CN101269687B - Rear wheel suspension for a motorcycle - Google Patents

Rear wheel suspension for a motorcycle Download PDF

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Publication number
CN101269687B
CN101269687B CN2008100811839A CN200810081183A CN101269687B CN 101269687 B CN101269687 B CN 101269687B CN 2008100811839 A CN2008100811839 A CN 2008100811839A CN 200810081183 A CN200810081183 A CN 200810081183A CN 101269687 B CN101269687 B CN 101269687B
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CN
China
Prior art keywords
arm
damper element
upper arm
vehicle body
rear wheel
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Expired - Fee Related
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CN2008100811839A
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Chinese (zh)
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CN101269687A (en
Inventor
五十岚真
高柳真二
高村俊明
津田刚
早川公视
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Publication date
Priority claimed from JP2007074869A external-priority patent/JP2008230479A/en
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of CN101269687A publication Critical patent/CN101269687A/en
Application granted granted Critical
Publication of CN101269687B publication Critical patent/CN101269687B/en
Expired - Fee Related legal-status Critical Current
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Abstract

A rear wheel suspension for a motorcycle can sufficiently ensure the stroke of a rear cushion and can enhance traveling performance of a vehicle by lowering the gravity center of the vehicle. A swing arm includes an upper arm swingably connecting a body frame with the upper portion of a power transmission portion. A lower arm swingably connects the body frame with the lower portion of the power transmission portion. The axial center of the upper end support portion of a rear cushion is swingably supported by the upper arm at a position forward of the axial center of the support portion. The axial center of the lower support portion of the rear cushion can swingably be supported by the lower arm at a position rearward of the axial center of the support portion swingably supporting the lower arm and the body frame with respect to the vehicle.

Description

The rear wheel suspension that is used for motor bike
Technical field
The present invention relates generally to the rear wheel suspension that is used for motor bike, relates more specifically to a kind of like this rear wheel suspension that is used for motor bike, the back damper element that it comprises the swing arm of rotatably supporting trailing wheel and attaches to swing arm.
The present invention also relates generally to the swing arm attachment structure that is used for motor bike, relates more specifically to a kind of attachment structure of swing arm of the parallel rod structure that is used to have a pair of upper arm and underarm.
Background technology
The known following rear wheel suspension that respectively is used for motor bike, that is: the back damper element is laid in the top of car body and extends (for example referring to the flat 1-34830 of Japanese patent gazette) along the fore-and-aft direction of car body; And the back damper element is arranged to extend (for example opening No.2004-352209 referring to the Japanese Patent spy) along the above-below direction of car body.
In the rear wheel suspension of the described motor bike of the flat 1-34830 of above-mentioned Japanese patent gazette, back damper element is along the fore-and-aft direction horizontal arrangement.Therefore, can reduce, and guarantee of the absorption of the stroke of back damper element with the raising impact by back buffer gear occupation space.But, need to make the action direction that impacts from ground-surface link along the fore-and-aft direction level.In addition, because the back damper element is arranged in the place, top of car body, therefore there is the problem that should reduce vehicle's center of gravity.
Open in the rear wheel suspension of the described motor bike of No.2004-352209 above-mentioned Japanese Patent spy, back damper element is arranged vertically with respect to car body.Therefore problem is, and is limited when this is arranged in the stroke of wishing increase back damper element.
Also known such swing arm attachment structure that is used for motor bike, that is: by making the adjustable ring axial motion that is assemblied in pivot shaft adjust overall width direction gap between vehicle body frame and the swing arm, and improve the assembling performance (referring to Japanese Patent No.2564078) of swing arm.
At the described swing arm attachment structure that is used for motor bike of Japanese Patent No.2564078, only support single swing arm swingably, but do not have consideration to have the swing arm attachment structure of the parallel rod structure of two arms at all by vehicle body frame.
For single swing arm, only need to adjust simply the overall width direction gap that limits between vehicle body frame and the single swing arm and get final product.But, for the swing arm of parallel rod structure, need and can adjust two arms in the relative position of overall width direction, adjust the overall width direction gap between vehicle body frame and two arms.Consider the assembling performance of swing arm, expectation can be adjusted described gap from the cross side of car body.
Summary of the invention
Open the relevant problem of No.2004-352209 for solution with flat 1-34830 of Japanese patent gazette and Japanese Patent spy and make the present invention.Therefore, an object of the present invention is to provide a kind of rear wheel suspension that is used for motor bike, it can fully be guaranteed the stroke of back damper element and can improve vehicle by reducing vehicle's center of gravity rideability.
To achieve these goals, according to a first aspect of the invention, a kind of rear wheel suspension that is used for motor bike comprises: the swing arm of being supported swingably by vehicle body frame; The back damper element that is used for the impact of sorption on trailing wheel; And be used for from the power transmission section of power unit to described trailing wheel transmission propulsive effort, described swing arm comprises: upper arm, and this upper arm is pivotably connected the top of described vehicle body frame and described power transmission section; And underarm, this underarm is pivotably connected the bottom of described vehicle body frame and described power transmission section; The axle center of the support portion, upper end of described back damper element is supported on a position swingably by described upper arm, this position is positioned at the place ahead in the axle center of a support portion of supporting described upper arm and described vehicle body frame swingably with respect to vehicle, and the axle center of the support portion, lower end of described back damper element is supported on a position swingably by described underarm, and this position is positioned at the rear in the axle center of a support portion of supporting described underarm and described vehicle body frame swingably with respect to vehicle.
According to a second aspect of the invention, described upper arm is formed with the damper element attachment, is used for supporting swingably the upper end of described back damper element.
According to a third aspect of the invention we, described upper arm comprises left upper arm that is arranged in the car body left side and the right upper arm that is arranged in the car body right side, described underarm comprises lower-left arm that is arranged in the car body left side and the bottom right arm that is arranged in the car body right side, and described back damper element is arranged in the substantial middle position along the overall width direction of described left upper arm, right upper arm and described lower-left arm, bottom right arm.
According to a forth aspect of the invention, described back damper element comprises the dumping force adjusting mechanism, and the front portion in the face of vehicle is arranged in the dumping force adjustment part of this dumping force adjusting mechanism below the damper element of described back.
According to a fifth aspect of the invention, one in described lower-left arm and the described bottom right arm forms and is bent downwardly shape, and another forms the K/UP shape.
