JPS6147752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for an engine cooling water pump in a motorcycle.

In motorcycles, engine cooling water pumps are installed with the pump itself and the suction and discharge pipes connected to it exposed on the side of the engine, so care must be taken to prevent them from interfering with other objects. However, it is an object of the present invention to provide a water pump mounting device for a motorcycle that satisfies such requirements. .

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

In Fig. 1, a V-type multi-cylinder engine E is mounted horizontally on a double cradle type body frame F of a motorcycle (with its crankshaft 4 perpendicular to the longitudinal direction of the body frame F). The main body of the E consists of two engine blocks 1 and 2 arranged in a V-shape with respect to the direction of movement of the motorcycle, and a power unit that is connected to the lower part of these blocks and integrates a crank case and a transmission case. Case 3.

At the front of one side of the power unit case 3, a generator 5 driven by a crankshaft 4 is disposed. In addition, a recess 6 on one side of the power unit case 3 that is recessed inwardly behind the generator 5
is formed on one side of the power unit case 3 below the back of the generator 5 in the recess 6.
A water pump 7 driven by the crankshaft 4 is provided. A suction pipe 8 and a discharge pipe 9 are connected to the suction port and discharge port of the water pump 7, respectively. After the suction pipe 8 wraps around the outer circumference of the lower surface of the generator 5, it extends forward along the down tube of the vehicle body frame F. The discharge pipe 9 also extends around the outer periphery of the lower surface of the generator 5, and its open end communicates with the outlet of the radiator 10 provided in the down tube.
It communicates with the inlet of the cooling water passage formed in. Further, the outlet of the cooling water passage in the engine blocks 1, 2 and the inlet of the radiator 10 are communicated with each other by a water guide pipe 11, which is also placed along the down tube of the vehicle body frame F.

When the water pump 7 is driven by the operation of the engine E, the water pump 7 forcibly circulates the cooling water through the cooling water passages in the engine blocks 1 and 2 and the inside of the radiator 10, and returns the cooling water to the engine block as usual. 1 and 2 can be cooled.

The transmission housed in the power unit case 3 consists of a main shaft 12 that is interlocked with the crankshaft 4, a countershaft 13, and a group of speed change gears that interlock the shafts 12 and 13. The output end of the countershaft 13 is projected outside from the power unit case 3 and connected to the rear wheel Wr via bevel gears 14 and 15.
The rotation of the countershaft 13 is transmitted to the rear wheel Wr. The bevel gears 14 and 15 are incorporated in a bevel gear box 17.
7 is fixed to the rear of the outer surface of the power unit case 3.

As described above, according to the present invention, on one side of the power unit case 3, which is formed integrally with the crank case and the transmission case of the engine E mounted on the vehicle body frame, the generator 5 and the lower back surface thereof are provided with water. suction and discharge pipes 8, each equipped with a pump 7 and connected to said water pump 7;
Since the water pump 9 is extended along the outer peripheral surface of the generator 5 and connected to the cooling water channel of the engine E, the front of the water pump 7 is protected by the generator 5 and connected to the water pump 7. The suction and discharge pipes 8 and 9 are also protected by the generator 5,
Interference with other objects can be avoided, and deformation and damage thereof can be prevented.

Furthermore, since the water pump 7 and its suction and discharge pipes 8 and 9 are arranged using the dead space on one side of the power unit case 3, they do not impose restrictions on the layout or installation of other equipment. Furthermore, by arranging the suction and discharge pipes 8 and 9 along the outer peripheral surface of the generator 5, piping thereof becomes easy.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the device of the present invention.
FIG. 1 is a side view thereof, and FIG. 2 is a partially cutaway enlarged plan view of the engine. E... V-type multi-cylinder engine, F... Body frame, 3... Power unit case, 5... Generator, 7... Water pump, 8... Suction pipe, 9...
discharge pipe.

Claims (1)

[Claims] 1. A generator 5 is disposed on one side of a power unit case 3 which is integrally formed with a crank case and a transmission case of an engine E mounted on a vehicle body frame F, and a water pump 7 is disposed below the back of the power unit case 3. A water pump in a motorcycle in which suction and discharge pipes 8 and 9 connected to the water pump 7 are extended so as to wrap around the outer peripheral surface of the generator 5 and connected to a cooling water channel of the engine E. Mounting device.