JPS6238465Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pillion step mounting structure for a motorcycle.

A pillion step for a rear seat passenger of a motorcycle has conventionally been attached and supported via a stay that is directly welded to a rear fork, vehicle body frame, or the like. Therefore, it is necessary to provide sufficient strength and rigidity in the vicinity of the stay welding part of the vehicle body frame, etc., and it is also difficult to achieve the best possible assemblability of the pillion step.

This invention was made to improve this point,
The purpose of this is to fix a bracket along the corner formed by the center pipe at the rear of the engine and the rear stay that tilts upward from the center pipe toward the rear and runs the exhaust pipe along it, and to fix the bracket along the corner formed by the approximately triangular side surface corresponding to the bracket. The step holder mounting portion is fastened at three corners of the step holder mounting portion, and a pillion step mounting stay is integrally fixed to the rear end of the arm that extends behind the step holder mounting portion and below the exhaust pipe. However, by locating the pillion step attached to the pillion step mounting stay below the exhaust pipe, it is possible to avoid increasing the local strength and rigidity of the vehicle body frame.
To provide a pillion step mounting structure for a motorcycle, which increases the rigidity of the pillion step mounting part by rationally utilizing the structure of the vehicle body frame, and also improves the ease of assembling the pillion step to the vehicle body. be.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is an overall side view of a motorcycle having a pillion step structure according to the present invention, and FIG. 2 is a side view of the body frame of the same vehicle.

A head pipe 3 is fixed to the front end of the body frame 2 of the motorcycle 1 shown in FIG. 1. A stem shaft is rotatably inserted into the head pipe 3, and a handle 4 is provided at the upper end of the stem shaft as shown in the figure. It is permanently installed. Further, the upper end of a front fork 7 is fixed to the stem shaft via both top and bottom bridges 5 and 6, and a front wheel 8 forming a steering wheel is rotatably supported at the lower end of the front fork 7.

On the other hand, a fuel tank 9 and a seat 10 are arranged behind the head pipe 3, and below the fuel tank 9 are the cylinder 11a and the rear cylinder 11b.
A V-type engine 11 having a V-shape is mounted on the tower. An exhaust pipe 23 is provided in the front cylinder 11a.
However, exhaust pipes 25 are connected to the rear cylinders 11b, and exhaust mufflers 24 and 26 are connected to the rear ends of the exhaust pipes 23 and 25, respectively.

Further, the front end of a rear fork 12 is pivotally attached to the bent base of the down tube blower 18 constituting the vehicle body frame 2 by a pivot shaft 13 so as to be able to swing vertically. A ring 14 is rotatably supported.
Note that this rear fork 12 is suspended on the vehicle body side via a link mechanism (not shown).

FIG. 2 shows details of the vehicle body frame 2. In the figure, reference numeral 15 denotes a main pipe having the head pipe 3 fixed to its front end.
A down pipe 16 hangs down from the front lower part of the tank, and the down pipe 16 is made of a thick pipe and also serves as an oil tank. Note that 17 in the figure is an oil pipe.

The down tube blower 18 made of a thin pipe extends rearward from the lower end of the down pipe 16, the rear end of which is bent upward as shown in the figure, and the pivot shaft 1 is attached to the bent end.
A bracket 19 that inserts and supports 3 is connected.
A center pipe 20 is arranged above the bracket 19, and the upper end of the center pipe 20 is connected to the rear end of the main pipe 15.

The engine 11 is mounted on the vehicle body frame 2 by having its transmission case 11c supported by support brackets 16a, 18a, 20a projecting from each of the pipes 16, 18, 20.

On the other hand, a seat rail 21 extends rearward from the upper part of the center pipe 20, and from a position below the seat rail 21 and above the bracket 19, a rear stay 22 is fixed so as to tilt upward toward the rear. has been done.

The down pipe 16, lower down pipe 18, center pipe 20, seat rail 21, and rear stay 22 are all made of square pipes.

By the way, a triangular gusset 30b, which is a bracket, is integrally welded to the corner of the center pipe 20 and the rear stay 22.
A step holder attachment portion 31a having a substantially triangular side surface is attached and supported to the bracket 30 by fastening three points a, b, and c with bolts. An arm 31b extending rearward is integrally provided on the step holder attachment portion 31a. In this way, the step holder 31 is constituted by the step holder attachment portion 31a and the arm 31b. A pillion step mounting stay 32 is integrally welded to the rear end of the arm 31b of the step holder 31a, and a pillion step 33 is pinned to the stay 32 so as to be openable and closable. The pillion steps 33 are provided at symmetrical positions on both the left and right sides of the vehicle body.

In the above, the step holder 31 has high structural rigidity, and is fastened to the corner of the center pipe 20 and the rear stay 22, which is a structurally rigid part, thereby increasing the local strength and rigidity of the vehicle body frame. It is possible to increase the rigidity of the pillion step attachment portion by rationally utilizing the structure of the vehicle body frame, without having to increase the rigidity of the pillion step attachment portion.

Further, since the pillion step 33 can be easily assembled to the vehicle body by simply bolting the step holder 31 to the bracket 30, the ease of assembling the pillion step 33 is improved.

As is clear from the above description, according to the present invention, a bracket is installed at the corner of the center pipe that constitutes the vehicle body frame and the rear stay that is fixedly installed at a position above the rear fork pivot point of the center pipe and tilted upward toward the rear. and fasten a substantially triangular step holder to the bracket,
Since the pillion step mounting stay is integrally fixed to the rear end of the step holder, the rigidity of the pillion step mounting portion is increased by rationally utilizing the structure of the vehicle body frame without increasing the local strength and rigidity of the vehicle body frame. Furthermore, it is possible to improve the ease of assembling the pillion step to the vehicle body.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall side view of a motorcycle, and FIG. 2 is a side view of a body frame of the motorcycle. In addition, 1 in the drawing is a motorcycle, 2 is a body frame,
3 is the head pipe, 16 is the down tube, 18
is the down tube blower, 20 is the center pipe,
21 is a seat rail, 22 is a rear stay, 30 is a bracket, 31 is a step holder, 32 is a pillion step mounting stay, and 33 is a pillion step.

Claims (1)

[Scope of Claim for Utility Model Registration] In a motorcycle comprising a center pipe at the rear of the engine constituting a body frame, and a rear stay that is fixed upwardly tilted toward the rear at a position above the rear fork pivot point of the center pipe. , Attach an exhaust pipe along the rear stay, fix a bracket along the corner of the center pipe and the rear stay, and attach a step holder attachment part with a substantially triangular side surface corresponding to the bracket to the step holder attachment part. A pillion step that is fastened at three corners and is integrally fixed with a pillion step mounting stay to the rear end of an arm extending rearward from the step holder mounting portion and below the exhaust pipe, and is mounted on the pillion step mounting stay. A pillion step mounting structure for a motorcycle, characterized in that the pillion step is arranged below the exhaust pipe.