Adjustable double-cavity front fork shock absorber

Abstract

The invention provides an adjustable double-cavity front fork shock absorber, and relates to the technical field of shock absorbers. An outer cylinder is fixed on the mounting frame, an inner pipe slides in the outer cylinder, and a first spiral spring slides in the inner pipe; the outer cylinder is in threaded connection with an adjusting bolt, one end below the adjusting bolt is not provided with threads, one end below the adjusting bolt is inserted into a pipe fitting, and an extrusion head is inserted into the pipe fitting. Pre-adjustment is conducted through oil extrusion, when the adjusting bolt is rotated, the bolt can extrude oil in the pipe fitting, the extrusion head is pushed to move downwards under the pressure effect of the oil, then the first spiral spring is precisely extruded, and pre-adjustment of the first buffering assembly is completed. Compared with a traditional direct mechanical extrusion mode, the fluid characteristic of oil liquid can effectively reduce the looseness probability of the adjusting bolt, meanwhile, the influence of pitch errors on the adjusting precision is avoided, the adjusting precision of the first buffering assembly is greatly improved, and the damping buffering strength can be flexibly set according to different riding scenes.

Description

Technical Field

[0001] This invention relates to the field of shock absorber technology, and more particularly to an adjustable dual-chamber front fork shock absorber. Background Technology

[0002] Dual-chamber front fork shock absorbers are high-performance suspension components installed at the front of vehicles such as motorcycles, mountain bikes, and all-terrain vehicles. The core of them is to achieve oil-gas separation and precise damping control using two independent chambers (dual chamber / dual cylinder), which is different from the traditional single-chamber structure.

[0003] Existing dual-chamber front fork shock absorbers still have the following shortcomings: Although the existing device can be adjusted, its adjustment structure is prone to loosening during use; Although the existing device can be adjusted, it is too affected by the pitch and the adjustment is not precise enough. Existing devices cannot provide multiple anti-loosening measures for the adjustment components, and the adjustment structure of this application has poor adaptability during adjustment and cannot be adapted to multiple tools at the same time. Summary of the Invention

[0004] This invention relates to an adjustable dual-chamber front fork shock absorber, which solves the problems of existing devices, although they can be adjusted, their adjustment structure is prone to loosening during use; existing devices, although they can be adjusted, are too affected by the pitch and the adjustment is not precise enough; existing devices cannot provide multiple anti-loosening measures for the adjustment components, and the adjustment structure of this application has poor adaptability during adjustment and cannot be adapted to multiple tools at the same time.

[0005] This invention provides an adjustable dual-chamber front fork shock absorber, specifically comprising: a mounting bracket; an outer cylinder fixed on the mounting bracket, an inner tube sliding inside the outer cylinder, and a first helical spring sliding inside the inner tube; an adjusting bolt threaded onto the outer cylinder, the lower end of the adjusting bolt being unthreaded, the lower end of the adjusting bolt being inserted into a tube fitting, a compression head being inserted into the tube fitting, and the lower end of the compression head contacting the upper end of the first helical spring.

[0006] Furthermore, the inner tube is filled with oil, which comes into contact with the extrusion head and the adjusting bolt. During the pre-adjustment of the first buffer assembly, the adjusting bolt is rotated to extrude the oil in the tube.

[0007] Furthermore, the adjustment point of the adjusting bolt is a hexagonal prism structure, and the adjustment point of the adjusting bolt has an adjustment groove, which is a hexagonal groove structure.

[0008] Furthermore, an elastic tube is fitted onto the adjusting bolt. The elastic tube is made of rubber. One end of the elastic tube is in elastic contact with the adjustment point of the adjusting bolt, and the other end of the elastic tube is in elastic contact with the upper end face of the outer cylinder. The elastic tube is an auxiliary component to prevent the adjusting bolt from loosening.

[0009] Furthermore, spring rods are symmetrically fixed on the outer cylinder, and the protruding ends of the spring rods are all fixed on the auxiliary seats, which are in elastic contact with the adjusting bolts.

[0010] Furthermore, a seat is fixed on the pipe fitting, and a second helical spring is sleeved on the pipe fitting. The upper end of the second helical spring is in elastic contact with the seat, and the lower end of the second helical spring is in elastic contact with the extrusion head. The second helical spring is a buffer for the extrusion head.

