JP2007296926A - Suspension structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspension structure of a vehicle capable of shortening a line and improving manufacturing efficiency with a unit assembly by reducing a working man-hour in a completed vehicle assembly line. <P>SOLUTION: In this vehicle suspension structure, a suspension link 40 is provided between a swing unit U supporting rear wheels WR and a vehicle body frame F. A bottom end of the suspension link 40 is swingably supported on the swing unit U, and a top end is swingably journalled to the vehicle body frame F. A connection rod 50 separate from the suspension link 40 is provided between the swing unit U and the vehicle body frame F, and the bottom end of the connection rod 50 is supported on the swing unit U at a shaft different from that of the bottom end of the suspension link 40, and the top end of the connection rod 50 is supported on the vehicle body frame F coaxially with the top end of the suspension link 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle suspension structure suitable for a unit swing type motorcycle or the like.

Conventionally, in the vehicle manufacturing and assembly process, by assembling the vehicle components for each unit in advance, the number of work steps in the completed vehicle assembly line is reduced, and the cost is reduced by shortening the completed vehicle assembly line and improving the unit assembly manufacturing efficiency. I am trying to figure it out. For example, when a motorcycle as described in Patent Document 1 is assembled, a unitized swing unit is assembled to a body frame on a completed vehicle assembly line.
JP 2005-255163 A

By the way, in the above prior art, a suspension link and a compression rod different from this are provided between the unit swing and the vehicle body frame, and one end of each of these is pivotally supported by the unit swing while the other end is The vehicle body frame is supported on different axes. For this reason, when assembling a unit swing that includes a suspension link and a compression rod into a body frame, the other ends of the suspension link and the compression rod must be individually supported on the body frame. The number of man-hours in the line is likely to increase, which has affected the shortening of the line and the improvement of manufacturing efficiency by unit assembly.
Accordingly, the present invention provides a vehicle suspension structure that can reduce the number of work steps in a complete vehicle assembly line, shorten the line, and improve the production efficiency by unit assembly.

  As a means for solving the above problems, the invention described in claim 1 is directed to a swing unit (for example, the swing unit U of the embodiment) and a vehicle body frame (for example, the vehicle body frame of the embodiment) that support a wheel (for example, the rear wheel WR of the embodiment). F) is provided with a suspension link (for example, the suspension link 40 in the embodiment), and one side of the suspension link is pivotally supported on the swing unit and the other side is pivotally supported on the body frame (for example, implementation). In the suspension structure of the motorcycle 1) of the example, a connection member (for example, the connection rod 50 of the embodiment) different from the suspension link is provided between the swing unit and the vehicle body frame, and one side of the connection member is The swing unit is pivotally supported on a shaft different from one side of the suspension link, and the other side of the connecting member is pivotally supported on the body frame coaxially with the other side of the suspension link. I am characterized in.

  The invention described in claim 2 is characterized in that one side of the connecting member is pivotally supported rearward from one side of the suspension link in the swing unit.

  According to a third aspect of the present invention, the connecting member is disposed along the swinging direction of the swing unit in a side view of the vehicle, and an elastic member (for example, the embodiment) is provided on at least one of the swing unit and the body frame. It is characterized by being pivotally supported via each rubber bush 54, 55).

  According to a fourth aspect of the present invention, the vehicle body frame includes a pair of left and right seat rails (for example, the seat rail 16 of the embodiment), the suspension link and the other side of the connecting member are connected to the seat rail, and the seat An article storage box (for example, the article storage box 20a in the embodiment) is disposed between the rails, and the other side of the connecting member is connected to the left and right outer sides of the seat rail.

  According to the invention described in claim 1, with one side of the suspension link and the connecting member being pivotally supported on different axes by the swing unit, the other side is pivotally supported on the body frame by being coaxial with each other, Since the assembly work to the body frame of the swing unit that is unitized including the suspension link and the connecting member can be simplified, the work man-hours in the completed vehicle assembly line can be reduced, and the production efficiency by shortening the line and unit assembly can be reduced. Improvements can be made.

