Rear rocker arm of motorcycle

Abstract

The utility model discloses a rear rocker arm of a motorcycle. The rear rocker arm comprises a front frame body, a left frame body, a right frame body and a rear shaft body, the inner side of the front end of the left frame body and the left side of the lower end of the front frame body are positioned through a first mortise and tenon joint structure, the front end of the left frame body is fixedly connected with the left side of the lower end of the front frame body through a first front screw, and the left side of the lower end of the front frame body is fixedly connected with the front end of the left frame body through a first reverse screw; the product is composed of the front frame body, the left frame body, the right frame body and the rear shaft body, the left frame body and the right frame body are located on the left side and the right side of the front frame body respectively through the right tenon-and-mortise structure, and the left frame body and the right frame body are firmly fixed to the left side and the right side of the front frame body respectively in cooperation with the front face screws and the back face screws. The front frame body, the left frame body and the right frame body can be cast separately, forming is easy, the structure is stable after combination, the product yield is greatly improved, meanwhile, the production cost is effectively reduced, and convenience is brought to manufacturing enterprises.

Description

Technical Field

[0001] The utility model relates to the field of motorcycle accessories, in particular to a motorcycle rear swing arm. Background Art

[0002] The rear swing arm of a motorcycle connects the frame and the rear wheel, transmitting and bearing the force and torque of the frame and the rear wheel. The force generated by the acceleration, deceleration and braking of the vehicle needs to be transmitted through the rear swing arm. The main functions of the rear swing arm are: 1. The rear swing arm needs to withstand strong power output when starting, and the engine torque brings forward driving force when starting; 2. The brake has sufficient hardness to withstand the drag force of the rear wheel during braking, and the torque of the rear wheel swinging, to maintain stability; 3. Change the load-bearing capacity of the wheel, better grip, and improve stability.

[0003] The current motorcycle rear swing arm is mainly welded by steel pipe or aluminum profile. The process is cumbersome and the dimensional accuracy is low, which increases the difficulty of subsequent machining and assembly. The failure of the vehicle rear swing arm often occurs at the welding part of the rear swing arm. For this reason, there are some motorcycle rear swing arms with an integrated structure, which adopts liquid die forging casting, which can solve the above problems well. For example, the patent CN207157402U mentions a motorcycle rear swing arm device formed by liquid die forging as a whole. Due to the complex structure of the rear swing arm, it is difficult to form, the product yield is low, and the cost is high. Therefore, it is necessary to improve the current motorcycle rear swing arm. Utility Model Content

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a motorcycle swingarm, which can effectively solve the problems of the existing motorcycle swingarm, such as difficulty in molding, low yield rate of finished products and high cost.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A motorcycle rear swing arm comprises a front frame, a left frame, a right frame and a rear axle body; the front end inner side of the left frame and the lower end left side of the front frame are positioned by a first mortise and tenon structure, the front end of the left frame is fixedly connected to the lower end left side of the front frame by a first front screw, and the lower end left side of the front frame is fixedly connected to the front end of the left frame by a first reverse screw; the front end inner side of the right frame and the lower end right side of the front frame are positioned by a second mortise and tenon structure, the front end of the right frame is fixedly connected to the lower end right side of the front frame by a second front screw, and the lower end right side of the front frame is fixedly connected to the front end of the right frame by a second reverse screw; the rear axle body is connected between the rear end of the left frame and the rear end of the right frame.

[0007] Preferably, the first mortise and tenon structure includes a first tenon and a first tenon groove, and the second mortise and tenon structure includes a second tenon and a second tenon groove, the first tenon and the second tenon respectively extend outward from the left and right sides of the lower end of the front frame, the first tenon groove is formed by a depression on the inner side of the front end of the left frame, and the second tenon groove is formed by a depression on the inner side of the front end of the right frame.

[0008] Preferably, a first screw hole is formed on the first tenon, a first through hole is formed on the front end of the left frame, and the first front screw passes through the first through hole and is screwed and fixed with the first screw hole.

[0009] Preferably, a second screw hole is formed on the second tenon, a second through hole is formed on the front end of the right frame body, and the second front screw passes through the second through hole and is screwed and fixed with the second screw hole.

[0010] Preferably, a third through hole is opened on the left side of the lower end of the front frame body, a third screw hole is opened on the inner side of the front end of the left frame body, and the first reverse screw passes through the third through hole and is screwed and fixed with the third screw hole.

[0011] Preferably, a fourth through hole is opened on the right side of the lower end of the front frame body, a fourth screw hole is opened on the inner side of the front end of the right frame body, and the second reverse screw passes through the fourth through hole and is screwed and fixed with the fourth screw hole.

