JPS6240869Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the body structure of a motorcycle, and is designed to increase the space in the center of the body of a motorcycle that uses only one cushion unit, thereby limiting the layout of parts. It is designed to reduce the amount of

A motorcycle has a bell crank pivotally attached to the front of the rear wheel, which is approximately the center of the body frame, and one cushion unit is attached to the front end of the bell crank, and a cushion unit is attached between the rear end of the bell crank and the swing arm. There is one with a push rod attached.
This type of motorcycle has a bell crank and a cushion unit in the center of the body, so
There were problems such as limiting the volume of other parts present in this part, ie, the air cleaner, and also placing restrictions on the muffler piping.

The present invention is an attempt to improve the above points by making the structure of the car body frame asymmetrical to obtain a large space in the center of the car body, thereby reducing the volume of the air cleaner. It is designed to be large enough to provide flexibility in the muffler piping.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In Fig. 1, reference numeral 1 denotes a vehicle body frame, which has a main pipe 3 with a head pipe 2 attached to its front end, a seat rail 4 whose front end is fixed to the rear end of this main pipe 3, and an upwardly open shape. A down tube 5 whose front end is fixed to the head pipe 2 and its rear end is fixed to the seat rail 4.
, a lower reinforcing pipe 6 that connects the main pipe 3 and the lower part of the down tube 5, an upper reinforcing pipe 7, a seat rail 8, etc., which will be described later.

Generally, the body frame of a motorcycle is symmetrical when viewed from above, but in the present invention it is asymmetrical. That is, main pipe 3
The seat rail, whose front end was conventionally fixed symmetrically to the rear end, is now only on the left side of the vehicle body frame 1, as shown in Figure 2, and the right side is first fixed along the extension line of the main pipe 3. The vehicle body frame 1 is made up of an upper reinforcing pipe 7 extending to the support shaft 10 of the bell crank 9, and a right seat rail 8 whose front end is fixed to the upper reinforcing pipe 7 and whose rear end extends along the aforementioned seat rail 4. has been configured. Reference numeral 11 designates a swing arm whose front end is pivotally connected to the downtube 5 by a shaft 12, and reference numeral 13 designates a rear wheel supported by an axle 14 at the rear end of the swing arm 11.

This motorcycle with the body frame 1 configured in this manner has a larger space on the left side of the vehicle body (lower side in FIG. 2) where the upper reinforcing pipe 7 is not provided than the conventional motorcycle, so the cushion unit 15 is attached to the upper reinforcing pipe. 7, and an air cleaner (not shown) with a sufficiently large capacity can be placed next to it. In FIG. 1, 16 is a push rod connecting the rear end of the bell crank 9 and the middle portion of the swing arm 11, and 17, 18, 19, and 20 are pivots.

Since the present invention is constructed as described above, it is possible to expand the space that was conventionally restricted by the cushion unit and bell crank provided in the center of the vehicle body, and therefore, the It becomes possible to increase the capacity of the air cleaner, and by eliminating the above-mentioned restrictions, it is possible to improve the degree of freedom in arranging parts provided in the center of the vehicle body. In addition, in this regard, the muffler can be easily handled in terms of design.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main parts of a vehicle body frame according to an embodiment of the present invention, and FIG. 2 is a plan view of the main parts of the body frame shown in FIG. 1...Vehicle frame, 2...Head pipe, 3
... Main pipe, 4, 8 ... Seat rail, 7
... Upper reinforcement pipe, 9 ... Bell crank, 15
...Cushion unit.

Claims (1)

[Scope of utility model registration request] In a motorcycle having a body frame in which a front end of a seat rail is fixed to the rear end of a main pipe with a head pipe attached to the front end, a seat rail extending rearward is attached to one side of the rear end of the main pipe, and a seat rail extending rearward is attached to the other side of the rear end of the main pipe. A reinforcing pipe extending to the support shaft of the bell crank is attached along the extension line of the main pipe, and the front end of the other side seat rail extending along the seat rail is attached in the middle of the reinforcing pipe, and the reinforcing pipe is provided. A body structure for a motorcycle, characterized in that a cushion unit is disposed closer to the side and attached to the bell crank.