A flexible shock absorbing connection device for an x-folded vehicle frame

Abstract

The utility model provides a kind of elastic shock absorption connecting device of X-type folding frame, including first frame body and second frame body, first frame body and second frame body are equipped with composite shock absorption component, lifting adjustment component and light weight connecting seat, composite shock absorption component includes two groups of mirror image setting cross air spring unit and transverse connecting rod linkage unit, lifting adjustment component includes double-nut screw rod unit and driving motor, light weight connecting seat includes first connecting seat and second connecting seat, both sides of first connecting seat and second connecting seat are equipped with lug plate, cross air spring unit and transverse connecting rod linkage unit are mutually spaced along four sides of first connecting seat, second connecting seat setting.The utility model has the beneficial effects that: by composite shock absorption and high-precision adjustment design, significantly improve ride comfort and adaptability, cross air spring unit and transverse connecting rod form three-dimensional shock absorption system, effectively absorb multidirectional impact, reduce vertical vibration attenuation rate, lateral attenuation rate.

Description

Technical Field

[0001] This utility model mainly relates to the field of electric wheelchair technology, specifically to an elastic shock-absorbing connection device for an X-shaped folding frame. Background Technology

[0002] As an important mobility tool for the elderly and people with mobility impairments, the comfort, adjustability, and portability of the frame structure are core design indicators for electric wheelchairs. Existing X-type folding frames generally use single-spring or hydraulic shock absorption structures, which can only cope with vertical vibrations and are insufficient in attenuating the tilting or lateral impact of the road surface, resulting in a bumpy feeling and the risk of tipping over during riding. Traditional screw adjustment mechanisms have problems such as large nut clearance and low adjustment precision, and lack an automatic compensation mechanism. They are prone to loosening under long-term vibration loads, making it difficult to meet the precise adaptation needs of users of different heights. In addition, although steel connecting seats are strong, they are heavy, while aluminum alloy components are prone to fatigue fracture due to stress concentration at the intersection. Existing solutions are difficult to balance lightweight and structural strength.

[0003] 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

[0004] 1. The technical problem to be solved by the utility model:

[0005] This utility model provides an elastic shock-absorbing connection device for an X-shaped folding frame to solve the technical problems existing in the background art.

[0006] 2. Technical Solution:

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows: an elastic shock-absorbing connection device for an X-type folding frame, comprising a first frame body and a second frame body, wherein the first frame body and the second frame body are provided with a composite shock-absorbing component, a lifting adjustment component and a lightweight connecting seat, wherein the composite shock-absorbing component includes two sets of mirror-arranged cross gas spring units and a lateral linkage unit, wherein the lifting adjustment component includes a double nut screw unit and a drive motor, wherein the lightweight connecting seat includes a first connecting seat and a second connecting seat, wherein both sides of the first connecting seat and the second connecting seat are provided with ear plates, and wherein the cross gas spring units and the lateral linkage unit are spaced apart from each other along the four sides of the first connecting seat and the second connecting seat.

[0008] Furthermore, the cross gas spring unit includes a gas spring rod, the two ends of which are connected to the first connecting seat and the second connecting seat via ball joints.

[0009] Furthermore, the transverse linkage unit includes a connecting rod and a swing arm, the connecting rod and the swing arm are hinged to each other, and one end of the connecting rod and the swing arm are rotatably connected to the ear plate by a pin.

[0010] Furthermore, the double-nut lead screw unit includes a lead screw, a first nut, a second nut, and a compression spring. The upper end of the lead screw is connected to the lower end face of the first connecting seat through a bearing seat, and the lower end of the lead screw passes through the second connecting seat and the second vehicle frame body, respectively.

[0011] Furthermore, the first nut is located in the middle section of the lead screw and is fixedly connected to the lead screw, the second nut is located below the first nut and is embedded in the second connecting seat, the second nut is threadedly connected to the lead screw, and the compression spring is sleeved between the first nut and the second nut.

[0012] Furthermore, the drive motor is fixed to the lower end of the second frame body, and its drive end is connected to the lower end of the lead screw.

[0013] Furthermore, slot mounting blocks are provided on the end faces of the first connecting seat and the second connecting seat that are adjacent to the first frame body and the second frame body.

[0014] Furthermore, the first frame body and the second frame body are X-shaped and each has a dovetail groove that matches the slot mounting block. The first connecting seat and the second connecting seat are detachably connected to the first frame body and the second frame body respectively through the dovetail groove.

