TWI836878B - Bicycle front shock absorber structure - Google Patents

Abstract

The invention discloses a front shock absorber structure for a bicycle, comprising: a front fork upper frame, two fork tubes, a bridge component and a damping unit. The front fork upper frame comprises a front fork crown and a front fork vertical tube extending upward. The front fork crown is provided with a sliding hole on both sides respectively. The front fork vertical tube is provided with a hollow hole along the axial direction. The two fork tubes are respectively passed through the sliding holes on both sides of the front fork crown from bottom to top. The bridge component is arranged between the two fork tubes. The damping unit is arranged in the hollow hole of the front fork vertical tube and protrudes downward to expose a section outside the hollow hole and is connected to the bridge component. Therefore, not only the shock absorption stability is good, but also the structure is simple, the assembly is easy and fast, and the manufacturing cost is low.

Description

Bicycle front shock absorber structure

The invention relates to a bicycle structure, in particular to a bicycle front shock absorber structure.

Bicycles are becoming more and more popular in today's society. In addition to being a basic means of transportation, bicycles also have the characteristics of leisure, sports and environmental protection. They are more in line with modern people's high attention to leisure life, fitness and environmental protection, making bicycles gradually loved and widely used by modern people. In order to cushion the impact transmitted by the front wheel, bicycles (especially mountain bikes) are usually equipped with front shock absorbers to provide shock absorption effects and obtain better riding comfort.

Generally, a bicycle front shock absorber is equipped with a shock absorbing structure on a front fork. The front fork includes a front fork standpipe, a front fork crown cover provided at the lower end of the front fork riser tube, and a front fork crown cap coupled to both sides of the front fork crown. Bifurcated tube, the shock absorber structure is arranged on the front fork vertical tube or the bifurcated tube to form a single-cylinder shock absorber or a double-cylinder shock absorber.

However, the shock absorber structure is a monotube shock absorber installed on the front fork riser. Its shock absorber stability is poor, which easily leads to safety problems, and the service life and practicality are reduced. In addition, the shock absorber structure is installed on the front fork riser. The double-tube shock absorber of the front fork riser tube has many components, the assembly operation is cumbersome and time-consuming, the manufacturing cost is high, and it is not economical.

In view of the above-mentioned shortcomings of conventional bicycle front shock absorbers, the inventor came up with the idea of creation, and after many discussions and sample tests, as well as many corrections and improvements, he came up with the present invention.

The invention provides a bicycle front shock absorber structure, which includes: a front fork upper frame, including a front fork crown cover. An upwardly extending front fork vertical tube is provided in the middle of the front fork crown cover. Both sides of the front fork crown cover are respectively There is a sliding hole, and the front fork vertical tube is provided with a penetrating hollow hole along the axial direction; the two fork tubes are respectively installed in the sliding holes on both sides of the front fork shoulder seat from bottom to top, and can slide up and down along the sliding hole. ; A bridge member is provided between the two fork tubes and is located below the front crown seat. A first connecting portion aligned with the hollow hole is provided in the middle of the bridge member; and a damping unit is assembled on The damping unit is provided with a second connecting portion at its lower end, and is connected to the first connecting portion of the bridge member by the second connecting portion. , the exposed section of the damping unit forms a shock-absorbing distance, which is used to form the damping force when the bifurcated tube slides upward along the sliding holes on both sides of the front fork shoulder seat, thereby providing a stable shock-absorbing effect.

The main purpose of the bicycle front shock absorber structure of the present invention is that it not only has good shock absorber stability, but also has a simple structure, easy and fast assembly, and low manufacturing cost.

The following is a further description of the preferred embodiments of the present invention in conjunction with the drawings, so that those familiar with the relevant technology of the present invention can implement it according to the description of this specification.

First, please refer to the first to third figures. A bicycle front shock absorber structure of the present invention includes: a front fork upper frame 10, a bifurcated tube 20, a bridge 30, a damping unit 40, and a lock. Device 50, a dust cover 60 and two elastic members 70.

