Electric wheelchair with motor wheels capable of being quickly disassembled

Abstract

The electric wheelchair comprises a wheelchair frame, the motor wheels, a quick release assembly and a control assembly, the motor wheels are detachably arranged at the bottom of the wheelchair frame through the quick release assembly, and the control assembly is arranged on the wheelchair frame, electrically connected with the motor wheels and used for controlling the motor wheels to rotate; the quick release assembly comprises positioning sleeves, a sliding piece and a limiting piece, the motor wheel is provided with a motor wheel shaft, the motor wheel shaft is slidably arranged in the positioning sleeves in a penetrating mode, the two positioning sleeves are arranged on the left side and the right side of the bottom of the wheelchair frame respectively, and the sliding piece is axially arranged on the positioning sleeves in a sliding mode; the sliding part axially slides to be matched with the limiting part to radially slide to realize locking and unlocking; during locking, the sliding piece pushes the limiting piece to be exposed out of the limiting through hole and embedded into the limiting groove, the limiting piece is located in the limiting through hole and the limiting groove at the same time, the motor axle slides relative to the positioning sleeve during unlocking, and the limiting piece retreats from the limiting groove. According to the wheelchair, the wheels can be quickly assembled and disassembled on the wheelchair frame, and later maintenance is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of electric wheelchairs, and particularly to an electric wheelchair vehicle with motor wheels that can be quickly disassembled. Background Art

[0002] An electric wheelchair vehicle is a modern means of transportation that is upgraded through design and transformation on the basis of a traditional manual wheelchair by superimposing core components such as a high-performance power drive device, an intelligent control device, and a high-performance battery. The emergence of electric wheelchairs has greatly improved the travel experience of people with limited mobility, enabling them to move more independently, safely, and comfortably and enjoy a more free and convenient life.

[0003] For existing electric wheelchair vehicles, most of their wheels are fixed to the wheelchair frame by welding, resulting in a cumbersome process for wheel loading and unloading. For existing electric wheelchair vehicles with detachable wheels, the disassembly structure of the wheels is relatively complex, which affects later maintenance and reduces the user experience. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric wheelchair vehicle with motor wheels that can be quickly disassembled, enabling the motor wheels to be quickly loaded and unloaded on the wheelchair frame.

[0005] To achieve the above object, the solution of the present invention is: an electric wheelchair vehicle with motor wheels that can be quickly disassembled, including a wheelchair frame, motor wheels, a quick-disassembly component, and a control component. The motor wheels are detachably arranged at the bottom of the wheelchair frame through the quick-disassembly component, and the control component is arranged on the wheelchair frame and electrically connected to the motor wheels for controlling the rotation of the motor wheels;

[0006] The quick-disassembly component includes a positioning sleeve, a sliding member, and a limiting member. The motor wheel is provided with a motor wheel shaft, and the motor wheel shaft slidably passes through the positioning sleeve. Two positioning sleeves are respectively arranged on the left and right sides of the bottom of the wheelchair frame, and the sliding member is axially slidably arranged on the positioning sleeve;

[0007] A plurality of limiting grooves are formed on the motor wheel shaft, and a plurality of limiting through holes are radially formed in the positioning sleeve at positions matching the limiting grooves. A plurality of limiting members are radially slidably arranged in the plurality of limiting through holes, and the size of one end of the limiting through hole close to the motor wheel shaft is smaller than the size of the other end of the limiting through hole close to the sliding member. The sliding member axially slides on the positioning sleeve and cooperates with the radial sliding of the limiting member to achieve locking and unlocking between the positioning sleeve and the motor wheel shaft;

[0008] During locking, the sliding member pushes the limiting member out of the limiting through hole and into the limiting groove, and the limiting member is simultaneously located in the limiting through hole and the limiting groove. During unlocking, the motor wheel shaft slides relative to the positioning sleeve, and the limiting member exits the limiting groove.

[0009] In a preferred embodiment, the control component includes a drive box, a drive switch, a male plug and a female plug. The drive switch, the male plug and the female plug are electrically connected to the drive box respectively. The drive box is arranged on the wheelchair frame, the drive switch is arranged on the armrest on the top of the wheelchair frame, the female plug is arranged in the motor wheel axle, and the male plug is arranged on the female plug. The drive switch is used to conduct the male plug and the female plug through the drive box to control the start and stop of the motor wheel.

