Carbon fiber electric wheelchair

Abstract

The utility model discloses a carbon fiber electric wheelchair which comprises a foldable frame made of carbon fiber materials, front wheels are arranged at the lower ends of two front supporting legs of the frame, driving motors are fixedly installed at the lower ends of two rear supporting legs of the frame, and driving wheels are fixedly installed on rotating shafts of the driving motors. A damping mechanism is arranged between the front wheel and the lower end of the front supporting leg and comprises a rotating plate, a mounting bracket, a capped screw rod and a damping spring. The frame is made of the carbon fiber material, so that the weight of the whole vehicle is greatly reduced, and the vehicle is convenient to use and carry; the damping mechanism can be used for damping the front wheels, so that the comfort degree of the electric wheelchair when the electric wheelchair runs on a bumpy road is improved; by arranging the foldable handrail, the handrail can be folded and unfolded conveniently; through the arrangement of the foldable frame, the whole vehicle can be folded and is convenient to store; and through the arrangement of a concave slot, a clamping hole, a convex insertion block, a clamping piece and a second spring, the storage battery shell is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wheelchairs, in particular to a carbon fiber electric wheelchair. Background Art

[0002] A Chinese patent with publication number CN219375233U discloses an electric wheelchair, which includes a bracket assembly, a seat and a battery. The bracket assembly supports the seat, the battery is arranged on the bracket assembly, a controller and a charging assembly are provided on the bracket assembly, and the battery and the controller are electrically connected to supply power to the controller. The charging assembly includes a charging circuit and a first charging port, the charging circuit is electrically connected between the first charging port and the battery, the battery has a second charging port, and the battery is configured to be charged through either the first charging port or the second charging port.

[0003] When the above-mentioned electric wheelchair is in use, no corresponding shock-absorbing measures are provided, which causes the electric wheelchair to vibrate greatly when traveling on a bumpy road, resulting in poor comfort for the passengers; and the frame and armrests do not have a folding function, making them inconvenient to store. Utility Model Content

[0004] The purpose of the utility model is to provide a carbon fiber electric wheelchair, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0006] A carbon fiber electric wheelchair comprises a frame made of carbon fiber material, wherein the lower ends of the two front supporting legs of the frame are both provided with front wheels, the lower ends of the two rear supporting legs of the frame are both fixedly mounted with drive motors, the rotating shaft of the drive motor is fixedly mounted with drive wheels, a shock absorbing mechanism is arranged between the front wheels and the lower ends of the front supporting legs, the shock absorbing mechanism comprises a rotating plate, a mounting bracket, a capped screw and a shock absorbing spring, the lower end of the rotating plate is hinged to one end of the top of the mounting bracket, the interior of the front supporting legs is hollow, the top of the rotating plate is provided with a countersunk hole, the top of the mounting bracket is provided with a waist hole, the capped screw The screw is arranged inside the front supporting leg, and the lower end of the capped screw passes through the bottom of the front supporting leg and passes through the countersunk hole and then passes through the waist hole. A clamping nut is threadedly installed on the capped screw for fixing the rotating plate and the front supporting leg together. The shock-absorbing spring is sleeved on the lower end of the capped screw, and the upper end of the shock-absorbing spring is against the bottom of the upper end of the rotating plate. The lower end of the shock-absorbing spring is pressed on the top of the mounting bracket, and a limiting nut is threadedly installed on the lower end of the capped screw for limiting the capped screw in the waist hole. The front wheel is rotatably mounted on the lower end of the mounting bracket.

[0007] Preferably, an armrest is foldably mounted on the seat cushion of the above-mentioned frame, and the armrest comprises a hollow armrest shell, a connecting ring is fixedly connected to the bottom of the hollow armrest shell, a hinge shaft is fixedly connected to one side of the seat cushion, and the connecting ring is rotatably sleeved on the hinge shaft.

[0008] Preferably, a locking assembly for locking the position of the hollow armrest shell is arranged inside the above-mentioned hollow armrest shell, and the locking assembly includes a button, a limit rod and a first spring, the limit rod is slidably arranged inside the hollow armrest shell, the lower end of the limit rod extends into the interior of the connecting ring, the lower end of the limit rod is fixedly connected to a lower limit block, the first spring is sleeved on the limit rod, the top of the first spring is against the bottom of the partition inside the hollow armrest shell, the bottom of the first spring is pressed on the top of the lower limit block, a plurality of positioning holes are provided on the hinge shaft, the lower end of the limit rod can be inserted into the positioning holes, the upper end of the interior of the hollow armrest shell is fixedly connected to a hinge seat, the upper end of the button is hinged to the hinge seat, and the lower end of the button is connected to the upper end of the limit rod through a steel wire rope.

