Modular combined electric wheelchair suspension chassis

Abstract

The utility model provides a modularization combined formula electric wheelchair shock absorption chassis, including two main beam frames, two main beam frames front and rear ends are connected with front cantilever bar and rear cantilear bar, be equipped with connecting rod one and connecting rod two between two front cantilever bars, be equipped with connecting rod three and connecting rod four between two rear cantilever bars, and the front end of front cantilever bar is equipped with front wheel mounting seat, and two front wheel positioning seat are connected with left shock absorber and right shock absorber respectively, and still be equipped with two air spring rods between connecting rod two and connecting rod four. The utility model has the advantages that: combined formula electric wheelchair shock absorption chassis adopts regional shock absorption design, and left and right shock absorbers work independently, greatly improve driving comfort and stability, reduce the bump feeling, modular structure is convenient for production, assembly and maintenance, and can also be adjusted as needed, adapt to different use scenes, effectively enhance the practicality and adaptability of electric wheelchair, bring better experience for the user.

Description

Technical Field

[0001] This utility model mainly relates to the field of electric wheelchair technology, specifically to a modular combined electric wheelchair shock-absorbing chassis. Background Technology

[0002] As the core load-bearing and drive component, the electric wheelchair chassis's technological development closely aligns with users' needs for convenient mobility. Early chassis only met basic mobility functions; however, with the aging population and increasing rehabilitation needs, designs such as shock absorption, folding, and load-bearing reinforcement have gradually been integrated. Modern chassis must balance structural strength and lightweight design, adapt to various indoor and outdoor scenarios, and ensure a stable center of gravity during movement through a rational layout. This is a key component determining the safety and comfort of the wheelchair.

[0003] Most current electric wheelchair chassis have significant limitations: the shock absorption system is mostly integrated, and bumps on one side are easily transmitted to the whole, resulting in poor comfort on complex roads; the folding structure design is redundant, and the volume is still large when folded, which is not portable enough; the structure is welded or fixed, so local damage requires whole-body repair, which is not only costly, but also difficult to personalize according to the user's body shape and usage scenario, thus limiting adaptability.

[0004] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model: This utility model provides a modular combined electric wheelchair shock-absorbing chassis to solve the technical problems existing in the background art.

[0006] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this utility model is as follows: a modular combined electric wheelchair shock-absorbing chassis, comprising two main beams, with front and rear cantilever rods respectively connected to the front and rear ends of the two main beams, a connecting rod one and a connecting rod two between the two front cantilever rods, and a connecting rod three and a connecting rod four between the two rear cantilever rods, each front cantilever rod having a front wheel mounting seat at its front end, a left shock absorber and a right shock absorber respectively connected to the two front wheel mounting seats, and two gas spring rods between the connecting rod two and the connecting rod four.

[0007] Furthermore, both the front and rear cantilever arms are provided with positioning bosses at their lower ends, and the positioning bosses are respectively provided at both ends of the connecting rod one, the connecting rod two, the connecting rod three, and the connecting rod four.

[0008] Furthermore, the front cantilever rod is fixedly connected to the main beam frame by positioning bolts, and the front end of the front cantilever rod is provided with a positioning plate corresponding to the front wheel mounting seat.

[0009] Furthermore, the rear cantilever rod is movably connected to the main beam frame via a positioning pin, and the rear cantilever rod is provided with a gradually expanding adjustment groove that matches the positioning pin, and the rear end of the gradually expanding adjustment groove is also provided with a shaft hole.

[0010] Furthermore, the front wheel mounting bracket includes a positioning sleeve, and the lower end of the positioning sleeve is provided with a front fork assembly threadedly connected thereto. The two front fork assemblies are respectively hinged to the left shock absorber and the right shock absorber.

[0011] Furthermore, the upper ends of both connecting rod 2 and connecting rod 4 are provided with hinge seats 1 corresponding to the gas spring rod, and the lower ends of both connecting rod 1 and connecting rod 2 are provided with hinge seats 2 corresponding to the left shock absorber and the right shock absorber.

[0012] Furthermore, the left shock absorber is hinged to the connecting rod 2 via the hinge seat 2, and the right shock absorber is hinged to the connecting rod 1 via the hinge seat 2.

