Half-hidden type three-limiting-connecting-rod rocker arm electric power-assisted shock-absorbing frame

Abstract

The utility model discloses a semi-hidden type three-limit connecting rod rocker arm electric power-assisted shock-proof bicycle frame, which comprises a main frame, a rear fork, a shock absorber, a middle rocker arm and a lower rocker arm, the main frame comprises a lower tube, an upper tube, a middle tube and a motor hanger which are sequentially fixed in a triangular shape, the rear fork comprises a lower fork, an upper fork and an upper rocker arm, the rear end of the lower fork is fixedly connected with the rear end of the upper fork, and the shock absorber is fixedly connected with the middle rocker arm. The front end of the lower fork is hinged to the motor hanging frame, the front end of the upper fork is hinged to the rear end of the upper rocker arm, the front end of the upper rocker arm is hinged to the middle pipe, a seat body of the shock absorber is hinged to the lower pipe, the middle rocker arm is in an L shape, the upper end of the middle rocker arm is hinged to a telescopic rod of the shock absorber, and the lower end of the middle rocker arm is hinged to the motor hanging frame. The lower end of the lower rocker arm is hinged to the bent position of the middle rocker arm, and the upper end of the lower rocker arm is hinged to the lower fork. The shock absorber is effectively buffered and protected, the service life of the shock absorber can be prolonged, and stress balance of the main frame and the rear fork is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric power-assisted vehicle frame especially relates to a half-concealed three-limiting connecting rod rocker arm electric power-assisted shock absorbing vehicle frame. BACKGROUND

[0002] In the conventional multi-connecting rod shock absorbing rocker arm structure, the shock absorbing connecting piece is generally connected with the shock absorber together, and the connecting piece rotates to compress the shock absorber to obtain good shock absorbing effect of the vehicle frame. The common shock absorbing vehicle frame structure uses the rear triangle of the vehicle frame to push the connecting piece connected therewith as a whole, thereby applying a certain force to the front triangle of the vehicle frame, and the stress is transmitted to the shock absorber through the connecting piece in the positive direction (the force is applied to the front triangle of the vehicle frame), and then the shock absorber is compressed to achieve the displacement of the front and rear triangles of the vehicle frame, so as to reduce the bump from the ground and improve the riding comfort. However, when the existing shock absorbing vehicle frame encounters bump, most or all of the stress generated will be loaded on the shock absorber, which causes the shock absorber to be easily fatigued and lacks protection for the shock absorber. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a half-concealed three-limiting connecting rod rocker arm electric power-assisted shock absorbing vehicle frame which has a buffering protection effect on the shock absorber, can improve the service life of the shock absorber, and is helpful to the stress balance of the main frame and the rear fork.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme.

[0005] A half-concealed three-limiting connecting rod rocker arm electric power-assisted shock absorbing vehicle frame comprises a main frame, a rear fork, a shock absorber, a middle rocker arm and a lower rocker arm. The main frame comprises a lower pipe, an upper pipe, a middle pipe and a motor hanger fixed in sequence in a triangular shape. The rear fork comprises a lower fork, an upper fork and an upper rocker arm. The rear end of the lower fork and the rear end of the upper fork are fixedly connected. The front end of the lower fork is hingedly connected with the motor hanger. The front end of the upper fork is hingedly connected with the rear end of the upper rocker arm. The front end of the upper rocker arm is hingedly connected with the middle pipe. The seat body of the shock absorber is hingedly connected with the lower pipe. The middle rocker arm is in the shape of "L". The upper end of the middle rocker arm is hingedly connected with the telescopic rod of the shock absorber. The lower end of the middle rocker arm is hingedly connected with the motor hanger. The lower end of the lower rocker arm is hingedly connected with the bending part of the middle rocker arm. The upper end of the lower rocker arm is hingedly connected with the lower fork.

[0006] Preferably, the middle pipe comprises an upper rocker arm support seat, and the front end of the upper rocker arm is hingedly connected with the upper rocker arm support seat.

[0007] Preferably, the upper rocker arm is in the shape of "U", and the upper rocker arm is arranged on the outside of the middle pipe.

[0008] Preferably, the lower end of the middle tube forms a receiving cavity, and the shock absorber, the middle rocker arm, and the lower rocker arm are all located within the receiving cavity.

[0009] Preferably, the front end of the lower fork forms two hinged arms, and the front ends of the two hinged arms are respectively hinged to the two side walls of the receiving cavity.

