Rear fork connecting structure and off-road motorcycle

Abstract

The utility model discloses a rear fork connecting structure and a cross-country motorcycle. The rear fork connecting structure comprises a main frame, a left rear fork and a right rear fork, the front ends of the left rear fork and the right rear fork are connected to the main frame, and the rear ends of the left rear fork and the right rear fork are connected to a rear axle; the main frame comprises a left connecting frame and a right connecting frame which are arranged at an interval and are respectively connected with the front ends of the left rear fork and the right rear fork; the front end of the left rear fork and the front end of the right rear fork are each provided with a rear fork connecting part, and the left connecting frame and the right connecting frame are each provided with a bicycle frame connecting part. The rear fork connecting part comprises an insert mounting hole, an insert is mounted in the insert mounting hole, the insert is fixed with the rear fork connecting part through a screw, and a connecting shaft is arranged to penetrate through the frame connecting part and the rear fork connecting part to be fastened with the insert in a threaded manner.

Description

Technical Field

[0001] The present application relates to the technical field of off-road motorcycles, and in particular to a rear fork connection structure and an off-road motorcycle. Background Art

[0002] The rear swingarm of a motorcycle is one of the important components of the motorcycle. It mainly consists of left and right swingarm main pipes and a connecting plate connecting the left and right swingarm main pipes. The rear swingarm is located in the middle and lower part of the motorcycle, generally in an "H" shape, and is installed between the motorcycle frame and the wheel axle. It mainly connects the rear wheel and the frame, playing a role in supporting and guiding the rear wheel. The design and structure of the rear swingarm have an important impact on the controllability, stability, and comfort of the motorcycle.

[0003] The left and right swingarm main pipes of the existing off-road motorcycle rear swingarm are mostly of an integrated structure. For example, a rear swingarm of an electric off-road motorcycle and an electric off-road motorcycle disclosed in the patent publication number CN215971910U, through an integrally formed connecting pair and a hinge seat structure, greatly reduces the position of the connection point between the shock absorber and the rear swingarm, so that without changing the length of the rear swingarm, a longer shock absorber can be adapted for shock absorption. However, the integrated rear swingarm has problems of inconvenient maintenance and replacement. At the same time, the production and manufacturing difficulty and cost are relatively high. In addition, how to stably connect the rear swingarm and the frame bracket is also an urgent problem to be solved.

[0004] The purpose of the present application is to optimize the structure of the rear swingarm on the premise of not affecting the structural strength and shock absorption performance of the off-road motorcycle to solve the above problems.

[0005] Due to cost reasons, the existing motorcycle rear swingarms are generally directly designed as single-tube swingarm main pipes. The above content is only used to assist in understanding the technical solution of the present application, and does not represent an admission that the above content is the closest prior art to the present application. Summary of the Invention

[0006] Based on this, the present application provides a rear fork connection structure and an off-road motorcycle to solve one of the above technical problems.

[0007] The technical solution adopted by the present application to solve its technical problems is: In the first aspect, a rear fork connection structure includes a main frame, and a left rear fork and a right rear fork arranged at intervals; the front ends of the left rear fork and the right rear fork are connected to the main frame, and the rear ends are connected to the rear wheel axle; the main frame includes a left connection frame and a right connection frame arranged at intervals, which are respectively connected to the front ends of the left rear fork and the right rear fork; rear fork connection parts are provided at the front ends of the left rear fork and the right rear fork, and frame connection parts are provided on the left connection frame and the right connection frame; the rear fork connection part includes an insert mounting hole, an insert is installed in the insert mounting hole, the insert is fixed to the rear fork connection part by screws, and a connecting shaft is provided to pass through the frame connection part and the rear fork connection part to be threadedly fastened to the insert.

[0008] In some embodiments, the insert block includes a threaded hole and lugs distributed on both sides of the threaded hole. The inner end of the connecting shaft extends into the threaded hole to maintain a threaded connection, and the screw passes through the lugs to be fixed to the rear fork connecting portion.

[0009] In some embodiments, the outer contour of the insert block is consistent with the contour of the insert block mounting hole.

[0010] In some embodiments, the rear fork connecting portion further includes a first counterbore, and a first bushing and a second bushing are installed in the first counterbore. A first bearing is installed between the second bushing and the connecting shaft, and the first bearing presses the first bushing in the first counterbore.

[0011] In some embodiments, the frame connecting portion further includes a second counterbore and a shaft hole. A second bearing sleeved on the connecting shaft is installed at the shaft hole, a third bushing and a shaft cover sleeve pressed on the third bushing are installed in the second counterbore, and the head on the outer end of the connecting shaft presses the shaft cover sleeve and the third bushing in the second counterbore.

[0012] In some embodiments, there is a spacing between the first bearing and the second bearing.

[0013] In some embodiments, the insert block is made of metal.

[0014] In a second aspect, an off-road motorcycle is characterized by including the rear fork connecting structure according to any one of the first aspect, a first support member is installed between the left rear fork and the right rear fork, a second support member is installed between the left connecting frame and the right connecting frame, and a spring damping mechanism is installed between the first support member and the second support member.