[0010] In a preferred embodiment, the sliding member is a limiting sleeve, one end of the positioning sleeve is fixed on the wheelchair frame, and the other end of the positioning sleeve is axially slidably provided with the limiting sleeve, the inner wall of one end of the limiting sleeve is radially protruded with a first flange, the first flange abuts against the outer periphery of the positioning sleeve to form a limiting portion, and the first flange is provided with a first inclined surface facing the positioning sleeve at the end close to the wheelchair frame, the first inclined surface and the inner wall of the limiting sleeve form a yield portion, the limiting portion is used to push the limiting member when locked, and the limiting member is located in the yield portion when unlocked.

[0011] The preferred embodiment also includes an elastic member, and a second flange is provided at the other end of the positioning sleeve, and the radial length of the second flange is equal to the radial length of the first flange. The inner wall of the other end of the limiting sleeve abuts against the second flange to form a sliding cavity, and the elastic member is placed in the sliding cavity, one end of the elastic member abuts against the first flange, and the other end of the elastic member abuts against the second flange.

[0012] Preferably, the elastic member is a compression spring.

[0013] A preferred solution further comprises a blocking member, which is arranged on the outer periphery of the positioning sleeve, and the elastic member pushes the first inclined surface of the first flange to abut against the blocking member.

[0014] Preferably, the sum of the radial length of the limiting through hole and the radial length of the limiting groove is equal to the radial length of the limiting member.

[0015] In a preferred embodiment, the limiting member is a steel ball, the openings at both ends of the limiting through hole are circular, and the diameter of one end of the limiting through hole close to the motor axle is smaller than the diameter of the other end of the limiting through hole close to the sliding member.

[0016] Preferably, the groove wall of the limiting groove is provided with a second inclined surface facing the limiting member, the motor axle is provided with a diameter reducing section for the power supply motor axle to slide relative to the positioning sleeve, and the diameter reducing section is provided with a third inclined surface.

[0017] The preferred embodiment further includes an installation sleeve, which is fixedly arranged on the left and right sides of the bottom of the wheelchair frame. The outer periphery of the positioning sleeve and the inner periphery of the installation sleeve are provided with fastening threads, and the positioning sleeve and the installation sleeve are locked and fixed by fastening threads.

[0018] After adopting the above solution, the beneficial effects of the present invention are as follows: The present invention enables the motor wheel to be quickly disassembled on the wheelchair frame through the quick-release component, and realizes the rotation control of the motor wheel through the control component. For the quick-release component, when the sliding member pushes the limiting member to expose from the limiting through-hole and embed into the limiting groove, the limiting member is located in both the limiting through-hole and the limiting groove at the same time, realizing the locking between the positioning sleeve and the motor wheel shaft; when the sliding member slides to a position where it no longer pushes the limiting member, the motor wheel shaft slides relative to the positioning sleeve, enabling the limiting member to withdraw from the limiting groove, realizing the unlocking between the positioning sleeve and the motor wheel shaft. The present invention realizes the locking and unlocking of the motor wheel on the wheelchair frame through the quick-release component, with a simple structure and convenient operation, and can achieve the quick loading and unloading of the motor wheel on the wheelchair frame, facilitating later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic diagram showing that the motor wheel is fixedly installed on the positioning sleeve of the wheelchair frame through the motor wheel shaft in an embodiment of the present invention;

[0020] Figure 2 FIG. is a schematic diagram showing the removal of the motor wheel from the positioning sleeve of the wheelchair frame in an embodiment of the present invention;

[0021] Figure 3 FIG. is Figure 2 an enlarged schematic view of part A in FIG.

