JPH056234Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a main stand mounting structure for a motorcycle. Regarding stand mounting structure.

(Prior Art) In recent years, the riding comfort of motorcycles has been improved by gradually increasing the rate of increase in the buffering force of a shock absorber with respect to the displacement of the rear wheel. Such motorcycles are
As described in Japanese Patent Application Laid-Open No. 55-60785,
A rear fork with a rear wheel supported is swingably attached to the vehicle body frame, a first link is connected to a support shaft installed in the vehicle width direction on the vehicle body frame, and a second link is connected to the rear fork with the first link. The links are swingably provided to form a link mechanism, and a shock absorber is interposed between the second link of the link mechanism and the vehicle body frame.

Incidentally, in the case of motorcycles, in order to facilitate maintenance of the rear wheels, it is desirable to provide a main stand on which the motorcycle can be stopped in an upright position. Such a main stand is attached by providing a dedicated mounting member for the vehicle body frame, and supporting the end portion on this mounting member. Therefore, even in a motorcycle having a link mechanism as described above, a main stand is attached to the body frame separately from the first link of the link mechanism. Furthermore, when attaching a main stand to a motorcycle that is not equipped with a main stand, the vehicle body frame is modified to provide an attachment portion, and the main stand is supported on this attachment portion.

(Problem to be solved by the invention) However, in the case of the above-mentioned motorcycle, a dedicated mounting member for mounting the main stand must be provided on the body frame so as not to interfere with the first link. , the degree of freedom in designing the body frame is restricted, the number of parts increases, the weight of the body frame increases, and the number of assembly steps increases.
Furthermore, there was a problem in that the vehicle body frame had to be modified.

This idea was made in view of the problems mentioned above, and it allows for a large degree of freedom in designing the body frame.
Another object of the present invention is to provide a motorcycle stand mounting structure that can reduce the number of parts and does not require modification of the vehicle body frame.

(Means for Solving the Problem) The main stand mounting structure for a motorcycle according to this invention has an engine equipped with a plurality of cylinders placed approximately in the center of the body frame, and a rear wheel mounted on the body frame behind the engine. A first link is attached to a support shaft that swingably supports a supported rear fork and is installed in the vehicle width direction on the vehicle body frame;
A link mechanism is configured by swingably supporting a second link connected to the first link on the rear fork, and a shock absorber is interposed between the second link mechanism of the link mechanism and the vehicle body frame. In the motorcycle equipped with the above-mentioned construction, the respective exhaust pipes extending from the plurality of cylinders are guided to the lower part of the vehicle body, and the exhaust pipes are gathered together in front of the link mechanism, and the exhaust pipes are further connected to the lower part of the link mechanism. A main stand is supported on the ground and extends rearwardly from the support portion of the first link of the support shaft to maintain the motorcycle in an upright position, and the main stand is configured to support the motorcycle in an upright position. A pair of left and right pipe-shaped members installed outside the mechanism and the exhaust pipe in the vehicle width direction, and passing in a curved manner below the exhaust pipe,
It is characterized by comprising a cross pipe connecting the left and right pipe-shaped members.

(Function) According to the main stand mounting structure for a motorcycle according to this invention, the main stand is supported by the support shaft that supports the first link of the link mechanism and is mounted to the vehicle body frame. Therefore, there is no need to provide a special mounting member on the vehicle body frame for mounting the main stand, the number of parts can be reduced and the weight can be reduced, and there is no interference between the main stand and the first link. There is a greater degree of freedom in design, and there is no need to modify the vehicle body frame.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

1 to 4 show a main stand mounting structure for a motorcycle according to an embodiment of this invention,
Figure 1 is a side view of the motorcycle, Figure 2 is an enlarged side view of the main parts, Figure 3 is an enlarged view of the main parts from the back, Figure 4 a is a front view of the main stand, and Figure 4 b is the main stand. FIG.

In the drawing, reference numeral 11 denotes a vehicle body frame, and a head tube 13 that supports a front fork 12 is fixed to the front end of the vehicle body frame 11. The front fork 12 has an upper end connected to a handle 14 and a lower end supporting a front wheel 15. Also,
The vehicle body frame 11 has a fuel tank 1 at the upper front part.
6 is a V-shaped 4 below this fuel tank 16.
A cylinder engine 17 has a seat 18 disposed behind the fuel tank 16, and a rear fork 19 extending in the front-rear direction at the lower rear part is attached to a bracket 20.
The front end is swingably supported through the The rear fork 19 supports a rear wheel 21 at its rear end, and also has a damper unit (buffer) 23 connected to the vehicle body frame 11 via a link mechanism 22 at its intermediate portion.
is interposed.

The link mechanism 22 includes a first link 24 and a second link 2, as shown in detail in FIGS. 2 and 3.
It consists of 5. The first link 24 is
A front end portion on the front side is rotatably connected to a support shaft 26 installed in the vehicle width direction on the vehicle body frame 11, and a rear end portion on the rear side is rotatably connected to a second link 25. The support shaft 26 is attached to the vehicle body frame 11
The engine 17 is supported by two mounting parts arranged in the vehicle width direction on the rear side of the exhaust collecting part 17a, and the first link 24 is connected between these mounting parts. Both ends of a main stand 27, which will be described later, are supported outward in the width direction. The second link 25 has a substantially dogleg shape, one end is rotatably connected to the lower end of the damper unit 23, the other end is rotatably connected to the middle part of the rear fork 19, The intermediate bent portion is rotatably connected to the rear end portion of the first link 24 described above.

