Quick-release structure for motor rear wheel of electric wheelchair

Abstract

Provided in the present invention is a quick-release structure for a motor rear wheel of an electric wheelchair, comprising 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 wiring male plug connected to a controller and a battery pack is arranged at the left end of the mounting sleeve. 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. The wiring female plug connected to the motor wheel is arranged at the left end of the motor shaft. 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 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 When the limiting mechanism is released and the motor shaft is withdrawn from the mounting sleeve, the wiring male plug and the wiring female plug are disconnected. According to the present invention, the motor wheel can be disconnected or connected to the controller and the battery pack while the motor wheel is disassembled and assembled, such that the motor wheel can be quickly disassembled and assembled, thereby facilitating transportation.

Description

Quick release structure of motor rear wheel of electric wheelchair TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric wheelchair, and particularly relates to a quick release structure of motor rear wheel of electric wheelchair. BACKGROUND

[0002] The electric wheelchair is mainly used for wheelchair driven by electric power, and can move forward, backward and turn, and is easy and convenient to operate. However, the electric wheelchair on the market is generally heavy to carry, and it is very inconvenient to transfer if long-distance travel is needed, and it is difficult to transport. The main weight of the electric wheelchair is the driving motor rear wheel (hereinafter referred to as motor wheel) with a high weight ratio. If the motor wheel cannot be quickly disassembled, it can only be transferred with the wheelchair body, so the motor wheel needs to be designed as a detachable structure.

[0003] However, the motor wheel needs to be connected to the controller and battery pack on the wheelchair frame through a power line. If the motor wheel is to be disassembled, the connection between the motor wheel and the controller and battery pack needs to be disconnected first. The existing power line between the motor wheel and the controller and battery pack cannot be disconnected, so it is not convenient to disassemble the motor wheel. Some electric wheelchairs have a wire joint in the middle of the power line, and the motor wheel is connected to the controller and battery pack through the wire joint. This structure needs to disconnect the wire joint first when disassembling, and then disassemble the motor wheel. When installing, the motor wheel needs to be installed first, and then the wire joint needs to be connected. The motor wheel is not convenient to disassemble and assemble. Moreover, the wire joint is easy to disconnect, and needs to be wrapped with adhesive tape to prevent accidental disconnection or loosening. Therefore, when disassembling the motor wheel, the adhesive tape needs to be unwound, making the steps of disassembling and assembling the motor wheel more complicated. SUMMARY

[0004] The purpose of the present application is to provide a quick release structure of motor rear wheel of electric wheelchair, which can disconnect or connect the connection between the motor wheel and the controller and battery pack when disassembling and assembling the motor wheel, and quickly disassemble and assemble the motor wheel for convenient transportation.

[0005] To achieve the above purpose, the solution of the present application is a quick release structure of motor rear wheel of electric wheelchair, which comprises a motor wheel, a motor shaft, a frame, a mounting sleeve, a limiting mechanism, a male plug and a female plug.

[0006] The mounting sleeve is arranged on the frame, the male plug connected to the controller and battery pack is arranged at the left end of the mounting sleeve, the limiting mechanism is arranged at the middle part of the mounting sleeve, the right end of the motor shaft is connected to the motor wheel, and the female plug connected to the motor wheel is arranged at the left end of the motor shaft.

[0007] When the motor shaft is inserted into the mounting sleeve from the right end of the mounting sleeve, the male plug and the female plug are connected to supply power, 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 plug and the female plug are disconnected.

[0008] Further, the limiting mechanism comprises a limiting pin, a spring and a pin sleeve, the mounting sleeve is radially provided with a mounting hole, the pin sleeve is fixed on the mounting hole, the limiting pin is movably arranged in the pin sleeve, and the spring is arranged on the limiting pin and connected to the pin sleeve and the limiting pin at both ends, and the motor shaft is radially provided with a positioning hole, and when the motor shaft is inserted into the mounting sleeve, the limiting pin is inserted into the positioning hole.

