Reversible deformation type electric rehabilitation wheelchair

Abstract

The invention relates to a reversible deformation type electric rehabilitation wheelchair which comprises two oppositely distributed frameworks, the bottom of each framework is provided with a universal wheel and a power wheel, the size of the power wheel is larger than that of the universal wheel, each framework is provided with a power source connected with the power wheel, and the power source is connected with the power wheel. A horizontal reversing mechanism is fixedly arranged between the two frameworks, an assembly plate fixed to the horizontal reversing mechanism is arranged above the two frameworks, a seat plate is fixed to the assembly plate, and a leg support rotationally connected with the assembly plate is arranged between the two frameworks. A leg angle adjusting mechanism used for adjusting the angle of the leg support and enabling the leg support to rotate to the position above the framework is arranged between the assembling plate and the leg support, and a pedal is arranged at the lower end of each leg support. The electric wheelchair has the advantages that the electric wheelchair can be reversed and deformed, that is, the electric wheelchair can be switched between a front wheel driving type and a rear wheel driving type so as to be more suitable for the current environment, and the advantages of the electric wheelchair are fully exerted.

Description

Technical Field

[0001] The invention relates to the field of rehabilitation equipment, and in particular to a reversible and variable electric rehabilitation wheelchair. Background Art

[0002] Traditional common electric rehabilitation wheelchairs are divided into front-wheel drive and rear-wheel drive types. However, no matter it is front-wheel drive or rear-wheel drive, the size of the powered wheel in the electric wheelchair is larger than the size of the universal wheel. In terms of maneuverability, the front-wheel drive electric wheelchair has a powered wheel in the front, so the steering of this type of wheelchair is flexible and suitable for use indoors or in narrow spaces. It has good obstacle crossing performance and can easily cross small ditches and small bumps. The rear-wheel drive electric wheelchair has a powered wheel in the back, so the handling stability of this type of wheelchair is better and suitable for use on flat outdoor roads. It has strong power and strong climbing ability, but the turning radius is small. It is too large and not suitable for operation in narrow spaces. In terms of stability, the front-wheel drive electric wheelchair may not be as stable as the rear-wheel drive type on steep slopes or slippery roads, and is prone to unstable control. The rear-wheel drive electric wheelchair can provide greater traction and stability and is suitable for use on icy and snowy roads, but it may skid when the speed is too fast. Whether it is a front-wheel drive electric wheelchair or a rear-wheel drive electric wheelchair, after it is produced, its type cannot be changed, and it cannot be deformed according to the actual use environment to adapt to the current environment. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a reversible and variable electric rehabilitation wheelchair to overcome the deficiencies in the above-mentioned prior art.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A reversible and variable electric rehabilitation wheelchair comprises: two relatively distributed frames, each frame is provided with a universal wheel and a power wheel at the bottom, the size of the power wheel is larger than that of the universal wheel, each frame is provided with a power source connected to the power wheel, a horizontal reversing mechanism is fixed between the two frames, an assembly plate fixed to the horizontal reversing mechanism is arranged above the two frames, a seat plate is fixed on the assembly plate, a leg rest rotatably connected to the assembly plate is arranged between the two frames, a leg angle adjustment mechanism for adjusting the angle of the leg rest and allowing the leg rest to rotate to the top of the frame is provided between the assembly plate and the leg rest, and a foot pedal is provided at the lower end of each leg rest.

[0006] The beneficial effects of the present invention are:

[0007] When the environment is suitable for a front-wheel drive electric wheelchair, the leg rest is first lifted up through the leg angle adjustment mechanism, that is, the leg rest is rotated above the frame to ensure that the leg rest and the foot pedal do not affect the subsequent horizontal rotation of the seat plate, and then the assembly plate and the seat plate are controlled by the horizontal reversing mechanism to rotate 180° horizontally synchronously, and the leg rest also follows to complete the 180° horizontal rotation. At this time, the leg rest will be on the side close to the power wheel, and finally the leg rest can be put down again through the leg angle adjustment mechanism. In this state, the power wheel is in front and the universal wheel is in the back, that is, it is transformed into a front-wheel drive electric wheelchair;

[0008] When the environment is suitable for a rear-wheel drive electric wheelchair, the leg rest is first lifted up through the leg angle adjustment mechanism, that is, the leg rest is rotated above the frame to ensure that the leg rest and the foot pedal do not affect the subsequent horizontal rotation of the seat plate, and then the assembly plate and the seat plate are controlled by the horizontal reversing mechanism to rotate 180° horizontally synchronously, and the leg rest also follows to complete the 180° horizontal rotation. At this time, the leg rest will be on the side close to the universal wheel, and finally the leg rest can be put down again through the leg angle adjustment mechanism. In this state, the power wheel is at the rear and the universal wheel is at the front, that is, it is transformed into a rear-wheel drive electric wheelchair;

[0009] The electric wheelchair of the present invention can be transformed in a reversing manner, that is, it can be switched between a front-wheel drive type and a rear-wheel drive type, so as to be more suitable for the current environment and give full play to its advantages.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the power source is electrically connected to the controller and the power supply respectively, and a handle electrically connected to the controller is provided on one side of the assembly plate.