[0009] Preferably, an upper limit block is fixedly connected to the upper end of the limit rod to prevent the lower end of the limit rod from being withdrawn from the interior of the connecting ring, and the outer diameter of the upper limit block is smaller than the inner diameter of the first spring.

[0010] Preferably, the above-mentioned frame also includes a front cross bar, a connecting frame, a rear cross bar and a backrest frame, the upper ends of the rear support legs and the upper ends of the front support legs located on the same side are hinged by a hinge shaft, one end of the seat cushion is hinged to the hinge shaft, the front cross bar is fixedly connected between the two front support legs, the rear cross bar is fixedly connected between the two rear support legs, the lower end of the backrest frame is arranged in an inverted V shape, one of the branches at the lower end of the backrest frame is hinged to one end of the seat cushion, and the other branch at the lower end of the backrest frame is hinged to the lower end of the rear support leg. The lower end of the backrest frame is fixedly connected to an upper mounting seat in the middle, and the rear cross bar is fixedly connected to a lower mounting seat. The upper mounting seat and the lower mounting seat are connected by a connecting buckle, and a hook is formed at the bottom of the connecting buckle. An upper end of one side of the connecting buckle is fixedly connected to a hinge block, and the hinge block is connected to the upper mounting seat through an upper pin. A lower pin is provided on the lower mounting seat, and the hook is clamped on the lower pin. One end of the connecting frame is hinged to the front cross bar, and the other end of the connecting frame is hinged to the lower end of the backrest frame.

[0011] Preferably, a support frame is fixedly connected to the above-mentioned rear cross bar, a battery holder is fixedly mounted on the support frame, a battery housing is detachably mounted on the battery holder, and a battery for power supply is arranged inside the battery housing.

[0012] Preferably, a concave slot is provided on the above-mentioned battery seat, and a card hole connected to the inner side of the concave slot is provided on one side of the battery seat, a convex plug block is fixedly connected to the surface of the battery shell, and the convex plug block can be inserted into the concave slot, and a clamping piece is slidably installed on the battery shell, and a clamping head is formed at the lower end of the clamping piece, and one end of the clamping head can pass through the convex plug block and then be clamped into the concave slot, and a second spring is provided inside the battery shell, one end of the second spring abuts against one side of the clamping piece, and the other end of the second spring abuts against the pillar inside the battery shell.

[0013] Preferably, a mudguard for shielding the driving wheel is fixedly mounted on the lower end of the rear supporting leg.

[0014] Preferably, a control circuit board for controlling the operating state of the drive motor is fixedly installed inside the above-mentioned hollow armrest shell, and a mounting opening for installing a joystick is opened at one end of the hollow armrest shell, and the joystick is electrically connected to the control circuit board.

[0015] Preferably, a foot pedal is hinged between the two front supporting legs, and when the foot pedal is unfolded, the front cross bar can support the foot pedal.

[0016] The utility model has at least the following beneficial effects: the utility model adopts a frame made of carbon fiber material, which greatly reduces the weight of the whole vehicle and is easy to use and carry; the shock-absorbing mechanism can reduce shock for the front wheel, thereby improving the comfort of the electric wheelchair when traveling on bumpy roads; the foldable armrests can be easily folded and unfolded; the foldable frame can be folded to facilitate storage; the concave slot, the card hole, the convex plug block, the card connector and the second spring can be easily disassembled and assembled to the battery housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the carbon fiber electric wheelchair of the utility model;

[0019] Figure 2 This is one of the partial structural schematic diagrams of the carbon fiber electric wheelchair of the utility model;

[0020] Figure 3 for Figure 2A schematic diagram of the enlarged structure of part A;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the handrail of the utility model;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of the shock absorbing assembly of the utility model;

[0023] Figure 6 It is a partial structural schematic diagram of the shock absorbing assembly of the utility model;

[0024] Figure 7 This is the second schematic diagram of the partial structure of the utility model;

[0025] Figure 8 This is the third schematic diagram of the partial structure of the utility model;

[0026] Fig. 9 This is a schematic diagram of the structure of the battery holder of the utility model;

[0027] Fig.10 It is a structural schematic diagram of the connecting buckle of the utility model;

[0028] Fig.11 It is a structural schematic diagram of the battery housing of the utility model;

[0029] Fig.12 It is a schematic cross-sectional structure diagram of the battery housing and the battery holder of the utility model.