[0010] Preferably, it includes two lower rocker arms, which are respectively disposed on both sides of the middle rocker arm, and the upper ends of the two lower rocker arms are respectively hinged to two hinge arms.

[0011] In the semi-concealed three-position linkage rocker arm electric power-assisted suspension frame disclosed in this utility model, when the frame encounters bumps during riding, the center tube generates a downward tendency force, and the rear end of the rear fork tends to rise. During this process, the lower fork applies stress to the middle rocker arm through the lower rocker arm, and then transmits the pressure to the telescopic rod of the shock absorber through the upper end of the middle rocker arm. Because the middle rocker arm is "L"-shaped, and the lower end of the lower rocker arm is hinged to the bend of the middle rocker arm, the stress between the lower fork and the shock absorber is transmitted sequentially through the lower rocker arm and the middle rocker arm. Compared with the prior art that directly applies bump stress to the shock absorber, this utility model provides effective buffering and protection for the shock absorber, which not only improves the service life of the shock absorber, but also helps to balance the force on the main frame and the rear fork. Attached Figure Description

[0012] Fig. 1 This is an exploded view of the electric power-assisted shock-absorbing bicycle frame of this utility model;

[0013] Fig. 2 This is a three-dimensional view of a partially cut section of the electric power-assisted shock absorber frame of this utility model;

[0014] Fig. 3 This is a comparison view of the electric power-assisted shock absorber frame of this utility model before and after being subjected to force. Detailed Implementation

[0015] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0016] This utility model discloses a semi-concealed three-limit linkage rocker arm electric power suspension frame, combined with Figs. 1 to 3As shown, it comprises a main frame 1, a rear fork 2, a shock absorber 3, a middle rocker arm 4 and a lower rocker arm 5, the main frame 1 comprises a lower pipe 10, an upper pipe 11, a middle pipe 12 and a motor hanger 13 fixed in sequence in a triangular shape, the rear fork 2 comprises a lower fork 20, an upper fork 21 and an upper rocker arm 22, the rear end of the lower fork 20 and the rear end of the upper fork 21 are fixedly connected, the front end of the lower fork 20 is hingedly connected with the motor hanger 13, the front end of the upper fork 21 is hingedly connected with the rear end of the upper rocker arm 22, the front end of the upper rocker arm 22 is hingedly connected with the middle pipe 12, the seat body of the shock absorber 3 is hingedly connected with the lower pipe 10, the middle rocker arm 4 is in an "L" shape, the upper end of the middle rocker arm 4 is hingedly connected with the telescopic rod of the shock absorber 3, the lower end of the middle rocker arm 4 is hingedly connected with the motor hanger 13, the lower end of the lower rocker arm 5 is hingedly connected with the bending part of the middle rocker arm 4, and the upper end of the lower rocker arm 5 is hingedly connected with the lower fork 20.

[0017] In the above structure, when the frame encounters bumps during riding, the middle pipe 12 generates a downward trend force, and the rear end of the rear fork 2 shows an upward trend, in this process, the lower fork 20 applies stress to the middle rocker arm 4 through the lower rocker arm 5, and then conducts pressure to the telescopic rod of the shock absorber 3 through the upper end of the middle rocker arm 4, since the middle rocker arm 4 is in an "L" shape and the lower end of the lower rocker arm 5 is hingedly connected to the bending part of the middle rocker arm 4, the stress between the lower fork 20 and the shock absorber 3 is sequentially conducted through the lower rocker arm 5 and the middle rocker arm 4, compared with the prior art in which the bump stress is directly loaded on the shock absorber 3, the utility model has an effective buffering protection effect on the shock absorber, which not only can improve the service life of the shock absorber, but also helps to balance the stress of the main frame and the rear fork.

[0018] In order to facilitate the hinged cooperation with the upper rocker arm 22, in the embodiment, the middle pipe 12 comprises an upper rocker arm support seat 120, and the front end of the upper rocker arm 22 is hingedly connected with the upper rocker arm support seat 120.

[0019] As a preferred mode, the upper rocker arm 22 is in a "U" shape, and the upper rocker arm 22 is arranged on the outside of the middle pipe 12. Among them, the upper rocker arm 22 in the "U" shape, the middle part is hingedly connected with the upper rocker arm support seat 120, and the two rear ends are respectively hingedly connected with the front end of the upper fork 21.

