JPH0219335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a radiator device for a two-wheeled motor vehicle, which is disposed at the front part of the vehicle body behind the front wheels.

(Prior art) Motorcycles equipped with a water-cooled engine must be equipped with a radiator to cool the hot engine cooling water, and it is generally installed at the front of the vehicle body in a manner that can easily receive wind from the vehicle. .

There are various mounting methods, but in order to mount the radiator almost upright, the radiator is divided into a pair of left and right radiator units, and these are attached to the front end of the tank rail that extends rearward from the head pipe and the down tube that hangs downward from the rear. Some radiators are configured as a single radiator by arranging the radiator and the upper part so as to protrude to both sides.

In this case, since both radiator units are vertically elongated and support the upper and lower parts, they are susceptible to distortion from the vehicle body side, which tends to reduce durability. For this reason, they are attached via cushion rubber, but both radiator units are each supported in the form of a cantilever beam, and the holding force against back and forth rocking around the support part tends to be weak, so the cushioning properties are not sufficient. difficult to fully determine. Also, since the tank rail and downtube have different vibration modes, complex vibrations are distributed inside the radiator due to the different vibration modes from above and below, causing unpredictable damage and reducing durability. There is a problem with doing so.

(Problems to be Solved by the Invention) In view of these problems, the present invention proposes a structure in which the left and right radiator units are combined into a single radiator, with elastic support that is less susceptible to vibrations and distortions from the vehicle body side. It is an object of the present invention to provide a radiator device for a two-wheeled motor vehicle, which can maintain an attached posture.

[Structure of the invention]

(Means for solving the problem) In order to achieve the above object, automatic 2 of this invention
A radiator device for a wheeled vehicle is a two-wheeled vehicle equipped with a water-cooled engine and a radiator attached to the front of the vehicle body behind the front wheels.The frame at the front upper part of the vehicle body has a head pipe and a tank extending rearward from the head pipe. It is formed by a down tube that hangs backward and downward from the rail and head pipe, and branches into two left and right sections in the middle, and the radiator is vertically divided into left and right units that are arranged almost upright with the tank rail and down tube in between. Each of the radiator units has a bracket piece that projects forward from the front edge of the upper inner end, a bracket piece that projects rearward from the rear edge of the upper inner end, and a bracket piece that projects downward toward the inner side of the center of the lower end surface. The upper two bracket pieces are attached to the front part of the tank rail through relatively hard elastic cushion rubber, and the lower bracket piece is attached to the left and right branches through relatively soft elastic cushion rubber. It is configured to be attached to the upper end of the down tube.

(Function) With this configuration, the left and right radiator units are supported at three points, two points at the top and one point at the bottom, when viewed from the side, and although they are cantilevered, they are supported at the top with a width in the right angle direction. In the lower part, the down tube was supported closer to the center of the lower surface by taking advantage of its increased width due to its left and right branches, so the cantilever structure was relaxed and the holding force against back and forth swinging was sufficiently ensured.

Therefore, it is easy to use cushion rubber that can absorb vibrations and distortions on the vehicle body side.In particular, the lower cushion rubber is set to be relatively soft, so it can sufficiently absorb vibrations from the down tube, and the upper and lower parts of the radiator This eliminates concerns that different vibration modes may interfere with each other and reduce durability.

(Example) Hereinafter, drawings that are examples of the present invention will be described.

In Figures 1 and 2, the reference numeral 1 indicates the head pipe of the motorcycle frame, from which one tank rail 2 extends rearward and one down tube 3 extends rearward and downward. . Down tube 3 has two down tubes 3a on the left and right,
Branches to 3b.

The radiator is constructed into one by combining left and right divided radiator units 4, 4, and is mounted almost vertically to the front end of the tank rail 2 and with the down tube 3 in between.

At the inner upper end of both radiator units 4, 4,
Bracket piece 13a protruding forward from the front edge
and a bracket piece 13 protruding rearward from the rear edge.
b is welded and provided, and a bracket piece 14 that projects downward is welded to the inner side of the center of the lower end surface.

