Double-upper-fork linkage rocker arm shock-proof frame

Abstract

The utility model discloses a double upper fork linkage rocker arm shock-proof bicycle frame, which comprises a front triangular main body, a rear lower fork, a first rear upper fork, a second rear upper fork and a shock absorber, a middle pipe frame fork is fixed at the rear end of the front triangular main body, the rear end of the first rear upper fork is fixedly connected with the rear end of the rear lower fork, and the rear end of the first rear upper fork and the rear end of the rear lower fork are in a tilt shape; the rear lower fork is distributed in a shape, the front end of the rear lower fork is connected with the middle pipe frame fork in a hinged mode, the shock absorber is connected between the front end of the first rear upper fork and the front triangular body in a hinged mode, the rear end of the second rear upper fork is connected with the rear end of the rear lower fork in a hinged mode, and the front end of the second rear upper fork is connected with a connecting rod in a hinged mode. And the front end of the connecting rod is connected with the middle pipe frame fork through a hinge. The shock absorption and buffering capacity can be improved, ground rebound impact can be absorbed, and loosening of components can be avoided.

Description

Technical Field

[0001] The utility model relates to a bicycle frame, in particular to a double upper fork linkage swing arm shock-absorbing frame. Background Art

[0002] The shock-absorbing structure of a traditional multi-link shock-absorbing vehicle generally has a structure where the rear upper fork is a bilateral single-body structure. The rear upper fork connecting piece connects the rear end of the shock absorber, the front end of the shock absorber connects to the shock absorber support at the upper end of the frame down tube, the front lower end of the rear triangle is a pivot point, the pivot point is connected to the frame bottom bracket, the guiding link is connected to the rear end of the shock absorber, and the other end of the guiding link is connected to the frame upper tube. This is the shock-absorbing functional structure of a conventional shock-absorbing frame. After the frame bears weight, the front and rear triangles of the frame rotate around the pivot point rotation axis position as the center, and the entire rear fork deforms and displaces. Within the guiding angle of the guiding link, it pushes the rear upper fork to rotate and displace, pushing the rear end of the shock absorber to compress and deform, achieving the compression and buffering effect of the shock absorber. However, the structure of the traditional shock-absorbing frame is relatively simple, and its ability to withstand ground rebound impact is insufficient. During long-term riding, the component structure is prone to looseness and detachment. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a double upper fork linkage swing arm shock-absorbing frame that can improve shock-absorbing and buffering capabilities, absorb ground rebound impact, and prevent component loosening, aiming at the deficiencies of the prior art.

[0004] To solve the above technical problem, the utility model adopts the following technical solutions.

[0005] A double upper fork linkage swing arm shock-absorbing frame includes a front triangle main body, a rear lower fork, a first rear upper fork, a second rear upper fork, and a shock absorber. A middle tube support fork is fixed to the rear end of the front triangle main body. The rear end of the first rear upper fork is fixedly connected to the rear end of the rear lower fork and they are distributed in a "<" shape. The front end of the rear lower fork is hinge-connected to the middle tube support fork. The shock absorber is hinge-connected between the front end of the first rear upper fork and the front triangle main body. The rear end of the second rear upper fork is hinge-connected to the rear end of the rear lower fork. The front end of the second rear upper fork is hinge-connected with a connecting rod, and the front end of the connecting rod is hinge-connected to the middle tube support fork.

[0006] Preferably, two lower fork hinge heads are formed at the front end of the rear lower fork. The two lower fork hinge heads are respectively arranged on both sides of the middle tube support fork, and the lower fork hinge head and the middle tube support fork are hinge-connected through a lower fork hinge shaft assembly.

[0007] Preferably, a shock absorber support is arranged inside the front triangle main body, and the front end of the shock absorber is hinge-connected to the shock absorber support.

[0008] Preferably, a triangular fixing frame is formed at the rear end of the second rear upper fork, and a hinge slot is formed at the rear end of the rear lower fork. The triangular fixing frame is inserted into the hinge slot, and the triangular fixing frame and the rear lower fork are hinge-connected through an upper fork hinge shaft assembly.

[0009] Preferably, two connecting rods are hinge-connected to the front end of the second rear upper fork, and the two connecting rods are respectively arranged on both sides of the middle tube frame fork.

[0010] Preferably, a clearance opening is formed on the middle tube frame fork, and the shock absorber passes through the clearance opening.

