Crawler-type electric wheelchair

Abstract

The utility model discloses a crawler-type electric wheelchair. The wheelchair comprises a main frame; the driving assembly comprises a hub motor, a first supporting wheel, a first driving wheel and a second driving wheel, the first supporting wheel is rotationally connected with the main frame, the hub motor drives the first supporting wheel to rotate, the first driving wheel and the second driving wheel are fixedly connected with the first supporting wheel, and the first supporting wheel is located between the first driving wheel and the second driving wheel; the foot crawler belt assembly comprises a first crawler belt, a first driven wheel and a first rotating arm, the first driving wheel and the first driven wheel are rotationally connected with the first rotating arm, the first driving wheel drives the first crawler belt to move, and the first driven wheel is fixedly connected with a second supporting wheel; and the back crawler belt assembly comprises a second crawler belt and a second rotating arm, and the second driving wheel is rotationally connected with the second rotating arm. The crawler-type electric wheelchair can cross obstacles, the obstacle crossing capacity of the crawler-type electric wheelchair is improved, and the crawler-type electric wheelchair is suitable for more use scenes.

Description

Technical Field

[0001] This utility model generally relates to the field of wheelchairs, and more particularly to a tracked electric wheelchair. Background Technology

[0002] A stair-climbing wheelchair is a special type of wheelchair that assists people with mobility impairments in climbing stairs. While regular wheelchairs are only suitable for flat surfaces, stair-climbing wheelchairs are necessary for individuals with limited leg mobility who require access to stairs where elevators are unavailable. Tracked electric wheelchairs are a type of stair-climbing wheelchair, utilizing tracks located at the back of the wheelchair for climbing stairs.

[0003] In the existing technology, the obstacle-crossing ability of tracked electric wheelchairs is similar to that of ordinary wheelchairs, and it is necessary to improve the obstacle-crossing ability to adapt to various usage scenarios. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a tracked electric wheelchair with strong obstacle-crossing ability.

[0005] In a first aspect, the tracked electric wheelchair of this utility model includes:

[0006] Main frame;

[0007] The drive assembly includes a hub motor, a first support wheel, a first drive wheel, and a second drive wheel. The first support wheel is rotatably connected to the main frame. The hub motor drives the first support wheel to rotate. The first drive wheel and the second drive wheel are respectively fixedly connected to the first support wheel. The first support wheel is located between the first drive wheel and the second drive wheel.

[0008] A foot track assembly includes a first track, a first driven wheel, and a first rotating arm. The first drive wheel and the first driven wheel are rotatably connected to the first rotating arm. The first drive wheel drives the first track to move. A second support wheel is fixedly connected to the first driven wheel.

[0009] The back track assembly includes a second track and a second swing arm, with a second drive wheel rotatably connected to the second swing arm, and the second drive wheel driving the second track to move.

[0010] The first support wheel and the second support wheel are exposed from the lower surface of the first track.

[0011] According to the technical solution provided in this application, when used on flat ground, the hub motor drives the first and second support wheels to rotate. The first and second support wheels together support the main frame, enabling the tracked electric wheelchair to move on flat ground. When going up or down stairs, the tracked electric wheelchair is tilted, causing the back track assembly to support the main frame, and the second track to contact the stairs, propelling the tracked electric wheelchair up and down the stairs. When encountering obstacles on flat ground, the foot track assembly supports the main frame, meaning the first track propels the tracked electric wheelchair to move, enabling the tracked electric wheelchair to overcome obstacles, thus improving the obstacle-crossing ability of the tracked electric wheelchair and adapting it to more usage scenarios. Attached Figure Description

[0012] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a front view of a tracked electric wheelchair according to an embodiment of the present invention;

[0014] Figure 2 The image shows a right view of a tracked electric wheelchair according to an embodiment of the present invention.

[0015] Figure 3 This is a top view of a tracked electric wheelchair according to an embodiment of the present invention;

[0016] Figure 4 This is a perspective view of a tracked electric wheelchair according to an embodiment of the present invention;

[0017] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0018] Figure 6 for Figure 4 A magnified view of a section at point B in the middle;

[0019] Figure 7 This is a schematic diagram of the tracked electric wheelchair in a folded state, according to an embodiment of the present invention.

[0020] Figure 8 This is a schematic diagram of the damping frame of a tracked electric wheelchair according to an embodiment of the present invention.