[0009] Further, the bottom of the pin sleeve is fixed with the mounting hole, the top of the pin sleeve is provided with a slot, the top of the limiting pin is provided with an end cap, the bottom of the end cap is protrudingly provided with a plug, and when the bottom of the limiting pin is inserted into the positioning hole, the plug cooperates with the slot, and after the limiting pin is pulled out and the limiting pin is separated from the positioning hole, the end cap is rotated to rotate the limiting pin to the state that the plug is misaligned with the slot, and the plug abuts against the top of the pin sleeve.

[0010] Further, the outer periphery of the motor shaft is arranged in a conical cylindrical shape, the outer diameter of the left end of the motor shaft is smaller than that of the right end, and the inside of the mounting sleeve is provided with a conical inner hole matched with the motor shaft.

[0011] Further, the outer periphery of the motor shaft is provided with a first limiting plane, the inner periphery 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.

[0012] Further, the left end of the motor shaft is provided with a round corner, and when the motor shaft is inserted into the mounting sleeve, the round corner pushes the limiting pin to move upwardly to retract into the pin sleeve.

[0013] Further, the outer periphery of the motor shaft is provided with a shaft sleeve, the female plug is arranged at the left end of the shaft sleeve, and the shaft sleeve is radially provided with a limiting hole for inserting the pin sleeve.

[0014] Further, the shaft sleeve is a conical sleeve, the outer diameter of the left end of the shaft sleeve is smaller than that of the right end, and the inside of the mounting sleeve is provided with a conical inner hole matched with the conical sleeve.

[0015] Further, the outer periphery of the shaft sleeve is provided with a first limiting plane, the inner periphery 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 shaft sleeve.

[0016] Further, the left end of the shaft sleeve is provided with a round corner, when the shaft sleeve is inserted into the mounting sleeve, the round corner pushes the limiting pin upward to retract into the pin sleeve.

[0017] After the above scheme is adopted, the application has the following beneficial effects:

[0018] The mounting sleeve is arranged on the frame, the left end of the mounting sleeve is provided with a male plug connected with the controller and the battery pack, the left end of the motor shaft is provided with a female plug connected with the motor wheel, when the motor wheel is installed, only the left end of the motor shaft is inserted into the right end of the mounting sleeve until the male plug and the female plug are connected and powered, then the limiting mechanism cooperates with the motor shaft to limit the circumferential rotation and axial movement of the motor shaft, and the installation of the motor wheel is completed; when the motor wheel is disassembled, only the limiting mechanism is unlocked, and then the motor shaft is pulled out of the mounting sleeve, and the disassembly of the motor wheel is completed.

[0019] Therefore, the motor shaft is inserted into the mounting sleeve and locked by the limiting mechanism to complete the installation of the motor wheel, the limiting mechanism is unlocked, and the motor shaft is pulled out of the mounting sleeve to disassemble the motor wheel, and at the same time when the motor shaft is installed, the male plug and the female plug are connected to communicate, so that the motor wheel is connected with the controller and the battery pack on the frame; at the same time when the motor shaft is pulled out, the connection between the male plug and the female plug is disconnected, so that the connection between the motor wheel and the controller and the battery pack can be disconnected or connected at the same time when the motor wheel is disassembled, so that the motor wheel is quickly, simply and conveniently disassembled and transported. Moreover, the limiting mechanism axially limits the motor shaft, the motor shaft cannot be pulled out of the mounting sleeve, and the connection between the male plug and the female plug cannot be disconnected, so that the structure for reinforcing the connection between the male plug and the female plug is not additionally arranged, and the problem of inconvenient disassembly of the motor wheel is solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a schematic diagram of the overall structure of the embodiment one of the application;

[0021] Fig. 2 is a sectional view of the A-A direction in Fig. 1;

[0022] Fig. 3 is an enlarged view of the C part in Fig. 2;

[0023] Fig. 4 is a sectional view of the B-B direction in Fig. 2;

[0024] Fig. 5 is an exploded view of the parts of the embodiment one of the application (omitting the frame);

[0025] Fig. 6 is an exploded view of the parts of the limiting mechanism of the embodiment one of the application;

[0026] Fig. 7 is a schematic diagram of the structure of the shaft sleeve of the embodiment one of the application;

[0027] Figure 8 is a schematic diagram of the structure of the male plug of the embodiment one of the application;

[0028] Figure 9 is a schematic diagram of the structure of the female plug of the embodiment one of the application;

[0029] Figure 10 is an exploded view of the embodiment two of the application;

[0030] Figure 11 is a sectional view of the embodiment two of the application;

[0031] Figure 12 is an enlarged view of the part D in Figure 11 of the application.

