JPH02158482A - Motor bicycle and tricycle - Google Patents

Abstract

PURPOSE:To ensure a wide pace in the rear of a head pipe by a method wherein down frames branched downward from a head pipe and extended rearwardly from the lower ends of the down frames are disposed outside the moving range of a front wheel. CONSTITUTION:In a frame body 1 of a scooter type vehicle, front and side down frames 3 and 4 are branched from the lower part of a head pipe 2 toward both the front and two sides. A you-shaped main frame 5 is connected to the lower ends of the down frames 3 and 4. The down frames 3 and 4 and the main frame 5 are disposed outside the moving range of a front wheel 10 so that, even when the front wheel 10 is steered, the frames are prevented from interference with the front wheel. Meanwhile, a rear frame 6 is connected to the rear part of the main frame 5. A front cover 15 and a leg shield 16 are disposed to the front and the rear of the head pipe 2. This constitution increases a length F of a foot rest 17.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in the frame of a motor vehicle having one front wheel, such as a motorcycle or a tricycle.

(Prior Art) The down frame of this type of vehicle frame branches from the rear surface of the head pipe and is placed rearward from the rear end of the front wheel so as not to interfere with the front wheel (for example,
-123751).

Generally, a front fender is attached to the front part of this head pipe and down frame, and a leg shield is attached to the rear part to block the front of the driver's legs, and a seat is provided behind the leg shield. ing.

(Problem to be Solved by the Invention) In the conventional vehicle described above, since the down frame is located behind the front wheels, the lower part of the leg shield attached to the down frame is located close to the seat side. However, there is a problem in that it is not possible to ensure a sufficient front-to-back length of the footrest.

Therefore, an object of the present invention is to provide a motorcycle or tricycle whose frame structure is improved and a floor panel of sufficient length can be provided.

(Means for Solving the Problems) The means for solving the problems of the present invention includes a head pipe that supports a steering shaft of a front wheel, a down frame that branches downward from the head pipe, and a rear end of the down frame from the lower end of the down frame. comprising a main frame extending to the top, the down frame;
The front wheel (1) is characterized by being arranged in front of the rear end and outside the movement range of the front wheel.

(Function) By the above means, the down frame is placed forward of the rear end of the front wheels, so it is possible to place the lower part of the leg shield at a forward position close to the rear end of the front wheels, and it is possible to place the lower part of the leg shield at a forward position close to the rear end of the front wheels. A wide space can be created, and the degree of freedom in arranging floors, etc. is improved.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure shows a first embodiment, in which 1 is a frame body of a scooter type vehicle, 2 is a head pipe thereof, a pipe-shaped front down frame 3 is branched forward by welding from the bottom of the head pipe, and both sides Side down frames 4.4 are branched toward the side, and a substantially U-shaped main frame 5 is welded to the lower ends of these down frames 3.4.

These down frames 3.4 and main frames 5 are
As shown in FIG. 1(b), it is provided at a position outside the movement range of the front wheel 10 so as not to interfere with the steering of the front wheel 1o. The rear part of the main frame 5 extends upward to form a rear frame 6, and cross members 7, 7, . . . are fixed at appropriate positions on the main frame 5 formed in this way.

A steering shaft 8 having a front fork 8a at the bottom is supported on the head pipe 2, and a handle 9 and a front wheel 10 are provided above and below the steering shaft 8. A rear IL engine 12 and a seat 13 are attached to the rear frame 6.

On the front of the head pipe 2 and down frame 3.4,
Front force/<- by using appropriate brackets and fasteners
15 is attached, and a leg shield I6 is attached close to the rear surface to block the front part of the driver's legs. A curved portion lea is formed at the lower part of the leg shield 16, and the curved portion 16a is positioned such that a slight gap remains with the front wheel 1o when the front wheel IO rises, and a floor panel 17 is provided next to the curved portion lea. .

Since the leg shield 16 can be placed close to the front wheel IO in this way, the length F of the footrest 17 can be longer than that of conventional vehicles, and there is no protrusion in the center of the leg shield that surrounds the down frame. Therefore, the front and rear width of the floor panel 17 can be made wide.

Further, since the front part of the main frame 5 is U-shaped and located at the front part of the vehicle, it also acts as a protection member for the front part of the vehicle, and also serves as a protection member for the front and side down frames 3.4.
．． 4 is welded at three locations, resulting in a nearly truss structure with high rigidity.

It is also possible to attach the bracket 50 to the down frame 3 and use this down frame 3 for attaching the headlight H.

Next, a second embodiment will be explained with reference to FIGS. 2 and 3. In the frame main body 20 of this embodiment, only one front down frame 22 branches forward from a helad pipe 21 and is welded to a U-shaped main frame 23. A front cover 32 is attached. A steering shaft 24 is supported on the head pipe 21, and a front wheel 10 is attached via a fork 25 and a shock absorber 26 at the lower end of the steering shaft 24.

A top part 28 of a pyramid-shaped leg shield 27 made of a steel plate and having an open front is welded to the rear surface of the head pipe 21, and a lower end 29 of the leg shield 27 is connected to a U-shaped opening in a floor panel 30 made of steel. The footrest 30 is fixed to the main frame 28 by welding. The leg shield 27 has a generally flat rear wall 27a and left and right side walls 27b that are slightly rounded so as to enclose the loci of the fork 25 and the shock absorber 26, and have a generally trapezoidal cross section.

As described above, the leg shield 27 has its upper and lower ends welded to the head pipe 21 and the floor panel 30 made of steel plate.
1 and the main frame 23, and constitutes a reinforcing body for the down frame 22.

Also in this frame body 20, a down frame is not provided at the rear of the front wheel 10, and a leg shield 27 is provided close to the rear surface of the front wheel 10, so that the floor panel 3
0 can be formed long.

(Effects of the Invention) In the present invention, since the down frame is disposed in front of the rear end of the front wheels as described above, a wide space can be formed behind the head pipe, and the degree of freedom in arranging the floor etc. is improved.

[Brief explanation of the drawing]

FIG. 1 shows a first embodiment of the present invention; a) is a side view; (a) is a side view;
b) is a plan view of the front part of the frame, (C) is a front view, FIG. 2 is a side view of the second embodiment, and FIG. 3 is a slope view. 2.21...Head pipe 4. 22...Down frame 23...Main frame lO...Front wheel person Honda Motor Co., Ltd. person Kingai Kitamura 3 people

Claims (1)

[Claims] A head pipe that supports the steering shaft of the front wheels, a down frame that branches downward from the head pipe, and a main frame that extends rearward from the lower end of the down frame, and the down frame is arranged in front of the rear end of the front wheels. , a two-wheeled or three-wheeled vehicle characterized by being located outside the range of movement of the front wheels.