[0021] Figure 9 This is a schematic diagram of the drive assembly of a tracked electric wheelchair according to an embodiment of the present invention.

[0022] Figure 10 This is a schematic diagram of the structure of the first fixed seat and the first rotating arm of the tracked electric wheelchair according to an embodiment of the present invention. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Please refer to Figures 1-10 The present invention relates to a tracked electric wheelchair, comprising: a main frame 100; a drive assembly 200, which includes a hub motor 210, a first support wheel 220, a first drive wheel 230, and a second drive wheel 240, wherein the first support wheel 220 is rotatably connected to the main frame 100, the hub motor 210 drives the first support wheel 220 to rotate, the first drive wheel 230 and the second drive wheel 240 are respectively fixedly connected to the first support wheel 220, and the first support wheel 220 is located between the first drive wheel 230 and the second drive wheel 240; and a foot track assembly 300, which includes a first track 310, a first... Driven wheel 320 and first rotating arm 330, first drive wheel 230 and first driven wheel 320 are rotatably connected to first rotating arm 330 respectively, first drive wheel 230 drives first track 310 to move, first driven wheel 320 is fixedly connected to second support wheel 321; and back track assembly 400, which includes second track 410 and second rotating arm 430, second drive wheel 240 is rotatably connected to second rotating arm 430, second drive wheel 240 drives second track 410 to move, first support wheel 220 and second support wheel 321 are exposed from the lower surface of first track 310 respectively.

[0026] In an embodiment of this utility model, the drive assembly 200 includes a hub motor 210, a first support wheel 220, a first drive wheel 230, and a second drive wheel 240. The first support wheel 220 is located between the first drive wheel 230 and the second drive wheel 240. The first drive wheel 230 and the second drive wheel 240 are fixedly connected to the first support wheel 220, so that the forces on both sides of the first support wheel 220 are balanced. The hub motor 210 drives the first drive wheel 230 to rotate, thereby causing the first drive wheel 230 and the second drive wheel 240 to rotate. The first drive wheel 230 drives the first track 310 to move, which in turn drives the foot track assembly 300 to move. When encountering obstacles on flat ground, the foot track assembly 300 supports the main frame 100, meaning that the first track 310 drives the tracked electric wheelchair to move, enabling the tracked electric wheelchair to overcome obstacles, improving the obstacle-crossing ability of the tracked electric wheelchair, and adapting to more usage scenarios. The second drive wheel 240 drives the second track 410, which in turn moves the back track assembly 400. When going up or down stairs, the tracked electric wheelchair is tilted, causing the back track assembly 400 to support the main frame 100, and the second track 410 to contact the stairs, thus moving the tracked electric wheelchair up and down the stairs. The first support wheel 220 and the second support wheel 321 protrude from the lower surface of the first track 310. When used on flat ground, the hub motor 210 drives the first support wheel 220 and the second support wheel 321 to rotate. The first support wheel 220 and the second support wheel 321 together support the main frame 100, allowing the tracked electric wheelchair to move on flat ground. By using the hub motor 210 to drive the first support wheel 220, the first drive wheel 230, and the second drive wheel 240 to move synchronously, the structure of the drive assembly 200 is more compact, facilitating the lightweight design of the tracked electric wheelchair.

[0027] A battery can be installed on the main frame 100 to store electrical energy and power the hub motor 210.

[0028] Furthermore, the main frame 100 is fixedly connected to a rotating shaft 110, and the drive assembly 200 is rotatably connected to the rotating shaft 110.

[0029] In the embodiments of this utility model, the drive component 200 is rotatably connected to the rotating shaft 110, thereby realizing the rotatable connection between the drive component 200 and the main frame 100 and ensuring the reliability of the rotatable connection.

[0030] refer to Figure 4 and 6 Furthermore, the rotating shaft 110 is fixedly connected to the first side plate 111, the first side plate 111 is fixedly connected to the first gear 112, the first rotating arm 330 is fixedly connected to the first motor 331, the first rotating arm 330 is rotatably connected to the second gear 332, the second gear 332 meshes with the first gear 112, and the first motor 331 drives the second gear 332 to rotate.