[0032] Label explanation:

[0033] 1, motor wheel; 11, motor shaft; 2, frame; 3, shaft sleeve; 31, positioning hole; 32, round corner; 33, first limiting plane; 4, mounting sleeve; 41, mounting hole; 42, tapered inner hole; 43, second limiting plane; 5, limiting mechanism; 51, limiting bolt; 52, spring; 53, bolt sleeve; 531, insertion slot; 54, end cap; 541, insertion block; 6, male plug; 61, pin; 62, insertion slot; 7, female plug; 71, insertion hole; 8, screw; 9, gasket. Embodiment of the application

[0034] The application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "middle", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] Embodiment one:

[0037] As shown in Figures 1-9, the present embodiment provides a quick release structure for the rear wheel of an electric wheelchair motor, comprising a motor wheel 1, a frame 2, a shaft sleeve 3, a mounting sleeve 4, a limiting mechanism 5, a male plug 6 and a female plug 7; the mounting sleeve 4 is arranged on the frame 2, the frame 2 is provided with a controller and a battery pack (not shown in the figure), the left end of the mounting sleeve 4 is provided with the male plug 6 connected to the controller and the battery pack, 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 shaft sleeve 3; the right end of the shaft sleeve 3 is fixedly sleeved on the motor shaft 11 of the motor wheel 1, and the left end of the shaft sleeve 3 is provided with the female plug 7 connected to the motor wheel 1, and the working principle of disassembling and assembling the motor wheel 1 is as follows:

[0038] When installing the motor wheel 1, the left end of the shaft sleeve 3 is inserted from the right end of the mounting sleeve 4 until the male plug 6 and the female plug 7 are connected to power the motor wheel 1, and then the limiting mechanism 5 cooperates with the shaft sleeve 3 to limit the circumferential rotation and axial movement of the shaft sleeve 3, the motor wheel 1 can rotate relative to the motor shaft 11 to drive the wheelchair, and the installation of the motor wheel 1 is completed; when disassembling the motor wheel 1, first unlock the limiting mechanism 5, then pull out the shaft sleeve 3 from the mounting sleeve 4, and the disassembly of the motor wheel 1 is completed.

[0039] Therefore, in this embodiment, the shaft sleeve 3 is inserted into the mounting sleeve 4 and locked by the limiting mechanism 5 to complete the installation of the motor wheel 1, and the motor wheel 1 can be disassembled by unlocking the limiting mechanism 5 and pulling out the shaft sleeve 3 from the mounting sleeve 4. Moreover, the male plug 6 and the female plug 7 are connected when the shaft sleeve 3 is installed, so that the motor wheel 1 is connected with the controller and the battery pack on the frame 2. When the shaft sleeve 3 is pulled out, the connection between the male plug 6 and the female plug 7 is disconnected. Therefore, the connection between the motor wheel 1 and the controller and the battery pack can be disconnected or connected when the motor wheel 1 is disassembled or assembled, so that the motor wheel 1 can be quickly, simply and conveniently disassembled or assembled, and transportation is facilitated. Moreover, the shaft sleeve 3 is axially limited by the limiting mechanism 5, so that the shaft sleeve 3 cannot be pulled out of the mounting sleeve 4, and the connection between the male plug 6 and the female plug 7 cannot be disconnected. Therefore, it is not necessary to additionally set a structure for reinforcing the connection between the male plug 6 and the female plug 7, and the problem of inconvenient disassembly and assembly of the motor wheel 1 is solved.

