JP3232736B2 - Clutch housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention disclosed in this specification is
The present invention can be applied to a vehicle clutch device having a function of cooling a clutch assembly.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No.
No. 74326 is known as prior art. The prior art is installed between a cylinder block of an engine and a transmission as shown in FIG.
A clutch housing with a built-in clutch assembly is disclosed. A baffle plate is attached to the clutch housing by bolts on an inner peripheral surface closer to a transmission than the clutch assembly in an axial direction. An air introduction hole is provided on the outer peripheral surface of the clutch housing in the axial direction on the transmission side with respect to the baffle plate, and an air discharge hole is provided at substantially the same position as the clutch assembly in the axial direction. The cooling air sucked from the air introduction hole is guided into the inside of the clutch assembly by the baffle plate, cools the components of the clutch assembly, and is sent out of the clutch housing from the air discharge hole.

However, in the above prior art, the heat generated in the clutch assembly and the heat generated in the engine cylinder block are transmitted to the clutch housing and further transmitted to the baffle plate fixed to the clutch housing. Plates often hold heat. Here, since the cooling air sucked from the air introduction holes stays between the baffle plate and the clutch housing, the cooling air receives heat from the baffle plate and the clutch housing and becomes high in temperature before cooling the clutch assembly. However, there is a problem that the cooling function is impaired.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clutch housing having a large cooling effect for a clutch assembly.

[0005]

According to the present invention, there is provided a crankshaft for a vehicle engine.
Clutch fixed to the flywheel
A bar, and a pressure press provided on the clutch cover.
The clutch data pinched by the flywheel
To surround a clutch assembly comprising
Installed between the engine cylinder block and the transmission
The assembly in the axial direction of the crankshaft.
Air transmission holes are further provided on the transmission side and the
The clutch assembly in the axial direction of the crankshaft;
An outer peripheral portion provided with an air discharge hole at substantially the same position as the above,
Cooling air is supplied from the air introduction hole to the inner periphery of the clutch assembly.
In the clutch housing having an air duct for supplying the parts, the air duct is formed by a low material having heat transfer electrical resistance, and introduction portion in which the is fitted to the air inlet holes, are connected to the introduction section the introduction The cooling air introduced from the part was isolated from the outer peripheral part and the clutch assembly was cooled.
The rear cooling air flows forward along the outer surface of the clutch cover.
The clutch should not be circulated to the inner periphery of the clutch assembly.
And a shielding portion extending opposite to the outer surface of the clutch cover .

[0006]

SUMMARY OF According to the means described in the present invention as described above, since the air duct provided in the clutch housing is formed with a low heat transfer-conductive material, the heat held in the clutch housing into the air duct transmission Heat is not transmitted from the air duct to the cooling air. Also, when the air duct to isolate the cooling air introduced from the introduction portion of the clutch housing from the outer peripheral portion of the clutch housing co
At the outer surface of the clutch cover of the clutch assembly.
Due to the provision of a shielding portion extending Te, the heat to the cooling air from the clutch housing is transmitted rather than further
The air after cooling the clutch assembly is
Circulate along the outer surface of the
Rukoto will not name.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 is a side sectional view of a clutch device provided with a clutch housing according to the present invention.

In FIG. 1, reference numeral 1 denotes a clutch housing provided with an air duct 2 and a cylinder block 3 of an engine.
And a transmission 4, and has a built-in clutch assembly 5. The clutch assembly 5 is roughly divided into a clutch cover 7 provided with a pressure plate 6 and a clutch disk 10, and the clutch disk 10 is provided with a flywheel 9 fixed to a crankshaft 8 of an engine by bolts 8a and the pressure disk. It is sandwiched between the plate 6. The clutch cover 7 is attached to the flywheel 9 at an outer peripheral portion thereof.
The clutch disk 10 is spline-fitted to the input shaft 4a of the transmission 4 at the inner periphery thereof, and the driving force of the crankshaft 8 is transmitted via the flywheel 9, the clutch disk 10, and the input shaft 4a. And transmitted to the transmission 4. Further, the clutch cover 7 is provided with a diaphragm spring 11 for applying a pressing force to the pressure plate 6, and a plurality of circumferential slits 11a are provided in an inner peripheral portion of the diaphragm spring 11. In addition, the pressure plate 6 is also provided with a plurality of slits 6a on its circumference.