[0031] In this embodiment of the invention, the first side plate 111 is fixedly connected to the rotating shaft 110, and the first gear 112 is fixedly connected to the first side plate 111. When it is necessary to adjust the angle of the first rotating arm 330, the first motor 331 drives the second gear 332 to rotate. Since the first gear 112 and the second gear 332 mesh, the second gear 332 moves around the first gear 112, thereby driving the first rotating arm 330 to rotate relative to the rotating shaft 110, thus adjusting the angle of the first rotating arm 330, which is to say, adjusting the angle of the foot track assembly 300. When it is necessary to store the tracked electric wheelchair, the angle of the foot track assembly 300 can be adjusted to reduce the storage space required for the tracked electric wheelchair. When it is necessary to use the tracked electric wheelchair, the angle of the foot track assembly 300 can be adjusted so that the foot track assembly 300 is in the normal use position.

[0032] A battery can be installed on the main frame 100 to store electrical energy and power the first motor 331.

[0033] refer to Figure 5 and 6 Furthermore, the rotating shaft 110 is fixedly connected to the second side plate 113, the second side plate 113 is fixedly connected to the third gear 114, the second rotating arm 430 is fixedly connected to the second motor 431, the second rotating arm 430 is rotatably connected to the fourth gear 432, the third gear 114 meshes with the fourth gear 432, and the second motor 431 drives the fourth gear 432 to rotate.

[0034] In this embodiment of the invention, the second side plate 113 is fixedly connected to the rotating shaft 110, and the second gear 332 is fixedly connected to the second side plate 113. When it is necessary to adjust the angle of the second rotating arm 430, the second motor 431 drives the second gear 332 to rotate. Since the second gears 332 mesh with each other, the second gears 332 move around the rotating shaft 110, thereby driving the second rotating arm 430 to rotate relative to the rotating shaft 110, thus adjusting the angle of the second rotating arm 430, which is to say, adjusting the angle of the back track assembly 400. When it is necessary to store the tracked electric wheelchair, the angle of the back track assembly 400 can be adjusted to reduce the storage space required for the tracked electric wheelchair. When it is necessary to use the tracked electric wheelchair, the angle of the back track assembly 400 can be adjusted so that the back track assembly 400 is in the normal use position.

[0035] A battery can be installed on the main frame 100 to store electrical energy and power the second motor 431.

[0036] Furthermore, the second support wheel 321 is a Mecanum wheel.

[0037] In an embodiment of this invention, when used on flat ground, the hub motor 210 drives the first support wheel 220 and the second support wheel 321 to rotate. The first support wheel 220 and the second support wheel 321 together support the main frame 100, enabling the tracked electric wheelchair to move on flat ground. The first support wheel 220 is the rear wheel, and the second support wheel 321 is the front wheel. The second support wheel 321 is configured as a Mecanum wheel, allowing it to move in all directions and improving the flexibility of the tracked electric wheelchair.

[0038] refer to Figure 10 Furthermore, the foot track assembly 300 includes a first fixed seat 340, a first driven wheel 320 rotatably connected to the first fixed seat 340, the first driven wheel 320 and the first drive wheel 230 jointly tensioning the first track 310, a first rotating arm 330 screwed with a first bolt 341, the first bolt 341 abutting against the first fixed seat 340, the first fixed seat 340 fixedly connected with multiple first sliding rods 342, and the first sliding rods 342 partially inserted into the first rotating arm 330.

[0039] In this embodiment of the invention, when installing the foot track assembly 300, the first track 310 is routed around the first drive wheel 230 and the first driven wheel 320. By rotating the first bolt 341, the length of the first bolt 341 extending out of the first rotating arm 330 is adjusted. The first bolt 341 abuts against the first fixed seat 340, which adjusts the distance between the first fixed seat 340 and the first rotating arm 330, and thus the distance between the first driven wheel 320 and the first drive wheel 230. This ensures that the first driven wheel 320 and the first drive wheel 230 can tension the first track 310, guaranteeing that the first track 310 can work normally and preventing it from becoming loose, thereby improving the reliability of the tracked electric wheelchair.

[0040] When rotating the first bolt 341 to adjust the distance between the first fixed seat 340 and the first rotating arm 330, the first sliding rod 342 is always partially inserted into the first rotating arm 330. Through the cooperation between the first sliding rod 342 and the first rotating arm 330, the movement range of the first fixed seat 340 is limited, preventing the first fixed seat 340 from shifting, and ensuring the stability and reliability of the first drive wheel 230 and the first driven wheel 320 tensioning the first track 310.

