Dustproof suspension fork

Abstract

The utility model provides a dustproof suspension fork, and belongs to the field of front forks. The problem that existing impurities are prone to being accumulated at the joint of a piston barrel and a piston column is solved. The dustproof shock-proof front fork comprises two front fork vertical pipes and two lower connecting plates, two connecting shoulders are arranged in an up-down structure, each front fork vertical pipe is composed of a piston cylinder and a piston column, the tail end of each piston column is provided with a connecting base, the dustproof shock-proof front fork further comprises a dustproof assembly, and the dustproof assembly comprises a dustproof cover. A connecting piece and a mounting flange are arranged at the two ends of the dust cover respectively, a matching portion is arranged on the piston cylinder in a radial outward extending mode, a through hole is formed in the center of the connecting piece, and the through hole and the matching portion are connected in a matched mode through internal threads and external threads, so that the dust cover can be rapidly assembled and disassembled conveniently, and the mounting flange is matched with a connecting base at the tail end of a piston column in an abutting mode. And a sealing washer capable of improving the connection sealing strength is further arranged between the mounting flange and the connecting seat. The utility model has the advantage of good dustproof effect.

Description

A dustproof and shock-absorbing front fork Technical Field

[0001] This utility model belongs to the field of front forks, and relates to a front fork, and particularly to a dustproof and shock-absorbing front fork. Background Technology

[0002] Bicycles, as one of the earliest modes of transportation, remain popular due to their affordability and versatility. However, the current front fork assembly features complex connections between its components, making assembly difficult. Furthermore, impurities often accumulate between the fork and the shock absorbers, leading to poor sliding between them under prolonged use and affecting shock absorption. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a dustproof and shock-absorbing front fork to solve these issues.

[0004] The purpose of this utility model can be achieved through the following technical solution: a dustproof and shock-absorbing front fork, including two fork stems and two lower connecting plates that facilitate the fixed connection of the fork stems, the two connecting shoulders are arranged in an upper and lower structure, each fork stem is composed of a piston cylinder that can be used for shock absorption and a piston rod that is movablely engaged with the piston cylinder, the piston rod has a connecting seat at the end, characterized in that the dustproof and shock-absorbing front fork also includes a dustproof component;

[0005] The dustproof assembly includes a dustproof cover with elastic shrinkage characteristics for dustproof function, and connectors and mounting flanges are respectively provided at both ends of the dustproof cover;

[0006] The piston cylinder is provided with a mating part extending radially outward, and the connecting part has a through hole at the center. The through hole and the mating part are connected by internal and external threads, which facilitates the quick assembly and disassembly of the dust cover.

[0007] The mounting flange abuts against the connecting seat at the end of the piston rod and is fixed together by fastening screws. A sealing gasket is also provided between the mounting flange and the connecting seat to improve the sealing strength of the connection.

[0008] In the aforementioned dustproof and shock-absorbing front fork, both ends of the sealing gasket are designed with an inwardly concave arc structure, and both ends are pressed and fitted onto the connecting seat and the mounting flange respectively to form a static seal.

[0009] In the aforementioned dustproof and shock-absorbing fork, the dust cover, connector, and mounting flange can be integrally formed. The dust cover adopts a corrugated pipe structure with equidistantly distributed annular pleats on its surface, and the distance between adjacent pleats is less than 1 / 3 of the axial travel of the dust cover.

[0010] In the aforementioned dustproof and shock-absorbing front fork, the outer surface of the mating part is provided with two parallel annular sealing grooves, and the sealing grooves are embedded with O-rings made of fluororubber. The outer diameter of the O-rings is 0.1-0.3mm larger than the major diameter of the thread of the mating part.

[0011] Compared with existing technologies, this dustproof and shock-absorbing fork has the advantages of high dustproof efficiency, high durability, convenient maintenance and multiple seals. Attached Figure Description

[0012] Figure 1 is a three-dimensional structural diagram of this dustproof and shock-absorbing front fork.

[0013] Figure 2 is a three-dimensional structural diagram of the dustproof components and sealing gaskets of this dustproof and shock-absorbing fork.

[0014] Figure 3 is a partially enlarged structural schematic diagram of this dustproof and shock-absorbing front fork.

[0015] In the diagram, 1. Front fork riser; 2. Lower connecting plate; 3. Piston cylinder; 4. Piston rod; 5. Connecting seat; 6. Dust cover; 7. Connecting piece; 8. Mounting flange; 9. Mating part; 10. Sealing gasket; 11. O-ring seal. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] As shown in Figures 1, 2, and 3, this dustproof and shock-absorbing front fork includes two fork steers 1 and two lower connecting plates 2 for easy fixed connection of the fork steers 1. The two connecting shoulders are arranged in an upper and lower structure. Each fork steer 1 is composed of a piston cylinder 3 for shock absorption and a piston rod 4 that moves with the piston cylinder 3. The piston rod 4 has a connecting seat 5 at its end. The dustproof and shock-absorbing front fork also includes a dustproof assembly, which includes a dust cover 6 for dust protection and with elastic contraction characteristics. Connecting parts 7 and mounting flanges 8 are respectively provided at both ends of the dust cover 6. A mating part 9 extends radially outward on the piston cylinder 3. The connecting part 7 has a through hole at its center, and its through hole is connected to the mating part 9 by internal and external threads, which facilitates quick assembly and disassembly of the dust cover 6. The mounting flange 8 abuts against the connecting seat 5 at the end of the piston rod 4 and is fixed by fastening screws. A sealing gasket 10 is also provided between the mounting flange 8 and the connecting seat 5 to improve the connection sealing strength.

