Multifunctional stair climbing wheelchair

Abstract

The invention discloses a multifunctional stair climbing wheelchair which comprises a connecting seat, a buffering assembly fixedly connected to the inner surface of the connecting seat, a bottom plate fixedly connected to the upper end of the buffering assembly, a seat cushion fixedly connected to the upper surface of the bottom plate, a cushion plate fixedly connected to the upper surface of the bottom plate, and a back cushion fixedly connected to the front surface of the cushion plate. The side surface of the connecting base is fixedly connected with a supporting frame, the side surface of the supporting frame is rotationally connected with a rotating wheel, and the lower surface of the connecting base is fixedly connected with a limiting sleeve rod. The trouble that a user manually adjusts the gravity center or assists personnel in adjusting is reduced, the user only needs to operate the wheelchair to normally climb stairs or go downstairs, and the wheelchair can automatically complete reasonable distribution of the gravity center, so that the stair climbing process is more convenient and efficient, and the practicability of the wheelchair in the stair climbing scene is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stair climbing wheelchairs, and in particular to a multifunctional stair climbing wheelchair. Background Art

[0002] The existing multifunctional stair climbing wheelchair is mainly used to help people with limited mobility (such as the disabled and the elderly) to move in different terrain environments, especially stair environments. Its core function is to climb stairs. When encountering stairs, this wheelchair uses special mechanical devices to achieve climbing. Common stair climbing methods include tracked and wheeled types.

[0003] However, when it is in use, it does not have the function of automatically adjusting the center of gravity. During the climbing process, when the front of the wheelchair starts to go up the stairs, the center of gravity tends to lean backwards. There is no mechanism to adjust the center of gravity forward to balance the wheelchair. The wheelchair is likely to tip over backwards. For example, on a relatively steep staircase, if the center of gravity of the wheelchair cannot be moved forward in time, once the front track contacts the upper step and starts to climb, a backward flipping torque will be generated, causing the wheelchair to lose balance, thereby causing injury to the user. When going down the stairs, because the center of gravity cannot be automatically moved backwards, the front of the wheelchair may be too heavy, resulting in an increased risk of tipping forward. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a multifunctional stair climbing wheelchair. When climbing the stairs, the second motor will drive the frame to rotate so that the crawler track is tilted to adapt to the angle of the stairs. When the front end of the frame rotates upward, it will push the lower end of the front connecting rod upward, so that the lower end of the connecting rod will tilt forward, thereby pushing the sliding rod to move the connecting block forward to move the counterweight block, thereby moving the center of gravity of the device forward, which can effectively prevent the wheelchair from tipping backward due to the backward center of gravity when climbing the stairs. When going down the stairs, the rear end of the frame will tilt downward, thereby pushing the rear The lower end of the connecting rod causes the rear connecting rod to tilt backward, thereby driving the sliding rod backward, moving the counterweight block backward, and moving the center of gravity backward, which can prevent the wheelchair from tipping forward due to excessive weight at the front. Through the linkage, the wheelchair can automatically adjust the center of gravity when going up or down the stairs, which not only reduces the danger, but also reduces the trouble of the user manually adjusting the center of gravity or the help of assistants to adjust it. The user only needs to operate the wheelchair to perform normal climbing or going down the stairs, and the wheelchair can automatically complete the reasonable distribution of the center of gravity, which makes the stair climbing process more convenient and efficient, and improves the practicality of the wheelchair in stair climbing scenarios.

[0005] The present invention also provides the above-mentioned multifunctional stair-climbing wheelchair, comprising: a connecting seat, the inner surface of the connecting seat is fixedly connected with a buffer assembly, the upper end of the buffer assembly is fixedly connected with a bottom plate, the upper surface of the bottom plate is fixedly connected with a seat cushion, the upper surface of the bottom plate is fixedly connected with a pad, the front surface of the pad is fixedly connected with a cushion, the side surface of the connecting seat is fixedly connected with a support frame, the side surface of the support frame is rotatably connected with a rotating wheel, the lower surface of the connecting seat is fixedly connected with a limiting sleeve rod, the outer wall of the limiting sleeve rod is slidably connected with a sleeve, the lower surface of the sleeve is fixedly connected with the connecting frame, a lifting assembly is arranged between the connecting frame and the connecting seat, the inner surface of the connecting frame is rotatably connected with a frame, the side surface of the connecting frame is fixedly connected with motor 2, and the frame is driven by motor 2 The outer surface of the sliding panel also is connected with the sliding panel, and the sliding panel also is connected with the sliding panel to the outer surface of the sliding panel.

