Wheelchair with electric climbing function

Abstract

The utility model discloses a wheelchair with electric climb function belongs to medical instrument technical field. Including frame, adjusting mechanism and wheel track mechanism, the top fixed mounting of frame has stool face, adjusting mechanism sets up frame in, and adjusting mechanism is located below stool face, wheel track mechanism slidingly sets up in adjusting mechanism, the frame includes two vertical rods and two cross bars, and the fixed mounting of two vertical rods between has crossbeam no.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a wheelchair with an electric climbing function. Background Technology

[0002] Wheelchairs are primarily used by the elderly and people with lower limb disabilities. Currently, there are many types of ordinary wheelchairs on the market, but they can only be used indoors or on flat surfaces without accessibility, limiting the range of movement for the elderly and disabled.

[0003] To address this issue, research institutions both domestically and internationally have developed various wheelchairs with ladder-climbing capabilities, but these cannot meet the climbing requirements of different step sizes, thus limiting their application. Utility Model Content

[0004] The technical problem to be solved by this utility model is that, in order to solve the problem that wheelchairs with climbing functions cannot adapt to different step sizes, this utility model provides a wheelchair with electric climbing function, which is not only suitable for environments with different step sizes, but also can smoothly transition between flat ground and stairs with strong stability.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a wheelchair with electric climbing function, including a frame, an adjustment mechanism and a wheel track mechanism; a seat is fixedly installed on the top of the frame, the adjustment mechanism is set inside the frame and located below the seat, and the wheel track mechanism is slidably set inside the adjustment mechanism;

[0006] The frame includes two uprights and two crossbars, with each upright and crossbar fixedly connected to the other. The crossbars are located on one side of the uprights, and their axes are perpendicular to the axes of the uprights. The bottom of the bench is fixedly connected to the crossbars. A crossbeam is fixedly installed between the two uprights, and a support arm is fixedly installed on the crossbeam. The adjustment mechanism is located below the crossbeam.

[0007] The adjustment mechanism includes two mounting frames and an arch frame one located between the mounting frames. The two mounting frames are arranged in parallel vertically and are positioned opposite each other. The arch frame one is fixedly installed between the mounting frames. The arch frame one is located on the side of the upright away from the horizontal bar. The end of the support arm away from the horizontal beam one is connected to the arch frame one. A sliding groove is provided on the inner side of the mounting frame.

[0008] The wheel track mechanism includes an X-shaped base frame and a folding frame. The base frame is disposed between two mounting frames. A sliding key is fixedly installed on the side of the base frame, and the end of the sliding key away from the frame engages with an adjacent slide groove. The bottom of the folding frame is fixedly installed in the center of the base frame, and the movable end of the folding frame can be engaged with a crossbeam.

[0009] Therefore, when climbing stairs or on steep slopes, medical staff can pull the wheel-track mechanism backward, rotate it clockwise to the appropriate position, unfold the folding frame, and attach the end of the folding frame away from the base frame to a crossbeam; then tilt the wheelchair backward to make the wheel-track mechanism contact the ground, and pull the wheelchair up to achieve the climbing action; the wheel-track mechanism has excellent obstacle crossing ability and maneuverability. On flat terrain, it can use the wheel structure to move forward, and on uneven terrain, it can use the tracks to move forward, thus meeting the needs of climbing steps of different sizes.

[0010] Furthermore, the long side of the groove is parallel to the long side of the mounting bracket, and the sliding key is cylindrical.

[0011] Furthermore, the base frame is equipped with a drive wheel, a driven wheel, and an auxiliary wheel on both sides via bearings. The drive wheel, auxiliary wheel, and driven wheel are distributed in an obtuse triangle. The drive wheel is located between the auxiliary wheel and the driven wheel. A track is provided between the auxiliary wheel and the driven wheel, and the track meshes with the drive wheel, auxiliary wheel, and driven wheel. A section of the track body between the auxiliary wheel and the drive wheel forms an inclined section. The purpose of this section is that when the wheelchair transitions from the bottom plane of the stairs to the stairs, the inclined section can contact the steps of the stairs first, guiding the track to climb upwards, thereby ensuring a smooth and reliable transition.

[0012] Furthermore, a drive mechanism is provided at the bottom of the base frame away from the folding frame. The output end of the drive mechanism is connected to the drive wheel through a transmission assembly. The drive mechanism adopts a wheel drive mechanism or an additional power source for driving, thereby realizing the rotation of the track. The transmission assembly adopts a shaft and coupling structure or a toothed chain structure, thereby realizing rotational transmission.

