Electric folding wheelchair

Abstract

The invention discloses an electric folding wheelchair which aims at simplifying the structure and reducing the influence of an electric push rod on a frame after folding, the electric folding wheelchair comprises a rear wheel support, a front wheel support, a supporting frame, a seat and the electric push rod, the rear wheel support is fixedly connected with one end of the supporting frame, the front wheel support is hinged to the supporting frame, and the electric push rod is arranged on the seat. The seat is located above the supporting frame, the end, close to the front wheel support, of the seat is hinged to the supporting frame, a damping module is arranged at the end, close to the rear wheel support, of the seat, and the damping module is detachably connected with the rear wheel support; the supporting frame is provided with a cavity, one end of the electric push rod is located in the cavity and hinged to the supporting frame, the other end of the electric push rod is hinged to the front wheel support, and the cavity can contain part of the electric push rod.

Description

Technical Field

[0001] The present invention belongs to the technical field of wheelchairs, and more specifically, relates to an electric folding wheelchair. Background Art

[0002] At present, many wheelchairs can be folded for easy carrying or storage. In order to facilitate folding, electric folding technology has even been developed that can automatically fold the wheelchair.

[0003] For example, patent CN201710176791.7 discloses an electric folding wheelchair, comprising a front wheel, a rear wheel, a seat bracket, a backrest bracket, and an electric telescopic push rod, wherein the front wheel is fixed to the lower end of the front wheel fixing rod, and a first base frame and a second base frame are arranged below the seat bracket, wherein the first base frame is arranged below the rear end of the seat bracket and its upper end is hinged to the lower end of the backrest bracket, the second base frame is arranged along the front and rear direction of the electric folding wheelchair and its rear end is hinged to the first base frame, the front end of the second base frame is hinged to the front wheel fixing rod, one end of the electric telescopic push rod is hinged to the front part of the seat bracket, and the other end of the electric telescopic push rod is hinged to the middle part of the hinge of the first base frame;

[0004] In the above-mentioned folding wheelchair, the rear wheel fixing rod and the front wheel fixing rod constitute a support frame, which is supported on both sides of the electric telescopic push rod, and the electric telescopic push rod can provide stable power; traditional folding wheelchairs all adopt this type of structure, with a support frame, and the electric telescopic push rod is located between the two support frames. Under this structure, the overall weight of the wheelchair is relatively large, and the volume after folding is also relatively large. Summary of the invention

[0005] The main purpose of the present invention is to provide an electric folding wheelchair, aiming to simplify the structure and reduce the influence of the electric push rod on the frame after folding.

[0006] According to a first aspect of the present invention, there is provided an electric folding wheelchair, comprising a rear wheel bracket, a front wheel bracket, a support frame, a seat and an electric push rod, wherein the rear wheel bracket is fixedly connected to one end of the support frame, the front wheel bracket is hinged to the support frame, the seat is located above the support frame, one end of the seat close to the front wheel bracket is hinged to the support frame, and one end of the seat close to the rear wheel bracket is provided with a shock absorbing module, and the shock absorbing module is detachably connected to the rear wheel bracket;

[0007] The support frame has a chamber, one end of the electric push rod is located in the chamber and is hinged to the support frame, the other end of the electric push rod is hinged to the front wheel bracket, and the chamber can accommodate a portion of the electric push rod.

[0008] In the above-mentioned electric folding wheelchair, the support frame is a square tube, and a notch is provided on the downward side of the square tube. The notch is connected to the inner cavity of the square tube so that the inner cavity of the square tube constitutes the chamber, and the electric push rod enters the chamber through the notch.

[0009] In the above-mentioned electric folding wheelchair, the front wheel bracket includes two symmetrically arranged front wheel mounting tubes, the support frame is located between the two front wheel mounting tubes, one end of the front wheel mounting tube is rotatably connected to the support frame, and the other end of the front wheel mounting tube is provided with a universal wheel, the two front wheel mounting tubes are connected by a reinforcing tube, and the electric push rod is hinged to the reinforcing tube.

[0010] In the above-mentioned electric folding wheelchair, a foot bracket is rotatably provided on the reinforcing tube;

[0011] When the foot support is rotated to the first position, the foot support can be used for the passenger to place his feet;

[0012] When the foot support is rotated to the second position, the foot support is against the seat.

[0013] In the above-mentioned electric folding wheelchair, the shock absorbing module comprises a spring shock absorber, the upper end of the spring shock absorber is hinged to the seat, and the lower end of the spring shock absorber is detachably connected to the rear wheel bracket.

