Self-balancing electric wheelchair

Abstract

The utility model discloses a self-balancing electric wheelchair, and relates to the technical field of wheelchairs. Comprising a seat body and a walking mechanism installed on the bottom face of the seat body, a walking balance mechanism is installed between the seat body and the walking mechanism, and the walking balance mechanism comprises a buffering assembly, a gravity center height adjusting assembly and a distance adjusting mechanism. Two internal thread blocks on the sliding chute shell are far away from each other to drive one end, located at the sliding chute shell, of the limiting rod to push the sliding blocks to slide, namely, the two sliding blocks in the sliding chute shell are far away from each other to compress the buffer springs on the sliding rods at the positions, so that the elastic potential energy release stroke of the buffer springs is shortened, and the buffer strength of the buffer springs is reduced; the jolting strength of the jolting road section at one end prevents the elastic potential energy release stroke of the buffer spring from being too long, and the jolting feeling is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, specifically to a self-balancing electric wheelchair. Background Technology

[0002] For people who have difficulty walking or are unable to walk due to physical disability, old age, illness, or other reasons, wheelchairs are an important tool for them to achieve independent mobility. They can help users freely enter and exit their homes, communities, shopping malls, hospitals, and other places, meet their basic needs for daily travel and participation in social activities, and greatly improve their living range and mobility.

[0003] The authorized announcement number discloses an "automatic balanced stair-climbing wheelchair with electric walking on flat ground," comprising a chair frame, two sets of track frames mounted on the rear side of the chair frame; tracks mounted on the track frames; wheels mounted on the lower sides of the two track frames; and front wheels mounted on the front end of the chair frame. The stair-climbing wheelchair has a flat-ground walking posture and a stair-climbing posture. The rotation of the two wheels relative to the track frames enables the stair-climbing wheelchair to switch walking postures. When switching from a flat-ground walking posture to a stair-climbing posture, the track frames tilt backward, the tracks contact the flat ground, and the front wheels disengage from the flat ground; when switching from a stair-climbing posture back to a flat-ground walking posture, the track frames return to their original position, and the front wheels contact the flat ground. Therefore, only the rotation of the wheels relative to the track frames needs to be controlled to complete the adjustment and switching of walking postures. This eliminates the need for a front wheel swing component, optimizes the overall structure of the wheelchair, and reduces the difficulty of posture switching control.

[0004] The technology has the following problems: the track mechanism of the above-mentioned wheelchairs and some similar wheelchairs does not have shock absorption function. It is only suitable for some roads with good road conditions. When the road conditions are poor, if the user's center of gravity is too high or the driving speed is too fast, the wheelchair is prone to tipping over. In addition, it cannot reduce the vibration during the driving process, which will cause discomfort to the user's buttocks and waist due to prolonged bumps. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a self-balancing electric wheelchair, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-balancing electric wheelchair, comprising a seat and a walking mechanism mounted on the bottom of the seat, wherein a walking balancing mechanism is installed between the seat and the walking mechanism, and the walking balancing mechanism includes:

[0007] A buffer assembly includes two inverted concave blocks symmetrically fixedly mounted on a walking mechanism. A sliding groove shell is fixedly mounted on the center of the top surface of each of the two inverted concave blocks. A sliding rod is fixedly mounted on the center of the inner cavity of each sliding groove shell. Two sliders are symmetrically slidably mounted on the outer wall of each of the two sliding rods. A limit buffer block is fixedly mounted on the side wall of each slider. A buffer spring is sleeved on the outer wall between the sliding rod and the slider.

[0008] The buffer assembly also includes two internally threaded blocks disposed between two slide shells. Limiting rods are fixedly installed on both sides of the two internally threaded blocks. The other end of the limiting rod is slidably disposed in a slide groove opened on the side wall of the slide shell. Limiting blocks are fixedly installed on the top surface of the end of the limiting rod located in the slide groove, and a limiting buffer groove matching the limiting buffer block is opened at the end of the limiting rod located in the slide groove.

[0009] The center of gravity height adjustment component allows users to adjust the height of their center of gravity while seated.

