A shock-absorbing electric wheelchair

Abstract

The present invention relates to a transportation tool for patients or disabled persons, specifically a shock-absorbing electric wheelchair, comprising: a connecting seat fixedly connected to both sides of a base; a hinge seat a fixedly connected to the lower part of the connecting seat; a connecting frame a rotatably connected to the hinge seat a; a hinge seat b arranged on each connecting seat; a hinge seat c fixedly connected to each connecting frame a; a telescopic rod rotatably connected between the hinge seat b and the hinge seat c, wherein a right-angled triangle is formed between the telescopic rod, the connecting frame a and the connecting seat, and the telescopic rod is located on the hypotenuse of the triangle. The present invention performs shock-absorbing treatment on the shock-absorbing electric wheelchair obliquely by making the shock-absorbing spring, and when the shock-absorbing spring reacts back to the frame, the force in the up-down direction and the front-back direction is decomposed, and the force in the front-back direction is offset by the driving force, leaving only the force in the up-down direction, thereby achieving the purpose of improving the shock-absorbing effect.

Description

Technical Field

[0001] The invention relates to a special transport tool for patients or disabled persons, in particular to a shock-absorbing electric wheelchair. Background Art

[0002] A wheelchair is a means of transportation designed for patients or disabled people, mainly consisting of a frame, wheels, and seats. An electric wheelchair uses electricity to drive the wheels of the wheelchair to rotate, achieving automatic movement of the wheelchair, thereby greatly reducing the burden on patients or disabled people.

[0003] When a wheelchair is moving, it is inevitable to encounter some rough roads. In order to improve the comfort of the user, the wheelchair is often treated with shock absorption. The most commonly used method is to separate the wheels from the main frame of the wheelchair and connect them with shock-absorbing elastic parts. In this way, on uneven roads, the wheels can follow the changes in the road surface, and the shock-absorbing elastic parts absorb the impact force generated by this part of the change, thereby reducing the bumpiness of the main frame of the wheelchair.

[0004] However, it is obvious that in this shock absorption method, the restoring force of the shock-absorbing elastic part after deformation is also bidirectional, and the main frame of the wheelchair will be subjected to the upward reaction force of the shock-absorbing elastic part, which causes the wheelchair and its user to still be affected to a certain extent by the uneven ground. Therefore, the shock absorption effect of the existing wheelchair is poor. Summary of the invention

[0005] In view of the defects of the prior art, the present invention proposes a shock-absorbing electric wheelchair capable of improving the shock-absorbing effect. The technical solution is as follows:

[0006] A shock-absorbing electric wheelchair comprises: a frame; a controller fixedly connected to the frame; a base fixedly connected to the bottom of the frame; mounting rings arranged on both sides of the base; wheels rotatably connected to the mounting rings; a seat cushion fixedly connected to the frame; a servo motor a fixedly connected to the frame, the servo motor a is connected to the wheels, and the servo motor a is electrically connected to the controller; and further comprises: a connecting seat fixedly connected to both sides of the base; a hinge seat a fixedly connected to the lower part of the connecting seat; a connecting frame a rotatably connected to the hinge seat a, the end of the connecting frame a is fixed to the mounting ring so that each connecting frame a is connected to each wheel in a one-to-one correspondence; a hinge seat b arranged on each connecting seat; a hinge seat c fixedly connected to each connecting frame a; a telescopic rod rotatably connected between the hinge seat b and the hinge seat c, a right-angled triangle is formed between the telescopic rod, the connecting frame a and the connecting seat, and the telescopic rod is located at the hypotenuse of the triangle; a convex ring fixedly connected to the two ends of each telescopic rod; and a shock-absorbing spring fixedly connected between the two convex rings.

[0007] Optionally, it also includes: a rotating shaft a rotatably connected to the bottom of the frame; a bevel gear a fixedly connected to the rotating shaft a and the output end of the servo motor a, the two bevel gears a are meshed, so that the servo motor a drives the rotating shaft a to rotate; a universal joint a is arranged between the rotating shaft a and the wheel, one end of the universal joint a is fixedly connected to the wheel, and the other end is fixedly connected to the rotating shaft a, so that the rotating shaft a drives the wheel to rotate.