[0012] A further beneficial effect of the above is that the operation of the power source can be controlled by the handle, which is convenient for the patient to operate.

[0013] Furthermore, each frame is provided with a linear motion mechanism, and the horizontal reversing mechanism is respectively fixed to the two linear motion mechanisms, and the two linear motion mechanisms are used to control the horizontal reversing mechanism to reciprocate between the two frames along the length direction of the frames.

[0014] A further beneficial effect of adopting the above method is that during the reversing deformation process, the center of gravity of the wheelchair will change. In order to prevent the wheelchair from tilting forward or backward, the position of the horizontal reversing mechanism, the assembly plate, the seat plate, and the leg rest can be adjusted through the linear moving mechanism to adjust the center of gravity of the wheelchair to a suitable position to ensure the safety of the wheelchair.

[0015] Furthermore, the linear motion mechanism is a linear motion module, the rotary motor in the linear motion module is electrically connected to the controller and the power supply respectively, and the handle is provided with a switch button for controlling the action of the linear motion mechanism.

[0016] The above-mentioned further beneficial effect is that the action of the linear moving mechanism can be controlled by the switch button on the handle. For example, the rotary motor can be controlled to rotate forward, and the slider in the linear moving module can move forward on the screw rod; the rotary motor can be controlled to rotate reversely, and the slider in the linear moving module can move backward on the screw rod. This realizes the control of the horizontal reversing mechanism to move back and forth between the two frames along the length direction of the frames. The linear moving module is used as the linear moving mechanism, and its stability is relatively good.

[0017] Furthermore, the horizontal reversing mechanism includes: a base plate, both ends of which are respectively fixed to the sliders in the two linear moving modules, and a rotating disk with a lower surface higher than the frame is arranged above the base plate; the rotating disk is fixed to the base plate through a rotating self-locking mechanism, and stops under the self-locking action of the rotating self-locking mechanism after each horizontal rotation of 180°, and the assembly plate is fixed on the rotating disk.

[0018] A further beneficial effect of the above method is that the horizontal reversing mechanism is set to stop once each time the rotating disk is controlled to rotate horizontally by 180°, thereby ensuring the accuracy of the reversal.

[0019] Furthermore, the rotating self-locking mechanism is a self-locking motor, which is fixed under the base plate, the rotating disk is fixed to the main shaft of the self-locking motor, the self-locking motor is electrically connected to the controller and the power supply respectively, and the handle has a switch button for controlling the action of the self-locking motor.

[0020] The above further beneficial effect is that the action of the self-locking motor can be controlled by the switch button on the handle, and the self-locking motor starts and stops after rotating 180°, so as to ensure the accuracy of the commutation.

[0021] Furthermore, a back plate is arranged on the side of the seat plate away from the leg rest, the lower end of the back plate is rotatably connected to the seat plate, and a back angle adjustment mechanism is provided between the back plate and the seat plate.

[0022] A further beneficial effect of the above is that the angle of the back plate relative to the seat plate can be adjusted by the back angle adjustment mechanism, and when the back plate is adjusted to be horizontal or approximately horizontal, the wheelchair can allow the patient to lie flat.

[0023] Furthermore, one end of the seat plate close to the leg rest is rotatably connected to the mounting plate, and a hip angle adjustment mechanism for adjusting the seat angle is arranged between the mounting plate and the seat plate, and the hip angle adjustment mechanism is electrically connected to the controller and the power supply respectively, and a switch button for controlling the action of the hip angle adjustment mechanism is provided on the handle; an armrest is arranged on each side of the back plate, and each armrest includes: a fixed section and a movable section, the movable section is connected to the fixed section through a connecting piece, the fixed section of each armrest is fixed to the back plate, and the movable section of each armrest can be rotated to face the other armrest through the connecting piece.

[0024] The above further beneficial effects are: the action of the hip angle adjustment mechanism can be controlled by the switch button on the handle, for example, the hip angle adjustment mechanism can adjust the angle of the seat plate, and the patient can be adjusted from a sitting position to a standing position through the linkage of the hip angle adjustment mechanism and the back angle adjustment mechanism. At this time, the wheelchair can meet the adjustment of the three postures of standing, lying and sitting, which is beneficial for the patient to adjust his own posture according to rehabilitation needs, and also helps the patient to stand up and sit. In addition, for adjustment to the standing position, since the center of gravity of the wheelchair will be biased toward the patient's position as a whole when the patient stands, the wheelchair is not stable at this time. For this, the linear moving mechanism can be used to drive the horizontal reversing mechanism, the assembly plate, the seat plate and the back plate. , the leg rest moves in the other direction to adjust the center of gravity of the entire system, so as to ensure the stability of the wheelchair, prevent the patient in the standing position from tipping over with the wheelchair, and ensure safety. When it is an uphill section, the center of gravity of the patient in the wheelchair is relatively biased backward. At this time, the wheelchair is at risk of tipping over. The seat plate can be adjusted to a horizontal state through the hip angle adjustment mechanism to change the center of gravity and reduce the risk of tipping over. Under normal circumstances, the active section does not need to be rotated to face the other armrest. Only when the patient needs to be in a standing position on the wheelchair, the active section is rotated to face the other armrest to protect the patient. Of course, for uphill and downhill, you can choose to rotate the active section to face the other armrest.