[0013] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: The modular electric wheelchair's shock-absorbing chassis features a regional shock absorption design, with the left and right shock absorbers working independently, significantly improving driving comfort and stability and reducing the feeling of bumps. The modular structure facilitates production, assembly, and maintenance, and can be flexibly adjusted as needed to adapt to different usage scenarios, effectively enhancing the practicality and adaptability of electric wheelchairs and bringing a better experience to users.

[0014] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle; Figure 3 This is a partial structural schematic diagram of the present invention.

[0016] Figure label: 1. Main beam frame; 2. Front cantilever rod; 3. Rear cantilever rod; 4. Link 1; 5. Link 2; 6. Link 3; 7. Link 4; 8. Front wheel mounting bracket; 801. Positioning sleeve; 802. Front fork assembly; 9. Left shock absorber; 10. Right shock absorber; 11. Gas spring rod; 12. Positioning boss; 13. Positioning plate; 14. Gradually expanding adjustment groove; 15. Shaft hole; 16. Hinge seat 1; 17. Hinge seat 2. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] See attached document Figure 1-3A modular combined electric wheelchair shock-absorbing chassis includes two main beams 1. The front and rear ends of the two main beams 1 are respectively connected to a front cantilever rod 2 and a rear cantilever rod 3. A first link 4 and a second link 5 are provided between the two front cantilever rods 2. A third link 6 and a fourth link 7 are provided between the two rear cantilever rods 3. A front wheel mounting seat 8 is provided at the front end of each front cantilever rod 2. A left shock absorber 9 and a right shock absorber 10 are respectively connected to the two front wheel mounting seats 8. Two gas spring rods 11 are also provided between the second link 5 and the fourth link 7.

[0022] In this embodiment, the shock-absorbing chassis consists of two main beam frames 1. The front and rear ends of the main beam frame 1 are connected to the front cantilever rod 2 and the rear cantilever rod 3, respectively. Both cantilever rods are arc-shaped structures, forming a stable frame structure with the main beam frame 1, providing support for the wheelchair's movement and shock absorption.

[0023] The front cantilever 2 is fixedly connected to the main beam frame 1 by positioning bolts to ensure the stability of the connection and to cope with various forces generated by the front wheels during driving. The front end of the front cantilever 2 is provided with a positioning plate 13 corresponding to the front wheel mounting seat 8. The positioning plate 13 and the front wheel mounting seat 8 are precisely matched to ensure the accuracy of the front wheel installation position.

[0024] The rear cantilever arm 3 is connected to the main beam frame 1 through a positioning pin with a self-locking function. The rear cantilever arm 3 has a gradually expanding adjustment groove 14 that matches the positioning pin. The rear cantilever arm 3 can be inserted into the main beam frame 1 through the gradually expanding adjustment groove 14 to fold up, thereby realizing the folding function of the electric wheelchair. During the folding process, the positioning pin needs to be unlocked first. The two gas spring rods 11 connected between the second link 5 and the fourth link 7 will retract accordingly to assist in completing the folding action and reduce the operating force. At the same time, the shaft hole 15 on the rear cantilever arm 3 is used to install the rear wheel assembly, providing a support point for the wheelchair's drive and steering.

[0025] The linkage system is a key component for achieving chassis structural stability and functional linkage. It includes linkage 1 (4), linkage 2 (5), linkage 3 (6), and linkage 4 (7). All linkages are bent components with both ends pointing upwards. The bent parts are connected to the positioning bosses 12 at the lower ends of the front suspension arm 2 and the rear suspension arm 3. The connection method is to fix them with locking screws to ensure the connection strength between the linkage and the suspension arm and to prevent loosening during driving or shock absorption. Link 1 (4) and linkage 2 (5) are assembled between the two front suspension arms 2, and linkage 3 (6) and linkage 4 (7) are assembled between the two rear suspension arms 3. Through the connection of the linkages, the left and right suspension arms are formed into an integrated and coordinated structure.

[0026] The front wheel mounting bracket 8 consists of a positioning sleeve 801 and a front fork assembly 802. The lower end of the positioning sleeve 801 is threaded to the front fork assembly 802, facilitating the installation and replacement of the front fork assembly 802. Both front fork assemblies 802 extend to both sides, providing space for the inclined installation of the shock absorbers. The front fork assembly 802 is connected to the shock absorbers. The two ends of the left shock absorber 9 and the right shock absorber 10 are inclined upwards and downwards. The upward end is hinged to the second hinge seat 17 on the connecting rod, and the downward end is hinged to the front fork assembly 802. Specifically, the left shock absorber 9 is hinged to the second connecting rod 5 through the second hinge seat 17, and the right shock absorber 10 is hinged to the first connecting rod 4 through the second hinge seat 17.