[0013] Furthermore, the folding frame includes a base frame, an intermediate frame, and a connecting frame; the bottom of the base frame is fixedly connected to the base frame, one end of the intermediate frame is hinged to one end of the base frame, and the other end of the intermediate frame is hinged to one end of the connecting frame; damping elements are provided at the hinge points of the base frame and the intermediate frame, the intermediate frame, and the connecting frame; a snap-fit ​​is provided at the other end of the connecting frame, and the snap-fit ​​is snap-fitted to the crossbeam; thus, when the wheel track mechanism is obliquely placed on one side of the upright, the folding frame is fixed to the base frame by connecting to the crossbeam.

[0014] Furthermore, a pull rod is provided on the inner side of one end of the base frame to facilitate medical staff to pull the wheel track mechanism.

[0015] Furthermore, a second crossbeam is fixedly installed between the two crossbeams, and the second crossbeam is located below the bench surface; an arch frame is fixedly installed between the two mounting frames, and the second arch frame is arranged parallel to one side of the arch frame; a telescopic rod is provided between the second arch frame and the second crossbeam, one end of the telescopic rod is hinged to the second crossbeam, and the other end of the telescopic rod is hinged to the second arch frame; the telescopic rod is electrically or pneumatically controlled; the top of the second arch frame is hinged to the support arm; thus, when going downstairs or downhill, the electric or pneumatic control causes the telescopic rod to extend, and the telescopic rod pushes the mounting frame to rotate clockwise around the support arm connection point, so that the wheel track mechanism is inclined downward to contact the ground. At this time, the bench surface and the crossbeam are still on the horizontal plane. This structure saves medical staff the pulling force when pushing down and has a higher safety factor.

[0016] Furthermore, limiting holes are provided on the sides of both the mounting frame and the base frame; thus, when the wheel track mechanism is placed horizontally below the seat, it is positioned by a pin passing through the limiting holes on the mounting frame and the base frame.

[0017] Furthermore, the bottom of the frame is provided with a rear wheel assembly and a front wheel assembly, with the rear wheel assembly fixedly installed at the bottom of the upright; the rear wheel assembly, the front wheel assembly, and the wheel track mechanism do not interfere with each other.

[0018] Furthermore, a backrest mechanism is snapped onto the top of the frame, the backrest mechanism is located on one side of the stool surface, and the side of the backrest mechanism is snapped onto the stool surface.

[0019] The backrest mechanism includes an outer cylindrical rod and a backrest panel. The outer cylindrical rod is snapped into the upright rod in a one-to-one correspondence. The backrest panel is located between two outer cylindrical rods, and one end of the backrest panel is rotatably connected to the adjacent outer cylindrical rod. A support frame is hinged to the outer side of the outer cylindrical rod, and the side of the support frame can be snapped into the backrest rod. Thus, the backrest mechanism can be disassembled to form a walking aid, which facilitates rehabilitation training for patients.

[0020] The beneficial effect of this utility model is that the wheelchair with electric climbing function of this utility model, by setting up a wheel track mechanism, utilizes the excellent obstacle crossing ability and mobility of the wheel track mechanism to meet the needs of climbing steps of different sizes.

[0021] This utility model of a wheelchair with electric climbing function is equipped with an adjustment mechanism. When going downstairs or downhill, the wheel track mechanism is tilted downwards to contact the ground, while the seat and crossbeam remain on a horizontal plane. This structure saves medical staff the pulling force when pushing down and has a higher safety factor.

[0022] The wheelchair with electric climbing function of this utility model uses an obtuse triangle formed by the auxiliary wheel, the driving wheel and the driven wheel, so that a section of the track body between the auxiliary wheel and the driving wheel forms an inclined section, so that the wheelchair can smoothly and reliably transition to the stairs on the bottom plane of the stairs. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the preferred embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the wheel track mechanism climbing the ladder.

[0026] Figure 3 yes Figure 1 A schematic diagram of the adjustment mechanism.

[0027] Figure 4 It is an assembly drawing of the adjustment mechanism and the wheel track mechanism.

[0028] Figure 5 yes Figure 2 A schematic diagram of the folding frame structure.

[0029] Figure 6 This is a schematic diagram of the adjustment mechanism when it is in a downhill state.

