Electric wheelchair

Abstract

The utility model discloses an electric wheelchair which comprises a support, a driving assembly and a storage battery are arranged at the bottom of the support. The supporting pad is arranged at the top of the bracket; the controller is arranged on the supporting pad and electrically connected with the driving assembly and the storage battery. The ultrasonic sensor is arranged at the rear end of the support and electrically connected with the controller, and when the controller controls the driving assembly to drive the electric wheelchair to retreat and the ultrasonic sensor detects that an obstacle exists on the rear side of the electric wheelchair, the controller controls the driving assembly to decelerate until the electric wheelchair stops moving. According to the electric wheelchair, when the electric wheelchair backs up, obstacles behind the electric wheelchair can be detected through the ultrasonic sensor at the rear end of the support, and when the obstacles are detected, the controller controls the electric wheelchair to gradually decelerate until the electric wheelchair stops moving, so that the electric wheelchair is prevented from colliding with the obstacles or pedestrians behind, and the safety performance of the electric wheelchair is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of walking tools, in particular to an electric wheelchair. Background Art

[0002] Most electric wheelchairs currently lack the safety design of the automotive industry for reversing safety, so accidents such as hitting pedestrians or obstacles when reversing are inevitable in crowded public places such as squares and subways.

[0003] Therefore the prior art still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an electric wheelchair, aiming to solve the problem in the prior art that the electric wheelchair will inevitably hit pedestrians or obstacles when reversing in public places.

[0005] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0006] In a first aspect, an embodiment of the utility model provides an electric wheelchair, comprising:

[0007] A bracket, wherein a driving assembly and a battery are provided at the bottom of the bracket;

[0008] A support pad, the support pad is arranged on the top of the bracket;

[0009] A controller, the controller is arranged on the support pad and is electrically connected to the drive assembly and the battery respectively;

[0010] An ultrasonic sensor is arranged at the rear end of the bracket and is electrically connected to the controller. When the controller controls the driving component to drive the electric wheelchair backward and the ultrasonic sensor detects an obstacle on the rear side of the electric wheelchair, the controller controls the driving component to decelerate until it stops moving.

[0011] As a further improved technical solution, the drive assembly includes a drive plate, a motor, a rear wheel and a front wheel; wherein, the drive plate is detachably arranged on the bracket and electrically connected to the controller, the two motors are respectively arranged on both sides of the rear end of the bottom of the bracket and are respectively electrically connected to the drive plate, the two motors are respectively connected to one of the rear wheels, the front wheels are provided with two, and the two front wheels are respectively arranged on both sides of the front end of the bottom of the bracket.

[0012] As a further improved technical solution, a battery slot is provided at the bottom rear end of the bracket, buckles are provided on opposite sides of the battery slot, elastic buckles are provided on opposite sides of the battery, and the battery is arranged in the battery slot and engaged with the buckles through the elastic buckles.

[0013] As a further improved technical solution, the support cushion includes a seat cushion, a back cushion and an armrest; wherein, the seat cushion is arranged on the support plate of the bracket, the back cushion is arranged at the rear end of the support plate and located on one side of the seat cushion, the armrest is arranged on the back cushion, and the controller is arranged on the armrest.

[0014] As a further improved technical solution, the cushion is connected to the support plate through a first connecting rod, and a plurality of first screw holes are provided on the first connecting rod along the length direction of the first connecting rod, and the first connecting rod is detachably connected to the support plate through a plurality of bolts, and a plurality of bolts respectively penetrate a plurality of the first screw holes; a second screw hole and a plurality of positioning holes of inconsistent heights are also provided at the end of the first connecting rod, a second connecting rod is provided at the bottom end of the cushion, a third screw hole and a fourth screw hole are provided on the second connecting rod, one end of the second connecting rod is detachably connected to the first connecting rod by bolts penetrating the third screw hole and the second screw hole, and the other end of the second connecting rod is detachably connected to the first connecting rod by bolts penetrating the fourth screw hole and any positioning hole.

