TWI756876B - Lubricating structure of suspension fork - Google Patents

Abstract

The present invention provides a lubricating structure of suspension fork comprising more than two lubricating structures, an outer tube, an axis rod, a fixed element and a damper. Two or more lubricating structures are arranged in the inner wall of the outer tube. The shape of the axis rod is corresponded to the lubricating structures. The fixed element is fixedly engaged with the inner wall of the outer tube. The damper is sat between the axis rod and the fixed element. Two or more arranged lubricating structures not only gives a lubricating affection to the axis rod, reducing the abrasion after long-time use, also avoids getting a stuck when the lubricating structure of suspension fork receive a bumping, expanding the using-live period.

Description

Shock absorber with lubricated structure

A shock absorber, particularly a shock absorber structure with a lubricating structure.

Bicycles are not only a means of transportation in current life, but also an extremely popular sport in modern people's leisure life. Or a shock absorber is arranged on a rear frame, etc., so as to absorb the impact force caused by the uneven road surface during riding, and achieve the effect of relaxation.

A shock-absorbing front fork currently used for a bicycle is mostly an outer tube with a shaft, and a spring is arranged between the outer tube and the shaft, and the spring is used to buffer and absorb the movement of the bicycle. A lubricating bearing is sleeved between the inner wall of the outer tube and the outer wall of the shaft, so that the inner wall of the outer tube and the outer wall of the shaft can have an axial sliding relationship relative to each other.

The current lubricating bearing is mostly a ball bearing. However, the ball bearing not only has high cost and complicated structure, but also increases the load of the bicycle, and requires regular disassembly, cleaning and re-oiling maintenance, which causes inconvenience in use.

In order to overcome the above-mentioned technical difficulties such as the high cost, complex structure, heavy load and need for regular disassembly and maintenance of the current lubricated bearing, the present invention provides a shock absorber with a lubricated structure, the shock absorber with a lubricated structure comprising: an outer tube , two or more lubricating structures are arranged at intervals on the inner side wall of one of the open ends of the outer tube, and each of the lubricating structures is a non-circular annular pipe body; a shaft, one end of which restricts the rotation angle of the shaft into the lubricating structure In the structure, the shape of the shaft corresponds to the lubricating structure, and the shaft can move axially to the self-lubricating layer in a close fit; an engaging piece is fixedly engaged with the inner sidewall of the outer tube; and a damping device assembled between the engaging piece and the shaft.

Wherein, the lubricating structure includes: a self-lubricating layer, including a material with lubricating properties; a structural layer, which provides the structural strength and rigidity required by the lubricating structure, and the metal sleeve is closely attached to the self-lubricating layer to form a piece The non-circular annular tube body is formed by bending the self-moistening layer inward and the structural layer outward.

Wherein, the shock absorbing device comprises: a spring, one end of the spring is detachably engaged with the shaft rod, and the other end of the spring abuts against the engaging member.

Wherein, the axial section of the lubricating structure is a D-shaped ring, the D-shaped ring includes a straight edge, and the ratio of the straight edge to the maximum diameter of the D-shaped ring is preferably between 1:1.5 to 1:3 .

Further, the ratio of the straight edge to the maximum diameter of the D-shaped ring is 1:2.

Further, the self-moistening layer includes a Teflon.

Further, the structure layer includes a metal material.

Further, a threaded hole is recessed axially inward at the end of the shaft toward the inner hole of the tube; a through hole is axially penetrated by the engaging member; and a screw passes through the through hole and the spring in sequence. , and finally screw into the threaded hole.

Further, the shaft axially penetrates a shaft through hole; the inner wall of the axial through hole of the engaging member is provided with a thread; the screw passes through the shaft through hole and the spring in sequence, and is finally screwed with the thread .

Further, the engaging piece is a steel flower piece, and the steel flower piece includes: one or more spacers, one or more of these spacers are arranged at an axial interval with each other and the concave curvature in the same direction is an arc; and one or more Split grooves, one or more of the split grooves are radially arranged on two of the gaskets at intervals, and the outer diameter of the steel flower piece is clamped with the outer tube.