[0006] According to a multifunctional stair-climbing wheelchair provided by the present invention, the buffer assembly includes: a spring and a damper, the spring and the damper are fixedly connected to the inner surface of the connecting seat, the damper is located inside the spring, and the connecting seat is fixedly connected to the upper ends of the spring and the damper.

[0007] According to a multifunctional stair-climbing wheelchair provided by the present invention, a motor 1 is fixedly connected to the side surface of the frame, and the rotating roller is driven by the motor 1.

[0008] According to the multifunctional stair-climbing wheelchair provided by the present invention, the upper surface of the connecting seat is fixedly connected to a support rod, and the upper surface of the support rod is fixedly connected to a handrail.

[0009] According to the multifunctional stair-climbing wheelchair provided by the present invention, a handle is fixedly connected to the rear surface of the pad, and a sheath is fixedly connected to the outer surface of the handle.

[0010] According to a multifunctional stair-climbing wheelchair provided by the present invention, an air duct is fixedly connected to the inner surface of the connecting seat, and an air inlet is arranged on the air duct.

[0011] According to a multifunctional stair-climbing wheelchair provided by the present invention, the inner surface of the air duct is fixedly connected to a motor three, and the output end of the motor three is fixedly connected to a fan blade.

[0012] According to a multifunctional stair-climbing wheelchair provided by the present invention, a through hole is provided on the bottom plate, the through hole is located above the fan blade, a bracket is fixedly connected to the inner wall of the through hole, and the bracket is movably connected to the seat cushion.

[0013] According to a multifunctional stair-climbing wheelchair provided by the present invention, the lifting assembly includes: a hydraulic cylinder and a hydraulic rod, the hydraulic cylinder is fixedly connected to the lower surface of the connecting seat, the hydraulic rod is fixedly connected to the output end of the hydraulic cylinder, and the hydraulic rod is fixedly connected to the upper surface of the connecting frame.

[0014] Beneficial Effects

[0015] 1. Compared with the prior art, the multifunctional stair climbing wheelchair, when climbing the stairs, the motor 2 will drive the frame to rotate so that the crawler track is tilted to adapt to the angle of the stairs. When the front end of the frame rotates upward, it will push the lower end of the front connecting rod upward, so that the lower end of the connecting rod will tilt forward, thereby pushing the sliding rod with the connecting block to move the counterweight block forward, so that the center of gravity of the device moves forward, which can effectively prevent the wheelchair from tipping backwards due to the rearward center of gravity when climbing stairs. When going down the stairs, the rear end of the frame will tilt downward, thereby pushing the lower end of the rear connecting rod, so that the rear The connecting rod tilts backward, which will drive the sliding rod backward, moving the counterweight block and the center of gravity backward, which can prevent the wheelchair from tipping forward due to excessive weight at the front. Through the linkage, the wheelchair can automatically adjust the center of gravity when going up or down the stairs, which not only reduces the danger, but also reduces the trouble of the user manually adjusting the center of gravity or the help of assistants to adjust it. The user only needs to operate the wheelchair to perform normal climbing or going down the stairs, and the wheelchair can automatically complete the reasonable distribution of the center of gravity, which makes the climbing process more convenient and efficient, and improves the practicality of the wheelchair in the stair climbing scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is a front view structural diagram of the multifunctional stair climbing wheelchair of the present invention;

[0018] Figure 2 It is a right side cross-sectional structural diagram of the multifunctional stair climbing wheelchair of the present invention;

[0019] Figure 3 It is a front cross-sectional structural diagram of the multifunctional stair climbing wheelchair of the present invention;

[0020] Figure 4 The figure is a bottom-up structural diagram of the multifunctional stair-climbing wheelchair of the present invention.

