JPS6228037B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a side grip that is provided at the rear of a motorcycle and used for lifting the rear part of the vehicle body when the main stand is raised.

Large motorcycles have heavy bodies, so side grips are provided to lift the rear part of the motorcycle when the main stand is raised, and the side grips are also used as grips for rear seat passengers when riding. Functionally, side grips are generally provided at the rear of the vehicle body frame.

On the other hand, the rear part of the frame of a motorcycle has an Atsupa pipe that forms a seat rail that extends rearward from the rear of the main frame member, and an Atsupa pipe that extends diagonally rearward and upward from the lower part of the center pipe that hangs downward from the rear of the main frame member. It consists of an obliquely arranged subtube with the end and end joined together.

In the conventional rear part of such a frame, the tip of the subtube is joined to the middle part of the upper pipe, so the rear part of the upper pipe becomes long and overhangs, and in order to provide the side grip that carries the load as described above. , requires increased rigidity. In order to take measures against such rigidity, it is necessary to add reinforcing members or increase the pipe diameter of frame members, which increases the weight of the frame, and if the frame structure becomes complicated, manufacturing becomes complicated. , there are disadvantages such as an increase in the number of frame components.

The present invention has been made in view of the above, and its object is to join the rear end of the subtube to the vicinity of the rear end of the upper pipe, provide brackets at the front and rear of the joint, and attach the front and rear side grips to the brackets. The present invention provides a side grip support structure that has high rigidity and can sufficiently support the load applied to the side grips by attaching and supporting the ends, and also provides a simple frame with excellent rigidity and strength while providing side grips. To provide a side grip support structure for a motorcycle that is easy to manufacture, lightweight, and allows for increasing the strength of joints by using side grip brackets.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of a motorcycle, and to explain its outline, a motorcycle 1 has a front fork 4 that supports a front wheel 5 via a head tube 3 at the front end of a frame 2, which can be freely steered by upper and lower bridges 6 and 7. There is a handle 8 on the top bridge 6.
Equipped with. An engine 9 is mounted on the lower front part of the frame, a fuel tank 10 is mounted on the upper part, and a seat 11 is mounted and arranged behind the fuel tank 10. A rear fork 12 pivots and extends rearward from the rear lower part of the front part of the frame, and the axle 14 of the rear wheel 13 is supported at the rear end of the rear fork 12, and a curved gutter-shaped rear fender 15 is provided at the rear of the frame above the rear wheel 13. is installed.

The frame structure of the above-described motorcycle will be described in detail with reference to FIG.
A backbone-shaped main pipe 201 with a large diameter extends backward slightly from the top of the main pipe 201.
There are two left and right down tubes 202 hanging down from the lower part of the head tube 3, two down tube blowers 203 extending rearward from the lower ends of these down tubes 202, and two down tube blowers 203 that are slightly tilted forward from their rear ends. It is provided with left and right center pipes 204 erected upward and joined to the rear end portion of the main pipe 201, and these members constitute the front part A of the frame, including the down tube 202, the lower 203, and the center pipe 204.
For example, it is constructed by forming a single pipe material.
An engine is disposed in a space surrounded by the main pipe 201, the down tube 202, the lower tube 203, and the center pipe 204 in the front part A of the frame, and the fuel tank 10 is disposed astride the main pipe 201.
The front end of the rear fork 12 is pivotally supported by a bracket 205 provided at the bottom of the center pipe 204.

Upper pipes 206 forming seat rails on the left and right extend rearward from the upper ends of the left and right center pipes 204, and the front ends 206a of the pipes 206 are joined to the upper ends of the center pipes 204. Cross members (not shown) are installed at appropriate locations on the left and right setter pipes. On the other hand, a subtube 207 extends rearward from the lower portions of the left and right center pipes 204 so as to be inclined slightly rearward and upward, and a front end 207a of the subtube 207 is joined to the lower portion of the center pipe 204. The subtube 207 is formed of pipe material in a substantially straight shape,
The subtube 207 is long and its rear end 207b
Connect 208 to the rear of Atsupa pipe 206 as much as possible.
do. The frame rear part B is constructed from the above. Specifically, this joint portion 208 is set at the following position.

Seat 11 is a tandem seat for two people.
The front seat 111 is located behind the fuel tank 10 and faces above the middle or front part of the upper pipe 206, and the rear seat 112, which is continuous with the front seat, faces the rear of the upper pipe 206, and the joint 208 is located approximately below the hip point of the front seat 111.
is coming. And the joint 208 is the rear fork 12
This is approximately above the axle 14 of the vehicle. Furthermore, it is located in the vicinity of the highest intermediate portion 15a of the curved portion of the rear fender 15 facing above the rear wheel 13, and is located behind the central portion in the front-rear direction.