As shown in FIGS. 4a and 4b, the main stand 27 is a pair of pipe-shaped members, one end of which is supported by the aforementioned support shaft 26 through brackets 29L and 29R, and tread members 30L and 30R fixed to the other end. 28L, 28R and these pipe-shaped members 28
A cross pipe 31 bridged between the intermediate portions of L and 28R is provided. Bracket 29L, 29
R has holes 32L and 32R into which the support shaft 26 fits, and is welded in the longitudinal direction of the pipe-like members 28L and 28R, so that it also functions as a reinforcing rib. A stopper 34 that comes into contact with a support plate 33 fixed to the vehicle body frame 11 is fixed to the bracket 29R of one pipe-shaped member 28R, and a hook 3 with a return spring 35 stretched between it and the support plate 33 is fixed.
6 is fixed to the intermediate portion of the pipe-like member 28R. As shown in FIG. 2, the support plate 33 has a buffer rubber 37 fixed to the portion that comes into contact with the stopper 34, and one end of a return spring 35 is locked to the end of the buffer rubber 37. In addition, the other pipe-shaped member 28L
A footrest 40 is fixed near the lower tread member 30L. In FIG. 3, reference numeral 38 indicates an exhaust pipe extending rearward from the exhaust gas collecting portion 17a of the engine 17, and the exhaust pipe 38 passes below the link mechanism 22 and extends rearward.

Next, the operation of this embodiment will be explained.

In this motorcycle, the rear fork 19 swings as the rear wheel 21 bounces and rebounds, and the swing of the rear fork 19 is transmitted to the damper unit 23 via the link mechanism 22, and the damping force of the damper unit 23 is transferred to the rear fork 19. The amount of rocking (angle) is gradually increased to improve riding comfort.

On the other hand, this motorcycle is located at main stand 27.
is rotated around the support shaft 26, and its footrest 4
Main stand 2 by strongly stepping on 0.
The tread members 30L and 30R of No. 7 are grounded to maintain an upright posture when the vehicle is stopped. Since this main stand 27 shares the support shaft 26 that supports the first link 24 of the link mechanism 22 as a support part, there is no need to provide a dedicated support part on the body frame 11, and the body frame 11 can be modified. It is possible to reduce the number of parts, reduce weight, and reduce manufacturing costs without having to do anything. Also, main stand 27
Since the movement is concentric with the first link 24, there is no risk of interference with the first link 24,
These layout decisions, i.e. body frame 1
The degree of freedom in the design of No. 1 also increases.

(Effects of the invention) As explained above, according to the main stand mounting structure for a motorcycle according to this invention, the number of parts is reduced because the body frame side support part of the link mechanism is shared as the support part of the main stand. This reduces weight and manufacturing costs, and also prevents the main stand from interfering with the links of the link mechanism. Furthermore, the main stand can be attached to a motorcycle that does not have a main stand without any modification to the body frame. In addition, in the present invention, each exhaust pipe extending from a plurality of cylinders is guided to the lower part of the vehicle body, and is gathered together in front of the link mechanism,
Furthermore, since the exhaust pipe is extended rearward through the lower part of the link mechanism, that is, the exhaust pipe is placed approximately at the lower center of the vehicle body, the exhaust pipe does not protrude to the side of the vehicle body, and the bank Enough corners can be secured. Moreover, since the left and right pipe-shaped members of the main stand avoid the exhaust pipe and pass outside the exhaust pipe in the vehicle width direction, it is possible to arrange the exhaust pipe in the center of the vehicle body from this perspective as well.

[Brief explanation of drawings]

1 to 4 show a main stand mounting structure for a motorcycle according to an embodiment of this invention,
Figure 1 is a side view of the motorcycle, Figure 2 is an enlarged side view of the main parts, Figure 3 is an enlarged view of the main parts from the back, Figure 4 a is a front view of the main stand, and Figure 4 b is the main stand. FIG. 11...Vehicle frame, 17...Engine, 1
7a...Exhaust collecting part, 19...Rear fork, 2
DESCRIPTION OF SYMBOLS 1... Rear wheel, 22... Link mechanism, 23... Damper unit, 24... First link, 25... Second link, 26... Support shaft, 27... Main stand, 33... Support Board, 34... Stoppa, 3
5...Return spring, 37...Buffer rubber.

Claims (1)

[Claims for Utility Model Registration] An engine with multiple cylinders is arranged approximately at the center of the vehicle body frame, and a rear fork that supports the rear wheel is swingably supported on the body frame behind the engine. A link mechanism is configured by swingably supporting a first link on a support shaft installed in the vehicle width direction and a second link connected to the first link on the rear fork, and In a motorcycle in which a shock absorber is interposed between a second link mechanism of the mechanism and the body frame, each of the exhaust pipes extending from the plurality of cylinders is guided below the vehicle body, and the exhaust pipe is connected to the second link mechanism of the link mechanism. The exhaust pipes are integrated at the front and extend rearward through the lower part of the link mechanism, and the motorcycle is grounded on the outside in the vehicle width direction from the support part of the first link of the support shaft. supporting a main stand held in an upright position, the main stand passing through a pair of left and right pipe-shaped members installed outside the link mechanism and the exhaust pipe in the vehicle width direction, and below the exhaust pipe in a curved manner; A main stand mounting structure for a motorcycle, comprising a cross pipe connecting the left and right pipe-shaped members.