[0015] As a further improved technical solution, the armrest is connected to the cushion through a third connecting rod, and a plurality of fifth screw holes are provided on the cushion along the height direction of the cushion. One end of the third connecting rod is detachably connected to the cushion through a plurality of bolts penetrating one end of the third connecting rod and a plurality of fifth screw holes, and the other end of the third connecting rod is detachably connected to the armrest.

[0016] As a further improved technical solution, the armrest is connected to the third connecting rod through a connecting plate, and a sixth screw hole and an arc groove are provided on the connecting plate. The middle part of the connecting plate is detachably connected to the third connecting rod by a bolt passing through the sixth screw hole and the third connecting rod, one end of the connecting plate is detachably connected to the third connecting rod by a bolt passing through the arc groove and the third connecting rod, and the other end of the connecting plate is detachably connected to the armrest.

[0017] As a further improved technical solution, an arc-shaped hole is provided at the other end of the connecting plate, and the connecting plate and the handrail are detachably connected by bolts penetrating the arc-shaped hole and the handrail.

[0018] As a further improved technical solution, the above electric wheelchair also includes:

[0019] A hanging rack is provided with a mounting hole, the hanging rack is detachably arranged on the cushion through the mounting hole, and the mounting holes are respectively provided on both sides of the hanging rack.

[0020] As a further improved technical solution, the above electric wheelchair also includes:

[0021] A desktop, wherein a vertical support rod is provided at the bottom of the desktop, a retaining ring is provided on the support rod, a sleeve is provided at the front end of the armrest, the support rod is arranged in the sleeve, and the top end of the sleeve abuts against the retaining ring.

[0022] Compared with the prior art, the embodiment of the utility model has the following advantages:

[0023] The embodiment of the utility model provides an electric wheelchair, comprising: a bracket, a driving assembly and a battery are provided at the bottom of the bracket; a support pad, the support pad is arranged at the top of the bracket; a controller, the controller is arranged on the support pad and is electrically connected to the driving assembly and the battery respectively; an ultrasonic sensor, the ultrasonic sensor is arranged at the rear end of the bracket and is electrically connected to the controller, when the controller controls the driving assembly to drive the electric wheelchair to move backward and the ultrasonic sensor detects an obstacle at the rear side of the electric wheelchair, the controller controls the driving assembly to decelerate until it stops moving. In the utility model, when the electric wheelchair is reversing, the obstacle behind the electric wheelchair can be detected by the ultrasonic sensor installed at the rear end of the bracket. When an obstacle is detected at the rear, the controller will control the electric wheelchair to gradually decelerate until it stops moving, so as to avoid colliding with obstacles or pedestrians at the rear, thereby improving the safety performance of the electric wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the three-dimensional structure of an electric wheelchair provided by the utility model;

[0025] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0026] Figure 3 A schematic diagram of the bottom structure of an electric wheelchair provided by the utility model;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the battery slot in the utility model;

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the storage battery in the utility model;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the support pad in the utility model;

[0030] Figure 7 This is a schematic diagram of the connection structure of the first connecting rod, the cushion and the armrest in the utility model;

[0031] Figure 8 for Figure 7 A magnified schematic diagram of B;

[0032] Fig. 9 It is a three-dimensional structural schematic diagram of the second connecting rod in the utility model;

[0033] Fig.10 This is a schematic diagram of the connection structure between the third connecting rod and the handrail in the utility model;

[0034] Fig.11 The present invention provides a schematic diagram of the structure of an electric wheelchair.

[0035] In the figure: 1, bracket; 101, support plate; 2, drive assembly; 201, drive plate; 202, motor; 203, rear wheel; 204, front wheel; 3, battery; 301, elastic buckle; 4, support pad; 401, seat cushion; 402, back cushion; 4021, fifth screw hole; 403, armrest; 5, controller; 6, ultrasonic sensor; 7, battery slot; 701, buckle position; 8, first connecting rod; 80 1. First screw hole; 802. Second screw hole; 803. Positioning hole; 9. Bolt; 10. Second connecting rod; 1001. Third screw hole; 1002. Fourth screw hole; 11. Third connecting rod; 12. Connecting plate; 1201. Sixth screw hole; 1202. Arc groove; 1203. Arc hole; 13. Hanging rack; 1301. Mounting hole; 14. Table top; 15. Support rod; 16. Retaining ring; 17. Sleeve. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] Example:

