Mountain bike frame

Abstract

The utility model belongs to the technical field of bicycle frame, especially relates to mountain bike frame, including front frame body, rear frame body and shock absorber, the upper arm of front frame body is equipped with middle pipe, the bottom of middle pipe is equipped with connecting seat, the bottom of connecting seat is equipped with the empty passage groove, and its end is connected with the lower arm of front frame body, the top of connecting seat is hinged with upper movable arm, one end of upper movable arm extends to the front and is equipped with first hinged part, the other end extends to the back and is equipped with second hinged part, the lower movable arm is hinged in the empty passage groove, the lower movable arm is equipped with third hinged part, the shock absorber is arranged obliquely, the front end is connected with first hinged part, the rear end passes through empty passage groove and its end is connected with third hinged part. The application reduces the compression ratio through the swing of double movable arms and the cooperative movement of shock absorber, which can not only improve the riding comfort and stability, but also reduce the impact damage of high-intensity riding on the whole frame.

Description

Technical Field

[0001] This utility model belongs to the technical field of bicycle frames, and particularly relates to mountain bike frames. Background Technology

[0002] Mountain bikes are designed for riding on rugged mountain terrain, forest trails, and wilderness paths. Existing technology, such as Chinese utility model patent CN202323271332.7, discloses a mountain bike frame and a mountain bike (as described in paragraph 50 of the specification). The front downtube has a rear shock absorber connector for connecting the rear shock absorber to the front frame. The lower end of the rear shock absorber is rotatably connected to the lower end of a first rotating connector via a pivot, and the upper end of the rear shock absorber is rotatably connected to the rear shock absorber connector via a pivot. However, this structure still has the following shortcomings: the rear shock absorber connector is fixedly connected to the front downtube; when subjected to external forces, the pivot only applies axial compression to the shock absorber, resulting in a high compression ratio and affecting riding stability and comfort. Utility Model Content

[0003] The purpose of this utility model is to provide a mountain bike frame, aiming to solve the technical problems in the prior art.

[0004] To achieve the above objectives, the mountain bike frame provided in this embodiment includes a front frame, a rear frame, and a shock absorber. The upper arm of the front frame has a center tube, and the bottom of the center tube has a connecting seat. The bottom of the connecting seat has a clearance groove, and its end is connected to the lower arm of the front frame. The top of the connecting seat is hinged to an upper movable arm. One end of the upper movable arm extends forward and has a first hinge portion, and the other end extends backward and has a second hinge portion. A lower movable arm is hinged in the clearance groove, and the lower movable arm has a third hinge portion. The shock absorber is arranged at an angle, with its front end connected to the first hinge portion and its rear end passing through the clearance groove and its end connected to the third hinge portion. The upper arm of the rear frame is connected to the second hinge portion, and the lower arm is connected to the rear end of the lower movable arm.

[0005] Optionally, the upper movable arm includes a pair of oppositely arranged swing arms, with a connecting rib between the pair of swing arms and an assembly notch formed for the connecting seat to pass through. The connecting seat is provided with a rotating shaft I, which is hinged to the assembly notch.

[0006] Optionally, the first hinge is a pivot II located between the pair of swing arms, and the pivot II is hinged to the shock absorber.

[0007] Optionally, the second hinge portion includes a pivot III corresponding to each of the swing arms, and the upper arm of the rear frame includes a pair of oppositely arranged upper rear forks. The front ends of the pair of upper rear forks are respectively provided with a first section fork that is hinged to the pivot III, and the rear ends are connected to the lower arm of the rear frame.

[0008] Optionally, the lower arm of the rear frame includes a pair of oppositely arranged lower rear forks, the front ends of the pair of lower rear forks are respectively connected to the lower movable arm, and the rear ends are respectively provided with U-shaped rear hook tails. The other end of the rear hook tail is provided with a pivot IV, and the rear end of the upper rear fork is located at the second fork section hinged to the pivot IV.

[0009] Optionally, the rear end of the shock absorber is provided with a pivot V, and the top of the lower movable arm is provided with a third fork that is hinged to the pivot V.

[0010] Optionally, the third hinge part is a rotating shaft VI located in the clearance groove, and the rotating shaft VI is hinged to the lower movable arm.

[0011] Optionally, it also includes an inclined reinforcing tube, the top end of which is connected to the upper arm of the front frame and the bottom end of which is connected to the middle tube.

[0012] Optionally, it also includes a front tube, which is located at the end of the front frame away from the rear frame.