[0008] Optionally, the number of universal joints a between the rotating shaft a and the wheel is at least one; and the invention also includes: a telescopic sleeve a fixedly connected between the two connected universal joints a, the telescopic sleeve a being provided with two ends, the two ends of the telescopic sleeve a being respectively fixed to one end of each of the two universal joints a, and the two ends of the telescopic sleeve a being key-connected.

[0009] Optionally, the hinge seat b is slidably connected to the connecting seat; it also includes: a rotating shaft b rotatably connected to the bottom of the base; a turntable fixedly connected to the rotating shaft b; a rotating shaft c rotatably connected to the connecting seat; bevel gears b fixedly connected to the rotating shaft b and the rotating shaft c respectively, the two bevel gears b are meshed with each other, so that the rotating shaft b can drive the rotating shaft c to rotate; a screw rotatably connected to the connecting seat, and the screw is threadedly connected to the hinge seat b.

[0010] Optionally, the seat cushion includes: a bottom cushion fixedly connected to the frame; a spacer arranged on the top of the bottom cushion;

[0011] It also includes: airbags fixedly connected to the bottom cushion, the number of airbags is consistent with the number of wheels, and the positions of the airbags correspond to the positions of the wheels, and a spacer is fixedly connected to the top of the airbag; a liquid storage tank fixedly connected to each connecting seat; a support sleeve fixedly connected to the bottom of the seat cushion; a connecting pipe fixedly connected to the support sleeve, one end of the connecting pipe is connected to the liquid storage tank; a flow tube fixedly connected to the bottom cushion, the other end of the connecting pipe is connected to the flow tube, the flow tube is connected to the connecting pipe and the airbags at the opposite position, and the flow tube does not allow the connecting pipes to communicate with each other; a piston slidably connected to the liquid storage tank, the end of the piston is arranged outside the liquid storage tank; a top block fixedly connected to the connecting frame a, the rotation of the connecting frame a will drive the top block to contact the piston.

[0012] Optionally, it also includes: a mounting frame fixedly connected to the bottom of the frame; a servo motor b fixedly connected in the mounting frame, the servo motor b is electrically connected to the controller; a rotating shaft d rotatably connected in the mounting frame; a gear fixedly connected to the output end of the servo motor b and the rotating shaft d, the two gears are meshed, so that the servo motor b drives the rotating shaft d to rotate; a connecting shaft fixedly connected to the mounting ring; a connecting frame b rotatably connected to the mounting ring; a telescopic sleeve b rotatably connected to the connecting frame b, the telescopic sleeve b is provided with two ends, the two ends of the telescopic sleeve b are key-connected, and the telescopic sleeve b has only one end on the connecting frame b; a bevel gear c fixedly connected to the telescopic sleeve b and the connecting shaft, the two bevel gears c are meshed with each other, and the bevel gear c on the telescopic sleeve b is arranged on the end of the telescopic sleeve b on the connecting frame b; a universal joint c fixedly connected to the rotating shaft d and the telescopic sleeve b.

[0013] Optionally, it also includes: a brake member fixedly connected to the frame, the brake member cooperates with the wheel to control the shock-absorbing electric wheelchair to stop, and the brake member is connected to the controller so as to be controlled by the controller.

[0014] Optionally, the brake component includes: a rotating plate rotatably connected to the bottom of the frame; a resisting shaft fixedly connected to the end of the rotating plate, the resisting shaft is located between the wheel hubs, and the rotating plate can rotate to press the resisting shaft against the wheel hubs; torsion springs connected between the rotating plate and the frame; a brake line arranged between the controller and the rotating plate, and the controller can control the self-rotation of the rotating plate through the brake line.

[0015] The present invention is provided with a connecting seat, a connecting frame a and a telescopic rod which are connected in a shape similar to a right triangle, and the telescopic rod is arranged on the hypotenuse of the triangle, and a shock-absorbing spring is arranged on the telescopic rod, so that the shock-absorbing spring obliquely absorbs the shock of the shock-absorbing electric wheelchair, and when the shock-absorbing spring reacts back to the frame, the force in the up-down direction and the front-back direction is decomposed, and the force in the front-back direction is offset by the driving force, and only the force in the up-down direction remains, thereby achieving the purpose of improving the shock-absorbing effect.

