserted into the mounting sleeve from the right end of the mounting sleeve, the wiring male plug and the wiring female plug are connected and electrified, and the limiting mechanism is matched with the motor shaft to limit circumferential rotation and axial movement of the motor shaft; when the motor wheel is disassembled and assembled, the connection between the motor wheel and the controller and the connection between the motor wheel and the battery pack can be disconnected or connected at the same time, the motor wheel can be quickly disassembled and assembled, and transportation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric wheelchairs, and particularly relates to a quick-release structure for the motor rear wheels of an electric wheelchair vehicle. Background Art

[0002] An electric wheelchair is mainly used for a wheelchair vehicle driven by electricity, which can move forward, backward and turn, and can be used indoors and outdoors, and is easy and convenient to operate. However, the electric wheelchairs on the current market generally have the problems that the whole vehicle is heavy and difficult to carry. When it is necessary to travel long distances, the handling and transfer are very inconvenient and difficult to transport. Moreover, the main weight of the electric wheelchair lies in the driving motor rear wheels with a relatively high weight ratio (hereinafter referred to as motor wheels). If the motor wheels cannot be quickly disassembled, they can only be transferred together with the wheelchair main body. Therefore, the motor wheels need to be set as a detachable structure.

[0003] However, the motor wheels need to be connected to the controller and the battery pack on the wheelchair frame through power lines. If the motor wheels are to be disassembled, the connections between the motor wheels and the controller and the battery pack need to be disconnected first. Generally, the power lines between the existing motor wheels and the controller and the battery pack cannot be disconnected, thus making it inconvenient to disassemble the motor wheels. There are also some electric wheelchairs with wire connectors provided in the middle of the power lines. The motor wheels are connected to the controller and the battery pack through the wire connectors. When disassembling this structure, the wire connectors need to be disconnected first, and then the motor wheels can be disassembled. When installing, the motor wheels need to be installed first, and then the wire connectors need to be connected. The disassembly and assembly of the motor wheels are not convenient enough. Moreover, the wire connectors are prone to disconnection, and tapes need to be wound around the wire connectors to prevent accidental disconnection or loosening of the wire connectors. Therefore, when disassembling the motor wheels, the tapes need to be untied, making the steps of disassembling and assembling the motor wheels more cumbersome. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a quick-release structure for the motor rear wheels of an electric wheelchair vehicle, which can disconnect or connect the motor wheels with the controller and the battery pack while disassembling and assembling the motor wheels, can quickly disassemble and assemble the motor wheels, and is convenient for transportation.

[0005] To achieve the above purpose, the solution of the utility model is: a quick-release structure for the motor rear wheels of an electric wheelchair vehicle, comprising motor wheels, motor shafts, a vehicle frame, mounting sleeves, a limiting mechanism, male wiring plugs and female wiring plugs;

[0006] The mounting sleeves are arranged on the vehicle frame. The male wiring plugs for connecting the controller and the battery pack are arranged at the left ends of the mounting sleeves. The limiting mechanism is arranged in the middle of the mounting sleeves. The right ends of the motor shafts are connected to the motor wheels, and the female wiring plugs for connecting the motor wheels are arranged at the left ends of the motor shafts;

[0007] When the motor shaft is inserted into the mounting sleeve from the right end of the mounting sleeve, the male wiring plug and the female wiring plug are connected and energized, and the limiting mechanism cooperates with the motor shaft to limit the circumferential rotation and axial movement of the motor shaft; when the limiting mechanism is released and the motor shaft is pulled out of the mounting sleeve, the male wiring plug and the female wiring plug are disconnected.

[0008] Furthermore, the limiting mechanism includes a limiting latch, a spring, and a latch sleeve. A mounting hole is radially opened on the mounting sleeve, the latch sleeve is fixed on the mounting hole, the limiting latch is movably arranged in the latch sleeve, the spring is sleeved on the limiting latch, and the two ends of the spring are respectively connected to the latch sleeve and the limiting latch, a positioning hole is radially opened on the motor shaft, and when the motor shaft is inserted into the mounting sleeve, the limiting latch is inserted into the positioning hole.