The front fork upper frame 10 includes a front fork crown 11, a front fork vertical tube 12 extending upward is arranged in the middle of the front fork crown 11, a sliding hole 111 is respectively arranged on both sides of the front fork crown 11, a bearing 112 is respectively installed in each of the sliding holes 111, and the front fork vertical tube 12 is axially provided with a through hollow hole 121, and the upper end of the front fork vertical tube 12 is used to be connected to the handlebar of the bicycle. In this embodiment, the bearing 112 is a self-lubricating bearing.

The two-pronged tube 20 is respectively passed through the bearings 112 of the sliding holes 111 on both sides of the front fork shoulder seat 11 from bottom to top, so that the two-pronged tube 20 can slide up and down along the sliding holes 111 on both sides of the front fork shoulder seat 11, and the bearings 112 make the up and down sliding of the two-pronged tube 20 smoother. A hook 21 is respectively provided at the lower end of the two-pronged tube 20, and the two hooks 21 are used for the front wheel hinge assembly of the bicycle. A cover 22 is respectively provided at the upper end of the two-pronged tube 20.

The bridge member 30 is disposed between the two fork tubes 20 and is located below the front fork crown 11. A first connecting portion 31 is provided in the middle of the bridge member 30 and is aligned with the hollow hole 121. A tie ring 32 is provided on each side of the bridge member 30. The two tie rings 32 are used to tie and fix the two fork tubes 20, and the position height of the bridge member 30 can be adjusted according to usage needs.

The damping unit 40 is assembled in the hollow hole 121 of the front fork vertical tube 12, and extends downward for a section outside the hollow hole 121. A second connecting portion 41 is provided at the lower end of the damping unit 40. The connecting portion 41 is connected to the first connecting portion 31 of the bridge member 30 . The exposed section of the damping unit 40 forms a shock absorbing distance H1 to form the fork tube 20 sliding along both sides of the front fork crown seat 11 . The damping force when the hole 111 slides upward provides a stable shock-absorbing effect. In this embodiment, the first connecting part 31 is a screw hole, the second connecting part 41 is a stud, and the second connecting part 41 and The connecting part 31 is screwed, and the damping unit 40 is a hydraulic cylinder, a pneumatic cylinder or a spring.

The locking device 50 is disposed at the top of the front fork vertical tube 12 and is assembled and combined with the upper end of the damping unit 40. The locking device 50 is a well-known component of the front shock absorber of a bicycle and will not be described in detail here. When the front wheel of the bicycle does not need shock absorption, the locking device 50 can be operated to lock the damping unit 40 so that the damping unit 40 does not provide a buffering effect, thereby improving the convenience of use.

The dustproof cover 60 is retractable and is sleeved on a section of the damping unit 40 protruding outward from the hollow hole 121 and is located between the front fork crown 11 and the bridge member 30 to achieve a dustproof effect.

The two elastic members 70 are respectively sleeved on the two fork tubes 20 and respectively elastically resist between the front fork crown 11 and the bridge member 30 to achieve an auxiliary shock-absorbing effect. In this embodiment, the elastic members 70 are springs.

In use, as shown in the fourth figure, when the bicycle travels on a bumpy road, the bifurcated tube 20 together with the bridge member 30 moves up and down in a reciprocating manner, absorbing its vibration through the compression deformation and elastic expansion of the damping unit 40, providing a buffering and shock-absorbing effect. At the same time, the bifurcated tube 20 slides up and down along the sliding holes 111 on both sides of the front crown seat 11 to obtain a guiding and stabilizing effect. The dust boot 60 compresses and expands along with the damping unit 40 .