[0016] The present invention is capable of adjusting the equivalent elastic coefficient of the shock-absorbing spring, so that the present invention can be adapted to users of different weights, thereby improving the scope of use of the present invention; the present invention is capable of maintaining a horizontal seat cushion by providing an air bag whose expansion is controlled by the up and down movement of the wheel, so that the user can sit on the seat cushion more stably, thereby preventing the user from losing balance and improving the riding safety of the user; the present invention is capable of controlling the steering of the shock-absorbing electric wheelchair, such that the control of the shock-absorbing electric wheelchair is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a separation diagram of the connection structure of the frame, base and wheels in the present invention.

[0019] Figure 3 It is a schematic diagram of the connection structure between the servo motor a and the wheel and the connection structure of the brake member in the present invention.

[0020] Figure 4 It is a schematic diagram of the connection structure of the connecting seat, the connecting frame a, the telescopic rod and the shock-absorbing spring in the present invention.

[0021] Figure 5 It is a schematic diagram of the position structure of hinge seat a, hinge seat b and hinge seat c in the present invention.

[0022] Figure 6 It is a schematic diagram of the position structure of the rotating shaft b, the screw rod and the universal joint b in the present invention.

[0023] Figure 7 It is a schematic diagram of the connection structure of the rotating shaft c, bevel gear b, screw rod and universal joint b in the present invention.

[0024] Figure 8 This is a separation diagram of the connection structure of the airbag, liquid storage tank, connecting pipe and flow pipe in the present invention.

[0025] Fig. 9 It is a schematic diagram of the matching structure of the connecting frame a, the liquid storage bin, the piston and the top block in the present invention.

[0026] Fig.10 It is a schematic diagram of the position structure of the universal joint c, the telescopic sleeve b and the connecting shaft in the present invention.

[0027] Fig.11 It is a schematic diagram of the connection structure of the rotating shaft d, the telescopic sleeve b and the connecting shaft in the present invention.

[0028] The marks in the attached drawings are: 11-frame, 1101-handrail, 1102-pedal, 1103-controller, 1104-support plate, 12-base, 13-mounting ring, 14-wheel, 15-seat cushion, 1501-bottom pad, 1502-spacer, 16-brake member, 1601-rotating plate, 1602-resistance shaft, 1603-torsion spring, 1604-brake line, 17-mounting frame, 21-servo motor a, 2101-protective frame, 22-rotating shaft a, 23-bevel gear a, 24-universal joint a, 25-telescopic sleeve a, 31-connecting seat, 3101-hinge seat a, 3102-hinge seat b, 3103-hinge seat c , 3104-slide rail, 32-connecting frame a, 33-telescopic rod, 3301-mother rod, 3302-sub rod, 3303-convex ring, 34-shock-absorbing spring, 41-rotating shaft b, 4101-connecting plate, 4102-turntable, 42-rotating shaft c, 43-bevel gear b, 44-screw, 45-universal joint b, 51-air bag, 52-liquid storage tank, 53-connecting pipe, 5301-support sleeve, 54-flow pipe, 55-piston, 56-top block, 61-servo motor b, 62-rotating shaft d, 63-gear, 64-universal joint c, 65-telescopic sleeve b, 66-connecting frame b, 67-connecting shaft, 68-bevel gear c. DETAILED DESCRIPTION

[0029] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects of the present invention, the following is a detailed description in combination with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present invention, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present invention.

[0030] Embodiment: A shock-absorbing electric wheelchair, see Figure 1-Figure 2 , including: a frame 11, which is the main frame of the shock-absorbing electric wheelchair; an armrest 1101 fixedly installed on the rear side of the frame 11, and a second-party operator can use the armrest 1101 to control the shock-absorbing electric wheelchair; a controller 1103 fixedly installed on both sides of the frame 11, and a user controls the shock-absorbing electric wheelchair through the controller 1103; a pedal 1102 fixedly installed on the bottom of the front side of the frame 11, and the pedal 1102 is for the first-party user to place his legs and feet; a support plate 1104 fixedly installed on the bottom of the front side of the frame 11, and the support plate 1104 is located behind the pedal plate 1102 to support the user's legs, and the pedal plate 1102 and the support plate 1104 are both used to improve the riding comfort of the user.

