Motorcycle rear suspension device

Abstract

The invention relates to a rear suspension device of a motorcycle, the motorcycle at least comprises a frame unit, the frame unit is provided with a power unit, and the power unit is provided with a transmission shaft for outputting power; the motorcycle is provided with a rear suspension device, a rear axle is pivoted on the rear suspension device, a rear wheel is arranged on the rear axle, and the transmission shaft drives the rear wheel through a driving piece. The rear suspension device is provided with a rear rocker arm pivoted on the power unit, a first connecting rod pivoted on the rear rocker arm, a second connecting rod pivoted on the first connecting rod and the frame unit, and a rear shock absorber pivoted on the other end of the first connecting rod and the other end of the frame unit; the rear shock absorber and the driving piece are located on the same side of the rear wheel, and the rear shock absorber is slightly parallel to the rear rocker arm and arranged in the length direction of the rear rocker arm. Therefore, on one hand, the storage space of the storage box is increased, and the driving comfort of the motorcycle is improved; on the other hand, the buffering stroke of the rear shock absorber can be increased to improve the shock absorption effect of the shock absorber.

Description

Technical Field

[0001] The invention relates to a motorcycle rear suspension device, and in particular to a motorcycle rear suspension device which can increase the buffering stroke of a rear shock absorber to enhance the shock absorbing effect of the shock absorber. Background Art

[0002] like Figure 1 As shown, the power unit 11 of the motorcycle 1 is provided with a rear suspension device 12 toward the rear of the vehicle body; the rear suspension device 12 comprises a rear swing arm 121 pivotally mounted on the power unit 11 and a rear shock absorber 122 disposed above the rear swing arm 121; a rear wheel 13 is pivotally mounted at the rear end of the rear swing arm 121, a front end portion 1221 of the rear shock absorber 122 toward the front of the vehicle body is connected to the frame unit 14, and a rear end portion 1222 of the rear shock absorber 122 toward the rear of the vehicle body is connected to the rear swing arm 121; the rear suspension device 12 is constructed in a four-link manner, and when the motorcycle 1 travels on an uneven badland, the rear shock absorber 122 shrinks and contracts by feedback from the uneven badland received by the rear wheel 13, so as to absorb the vibration of the uneven badland, thereby reducing the discomfort of the driver.

[0003] However, the conventional rear suspension device 12 is a four-link structure, so the feedback force from the uneven terrain to the rear wheel 13 is linear, that is, the driver feels direct feedback from the uneven terrain to the rear wheel 13, which actually makes the driver feel extremely uncomfortable.

[0004] Therefore, how to provide a motorcycle rear suspension device to improve the driver's comfort and vehicle controllability when the motorcycle is traveling on bad land has become an urgent issue to be solved by the vehicle industry. Summary of the invention

[0005] [Problems to be solved by the invention]

[0006] The main purpose of the present invention is to provide a motorcycle rear suspension device, which mainly aims to increase the buffering stroke of the rear shock absorber to improve the shock absorbing effect of the rear shock absorber.

[0007] [Technical means to solve the problem]

[0008] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, the motorcycle at least includes a frame unit, the frame unit is provided with a power unit, the power unit has a transmission shaft for outputting power; the motorcycle is provided with a rear suspension device, the rear suspension device is pivotally provided with a rear wheel axle, the rear wheel axle is provided with a rear wheel, and the transmission shaft drives the rear wheel through a driving member; the rear suspension device has a rear swing arm pivoted on the power unit, a first connecting rod pivoted on the rear swing arm, a second connecting rod pivoted between the first connecting rod and the frame unit, and a rear shock absorber pivoted between the other end of the first connecting rod and the other end of the frame unit; the rear shock absorber and the driving member are located on the same side of the rear wheel, and the rear shock absorber is slightly parallel to the rear swing arm and is arranged along the length of the rear swing arm.

[0009] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, wherein the rear swing arm has a left arm portion and a right arm portion; the first connecting rod, the second connecting rod and the rear shock absorber are located above the left arm portion of the rear swing arm.