[0010] The adjustable distance mechanism adjusts the buffering level of the buffer assembly.

[0011] Furthermore, the center of gravity height adjustment assembly includes a seat connecting seat fixedly installed on the bottom surface of the seat, a hinge seat symmetrically fixedly installed on the bottom surface of the seat connecting seat, a connecting rod hinged to both the front and rear ends of the two hinge seats, a hinge joint hinged to the other end of the connecting rod, and the center of gravity height adjustment assembly fixedly installed on the top surface of the slider on the same side.

[0012] Furthermore, the adjusting mechanism includes a motor and two mounting plates symmetrically fixed between two sliding housings. A bidirectional threaded rod is rotatably mounted between the two mounting plates. A gear ring is fixedly mounted on the outer wall of the rear end of the bidirectional threaded rod. A gear is mounted on the rotating end of the motor. The gear meshes with the gear ring. The two threads are installed in the middle of the gear ring.

[0013] Furthermore, the walking mechanism includes symmetrically parallel track hubs, each of which is equipped with a track, and a track drive box for driving the track is installed between the two track hubs.

[0014] Furthermore, the inverted concave block is fixedly installed on the top surface of the track hub.

[0015] Furthermore, the motor is fixedly mounted on the top surface of the track drive box.

[0016] Beneficial effects

[0017] This invention provides a self-balancing electric wheelchair. Compared with the prior art, it has the following advantages:

[0018] 1. The motor drives the gear to rotate, which in turn causes the gear ring to rotate, which in turn causes the bidirectional threaded rod to rotate. The two internal threaded blocks on the rod move away from each other, causing the limit rod at one end of the slide box to push the slider to slide. That is, the two sliders in the slide box move away from each other, which in turn compresses the buffer spring on the slide rod at that position, shortening the elastic potential energy release stroke of the buffer spring, that is, reducing the buffer strength of the buffer spring. This reduces the bump intensity of the bumpy road section at this end, and avoids the elastic potential energy release stroke of the buffer spring being too long, which would increase the bumpiness.

[0019] 2. When the two sliders in the sliding housing move away from each other, the angle between the two connecting rods increases, causing the hinge seat to descend horizontally. This lowers the height of the hinge seat, thus reducing the height of the seat and lowering the user's center of gravity. This prevents the wheelchair from tipping over due to the user's excessive center of gravity when the walking mechanism travels quickly on bumpy roads. It also compensates for the reduced cushioning strength of the buffer spring. The two complement each other to achieve the purpose of adapting to driving on bumpy roads. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the walking balance mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the walking mechanism of this utility model;

[0023] Figure 4 This is a top view of the walking balance mechanism of this utility model;

[0024] Figure 5 This is a schematic diagram of the walking balance mechanism of this utility model.

[0025] In the picture:

[0026] 1. Seats;

[0027] 2. Walking mechanism; 201. Track hub; 202. Track; 203. Track drive box;

[0028] 3. Walking and balancing mechanism;

[0029] 4. Center of gravity height adjustment assembly; 401. Seat connecting base; 402. Hinge base; 403. Linkage rod; 404. Hinge joint;

[0030] 5. Buffer assembly; 301. Inverted concave block; 302. Slide groove shell; 303. Slide rod; 304. Buffer spring; 305. Internal thread block; 306. Limiting rod; 307. Slider; 308. Limiting block; 309. Limiting buffer groove; 310. Limiting buffer block;

[0031] 6. Adjustment mechanism; 601. Mounting plate; 602. Bidirectional threaded rod; 603. Motor; 604. Gear; 605. Gear ring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1 - Figure 5 This utility model provides a technical solution:

[0034] Example 1:

[0035] A self-balancing electric wheelchair includes a seat 1 and a walking mechanism 2 mounted on the bottom surface of the seat 1. A walking balancing mechanism 3 is installed between the seat 1 and the walking mechanism 2. The walking balancing mechanism 3 includes:

[0036] The buffer assembly 5 includes inverted concave blocks 301 symmetrically fixedly installed on the walking mechanism 2. A sliding groove shell 302 is fixedly installed in the middle of the top surface of each of the two inverted concave blocks 301. A sliding rod 303 is fixedly installed in the middle of the inner cavity of each sliding groove shell 302. Two sliders 307 are symmetrically slidably installed on the outer wall surface of each of the two sliding rods 303. A limit buffer block 310 is fixedly installed on the side wall surface of the slider 307. A buffer spring 304 is sleeved on the outer wall surface between the sliding rod 303 and the slider 307.