[0025] Furthermore, the back angle adjustment mechanism includes: a solid screw, a hollow screw and a screw sleeve, the inner surface of the screw sleeve is provided with a thread, one end of the solid screw is threadedly connected to the screw sleeve, and the other end of the solid screw is rotatably connected to the side of the seat plate, one end of the hollow screw is threadedly connected to the screw sleeve, and the other end of the hollow screw is rotatably connected to the side of the back plate, the inner diameter of the hollow screw is larger than the outer diameter of the solid screw, and the outer surface of the screw sleeve is provided with anti-slip grooves.

[0026] The above-mentioned further beneficial effect is: when it is required to adjust the inclination angle of the back plate, the screw sleeve can be rotated to change the overall length of the system composed of the solid screw, the hollow screw and the screw sleeve. The back angle adjustment mechanism using this structure can achieve stepless adjustment within a predetermined angle range. The inner diameter of the hollow screw is larger than the outer diameter of the solid screw. During the adjustment process, the solid screw can enter the hollow screw, thereby eliminating the need to design an overly long screw sleeve, which can reduce the length of the screw sleeve.

[0027] Furthermore, the leg angle adjustment mechanism consists of two first electric push rods, the rod end of the first electric push rod is rotatably connected to the leg rest, the rod body end of the first electric push rod is rotatably connected to the assembly plate, the first electric push rods are electrically connected to the controller and the power supply, respectively, and the handle has a switch button for controlling the action of the first electric push rod.

[0028] The above-mentioned further beneficial effects are: the action of the first electric push rod can be controlled by the switch button on the handle, for example, the first electric push rod can be controlled to extend and retract to realize the control of the rotation of the leg rest, thereby completing the angle adjustment of the leg rest. The leg angle adjustment mechanism adopts the first electric push rod, which is convenient for linkage with the hip angle adjustment mechanism. Of course, for patients who need to perform appropriate leg activities, by controlling the first electric push rod to extend and retract, the legs can be lifted and lowered under the action of the leg rest, and the operation can be repeated, so that the patient can achieve appropriate leg activities. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a first perspective view of the reversible and variable electric rehabilitation wheelchair of the present invention;

[0030] Figure 2 A second viewing angle diagram of the reversible and variable electric rehabilitation wheelchair of the present invention;

[0031] Figure 3 A third perspective view of the reversible and variable electric rehabilitation wheelchair of the present invention;

[0032] Figure 4 This is a fourth viewing angle of the reversible and variable electric rehabilitation wheelchair of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Skeleton, 2. Horizontal reversing mechanism, 210. Bottom plate, 220. Rotating disk, 230. Rotating self-locking mechanism, 3. Armrest, 310. Fixed section, 320. Movable section, 330. Connector, 4. Back angle adjustment mechanism, 410. Solid screw, 420. Hollow screw, 430. Screw sleeve, 5. Linear moving mechanism, 6. Power wheel, 7. Power source, 8. Assembly plate, 9. Seat plate, 10. Leg support, 11. Leg angle adjustment mechanism, 12. Foot pedal, 13. Controller, 14. Power supply, 15. Handle, 16. Back plate, 17. Universal wheel, 18. Hip angle adjustment mechanism. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] Example 1

[0037] like Figure 1 to Figure 4As shown, a reversible and deformable electric rehabilitation wheelchair comprises: two relatively distributed frames 1, the frames 1 can be welded, cut or assembled by plates, can also be welded by pipes, can also be assembled or welded by a mixture of pipes and plates, each frame 1 is provided with a universal wheel 17 and a power wheel 6 at the bottom, the size of the power wheel 6 is larger than that of the universal wheel 17, the universal wheel 17 and the power wheel 6 are both made of existing technology, each frame 1 is provided with a power source 7 connected to the power wheel 6, that is, the power source 7 can drive the power wheel 6 to rotate, so as to enable the wheelchair to move on the road, the above technology is an existing mature technology, so it will not be described in detail here, the installation position of the power source 7 is required not to affect the reversing deformation of the electric wheelchair, that is, the installation position of the power source 7 does not interfere with the leg support 10, the structure shown in the figure is only an exemplary description, not the only installation state;

