WO2021163830A1

WO2021163830A1 - Bicycle and front fork shock absorber structure thereof

Info

Publication number: WO2021163830A1
Application number: PCT/CN2020/075492
Authority: WO
Inventors: 温文祥; 范扬平
Original assignee: 亚大国际企业股份有限公司
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2021-08-26

Abstract

A bicycle (2000) and a front fork shock absorber structure (1000) thereof. The front fork shock absorber structure (1000) is provided in a head tube (2100) of the bicycle (2000) and is connected to a front fork (2200), and comprises an upper bearing seat (1110), an inner tube (1120), four roller arrays (1130), a positioning shaft (1140), and an upper spring (1150). The upper bearing seat (1110) is movably accommodated in the head tube (2100), and the inner tube (1120) is movably accommodated in the head tube (2100); the upper end of the inner tube (1120) is connected to the upper bearing seat (1110), the lower end of the inner tube (1120) is connected to the front fork (2200), and the inner tube (1120) comprises four outer bearing surfaces (1121). The four roller arrays (1130) are accommodated in the head tube (2100), and the roller arrays (1130) correspond to respective outer bearing surfaces (1121); the positioning shaft (1140) is movably inserted into the inner tube (1120), a first end (1141) of the positioning shaft (1140) is limited in the inner tube (1120), and a second end (1142) of the positioning shaft (1140) is fixed to the head tube (2100). The upper spring (1150) is accommodated in the inner tube (1120) and is sleeved on the outer side of the positioning shaft (1140), and the upper spring (1150) is limited between the first end (1141) of the positioning shaft (1140) and the upper bearing seat (1110). The front fork (2200) is stressed to displace the positioning shaft (1140) relative to the inner tube (1120) so as to deform the upper spring (1150), thereby reducing discomfort caused by impact.

Description

Bicycle and its front fork shock absorber structure

Technical field

The invention relates to a bicycle and its shock absorber structure, and more particularly to a bicycle and its front fork shock absorber structure.

Background technique

In recent years, environmental protection and sports have become popular, and the utilization rate of bicycles has also been greatly increased. In order to increase the comfort of riding and the service life of bicycles, general bicycles are equipped with shock absorbers to respond to different road surface changes. The shock absorber function reduces the damage of the bicycle.

The known front fork shock absorber is installed on the head tube of the bicycle handle and connected to the base of the front fork. This kind of front fork shock absorber has an inner tube that can be displaced relative to the head tube, and a spring is provided in the inner tube to provide reset and return. Accumulation function.

However, when the impulse is too strong to be completely absorbed by the spring, the user will still feel the vibration, which is prone to discomfort. In view of this, how to effectively improve the structure of the front fork suspension device to reduce the discomfort caused by the impact has become the goal of the relevant industry.

Summary of the invention

The invention provides a bicycle and its front fork shock absorber structure, which can reduce discomfort caused by impact through structural configuration.

According to an implementation of an embodiment of the present invention, a front fork shock absorber structure is provided in the head tube of a bicycle and connected to the front fork. The front fork shock absorber structure includes an upper bearing seat, an inner tube, and four Roller row, positioning shaft and upper spring. The upper socket is movably accommodated in the head tube, the inner tube is movably accommodated in the head tube, the upper end of the inner tube is connected to the upper socket, the lower end of the inner tube is connected to the front fork, and the inner tube includes four outer bearing surfaces . Four roller rows are accommodated in the head tube, and each roller row corresponds to each outer bearing surface. The positioning shaft is movably inserted into the inner tube. The first end of the positioning shaft is limited to the inner tube. The two ends are fixed to the head tube. The upper spring is accommodated in the inner tube and sleeved on the outside of the positioning shaft. The upper spring is limited between the first end of the positioning shaft and the upper bearing seat. The front fork is forced to displace the positioning shaft relative to the inner tube to make the upper spring Deformed.

According to various embodiments of the aforementioned front fork shock absorber structure, the aforementioned front fork shock absorber structure further includes four linings, the four linings are housed in the head tube, and each lining corresponds to each roller row so that each The roller row is sandwiched between each lining and each outer bearing surface.

According to various embodiments of the aforementioned front fork shock absorber structure, the aforementioned front fork shock absorber structure further includes a center rod and a main spring. The center rod is accommodated in the inner tube, the center rod includes a top end abutting the first end of the positioning shaft, and the main spring is accommodated in the inner tube and sleeved on the center rod.

According to various embodiments of the aforementioned front fork shock absorber structure, the aforementioned front fork shock absorber structure further includes a lower buffer block, which is limited to one end of the main spring away from the center rod.