[0021] Legend:

[0022] 1. Armrest; 2. Support rod; 3. Cushion; 4. Connecting seat; 5. Cover; 6. Handle; 7. Cushion; 8. Pad; 9. Bottom plate; 10. Support frame; 11. Rotating wheel; 12. Side plate; 13. Connecting rod; 14. Rotating shaft; 15. Connecting block; 16. Slide groove; 17. Frame; 18. Rotating roller; 19. Track; 20. Slide rod; 21. Slide rail; 22. Through groove; 23. Counterweight; 24. Bracket; 25. Through hole; 26. Air duct; 27. Limit sleeve; 28. Sleeve; 29. ​​Fan blade; 30. Motor three; 31. Spring; 32. Damper; 33. Hydraulic cylinder; 34. Hydraulic rod; 35. Motor two; 36. Motor one; 37. Connecting frame. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] Reference Figure 1-4 The embodiment of the present invention is a multifunctional stair climbing wheelchair, which includes: a connecting seat 4, which is an important connecting component of the entire wheelchair and plays a connecting role. The inner surface of the connecting seat 4 is fixedly connected with an air duct 26, and an air inlet is arranged on the air duct 26. The inner surface of the air duct 26 is fixedly connected with a motor 30, and the output end of the motor 30 is fixedly connected with a fan blade 29, which rotates under the drive of the motor 3 to suck air from the air inlet and blow it to the seat cushion 3 through the through holes on the air duct and the bottom plate, so as to provide the user with a ventilation function for the seat cushion 3 and increase the riding comfort. The bottom plate 9 is provided with a through hole 25, and the through hole 25 is located above the fan blade 29. The inner wall of the through hole 25 is fixedly connected with a support The bracket 24 is movably connected to the seat cushion 3, the upper surface of the connecting seat 4 is fixedly connected to the support rod 2, the upper surface of the support rod 2 is fixedly connected to the armrest 1, the inner surface of the connecting seat 4 is fixedly connected to the buffer assembly, the buffer assembly includes: a spring 31 and a damper 32, the spring 31 and the damper 32 are both fixedly connected to the inner surface of the connecting seat 4, the damper 32 is located inside the spring 31, the connecting seat 4 is fixedly connected to the upper ends of the spring 31 and the damper 32, when the wheelchair is subjected to vibration or impact force, the spring 31 will undergo elastic deformation, absorb and store energy, the damper 32 is mainly used to control the expansion and contraction speed of the spring 31, and it can prevent the spring 31 from excessively rebounding after being impacted.

[0025] The upper end of the buffer assembly is fixedly connected to a base plate 9, which serves as a supporting structure for the seat cushion and the pad, providing a stable sitting or lying surface for the user. The upper surface of the base plate 9 is fixedly connected to a seat cushion 3, for the user to sit directly on it, providing a comfortable riding experience. The upper surface of the base plate 9 is fixedly connected to a pad 8, which is used to support the user's body parts, such as the back, etc. The rear surface of the pad 8 is fixedly connected to a handle 6, and the outer surface of the handle 6 is fixedly connected to a cover 5. The front surface of the pad 8 is fixedly connected to a cushion 7, which mainly provides support for the user's waist and back, so that the user can maintain a comfortable sitting posture in the wheelchair. The side surface of the connecting seat 4 is fixedly connected to a support frame 10, which is used to connect and support the rotating wheel so that the rotating wheel can rotate stably. The side surface of the support frame 10 is rotatably connected to the rotating wheel 11, which realizes the movement function of the wheelchair through contact and rolling with the ground.