[0020] The utility model preferably adopts a semi-hidden structure, specifically, the lower end of the middle pipe 12 forms an accommodating cavity 121, and the shock absorber 3, the middle rocker arm 4 and the lower rocker arm 5 are all located in the accommodating cavity 121.

[0021] As a preferred mode, the front end of the lower fork 20 is formed with two hinged arms 201, the front ends of the two hinged arms 201 are respectively hinged to the two side walls of the accommodating cavity 121. Further, the embodiment comprises two lower rocker arms 5, the two lower rocker arms 5 are respectively arranged on the two sides of the middle rocker arm 4, and the upper ends of the two lower rocker arms 5 are respectively hinged to the two hinged arms 201.

[0022] Among them, the embodiment helps to disperse the stress applied by the lower fork 20 to the shock absorber 3 by arranging two lower rocker arms 5, thereby improving the linkage performance.

[0023] The utility model discloses a half-concealed three-limiting connecting rod rocker arm electric power-assisted shock absorber frame, when it is subjected to external force, the front and rear triangle angle displacement occurs, the rocker arm structure drives the shock absorber to start compression movement through linkage, the rear upper fork takes the middle pipe fixed bearing pivot as the origin, the whole rear upper fork displacement arc shape moves forward, drives the middle rocker arm structure to compress the shock absorber, the upper middle lower three rocker arm structure moves forward simultaneously, the rocker arm virtual pivot dynamic displacement, the middle rocker arm is forced first, drives the lower rocker arm to displace after being forced, the middle lower rocker arm common reverse linkage movement compresses the shock absorber stroke, stops compression when the virtual pivot maximum, the front and rear double rocker arm linkage balance can greatly protect the shock absorber compression state in the limit movement, protect the linkage balance of the frame, protect the shock absorber from extreme impact, also avoid the great impact of the square cabin box strength of the front end of the shock absorber installation. When the ground bump disappears, the spring inside the shock absorber restores elasticity after compression, and the frame front and rear triangle displacement reversely restores.

[0024] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and the modification, equivalent replacement or improvement etc. made in the technical range of the utility model should be included in the range protected by the utility model.

Claims

1. A semi-hidden three-limit link swingarm electric assist suspension frame, characterized in that, The main frame, rear fork, shock absorber, middle rocker arm and lower rocker arm, the main frame comprises a lower tube, an upper tube, a middle tube and a motor hanger fixed in sequence in a triangular shape, the rear fork comprises a lower fork, an upper fork and an upper rocker arm, the rear end of the lower fork and the rear end of the upper fork are fixedly connected, the front end of the lower fork is hingedly connected with the motor hanger, the front end of the upper fork is hingedly connected with the rear end of the upper rocker arm, the front end of the upper rocker arm is hingedly connected with the middle tube, the seat body of the shock absorber is hingedly connected with the lower tube, the middle rocker arm is in an L shape, the upper end of the middle rocker arm is hingedly connected with the telescopic rod of the shock absorber, the lower end of the middle rocker arm is hingedly connected with the motor hanger, the lower end of the lower rocker arm is hingedly connected with the bent part of the middle rocker arm, and the upper end of the lower rocker arm is hingedly connected with the lower fork.

2. The semi-stealthy three-limit link swingarm electric assist suspension bike frame of claim 1, wherein, The middle tube comprises an upper rocker arm support seat, and the front end of the upper rocker arm is hingedly connected with the upper rocker arm support seat.

3. The semi-stealthy three-limit link swingarm electric assist suspension bike frame of claim 2, wherein, The upper rocker arm is in a U shape, and the upper rocker arm is arranged on the outer side of the middle tube.

4. The semi-stealthy three-limit link swingarm electric assist suspension bike frame of claim 1, wherein, The lower end of the middle tube is formed with an accommodating cavity, and the shock absorber, the middle rocker arm and the lower rocker arm are located in the accommodating cavity.

5. The semi-stealthy three-limit link swingarm electric assist suspension bike frame of claim 4, wherein, The front end of the lower fork is formed with two hinged arms, and the front ends of the two hinged arms are respectively hingedly connected with two side walls of the accommodating cavity.

6. The semi-stealthy three-limit link swingarm electric assist suspension bike frame of claim 5, wherein, Two lower rocker arms are arranged on the two sides of the middle rocker arm, and the upper ends of the two lower rocker arms are respectively hingedly connected with the two hinged arms.

Images