[0009] Furthermore, the bottom of the latch sleeve is fixed to the mounting hole, the top of the latch sleeve is provided with a slot, the top of the limit latch is provided with an end cap, the bottom of the end cap is protrudingly provided with an insert block, when the bottom of the limit latch is inserted into the positioning hole, the insert block cooperates with the slot, after the limit latch is pulled out to disengage the positioning latch from the positioning hole, the end cap is rotated to rotate the limit latch until the insert block is staggered with the slot, and the insert block abuts against the top of the latch sleeve.

[0010] Furthermore, the outer circumference of the motor shaft is configured to be a tapered cylinder, the outer diameter of the left end of the motor shaft is smaller than the outer diameter of the right end, and the interior of the mounting sleeve is provided with a tapered inner hole that matches the motor shaft.

[0011] Furthermore, a first limiting plane is provided on the outer circumference of the motor shaft, and a second limiting plane is provided on the inner circumference of the mounting sleeve, and the first limiting plane cooperates with the second limiting plane to limit the circumferential rotation of the motor shaft.

[0012] Furthermore, a rounded corner is provided at the left end of the motor shaft, and when the motor shaft is inserted into the mounting sleeve, the rounded corner pushes the limit latch to move upward to be retracted into the latch sleeve.

[0013] Furthermore, a shaft sleeve is sleeved on the outer periphery of the motor shaft, the female terminal plug is arranged at the left end of the shaft sleeve, and a limiting hole for inserting the pin sleeve is radially opened on the shaft sleeve.

[0014] Furthermore, the shaft sleeve is a tapered sleeve, the outer diameter of the left end of the shaft sleeve is smaller than the outer diameter of the right end, and the interior of the mounting sleeve is provided with a tapered inner hole that matches the tapered sleeve.

[0015] Furthermore, a first limiting plane is provided on the outer circumference of the shaft sleeve, and a second limiting plane is provided on the inner circumference of the mounting sleeve, and the first limiting plane cooperates with the second limiting plane to limit the circumferential rotation of the shaft sleeve.

[0016] Further, a rounded corner is provided at the left end of the bushing. When the bushing is inserted into the mounting sleeve, the rounded corner pushes the limit pin upwards to retract it into the pin sleeve.

[0017] After adopting the above scheme, the beneficial effects of the present utility model are as follows:

[0018] In the present utility model, a mounting sleeve is provided on the vehicle frame. A male wiring plug connecting the controller and the battery pack is installed at the left end of the mounting sleeve, and a female wiring plug connecting the motor wheel is installed at the left end of the motor shaft. When installing the motor wheel, only the left end of the motor shaft needs to be inserted into the right end of the mounting sleeve until the male wiring plug and the female wiring plug are connected and powered on. Then, the limiting mechanism cooperates with the motor shaft to restrict the circumferential rotation and axial movement of the motor shaft, completing the installation of the motor wheel; when disassembling the motor wheel, only the limiting mechanism needs to be unlocked, and then the motor shaft is pulled out of the mounting sleeve to complete the disassembly of the motor wheel.

[0019] Thus, in the present utility model, the motor wheel can be installed by inserting the motor shaft into the mounting sleeve and locking the motor shaft with the limiting mechanism, and the motor wheel can be disassembled by unlocking the limiting mechanism and pulling the motor shaft out of the mounting sleeve. Moreover, when the installation of the motor shaft is completed, the male wiring plug and the female wiring plug can be connected, enabling the motor wheel to be connected to the controller and the battery pack on the vehicle frame; when the motor shaft is pulled out, the connection between the male wiring plug and the female wiring plug will be disconnected. Therefore, when disassembling and assembling the motor wheel, the connection between the motor wheel and the controller and the battery pack can be disconnected or connected, making the disassembly and assembly of the motor wheel fast, simple, and convenient, facilitating transportation. And the limiting mechanism axially limits the motor shaft, so that the motor shaft will not come out of the mounting sleeve, and the connection between the male wiring plug and the female wiring plug will not be disconnected, eliminating the need to additionally provide a structure for strengthening the connection between the male wiring plug and the female wiring plug, solving the problem of inconvenient disassembly and assembly of the existing motor wheel. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present utility model;

[0021] Figure 2 For the present utility model Figure 1 It is a sectional view taken along the A-A direction in the present utility model;

[0022] Figure 3 For the present utility model Figure 2 It is a partial enlarged view at C in the present utility model;

[0023] Figure 4 For the present utility model Figure 2 It is a sectional view taken along the B-B direction in the present utility model;