According to the foregoing multiple embodiments of the front fork shock absorber structure, the lower buffer block includes a plurality of outer ring recesses, and the plurality of outer ring recesses respectively limit a plurality of coils of the main spring.

According to various embodiments of the aforementioned front fork shock absorber structure, the aforementioned front fork shock absorber structure further includes a lower bearing, which is limited to the front fork and connected to the lower end of the inner tube, wherein the lower buffer block abuts against the lower bearing .

According to various embodiments of the aforementioned front fork shock absorber structure, the aforementioned front fork shock absorber structure further includes at least one spring pin located in at least one slot of the front fork, and the inner tube includes at least one outer groove located in the inner tube. At the lower end of the tube, the aforementioned at least one external embedding groove corresponds to the aforementioned at least one spring pin.

According to another embodiment of an embodiment of the present invention, a bicycle is provided, which includes a head tube, a dust cover fixing seat, a dust cover, a front fork, and a front fork shock absorber structure. The dust cover fixing seat is connected to one end of the head pipe and includes an inner ring groove, the dust cover is connected to the dust cover fixing seat, and the front fork is connected to the dust cover. The front fork shock absorber structure is arranged in the head tube and connected to the front fork. The front fork shock absorber structure includes an upper bearing seat, an inner tube, four roller rows, a positioning shaft, an upper spring and an oil seal. The upper socket is movably accommodated in the head tube, the inner tube is movably accommodated in the head tube, the upper end of the inner tube is connected to the upper socket, the lower end of the inner tube is connected to the front fork, and the inner tube includes four outer bearing surfaces . Four roller rows are accommodated in the head tube, and each roller row corresponds to each outer bearing surface. The positioning shaft is movably inserted into the inner tube. The first end of the positioning shaft is limited to the inner tube. The two ends are fixed to the head tube. The upper spring is housed in the inner tube and sleeved on the outside of the positioning shaft, the upper spring is limited between the first end of the positioning shaft and the upper bearing seat, and the oil seal is sleeved on the outer side of the inner pipe and is housed in the inner ring groove. Wherein, the front fork is forced to displace the positioning shaft relative to the inner tube to deform the upper spring.

According to the foregoing bicycle embodiments, the foregoing front fork shock absorber structure further includes a center rod and a main spring. The center rod is accommodated in the inner tube, the center rod includes a top end abutting the first end of the positioning shaft, and the main spring is accommodated in the inner tube and sleeved on the center rod.

According to various embodiments of the aforementioned bicycle, the aforementioned front fork shock absorber structure further includes a lower buffer block, which is limited to one end of the main spring away from the central rod.

Compared with the prior art, the bicycle and its front fork shock absorber structure of the present invention can increase the resistance of the relative displacement between the positioning shaft and the inner tube through the deformation of the upper spring and reduce the discomfort caused by rapid impact. .

Description of the drawings

FIG. 1 is a partial three-dimensional schematic diagram of a front fork shock absorber structure installed on a bicycle according to an embodiment of the present invention;

FIG. 2 is a partially exploded schematic diagram of the front fork shock absorber structure and the bicycle in the embodiment of FIG. 1; FIG.

3 is a schematic cross-sectional view of a part of the front fork shock absorber structure and the bicycle in the embodiment of FIG. 1;

4 is a schematic cross-sectional view of another part of the front fork shock absorber structure of the embodiment of FIG. 1 and the bicycle;

Fig. 5 is a schematic partial cross-sectional view of the front fork shock absorber structure of the embodiment of Fig. 3 and the bicycle along the cutting plane line 5-5; and

6 is a schematic partial cross-sectional view of the front fork shock absorber structure of the embodiment of FIG. 3 and the bicycle along the cutting plane line 6-6.

Description of Reference Signs

1000-Front fork shock absorber structure, 1110-upper bearing, 1120-inner tube, 1121-outer bearing surface, 1122-outer groove, 1130-roller row, 1140-positioning shaft, 1141-first end, 1142-second end, 1150-upper spring, 1160-lining, 1170-center rod, 1171-top, 1172-bottom, 1180-main spring, 1190-lower buffer block, 1191-outer ring concave, 1200-lower Socket, 1210-fixed ring, 1230-upper abutment ring, 1240-lower abutment ring, 1250-spring pin, 1260-oil seal, 2000-bicycle, 2100-head tube, 2110-slot, 2200-front fork, 2210- card slot, 2300- dust cover holder, 2310- inner ring groove, 2400- dust cover.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings. For the sake of clarity, many practical details will be explained in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some well-known and customary structures and elements will be drawn in a simple schematic manner in the drawings; and repeated elements may be represented by the same or similar numbers.

