JPH0311056Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a clutch cooling device for a dry clutch in a vehicle such as an agricultural tractor.

<Prior Art> In vehicles such as agricultural tractors, a clutch housing containing a dry clutch (including a flywheel) is directly connected to the rear of the engine, and a bonnet is arranged to cover the upper part of the clutch housing.

When working on a tractor with a ground implement such as a front loader, the clutch is often used in a partially engaged state, causing the clutch disc to heat up and seize, causing foul-smelling gas to emit from the lining. or reduce clutch life.

Therefore, an air inlet and an air outlet are formed in the clutch housing, and the clutch is forcedly cooled by air taken in from the outside.

<Problems to be solved by the invention> In the conventional technology, the air intake port and the air outlet port are formed on the left and right sides of the clutch housing.
Air flows in the radial direction of the clutch, and when the inner peripheral surface of the clutch housing is approximately circular, air flows in the circumferential direction and is released in the tangential direction as the clutch rotates. Air intake and air exhaust were obstructed and adequate air circulation was unlikely. Further, since the intake port and the exhaust port are separated on the left and right sides of the clutch, the intake air is discharged after only making approximately half a turn inside the clutch housing, resulting in a small amount of heat radiation and low cooling efficiency. Furthermore, since the exhaust port is a simple hole, air is not guided from the inner circumferential surface of the clutch to the exhaust port, resulting in a small amount of air being discharged.

<Means for Solving the Problems> The present invention solves the problems of the prior art by connecting the air intake port 22 and the air outlet 23 to the clutch 14.
Both openings 2 are oriented in the tangential direction of the outer circumference of the
2 and 23 are placed close together, and the air outlet 23 is placed close to each other.
An air outlet recess 37 is provided on the inner peripheral surface 3a of the clutch near the inner peripheral surface 3a of the clutch.
This problem was solved by forming .

That is, the specific feature of the problem-solving means of the present invention is that a clutch housing 3 having a substantially circular inner circumferential surface 3a and containing a dry clutch 14 is connected to the rear of the engine 2. In a clutch cooling system for a vehicle in which the clutch housing 3 is formed with an air intake port 22 that takes in air for clutch cooling and an air exhaust port 23 that discharges air to the outside, the air intake port 22 is connected to a tangent to the outer periphery of the clutch 14. The air outlet 23 is formed to be substantially oriented in the direction
is formed approximately along the tangential direction of the outer periphery of the clutch 14, the air intake port 22 is arranged adjacent to the front side of the air outlet port 23 in the clutch rotation direction A, and the air intake port 22 is arranged adjacent to the front side of the air outlet port 23 in the clutch rotation direction A. 2, an air outlet recess 37 is formed in the inner circumferential surface 3a.

<Operation> When the clutch 14 rotates within the clutch housing 3 having a substantially circular inner circumferential surface 3a, a circumferential wind flow is generated on the circumferential surface, and the wind is emitted from the outer circumference of the clutch in a tangential direction. The air outlet 23 is guided by the air outlet recess 37 located in the front direction.
Air is smoothly discharged from the air intake port 22 located near the front of the exhaust port 23 in the direction of rotation of the clutch and rearward in the tangential direction of the outer periphery of the clutch. It goes around once and reaches the discharge port 23.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 and 2, 1 is a tractor, and a vehicle body 5 is formed by directly connecting an engine 2, a clutch housing 3, a transmission case 4, etc.
A front axle frame 6 is attached to the front of the vehicle, and a radiator 7 and a battery 8 are placed on top of the frame 6, and an air cleaner 9 is arranged thereon.

The radiator 7 is a forward discharge type and is located away from the engine 2 in front of the fan shroud 3.
The shaft 31a of the fan 31 supported at
3 by a flexible shaft 34.

In this way, Juan 31 and Juan Shuroud 30
By supporting the fan shaft 31a and connecting it with the intermediate shaft 33 and the flexible shaft 34, the mounting accuracy of each member can be made rough, and the slight eccentricity of the fan shaft 31a can be absorbed. Compared to a structure supported by the front axle frame 6 and connected to the intermediate shaft 33 via a straight shift, durability is improved and costs can be reduced.

10 is a ponnet that covers the engine 2, radiator 7, air cleaner 9, etc. above, and
Its rear part surrounds a fuel tank 11 arranged above the clutch housing 3.

Reference numeral 14 denotes a dry double clutch (a single clutch may also be used) housed in a clutch housing 3 having a substantially circular inner circumferential surface 3a.
Clutch disk 18 splined to 7
is suppressed by pressure plate 19, and
It rotates in the direction of arrow A shown in the figure. 20 indicates a release bearing.