[0037] The buffer assembly 5 also includes two internally threaded blocks 305 disposed between the two sliding shells 302. Limiting rods 306 are fixedly installed on both sides of the two internally threaded blocks 305. The other end of the limiting rods 306 is slidably disposed in a sliding groove opened on the side wall of the sliding shell 302. Limiting blocks 308 are fixedly installed on the top surface of the end of the limiting rods 306 located in the sliding groove. A limiting buffer groove 309 matching the limiting buffer block 310 is opened at the end of the limiting rods 306 located in the sliding groove.

[0038] The center of gravity height adjustment component 4 adjusts the height of the user's center of gravity when sitting on the seat 1;

[0039] The adjusting mechanism 6 adjusts the buffering level of the buffer assembly 5;

[0040] When the two sliders 307 in the slide housing 302 move away from each other, the height of the center of gravity height adjustment component 4 decreases, that is, the height of the seat 1 decreases, thereby reducing the user's center of gravity height. This prevents the wheelchair from tipping over due to the user's excessive center of gravity height when the walking mechanism 2 is traveling quickly on bumpy roads. It also compensates for the reduced cushioning strength of the buffer spring 304, thus achieving the purpose of adapting to driving on bumpy roads.

[0041] In this embodiment, the center of gravity height adjustment component 4 includes a seat connecting seat 401 fixedly installed on the bottom surface of the seat 1. A hinge seat 402 is symmetrically fixedly installed on the bottom surface of the seat connecting seat 401. A connecting rod 403 is hingedly installed at both the front and rear ends of the two hinge seats 402. A hinge joint 404 is hinged at the other end of the connecting rod 403. The center of gravity height adjustment component 40 is fixedly installed on the top surface of the slider 307 on the same side.

[0042] When the two sliders 307 in the slide housing 302 move away from each other, the included angle between the two connecting rods 403 increases, and the hinge seat 402 descends horizontally, causing the height of the hinge seat 402 to decrease, that is, the height of the seat 1 is reduced, thereby lowering the user's center of gravity.

[0043] In this embodiment, the adjusting mechanism 6 includes a motor 603 symmetrically fixedly installed between two mounting plates 601 between two sliding shells 302. A bidirectional threaded rod 602 is rotatably installed between the two mounting plates 601. A gear ring 605 is fixedly installed on the outer wall of the rear end of the bidirectional threaded rod 602. A gear 604 is installed on the rotating end of the motor 603. The gear 604 meshes with the gear ring 605. Two threads are installed in the middle of the gear ring 605.

[0044] Above, the motor 603 drives the gear 604 to rotate, which in turn causes the gear ring 605 to rotate, which in turn causes the bidirectional threaded rod 602 to rotate. The two internal threaded blocks 305 on it move away from each other, causing the limiting rod 306 located at one end of the slide shell 302 to push the slider 307 to slide.

[0045] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0046] In use, the motor 603 drives the gear 604 to rotate, which in turn causes the gear ring 605 to rotate, which in turn causes the bidirectional threaded rod 602 to rotate. The two internal threaded blocks 305 on the rod move away from each other, causing the limiting rod 306 at one end of the slide box 302 to push the slider 307 to slide. That is, the two sliders 307 in the slide box 302 move away from each other [due to the limiting of the internal threaded blocks 305 by the bidirectional threaded rod 602 and the limiting buffer block 310 on the slider 307 by the limiting buffer groove 309, the slider 307 will not be reset by the buffer spring 304]. This compresses the buffer spring 304 on the slide rod 303 at the location, shortening the elastic potential energy release stroke of the buffer spring 304, that is, reducing the buffering strength of the buffer spring 304. This reduces the bump intensity of the bumpy road section at this end and avoids the elastic potential energy release stroke of the buffer spring 304 being too long, which would increase the bumpiness.

