JPS59105918A - Mounting structure of cooling fan unit in motorcycle - Google Patents

Abstract

PURPOSE:To contrive to improve the external appearance and function of a radiator by a structure wherein cooling fan units, the rear part of each of which is located upwards so as to incline to the radiator, is arranged in a space above the cylinder heat covers of front cylinders. CONSTITUTION:The effective utilization of a dead space above the front cylinder 32 and 32 of a horizontal V-engine, which has not been used conventionally, is realized by arranging cooling fan units 53 and 53, the rear part of each of which is inclined upwards inrespect to the face of an upper radiator 51, in the space above the cylinder head covers of front cylinders 32 and 32 in the rear of the upper radiator 51. Furthermore, the favorable external appearance is obtained because the cooling fan units are kept from sight with a left and a right down tubes 12 and 12. In addition, since the directions of rotation of fans 55 and 55 are set so as to move downward at their inner ends, the air tending to stagnate in the upper part of an engine 25 is efficiently removed outwards, resulting in enabling to efficiently cool the engine 25.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for a cooling fan unit in a motorcycle.

Considering the cooling performance of the radiator, etc., it is preferable to attach the radiator to the motorcycle or tricycle at the front part of the down tube that constitutes the vehicle body frame.

On the other hand, a cooling fan unit such as a fan loudspeaker, fan, fan morph, etc. is installed at the rear of the radiator, so when installing the radiator in the front part of the down/tube, it is necessary to In the case of a vertically installed engine cylinder or a horizontally opposed engine, each having a cylinder, a cooling fan unit can be installed above the engine. If the displacement is particularly large, the front cylinder faces the rear of the radiator, so the cooling fan unit can be placed behind the radiator, or the cooling fan unit' can be placed from the side of the front cylinder. Otherwise, the radiator must be disposed at an appropriate location other than the front portion of the downtube, which causes various inconveniences in terms of appearance and functionality of the radiator.

The present invention was devised to solve the above-mentioned problems.
An object of the present invention is to effectively utilize the denodus wave above the ring head force bar of the front cylinder, and to install a cooling fan unit behind the lanoator installed in front of the down tube.

In order to achieve the above-mentioned object, the present invention is characterized in that a cooling fan unit is disposed in a space above the cylinder bed cover of the front cylinder, with its rear part facing upward and being inclined with respect to the ranoator.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a left side view of the motorcycle, and FIG. 2 shows a plan view of the engine portion.

A head tube 3 is provided at the front end of the body frame 2 of the motorcycle 10. The head tube 3 supports the upper part of a front fork 5 that supports four front wheels in a freely steerable manner. Equipped with 7.

The vehicle body frame consists of a pair on the left and right, and includes a main guide 11 extending from the rear upper part of the head tube 3 to the rear side, and a down tube 12 hanging down from the rear lower part of the head tube 3 to the rear lower side of the head tube 3. , a center tube 14 that extends rearward from the lower end of the down tube 12 and a down tube lower 13 , and a center tube 14 that extends forward and upward from the rear end of the down tube lower 13 and connects to the rear end of the main tube 11 .
, main gib 11 extended to rear force/-trail 1
5. No. 1 - Consists of a shaft 16 that connects the rail 15 and the lower part of the center tube 14.

These left and right frame members are square pipes having a vertically long rectangular cross section mj obtained by press-forming steel plates, and are connected to each other by a cross member.

The main/inner 011 that constitutes the above body frame 2
A notebook 22 is placed on the notebook rail 15, and a notebook 22 is mounted on the notebook rail 15, and is pivotally extended rearward from the lower part of the center tube 14 and connected to the rear wheel 24 via a fork 23.
, and an intermediate part between the rear fork 23 and the note rail 15 is interposed.

An engine 25 is mounted in the space surrounded by the main pipe f11, the down tube 12, the down tube lower 13, and the center tube 14, and the engine is a 4-cylinder ennon having a transverse V-shape with two cylinders in the front and the rear.

The engine cylinder 25 includes a crankcase 31 which also serves as a housing, and a cylinder head 36, which is raised front and back from two parts of the crankcase 31 and constitutes front cylinders 32, 32, rear cylinders 33, 33, cylinder heads 36, 34, 35, cylinder heads 36, 32, 32, rear cylinders 33, 33, cylinders 32, 32, rear cylinders 33, 33, cylinders 34, 35, cylinder heads 36.
37, head cover 38゜39, etc., main / e
An air cleaner is installed below the front of the Eve 11, and a carburetor 41 is installed inside the bank space.A water pump 42 is installed at the rear of the left side of the crankcase 31, and the left and right exhaust pipes 43 are each extended rearward.

An upper lano-ac 51 is disposed approximately vertically in the front near the upper part of the down tube 12, a lower lano-eater 52 is disposed at the front of the lower part, and two cooling fan units are installed above the rear of the upper lano-eater 51. 53.53 is installed.