[0022] Figure 4 FIG. is a schematic diagram showing that the motor wheel is locked on the positioning sleeve through the cooperation of the motor wheel shaft and the limiting sleeve in an embodiment of the present invention;

[0023] Figure 5 FIG. is a schematic diagram showing that the limiting sleeve is slidably arranged on the positioning sleeve in an embodiment of the present invention;

[0024] Figure 6 FIG. is a schematic diagram of another angle showing the removal of the limiting sleeve from the positioning sleeve in an embodiment of the present invention;

[0025] Figure 7 FIG. is a schematic diagram of the motor wheel in an embodiment of the present invention;

[0026] Figure 8 FIG. is a schematic diagram showing the removal of the female plug from the motor wheel shaft in an embodiment of the present invention;

[0027] Figure 9 FIG. is a front sectional view showing that the motor wheel shaft is fixed on the positioning sleeve during locking in an embodiment of the present invention;

[0028] Figure 10 FIG. is Figure 9 an enlarged schematic view of part B in FIG.

[0029] Figure 11is a front cross-sectional view of the motor axle being taken out of the positioning sleeve when unlocking in the embodiment of the present invention;

[0030] Figure 12 yes Figure 11 Enlarged schematic diagram of point C in the middle.

[0031] Description of labels:

[0032] 1. Motor axle; 10. Limiting groove; 100. Second inclined surface; 11. Diameter reduction section; 110. Third inclined surface; 12. First limiting surface; 2. Positioning sleeve; 20. Limiting through hole; 21. Second flange; 22. Second limiting surface; 3. Sliding member; 30. Limiting sleeve; 300. First flange; 301. First inclined surface; 302. Limiting part; 303. Yielding part; 31. Sliding cavity; 4. Limiting member; 40. Steel ball; 5. Elastic member; 50. Compression spring; 6. Blocking member; 60. Steel ring; 71. Mounting sleeve; 72. Hexagonal nut; 80. Wheelchair frame; 81. Motor wheel; 90. Drive box; 91. Drive switch; 92. Female plug; 93. Male plug. DETAILED DESCRIPTION

[0033] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0034] This embodiment provides an electric wheelchair with a quick-detachable axle. Figures 1 to 12 As shown, it includes a wheelchair frame 80, a motor wheel 81, a quick release assembly and a control assembly. The motor wheel 81 is detachably arranged at the bottom of the wheelchair frame 80 through the quick release assembly. The control assembly is arranged on the wheelchair frame 80 and is electrically connected to the motor wheel 81 to control the rotation of the motor wheel 81.

[0035] The quick-release assembly includes a positioning sleeve 2, a sliding member 3 and a stopper 4. The motor wheel 81 is provided with a motor axle 1. The motor axle 1 is slidably inserted into the positioning sleeve 2. The two positioning sleeves 2 are respectively arranged on the left and right sides of the bottom of the wheelchair frame 80. The sliding member 3 is axially slidably arranged on the positioning sleeve 2.

[0036] A plurality of limiting grooves 10 are provided on the motor axle 1, a plurality of limiting through holes 20 are radially provided on the positioning sleeve 2 at positions matching the limiting grooves 10, a plurality of limiting members 4 are radially slidably arranged in the plurality of limiting through holes 20, and the size of one end of the limiting through hole 20 close to the motor axle 1 is smaller than the size of the other end of the limiting through hole 20 close to the sliding member 3, the sliding member 3 axially slides on the positioning sleeve 2 and cooperates with the limiting member 4 radially to realize locking and unlocking between the positioning sleeve 2 and the motor axle 1;

[0037] When locked, the sliding member 3 pushes the limiting member 4 to expose from the limiting through-hole 20 and embed into the limiting groove 10, and the limiting member 4 is located in the limiting through-hole 20 and the limiting groove 10 at the same time. When unlocking, the motor wheel shaft 1 slides relative to the positioning sleeve 2, and the limiting member 4 exits from the limiting groove 10.

[0038] In this embodiment, the quick-release component makes the installation and disassembly process of the motor wheel 81 simple and fast, without the need for additional auxiliary tools, improving the operation convenience and saving a large amount of time cost in the subsequent maintenance process. And the rotation control of the motor wheel 81 can be easily achieved through the control component, so as to realize the automatic driving of the wheelchair. Among them, the bottom of the wheelchair frame 80 is provided with a front wheel and a motor wheel 81, the front end of the bottom of the wheelchair frame 80 is also provided with a pedal for placing the legs, and the rear end of the top of the wheelchair frame 80 is provided with a backrest. This is the structural setting of the existing electric wheelchair and will not be elaborated here.