[0026] The lower surface of the connecting seat 4 is fixedly connected to a limiting sleeve rod 27, which guides and limits the sleeve, ensures that the sleeve can stably slide up and down on its outer wall, and limits the movement direction of the sleeve. The outer wall of the limiting sleeve rod 27 is slidably connected with a sleeve 28, which serves as a connecting component to connect the connecting frame with the limiting sleeve rod. The lower surface of the sleeve 28 is fixedly connected to a connecting frame 37 for connecting the frame 17. A lifting assembly is arranged between the connecting frame 37 and the connecting seat 4, and the lifting assembly includes: a hydraulic cylinder 33 and a hydraulic rod 34. The hydraulic cylinder 33 is fixedly connected to the lower surface of the connecting seat 4, and the hydraulic rod 34 is fixedly connected to the output end of the hydraulic cylinder 33. The hydraulic rod 34 is fixedly connected to the upper surface of the connecting frame 37, and is used to drive the track 19 to adjust its angle after rising. The inner surface of the connecting frame 37 is rotatably connected to the frame 17, which serves as the main part of the stair climbing mechanism. Rotating rollers 18 and tracks 19 are installed inside to provide support for the wheelchair to crawl on the stairs. The side surface of the frame 17 is fixedly connected to a motor 36, and the rotating roller 18 is driven by the motor 36. The side surface of the connecting frame 37 is fixedly connected to a motor 2 35, and the frame 17 is driven by the motor 2 35. The inner surface of the frame 17 is rotatably connected to the rotating roller 18, which rotates under the drive of the motor 1 36 to provide power support for the track 19.

[0027] The outer wall of the rotating roller 18 is rotatably connected to a crawler 19, which contacts the surface of the stairs and rolls on the stairs through the drive of the rotating roller 18, transmitting the power of the rotating roller 18 to the stairs to realize the climbing action of the wheelchair. A slide groove 16 is provided on the frame 17 to provide a sliding track for the counterweight block to limit the movement direction of the counterweight block. The inner surface of the slide groove 16 is slidably connected to the counterweight block 23, and the center of gravity of the wheelchair is adjusted by sliding on the frame. The upper surface of the frame 17 is fixedly connected to a slide rail 21 to provide a sliding track for the slide rod 20 to ensure that the slide rod 20 can slide smoothly on the frame. The inner surface of the slide rail 21 is slidably connected to the slide rod 20, and the tilting movement of the frame 17 is transmitted to the counterweight block 23 through the connection with the connecting rod 13, the connecting block 15 and other components. A through groove 22 is provided on the slide rail 21, and the side surface of the slide rod 20 is fixedly connected to the connecting block 15.

[0028] The connecting block 15 is slidably connected to the inside of the through groove 22, and the side surface of the connecting block 15 is fixedly connected to the side surface of the counterweight block 23. The side surface of the sleeve 28 is fixedly connected to four side plates 12, and the four side plates 12 are symmetrically arranged. The lower surfaces of the four side plates 12 are rotatably connected to the connecting rods 13, which are used to be connected to the lower surface of the side plates 12 at one end and connected to the rotating shaft 14 at the other end, so as to transmit the motion. The side surface of the sliding rod 20 is rotatably connected to the rotating shaft 14, which is used to rotate inside the through groove 22 and is connected to the other end of the sliding rod 20. It can convert the swinging motion of the connecting rod 20 into the linear sliding motion of the sliding rod 20. The rotating shaft 14 is rotatably connected to the inside of the through groove 22, and the other end of the connecting rod 13 is fixedly connected to the side surface of the rotating shaft 14.

[0029] Working principle: when in use, when climbing the stairs, the motor 2 35 will drive the frame 17 to rotate so that the crawler 19 is tilted to adapt to the angle of the stairs. When the front end of the frame 17 rotates upward, it will push the lower end of the front connecting rod 13 upward, so that the lower end of the connecting rod 13 will tilt forward, thereby pushing the sliding rod 20 with the connecting block 15 to move the counterweight block 23 forward, thereby moving the center of gravity of the equipment forward, which can effectively prevent the wheelchair from tipping over backward due to the rearward center of gravity when climbing the stairs. When going down the stairs, the rear end of the frame 17 will tilt downward, thereby pushing the lower end of the rear connecting rod 13, so that the rear connecting rod 13 tilts backward, thereby driving the sliding rod 20 backward, moving the counterweight block 23 backward, and moving the center of gravity backward, which can prevent the wheelchair from tipping over forward due to excessive weight at the front. Through linkage, the wheelchair can automatically adjust the center of gravity when going up or down the stairs, which not only reduces the danger, but also reduces the trouble of the user manually adjusting the center of gravity or the help of assistants to adjust, thereby improving the practicality of the wheelchair in the scene of climbing stairs.