[0010] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, wherein when viewed from the side of the motorcycle body, the rear shock absorber, the first connecting rod, the second connecting rod and the rear wheel overlap.

[0011] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, wherein when viewed from above the motorcycle body, the rear shock absorber, the rear swing arm and the frame unit at least partially overlap.

[0012] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, wherein, viewed from the side of the vehicle body, the central axis of the front pivot end of the rear shock absorber along the vertical direction of the vehicle body is adjacent to the central axis of the front pivot end of the rear swing arm along the vertical direction of the vehicle body, and the central axis of the rear pivot end of the rear shock absorber along the vertical direction of the vehicle body is adjacent to the central axis of the rear pivot end of the rear swing arm along the vertical direction of the vehicle body.

[0013] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, the motorcycle is further provided with a storage box; when viewed from the side of the vehicle body, the front end of the rear shock absorber overlaps with the storage box, and the rear end of the rear shock absorber overlaps with the wheel frame of the rear wheel.

[0014] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, wherein the rear shock absorber, the first connecting rod and the second connecting rod are located above the center line between the front end pivot of the rear swing arm and the rear wheel axle; the rear shock absorber is arranged slightly parallel to the center line.

[0015] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, wherein the first connecting rod is a two-piece rod body.

[0016] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, the motorcycle is further provided with a storage box; the rear shock absorber is located on the side of the storage box, and the bottom of the storage box extends downward to below the front end of the rear shock absorber.

[0017] To this end, some technical means of the present invention are to provide a motorcycle rear suspension device, wherein the rear swing arm has a left arm portion and a right arm portion; and an avoidance recess is provided above the left arm portion.

[0018] [Effects of the invention]

[0019] The present invention can achieve the following effects by means of some technical means: on the one hand, the space above the rear swing arm can be fully utilized, thereby increasing the storage space of the storage box, and by means of the multi-link mechanism composed of the first link, the second link, and the rear shock absorber, and by means of the nonlinear force ratio characteristic of the multi-link mechanism, the riding comfort of the motorcycle is improved; on the other hand, by means of the rear shock absorber being arranged slightly parallel to the rear swing arm, the buffer stroke of the rear shock absorber can be increased to improve the shock absorption effect of the rear shock absorber.

[0020] The present invention can achieve the effect of fully utilizing the space above the rear rocker arm by means of some technical means.

[0021] The present invention can achieve the effect of fully utilizing the space above the rear swing arm and the side of the rear wheel by means of some technical means.

[0022] The present invention can achieve the effect of, by means of some technical means, the first connecting rod, the second connecting rod and the rear shock absorber are all located on the outer side of the storage box, thereby increasing the storage space of the storage box.

[0023] The present invention can achieve the effect of using some technical means: the rear shock absorber can be arranged slightly parallel to the rear swing arm, thereby increasing the buffer stroke of the rear shock absorber to enhance the shock absorbing effect of the rear shock absorber.

[0024] The present invention can achieve the effect of, by means of some technical means, moving the rear end of the rear shock absorber away from the rear wheel axle, so that the rear shock absorber can be extended and arranged slightly parallel to the rear swing arm.

[0025] The present invention can achieve the effect of using some technical means: the space above the rear rocker arm can be fully utilized, and the buffer stroke of the rear shock absorber can be increased to enhance the shock absorbing effect of the rear shock absorber.

[0026] The present invention can achieve the effect of facilitating the assembly of the first connecting rod by means of some technical means.

[0027] The present invention can achieve the effect of increasing the storage space of the storage box by using some technical means.

[0028] The present invention can achieve the effect of preventing the pivotal joint between the first link and the second link from colliding with the rear swing arm by means of some technical means. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a rear suspension device of an existing motorcycle.

[0030] Figure 2 It is a schematic diagram of a motorcycle without a body cover according to the present invention.

[0031] Figure 3 It is a schematic top view of a motorcycle of the present invention.

[0032] Figure 4 It is a stereoscopic view of the rear suspension device of the present invention.

[0033] Figure 5 It is a top view of the rear suspension device of the present invention.

[0034] Figure 6 , 7 It is a schematic diagram of the operation of the rear suspension device of the present invention.