[0038] like Figure 1-Figure 11As shown. The electric wheelchair comprises: a bracket 1, a driving assembly 2 and a battery 3 are provided at the bottom of the bracket 1; a support pad 4, the support pad 4 is arranged on the top of the bracket 1; a controller 5, the controller 5 is arranged on the support pad 4 and is electrically connected to the driving assembly 2 and the battery 3 respectively; an ultrasonic sensor 6, the ultrasonic sensor 6 is arranged at the rear end of the bracket 1 and is electrically connected to the controller 5, when the controller 5 controls the driving assembly 2 to drive the electric wheelchair backward and the ultrasonic sensor 6 detects that there is an obstacle at the rear side of the electric wheelchair, the controller 5 controls the driving assembly 2 to decelerate until it stops moving.

[0039] like Figure 1 and Figure 2As shown, the electric wheelchair includes a bracket 1, a driving component 2, a battery 3, a support pad 4, a controller 5 and an ultrasonic sensor 6; wherein the support pad 4 is arranged on the top of the bracket 1 for sitting, the controller 5 is arranged on the support pad 4, the driving component 2 and the battery 3 are respectively arranged at the bottom of the bracket 1 and are respectively electrically connected to the controller 5, the driving component 2 is used to drive the electric wheelchair to move, the battery 3 is used to supply power to the controller 5 and other components, the ultrasonic sensor 6 is arranged at the rear end of the bracket 1 and is electrically connected to the controller 5, and multiple ultrasonic sensors 6 can be arranged. In this embodiment, the rear end of the bracket 1 is provided with three ultrasonic sensors 6 respectively electrically connected to the controller 5 , used to detect pedestrians or obstacles behind the electric wheelchair. When the ultrasonic sensor 6 detects an obstacle or pedestrian behind the electric wheelchair, the controller 5 controls the drive assembly 2 to gradually slow down and stop moving. The ultrasonic sensor 6 in this embodiment will brake the electric wheelchair only when it detects an obstacle behind the electric wheelchair when the electric wheelchair is reversing. That is, when the controller 5 controls the drive assembly 2 to drive the electric wheelchair backward, the ultrasonic sensor 6 will send a signal to the controller 5 when it detects an obstacle, so that the controller 5 controls the drive assembly 2 to slow down and stop moving. When the drive assembly 2 drives the electric wheelchair to move forward or left and right, the ultrasonic sensor 6 will not interfere with the movement state of the drive assembly 2. For example, when the electric wheelchair is reversing and the ultrasonic sensor 6 has a detection range of three meters, after it detects an obstacle, the controller 5 controls the drive assembly 2 to gradually slow down and stop at two meters, so that the rear side of the electric wheelchair maintains a safety distance of one meter from the obstacle. At the same time, the controller 5 is also provided with an alarm (not shown), such as an alarm bell or an alarm light. When the electric wheelchair is reversing, after the ultrasonic sensor 6 detects an obstacle, the alarm starts to send an alarm message (bell or flashing light). In addition, the controller 5 in this embodiment is also provided with a switch (not shown) of the ultrasonic sensor 6, which is used to turn on or off all the ultrasonic sensors 6. In the present utility model, when the electric wheelchair is reversing, the ultrasonic sensor 6 installed at the rear end of the bracket 1 can detect obstacles behind the electric wheelchair. When an obstacle is detected behind, the controller 5 will control the electric wheelchair to gradually slow down until it stops moving, so as to avoid colliding with obstacles or pedestrians behind, thereby improving the safety performance of the electric wheelchair.

[0040] like Figure 3 As shown, as a further solution, the driving assembly 2 includes a driving plate 201, a motor 202, a rear wheel 203 and a front wheel 204; wherein the driving plate 201 is detachably arranged on the bracket 1 and is electrically connected to the controller 5, see Fig.11The driving plate 201 is connected to the bracket 1 by bolts 9. When the drive of the electric wheelchair needs to be upgraded later, the driving plate 201 can be directly disassembled and replaced with an upgraded version. The two motors 202 are respectively arranged on both sides of the rear end of the bottom of the bracket 1 and are respectively electrically connected to the driving plate 201. The two motors 202 are respectively connected to a rear wheel 203. The motor 202 is driven by the driving plate 201 to drive the rear wheel 203 to rotate. There are two front wheels 204, and the two front wheels 204 are respectively arranged on both sides of the front end of the bottom of the bracket 1.