These upper bracket pieces 13a and 13b are attached to the front and rear mounting brackets 1 provided on the front edge of the tank rail 2.
Relatively hard cushion rubber 5a for 1a and 11b
The lower bracket piece 14 is elastically supported through the
The down tube 3a is elastically supported by a mounting bracket 12 provided at the upper end of the branched down tube 3a via a relatively soft cushion rubber 5b, and the entire structure is elastically suspended and mounted.

As shown in FIG. 3, the cushion rubber 5a is
It connects side plates 9 and 10 with screws 7 and 8 protruding from both sides. After tightening screw 7 to mounting bracket 11a, screw 8 is inserted into bracket piece 13a and tightened with nut 15. Make it. In this case, the protrusion 16 protruding to the outside of the side plate prevents co-rotation between the bracket piece 13a and the bracket piece 13a. The cushion rubber 5b is similarly constructed.

In this way, the radiator units 4, 4 are elastically supported at three points by the bracket pieces 13a, 13b and 14 when viewed from the side.

The upper part provides support that is wide in the front-rear direction, and the lower part supports the center of the lower surface, so the holding force against rocking displacement in the front-rear direction around the inner edge is high, and the installation is stable.

The upper cushion rubbers 5a, 5a are relatively hard;
Since the lower cushion rubber is relatively soft, it can be effectively used for different vibration modes of the tank rail 2 and down tube 3a.

〔Effect of the invention〕

As described above, the radiator device for a two-wheeled motor vehicle according to the present invention is applicable to a two-wheeled motor vehicle equipped with a water-cooled engine and having a radiator attached to the front part of the vehicle body behind the front wheels. , one tank rail extending rearward from the head pipe, hanging downward from the head pipe,
It is formed by a down tube that branches into two left and right parts in the middle, and the radiator is vertically divided into left and right units, which are arranged almost upright with the tank rail and down tube in between. , a bracket piece protruding forward from the front edge of the inner upper end, a bracket piece protruding backward from the rear edge of the inner upper end, and a bracket piece protruding downward toward the inner side of the center of the lower end surface are welded, and the upper two bracket pieces are compared. The bottom bracket piece was attached to the front part of the tank rail through hard elastic cushion rubber, and the lower bracket piece was attached to the upper ends of the branched left and right down tubes through relatively soft elastic cushion rubber. This provides elastic support that is less susceptible to vibrations and distortions from the vehicle body, and also maintains a stable mounting position, which has the effect of improving the durability of the radiator.

[Brief explanation of drawings]

FIG. 1 is a side view of a radiator device according to an embodiment of the present invention, FIG. 2 is a front view taken along the line AA in FIG. 1, and FIG. 3 is a sectional view illustrating cushion rubber. 1... Head pipe, 2... Tank rail,
3, 3a...Down tube, 4...Radiator unit, 5a, 5b...Cushion rubber, 11
a, 11b, 12...Mounting bracket, 13a,
13b, 14...Bracket piece, 15...Tightening nut.

Claims (1)

[Claims] 1 In a motorcycle equipped with a water-cooled engine and a radiator attached to the front of the vehicle behind the front wheels, the frame at the top of the front of the vehicle has a head pipe and
The radiator consists of a single tank rail that extends rearward from the head pipe, and a down tube that hangs downward from the head pipe and branches into two parts, left and right. Both radiator units are arranged almost upright with each other sandwiched between them, and each of the two radiator units has a bracket piece projecting forward from the front edge of the inner upper end, a bracket piece projecting rearward from the rear edge of the inner upper end, and a lower end surface center inner side. A bracket piece protruding downward is welded to the side, and the upper two bracket pieces are attached to the front part of the tank rail via relatively hard elastic rubber.
A radiator device for a two-wheeled motor vehicle, characterized in that one lower bracket piece is attached to the upper ends of the left and right down tubes that are branched via relatively soft elastic cushion rubber.