Damping mechanism for wheelchair and wheelchair

Abstract

A seat and a wheel axle are connected through the damping mechanism, the damping mechanism comprises a sleeve, damping pieces, blocking pieces and a pull rod, the sleeve is installed on a supporting leg of the seat in a sliding mode, the two blocking pieces are symmetrically installed on the supporting leg and located outside the two ends of the sleeve, and the pull rod is connected with the damping pieces. The pull rod is slidably installed on the two blocking pieces, the sleeve is connected with the pull rod, the two damping pieces are arranged at the two ends of the pull rod in a sleeving mode respectively and pressed tightly through nuts, the nuts are connected with the outer end of the pull rod through threaded structures, and the wheel shaft is rotatably installed on the sleeve. According to the damping mechanism and the wheelchair, the upper damping piece and the lower damping piece (which can be springs) are arranged on the supporting legs of the seat to relieve and eliminate bumping borne by the wheel axle, if the elastic limit of the springs is allowed, bumping of a user on the wheelchair basically cannot cause the phenomenon that the user touches the bottom, and the wheelchair achieves the good damping effect and use experience. And meanwhile, the damping part of the damping mechanism of the wheelchair is externally arranged, so that replacement and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to a shock absorbing mechanism for a wheelchair and the wheelchair. Background Art

[0002] A wheelchair is a chair with wheels that can help replace walking. It mainly includes two categories: push wheelchairs and electric wheelchairs. Wheelchairs are important means of transportation for the injured, sick, and disabled to recover at home, for transportation, for medical treatment, and for activities outside. Wheelchairs not only meet the needs of the physically disabled and those with limited mobility, but more importantly, they facilitate family members to move and take care of patients, and enable patients to exercise and participate in social activities with the help of wheelchairs.

[0003] General push wheelchairs are commonly used in hospitals and public places, or for temporary emergency use, because of their simple structure, light weight, easy mobility, and low cost. However, general push wheelchairs often ignore the user experience due to their simple structure, especially in terms of shock absorption. A single shock-absorbing spring or shock absorber or other shock-absorbing accessories are usually used near the single-side wheel axle. Because of the setting of a single shock absorber, there will be a bottoming phenomenon during shock absorption, and it is difficult to achieve the ups and downs shock absorption effect, resulting in greater bumps when the user is riding. In addition, the shock-absorbing springs or shock absorbers of some wheelchairs are generally built-in, which makes later replacement and maintenance more difficult. Utility Model Content

[0004] The utility model aims to provide a shock absorbing mechanism for a wheelchair and a wheelchair, so as to solve the problem that the existing wheelchair is difficult to achieve the shock absorbing effect of up and down fluctuations in the shock absorbing design, resulting in greater bumps when the user is riding, and the shock absorbing springs or shock absorbers of some wheelchairs are generally built-in, which makes it difficult to replace and repair them later.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A shock absorbing mechanism for a wheelchair comprises a seat and a wheel axle, wherein the seat and the wheel axle are connected via the shock absorbing mechanism, the shock absorbing mechanism comprising a sleeve, a shock absorbing member, a blocking member and a pull rod, the sleeve being slidably mounted on a leg of the seat, two blocking members being symmetrically mounted on the leg and located outside the two ends of the sleeve, the pull rod being slidably mounted on the two blocking members, the sleeve being connected to the pull rod, the two shock absorbing members being respectively sleeved on the two ends of the pull rod and being tightened by a nut, the nut being connected to the outer end of the pull rod via a threaded structure, and the wheel axle being rotatably mounted on the sleeve.

[0007] A further technical solution is that the blocking member is a ring baffle.

[0008] A further technical solution is that a limiting structure is provided between the sleeve and the supporting leg.

[0009] A further technical solution is that the limiting structure is a sliding-fitting protrusion and a groove.

[0010] A further technical solution is that the cross sections of the sleeve and the legs are both square.

[0011] A further technical solution is that a damper is hinged between the sleeve and the seat.

[0012] A further technical solution is: the wheelchair includes a shock absorbing mechanism.

[0013] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0014] The utility model proposes a shock absorbing mechanism for a wheelchair and a wheelchair, wherein shock absorbing members (which may be springs) arranged up and down and sleeves located between the shock absorbing members and sliding back and forth on the legs are arranged on the seat legs of the wheelchair, the bumps on the wheel axle are alleviated and absorbed by the shock absorbing members, and the influence on the user is reduced to a minimum, and if the elastic limit of the spring allows, the bumps on the wheelchair by the user will basically not cause bottoming, so that the wheelchair can achieve good shock absorption effect and user experience.

[0015] At the same time, the shock absorbing mechanism of the wheelchair also arranges the shock absorbing parts externally, which is convenient for replacement and maintenance when the shock absorbing parts are mostly spring damaged or need to be replaced due to the weight of the user, and is convenient for replacement according to the actual situation such as the weight of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a shock absorbing mechanism for a wheelchair and the wheelchair.

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the shock absorbing mechanism.