[0041] like Figure 4 and Figure 5 As shown, as a further solution, the rear end of the bottom of the bracket 1 is provided with a battery slot 7, and buckles 701 are provided on opposite sides of the battery slot 7, and elastic buckles 301 are provided on opposite sides of the battery 3. The battery 3 is arranged in the battery slot 7 and is engaged with the buckles 701 through the elastic buckles 301. Specifically, the battery 3 can be fixed by aligning it with the battery slot 7 and pressing it when installing, and can be pulled out by force when it needs to be taken out, so that the battery 3 is easy to replace.

[0042] like Figure 6 As shown, in this embodiment, the support cushion 4 includes a seat cushion 401, a back cushion and an armrest 403; wherein, the seat cushion 401 is arranged on the support plate 101 of the bracket 1, the back cushion is arranged at the rear end of the support plate 101 and is located on one side of the seat cushion 401, the armrest 403 is arranged on the back cushion, and the controller 5 is arranged on the armrest 403, so that the user can sit on the seat cushion 401 and operate the controller 5 with his hands.

[0043] like Figure 7-10As shown, as a further solution, the back cushion is connected to the support plate 101 through a first connecting rod 8, and a plurality of first screw holes 801 are provided on the first connecting rod 8 along the length direction of the first connecting rod 8, and the first screw holes 801 are arranged in a row on the first connecting rod 8, and the first connecting rod 8 and the support plate 101 are detachably connected through a plurality of bolts 9, and a plurality of bolts 9 respectively penetrate a plurality of the first screw holes 801, and the first connecting rod 8 can adjust the distance between the back cushion and the seat cushion 401 by changing the hole position through which the bolts 9 penetrate, thereby enhancing the comfort of the electric wheelchair. The end of the first connecting rod 8 is also provided with a second screw hole 802 and a plurality of positioning holes 803 with inconsistent heights, and each of the positioning holes 803 is arranged in a row and tilted forward, that is, among the positioning holes 803 in the same row, the higher the height of the positioning hole 803, the closer it is to the front of the electric wheelchair. A second connecting rod 10 is provided at the bottom end of the cushion, and a third screw hole 1001 and a fourth screw hole 1002 are provided on the second connecting rod 10. One end of the second connecting rod 10 is detachably connected to the first connecting rod 8 by a bolt 9 penetrating the third screw hole 1001 and the second screw hole 802, and the other end of the second connecting rod 10 is detachably connected to the first connecting rod 8 by a bolt 9 penetrating the fourth screw hole 1002 and any positioning hole 803. When the bolt 9 penetrates the fourth screw hole 1002 and any positioning hole 803, the higher the height of the positioning hole 803, the higher the backward inclination of the cushion. The comfort of the electric wheelchair can be enhanced by adjusting the inclination of the cushion.

[0044] As a further solution, the armrest 403 is connected to the cushion through a third connecting rod 11, and a plurality of fifth screw holes 4021 are provided on the cushion along the height direction of the cushion, and the plurality of fifth screw holes 4021 are distributed in multiple vertical rows, one end of the third connecting rod 11 is detachably connected to the cushion through a plurality of bolts 9 penetrating one end of the third connecting rod 11 and a plurality of fifth screw holes 4021, and the other end of the third connecting rod 11 is detachably connected to the armrest 403, and the third connecting rod 11 can change the height on the cushion by the hole position of the fifth screw hole 4021 penetrated by the bolt 9, thereby adjusting the height of the armrest 403.

