Motorcycle and rear suspension four-link mechanism thereof

Abstract

The invention relates to a motorcycle and a rear suspension four-bar linkage mechanism thereof. The motorcycle rear suspension four-bar linkage mechanism comprises a pull rod, a swing arm lever and a shock absorber, wherein a first end of the pull rod and a first end of the shock absorber are rotatably connected to a vehicle frame respectively, a second end of the pull rod and a second end of the shock absorber are rotatably connected to two ends of the swing arm lever respectively, the swing arm lever is rotatably connected to a rear fork, and connection points on the swing arm lever for rotatably connecting with the pull rod, the shock absorber and the rear fork are distributed in a triangular shape; the motorcycle rear suspension four-bar linkage mechanism can nonlinearly increase the stroke of the shock absorber through the swing arm lever, so that the stiffness characteristics and damping characteristics of the rear suspension are nonlinearly changed and can change with changes in external impact and vibration, that is, the rear suspension becomes "soft" under weak impact and becomes "hard" under strong impact, thereby improving the comfort of the motorcycle.

Description

Technical Field

[0001] The invention relates to the technical field of motorcycles, in particular to a motorcycle and a rear suspension four-link mechanism thereof. Background Art

[0002] The rear suspension device of a motorcycle is a mechanism that elastically connects the wheel to the body of the motorcycle. Its function is to suppress the vibration and impact caused by uneven road surface from being transmitted to the motorcycle body, improve riding comfort, keep the tire and the road surface in optimal contact at all times, and generate the motorcycle's driving force, braking force, lateral force, etc. between the tire and the road surface, thereby ensuring the normal operation and driving stability of the motorcycle.

[0003] However, the stiffness and damping characteristics of the shock absorber of the existing rear suspension device are linear, and it is difficult to change with the changes of external impact and vibration, which affects the comfort of the motorcycle. Summary of the invention

[0004] The first object of the present invention is to provide a motorcycle rear suspension four-link mechanism so that its stiffness characteristics and damping characteristics change nonlinearly and can change with external impact and vibration, thereby improving the comfort of the motorcycle.

[0005] A second object of the present invention is to provide a motorcycle based on the above-mentioned motorcycle rear suspension four-link mechanism.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A motorcycle rear suspension four-link mechanism comprises a pull rod, a swing arm lever and a shock absorber, wherein the first end of the pull rod and the first end of the shock absorber are rotatably connected to a frame respectively, the second end of the pull rod and the second end of the shock absorber are rotatably connected to two ends of the swing arm lever respectively, the swing arm lever is rotatably connected to a rear fork, and the connection points on the swing arm lever for rotatably connecting to the pull rod, the shock absorber and the rear fork are distributed in a triangular shape.

[0008] Preferably, the pull rod includes a sleeve and two rods arranged in parallel, the first ends of the two rods cooperate with the sleeve and are rotatably connected to the frame through the sleeve, and the second ends of the two rods are rotatably connected to the swing arm levers respectively.

[0009] Preferably, the swing arm lever comprises a V-shaped body, both side ends of the V-shaped body are rotatably connected to the second end of the pull rod and the second end of the shock absorber respectively, and the middle corner portion of the V-shaped body is rotatably connected to the rear fork.

[0010] Preferably, the rear flat fork comprises a rear flat fork left arm, a rear flat fork right arm and a middle connecting plate, the rear flat fork left arm and the rear flat fork right arm are connected via the middle connecting plate, and the swing arm lever is rotatably connected to the middle connecting plate.

[0011] Preferably, the longitudinal cross-section of the middle connecting plate is L-shaped.

[0012] Preferably, the transverse connecting portion and / or the longitudinal connecting portion of the intermediate connecting plate is in a box-type structure.

[0013] Preferably, two mounting seats are provided on the intermediate connecting plate, a mounting groove is formed between the two mounting seats, and the swing arm lever is rotatably connected to the intermediate connecting plate in the mounting groove.

[0014] A motorcycle comprises the motorcycle rear suspension four-link mechanism as described in any one of the above.