[0030] Description of Figure Numbers:

[0031] 1. Frame; 101. Rear support leg; 1011. Rear cross bar; 10111. Lower mounting seat; 10112. Lower pin; 1012. Support frame; 102. Front support leg; 103. Front cross bar; 104. Connecting frame;

[0032] 2. Armrest; 201. Hollow armrest shell; 202. Articulated seat; 203. Button; 204. Steel wire rope; 205. Limit rod; 206. First spring; 207. Connecting ring; 208. Lower limit block; 209. Upper limit block; 210. Articulated shaft; 211. Positioning hole; 2011. Mounting port; 2012. Control circuit board;

[0033] 3. Seat cushion;

[0034] 4. Backrest frame; 401. Upper mounting seat; 402. Upper pin;

[0035] 5. Foot pedal; 6. Front wheel; 7. Driving wheel;

[0036] 8. shock absorbing mechanism; 801. rotating plate; 8011. countersunk hole; 802. mounting bracket; 8021. waist hole; 803. cap screw; 804. shock absorbing spring; 805. clamping nut; 806. limit nut;

[0037] 9. battery holder; 901. concave slot; 902. card hole;

[0038] 10. Battery housing; 1001. Convex plug;

[0039] 11. Driving motor; 12. Mudguard;

[0040] 13. Connecting buckle; 1301. Articulated block; 1302. Hook

[0041] 14. Snap-on component; 1401. Clip head; 15. Second spring. DETAILED DESCRIPTION

[0042] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0043] Please refer to Figures 1 to 12 As shown, this embodiment provides a carbon fiber electric wheelchair, including a frame 1 made of carbon fiber material, wherein the frame 1 is composed of a rear support leg 101, a front support leg 102, a front cross bar 103, a connecting frame 104, a rear cross bar 1011, a seat cushion 3, a backrest frame 4 and a footrest 5. The carbon fiber frame can effectively reduce the weight of the entire electric wheelchair.

[0044] In this embodiment, the upper end of the rear support leg 101 and the upper end of the front support leg 102 located on the same side are hinged by a hinge shaft, one end of the seat cushion 3 is hinged to the hinge shaft, the front cross bar 103 is fixedly connected between the two front support legs 102, the rear cross bar 1011 is fixedly connected between the two rear support legs 101, the lower end of the backrest frame 4 is arranged in an inverted V shape, one of the branches at the lower end of the backrest frame 4 is hinged to one end of the seat cushion 3, and the other branch at the lower end of the backrest frame 4 is hinged to the lower end of the rear support leg 101, the lower end of the backrest frame 4 is fixedly connected to an upper mounting seat 401 in the middle, the rear cross bar 1011 is fixedly connected to a lower mounting seat 10111, and the upper mounting seat 401 It is connected to the lower mounting seat 10111 through a connecting buckle 13, and a hook 1302 is formed on the bottom of the connecting buckle 13. A hinge block 1301 is fixedly connected to the upper end of one side of the connecting buckle 13. The hinge block 1301 is connected to the upper mounting seat 401 through an upper pin 402. A lower pin 10112 is provided on the lower mounting seat 10111, and the hook 1302 is clamped on the lower pin 10112. One end of the connecting frame 104 is hinged to the front cross bar 103, and the other end of the connecting frame 104 is hinged to the lower end of the backrest frame 4. The foot pedal 5 is hinged between the two front supporting legs 102. When the foot pedal 5 is unfolded, the front cross bar 103 can support the foot pedal 5.

[0045] By adopting the above technical solution, when the frame 1 needs to be folded, it is only necessary to remove the upper pin 402 or the lower pin 10112 to separate the connecting buckle 13 from the upper mounting seat 401 or the lower mounting seat 10111, and then push the upper end of the backrest frame 4 in the direction of the seat cushion 3 to fold the backrest frame 4 toward the seat cushion 3. At the same time, the front supporting leg 102 is driven by the connecting frame 104 to fold in the direction of the rear supporting leg 101, thereby completing the folding work of the entire frame 1. When unfolding, it is only necessary to pull the upper end of the backrest frame 4 to rotate it away from the seat cushion 3 to unfold the frame 1, and then connect the upper mounting seat 401 and the lower mounting seat 10111 through the connecting buckle 13.