[0038] A horizontal reversing mechanism 2 is fixed between the two frames 1. Some reinforcing rods can be added between the two frames 1. The two ends of the reinforcing rods are fixedly connected to the two frames 1 to prevent the two frames 1 from falling apart from the horizontal reversing mechanism 2. An assembly plate 8 fixed to the horizontal reversing mechanism 2 is arranged above the two frames 1. When the horizontal reversing mechanism 2 is in operation, the assembly plate 8 can be rotated in the horizontal direction. The assembly plate 8 is not interfered by the frame 1 during the 180° or 360° rotation in the horizontal direction. A seat plate 9 is fixed on the assembly plate 8. During the actual use of the wheelchair, the patient sits on the seat plate 9. A seat plate 9 rotating with the assembly plate 8 is arranged between the two frames 1. A leg rest 10 is connected to the wheelchair, and a leg angle adjustment mechanism 11 is provided between the assembly plate 8 and the leg rest 10. The leg angle adjustment mechanism 11 is used to adjust the angle of the leg rest 10, and the leg angle adjustment mechanism 11 can allow the leg rest 10 to rotate above the frame 1 during the process of adjusting the angle of the leg rest 10. When the leg rest 10 rotates above the frame 1, it is required that the subsequent leg rest 10 is not interfered by the frame 1 during the horizontal rotation of 180° or 360° with the assembly plate 8. A foot pedal 12 is provided at the lower end of each leg rest 10. The foot pedal 12 is used for the patient to step on it when sitting on the wheelchair, and for the patient to stand on it when the wheelchair is changed to a standing position;

[0039] When the environment is suitable for a front-wheel drive electric wheelchair, the leg rest 10 is first lifted up through the leg angle adjustment mechanism 11, that is, the leg rest 10 is rotated above the frame 1 to ensure that the leg rest 10 and the foot pedal 12 do not affect the subsequent horizontal rotation of the seat plate 9, and then the assembly plate 8 and the seat plate 9 are controlled by the horizontal reversing mechanism 2 to synchronously rotate horizontally by 180°, and the leg rest 10 also follows to complete the 180° horizontal rotation, 180° can be clockwise or counterclockwise, which is not clearly defined here, at this time, the leg rest 10 will be on the side close to the power wheel 6, and finally the leg rest 10 can be put down again through the leg angle adjustment mechanism 11, in this state the power wheel 6 is in front and the universal wheel 17 is in the back, that is, it is transformed into a front-wheel drive electric wheelchair;

[0040] When the environment is suitable for a rear-wheel drive electric wheelchair, the leg rest 10 is first lifted up through the leg angle adjustment mechanism 11, that is, the leg rest 10 is rotated above the frame 1 to ensure that the leg rest 10 and the foot pedal 12 do not affect the subsequent horizontal rotation of the seat plate 9, and then the assembly plate 8 and the seat plate 9 are controlled by the horizontal reversing mechanism 2 to synchronously rotate horizontally by 180°, and the leg rest 10 also follows to complete the 180° horizontal rotation. 180° can be clockwise or counterclockwise, which is not clearly defined here. At this time, the leg rest 10 will be on the side close to the universal wheel 17. Finally, the leg rest 10 can be put down again through the leg angle adjustment mechanism 11. In this state, the power wheel 6 is at the back and the universal wheel 17 is at the front, that is, it is transformed into a rear-wheel drive electric wheelchair;

[0041] Before the deformation, if the wheelchair is a front-wheel drive electric wheelchair, and it is deformed after being rotated 180° clockwise horizontally, then when it is transformed back into a rear-wheel drive electric wheelchair, it is best to rotate 180° counterclockwise horizontally, so that the horizontal reversing mechanism 2 actually only needs to rotate within the range of 0° to 180°, and does not need to rotate 360°, which is beneficial to subsequent wiring;

[0042] In summary, the electric wheelchair in the present invention can be transformed in reverse direction, that is, it can be switched between the front-wheel drive type and the rear-wheel drive type, so as to be more suitable for the current environment and give full play to its advantages.

[0043] Example 2

[0044] like Figure 1 to Figure 4 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0045] The power source 7 is electrically connected to the controller 13 and the power supply 14 respectively. The power supply 14 provides electrical energy for the power source 7, and the controller 13 can control the action of the power source 7. A handle 15 electrically connected to the controller 13 is provided on one side of the assembly plate 8, that is, through the handle 15, the start and stop of the power source 7 and the running speed can be controlled, so as to achieve acceleration, deceleration, constant speed, steering, walking and retreating. This part of the technology is a function possessed by existing electric wheelchairs, so it will not be described in detail here. The power source 7 can control the forward and reverse rotation of the power wheel 6. The power source 7 can be a motor, a combination of a motor and a reducer, a combination of a motor + a reducer + a transmission chain, or a combination of a motor + a transmission chain. The dynamic chain can be a belt drive, a gear drive, a sprocket drive, etc. For example: when the wheelchair is a rear-wheel drive type, the two power sources 7 simultaneously control the two power wheels 6 to rotate forward, so the wheelchair moves forward, and the two power sources 7 simultaneously control the two power wheels 6 to rotate reversely, so the wheelchair moves backward; when the wheelchair is a front-wheel drive type, the two power sources 7 simultaneously control the two power wheels 6 to rotate reversely, so the wheelchair moves forward, and the two power sources 7 simultaneously control the two power wheels 6 to rotate forward, so the wheelchair moves backward; when the two power sources 7 control the two power wheels 6 to rotate forward or reverse at different speeds respectively, the wheelchair can be turned; the controller 13 and the power supply 14 can be arranged below the horizontal reversing mechanism 2 and fixed between the two frames 1 via a bracket.