[0031] See also Figure 1-Figure 2, including: a base 12 fixedly mounted on the bottom of a frame 11; mounting rings 13 arranged on both sides of the base 12, four mounting rings 13 are arranged, respectively arranged on the left and right sides of the base 12; wheels 14 rotatably mounted on each mounting ring 13, and the movement function of the shock-absorbing electric wheelchair can be realized by rotating the wheels 14; a seat cushion 15 fixedly mounted on the frame 11, and the seat cushion 15 is for the user to sit on; a brake member 16 fixedly mounted on the frame 11, and the brake member 16 cooperates with the wheel 14 to control the shock-absorbing electric wheelchair to stop, and the brake member 16 is connected to the controller 1103 on the right.

[0032] See also Figure 3 The brake member 16 includes: a rotating plate 1601 rotatably mounted on the bottom of the frame 11; a resisting shaft 1602 fixedly mounted on the end of the rotating plate 1601, the resisting shaft 1602 is located between the wheel hubs of the wheels 14, and the rotation of the rotating plate 1601 will cause the resisting shaft 1602 to resist the wheel hubs of the wheels 14; a torsion spring 1603 sleeved on the axis of the rotating plate 1601, the torsion spring 1603 is fixed between the rotating plate 1601 and the frame 11; a brake line 1604 fixedly connected between the right controller 1103 and the rotating plate 1601, the right controller 1103 is slidably connected to the frame 11, and sliding the right controller 1103 can control the movement of the brake line 1604. Use the controller 1103 to pull the brake line 1604 to control the rotation of the rotating plate 1601. The torsion spring 1603 is twisted and deformed, so that the axle 1602 presses against the hub of the wheel 14, and the rotation of the wheel 14 can be decelerated by friction until the wheel 14 stops. After releasing the controller 1103, the torsion spring 1603 rotates back to the rotating plate 1601 to reset, driving the brake line 1604 to return to its original position, and the axle 1602 leaves the hub of the wheel 14.

[0033] See also Figure 3, further comprising: a servo motor a21 fixedly mounted on the rear side of the bottom of the frame 11, the servo motor a21 being electrically connected to the controller 1103 on the left; a protective frame 2101 fixedly mounted on the rear side of the bottom of the frame 11, the protective frame 2101 being sleeved outside the output end of the servo motor a21; a rotating shaft a22 rotatably mounted in the protective frame 2101; a bevel gear a23 fixedly mounted on the rotating shaft a22 and on the output end of the servo motor a21, the two bevel gears a23 being meshed with each other, so that the servo motor a21 can drive the rotating shaft a22 to rotate; a universal joint a24 arranged between the rotating shaft a22 and the rear wheel 14, Two universal joints a24 are provided, and one ends of the two universal joints a24 are connected to each other, and the other ends of the two universal joints a24 are fixedly installed with the wheels 14 and the rotating shaft a22 respectively. The two universal joints a24 provided as above are installed between the left and right ends of the rotating shaft a22 and the two wheels 14 at the rear side; a telescopic sleeve a25 is fixedly installed between the two connected universal joints a24, and the telescopic sleeve a25 is provided with two ends, and the two ends are respectively fixed with one end of the two universal joints a24, and the two ends of the telescopic sleeve a25 are key-connected, so that the two connected universal joints a24 are slidably installed and can transmit rotation between them.

[0034] The servo motor a21 is started, and the servo motor a21 can drive the two rear wheels 14 to rotate synchronously, thereby realizing the automatic movement of the shock-absorbing electric wheelchair. A plurality of universal joints a24 are provided, so that the transmission between the servo motor a21 and the wheel 14 can be deformed in multiple stages according to the position change of the wheel 14. In this way, no matter what position change occurs to the wheel 14, the servo motor a21 can still maintain the transmission to the wheel 14 without being affected; the telescopic sleeve a25 provides a variation space for the deformation of the universal joint a24, so that each universal joint a24 component can remain connected during the deformation process.