[0024] Figure 5 It is an exploded view of the parts of the first embodiment of the present utility model (the vehicle frame is omitted);

[0025] Figure 6 It is the exploded view of the limiting mechanism in the first embodiment of the present utility model;

[0026] Figure 7 It is the structural schematic diagram of the bushing in the first embodiment of the present utility model;

[0027] Figure 8 It is the structural schematic diagram of the male connection plug in the first embodiment of the present utility model;

[0028] Figure 9 It is the structural schematic diagram of the female connection plug in the first embodiment of the present utility model;

[0029] Figure 10 It is the exploded view of the second embodiment of the present utility model;

[0030] Figure 11 It is the cross-sectional view of the second embodiment of the present utility model;

[0031] Figure 12 For the present utility model Figure 11 The partial enlarged view at position D.

[0032] Label description:

[0033] 1. Motor pulley; 11. Motor shaft; 2. Frame; 3. Bushing; 31. Positioning hole; 32. Rounded corner; 33. First limiting plane; 4. Mounting sleeve; 41. Mounting hole; 42. Tapered inner hole; 43. Second limiting plane; 5. Limiting mechanism; 51. Limiting pin; 52. Spring; 53. Pin sleeve; 531. Slot; 54. End cap; 541. Insert block; 6. Male connection plug; 61. Pin; 62. Insertion groove; 7. Female connection plug; 71. Jack; 8. Screw; 9. Gasket. Detailed implementation manners

[0034] The following makes a detailed description of the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0035] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0036] Embodiment 1:

[0037] As Figures 1-9As shown in the figure, this embodiment provides a quick-release structure for the motor rear wheel of an electric wheelchair, including a motor wheel 1, a frame 2, a bushing 3, a mounting sleeve 4, a limiting mechanism 5, a male wiring plug 6, and a female wiring plug 7; the mounting sleeve 4 is arranged on the frame 2, and a controller and a battery pack (not shown in the figure) are provided on the frame 2. The male wiring plug 6 for connecting the controller and the battery pack is arranged at the left end of the mounting sleeve 4. The limiting mechanism 5 is arranged in the middle of the mounting sleeve 4 and is used to limit the circumferential rotation and radial movement of the bushing 3; the right end of the bushing 3 is sleeved and fixed on the motor shaft 11 of the motor wheel 1, and the female wiring plug 7 for connecting the motor wheel 1 is arranged at the left end of the bushing 3. The working principle of disassembling and assembling the motor wheel 1 is as follows:

[0038] When installing the motor wheel 1, insert the left end of the bushing 3 into the right end of the mounting sleeve 4 until the male wiring plug 6 and the female wiring plug 7 are connected to energize the motor wheel 1. Then, the limiting mechanism 5 cooperates with the bushing 3 to limit the circumferential rotation and axial movement of the bushing 3. The motor wheel 1 can rotate relative to the motor shaft 11 to make the wheelchair move, completing the installation of the motor wheel 1; when disassembling the motor wheel 1, first unlock the limiting mechanism 5, and then pull out the bushing 3 from the mounting sleeve 4 to complete the disassembly of the motor wheel 1.

[0039] Therefore, in this embodiment, inserting the bushing 3 into the mounting sleeve 4 and locking the bushing 3 with the limiting mechanism 5 can complete the installation of the motor wheel 1. Unlock the limiting mechanism 5 and pull out the bushing 3 from the mounting sleeve 4 to disassemble the motor wheel 1. Moreover, when the bushing 3 is installed, the male wiring plug 6 and the female wiring plug 7 can be connected, so that the motor wheel 1 is connected to the controller and the battery pack on the frame 2. When the bushing 3 is pulled out, the connection between the male wiring plug 6 and the female wiring plug 7 will be disconnected. Thus, when disassembling and assembling the motor wheel 1, the connection between the motor wheel 1 and the controller and the battery pack can be disconnected or connected, making the disassembly and assembly of the motor wheel 1 fast, simple, and convenient, which is convenient for transportation. And the limiting mechanism 5 axially limits the bushing 3, so that the bushing 3 will not come out of the mounting sleeve 4, and the connection between the male wiring plug 6 and the female wiring plug 7 will not be disconnected, eliminating the need to separately set up a structure to reinforce the connection between the male wiring plug 6 and the female wiring plug 7, solving the problem of inconvenient disassembly and assembly of the existing motor wheel 1.