[0039] For the quick-release component, when the sliding member 3 pushes the limiting member 4 to expose from the limiting through-hole 20 and embed into the limiting groove 10, a firm locking relationship is formed between the motor wheel shaft 1 and the positioning sleeve 2, ensuring the stability and safety during driving and reducing the safety hazards caused by the loosening or falling off of the motor wheel 81. In addition, the size of one end of the limiting through-hole 20 close to the motor wheel shaft 1 is smaller than the size of the other end of the limiting through-hole 20 close to the sliding member 3. On the one hand, it ensures that the limiting member 4 can expose from the limiting through-hole 20 and embed into the limiting groove 10 of the motor wheel shaft 1, and on the other hand, it can also prevent the limiting member 4 from falling from the limiting through-hole 20 into the shaft hole of the positioning through-hole, facilitating the installation of the limiting member 4 in the limiting through-hole 20 and also being beneficial to the later replacement of the limiting member 4. The structure is simple and the design is ingenious.

[0040] As Figures 1 to 4 、 Figure 6 、 Figure 7 shown, the control component includes a drive box 90, a drive switch 91, a male plug 93 and a female plug 92. The drive switch 91, the male plug 93 and the female plug 92 are respectively electrically connected to the drive box 90. The drive box 90 is arranged on the wheelchair frame 80, the drive switch 91 is arranged on the armrest at the top of the wheelchair frame 80, the female plug 92 is arranged in the motor wheel shaft 1, the male plug 93 is cooperatively arranged on the female plug 92, and the drive switch 91 is used to conduct the male plug 93 and the female plug 92 through the drive box 90 to control the start and stop of the motor wheel 81.

[0041] The drive switch 91 of this embodiment is arranged on the handrail at the top of the wheelchair frame 80, so that the user can easily reach and operate it, which improves the convenience of operation. Of course, the control switch can be set to meet the start, acceleration, deceleration or stop of the motor wheel 81, but it is not limited to this. The drive box 90 of this embodiment is arranged on the right side of the wheelchair frame 80, but it is not limited to this, and the size of the motor wheel 81 is larger than the size of the front wheel, which is conducive to ensuring stability during driving.

[0042] Specifically, the motor axle 1 of this embodiment adopts a hollow design, and the interior of the motor axle 1 is used to install the female plug 92, and the male plug 93 is arranged on the female plug 92 in cooperation, and the male plug 93 and the female plug 92 are connected through the driving box 90 to realize the rotation of the motor wheel 81. Figure 7 and Figure 8 As shown, the motor axle 1 is provided with a first limiting surface 12 matching with the female plug 92, which can ensure that the female plug 92 does not idle in the motor axle 1, and has a simple structure. In order to further fix the female plug 92, fasteners can also be used to lock and fix the female plug 92 in the motor axle 1. For example, a threaded blind hole is provided on the female plug 92, a through hole is provided on the first limiting surface 12 of the motor axle 1, and a bolt is passed through the through hole and matched with the threaded blind hole to achieve locking and fixing, but it is not limited to this. In addition, the positioning sleeve 2 is also provided with a second limiting surface 22 matching with the first limiting surface 12, as shown in FIG. Figure 6 As shown, on the one hand, the motor axle 1 is restricted from rotating in the positioning sleeve 2, and on the other hand, it also plays a positioning role, making it more convenient for the sliding member 3 to push the limiting member 4 to be embedded in the limiting groove 10, and the design is ingenious. At the same time, the male plug 93 and the female plug 92 can also be locked and fixed by fasteners such as bolts, but are not limited to this.