[0047] When the two sliders 307 in the slide housing 302 move away from each other, the included angle between the two connecting rods 403 increases, which causes the hinge seat 402 to drop horizontally, thus lowering the height of the hinge seat 402 and lowering the height of the seat 1. This lowers the user's center of gravity, thereby preventing the wheelchair from tipping over due to the user's excessive center of gravity when the walking mechanism 2 travels quickly on bumpy roads. It also compensates for the reduced cushioning strength of the buffer spring 304. The two complement each other to achieve the purpose of adapting to travel on bumpy roads.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-balancing electric wheelchair comprising a seat (1) and a walking mechanism (2) mounted on the bottom surface of the seat (1), characterized in that: A walking balance mechanism (3) is installed between the seat (1) and the walking mechanism (2), and the walking balance mechanism (3) includes: A buffer assembly (5) includes two inverted concave blocks (301) symmetrically fixedly installed on the walking mechanism (2). A sliding groove shell (302) is fixedly installed in the middle of the top surface of each of the two inverted concave blocks (301). A sliding rod (303) is fixedly installed in the middle of the inner cavity of each sliding groove shell (302). Two sliders (307) are symmetrically slidably installed on the outer wall of each of the two sliding rods (303). A limit buffer block (310) is fixedly installed on the side wall of each slider (307). A buffer spring (304) is sleeved on the outer wall between the sliding rod (303) and the slider (307). The buffer assembly (5) further includes two internally threaded blocks (305) disposed between two sliding shells (302). Limiting rods (306) are fixedly installed on both sides of the two internally threaded blocks (305). The other end of the limiting rod (306) is slidably disposed in a sliding groove opened on the side wall of the sliding shell (302). A limiting block (308) is fixedly installed on the top surface of the end of the limiting rod (306) located in the sliding groove. A limiting buffer groove (309) matching the limiting buffer block (310) is opened at the end of the limiting rod (306) located in the sliding groove. Center of gravity height adjustment component (4) adjusts the center of gravity height of the user when sitting in the seat (1); The distance adjustment mechanism (6) adjusts the buffering degree of the buffer assembly (5).

2. The self-balancing electric wheelchair according to claim 1, characterized in that: The center of gravity height adjustment component (4) includes a seat connecting seat (401) fixedly installed on the bottom surface of the seat (1). A hinge seat (402) is fixedly installed symmetrically on the bottom surface of the seat connecting seat (401). A connecting rod (403) is hinged to both the front and rear ends of the two hinge seats (402). A hinge joint (404) is hinged to the other end of the connecting rod (403). The center of gravity height adjustment component (4) is fixedly installed on the top surface of the slider (307) on the same side.

3. The self-balancing electric wheelchair according to claim 1, characterized in that: The adjusting mechanism (6) includes a motor (603) and two mounting plates (601) fixedly installed symmetrically between two sliding shells (302). A bidirectional threaded rod (602) is rotatably installed between the two mounting plates (601). A gear ring (605) is fixedly installed on the outer wall of the rear end of the bidirectional threaded rod (602). A gear (604) is installed on the rotating end of the motor (603). The gear (604) meshes with the gear ring (605). The two threads are installed in the middle of the gear ring (605).

4. A self-balancing electric wheelchair according to claim 1, characterized in that: The walking mechanism (2) includes symmetrically parallel track hubs (201), each of which is equipped with a track (202), and a track drive box (203) for driving the track (202) is installed between the two track hubs (201).

5. A self-balancing electric wheelchair according to claim 4, characterized in that: The inverted concave block (301) is fixedly installed on the top surface of the track hub (201).

6. The self-balancing electric wheelchair according to claim 3, wherein: The motor (603) is fixedly installed on the top surface of the track drive box (203).

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