The shock absorber with lubricating structure of the present invention can achieve the following characteristics: 1. The lubricating structure is formed after the self-lubricating layer and the structural layer are closely attached and then bent and formed, so as to achieve the characteristics of low cost, simple structure and light load. 2. The lubricating material contained in the self-lubricating layer does not need to be disassembled, cleaned and re-oiled regularly, and the rigid material contained in the structural layer can provide protection and support to prevent the self-lubricating layer from breaking when it is impacted , so that the lubricating structure increases the service life. 3. The lubricating structure and the shaft corresponding to the D-shaped structure, the curved surface part of the D-shaped structure maintains the smoothness of the axial movement of the shaft relative to the outer tube, and the flat part of the D-shaped structure can be avoided. The shaft is rotated relative to the outer tube, and the probability of angle jamming caused by the rotation is reduced. 4. The two or more lubricating structures arranged at intervals give the shaft a relatively long lubrication distance, so that the shaft can slide axially relative to the outer tube smoothly, reducing the side force caused by non-unidirectional force. It can also slow down the wear of the lubricating structure after long-term use and prolong the overall service life.

Please refer to FIGS. 1 , 2 and 3 , which are a shock absorber 20 with a lubricating structure provided by a preferred embodiment of the present invention. The shock absorber 20 with a lubricating structure includes a lubricating structure 10 . The lubricating structure 10 includes a self-wetting layer 11 and a structure layer 12 . The self-lubricating layer 11 includes a material with lubricating properties, preferably a Teflon material, the structural layer 12 provides the structural strength and rigidity required by the lubricating structure 10 , and the structural layer 12 is more preferable It is a metal material, the structural layer 12 and the self-moistening layer 11 are closely attached to form a piece, and the self-moistening layer 11 is facing inward and the structural layer 12 is the outside that will be closely attached to the structural layer 12 and the self-moistening layer 12. The lubricating layer 11 is bent into a non-circular annular tube body. In the embodiment of the present invention, the radial section of the lubricating structure 10 is a D-shaped ring. The D-shaped ring includes a straight edge, and the straight edge and the D-shaped The preferred ratio of the maximum diameter of the ring is between 1:1.5 and 1:3, and more preferably, the ratio of the straight edge to the maximum diameter of the D-shaped ring is 1:2.

3, 4 and 5, it is a preferred embodiment of the shock absorber 20 with a lubricating structure of the present invention. The shock absorber 20 with a lubricating structure includes more than one lubricating structure 10, an outer tube 21, A shaft rod 22 , an engaging member 24 and a damping device 23 . The outer tube 21 axially penetrates a tube inner hole 211 , the tube inner hole 211 includes two open ends, and the inner wall of one open end is spaced and combined with more than one lubricating structure 10 .

One end of the shaft rod 22 can be axially slid into the lubricating structure 10 , so that the shaft rod 22 passes through the outer tube 21 , and the outer peripheral surface of the shaft rod 22 is connected to the self-lubricating structure 10 . The layer 11 is closely attached, so that the shaft 22 can be prevented from rotating relative to the outer tube 21. In this embodiment, the shaft 22 and the lubricating structure 10 are a D-shaped structure corresponding to each other. A curved portion can maintain smooth axial movement of the shaft 22 relative to the outer tube 21 and the self-lubricating layer 11 ; a flat portion of the D-shaped structure can prevent the shaft 22 from rotating relative to the outer tube 21 , Compared with the shaft 22 and the lubricating structure 10 having a polygonal structure, the D-shaped structure can not only prevent the shaft 22 from rotating relative to the outer tube 21 , but also reduce the angle of the shaft 22 relative to the outer tube 21 . chance of getting stuck.