[0035] Reference numerals list

[0036] 1. Motorcycle

[0037] 11: Power Unit

[0038] 12: Rear suspension

[0039] 121: Swingarm

[0040] 122: Rear shock absorber

[0041] 1221: front end 1222: rear end

[0042] 13: Rear wheel 14: Frame unit

[0043] 2. Motorcycle

[0044] 3: Frame unit

[0045] 31: Head pipe 32: Steering mechanism

[0046] 33: Front fork unit 34: Main tube

[0047] 35: Side frame

[0048] 351: Connector 352: First connecting part

[0049] 353: Second connection

[0050] 4: Power unit

[0051] 41: Cylinder

[0052] 42: Transmission

[0053] 421: Transmission shaft 422: Driving member

[0054] 423: Passive gear 424: Rear wheel axle

[0055] 5: Fuel tank

[0056] 6: Rear suspension

[0057] 61: Swingarm

[0058] 611: front end 612: avoidance recess

[0059] 613: Pivot

[0060] 61a: left arm 61b: right arm

[0061] 62: First connecting rod

[0062] 621: first pivot portion 622: second pivot portion

[0063] 63: Second connecting rod

[0064] 64: Rear shock absorber

[0065] 7: Seat cushion

[0066] 8: Body cover unit

[0067] 81: hood 82: front body cover

[0068] 83: Knee cover 84: Footrest

[0069] 85: Side body cover

[0070] A: Center connection

[0071] B, B1: Central axis

[0072] C, C1: Central axis

[0073] D: Exhaust

[0074] E: Space

[0075] T: Storage box

[0076] FW: front wheel

[0077] RW: rear wheel RW1: wheel frame. DETAILED DESCRIPTION

[0078] In order to make it easier to understand the structure and effects of the present invention, the following description is provided in conjunction with the accompanying drawings.

[0079] First, see Figure 2 , 3 As shown, the motorcycle 2 of the present invention has a frame unit 3, a head pipe 31 is provided in front of the frame unit 3, a steering mechanism 32 is provided on the head pipe 31, a front fork unit (front shock absorber) 33 is connected to the lower part of the steering mechanism 32, and a front wheel FW is pivotally provided at the lower part of the front fork unit 33; a main pipe 34 is extended from the head pipe 31 toward the lower rear of the vehicle body, and a pair of left and right side frames 35 are provided on the main pipe 34 toward the rear of the vehicle body, a power unit 4 is pivotally provided at the lower rear of the main pipe 34 and the lower front of the side frames 35, and the power unit 4 is arranged in a slightly horizontal manner toward the front of the vehicle body; a fuel tank 5 for storing fuel is provided at the upper rear of the main pipe 34 and the upper front of the side frames 35, and at the upper front of the power unit 4; the power unit 4 and the frame unit 3 are pivotally connected to a rear suspension device 6, and a rear end of the rear suspension device 6 is pivotally provided with a rear wheel RW.

[0080] like Figure 2 , 3 As shown; the motorcycle 2 is provided with a seat 7 for the driver and the passenger to sit on behind the steering mechanism 32 and above the rear wheel RW, the seat 7 is spaced apart from the steering mechanism 32, and a storage box T for the driver to place his / her belongings is provided below the seat 7; a body cover unit 8 is provided on the periphery of the motorcycle 2, the body cover unit 8 has a front cover 81 covering the steering mechanism 32, a front body cover 82 provided below the front cover 81 and covering the front end of the body, and a knee cover 83 provided behind the front body cover 82, a foot pedal 84 provided below between the steering mechanism 32 and the seat 7, and side body covers 85 are provided on both sides below the seat 7 of the motorcycle 2; the knee cover 83 has an inclined recessed space E between the seat 7 and the rear of the body, the space E can be used for the installation of other components or for the knee cover 83 to increase the space for the installation of physical facilities.

[0081] like Figure 2 , 3 As shown, the side frame 35 of the frame unit 3 of the motorcycle 2 is provided with a connecting member 351 at the rear of the fuel tank 5, that is, the side frame 35 of the fuel tank 5 toward the rear of the vehicle body is downwardly connected. The connecting member 351 has a first connecting portion 352 and a second connecting portion 353.