[0040] The inner holes of the bushing 3 and the mounting sleeve 4 can both be cylindrical. Then, the diameter of the left end of the bushing 3 is equivalent to the aperture of the right end of the mounting sleeve 4. When installing, it is necessary to carefully align the inner holes of the bushing 3 and the mounting sleeve 4 before inserting the bushing 3 into the mounting sleeve 4, otherwise the bushing 3 and the mounting sleeve 4 are likely to be worn. Refer to Figure 2 and Figure 7, in this embodiment, the bushing 3 is preferably a tapered bushing. The outer diameter of the left end of the bushing 3 is smaller than that of the right end, and the diameter of the bushing 3 gradually increases from the left end to the right end. The inner part of the mounting sleeve 4 is provided with a tapered inner hole 42 that cooperates with the tapered bushing, that is, the aperture of the right end of the tapered inner hole 42 is larger than that of the left end, and the aperture of the right end of the tapered inner hole 42 is larger than the outer diameter of the left end of the bushing 3. So that during installation, the left end of the bushing 3 can be smoothly aligned with the tapered inner hole 42 and is easily inserted into the tapered inner hole 42 without wearing the bushing 3 and the mounting sleeve 4.

[0041] Furthermore, the limiting mechanism 5 can be a pin limiting mechanism 5 or a snap structure buckled with the bushing 3, or can also be a screw or bolt threadedly connected with the bushing 3, etc. For example, a through hole is opened on the mounting sleeve 4, and a threaded hole corresponding to the through hole is opened on the bushing 3. After the bushing 3 is installed in place, the screw passes through the through hole and is threadedly connected with the threaded hole to lock the bushing 3. In this embodiment, the structure of the spring 52 pin is preferably used to lock the bushing 3.

[0042] Specifically, with key reference to Figures 2-6 , the limiting mechanism 5 includes a limiting pin 51, a spring 52, and a pin sleeve 53. A mounting hole 41 is radially opened on the mounting sleeve 4, and the pin sleeve 53 is fixed on the mounting hole 41. The inside of the pin sleeve 53 is vertically communicated with the inside of the mounting sleeve 4. The limiting pin 51 is movably arranged in the pin sleeve 53. The spring 52 is sleeved on the limiting pin 51, and both ends of the spring 52 are respectively connected with the pin sleeve 53 and the limiting pin 51. A step can be provided at the top end inside the pin sleeve 53. One end of the spring 52 can abut against the step, and the other end is fixed to the limiting pin 51. A positioning hole 31 is radially opened on the bushing 3. When the bushing 3 is inserted into the mounting sleeve 4 and the male connection plug 6 and the female connection plug 7 are connected and powered on, the limiting pin 51 is pushed by the reset of the spring 52, and its bottom will be inserted into the positioning hole 31 to limit the axial movement and circumferential rotation of the bushing 3. While pulling up the limiting pin 51 and compressing the spring 52, the bottom of the limiting pin 51 can be separated from the positioning hole 31 to unlock the bushing 3, and then the bushing 3 can be pulled out of the mounting sleeve 4 to realize the disassembly of the motor wheel 1. Using the structure of the spring 52 pin to lock or unlock the bushing 3 is convenient for operation, making the disassembly and assembly of the motor wheel 1 faster and simpler.

[0043] With key reference to Figure 6The bottom of the latch sleeve 53 is fixed to the mounting hole 41, the top of the latch sleeve 53 is provided with a slot 531, the top of the limit latch 51 is provided with an end cap 54, and the bottom of the end cap 54 is convexly provided with an insert block 541. When the bottom of the limit latch 51 is inserted into the positioning hole 31, the insert block 541 is inserted into the slot 531 and cooperates with the slot 531. After the limit latch 51 is pulled out to be separated from the positioning hole 31, the insert block 541 is separated from the slot 531, and then the end cap 54 is rotated to rotate the limit latch 51 until the insert block 541 is staggered with the slot 531, and the insert block 541 will abut against the top of the latch sleeve 53, and at this time, the spring The spring 52 is compressed and the limit pin 51 is fixed in the position of retracting the pin sleeve 53. Then the shaft sleeve 3 can be inserted into the installation sleeve 4. After the shaft sleeve 3 is installed in place, the end cap 54 is rotated to align the insert block 541 with the slot 531. After the end cap 54 is loosened, the limit pin 51 is reset by the spring 52 and inserted into the positioning hole 31, and the insert block 541 is also inserted into the slot 531. This structure can stably maintain the limit pin 51 in the retracted state. During the process of inserting the shaft sleeve 3 into the installation sleeve 4, there is no need to hold the limit pin 51 by hand to maintain it in the retracted position, and it is easier to insert the shaft sleeve 3 into the installation sleeve 4.