[0011] Furthermore, a second buffer assembly, which is a damping shock absorption cavity, is fixed on the mounting bracket.

[0012] Furthermore, an auxiliary groove is provided at one end of the extrusion head and at the other end of the adjusting bolt. The auxiliary groove is a conical groove structure. The first helical spring, the tube, the extrusion head, the adjusting bolt, the adjusting groove, the elastic tube, the spring rod, the auxiliary seat, the seat body, the second helical spring, and the auxiliary groove together constitute the first buffer assembly.

[0013] This invention provides an adjustable dual-chamber front fork shock absorber, which has the following beneficial effects: This application utilizes hydraulic compression for pre-adjustment. When the adjusting bolt is rotated, the bolt can compress the hydraulic fluid inside the pipe. Under the pressure of the hydraulic fluid, the compression head moves downward, thereby precisely compressing the first helical spring and completing the pre-adjustment of the first buffer component. Compared with the traditional direct mechanical compression method, the fluid characteristics of the hydraulic fluid can effectively reduce the probability of the adjusting bolt loosening, while avoiding the influence of pitch error on the adjustment accuracy. This significantly improves the adjustment accuracy of the first buffer component and allows for flexible setting of the shock absorption and cushioning force according to different riding scenarios.

[0014] The adjustment point of the adjusting bolt in this application adopts a hexagonal prism structure and has a hexagonal adjustment groove. In actual adjustment, it can be operated by directly engaging the bolt adjustment point with a wrench, or by inserting a hexagonal wrench into the adjustment groove. The two operation methods are suitable for different tool usage scenarios, which greatly improves the convenience and versatility of the adjustment operation, and makes it easier for maintenance personnel to quickly complete the secondary adjustment and maintenance of the shock absorber parameters.

[0015] The elastic tube sleeved on the adjusting bolt of this application is made of rubber. Its upper and lower ends are in elastic contact with the bolt adjustment point and the upper end face of the outer cylinder, respectively, which can form a continuous elastic compression on the adjusting bolt, effectively preventing the bolt from loosening due to vibration during the operation of the shock absorber. At the same time, the ends of the symmetrically fixed spring rods on the outer cylinder are connected to auxiliary seats. The auxiliary seats are in elastic contact with the adjusting bolt, further forming an elastic limiting structure. The double anti-loosening design fundamentally reduces the probability of the adjusting bolt loosening, ensures the adjustment stability of the shock absorber during long-term operation, and avoids the problem of buffer force failure caused by bolt loosening.

[0016] A second helical spring is sleeved between the seat and the extrusion head on the fitting of this application. This spring serves as a buffer for the extrusion head, providing elastic buffering during the movement and stress of the extrusion head. This further enhances the buffering effect of the extrusion head, reduces rigid impact between mechanical parts, and extends the service life of the first helical spring and the extrusion head.

[0017] The second buffer component fixed on the mounting bracket of this application adopts a damping shock absorption cavity structure, which forms a synchronous buffer system with the first buffer component. The dual buffer structure works together to greatly improve the overall buffering effect. At the same time, the damping shock absorption cavity can efficiently absorb the impact energy generated during riding, effectively attenuate vibration transmission, and improve riding comfort and stability.

[0018] This application provides conical auxiliary grooves above the extrusion head and below the adjusting bolt. This structure can effectively reduce the probability of oil leakage from the connection between the pipe and the extrusion head and adjusting bolt, ensure stable oil circulation in the oil cavity, maintain the normal working pressure of the shock absorber, avoid the decrease in buffering performance due to oil leakage, and further improve the operational reliability and service life of the shock absorber. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram: Figure 1 A front view of the adjustable dual-chamber front fork shock absorber of the present invention is shown; Figure 2 A perspective view of the adjustable dual-chamber front fork shock absorber of the present invention is shown; Figure 3 An enlarged view of point A is shown in the adjustable dual-chamber front fork shock absorber of the present invention; Figure 4 This is a perspective view of a partially cut-open adjustable dual-chamber front fork shock absorber of the present invention. Figure 5 The present invention is shown. Figure 4 Enlarged view of point B; Figure 6 A perspective view of some parts of the first buffer assembly of the present invention is shown; Figure 7 The present invention is shown. Figure 6 The disassembled 3D image; Figure 8 A perspective view of the extrusion head of the present invention after being cut open is shown.