[0082] like Figure 2 , 4As shown in Figures 5 and 6, the rear suspension device 6 comprises a slightly U-shaped rear swing arm 61 pivoted on the power unit 4, a first connecting rod 62 pivoted on the rear swing arm 61, a second connecting rod 63 pivoted between the first connecting rod 62 and the connecting member 351 of the frame unit 3, and a rear shock absorber 64 pivoted between the other end of the first connecting rod 62 and the other end of the connecting member 351 of the frame unit 3.

[0083] like Figure 2 , 4 5, the power unit 4 has a cylinder part 41 for internal combustion and explosion, and a transmission part 42 which can be driven by the cylinder part 41; the power unit 4 is arranged slightly horizontally with the cylinder part 41 facing the front of the vehicle body, whereby the fuel tank 5 is arranged above the cylinder part 41, the seat cushion 7 is arranged behind the fuel tank 5, and the storage box T is arranged below the seat cushion 7; the transmission part 42 has a transmission shaft 421 for transmitting power, and the transmission shaft 421 can drive a driven gear 423 arranged on the rear wheel RW to drive the rear wheel RW to rotate by driving a member 422, and the present invention can be implemented by a belt or a chain; the rear swing arm 61 has a left arm part 61a and a right arm part 61b; the two sides of the front end 611 of the rear swing arm 61 are pivotally arranged on the power unit 4 The transmission part 42 is on the transmission part 42, and the axis of the transmission shaft 421 along the left-right direction of the vehicle body is used as the swing center to swing up and down along the up-down direction of the vehicle body; the rear end of the rear swing arm 61 is pivotally provided with the rear wheel RW, and the rear wheel RW is pivotally provided on the rear end of the rear swing arm 61 by means of the rear wheel shaft 424, and the left arm part 61a of the rear swing arm 61 is concavely provided with an avoidance recess 612 adjacent to the upper part where the rear wheel RW is pivoted; the rear swing arm 61 is further provided with a pivoting part 613 toward the rear of the vehicle body at the avoidance recess 612, and the pivoting part 613 of the present invention is implemented by a protrusion with a pivot hole protruding toward the upper part of the vehicle body, and the pivoting part 613 can be pivoted for the first connecting rod 62; the pivoting part 613 of the present invention is arranged on the left side in the left-right direction of the vehicle body, that is, on the left arm part 61a of the rear swing arm 61.

[0084] like Figure 2 , 4 As shown in Figures 5 and 6, the first link 62 is pivoted on the pivot portion 613 of the rear swing arm 61, so that the first link 62 can swing freely with the pivot portion 613 as the swing center; the two ends of the first link 62 respectively have a first pivot portion 621 and a second pivot portion 622; the first link 62 of the present invention is implemented as a two-piece, slightly triangular rod body.

[0085] like Figure 2 , 4As shown in Figures 5, 6 and 7, the front end of the second link 63 (toward the front end of the vehicle body) is connected to the second connecting portion 353 of the connecting piece 351 of the side frame 35 of the frame unit 3, and the rear end of the second link 63 (toward the rear end of the vehicle body) is pivoted on the second pivot portion 622 of the first link 62; the second link 63 of the present invention is implemented as a single-piece straight rod body; because the motorcycle 2 is traveling on uneven bad ground, when the rear wheel RW actuates the rear suspension device 6 due to feedback from the bad terrain, the second pivot portion 622 at which the second link 63 and the first link 62 are pivoted will move up and down, and the avoidance recess 612 of the rear swing arm 61 can be used as a movable space for the second pivot portion 622, thereby preventing the second pivot portion 622 from hitting the rear swing arm 61.