The clutch housing 1 has an outer peripheral portion 1 thereof.
An air introduction hole 1b is provided between the clutch assembly 5 and the transmission 4 on a, and an air discharge hole 1c is provided at approximately the same position as the clutch assembly 5 in the axial direction. The air duct 2 has an introduction portion 2 fitted into an air introduction hole 1b provided in the clutch housing 1.
a and, Kuratchika of the formed so as to cover the clutch housing 1 from the inner peripheral side Rutotomoni the clutch assembly 5
And a shielding portion 2b extending opposite to the outer surface of the bar 7 . It said air duct 2 is iron, or is constituted by a low material having heat transfer electrical properties such as heat-resistant resin, is fixed to the clutch housing 1 by bolts 2c.

Next, the operation of the above-described clutch device will be described. When the driving force of the crankshaft 8 of the engine is transmitted to the clutch cover 7 and the clutch disk 10 via the flywheel 9 when the clutch device is in the connected state, the clutch assembly 5 The air around the peripheral portion A is radiated to the outer peripheral portion by the rotation of the clutch cover 7 and the clutch disk 10. Therefore, the vicinity of the inner peripheral portion A is in a negative pressure state due to the roughened air, and air outside the clutch housing 1 is introduced into the clutch housing 1 from the air introduction hole 1b provided in the clutch housing 1. Is done. The introduced air passes through the introduction part 2a of the air duct 2 and the shielding part 2b and the clutch cover 7
It is led to between. The introduced air reaches the pressure plate 6 through the slits 11a of the diaphragm spring 11, and is discharged to the outside of the clutch housing 1 from the air discharge holes 1c provided in the clutch housing 1 through the slits 6a. . Further, when the clutch device is disconnected, a gap is generated between the pressure plate 6 and the clutch disk 10, so that the air that has passed between the slits 11a of the diaphragm spring 11 is dissipated by the pressure plate 6 and the clutch disk 10. After passing through the air discharge hole 1c
From the clutch housing 1.

The air passing near the pressure plate 6 and the clutch disk 10 receives the heat generated in the pressure plate 6 and the clutch disk 10 by the intermittent operation of the clutch device and the heat transmitted from the engine cylinder block to the clutch assembly 5. And then re-introduced into the clutch assembly 5 by the shield 2b
Since it is discharged to the outside of the clutch housing 1 without being performed, it is effective for cooling the clutch assembly 5.

As described above, according to the means described in the present invention, the air duct 2 installed in the clutch housing 1
Since the formation of a low heat transfer-conductive material, the heat held in the clutch housing 1 is hardly transmitted to the air duct 2, heat is transferred from the air duct 2 in the cooling air before it reaches the clutch assembly 5 Never. The air duct 2 separates the cooling air introduced from the introduction portion 2 a of the clutch housing 1 from the outer peripheral portion of the clutch housing 1, and the cooling air of the clutch cover 7 of the clutch assembly 5.
Since it has the shielding portion 2b extending to face the outer surface ,
Have previously heat to the cooling air to reach the clutch assembly 5 from the clutch housing 1 is transmitted rather than further
Cooling air after cooling the clutch assembly 5 is
Circulates along the outer surface of the latch cover 7 and reassembles the clutch.
Be introduced into the body 5 is not the name. Therefore, the clutch assembly 5
This is effective for improving the cooling effect of the refrigeration system.

[0014]

According to the clutch housing described in the present invention, since the cooling effect of the clutch assembly can be improved, the wear of the clutch disk due to the intermittent operation of the clutch device can be reduced, and the clutch device can be improved. Life can be extended.

Also, since it is only necessary to fix the air duct to the conventional clutch housing, a low-cost clutch housing with a cooling device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of a clutch device using a clutch housing of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Clutch housing 1a Outer peripheral part 1b Air introduction hole 1c Air discharge hole 2 Air duct 2a Introduction part 2b Shield part 3 Cylinder block 4 Transmission 5 Clutch assembly

Claims (1)

(57) [Claims] 1. A vehicle engine having a crankshaft.
A clutch cover fixed to the flywheel
The pressure plate provided on the clutch cover
A clutch disc sandwiched between the flywheel and
Said engine to surround a clutch assembly comprising
Installed between the cylinder block and the transmission,
In the axial direction of the rank shaft, the assembly
An air introduction hole is provided on the
Substantially the same as the clutch assembly in the axial direction of the shaft
An outer peripheral portion in which an air discharge hole is provided in the
More cooling air is supplied to the inner peripheral portion of the clutch assembly.
A clutch housing with an air duct
The air duct is formed with a low heat transfer conductivity of the material, the introduction portion which is fitted in the air inlet holes, said outer peripheral cooling air introduced from the connected to the introduction section <br/> the introduction portion For cooling after isolating from the part and cooling the clutch assembly
Air flows along the outer surface of the clutch cover
The clutch cover so as not to circulate around the inner periphery of the assembly
And a shielding portion extending opposite to the outer surface of the clutch housing.