[0030] In the diagram: 1. Frame; 11. Upright pole; 12. Horizontal bar; 13. Horizontal beam one; 131. Support arm; 14. Horizontal beam two; 2. Stool surface; 3. Backrest mechanism; 4. Wheel track mechanism; 41. Base frame; 42. Drive wheel; 43. Driven wheel; 44. Track; 45. Pull rod; 46. Folding frame; 461. Base frame; 462. Intermediate frame; 463. Connecting frame; 5. Adjustment mechanism; 51. Mounting frame; 511. Slide groove; 52. Arch frame one; 53. Arch frame two; 54. Telescopic rod. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0032] like Figures 1-6 The figure shown is the preferred embodiment of the present invention. A wheelchair with electric climbing function includes a frame 1, an adjustment mechanism 5 and a wheel track mechanism 4. A seat 2 is fixedly installed on the top of the frame 1. The adjustment mechanism 5 is set inside the frame 1 and is located below the seat 2. The wheel track mechanism 4 is slidably set on the adjustment mechanism 5.

[0033] Reference Figure 1 , Figure 2The frame 1 includes two uprights 11 and two crossbars 12, with each upright 11 and crossbar 12 fixedly connected to the other. The crossbars 12 are positioned on one side of the uprights 11, and their axes are perpendicular to the axes of the uprights 11. The bottom of the seat 2 is fixedly connected to the crossbars 12. A crossbeam 13 is fixedly installed between the two uprights 11, and a support arm 131 is fixedly installed on the crossbeam 13. An adjustment mechanism 5 is located below the crossbeam 13. A rear wheel assembly and a front wheel assembly are located at the bottom of the frame 1. The rear wheel assembly is fixedly installed at the bottom of the uprights 11. The front wheel assembly and wheel track mechanism 4 do not interfere with each other; the top of the frame 1 is snapped with a backrest mechanism 3, which is located on one side of the seat surface 2, and the side of the backrest mechanism 3 is snapped with the seat surface 2; the backrest mechanism 3 includes an outer cylinder rod and a backrest plate, the outer cylinder rod and the upright rod 11 are snapped with each other, the backrest plate is located between two outer cylinder rods, and one end of the backrest plate is rotatably connected to the adjacent outer cylinder rod; a support frame is hinged to the outside of the outer cylinder rod, and the side of the support frame can be snapped with the backrest rod; the backrest mechanism 3 can be disassembled to form a walking aid, which is convenient for patients to carry out rehabilitation training.

[0034] Reference Figures 2-4 The adjustment mechanism 5 includes two mounting frames 51 and an arch frame 52 located between the mounting frames 51. The two mounting frames 51 are arranged in parallel and vertically, and are arranged opposite to each other. The arch frame 52 is fixedly installed between the mounting frames 51. The arch frame 52 is located on the side of the upright 11 away from the horizontal bar 12. The end of the support arm 131 away from the horizontal beam 13 is connected to the arch frame 52. A sliding groove 511 is provided on the inner side of the mounting frame 51.

[0035] The wheel track mechanism 4 includes an X-shaped base frame 41 and a folding frame 46. The base frame 41 is located between two mounting frames 51. A sliding key is fixedly installed on the side of the base frame 41. The end of the sliding key away from the frame 1 is engaged with the adjacent slide groove 511. The bottom of the folding frame 46 is fixedly installed in the center of the base frame 41. The movable end of the folding frame 46 can be engaged with the crossbeam 13. The long side of the slide groove 511 is parallel to the long side of the mounting frame 51. The sliding key is cylindrical.

[0036] Therefore, when climbing stairs or on steep slopes, medical staff can pull out the wheel-track mechanism 4 backward, rotate it clockwise to a suitable position, unfold the folding frame 46, and attach the end of the folding frame 46 away from the base frame 41 to the crossbeam 13; then tilt the wheelchair backward so that the wheel-track mechanism 4 contacts the ground, and pull the wheelchair up to achieve the climbing behavior; the wheel-track mechanism 4 has excellent obstacle crossing ability and maneuverability. On flat terrain, it can use the wheel structure to move forward, and on uneven terrain, it can use the tracks 44 to move forward, thereby meeting the needs of climbing steps of different sizes.

[0037] in:

[0038] Reference Figure 4The base frame 41 has a drive wheel 42, a driven wheel 43, and an auxiliary wheel mounted on both sides via bearings. The drive wheel 42, the auxiliary wheel, and the driven wheel 43 are arranged in an obtuse triangle. The drive wheel 42 is located between the auxiliary wheel and the driven wheel 43. A track 44 is provided between the auxiliary wheel and the driven wheel 43. The track 44 meshes with the drive wheel 42, the auxiliary wheel, and the driven wheel 43. A section of the track 44 between the auxiliary wheel and the drive wheel 42 forms an inclined section. The purpose of this section is that when the wheelchair transitions from the bottom plane of the stairs to the stairs, the inclined section can contact the steps of the stairs first, guiding the track 44 to climb upwards, thereby ensuring a smooth and reliable transition.