The cooling fans 22) 53 and 53 are the fans 7 and 54 attached to the rear surface of the two-part horn eater 51, respectively, as shown in FIG. 3 in a rear view and in FIG. 4 in a partially sectional side view.
and a cooling fan 5 disposed within the fan shroud 54.
5, and a fan motor 56 that protrudes from the rear surface of the fan/niroud 54 and rotates the cooling fan 55, and as shown in FIG. The cylinder head force bar 38 is installed at an angle so that it faces upward, and, as shown in FIG. ing.

The cooling fans 55, 55 are formed to rotate from above to below at their inner ends, as shown by the arrow (a) in FIG.
．． The upper lanoator 51 is cooled by the rotation of the cooling fan 55, and as shown in FIG. The air is removed to the outside of the vehicle body frame 2 (i11 direction), and is efficiently cooled by the air blown air 57.57.

Water is supplied to the two-part lanoerator 51 from the upper left end.
] 61 is installed, and a connecting pipe 62 is installed diagonally downward from the bottom left end.
However, a connecting pipe 63 is protruded rearward from the upper right end, and the connecting pipe 63 installed at the upper end of the lower radiator 52 and the connecting pipe 62 at the lower left end are connected by a radiator hose 64 to the lower end of the lower radiator 52. A radiator hose 65 connects the water pump 42 and the water pump 042 to the water pump 42 and the front and rear seven cylinder blocks 34.
35 through a connecting pipe 66, and the 7 cylinder head of the front and rear cylinder prosock 34. Linda block 3
5. Cooling water circulates through the front cylinder block 34 1- The cooling water is introduced to the upper right end of the upper radiator 51 via the radiator hose 67 and the connecting pipe 63, and is circulated from the right inside the upper radiator 51 in which a water channel is formed in the horizontal direction. It is cooled while passing to the left, and the connecting pipe 62 and radiator hose 64 at the lower left end
The water is introduced into the upper end of the lower radiator 52 through the radiator hose 65, the water pump 42, and the connecting pipe 66. The cooling water is circulated to the front and rear Norinda blocks 34, 35 (7) and is configured to be efficiently cooled by an upper radiator 51 and a lower radiator 52.

The present invention has a cooling fan unit (53, 53) configured as described above, in which a cooling fan unit (53, 53) is provided at the rear of the upper radiator 51 and in a space above the seven-ring head of the anterior trachea (32, 32), the rear part of which is inclined upward with respect to the radiator surface. Therefore, the upper radiator 51 can be arranged in front of the upper part of the down tube 12, and the cooling fan unit 53, 53 can be arranged at the rear of the upper radiator 51 without interfering with the front cylinder 32, 32. By effectively utilizing the upper cylinders 32, 32 of the front cylinders of the transverse V-type engine, which have not been used in the past, the cooling fan unit 53,
53 is hidden in the left and right down tubes 12, 12, which is convenient in terms of appearance.

In addition, two cooling fan units 53 and 53 are disposed above the dead gas cover of the front cylinders 32 and 32, and
Since these fans 55.55ffi are formed to rotate from the top to the bottom at the inner end, the air that tends to stagnate in the upper part of the engine 25 is efficiently blown outward by the air 57.57 of the fans 55.55. This allows the Ennon 25 to be efficiently cooled.

As is clear from the above explanation, according to the present invention, since the cooling fan unit is arranged at an angle with respect to the radiator so that the rear part is located upward, it is possible to install a transverse V-type engine with a particularly large exhaust capacity. A radiator can be placed in front of the top of the down tube, and a cooling fan unit can be placed behind it, and the two cooling fans can effectively remove hot air above the engine to the outside of the engine. It exhibits excellent effects such as being able to improve ennon cooling performance.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a left (1111 side view) of my two-wheeled vehicle, Fig. 2 is a plan view of the engine part, etc., Fig. 3 is a rear view of the radiator and cooling fan unit, Fig. 4 is a partial cross-sectional side view of the same. In the drawing, 2 is the vehicle body frame, 12 is the wind tube,
25 is an engine, 51 is an upper radiator, 52 is a lower radiator, and 53 is a cooling fan unit. Patent Applicant Honda Motor Co., Ltd. Agent Patent Attorney 2 1) Yong-Soku

Claims (1)

[Claims] In a motorcycle equipped with a V-type engine having two cylinders at the front and rear of the crank 7-yaft, a radiator is disposed approximately vertically in front of and above the front cylinder of the V-type engine, and a radiator is disposed approximately vertically in front of and above the front cylinder of the V-type engine. A structure for obtaining a cooling fan unit for a motorcycle, characterized in that a cooling fan unit whose rear part is inclined upwardly and \\ with respect to the radiator surface is arranged on the back of the radiator in a space above the seven-ring head of a front cylinder.