According to a first aspect of the invention, described swing arm comprises: upper arm, and this upper arm is pivotably connected the top of described vehicle body frame and described power transmission section; And underarm, this underarm is pivotably connected the bottom of described vehicle body frame and described power transmission section, the axle center of the support portion, upper end of described back damper element is supported on a position swingably by described upper arm, this position is positioned at the place ahead in the axle center of the support portion of supporting described upper arm and described vehicle body frame swingably with respect to vehicle, and the axle center of the support portion, lower end of described back damper element is supported on a position swingably by described underarm, and this position is positioned at the rear in the axle center of the support portion of supporting described underarm and described vehicle body frame swingably with respect to vehicle.Thus, can guarantee the stroke of back damper element fully.In addition, because the back damper element can be arranged in the place, bottom of car body, therefore can reduce vehicle's center of gravity, thereby improve the rideability of vehicle.
According to a second aspect of the invention, described upper arm is formed with the damper element attachment, is used for supporting swingably the upper end of described back damper element.Therefore, back damper element is swung along with the swing of swing arm with the impact of sorption on trailing wheel, thereby improves the rideability of vehicle.
According to a third aspect of the invention we, described upper arm comprises left upper arm that is arranged in the car body left side and the right upper arm that is arranged in the car body right side, described underarm comprises lower-left arm that is arranged in the car body left side and the bottom right arm that is arranged in the car body right side, and described back damper element is arranged in the substantial middle position along the overall width direction of described left upper arm, right upper arm and described lower-left arm, bottom right arm.Thus, back damper element can the impact of balance mode sorption on trailing wheel, thereby improve the rideability of vehicle.
According to a forth aspect of the invention, described back damper element comprises the dumping force adjusting mechanism, and the front portion in the face of vehicle is arranged in the dumping force adjustment part of this dumping force adjusting mechanism below the damper element of described back.Therefore, can under the situation that not influenced by swing arm, adjust the dumping force of back damper element.
According to a fifth aspect of the invention, one in described lower-left arm and the described bottom right arm forms and is bent downwardly shape, and another forms the K/UP shape.Therefore, can prevent from stress concentration to occur, thereby improve the durability of rear wheel suspension at the underarm place.
Make the present invention in order to solve the problem relevant with Japanese Patent No.2564078.Therefore, an object of the present invention is to provide a kind of swing arm attachment structure that is used for motor bike, even swing arm is the parallel rod structure, this swing arm attachment structure also can be adjusted the overall width direction gap between vehicle body frame and the swing arm effectively, and can improve the assembling performance of swing arm.
To achieve these goals, according to a sixth aspect of the invention, a kind of swing arm attachment structure that is used for motor bike comprises: vehicle body frame; The swing arm of supporting swingably by described vehicle body frame; And the power transmission section that is used for transmitting to trailing wheel propulsive effort from power unit; Described swing arm comprises: upper arm, and this upper arm is supported by described vehicle body frame swingably by first pivot shaft, and the top of described vehicle body frame and described power transmission section is pivotably connected; And underarm, this underarm is supported by described vehicle body frame swingably by second pivot shaft, and the bottom of described vehicle body frame and described power transmission section is pivotably connected.Be furnished with adjusting mechanism respectively can adjusting the overall width direction gap between described vehicle body frame and the described upper arm in two axial side of described first pivot shaft, and be furnished with another adjusting mechanism can adjust the overall width direction gap between described vehicle body frame and the underarm in an axial side of described second pivot shaft.
According to a seventh aspect of the invention, each described adjusting mechanism includes: adjustable bolt, this adjustable bolt is formed with on the side face within it and is suitable for receiving described first pivot shaft that is inserted into or the patchhole of described second pivot shaft, is being formed with on its outer peripheral face and the external thread part that is formed on the internal thread part threads engage on the described vehicle body frame; And lock nut, the described external thread part threads engage of this lock nut and described adjustable bolt is to be fixed to described adjustable bolt on the described vehicle body frame.
According to an eighth aspect of the invention, described vehicle body frame comprises: the main frame that supports described power unit; The seat framework, this framework extends back from the substantial middle portion along the car body fore-and-aft direction of described main frame; And body side frame, this body side frame extends to the back upper place from the rearward end of described main frame; And described first pivot shaft is arranged in the delta-shaped region that is limited by described main frame, described seat framework and described body side frame.
According to a sixth aspect of the invention, described swing arm comprises: upper arm, and this upper arm is supported by described vehicle body frame swingably by first pivot shaft, and the top of described vehicle body frame and described power transmission section is pivotably connected; And underarm, this underarm is supported by described vehicle body frame swingably by second pivot shaft, and the bottom of described vehicle body frame and described power transmission section is pivotably connected.Be furnished with adjusting mechanism respectively can adjusting the overall width direction gap between described vehicle body frame and the described upper arm in two axial side of described first pivot shaft, and be furnished with another adjusting mechanism can adjust the overall width direction gap between described vehicle body frame and the underarm in an axial side of described second pivot shaft.By adjust the overall width direction gap between vehicle body frame and the underarm at the adjusting mechanism on the underarm sidepiece.Afterwards, can adjust the overall width direction gap between vehicle body frame and the upper arm by when being positioned at the position alignment that adjusting mechanism on the upper arm sidepiece makes the overall width direction position of upper arm and underarm.Thus,, also can adjust the overall width direction gap between vehicle body frame and the swing arm effectively, thereby improve the assembling performance of swing arm even swing arm has the parallel rod structure.
According to a seventh aspect of the invention, each described adjusting mechanism includes: adjustable bolt, this adjustable bolt is formed with on the side face within it and is suitable for receiving described first pivot shaft that is inserted into or the patchhole of described second pivot shaft, is being formed with on its outer peripheral face and the external thread part that is formed on the internal thread part threads engage on the described vehicle body frame; And lock nut, the described external thread part threads engage of this lock nut and described adjustable bolt is to be fixed to described adjustable bolt on the described vehicle body frame.Thus, can easily adjust the overall width direction position of swing arm and the overall width direction gap between vehicle body frame and the swing arm, thereby improve the assembling performance of swing arm.