[0030] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A multifunctional stair climbing wheelchair, characterized in that: include: A connecting seat (4), the inner surface of which is fixedly connected to a buffer assembly, the upper end of which is fixedly connected to a bottom plate (9), the upper surface of which is fixedly connected to a seat cushion (3), the upper surface of which is fixedly connected to a pad (8), the front surface of which is fixedly connected to a back cushion (7), the side surface of which is fixedly connected to a support frame (10), the side surface of which is rotatably connected to a rotating wheel (11), the connecting seat (4) The lower surface of the connection seat (4) is fixedly connected to a limit sleeve rod (27), the outer wall of the limit sleeve rod (27) is slidably connected to a sleeve (28), the lower surface of the sleeve (28) is fixedly connected to a connecting frame (37), a lifting assembly is provided between the connecting frame (37) and the connection seat (4), the inner surface of the connecting frame (37) is rotatably connected to a frame (17), the side surface of the connecting frame (37) is fixedly connected to a second motor (35), and the frame (17) is driven by the second motor (35); The inner surface of the frame (17) is rotatably connected to a rotating roller (18), and the outer wall of the rotating roller (18) is rotatably connected to a crawler (19). The frame (17) is provided with a slide groove (16), and the inner surface of the slide groove (16) is slidably connected to a counterweight block (23). The upper surface of the frame (17) is fixedly connected to a slide rail (21), and the inner surface of the slide rail (21) is slidably connected to a slide rod (20). The slide rail (21) is provided with a through groove (22). The side surface of the slide rod (20) is fixedly connected to a connecting block (15), and the connecting block (15) is fixedly connected to the connecting block (15). 5) is slidably connected inside the through groove (22), the side surface of the connecting block (15) is fixedly connected to the side surface of the counterweight block (23), the side surface of the sleeve (28) is fixedly connected to four side plates (12), the four side plates (12) are symmetrically arranged, the lower surfaces of the four side plates (12) are rotatably connected to the connecting rod (13), the side surface of the sliding rod (20) is rotatably connected to the rotating shaft (14), the rotating shaft (14) is rotatably connected inside the through groove (22), and the other end of the connecting rod (13) is fixedly connected to the side surface of the rotating shaft (14).

2. A multifunctional stair climbing wheelchair according to claim 1, characterized in that: The buffer assembly comprises: a spring (31) and a damper (32); the spring (31) and the damper (32) are both fixedly connected to the inner surface of a connecting seat (4); the damper (32) is located inside the spring (31); and the connecting seat (4) is fixedly connected to the upper ends of the spring (31) and the damper (32).

3. The multifunctional stair climbing wheelchair according to claim 1, characterized in that: A motor 1 (36) is fixedly connected to the side surface of the frame (17), and the rotating roller (18) is driven by the motor 1 (36).

4. The multifunctional stair climbing wheelchair according to claim 1, characterized in that: The upper surface of the connecting seat (4) is fixedly connected to a support rod (2), and the upper surface of the support rod (2) is fixedly connected to a handrail (1).

5. The multifunctional stair climbing wheelchair according to claim 1, characterized in that: The rear surface of the pad (8) is fixedly connected to a handle (6), and the outer surface of the handle (6) is fixedly connected to a protective sheath (5).

6. The multifunctional stair climbing wheelchair according to claim 1, characterized in that: An air duct (26) is fixedly connected to the inner surface of the connecting seat (4), and an air inlet is provided on the air duct (26).

7. The multifunctional stair climbing wheelchair according to claim 6, characterized in that: The inner surface of the air duct (26) is fixedly connected to a motor three (30), and the output end of the motor three (30) is fixedly connected to a fan blade (29).

8. The multifunctional stair climbing wheelchair according to claim 7, characterized in that: The bottom plate (9) is provided with a through hole (25), the through hole (25) is located above the fan blade (29), the inner wall of the through hole (25) is fixedly connected with a bracket (24), and the bracket (24) is movably connected to the seat cushion (3).

9. The multifunctional stair climbing wheelchair according to claim 1, characterized in that: The lifting assembly comprises: a hydraulic cylinder (33) and a hydraulic rod (34); the hydraulic cylinder (33) is fixedly connected to the lower surface of the connecting seat (4); the hydraulic rod (34) is fixedly connected to the output end of the hydraulic cylinder (33); and the hydraulic rod (34) is fixedly connected to the upper surface of the connecting frame (37).

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