Climbing-over-steps caterpillar mechanism of electric wheelchair

Abstract

The utility model relates to electric wheelchair technical field, and disclose a kind of electric wheelchair's ladder climbing obstacle belt mechanism, including electric wheelchair main body;Belt ladder climbing subassembly includes a pair of electric belt, a pair of electric belt between fixed mounting a pair of control box, a pair of control box is symmetrically fixed mounting in a pair of electric belt inner side wall both ends, first fixed link is rotatably installed in installation base plate bottom, first rotating sleeve seat bottom fixed mounting has several electric telescopic link, a pair of electric belt inner side wall between fixed mounting has second fixed link, the movable end of several electric telescopic link is fixed mounting in second rotating sleeve seat top surface.The electric wheelchair's ladder climbing obstacle belt mechanism, by setting belt ladder climbing subassembly, in the process of climbing, user can control threaded rod slowly forward rotation, so that the position of electric wheelchair main body gradually restores level, avoid the inclination of electric wheelchair main body too big influence user, guarantee the security of use.

Description

Technical Field

[0001] This utility model relates to the field of electric wheelchair technology, and in particular to a ladder-climbing and obstacle-crossing track mechanism for an electric wheelchair. Background Technology

[0002] As an important assistive mobility tool, electric wheelchairs are playing an increasingly important role in improving the quality of life for people with mobility impairments. However, traditional electric wheelchairs often have difficulty navigating obstacles such as stairs, steps, and ramps independently, requiring assistance from others or specialized facilities. This significantly limits the user's range of movement and independence.

[0003] Chinese Patent CN218792819U discloses a wheelchair with stair-climbing function, including a wheelchair frame. Armrests are fixed to the front and rear ends of the top of the wheelchair frame. A backrest is fixed to the right end of the wheelchair frame. A push rod is fixed to the right side of the top of each armrest, and a controller is fixed to the top of each armrest. A caster wheel is fixed to the left side of the bottom of the wheelchair frame. A stair-climbing mechanism is provided on the wheelchair frame. A battery is fixed to the right side of the inner side of the wheelchair frame. The stair-climbing mechanism has two movable wheels. This stair-climbing wheelchair, by incorporating a stair-climbing mechanism with stair-climbing tracks on the wheelchair frame, and controlling a motor via the controller, drives the stair-climbing tracks. With the assistance of the push rod, the stair-climbing tracks move, enabling the wheelchair to climb stairs. Simultaneously, the stair-climbing mechanism rotates the movable wheels, allowing for smooth movement on the ground. The overall movement is stable and convenient to use.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: when users climb ladders with the above-mentioned device, because the angle of the wheelchair is fixed, the user will be in a tilted state relative to the horizontal plane, which is unsafe and brings great psychological pressure to the user. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of not being able to adjust the angle and gap of the wheelchair. To address this, we propose a ladder-climbing and obstacle-crossing track mechanism for electric wheelchairs.

[0006] To achieve the above objectives, this application adopts the following technical solution: an obstacle-crossing track mechanism for an electric wheelchair, comprising: an electric wheelchair body, a mounting base fixedly installed at the bottom of the electric wheelchair body, a track climbing assembly disposed below the mounting base, and the track climbing assembly disposed between the wheels of the electric wheelchair body.

[0007] The tracked ladder assembly includes a pair of electric tracks, a pair of control boxes fixedly installed between the pair of electric tracks, and the pair of control boxes symmetrically fixedly installed at both ends of the inner sidewall of the pair of electric tracks. A first fixed rod is rotatably installed on the bottom surface of the mounting base near the rear wheel of the electric wheelchair body. A first rotating sleeve is rotatably fitted on the first fixed rod. Several electric telescopic rods are fixedly installed on the bottom surface of the first rotating sleeve. A second fixed rod is fixedly installed between the inner sidewall of the pair of electric tracks near the rear wheel of the electric wheelchair body. A second rotating sleeve is rotatably fitted on the second fixed rod. The movable ends of the several electric telescopic rods are fixedly installed on the top surface of the second rotating sleeve.

[0008] Preferably, a pair of mounting plates are fixedly mounted on the bottom surface of the mounting base away from the rear wheel of the electric wheelchair body. A threaded rod is rotatably mounted between the pair of mounting plates. A lead screw block is threaded onto the threaded rod. Several limiting rods are fixedly mounted between the pair of mounting plates. The lead screw block is slidably mounted on the several limiting rods. A forward and reverse motor is fixedly mounted on the bottom surface of the mounting base. The output shaft of the forward and reverse motor is coaxially fixedly connected to the threaded rod.