According to an eighth aspect of the invention, described vehicle body frame comprises: the main frame that supports described power unit; The seat framework, this framework extends back from the substantial middle portion along the car body fore-and-aft direction of described main frame; And body side frame, this body side frame extends to the back upper place from the rearward end of described main frame.In addition, when the side of described car body was seen, described first pivot shaft was arranged in the delta-shaped region that is limited by described main frame, described seat framework and described body side frame.Thus, can be under the situation of not interfering with framework etc., the attached and adjust the clearance that carries out swing arm easily and effectively.Because first pivot shaft is arranged near the car body central authorities, therefore can reduce the total length of car body, and the weight balancing that improves vehicle is to improve rideability.
Description of drawings
Invention will be more fully understood from the detailed description and the accompanying drawings given below, and these accompanying drawings only provide with way of example, therefore the present invention is not construed as limiting, in the accompanying drawings:
Fig. 1 is the lateral plan that adopts according to the main portion of the motor bike of the rear wheel suspension that is used for motor bike of the present invention;
Fig. 2 is the block diagram of rear wheel suspension shown in Figure 1;
Fig. 3 comprises the view that is used for the aid illustration upper arm, and Fig. 3 (a) is the planar view of upper arm, and Fig. 3 (b) is the lateral plan of upper arm, and Fig. 3 (c) is that the line A-A along Fig. 3 (a) cuts open the amplification view of getting;
Fig. 4 comprises the view that is used for the aid illustration underarm, and Fig. 4 (a) is the planar view of underarm, and Fig. 4 (b) is the lateral plan of underarm, and Fig. 4 (c) is that the line B-B along Fig. 4 (a) cuts open the amplification view of getting;
Fig. 5 is used for the enlarged side view of main portion that aid illustration is in the rear wheel suspension of normal condition;
Fig. 6 is used for the enlarged side view of main portion that aid illustration is in the rear wheel suspension of damping state;
Fig. 7 is the lateral plan that adopts according to the main portion of the motor bike of the swing arm attachment structure that is used for motor bike of the present invention;
Fig. 8 is the block diagram of rear wheel suspension shown in Figure 6;
Fig. 9 is that the line C-C along Fig. 7 cuts open the cutaway view of getting;
Figure 10 is the cutaway view of the main portion of amplifying, be used between aid illustration upper arm and each drive gear casing and the trailing wheel stay bearing plate and underarm and each drive gear casing and trailing wheel stay bearing plate between connecting bridge.
The specific embodiment
Describe the embodiment that is used for the rear wheel suspension of motor bike according to of the present invention below with reference to accompanying drawings in detail.It should be noted, should watch accompanying drawing based on the direction of reference symbol.
Fig. 1 is the lateral plan that adopts according to the main portion of the motor bike of the rear wheel suspension that is used for motor bike of the present invention.Fig. 2 is the block diagram of rear wheel suspension shown in Figure 1.Fig. 3 comprises the view that is used for the aid illustration upper arm.Fig. 3 (a) is the planar view of upper arm, and Fig. 3 (b) is the lateral plan of upper arm, and Fig. 3 (c) is that the line A-A along Fig. 3 (a) cuts open the amplification view of getting.Fig. 4 comprises the view that is used for the aid illustration underarm.Fig. 4 (a) is the planar view of underarm, and Fig. 4 (b) is the lateral plan of underarm, and Fig. 4 (c) is that the line B-B along Fig. 4 (a) cuts open the amplification view of getting.Fig. 5 is used for the enlarged side view that aid illustration is in main portion rear wheel suspension, vehicle of normal condition.Fig. 6 is used for the enlarged side view that aid illustration is in main portion rear wheel suspension, vehicle of damping state.Fig. 7 is the lateral plan that adopts according to the main portion of the motor bike of the swing arm attachment structure that is used for motor bike of the present invention.Fig. 8 is the block diagram of rear wheel suspension shown in Figure 7.Fig. 9 is that the line C-C along Fig. 7 cuts open the cutaway view of getting.Figure 10 is the cutaway view of the main portion of amplifying, be used between aid illustration upper arm and each drive gear casing and the trailing wheel stay bearing plate and underarm and each drive gear casing and trailing wheel stay bearing plate between connecting bridge.
In the following description, all around and upside and downside are based on the direction that the driver faces.In addition, use " Fr ", " Rr ", " L ", " R ", " U " and " D " to represent the front, back, left, right, up, down respectively.
First embodiment
With reference to Fig. 1 motor bike 10 according to first embodiment of the invention is described.Motor bike 10 comprises vehicle body frame 20.Power unit 11 is from attached underneath in vehicle body frame 20, and comprises combustion engine and change speed gear box.Rear wheel suspension 30 is supported swingably by the bottom of vehicle body frame 20.Trailing wheel 12 is rotatably supported by the rear end of rear wheel suspension 30.
Vehicle body frame 20 comprises a pair of main frame 21, cross member 22, subframe 23, seat framework 24 and body side frame 25.Main frame 21 extends downwards backward from unshowned head pipe.Cross member 22 connects the pars intermedia along the overall width direction of main frame 21.Subframe 23 joins the top of main frame 21 to and joins the upper surface of cross member 22 to.Seat framework 24 joins subframe 23 in its front end and extends back.Body side frame 25 comprises the leading section that links to each other with the curve of main frame 21, and the rearward end that engages with the rearward end of seat framework 24.
With reference to Fig. 2, rear wheel suspension 30 comprises the swing arm of being supported swingably by main frame 21 40.The impact of back damper element 50 sorptions on trailing wheel 12.Power transmission section 31 transmits propulsive effort from power unit 11 to trailing wheel 12.
Power transmission section 31 links to each other with the output shaft 11a that is arranged on power unit 11 rear end by axle drive shaft 13.In addition, power transmission section 31 comprises drive gear casing 32 and the trailing wheel stay bearing plate 33 that all links to each other with swing arm 40.Input shaft 34 is driven gear case 32 and rotatably supports and be connected to axle drive shaft 13.Rear axle 35 is driven gear case 32 and trailing wheel stay bearing plate 33 rotatably supports, and is attached with trailing wheel 12.Finishing bevel gear cuter mechanism (not shown) is combined in the drive gear casing 32, sending rear axle 35 to the propulsive effort of input shaft 34 inputs from axle drive shaft 13.By this structure, the propulsive effort of power unit 11 sends rear axle 35 to by output shaft 11a, axle drive shaft 13, input shaft 34 and finishing bevel gear cuter mechanism, to drive trailing wheel 12 rotations.