  According to the second aspect of the present invention, the influence on the arrangement space of the connecting member due to the arrangement of the cylinder portion of the engine, the intake system parts, and the like at the front portion of the swing unit is suppressed, and the layout freedom of the connecting member is improved. be able to.

  According to the third aspect of the present invention, it is possible to suppress the vibration of the swing unit from being transmitted to the vehicle body frame via the connecting member, and to suppress the vibration of the vehicle body frame and improve the riding comfort of the vehicle.

  According to the invention described in claim 4, compared to the case where the connecting member is connected to the left and right inner sides of the seat rail, the influence on the shape and capacity of the article storage box can be suppressed, and the degree of freedom of the box shape can be reduced. Improvement and increase in box capacity can be achieved.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the directions such as front, rear, left and right are the same as those in the vehicle unless otherwise specified. In the figure, the arrow FR indicates the front of the vehicle, the arrow LH indicates the left side of the vehicle, and the arrow UP indicates the upper side of the vehicle.

  In the scooter type motorcycle 1 that is a low-floor type vehicle shown in FIG. 1, the vehicle body frame F includes a head pipe 13 at the front end, and a front fork 11 and a steering handle 12 that pivotally support the front wheel WF are mounted on the head pipe 13. It is supported so that it can be turned. Also, on the lower rear side of the vehicle body frame F, an integral swing type power unit (hereinafter referred to as an engine E) which is a motor of the motorcycle 1 is disposed at the front and an axle S of the rear wheel WR which is a drive wheel is disposed at the rear. U, simply referred to as a swing unit).

  The upper side of the front part of the swing unit U is supported on the rear part of the vehicle body frame F via a suspension link 40 and a connecting rod 50 which will be described in detail later. On the other hand, the rear end portion of the swing unit U is supported by the rear end portion of the vehicle body frame F via a rear cushion 7 that is a shock absorber. Such a swing unit U can swing up and down with the rear wheel WR around the suspension link 40 as a pivot, and constitutes a so-called unit swing type rear suspension.

  The vehicle body frame F includes a pair of left and right upper down frames 14 that extend rearwardly downward from the head pipe 13 and then bend rearward, and extend rearwardly after extending downward from the head pipe 13 below the upper down frame 14. And a pair of left and right lower down frames 15 that bend and extend. The rear ends of the upper and lower down frames 14 and 15 are joined together by means such as welding.

  The front ends of a pair of left and right seat rails 16 extending rearward and upward are integrally joined to the rear portion of the upper down frame 14, and the front ends of the pair of left and right rear frames 10 extending rearwardly and below the seat rail 16. The parts are joined together. The rear end portion of the rear frame 10 is joined to the lower rear portion of the seat rail 16. The vehicle body frame F is mainly composed of the head pipe 13, the upper down frame 14, the lower down frame 15, the seat rail 16, and the rear frame 10.

  The vehicle body frame F is covered with a vehicle body cover 19. A tandem occupant seat 20 is disposed on the rear part of the vehicle body cover 19, and the occupant seat 20 opens and closes via a hinge (not shown), so that the occupant seat 20a below the occupant seat 20 is attached to the article storage box 20a. Access is possible. The article storage box 20a is provided across the occupant seat 20 and is disposed so as to enter between the left and right seat rails 16 (see FIG. 4). Reference numeral 18 denotes a fuel tank disposed in the front half of a portion surrounded by the upper and lower down frames 14 and 15.

2 and 3 together, the swing unit U is integrally provided with a front engine E and a rear left power transmission mechanism M.
The engine E is a single-cylinder engine with its crankshaft extending in the left-right direction. From the front end portion of the crankcase 21, the cylinder portion 22 is substantially horizontal toward the front (specifically, slightly upward). Projected. The crankcase 21 is divided into left and right case halves 21a and 21b, and the left case half 21a of the crankcase 21 is integrally provided with a left case body 23a that extends rearward from the left side of the rear part and then extends rearward. It is formed. The left case main body 23a constitutes the transmission case 23 in the power transmission mechanism M together with the left case cover 23b attached to the left side thereof. Reference numeral 21c denotes a right case cover attached to the right side of the crankcase 21.

