Length pre-pressing and stiffness adjustable shock absorber coil spring assembly

Abstract

This utility model discloses a shock absorber assembly with adjustable length preload and stiffness, belonging to the field of automotive suspension. The assembly includes a lower bushing, a lower shock absorber core assembly, a lower support plate for the coil spring, a variable stiffness coil spring, a buffer block, an upper pressure plate for the coil spring, a nut, a piston rod, a nut gasket, a lower support washer for the gasket, a sleeve, a sleeve fixing nut, an upper fixing washer for the gasket, a locking nut, and a damping gasket. By adjusting the position of the upper pressure plate for the coil spring and related nuts on the piston rod, the stiffness and preload of the shock absorber can be adjusted; by adjusting the position of the nut gasket and the sleeve fixing nut, the overall installation length of the shock absorber assembly can be adjusted. This utility model can quickly adapt to the suspension parameter requirements of different vehicle models and configurations, shorten the debugging cycle, reduce costs, and improve the reusability of prototypes.

Description

Technical Field

[0001] This utility model relates to the field of automotive suspension, specifically to a shock absorber assembly with adjustable length preload and stiffness, featuring a coil spring. Background Technology

[0002] The existing technical solution has the following problems: Because the upper pressure plate of the coil spring is welded to the piston rod and the upper rubber sleeve mounting screw as a whole, the length, preload, and stiffness of the shock absorber with coil spring assembly are not adjustable. For new models or models with significant changes in axle load due to new configurations, or models with changed tire diameter specifications, it is necessary to re-manufacture the shock absorber with coil spring assembly and adjust parameters such as length and preload to ensure the overall vehicle posture and comfort; the production cycle of the new shock absorber is long, and the axle load of the new model is uncertain, which may require multiple rounds of adjustments, affecting the project progress.

[0003] Hand-made prototypes are only applicable to a single test vehicle, and prototypes cannot be reused after configuration changes cause axle load variations. Utility Model Content

[0004] This invention aims to solve the above-mentioned technical problems by providing a shock absorber assembly with adjustable length preload and stiffness, featuring a helical spring.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A vibration damper assembly with adjustable length preload and stiffness and a helical spring includes a lower core assembly of the vibration damper, wherein a lower rubber sleeve is installed at the lower end of the lower core assembly of the vibration damper.

[0007] The lower core assembly of the shock absorber includes a lower core body, a guide rod on the lower core body, and a buffer block fitted on the outside of the lower core body;

[0008] A helical spring lower support plate is installed on the outer side of the lower core body, and a threaded piston rod is installed on the upper part of the guide rod. A helical spring upper pressure plate, a nut, and a connecting device for connecting the vehicle body longitudinal beam are threaded on the piston rod.

[0009] A variable stiffness helical spring is installed between the upper pressure plate and the lower support plate of the helical spring, and the buffer block is located inside the variable stiffness helical spring.

[0010] The connecting device includes, in sequence, a nut gasket on the piston rod, a support gasket below the gasket, a sleeve, a sleeve fixing nut, a fixing gasket on the gasket, and a locking nut.

[0011] The nut gasket, locking nut, and sleeve fixing nut are threadedly connected to the piston rod.

[0012] Both the lower support pad and the upper fixing pad of the rubber pad are equipped with shock-absorbing rubber pads on their opposite sides, and the shock-absorbing rubber pads are fitted on the outside of the sleeve and the sleeve fixing nut.

[0013] The lower support pad, sleeve, and upper fixing pad of the rubber pad are fitted onto the piston rod.

[0014] The nut gasket, the lower support gasket, and the sleeve can be welded together as one unit.

[0015] The upper pressure plate of the helical spring is a pressure plate with internal threads.

[0016] With the above structure, this utility model has the following advantages:

[0017] This utility model's adjustable shock absorber assembly allows for adjustment of stiffness, preload, and assembly height through the adjustment of the positions of the adjusting nuts on the piston rod. When the test vehicle undergoes changes such as weight distribution or tire diameter specifications, the suspension can be quickly adjusted. This enables faster and more accurate identification of the appropriate design parameters for shock absorbers, springs, and other components to suit the new vehicle's suspension, reducing the cumbersome process of debugging and prototyping. Furthermore, the assembly is reusable, reducing prototyping costs and shortening the project timeline.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of this utility model;

[0022] Figure 3 This is an installation diagram of this utility model.

[0023] As shown in the figure: 1. Lower rubber sleeve; 2. Lower core assembly of shock absorber; 201. Lower core body; 202. Guide rod; 3. Lower support plate of helical spring; 4. Variable stiffness helical spring; 5. Buffer block; 6. Upper pressure plate of helical spring; 7. Nut; 8. Piston rod; 9. Nut rubber washer; 10. Lower support washer of rubber washer; 11. Sleeve; 12. Sleeve fixing nut; 13. Upper fixing washer of rubber washer; 14. Locking nut; 15. Shock-absorbing rubber pad. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] The present invention will now be described in further detail in conjunction with the full text.

[0027] Combined with appendix Figure 1 and Figure 3 A shock absorber assembly with adjustable length preload and stiffness and a helical spring, including a lower core assembly 2 of the shock absorber, and a lower rubber sleeve 1 installed at the lower end of the lower core assembly 2 of the shock absorber.

[0028] The lower core assembly 2 of the shock absorber includes a lower core body 201, a guide rod 202 on the lower core body 201, and a buffer block 5 fitted on the outside of the lower core body 201;

[0029] A helical spring lower support plate 3 is installed on the outer side of the lower core body 201, and a threaded piston rod 8 is installed on the upper part of the guide rod 202. A helical spring upper pressure plate 6, a nut 7 and a connecting device for connecting the longitudinal beam of the vehicle body are threaded on the piston rod 8.