Swing arm 40 comprises upper arm 41 and underarm 42.Upper arm 41 is pivotably connected the main frame 21 and the top of power transmission section 31.Underarm 42 is pivotably connected the main frame 21 and the bottom of power transmission section 31.
As shown in figures 1 and 3, upper arm 41 comprises tubular pivot pipe 60, left upper arm 61, right upper arm 62, bifurcated connecting panel 63, cross member 64 and damper element attachment 65,65.Pivot pipe 60 is by first pivot shaft 43 main frame 21 that is pivotably connected.The left side that left upper arm 61 is arranged in car body extends back with the left part from pivot pipe 60.The right side that right upper arm 62 is arranged in car body extends back with the right part from pivot pipe 60.Connecting panel 63 is formed on the rearward end place of left upper arm 61 and right upper arm 62, thereby by using tie bolt 44 that drive gear casing 32 and trailing wheel stay bearing plate 33 are pivotably connected.Cross member 64 links to each other the pars intermedia on the overall width direction of left upper arm 61 and right upper arm 62. Damper element attachment 65,65 is integrally formed as from the central portion of pivot pipe 60 extends downwards, and supports the upper end of back damper element 50 swingably.Pivot pipe 60 is provided with needle roller bearing 60a, ball-bearing casing 60b, 60b, collar parts 60c, 60d, 60e and is plugged in sealing element 60f, 60f between first pivot shaft 43 and the pivot pipe 60 in inside.The internal thread part 63b that connecting panel 63 all is formed with the patchhole 63a that is suitable for receiving the tie bolt 44 that is inserted into and is suitable for being fastenedly connected bolt 44.Damper element attachment 65 all is formed with the patchhole 65a that is suitable for receiving the attached bolt 56 that is inserted into that will describe after a while.
At the front end of upper arm 41, pivot pipe 60 is supported by the pars intermedia of main frame 21 swingably by first pivot shaft 43.The last connecting arm 32a that is formed on drive gear casing 32 tops places is by the be pivotably connected connecting panel 63 of left upper arm 61 of tie bolt 44.The last connecting arm 33a that is formed on trailing wheel stay bearing plate 33 tops places is by the be pivotably connected connecting panel 63 of right upper arm 62 of tie bolt 44.Collar parts and sleeve member (not shown) are plugged in tie bolt 44 and on each between connecting arm 32a, the 33a.
As shown in Figure 1 and Figure 4, underarm 42 comprises tubular pivot pipe 70, lower-left arm 71, bottom right arm 72, bifurcated connecting panel 73, cross member 74 and damper element support 75,75.Pivot pipe 70 is by second pivot shaft 45 main frame 21 that is pivotably connected.The left side that lower-left arm 71 is arranged in car body extends back with the left part from pivot pipe 70.The right side that bottom right arm 72 is arranged in car body extends back with the right part from pivot pipe 70.Connecting panel 73 is formed on the rearward end place of lower-left arm 71 and bottom right arm 72, thereby by using tie bolt 46 that drive gear casing 32 and trailing wheel stay bearing plate 33 are pivotably connected.Cross member 74 links to each other the pars intermedia on the overall width direction of lower-left arm 71 and bottom right arm 72. Damper element support 75,75 is integrally formed on the upper surface of substantial middle portion of cross member 74, to support the bottom of back damper element 50 swingably.Pivot pipe 70 is provided with needle roller bearing 70a, ball-bearing casing 70b, 70b, collar parts 70c, 70d, 70e and is plugged in sealing element 70f, 70f between second pivot shaft 45 and the pivot pipe 70 in inside.The internal thread part 73b that connecting panel 73 all is formed with the patchhole 73a that is suitable for receiving the tie bolt 46 that is inserted into and is suitable for being fastenedly connected bolt 46.Damper element support 75 all is formed with the patchhole 75a that is suitable for receiving the attached bolt 57 that is inserted into that will describe after a while.
As shown in Figure 4, in current embodiment, lower-left arm 71 forms the K/UP shape, and bottom right arm 72 forms and is bent downwardly shape.
At the front end of underarm 42, pivot pipe 70 is supported by the bottom of main frame 21 swingably by second pivot shaft 45.The following connecting arm 32b that is formed on place, drive gear casing 32 bottoms is supported by the connecting panel 73 of lower-left arm 71 swingably by tie bolt 46.The following connecting arm 33b that is formed on trailing wheel stay bearing plate 33 bottoms places is by the be pivotably connected connecting panel 73 of bottom right arm 72 of tie bolt 46.Mention that at will collar parts and sleeve member (not shown) are plugged between tie bolt 46 and each time connecting arm 32b, the 33b.
As shown in Figure 5 and Figure 6, back damper element 50 comprises damper cylinder 51.Piston rod 52 inserts in the damper cylinder 51.Suspension spring 53 is plugged between damper cylinder 51 and the piston rod 52.Be arranged on the upper end of damper cylinder 51 as the last connecting portion 54 of upper end of back damper element 50.Be arranged on the lower end of piston rod 52 as the following connecting portion 55 of bottom of back damper element 50.
The last connecting portion 54 of back damper element 50 is by the be pivotably connected damper element attachment 65 of upper arm 41 of attached bolt 56.As shown in Figure 5, when seeing from the side, the axle center P1 of pivot pipe 60 is arranged in the axle center P2 top of the patchhole 63a of connecting panel 63.The pivot axle center P3 of damper element attachment 65 is arranged in P1 the place ahead, axle center of pivot pipe 60 with respect to vehicle.The attached bolt 56 of the last connecting portion 54 of damper element 50 is supported on such position swingably by the damper element attachment 65 of upper arm 41 after connecting, and this position is positioned at upper arm 41 and preset distance Z place, main frame 21 bonded assembly first pivot shaft, 43 the place ahead with respect to vehicle.
The following connecting portion 55 of back damper element 50 is by the be pivotably connected damper element support 75 of underarm 42 of attached bolt 57.As shown in Figure 5, the axle center P4 of pivot pipe 70 is arranged in the axle center P5 top of the patchhole 73a of connecting panel 73.The pivot axle center P6 of damper element support 75 is arranged in the P4 rear, axle center of pivot pipe 70 with respect to vehicle.
The be pivotably connected damper element support 75 of underarm 42 of the be pivotably connected damper element attachment 65 of upper arm 41 of last connecting portion 54, following connecting portion 55; Therefore, back damper element 50 is arranged in left upper arm 61, right upper arm 62 and lower-left arm 71, the bottom right arm 72 substantial middle position along the overall width direction.