[0046] In this embodiment, a driving motor 11 is fixedly installed at the lower end of the two rear supporting legs 101 of the frame 1, a driving wheel 7 is fixedly installed on the rotating shaft of the driving motor 11, and a fender 12 for shielding the driving wheel 7 is fixedly installed at the lower end of the rear supporting leg 101.

[0047] In this embodiment, in order to facilitate the folding of the armrest 2 and further reduce the volume of the entire wheelchair after folding, the armrest 2 is foldably installed on the seat cushion 3 of the frame 1, and the armrest 2 includes a hollow armrest shell 201, and the bottom of the hollow armrest shell 201 is fixedly connected to a connecting ring 207, one side of the seat cushion 3 is fixedly connected to a hinge shaft 210, and the connecting ring 207 is rotatably sleeved on the hinge shaft 210. A locking component for locking the position of the hollow armrest shell 201 is arranged inside the hollow armrest shell 201, and the locking component includes a button 203, a limit rod 205 and a first spring 206. The limit rod 205 is slidably arranged inside the hollow armrest shell 201, and the lower end of the limit rod 205 extends into the interior of the connecting ring 207. The lower end of the limit rod 205 is fixedly connected to a lower limit The first spring 206 is sleeved on the limit rod 205, the top of the first spring 206 is against the bottom of the partition inside the hollow armrest shell 201, and the bottom of the first spring 206 is pressed on the top of the lower limit block 208. A plurality of positioning holes 211 are provided on the hinge shaft 210, and the lower end of the limit rod 205 can be inserted into the positioning hole 211. The upper end of the inner part of the hollow armrest shell 201 is fixedly connected with the hinge seat 202, and the upper end of the button 203 is hinged to the hinge seat 202. The lower end of the button 203 is connected to the upper end of the limit rod 205 through the wire rope 204. The upper end of the limit rod 205 is fixedly connected with an upper limit block 209 for preventing the lower end of the limit rod 205 from being withdrawn from the inside of the connecting ring 207. The outer diameter of the upper limit block 209 is smaller than the inner diameter of the first spring 206.

[0048] By adopting the above technical solution, when the armrest 2 needs to be folded, it is only necessary to squeeze the button 203 upwards, and then pull the limit rod 205 upwards through the wire rope 204, so that the limit rod 205 is pulled out of the positioning hole 211. At this time, the hollow armrest shell 201 is in an unlocked state, and then the hollow armrest shell 201 is folded in the direction of the seat cushion 3, and then the button 203 is released. When a click sound is heard, it means that the hollow armrest shell 201 is folded in place, and the limit rod 205 is in a locked state. Plugged into the positioning hole 211 of the folded position, when the armrest 2 needs to be used, the button 203 is squeezed upward in the same manner, and then the limiting rod 205 is pulled upward through the wire rope 204, so that the limiting rod 205 is pulled out of the positioning hole 211. At this time, the hollow armrest shell 201 is in an unlocked state, and then the armrest 2 is rotated away from the seat cushion 3. When a click is heard, it indicates that the hollow armrest shell 201 is unfolded into place, and the limiting rod 205 is plugged into the positioning hole 211 of the unfolded position.

[0049] Specifically, in order to facilitate the control of the operating status of the drive motor 11, a control circuit board 2012 for controlling the operating status of the drive motor 11 is fixedly installed inside the hollow armrest shell 201, and an installation opening 2011 for installing a joystick is opened at one end of the hollow armrest shell 201, and the joystick is electrically connected to the control circuit board 2012.

[0050] In this embodiment, the lower ends of the two front supporting legs 102 of the frame 1 are both provided with front wheels 6, and a shock absorbing mechanism 8 is provided between the front wheels 6 and the lower ends of the front supporting legs 102;

[0051] The shock absorbing mechanism 8 includes a rotating plate 801, a mounting bracket 802, a cap screw 803 and a shock absorbing spring 804. The lower end of the rotating plate 801 is hinged to the top end of the mounting bracket 802. The interior of the front supporting leg 102 is hollow. A countersunk hole 8011 is provided on the top of the rotating plate 801. A waist hole 8021 is provided on the top of the mounting bracket 802. The cap screw 803 is provided inside the front supporting leg 102. The lower end of the cap screw 803 passes through the bottom of the front supporting leg 102 and passes through the countersunk hole 8011 and then passes through the waist hole 802. 1 is passed through, a compression nut 805 for fixing the rotating plate 801 and the front supporting leg 102 together is threadedly installed on the cap screw 803, a shock absorbing spring 804 is sleeved on the lower end of the cap screw 803, the upper end of the shock absorbing spring 804 is against the upper bottom of the rotating plate 801, and the lower end of the shock absorbing spring 804 is pressed on the top of the mounting bracket 802, and a limiting nut 806 for limiting the cap screw 803 in the waist hole 8021 is threadedly installed on the lower end of the cap screw 803, and the front wheel 6 is rotatably installed on the lower end of the mounting bracket 802.