[0009] Preferably, a third fixing rod is fixedly installed on the bottom surface of the lead screw block, and a third rotating sleeve is rotatably sleeved on the third fixing rod. A fourth fixing rod is fixedly installed between the inner sidewalls of a pair of electric tracks near the front wheel of the electric wheelchair body, and a fourth rotating sleeve is rotatably sleeved on the fourth fixing rod. A push plate is fixedly installed between the third rotating sleeve and the fourth rotating sleeve.

[0010] Preferably, the axis of the second fixed rod and the fourth fixed rod are at the same distance from the top surface of the electric track, and there is a gap between the second rotating sleeve and the fourth rotating sleeve and the inner side wall of the adjacent control box.

[0011] Preferably, a fixed battery is fixedly installed on the top surface of the mounting base, and several control buttons are provided on the armrest of the electric wheelchair.

[0012] Preferably, the fixed battery is electrically connected to the electric wheelchair body, electric tracks, electric telescopic rod, forward and reverse motor, and control button. The control button is also electrically connected to the electric wheelchair body, electric tracks, electric telescopic rod, and forward and reverse motor.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] In this invention, by setting up a tracked ladder assembly, the user can control the threaded rod to slowly rotate forward during the climbing process, so that the position of the electric wheelchair body gradually returns to horizontal, avoiding excessive tilt angle of the electric wheelchair body from affecting the user. When the electric track has completely moved onto the stairs, the forward and reverse motors stop, so that the user is in a horizontal position, ensuring the safety of use. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0016] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the external three-dimensional structure of the present invention. Figure 2

[0018] Figure 3 This is a schematic diagram of the external structure of the tracked ladder assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the tracked ladder assembly of this utility model;

[0020] Figure 5 A schematic diagram of the ladder in preparation state for this utility model;

[0021] Figure 6 This is a schematic diagram of the initial state structure of the ladder of this utility model;

[0022] Figure 7 This is a schematic diagram of the ladder climbing success state structure of this utility model.

[0023] Legend: 1. Electric wheelchair body; 2. Mounting base plate; 3. Tracked ladder assembly; 301. Electric track; 302. Control box; 303. First fixed rod; 304. First rotating sleeve; 305. Electric telescopic rod; 306. Second fixed rod; 307. Second rotating sleeve; 308. Fixed mounting plate; 309. Threaded rod; 310. Lead screw block; 311. Limiting rod; 312. Forward and reverse motor; 313. Third fixed rod; 314. Third rotating sleeve; 315. Fourth fixed rod; 316. Fourth rotating sleeve; 317. Push plate; 4. Fixed battery; 5. Control button. Detailed Implementation

[0024] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0025] Reference Figures 1 to 4As shown, this utility model provides a technical solution: a crawler-mounted obstacle-crossing mechanism for an electric wheelchair, comprising: an electric wheelchair body 1, with a mounting base plate 2 fixedly installed at the bottom of the electric wheelchair body 1. The mounting base plate 2 serves as a support and connecting platform for the entire crawler-mounted assembly 3, ensuring a stable connection between the crawler mechanism and the electric wheelchair body 1. The crawler-mounted assembly 3 is located below the mounting base plate 2, cleverly positioned between the wheels of the electric wheelchair body 1. This layout allows the entire mechanism to remain compact when folded, without affecting the normal driving and passage of the wheelchair, while providing effective obstacle-crossing support when unfolded.

[0026] The tracked ladder assembly 3 includes a pair of electric tracks 301, which are the core components for climbing and overcoming obstacles. They drive the tracks to rotate using their own power, enabling the wheelchair to climb steps or ramps. A pair of control boxes 302 are fixedly installed between the pair of electric tracks 301. These control boxes 302 integrate the motors, reducers, and control circuits required to drive the electric tracks 301, serving as the power and control center of the track mechanism. The pair of control boxes 302 are symmetrically fixed at both ends of the inner sidewalls of the pair of electric tracks 301. This symmetrical installation ensures uniform force distribution and stable operation of the track mechanism.

[0027] To enable the track mechanism to extend and retract, a first fixed rod 303 is rotatably mounted on the bottom surface of the mounting base 2 near the rear wheel of the electric wheelchair body 1. The first fixed rod 303 serves as the fulcrum for rotation at the rear of the track mechanism. A first rotating sleeve 304 is rotatably fitted onto the first fixed rod 303, allowing it to rotate around the first fixed rod 303. Several electric telescopic rods 305 are fixedly mounted on the bottom surface of the first rotating sleeve 304. These electric telescopic rods 305 are key actuators for extending and retracting the track mechanism; they are driven by an internal motor and can achieve precise length adjustment. A second fixed rod 306 is fixedly mounted between a pair of electric tracks 301 near the inner sidewall of the rear wheel of the electric wheelchair body 1. The second fixed rod 306 serves as the connection point for the rear of the electric tracks 301. A second rotating sleeve 307 is rotatably fitted onto the second fixed rod 306, allowing it to rotate around the second fixed rod 306 and connect to the movable end of the electric telescopic rod 305. The movable ends of several electric telescopic rods 305 are fixedly installed on the top surface of the second rotating sleeve 307. When the electric telescopic rods 305 extend or retract, they will drive the electric track 301 to move, thereby realizing the unfolding (extending downward) or retraction (folding upward) of the track mechanism.