With reference to Fig. 2 and Fig. 5, back damper element 50 comprises dumping force adjusting mechanism 80.The front portion in the face of vehicle is arranged in the dumping force adjustment part 81 of dumping force adjusting mechanism 80 at following connecting portion 55 places of back damper element 50.Therefore, owing to can under the situation that not influenced by underarm 42, adjust dumping force adjusting mechanism 80, therefore can under the situation that does not remove back damper element 50, adjust the dumping force of back damper element 50 from swing arm 40.
With reference to Fig. 5 and Fig. 6 operation according to the rear wheel suspension 30 of current embodiment is described below.At will mention, from Fig. 5 and Fig. 6, omitted a part, power unit, axle drive shaft and the trailing wheel of vehicle body frame.
With reference to Fig. 5 and Fig. 6, when in the rear wheel suspension 30 at current embodiment because when making power transmission section 31 with the trailing wheel upward movement from ground-surface impact etc., upper arm 41 and underarm 42 are respectively around first pivot shaft 43 and 45 swings of second pivot shaft.At this moment, along with the swing of upper arm 41, damper element attachment 65 is moved along circular arc backward around first pivot shaft 43.In addition, along with the swing of underarm 42, damper element support 75 moves to the upper right side along circular arc around second pivot shaft 45.Thus, back damper element 50 expands along axially being extruded of piston rod 52 and shrinks, thereby by 50 decay and the impacts of sorption on trailing wheel 12 of back damper element.
As mentioned above, according to the rear wheel suspension 30 of the motor bike 10 of current embodiment, swing arm 40 comprises upper arm 41, and this upper arm is pivotably connected the top of vehicle body frame 20 with power transmission section 31.Underarm 42 is pivotably connected the bottom of vehicle body frame 20 with power transmission section 31.The axle center of the support portion, upper end of back damper element 50 is supported on a position swingably by upper arm 41, and this position is positioned at the place ahead in the axle center of the support portion of supporting upper arm 41 and vehicle body frame 20 swingably with respect to vehicle.In addition, the axle center of the lower support portion of back damper element 50 is supported on a position swingably by underarm 42, and this position is positioned at the rear in the axle center of the support portion of supporting underarm 42 and vehicle body frame 20 swingably with respect to vehicle.Thus, can guarantee the stroke of back damper element 50 fully.Because back damper element 50 can be arranged in the bottom place of car body, so the center of gravity of vehicle 10 can reduce, thereby improves the rideability of vehicle 10.
According to the rear wheel suspension 30 of the motor bike 10 of current embodiment, upper arm 41 is integrally formed with the damper element attachment 65 that supports damper element 50 upper ends, back swingably.Thus, back damper element 50 is swung with the impact of sorption on trailing wheel 12 reposefully with the swing of swing arm 40, thereby improves the rideability of vehicle 10.
According to the rear wheel suspension 30 of the motor bike 10 of current embodiment, upper arm 41 comprises left upper arm 61 that is arranged in the car body left side and the right upper arm 62 that is arranged in the car body right side.Underarm 42 comprises lower-left arm 71 that is arranged in the car body left side and the bottom right arm 72 that is arranged in the car body right side.Back damper element 50 is arranged in left upper arm 61, right upper arm 62 and lower-left arm 71, the bottom right arm 72 substantial middle position along the overall width direction.Thus, the impact of sorption on trailing wheel 12 reposefully of back damper element 50, thus can improve the rideability of vehicle 10.
According to the rear wheel suspension 30 of the motor bike 10 of current embodiment, back damper element 50 comprises dumping force adjusting mechanism 80, and the front portion in the face of vehicle is arranged in the dumping force adjustment part 81 of dumping force adjusting mechanism 80 below the damper element 50 of back.Thus, can under the situation that the underarm 42 that is not subjected to swing arm 40 influences, adjust the dumping force of back damper element 50.
According to the rear wheel suspension 30 of the motor bike 10 of current embodiment, lower-left arm 71 forms and is bent downwardly shape, and bottom right arm 72 forms the K/UP shape.Therefore, can prevent from stress concentration to occur at underarm 42 places, thus the durability of raising rear wheel suspension 30.
The present invention is not limited to above-mentioned illustrative embodiments, can suitably revise in every way under the situation that does not break away from spirit of the present invention.
For example, above-mentioned embodiment illustration apply the present invention to have the situation of the motor bike of drive shaft.But the present invention is not limited to this situation, can be applied to have the motor bike that chain drives.
Second embodiment
With reference to Fig. 7 motor bike 10 according to second embodiment of the invention will be described.Motor bike 10 comprises vehicle body frame 20.Power unit 11 is from attached underneath in vehicle body frame 20, and comprises combustion engine and change speed gear box.Rear wheel suspension 30 is supported swingably by the bottom of vehicle body frame 20.Trailing wheel 12 is rotatably supported by the rear end of rear wheel suspension 30.
Vehicle body frame 20 comprises a pair of main frame 21, cross member 22, subframe 23, seat framework 24 and body side frame 25.Main frame 21 extends downwards backward from unshowned head pipe.Cross member 22 connects the pars intermedia of main frame 21 along the overall width direction.Subframe 23 joins the top of main frame 21 to and joins the upper surface of cross member 22 to.Seat framework 24 joins subframe 23 in its front end and extends back.Body side frame 25 comprises the leading section that links to each other with the curve of main frame 21, and the rearward end that engages with the rearward end of seat framework 24.
With reference to Fig. 8, rear wheel suspension 30 comprises the swing arm of being supported swingably by main frame 21 40.The impact of back damper element 50 sorptions on trailing wheel 12.Power transmission section 31 transmits propulsive effort from power unit 11 to trailing wheel 12.
Power transmission section 31 links to each other with the output shaft 11a that is arranged on power unit 11 rear end by axle drive shaft 13.In addition, power transmission section 31 comprises drive gear casing 32 and the trailing wheel stay bearing plate 33 that all links to each other with swing arm 40.Input shaft 34 is driven gear case 32 and rotatably supports and be connected to axle drive shaft 13.Rear axle 35 is driven gear case 32 and trailing wheel stay bearing plate 33 rotatably supports, and is attached with trailing wheel 12.Finishing bevel gear cuter mechanism (not shown) is combined in the drive gear casing 32, sending rear axle 35 to the propulsive effort of input shaft 34 inputs from axle drive shaft 13.By this structure, the propulsive effort of power unit 11 sends rear axle 35 to by output shaft 11a, axle drive shaft 13, input shaft 34 and finishing bevel gear cuter mechanism, to drive trailing wheel 12 rotations.