[0013] Optionally, it also includes a lower tube, which is located at one end of the front frame near the rear frame.

[0014] The mountain bike frame provided in this utility model embodiment has at least one of the following technical effects: when subjected to external force, the upper and lower movable arms swing respectively, and in conjunction with the first hinge and the third hinge plate, provide an arc transition action when the shock absorber is compressed, thereby effectively reducing the compression ratio of the shock absorber. Compared with the prior art, this application, through the swing of the double movable arms and the coordinated movement of the shock absorber, although it requires sacrificing 8-12mm of shock absorber travel, is sufficient to meet the needs of intense downhill riding. Reducing the compression ratio not only improves riding comfort and stability, but also reduces the impact damage to the overall frame caused by high-intensity riding. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is one of the structural schematic diagrams of a mountain bike frame provided in an embodiment of the present utility model.

[0017] Figure 2 This is the second structural schematic diagram of a mountain bike frame provided in an embodiment of the present invention.

[0018] The following are the labeling elements in the figure:

[0019] 1—Front frame 11—Middle tube 12—Connecting seat

[0020] 13—Clearing groove; 14—Upper movable arm; 141—First hinge section

[0021] 142—Second hinge joint; 143—Swing arm; 144—Connecting rib

[0022] 145—Assembly notch; 15—Lower movable arm; 151—Third hinge.

[0023] 16—Reinforcing pipe; 17—Front pipe; 18—Lower pipe

[0024] 2—Rear frame 21—Upper rear fork 22—First fork section

[0025] 23 - Lower rear fork 24 - Rear hook tail 25 - Second section fork

[0026] 3—Shock absorber. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0031] In one embodiment of this utility model, such as Figures 1-2 As shown, a mountain bike frame is provided, including a front frame 1, a rear frame 2, and a shock absorber 3. The upper arm of the front frame 1 is provided with a center tube 11, and the bottom of the center tube 11 is provided with a connecting seat 12. The bottom of the connecting seat 12 has a clearance groove 13, and its end is connected to the lower arm of the front frame 1. The top of the connecting seat 12 is hinged to an upper movable arm 14. One end of the upper movable arm 14 extends forward and has a first hinge portion 141, and the other end extends backward and has a second hinge portion 142. A lower movable arm 15 is hinged in the clearance groove 13. The lower movable arm 15 has a third hinge portion 151. The shock absorber 3 is arranged at an angle, with its front end connected to the first hinge portion 141, its rear end passing through the clearance groove 13, and its end connected to the third hinge portion 151. The upper arm of the rear frame 2 is connected to the second hinge portion 142, and its lower arm is connected to the rear end of the lower movable arm 15. When subjected to external force, the upper movable arm 14 and the lower movable arm 15 swing respectively, and in conjunction with the first hinge part 141 and the third hinge plate, provide an arc transition action when the shock absorber 3 is compressed, thereby effectively reducing the compression ratio of the shock absorber 3.

[0032] In one embodiment of this utility model, such as Figures 1-2 As shown, the upper movable arm 14 includes a pair of opposing swing arms 143. A connecting rib 144 is provided between the pair of swing arms 143, and an assembly notch 145 is formed for the connecting seat 12 to pass through. A rotating shaft I is provided on the connecting seat 12, and the rotating shaft I is hinged to the assembly notch 145. The stroke of the pair of swing arms 143 can avoid the assembly notch 145 of the air tube 11, which helps to improve the compactness of the structure.

[0033] In one embodiment of this utility model, such as Figures 1-2 As shown, the first hinge part 141 is a pivot II located between a pair of swing arms 143, and the pivot II is hinged to the shock absorber 3.

[0034] In one embodiment of this utility model, such as Figures 1-2 As shown, the second hinge portion 142 includes a pivot III corresponding to each swing arm 143. The upper arm of the rear frame 2 includes a pair of oppositely arranged upper rear forks 21. The front ends of the pair of upper rear forks 21 are respectively provided with first fork sections 22 that are hinged to the pivot III, and the rear ends are connected to the lower arm of the rear frame 2. The structural design of the pair of upper rear forks 21 improves the lateral rigidity of the frame and enhances the stability of the frame.