[0035] See also Figure 1 , Figure 4 , Figure 5 and Figure 7, and further includes: a connecting seat 31 fixedly mounted on the left and right sides of the base 12, a total of four connecting seats 31 are provided, and the positions of the four wheels 14 correspond to the positions of the four connecting seats 31 respectively; a hinge seat a3101 fixedly mounted at the lower part of each connecting seat 31; a connecting frame a32 rotatably mounted on each hinge seat a3101, and the ends of each connecting frame a32 are respectively fixed to each mounting ring 13; a hinge seat b3102 provided on each connecting seat 31; a hinge seat c3103 fixedly mounted on the connecting frame a32; a telescopic rod 33 rotatably mounted between the hinge seat b3102 and the hinge seat c3103, and the telescopic rod 3 3 is composed of a mother rod 3301 and a sub-rod 3302, the mother rod 3301 and the sub-rod 3302 are slidably installed, the mother rod 3301 is rotatably installed on the hinge seat c3103, and the sub-rod 3302 is rotatably installed on the hinge seat b3102. The telescopic rod 33, the connecting frame a32 and the connecting seat 31 form a right-angled triangle, and the telescopic rod 33 is located at the hypotenuse of the triangle; convex rings 3303 are respectively fixedly installed on the mother rod 3301 and the sub-rod 3302; and the shock-absorbing spring 34 is sleeved on the mother rod 3301 and the sub-rod 3302, and the shock-absorbing spring 34 is fixed between the two convex rings 3303.

[0036] When the shock-absorbing electric wheelchair travels on a rugged road, the uneven ground will push the wheel 14 to move up and down, and the wheel 14 will drive the connecting frame a32 to rotate. When the wheel 14 moves up, the connecting frame a32 rotates upward, the telescopic rod 33 is compressed, the mother rod 3301 and the child rod 3302 slide toward each other, and the shock-absorbing spring 34 is compressed by force, so that the force when the wheel 14 moves up can be absorbed without directly acting on the frame 11. Similarly, when the wheel 14 moves down, the connecting frame a32 rotates downward, the shock-absorbing spring 34 recovers its deformation and pushes the telescopic rod 33 to extend. Therefore, during the whole process, under the action of the four shock-absorbing springs 34, the frame 11 can move up and down without completely following the up and down movement of the wheel 14, so that the passengers on the wheel 11 can move up and down without completely following the up and down movement of the wheel 14. The user on the frame 11 can maintain a relatively stable height while walking, thereby reducing the degree of bumping during the use of the shock-absorbing electric wheelchair; and when the shock-absorbing spring 34 is deformed, since the shock-absorbing spring 34 is on the hypotenuse of the triangle formed by the telescopic rod 33, the connecting frame a32 and the connecting seat 31, the force of the shock-absorbing spring 34 acting on the frame 11 is decomposed into forces in the up and down directions and forces in the front and back directions, and the forces in the front and back directions will be offset by the driving force when the shock-absorbing electric wheelchair is moving, then the reaction force of the shock-absorbing spring 34 can only be transmitted to the frame 11 in the up and down directions, thereby greatly reducing the bumpy feeling of the shock-absorbing spring 34 acting on the frame 11, thereby improving the shock-absorbing effect of the shock-absorbing electric wheelchair.

[0037] See also Figure 1 , Figure 6 and Figure 7The connecting seat 31 is provided with a slide rail 3104, and the hinge seat b3102 is slidably connected to the connecting seat 31 through the slide rail 3104, and also includes: a connecting plate 4101 fixedly installed at the bottom of the base 12; a rotating shaft b41 rotatably installed on the connecting plate 4101; a rotating disk 4102 fixedly installed on the rotating shaft b41; a rotating shaft c42 rotatably installed in the connecting seat 31; bevel gears b43 respectively fixedly installed on the rotating shaft b41 and the rotating shaft c42, and the two bevel gears b43 are meshed with each other; a screw 4 rotatably installed in the slide rail 3104 4. The screw rod 44 is threadedly installed with the hinge seat b3102; the universal joint b45 is fixedly installed between the screw rod 44 and the rotating shaft c42, and the connecting frame a32 can only rotate relative to the connecting seat 31 at a certain angle. This angle is the maximum angle of rotation of the connecting frame a32 relative to the connecting seat 31 during shock absorption. In the initial state, under the action of the shock absorbing spring 34, the connecting frame a32 is located at the lowest angle position of the connecting seat 31, and when vibration occurs, the connecting frame a32 swings upward relative to the connecting seat 31, and the shock absorbing spring 34 will be further compressed relatively, thereby achieving a shock absorption effect.