[0043] like Figures 3 to 6 , Figures 9 to 12 As shown, the sliding member 3 is a limiting sleeve 30. One end of the positioning sleeve 2 is fixed on the wheelchair frame 80, and the other end of the positioning sleeve 2 is axially slidably provided with the limiting sleeve 30. Figure 10 As shown, the inner wall at one end of the limiting sleeve 30 is radially protruded (the sentence here is radially protruded) with a first flange 300, and the first flange 300 abuts against the outer periphery of the positioning sleeve 2 to form a limiting portion 302. The first flange 300 is provided with a first inclined surface 301 facing the positioning sleeve 2 at the end close to the wheelchair frame 80, and the first inclined surface 301 and the inner wall of the limiting sleeve 30 form a yielding portion 303. When locked, the limiting portion 302 is used to push the limiting member 4, and when unlocked, the limiting member 4 is located in the yielding portion 303.

[0044] The sliding member 3 of this embodiment adopts a limiting sleeve 30, but is not limited thereto. When the limiting sleeve 30 is slid to lock, the first inclined surface 301 of the first flange 300 first contacts the limiting member 4. Due to the provision of the first inclined surface 301, the limiting sleeve 30 continues to slide, and the limiting member 4 moves radially along the first inclined surface 301 to be exposed from the limiting through hole 20 and embedded in the limiting groove 10 of the motor axle 1. At this time, the first flange 300 is in a position to cover the limiting through hole 20, and the limiting portion 302 of the first flange 300 abuts against the limiting member 4 and continues to push the limiting member 4, so as to achieve the locking between the positioning sleeve 2 and the motor axle 1. Figure 10 When the sliding limiting sleeve 30 is unlocked, the yielding portion 303 of the limiting sleeve 30 is located at the position of the limiting through hole 20, and the motor axle 1 slides relative to the positioning sleeve 2 to push the limiting member 4 to radially move out of the limiting groove 10 in the limiting through hole 20. When the limiting member 4 exits the limiting groove 10, it will contact the first inclined surface 301, so that the limiting member 4 can better move to the yielding portion 303, thereby realizing the unlocking between the positioning sleeve 2 and the motor axle 1. Figure 12 As shown, the structure is simple and the operation is convenient. The first flange 300 of this embodiment is annular in design, but is not limited thereto, which effectively improves the smoothness of the sliding operation and is more stable in structure.

[0045] like Figure 6 , Figure 10 and Figure 12 As shown, it also includes an elastic member 5. The other end of the positioning sleeve 2 is provided with a second flange 21. The radial length of the second flange 21 is equal to the radial length of the first flange 300. The inner wall of the other end of the limiting sleeve 30 abuts against the second flange 21 to form a sliding cavity 31. The elastic member 5 is placed in the sliding cavity 31. One end of the elastic member 5 abuts against the first flange 300, and the other end of the elastic member 5 abuts against the second flange 21.

[0046] In this embodiment, the elastic member 5 is provided so that the limiting portion 302 of the limiting sleeve 30 can continuously push the limiting member 4 in the locked state, ensuring that the limiting member 4 is firmly embedded in the limiting groove 10, thereby improving the stability and safety of the motor wheel 81. At the same time, the elastic force of the elastic member 5 enables the limiting sleeve 30 to slide more smoothly when unlocking, making the operation more convenient. When the sliding member 3 is unlocked, the elastic member 5 is in a compressed state, and the limiting member 4 is no longer restricted by the first flange 300. At this time, the motor wheel shaft 1 slides relative to the positioning sleeve 2, and the limiting member 4 can withdraw from the limiting groove 10, which is simple to operate.

[0047] like Figure 6As shown, the elastic member 5 in this embodiment is a compression spring 50, but it is not limited thereto. The compression spring 50 has stable elastic force characteristics and can provide continuous thrust to the limit sleeve 30 in the locked state, ensuring that the limiting member 4 is firmly embedded in the limit groove 10, thereby improving the stability and safety of the fixation of the motor wheel 81. Of course, in other embodiments, other structures capable of providing elastic thrust can also be adopted according to actual needs.

[0048] As Figure 6 shown, it further includes a blocking member 6. The blocking member 6 is arranged on the outer periphery of the positioning sleeve 2, and the elastic member 5 pushes the first inclined surface 301 of the first flange 300 to abut against the blocking member 6.