Swing arm 40 comprises upper arm 41 and underarm 42.Upper arm 41 is supported by main frame 21 swingably by first pivot shaft 43, and the top of main frame 21 with power transmission section 31 is pivotably connected.Underarm 42 is supported by main frame 21 swingably by second pivot shaft 45, and the bottom of main frame 21 with power transmission section 31 is pivotably connected.
As Fig. 7 and shown in Figure 3, upper arm 41 comprises tubular pivot pipe 60, left upper arm 61, right upper arm 62, bifurcated connecting panel 63, cross member 64 and damper element attachment 65,65.Pivot pipe 60 is by first pivot shaft 43 main frame 21 that is pivotably connected.Left upper arm 61 is arranged in the left side of car body and extends back from the left part of pivot pipe 60.Right upper arm 62 is arranged in the right side of car body and extends back from the right part of pivot pipe 60.Connecting panel 63 is formed on the rearward end place of left upper arm 61 and right upper arm 62, thereby by using tie bolt 44 that drive gear casing 32 and trailing wheel stay bearing plate 33 are pivotably connected.Cross member 64 links to each other the pars intermedia on the overall width direction of left upper arm 61 and right upper arm 62.Damper element attachment 65,65 is integrally formed as from the central portion of pivot pipe 60 extends downwards, and supports the upper end of back damper element 50 swingably.Pivot pipe 60 is provided with needle roller bearing 60a, ball-bearing casing 60b, 60b, collar parts 60c, 60d, 60e and is plugged in sealing element 60f, 60f between first pivot shaft 43 and the pivot pipe 60 in inside.The internal thread part 63b that connecting panel 63 all is formed with the patchhole 63a that is suitable for receiving the tie bolt 44 that is inserted into and is suitable for being fastenedly connected bolt 44.Damper element attachment 65 all is formed with the patchhole 65a that is suitable for receiving the attached bolt 56 that is inserted into that will describe after a while.
In upper arm 41, pivot pipe 60 is supported by the pars intermedia of main frame 21 swingably by first pivot shaft 43.The last connecting arm 32a that is formed on drive gear casing 32 tops places is by the be pivotably connected connecting panel 63 of left upper arm 61 of tie bolt 44.The last connecting arm 33a that is formed on trailing wheel stay bearing plate 33 tops places is by the be pivotably connected connecting panel 63 of right upper arm 62 of tie bolt 44.With reference to Figure 10, last connecting arm 32a (33a) in its cylindrical part, be provided with collar parts 90,90, ball-bearing casing 91,91 and be plugged in tie bolt 44 and last connecting arm 32a (33a) between sealing element 92,92.
As Fig. 7 and shown in Figure 4, underarm 42 comprises tubular pivot pipe 70, lower-left arm 71, bottom right arm 72, bifurcated connecting panel 73, cross member 74 and damper element support 75,75.Pivot pipe 70 is by second pivot shaft 45 main frame 21 that is pivotably connected.Lower-left arm 71 is arranged in the left side of car body and extends back from the left part of pivot pipe 70.Bottom right arm 72 is arranged in the right side of car body and extends back from the right part of pivot pipe 70.Connecting panel 73 is formed on the rearward end place of lower-left arm 71 and bottom right arm 72, thereby by using tie bolt 46 that drive gear casing 32 and trailing wheel stay bearing plate 33 are pivotably connected.Cross member 74 links to each other the pars intermedia on the overall width direction of lower-left arm 71 and bottom right arm 72.Damper element support 75,75 is integrally formed on the upper surface of substantial middle portion of cross member 74, to support the bottom of back damper element 50 swingably.Pivot pipe 70 is provided with needle roller bearing 70a, ball-bearing casing 70b, 70b, collar parts 70c, 70d, 70e and is plugged in sealing element 70f, 70f between second pivot shaft 45 and the pivot pipe 70 in inside.The internal thread part 73b that connecting panel 73 all is formed with the patchhole 73a that is suitable for receiving the tie bolt 46 that is inserted into and is suitable for being fastenedly connected bolt 46.Damper element support 75 all is formed with the patchhole 75a that is suitable for receiving the attached bolt 57 that is inserted into that will describe after a while.
At the front end of underarm 42, pivot pipe 70 is supported by the bottom of main frame 21 swingably by second pivot shaft 45.The following connecting arm 32b that is formed on place, drive gear casing 32 bottoms is supported by the connecting panel 73 of lower-left arm 71 swingably by tie bolt 46.The following connecting arm 33b that is formed on trailing wheel stay bearing plate 33 bottoms places is by the be pivotably connected connecting panel 73 of bottom right arm 72 of tie bolt 46.With reference to Figure 10, following connecting arm 32b (33b) in its cylindrical part, be provided with collar parts 90,90, ball-bearing casing 91,91 and be plugged in tie bolt 44 and following connecting arm 32b (33b) between sealing element 92,92.
As shown in Figure 7, back damper element 50 comprises damper cylinder 51.Piston rod 52 inserts in the damper cylinder 51.Suspension spring 53 is plugged between damper cylinder 51 and the piston rod 52.Last connecting portion 54 is arranged on the upper end of damper cylinder 51, to link to each other with the damper element attachment 65 of upper arm 41.Following connecting portion 55 is arranged on the lower end of piston rod 52, to link to each other with the damper element support 75 of underarm 42.Be pivotably connected and will descend the connecting portion 55 and the damper element support 75 of underarm 42 to be pivotably connected by the damper element attachment 65 that will go up connecting portion 54 and upper arm 41 via attached bolt 56, back damper element 50 is assembled in the swing arm 40 swingably via attached bolt 57.
With reference to Fig. 9, in current embodiment, be furnished with an adjusting mechanism 80 between each of two axial ends of the pivot pipe 60 in being contained in upper arm 41 (two axial ends of first pivot shaft 43) and the main frame 21.Between the right part (axial side of second pivot shaft 45) of the pivot pipe 70 of underarm 42 and main frame 21, be furnished with another adjusting mechanism 80.Above-mentioned adjusting mechanism 80 has identical structure.Can adjust the overall width direction gap between main frame 21, upper arm 41 and the underarm 42.When vehicle body side was seen, first pivot shaft 43 was arranged in the delta-shaped region S that is limited by main frame 21, seat framework 24 and body side frame 25.