[0040] The inner holes of the shaft sleeve 3 and the mounting sleeve 4 can be cylindrical, the diameter of the left end of the shaft sleeve 3 is equivalent to the diameter of the hole at the right end of the mounting sleeve 4, and the shaft sleeve 3 needs to be carefully aligned with the mounting sleeve 4 before being inserted into the mounting sleeve 4 during installation, otherwise the shaft sleeve 3 and the mounting sleeve 4 can be easily worn. In this embodiment, the shaft sleeve 3 is preferably a tapered sleeve, the outer diameter of the left end of the shaft sleeve 3 is smaller than the outer diameter of the right end of the shaft sleeve 3, and the diameter of the shaft sleeve 3 gradually increases from the left end to the right end. The inside of the mounting sleeve 4 is provided with a tapered inner hole 42 matched with the tapered sleeve, that is, the diameter of the right end of the tapered inner hole 42 is larger than the diameter of the left end of the tapered inner hole 42, and the diameter of the right end of the tapered inner hole 42 is larger than the outer diameter of the left end of the shaft sleeve 3. Therefore, during installation, the left end of the shaft sleeve 3 can be easily aligned with the tapered inner hole 42 and inserted into the tapered inner hole 42, and the shaft sleeve 3 and the mounting sleeve 4 cannot be worn.

[0041] Further, the limiting mechanism 5 can be a latch limiting mechanism 5 or a buckle structure buckled with the shaft sleeve 3, or a screw or bolt threaded with the shaft sleeve 3, for example, a through hole is formed on the mounting sleeve 4, and a threaded hole corresponding to the through hole is formed on the shaft sleeve 3. After the shaft sleeve 3 is installed in place, the screw is threaded through the threaded hole to lock the shaft sleeve 3. In this embodiment, the spring 52 pin structure is preferably used to lock the shaft sleeve 3.

[0042] Specifically, with reference to Figs. 2-6, the limiting mechanism 5 comprises a limiting pin 51, a spring 52, and a pin sleeve 53. The mounting sleeve 4 is provided with a mounting hole 41 in the radial direction. The pin sleeve 53 is fixed on the mounting hole 41, and the interior of the pin sleeve 53 is in vertical communication with the interior 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 the two ends of the spring 52 are connected with the pin sleeve 53 and the limiting pin 51 respectively. A step can be arranged at the top end of the interior of the pin sleeve 53. One end of the spring 52 can abut against the step, and the other end is fixed with the limiting pin 51. The shaft sleeve 3 is provided with a positioning hole 31 in the radial direction. When the shaft sleeve 3 is inserted into the mounting sleeve 4 and the male plug 6 and the female plug 7 are connected for power supply, the limiting pin 51 is pushed by the spring 52 for reset, and the bottom part of the limiting pin 51 is inserted into the positioning hole 31 to limit the axial movement and the circumferential rotation of the shaft sleeve 3. When the limiting pin 51 is pulled out and the spring 52 is compressed, the bottom part of the limiting pin 51 is separated from the positioning hole 31 to unlock the shaft sleeve 3. Then, the shaft sleeve 3 can be pulled out from the mounting sleeve 4 to realize the disassembly of the motor wheel 1. The spring 52 pin structure is adopted to lock or unlock the shaft sleeve 3, which is convenient to operate and makes the disassembly and assembly of the motor wheel 1 more rapid and simple.