  The power transmission mechanism M includes a belt-type continuously variable transmission mechanism 24 (see FIG. 1) formed by winding an endless belt around front and rear pulleys, and the output of the belt-type continuously variable transmission mechanism 24 is reduced to a rear output shaft ( And a gear type reduction mechanism 25 (see FIG. 3) for outputting to the axle S). The belt type continuously variable transmission mechanism 24 is accommodated across the transmission case 23 and the gear reduction mechanism 25 is accommodated inside the rear portion of the transmission case 23. A rear wheel WR is attached to the axle S that protrudes to the rear right side of the transmission case 23.

  A front end portion of an auxiliary arm 26 that extends forward and backward and supports the right end portion of the axle S is attached to the rear right side of the right case half 21 b of the crankcase 21. The auxiliary arm 26 and the transmission case 23 serve as left and right arms that support the rear wheel WR, and the entire swing unit U can swing up and down together with the rear wheel WR. At the rear ends of the transmission case 23 and the auxiliary arm 26, unit side cushion connecting portions 27 that pivotally support the lower ends of the pair of left and right rear cushions 7 are provided, and the upper ends of the rear cushions 7 are respectively The left and right seat rails 16 are respectively pivotally supported by the vehicle body side cushion connecting portions 17 at the rear end portions.

  As shown in FIG. 1, a throttle body 28 as an intake system component is disposed above the cylinder portion 22 of the engine E, and the throttle body 28 is connected to an intake port on the upper side of the cylinder portion 22 via an insulator or the like. . An air cleaner case (not shown) is disposed behind the throttle body 28. The base end of the exhaust pipe 29 is connected to the exhaust port on the lower side of the cylinder portion 22, and the exhaust pipe 29 is bent around the engine E and extends rearward and is connected to a silencer 29 a disposed on the right side of the rear wheel WR. (See FIG. 3).

  As shown in FIGS. 2 and 4, a pair of left and right vehicle body side connecting portions 31 that pivotally support the upper end portion of the suspension link 40 are provided between the left and right middle portions of the seat rail 16 and the left and right middle portions of the rear frame 10. Provided. Each vehicle body side connecting portion 31 includes inner and outer plate members 31a that sandwich the seat rail 16 and the rear frame 10 from the left and right sides, and a cylindrical support pipe 31b that penetrates these members along the left and right directions. The support pipes 31b are coaxial with each other, and are provided integrally with the plate members 31a, and the vehicle body side connecting portions 31 are integrally provided with the vehicle body frame F. A vehicle body side connecting shaft 32 extending in the left-right direction can be inserted into the support pipe 31 b, and the upper end portion of the suspension link 40 is interposed between the left and right vehicle body side connecting portions 31 through the vehicle body side connecting shaft 32. Connected to

  On the other hand, on the upper part of the crankcase 21 of the engine E in the swing unit U, a pair of left and right unit side connecting portions 33 that pivotally support the lower end portion of the suspension link 40 are provided. Each unit side connecting portion 33 is formed with a shaft insertion hole extending in the left-right direction coaxially. A cylindrical metal bush outer 35 is inserted into and fixed to each shaft insertion hole by means such as press fitting. At the same time, a metal bush inner 36 having the same cylindrical shape is inserted into the metal bush outer 35. The metal bush inner 36 can be relatively rotated by sliding the outer periphery thereof to the inner periphery of the metal bush outer 35. A unit side connecting shaft 34 extending in the left-right direction can be inserted into the metal bush inner 36, and the lower end portion of the suspension link 40 is located between the left and right unit side connecting portions 33 via the unit side connecting shaft 34. Connected to U.