[0044] Furthermore, two insert blocks 541 are symmetrically provided, and two slots 531 are correspondingly provided, so that the cooperation between the insert block 541 and the top of the latch sleeve 53 is more stable, and the bottom end of the limiting latch 51 is not easy to extend out of the latch sleeve 53.

[0045] Key References Figure 7 In this embodiment, a rounded corner 32 can be further provided at the left end of the shaft sleeve 3. When the shaft sleeve 3 is inserted into the mounting sleeve 4, the rounded corner 32 will push the limit pin 51 to move. If the limit pin 51 is located above the shaft sleeve 3, the limit pin 51 is pushed to move upward, and the bottom of the limit pin 51 is retracted into the pin sleeve 53, and the spring 52 is compressed. When the shaft sleeve 3 is installed in place, the positioning hole 31 is aligned with the mounting hole 41, and the limit pin 51 is pushed and inserted into the positioning hole 31 by the spring 52. Therefore, when installing the shaft sleeve 3, there is no need to manually pull the positioning pin into the pin sleeve 53 and maintain the positioning pin in this position. The motor wheel 1 can be disassembled and assembled by simply inserting the shaft sleeve 3 into the mounting sleeve 4 or pulling the shaft sleeve 3 out of the mounting sleeve 4. There is no need to manually trigger the limit mechanism 5, which makes the disassembly and assembly of the motor wheel 1 faster. It should be noted that the outer diameter of the female terminal plug 7 should be smaller than the outer diameter of the left end of the sleeve 3 , and when the sleeve 3 is inserted into the mounting sleeve 4 , the female terminal plug 7 does not contact the limit pin 51 .

[0046] Key References Figure 4 , Figure 5 and Figure 7, the right end of the bushing 3 is fixedly connected to the motor shaft 11 by screws 8. Specifically, through holes can be provided on the bushing 3 and threaded holes can be provided on the motor shaft 11, and the screws 8 pass through the through holes and are screwed into the threaded holes to fix the bushing 3 and the motor shaft 11. When the wheelchair is moving, the motor shaft 11 is stationary, and the wheel rotates relative to the motor shaft 11. Since the bushing 3 and the motor shaft 11 are fixed, the bushing 3 cannot rotate circumferentially either. Although the limit pin 51 has the function of restricting the circumferential rotation of the bushing 3, the torque during the actual movement of the wheelchair is very large. Only relying on the limit pin 51 to stop the rotation, the limit pin 51 is easily cut off. Therefore, in this embodiment, a first limit plane 33 is provided on the outer circumference of the bushing 3, and a second limit plane 43 is provided on the inner circumference of the mounting sleeve 4. The first limit plane 33 and the second limit plane 43 cooperate to restrict the circumferential rotation of the bushing 3 and prevent the limit pin 51 from being cut off. Moreover, the first limit plane 33 and the second limit plane 43 also have the function of preventing misassembly. Specifically, the connection direction of the male wiring plug 6 and the female wiring plug 7 is unique, and the mounting hole 41 and the limit hole also need to be in the same radial position. Therefore, the bushing 3 can only be inserted into the mounting sleeve 4 in one direction. During installation, first align the first limit plane 33 and the second limit plane 43, and then the position where the bushing 3 needs to be inserted can be determined. After the bushing 3 is inserted, the male wiring plug 6 and the female wiring plug 7 can be smoothly connected, and the mounting hole 41 and the positioning hole 31 can also be aligned, which is convenient for the user to accurately find the circumferential position of the bushing 3 for installation.

