Multi-stage linkage type electric wheelchair frame shock absorption mechanism

Abstract

The utility model provides a multistage linkage type electric wheelchair frame shock-proof mechanism which comprises an upper supporting frame and a lower supporting frame, a first linkage mechanism and a second linkage mechanism are arranged between the upper supporting frame and the lower supporting frame, the first linkage mechanism and the second linkage mechanism are connected through an adjusting beam, the lower end of the first linkage mechanism is connected with a first-stage shock-proof rod, and the lower end of the second linkage mechanism is connected with a second-stage shock-proof rod. The lower end of the second linkage mechanism is connected with two second-level shock-proof rods, and the first linkage mechanism and the second linkage mechanism are connected through an adjusting beam and then form a triangular supporting structure with the upper supporting frame. The shock-absorbing device has the advantages that a combined structure of the first linkage mechanism, the second linkage mechanism, the adjusting beam, the first-level shock-absorbing rod and the second-level shock-absorbing rod is adopted, a triangular supporting structure is formed, stability is enhanced, multi-level shock absorption and buffering are achieved through the multi-level shock-absorbing design, force is evenly transmitted through the linkage mechanisms, coordination actions are achieved, and the adjusting beam can meet different requirements. Seat vibration is effectively reduced, and riding comfort and practicability are improved.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to electric wheelchair technical field, concretely relates to a multistage linkage type electric wheelchair frame shock absorbing mechanism. BACKGROUND

[0002] In the electric wheelchair field, the core function of the frame shock absorbing mechanism is to reduce the direct transmission of vibration to the body of the occupant by buffering the impact of the road surface, especially for the sensitive groups such as the elderly, the disabled, etc., to reduce the damage risk of the lumbar vertebrae, the pelvis and other parts, the performance not only reflects in the vibration absorption efficiency, but also requires to keep the vehicle body stable in complex road conditions, avoid the lateral inclination or loss of control caused by local impact, and at the same time, the dynamic stability under different driving speeds needs to be considered.

[0003] The inventor found the following defects in the specific implementation process:

[0004] In the prior art, the traditional shock absorbing mechanism mostly adopts single-stage shock absorbing structure or simple linkage combination, when facing complex road surface, the vibration energy is difficult to be effectively absorbed, which easily leads to severe vibration of the seat, and the linkage of each shock absorbing component is insufficient, the stress distribution is uneven, and structural fatigue is easy to occur after long-term use, in addition, the traditional mechanism has poor adjustment flexibility, which is difficult to adapt to users of different weights and road conditions, and the application scene of the wheelchair is limited.

[0005] It should be noted that the above content belongs to the technical cognition of the inventor, and due to the vast and complex technical content in this field, the above content of the present application does not necessarily constitute the prior art. UTILITY MODEL CONTENT

[0006] 1. Technical problem to be solved by the utility model:

[0007] The utility model provides a multistage linkage type electric wheelchair frame shock absorbing mechanism to solve the technical problems existing in the above background technology.

[0008] 2. Technical scheme:

[0009] In order to achieve the above purpose, the utility model provides a technical scheme: a multistage linkage type electric wheelchair frame shock absorbing mechanism, comprising an upper support frame and a lower support frame, a linkage mechanism one and a linkage mechanism two are arranged between the upper support frame and the lower support frame, the linkage mechanism one and the linkage mechanism two are connected through an adjusting beam, a first-stage shock absorbing rod is connected to the lower end of the linkage mechanism one, two second-stage shock absorbing rods are connected to the lower end of the linkage mechanism two, and the linkage mechanism one and the linkage mechanism two are connected through the adjusting beam and form a triangular support structure with the upper support frame.

[0010] Further, the linkage mechanism one includes a linkage plate one, a plug rod is arranged in the linkage plate one through a hinge shaft, a connecting rod is arranged at the lower end of the plug rod, and one side of the linkage plate one is hinged to the adjusting beam.

[0011] Further, the upper and lower ends of the connecting rod are respectively hinged to the plug rod and the first-level shock-absorbing rod.

[0012] Further, the linkage mechanism two includes two linkage plates two, a balance rod one and a balance rod two are connected between the two linkage plates two, a supporting rod fixedly connected with the upper supporting frame is arranged on the balance rod one, and the adjusting beam is sleeved on the balance rod two and rotationally connected with the balance rod two.

[0013] Further, the lower ends of the two linkage plates two are hinged to the second-level shock-absorbing rod, and the balance rod one and the balance rod two are fixedly arranged through the linkage plates two.