[0011] In the double upper fork linkage swing arm shock-absorbing vehicle frame disclosed by the present utility model, the front triangular main body serves as the vehicle frame triangular main body, and its front end is used for installing a handlebar assembly. The middle tube frame fork is located at the rear end of the front triangular main body, and the upper end of the middle tube frame fork is used for installing a seat. The first rear upper fork and the rear lower fork are distributed in a "<" shape, and at the same time, the rear end of the first rear upper fork is fixedly connected to the rear end of the rear lower fork. Since the front end of the rear lower fork is hinge-connected to the middle tube frame fork, the "<" shape can be flipped relative to the front triangular main body, and the first rear upper fork applies pressure to the shock absorber, thereby exerting the shock-absorbing effect of the shock absorber. On this basis, the present utility model hinge-connects the rear end of the second rear upper fork to the rear end of the rear lower fork, so that the second rear upper fork and the connecting rod are successively hinged between the rear end of the rear lower fork and the middle tube frame fork, and the second rear upper fork and the connecting rod are used to guide the flipping movement of the "<" shape, making the overall structure of the vehicle frame more stable. The first rear upper fork can better apply pressure to the shock absorber, thereby improving the shock-absorbing and buffering ability, further absorbing the ground rebound impact, and at the same time, it can also prevent the components from loosening due to excessive vibration. Description of the Drawings

[0012] Figure 1 is an exploded view of the double upper fork linkage swing arm shock-absorbing vehicle frame of the present utility model;

[0013] Figure 2 is a state diagram of the double upper fork linkage swing arm shock-absorbing vehicle frame of the present utility model before bearing pressure;

[0014] Figure 3 is a state diagram of the double upper fork linkage swing arm shock-absorbing vehicle frame of the present utility model after bearing pressure. Detailed Embodiments

[0015] The present utility model will be described in more detail below with reference to the drawings and embodiments.

[0016] The present utility model discloses a double upper fork linkage swing arm shock-absorbing vehicle frame. Please refer to Figure 1, which includes a front triangular main body 1, a rear lower fork 2, a first rear upper fork 3, a second rear upper fork 4 and a shock absorber 5. A middle tube support fork 6 is fixed to the rear end of the front triangular main body 1. The rear end of the first rear upper fork 3 is fixedly connected to the rear end of the rear lower fork 2 and they are distributed in a "<" shape. The front end of the rear lower fork 2 is hinged to the middle tube support fork 6. The shock absorber 5 is hinged between the front end of the first rear upper fork 3 and the front triangular main body 1. The rear end of the second rear upper fork 4 is hinged to the rear end of the rear lower fork 2. The front end of the second rear upper fork 4 is hinged with a connecting rod 7, and the front end of the connecting rod 7 is hinged to the middle tube support fork 6.

[0017] In the above structure, the front triangular main body 1 serves as the frame triangular main body, and its front end is used to install the handlebar assembly. The middle tube support fork 6 is located at the rear end of the front triangular main body 1, and the upper end of the middle tube support fork 6 is used to install the seat. The first rear upper fork 3 and the rear lower fork 2 are distributed in a "<" shape, and at the same time, the rear end of the first rear upper fork 3 is fixedly connected to the rear end of the rear lower fork 2. Since the front end of the rear lower fork 2 is hinged to the middle tube support fork 6, the "<" shape can be flipped relative to the front triangular main body 1, and the first rear upper fork 3 applies pressure to the shock absorber 5, thereby exerting the shock-absorbing effect of the shock absorber 5. On this basis, in the present utility model, the rear end of the second rear upper fork 4 is hinged to the rear end of the rear lower fork 2, so that the second rear upper fork 4 and the connecting rod 7 are sequentially hinged between the rear end of the rear lower fork 2 and the middle tube support fork 6, and the second rear upper fork 4 and the connecting rod 7 are used to guide the flipping movement of the "<" shape, making the overall structure of the frame more stable. The state views of the frame before and after bearing pressure are as Figure 2 and Figure 3 shown. The first rear upper fork 3 can better apply pressure to the shock absorber 5, thereby improving the shock-absorbing and buffering ability, further absorbing the ground rebound impact, and at the same time, it can also prevent the components from loosening due to excessive vibration.

[0018] Regarding the preferred structure of the rear lower fork 2, please refer to Figure 1 , two lower fork hinge joints 20 are formed at the front end of the rear lower fork 2. The two lower fork hinge joints 20 are respectively arranged on both sides of the middle tube support fork 6, and the lower fork hinge joints 20 are hinged to the middle tube support fork 6 through a lower fork hinge shaft assembly 21. Among them, the lower fork hinge shaft assembly 21 can be composed of components such as a horizontal shaft, a shaft sleeve, and a bearing.

[0019] In order to facilitate the installation and support of the shock absorber 5, in this embodiment, a shock absorber support 10 is provided inside the front triangular main body 1, and the front end of the shock absorber 5 is hinged to the shock absorber support 10. Further, the shock absorber support 10 is preferably a triangular support.