[0052] The provided shock absorbing mechanism 8 can absorb shock for the front wheel 6, thereby improving the comfort of the electric wheelchair when traveling on bumpy roads.

[0053] To further facilitate the installation of the cap screw 803, a mounting hole is provided on the upper surface of the front support leg 102. To improve the aesthetics, a cover plate is detachably provided on the mounting hole.

[0054] Among them, the rear cross bar 1011 is fixedly connected to a support frame 1012, the support frame 1012 is fixedly installed with a battery holder 9, the battery holder 9 is detachably installed with a battery housing 10, and the battery housing 10 is provided with a battery for power supply. In this embodiment, a concave slot 901 is provided on the battery holder 9, and a card hole 902 connected to the inner side of the concave slot 901 is provided on one side of the battery holder 9. A convex plug block 1001 is fixedly connected to the surface of the battery housing 10. The convex plug block 1001 can be inserted into the concave slot 901, and a clamping piece 14 is slidably installed on the battery housing 10. A clamping head 1401 is formed at the lower end of the clamping piece 14. One end of the clamping head 1401 can penetrate the convex plug block 1001 and then be clamped into the concave slot 901. A second spring 15 is provided inside the battery housing 10, and one end of the second spring 15 abuts against one side of the clamping piece 14, and the other end of the second spring 15 abuts against the pillar inside the battery housing 10.

[0055] When the battery housing 10 needs to be removed, the user only needs to press the clamping member 14 to pull the clamping head 1401 out of the clamping hole 902, and then pull the battery housing 10 upward to remove the battery housing 10 from the battery holder 9, which is easy to operate.

[0056] In summary, the utility model adopts a frame 1 made of carbon fiber material, which greatly reduces the weight of the whole vehicle and is easy to use and carry;

[0057] The shock absorbing mechanism 8 can be provided to absorb the shock of the front wheel 6, thereby improving the comfort of the electric wheelchair when driving on a bumpy road;

[0058] The foldable armrest 2 is provided to facilitate folding and unfolding the armrest 2;

[0059] By providing a foldable frame 1, the whole vehicle can be folded for easy storage;

[0060] The battery housing 10 can be easily assembled and disassembled by means of the concave insertion slot 901 , the clamping hole 902 , the convex insertion block 1001 , the clamping member 14 and the second spring 15 .

[0061] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A carbon fiber electric wheelchair, characterized in that: The invention comprises a frame made of carbon fiber material, wherein the lower ends of the two front supporting legs of the frame are both provided with front wheels, the lower ends of the two rear supporting legs of the frame are both fixedly installed with driving motors, the rotating shafts of the driving motors are fixedly installed with driving wheels, a shock absorbing mechanism is arranged between the front wheels and the lower ends of the front supporting legs, the shock absorbing mechanism comprises a rotating plate, a mounting bracket, a cap screw and a shock absorbing spring, the lower end of the rotating plate is hinged to one end of the top of the mounting bracket, the interior of the front supporting legs is hollow, a countersunk hole is provided at the top of the rotating plate, a waist hole is provided at the top of the mounting bracket, the cap screw is arranged at Inside the front supporting leg, the lower end of the capped screw passes through the bottom of the front supporting leg and passes through the countersunk hole and then passes through the waist hole. A clamping nut is threadedly installed on the capped screw for fixing the rotating plate and the front supporting leg together. The shock-absorbing spring is sleeved on the lower end of the capped screw, and the upper end of the shock-absorbing spring is against the bottom of the upper end of the rotating plate. The lower end of the shock-absorbing spring is pressed on the top of the mounting bracket. A limiting nut is threadedly installed on the lower end of the capped screw for limiting the capped screw in the waist hole, and the front wheel is rotatably installed on the lower end of the mounting bracket.