[0014] Further, the lower ends of the first-level shock-absorbing rod and the second-level shock-absorbing rod are connected with the lower supporting frame and are arranged at the front and rear ends of the lower supporting frame.

[0015] Further, the two ends of the adjusting beam are rotationally connected with the linkage mechanism one and the linkage mechanism two, and the adjusting beam includes an adjusting rod, and a spring shock absorber is arranged in the middle of the adjusting rod.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical scheme has the following beneficial effects:

[0018] The utility model discloses a reasonable design, adopts linkage mechanism one, linkage mechanism two, adjusting beam, first-level shock-absorbing rod and second-level shock-absorbing rod's combined structure, forms triangle support structure and enhances stability, and multistage shock-absorbing design realizes vibration multilevel absorption buffering, and linkage mechanism makes even force transmission, and the coordinated action is realized, and adjusting beam can adapt to different demands, effectively reduces seat vibration, and improves ride comfort and practicality.

[0019] It should be noted that the structures not introduced in the utility model are the same as or can be realized by the prior art, and details are not repeated here. DRAWINGS

[0020] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0021] Fig. 2 It is another angle whole structure schematic diagram of the utility model.

[0022] Reference signs:

[0023] 1, upper support frame; 2, lower support frame; 3, linkage mechanism one; 301, linkage plate one; 302, insertion rod; 303, connecting rod; 4, linkage mechanism two; 401, linkage plate two; 402, balance bar one; 403, balance bar two; 404, support rod; 5, adjusting beam; 501, adjusting rod; 502, spring shock absorber; 6, primary shock absorbing rod; 7, secondary shock absorbing rod. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which several embodiments of the present application are given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description. Therefore, it cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing", "provided with", "provided in" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. EMBODIMENT

[0028] Referring to the drawings Figs. 1-2The utility model provides a kind of multistage linkage type electric wheelchair frame shock-absorbing mechanism, including upper support frame 1 and lower support frame 2, including upper support frame 1 and lower support frame 2 between being equipped with linkage mechanism one 3 and linkage mechanism two 4, linkage mechanism one 3 and linkage mechanism two 4 are connected between by adjusting beam 5, linkage mechanism one 3 lower end is connected with one level shock-absorbing rod 6, linkage mechanism two 4 lower end is connected with two two level shock-absorbing rod 7, linkage mechanism one 3 and linkage mechanism two 4 are connected after being linked by adjusting beam 5, and upper support frame 1 is triangular support structure.

[0029] Upper support frame 1 and lower support frame 2 constitute the upper and lower basic frame of shock-absorbing mechanism. Between upper support frame 1 and lower support frame 2, linkage mechanism one 3 and linkage mechanism two 4 are symmetrically distributed, and are transversely connected by adjusting beam 5. One side of linkage mechanism one 3 is connected to one end of adjusting beam 5 in a hinged manner, so that linkage mechanism one 3 can rotate around the hinge point by a certain angle. In linkage mechanism two 4, the outer side end of balance bar two 403 is sleeved with the other end of adjusting beam 5, and adjusting beam 5 can rotate on balance bar two 403, thereby realizing the up-down swinging action of adjusting beam 5. After linkage mechanism one 3 and linkage mechanism two 4 are connected by adjusting beam 5, a stable triangular support structure is formed with upper support frame 1, which can effectively disperse and withstand forces from all directions and ensure the structural strength of the entire shock-absorbing mechanism during operation.

[0030] Linkage mechanism one 3 includes linkage plate one 301, which is provided with a plug rod 302 inside through a hinge shaft. The lower end of plug rod 302 is provided with a connecting rod 303. One side of linkage plate one 301 is hinged to adjusting beam 5. The upper and lower ends of connecting rod 303 are respectively hinged to plug rod 302 and one level shock-absorbing rod 6. Upper support frame 1 forms stable support with linkage mechanism one 3 through plug rod 302. One side edge of linkage plate one 301 is provided with a hinge hole, which is hinged to the end of adjusting beam 5 through a pin shaft, realizing the movable connection of linkage mechanism one 3 and adjusting beam 5. Connecting rod 303 is hinged to plug rod 302 and one level shock-absorbing rod 6 through a pin shaft, forming a movable connection structure at both ends. Linkage mechanism one 3 plays a role in force transmission and conversion during shock absorption. When the electric wheelchair travels on uneven road surface, the lower support frame 2 receives the impact force from the ground, which is transmitted upward through the one level shock-absorbing rod 6, converting the vertical impact force into relative rotation and displacement between linkage mechanism one 3 and adjusting beam 5, dispersing the impact force and avoiding the concentrated effect of single direction force. At the same time, it provides flexible movement space for one level shock-absorbing rod 6, so that it can better play the shock-absorbing effect.