[0022] List of reference numerals 1. Mounting bracket; 2. Outer cylinder; 201. Inner tube; 3. First buffer assembly; 301. First helical spring; 302. Pipe fitting; 303. Extrusion head; 304. Adjusting bolt; 305. Adjustment groove; 306. Elastic tube; 307. Spring rod; 308. Auxiliary seat; 309. Seat body; 310. Second helical spring; 311. Auxiliary groove; 4. Second buffer assembly. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Unless otherwise defined, all terms (including technical and scientific terms) used in embodiments of this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as being interpreted in an idealized or highly formalized sense, unless expressly defined in this embodiment of the invention.

[0025] The terms "first," "second," and similar words used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Likewise, the terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, spatial and directional terms such as "upper," "lower," "front," "rear," "top," "bottom," "vertical," and "horizontal" may be used to describe embodiments of the invention; however, it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect," "link," "fix," and "attach" can refer to a direct connection between two elements or structures without other elements or structures, or to an indirect connection between two elements or structures through an intermediate element or structure, unless otherwise expressly stated herein.

[0026] Example 1: Please refer to Figures 1 to 8 : This invention proposes an adjustable dual-chamber front fork shock absorber, comprising: a mounting bracket 1; an outer cylinder 2 fixed on the mounting bracket 1, an inner tube 201 sliding inside the outer cylinder 2, and a first coil spring 301 sliding inside the inner tube 201; an adjusting bolt 304 threadedly connected to the outer cylinder 2, the lower end of the adjusting bolt 304 having no thread, the lower end of the adjusting bolt 304 being inserted into a tube 302, a compression head 303 being inserted into the tube 302, and the lower end of the compression head 303 contacting the upper end of the first coil spring 301.

[0027] The inner tube 201 is filled with oil, which comes into contact with the extrusion head 303 and the adjusting bolt 304. During the pre-adjustment of the first buffer assembly 3, the adjusting bolt 304 is rotated, which extrudes the oil in the tube 302. Under the pressure of the oil, the extrusion head 303 moves downward, thereby extruding the first helical spring 301, thus achieving the pre-adjustment of the first buffer assembly 3. Compared with the existing device, the extrusion of the oil reduces the probability of the adjusting bolt 304 becoming loose. The adjustment by the extrusion of the oil reduces the impact of the pitch on the adjustment accuracy.

[0028] The adjusting bolt 304 has a hexagonal prism-shaped adjustment point and an adjusting groove 305. The adjusting groove 305 is a hexagonal groove-shaped structure. During adjustment, a wrench can be used to directly adjust the adjusting bolt 304, or a hexagonal wrench can be inserted into the adjusting groove 305. Compared with the existing device, this application is more adaptable and more flexible.

[0029] The adjusting bolt 304 is fitted with an elastic tube 306, which is made of rubber. The upper end of the elastic tube 306 is in elastic contact with the adjustment point of the adjusting bolt 304, and the lower end of the elastic tube 306 is in elastic contact with the upper end face of the outer cylinder 2. The elastic tube 306 is an anti-loosening auxiliary component for the adjusting bolt 304. Under the elastic compression of the adjusting bolt 304 by the elastic tube 306, the probability of the adjusting bolt 304 loosening can be reduced. The anti-loosening is achieved by the friction between the elastic tube 306 and the adjusting bolt 304.

[0030] Among them, spring rods 307 are symmetrically fixed on the outer cylinder 2. The protruding ends of the spring rods 307 are all fixed on the auxiliary seat 308. The auxiliary seat 308 is in elastic contact with the adjusting bolt 304. Under the elastic compression of the auxiliary seat 308, the probability of the adjusting bolt 304 loosening can be further reduced.