[0046] Example 3

[0047] like Figure 1 to Figure 4 As shown, this embodiment is a further improvement on the basis of embodiment 2, and the details are as follows:

[0048] A linear moving mechanism 5 is provided on each frame 1, that is, the entire wheelchair has two linear moving mechanisms 5, and the horizontal reversing mechanisms 2 are respectively fixed to the two linear moving mechanisms 5. The two linear moving mechanisms 5 are used to control the horizontal reversing mechanisms 2 to reciprocate between the two frames 1 along the length direction of the frames 1. During the reversing deformation process, the center of gravity of the wheelchair will change. In order to prevent the wheelchair from tilting forward or backward, the position of the horizontal reversing mechanism 2, the assembly plate 8, the seat plate 9, and the leg rest 10 can be adjusted through the linear moving mechanism 5 to adjust the center of gravity of the wheelchair to a suitable position to ensure the safety of the wheelchair.

[0049] Furthermore, the linear motion mechanism 5 is a linear motion module, and the horizontal reversing mechanism 2 is fixedly connected to the sliders in the two linear motion modules. The rotating motor in the linear motion module is electrically connected to the controller 13 and the power supply 14 respectively. The handle 15 has a switch button for controlling the action of the linear motion mechanism 5, that is, the action of the linear motion mechanism 5 can be controlled by the switch button on the handle 15. For example, the rotating motor is controlled to rotate forward, and the slider in the linear motion module moves forward on the screw rod; the rotating motor is controlled to reverse, and the slider in the linear motion module moves backward on the screw rod, that is, the horizontal reversing mechanism 2 is controlled to reciprocate between the two skeletons 1 along the length direction of the skeleton 1. The linear motion module is used as the linear motion mechanism 5, and its stability is relatively good. Of course, in actual application, other structures are not excluded, such as an electric push rod. Then, the horizontal reversing mechanism 2 is slidably matched with the two skeletons 1, and the rod end of the electric push rod is fixed to the horizontal reversing mechanism 2.

[0050] Example 4

[0051] like Figure 3 , Figure 4 As shown, this embodiment is a further improvement on the basis of embodiment 3, and the details are as follows:

[0052] The horizontal reversing mechanism 2 includes: a base plate 210, both ends of the base plate 210 are respectively fixed to the sliders in the two linear moving modules, a rotating disk 220 with a lower surface higher than the skeleton 1 is arranged above the base plate 210, and the lower surface of the rotating disk 220 is higher than the skeleton 1, so when the rotating disk 220 rotates subsequently, the rotating disk 220 will not be interfered by the skeleton 1. In this embodiment, the rotating disk 220 is an ordinary disk, which does not have any self-rotation ability, and its rotation relies on other forces; the rotating disk 220 is fixed to the base plate 210 through a rotating self-locking mechanism 230, and stops under the self-locking action of the rotating self-locking mechanism 230 after each horizontal rotation of 180°, and the assembly plate 8 is fixed on the rotating disk 220.

[0053] Even if a linear motion module is used as the linear motion mechanism 5, the horizontal reversing mechanism 2 can be selected to slide with the two skeletons 1. In this case, the skeleton 1 is preferably made of plate materials welded, cut or assembled, and the structure for achieving sliding cooperation can be as follows: a slide groove is opened on the skeleton 1 along its length direction, and a T-shaped / dovetail slider is arranged on the outside of each skeleton 1. The T-shaped / dovetail slider is fixed to the bottom plate 210 in the horizontal reversing mechanism 2 after passing through the slide groove opened on the skeleton 1. By allowing the horizontal reversing mechanism 2 to slide with the two skeletons 1, the pressure load of the linear motion mechanism 5 (the gravity pressing on the linear motion mechanism 5) can be reduced.

[0054] Furthermore, the rotating self-locking mechanism 230 is a self-locking motor, which is fixed under the base plate 210. The rotating disk 220 is fixed to the main shaft of the self-locking motor. The self-locking motor is electrically connected to the controller 13 and the power supply 14 respectively. The handle 15 has a switch button for controlling the action of the self-locking motor, that is, the action of the self-locking motor can be controlled by the switch button on the handle 15, for example, the self-locking motor can be controlled to start and stop after rotating 180°. The self-locking motor is a prior art, and the rotation of the rotating disk 220 depends on the rotating self-locking mechanism 230.