[0049] In this embodiment, by arranging the blocking member 6 on the outer periphery of the positioning sleeve 2, it can play a limiting role on the first flange 300, ensuring that the first inclined surface 301 of the first flange 300 abuts against the blocking member 6 in the locked state, and the first flange 300 is in a position covering the limit through hole 20. As Figure 10 shown, it ensures that the limiting portion 302 can abut against the limiting member 4, so that the limiting member 4 is firmly embedded in the limit groove 10.

[0050] As Figure 6 shown, the blocking member 6 is a steel ring 60. Since the sliding member 3 in this embodiment adopts the limit sleeve 30, the blocking member 6 in this embodiment adopts the steel ring 60. The steel ring 60 is fixedly sleeved on the outer periphery of the positioning sleeve 2. When locked, the sliding member 3 pushes and squeezes the limiting member 4 to expose from the limit through hole 20 and embed it in the limit groove 10, and the limiting member 4 is simultaneously located in the limit through hole 20 and the limit groove 10. At this time, the sliding member 3 is blocked by the steel ring 60, ensuring that the limiting portion 302 can abut against the limiting member 4, and the limiting member 4 is firmly embedded in the limit groove 10, with a stable structure. Among them, the steel ring 60 is of a detachable design, which is convenient for loading and unloading. In other embodiments, other blocking structures can also be adopted.

[0051] As Figure 10 and Figure 12 shown, the sum of the radial lengths of the limit through hole 20 and the limit groove 10 in this embodiment is equal to the radial length of the limiting member 4. When the limiting member 4 is completely embedded in the limit groove 10, it can closely fit in the groove, improving the stability during the forming process.

[0052] As Figure 10 and Figure 12As shown, the stopper 4 is a steel ball 40, but it is not limited to this. The steel ball 40 has high hardness and wear resistance, can withstand large pressure and load, and ensure the connection strength. Since the stopper 4 of this embodiment adopts the steel ball 40, the openings at both ends of the stopper through hole 20 are circular, and the diameter of the end of the stopper through hole 20 close to the motor axle 1 is smaller than the diameter of the other end of the stopper through hole 20 close to the sliding member 3, ensuring that the steel ball 40 can be exposed from the stopper through hole 20 and embedded in the stopper groove 10 of the motor axle 1, while also preventing the steel ball 40 from falling from the stopper through hole 20 to the shaft hole of the positioning through hole, the structure is simple and the design is ingenious. The stopper groove 10 of this embodiment is annular in design, but it is not limited to this, which is conducive to processing and manufacturing. In addition, four steel balls 40 are provided in this embodiment, and accordingly, the number of the stopper through holes 20 is four. Of course, in other embodiments, the number and size of the steel balls 40 and the stopper through holes 20 can also be adjusted.

[0053] like Figure 8 , Figure 10 and Figure 12 As shown, the groove wall of the limiting groove 10 is provided with a second inclined surface 100 facing the limiting member 4, the motor axle 1 is provided with a diameter reducing section 11 for the power supply motor axle 1 to slide relative to the positioning sleeve 2, and the diameter reducing section 11 is provided with a third inclined surface 110.

[0054] The second inclined surface 100 of this embodiment can play a guiding role when the limit member 4 is embedded in the limit groove 10. When the limit member 4 needs to be withdrawn, the second inclined surface 100 can also provide a smooth withdrawal path. The structure is simple and the convenience of operation is improved. In addition, the motor axle 1 is provided with a diameter reduction section 11 and a third inclined surface 110. When locking, the motor axle 1 is pushed into the positioning sleeve 2. The diameter reduction section 11 first passes through the limit member 4, and then the third inclined surface 110 contacts the limit member 4 and guides the limit member 4. At this time, the limit member 4 will be exposed from the limit through hole 20 in the yielding portion 303 of the limit sleeve 30. The motor axle 1 is continuously pushed until the limit groove 10 is located at the limit through hole 20. The limit member 4 is pushed by the limit sleeve 30 and embedded in the installation groove to achieve the locking between the positioning sleeve 2 and the motor axle 1. When unlocking, the limiting member 4 falls into the diameter-reducing section 11 under the guidance of the third inclined surface 110 , ensuring that the motor axle 1 can be smoothly removed from the positioning sleeve 2 .