[0015] It can be seen from the above technical scheme that the present invention discloses a motorcycle rear suspension four-bar linkage, which includes a pull rod, a swing arm lever and a shock absorber, wherein the first end of the pull rod and the first end of the shock absorber are rotatably connected to the frame respectively, the second end of the pull rod and the second end of the shock absorber are rotatably connected to the two ends of the swing arm lever respectively, the swing arm lever is rotatably connected to the rear fork, and the connection points on the swing arm lever for rotatably connecting with the pull rod, the shock absorber and the rear fork are triangularly distributed; the above-mentioned motorcycle rear suspension four-bar linkage can nonlinearly increase the stroke of the shock absorber through the swing arm lever, so that the stiffness characteristics and damping characteristics of the rear suspension change nonlinearly, and can change with the changes of external impact and vibration, that is, the rear suspension becomes "soft" under weak impact, and the rear suspension becomes "hard" under strong impact, thereby improving the comfort of the motorcycle.

[0016] The present invention also provides a motorcycle, comprising the motorcycle rear suspension four-bar linkage as described above. Since the motorcycle adopts the motorcycle rear suspension four-bar linkage, the motorcycle has the beneficial effects of the motorcycle rear suspension four-bar linkage, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a motorcycle rear suspension four-link mechanism provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the assembly structure of a motorcycle rear suspension four-link mechanism provided by an embodiment of the present invention;

[0020] Figure 3 A partial cross-sectional view of the assembly structure of the motorcycle rear suspension four-link mechanism provided by an embodiment of the present invention.

[0021] in:

[0022] 1 is a pull rod; 2 is a swing arm lever; 3 is a shock absorber; 4 is a bushing; 5 is a rear fork; 501 is a left arm of the rear fork; 502 is a right arm of the rear fork; 503 is a middle connecting plate. DETAILED DESCRIPTION

[0023] One of the cores of the present invention is to provide a motorcycle rear suspension four-link mechanism to achieve the purpose of making its stiffness characteristics and damping characteristics change nonlinearly, and being able to change with external impact and vibration, thereby improving the comfort of the motorcycle.

[0024] Another core of the present invention is to provide a motorcycle based on the above-mentioned motorcycle rear suspension four-bar linkage mechanism.

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 3 , Figure 1 A schematic diagram of the structure of a motorcycle rear suspension four-link mechanism provided by an embodiment of the present invention; Figure 2 A schematic diagram of the assembly structure of a motorcycle rear suspension four-link mechanism provided by an embodiment of the present invention; Figure 3 A partial cross-sectional view of the assembly structure of the motorcycle rear suspension four-link mechanism provided by an embodiment of the present invention.

[0027] The embodiment of the present invention discloses a motorcycle rear suspension four-bar linkage, which comprises a pull rod 1, a swing arm lever 2 and a shock absorber 3.

[0028] Among them, the first end of the pull rod 1 and the first end of the shock absorber 3 are rotatably connected to the frame respectively, the second end of the pull rod 1 and the second end of the shock absorber 3 are rotatably connected to the two ends of the swing arm lever 2 respectively, the swing arm lever 2 is rotatably connected to the rear fork 5, and the connection points on the swing arm lever 2 for rotatably connecting with the pull rod 1, the shock absorber 3 and the rear fork 5 are distributed in a triangular shape.

[0029] It can be seen that compared with the prior art, the motorcycle rear suspension four-link mechanism provided in the embodiment of the present invention can nonlinearly increase the stroke of the shock absorber 3 through the swing arm lever 2, so that the stiffness characteristics and damping characteristics of the rear suspension change nonlinearly, and can change with the changes of external impact and vibration, that is, the rear suspension becomes "soft" under weak impact and becomes "hard" under strong impact, thereby improving the comfort of the motorcycle.

[0030] Preferably, in an embodiment of the present invention, the above-mentioned pull rod 1 includes a sleeve 4 and two rod members arranged in parallel and side by side, the first ends of the two rod members are matched with the sleeve 4 and are rotatably connected to the frame through the sleeve 4, and the second ends of the two rod members are rotatably connected to the swing arm lever 2 respectively.

[0031] Of course, the above-mentioned pull rod 1 structure is only a preferred implementation scheme provided by the embodiment of the present invention. In other embodiments, the pull rod 1 can also be an integrated structure.