[0043] With reference to Fig. 6, the bottom part of the pin sleeve 53 is fixed with the mounting hole 41. The top part of the pin sleeve 53 is provided with a slot 531. The top part of the limiting pin 51 is provided with an end cap 54. The bottom part of the end cap 54 is provided with an insertion block 541. When the bottom part of the limiting pin 51 is inserted into the positioning hole 31, the insertion block 541 is inserted into the slot 531 and matched with the slot 531. When the limiting pin 51 is pulled out and separated from the positioning hole 31, the insertion block 541 is separated from the slot 531. Then, the end cap 54 is rotated to rotate the limiting pin 51 to the position where the insertion block 541 is misaligned with the slot 531. The insertion block 541 abuts against the top part of the pin sleeve 53. At this time, the spring 52 is compressed, and the limiting pin 51 is fixed at the position of being retracted into the pin sleeve 53. Then, the shaft sleeve 3 can be inserted into the mounting sleeve 4. After the shaft sleeve 3 is installed in place, the end cap 54 is rotated to align the insertion block 541 with the slot 531. After the end cap 54 is loosened, the limiting pin 51 is inserted into the positioning hole 31 by the reset of the spring 52, and the insertion block 541 is also inserted into the slot 531. This structure can stably maintain the limiting pin 51 in the retracted state. During the process of inserting the shaft sleeve 3 into the mounting sleeve 4, it is not necessary to hold the limiting pin 51 with hand to maintain it in the retracted position, and it is easier to insert the shaft sleeve 3 into the mounting sleeve 4.

[0044] Further, the insertion block 541 is symmetrically provided with two insertion blocks, and the slot 531 is correspondingly provided with two slots, so that the matching between the insertion block 541 and the top end of the pin sleeve 53 is more stable, and the bottom end of the limiting pin 51 is not easy to protrude out of the pin sleeve 53.

[0045] Referring to Fig. 7, in the embodiment, a round corner 32 is arranged at the left end of the shaft sleeve 3. When the shaft sleeve 3 is inserted into the mounting sleeve 4, the round corner 32 pushes the limiting pin 51 to move. If the limiting pin 51 is above the shaft sleeve 3, the limiting pin 51 is pushed to move upward, the bottom of the limiting 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, the limiting pin 51 is pushed into the positioning hole 31 by the spring 52, so that when the shaft sleeve 3 is installed, the limiting pin does not need to be pulled into the pin sleeve 53 by hand, and the limiting pin does not need to be maintained in this position. The motor wheel 1 can be disassembled by inserting or pulling out the shaft sleeve 3 from the mounting sleeve 4, without manually triggering the limiting mechanism 5, so that the motor wheel 1 is more convenient to disassemble. It should be noted that the outer diameter of the female plug 7 should be smaller than the outer diameter of the left end of the shaft sleeve 3, and the female plug 7 does not contact the limiting pin 51 when the shaft sleeve 3 is inserted into the mounting sleeve 4.

[0046] Referring to Figs. 4, 5 and 7, the right end of the shaft sleeve 3 is connected and fixed with the motor shaft 11 by the screw 8. Specifically, a through hole is arranged on the shaft sleeve 3, and a threaded hole is arranged on the motor shaft 11, and the screw 8 is screwed through the through hole and the threaded hole to fix the shaft sleeve 3 and the motor shaft 11. When the wheelchair is running, the motor shaft 11 is fixed, and the wheel rotates relative to the motor shaft 11. Since the shaft sleeve 3 and the motor shaft 11 are fixed, the shaft sleeve 3 cannot rotate circumferentially. Although the limiting pin 51 can limit the circumferential rotation of the shaft sleeve 3, the torque of the wheelchair during actual running is large, and the limiting pin 51 is easily cut off only by relying on the limiting pin 51 to stop rotation. Therefore, a first limiting plane 33 is arranged on the outer periphery of the shaft sleeve 3, a second limiting plane 43 is arranged on the inner periphery of the mounting sleeve 4, and the first limiting plane 33 and the second limiting plane 43 cooperate to limit the circumferential rotation of the shaft sleeve 3, thereby preventing the limiting pin 51 from being cut off. Moreover, the first limiting plane 33 and the second limiting plane 43 also have a foolproof function. Specifically, the connection direction of the male plug 6 and the female plug 7 is unique, and the mounting hole 41 and the limiting hole also need to be in the same radial position. Therefore, the shaft sleeve 3 can only be inserted into the mounting sleeve 4 in one direction. When installed, the first limiting plane 33 and the second limiting plane 43 are aligned to determine the position of the shaft sleeve 3 to be inserted, so that after the shaft sleeve 3 is inserted, the male plug 6 and the female plug 7 can be connected smoothly, the mounting hole 41 and the positioning hole 31 can be aligned, and the circumferential position of the shaft sleeve 3 is easy to find for the user to install.