[0041] Furthermore, a first guide rod 343 is fixedly connected to the side of the first bolt 341 near the first fixed seat 340, and the first guide rod 343 is inserted into the first fixed seat 340.

[0042] In an embodiment of this utility model, the first guide rod 343 is inserted into the first fixed seat 340 to restrict the movement of the first bolt 341, prevent the first bolt 341 from dislodging from the first fixed seat 340, and ensure the reliability of the first bolt 341 abutting against the first fixed seat 340.

[0043] Furthermore, the back track assembly 400 includes a second fixed seat and a second driven wheel 420. The second driven wheel 420 is rotatably connected to the second fixed seat. The second driven wheel 420 and the second drive wheel 240 together tension the second track 410. A second bolt is screwed onto the second rotating arm 430. The second bolt abuts against the second fixed seat. The second fixed seat is fixedly connected to multiple second sliding rods. The second sliding rods are partially inserted into the second rotating arm 430.

[0044] In this embodiment of the invention, when installing the back track assembly 400, the second track 410 is routed around the second drive wheel 240 and the second driven wheel 420. By rotating the second bolt, the length of the second bolt extending beyond the second rotating arm 430 is adjusted. The second bolt abuts against the second fixed seat, which adjusts the distance between the second fixed seat and the second rotating arm 430, and thus the distance between the second driven wheel 420 and the second drive wheel 240. This ensures that the second driven wheel 420 and the second drive wheel 240 can tension the second track 410, guaranteeing its normal operation and preventing it from becoming loose, thereby improving the reliability of the tracked electric wheelchair.

[0045] When the second bolt is rotated to adjust the distance between the second fixed seat and the second rotating arm 430, the second slide rod is always partially inserted into the second rotating arm 430. Through the cooperation between the second slide rod and the second rotating arm 430, the movement range of the second fixed seat is limited, preventing the second fixed seat from shifting, and ensuring the stability and reliability of the second drive wheel 240 and the second driven wheel 420 in tensioning the second track 410.

[0046] Furthermore, a second guide rod is fixedly connected to the side of the second bolt near the second fixed seat, and the second guide rod is inserted into the second fixed seat.

[0047] In an embodiment of this utility model, the second guide rod is inserted into the second fixed seat to restrict the movement of the second bolt, prevent the second bolt from dislodging from the second fixed seat, and ensure the reliability of the second bolt abutting against the second fixed seat.

[0048] refer to Figure 8Furthermore, the main frame 100 includes a damping frame 120, a seat 130, and a backrest 140. The damping frame 120 includes a lower support 121, a shock absorber 122, an upper support 123, a folding slider 126, an inner rod 124, and a third slide rod 125. The shock absorber 122 is located between the upper support 123 and the lower support 121. The drive assembly 200 is rotatably connected to the lower support 121. The lower support 121 is fixedly connected to the inner rod 124. The upper support 123 is fixedly connected to the third slide rod 125. Part of the inner rod 124 is inserted into the third slide rod 125. The folding slider 126 is connected to the third slide rod 125. 5. Sliding connection: Folding slider 126 is fixedly connected to backrest 140. Seat 130 is rotatably connected to backrest 140. Seat 130 is rotatably connected to first link 131 and second link 132 respectively. First link 131 is rotatably connected to upper bracket 123. Second link 132 is rotatably connected to third link 134. Second link 132 and backrest 140 are rotatably connected to third link 134 respectively. Foot pedal 133 is provided at the bottom of second link 132. Multiple third support wheels 141 are rotatably connected to the bottom of backrest 140. Handle 142 is fixedly connected to the top of backrest 140.

[0049] In this embodiment of the invention, when using the tracked electric wheelchair normally, the seat 130 can be rotated so that the seat 130 is perpendicular to the backrest 140, unfolding the electric wheelchair. When storing the tracked electric wheelchair, the seat 130 can be rotated so that the seat 130 is flush with the backrest 140, folding the electric wheelchair and reducing its storage space. After folding, the tracked electric wheelchair can be lifted using the handle 142, moving it. After folding, multiple third support wheels 141 work together to support the tracked electric wheelchair, facilitating its movement.

[0050] When using a tracked electric wheelchair, the seat is rotatably connected to a first link, which is rotatably connected to the upper frame. The shock absorber is located between the upper and lower frames. When the tracked electric wheelchair travels over bumpy roads, the shock absorber works to absorb the vibration of the seat.