[0031] The linkage mechanism two 4 comprises two linkage plates two 401, a balance bar one 402 and a balance bar two 403 are connected between the two linkage plates two 401, the balance bar one 402 is provided with a support bar 404 fixedly connected with the upper support frame 1, one end of the adjusting beam 5 is sleeved on the balance bar two 403 and is rotationally connected with the balance bar two 403, the lower ends of the two linkage plates two 401 are hingedly connected with the two-stage shock-absorbing bars 7, the balance bar one 402 and the balance bar two 403 penetrate through the linkage plates two 401 and are fixed, the balance bar one 402 and the balance bar two 403 are cylindrical rods, the two ends of the balance bar one 402 and the balance bar two 403 penetrate through the corresponding through holes in the two linkage plates two 401 respectively and are fixed by bolts, so that the two linkage plates two 401 maintain a relative parallel and stable positional relationship, the balance bar one 402 is fixedly connected with the support bar 404, the upper end of the support bar 404 is fixed with the upper support frame 1 by welding, so that the linkage mechanism two 4 is rigidly connected with the upper support frame 1 to provide a stable support point for the whole mechanism, one end of the adjusting beam 5 is provided with a sleeve, the sleeve is sleeved on the balance bar two 403, and the sleeve and the balance bar two 403 are rotationally connected by a bearing or a shaft sleeve, so that the adjusting beam 5 can rotate relative to the balance bar two 403, the lower ends of the two linkage plates two 401 are hingedly connected with the upper ends of the two-stage shock-absorbing bars 7, so that the linkage mechanism two 4 is movably connected with the two-stage shock-absorbing bars 7; the main function of the linkage mechanism two 4 is to realize the cooperative work and balanced transmission of force of the two two-stage shock-absorbing bars 7, when the wheelchair encounters bumps, the impact force at the rear end of the lower support frame 2 is transmitted to the linkage plates two 401 through the two two-stage shock-absorbing bars 7, since the two linkage plates two 401 are connected into a whole through the balance bar one 402 and the balance bar two 403, the impact force can be evenly distributed between the two linkage plates two 401, so that a single shock-absorbing bar does not bear excessive load, the fixed connection of the support bar 404 and the upper support frame 1 provides a stable fulcrum for the linkage mechanism two 4, so that the linkage plates two 401 can rotate around the support bar 404 when subjected to impact force, linkage is realized through the adjusting beam 5 and the linkage mechanism one 3, the overall rigidity of the shock-absorbing mechanism is enhanced, and the two two-stage shock-absorbing bars 7 can be made to act cooperatively according to different bump conditions of the road surface, so that the uniformity and stability of the shock-absorbing effect are improved.

[0032] The lower ends of the one-stage shock-absorbing bars 6 and the two-stage shock-absorbing bars 7 are connected with the lower support frame 2 and are distributed at the front and rear ends of the lower support frame 2, the one-stage shock-absorbing bars 6 and the two-stage shock-absorbing bars 7 are telescopic shock-absorbing structures, the one-stage shock-absorbing bars 6 are located at the front end of the lower support frame 2 and mainly bear the impact force generated when the front wheels encounter bumps, the two two-stage shock-absorbing bars 7 are symmetrically distributed at the rear end of the lower support frame 2 and jointly bear the impact force in the rear wheel area, the shock-absorbing bars are provided with springs, dampers and other elements inside, can absorb and consume vibration energy through compression of the springs and damping action of the dampers when subjected to impact force, reduce the amplitude of vibration transmission to the upper support frame 1 and the wheelchair seat, and provide a comfortable riding experience for the occupant.