[0038] Initially, the hinge seat b3102 is located near the telescopic rod 33, and the shock-absorbing spring 34 is in a compressed state. The rotating shaft b41 is rotated by the turntable 4102, and the rotating shaft b41 rotates the rotating shaft c42 through the bevel gear b43. The rotating shaft c42 then controls the rotation of the screw 44 through the universal joint b45, thereby controlling the hinge seat b3102 to slide in the direction away from the telescopic rod 33. Therefore, the telescopic rod 33 is stretched, and the compressed shock-absorbing spring 34 is slowly relaxed and reset, so that the equivalent elastic coefficient of the shock-absorbing spring 34 is "reduced". Similarly, by reversing the rotating shaft b41, the hinge seat b3102 can be controlled to slide in the direction close to the telescopic rod 33, and the shock-absorbing spring 34 is compressed. Therefore, when using the shock-absorbing electric wheelchair, the equivalent elastic coefficient of the shock-absorbing spring 34 can be adjusted according to the weight of the user. In this way, when using it, the reaction force of the shock-absorbing spring 34 on the user with lighter weight is reduced.

[0039] See also Figure 1 , Figure 8 and Fig. 9 The seat cushion 15 includes: a bottom cushion 1501 fixedly mounted on the frame 11; and a spacer 1502 arranged on the top of the bottom cushion 1501.

[0040] The seat cushion 15 also includes: an airbag 51 fixedly installed in the bottom cushion 1501, a spacer 1502 fixedly installed on the top of the airbag 51, four airbags 51 are arranged in the bottom cushion 1501 in the form of a four-square grid; a liquid storage tank 52 fixedly installed in the connecting seat 31, four liquid storage tanks 52 are arranged, corresponding to the four connecting seats 31 respectively; a support sleeve 5301 fixedly installed at the bottom of the seat cushion 15; a connecting pipe 53 fixedly connected to the supporting sleeve 5301, one end of the connecting pipe 53 is connected to the liquid storage tank 52; a liquid storage tank 52 fixedly installed in the bottom cushion 1501 The flow tube 54, the other end of the connecting tube 53 is connected to the flow tube 54, in particular, the flow tube 54 connects each connecting tube 53 and the airbag 51 opposite to it, for example, the flow tube 54 connects the left front connecting tube 53 with the right rear airbag 51, and so on, and the flow tube 54 does not make the connecting tubes 53 communicate with each other; the piston 55 is slidably installed in the liquid storage tank 52, and the end of the piston 55 is arranged outside the liquid storage tank 52; the top block 56 is fixedly installed on the connecting frame a32, and the rotation of the connecting frame a32 will drive the top block 56 to contact with the piston 55.

[0041] When the shock-absorbing electric wheelchair moves to a rugged area, assuming that the wheel 14 on the right front side is raised by the ground, that is, the wheel 14 is moved up, the connecting frame a32 rotates upward, so that the top block 56 squeezes the piston 55 downward, and the piston 55 presses the liquid in the liquid storage tank 52 into the airbag 51 on the left rear side through the connecting pipe 53 and the flow pipe 54, that is, the right front side of the bottom pad 1501 and the spacer 1502 is lifted up because of the wheel 14, and the airbag 51 drives the left rear side of the spacer 1502 to move up, so that the spacer 1502 remains horizontal, so that the user can sit on the seat cushion 15 more stably, avoid the user's imbalance, and improve the riding safety of the shock-absorbing electric wheelchair.

[0042] See also Figure 1 , Fig.10 and Fig.11, and also includes: a mounting frame 17 fixedly mounted on the front side of the bottom of the frame 11; a servo motor b61 fixedly mounted in the mounting frame 17, the servo click b is electrically connected to the controller 1103 on the right; a rotating shaft d62 rotatably mounted in the mounting frame 17; a gear 63 fixedly mounted on the output end of the servo motor b61 and the rotating shaft d62, the two gears 63 meshing with each other; a connecting shaft 67 fixedly mounted on the two mounting rings 13 on the front side; a connecting frame b66 rotatably mounted on the connecting shaft 67; a telescopic Sleeve b65, the telescopic sleeve b65 is provided with two ends, the two ends of the telescopic sleeve b65 are key-connected, and one of the ends is rotatably mounted on the connecting frame b66; a bevel gear c68 fixedly mounted on the telescopic sleeve b65 and the connecting shaft 67, the two bevel gears c68 are meshed with each other, and the bevel gear c68 on the telescopic sleeve b65 is located at the ends of the telescopic sleeve b65 and the connecting frame b66; a universal joint c64 fixedly mounted on the rotating shaft d62 and the telescopic sleeve b65, and the universal joint c64 is fixed to the end of the telescopic sleeve b65 that is not located on the connecting frame b66.

