JP2889290B2 - Motorcycle engine cooling system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle engine cooling device that cools an engine with water-cooled water.

[Conventional technology]

Some motorcycles include an engine cooling device that cools an engine with water-cooled water.

This engine cooling device circulates water in the engine water jacket to cool it, guides the cooling water heated by this cooling to the radiator, cools it with the wind from traveling or the wind of a cooling fan, etc. I put it back on my jacket. Further, some radiators include a recovery tank, in which excess cooling water is stored in the recovery tank, and when the amount of cooling water decreases, the radiator is replenished.

[Problems to be solved by the invention]

The cap of the radiator and the cap of the recovery tank may be stolen or mischievous, such as removing the cap and mixing foreign matter therein. Since the recovery tank has a degree of freedom in arrangement position because it is relatively small,
It can be arranged at a position where no mischief can be made from the outside.

By the way, in a motorcycle, the radiator is supported by the body frame at a position behind the front fork where the traveling wind is easy to hit, and since the radiator is removed with a cap to supply cooling water, the radiator cap is usually easily fitted to a person. It is located within easy reach. For this reason, the cap of the radiator is liable to be mischievous, such as being stolen or the cap being removed to intentionally mix foreign matter into the radiator.

Therefore, the radiator cap is fixed to the inlet with a screw or the like, or the cap is covered with a special cap cover to take measures against theft and mischief. But,
These require separate members such as screws and cap covers, which complicate the structure and increase the cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has an engine cooling device for a motorcycle that can reliably prevent theft and mischief of a cap with a simple structure that does not use a dedicated member by using a recovery tank. It is intended to provide.

[Means for solving the problem]

In order to solve the above-mentioned problem, the present invention includes a radiator for cooling an engine mounted on a vehicle body frame, the radiator being supported by the vehicle body frame in a forwardly inclined posture in which an upper part is inclined forward and connected to the radiator. In a motorcycle engine cooling device in which a recovery tank is mounted on the vehicle body frame, the lower portion of the recovery tank is inclined so that the front is obliquely downward, and the lower front portion of the recovery tank is connected to a radiator via a pipe. The lower part of the recovery tank near the pipe is attached with bolts from the vehicle width direction, and the recovery tank can be tilted forward with this bolt as a fulcrum, and the left and right ends of the radiator project outward from the main frame of the body frame. And an inlet is provided on the upper surface of one protruding portion of the radiator, To regulate the inlet cap detachable opening and closing, it is characterized in that a rear lower portion of the recovery tank immediately above the cap.

[Action]

In the present invention, the inlet is provided on the upper surface of the radiator, and the lower rear portion of the recovery tank is disposed directly above the cap so as to regulate the attachment and detachment of the cap for opening and closing the inlet. Therefore, the radiator cap cannot be removed from the outside unless the recovery tank is removed. In this way, by using the recovery tank, the cap can be reliably prevented from being stolen or mischievous with a simple structure that does not use a dedicated member.

Also, when removing the radiator cap, the recovery tank must be removed, so even if the recovery tank is placed higher in the radiator, the recovery tank must be lowered when removing the radiator cap. The cooling water does not flow from the recovery tank to the radiator, so that the cooling water can be prevented from overflowing from the radiator.

Further, by bringing the recovery tank as close as possible to the radiator, the piping is shortened and the structure is simplified.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of a motorcycle to which the present invention is applied, FIG. 2 is a side view of a radiator mounting portion, FIG. 3 is a front view of a radiator mounting portion, FIG. 4 is a plan view of a radiator mounting portion,
FIG. 5 is a sectional view of a cap of the recovery tank.

In the drawing, reference numeral 1 denotes a body frame of a motorcycle. A front fork 3 is provided on a head pipe 2 constituting the body frame 1 so as to be pivotable, and a front wheel 4 is provided below the front fork 3. Head pipe 2
A pair of left and right main frames 5 extend rearward from the rear, and a pair of left and right subframes 6 extend diagonally downward and rearward.
The rear end of the main frame 5 and the rear end of the subframe 6 are connected via a rear arm bracket 7. An engine 8 is mounted on the body frame 1 composed of the main frame 5, the sub-frame 6, and the rear arm bracket 7.

