Climbing wheelchair
By introducing a sliding connection column and ratchet structure on the wheelchair, combining the toggle assembly and the elastic assembly, three mode switching is achieved, which solves the inconvenience and fatigue of manual wheelchairs when climbing hills, and improves the stability and safety of climbing hills.
Patent Information
- Application Number
- CN202422223106.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-11
AI Technical Summary
When climbing a hill, the user needs to accumulate speed to rush uphill or repeatedly operate the handwheel, which leads to fatigue and is prone to retreat when no one pushes it, making it inconvenient to use.
A hill climbing wheelchair is designed, using a sliding connection column and disc-shaped ratchet structure on the transmission shaft. Combining the toggle assembly and the elastic assembly, three mode switching is achieved: only forward, only backward and forward and backward movement, and through the cooperation of ratchets and ratchets, the wheelchair is crawling stably on the ramp.
It reduces the fatigue level of users when climbing hills, improves the stability and safety of climbing hills, and adapts to the use needs under different slopes and load conditions.
Smart Images
Figure CN223183707U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of manual wheelchairs, in particular to a climbing wheelchair. Background Art
[0002] A wheelchair is a chair equipped with wheels that can assist with walking. It is an essential means of mobility for the injured, sick, and disabled, particularly for home rehabilitation, transportation, medical appointments, and activities. Wheelchairs not only meet the mobility needs of those with physical disabilities and limited mobility, but more importantly, they facilitate family members' mobility and care, allowing patients to exercise and participate in social activities. A typical wheelchair consists of a frame, front and rear wheels, left and right knee pads and footrests, left and right armrests, a handlebar brake, a seat, and a backrest. They are available in manual and electric versions. Manual models require the user to manually rotate the rear wheels to move forward and backward, or be pushed by someone else.
[0003] But we often see a situation, that is, when a user is sitting in a manual wheelchair climbing a slope, if there is no one to push, usually the user either accumulates a certain amount of speed before climbing the slope; or turns the rear wheel forward by hand, and when released, the rear wheel rolls backward under the action of gravity. The user needs to feel to retract his hand and continue to push the rear wheel forward, and so on, until he reaches the top of the slope. In general, the user of a manual wheelchair is more tired when climbing a slope.
[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Utility Model Content
[0005] The purpose of the utility model is to design a wheelchair that can reduce the user's fatigue when climbing a slope without worrying about the wheelchair moving backward under the action of gravity and without accumulating a certain speed to climb the slope, so as to solve the above-mentioned deficiencies in the technology.
[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a climbing wheelchair, comprising a wheelchair frame, a transmission shaft rotatably mounted on the wheelchair frame, and hand wheels fixedly connected at both ends of the rotating shaft. A seat cushion is also installed on the wheelchair frame, a connecting column is axially slidably connected to the transmission shaft, and both sides of the connecting column are respectively provided with disc-shaped ratchets fixedly mounted on the transmission shaft, the tooth surfaces of the two disc-shaped ratchets are opposite and rotate in opposite directions, and the two ends of the connecting column are respectively provided with ratchets that match the tooth surfaces of the two disc-shaped ratchets, a toggle assembly for toggling the connecting column to fit the disc-shaped ratchet is installed on the mounting frame, and an elastic assembly is also installed on the mounting frame to apply elastic force to the disc-shaped ratchet to the toggle assembly.
[0007] Preferably, the shifting assembly includes a slide groove provided on the wheelchair frame, a slider slidably connected in the slide groove, and a shifting rod fixedly connected to one side of the slider, and the slider and the shifting rod are both fixedly connected to the surface of the connecting column.
[0008] Preferably, the elastic component includes a U-shaped rod fitted with the bottom surface of the wheelchair frame, a sliding rod passing through and slidably connected to the U-shaped rod, springs arranged on both sides of the sliding rod and between the U-shaped rod, and a locking kit installed on one side of the U-shaped rod, the sliding rod passing through the shift rod and fixedly connected to the shift rod, and the spring is sleeved outside the sliding rod.
[0009] Preferably, the locking kit includes a handle fixedly connected to the U-shaped rod, and a positioning piece hinged to the wheelchair frame, and the positioning piece is provided with three positioning grooves that cooperate with the handle.
[0010] Preferably, when the positioning groove in the middle of the three positioning grooves cooperates with the handle, the connecting column does not cooperate with the disc-shaped ratchet, and when the positioning grooves on both sides of the three positioning grooves cooperate with the handle, the connecting column cooperates with the disc-shaped ratchet.
[0011] Preferably, the connecting column is separated from the disc-shaped ratchet, and when the shifting rod pushes the spring to compress, the sliding rod remains connected to the U-shaped rod, thereby preventing the sliding rod from falling off the U-shaped rod.