The structure of the above specific embodiment can obtain the following benefits:

In the bicycle front shock absorber structure of the present invention, the damping unit 40 is assembled in the hollow hole 121 of the front fork riser 12. During use, the damping unit 40 uses the compression deformation and elastic expansion to provide a buffering and shock absorbing effect. The bifurcated tube 20 slides up and down along the sliding holes 111 on both sides of the front fork shoulder seat 11 to provide a guiding and stabilizing effect. The Bida shock absorber has good stability, has a simple structure, is easy and fast to assemble, has low manufacturing cost, and is economical.

10: Put the front fork on the rack 11: Front fork shoulder cover 111: Sliding hole 112:Bearing 12: Front fork riser tube 121: Hollow hole 20:Fork tube 21:Hook 22:Block 30:Bridge piece 31: First connection part 32:Beam ring 40: Damping unit 41: Second connection part 50: Locking device 60:Dust jacket 70: Elastic parts H1: shock absorber distance

The first figure is a three-dimensional diagram of the present invention. The second figure is a three-dimensional exploded diagram of the present invention. The third figure is a cross-sectional schematic diagram of the present invention. The fourth figure is a schematic diagram of the shock-absorbing action of the present invention.

10: Front fork mounting

11: Front fork crown

111: Sliding hole

112:Bearing

12: Front fork vertical tube

121: Hollow hole

20:Fork tube

22: Capping

30:Bridge piece

31: First connection part

32:Beam ring

40: Damping unit

41: Second connection part

50: Locking device

60: Dustproof cover

70: Elastic parts

Claims (9)

A bicycle front shock absorber structure comprises: a front fork upper frame, comprising a front fork crown, a front fork vertical tube extending upward is arranged in the middle of the front fork crown, a sliding hole is arranged on both sides of the front fork crown, a bearing is installed in each of the sliding holes on both sides of the front fork crown, and a hollow hole is arranged along the axial direction of the front fork vertical tube; two fork tubes are respectively arranged from bottom to top through the sliding holes on both sides of the front fork crown, and the two fork tubes are arranged with the bearings so as to slide up and down along the sliding holes; a bridge member is arranged between the two fork tubes, and Located below the front fork shoulder, the middle position of the bridge is provided with a first connection portion aligned with the hollow hole; and a damping unit is assembled in the hollow hole of the front fork vertical tube and protrudes downward to expose a section outside the hollow hole. The lower end of the damping unit is provided with a second connection portion, and the second connection portion is connected to the first connection portion of the bridge. The protruding section of the damping unit forms a shock-absorbing distance to form a damping force when the two-fork tube slides upward along the sliding holes on both sides of the front fork shoulder, providing a stable shock-absorbing effect. The bicycle front shock absorber structure as claimed in claim 1, wherein the bearing is a self-lubricating bearing. As described in claim 1, the front shock absorber structure of a bicycle, wherein a tie ring is provided on each side of the bridge component, and the two tie rings are tied to the two fork tubes for fixing, and the position height of the bridge component can be adjusted according to the use requirements. The bicycle front shock absorber structure according to claim 1, wherein the first connecting part is a screw hole, the second connecting part is a stud, and the second connecting part is connected to the connecting rod. Screw joint connection. The bicycle front shock absorber structure as described in claim 1, wherein the damping unit is a hydraulic cylinder, a pneumatic cylinder or a spring. The bicycle front shock absorber structure as described in claim 1 further includes a locking device, which is arranged at the top of the front fork vertical tube and is assembled and combined with the upper end of the damping unit. When the shock absorber is not needed, the locking device is operated to lock the damping unit so that the damping unit does not provide a buffering effect. The bicycle front shock absorber structure as described in claim 1 further comprises a dust cover, which is retractable and is mounted on a section of the damping unit protruding outside the hollow hole, and is located between the front fork crown and the bridge member. The bicycle front shock absorber structure as described in claim 1, wherein the upper ends of the two fork tubes are each provided with a sealing cover. The bicycle front shock absorber structure as claimed in claim 1, further comprising two elastic members, the two elastic members are respectively sleeved on the two fork tubes and respectively spring against the front fork shoulder cover and the bridge member. time to achieve the auxiliary shock-absorbing effect.

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