Rear damping mechanism of cross-country motorcycle

Abstract

The rear damping mechanism of the cross-country motorcycle comprises a motorcycle frame and a rear fork connected to the motorcycle frame in a pivoted mode, the motorcycle frame is further provided with a first connecting point and a second connecting point, and the rear fork is further provided with a third connecting point; the third connecting point is used for being connected with the middle end of a first connecting rod in a pivoted mode, and a fourth connecting point and a fifth connecting point are arranged at the two ends of the first connecting rod respectively. A shock absorber is arranged between the first connecting point and the fifth connecting point, and a second connecting rod is arranged between the second connecting point and the fourth connecting point; the first connecting point, the second connecting point, the fourth connecting point, the third connecting point and the fifth connecting point are connected in sequence to form a line profile which is a quadrangle; the first connecting rod is subjected to acting force generated after the rear fork deflects, and the acting force is progressively dispersed to the second connecting rod till the acting force is transmitted to the shock absorber.

Description

Technical Field

[0001] This application relates to the field of motorcycles, and in particular to the rear shock absorber mechanism of off-road motorcycles. Background Technology

[0002] A common motorcycle rear shock absorber system can be found in the off-road motorcycle rear shock absorber connection structure proposed in Chinese patent application CN2008200510697. Specifically, it includes a frame [1], a rear shock absorber [2], a rear swingarm [3], a rocker arm [4], and a tie rod [5]. The upper end of the rear shock absorber [2] is connected to the frame [1] via a fourth axle pin [7]. The rear swingarm [3] is connected to the frame [1] via a fifth axle pin [8]. The tie rod... [5] The rocker arm [4] is connected to the frame [1] by the sixth axle pin [9]. The rotation hinge of the rocker arm [4] is the third axle pin [6c]. The third axle pin [6c] is arranged on the rear swingarm [3]. Since the main structure of the rocker arm [4] is arranged on the rear swingarm [3] and above it, the rocker arm ratio of the rocker arm [4] can be made relatively large. At the same time, the relative swing amplitude between the rear shock absorber [2] and the frame [1] is small during the entire working period. Therefore, the rear shock absorber [2] is in good stress condition and is arranged compactly.

[0003] The purpose of this application is to improve a new rear shock absorption method to enhance shock absorption performance.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides a rear shock absorber for off-road motorcycles.

[0006] The technical solution adopted by this application to solve its technical problem is: a rear shock absorber mechanism for off-road motorcycles, including a frame and a rear fork pivotally connected to the frame, wherein the frame is also provided with a first connection point and a second connection point, and the rear fork is also provided with a third connection point;

[0007] The third connection point is used to pivotally connect the middle end of the first link, and the two ends of the first link are respectively provided with a fourth connection point and a fifth connection point;

[0008] A shock absorber is provided between the first connection point and the fifth connection point, and a second connecting rod is provided between the second connection point and the fourth connection point;

[0009] The line outline formed by connecting the first connection point, the second connection point, the fourth connection point, the third connection point, and the fifth connection point in sequence is a quadrilateral.

[0010] The first connecting rod is subjected to the force of the rear fork swaying and the force is progressively distributed to the second connecting rod until it is transmitted to the shock absorber.

[0011] In some embodiments, the first link and the second connection point are non-rotational connections.

[0012] In some embodiments, the first link and the fourth rotation point are rotatably connected.

[0013] In some embodiments, the two ends of the shock absorber are rotatably connected to the first connection point and the fifth connection point.

[0014] In some embodiments, the second link is generally L-shaped.

[0015] In some embodiments, the shock absorber is a hydraulic shock absorber with a spring.

[0016] In some embodiments, the shock absorber includes a piston sleeve, a telescopic rod, a return spring, and a liquid reservoir;

[0017] The first end of the telescopic rod is connected to the fifth connection point, and the second end is provided with a piston that extends into the piston sleeve and moves.

[0018] The reset spring is sleeved around the piston sleeve and the telescopic rod to drive the telescopic rod back to its original position.

[0019] The liquid storage tank and the piston sleeve are spaced apart, and a flow channel is provided between the liquid storage tank and the piston sleeve for the flow of hydraulic oil.

[0020] In some embodiments, the opening of the liquid storage tank is sealed by a sealing structure, which includes a sealing cover, a sealing plug, a locking cover, and a locking screw. The sealing cover is sealed and fastened to the opening of the liquid storage tank. A through hole is provided in the middle of the sealing cover, and the through hole is sealed by the sealing plug. The locking cover is threadedly connected to the sealing cover and restricts the sealing plug. The locking screw is threadedly connected to the locking cover. Sealing rings are provided between the sealing cover and the inner wall of the liquid storage tank, between the locking cover and the sealing plug, and between the locking screw and the locking cover.

[0021] The beneficial effect of this application is that by setting two connecting rods in different positions, namely the first connecting rod and the second connecting rod, when vibration reduction is required, by means of the quadrilateral principle, the first connecting rod is subjected to the force of the rear fork after swaying and the force is progressively distributed to the second connecting rod until it is transmitted to the shock absorber, forming a two-stage force, thereby obtaining a better vibration reduction effect. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a front structural diagram of this application.

[0024] Figure 2 This is a schematic diagram of the elevation structure of this application.

[0025] Figure 3 This is a schematic diagram of the internal structure of the shock absorber and liquid storage tank of this application.