[0012] Preferably, a slide plate is fixedly installed in the slide groove, which passes through the slider and is slidably connected to the slider; the sliding connection between the slide plate and the slider can ensure that the central axis of the connecting column and the transmission shaft is always coincident, preventing the connecting column from pressing on the transmission shaft.
[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:
[0014] 1. When using this wheelchair, the user only needs to drive the handle to match different positioning slots to switch the wheelchair between three modes: forward only, backward only, and free forward and backward movement. The operation is simple and easy to use.
[0015] 2. In the forward-only mode, the user only needs to face the slope and then manually turn the handwheel as in the existing technology to slowly climb the slope. There is no need to worry about the wheelchair rolling down the slope as soon as the handwheel is pushed forward. There is no need to continue to rush up the slope at a high initial speed. The user can climb the slope little by little, reducing the user's fatigue.
[0016] 3. When the slope is steep, the user is heavy, or the user's arm thrust is weak, this product can be switched to a backward-only mode. Taking advantage of the fact that most people have greater pulling force than pushing force, the user can climb the slope backward little by little. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a three-dimensional diagram of the utility model;
[0020] Figure 3 It is a partial cross-sectional view of the mounting bracket of the present utility model.
[0021] Description of reference numerals:
[0022] 1. Wheelchair frame; 2. Drive shaft; 3. Handwheel; 4. Seat cushion; 5. Connecting column; 6. Disc ratchet; 7. Ratchet; 8. Toggle assembly; 8a. Slide groove; 8b. Slider; 8c. Toggle lever; 9. Elastic assembly; 9a. U-shaped rod; 9b. Slide rod; 9c. Spring; 9d. Locking kit; 9d1. Handle; 9d2. Positioning plate; 9d3. Positioning groove; 10. Slide plate. DETAILED DESCRIPTION
[0023] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.
[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.
[0025] The utility model provides Figure 1-3The climbing wheelchair shown in the figure comprises a wheelchair frame 1, a transmission shaft 2 rotatably mounted on the wheelchair frame 1, and a handwheel 3 fixedly connected at both ends of the rotating shaft. A seat cushion is also installed on the wheelchair frame 1, and a connecting column 5 is axially slidably connected to the transmission shaft 2. Both sides of the connecting column 5 have disc-shaped ratchets 6 fixedly mounted on the transmission shaft 2, and the tooth surfaces of the two disc-shaped ratchets 6 are opposite and rotate in opposite directions. Both ends of the connecting column 5 have ratchets 7 that match the tooth surfaces of the two disc-shaped ratchets 6. A toggle assembly 8 for toggling the connecting column 5 to fit with the disc-shaped ratchet 6 is installed on the wheelchair frame 1, and the toggle assembly 8 includes a slide groove 8a opened on the wheelchair frame 1, a slider 8b slidably connected in the slide groove 8a, and a toggle rod 8c fixedly connected to one side of the slider 8b, and the slider 8b and the toggle rod 8c are both fixedly connected to the surface of the connecting column 5. The wheelchair frame 1 An elastic component 9 is also installed on the wheelchair frame 1 to apply elastic force to the toggle component 8 toward the disc-shaped ratchet 6. The elastic component 9 includes a U-shaped rod 9a that is fitted with the bottom surface of the wheelchair frame 1, a sliding rod 9b that passes through and is slidably connected to the U-shaped rod 9a, a spring 9c arranged on both sides of the sliding rod 9b and between the U-shaped rod 9a, and a locking kit 9d installed on one side of the U-shaped rod 9a. The sliding rod 9b passes through the toggle rod 8c and is fixedly connected to the toggle rod 8c, and the spring 9c is sleeved outside the sliding rod 9b. The locking kit 9d includes a handle 9d1 fixedly connected to the U-shaped rod 9a, and a positioning piece 9d2 hinged to the wheelchair frame 1. The positioning piece 9d2 is provided with three positioning grooves 9d3 that cooperate with the handle 9d1. A slide plate 10 is fixedly installed in the slide groove 8a. The slide plate 10 passes through the slider 8b and is slidably connected to the slider 8b.