[0055] Of course, in actual application, the use of a rotation self-locking mechanism 230 of other structures is not excluded. For example, the rotation self-locking mechanism 230 includes: an angle measuring device fixed between the base plate 210 and the rotating disk 220 and used to measure the rotation angle of the rotating disk 220, and an electric latch / pin fixed to the base plate 210. The rotating disk 220 is rotatably connected to the base plate 210 through a rotating shaft and a bearing. A positioning hole is respectively opened at 0° and 180° on the lower surface of the rotating disk 220. The latch / pin in the electric latch / pin is in the positioning hole at 0° or 180°. The angle measuring device is electrically connected to the controller 13 and the power supply 14 respectively. The electric latch / pin is electrically connected to the controller 13 and the power supply 14 respectively. The handle 15 has There is a switch button for controlling the action of the electric latch / pin. The action of the electric latch / pin is controlled by the switch button to allow the latch / pin of the electric latch / pin to disengage from the positioning hole, and rely on external force to control the rotation of the rotating disk 220. For example, a patient on a wheelchair grasps the frame 1 with both hands and relies on his own twisting force to control the rotation of the rotating disk 220. It can also be completed by relying on the power of an outsider. The rotation of the rotating disk 220 is only described exemplarily here. The rotation angle of the rotating disk 220 is then measured by an angle meter, and the measurement data is fed back to the controller 13. When the measured angle is 180°, the controller 13 controls the action of the electric latch / pin so that the latch / pin re-enters the positioning hole on the lower surface of the rotating disk 220, thereby completing the rotation self-locking.

[0056] Example 5

[0057] like Figure 1 to Figure 4 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 4, and the details are as follows:

[0058] A back panel 16 is arranged on the side of the seat panel 9 away from the leg rest 10, and the lower end of the back panel 16 is rotatably connected to the seat panel 9. The rotatable connection can be achieved by a rotating shaft, a hinge, etc. The rotation axis of the back panel 16 is parallel to the rotation axis of the leg rest 10. A back angle adjustment mechanism 4 is provided between the back panel 16 and the seat panel 9. The angle of the back panel 16 relative to the seat panel 9 can be adjusted by the back angle adjustment mechanism 4. During the adjustment process, the angle adjustment range of the back panel 16 is at least 90°, that is, the back panel 16 can be adjusted from a vertical state to a colinear state relative to the seat panel 9, that is, from a 90° position to a 180° position, that is, the back panel 16 can be adjusted to a horizontal state. When the back panel 16 is adjusted to be horizontal or approximately horizontal, the wheelchair can be used for the patient to lie flat.

[0059] Example 6

[0060] like Figure 1 to Figure 4 As shown, this embodiment is a further improvement on the basis of Embodiment 5, and the details are as follows:

[0061] One end of the seat plate 9 close to the leg rest 10 is rotatably connected to the assembly plate 8, and the rotatable connection can be achieved by a rotating shaft, a hinge, etc. The rotation axis of the seat plate 9 is parallel to the rotation axis of the leg rest 10. A hip angle adjustment mechanism 18 for adjusting the angle of the seat plate 9 is arranged between the assembly plate 8 and the seat plate 9. The hip angle adjustment mechanism 18 is electrically connected to the controller 13 and the power supply 14 respectively. A switch button for controlling the action of the hip angle adjustment mechanism 18 is provided on the handle 15, that is, the action of the hip angle adjustment mechanism 18 can be controlled by the switch button on the handle 15. For example, the hip angle adjustment mechanism 18 adjusts the angle of the seat plate 9. Through the linkage of the hip angle adjustment mechanism 18 and the back angle adjustment mechanism 4, the patient can be adjusted from a sitting position to a standing position. At this time, the wheelchair meets the adjustment of the three postures of standing, lying and sitting, which is beneficial for the patient to adjust his own posture according to rehabilitation needs, and also helps the patient Stand up and sit down. In addition, for adjusting to a standing position, since the center of gravity of the wheelchair will be biased toward the patient's position as a whole when the patient stands, the wheelchair is not stable at this time. For this reason, the linear moving mechanism 5 can be used to drive the horizontal reversing mechanism 2, the assembly plate 8, the seat plate 9, the back plate 16, and the leg support 10 to move in another direction to adjust the center of gravity position of the entire system, thereby ensuring the stability of the wheelchair and preventing the patient in the standing position from tipping over with the wheelchair to ensure safety. When it comes to uphill sections, the center of gravity of the patient on the wheelchair is relatively biased backward. At this time, there is a risk of tipping over. The seat plate 9 can be adjusted to a horizontal state through the hip angle adjustment mechanism 18 to change the center of gravity and reduce the risk of tipping over. In this embodiment, the hip angle adjustment mechanism 18 can use a second electric push rod. At this time, an avoidance groove can be designed on the assembly plate 8 to facilitate the installation of the second electric push rod while minimizing the impact on the seat plate 9.