Adjusting mechanism 80 comprises adjustable bolt 81 and lock nut 82.Adjustable bolt 81 is cylindrical parts, and be formed with on the side face within it and be suitable for receiving each first pivot shaft 43 that is inserted into and the patchhole 83 of second pivot shaft 45, be formed with on its outer peripheral face and the external thread part 84 that is formed on the internal thread part 21a threads engage on the main frame 21.By making the internal thread part 21a threads engage of external thread part 84 and main frame 21, and adjustable bolt 81 is assembled on the main frame 21.Adjustable bolt 81 self rotates and can move vertically.Lock nut 82 and external thread part 84 threads engage are to be fixed to adjustable bolt 81 on the main frame 21 at selectable location.
Below with reference to the attach procedure of Fig. 9 description according to the swing arm attachment structure of the motor bike of present embodiment.
At first, make the downside internal thread part 21a threads engage of external thread part 84 with the right side main frame 21 of adjustable bolt 81.Then, the pivot pipe 70 of underarm 42 is arranged between the described a pair of main frame 21, second pivot shaft 45 is inserted the patchhole 83 of adjustable bolt 81 from the right side of car body, and order is inserted collar parts 70c, ball-bearing casing 70b, 70b, collar parts 70d, collar parts 70e in the pivot pipe 70, the pivot hole 21b on the left of insertion is formed on then in the main frame 21.Make the left part threads engage of the nut 85 and second pivot shaft 45.
Rotate adjustable bolt 81, make end face push card coil component 70c, ball-bearing casing 70b, 70b, collar parts 70d and the collar parts 70e of adjustable bolt 81, thereby underarm 42 is moved to make collar parts 70e and left side main frame 21 position contacting with at overall width direction location underarm 42, and adjust the overall width direction gap between in underarm 42 and the described a pair of body frame 21 each.Afterwards, adjustable bolt 81 is fastened to right side main frame 21, and the left part of second pivot shaft 45 is fastened to left side main frame 21 by nut 85 by lock nut 82.
Make each threads engage among the upside internal thread part 21a of adjustable bolt 81 and described a pair of main frame 21 then.Then, the pivot pipe 60 of upper arm 41 is arranged between the described a pair of main frame 21, first pivot shaft 43 is inserted the patchhole 83 of adjustable bolt 81 from the right side of car body, order is inserted collar parts 60c, ball-bearing casing 60b, 60b, collar parts 60d, the collar parts 60e in the pivot pipe 60, then the left side main frame 21 of patchhole 83 threads engage of insertion and adjustable bolt 81.The left part threads engage of the nut 85 and first pivot shaft 43.
Rotating two is left and right sides adjustable bolt 81,81, makes end face push card coil component 60c, ball-bearing casing 60b, 60b, collar parts 60d and the collar parts 60e of adjustable bolt 81,81.By this way, make the overall width direction position of upper arm 41 and the position alignment of underarm 42, thereby can not cause on the overall width direction, offset occurring between upper arm 41 and the underarm 42.In addition, adjust overall width direction gap between each and the upper arm 41 in the described a pair of main frame 21.Afterwards, respectively adjustable bolt 81,81 is fastened on the described a pair of main frame 21, and the left part of first pivot shaft 43 is fastened to left side main frame 21 by nut 85 by lock nut 82,82.
As mentioned above, according to the swing arm attachment structure that is used for motor bike based on present embodiment, swing arm 40 comprises upper arm 41, and this upper arm is supported by vehicle body frame 20 swingably by first pivot shaft 43, and the top of vehicle body frame 20 with power transmission section 31 is pivotably connected.Underarm 42 is supported by vehicle body frame 20 swingably by second pivot shaft 45, and the bottom of vehicle body frame 20 with power transmission section 31 is pivotably connected.Thereby being arranged in two axial ends of first pivot shaft 43, adjusting mechanism 80 can adjust overall width direction gap between vehicle body frame 20 and the upper arm 41.In addition, thus adjusting mechanism 80 is arranged in a described axial side of second pivot shaft 45 can adjust overall width direction gap between vehicle body frame 20 and the underarm 42.By adjust the overall width direction gap between vehicle body frame 20 and the underarm 42 at the adjusting mechanism on the underarm 42 80.Afterwards, can adjust the gap of the overall width direction between vehicle body frame 20 and the upper arm 41 by when being positioned at the position alignment that adjusting mechanism 80,80 on upper arm 41 sidepieces makes the overall width direction position of upper arm 41 and underarm 42.Thus,, also can adjust the overall width direction gap between vehicle body frame 20 and the swing arm 40 effectively, thereby improve the assembling performance of swing arm 40 even swing arm 40 has the parallel rod structure.
According to the swing arm attachment structure that is used for motor bike based on present embodiment, adjusting mechanism 80 comprises adjustable bolt 81, this adjustable bolt is formed with on the side face within it and is suitable for receiving first pivot shaft 43 that is inserted into or the patchhole 83 of second pivot shaft 45, is being formed with on its outer peripheral face and the external thread part 84 that is formed on the internal thread part 21a threads engage on the vehicle body frame 20.Lock nut 82 and the internal thread part 21a threads engage that is formed on the vehicle body frame 20 are to be fixed on adjustable bolt 81 on the vehicle body frame 20.Thus, can easily adjust the overall width direction position of swing arm 40 and the overall width direction gap between vehicle body frame 20 and the swing arm 40, thereby improve the assembling performance of swing arm 40.
According to the swing arm attachment structure that is used for motor bike based on current embodiment, vehicle body frame 20 comprises: the main frame 21 of supporting motive force unit 11; The seat framework 24 that extends back from the substantial middle portion along the car body fore-and-aft direction of main frame 21.Body side frame 25 extends to the back upper place from the rearward end of main frame 21.In addition, when vehicle body side was seen, first pivot shaft 43 was arranged in the delta-shaped region S that is limited by main frame 21, seat framework 24 and body side frame 25.Thus, can be under the situation of not interfering with framework etc., the attached and adjust the clearance that carries out swing arm 40 easily and effectively.Because first pivot shaft 43 is arranged near the car body central authorities, therefore can reduce the total length of car body, and the weight balancing that improves vehicle is to improve rideability.