A rear arm 9 is pivotally supported by the rear arm bracket 7, and the rear arm 9 is swingably supported by a seat rail 11 connected to the main frame 5 via a rear cushion 10, and a rear wheel 12 is provided at a rear end of the rear arm 9. Is provided. A fuel tank 13 is arranged on the main frame 5, a seat 14 is provided behind the fuel tank 13, and a rear cowl 15 is covered behind the seat rail 11.

Further, both sides of the engine 8 from the front side of the front fork 3 are covered with a front cowl 16, and a radiator 17 is attached to a pair of left and right subframes 6 behind the front fork 3. That is, as shown in FIG. 2, brackets 20 and 21 are provided on the upper and lower sides of the rear side of the pair of left and right subframes 6, and the radiators are attached to the brackets 20 and 21.
17 is attached via bolts 22 and 23, and the center of the radiator 17 in the vertical direction is a bracket of the subframe 6.
Received at 24. Accordingly, the radiator 17 is supported by the sub-frame 6 of the vehicle body frame 1 in a forwardly inclined posture in which an upper portion is inclined forward and a lower portion is located rearward from a front portion.

The rear surface of the upper part 17a of the radiator 17 is connected to a cylinder 26 of the engine 8 via a pipe 25, and the lower end face of the lower part 17b is connected to a pipe 27.
Water pump provided on the side of engine 8 via
The cooling water is circulated through a water jacket (not shown) provided in the engine 8 for cooling.

For this reason, cooling water heated by the cooling of the engine 8 is guided to the radiator 17 via the pipe 25, cooled by the wind caused by the running, and then again cooled via the pipe 27.
By the operation of 28, the engine 8 is cooled by returning to the water jacket of the engine 8.

An inlet for injecting cooling water is provided on the upper surface of the radiator 17.
29 is provided and the inlet 29 is closed with a cap 30. As shown in FIG. 4, the left and right ends of the radiator 17 project outward from the main frame 5 (the left end of the radiator 17 projects to the left of the left main frame 5, and the right end of the radiator 17 projects to the right of the main frame 5). The injection port 31c is disposed on the upper surface of one of the radiators 17 (the right side in FIG. 4). Cap 30 provided on this radiator 17
A recovery tank 31 is disposed at a position right above and just above the main frame 5 and projects rightward from the main frame 5.
The lower portion 31a has a rear portion inclined obliquely upward, and a lower front portion inclined downward of the recovery tank 31 is connected to the vicinity of the inlet 29 of the radiator 17 via a pipe 32. Excess cooling water is stored in the recovery tank 31, and is supplied to the radiator 17 when the cooling water decreases.

Further, the steam can be turned into water in the recovery tank 31 and, when cooled, can be returned to the radiator 17 via the pipe 32. The piping 32 connecting the recovery tank 31 and the radiator 17 is shortened by bringing the recovery tank 31 close to the cap 30 of the radiator 17, and the piping structure becomes extremely simple.

Also, the recovery tank 31 regulates the attachment and detachment of the cap 30 that opens and closes the inlet 31c provided in the radiator 17,
The rear lower part 31a of the recovery tank 31 is located directly above the cap 30, and the recovery tank 31 covers the upper part of the cap 30, so that the cap 30 of the radiator 17 cannot be removed from the outside and cannot be tampered with. I have.

The recovery tank 31 has a protrusion 3 in front of its bottom 31a.
1b is attached to the bracket 33 of the sub-frame 6 with bolts 34, and the upper protrusion 31d behind the recovery tank 31 is provided between the main frame 5 and the sub-frame 6 and attached to the bracket 35 with bolts 37 via the stays 36. Have been.
Further, a breather hose 38 is attached to an inlet 31c of the recovery tank 31, and the breather hose 38 is attached to a front side of the sub-frame 6 with a stop member 39 to discharge overflowing cooling water to the outside. .

The injection port 31c of the recovery tank 31 is provided with a cap 40. As shown in FIG. 5, the cap 40 has a holding member 41 having a rib 41a and a screw 42 for the recovery tank 31.
Is attached to the upper surface of the
We prevent 40 thefts.