[0026] Illustrations and symbols: 1. Frame, 2. Rear fork, 31. First connection point, 32. Second connection point, 33. Third connection point, 34. Fourth connection point, 35. Fifth connection point, 4. Shock absorber, 41. Piston sleeve, 42. Telescopic rod, 43. Return spring, 44. Reservoir, 45. Flow channel, 46. Piston, 5. First connecting rod, 6. Second connecting rod, 7. Sealing structure, 71. Sealing cap, 72. Sealing plug, 73. Locking cap, 74. Locking screw, 8. Line outline. Detailed Implementation

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

[0028] In the embodiments of this application, please refer to Figure 1-3 As shown, this application provides a rear shock absorber mechanism for an off-road motorcycle, including a frame and a rear fork pivotally connected to the frame. The frame is also provided with a first connection point and a second connection point, and the rear fork is also provided with a third connection point.

[0029] The third connection point is used to pivotally connect the middle end of the first link, and the two ends of the first link are respectively provided with a fourth connection point and a fifth connection point;

[0030] A shock absorber is provided between the first connection point and the fifth connection point, and a second connecting rod is provided between the second connection point and the fourth connection point;

[0031] The line outline formed by connecting the first connection point, the second connection point, the fourth connection point, the third connection point, and the fifth connection point in sequence is a quadrilateral.

[0032] The first connecting rod is subjected to the force of the rear fork swaying and the force is progressively distributed to the second connecting rod until it is transmitted to the shock absorber.

[0033] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0034] Preferably, the first connecting rod and the fourth rotation point are rotatably connected. Both ends of the shock absorber are rotatably connected to the first connection point and the fifth connection point.

[0035] Preferably, the first link and the second connection point are connected in a non-rotational manner. Specifically, the front end of the first link and the second connection point are respectively provided with staggered steps, and the two steps interlock to achieve non-rotation. This configuration allows the force on the rear end of the first link to be transmitted more directly to the second link.

[0036] Preferably, the second link is approximately L-shaped.

[0037] As one method, the shock absorber is a hydraulic shock absorber with a spring.

[0038] Furthermore, the shock absorber includes a piston sleeve, a telescopic rod, a return spring, and a reservoir; the first end of the telescopic rod is connected to the fifth connection point, and the second end is provided with a piston that extends into the piston sleeve and moves; the return spring is sleeved around the piston sleeve and the telescopic rod to drive the telescopic rod back to its original position; the reservoir is spaced apart from the piston sleeve, and a flow channel is provided between the reservoir and the piston sleeve for the flow of hydraulic oil.

[0039] Furthermore, the opening of the liquid storage tank is sealed by a sealing structure, which includes a sealing cap, a sealing plug, a locking cap, and a locking screw. The sealing cap is securely fastened to the opening of the liquid storage tank, and a through hole is provided in the middle of the sealing cap. The through hole is sealed by the sealing plug. The locking cap is threaded onto the sealing cap and restricts the sealing plug. The locking screw is threaded onto the locking cap. Sealing rings are provided between the sealing cap and the inner wall of the liquid storage tank, between the locking cap and the sealing plug, and between the locking screw and the locking cap. This allows for the adjustment or replenishment of the oil level in the liquid storage tank.

[0040] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A rear shock absorber mechanism for an off-road motorcycle, comprising a frame and a rear fork pivotally connected to the frame, characterized in that, The frame is also provided with a first connection point and a second connection point, and the rear fork is also provided with a third connection point; The third connection point is used to pivotally connect the middle end of the first link, and the two ends of the first link are respectively provided with a fourth connection point and a fifth connection point; A shock absorber is provided between the first connection point and the fifth connection point, and a second connecting rod is provided between the second connection point and the fourth connection point; The line outline formed by connecting the first connection point, the second connection point, the fourth connection point, the third connection point, and the fifth connection point in sequence is a quadrilateral. The first connecting rod is subjected to the force of the rear fork swaying and the force is progressively distributed to the second connecting rod until it is transmitted to the shock absorber.

2. The rear shock absorber mechanism for an off-road motorcycle according to claim 1, characterized in that, The first connecting rod and the second connection point are connected in a non-rotational manner.

3. The rear shock absorber mechanism for an off-road motorcycle according to claim 1, characterized in that, The first connecting rod and the fourth rotation point are connected by a rotation.

4. The rear shock absorber mechanism for an off-road motorcycle according to claim 1, characterized in that, The two ends of the shock absorber are rotatably connected to the first connection point and the fifth connection point.

5. The rear shock absorber mechanism for an off-road motorcycle according to claim 1 or 4, characterized in that, The second link is roughly L-shaped.

6. The rear shock absorber mechanism for an off-road motorcycle according to claim 1, characterized in that, The shock absorber is a hydraulic shock absorber with a spring.

7. The rear shock absorber mechanism for an off-road motorcycle according to claim 6, characterized in that, The shock absorber includes a piston sleeve, a telescopic rod, a return spring, and a liquid reservoir; The first end of the telescopic rod is connected to the fifth connection point, and the second end is provided with a piston that extends into the piston sleeve and moves. The reset spring is sleeved around the piston sleeve and the telescopic rod to drive the telescopic rod back to its original position. The liquid storage tank and the piston sleeve are spaced apart, and a flow channel is provided between the liquid storage tank and the piston sleeve for the flow of hydraulic oil.

8. The rear shock absorber mechanism for an off-road motorcycle according to claim 7, characterized in that, The opening of the liquid storage tank is sealed by a sealing structure, which includes a sealing cover, a sealing plug, a locking cover, and a locking screw. The sealing cover is sealed and fastened to the opening of the liquid storage tank. A through hole is provided in the middle of the sealing cover, and the through hole is sealed by the sealing plug. The locking cover is threaded onto the sealing cover and restricts the sealing plug. The locking screw is threaded onto the locking cover. Sealing rings are provided between the sealing cover and the inner wall of the liquid storage tank, between the locking cover and the sealing plug, and between the locking screw and the locking cover.

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