The end of the shaft 22 accommodated in the inner hole 211 of the tube has a threaded hole 221 recessed axially inward, and the other end of the shaft 22 is combined with a bicycle. The engaging member 24 is fixedly engaged with the inner side wall of the inner tube hole 211 , and the engaging member 24 axially penetrates a through hole 241 , and the engaging member 24 is preferably assembled to the inner tube hole in a non-welded manner. 211, in order to prevent the outer tube 21 from producing micro-changes and pre-defects, causing the outer tube 21 to be easily deformed and unfavorable for long-term use. In this embodiment, the engaging piece 24 is a steel flower piece. It includes two spacers and one or more fissures. The two spacers are arranged at an axial distance from each other and the concave curvature in the same direction is an arc. The two spacers are provided with more than one fissure at radial intervals. The outer diameter of the steel flower piece can be adjusted elastically, so that the outer diameters of the two gaskets are clamped with the outer tube.

The damping device 23 is compressibly and elastically assembled between the inner wall of the inner tube hole 211 and the shaft 22 with the end of the threaded hole 221 . The damping device 23 includes a spring 231 and a screw 232 . The spring 231 is accommodated in the inner hole 211 of the tube. One end of the spring 231 is detachably engaged with the shaft rod 22 , and the other end of the spring 231 abuts against the engaging member 24 . The screw 232 includes a threaded section 2321, which can be screwed with the threaded hole 221. The screw 232 passes through the through hole 241 and the spring 231 in sequence from the other open end of the inner tube hole 211, and finally connects with the threaded hole 221. The threaded holes 221 are screwed together to combine the shock absorber 20 with the lubricating structure.

Please refer to FIG. 6 , which is a sliding cross-sectional view of a preferred embodiment of the shock absorber 20 with a lubricating structure according to the present invention. The vibration and impact between the bicycle and the road surface when the bicycle is running cause the shock absorber with a lubricating structure. The shock 20 is in a compressed state, the shaft 22 slides axially toward the engaging member 24 and compresses the spring. The spring gives the shaft 22 a force in the opposite direction according to the inertia, so that the shaft 22 returns to its original relative position. at the position of the outer tube 21 .

Please refer to FIG. 7 , which is a second preferred embodiment of the shock absorber 20 with a lubricating structure according to the present invention. The thread 242, the thread segment 2321 of the screw 232 can be screwed with the thread 242. During assembly, the screw 232 to the shaft through hole 222 penetrates into the inner tube hole 211 and is screwed with the thread 242 to assemble the shock absorber 20 with a lubricating structure.

In a preferred embodiment of the present invention, one or more of the lubricating structures 10 arranged at intervals have a longer lubricating distance relative to the shaft 22, so that the shaft 22 can smoothly slide axially relative to the outer tube 21; if only using When there is a single lubricating structure 10 and the length of the single lubricating structure 10 is the same as that of the shaft rod 22 , the shaft rod 22 is completely covered by the single lubricating structure 10 , when riding the shock absorber 20 with the lubricating structure It is easy to be subjected to lateral force in a non-unidirectional direction, which causes the shaft 22 to rotate relative to the single lubricating structure 10, which further causes the angle to be stuck; When the length is smaller than the shaft rod 22, although the probability of angle jamming can be reduced between the lubricating structure 10 and the shaft rod 22, it cannot better maintain the sliding movement of the shaft rod 22 relative to the outer tube 21 when the shaft moves axially. Smooth stability also easily leads to wear of the lubricating structure 10 after long-term use.

The shock absorber 20 with lubricating structure of the present invention includes the following characteristics: 1. The lubricating structure 10 is formed by bending the self-lubricating layer 11 and the structural layer 12 in close contact with each other, so as to achieve the characteristics of low cost, simple structure and light load. 2. The lubricating characteristic material contained in the self-lubricating layer 11 does not need to be disassembled, cleaned and re-oiled regularly, and the rigid characteristic material contained in the structural layer 12 can provide protection and support to prevent the self-lubricating layer 11 from being affected. Cracks when impacted, so that the lubricating structure 10 increases the service life. . 3. The lubricating structure 10 and the shaft rod 22 corresponding to the D-shaped structure, the curved surface part of the D-shaped structure maintains the smoothness of the axial movement of the shaft rod 22 relative to the outer tube 21, and the D-shaped structure is The flat portion can prevent the shaft 22 from rotating relative to the outer tube 21, and reduce the probability of angle jamming caused by rotation. 4. The two or more lubricating structures 10 arranged at intervals have a longer lubrication distance relative to the shaft rod 22, so that the shaft rod 22 can smoothly slide axially relative to the outer tube 21, reducing the side effect caused by the non-unidirectional direction. The angle stuck caused by the force can also slow down the wear of the lubricating structure 10 after long-term use, and prolong the overall service life.