[0031] The fitting 302 is fixed with a seat 309 and a second helical spring 310 is sleeved on the fitting 302. The upper end of the second helical spring 310 is in elastic contact with the seat 309, and the lower end of the second helical spring 310 is in elastic contact with the extrusion head 303. The second helical spring 310 is a buffer for the extrusion head 303. In the actual buffering process, the first helical spring 301 and the second helical spring 310 are buffered synchronously, which can improve the buffering effect of the first buffer assembly 3.

[0032] An auxiliary groove 311 is provided at one end of the extrusion head 303 and at one end of the adjusting bolt 304. The auxiliary groove 311 is a conical groove structure. The first helical spring 301, the pipe fitting 302, the extrusion head 303, the adjusting bolt 304, the adjusting groove 305, the elastic tube 306, the spring rod 307, the auxiliary seat 308, the seat body 309, the second helical spring 310 and the auxiliary groove 311 together form the first buffer assembly 3. Under the action of the auxiliary groove 311, the probability of oil leakage from the connection between the pipe fitting 302 and the extrusion head 303 and the adjusting bolt 304 can be reduced.

[0033] Example 2, based on Example 1, such as Figures 1-8 As shown, a second buffer assembly 4 is fixed on the mounting bracket 1. The second buffer assembly 4 is a damping and shock-absorbing cavity. Through the synchronous buffering of the second buffer assembly 4 and the first buffer assembly 3, the buffering effect is good, and the damping and shock-absorbing cavity can absorb impact energy.

[0034] Example 3, based on Example 2, such as Figures 1-8 As shown, fitting 302 is a high-strength pipe, which can prevent deformation of fitting 302 during the buffering process, thereby affecting the buffering effect.

[0035] The working principle of this embodiment: The mounting frame 1 serves as the overall mounting base, fixing the outer cylinder 2. An inner tube 201 is slidably mounted inside the outer cylinder 2, housing the first helical spring 301, forming the core load-bearing and buffering structure of the shock absorber. Oil is added to the inner tube 201, simultaneously contacting the adjusting bolt 304 and the compression head 303, becoming the core medium for hydraulic control, providing a basis for precise adjustment of the shock absorber parameters. When the shock absorber preload needs adjustment, the core adjustment action is completed through the adjusting bolt 304. The adjusting bolt 304 is threaded to the outer cylinder 2, and its adjustment point is designed as a hexagonal prism structure with a hexagonal adjustment groove 305, allowing for direct tightening and adjustment using a wrench. A hex wrench can be inserted into the slot for operation, adapting to different adjustment scenarios; when the adjusting bolt 304 is rotated, its unthreaded section is inserted into the pipe 302, which will squeeze the oil inside the pipe 302. Under the hydraulic transmission of the oil, the squeezing head 303 moves downward along the inner tube 201, thereby squeezing the first helical spring 301, thus completing the pre-adjustment of the first buffer component 3; compared with traditional direct mechanical adjustment, the squeezing effect of the oil can significantly reduce the probability of the adjusting bolt 304 loosening, while avoiding the influence of the pitch on the adjustment accuracy, achieving more delicate pre-tightening force control; to further enhance the adjustment stability, the shock absorber is equipped with multiple anti-loosening auxiliary structures; a rubber material is sleeved on the adjusting bolt 304. The elastic tube 306 has its upper and lower ends in elastic contact with the adjustment point of the adjusting bolt 304 and the upper end face of the outer cylinder 2, respectively, forming the first anti-loosening barrier through elastic compression. A spring rod 307 symmetrically fixed on the outer cylinder 2 has its extended end connected to an auxiliary seat 308, which elastically contacts the adjusting bolt 304, forming the second anti-loosening structure. This dual elastic action effectively prevents the adjusting bolt 304 from loosening during vibration, ensuring long-term stability. The improved buffering effect relies on the coordinated work of the dual buffer components. The first buffer component 3 achieves initial buffering through oil compression and the elastic deformation of the first helical spring 301. Simultaneously, the seat 309 on the tube 302 and the compression head 303 are fitted together... The second helical spring 310 serves as a buffer for the extrusion head 303, further enhancing its buffering performance. The second buffer assembly 4 fixed on the mounting bracket 1 is a damping shock absorption chamber. When working synchronously with the first buffer assembly 3, it can efficiently absorb impact energy through the damping principle, achieving dual-stage buffering and significantly improving the overall shock absorption effect. In terms of sealing performance, conical auxiliary grooves 311 are provided above the extrusion head 303 and below the adjusting bolt 304. This structure can effectively reduce the probability of oil leakage from the connection between the pipe 302 and the extrusion head 303 and the adjusting bolt 304, ensuring the normal operation of the hydraulic system and ensuring the long-term stable adjustment and buffering capacity of the shock absorber.

