JPS6010191Y2 - A vehicle with an engine that steers with one front wheel - Google Patents

Description

[Detailed description of the invention] This invention is designed for motorcycles or tricycles that use an engine as a driving source, especially for driving on rough terrain with one front wheel equipped with an ultra-low pressure tire called a balloon tire. This article relates to vehicles with engines that are heading towards the world.

This type of vehicle has a low vehicle height to improve steering stability.

Therefore, the position of the engine is lower, and if a heat exchanger such as an oil cooler or radiator for a water-cooled engine is installed near the engine, the running air will be blocked by the wide front wheels, front fender, front fork, etc. The cooling effect is poor.

Therefore, it is possible to install a heat exchanger by extending it to the side of the fuel tank located between the front fork and the seat, but because the vehicle height has been lowered, the side of the fuel tank is located just above the knee grip. This causes problems with the stability of steering as it gets in the way of the knees.

It is also known that a radiator is placed above the front wheel, in front of the left and right front fork pipes, and is supported by arms that protrude forward from the head pipe, but when the steering wheel is operated, the front fork pipes It is necessary to take measures such as bending the middle of the left and right support arms inward to prevent them from hitting the support arms.

Furthermore, since the radiator protrudes in front of the front fork, it is easy for other objects to hit the radiator.

In view of the above points, the present invention was developed by installing a balloon tire, that is, an ultra-low pressure tire wheel, on the top of the front fork, which has a wide gap between the left and right fork pipes, and a rear steering head pipe. We focused on the fact that there was a recess surrounded by a pair of frontward-opening C-shaped bridges arranged above and below, and used the inside of the recess as a position for mounting a heat exchanger.

That is, as shown in the drawing, a pair of F-shaped bridges 5 that open toward the front are disposed above and below the head pipe 3 at the front end of the vehicle body frame 2 above the steering front wheels 1;
6, a pair of left and right front fork pipes 4R, which are vertically inserted and supported at both ends of the upper and lower C-shaped bridges 5 and 6.
A heat exchanger 7 such as a radiator or an oil cooler is placed in a recess S surrounded by 4L, and the heat exchanger 7 is connected to the head pipe 3 or It is characterized by a structure in which it is fixed to a position near the head pipe of the vehicle body frame 2, that is, to the front end of the vehicle body frame.

A headlamp 10 and a steering handle 11 are mounted on the upper bridge 5.

12 is a rear wheel, 13 is a front wheel fender, and 14 is a rear wheel fender.

As mentioned above, in the vehicle with an engine that is steered by one front wheel of the present invention, the heat exchanger 7 attached to the engine is placed above the front wheel 1, so that the heat exchanger 7 is well exposed to air while driving, resulting in cooling efficiency. Heat exchanger 7
There is no risk of it getting dirty.

Furthermore, since the heat exchanger 7 is fixed to the front end of the vehicle body frame 2 by the support arms 8R and 8L, even if the handle 11 is turned for steering, the heat exchanger 7 and the hose 1 connected to it cannot be moved.
．． 16 does not move, and even if the heat exchanger 7, which is relatively heavy, is installed at a higher position than the front wheel 1, there is no burden on the steering operation of the handle 11.

Furthermore, the present invention arranges and attaches the heat exchanger 7 above the front wheel 1, and in particular, includes a pair of forward-opening F-shaped bridges 5 and 6 disposed above and below the head pipe 3, and Since the heat exchanger 7 is arranged in the recess S surrounded by the left and right pair of front fork pipes 4R and 4L supported at both ends of the F-shaped bridges 5 and 6, the heat exchanger 7 does not protrude in front of the front fork 4. F-shaped bridges 5, 6, front fork pipe 4R,
4L, and is protected by the head pipe 3, so there is no risk of other objects hitting the heat exchanger 7.

Furthermore, even if the front fork pipes 4R and 4L rotate around the head pipe 3 for steering, the heat exchanger 7 is located inside the rotation locus circle of the front fork pipes 4R and 4L. There is no risk of interference between the heat exchanger 7 and the front fork pipes 4R, 4L, and the heat exchanger 7
This improves the durability of the hoses 15, 16, etc. attached thereto, and is effective as a structure for installing a heat exchanger on an engine-equipped vehicle that is steered by one front wheel.

[Brief explanation of drawings]

FIG. 1 is a front view of the vehicle of the present invention, FIG. 2 is an enlarged cross-sectional view of the heat exchanger mounting portion, and FIG. 3 is an enlarged longitudinal sectional side view of the heat exchanger mounting portion. 1 is the front wheel, 2 is the body frame, 3 is the head pipe, 4 is the front fork, 4R, 4L are the front fork pipes, 5 is the upper bridge, 6 is the lower bridge, 7 is the heat exchanger, 8R, 8L are the support arms, 9 is the bolt, 12 is the rear wheel, 1
3 is the front fender.

Claims (1)

[Scope of utility model registration request] Above the front wheel, there is a concave area surrounded by a pair of forward-opening V-shaped bridges placed above and below the head pipe, and a pair of left and right front fork pipes supported by both ends of the V-shaped bridges above and below. A vehicle with an engine is equipped with a heat exchanger attached to the engine, and the heat exchanger is steered by one front wheel that is fixed to the front end of the vehicle body frame using a support arm.