[0045] In this embodiment, the armrest 403 is connected to the third connecting rod 11 through a connecting plate 12, and a sixth screw hole 1201 and an arc groove 1202 are provided on the connecting plate 12. The middle part of the connecting plate 12 is detachably connected to the third connecting rod 11 by a bolt 9 penetrating the sixth screw hole 1201 and the third connecting rod 11, one end of the connecting plate 12 is detachably connected to the third connecting rod 11 by a bolt 9 penetrating the arc groove 1202 and the third connecting rod 11, and the other end of the connecting plate 12 is detachably connected to the armrest 403. Specifically, the sixth screw hole 1201 on the connecting plate 12 is used to fix the connecting plate 12, and the arc groove 1202 is used to position the connecting plate 12. When the bolt 9 passing through the arc groove 1202 and the bolt 9 passing through the sixth screw hole 1201 are loosened, the connecting plate 12 is rotated through the arc groove 1202, the angle of the connecting plate 12 is adjusted, and then the bolt 9 passing through the arc groove 1202 and the bolt 9 passing through the sixth screw hole 1201 are tightened. At this time, the angle of the armrest 403 also changes. The armrest 403 in this embodiment can adjust the tilt angle, thereby further enhancing the comfort of the electric wheelchair.

[0046] As a further solution, the other end of the connecting plate 12 is provided with an arc-shaped hole 1203, and the connecting plate 12 and the handrail 403 are detachably connected by a bolt 9 that passes through the arc-shaped hole 1203 and the handrail 403. Specifically, after the bolt 9 that passes through the arc-shaped hole 1203 is loosened, the connecting plate 12 is also slightly rotated horizontally through the arc-shaped hole 1203, and the bolt 9 is tightened after rotating a certain angle, at which time the handrail 403 is fixed and the angle in the horizontal direction is also changed.

[0047] As a further solution, the electric wheelchair further includes a hanging rack 13, on which a mounting hole 1301 is provided, and the hanging rack 13 is detachably arranged on the back cushion through the mounting hole 1301, and the mounting holes 1301 are respectively provided on both sides of the hanging rack 13. Specifically, the front and side surfaces of the hanging rack 13 are provided with mounting holes 1301 of the same size, that is, the hanging rack 13 can change the installation direction according to the needs, and the hanging rack 13 has various forms, and the mounting holes 1301 on each of the hanging racks 13 are all adapted to the fifth screw holes 4021 on the back cushion. The hanging rack 13 is convenient for hanging a backpack or shopping bag, etc. at the rear of the electric wheelchair.

[0048] In this embodiment, the electric wheelchair further comprises a tabletop 14, a vertical support rod 15 is provided at the bottom of the tabletop 14, a retaining ring 16 is provided on the support rod 15, a sleeve 17 is provided at the front end of the armrest 403, the support rod 15 is arranged in the sleeve 17, and the top end of the sleeve 17 abuts against the retaining ring 16. When the tabletop 14 needs to be removed, the tabletop 14 can be directly lifted upwards, which is very convenient.

[0049] In summary, the embodiment of the utility model provides an electric wheelchair, comprising: a bracket 1, the bottom of which is provided with a driving assembly 2 and a battery 3; a support pad 4, the support pad 4 is arranged on the top of the bracket 1; a controller 5, the controller 5 is arranged on the support pad 4 and is electrically connected to the driving assembly 2 and the battery 3 respectively; an ultrasonic sensor 6, the ultrasonic sensor 6 is arranged at the rear end of the bracket 1 and is electrically connected to the controller 5, when the controller 5 controls the driving assembly 2 to drive the electric wheelchair backward and the ultrasonic sensor 6 detects that there is an obstacle behind the electric wheelchair, the controller 5 controls the driving assembly 2 to decelerate until it stops moving. In the utility model, when the electric wheelchair is reversing, the ultrasonic sensor 6 installed at the rear end of the bracket 1 can be used to detect obstacles behind the electric wheelchair. When an obstacle is detected behind, the controller 5 will control the electric wheelchair to gradually decelerate until it stops moving, so as to avoid colliding with obstacles or pedestrians behind, thereby improving the safety performance of the electric wheelchair.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0055] Of course, the description of the above embodiments of the utility model is relatively detailed, but it cannot be understood as limiting the scope of protection of the utility model. The utility model can also have many other implementation methods. Based on this implementation method, other implementation methods obtained by ordinary technicians in this field without any creative work all belong to the scope of protection of the utility model. The scope of protection of the utility model shall be based on the attached claims.

