JPH0615800Y2 - Front two-wheel vehicle radiator mounting structure - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is intended for a front two-wheeled vehicle suitable for running on rough terrain, and specifically, has a structure similar to a general motorcycle. The present invention relates to a radiator mounting structure for a vehicle, which is provided with and front steering wheels on the left and right of the vehicle body.

(Prior Art) Japanese Utility Model Laid-Open No. 59-146219 discloses a front two-wheel vehicle in which a radiator of an engine is installed in front of a steering shaft for operating front wheels.

(Problems to be solved by the invention) However, the conventional structure described above has a disadvantage that the radiator is easily damaged when hitting an obstacle. Further, the distance from the engine body to the radiator becomes long, and since the frame and the steering shaft are located between them, it is difficult to install a pipe connecting the engine body and the radiator. In addition, the passage resistance of the above pipes may increase, and the cooling efficiency may decrease.

(Means for Solving the Problem) According to the present invention, a vertically extending steering shaft 7 is attached to a front portion of a vehicle body frame assembly 1 having an engine body 2 mounted thereon and provided on the left and right of the vehicle body frame assembly 1. In a front two-wheel vehicle in which the steering shaft 7 is connected to a pair of steering front wheels 9 via a connecting mechanism, and a bar handle is attached to an upper end portion of the steering shaft 7, both left and right sides of the body frame assembly 1 are provided. The pair of frame-shaped main frames 10 located on the upper part of the engine
Has an inclined part 10b going down from the front to the upper part 10 of the main frame.
c and the front and rear lower end portions 10d of the main frame upper portion 10c,
The vehicle body frame assembly 1 further includes a main frame lower portion 10f having a substantially linear shape connecting the main body 10e and an engine body 2 of the main frame upper portion 10c and the main frame lower portion 10f.
A sub-frame A is provided to connect more front portions, between left and right main frames 10, etc., and an engine radiator 17 is arranged behind the steering shaft 7 and in front of the engine body 2 at a substantially right angle to the front-rear direction. A front two-wheel vehicle characterized in that the upper and lower ends of the radiator 17 are elastically supported between the left and right main frames 10 along the inclined portions 10b and the subframe A via rubber mounts 21 and 31. It is a radiator mounting structure.

(Operation) According to the above structure, since the steering shaft plays a role of a protective member in front of the radiator, the possibility of damaging the radiator when hitting an obstacle is low. Further, since the radiator occupies a position close to the engine body and the pipe connecting them is shortened, the passage resistance of the pipe is reduced and the cooling efficiency is improved.

(Embodiment) In FIG. 1 which is a schematic left side view, an engine body 2 is attached to a central portion of a body frame assembly 1 made of a welded assembly of pipes through a plurality of brackets 3 (only one position is shown). . Bearing mechanisms 5 and 6 are attached to a front upper end and a front lower end of the frame assembly 1, and a steering shaft 7 is supported by the bearing mechanisms 5 and 6. The steering shaft 7 extends substantially vertically in the widthwise central portion of the vehicle body. The lower portion of the steering shaft 7 is connected to the left and right steering front wheels 9 via a link mechanism (not shown) such as a tie rod. A bar handle (not shown) is attached to the upper end of the steering shaft 7.

The frame assembly 1 includes frame-shaped main frames 10 (only one of which is shown) located on both sides of the vehicle body. Only the parts are shown). In addition, a front frame 13 that connects the main frame upper portion 10c and the main frame lower portion 10f of each main frame 10 is provided at the front portion of the frame assembly 1, and the intermediate portions of both front frame 13 also extend in the vehicle width direction. They are connected by an extending horizontal frame 14. Center part of the horizontal frame 14 (center part in the vehicle width direction)
The central portion of the horizontal frame 12 behind and below is connected by an intermediate frame 15, and the illustrated engine mounting bracket 3 is fixed to the intermediate frame 15.

The radiator 17 is installed rearward of the steering shaft 7 and forward of the engine body 2 in a posture in which the radiator 17 is slightly inclined forward, and the main frame upper portion 10c and the intermediate frame 15 are disposed.
It is installed as follows.