[0055] like Figure 3 As shown, it also includes a mounting sleeve 71, which is fixedly arranged on the left and right sides of the bottom of the wheelchair frame 80. The outer periphery of the positioning sleeve 2 and the inner periphery of the mounting sleeve 71 are provided with fastening threads, and the positioning sleeve 2 and the mounting sleeve 71 are fastened and fixed by fastening threads.

[0056] The fixed connection between the mounting sleeve 71 and the wheelchair frame 80, as well as the locking and fixing of the positioning sleeve 2 and the mounting sleeve 71 by means of the fastening threads in this embodiment, improve the stability of the motor wheel 81 during driving. Specifically, both ends of the mounting sleeve 71 are chamfered, and the chamfer angle of the mounting sleeve 71 near the limiting sleeve 30 is greater than the chamfer angle near the motor wheel 81, so that the user can slide the limiting sleeve 30 more conveniently. In addition, the positioning sleeve 2 is made of reinforced stainless steel material, which can further improve the strength, ensure the stability of the structure, and improve driving safety. In addition, if Figure 3 and Figure 4 As shown, this embodiment further adds a hexagonal nut 72 to the positioning sleeve 2 for reverse locking. At the same time, thread glue is applied between the positioning sleeve 2 and the mounting sleeve 71 to further improve the connection stability between the positioning sleeve 2 and the mounting sleeve 71.

[0057] The usage process of this embodiment is as follows:

[0058] First, the drive box 90 is fixedly set on the right side of the wheelchair frame 80, and the drive switch 91 is fixedly set on the armrest on the right side of the wheelchair frame 80, but is not limited to this. The female plug 92 is set in the motor wheel shaft 1, and the male plug 93 is matched with the female plug 92. The drive switch 91, the male plug 93 and the female plug 92 are electrically connected to the drive box 90 respectively, the mounting sleeve 71 is fixedly welded on the wheelchair frame 80, and the positioning sleeve 2 is connected to the mounting sleeve 71 by threaded matching.

[0059] During installation, the motor axle 1 is pushed into the positioning sleeve 2 while the limiting sleeve 30 is slid until the yielding portion 303 is in the position of the limiting through hole 20. The diameter reduction section 11 of the motor axle 1 first passes through the limiting member 4, and then the third inclined surface 110 contacts the limiting member 4 and guides the limiting member 4. At this time, the limiting member 4 will be exposed from the limiting through hole 20 and guided to the yielding portion 303 of the limiting sleeve 30 through the first inclined surface 301 of the first flange 300. The motor axle 1 is continued to be pushed until the limiting groove 10 is in the position of the limiting through hole 20, and the limiting sleeve 30 is slid in the reverse direction. The limiting member 4 is embedded in the installation groove under the push of the first inclined surface 301, and the limiting portion 302 abuts against the limiting member 4. At this time, the first inclined surface 301 abuts against the blocking member 6, thereby achieving locking between the positioning sleeve 2 and the motor axle 1. Figure 10 shown.

[0060] Similarly, during disassembly, first slide the limiting sleeve 30 until the first inclined surface 301 of the first flange 300 is at the position where the limiting through hole 20 is located, and slide the motor axle 1 relative to the positioning sleeve 2. Figure 12As shown, the limiting member 4 exits the limiting groove 10 under the guidance of the second inclined surface 100 of the limiting groove 10 and emerges from the limiting through hole 20, and moves to the yielding portion 303 of the limiting sleeve 30 through the first inclined surface 301. The motor axle 1 continues to slide, and the limiting member 4 falls into the diameter reduction section 11 under the guidance of the third inclined surface 110, and continues to slide until the motor axle 1 is completely removed from the positioning sleeve 2.

[0061] The directional terms mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0062] The above description is only a preferred embodiment of the present invention and is not a limitation on the design of this case. Any equivalent changes made based on the design key of this case shall fall within the protection scope of this case.