The present invention is not limited to above-mentioned illustrative embodiments, can suitably revise in every way under the situation that does not break away from spirit of the present invention.
For example, in current embodiment, the adjusting mechanism 80 that is arranged on the axial side of second pivot shaft 45 is arranged on the right part of second pivot shaft 45.But the present invention is not limited to this.Adjusting mechanism 80 can be arranged on the left part of second pivot shaft 45.
Described the present invention like this, be apparent that and change the present invention according to multiple mode.These changes should not be considered as breaking away from the spirit and scope of the present invention, and all these conspicuous for those skilled in the art modifications all ought to comprise within the scope of the appended claims.
The cross reference of related application
This non-provisional application requires in the patent application No.2007-074868 of submission on March 22nd, 2007 and the preceence of 2007-074869.Above-mentioned each application is whole incorporated herein by reference.

Claims (12)

1. rear wheel suspension that is used for motor bike, this rear wheel suspension comprises:
The swing arm of supporting swingably by vehicle body frame;
The back damper element that is used for the impact of sorption on trailing wheel; And
Be used for from the power transmission section of power unit to described trailing wheel transmission propulsive effort,
Wherein, described swing arm comprises:
Upper arm, this upper arm is pivotably connected the top of described vehicle body frame and described power transmission section;
Underarm, this underarm is pivotably connected the bottom of described vehicle body frame and described power transmission section; Described upper arm comprises left upper arm that is arranged in the car body left side and the right upper arm that is arranged in the car body right side, described underarm comprises lower-left arm that is arranged in the car body left side and the bottom right arm that is arranged in the car body right side, and described back damper element is arranged in the substantial middle position along the overall width direction of described left upper arm, right upper arm and described lower-left arm, bottom right arm, and
Cross member, this cross member links to each other the pars intermedia on the overall width direction of described lower-left arm and described bottom right arm;
The axle center of the support portion, upper end of described back damper element is supported on a position swingably by described upper arm, this position is positioned at the place ahead in axle center that described vehicle body frame with respect to vehicle supports a support portion of described upper arm swingably, and the axle center of the support portion, lower end of described back damper element is supported on a position swingably by described underarm, and this position is positioned at the rear in axle center that described vehicle body frame with respect to vehicle supports a support portion of described underarm swingably;
And, be supported on swingably on the damper element support (75) of described underarm (42) in the below of described underarm (42) as the following connecting portion (55) of the bottom of damper element (50) after described.
2. the rear wheel suspension that is used for motor bike according to claim 1, wherein said upper arm is formed with the damper element attachment, is used for supporting swingably the upper end of described back damper element.
3. the rear wheel suspension that is used for motor bike according to claim 1, wherein said back damper element comprises the dumping force adjusting mechanism, the front portion in the face of vehicle is arranged in the dumping force adjustment part of this dumping force adjusting mechanism below the damper element of described back.
4. the rear wheel suspension that is used for motor bike according to claim 2, wherein said back damper element comprises the dumping force adjusting mechanism, the front portion in the face of vehicle is arranged in the dumping force adjustment part of this dumping force adjusting mechanism below the damper element of described back.
5. the rear wheel suspension that is used for motor bike according to claim 1, one in wherein said lower-left arm and the described bottom right arm forms and is bent downwardly shape, and another forms the K/UP shape.
6. the rear wheel suspension that is used for motor bike according to claim 2, one in wherein said lower-left arm and the described bottom right arm forms and is bent downwardly shape, and another forms the K/UP shape.
7. the rear wheel suspension that is used for motor bike according to claim 3, one in wherein said lower-left arm and the described bottom right arm forms and is bent downwardly shape, and another forms the K/UP shape.
8. the rear wheel suspension that is used for motor bike according to claim 4, one in wherein said lower-left arm and the described bottom right arm forms and is bent downwardly shape, and another forms the K/UP shape.
9. the rear wheel suspension that is used for motor bike according to claim 1, wherein said upper arm is supported by described vehicle body frame swingably by first pivot shaft, and described underarm is supported by described vehicle body frame swingably by second pivot shaft, and,
Be furnished with adjusting mechanism respectively can adjusting the overall width direction gap between described vehicle body frame and the described upper arm in two axial side of described first pivot shaft, and be furnished with another adjusting mechanism can adjust the overall width direction gap between described vehicle body frame and the underarm in an axial side of described second pivot shaft.
10. the rear wheel suspension that is used for motor bike according to claim 9, wherein each described adjusting mechanism includes:
Adjustable bolt, this adjustable bolt is formed with on the side face within it and is suitable for receiving described first pivot shaft that is inserted into or the patchhole of described second pivot shaft, is being formed with on its outer peripheral face and the external thread part that is formed on the internal thread part threads engage on the described vehicle body frame; And
Lock nut, the described external thread part threads engage of this lock nut and described adjustable bolt is to be fixed to described adjustable bolt on the described vehicle body frame.
11. the rear wheel suspension that is used for motor bike according to claim 9, described vehicle body frame comprises:
Support the main frame of described power unit;
The seat framework, this framework extends back from the substantial middle portion along the car body fore-and-aft direction of described main frame; And
Body side frame, this body side frame extends to the back upper place from the rearward end of described main frame,
Wherein, when the side of described car body was seen, described first pivot shaft was arranged in the delta-shaped region that is limited by described main frame, described seat framework and described body side frame.
12. the rear wheel suspension that is used for motor bike according to claim 10, described vehicle body frame comprises:
Support the main frame of described power unit;
The seat framework, this framework extends back from the substantial middle portion along the car body fore-and-aft direction of described main frame; And
Body side frame, this body side frame extends to the back upper place from the rearward end of described main frame,
Wherein, when the side of described car body was seen, described first pivot shaft was arranged in the delta-shaped region that is limited by described main frame, described seat framework and described body side frame.
CN2008100811839A 2007-03-22 2008-03-18 Rear wheel suspension for a motorcycle Expired - Fee Related CN101269687B (en)

Applications Claiming Priority (4)

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JP2007-074869 2007-03-22
JP2007074868A JP2008230478A (en) 2007-03-22 2007-03-22 Rear wheel suspension device for motorcycle
JP2007074869A JP2008230479A (en) 2007-03-22 2007-03-22 Swing arm mounting structure for motorcycle
JP2007-074868 2007-03-22

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