  The suspension link 40 is formed by integrally joining a plurality of types of steel materials by welding or the like, and has a link main body 41 that extends in a vertical direction in a side view and link unit side pipes 42 that are respectively arranged at the upper and lower ends thereof. And a link vehicle body side pipe 43. The pipes 42 and 43 are parallel to each other. The pipes 42 and 43 are aligned in the left-right direction, and the link 40 is tilted slightly forward from the upright state in a side view of the vehicle body, and the suspension link 40 is Attached to.

  The link main body 41 is formed by extending left and right separate branch arms 41b having relatively narrow left and right widths from both sides of the upper part of the integrated lower end 41a having relatively wide left and right widths in a plan view (rear view), for example, A hollow closed cross-sectional structure composed of a plurality of press-formed parts is formed. In the layout of the swing unit U, the left and right unit side connecting portions 33 and the link unit side pipe 42 are offset to the left side from the vehicle body left and right center position (the vehicle body left and right center is indicated by a line CL). The link main body 41 also has a left-right asymmetric configuration.

  The link unit side pipe 42 has a cylindrical shape extending linearly across the left and right sides of the lower end portion 41a of the link body 41, and the link unit side rubber bush 44 is inserted inside the both end portions by means such as press fitting. Fixed. The link unit side rubber bush 44 is formed by integrally forming a relatively thin rubber layer 44c between the metal inner and outer cylinders 44a, 44b, and the outer periphery of the outer cylinder 44b is brought into close contact with the inner periphery of the link unit side pipe 42. The unit side connecting shaft 34 can be inserted into the inner cylinder 44a. Between the inner cylinders 44a of the left and right link unit side rubber bushes 44, a center collar 45 having inner and outer diameters equivalent to these is sandwiched.

  Both end portions of the link unit side pipe 42 are arranged adjacent to the left and right inner sides of the left and right unit side connecting portions 33 at the upper part of the crankcase 21, and in this state, the metal bush inner 36, the inner cylinder 44a of the link unit side rubber bush 44, and By inserting a long connecting bolt 34a (unit side connecting shaft 34) penetrating the center collar 45 to the left and right, and tightening the connecting bolt 34a and a nut 34b screwed to the connecting bolt 34a, a metal bush inner 36, a link The inner cylinder 44a of the unit side rubber bush 44 and the center collar 45 are fastened together. At this time, the metal bush inner 36 is rotatable relative to the metal bush outer 35 about the axis, and the inner cylinder 44a of the link unit side rubber bush 44 rotates about the axis by the twist of the rubber layer 44c with respect to the outer cylinder 44b. Relative rotation is possible.

  The left and right link vehicle body side pipes 43 have a relatively short cylindrical shape on the left and right sides, are arranged coaxially with each other, and have a slightly larger diameter than the link unit side pipe 42. A link vehicle body side rubber bush 46 is inserted and fixed inside each link vehicle body side pipe 43 by means such as press fitting. The link vehicle body side rubber bushing 46 is formed by integrally forming a relatively thick rubber layer 46c between the metal inner and outer cylinders 46a, 46b, and the outer periphery of the outer cylinder 46b is in close contact with the inner periphery of the link vehicle body side pipe 43. The vehicle body side connecting shaft 32 can be inserted into the inner cylinder 46a.

  The left and right link vehicle body side pipes 43 are arranged adjacent to the left and right inner sides of the left and right vehicle body side connecting portions 31, respectively. The inner cylinder 46a of the link vehicle body side rubber bush 46 and the support pipe 31b are integrally fastened by inserting the side connecting shaft 32) and tightening the connecting bolt 32a and the nut 32b screwed to the connecting bolt 32a. . At this time, the inner cylinder 46a of the link vehicle body side rubber bush 46 can be rotated relative to the outer cylinder 46b about the axis by the twist of the rubber layer 46c.

  The connecting rod 50 is disposed between the vehicle body frame F and the swing unit U separately from the suspension link 40 on the right side of the vehicle body, and is formed by integrally joining a plurality of types of steel materials by welding or the like. The rod main body 51 includes a rod unit side pipe 52 and a rod vehicle body side pipe 53 that are respectively disposed at both ends thereof. The pipes 52 and 53 are parallel to each other, and the connecting rod 50 is attached to the vehicle body with the pipes 52 and 53 extending in the left-right direction and the rod body 51 tilted slightly forward from the upright state.