10: Lubrication structure 11: Self-moistening layer 12: Structural layer 20: Shock absorber with lubricated structure 21: Outer tube 211: Tube inner hole 22: Axle 221: threaded hole 24: Snaps 241: Perforation 242: Thread 23: Shock Absorber 231: Spring 232: Screw 2321: Threaded segment

1 is a perspective view of the appearance of a preferred embodiment of the lubricating structure of the present invention Figure 2 is a top view of a preferred embodiment of the lubricating structure of the present invention 3 is an exploded perspective view of a preferred embodiment of the present invention 4 is a cross-sectional view of a preferred embodiment of the present invention FIG. 5 is an enlarged view of a section of a preferred embodiment of the present invention. Fig. 6 is a sliding cross-sectional view of the present invention applied to a preferred embodiment 7 is a cross-sectional view of the second preferred embodiment of the lubricating structure of the present invention

10: Lubrication structure

11: Self-moistening layer

12: Structural layer

Claims (6)

A shock absorber with a lubricating structure, comprising: an outer tube, two or more lubricating structures are arranged at intervals on the inner sidewall of one end of the outer tube, each of the lubricating structures is a non-circular annular tube body, comprising: A self-lubricating layer and a structural layer, which provide the structural strength and rigidity required by the lubricating structure, the structural layer and the self-lubricating layer are closely attached to form a piece, with the self-lubricating layer facing inward and the structural layer being The outer side is bent into the non-circular annular pipe body; a shaft, one end of the shaft is placed in the lubricating structure to limit the rotation angle, the shape of the shaft corresponds to the lubricating structure, and the shaft can be tightly fitted The self-lubricating layer is axially movable; an engaging piece is fixedly engaged with the inner side wall of the outer tube; and a shock absorbing device is assembled between the engaging piece and the shaft rod During the time, the damping device includes a spring, one end of the spring is detachably engaged with the shaft rod, and the other end of the spring abuts against the engaging piece; wherein the radial section of the lubricating structure is a D-shaped A ring, the D-shaped ring includes a straight edge, and the preferred ratio of the straight edge to the maximum diameter of the D-shaped ring is between 1:1.5 and 1:3, the self-lubricating layer includes a Teflon, the structure The layer includes a metallic material. According to the shock absorber with lubricating structure according to claim 1, the ratio of the straight edge to the maximum diameter of the D-shaped ring is 1:2. The shock absorber with lubricating structure according to claim 1 or 2, wherein: the end of the shaft rod toward the inner hole of the tube is axially recessed inward with a threaded hole; the engaging member axially penetrates a a through hole; and a screw, the screw passes through the through hole and the spring in sequence, and is finally screwed with the threaded hole. The shock absorber with lubricating structure according to claim 1 or 2, wherein: the shaft axially penetrates a shaft through hole; the inner wall of the axial through hole of the engaging member is provided with a thread; and the screw Pass through the shaft hole and the spring in sequence, and finally screw with the thread. According to the shock absorber with lubricating structure according to claim 3, the engaging member is a steel rosette, and the steel rosette comprises: one or more spacers, and one or more of the spacers are arranged at an axial interval from each other and are identical to each other. The concave curvature in the direction is an arc; and one or more split grooves are radially arranged on two of the gaskets at intervals, and the outer diameter of the steel flower piece is clamped with the outer tube. The shock absorber with lubricating structure as claimed in claim 4, wherein the engaging member is a steel rosette, and the steel rosette comprises: one or more spacers, and one or more of the spacers are arranged at an axial distance from each other and are identical to each other. The concave curvature in the direction is an arc; and one or more split grooves are radially arranged on two of the gaskets at intervals, and the outer diameter of the steel flower piece is clamped with the outer tube.

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