Claims

1. An electric wheelchair with a motor wheel that can be quickly disassembled, characterized in that: It includes a wheelchair frame, a motor wheel, a quick-release assembly and a control assembly, wherein the motor wheel is detachably arranged at the bottom of the wheelchair frame through the quick-release assembly, and the control assembly is arranged on the wheelchair frame and electrically connected to the motor wheel for controlling the rotation of the motor wheel; The quick-release assembly includes a positioning sleeve, a sliding member and a limiting member. The motor wheel is provided with a motor axle, and the motor axle is slidably inserted into the positioning sleeve. The two positioning sleeves are respectively arranged on the left and right sides of the bottom of the wheelchair frame, and the sliding member is axially slidably arranged on the positioning sleeve. A plurality of limit grooves are provided on the motor axle, a plurality of limit through holes are radially provided on the positioning sleeve at positions matching the limit grooves, a plurality of limit members are radially slidably arranged in the plurality of limit through holes, and the size of one end of the limit through hole close to the motor axle is smaller than the size of the other end of the limit through hole close to the sliding member, the sliding member axially slides on the positioning sleeve and cooperates with the radial sliding of the limit member to realize locking and unlocking between the positioning sleeve and the motor axle; When locked, the sliding member pushes the limiting member to come out of the limiting through hole and embed into the limiting groove, and the limiting member is located in the limiting through hole and the limiting groove at the same time. When unlocked, the motor axle slides relative to the positioning sleeve, and the limiting member exits the limiting groove.

2. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 1, characterized in that: The control component includes a drive box, a drive switch, a male plug and a female plug. The drive switch, the male plug and the female plug are electrically connected to the drive box respectively. The drive box is arranged on the wheelchair frame, the drive switch is arranged on the armrest on the top of the wheelchair frame, the female plug is arranged in the motor wheel axle, and the male plug is arranged on the female plug in combination. The drive switch is used to conduct the male plug and the female plug through the drive box to control the start and stop of the motor wheel.

3. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 1, characterized in that: The sliding member is a limiting sleeve, one end of the positioning sleeve is fixed on the wheelchair frame, and the other end of the positioning sleeve is axially slidably provided with the limiting sleeve, the inner wall of one end of the limiting sleeve is radially protruded (the sentence here is radially protruded) with a first flange, the first flange abuts against the outer periphery of the positioning sleeve to form a limiting portion, the first flange is provided with a first inclined surface facing the positioning sleeve at the end close to the wheelchair frame, the first inclined surface and the inner wall of the limiting sleeve form a yielding portion, the limiting portion is used to push the limiting member when locked, and the limiting member is located in the yielding portion when unlocked.

4. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 3, characterized in that: It also includes an elastic part. The other end of the positioning sleeve is provided with a second flange. The radial length of the second flange is equal to the radial length of the first flange. The inner wall of the other end of the limiting sleeve abuts against the second flange to form a sliding cavity. The elastic part is placed in the sliding cavity. One end of the elastic part abuts against the first flange, and the other end of the elastic part abuts against the second flange.

5. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 4, characterized in that: The elastic member is a compression spring.

6. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 4, characterized in that: It also includes a blocking member, which is arranged on the outer periphery of the positioning sleeve, and the elastic member pushes the first inclined surface of the first flange to abut against the blocking member.

7. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 3, characterized in that: The sum of the radial length of the limiting through hole and the radial length of the limiting groove is equal to the radial length of the limiting member.

8. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 7, characterized in that: The limiting member is a steel ball, and the openings at both ends of the limiting through hole are circular. The diameter of one end of the limiting through hole close to the motor axle is smaller than the diameter of the other end of the limiting through hole close to the sliding member.

9. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 7, characterized in that: The groove wall of the limiting groove is provided with a second inclined surface facing the limiting member, the motor axle is provided with a diameter reducing section for the power supply motor axle to slide relative to the positioning sleeve, and the diameter reducing section is provided with a third inclined surface.

10. The electric wheelchair with a motor wheel that can be quickly disassembled according to claim 1, characterized in that: It further includes an installation sleeve which is fixedly arranged on the left and right sides at the bottom of the wheelchair frame. Threaded fasteners are provided on the outer circumference of the positioning sleeve and the inner circumference of the installation sleeve, and the positioning sleeve and the installation sleeve are locked and fixed through the threaded fasteners.

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