[0036] Although this application has been described with reference to the foregoing embodiments, those skilled in the art will understand that various changes can be made without departing from the spirit and scope of this application as defined by the appended claims. While this specification contains details of many specific implementations, these should not be construed as limiting the scope of the claims, but rather as descriptions of features specific to particular embodiments. The scope of this application is defined by the appended claims and their equivalents, and is not limited to the embodiments described above.

Claims

1. An adjustable dual-chamber front fork shock absorber, characterized in that, include: Mounting bracket (1); an outer cylinder (2) is fixed on the mounting bracket (1), an inner tube (201) slides inside the outer cylinder (2), and a first helical spring (301) slides inside the inner tube (201); an adjusting bolt (304) is threaded on the outer cylinder (2), the lower end of the adjusting bolt (304) has no thread, the lower end of the adjusting bolt (304) is inserted into the pipe fitting (302), and a pressing head (303) is inserted into the pipe fitting (302), the lower end of the pressing head (303) is in contact with the upper end of the first helical spring (301).

2. The adjustable dual-chamber front fork shock absorber according to claim 1, characterized in that, The inner tube (201) is filled with oil, which comes into contact with the extrusion head (303) and the adjusting bolt (304). When the first buffer assembly (3) is pre-adjusted, the adjusting bolt (304) is rotated, and the adjusting bolt (304) extrudes the oil in the tube (302).

3. An adjustable dual-chamber front fork shock absorber according to claim 2, characterized in that, The adjustment point of the adjusting bolt (304) is a hexagonal prism structure, and the adjustment point of the adjusting bolt (304) is provided with an adjustment groove (305), which is a hexagonal groove structure.

4. An adjustable dual-chamber front fork shock absorber according to claim 3, characterized in that, An elastic tube (306) is sleeved on the adjusting bolt (304). The elastic tube (306) is made of rubber. The upper end of the elastic tube (306) is in elastic contact with the adjustment point of the adjusting bolt (304), and the lower end of the elastic tube (306) is in elastic contact with the upper end face of the outer cylinder (2). The elastic tube (306) is an anti-loosening auxiliary component for the adjusting bolt (304).

5. An adjustable dual-chamber front fork shock absorber according to claim 4, characterized in that, Spring rods (307) are symmetrically fixed on the outer cylinder (2). The protruding ends of the spring rods (307) are all fixed on the auxiliary seat (308). The auxiliary seat (308) is in elastic contact with the adjusting bolt (304).

6. An adjustable dual-chamber front fork shock absorber according to claim 5, characterized in that, A seat (309) is fixed on the pipe fitting (302), and a second helical spring (310) is sleeved on the pipe fitting (302). The upper end of the second helical spring (310) is in elastic contact with the seat (309), and the lower end of the second helical spring (310) is in elastic contact with the extrusion head (303). The second helical spring (310) is a buffer for the extrusion head (303).

7. An adjustable dual-chamber front fork shock absorber according to claim 6, characterized in that, The mounting bracket (1) is fixed with a second buffer assembly (4), which is a damping and shock absorption cavity.

8. An adjustable dual-chamber front fork shock absorber according to claim 7, characterized in that, An auxiliary groove (311) is provided at one end of the upper part of the extrusion head (303), and an auxiliary groove (311) is also provided at one end of the lower part of the adjusting bolt (304). The auxiliary groove (311) is a conical groove structure. The first helical spring (301), the pipe fitting (302), the extrusion head (303), the adjusting bolt (304), the adjusting groove (305), the elastic tube (306), the spring rod (307), the auxiliary seat (308), the seat body (309), the second helical spring (310), and the auxiliary groove (311) together form the first buffer assembly (3).

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