  A rear portion connecting portion 37 that pivotally supports the lower end portion of the connecting rod 50 is provided at a position slightly behind the right side unit side connecting portion 33 in the upper part of the crankcase 21. A rod unit side connecting shaft 38 extending in the left-right direction is inserted and supported in the rear connecting portion 37, and a lower end portion of the connecting rod 50 is connected to the rear connecting portion 37 via the rod unit side connecting shaft 38. That is, the lower end portion of the connecting rod 50 is pivotally supported by the swing unit U on a different axis from the lower end portion of the suspension link 40.

On the other hand, the upper end portion of the connecting rod 50 is disposed adjacent to the right and left inner sides of the vehicle body at the upper right end portion of the suspension link 40 and is connected to the vehicle body frame F via the vehicle body side connecting shaft 32 together with the upper right end portion. That is, the upper end portion of the connecting rod 50 is pivotally supported by the vehicle body frame F so as to be coaxial with the upper end portion of the suspension link 40.
Thereby, in the vehicle body side view, a triangular structure with the connecting rod 50, the suspension link 40, and the upper part of the crankcase 21 as the sides is formed. Here, the connecting rod 50 has a swinging direction (indicated by an arrow Y in FIG. 2) in order to restrict the vertical swinging of the swing unit U through the metal bush outer 35 and the inner 36 at the lower end of the suspension link 40 in particular. It extends up and down to follow.

  The rod unit side pipe 52 has a short cylindrical shape on the left and right, and a rod unit side rubber bush 54 is inserted and fixed therein by means such as press fitting. The rod unit side rubber bush 54 is formed by integrally forming a relatively thin rubber layer 54c between the metal inner and outer cylinders 54a and 54b, and the outer periphery of the outer cylinder 54b is brought into close contact with the inner periphery of the rod unit side pipe 52. The rod unit side connecting shaft 38 can be inserted into the inner cylinder 54a.

  The rod unit side pipe 52 is disposed, for example, inside the rear connecting portion 37, and in this state, the connecting bolt 38a (the rod unit side connecting shaft that penetrates the rear connecting portion 37 and the inner cylinder 54a of the rod unit side rubber bush 54 from side to side. 38), the lower end portion of the connecting rod 50 is supported by the rear connecting portion 37 so as to be rotatable about the axis in a state where the connecting bolt 38a and the nut 38b screwed to the connecting bolt 38a are tightened.

  The rod body side pipe 53 has a short cylindrical shape on the left and right, has substantially the same inner and outer diameters as the link body side pipe 43, and is slightly larger in diameter than the rod unit side pipe 52. A rod vehicle body side rubber bush 55 is inserted and fixed inside the rod vehicle body side pipe 53 by means such as press fitting. The rod vehicle body side rubber bush 55 is formed by integrally forming a relatively thick rubber layer 55c between the metal inner and outer cylinders 55a and 55b, and the outer periphery of the outer cylinder 55b is in close contact with the inner periphery of the rod vehicle body side pipe 53. The vehicle body side connecting shaft 32 can be inserted into the inner cylinder 55a.

  The rod body side pipe 53 is disposed adjacent to the left and right inner sides of the link body side pipe 43, for example, and in this state, the inner cylinder 55a of the rod body side rubber bush 55, the inner cylinder 46a of the link body side rubber bush 46, and the support pipe 31b are provided. It is integrally fastened through the connecting bolt 32a (vehicle body side connecting shaft 32). At this time, the inner cylinder 55a of the rod vehicle body side rubber bush 55 can rotate relative to the outer cylinder 55b about the axis by the amount of twist of the rubber layer 55c.