[0047] With reference to Figs. 3, 8 and 9, the mounting sleeve 4 is arranged at the bottom of the frame 2, the left end of the male plug 6 is exposed to the mounting sleeve 4 and is connected to the controller and the battery pack through the wire, the right end of the male plug 6 is provided with a pin 61, the right end of the female plug 7 is arranged inside the shaft sleeve 3 and is connected to the motor wheel 1 through the wire, the wire extends inside the shaft sleeve 3 and the motor shaft 11 to the motor wheel 1, the left end of the female plug 7 is provided with a socket 71 matched with the pin 61, after the shaft sleeve 3 is inserted into place, the pin 61 of the male plug 6 is inserted into the socket 71 of the female plug 7 to connect the motor wheel 1 with the controller and the battery pack.

[0048] In addition, the right end of the male plug 6 is internally provided with a plug-in groove 62, the pin 61 is arranged in the plug-in groove 62, when the shaft sleeve 3 is inserted into the mounting sleeve 4, the left end of the female plug 7 is inserted into the plug-in groove 62, so that the pin 61 is easily inserted into the socket 71, and the plug-in groove 62 also has the function of protecting the pin 61.

[0049] As shown in Figs. 3 and 5, the gasket 9 with a diameter larger than the shaft sleeve is arranged between the motor wheel 1 and the motor shaft 44, when the male plug 6 is connected and matched with the female plug 7, the right end of the mounting sleeve 4 is just abutted and positioned with the gasket 9, the gasket 9 can adjust and compensate the error between the mounting sleeve 4 and the shaft sleeve 3, and positioning is realized when the motor wheel 1 is mounted.

[0050] The right end of the male plug 6 and the left end of the mounting sleeve 4 can be provided with threads, so that the right end of the male plug 6 is threadedly connected with the left end of the mounting sleeve 4, which facilitates the dismounting of the male plug 6, and the right end of the female plug 7 and the left end of the shaft sleeve 3 can also be provided with threads, so that the right end of the female plug 7 is threadedly connected with the left end of the shaft sleeve 3, which facilitates the dismounting of the female plug 7. In addition, the male plug 6 is exposed and easy to fall off, in addition to the threaded connection, as shown in Fig. 5, a screw can be additionally arranged to lock the male plug 6, and screw mounting holes can be radially arranged on the male plug 6 and the mounting sleeve 4 for mounting; as shown in Fig. 10, axial screw mounting holes can also be arranged on the male plug 6 and the left end of the mounting sleeve 4 for mounting.

[0051] In the second embodiment:

[0052] With reference to Figs. 10-12, the difference between the second embodiment and the first embodiment is that the second embodiment does not arrange the shaft sleeve 3, the female plug 7 is directly arranged at the left end of the motor shaft 11, the right end of the motor shaft 11 is connected with the motor wheel 1, when the motor wheel 1 is mounted, the motor shaft 11 is directly inserted into the mounting sleeve 4, until the male plug 6 is connected with the female plug 7 to be electrified, then the limiting mechanism 5 limits the circumferential rotation and axial movement of the motor shaft 11, when dismounting, the limiting mechanism 5 is unlocked, the motor shaft 11 is pulled out from the mounting sleeve 4, and the dismounting is completed.

[0053] Specifically, the outer periphery of the motor shaft 11 is provided with a first limiting plane 33 matched with a second limiting plane 43 of the inner periphery of the mounting sleeve 4, the outer periphery of the motor shaft 11 is provided in a tapered cylindrical shape, 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 is directly matched with the tapered inner hole in the mounting sleeve 4. Moreover, a positioning hole 31 is radially provided on the motor shaft 11 and directly matched with the limiting pin 51, and a round corner can also be provided on the left end of the motor shaft 11, when the motor shaft is inserted into the mounting sleeve 4, the round corner 32 will push the limiting pin 51 to move, so as to automatically unlock and lock the limiting pin 51. The wire female plug 7 can also be directly screwed with the left end of the motor shaft 11.