[0015] Furthermore, the end of the second frame body has a wheel mounting plate, which is integrally formed with the second frame body.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0018] Through composite shock absorption and high-precision adjustment design, the ride comfort and adaptability are significantly improved. The cross air spring unit and the lateral linkage form a three-dimensional shock absorption system, which effectively absorbs multi-directional impacts and reduces vertical vibration attenuation rate and lateral attenuation rate.

[0019] The double-nut lead screw unit is preloaded by a spring and driven by a drive motor to rotate the lead screw, thereby controlling the frame spacing to achieve lifting and lowering, meeting the seat height adaptation needs of different height ranges;

[0020] The lightweight connector adopts a dovetail quick-release structure, is compatible with modular design, and can reduce the size after folding. The wheel mounting plate is integrally molded to improve impact resistance. The standardized hole positions are compatible with mainstream drive wheel components, reducing maintenance costs while taking into account portability and structural strength.

[0021] 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

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0024] Figure 3 This is a partial structural diagram of the present invention.

[0025] Figure label:

[0026] 1. First frame body; 2. Second frame body; 201. Wheel mounting plate; 3. Cross air spring unit; 301. Air spring rod; 302. Ball joint; 4. Lateral linkage unit; 401. Linkage rod; 402. Swing arm; 403. Pin; 5. Double nut lead screw unit; 501. Lead screw; 502. First nut; 503. Second nut; 504. Compression spring; 505. Bearing seat; 6. Drive motor; 7. First connecting seat; 8. Second connecting seat; 9. Ear plate; 10. Slot mounting block; 11. Dovetail groove. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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. Example

[0031] See attached document Figure 1-3 An elastic shock-absorbing connection device for an X-shaped folding frame includes a first frame body 1 and a second frame body 2. The first frame body 1 and the second frame body 2 are provided with a composite shock-absorbing component, a lifting adjustment component, and a lightweight connecting seat. The composite shock-absorbing component includes two sets of mirror-arranged cross air spring units 3 and a lateral linkage unit 4. The lifting adjustment component includes a double nut screw unit 5 and a drive motor 6. The lightweight connecting seat includes a first connecting seat 7 and a second connecting seat 8. Both sides of the first connecting seat 7 and the second connecting seat 8 are provided with ear plates 9. The cross air spring units 3 and the lateral linkage unit 4 are arranged at intervals along the four sides of the first connecting seat 7 and the second connecting seat 8.

[0032] The cross gas spring unit 3 includes a gas spring rod 301. The two ends of the gas spring rod 301 are connected to the first connecting seat 7 and the second connecting seat 8 through ball joints 302. The two sets of gas spring rods 301 are arranged in a 45° cross angle mirror image between the front and rear sides of the connecting seats. The ball joint 30 has a rotational freedom of ±30°, which can adapt to multi-directional impact loads. When the wheel encounters a road bump, the gas spring rod 301 compresses and absorbs the impact energy. The built-in damper suppresses high-frequency vibration and achieves vertical shock absorption. When the wheelchair turns or tilts, the cross-arranged gas spring rods 301 generate coupling stiffness, offset the lateral moment, reduce the lateral displacement of the frame, and achieve lateral stability.

[0033] The lateral linkage unit 4 includes a link 401 and a swing arm 402, which are hinged to each other. One end of the link 401 and the swing arm 402 are rotatably connected to the ear plate 9 via a pin 403. When the second connecting seat 8 is subjected to a lateral force, the link 401 swings around the pin 403 and transmits the load to the opposite connecting seat through the swing arm 402, which is converted into the shear deformation energy of the gas spring rod 301, thereby reducing the lateral vibration attenuation rate. During the frame folding process, the link 401 swings synchronously with the swing arm 402 and then folds, ensuring that the shock absorber assembly does not interfere with the frame body.

[0034] The double-nut lead screw unit 5 includes a lead screw 501, a first nut 502, a second nut 503, and a compression spring 504. The upper end of the lead screw 501 is connected to the lower end face of the first connecting seat 7 via a bearing seat 505. The lower end of the lead screw 501 passes through the second connecting seat 8 and the second frame body 2. The first nut 502 is located in the middle section of the lead screw 501 and is fixedly connected to the lead screw 501. The second nut 503 is located below the first nut 502 and is embedded in the second connecting seat 8. The second nut 503 is threadedly connected to the lead screw 501. The compression spring 504 is sleeved on the first nut 504. Between the first nut 502 and the second nut 503, the compression spring 504 pushes the second nut 503 to always be in contact with the bottom of the lead screw, and the first nut 502 is fixed above, forming a bidirectional pre-tightening. The drive motor 6 is fixed at the lower end of the second frame body 2, and its drive end is connected to the lower end of the lead screw 501. By rotating the lead screw 501 through the drive motor 6, the second connecting seat 8 is driven to rise and fall. During the rising and falling process, the gas spring rod 301 automatically extends and retracts, and the connecting rod 401 and the swing arm 402 swing synchronously and then fold or extend relative to each other to achieve stable rising and falling, so as to meet the seat height adaptation of users of different heights.

