CN-117227884-B - Rear shock-absorbing frame structure of bicycle

CN117227884BCN 117227884 BCN117227884 BCN 117227884BCN-117227884-B

Abstract

The application provides a rear shock-absorbing frame structure of a bicycle, which comprises a frame body, a rear upper fork, a rear lower fork and a shock-absorbing connecting rod. One end of the rear upper fork is rotationally connected with the frame body. One end of the rear lower fork and the other end of the rear upper fork are in transmission fit with a first rotating shaft of the rear wheel. The shock-absorbing connecting rod is positioned below the rear upper fork and is rotationally connected with the frame body, and one end of the shock-absorbing connecting rod is movably connected with the other end of the rear lower fork. One end of the shock absorber is rotationally connected with the frame body, and the other end of the shock absorber is rotationally connected with the other end of the shock absorbing connecting rod. When the bicycle rear shock-absorbing frame structure is ridden, a person steps on a pedal, the chain drives the rear wheel to descend, the rear wheel drives the shock-absorbing connecting rod to rotate through the cooperation of the rear upper fork and the rear lower fork, the shock-absorbing connecting rod pushes the shock absorber to rebound, so that the frame body ascends, the frame body is mutually offset from top to bottom, the frame body is ensured to be kept stable in the riding process, the movement amplitude of the frame body is reduced, the unloading force is reduced, and the riding efficiency is improved.

Inventors

MO YIPING
LIANG ZHIBIN
HAN DEWEI

Assignees

大行科工(深圳)股份有限公司

Dates

Publication Date: 20260508
Application Date: 20231027

Claims (8)

1. A rear shock absorbing frame structure for a bicycle, comprising: A frame body; A rear upper fork, wherein one end of the rear upper fork is rotationally connected with the frame body; One end of the rear lower fork and the other end of the rear upper fork are both used for being in transmission fit with a first rotating shaft of the rear wheel; A shock-absorbing connecting rod which is positioned below the rear upper fork and is rotationally connected with the frame body, one end of the shock-absorbing connecting rod is movably connected with the other end of the rear lower fork, and The shock absorber is characterized in that one end of the shock absorber is rotationally connected with the frame body, and the other end of the shock absorber is rotationally connected with the other end of the shock absorbing connecting rod; the bicycle frame comprises a bicycle frame body, wherein a middle shaft hole is formed in the bicycle frame body, a first connecting seat is arranged on the outer side wall of the middle shaft hole, the shock absorbing connecting rod extends along the arc direction, a connecting portion is arranged on one side, close to the middle shaft hole, of the shock absorbing connecting rod, the connecting portion is in rotary connection with the first connecting seat, and the outer side wall of the connecting portion is in rolling fit with the outer side wall of the middle shaft hole.
2. The bicycle rear shock absorbing frame structure according to claim 1, wherein the two rear upper forks, the two rear lower forks and the shock absorbing connecting rods are respectively arranged on two opposite sides of the frame body.
3. The bicycle rear shock-absorbing frame structure according to claim 2, wherein one ends of the two shock-absorbing connecting rods, which are far away from the shock absorber, are respectively provided with a sliding part, and one ends of the two rear bottom forks, which are far away from the first rotating shaft, are correspondingly matched with the two sliding parts in a sliding way.
4. The rear shock absorbing frame structure of claim 3, wherein the two sliding parts are respectively provided with a sliding groove, the rear shock absorbing frame structure of the bicycle further comprises a sliding rod, the sliding rod penetrates through the two sliding grooves and is respectively in sliding fit with the two sliding grooves, and two ends of the sliding rod are correspondingly connected with one ends of the two rear lower forks, which are far away from the first rotating shaft.
5. The rear shock-absorbing frame structure of claim 2, further comprising a second rotating shaft, wherein two ends of the second rotating shaft are correspondingly connected with one ends of the two shock-absorbing connecting rods, which are close to the shock absorber, a first shaft hole is formed in one end of the shock absorber, which is close to the shock-absorbing connecting rods, and the second rotating shaft penetrates through the first shaft hole.
6. The bicycle rear shock absorbing frame structure of claim 5, wherein the frame body comprises a down tube, the down tube is provided with a second connecting seat, and the second connecting seat is rotatably connected with one end of the shock absorber away from the shock absorbing connecting rod.
7. The bicycle rear shock absorbing frame structure according to claim 2, wherein a third connecting seat is arranged on one side of the frame body, which is close to the rear wheel, and is provided with a second shaft hole, the bicycle rear shock absorbing frame structure further comprises a third rotating shaft, the third rotating shaft penetrates through the second shaft hole, and two ends of the third rotating shaft are correspondingly connected with two ends of the rear upper forks, which are far away from the first rotating shaft.
8. The bicycle rear shock frame structure according to any one of claims 1 to 7, further comprising a hook claw, wherein an end of the rear upper fork away from the frame body and an end of the rear lower fork away from the shock connecting rod are fixedly connected with the hook claw.