[0032] Preferably, in an embodiment of the present invention, Figure 1 As shown, the swing arm lever 2 includes a V-shaped body, both side ends of the V-shaped body are rotatably connected to the second end of the pull rod 1 and the second end of the shock absorber 3 respectively, and the middle corner of the V-shaped body is rotatably connected to the rear fork 5.

[0033] Preferably, if Figure 2 and Figure 3 As shown, the rear fork 5 includes a rear fork left arm 501, a rear fork right arm 502 and a middle connecting plate 503, wherein the rear fork left arm 501 is symmetrical or approximately symmetrical with the rear fork right arm 502 to make the mass distribution more reasonable, the rear fork left arm 501 and the rear fork right arm 502 are connected by the middle connecting plate 503, and the middle connecting plate 503 is a plate-like structure to improve the overall torsional stiffness, and the swing arm lever 2 is rotatably connected to the middle connecting plate 503.

[0034] Further optimize the above technical solution, such as Figure 3 As shown, the longitudinal cross-section of the middle connecting plate 503 is L-shaped, and the transverse connecting portion and / or the longitudinal connecting portion of the middle connecting plate 503 is a box-type structure. The above structure can effectively increase the strength of the middle connecting plate 503 itself and the overall torsional strength of the rear fork 5.

[0035] As preferably, Figure 3 As shown, two mounting seats are arranged on the middle connecting plate 503, and a mounting groove is formed between the two mounting seats. The swing arm lever 2 is rotatably connected to the middle connecting plate 503 in the mounting groove.

[0036] Based on the above-mentioned motorcycle rear suspension four-bar linkage, an embodiment of the present invention further provides a motorcycle, including the above-mentioned motorcycle rear suspension four-bar linkage. Since the motorcycle adopts the above-mentioned motorcycle rear suspension four-bar linkage, please refer to the above-mentioned embodiment for the beneficial effects of the motorcycle.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0038] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motorcycle rear suspension four-bar linkage, characterized in that: The invention comprises a pull rod, a swing arm lever and a shock absorber, wherein the first end of the pull rod and the first end of the shock absorber are rotatably connected to the frame respectively, the second end of the pull rod and the second end of the shock absorber are rotatably connected to the two ends of the swing arm lever respectively, the swing arm lever is rotatably connected to the rear fork, the connection points on the swing arm lever for rotatably connecting with the pull rod, the shock absorber and the rear fork are distributed in a triangular shape, the swing arm lever comprises a V-shaped body, the two side ends of the V-shaped body are rotatably connected to the second end of the pull rod and the second end of the shock absorber respectively, the middle corner of the V-shaped body is rotatably connected to the rear fork The rear flat fork is dynamically connected, the rear flat fork comprises a rear flat fork left arm, a rear flat fork right arm and an intermediate connecting plate, the rear flat fork left arm and the rear flat fork right arm are connected through the intermediate connecting plate, the swing arm lever is rotatably connected to the intermediate connecting plate, the longitudinal section of the intermediate connecting plate is L-shaped, the intermediate connecting plate comprises a transverse connecting part and a longitudinal connecting part, the transverse connecting part of the intermediate connecting plate is a box-type structure; the rear flat fork left arm, the rear flat fork right arm and the intermediate connecting plate jointly define a receiving groove, the connection point of the swing arm lever and the shock absorber, and the connection point of the swing arm lever and the pull rod are both located in the receiving groove.

2. The motorcycle rear suspension four-link mechanism according to claim 1, characterized in that: The pull rod includes a shaft sleeve and two rods arranged in parallel and side by side. The first ends of the two rods are matched with the shaft sleeve and are rotatably connected to the frame through the shaft sleeve. The second ends of the two rods are rotatably connected to the swing arm levers respectively.

3. The motorcycle rear suspension four-link mechanism according to claim 1, characterized in that: The middle connecting plate is provided with two mounting seats, a mounting groove is formed between the two mounting seats, and the swing arm lever is rotatably connected to the middle connecting plate in the mounting groove.

4. A motorcycle, characterized in that: It comprises a motorcycle rear suspension four-link mechanism as described in any one of claims 1 to 3.

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