[0033] The adjusting beam 5 is rotatably connected with the linkage mechanism one 3 and the linkage mechanism two 4 at both ends, respectively, and comprises an adjusting rod 501, and a spring shock absorber 502 is connected in the middle of the adjusting rod 501, the adjusting rod 501 can adopt a threaded connection or a telescopic structure, allowing the user to adjust the length of the adjusting beam 5 according to actual needs, so as to adjust the spacing between the linkage mechanism one 3 and the linkage mechanism two 4, so as to adapt to wheelchair frames of different sizes or different shock absorption needs, a helical spring is arranged in the spring shock absorber 502, and both ends are connected with both ends of the adjusting rod 501, in the shock absorption process, when the linkage mechanism one 3 and the linkage mechanism two 4 move relatively, the adjusting beam 5 is stretched or compressed, the spring of the spring shock absorber 502 is deformed, and the energy is absorbed and released, further enhancing the buffering effect of the whole shock absorption mechanism, and at the same time, the spring shock absorber 502 can also adjust the acting force between the linkage mechanism one 3 and the linkage mechanism two 4 to a certain extent, so that the linkage of the two is more coordinated.

[0034] In summary, the multi-stage linkage type electric wheelchair frame shock absorption mechanism realizes multi-level absorption and buffering of ground vibration through the triangular support structure formed by the linkage mechanism one 3, the linkage mechanism two 4 and the adjusting beam 5, and the multi-stage shock absorption design of the first-stage shock absorbing rod 6, the second-stage shock absorbing rod 7 and the spring shock absorber 502 on the adjusting beam 5;

[0035] In the process of wheelchair driving, whether the front wheels or the rear wheels encounter bumps, the vibration will be transmitted to the linkage mechanism through the corresponding shock absorbing rod, and then the vibration energy will be gradually consumed through the linkage of the linkage mechanism and the adjusting beam 5 and the action of the spring shock absorber 502, so as to effectively reduce the vibration amplitude of the seat and improve the comfort and stability of riding, and at the same time, the flexible connection mode and the adjustable structure design between the parts make the shock absorption mechanism can adapt to different use scenes and user needs, and have strong universality and practicality.

[0036] The above-described embodiments only express certain embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the present application; it should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application; therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A multi-stage linkage electric wheelchair frame shock absorption mechanism, comprising an upper support frame (1) and a lower support frame (2), characterized in that: The upper support frame (1) and the lower support frame (2) are provided with a linkage mechanism 1 (3) and a linkage mechanism 2 (4). The linkage mechanism 1 (3) and the linkage mechanism 2 (4) are connected by an adjusting beam (5). The lower end of the linkage mechanism 1 (3) is connected to a primary shock absorber rod (6), and the lower end of the linkage mechanism 2 (4) is connected to two secondary shock absorber rods (7). The linkage mechanism 1 (3) and the linkage mechanism 2 (4) are connected by the adjusting beam (5) and form a triangular support structure with the upper support frame (1).

2. The multi-stage linkage electric wheelchair frame shock absorption mechanism according to claim 1, characterized in that: The linkage mechanism (3) includes a linkage plate (301), a plug rod (302) is provided in the linkage plate (301) through a hinge shaft, a connecting rod (303) is provided at the lower end of the plug rod (302), and one side of the linkage plate (301) is hinged to the adjusting beam (5).

3. The multi-stage linkage electric wheelchair frame shock absorption mechanism according to claim 2, characterized in that: The upper and lower ends of the connecting rod (303) are respectively hinged to the insert rod (302) and the first-level shock absorber rod (6).

4. The multi-stage linkage electric wheelchair frame shock absorption mechanism according to claim 1, characterized in that: The second linkage mechanism (4) includes two second linkage plates (401), and a first balance bar (402) and a second balance bar (403) are connected between the two second linkage plates (401). The first balance bar (402) is provided with a support rod (404) that is fixedly connected to the upper support frame (1). One end of the adjusting beam (5) is sleeved on the second balance bar (403) and rotatably connected to it.

5. The multi-stage linkage electric wheelchair frame shock absorption mechanism according to claim 4, characterized in that: The lower ends of the two linkage plates (401) are hinged to the secondary shock absorber (7), and the two ends of the balance bar (402) and the balance bar (403) pass through the linkage plates (401) and are fixed to each other.

6. The multi-stage linkage electric wheelchair frame shock absorption mechanism according to claim 1, characterized in that: The lower ends of the primary shock absorber (6) and the secondary shock absorber (7) are connected to the lower support frame (2) and are distributed at the front and rear ends of the lower support frame (2).

7. The multi-stage linkage electric wheelchair frame shock absorption mechanism according to claim 1, characterized in that: The two ends of the adjusting beam (5) are rotatably connected to the first linkage mechanism (3) and the second linkage mechanism (4) respectively. The adjusting beam (5) includes an adjusting rod (501), and a spring shock absorber (502) is connected in the middle of the adjusting rod (501).

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