In addition, when an element (or mechanism or module, etc.) is "connected", "disposed" or "coupled" to another element in this document, it can mean that the element is directly connected, directly disposed or directly coupled to another element, It can also mean that an element is indirectly connected, indirectly disposed, or indirectly coupled to another element, that is, there are other elements between the element and another element. When it is clearly stated that an element is "directly connected", "directly arranged" or "directly coupled" to another element, it means that no other element is between the element and another element. The terms first, second, third, etc. are only used to describe different elements or components, and there are no restrictions on the elements/components themselves. Therefore, the first element/component can also be referred to as the second element/component. Moreover, the combination of components/components/mechanisms/modules in this article is not a commonly known, conventional or well-known combination in this field. It is not possible to judge whether the combination relationship is easy to be technically based on whether the component/component/mechanism/module itself is well-known. It can be done easily by ordinary knowledgeable persons in the field.

Please refer to FIGS. 1, 2 and 3, in which FIG. 1 shows a partial perspective view of a front fork shock absorber structure 1000 disposed on a bicycle 2000 according to an embodiment of the present invention, and FIG. 2 shows the embodiment of FIG. 1 A partial exploded schematic view of the front fork shock absorber structure 1000 and the bicycle 2000. FIG. 3 is a partial cross-sectional schematic view of the front fork shock absorber structure 1000 and the bicycle 2000 of the embodiment in FIG. 1. The front fork shock absorber structure 1000 is arranged in the head tube 2100 of the bicycle 2000 and connected to the front fork 2200. The front fork shock absorber structure 1000 includes an upper bearing 1110, an inner tube 1120, four roller rows 1130, and a positioning shaft 1140 And the upper spring 1150.

The upper socket 1110 is movably accommodated in the head tube 2100, the inner tube 1120 is movably accommodated in the head tube 2100, the upper end (not labeled) of the inner tube 1120 is connected to the upper socket 1110, and the lower end of the inner tube 1120 (not labeled) ) Connect the front fork 2200, and the inner tube 1120 includes four outer bearing surfaces 1121. Four roller rows 1130 are accommodated in the head tube 2100, and each roller row 1130 corresponds to each outer bearing surface 1121, the positioning shaft 1140 is movably inserted into the inner tube 1120, and the first end 1141 of the positioning shaft 1140 is limited to In the inner tube 1120, the second end 1142 of the positioning shaft 1140 is fixed to the head tube 2100. The upper spring 1150 is accommodated in the inner tube 1120 and sleeved on the outside of the positioning shaft 1140. The upper spring 1150 is limited between the first end 1141 of the positioning shaft 1140 and the upper bearing 1110. The front fork 2200 is forced to make the positioning shaft 1140 The inner tube 1120 is displaced relative to the inner tube 1120 to deform the upper spring 1150.

Thereby, through the deformation and accumulating force of the upper spring 1150, the resistance to the relative displacement between the positioning shaft 1140 and the inner tube 1120 can be increased, and the discomfort caused by the rapid impact can be reduced. The details of the front fork suspension structure 1000 will be detailed later.

The head tube 2100 and the front fork 2200 are well-known structures and are not the focus of this case, and the details will not be repeated. The inner tube 1120 is generally cylindrical and may contain a cylindrical space (not marked). The outer wall of the front half of the inner tube 1120 can be formed with four outer bearing surfaces 1121 with a planar structure, and the four outer bearing surfaces 1121 are equally spaced from each other. arrangement. Each roller row 1130 may include a plurality of rollers (not labeled) arranged along an axial direction of the inner tube 1120. When the inner tube 1120 is displaced relative to the head tube 2100, the rollers can be rotated by force, thereby enhancing the sliding of the inner tube 1120 Smoothness.

The positioning shaft 1140 is inserted downward from the upper end of the inner tube 1120, so the first end 1141 of the positioning shaft 1140 is located in the cylindrical space of the inner tube 1120, and the second end 1142 of the positioning shaft 1140 is located outside the inner tube 1120. The front fork shock absorber structure 1000 may further include a fixing ring 1210 and a nut (not labeled) located in the head tube 2100 and screwed on the second end 1142 of the positioning shaft 1140, and then a plurality of screws (not labeled) can be The fixing ring 1210 is locked on the head tube 2100 to fix the positioning shaft 1140 to the head tube 2100.