[0062] An armrest 3 is arranged on each side of the back plate 16, and each armrest 3 includes: a fixed section 310 and a movable section 320. The movable section 320 is connected to the fixed section 310 through a connecting piece 330. The fixed section 310 of each armrest 3 is fixed to the back plate 16. The fixed section 310 and the back plate 16 can be connected by bolts, welding, clamping, etc. The movable section 320 of each armrest 3 can be rotated to face another armrest 3 through the connecting piece 330. Under normal circumstances, the movable section 320 does not need to be rotated to face another armrest 3. Only when the patient needs to be in a standing position on the wheelchair, the movable section 320 is rotated to face another armrest 3 to protect the patient. Of course, for uphill and downhill, the movable section 320 can be selected to be rotated to face another armrest 3. In the embodiment, the connecting member 330 can be a bolt, that is, the movable section 320 is connected to the fixed section 310 by a bolt. When the movable section 320 is rotated, the bolt is loosened, and after adjustment is in place, the bolt is tightened. This is very convenient and can achieve stepless adjustment within a predetermined angle range, which has better applicability. Of course, the connecting member 330 is only described as an example here, and other structures are not excluded in actual application. For example, the connecting member 330 includes: a rotating shaft, and the movable section 320 is rotatably connected to the fixed section 310 by the rotating shaft. Then, a strong magnet is provided on the fixed section 310 at the initial position and the target position of the movable section 320. At the same time, a strong magnet is also designed at the corresponding position on the movable section 320, and the suction force of the strong magnet is contacted to fix the movable section 320 at the initial position and the target position.

[0063] Example 7

[0064] like Figure 1 to Figure 4 As shown, this embodiment is a further improvement on the basis of Embodiment 5 or 6, and the details are as follows:

[0065] The back angle adjustment mechanism 4 includes: a solid screw 410, a hollow screw 420 and a screw sleeve 430, the inner surface of the screw sleeve 430 is provided with a thread, one end of the solid screw 410 is threadedly connected to the screw sleeve 430, and the other end of the solid screw 410 is rotatably connected to the side of the seat plate 9, one end of the hollow screw 420 is threadedly connected to the screw sleeve 430, and the other end of the hollow screw 420 is rotatably connected to the side of the back plate 16, the rotation axis of the solid screw 410 is parallel to the rotation axis of the hollow screw 420, the inner diameter of the hollow screw 420 is larger than the outer diameter of the solid screw 410, and the outer surface of the screw sleeve 430 is provided with anti-slip grooves. When it is required to adjust the inclination of the back plate 16 When the angle is inclined, the screw sleeve 430 is rotated to change the overall length of the system composed of the solid screw 410, the hollow screw 420 and the screw sleeve 430. The back angle adjustment mechanism 4 using this structure can achieve stepless adjustment within a predetermined angle range, and the inner diameter of the hollow screw 420 is larger than the outer diameter of the solid screw 410. During the adjustment process, the solid screw 410 can enter the hollow screw 420, so there is no need to design an overly long screw sleeve 430, that is, the length of the screw sleeve 430 can be reduced. Of course, in actual application, it is not ruled out that the back angle adjustment mechanism 4 is one or two electric push rods, or other structures. This is just an exemplary enumeration.

[0066] Example 8

[0067] like Figure 1 , Figure 3 , Figure 4 As shown, this embodiment is a further improvement on any one of Embodiments 2 to 7, and the details are as follows:

[0068] The leg angle adjustment mechanism 11 is composed of two first electric push rods, the rod end of the first electric push rod is rotatably connected to the leg rest 10, and the rod body end of the first electric push rod is rotatably connected to the assembly plate 8. The first electric push rods are electrically connected to the controller 13 and the power supply 14 respectively. The handle 15 is provided with a switch button for controlling the action of the first electric push rod, that is, the action of the first electric push rod can be controlled by the switch button on the handle 15, for example, the first electric push rod can be controlled to extend and retract to achieve the control of the rotation of the leg rest 10, thereby completing the angle adjustment of the leg rest 10. The leg angle adjustment mechanism 11 adopts the first electric push rod, which is convenient for linkage with the hip angle adjustment mechanism 18. Of course, for patients who need to perform appropriate leg activities, by controlling the first electric push rod to extend and retract, the legs can be lifted and put down under the action of the leg rest 10, and the operation can be repeated. The patient can achieve appropriate leg activities, which is beneficial to the patient's recovery.