[0035] The first connecting seat 7 and the second connecting seat 8 are each provided with a slot mounting block 10 on the end face adjacent to the first frame body 1 and the second frame body 2. The first frame body 1 and the second frame body 2 are X-shaped and each has a dovetail groove 11 that matches the slot mounting block 10. The first connecting seat 7 and the second connecting seat 8 are detachably connected to the first frame body 1 and the second frame body 2 respectively through the dovetail groove 11. The frame and the connecting seat are pushed into the dovetail groove 11 by the slot mounting block 10 until they slide to the intersection point to ensure the stability of the axle after assembly and to ensure that the parallelism of the upper and lower connecting seats is consistent. Finally, they are fixed with bolts.

[0036] The end of the second frame body 2 has a wheel mounting plate 201. The wheel mounting plate 201 and the second frame body 2 are integrally formed. The wheel mounting plate 201 has standardized mounting holes for adapting to the drive wheel assembly of mainstream electric wheelchairs.

[0037] 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 resilient shock absorbing connection device for an X-folded vehicle frame comprising a first frame body (1) and a second frame body (2), characterized in that: The first frame body (1) and the second frame body (2) are provided with a composite shock absorption assembly, a lifting adjustment assembly and a lightweight connecting seat. The composite shock absorption assembly includes two sets of mirror-arranged cross air spring units (3) and a lateral linkage unit (4). The lifting adjustment assembly includes a double nut screw unit (5) and a drive motor (6). The lightweight connecting seat includes a first connecting seat (7) and a second connecting seat (8). Both sides of the first connecting seat (7) and the second connecting seat (8) are provided with ear plates (9). The cross air spring units (3) and the lateral linkage unit (4) are arranged at intervals along the four sides of the first connecting seat (7) and the second connecting seat (8).

2. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 1, characterized in that: The cross gas spring unit (3) includes a gas spring rod (301), and the two ends of the gas spring rod (301) are connected to the first connecting seat (7) and the second connecting seat (8) through ball joints (302).

3. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 1, characterized in that: The transverse linkage unit (4) includes a connecting rod (401) and a swing arm (402). The connecting rod (401) and the swing arm (402) are hinged to each other. One end of the connecting rod (401) and the swing arm (402) are rotatably connected to the ear plate (9) through a pin (403).

4. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 1, characterized in that: The double nut lead screw unit (5) includes a lead screw (501), a first nut (502), a second nut (503) and a compression spring (504). The upper end of the lead screw (501) is connected to the lower end face of the first connecting seat (7) through a bearing seat (505). The lower end of the lead screw (501) passes through the second connecting seat (8) and the second frame body (2) respectively.

5. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 4, characterized in that: The first nut (502) is located in the middle section of the lead screw (501) and is fixedly connected to the lead screw (501). The second nut (503) is located below the first nut (502) and is embedded in the second connecting seat (8). The second nut (503) is threadedly connected to the lead screw (501). The compression spring (504) is sleeved between the first nut (502) and the second nut (503).

6. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 1, characterized in that: The drive motor (6) is fixed at the lower end of the second frame body (2), and its drive end is connected to the lower end of the lead screw (501).

7. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 1, characterized in that: The first connecting seat (7) and the second connecting seat (8) are provided with slot mounting blocks (10) on the end faces adjacent to the first frame body (1) and the second frame body (2).

8. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 7, characterized in that: The first frame body (1) and the second frame body (2) are X-shaped and each has a dovetail groove (11) that matches the slot mounting block (10). The first connecting seat (7) and the second connecting seat (8) are detachably connected to the first frame body (1) and the second frame body (2) respectively through the dovetail groove (11).

9. The elastic shock-absorbing connection device for an X-shaped folding frame according to claim 1, characterized in that: The end of the second frame body (2) has a wheel mounting plate (201), which is integrally formed with the second frame body (2).

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