[0014] In the above-mentioned electric folding wheelchair, the upper end of the spring shock absorber is rotatably connected to the seat via a first latch, and the lower end of the spring shock absorber is rotatably connected to the rear wheel bracket via a second latch; the spring shock absorber can be separated from the rear wheel bracket by pulling out the second latch.

[0015] In the above-mentioned electric folding wheelchair, there are two spring shock absorbers which are symmetrically arranged along the support frame.

[0016] In the above-mentioned electric folding wheelchair, the rear wheel bracket includes a frame, two drive motors arranged on the frame, the output ends of the drive motors are provided with wheels, and the frame is fixedly connected to the support frame.

[0017] In the above-mentioned electric folding wheelchair, the seat comprises a seat cushion and a backrest, the backrest is rotatably connected to the seat cushion, and the shock absorbing module is arranged between the seat cushion and the rear wheel bracket;

[0018] An armrest frame is arranged on the backrest, and the armrest frame is rotatable.

[0019] In the above-mentioned electric folding wheelchair, the seat comprises a seat cushion and a backrest, the backrest is rotatably connected to the seat cushion, and the shock absorbing module is arranged between the seat cushion and the rear wheel bracket;

[0020] A fixing tube is provided at the bottom of the seat cushion, the extension direction of the fixing tube is parallel to the rotation axis of the backrest, and armrest mounting tubes are detachably inserted at both ends of the fixing tube along the extension direction thereof, and an armrest frame is provided on the armrest mounting tube;

[0021] The cross sections of the fixing tube and the handrail mounting tube are both square.

[0022] One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0023] In the present invention, a support frame is used to connect the entire frame in series, which simplifies the structure. At the same time, the support frame has a cavity, and the electric push rod is arranged on the support frame. When the wheelchair is opened, the electric push rod can be extended from the cavity and supported between the support frame and the front wheel bracket. When the electric push rod is to fold the wheelchair, the electric push rod is partially hidden in the cavity, which reduces the influence of the electric push rod on the support frame and ensures that the volume is small enough after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0025] Figure 1 is a schematic structural diagram of the wheelchair in the embodiment 1 of the present invention when it is opened;

[0026] Figure 2 is a schematic structural diagram of the wheelchair in the folded state according to the first embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a wheelchair in an open state according to Embodiment 2 of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the wheelchair of embodiment 2 of the present invention when folded.

[0029] Among them, the reference numerals of each figure are:

[0030] 1. Rear wheel bracket; 11. Frame; 12. Drive motor; 13. Wheel; 2. Front wheel bracket; 21. Front wheel mounting tube; 22. Universal wheel; 23. Reinforcement tube; 3. Support frame; 31. Chamber; 4. Seat; 41. Seat cushion; 42. Backrest; 43. Armrest bracket; 44. Fixed tube; 45. Armrest mounting tube; 5. Electric push rod; 6. Shock absorption module; 7. Foot support. DETAILED DESCRIPTION

[0031] 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 represent the same or similar elements or elements having the same or similar functions from beginning to end. 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.

[0032] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0033] Example 1

[0034] Reference Figure 1 to Figure 2 As shown, an electric folding wheelchair comprises a rear wheel bracket 1, a front wheel bracket 2, a support frame 3, a seat 4 and an electric push rod 5, wherein the rear wheel bracket 1 is fixedly connected to one end of the support frame 3, the front wheel bracket 2 is hinged to the support frame 3, the seat 4 is located above the support frame 3, one end of the seat 4 close to the front wheel bracket 2 is hinged to the support frame 3, and one end of the seat 4 close to the rear wheel bracket 1 is provided with a shock absorbing module 6, the shock absorbing module 6 is detachably connected to the rear wheel bracket 1, and the shock absorbing module 6 can reduce the vibration of the wheelchair during walking;

[0035] The support frame 3 has a chamber 31. One end of the electric push rod 5 is located in the chamber 31 and is hinged to the support frame 3. The other end of the electric push rod 5 is hinged to the front wheel bracket 2. The chamber 31 can accommodate part of the electric push rod 5. The front wheel bracket 2 is driven to rotate by the extension and retraction of the electric push rod 5, thereby realizing the folding of the wheelchair.

[0036] The present embodiment adopts a support frame 3 to connect the entire frame in series, thereby simplifying the structure. Meanwhile, the support frame 3 has a chamber 31, and the electric push rod 5 is arranged on the support frame 3. When the wheelchair is opened, the electric push rod 5 can extend from the chamber 31 and be supported between the support frame 3 and the front wheel bracket 2. When the electric push rod 5 is to be folded, the electric push rod 5 is partially hidden in the chamber 31, thereby reducing the influence of the electric push rod 5 on the support frame 3 and ensuring that the structure is compact enough after folding.