[0086] like Figure 2 , 4 As shown in FIGS. 5 and 6, the front end of the rear shock absorber 64 (toward the front end of the vehicle body) is connected to the first connecting portion 352 of the connecting member 351 of the side frame 35 of the frame unit 3, and the rear end of the rear shock absorber 64 (toward the rear end of the vehicle body) is pivoted on the first pivoting portion 621 of the first connecting rod 62; the rear shock absorber 64 is arranged in a slightly horizontal manner to make the rear shock absorber 64 and the rear swing arm 61 arranged in a slightly parallel manner; more specifically, the rear shock absorber 64 is arranged in a slightly parallel manner to the front end 611 of the rear swing arm 61 pivotally connected (the transmission shaft 421) and the center line A of the rear wheel axle 424.

[0087] like Figure 2 , 4, 5, 6, and 7, after the rear suspension device 6 is constructed in the above-mentioned connection mode, when viewed from the side of the vehicle body, the components of the rear suspension device 6 are, from top to bottom in the vertical direction of the vehicle body, the rear shock absorber 64, the first connecting rod 62, the second connecting rod 63, and the rear swing arm 61, that is, the second connecting rod 63 is arranged between the rear swing arm 61 and the rear shock absorber 64; wherein, the rear shock absorber 64 is arranged to be located on the same side of the rear wheel RW as the driving member 422 of the power unit 4. In the present invention, the rear shock absorber 64 and the driving member 422 are both located on the left side of the vehicle body of the rear wheel RW, that is, located The exhaust device D is disposed on the other side of the vehicle body. The present invention arranges the rear shock absorber 64 on the left side of the vehicle body and the exhaust device D on the right side of the vehicle body, so that the weight distribution on both sides of the vehicle body of the motorcycle 2 can be evenly distributed; the rear shock absorber 64 is arranged slightly parallel to the rear swing arm 61 and along the length of the rear swing arm 61 (the front-to-back direction of the vehicle body); the first connecting rod 62 and the second connecting rod 63 are located above the left arm portion 61a of the rear swing arm 61 and above the center line A between the pivot point 611 of the rear swing arm 61 (the transmission shaft 421) and the rear wheel axle 424; when viewed from the side of the vehicle body, the The rear shock absorber 64, the first link 62, the second link 63 and the rear wheel RW overlap; when viewed from above the vehicle body, the rear shock absorber 64, the rear swing arm 61 and the frame unit 3 (the side frame 35) at least partially overlap, so that the side of the storage box T will not be disturbed, thereby increasing the storage space of the storage box T; when viewed from the side of the vehicle body, the central axis B of the front pivot end (the first connecting part 352) of the rear shock absorber 64 along the vertical direction of the vehicle body is adjacent to the central axis C of the front pivot end (the transmission shaft 421) of the rear swing arm 61 along the vertical direction of the vehicle body, and the rear pivot end (the first link 352) of the rear shock absorber 64 The first pivot portion 621) of 62 is adjacent to the center axis B1 of the rear pivot end (the rear wheel axle 424) of the rear swing arm 61 along the center axis C1 of the rear swing arm 61 along the center axis C1 of the rear swing arm 61, so that the rear shock absorber 64 can be arranged along the length of the rear swing arm 61, thereby increasing the buffering stroke of the rear shock absorber 64 to enhance the shock absorbing effect of the rear shock absorber 64; viewed from the side of the vehicle body, the front end of the rear shock absorber 64 overlaps with the storage box T, so that the bottom of the storage box T extends downward to the lower front end of the rear shock absorber 64, and the rear end of the rear shock absorber 64 overlaps with the wheel frame RW1 of the rear wheel RW.

[0088] The effect of the present invention lies in that the motorcycle 2 at least includes a frame unit 3, the frame unit 3 is provided with a power unit 4, and the power unit 4 has a transmission shaft 421 for outputting power; the motorcycle 2 is provided with a rear suspension device 6, the rear suspension device 6 is pivotally provided with a rear wheel shaft 424, the rear wheel shaft 424 is provided with a rear wheel RW, and the transmission shaft 421 drives the rear wheel RW through a driving member 422; the rear suspension device 6 has a rear swing arm 61 pivotally provided on the power unit 4, a first connecting rod 62 pivotally provided on the rear swing arm 61, a second connecting rod 63 pivotally provided between the first connecting rod 62 and the frame unit 3, and a rear shock absorber 64 pivotally provided between the other end of the first connecting rod 62 and the other end of the frame unit 3; the rear The shock absorber 64 and the driving member 422 are located on the same side of the rear wheel RW, and the rear shock absorber 64 is slightly parallel to the rear swing arm 61 and is arranged along the length of the rear swing arm 61; thereby, on the one hand, the space above the rear swing arm 61 can be fully utilized, thereby increasing the storage space of the storage box T, and through the multi-link mechanism composed of the first connecting rod 62, the second connecting rod 63, and the rear shock absorber 64, and the force ratio of the multi-link mechanism is nonlinear, so as to improve the comfort of the motorcycle 2 when driving; on the other hand, by arranging the rear shock absorber 64 slightly parallel to the rear swing arm 61, the buffer stroke of the rear shock absorber 64 can be increased to improve the shock absorption effect of the rear shock absorber 64.