2. A carbon fiber electric wheelchair according to claim 1, characterized in that: An armrest is foldably mounted on the seat cushion of the frame, the armrest comprises a hollow armrest shell, a connecting ring is fixedly connected to the bottom of the hollow armrest shell, a hinge shaft is fixedly connected to one side of the seat cushion, and the connecting ring is rotatably sleeved on the hinge shaft.

3. A carbon fiber electric wheelchair according to claim 2, characterized in that: A locking assembly for locking the position of the hollow armrest shell is provided inside the hollow armrest shell, and the locking assembly includes a button, a limit rod and a first spring, the limit rod is slidably arranged inside the hollow armrest shell, the lower end of the limit rod extends into the interior of the connecting ring, the lower end of the limit rod is fixedly connected to a lower limit block, the first spring is sleeved on the limit rod, the top of the first spring is against the bottom of the partition inside the hollow armrest shell, the bottom of the first spring is pressed on the top of the lower limit block, a plurality of positioning holes are provided on the hinge shaft, the lower end of the limit rod can be stuck in the positioning holes, the upper end of the interior of the hollow armrest shell is fixedly connected to a hinge seat, the upper end of the button is hinged to the hinge seat, and the lower end of the button is connected to the upper end of the limit rod through a wire rope.

4. A carbon fiber electric wheelchair according to claim 3, characterized in that: An upper limit block is fixedly connected to the upper end of the limit rod to prevent the lower end of the limit rod from being withdrawn from the interior of the connecting ring, and the outer diameter of the upper limit block is smaller than the inner diameter of the first spring.

5. The carbon fiber electric wheelchair according to claim 3, characterized in that: The frame also includes a front cross bar, a connecting frame, a rear cross bar and a backrest frame. The upper ends of the rear support legs and the upper ends of the front support legs on the same side are hinged through a hinge shaft, one end of the seat cushion is hinged to the hinge shaft, the front cross bar is fixedly connected between the two front support legs, the rear cross bar is fixedly connected between the two rear support legs, the lower end of the backrest frame is arranged in an inverted V shape, one of the branches at the lower end of the backrest frame is hinged to one end of the seat cushion, and the other branch at the lower end of the backrest frame is hinged to the lower end of the rear support leg. An upper mounting seat is fixedly connected to the middle part of the lower end of the backrest frame, and a lower mounting seat is fixedly connected to the rear cross bar. The upper mounting seat and the lower mounting seat are connected by a connecting buckle, and a hook is formed at the bottom of the connecting buckle. A hinge block is fixedly connected to the upper end of one side of the connecting buckle, and the hinge block is connected to the upper mounting seat through an upper pin. A lower pin is provided on the lower mounting seat, and the hook is clamped on the lower pin. One end of the connecting frame is hinged to the front cross bar, and the other end of the connecting frame is hinged to the lower end of the backrest frame.

6. A carbon fiber electric wheelchair according to claim 5, characterized in that: A support frame is fixedly connected to the rear cross bar, a battery seat is fixedly mounted on the support frame, a battery shell is detachably mounted on the battery seat, and a battery for power supply is arranged inside the battery shell.

7. A carbon fiber electric wheelchair according to claim 6, characterized in that: A concave slot is provided on the battery seat, and a card hole connected to the inner side of the concave slot is provided on one side of the battery seat. A convex plug block is fixedly connected to the surface of the battery shell, and the convex plug block can be inserted into the concave slot. A clamping piece is slidably installed on the battery shell, and a clamping head is formed at the lower end of the clamping piece. One end of the clamping head can penetrate the convex plug block and then be clamped into the concave slot. A second spring is provided inside the battery shell, and one end of the second spring abuts against one side of the clamping piece, and the other end of the second spring abuts against a pillar inside the battery shell.

8. The carbon fiber electric wheelchair according to claim 7, characterized in that: A mudguard for shielding the driving wheel is fixedly mounted on the lower end of the rear supporting leg.

9. A carbon fiber electric wheelchair according to claim 8, characterized in that: A control circuit board for controlling the operating state of the drive motor is fixedly installed inside the hollow armrest shell, and a mounting opening for mounting a joystick is opened at one end of the hollow armrest shell, and the joystick is electrically connected to the control circuit board.

10. The carbon fiber electric wheelchair according to claim 9, characterized in that: A foot pedal is hinged between the two front supporting legs, and when the foot pedal is unfolded, the front cross bar can support the foot pedal.

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