[0037] In this embodiment, the support frame 3 is a square tube, which is a hollow structure. A notch is provided on the downward side of the square tube, and the notch is connected to the inner cavity of the square tube, so that the inner cavity of the square tube constitutes a chamber 31, and the electric push rod 5 enters the chamber 31 through the notch. If a square tube is used, the support frame 3 has better rigidity, and the square tube has a ready-made inner cavity, and there is no need to additionally process the chamber 31.

[0038] In this embodiment, the front wheel bracket 2 includes two symmetrically arranged front wheel mounting tubes 21, the support frame 3 is located between the two front wheel mounting tubes 21, one end of the front wheel mounting tube 21 is rotatably connected to the support frame 3, and the other end of the front wheel mounting tube 21 is provided with a universal wheel 22. The two front wheel mounting tubes 21 are connected by a reinforcing tube 23, and the electric push rod 5 is hinged to the reinforcing tube 23. The electric push rod 5 is extended and retracted to drive the reinforcing tube 23 to move, thereby allowing the front wheel mounting tube 21 to rotate.

[0039] In this embodiment, a foot bracket 7 is rotatably provided on the reinforcing tube 23, and the foot bracket 7 includes an extension tube and a support plate. A hinged portion is provided on the reinforcing tube 23, and the hinged portion includes two ear blocks arranged at intervals along the length direction of the reinforcing tube 23. The ear block extends downward from the reinforcing tube 23, and a limiting groove is constructed between the two ear blocks. The extension tube passes through the limiting groove and is hinged to the ear block, so that the extension tube can rotate, and the support plate is fixed on the extension tube and rotates with the extension tube;

[0040] When the foot support 7 rotates to the first position, the support plate is in a low position, and the support plate can be used for passengers to place their feet. The support plate falls down due to gravity, so that the end of the extension tube away from the support plate is pressed onto the reinforcement tube 23, thereby stabilizing the state of the support plate;

[0041] When the foot support 7 rotates to the second position, the support plate is in a high position and can be leaned against the seat 4. At this time, the wheelchair is in a folded state, and the support plate leaning against the seat 4 can make the folded wheelchair structure more compact.

[0042] In this embodiment, the shock absorbing module 6 includes a spring shock absorber, the upper end of the spring shock absorber is hinged to the seat 4, and the lower end of the spring shock absorber is detachably connected to the rear wheel bracket 1; when the wheelchair is opened, the spring shock absorber is connected to the seat 4 and the rear wheel bracket 1 to play a shock absorbing role. When the wheelchair is folded, the spring shock absorber needs to be separated from the rear wheel bracket 1 first to ensure that the seat 4 can move down without being interfered by the spring shock absorber.

[0043] Specifically, the upper end of the spring shock absorber is rotatably connected to the seat 4 through a first pin, and the lower end of the spring shock absorber is rotatably connected to the rear wheel bracket 1 through a second pin; the spring shock absorber can be separated from the rear wheel bracket 1 by pulling out the second pin; the spring shock absorber is detachable by the setting of the first pin and the second pin. Generally speaking, only the second pin will be removed, and the first pin allows the spring shock absorber to be hung on the seat 4 to avoid loss of the spring shock absorber.

[0044] In this embodiment, there are two spring shock absorbers which are symmetrically arranged along the support frame 3 to improve the stability of the wheelchair.

[0045] In this embodiment, the rear wheel bracket 1 includes a frame 11, two drive motors 12 arranged on the frame 11, and a wheel 13 is provided at the output end of the drive motor 12. The frame 11 is fixedly connected to the support frame 3, and the drive motor 12 drives the wheel 13 to rotate, so that the wheelchair can move. The outer diameter of the wheel 13 is larger than the outer diameter of the universal wheel 22.

[0046] In this embodiment, the seat 4 includes a seat cushion 41 and a backrest 42, and the backrest 42 is rotatably connected to the seat cushion 41. The shock-absorbing module 6 is arranged between the seat cushion 41 and the rear wheel bracket 1; when the backrest 42 is rotated backward to a certain position, it will resist the seat cushion 41, and the backrest 42 cannot continue to rotate backward. At this time, the backrest 42 is in an open state for use by the passenger. When the wheelchair needs to be folded, the backrest 42 can be rotated forward to allow the backrest 42 and the seat cushion 41 to be folded.

[0047] In this embodiment, an armrest frame 43 is provided on the backrest 42, and the armrest frame 43 can be rotated. When the wheelchair is folded, the armrest frame 43 can be retracted; at the same time, a remote control is detachably mounted on the armrest frame 43, and the remote control can be removed when the wheelchair is folded.