[0012] Preferably, a caliper bracket for mounting a radiation caliper is provided on the inner side of the right frame.

[0013] Preferably, the rear end of the left frame is provided with a first adjusting member that can be adjusted forward and backward, and a first mounting hole is provided on the first adjusting member. The rear end of the right frame is provided with a second adjusting member that can be adjusted forward and backward, and a second mounting hole is provided on the second adjusting member. Both ends of the rear axle body are respectively inserted into the first mounting hole and the second mounting hole and are fixedly connected to the first adjusting member and the second adjusting member through nut members.

[0014] Preferably, the rear end outer side surface of the left frame is recessed with a first accommodating groove, and the rear end surface of the left frame is opened with a first through hole, the first through hole is connected to the first accommodating groove, the first adjusting member is provided with a first adjusting screw, the first adjusting member is arranged in the first accommodating groove and moves back and forth along the first accommodating groove, the first adjusting screw passes through the first through hole to extend outward from the rear end surface of the left frame and is threadedly connected with a first nut.

[0015] Preferably, a second accommodating groove is recessed on the outer side surface of the rear end of the right frame, and a second through-hole is opened on the rear end surface of the right frame, the second through-hole is connected to the second accommodating groove, and the second adjusting member is provided with a second adjusting screw, which is arranged in the second accommodating groove and moves back and forth along the second accommodating groove, and the second adjusting screw extends outward through the second through-hole to the rear end surface of the right frame and is threadedly connected with a second nut.

[0016] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0017] This product consists of a front frame, a left frame, a right frame and a rear axle body. The left frame and the right frame are respectively positioned on the left and right sides of the front frame through the right mortise and tenon structure, and the front screws and the back screws are used to firmly fix the left and right frames on the left and right sides of the front frame. The front frame, the left frame and the right frame can be cast separately, which is easy to form. The structure is stable after assembly, and the product yield is greatly improved. At the same time, it also effectively reduces the production cost, bringing convenience to the production enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an assembly perspective view of a preferred embodiment of the utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of the assembly of the preferred embodiment of the utility model from another angle;

[0020] Figure 3 It is an exploded view of a preferred embodiment of the utility model;

[0021] Figure 4 It is an exploded view from another angle of a preferred embodiment of the utility model.

[0022] Description of the accompanying drawings:

[0023] 10. Front frame 11. First tenon

[0024] 12. First screw hole 13. Third through hole

[0025] 14. Second tenon 15. Second screw hole

[0026] 16. Fourth through hole 17. First hollow hole

[0027] 20. Left frame 21. First mortise and tenon groove

[0028] 22. First through hole 23. Third screw hole

[0029] 24. First accommodating groove 25. First through hole

[0030] 26. Second hollow hole 30. Right frame

[0031] 31. Second mortise and tenon groove 32. Second through hole

[0032] 33. Fourth screw hole 34. Second receiving groove

[0033] 35. Second perforation 36. Third hollow hole

[0034] 40. Rear axle body 41. Nut

[0035] 51. First front screw 52. First back screw

[0036] 53. Second front screw 54. Second back screw

[0037] 55. Caliper bracket 60. First adjusting member

[0038] 61. First mounting hole 62. First adjusting screw

[0039] 63, first nut 70, second adjusting member

[0040] 71. Second mounting hole 72. Second adjusting screw

[0041] 73. Second Nut DETAILED DESCRIPTION

[0042] Please refer to Figures 1 to 4 As shown, it shows the specific structure of the preferred embodiment of the utility model, including a front frame body 10, a left frame body 20, a right frame body 30 and a rear axle body 40.

[0043] The front inner side of the left frame body 20 is positioned with the left side of the lower end of the front frame body 10 by a first mortise and tenon structure, the front end of the left frame body 20 is fixedly connected with the left side of the lower end of the front frame body 10 by a first front screw 51, and the left side of the lower end of the front frame body 10 is fixedly connected with the front end of the left frame body 20 by a first reverse screw 52. Specifically, the first mortise and tenon structure includes a first tenon 11 and a first tenon groove 21, the first tenon 11 protrudes outward from the left side of the lower end of the front frame body 10, and the first tenon groove 21 is formed by being recessed at the front inner side of the left frame body 20, and the first tenon 11 and the first tenon groove 21 are both obliquely extended long strips, with good structural strength and stable positioning. The first tenon 11 is provided with a first screw hole 12, the front end of the left frame 20 is provided with a first through hole 22, the first front screw 51 passes through the first through hole 22 and is screwed and fixed with the first screw hole 12, and the first screw hole 12 and the first through hole 22 are both arranged side by side with equal spacing, and correspondingly, the first front screw 51 is multiple, so that the installation connection is more stable and reliable, and it is not limited. And, the lower left side of the front frame 10 is provided with a third through hole 13, the inner side of the front end of the left frame 20 is provided with a third screw hole 23, the first reverse screw 52 passes through the third through hole 13 and is screwed and fixed with the third screw hole 23 to enhance the connection strength.