The crunch housing 3 has two parts on its upper side.
openings 22 and 23 are formed, and openings 22 and 23 are formed.
A pipe 24 is connected to the (air intake port) via an elbow to form an air intake path 25, and the opening 2
Pipe 27 is connected to 3 (air outlet) through the elbow.
are connected to form an air exhaust path 28.

The opening 22 of the air intake passage 25 is formed along the tangential direction of the inner circumferential surface 3a of the clutch housing 3, and therefore extends in the tangential direction B rearward of the outer circumference of the clutch 14 rotating in the direction of the arrow A in FIG. The center line of the opening 22 substantially coincides with the tangential direction B of the clutch 14, and the pipe 24 is located within the rear portion of the bonnet 10. This pipe 24 is configured such that its rear side extends upward along a shielding plate 29 that shields the hot air from the engine 2 from hitting the tank 11, etc., and takes in air from above the fuel tank 11. Also good.

The opening 23 of the air exhaust passage 28 is located at the upper side of the clutch housing 3 and is formed so as to be oriented substantially forward in the tangential direction B of the outer periphery of the clutch 14 along the tangential direction of the inner circumferential surface 3a. Its center line substantially coincides with the tangential direction B of the outer periphery of the clutch, and the pipe 27 passes through the shielding plate 29 and passes through the fan 3.
It extends to the rear of 1. The tip of the pipe 27 is substantially along the flow of the radiator cooling air from the fan 31, and the air inside the clutch 14 can be forcibly discharged by the suction action of the fan 31. It is preferable that this pipe 27 is made of an elastic material such as a rubber hose and is arranged along the top plate of the bonnet 10.

The air intake side opening 22 and the air discharge side opening 2
3 are arranged adjacent to each other, and the opening 22 is adjacent to the opening 23 in front of it in the direction of rotation A of the clutch.

An air outlet recess 37 is formed on the inner peripheral surface 3a of the opening 23 on the rear side in the clutch rotation direction A. This air outlet recess 37 guides the air after the clutch has been cooled to enter the opening 23 in a larger amount and more smoothly, and has a shape that widens downward from the opening 23 as shown by the dotted line in Figure 2. .

38 is a mounting base 2 on the outer surface of the clutch housing 3
9 through bolts 40, and the openings 22, 23 and the pipe 2 connected thereto.
4,27 is protected.

42 is a clutch inspection window, to which a window cover 43 is attached. 44 indicates a through hole for the clutch lever shaft.

<Effects of the Invention> According to the present invention described in detail above, the air intake port 22, which is oriented substantially rearward in the tangential direction of the outer periphery of the clutch 14, is provided in the clutch housing 3 having the substantially circular inner circumferential surface 3a. Since the air outlet ports 23 are respectively formed to be substantially oriented, air can be smoothly sucked in from the air intake port 22 and air can be smoothly discharged from the air outlet port 23 by the rotation of the clutch 14. Moreover, since the air outlet recess 37 is formed on the rear side of the air outlet 23 in the direction of clutch rotation, air can flow out smoothly and in large quantities from inside the clutch housing 3. Since it is located near the front in the rotational direction A, the air taken in can be made to circulate approximately once inside the clutch housing 3, and the clutch 1
4 can be cooled more effectively and the life of the clutch can be extended.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the main part, FIG. 2 is a side view of the clutch housing, and FIG. 3 is a partially sectional side view of the clutch housing. DESCRIPTION OF SYMBOLS 1... Tractor, 2... Engine, 3... Clutch housing, 14... Clutch, 22... Air intake port, 23... Air exhaust port, 25... Air intake path, 28... Air exhaust path, A...Rotation direction, B
...Tangential direction, 37...Air lead-out section.

Claims (1)

[Claims for Utility Model Registration] A clutch housing 3 having a substantially circular inner peripheral surface 3a and containing a dry clutch 14 is connected to the rear of the engine 2, and air for clutch cooling is introduced into the clutch housing 3. In a vehicle clutch cooling device in which an air intake port 22 and an air discharge port 23 for discharging to the outside are formed, the air intake port 22 is formed to be substantially oriented in the tangential direction of the outer periphery of the clutch 14, and the air discharge port 23
is formed substantially along the tangential direction of the outer periphery of the clutch 14, the air intake port 22 is arranged adjacent to the front side of the air outlet port 23 in the clutch rotation direction A, and the air intake port 22 is arranged adjacent to the front side of the air outlet port 23 in the clutch rotation direction A. A clutch cooling device for a vehicle is characterized in that an air outlet recess 37 is formed in an inner circumferential surface 3a.