[0048] Example 2

[0049] Reference Figure 3 to Figure 4 As shown, the general structure is similar to that of the embodiment 1, except that: a fixing tube 44 is provided at the bottom of the seat cushion 41, the fixing tube 44 is used to connect with the spring shock absorber, the extension direction of the fixing tube 44 is parallel to the rotation axis of the backrest 42, and armrest mounting tubes 45 are detachably inserted at both ends of the fixing tube 44 along the extension direction thereof, and an armrest frame 43 is provided on the armrest mounting tube 45;

[0050] The cross-sections of the fixing tube 44 and the armrest mounting tube 45 are both square. When the wheelchair is folded, the armrest mounting tube 45 can be removed, the posture of the armrest mounting tube 45 can be adjusted, and then installed back on the fixing tube 44, changing from a vertical posture to a horizontal posture, so that the folded wheelchair structure is more compact;

[0051] Furthermore, the armrest 43 can also rotate, and when the wheelchair is folded, the armrest 43 can change direction.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric folding wheelchair, characterized in that: It includes a rear wheel bracket, a front wheel bracket, a support frame, a seat and an electric push rod, wherein the rear wheel bracket is fixedly connected to one end of the support frame, the front wheel bracket is hinged to the support frame, the seat is located above the support frame, one end of the seat close to the front wheel bracket is hinged to the support frame, and one end of the seat close to the rear wheel bracket is provided with a shock absorbing module, and the shock absorbing module is detachably connected to the rear wheel bracket; The support frame has a chamber, one end of the electric push rod is located in the chamber and is hinged to the support frame, the other end of the electric push rod is hinged to the front wheel bracket, and the chamber can accommodate a portion of the electric push rod.

2. The electric folding wheelchair according to claim 1, characterized in that: The support frame is a square tube, and a notch is provided on a downward side of the square tube. The notch is communicated with the inner cavity of the square tube, so that the inner cavity of the square tube constitutes the chamber, and the electric push rod enters the chamber through the notch.

3. The electric folding wheelchair according to claim 1, characterized in that: The front wheel bracket includes two symmetrically arranged front wheel mounting tubes, the support frame is located between the two front wheel mounting tubes, one end of the front wheel mounting tube is rotatably connected to the support frame, the other end of the front wheel mounting tube is provided with a universal wheel, the two front wheel mounting tubes are connected by a reinforcing tube, and the electric push rod is hinged to the reinforcing tube.

4. The electric folding wheelchair according to claim 3, characterized in that: A foot bracket is rotatably provided on the reinforcement tube; When the foot support is rotated to the first position, the foot support can be used for the passenger to place his feet; When the foot support is rotated to the second position, the foot support is against the seat.

5. The electric folding wheelchair according to claim 1, characterized in that: The shock absorbing module comprises a spring shock absorber, the upper end of the spring shock absorber is hinged to the seat, and the lower end of the spring shock absorber is detachably connected to the rear wheel bracket.

6. The electric folding wheelchair according to claim 5, characterized in that: The upper end of the spring shock absorber is rotatably connected to the seat via a first latch, and the lower end of the spring shock absorber is rotatably connected to the rear wheel bracket via a second latch; the spring shock absorber can be separated from the rear wheel bracket by pulling out the second latch.

7. The electric folding wheelchair according to claim 5, characterized in that: There are two spring shock absorbers which are symmetrically arranged along the support frame.

8. The electric folding wheelchair according to claim 1, characterized in that: The rear wheel bracket comprises a frame and two driving motors arranged on the frame. The output ends of the driving motors are provided with wheels. The frame is fixedly connected to the supporting frame.

9. The electric folding wheelchair according to claim 1, characterized in that: The seat comprises a seat cushion and a backrest, the backrest is rotatably connected to the seat cushion, and the shock absorbing module is arranged between the seat cushion and the rear wheel bracket; An armrest frame is arranged on the backrest, and the armrest frame is rotatable.

10. The electric folding wheelchair according to claim 1, characterized in that: The seat comprises a seat cushion and a backrest, the backrest is rotatably connected to the seat cushion, and the shock absorbing module is arranged between the seat cushion and the rear wheel bracket; A fixing tube is provided at the bottom of the seat cushion, the extension direction of the fixing tube is parallel to the rotation axis of the backrest, and armrest mounting tubes are detachably inserted at both ends of the fixing tube along the extension direction thereof, and an armrest frame is provided on the armrest mounting tube; The cross sections of the fixing tube and the handrail mounting tube are both square.

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