[0020] Regarding the preferred matching relationship between the second rear upper fork 4 and the rear lower fork 2, in this embodiment, a triangular fixing frame 40 is formed at the rear end of the second rear upper fork 4, and a hinge slot 22 is formed at the rear end of the rear lower fork 2. The triangular fixing frame 40 is inserted into the hinge slot 22, and the triangular fixing frame 40 and the rear lower fork 2 are hingedly connected by an upper fork hinge shaft assembly 23. Among them, based on the hinge cooperation relationship between the triangular fixing frame 40 and the hinge slot 22 in this embodiment, the angular positions of the second rear upper fork 4 and the connecting rod 7 can follow the deformation state of the frame, and the linkage performance and guiding performance are better.

[0021] During specific operation, after the frame is stressed when riding on a bumpy road surface, the front and rear parts displace, driving the displacement and deformation of the second rear upper fork and the connecting rod structure, and generating a rotational displacement action with the frame pivot point as the center. The second rear upper fork structure drives the "<" - shaped structure connecting part to be stressed. The second rear upper fork rotates and displaces forward. The "<" - shaped structure simultaneously displaces through the hinge structure. The front shock absorber support pushes the shock absorber to compress. The front and rear parts of the frame absorb the vibration caused by the ground bumps through the compression of the shock absorber. After being stressed and compressed, the elastic force of the shock absorber itself becomes smaller and then rebounds. The internal spring of the shock absorber recovers its elasticity after being compressed, and the front and rear triangles of the frame displace in the reverse direction and recover.

[0022] To improve the linkage reliability between the second rear upper fork 4 and the middle pipe frame fork 6, in this embodiment, two connecting rods 7 are hingedly connected to the front end of the second rear upper fork 4, and the two connecting rods 7 are respectively arranged on both sides of the middle pipe frame fork 6.

[0023] In this embodiment, the shock absorber 5 should extend after passing through the middle pipe frame fork 6. Specifically, an emptying opening 60 is formed on the middle pipe frame fork 6, and the shock absorber 5 passes through the emptying opening 60.

[0024] Compared with the prior art, the present utility model adopts a double upper fork linkage structure, and uses the newly added single swing arm linkage structure to achieve the dynamic balance of guiding the compression and rebound of the shock absorber, with higher working efficiency. Through the rotational displacement of the second rear upper fork and the connecting rod and the mutual linkage of the "<" - shaped structure, the dynamic balance is continuously adjusted, protecting the frame structure and the shock absorber, improving the impact resistance of the frame, and at the same time, protecting the shock absorber to a greater extent and extending the service life of the shock absorber.

[0025] The above description is only a preferred embodiment of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements, or improvements made within the technical scope of the present utility model shall be included within the scope protected by the present utility model.

Claims

1. A double upper fork linked rocker arm shock-absorbing frame, characterized in that: The invention comprises a front triangle body (1), a rear chain fork (2), a first rear seat fork (3), a second rear seat fork (4) and a shock absorber (5); a middle tube frame fork (6) is fixed to the rear end of the front triangle body (1); a rear end of the first rear seat fork (3) is fixedly connected to a rear end of the rear chain fork (2) and the two are arranged in a "<" shape; a front end of the rear chain fork (2) is hinge-connected to the middle tube frame fork (6); the shock absorber (5) is hinge-connected between the front end of the first rear seat fork (3) and the front triangle body (1); a rear end of the second rear seat fork (4) is hinge-connected to a rear end of the rear chain fork (2); a front end of the second rear seat fork (4) is hinge-connected to a connecting rod (7); and a front end of the connecting rod (7) is hinge-connected to the middle tube frame fork (6).

2. The double upper fork linked rocker arm suspension frame according to claim 1, characterized in that: The front end of the rear lower fork (2) is formed with two lower fork hinge joints (20), which are respectively arranged on both sides of the middle tube frame fork (6), and the lower fork hinge joints (20) are hinge-connected to the middle tube frame fork (6) via a lower fork hinge shaft assembly (21).

3. The double upper fork linked rocker arm shock-absorbing frame according to claim 1, characterized in that: A shock absorber support (10) is provided on the inner side of the front triangle body (1), and the front end of the shock absorber (5) is hingedly connected to the shock absorber support (10).

4. The double upper fork linked rocker arm shock-absorbing frame according to claim 1, characterized in that: A triangular fixing frame (40) is formed at the rear end of the second upper fork (4), and a hinge groove (22) is formed at the rear end of the lower fork (2). The triangular fixing frame (40) is inserted into the hinge groove (22), and the triangular fixing frame (40) and the lower fork (2) are hingedly connected via an upper fork hinge shaft assembly (23).

5. The double upper fork linked rocker arm shock-absorbing frame according to claim 1, characterized in that: The front end of the second rear upper fork (4) is hingedly connected to two connecting rods (7), and the two connecting rods (7) are respectively arranged on both sides of the middle tube frame fork (6).

6. The double upper fork linked rocker arm shock-absorbing frame according to claim 1, characterized in that: The middle tube frame fork (6) is formed with a space-avoiding opening (60), and the shock absorber (5) passes through the space-avoiding opening (60).

Images