[0018] Figure 3 For this utility model Figure 2 Structural diagram from another perspective

[0019] Figure 4 It is a structural schematic diagram of the limiting structure of the utility model.

[0020] Figure numerals: 1, seat; 2, axle; 3, shock absorbing mechanism; 4, sleeve; 5, shock absorbing member; 6, blocking member; 7, pull rod; 8, support leg; 9, nut; 10, damper; 11, limiting structure. DETAILED DESCRIPTION

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

[0022] Therefore, 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 invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1:

[0028] In this embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a shock absorbing mechanism for a wheelchair includes a seat 1 and an axle 2, the seat 1 and the axle 2 are connected by a shock absorbing mechanism 3, the shock absorbing mechanism 3 includes a sleeve 4, a shock absorbing member 5, a blocking member 6 and a pull rod 7, the sleeve 4 is slidably mounted on the leg 8 of the seat 1, two blocking members 6 are symmetrically mounted on the leg 8 and are located outside the two ends of the sleeve 4, the pull rod 7 is slidably mounted on the two blocking members 6, the sleeve 4 is connected to the pull rod 7, the two shock absorbing members 5 are respectively sleeved on the two ends of the pull rod 7 and are compressed by nuts 9, the nuts 9 are connected to the outer end of the pull rod 7 by a threaded structure, and the axle 2 is rotatably mounted on the sleeve 4. The blocking member 6 is a ring baffle. A damper 10 is hinged between the sleeve 4 and the seat 1.

[0029] The working process of the utility model is as follows: when the wheel axle 2 is subjected to gravity and bumps, the wheel axle 2 transmits force to the shock absorbing mechanism 3. Specifically, the large wheel on the wheel axle 2 is affected by the bumps on the road surface, and the sleeve 4 and the pull rod 7 installed thereon are shock-absorbing through the upper and lower shock absorbing members 5 (springs). If the elastic limit of the spring allows, the user's bumps on the wheelchair will basically not cause bottoming out, so that the wheelchair can achieve a good shock-absorbing effect and user experience. At the same time, the shock absorbing mechanism of the wheelchair also arranges the shock absorbing member externally. When the shock absorbing member is mostly spring-damaged or needs to be replaced due to the weight of the user, it is easy to replace and repair, and it is convenient to replace according to the actual situation such as the weight of the user.

[0030] By using the damper 10 (spring damper or hydraulic damper, etc.), on the one hand, the damper 10 can further limit the axial rotation of the sleeve 4 while allowing the sleeve 4 to move up and down; on the other hand, when the sleeve 4 moves back and forth in the vertical direction of the support leg 8, the damper 10 will be stretched and compressed, and the damping properties of the damper 10 itself can slow down the rapid movement of the sleeve 4, further improving the shock absorption effect.

[0031] It is worth noting that: the limiting structure 11 ( Figure 4 As shown), it is convenient for installation and limits the axial rotation of the sleeve 4. The limiting structure 11 (including but not limited to) is a sliding fit of a bump and a groove. The bump and the groove can be correspondingly arranged on the sleeve 4 and the leg 8.

[0032] Preferably, the cross-sections of the sleeve 4 and the legs 8 are both square.

[0033] This square fit is also a type of limiting structure 11, but is simpler and easier to assemble than the arrangement of protrusions and grooves.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shock absorbing mechanism for a wheelchair, characterized in that: The invention comprises a seat (1) and a wheel axle (2), wherein the seat (1) and the wheel axle (2) are connected via a shock absorbing mechanism (3), wherein the shock absorbing mechanism (3) comprises a sleeve (4), a shock absorbing member (5), a blocking member (6) and a pull rod (7), wherein the sleeve (4) is slidably mounted on a leg (8) of the seat (1), wherein two blocking members (6) are symmetrically mounted on the leg (8) and are located outside the two ends of the sleeve (4), wherein the pull rod (7) is slidably mounted on the two blocking members (6), wherein the sleeve (4) is connected to the pull rod (7), wherein the two shock absorbing members (5) are respectively sleeved on the two ends of the pull rod (7) and are compressed by a nut (9), wherein the nut (9) is connected to the outer end of the pull rod (7) via a threaded structure, and wherein the wheel axle (2) is rotatably mounted on the sleeve (4).

2. A shock absorbing mechanism for a wheelchair according to claim 1, characterized in that: The blocking member (6) is a ring baffle.

3. A shock absorbing mechanism for a wheelchair according to claim 2, characterized in that: A limiting structure (11) is provided between the sleeve (4) and the supporting leg (8).

4. A shock absorbing mechanism for a wheelchair according to claim 3, characterized in that: The limiting structure (11) is a slidably matched protrusion and groove.

5. The shock absorbing mechanism for a wheelchair according to claim 2, characterized in that: The sleeve (4) and the supporting leg (8) both have square cross-sections.

6. The shock absorbing mechanism for a wheelchair according to claim 1, characterized in that: A damper (10) is hingedly connected between the sleeve (4) and the seat (1).

7. A wheelchair, characterized in that: The wheelchair comprises the shock absorbing mechanism according to any one of claims 1-6.

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