[0026] The user sits on the seat and can manually drive the hand wheel 3 to move on a flat road as in the prior art;
[0027] When going uphill, the user flips the positioning piece 9d2 upwards to separate the positioning groove 9d3 in the middle from the grip 9d1, then moves the grip 9d1 to one side by holding the grip 9d1, and then flips the positioning piece 9d2 downwards to position the grip 9d1 in the positioning groove 9d3 next to it. When the grip 9d1 moves, it drives the U-shaped rod 9a, and the U-shaped rod 9a drives the lever 8c through the spring 9c. The lever 8c drives the slider 8b to slide in the slide groove 8a, and drives the connecting column 5 to cooperate with one of the disc ratchet wheels 6. At this time, when the handwheel 3 has a tendency to roll backward, it will first drive the transmission shaft 2, and the transmission shaft 2 drives the disc ratchet The wheel 6 and the disc-shaped ratchet 6 drive the connecting post 5, which has the tendency to drive the slider 8b to rotate. Since the slider 8b can only slide in the slide groove 8a, the connecting post 5 cannot rotate, and the handwheel 3 cannot move backward. However, when the handwheel 3 rolls forward, due to the cooperation between the ratchet teeth 7 on the connecting post 5 and the disc-shaped ratchet 6, the connecting post 5 will slide away from the disc-shaped ratchet 6. The connecting post 5 then drives the lever 8c to apply elastic force to the spring 9c, which forces the connecting post 5 toward the disc-shaped ratchet 6. Using this transmission relationship, the user can slowly go uphill without worrying about the wheelchair sliding down on the way uphill.
[0028] When it is necessary to go downhill, another positioning groove 9d3 on the positioning piece 9d2 is connected to the handle 9d1, and the connecting column 5 is matched with another disc-shaped ratchet 6. At this time, the wheelchair can only move backward and cannot move forward. The user only needs to turn the back of the wheelchair toward the uphill slope to pull the handwheel 3 and slowly climb the slope. Compared with pushing the handwheel 3 toward the slope with the front of the wheelchair, pulling the handwheel 3 backward can use the back muscles. When the user's thrust is insufficient, the pulling force is generally greater than the pushing force, which is more suitable for occasions with large slopes or users with heavy weights.
[0029] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are illustrative only. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should readily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientation changes, etc.).
Claims
1. A climbing wheelchair comprising a wheelchair frame (1), a transmission shaft (2) rotatably mounted on the wheelchair frame (1), and hand wheels (3) fixedly connected at both ends of the rotation shaft, wherein a seat cushion is further mounted on the wheelchair frame (1), and characterized in that: The transmission shaft (2) is axially slidably connected to a connecting column (5), and both sides of the connecting column (5) are provided with disc-shaped ratchets (6) fixedly mounted on the transmission shaft (2). The tooth surfaces of the two disc-shaped ratchets (6) are opposite and rotate in opposite directions. Both ends of the connecting column (5) are provided with ratchets (7) that match the tooth surfaces of the two disc-shaped ratchets (6). The wheelchair frame (1) is provided with a toggle assembly (8) for toggling the connecting column (5) into contact with the disc-shaped ratchets (6). The wheelchair frame (1) is also provided with an elastic assembly (9) for applying elastic force to the toggle assembly (8) toward the disc-shaped ratchets (6).
2. The hill-climbing wheelchair according to claim 1, characterized in that: The shifting assembly (8) comprises a sliding groove (8a) provided on the wheelchair frame (1), a slider (8b) slidably connected in the sliding groove (8a), and a shifting rod (8c) fixedly connected to one side of the slider (8b); the slider (8b) and the shifting rod (8c) are both fixedly connected to the surface of the connecting column (5).
3. The hill-climbing wheelchair according to claim 2, characterized in that: The elastic component (9) comprises a U-shaped rod (9a) fitted with the bottom surface of the wheelchair frame (1), a sliding rod (9b) passing through the U-shaped rod (9a) and slidably connected thereto, a spring (9c) arranged between both sides of the sliding rod (9b) and the U-shaped rod (9a), and a locking kit (9d) installed on one side of the U-shaped rod (9a); the sliding rod (9b) passes through the shifting rod (8c) and is fixedly connected thereto, and the spring (9c) is sleeved outside the sliding rod (9b).
4. The hill-climbing wheelchair according to claim 3, characterized in that: The locking kit (9d) comprises a handle (9d1) fixedly connected to the U-shaped rod (9a), and a positioning piece (9d2) hinged to the wheelchair frame (1); the positioning piece (9d2) is provided with three positioning grooves (9d3) that cooperate with the handle (9d1).
5. The hill-climbing wheelchair according to claim 4, characterized in that: When the positioning groove (9d3) in the middle of the three positioning grooves (9d3) cooperates with the handle (9d1), the connecting column (5) does not cooperate with the disc-shaped ratchet (6); when the positioning grooves (9d3) on both sides of the three positioning grooves (9d3) cooperate with the handle (9d1), the connecting column (5) cooperates with the disc-shaped ratchet (6).
6. The hill-climbing wheelchair according to claim 3, characterized in that: The connecting column (5) is separated from the disc-shaped ratchet (6), and when the shifting rod (8c) pushes the spring (9c) to compress, the sliding rod (9b) remains connected to the U-shaped rod (9a).
7. The hill-climbing wheelchair according to claim 2, characterized in that: A slide plate (10) is fixedly installed in the slide groove (8a), and the slide plate (10) passes through the slider (8b) and is slidably connected to the slider (8b).