[0047] Refer to with emphasis Figure 3 , Figure 8 and Figure 9 , the mounting sleeve 4 is arranged at the bottom of the frame 2. The left end of the male wiring plug 6 is exposed outside the mounting sleeve 4 and is connected to the controller and the battery pack through wiring; the right end of the male wiring plug 6 is provided with pins 61. The right end of the female wiring plug 7 is located inside the bushing 3 and is connected to the motor wheel 1 through wiring. This wiring extends inside the bushing 3 and the motor shaft 11 to be connected to the motor wheel 1. The left end of the female wiring plug 7 is provided with sockets 71 that cooperate with the pins 61. After the bushing 3 is inserted in place, the pins 61 of the male wiring plug 6 are inserted into the sockets 71 of the female wiring plug 7 to connect the motor wheel 1 with the controller and the battery pack.

[0048] In addition, an insertion slot 62 is provided inside the right end of the male wiring plug 6, and the pins 61 are arranged in the insertion slot 62. When the bushing 3 is inserted into the mounting sleeve 4, the left end of the female wiring plug 7 is inserted into the insertion slot 62, making it easy for the pins 61 to be inserted into the sockets 71. Moreover, the insertion slot 62 also has the function of protecting the pins 61.

[0049] Such as Figure 3 and Figure 5As shown, a gasket 9 with a diameter larger than that of the shaft sleeve is provided between the motor wheel 1 and the motor shaft 44. When the male wiring plug 6 is connected and mated with the female wiring plug 7, the right end of the mounting sleeve 4 just abuts against and is positioned by the gasket 9. The gasket 9 can be adjusted to compensate for the error between the mounting sleeve 4 and the shaft sleeve 3, so as to achieve positioning when installing the motor wheel 1.

[0050] Threads can be provided on the outer periphery of the right end of the male wiring plug 6 and the inner periphery of the left end of the mounting sleeve 4, so that the right end of the male wiring plug 6 is threadedly connected to the left end of the mounting sleeve 4, which is convenient for disassembling and assembling the male wiring plug 6. Similarly, threads can also be provided on the outer periphery of the right end of the female wiring plug 7 and the inner periphery of the left end of the shaft sleeve 3, so that the right end of the female wiring plug 7 is threadedly connected to the left end of the shaft sleeve 3, which is convenient for disassembling and assembling the female wiring plug 7. In addition, the male wiring plug 6 is exposed and prone to falling off. In addition to threaded connection, as Figure 5 shown, a screw can be additionally provided to lock the male wiring plug 6, and screw mounting holes can be radially provided on the male wiring plug 6 and the mounting sleeve 4 for installation; as Figure 10 shown, axial screw mounting holes can also be provided at the left end of the male wiring plug 6 and the mounting sleeve 4 for installation.

[0051] In Embodiment 2:

[0052] Referring to Figures 10-12 , the difference between this embodiment and Embodiment 1 is that in this embodiment, the shaft sleeve 3 is not provided, the female wiring plug 7 is directly provided at the left end of the motor shaft 11, the right end of the motor shaft 11 is connected to the motor wheel 1. When installing the motor wheel 1, the motor shaft 11 is directly inserted into the mounting sleeve 4 until the male wiring plug 6 is connected and powered on with the female wiring plug 7, and then the limiting mechanism 5 restricts the circumferential rotation and axial movement of the motor shaft 11. When disassembling, unlock the limiting mechanism 5 and pull out the motor shaft 11 from the mounting sleeve 4 to complete the disassembly.

[0053] Specifically, a first limiting plane 33 is provided on the outer periphery of the motor shaft 11 to cooperate with the second limiting plane 43 on the inner periphery of the mounting sleeve 4. The outer periphery of the motor shaft 11 is formed into a conical cylinder shape, and the outer diameter of the left end of the motor shaft 11 is smaller than that of the right end, so that the motor shaft 11 directly cooperates with the conical inner hole in the mounting sleeve 4. And, a positioning hole 31 is radially provided on the motor shaft 11 to directly cooperate with the limiting pin 51. A fillet can also be provided at the left end of the motor shaft 11. When the motor shaft is inserted into the mounting sleeve 4, the fillet 32 will push the limiting pin 51 to move, realizing the automatic unlocking and locking limit of the limiting pin 51. The female wiring plug 7 can also be directly threadedly connected to the left end of the motor shaft 11.

[0054] The above are only the preferred embodiments of the present invention, and do not limit the design of this case. All equivalent changes made according to the key design of this case fall within the protection scope of this case.