[0028] A pair of mounting plates 308 are fixedly mounted on the bottom surface of the mounting base 2, away from the rear wheel of the electric wheelchair body 1. These mounting plates 308 provide a stable mounting base for the subsequent drive mechanism. A threaded rod 309 is rotatably mounted between the pair of mounting plates 308. The threaded rod 309 is a key component for achieving linear motion. A lead screw block 310 is threaded onto the threaded rod 309, and the lead screw block 310 can move along the axial direction of the threaded rod 309. Several limiting rods 311 are fixedly mounted between the pair of mounting plates 308. The lead screw block 310 is slidably sleeved on the limiting rods 311. The limiting rods 311 prevent the lead screw block 310 from rotating, ensuring that it can only perform linear reciprocating motion, thereby guaranteeing the smoothness and accuracy of the motion. A forward and reverse motor 312 is fixedly mounted on the bottom surface of the mounting base 2. The output shaft of the forward and reverse motor 312 is coaxially and fixedly connected to the threaded rod 309. When the forward and reverse motor 312 rotates, it will drive the threaded rod 309 to rotate, which in turn drives the lead screw block 310 to move axially along the threaded rod 309.

[0029] Furthermore, a third fixed rod 313 is fixedly installed on the bottom surface of the lead screw block 310, and a third rotating sleeve 314 is rotatably sleeved on the third fixed rod 313, allowing the third rotating sleeve 314 to rotate around the third fixed rod 313. A fourth fixed rod 315 is fixedly installed between the inner walls of the front wheels of a pair of electric tracks 301 near the electric wheelchair body 1, and a fourth rotating sleeve 316 is rotatably sleeved on the fourth fixed rod 315, allowing the fourth rotating sleeve 316 to rotate around the fourth fixed rod 315. A push plate 317 is fixedly installed between the third rotating sleeve 314 and the fourth rotating sleeve 316. When the lead screw block 310 moves under the drive of the forward and reverse motor 312, the third fixed rod 313, the third rotating sleeve 314, and the push plate 317 will drive the front of the electric tracks 301 to move, thereby realizing the deployment or retraction of the front of the track mechanism. This works in conjunction with the rear electric telescopic rod 305 to make the deployment and retraction process of the entire track mechanism more stable and controllable.

[0030] In a preferred embodiment, the axes of the second fixing rod 306 and the fourth fixing rod 315 are aligned with the top surface of the electric track 301. This means that the relative positional relationship between the track mechanism and the electric wheelchair body 1 is more stable during deployment and retraction, helping to maintain the overall balance and structural strength of the track mechanism. The second rotating sleeve 307 and the fourth rotating sleeve 316 have gaps between them and the inner walls of adjacent control boxes 302. This gap is designed to prevent interference between the second rotating sleeve 307 and the fourth rotating sleeve 316 and the control box 302 during rotation or movement, ensuring smooth movement of the mechanism.

[0031] In a preferred embodiment, a fixed battery 4 is fixedly mounted on the top surface of the mounting base plate 2. This fixed battery 4 provides power to the entire electric wheelchair and the tracked ladder mechanism. Several control buttons 5 are provided on the armrest of the electric wheelchair body 1. These control buttons 5 are the interface for the user to operate the tracked mechanism. By pressing different buttons, the user can realize functions such as unfolding and retracting the tracked mechanism and driving the electric track 301, which greatly improves the convenience of operation.

[0032] The fixed battery 4 is electrically connected to the electric wheelchair body 1, electric tracks 301, electric telescopic rod 305, forward / reverse motor 312, and control button 5. This means that the fixed battery 4 is the core power source of the entire system, providing stable power support for the electric wheelchair's movement, the deployment and retraction of the track mechanism, and the drive of the tracks. The control button 5 is also electrically connected to the electric wheelchair body 1, electric tracks 301, electric telescopic rod 305, and forward / reverse motor 312. This indicates that the control button 5 is the control center of the entire system. By operating the control button 5, the user can send commands to the electric wheelchair body 1 (controlling wheelchair movement), the electric tracks 301 (controlling track rotation), the electric telescopic rod 305 (controlling the extension and retraction of the rear of the tracks), and the forward / reverse motor 312 (controlling the extension and retraction of the front of the tracks), achieving integrated control of the entire electric wheelchair and the obstacle-crossing track mechanism. This integrated electrical connection and control method greatly improves the system's automation level and ease of use.