  Here, referring also to FIG. 5, in the rod vehicle body-side rubber bush 55, the rubber layer 55 c is connected to, for example, a connecting rod 50 in order to promote bending in the connecting rod 50 longitudinal direction (the axial direction of the rod body 51). A lightening portion 56 is formed on the upper and lower sides in the longitudinal direction of the rod 50. The lightening portion 56 is, for example, a slit-like one that is long in the width direction of the rod body 51 when viewed in the bush axis direction, and is formed as a through hole that penetrates the rubber layer 55c in the bush axis direction. Relative movement in the longitudinal direction of the connecting rod 50 between the inner and outer cylinders 55a and 55b (specifically, in the longitudinal direction of the connecting rod 50 in a state where the upper end of the connecting rod 50 is pivotally supported by the vehicle body frame F) by the thinned portion 56. Movement) is positively permitted. The shape or the like of the thinned portion 56 is not limited as long as it facilitates bending of the rubber layer 55c in a specific direction.

  In such a suspension structure of the motorcycle 1, when the swing unit U swings up and down, the link vehicle body side rubber bushing 46 at the upper end of the suspension link 40 is twisted, and the metal bush outer 35 at the lower end of the suspension link 40 and The inner 36 slides. At this time, the rod vehicle body side rubber bush 55 at the upper end of the connecting rod 50 is also twisted, and a load accompanying swinging of the swing unit U is input to the connecting rod 50 as a compressive load in the longitudinal direction of the connecting rod 50. .

When a load along the longitudinal direction is input to the connecting rod 50, the rubber bushes 54 and 55 at both ends thereof bend, and the swing unit U is allowed to swing up and down. In particular, in the rod vehicle body side rubber bush 55, the swing unit U can swing well in the vertical direction by positively allowing the connecting rod 50 to bend in the longitudinal direction.
Moreover, the upper and lower ends of the suspension link 40 and the connecting rod 50 are connected to the vehicle body frame F or the swing unit U via the rubber bushes 44, 46, 54, 55, so that vibration from the swing unit U is suspended. It is difficult to be transmitted to the vehicle body frame F via the connecting rod 40 and the connecting rod 50.

  Here, when the swing unit U is assembled to the vehicle body frame F in the completed vehicle assembly line of the motorcycle 1, first, the lower end portions of the suspension link 40 and the connecting rod 50 are attached to the swing unit U in the predetermined unit assembly line. These are connected to form an integral unit. At this time, the lower ends of the suspension link 40 and the connecting rod 50 are connected to the swing unit U on different axes, but this connection work should be performed relatively easily with the swing unit U separated from the vehicle body frame F. Can do.

  Next, the swing unit U, the suspension link 40, and the connecting rod 50, which are integrated as described above, are transferred to the completed vehicle assembly line, and are assembled to the vehicle body frame F. At this time, since the upper ends of the suspension link 40 and the connecting rod 50 are coaxially connected to the vehicle body frame F using a single connection shaft, the connection in a state where the swing unit U is combined with the vehicle body frame F. It is possible to relatively simplify the work.

  As described above, the suspension structure of the motorcycle 1 in the above embodiment includes the suspension link 40 between the swing unit U that supports the rear wheel WR and the vehicle body frame F, and the lower end portion of the suspension link 40 is the above-described suspension link 40. An upper end portion of the swing unit U is pivotally supported by the body frame F so as to be swingable. A connecting rod separate from the suspension link 40 is provided between the swing unit U and the body frame F. 50, and a lower end portion of the connecting rod 50 is pivotally supported on the swing unit U on a different axis from the lower end portion of the suspension link 40, and the upper end portion of the connecting rod 50 is suspended on the vehicle body frame F. It is pivotally supported coaxially with the upper end of the link 40.

  According to this configuration, with the lower ends of the suspension link 40 and the connecting rod 50 supported on the swing unit U on different axes, the upper ends of the suspension link 40 and the connecting rod 50 are supported on the vehicle body frame F coaxially. Since the assembly work of the swing unit U including the link 40 and the connecting rod 50 to the vehicle body frame F can be simplified, the number of work steps in the completed vehicle assembly line can be reduced. The production efficiency can be improved.