[0018] Both ends of the sealing gasket 10 are designed with inwardly concave arc structures, and their ends are respectively pressed and fitted onto the connecting seat 5 and the mounting flange 8 to form a static seal. The dust cover 6, the connecting piece 7, and the mounting flange 8 can be integrally molded. The dust cover 6 adopts a bellows structure, and its surface has equidistantly distributed annular pleats, with the distance between adjacent pleats being less than 1 / 3 of the axial travel of the dust cover 6. The outer surface of the mating part 9 has two parallel annular sealing grooves, and the sealing grooves are embedded with fluororubber O-rings 11. The outer diameter of the O-ring 11 is 0.1-0.3mm larger than the major diameter of the thread of the mating part 9. The pleat spacing design of the bellows dust cover 6 (less than 1 / 3 of the axial travel) ensures structural stability during expansion and contraction, avoiding damage from excessive stretching or compression. The fluororubber O-rings are resistant to high temperatures and corrosion, adaptable to harsh environments, and their outer diameter is slightly larger than the major diameter of the thread (0.1-0.3mm) to compensate for assembly tolerances and improve sealing reliability. The static sealing gasket 10, together with its arc-shaped end face and the dynamic O-ring, forms a double sealing barrier, significantly improving the overall sealing strength of the dustproof and shock-absorbing fork.

[0019] The dustproof and shock-absorbing fork achieves its function through the following structure: the fork steerer tube 1 is composed of a piston cylinder 3 and a piston rod 4. When the two move relative to each other, they absorb vibration energy through hydraulic or pneumatic damping to provide a buffering effect. The dust cover 6 adopts a bellows structure with equidistant annular pleats on the surface, which can elastically deform with the extension and retraction of the piston rod 4 to prevent external dust from entering the piston cylinder 3. The connecting piece 7 is fixed to the piston cylinder 3 through a threaded mating part 9, and combined with a fluororubber O-ring seal 11 embedded in the annular sealing groove, it enhances the dustproof and liquid penetration prevention capabilities of the threaded connection. The mounting flange 8 is fixed to the connecting seat 5 at the end of the piston rod 4 by fastening screws, and a static seal is formed by the recessed sealing gaskets 10 at both ends to prevent contaminants from entering.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0021] Although this document uses a lot of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any kind of additional limitation would contradict the spirit of this invention.

Claims

1. A dustproof and shock-absorbing front fork, comprising two fork stems (1) and two lower connecting plates (2) for easy fixed connection of the fork stems (1), wherein the two connecting plates are arranged in an upper and lower structure, each fork stem (1) is composed of a piston cylinder (3) for shock absorption and a piston rod (4) that movably cooperates with the piston cylinder (3), wherein the piston rod (4) has a connecting seat (5) at its end, characterized in that, The dustproof and shock-absorbing fork also includes a dustproof component; the dustproof component includes a dust cover (6) for dustproof function and with elastic shrinkage characteristics, and a connector (7) and a mounting flange (8) are respectively provided at both ends of the dust cover (6); a mating part (9) is provided radially outward on the piston cylinder (3), and the connector (7) has a through hole at the center, and its through hole is connected to the mating part (9) by internal and external thread, which facilitates the quick assembly and disassembly of the dust cover (6); the mounting flange (8) abuts against the connecting seat (5) at the end of the piston column (4) and is fixedly connected by fastening screws, and a sealing gasket (10) is also provided between the mounting flange (8) and the connecting seat (5) to improve the connection sealing strength.

2. The dustproof and shock-absorbing front fork according to claim 1, characterized in that, The sealing gasket (10) has an inwardly concave arc structure at both ends, and its two ends are pressed and adhered to the connecting seat (5) and the mounting flange (8) respectively to form a static seal.

3. The dustproof and shock-absorbing front fork according to claim 1, characterized in that, The dust cover (6), connector (7) and mounting flange (8) can be integrally formed. The dust cover (6) adopts a corrugated pipe structure, and its surface is provided with equally spaced annular pleats, and the distance between adjacent pleats is less than 1 / 3 of the axial travel of the dust cover (6).

4. The dustproof and shock-absorbing front fork according to claim 1, characterized in that, The outer surface of the mating part (9) is provided with two parallel annular sealing grooves. The sealing grooves are inlaid with fluororubber O-rings (10). The outer diameter of the O-rings (10) is 0.1-0.3 mm larger than the major diameter of the thread of the mating part (9).

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