Hand-driven wheel train transmission wheelchair

Abstract

The utility model relates to the technical field of wheelchairs, and provides a hand-driven wheel train transmission wheelchair which comprises a seat and a driving mechanism arranged below the seat, and the driving mechanism comprises a frame, a front wheel, a rear wheel and a driving wheel, and the front wheel, the rear wheel and the driving wheel are rotationally arranged on the frame; a wheel train transmission set is connected between the driving wheel and the rear wheel in a meshed mode, and the driving wheel is rotated by hands to drive the rear wheel. Compared with a traditional hand-driven wheelchair, the hand-driven wheelchair is more labor-saving and beneficial to long-time use of a user.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, and more specifically, to a manually-driven wheel train transmission wheelchair. Background Art

[0002] A wheelchair is a means of transportation designed specifically for people with limited mobility, which can help people move without the assistance of others. And according to different power sources, it is usually divided into electric drive and manual drive. However, the conventional manual drive method of a wheelchair is to set a hand float drive ring with a diameter beside the roller of the wheel for the patient to drive. This structure is relatively laborious and extremely inconvenient for the patient to use for a long time. Content of the Utility Model

[0003] The purpose of the utility model is to provide a manually-driven wheel train transmission wheelchair which is more labor-saving and is conducive to long-distance use by the operator for a long time.

[0004] The utility model is realized through the following technical solutions: a manually-driven wheel train transmission wheelchair, including a seat and a driving mechanism arranged under the seat. The driving mechanism includes a frame and a front wheel, a rear wheel and a driving wheel rotatably arranged on the frame; a wheel train transmission group is meshed and connected between the driving wheel and the rear wheel, and the rear wheel is driven by manually rotating the driving wheel.

[0005] Further, the wheel train transmission group includes a first synchronous wheel and a second synchronous wheel, and the first synchronous wheel is coaxially arranged with the driving wheel, and the second synchronous wheel is coaxially arranged with the rear wheel.

[0006] Further, the wheel train transmission group further includes a transmission wheel arranged between the first synchronous wheel and the second synchronous wheel. The transmission wheel is respectively meshed and cooperated with the first synchronous wheel and the second synchronous wheel; the transmission wheel is rotatably connected to the frame.

[0007] Further, retaining ring grooves are arranged on the single sides of the first synchronous wheel, the second synchronous wheel and the transmission wheel.

[0008] Further, the diameter of the first synchronous wheel is larger than that of the second synchronous wheel.

[0009] Further, the front wheel is a universal wheel.

[0010] Further, a support rod extending obliquely downward is arranged at the front end of the frame, and a footrest is installed at the front end of the support rod.

[0011] Further, a fender is arranged on the rear wheel.

[0012] Further, armrests are arranged on both sides of the seat, and a pusher is arranged on the back side of the seat.

[0013] The technical solutions of the embodiments of the present utility model have at least the following advantages and beneficial effects:

[0014] 1. A gear train transmission group is arranged between the driving wheel and the rear wheel for transmission. The driving wheel is suspended above the rear wheel and the front wheel, which not only ensures the cleanliness of the driving wheel but also realizes the effect of the large driving wheel driving the small wheel forward, making it more labor-saving for manual driving.

[0015] 2. The fender is provided to effectively prevent mud and water and germs from splashing onto and adhering to the driving wheel, realizing the physical isolation between the driving wheel and the rear wheel and preventing the hands from coming into contact with mud, water and germs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Structural schematic diagram of the hand-driven gear train transmission wheelchair provided for the embodiments of the present utility model;

[0018] Figure 2 Cross-sectional view of the wheelchair in the present utility model;

[0019] Figure 3 Structural schematic diagram of the gear train transmission group in the present utility model.

[0020] Reference numerals: 1 - seat, 2 - driving mechanism, 21 - frame, 22 - front wheel, 23 - rear wheel, 24 - driving wheel, 3 - gear train transmission group, 31 - first synchronous wheel, 32 - second synchronous wheel, 321 - retaining ring, 33 - transmission wheel, 4 - footrest, 5 - fender, 6 - armrest, 7 - pusher, 8 - support rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0023] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] The following is further described in conjunction with specific embodiments. Referring to Figures 1 - 3 As shown, this embodiment is a hand-driven gear train transmission wheelchair, which includes a seat 1 and a driving mechanism 2 provided under the seat 1. The driving mechanism 2 includes a frame 21, a front wheel 22, a rear wheel 23 and a driving wheel 24 rotatably provided on the frame 21; and the driving wheel 24 is suspended above the front wheel 22 and the rear wheel 23 so as not to contact the ground; a gear train transmission group 3 is meshingly connected between the driving wheel 24 and the rear wheel 23, and the rear wheel 23 is driven by manually rotating the driving wheel 24; specifically, the driving wheel 24 is suspended on both sides of the frame 21 and is close to the seat 1 for easy operation by the user. The diameter of the driving wheel 24 is larger than that of the rear wheel 23. When the user drives several gears in the gear train transmission group 3 to rotate through the driving wheel 24 until the rear wheel 23 moves forward, it realizes that the large wheel drives the small wheel, which is more labor-saving than the traditional manually driven wheelchair.