[0044] The front inner side of the right frame body 30 is positioned with the lower right side of the front frame body 10 by a second mortise and tenon structure, the front end of the right frame body 30 is fixedly connected with the lower right side of the front frame body 10 by a second front screw 53, and the lower right side of the front frame body 10 is fixedly connected with the front end of the right frame body 30 by a second back screw 54. Specifically, the second mortise and tenon structure includes a second tenon 14 and a second tenon groove 31, the second tenon 14 extends outward from the lower right side of the front frame body 10, and the second tenon groove 31 is formed by being recessed at the front inner side of the right frame body 30, and the second tenon 14 and the second tenon groove 31 are both obliquely extended long strips, with good structural strength and stable positioning. The second tenon 14 is provided with a second screw hole 15, the front end of the right frame 30 is provided with a second through hole 32, the second front screw 53 passes through the second through hole 32 and is screwed and fixed with the second screw hole 15, and the second screw hole 15 and the second through hole 32 are both arranged side by side and spaced evenly, and correspondingly, the second front screw 53 is multiple, so that the installation connection is more stable and reliable, and it is not limited. And, the lower right side of the front frame 10 is provided with a fourth through hole 16, the inner side of the front end of the right frame 30 is provided with a fourth screw hole 33, and the second reverse screw 54 passes through the fourth through hole 16 and is screwed and fixed with the fourth screw hole 33 to enhance the connection strength.

[0045] The rear axle body 40 is connected between the rear ends of the left frame body 20 and the rear ends of the right frame body 30. In this embodiment, the rear end of the left frame body 20 is provided with a first adjusting member 60 that can be adjusted forward and backward, and a first mounting hole 61 is provided on the first adjusting member 60, and the rear end of the right frame body 30 is provided with a second adjusting member 70 that can be adjusted forward and backward, and a second mounting hole 71 is provided on the second adjusting member 70, and both ends of the rear axle body 40 are respectively inserted into the first mounting hole 61 and the second mounting hole 71 and are respectively fixedly connected to the first adjusting member 60 and the second adjusting member 70 through the nut member 41. Specifically, a first accommodating groove 24 is recessed on the outer side surface of the rear end of the left frame 20, and a first through hole 25 is opened on the rear end surface of the left frame 20. The first through hole 25 is connected to the first accommodating groove 24. The first adjusting member 60 has a first adjusting screw 62. The first adjusting member 60 is arranged in the first accommodating groove 24 and moves forward and backward along the first accommodating groove 24. The first adjusting screw 62 passes through the first through hole 25 and extends outward from the rear end surface of the left frame 20 and is screwed together with a first nut 63. The structure is simple and easy to assemble. The rear end outer side surface of the right frame body 30 is recessed with a second accommodating groove 34, and the rear end surface of the right frame body 30 is opened with a second through hole 35, and the second through hole 35 is connected to the second accommodating groove 34. The second adjusting member 70 has a second adjusting screw 72, and the second adjusting member 70 is arranged in the second accommodating groove 34 and moves forward and backward along the second accommodating groove 34. The second adjusting screw 72 passes through the second through hole 35 and extends outward from the rear end surface of the right frame body 30 and is screwed with a second nut 73. The structure is simple and easy to assemble.

[0046] Furthermore, the front frame 10 is a frame-shaped structure, on which a plurality of first hollow holes 17 are provided, and the plurality of first hollow holes 17 are all triangular, the left frame 20 is provided with a plurality of second hollow holes 26, and the plurality of second hollow holes 26 are all triangular, and the right frame 30 is provided with a plurality of third hollow holes 36, and the plurality of third hollow holes 36 are all triangular, so as to achieve lightweight, which is conducive to reducing the unsprung mass, so as to change the load-bearing capacity of the wheel, better grip, and improve stability. In addition, the front frame 10, the left frame 20, and the right frame 30 are all integral die-cast parts, which are easy to form and have a high yield.

[0047] In addition, a caliper bracket 55 for mounting a radial caliper is disposed on the inner side of the right frame 30 to improve the performance of the motorcycle.

[0048] When in use, the product is installed on the rear side of the motorcycle frame, the front frame body 10 is fixed to the frame body of the motorcycle, and the rear wheel of the motorcycle is installed on the rear axle body 40. By adjusting the front and rear positions of the first adjusting member 60 and the second adjusting member 70, the front and rear positions of the rear wheel can be adjusted, and then the tension of the belt can be adjusted.