[0033] like Figures 5 to 7 As shown, when climbing a ladder is required, the user pushes the rear of the electric track 301 via the electric telescopic rod 305, causing the electric track 301 to rotate around the third fixed rod 313. After the rear of the electric track 301 contacts the ground, it lifts the rear wheels of the electric wheelchair body 1. By controlling the forward and reverse motor 312, the threaded rod 309 rotates forward, causing the lead screw block 310 to move towards the front wheels of the electric wheelchair body 1. When the lead screw block 310 moves, it pushes the front of the electric track 301 through the third rotating sleeve 314, the push plate 317, and the fourth rotating sleeve 316, causing the electric track 301 to rotate around the second fixed rod 306. After the entire electric track 301 contacts the ground, the electric track 301 is activated, and the user climbs the stairs under the action of the electric track 301. During the climbing process, the threaded rod 309 slowly rotates in the forward direction, so that the position of the electric wheelchair body 1 gradually returns to horizontal, avoiding excessive tilt angle of the electric wheelchair body 1 from affecting the user. When the electric track 301 has completely moved onto the stairs, the forward and reverse motor 312 stops, so that the user is in a horizontal position.

[0034] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A ladder-climbing and obstacle-crossing track mechanism for an electric wheelchair, characterized in that, The electric wheelchair body (1) includes an electric wheelchair body (1), an mounting base plate (2) is fixedly installed at the bottom of the electric wheelchair body (1), a track ladder assembly (3) is provided below the mounting base plate (2), and the track ladder assembly (3) is arranged between the wheels of the electric wheelchair body (1). The tracked ladder assembly (3) includes a pair of electric tracks (301), a pair of control boxes (302) are fixedly installed between the pair of electric tracks (301), and the pair of control boxes (302) are symmetrically fixedly installed at both ends of the inner sidewall of the pair of electric tracks (301). A first fixing rod (303) is rotatably installed on the bottom surface of the mounting base (2) near the rear wheel of the electric wheelchair body (1). A first rotating sleeve (304) is rotatably sleeved on the first fixing rod (303). A plurality of electric telescopic rods (305) are fixedly installed on the bottom surface of the first rotating sleeve (304). A second fixing rod (306) is fixedly installed between the inner sidewall of the pair of electric tracks (301) near the rear wheel of the electric wheelchair body (1). A second rotating sleeve (307) is rotatably sleeved on the second fixing rod (306). The movable ends of the plurality of electric telescopic rods (305) are fixedly installed on the top surface of the second rotating sleeve (307).

2. The ladder-climbing obstacle-crossing track mechanism for the electric wheelchair according to claim 1, characterized in that: A pair of mounting plates (308) are fixedly mounted on the bottom surface of the mounting base (2) away from the rear wheel of the electric wheelchair body (1). A threaded rod (309) is rotatably mounted between the pair of mounting plates (308). A screw block (310) is threaded on the threaded rod (309). A number of limiting rods (311) are fixedly mounted between the pair of mounting plates (308). The screw block (310) is slidably mounted on the number of limiting rods (311). A forward and reverse motor (312) is fixedly mounted on the bottom surface of the mounting base (2). The output shaft of the forward and reverse motor (312) is coaxially fixedly connected to the threaded rod (309).

3. The ladder-climbing obstacle-crossing track mechanism for an electric wheelchair according to claim 2, characterized in that: A third fixing rod (313) is fixedly installed on the bottom surface of the lead screw block (310). A third rotating sleeve (314) is rotatably sleeved on the third fixing rod (313). A fourth fixing rod (315) is fixedly installed between the inner sidewalls of the electric track (301) and the front wheel of the electric wheelchair body (1). A fourth rotating sleeve (316) is rotatably sleeved on the fourth fixing rod (315). A push plate (317) is fixedly installed between the third rotating sleeve (314) and the fourth rotating sleeve (316).

4. The ladder-climbing obstacle-crossing track mechanism for the electric wheelchair according to claim 3, characterized in that: The axis of the second fixed rod (306) and the fourth fixed rod (315) is at the same distance from the top surface of the electric track (301), and there is a gap between the second rotating sleeve (307) and the fourth rotating sleeve (316) on the inner side wall of the adjacent control box (302).

5. The ladder-climbing obstacle-crossing track mechanism for an electric wheelchair according to claim 3, characterized in that: A fixed battery (4) is fixedly installed on the top surface of the mounting base plate (2), and several control buttons (5) are provided on the armrest of the electric wheelchair body (1).

6. The ladder-climbing obstacle-crossing track mechanism for an electric wheelchair according to claim 5, characterized in that: The fixed battery (4) is electrically connected to the electric wheelchair body (1), electric track (301), electric telescopic rod (305), forward and reverse motor (312) and control button (5). The control button (5) is electrically connected to the electric wheelchair body (1), electric track (301), electric telescopic rod (305) and forward and reverse motor (312).

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