[0030] A variable stiffness helical spring 4 is installed between the upper pressure plate 6 and the lower support plate 3 of the helical spring, and the buffer block 5 is located inside the variable stiffness helical spring 4.

[0031] The connecting device includes a nut gasket 9 on the piston rod 8, a support gasket 10 below the gasket, a sleeve 11, a sleeve fixing nut 12, a fixing gasket 13 on the gasket, and a locking nut 14, which are arranged in sequence.

[0032] Nut gasket 9, locking nut 14, sleeve fixing nut 12 are threadedly connected to piston rod 8.

[0033] Both the lower support pad 10 and the upper fixing pad 13 of the rubber pad are equipped with shock-absorbing rubber pads 15, and the shock-absorbing rubber pads 15 are fitted on the outside of the sleeve 11 and the sleeve fixing nut 12.

[0034] The lower support pad 10, sleeve 11, and upper fixing pad 13 of the rubber pad are fitted onto the piston rod 8.

[0035] In specific implementations of this utility model, the nut rubber washer 9, the lower support washer 10, and the sleeve 11 can be welded together as a whole, and the upper pressure plate 6 of the helical spring is a pressure plate with internal threads. The nut rubber washer 9, the lower support washer 10, and the sleeve 11 can be welded together as a whole, and the upper pressure plate 6 of the helical spring can be replaced by a pressure plate with internal threads.

[0036] The stiffness and preload of the shock absorber can be adjusted by adjusting the upper and lower positions of the pressure plate 6 and nut 7 on the threaded part of the piston rod 8; the total installation length of the shock absorber assembly can be adjusted by adjusting the positions of the nut pad 9 and the sleeve fixing nut 12.

[0037] The working principle of this utility model:

[0038] like Figure 3 The shock absorber structure shown allows for adjustment of the height between the vehicle body and the rear axle, as well as the shock absorber stiffness and preload, by adjusting the relative position of the adjusting nut on the piston rod.

[0039] When it is necessary to adjust the stiffness and preload of the shock absorber, loosen the nut 7, and the upper pressure plate 6 of the helical spring rotates and moves on the outside of the piston rod 8 to move the upper pressure plate 6 of the helical spring up and down to the position of the threaded part of the piston rod 8. Then tighten the nut 7 to fix it, and the stiffness and preload can be adjusted.

[0040] When it is necessary to adjust the total installation length of the shock absorber assembly, loosen the sleeve fixing nut 12 and the locking nut 14, move the position of the rubber pad lower support shim 10 and the sleeve 11 up and down, and then tighten the sleeve fixing nut 12, the nut rubber pad 9 and the locking nut 14 to complete the adjustment of the total installation length.

[0041] In practical applications, adjustments can be made according to the axle load, tire diameter, and other parameters of different vehicle models, following the above method, to meet the requirements of vehicle posture and comfort. Furthermore, when vehicle configuration changes, the assembly does not need to be remanufactured; it can be reused simply by adjusting the positions of the relevant nuts, effectively improving efficiency and reducing costs.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout the text are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A vibration damper assembly with adjustable length preload and stiffness, characterized in that, Includes a lower core assembly (2) of the shock absorber, and a lower rubber sleeve (1) is installed at the lower end of the lower core assembly (2). The lower core assembly (2) of the shock absorber includes a lower core body (201), a guide rod (202) on the lower core body (201), and a buffer block (5) fitted on the outside of the lower core body (201). The lower core body (201) is equipped with a helical spring lower support plate (3), the guide rod (202) is equipped with a threaded piston rod (8), and the piston rod (8) is threaded with a helical spring upper pressure plate (6), a nut (7) and a connecting device for connecting the vehicle body longitudinal beam. A variable stiffness helical spring (4) is installed between the upper pressure plate (6) and the lower support plate (3) of the helical spring, and the buffer block (5) is located inside the variable stiffness helical spring (4).

2. The shock absorber assembly with adjustable length preload and stiffness according to claim 1, characterized in that, The connecting device includes a nut gasket (9), a lower support gasket (10), a sleeve (11), a sleeve fixing nut (12), a fixing gasket (13) on the piston rod (8), and a locking nut (14) arranged in sequence.

3. The shock absorber assembly with adjustable length preload and stiffness according to claim 2, characterized in that, The nut gasket (9), locking nut (14), sleeve fixing nut (12) are threadedly connected to the piston rod (8).

4. The shock absorber assembly with adjustable length preload and stiffness according to claim 2, characterized in that, The opposing surfaces of the lower support pad (10) and the upper fixing pad (13) of the rubber pad are both equipped with shock-absorbing rubber pads (15), and the shock-absorbing rubber pads (15) are fitted on the outside of the sleeve (11) and the sleeve fixing nut (12).

5. The shock absorber assembly with adjustable length preload and stiffness according to claim 2, characterized in that, The lower support pad (10), sleeve (11) and upper fixing pad (13) are fitted onto the piston rod (8).

6. The shock absorber assembly with adjustable length preload and stiffness according to claim 2, characterized in that, The nut gasket (9), the lower support gasket (10), and the sleeve (11) can be welded together as one unit.

7. The shock absorber assembly with adjustable length preload and stiffness according to claim 1, characterized in that, The upper pressure plate (6) of the helical spring is a pressure plate with internal threads.

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