[0025] Referring to Figure 3 As shown, the gear train transmission group 3 in this embodiment includes a first synchronous wheel 31 and a second synchronous wheel 32, and the first synchronous wheel 31 is coaxially arranged with the driving wheel 24, and the second synchronous wheel 32 is coaxially arranged with the rear wheel 23; the gear train transmission group 3 further includes a transmission wheel 33 provided between the first synchronous wheel 31 and the second synchronous wheel 32, and the transmission wheel 33 is meshingly engaged with the first synchronous wheel 31 and the second synchronous wheel 32 respectively; the transmission wheel 33 is rotatably connected to the frame 21; specifically, manually rotating the driving wheel 24 synchronously drives the first synchronous wheel 31 to rotate, and the rotation is transmitted to the second synchronous wheel 32 by the transmission wheel 33 to drive the rear wheel 23 to rotate, thereby providing forward driving force for the wheelchair.

[0026] Referring to Figure 3 As shown, retaining ring grooves 321 are provided on the single sides of the first synchronous wheel 31, the second synchronous wheel 32 and the transmission wheel 33 in this embodiment; specifically, the retaining ring grooves 321 between adjacent two wheels are arranged in opposite directions, effectively preventing axial displacement of the first synchronous wheel 31, the transmission wheel 33 and the second synchronous wheel 32 during rotation, resulting in disengagement of the meshing connection.

[0027] As Figure 3As shown, the diameter of the first synchronous wheel 31 is larger than that of the second synchronous wheel 32. Therefore, when the large wheel drives the small wheel, since the radius of the large wheel is greater than that of the small wheel, according to the lever principle (i.e., power × power arm = resistance × resistance arm), when the power arm (radius of the large wheel) is relatively long, the required power (i.e., the applied force) will be relatively small. Thus, it is relatively easier for the user to drive the wheelchair.

[0028] As Figure 1 and Figure 2 shown, the front wheel 22 is a universal wheel, which can facilitate the steering adjustment of the wheelchair during the traveling process.

[0029] As Figure 1 shown, a support rod 8 extending obliquely downward is provided at the front end of the frame 21, and a footrest 4 is installed at the front end of the support rod 8, which is mainly used to support the feet of the patient.

[0030] Referring to Figure 1 shown, a circular fender 5 is provided on the rear wheel 23, which can prevent the muddy water and germs adhered when the rear wheel 23 rotates too fast from being thrown onto the drive wheel 24, thus causing the hands of the user to come into contact with the muddy water when touching the drive wheel 24.

[0031] Meanwhile, armrests 6 are provided on both sides of the seat 1 to support the hands of the user and also prevent the user from falling from the side. And a pusher 7 is provided on the back side of the seat 1, which is convenient for others to perform transfer operations such as pushing the wheelchair.

[0032] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various modifications and changes can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hand-driven gear train transmission wheelchair, comprising a seat (1) and a driving mechanism (2) provided under the seat (1), characterized in that: The driving mechanism (2) includes a vehicle frame (21), a front wheel (22), a rear wheel (23), and a driving wheel (24) rotatably provided on the vehicle frame (21); A gear train transmission group (3) is meshed and connected between the driving wheel (24) and the rear wheel (23), and the driving wheel (24) is rotated by hand to drive the rear wheel (23).

2. The manually driven gear train wheelchair according to claim 1, wherein: The gear train transmission group (3) includes a first synchronous wheel (31) and a second synchronous wheel (32) meshed and connected therewith, and the first synchronous wheel (31) is coaxially arranged with the driving wheel (24), and the second synchronous wheel (32) is coaxially arranged with the rear wheel (23).

3. The manually-driven gear train transmission wheelchair according to claim 2, wherein: The gear train transmission group (3) further includes a transmission wheel (33) arranged between the first synchronous wheel (31) and the second synchronous wheel (32), and the transmission wheel (33) is respectively meshed and cooperated with the first synchronous wheel (31) and the second synchronous wheel (32); The transmission wheel (33) is rotatably connected to the vehicle frame (21).

4. The hand-driven gear train transmission wheelchair according to claim 3, characterized in that: Circlips (321) are provided on the single side of the first synchronous wheel (31), the second synchronous wheel (32), and the transmission wheel (33).

5. The manually-driven gear train wheelchair according to any one of claims 2-4, characterized in that: The diameter of the first synchronous wheel (31) is larger than the diameter of the second synchronous wheel (32).

6. The manually-driven gear train transmission wheelchair according to claim 1, wherein: The front wheel (22) is a universal wheel.

7. The hand-driven gear train transmission wheelchair according to claim 1, wherein: A support rod (8) extending obliquely downward is provided at the front end of the vehicle frame (21), and a footrest (4) is installed at the front end of the support rod (8).

8. The hand-driven gear train wheelchair according to claim 1, wherein: A circular mudguard (5) is provided on the rear wheel (23).

9. The hand-driven gear train wheelchair according to claim 1, wherein: Armrests (6) are provided on both sides of the seat (1), and a pusher (7) is provided on the back side of the seat (1).

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