[0069] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A reversible electric rehabilitation wheelchair, characterized in that: include: Two relatively distributed frames (1), each frame (1) is provided with a universal wheel (17) and a power wheel (6) at the bottom, the size of the power wheel (6) is larger than the size of the universal wheel (17), each frame (1) is provided with a power source (7) connected to the power wheel (6), a horizontal reversing mechanism (2) is fixed between the two frames (1), an assembly plate (8) fixed to the horizontal reversing mechanism (2) is arranged above the two frames (1), a seat plate (9) is fixed on the assembly plate (8), a leg rest (10) rotatably connected to the assembly plate (8) is arranged between the two frames (1), a leg angle adjustment mechanism (11) for adjusting the angle of the leg rest (10) and allowing the leg rest (10) to rotate to the top of the frame (1) is arranged between the assembly plate (8) and the leg rest (10), and a foot pedal (12) is provided at the lower end of each leg rest (10).

2. The reversible electric rehabilitation wheelchair according to claim 1, characterized in that: The power source (7) is electrically connected to the controller (13) and the power source (14) respectively, and a handle (15) electrically connected to the controller (13) is provided on one side of the assembly plate (8).

3. A reversible electric rehabilitation wheelchair according to claim 1 or 2, characterized in that: Each frame (1) is provided with a linear moving mechanism (5), and the horizontal reversing mechanism (2) is respectively fixed to the two linear moving mechanisms (5). The two linear moving mechanisms (5) are used to control the horizontal reversing mechanism (2) to reciprocate between the two frames (1) along the length direction of the frames (1).

4. The reversible and variable electric rehabilitation wheelchair according to claim 3, characterized in that: The linear motion mechanism (5) is a linear motion module. The rotary motor in the linear motion module is electrically connected to the controller (13) and the power supply (14) respectively. The handle (15) has a switch button for controlling the action of the linear motion mechanism (5).

5. The reversible and variable electric rehabilitation wheelchair according to claim 4, characterized in that: The horizontal reversing mechanism (2) comprises: a base plate (210), the two ends of the base plate (210) are respectively fixed to the sliders in the two linear moving modules, and a rotating disk (220) with a lower surface higher than the frame (1) is arranged above the base plate (210); the rotating disk (220) is fixed to the base plate (210) via a rotating self-locking mechanism (230), and stops under the self-locking action of the rotating self-locking mechanism (230) after each horizontal rotation of 180°, and the assembly plate (8) is fixed on the rotating disk (220).

6. The reversible and variable electric rehabilitation wheelchair according to claim 5, characterized in that: The rotating self-locking mechanism (230) is a self-locking motor, which is fixed below the bottom plate (210). The rotating disk (220) is fixed to the main shaft of the self-locking motor. The self-locking motor is electrically connected to the controller (13) and the power supply (14) respectively. The handle (15) has a switch button for controlling the action of the self-locking motor.

7. The reversible and variable electric rehabilitation wheelchair according to claim 2, characterized in that: A back plate (16) is arranged on the side of the seat plate (9) away from the leg support (10), the lower end of the back plate (16) is rotatably connected to the seat plate (9), and a back angle adjustment mechanism (4) is provided between the back plate (16) and the seat plate (9).

8. The reversible and variable electric rehabilitation wheelchair according to claim 7, characterized in that: One end of the seat plate (9) close to the leg support (10) is rotatably connected to the mounting plate (8), a hip angle adjustment mechanism (18) for adjusting the angle of the seat plate (9) is arranged between the mounting plate (8) and the seat plate (9), the hip angle adjustment mechanism (18) is electrically connected to the controller (13) and the power supply (14) respectively, and a switch button for controlling the action of the hip angle adjustment mechanism (18) is provided on the handle (15); An armrest (3) is arranged on each side of the back plate (16); each armrest (3) comprises a fixed section (310) and a movable section (320); the movable section (320) is connected to the fixed section (310) via a connecting piece (330); the fixed section (310) of each armrest (3) is fixed to the back plate (16); and the movable section (320) of each armrest (3) can be rotated to face another armrest (3) via the connecting piece (330).

9. A reversible electric rehabilitation wheelchair according to claim 7 or 8, characterized in that: The back angle adjustment mechanism (4) comprises: a solid screw (410), a hollow screw (420) and a screw sleeve (430); the inner surface of the screw sleeve (430) is provided with a thread; one end of the solid screw (410) is threadedly connected to the screw sleeve (430); the other end of the solid screw (410) is rotatably connected to the side of the seat plate (9); one end of the hollow screw (420) is threadedly connected to the screw sleeve (430); the other end of the hollow screw (420) is rotatably connected to the side of the back plate (16); the inner diameter of the hollow screw (420) is larger than the outer diameter of the solid screw (410); and the outer surface of the screw sleeve (430) is provided with anti-slip grooves.

10. A reversible electric rehabilitation wheelchair according to any one of claims 1 to 9, characterized in that: The leg angle adjustment mechanism (11) is composed of two first electric push rods, the rod ends of the first electric push rods are rotatably connected to the leg support (10), the rod body ends of the first electric push rods are rotatably connected to the assembly plate (8), the first electric push rods are electrically connected to the controller (13) and the power supply (14) respectively, and the handle (15) has a switch button for controlling the action of the first electric push rod.

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