In this way, the rear end 207b of the subtube 207
is joined 208 at the rear of the Atsupa pipe 206 as close as possible to the rear end, so the amount of overhang from this point on at the rear of the Atsupa pipe becomes small,
In addition, the rigidity of the rear part of the frame is improved by the long truss structure from front to back, so the reinforcing member for increasing the rigidity of the upper pipe does not increase the diameter of the pipe, reducing the number of frame components and reducing the number of frame components. Simplification, ease of manufacture, and further weight reduction can be achieved. And as mentioned above, the center pipe 20
4. The triangular space surrounded by the top pipe 206 and the subtube 207 is large, and can accommodate, for example, the air cleaner 16, oil tank 17, battery 18, and the reservoir tank 19 all at once since this embodiment employs a water-cooled engine. Moreover, the capacity of these devices can be set large.

The rear end portions 20 of the above left and right Atsupa pipes 206
A plate-shaped stay 209 is attached to 6b, and the stay 209 is used to mount and support a part of the fender 15 described above, or to mount and support a tail light unit 20 such as a blinker or a brake lamp.

Subtube 20 of left and right Atsupapipe 206
7. Rear brackets 21, 21 hang down behind the joint 208 with the rear end 207b.
21 is joined at the upper end 21a to the front of the rear end of the upper pipe 206, and forms a concave planar shape as shown in the fourth figure to increase strength. A cross member 210 installed over the rear ends of the upper pipes 206, 206 provided with the brackets 21, 21 supports the rear lower part of the seat 11, and also supports the fender, tail light unit, etc., and mounts and supports them. mounting holes 210a..., 210b are provided.

Front brackets 22, 22 hang down near the front of the joint 208, and the bracket 22 has a support part 22a hanging down from the front of the rear end of the subtube 207. The bracket 22 has a main body 22b that is vertically long, and the middle part 22c of this is connected to the part 207c in front of the rear end 207b of the subtube 207, and the top pipe 206 of the upper part 22d.
It is joined to the part 206c in front of the joint part 206c. In the embodiment, the top pipe 206 of the bracket 22
A secondary bracket 22e is provided on the upwardly projecting portion to support a seat or the like.

The L-shaped bent front and rear ends 23a and 23b of the side grip 23 formed of pipe material, round bar, etc. are connected between the lower parts of the brackets 22 and 21 provided before and after the joint part 208, and this is tied together. Provide mounting support.

As is clear from the above, according to the present invention, in addition to obtaining a simple, easy-to-manufacture, and lightweight frame as described above, in providing the side grips, front and rear brackets are attached to the front and rear of the joint of the upper pipe and subtube, The rear bracket is close to the joint, and the overhang behind the joint is short, so it is supported by a part that is strong in rigidity and strength.This also eliminates the need for reinforcing members, and the front bracket also has excellent rigidity and strength. Since it is installed close to the front of the joint, it can sufficiently support the load from the side grips, and while side grips are attached, there is no need for a reinforcement structure at the rear end of the frame, simplifying the frame structure and reducing the number of parts. Furthermore, by spanning the front bracket over the upper pipe and subtube near the joint, it can contribute to increasing the strength and rigidity of the joint.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of the motorcycle, Fig. 2 is a side view of the frame, Fig. 3 is an enlarged side view of the side grip portion, and Fig. 4 is a plan view thereof. In the drawings, 1 is a motorcycle, 2 is a frame, 3 is a head tube, 201 is a main pipe that is a main frame member, 204 is a center pipe that is a hanging member, 206 is a top pipe that is a rear member, 207 is a sub member that is a sub tube, 21 and 22 are brackets, and 23 is a side grip.

Claims (1)

[Claims] 1. A main frame member that extends rearward from a head tube that supports the front wheel in a steerable manner, a rear member that extends rearward from the member and forms a seat rail, and a member that hangs downward from the rear of the main frame member. It consists of a diagonally arranged sub-member that connects the lower part of the hanging member and the rear member, the rear end of the sub-member is joined near the rear end of the rear member, and a rear bracket is attached to the rear end of the rear member. A side grip support structure for a motorcycle, characterized in that a front bracket is attached to the rear end of the sub member near the joint between the sub member and the rear member, and both ends of the side grip are mounted and supported between the brackets.