The front fork shock absorber structure 1000 may include an upper abutment ring 1230 and a lower abutment ring 1240. The upper abutment ring 1230 is fixed to the upper end of the inner tube 1120, and the lower abutment ring 1240 is fixed to the first end 1141 of the positioning shaft 1140. The upper spring 1150 can be connected between the upper abutment ring 1230 and the lower abutment ring 1240.

The front fork shock absorber structure 1000 may further include a center rod 1170 and a main spring 1180. The center rod 1170 is accommodated in the inner tube 1120, the center rod 1170 includes a top end 1171 abutting the first end 1141 of the positioning shaft 1140, and the main spring 1180 is accommodated in the inner tube 1120 and sleeved on the center rod 1170. The center rod 1170 and the positioning shaft 1140 abut each other, and the main spring 1180 has a compression spring structure. Therefore, when the inner tube 1120 and the center rod 1170 are relatively displaced, the center rod 1170 can be pressed against the main spring 1180 to deform and accumulate force.

The front fork shock absorber structure 1000 may further include a lower buffer block 1190, which is limited to one end of the main spring 1180 away from the center rod 1170. The lower buffer block 1190 may include a plurality of outer ring recesses 1191, and the plurality of outer ring recesses 1191 can respectively limit a plurality of coils (not labeled) of the main spring 1180. In addition, the front fork shock absorber structure 1000 further includes a lower bearing 1200, which is limited to the front fork 2200 and connected to the lower end of the inner tube 1120, and the lower buffer block 1190 can abut the lower bearing 1200. Specifically, the front fork 2200 includes an accommodating hole (not labeled), the lower bearing 1200 is fixed in the accommodating hole, and the inner tube 1120 can be connected between the upper bearing 1110 and the lower bearing 1200. The lower buffer block 1190 may be made of an elastic material. The lower buffer block 1190 is fixed on the lower bearing 1200 and is located at the lower end of the inner tube 1120, and the outer wall of the lower buffer block 1190 is concave and convex to form a plurality of outer walls. The ring recess 1191, whereby part of the coil of the main spring 1180 can be sleeved on the outer ring recess 1191, so that the main spring 1180 and the lower buffer block 1190 are connected.

Please refer to FIG. 4. FIG. 4 is a schematic cross-sectional view of another part of the front fork shock absorber structure 1000 and the bicycle 2000 in the embodiment of FIG. 1. In FIG. 4, the front fork 2200 is displaced upward by an external force, which drives the head tube 2100 to move upward relative to the inner tube 1120, so the positioning shaft 1140 and the center rod 1170 displace downward relative to the inner tube 1120 in positional relationship. At this time, the main spring 1180 is compressed by the central rod 1170 to absorb the external force, and if the external force is too large, the main spring 1180 is completely compressed, the bottom end 1172 of the central rod 1170 will press against the lower buffer block 1190 to reduce the impulse. At the same time, the upper spring 1150 is stretched by the positioning shaft 1140, and resistance is generated to slow down the displacement speed of the positioning shaft 1140 and the center rod 1170, which can also reduce the impulse, and reduce the discomfort caused by the impulse, while achieving the effect of noise reduction.

Please refer to FIG. 5, where FIG. 5 is a schematic partial cross-sectional view of the front fork shock absorber structure 1000 and the bicycle 2000 in the embodiment of FIG. 3 along the cutting plane line 5-5. The front fork shock absorber structure 1000 further includes at least one spring pin 1250, which is located in at least one slot 2210 of the front fork 2200, the inner tube 1120 includes at least one outer groove 1122 located at the lower end of the inner pipe 1120, and at least one outer groove 1122 corresponds to the spring pin 1250. The number of the outer embedding groove 1122 can be two and is formed by the diameter reduction of the outer wall of the inner tube 1120, and the number of the clamping groove 2210 is also two and is formed by the diameter reduction of the inner wall of the accommodating hole of the front fork 2200. The outer embedding groove 1122 and the card The grooves 2210 can be opposed to each other and form an accommodating space for the spring pin 1250 to accommodate, so as to increase the structural stability, but the present invention is not limited by this.

Please refer to FIG. 6, and also refer to FIG. 2, in which FIG. 6 is a schematic partial cross-sectional view of the front fork shock absorber structure 1000 and the bicycle 2000 in the embodiment of FIG. 3 along the cutting plane line 6-6. The front fork shock absorber structure 1000 also includes four linings 1160. The four linings 1160 are accommodated in the head tube 2100. Each lining 1160 corresponds to each roller row 1130, so that each roller row 1130 is sandwiched between each lining. Between the sheet 1160 and each outer bearing surface 1121. As shown in FIG. 6, the head tube 2100 may include four pockets 2110 to correspond to four roller rows 1130 and four linings 1160. It can be seen from Figure 6 that when the inner tube 1120 includes four outer bearing surfaces 1121 with four roller rows 1130, four linings 1160 and four pockets 2110, the inner tube 1120 can only move axially relative to the head tube 2100 , And has an anti-rotation effect.