As shown in FIG. 2 which is an enlarged partial sectional view, a bracket 19 protruding upward is provided at the rear edge of the upper end portion of the radiator 17. A tubular portion 20 is provided on the bracket 19, and a tubular rubber mount 21 is fitted into the tubular portion 20.
The rubber mount 21 has outward flanges 22 and 23 at both ends. A cylindrical collar 25 having a screw hole 35 is inserted in the rubber mount 21. The collar 25 has an outward flange 26 at the front end, and the flange 26 is in contact with the front end surface of the flange 22. A bracket 27 is in contact with the rear end surface of the other flange 23. Bracket 2
Reference numeral 7 denotes a plate-like member welded to each main frame 10 (FIG. 1), and has a hole 36 through which the bolt 29 and the rear end of the tubular collar 25 are inserted. The bolt 29 is tightened in the screw hole 35 of the collar 25, and the head of the bolt 29 is seated on the bracket 27.

In FIG. 1, the lower edge of the radiator 17 is provided with a protrusion 30 projecting downward, and the protrusion 30 is a rubber mount 31.
Is inserted from above into the hole. The rubber mount 31 has a structure similar to that of the rubber mount 21 of FIG. 2, and includes a plate-shaped bracket 32 welded to the intermediate frame 15.
It is attached to.

(Effect of the Invention) According to the structure of the present invention described above, since the steering shaft 7 protects the radiator 17 when hitting an obstacle, the radiator 17 can be effectively prevented from being damaged. Further, the radiator 17 and the engine main body 2 are connected by a pipe (not shown) such as a hose, but since the radiator 17 is close to the engine main body 2, the length of the pipe becomes short. Moreover, the steering shaft 7 is not located between them. Therefore, the piping can be easily installed, and the passage resistance can be reduced to improve the cooling efficiency. Also, the weight of the pipe can be reduced.

The radiator 1 is made of a highly rigid member such as the main frame 10.
Since the upper end of 7 is supported via the rubber mount 21 (damper), the radiator 17 is stably supported. Further, since the load of the radiator 17 can be applied to the durable main frame 10, a supporting structure can be adopted in which the protrusion 30 protruding downward from the lower end of the radiator 17 is inserted into the hole of the rubber mount 31, and the assembling becomes easy. The member for supporting the radiator 17 can also be used as the inclined portion 10b of the main frame 10 and the sub-frame A such as the intermediate frame 15, so that the structure is simple and inexpensive. Since the upper end portion of the radiator 17 is supported in the middle of the front descending inclined portion 10b of the main frame upper portion 10c, the radiator 17 with respect to the engine body 2 is
The upper and lower positions of can be set to an optimum level, and the front portion of the upper portion 10c of the main frame can be lowered to widen the field of view immediately in front of the vehicle body.

[Brief description of drawings]

FIG. 1 is a schematic left side view of the embodiment, and FIG. 2 is an enlarged partial sectional view of FIG. 1 ... Body frame assembly, 2 ... Engine body, 7 ... Steering shaft, 9 ... Steering front wheel, 17 ... Radiator

Claims (1)

[Scope of utility model registration request] 1. A steering shaft 7 extending vertically,
1 mounted on the front of the vehicle body frame assembly 1 equipped with the engine body 2 and provided on the left and right of the vehicle body frame assembly 1
In a front two-wheel vehicle in which the steering shaft 7 is connected to the pair of steering front wheels 9 via a connecting mechanism, and a bar handle is attached to the upper end of the steering shaft 7,
A pair of frame-shaped main frames 10 located on both left and right sides of the vehicle body frame assembly 1 are provided above the engine body 2.
It has a sloped part 10b that goes down from a, and the upper part of the main frame 1
0c and the front and rear lower end portions 10 of the main frame upper portion 10c.
and a substantially lower main frame lower portion 10f connecting the main frame upper portion 10c and the main frame lower portion 10f between the front portion of the main body upper portion 10c and the main body lower portion 10f and the left and right main frames. The radiator 1 of the engine is equipped with a sub-frame A that connects between 10 and the like.
7 are arranged behind the steering shaft 7 and in front of the engine body 2 at substantially right angles to the front-rear direction, and the upper and lower ends of the radiator 17 are located in the middle of the inclined portions 10b of the left and right main frames 10 and the sub-portion. A radiator mounting structure for a front two-wheel vehicle, which is elastically supported on the frame A via rubber mounts 21 and 31.