[0035] In one embodiment of this utility model, such as Figures 1-2 As shown, the lower arm of the rear frame 2 includes a pair of oppositely arranged lower rear forks 23. The front ends of the pair of lower rear forks 23 are respectively connected to the lower movable arm 15, and the rear ends are respectively provided with U-shaped rear dropouts 24. The other end of the rear dropout 24 is provided with a pivot Ⅳ. The rear end of the upper rear fork 21 is located at the second fork section 25, which is hinged to the pivot Ⅳ. This can significantly reduce the interference with the frame balance during braking, avoid instability or even rollover risk caused by braking, and enhance handling confidence.

[0036] In one embodiment of this utility model, such as Figures 1-2 As shown, the rear end of the shock absorber 3 is provided with a rotating shaft V, and the top of the lower movable arm 15 is provided with a third fork that is hinged to the rotating shaft V.

[0037] In one embodiment of this utility model, such as Figures 1-2 As shown, the third hinge part 151 is a rotating shaft VI provided in the clearance groove 13, and the rotating shaft VI is hinged to the lower movable arm 15.

[0038] In one embodiment of this utility model, such as Figures 1-2 As shown, it also includes an inclined reinforcing tube 16, the top end of which is connected to the upper arm of the front frame 1, and the bottom end of which is connected to the middle tube 11. This further improves the stability of the frame structure.

[0039] In one embodiment of this utility model, such as Figures 1-2 As shown, it also includes a front tube 17, which is located at the end of the front frame 1 away from the rear frame 2. The front tube 17 is used to mount the bicycle front fork.

[0040] In one embodiment of this utility model, such as Figures 1-2As shown, it also includes a lower tube 18, which is located at one end of the front frame 1 near the rear frame 2. The lower tube 18 is used to mount bicycle pedals.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mountain bike frame, comprising a front frame, a rear frame, and shock absorbers, characterized in that: The upper arm of the front frame is provided with a central tube, and the bottom of the central tube is provided with a connecting seat. The bottom of the connecting seat is provided with a clearance groove, and its end is connected to the lower arm of the front frame. The top of the connecting seat is hinged to an upper movable arm. One end of the upper movable arm extends forward and is provided with a first hinge part, and the other end extends backward and is provided with a second hinge part. A lower movable arm is hinged in the clearance groove. The lower movable arm is provided with a third hinge part. The shock absorber is arranged at an angle, with its front end connected to the first hinge part and its rear end passing through the clearance groove and its end connected to the third hinge part. The upper arm of the rear frame is connected to the second hinge part, and the lower arm is connected to the rear end of the lower movable arm.

2. The mountain bike frame according to claim 1, characterized in that: The upper movable arm includes a pair of swing arms arranged opposite each other, with a connecting rib between the pair of swing arms and an assembly notch formed for the connecting seat to pass through. The connecting seat is provided with a rotating shaft I, which is hinged to the assembly notch.

3. The mountain bike frame according to claim 2, characterized in that: The first hinge is a pivot II located between the pair of swing arms, and the pivot II is hinged to the shock absorber.

4. The mountain bike frame according to claim 2, characterized in that: The second hinge part includes a pivot III corresponding to each of the swing arms. The upper arm of the rear frame includes a pair of oppositely arranged upper rear forks. The front ends of the pair of upper rear forks are respectively provided with a first section fork that is hinged to the pivot III, and the rear ends are connected to the lower arm of the rear frame.

5. The mountain bike frame according to claim 4, characterized in that: The lower arm of the rear frame includes a pair of oppositely arranged lower rear forks. The front ends of the pair of lower rear forks are respectively connected to the lower movable arm, and the rear ends are respectively provided with U-shaped rear hook tails. The other end of the rear hook tail is provided with a pivot IV. The rear end of the upper rear fork is located at the second fork section hinged to the pivot IV.

6. The mountain bike frame according to claim 1, characterized in that: The shock absorber has a pivot V at its rear end, and the lower movable arm has a third fork that is hinged to the pivot V at its top.

7. The mountain bike frame according to claim 1, characterized in that: The third hinge part is a rotating shaft VI located in the clearance groove, and the rotating shaft VI is hinged to the lower movable arm.

8. The mountain bike frame according to claim 1, characterized in that: It also includes a reinforcing tube arranged at an angle, the top end of which is connected to the upper arm of the front frame and the bottom end of which is connected to the middle tube.

9. The mountain bike frame according to claim 1, characterized in that: It also includes a front tube, which is located at the end of the front frame away from the rear frame.

10. The mountain bike frame according to claim 1, characterized in that: It also includes a lower tube, which is located at one end of the front frame near the rear frame.

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