Please refer to Figures 2 and 3 again. The bicycle 2000 may also include a dust cover holder 2300 and a dust cover 2400. The dust cover holder 2300 is connected to one end of the head tube 2100 and includes an inner ring groove 2310 and a dust cover 2400. Connect the dust cover fixing seat 2300, and the front fork 2200 connect the dust cover 2400. The front fork shock absorber structure 1000 may further include an oil seal 1260 which is sleeved on the outside of the inner tube 1120 and is accommodated in the inner ring groove 2310. In this way, the anti-fouling effect can be improved.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to those defined in the claims.

Claims

A front fork shock absorber structure, which is arranged in the head tube of a bicycle and connected to the front fork, characterized in that the front fork shock absorber structure includes:

The upper bearing seat is movably accommodated in the head tube;

The inner tube is movably accommodated in the head tube, the upper end of the inner tube is connected to the upper bearing, the lower end of the inner tube is connected to the front fork, and the inner tube includes four outer bearings noodle;

Four roller rows are accommodated in the head tube, and each of the roller rows corresponds to each of the outer bearing surfaces;

A positioning shaft movably inserted in the inner tube, a first end of the positioning shaft is located in the inner tube, and a second end of the positioning shaft is fixed to the head tube; and

An upper spring accommodated in the inner tube and sleeved outside the positioning shaft, the upper spring is limited between the first end of the positioning shaft and the upper bearing seat;

Wherein, the front fork is forced to displace the positioning shaft relative to the inner tube, so as to deform the upper spring.
The front fork shock absorber structure of claim 1, further comprising:

Four linings are housed in the head tube, each of the linings corresponds to each of the roller rows, so that each of the roller rows is clamped between each of the linings and each of the outer bearing surfaces between.
The front fork shock absorber structure of claim 1, further comprising:

A center rod accommodated in the inner tube, the center rod including the first end with a top end abutting the positioning shaft; and

The main spring is accommodated in the inner tube and sleeved on the center rod.
The front fork shock absorber structure of claim 3, further comprising:

The lower buffer block is limited to one end of the main spring away from the central rod.
The front fork shock absorber structure of claim 4, wherein the lower buffer block comprises:

A plurality of outer ring recesses respectively limit a plurality of coils of the main spring.
The front fork shock absorber structure of claim 4, further comprising:

A lower bearing, limited to the front fork and connected to the lower end of the inner tube;

Wherein, the lower buffer block abuts against the lower bearing seat.
The front fork shock absorber structure of claim 1, further comprising at least one spring pin, which is located in at least one slot of the front fork, and the inner tube includes at least one outer groove located in the At the lower end of the inner tube, the at least one outer embedding groove corresponds to the at least one spring pin.
A bicycle, characterized in that it contains:

Head tube

The dust cover fixing seat is connected to one end of the head tube and includes an inner ring groove;

Dust cover, connected to the dust cover fixing seat;

The front fork is connected to the dust cover; and

The front fork shock absorber structure is arranged in the head tube and connected to the front fork, and the front fork shock absorber structure includes:

The upper bearing seat is movably accommodated in the head tube;

The inner tube is movably accommodated in the head tube, the upper end of the inner tube is connected to the upper bearing, the lower end of the inner tube is connected to the front fork, and the inner tube includes four outer bearings noodle;

Four roller rows are accommodated in the head tube, and each of the roller rows corresponds to each of the outer bearing surfaces;

A positioning shaft movably inserted in the inner tube, a first end of the positioning shaft is located in the inner tube, and a second end of the positioning shaft is fixed to the head tube;

The upper spring is accommodated in the inner tube and sleeved on the outside of the positioning shaft, and the upper spring is limited between the first end of the positioning shaft and the upper bearing seat; and

An oil seal, sleeved on the outside of the inner tube and accommodated in the inner ring groove;

Wherein, the front fork is forced to displace the positioning shaft relative to the inner tube, so as to deform the upper spring.
The bicycle according to claim 8, wherein the front fork shock absorber structure further comprises:

A center rod accommodated in the inner tube, the center rod including the first end with a top end abutting the positioning shaft; and

The main spring is accommodated in the inner tube and sleeved on the center rod.
The bicycle of claim 9, wherein the front fork shock absorber structure further comprises:

The lower buffer block is limited to one end of the main spring away from the central rod.