[0039] In addition, a drive mechanism is provided at the bottom of the base frame 41 away from the folding frame 46. The output end of the drive mechanism is connected to the drive wheel 42 through a transmission assembly. The drive mechanism adopts a wheel drive mechanism or an additional power source for driving, thereby realizing the rotation of the track 44. The transmission assembly adopts a shaft and coupling structure or a toothed chain structure, thereby realizing rotational transmission.

[0040] Reference Figure 2 , Figure 4 , Figure 5 The folding frame 46 includes a base frame 461, an intermediate frame 462, and a connecting frame 463. The bottom of the base frame 461 is fixedly connected to the base frame 41. One end of the intermediate frame 462 is hinged to one end of the base frame 461, and the other end of the intermediate frame 462 is hinged to one end of the connecting frame 463. Damping elements are provided at the hinge points of the base frame 461, the intermediate frame 462, and the connecting frame 463. A snap-fit ​​component is provided at the other end of the connecting frame 463, and the snap-fit ​​component snaps into the crossbeam 13. Thus, when the wheel track mechanism 4 is placed obliquely on one side of the upright 11, the folding frame 46 fixes the base frame 41 by connecting to the crossbeam 13. A pull rod 45 is provided on the inner side of one end of the base frame 41 to facilitate the medical staff to pull the wheel track mechanism 4.

[0041] Reference Figures 1-3 , Figure 6A second crossbeam 14 is fixedly installed between two crossbeams, located below the bench surface 2; an arch frame 53 is fixedly installed between two mounting brackets 51, with the arch frame 53 positioned parallel to one side of the arch frame; a telescopic rod 54 is installed between the arch frame 53 and the second crossbeam 14, with one end of the telescopic rod 54 hinged to the second crossbeam 14 and the other end hinged to the arch frame 53; the telescopic rod 54 is electrically or pneumatically controlled; the top of the arch frame 53 is hinged to the support arm 131; thus, one can descend stairs or slopes. When the telescopic rod 54 is extended by electric or pneumatic control, the telescopic rod 54 pushes the mounting frame 51 to rotate clockwise around the connection of the support arm 131, so that the wheel track mechanism 4 is tilted downward to contact the ground. At this time, the bench surface 2 and the crossbeam are still on the horizontal plane. This structure saves the pulling force when medical staff push down and has a higher safety factor. Limiting holes are opened on the sides of the mounting frame 51 and the base frame 41. Thus, when the wheel track mechanism 4 is placed horizontally below the bench surface 2, it is positioned by the pin passing through the limiting holes on the mounting frame 51 and the base frame 41.

[0042] Working principle:

[0043] When climbing stairs or on steep slopes, medical staff will remove the latch and pull the wheel mechanism 4 backward using the lever 45, then rotate it clockwise upward to the appropriate position; unfold the folding frame 46 and attach the end of the folding frame 46 away from the base frame 41 to the crossbeam 13; then tilt the wheelchair backward so that the wheel mechanism 4 contacts the stair surface; medical staff will pull the wheelchair upward by the handle and simultaneously activate the drive mechanism to move the tracks on the stairs, reducing the workload of medical staff; after reaching the floor, the wheel mechanism will be reset and stored, and secured with the latch; at this time, the backrest can be quickly disassembled to form a walking aid for rehabilitation.

[0044] When going downstairs or downhill, the telescopic rod 54 extends and pushes the mounting frame 51 to rotate clockwise around the connection of the support arm 131, so that the wheel track mechanism 4 is tilted downwards and contacts the ground. At this time, the bench surface 2 and the crossbeam are still on the horizontal plane. This structure saves medical staff the pulling force when pushing down and has a higher safety factor.