In addition, when cooling water is injected into the radiator 17, the recovery tank 31 is removed and placed at a position lower than the radiator 17, and the cap 30 is removed in this state.
The cooling water of 31 is supplied to the radiator 17 and can be prevented from overflowing.

Further, the upper bolt 37 used for mounting the recovery tank 31 is removed, and the lower bolt 34 is loosened.
When the 31 is tilted forward, the recovery tank 31 moves to a position below the cap 30 and the radiator 17 is opened above the cap 30. Therefore, the cooling water can be injected into the radiator 17 without removing the recovery tank 31 entirely, and the handling is easy.

〔The invention's effect〕

(1) In the present invention, the rear lower part of the recovery tank is disposed directly above the cap so as to regulate the attachment and detachment of the cap for opening and closing the radiator inlet. By using the recovery tank, which cannot be removed from the radiator, it is possible to reliably prevent the radiator cap from being stolen or a foreign object from being inserted into the radiator with a simple structure using no dedicated member.

Also, when removing the radiator cap, by removing the recovery tank and setting the recovery tank at a position lower than the radiator cap, it is possible to prevent the cooling water from overflowing from the radiator even if the cap is removed.
Further, by bringing the recovery tank as close as possible to the radiator, the piping is shortened and the piping structure is simplified.

(2) In the present invention, the lower portion of the recovery tank is inclined so that the front is obliquely downward, and the lower portion on the front side of the recovery tank is connected to the radiator via a pipe. Therefore, when the cooling water of the radiator decreases during traveling, the cooling water of the recovery tank flows to the radiator according to gravity, and this flow is continued until the cooling water in the recovery tank completely runs out.

(3) In the present invention, the front lower part of the recovery tank is connected to a radiator by piping, and the lower part of the recovery tank near the piping is attached to the vehicle body frame from the vehicle width direction by bolts, and the recovery tank is provided with the bolts as fulcrums. Can be tilted forward. As described above, since the pipe is located near the fulcrum of the recovery tank, the pipe does not come off when the recovery tank is tilted forward even if the length of the pipe is shortened.

(4) In the present invention, both left and right end portions of the radiator are made to protrude outside the main frame of the vehicle body frame,
An inlet was provided on the upper surface of one protruding portion of the radiator. Therefore, the recovery tank and the radiator cap are located at the outermost positions of the motorcycle, and it is easy to remove the recovery tank or remove the radiator cap to inject cooling water.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a motorcycle to which the present invention is applied, and FIG.
FIG. 3 is a side view of the radiator mounting portion, FIG. 3 is a front view of the radiator mounting portion, FIG. 4 is a plan view of the radiator mounting portion, and FIG. 5 is a sectional view of a cap of the recovery tank. In the figure, reference numeral 1 denotes a body frame, 5 denotes a main frame, 6 denotes a subframe, 8 denotes an engine, 17 denotes a radiator, 29 denotes an inlet, 30 denotes a cap, 31 denotes a recovery tank, 31a denotes a lower portion of the recovery tank, and 31c denotes a note. The inlet, 32 is a pipe, and 34 is a bolt.

Claims (1)

(57) [Claims] A radiator for cooling an engine mounted on the vehicle body frame, wherein the radiator is supported by the vehicle body frame in a forwardly inclined posture in which an upper part is inclined forward, and a recovery tank connected to the radiator is provided in the vehicle body frame. In the motorcycle engine cooling system attached to the motorcycle, the lower part of the recovery tank is inclined so that the front is obliquely downward, and the lower front part of the recovery tank is connected to a radiator via a pipe, and the recovery tank near the pipe is connected to the radiator. Attach the lower part with bolts from the vehicle width direction,
Using the bolt as a fulcrum, the recovery tank can be tilted forward, the left and right ends of the radiator project outside the main frame of the vehicle body frame, and an injection port is provided on an upper surface of one projecting portion of the radiator. A motorcycle engine cooling device, characterized in that a rear lower portion of a recovery tank is disposed directly above the cap so as to regulate attachment and detachment of the cap for opening and closing the inlet.