[0043] The servo motor b61 is started to rotate forward, and the rotating shaft d62 is driven to rotate through the gear 63. The rotating shaft d62 transmits the rotation of the telescopic sleeve b65 through the universal joint. The telescopic sleeve b65 rotates through the bevel gear transmission connecting shaft 67, thereby controlling the rotation of the mounting ring 13 and the wheel 14, changing the angle of the wheel 14 relative to the frame 11, and realizing the direction adjustment of the shock-absorbing electric wheelchair. Conversely, the servo motor b61 is controlled to rotate in the reverse direction to control the wheel 14 to rotate in the opposite direction. The arrangement of the telescopic sleeve b65 and the universal joint c64 enables the transmission between the rotating shaft d62 and the connecting shaft 67 to change synchronously with the position of the wheel 14, thereby ensuring the control connection of the servo motor b61 to the direction of the wheel 14.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A shock-absorbing electric wheelchair, comprising: A vehicle frame (11); a controller (1103) fixedly connected to the vehicle frame (11) for controlling the shock-absorbing electric wheelchair; a base (12) fixedly connected to the bottom of the vehicle frame (11); mounting rings (13) arranged on both sides of the base (12); wheels (14) rotatably connected to the mounting rings (13); a seat cushion (15) fixedly connected to the vehicle frame (11); a servo motor a (21) fixedly connected to the vehicle frame (11), the servo motor a (21) being connected to the wheel (14) to drive the wheel (14) to rotate, and the servo motor a (21) being electrically connected to the controller (1103); the vehicle frame is characterized in that it also includes: a connecting seat (31) fixedly connected to both sides of the base (12); a hinge seat a (3101) fixedly connected to the lower part of the connecting seat (31); a hinge seat a (3101) rotatably connected to the hinge seat a (3101); A connecting frame a (32), the end of which is fixed to the mounting ring (13), so that each connecting frame a (32) is connected to each wheel (14) in a one-to-one correspondence; a hinge seat b (3102) provided on each connecting seat (31); a hinge seat c (3103) fixedly connected to each connecting frame a (32); a telescopic rod (33) rotatably connected between the hinge seat b (3102) and the hinge seat c (3103), the telescopic rod (33) being able to telescope and change to change its own length, a right-angled triangle is formed between the telescopic rod (33), the connecting frame a (32) and the connecting seat (31), and the telescopic rod (33) is located at the hypotenuse of the triangle; a convex ring (3303) fixedly connected to the two ends of each telescopic rod (33); and a shock-absorbing spring (34) fixedly connected between the two convex rings (3303); A rotating shaft a (22) rotatably connected to the bottom of the vehicle frame (11); a bevel gear a (23) fixedly connected to the rotating shaft a (22) and the output end of the servo motor a (21), wherein the two bevel gears a (23) are meshed with each other, so that the servo motor a (21) drives the rotating shaft a (22) to rotate; a universal joint a (24) is arranged between the rotating shaft a (22) and the wheel (14), wherein one end of the universal joint a (24) is fixedly connected to the wheel (14), and the other end is fixedly connected to the rotating shaft a (22), so that the rotating shaft a (22) drives the wheel (14) to rotate; The number of the universal joints a (24) between the rotating shaft a (22) and the wheel (14) is at least one, so that the transmission between the servo motor a (21) and the wheel (14) can be multi-stage deformed; the telescopic sleeve a (25) is fixedly connected between the two connected universal joints a (24), the telescopic sleeve a (25) is provided with two ends, and the two ends are respectively fixed to one end of each of the two universal joints a (24), and the two ends of the telescopic sleeve a (25) are key-connected; the hinge seat b (3102) is slidably connected to the connecting seat (31); and the telescopic sleeve a (25) is also included: A rotating shaft b (41) is rotatably connected to the bottom of the base (12); a rotating disk (4102) is fixedly connected to the rotating shaft b (41); a rotating shaft c (42) is rotatably connected to the connecting seat (31); bevel gears b (43) are respectively fixedly connected to the rotating shaft b (41) and the rotating shaft c (42), and the two bevel gears b (43) are meshed with each other so that the rotating shaft b (41) can drive the rotating shaft c (42) to rotate; a screw rod (44) is rotatably connected to the connecting seat (31), and the screw rod (44) is threadedly connected to the hinge seat b (3102); The seat cushion (15) comprises: a bottom cushion (1501) fixedly connected to the frame (11); a spacer (1502) arranged on the top of the bottom cushion (1501); and further comprises: an air bag (51) fixedly connected to the bottom cushion (1501), the number of the air bags (51) being consistent with the number of the wheels (14), and the positions of the air bags (51) corresponding to the positions of the wheels (14), and the spacer (1502) being fixedly connected to the top of the air bags (51); a liquid storage tank (52) fixedly connected to each connecting seat (31); a support sleeve (5301) fixedly connected to the bottom of the seat cushion (15); and a connecting pipe (5301) fixedly connected to the supporting sleeve (5301). 3), one end of the connecting pipe (53) is connected to the liquid storage bin (52); a flow pipe (54) is fixedly connected to the bottom pad (1501), the other end of the connecting pipe (53) is connected to the flow pipe (54), the flow pipe (54) is connected to the connecting pipe (53) and the air bag (51) at the opposite position, and the flow pipe (54) does not allow the connecting pipes (53) to communicate with each other; a piston (55) is slidably connected to the liquid storage bin (52), and the end of the piston (55) is arranged outside the liquid storage bin (52); a top block (56) is fixedly connected to the connecting frame a (32), and the rotation of the connecting frame a (32) will drive the top block (56) to contact with the piston (55).