[0051] When using a tracked electric wheelchair, the user can place both feet on the footrests while sitting in the seat, and the footrests can provide support for the feet.

[0052] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A tracked electric wheelchair, characterized in that, include: Main frame; The drive assembly includes a hub motor, a first support wheel, a first drive wheel, and a second drive wheel. The first support wheel is rotatably connected to the main frame. The hub motor drives the first support wheel to rotate. The first drive wheel and the second drive wheel are respectively fixedly connected to the first support wheel. The first support wheel is located between the first drive wheel and the second drive wheel. A foot track assembly includes a first track, a first driven wheel, and a first rotating arm. The first drive wheel and the first driven wheel are rotatably connected to the first rotating arm. The first drive wheel drives the first track to move. A second support wheel is fixedly connected to the first driven wheel. The back track assembly includes a second track and a second swing arm, with a second drive wheel rotatably connected to the second swing arm, and the second drive wheel driving the second track to move. The first support wheel and the second support wheel are exposed from the lower surface of the first track.

2. The tracked electrically powered wheelchair of claim 1, wherein, The main frame is fixedly connected to a rotating shaft, and the drive assembly is rotatably connected to the rotating shaft.

3. The tracked electrically powered wheelchair of claim 2, wherein, The rotating shaft is fixedly connected to a first side plate, the first side plate is fixedly connected to a first gear, the first rotating arm is fixedly connected to a first motor, the first rotating arm is rotatably connected to a second gear, the second gear meshes with the first gear, and the first motor drives the second gear to rotate.

4. The tracked electrically powered wheelchair of claim 2, wherein, The rotating shaft is fixedly connected to a second side plate, the second side plate is fixedly connected to a third gear, the second rotating arm is fixedly connected to a second motor, the second rotating arm is rotatably connected to a fourth gear, the third gear meshes with the fourth gear, and the second motor drives the fourth gear to rotate.

5. The tracked electrically powered wheelchair of claim 1, wherein, The second support wheel is a Mecanum wheel.

6. The tracked electrically powered wheelchair of claim 1, wherein, The foot track assembly includes a first fixed seat, a first driven wheel rotatably connected to the first fixed seat, the first driven wheel and the first drive wheel jointly tensioning the first track, a first bolt screwed onto the first rotating arm, the first bolt abutting against the first fixed seat, and a plurality of first sliding rods fixedly connected to the first fixed seat, with the first sliding rods partially inserted into the first rotating arm.

7. The tracked electrically powered wheelchair of claim 6, wherein, A first guide rod is fixedly connected to the side of the first bolt near the first fixed seat, and the first guide rod is inserted into the first fixed seat.

8. The tracked electrically powered wheelchair of claim 1, wherein, The back track assembly includes a second fixed seat and a second driven wheel. The second driven wheel is rotatably connected to the second fixed seat. The second driven wheel and the second drive wheel together tension the second track. The second rotating arm is screwed with a second bolt. The second bolt abuts against the second fixed seat. The second fixed seat is fixedly connected with multiple second sliding rods. The second sliding rods are partially inserted into the second rotating arm.

9. The tracked electrically powered wheelchair of claim 8, wherein, The second guide rod is fixedly connected to the side of the second bolt near the second fixing seat, and the second guide rod is inserted into the second fixing seat.

10. The tracked electrically powered wheelchair of claim 1, wherein, The main frame includes a damping frame, a seat, and a backrest. The damping frame includes a lower support, a shock absorber, an upper support, a folding slider, an inner rod, and a third sliding rod. The shock absorber is located between the upper support and the lower support. The drive assembly is rotatably connected to the lower support. The lower support is fixedly connected to the inner rod. The upper support is fixedly connected to the third sliding rod. The inner rod is partially inserted into the third sliding rod. The folding slider is slidably connected to the third sliding rod and is fixedly connected to the backrest. The seat is rotatably connected to the backrest. The seat is rotatably connected to a first link and a second link. The first link is rotatably connected to the upper support. The second link is rotatably connected to a third link. The second link and the backrest are rotatably connected to the third link. A foot pedal is provided at the bottom of the second link. Multiple third support wheels are rotatably connected to the bottom of the backrest. A handle is fixedly connected to the top of the backrest.

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