[0049] The design focus of the utility model is: the product consists of a front frame, a left frame, a right frame and a rear axle body, and the left frame and the right frame are respectively positioned on the left and right sides of the front frame through the right mortise and tenon structure, and the front screws and the back screws are used to firmly fix the left frame and the right frame on the left and right sides of the front frame, respectively. The front frame, the left frame and the right frame can be cast separately, and the molding is easy. The structure is stable after assembly, and the product yield is greatly improved. At the same time, the production cost is also effectively reduced, which brings convenience to the production enterprises.

[0050] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A motorcycle rear swing arm, characterized in that: The invention comprises a front frame body, a left frame body, a right frame body and a rear axle body; the front end inner side of the left frame body and the lower end left side of the front frame body are positioned by a first mortise and tenon structure, the front end of the left frame body is fixedly connected to the lower end left side of the front frame body by a first front screw, and the lower end left side of the front frame body is fixedly connected to the front end of the left frame body by a first reverse screw; the front end inner side of the right frame body and the lower end right side of the front frame body are positioned by a second mortise and tenon structure, the front end of the right frame body is fixedly connected to the lower end right side of the front frame body by a second front screw, and the lower end right side of the front frame body is fixedly connected to the front end of the right frame body by a second reverse screw; the rear axle body is connected between the rear end of the left frame body and the rear end of the right frame body.

2. A motorcycle rear swing arm as claimed in claim 1, characterized in that: The first mortise and tenon structure includes a first tenon and a first tenon groove, and the second mortise and tenon structure includes a second tenon and a second tenon groove. The first tenon and the second tenon groove extend outward from the left and right sides of the lower end of the front frame respectively, and the first tenon groove is formed by a depression on the inner side of the front end of the left frame, and the second tenon groove is formed by a depression on the inner side of the front end of the right frame.

3. A motorcycle swing arm as claimed in claim 2, characterized in that: A first screw hole is formed on the first tenon, a first through hole is formed on the front end of the left frame, and the first front screw passes through the first through hole and is screwed and fixed with the first screw hole.

4. A motorcycle swing arm as claimed in claim 2, characterized in that: A second screw hole is formed on the second tenon, a second through hole is formed on the front end of the right frame, and the second front screw passes through the second through hole and is screwed and connected with the second screw hole for fixing.

5. A motorcycle swing arm as claimed in claim 1, characterized in that: A third through hole is opened on the left side of the lower end of the front frame body, and a third screw hole is opened on the inner side of the front end of the left frame body. The first reverse screw passes through the third through hole and is screwed and fixed with the third screw hole.

6. A motorcycle swingarm as claimed in claim 1, characterized in that: A fourth through hole is provided on the right side of the lower end of the front frame body, a fourth screw hole is provided on the inner side of the front end of the right frame body, and the second reverse screw passes through the fourth through hole and is screwed and fixed with the fourth screw hole.

7. A motorcycle swingarm as claimed in claim 1, characterized in that: A caliper bracket for installing a radiation caliper is arranged on the inner side of the right frame.

8. A motorcycle swingarm as claimed in claim 1, characterized in that: The rear end of the left frame is provided with a first adjusting member that can be adjusted forward and backward, and a first mounting hole is opened on the first adjusting member. The rear end of the right frame is provided with a second adjusting member that can be adjusted forward and backward, and a second mounting hole is opened on the second adjusting member. Both ends of the rear axle body are respectively inserted into the first mounting hole and the second mounting hole and are fixedly connected to the first adjusting member and the second adjusting member through nut members.

9. A motorcycle swing arm as claimed in claim 8, characterized in that: The rear end outer side surface of the left frame is concavely provided with a first accommodating groove, and the rear end surface of the left frame is opened with a first through hole, the first through hole is connected to the first accommodating groove, the first adjusting member is provided with a first adjusting screw, the first adjusting member is arranged in the first accommodating groove and moves forward and backward along the first accommodating groove, the first adjusting screw passes through the first through hole to extend outward from the rear end surface of the left frame and is threadedly connected with a first nut.

10. A motorcycle swing arm as claimed in claim 8, characterized in that: A second accommodating groove is recessed on the outer side surface of the rear end of the right frame, and a second through-hole is opened on the rear end surface of the right frame, the second through-hole is connected to the second accommodating groove, and a second adjusting member is provided with a second adjusting screw, which is arranged in the second accommodating groove and moves forward and backward along the second accommodating groove. The second adjusting screw extends outward through the second through-hole to the rear end surface of the right frame and is threadedly connected with a second nut.

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