[0027] The hinge seat design on the connecting rod further ensures the flexibility of the shock absorption system: the upper ends of connecting rod 2 5 and connecting rod 4 7 are both equipped with hinge seat 16 corresponding to the gas spring rod 11, which is used for the installation and fixation of the gas spring rod 11; the lower ends of connecting rod 1 4 and connecting rod 2 5 are both equipped with hinge seat 2 17 corresponding to the left shock absorber 9 and the right shock absorber 10, which provides a connection fulcrum for the shock absorbers.

[0028] In summary, this technical solution achieves precise shock absorption by connecting the left and right shock absorbers of the front fork assembly 802 to two connecting rods respectively. When the wheelchair is traveling on an uneven road surface and the left side experiences vibration, the left shock absorber 9 will buffer and absorb the vibration through linkage with connecting rod 2 5. Since the right shock absorber 10 is connected to connecting rod 1 4 and is relatively independent from the left shock absorption system, the vibration on the left side will not affect the right side at the same time. Similarly, when the right side experiences vibration, it will not interfere with the left side. Thus, the combined structure achieves regional shock absorption, improving the comfort and stability of the wheelchair during travel.

[0029] This modular design not only facilitates the production, assembly, maintenance, and replacement of various components, but also allows for flexible adjustments to meet different usage needs, further enhancing the practicality and adaptability of electric wheelchairs.

[0030] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A modular, combined electric wheelchair shock-absorbing chassis, characterized in that: It includes two main beam frames (1), with front cantilever rods (2) and rear cantilever rods (3) connected to the front and rear ends of the two main beam frames (1) respectively. A connecting rod 1 (4) and a connecting rod 2 (5) are provided between the two front cantilever rods (2), and a connecting rod 3 (6) and a connecting rod 4 (7) are provided between the two rear cantilever rods (3). A front wheel mounting seat (8) is provided at the front end of each front cantilever rod (2), and a left shock absorber (9) and a right shock absorber (10) are connected to the two front wheel mounting seats (8) respectively. Two gas spring rods (11) are also provided between the connecting rod 2 (5) and the connecting rod 4 (7).

2. The modular combined electric wheelchair shock-absorbing chassis according to claim 1, characterized in that: The lower ends of the front cantilever (2) and the rear cantilever (3) are provided with positioning bosses (12), which are respectively provided at both ends of the connecting rod one (4), the connecting rod two (5), the connecting rod three (6) and the connecting rod four (7).

3. The modular combined electric wheelchair shock-absorbing chassis according to claim 1, characterized in that: The front cantilever rod (2) is fixedly connected to the main beam frame (1) by positioning bolts, and the front end of the front cantilever rod (2) is provided with a positioning plate (13) corresponding to the front wheel mounting seat (8).

4. The modular combined electric wheelchair shock-absorbing chassis according to claim 1, characterized in that: The rear cantilever rod (3) is movably connected to the main beam frame (1) by a positioning pin, and the rear cantilever rod (3) is provided with a gradually expanding adjustment groove (14) that matches the positioning pin. The rear end of the gradually expanding adjustment groove (14) is also provided with a shaft hole (15).

5. The modular combined electric wheelchair shock-absorbing chassis according to claim 1, characterized in that: The front wheel mounting bracket (8) includes a positioning sleeve (801), and the lower end of the positioning sleeve (801) is provided with a front fork assembly (802) threadedly connected thereto. The two front fork assemblies (802) are respectively hinged to the left shock absorber (9) and the right shock absorber (10).

6. The modular combined electric wheelchair shock-absorbing chassis according to claim 1, characterized in that: The upper ends of the second link (5) and the fourth link (7) are provided with a hinge seat (16) corresponding to the gas spring rod (11), and the lower ends of the first link (4) and the second link (5) are provided with a hinge seat (17) corresponding to the left shock absorber (9) and the right shock absorber (10).

7. A modular combined electric wheelchair shock-absorbing chassis according to claim 6, characterized in that: The left shock absorber (9) is hinged to the connecting rod (5) via the second hinge seat (17), and the right shock absorber (10) is hinged to the connecting rod (4) via the second hinge seat (17).

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