[0015] In some embodiments, the spring damping mechanism includes a pivot member, a telescopic rod, and a spring. The upper end of the telescopic rod is pivotally connected to the second support member, the lower end of the telescopic rod is pivotally connected to the pivot member, and the pivot member is pivotally connected to the first support member.

[0016] In some embodiments, a third support member is further included between the lower portions of the left connecting frame and the right connecting frame, and a lower swing arm is pivotally connected between the third support member and the pivot member.

[0017] The beneficial effects of the present application are as follows: By using independent left and right rear forks to respectively connect the main frame and the rear wheel axle, the layout of the rear flat fork structure is optimized, making daily maintenance and replacement more convenient, and at the same time reducing the production difficulty and cost. The insert block is arranged in the insert block mounting hole and fixed to the connecting shaft by threads, playing a tight and stable connecting role between the main frame and the left and right rear forks. The spring damping mechanism installed on the off-road motorcycle reduces the vibration generated during riding. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the installation structure of the left rear fork and the right rear fork of the present application.

[0020] Figure 2 It is a schematic diagram of the connection between the left connecting frame and the left rear fork of the present application.

[0021] Figure 3 It is a schematic diagram of the structure of the spring shock absorption mechanism of the present application.

[0022] Figure 4 It is an exploded view of the left rear fork and the left connecting frame of the present application.

[0023] Figure 5 It is a schematic sectional view of the present application.

[0024] Figure 6 It is an exploded view of components such as the insert block and the connecting shaft of the present application.

[0025] Figure 7 It is a three-dimensional schematic diagram of the present application.

[0026] Explanation of the reference numerals in the drawings: 1, main frame; 101, left connecting frame; 102, right connecting frame; 2, left rear fork; 3, right rear fork; 4, rear wheel axle; 5, rear fork connecting part; 501, first counterbore; 6, frame connecting part; 601, second counterbore; 602, shaft hole; 7, insert block mounting hole; 8, insert block; 801, threaded hole; 802, lug; 9, screw; 10, connecting shaft; 11, first bushing; 12, second bushing; 13, third bushing; 14, first bearing; 15, second bearing; 16, shaft sleeve cover; 17, first support member; 18, second support member; 19, spring shock absorption mechanism; 1901, pivot member; 1902, telescopic rod; 1903, spring; 20, third support member; 21, lower swing arm. Detailed Description of the Embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection of the present application.

[0028] In the embodiments of the present application, please refer to Figures 1-7 As shown, for a rear fork connection structure and an off-road motorcycle, in a first aspect, it mainly includes: a main frame 1, and a left rear fork 2 and a right rear fork 3 arranged at intervals; the front ends of the left rear fork 2 and the right rear fork 3 are connected to the main frame 1, and the rear ends are connected to a rear wheel axle 4; the main frame 1 includes a left connecting frame 101 and a right connecting frame 102 arranged at intervals, which are respectively connected to the front ends of the left rear fork 2 and the right rear fork 3; the front ends of the left rear fork 2 and the right rear fork 3 are both provided with a rear fork connection portion 5, and the left connecting frame 101 and the right connecting frame 102 are both provided with a frame connection portion 6; the rear fork connection portion 5 includes an insert mounting hole 7, an insert 8 is installed in the insert mounting hole 7, the insert 8 is fixed to the rear fork connection portion 5 by a screw 9, and a connecting shaft 10 is provided to pass through the frame connection portion 6 and the rear fork connection portion 5 to be threadedly fastened to the insert 8.

[0029] Next, some preferred / improved embodiments based on the above embodiments will be further elaborated. Any one or a combination of multiple of the following embodiments can be selected.

[0030] As Figures 4-5 shown, the insert 8 includes a threaded hole 801 and lugs 802 distributed on both sides of the threaded hole 801. The inner end portion of the connecting shaft 10 extends into the threaded hole 801 to maintain a threaded connection. The screw 9 passes through the lugs 802 to be fixed to the rear fork connection portion 5. By tightening the connecting shaft 10 into the insert 8, the rear fork connection portion 5 and the frame connection portion 6 are tightly fixed together. At the same time, the screw 9 fixes the insert 8 to the rear fork connection portion 5, and finally realizes the connection between the main frame 1 and the left rear fork 2 or the right rear fork 3.

[0031] Specifically, the outer contour of the insert 8 is consistent with the contour of the insert mounting hole 7, so that the insert 8 can be tightly fixed in the insert mounting hole 7 without rotating and causing loosening or even detachment of the insert 8.

[0032] Further, the rear fork connecting portion 5 further includes a first counterbore 501. A first bushing 11 and a second bushing 12 are installed in the first counterbore 501. A first bearing 14 is installed between the second bushing 12 and the connecting shaft 10. The first bearing 14 presses the first bushing 11 in the first counterbore 501. The first bushing 11 and the second bushing 12 are used to reduce the friction and wear between the rear fork connecting portion 5 and the connecting shaft 10, and can also have a good service state under a long-term vibrating working environment.