[0045] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A wheelchair with an electric climbing function, comprising a frame (1), an adjustment mechanism (5), and a wheel track mechanism (4); a seat (2) is fixedly installed on the top of the frame (1), the adjustment mechanism (5) is disposed within the frame (1) and located below the seat (2), and the wheel track mechanism (4) is slidably disposed within the adjustment mechanism (5); characterized in that: The frame (1) includes two uprights (11) and two crossbars (12). The uprights (11) and crossbars (12) are fixedly connected in a one-to-one correspondence. The crossbars (12) are set on one side of the uprights (11), and the axis of the crossbars (12) is perpendicular to the axis of the uprights (11). The bottom of the bench surface (2) is fixedly connected to the crossbars (12). A crossbeam (13) is fixedly installed between the two uprights (11). A support arm (131) is fixedly installed on the crossbeam (13). The adjustment mechanism (5) is set below the crossbeam (13). The adjustment mechanism (5) includes two mounting frames (51) and an arch frame (52) located between the mounting frames (51). The two mounting frames (51) are arranged in parallel vertically and are arranged opposite to each other. The two ends of the arch frame (52) are fixedly connected to the adjacent mounting frames (51). The arch frame (52) is located on the side of the upright (11) away from the horizontal bar (12). The end of the support arm (131) away from the horizontal beam (13) is connected to the arch frame (52). A sliding groove (511) is provided on the inner side of the mounting frame (51). The wheel track mechanism (4) includes an X-shaped base frame (41) and a folding frame (46). The base frame (41) is located between two mounting frames (51). A sliding key is fixedly installed on the side of the base frame (41). The end of the sliding key away from the frame (1) cooperates with the slide groove (511). The bottom of the folding frame (46) is fixedly installed in the center of the base frame (41). The movable end of the folding frame (46) can be engaged with the crossbeam (13).

2. The wheelchair with electric climbing function as described in claim 1, characterized in that: The long side of the slide groove (511) is parallel to the long side of the mounting bracket (51), and the sliding key is cylindrical.

3. The wheelchair with electric climbing function as described in claim 1, characterized in that: The base frame (41) has a drive wheel (42), a driven wheel (43) and an auxiliary wheel mounted on both sides via bearings. The drive wheel (42), the auxiliary wheel and the driven wheel (43) are arranged in an obtuse triangle. The drive wheel (42) is located between the auxiliary wheel and the driven wheel (43). A track (44) is provided between the auxiliary wheel and the driven wheel (43). The track (44) meshes with the drive wheel (42), the auxiliary wheel and the driven wheel (43).

4. The wheelchair with electric climbing function as described in claim 3, characterized in that: A drive mechanism is provided at the bottom of the base frame (41) away from the folding frame (46), and the output end of the drive mechanism is connected to the drive wheel (42) through a transmission assembly.

5. The wheelchair with electric climbing function as described in claim 1, characterized in that: The folding frame (46) includes a base frame (461), an intermediate frame (462), and a connecting frame (463); the bottom of the base frame (461) is fixedly connected to the base frame (41), one end of the intermediate frame (462) is hinged to one end of the base frame (461), and the other end of the intermediate frame (462) is hinged to one end of the connecting frame (463). Damping elements are provided at the hinge points of the base frame (461) and the intermediate frame (462), the intermediate frame (462), and the connecting frame (463); a snap-fit ​​is provided at the other end of the connecting frame (463), and the snap-fit ​​can snap-fit ​​with the crossbeam (13).

6. The wheelchair with electric climbing function as described in claim 5, characterized in that: A pull rod (45) is provided on the inner side of one end of the base frame (41).

7. The wheelchair with electric climbing function as described in claim 6, characterized in that: A second crossbeam (14) is fixedly installed between the two crossbeams, and the second crossbeam (14) is located below the bench surface (2); an arch frame (53) is fixedly installed between the two mounting brackets (51), and the second arch frame (53) is arranged parallel to one side of the arch frame; a telescopic rod (54) is provided between the second arch frame (53) and the second crossbeam (14), one end of the telescopic rod (54) is hinged to the second crossbeam (14), and the other end of the telescopic rod (54) is hinged to the second arch frame (53).

8. The wheelchair with electric climbing function as described in claim 7, characterized in that: Limiting holes are provided on the sides of both the mounting bracket (51) and the base frame (41).

9. The wheelchair with electric climbing function as described in claim 1, characterized in that: The bottom of the frame (1) is provided with a rear wheel assembly and a front wheel assembly, and the rear wheel assembly is fixedly installed at the bottom of the upright (11); the rear wheel assembly, the front wheel assembly and the wheel track mechanism (4) do not interfere with each other.

10. The wheelchair with electric climbing function as described in claim 1, characterized in that: The top of the frame (1) is fitted with a backrest mechanism (3), which is located on one side of the seat surface (2) and the side of the backrest mechanism (3) is fitted with the seat surface (2). The backrest mechanism (3) includes an outer cylinder rod and a backrest plate. The outer cylinder rod and the upright rod (11) are connected in a one-to-one manner. The backrest plate is set between two outer cylinder rods, and one end of the backrest plate is rotatably connected to the adjacent outer cylinder rod. A support frame is hinged to the outer side of the outer cylinder rod, and the side of the support frame can be connected to the backrest rod.

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