[0054] The above merely describes the preferred embodiments of the present application, and is not intended to limit the design of the present application. Any equivalent changes made according to the key design of the present application shall fall within the protection scope of the present application.

Claims

1. A quick-release structure for the rear wheelchair motor of an electric wheelchair, characterized in that: The motor wheel, the motor shaft, the frame, the mounting sleeve, the limiting mechanism, the male plug and the female plug are included. The mounting sleeve is arranged on the frame, the male plug connected with the controller and the battery pack is arranged on the left end of the mounting sleeve, the limiting mechanism is arranged on the middle part 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 the 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 male plug and the female plug are connected for power supply, and the limiting mechanism cooperates with the motor shaft to limit the circumferential rotation and axial movement of the motor shaft.

2. The quick release structure of the motor rear wheel of the electric wheelchair according to claim 1, characterized in that: When the limiting mechanism is released and the motor shaft is pulled out of the mounting sleeve, the male plug and the female plug are disconnected.

3. The quick release structure of the motor rear wheel of the electrically powered wheelchair according to claim 2, characterized in that: The limiting mechanism includes a limiting bolt, a spring and a bolt sleeve, the mounting sleeve is provided with a mounting hole in the radial direction, the bolt sleeve is fixed on the mounting hole, the limiting bolt is movably arranged in the bolt sleeve, and the spring is arranged on the limiting bolt and connected with the bolt sleeve and the limiting bolt.

4. A quick release structure of a motor rear wheel of an electrically powered wheelchair according to any one of claims 1-3, characterized in that: The bottom of the bolt sleeve is fixed with the mounting hole, the top of the bolt sleeve is provided with a slot, the top of the limiting bolt is provided with an end cap, the bottom of the end cap is provided with a plug, and when the bottom of the limiting bolt is inserted into the positioning hole, the plug is matched with the slot.

5. A quick release structure of a motor rear wheel of an electrically powered wheelchair according to any one of claims 1-3, characterized in that: The outer periphery of the motor shaft is arranged in a conical cylindrical shape, the outer diameter of the left end of the motor shaft is smaller than that of the right end, and the inside of the mounting sleeve is provided with a conical inner hole matched with the motor shaft.

6. The quick release structure of the motor rear wheel of the electrically powered wheelchair according to claim 2 or 3, characterized in that: The outer periphery of the motor shaft is provided with a first limiting plane, the inner periphery of the mounting sleeve is provided with a second limiting plane, and the first limiting plane and the second limiting plane are matched to limit the circumferential rotation of the motor shaft.

7. The quick release structure of the motor rear wheel of the electrically powered wheelchair according to claim 2 or 3, characterized in that: The left end of the motor shaft is provided with a round corner, and when the motor shaft is inserted into the mounting sleeve, the round corner pushes the limiting bolt to move upward to retract into the bolt sleeve.

8. The quick release structure of the motor rear wheel of the electric wheelchair according to claim 7, characterized in that: The outer periphery of the motor shaft is provided with a shaft sleeve, the female plug is arranged on the left end of the shaft sleeve, and the shaft sleeve is provided with a limiting hole in the radial direction for the bolt sleeve to be inserted.

9. The quick release structure of the motor rear wheel of the electric wheelchair vehicle as claimed in claim 7, wherein: The shaft sleeve is a conical sleeve, the outer diameter of the left end of the shaft sleeve is smaller than that of the right end, and the inside of the mounting sleeve is provided with a conical inner hole matched with the conical sleeve.

10. The quick release structure of the motor rear wheel of the electric wheelchair vehicle as claimed in claim 7, wherein: The outer periphery of the shaft sleeve is provided with a first limiting plane, the inner periphery of the mounting sleeve is provided with a second limiting plane, and the first limiting plane and the second limiting plane are matched to limit the circumferential rotation of the shaft sleeve. The left end of the shaft sleeve is provided with a round corner, and when the shaft sleeve is inserted into the mounting sleeve, the round corner pushes the limiting bolt to move upward to retract into the bolt sleeve.

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