  Further, in the suspension structure, the lower end portion of the connecting rod 50 is pivotally supported rearward from the lower end portion of the suspension link 40 in the swing unit U, so that the engine E in the front portion of the swing unit U is supported. The influence on the arrangement space of the connecting rod 50 due to the arrangement of the cylinder portion 22 and the intake system parts can be suppressed, and the layout flexibility of the connecting rod 50 can be improved.

  Further, in the suspension structure, the connecting rod 50 is disposed along the swinging direction of the swing unit U in a side view of the vehicle, and the rubber bushes 54 and 55 are attached to the swing unit U and the vehicle body frame F. , The vibration of the swing unit U can be suppressed from being transmitted to the vehicle body frame F via the connecting rod 50, and the ride comfort can be improved by suppressing the vibration of the vehicle body frame F. .

The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 6, the upper end portion of the connecting rod 50 is disposed adjacent to the left and right outer sides of the vehicle body side connecting portion 31 on the right side of the vehicle body frame F. It is good also as a structure which connected the upper end part to the vehicle body side connection part 31 (seat rail 16) from the vehicle body left-right outer side. According to this configuration, compared to the case where the connecting rod 50 is connected to the seat rail 16 from the left and right inner sides of the vehicle body (see FIG. 4), the influence on the shape and capacity of the article storage box 20a can be suppressed. The degree of freedom can be improved and the box capacity can be increased.
Alternatively, the upper end portion of the connecting rod 50 may be disposed between the suspension link 40 and the vehicle body side connecting portion 31, and the connecting rod 50 itself may be provided on the left side of the vehicle body, or provided on the left and right sides of the vehicle body. Also good.

Further, the suspension link 40 may be plate-shaped or rod-shaped, and the connecting rod 50 may be plate-shaped or press-formed. Furthermore, an elastic member such as a rubber bush may be interposed only on one side of the suspension link 40 and the connecting rod 50.
The configuration in the above embodiment is an example of the present invention, and is applied to a swing arm type suspension instead of a unit swing type, applied to a front suspension, applied to a three-wheel or four-wheel vehicle, etc. It goes without saying that various modifications can be made without departing from the gist of the invention.

1 is a side view of a motorcycle according to an embodiment of the present invention. FIG. 4 is a side view around the swing unit of the motorcycle. It is upper surface explanatory drawing around the said swing unit. It is sectional explanatory drawing of the suspension structure of the said swing unit. It is AA sectional drawing of FIG. It is sectional explanatory drawing equivalent to FIG. 4 which shows the modification of the said Example.

Explanation of symbols

1 Motorcycle (vehicle)
WR Rear wheel (wheel)
U swing unit F body frame 16 seat rail 20a article storage box 40 suspension link 50 connecting rod (connecting member)
54 Rod unit side rubber bush (elastic member)
55 Rod body side rubber bush (elastic member)

Claims (4)

In a vehicle suspension structure comprising a suspension link between a swing unit supporting a wheel and a vehicle body frame, one side of the suspension link being pivotally supported on the swing unit and the other side being pivotally supported on the vehicle body frame,
A connecting member different from the suspension link is provided between the swing unit and the vehicle body frame, and one side of the connecting member is pivotally supported by the swing unit on a different axis from the one side of the suspension link, A suspension structure for a vehicle, wherein the other side of the connecting member is pivotally supported on the body frame coaxially with the other side of the suspension link. The vehicle suspension structure according to claim 1, wherein one side of the connecting member is pivotally supported rearward of one side of the suspension link in the swing unit. The connecting member is disposed along a swinging direction of the swing unit in a side view of the vehicle, and is pivotally supported by at least one of the swing unit and the vehicle body frame via an elastic member. Item 3. The vehicle suspension structure according to Item 1 or 2. The vehicle body frame includes a pair of left and right seat rails, the suspension link and the other side of the connecting member are connected to the seat rail, an article storage box is disposed between the seat rails, and the other side of the connecting member is the The vehicle suspension structure according to any one of claims 1 to 3, wherein the vehicle suspension structure is connected to the left and right outer sides of the vehicle body of the seat rail.

Images