[0089] In summary, the present invention can improve the known shortcomings and achieve the desired purpose through the above-mentioned structure, and has indeed improved the efficacy compared with the existing ones. It is obvious that it has novelty, practicality and creativity.

Claims

1. A motorcycle rear suspension device, characterized in that: The motorcycle at least includes a frame unit, the frame unit is provided with a power unit, and the power unit has a transmission shaft for outputting power; the motorcycle is provided with a rear suspension device, the rear suspension device is pivotally provided with a rear wheel axle, the rear wheel axle is provided with a rear wheel, and the transmission shaft drives the rear wheel through a driving member; the rear suspension device has a rear swing arm pivoted on the power unit, a first connecting rod pivoted on the rear swing arm, a second connecting rod pivoted between the first connecting rod and the frame unit, and a rear shock absorber pivoted between the other end of the first connecting rod and the other end of the frame unit; the rear shock absorber and the driving member are located on the same side of the rear wheel, and the rear shock absorber is slightly parallel to the rear swing arm and is arranged along the length of the rear swing arm.

2. The motorcycle rear suspension device according to claim 1, characterized in that: The rear swing arm has a left arm portion and a right arm portion; the first connecting rod, the second connecting rod and the rear shock absorber are located above the left arm portion of the rear swing arm.

3. The motorcycle rear suspension device according to claim 1, characterized in that: When viewed from the side of the vehicle body, the rear shock absorber, the first connecting rod, the second connecting rod and the rear wheel overlap.

4. The motorcycle rear suspension device according to claim 1, characterized in that: When viewed from above the vehicle body, the rear shock absorber at least partially overlaps with the rear swing arm and the frame unit.

5. The motorcycle rear suspension device according to claim 1, characterized in that: When viewed from the side of the vehicle body, the center axis of the front pivot end of the rear shock absorber along the up-down direction of the vehicle body is adjacent to the center axis of the front pivot end of the rear swing arm along the up-down direction of the vehicle body, and the center axis of the rear pivot end of the rear shock absorber along the up-down direction of the vehicle body is adjacent to the center axis of the rear pivot end of the rear swing arm along the up-down direction of the vehicle body.

6. The motorcycle rear suspension device according to claim 1, characterized in that: The motorcycle is also provided with a storage box; viewed from the side of the vehicle body, the front end of the rear shock absorber overlaps with the storage box, and the rear end of the rear shock absorber overlaps with the wheel frame of the rear wheel.

7. The motorcycle rear suspension device according to claim 1, characterized in that: The rear shock absorber, the first connecting rod and the second connecting rod are located above the line connecting the front end pivot of the rear swing arm and the center of the rear wheel axle; the rear shock absorber is arranged slightly parallel to the center line.

8. The motorcycle rear suspension device according to claim 1, 2, 3 or 7, characterized in that: The first connecting rod is a two-piece rod body.

9. The motorcycle rear suspension device according to claim 1, characterized in that: The motorcycle is also provided with a storage box; the rear shock absorber is located at the side of the storage box, and the bottom of the storage box extends downward to below the front end of the rear shock absorber.

10. The motorcycle rear suspension device according to claim 1 or 2 or 4 or 5 or 7, characterized in that: The rear swing arm comprises a left arm portion and a right arm portion; an avoidance recess is provided above the left arm portion.

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