[0033] Further, the frame connecting portion 6 further includes a second counterbore 601 and a shaft hole 602. A second bearing 15 sleeved on the connecting shaft 10 is installed at the shaft hole 602. A third bushing 13 and a bushing cover 16 pressed on the third bushing 13 are installed in the second counterbore 601. The head on the outer end of the connecting shaft 10 presses the bushing cover 16 and the third bushing 13 in the second counterbore 601, so that the frame connecting portion 6 and the rear fork connecting portion 5 are closely attached together.

[0034] Specifically, a distance is maintained between the first bearing 14 and the second bearing 15.

[0035] Specifically, the insert block 8 is made of metal material, which can ensure its certain structural strength and improve its durability and stability.

[0036] In the second aspect, as Figures 2-3 and Figure 7 shown, an off-road motorcycle is characterized by including the rear fork connection structure according to any one of the first aspect. A first support member 17 is installed between the left rear fork 2 and the right rear fork 3. A second support member 18 is installed between the left connecting frame 101 and the right connecting frame 102. A spring damping mechanism 19 is installed between the first support member 17 and the second support member 18, which can effectively reduce the vibration generated during riding.

[0037] Further, the spring damping mechanism 19 includes a pivot member 1901, a telescopic rod 1902 and a spring 1903. The upper end of the telescopic rod 1902 is pivotally connected to the second support member 18. The lower end of the telescopic rod 1902 is pivotally connected to the pivot member. The pivot member is pivotally connected to the first support member 17. Among them, the spring damping mechanism 19 and the first support member 17 are not on the same straight line, and the two are rotationally connected through the pivot member 1901.

[0038] Further, it further includes a third support member 20 arranged between the lower parts of the left connecting frame 101 and the right connecting frame 102. A lower swing arm 21 is pivotally connected between the third support member 20 and the pivot member, which can better share the generated vibration while strengthening the connection strength of the structure, and achieve a better damping effect.

[0039] So far, various embodiments of the present application have been described in detail. To avoid obscuring the concept of the present application, some details well known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present application. The foregoing embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A rear fork connection structure, characterized in that, Comprising a main frame, as well as a left rear fork and a right rear fork arranged at intervals; the front ends of the left rear fork and the right rear fork are connected to the main frame, and the rear ends are connected to the rear wheel axle; The main frame includes a left connecting frame and a right connecting frame arranged at intervals, which are respectively connected to the front ends of the left rear fork and the right rear fork; Rear fork connecting parts are provided at the front ends of the left rear fork and the right rear fork, and frame connecting parts are provided on the left connecting frame and the right connecting frame; The rear fork connecting part includes an insert mounting hole, an insert is installed in the insert mounting hole, the insert is fixed to the rear fork connecting part by screws, and a connecting shaft is provided to pass through the frame connecting part and the rear fork connecting part to be threadedly fastened to the insert.

2. The rear fork connection structure according to claim 1, characterized in that, The insert includes a threaded hole and lugs distributed on both sides of the threaded hole. The inner end of the connecting shaft extends into the threaded hole to maintain a threaded connection, and the screw passes through the lugs to be fixed to the rear fork connecting part.

3. The rear fork connection structure according to claim 1, characterized in that, The outer contour of the insert is consistent with the contour of the insert mounting hole.

4. The rear fork connection structure according to claim 1, characterized in that, The rear fork connecting part further includes a first counterbore, a first bushing and a second bushing are installed in the first counterbore, a first bearing is installed between the second bushing and the connecting shaft, and the first bearing presses the first bushing in the first counterbore.

5. The rear fork connection structure according to claim 4, characterized in that, The frame connecting part further includes a second counterbore and a shaft hole. A second bearing sleeved on the connecting shaft is installed at the shaft hole, a third bushing and a shaft cover sleeve pressed on the third bushing are installed in the second counterbore, and the head on the outer end of the connecting shaft presses the shaft cover sleeve and the third bushing in the second counterbore.

6. The rear fork connection structure according to claim 5, characterized in that, A spacing is maintained between the first bearing and the second bearing.

7. The rear fork connection structure according to claim 1, characterized in that The insert is made of metal material.

8. An off-road motorcycle, characterized in that, Comprising the rear fork connecting structure according to any one of claims 1-7, a first support member is installed between the left rear fork and the right rear fork, a second support member is installed between the left connecting frame and the right connecting frame, and a spring shock absorption mechanism is installed between the first support member and the second support member.

9. An off-road motorcycle according to claim 8, characterized in that, The spring shock absorption mechanism includes a pivot member, a telescopic rod and a spring. The upper end of the telescopic rod is pivotally connected to the second support member, the lower end of the telescopic rod is pivotally connected to the pivot member, and the pivot member is pivotally connected to the first support member.

10. An off-road motorcycle according to claim 9, characterized in that, It further includes a third support member arranged between the lower parts of the left connecting frame and the right connecting frame, and a lower swing arm is pivotally connected between the third support member and the pivot member.

Images