Description

Rear shock-absorbing frame structure of bicycle Technical Field The invention relates to the technical field of bicycles, in particular to a rear shock-absorbing frame structure of a bicycle. Background Currently, bicycles on the market all include shock absorbing frames. However, when a person sits on the bicycle, the weight of the person presses down the frame, so that the frame descends downwards; meanwhile, when riding, a person steps on the pedal, so that the chain drives the rear wheel to lift upwards, the frame descends, the two phases of the frame are overlapped to cause the frame to be softer, the force is too much during riding, and the riding efficiency is low. Disclosure of Invention Based on this, it is necessary to provide a rear shock-absorbing frame structure of a bicycle, which aims at the problems of the prior art that the frame of the bicycle is soft, the unloading force is too much during the riding process, and the riding efficiency is low. The technical scheme is as follows: In one aspect, a rear shock absorbing frame structure for a bicycle is provided, comprising: A frame body; A rear upper fork, wherein one end of the rear upper fork is rotationally connected with the frame body; One end of the rear lower fork and the other end of the rear upper fork are both used for being in transmission fit with a first rotating shaft of the rear wheel; A shock-absorbing connecting rod which is positioned below the rear upper fork and is rotationally connected with the frame body, one end of the shock-absorbing connecting rod is movably connected with the other end of the rear lower fork, and And one end of the shock absorber is rotationally connected with the frame body, and the other end of the shock absorber is rotationally connected with the other end of the shock absorbing connecting rod. In the rear shock-absorbing frame structure of the bicycle in the above embodiment, when a person sits on the bicycle, the weight of the person can press down the frame body, so that the frame body descends. Compared with the shock-absorbing frame in the prior art, the shock-absorbing turning point is positioned at the joint of the rear upper fork and the frame body, namely the shock-absorbing turning point moves upwards, so that the squat-reversing value of the rear shock-absorbing frame structure of the bicycle is increased, further, when the bicycle is ridden, a user steps on a pedal, the rear wheel is driven to descend by a chain, the rear wheel drives the shock-absorbing connecting rod to rotate through the cooperation of the rear upper fork and the rear lower fork, and the shock-absorbing connecting rod pushes the shock absorber to rebound, so that the frame body ascends and counteracts one another, the frame body is ensured to be kept stable in the riding process, the movement amplitude of the frame body is reduced, the unloading force is reduced, and the riding efficiency is greatly improved. In addition, when riding on bad road surface, the thrust direction of the shock-absorbing connecting rod to the shock absorber is different from the impact force direction of the frame body to the shock absorber, the shock absorbing effect of the rear shock-absorbing frame structure of the bicycle is not affected, and the reliability of the rear shock-absorbing frame structure of the bicycle is improved. The technical scheme is further described as follows: In one embodiment, the frame body is provided with a middle shaft hole, the outer side wall of the middle shaft hole is provided with a first connecting seat, the first connecting seat is provided with a third shaft hole, the shock absorbing connecting rods extend along the arc direction, one sides of the two shock absorbing connecting rods close to the middle shaft hole are provided with connecting parts, the rear shock absorbing frame structure of the bicycle further comprises a fourth rotating shaft, the fourth rotating shaft penetrates through the third shaft hole, and two ends of the fourth rotating shaft are correspondingly connected with the two connecting parts. Therefore, the convenience of assembling the rear shock-absorbing frame structure of the bicycle is improved. In one embodiment, the outer side wall of the connecting part is in rolling fit with the outer side wall of the center shaft hole. Therefore, the frame body and the shock-absorbing connecting rod cannot interfere, and the reliability of the rear shock-absorbing frame structure of the bicycle is improved. In one embodiment, the two upper rear forks, the two lower rear forks and the shock absorbing connecting rods are respectively arranged at two opposite sides of the frame body. So, go up fork, rear lower fork and connecting rod of moving away to avoid possible earthquakes can form connecting rod transmission structure with the frame body cooperation, through setting up two connecting rod transmission structure, guarantee that the frame body can receive sufficient thrust in order to of