2. A shock-absorbing electric wheelchair according to claim 1, characterized in that: Also includes: A mounting frame (17) fixedly connected to the bottom of the vehicle frame (11); a servo motor b (61) fixedly connected to the mounting frame (17), the servo motor b (61) being electrically connected to the controller (1103); a rotating shaft d (62) rotatably connected to the mounting frame (17); a gear (63) fixedly connected to the output end of the servo motor b (61) and the rotating shaft d (62), the two gears (63) being meshed, so that the servo motor b (61) drives the rotating shaft d (62) to rotate; a connecting shaft (67) fixedly connected to the mounting ring (13); and a connecting frame b (66) rotatably connected to the mounting ring (13); A telescopic sleeve b (65) rotatably connected to a connecting frame b (66), wherein the telescopic sleeve b (65) is provided with two ends, wherein the two ends of the telescopic sleeve b (65) are key-connected, and only one end of the telescopic sleeve b (65) is on the connecting frame b (66); a bevel gear c (68) fixedly connected to the telescopic sleeve b (65) and a connecting shaft (67), wherein the two bevel gears c (68) are meshed with each other, and the bevel gear c (68) on the telescopic sleeve b (65) is arranged on the end of the telescopic sleeve b (65) on the connecting frame b (66); and a universal joint c (64) fixedly connected to a rotating shaft d (62) and the telescopic sleeve b (65).

3. A shock-absorbing electric wheelchair according to claim 2, characterized in that: Also includes: A brake member (16) is fixedly connected to the frame (11), and the brake member (16) cooperates with the wheel (14) to control the shock-absorbing electric wheelchair to stop. The brake member (16) is connected to the controller (1103) so as to be controlled by the controller (1103).

4. A shock-absorbing electric wheelchair according to claim 3, characterized in that: The brake member (16) comprises: a rotating plate (1601) rotatably connected to the bottom of the frame (11); an abutment shaft (1602) fixedly connected to the end of the rotating plate (1601), the abutment shaft (1602) being located between the wheel hubs of the wheels (14), and the rotating plate (1601) being rotated so as to abut the abutment shaft (1602) against the wheel hubs of the wheels (14); torsion springs (1603) each connected between the rotating plate (1601) and the frame (11); and a brake line (1604) arranged between the controller (1103) and the rotating plate (1601), and the controller (1103) being able to control the self-rotation of the rotating plate (1601) through the brake line (1604).

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