Claims

1. A quick-release structure for the rear wheel of an electric wheelchair motor, characterized in that: It includes a motor wheel, a motor shaft, a frame, a mounting sleeve, a limit mechanism, a wiring male plug and a wiring female plug; The mounting sleeve is arranged on the vehicle frame, the left end of the mounting sleeve is provided with a male plug for connecting the controller and the battery pack, the limiting mechanism is arranged in the middle of the mounting sleeve, the right end of the motor shaft is connected to the motor wheel, and the left end of the motor shaft is provided with a female plug for connecting the motor wheel; When the motor shaft is inserted into the mounting sleeve from the right end of the mounting sleeve, the male wiring plug and the female wiring plug are connected and energized, and the limiting mechanism cooperates with the motor shaft to limit the circumferential rotation and axial movement of the motor shaft; when the limiting mechanism is released and the motor shaft is pulled out of the mounting sleeve, the male wiring plug and the female wiring plug are disconnected.

2. The quick-release structure of the rear wheel of the electric wheelchair motor as claimed in claim 1, characterized in that: The limiting mechanism includes a limiting latch, a spring, and a latch sleeve. A mounting hole is radially opened on the mounting sleeve. The latch sleeve is fixed on the mounting hole. The limiting latch is movably arranged in the latch sleeve. The spring is sleeved on the limiting latch, and the two ends of the spring are respectively connected to the latch sleeve and the limiting latch. A positioning hole is radially opened on the motor shaft. When the motor shaft is inserted into the mounting sleeve, the limiting latch is inserted into the positioning hole.

3. The quick-release structure of the rear wheel of the electric wheelchair motor as claimed in claim 2, characterized in that: The bottom of the latch sleeve is fixed to the mounting hole, a slot is provided at the top of the latch sleeve, an end cap is provided at the top of the limit latch, an insert block is protruded at the bottom of the end cap, when the bottom of the limit latch is inserted into the positioning hole, the insert block cooperates with the slot, after the limit latch is pulled out to disengage the positioning latch from the positioning hole, the end cap is rotated to rotate the limit latch until the insert block is staggered with the slot, and the insert block abuts against the top of the latch sleeve.

4. A quick-release structure for the rear wheel of an electric wheelchair motor as claimed in any one of claims 1 to 3, characterized in that: The outer circumference of the motor shaft is configured to be a tapered cylinder, the outer diameter of the left end of the motor shaft is smaller than the outer diameter of the right end, and the interior of the mounting sleeve is provided with a tapered inner hole that matches the motor shaft.

5. A quick-release structure for the rear wheel of an electric wheelchair motor as claimed in any one of claims 1 to 3, characterized in that: The outer circumference of the motor shaft is provided with a first limiting plane, and the inner circumference of the mounting sleeve is provided with a second limiting plane, and the first limiting plane cooperates with the second limiting plane to limit the circumferential rotation of the motor shaft.

6. A quick-release structure for the rear wheel of an electric wheelchair motor as claimed in claim 2 or 3, characterized in that: The left end of the motor shaft is provided with a rounded corner. When the motor shaft is inserted into the mounting sleeve, the rounded corner pushes the limit latch to move upward to retract into the latch sleeve.

7. The quick-release structure of the rear wheel of the electric wheelchair motor as claimed in claim 2 or 3, characterized in that: A shaft sleeve is sleeved on the outer periphery of the motor shaft, the female terminal plug is arranged at the left end of the shaft sleeve, and a limiting hole for inserting the pin sleeve is radially provided on the shaft sleeve.

8. The quick-release structure of the rear wheel of the electric wheelchair motor as claimed in claim 7, characterized in that: The shaft sleeve is a tapered sleeve, the outer diameter of the left end of the shaft sleeve is smaller than the outer diameter of the right end, and the interior of the mounting sleeve is provided with a tapered inner hole that matches the tapered sleeve.

9. The quick-release structure of the rear wheel of the electric wheelchair motor as claimed in claim 7, characterized in that: A first limiting plane is provided on the outer circumference of the shaft sleeve, and a second limiting plane is provided on the inner circumference of the mounting sleeve. The first limiting plane cooperates with the second limiting plane to limit the circumferential rotation of the shaft sleeve.

10. The quick-release structure of the rear wheel of the electric wheelchair motor as claimed in claim 7, characterized in that: The left end of the shaft sleeve is provided with a rounded corner. When the shaft sleeve is inserted into the mounting sleeve, the rounded corner pushes the limiting latch to move upward to retract into the latch sleeve.

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