Claims

1. An electric wheelchair, characterized in that: include: A bracket, wherein a driving assembly and a battery are provided at the bottom of the bracket; A support pad, the support pad is arranged on the top of the bracket; A controller, the controller is arranged on the support pad and is electrically connected to the drive assembly and the battery respectively; An ultrasonic sensor, the ultrasonic sensor being arranged at the rear end of the bracket and being electrically connected to the controller, wherein when the controller controls the driving assembly to drive the electric wheelchair backward and the ultrasonic sensor detects an obstacle at the rear side of the electric wheelchair, the controller controls the driving assembly to decelerate until the movement stops; The driving assembly includes a driving plate, a motor, a rear wheel and a front wheel; wherein the driving plate is detachably arranged on the bracket and electrically connected to the controller, the two motors are respectively arranged on both sides of the rear end of the bottom of the bracket and are respectively electrically connected to the driving plate, the two motors are respectively connected to one of the rear wheels, the front wheels are provided with two, and the two front wheels are respectively arranged on both sides of the front end of the bottom of the bracket.

2. The electric wheelchair according to claim 1, characterized in that: A battery slot is provided at the rear end of the bottom of the bracket, buckles are provided on opposite sides of the battery slot, elastic buckles are provided on opposite sides of the battery, and the battery is arranged in the battery slot and engaged with the buckles through the elastic buckles.

3. The electric wheelchair according to claim 1, characterized in that: The support cushion includes a seat cushion, a back cushion and an armrest; wherein the seat cushion is arranged on the support plate of the bracket, the back cushion is arranged at the rear end of the support plate and located on one side of the seat cushion, the armrest is arranged on the back cushion, and the controller is arranged on the armrest.

4. The electric wheelchair according to claim 3, characterized in that: The cushion is connected to the support plate through a first connecting rod, and a plurality of first screw holes are provided on the first connecting rod along the length direction of the first connecting rod, and the first connecting rod is detachably connected to the support plate through a plurality of bolts, and the plurality of bolts respectively penetrate through a plurality of the first screw holes; a second screw hole and a plurality of positioning holes of inconsistent heights are also provided at the end of the first connecting rod, a second connecting rod is provided at the bottom end of the cushion, and a third screw hole and a fourth screw hole are provided on the second connecting rod, one end of the second connecting rod is detachably connected to the first connecting rod by bolts penetrating the third screw hole and the second screw hole, and the other end of the second connecting rod is detachably connected to the first connecting rod by bolts penetrating the fourth screw hole and any positioning hole.

5. The electric wheelchair according to claim 3, characterized in that: The armrest is connected to the cushion via a third connecting rod. A plurality of fifth screw holes are provided on the cushion along the height direction of the cushion. One end of the third connecting rod is detachably connected to the cushion via a plurality of bolts penetrating one end of the third connecting rod and a plurality of fifth screw holes. The other end of the third connecting rod is detachably connected to the armrest.

6. The electric wheelchair according to claim 5, characterized in that: The armrest is connected to the third connecting rod through a connecting plate, and a sixth screw hole and an arc groove are provided on the connecting plate. The middle part of the connecting plate is detachably connected to the third connecting rod by a bolt passing through the sixth screw hole and the third connecting rod, one end of the connecting plate is detachably connected to the third connecting rod by a bolt passing through the arc groove and the third connecting rod, and the other end of the connecting plate is detachably connected to the armrest.

7. The electric wheelchair according to claim 6, characterized in that: The other end of the connecting plate is provided with an arc-shaped hole, and the connecting plate and the handrail are detachably connected by bolts penetrating the arc-shaped hole and the handrail.

8. The electric wheelchair according to claim 3, characterized in that: Also includes: A hanging rack is provided with a mounting hole, the hanging rack is detachably arranged on the cushion through the mounting hole, and the mounting holes are respectively provided on both sides of the hanging rack.

9. The electric wheelchair according to claim 3, characterized in that: Also includes: A desktop, wherein a vertical support rod is provided at the bottom of the desktop, a retaining ring is provided on the support rod, a sleeve is provided at the front end of the armrest, the support rod is arranged in the sleeve, and the top end of the sleeve abuts against the retaining ring.

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