JPH0222502Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a lubrication structure for a wet clutch.

(Prior Art) An example of a conventional wet clutch lubrication structure is shown in Fig. 3 (Japanese Patent Application No. 1983-
No. 4600). This is a wet clutch for a vehicle, in which an oil pump 100 is disposed coaxially with a clutch shaft 101, and a cylindrical oil passage is formed between the clutch shaft 101 and a drive sleeve 103 integrally formed with a clutch cover 102. form 104,
The lubricating oil from the oil pump 100 that is rotationally driven by the drive sleeve 103 is supplied to the clutch cover 1.
02 and clutch disk 105
The sliding friction surface of the oil pump 100 and the oil passage 1 are lubricated with liquid mainly for cooling.
04 and both 100, 104
It is possible to omit the piping that connects the

However, in the lubrication structure of such a conventional wet clutch, the drive sleeve 103
Since the lubricating oil is supplied to the inside of the clutch cover 102 through an oil passage 104 formed inside the clutch cover 102, the sliding friction part located outside the clutch cover 102, that is, the drive sleeve 10
3 and the cylindrical portion 107 of the pump casing 106 that fits over this, and the clutch lever 108
There is a problem in that the lubrication between the release sleeve 109 and the release sleeve 109 is not sufficient, and there is a risk of accelerated wear of these parts and even seizure.

(Purpose of the invention) This invention was made in view of these conventional problems, and it is possible to supply lubricating oil discharged from the oil pump not only to the inside of the clutch cover but also to the sliding friction part on the outside. The purpose of this invention is to appropriately lubricate these sliding friction parts with liquid to solve the above-mentioned problems.

(Example) This invention will be explained below with reference to the example shown in FIGS. 1 and 2.

In the figure, numeral 1 is the clutch shaft;
The proximal end side is rotatably supported on the front cover 2 of the housing via a bearing 3, and the distal end protrudes inside the clutch housing 3 which is integrated with the front cover 2. A clutch disk 4 is spline-coupled to the clutch shaft 1 so as to be movable in the axial direction, and a flywheel 6 is supported at the tip via a bearing 5 so as to be relatively rotatable. 7 is the clutch cover, flywheel 6
A drive sleeve 9 is fixed to the outer circumference of the clutch shaft 1, covers the clutch disk 4 and the pressure plate 8, and fits onto the clutch shaft 1 so as to be relatively rotatable.
are integrally connected. flywheel 6
is rotationally driven by an engine output shaft 35 connected to an engine (not shown), and the clutch disk 4 is connected to the flywheel 6 by a pressure plate 8 which is constantly biased to the right in the figure by a clutch spring 10.
The clutch shaft 1 is rotatably driven by being press-connected to the clutch shaft 1.

On the other hand, a pump casing 11 is attached to the front cover 2 to define a pump chamber 12, which will be described later. The pump casing 11 has a bush 2 extending toward the clutch disk 4 and serving as a bearing member.
A cylindrical portion 14 is formed to be externally fitted onto the drive sleeve 9 via 8 and 29, and a release sleeve 15 is slidably fitted onto the cylindrical portion 14, and the tip of the clutch lever 17 is fitted onto the release bearing 16. The lever 17, which rotates together with the flywheel 6, comes into sliding contact with the side surface of the outer race of the bearing 16. That is, when the clutch pedal (not shown) is depressed, the withdrawal lever 18 is tilted, the release sleeve 15 is moved to the right in the diagram, and the clutch lever 17 is tilted to resist the elastic force of the clutch spring 10. The pressure plate 8 is moved to the left in the figure to disconnect the clutch disk 4 from the flywheel 6.

Further, a pump gear 19 is built into the pump chamber 12 to partition a suction chamber 20 and a discharge chamber 21, and an oil pump 22 is configured coaxially with the clutch shaft 1. The pump gear 19 is splined to the drive sleeve 9 and is rotationally driven. Lubricating oil is supplied to the suction chamber 20 of the oil pump 22 through a suction pipe 23, which has one end connected to a suction port 20a bored in the pump casing 11 and the other end immersed in a lubricating oil reservoir (not shown). It can be done. Reference numeral 24 designates a regulator valve which has the function of allowing high-pressure oil in the discharge chamber 21, which is generated when the engine rotates at high speed, to escape into the clutch housing 3.

The front cover 2 and the pump casing 11, which are on both sides of the pump gear 19, each have oil passages 25, 26 that open one end into the discharge chamber 21.
form.

The other end of the oil passage 26 of the pump casing 11 is communicated with a cylindrical oil passage 27 formed by the cylindrical portion 14 and the drive sleeve 9. Each bush 28, 29
The oil pump 22 has axially oriented fine holes 28a and 29a formed at appropriate intervals in the circumferential direction.
As a result of this drive, lubricating oil is ejected from the tip of the cylindrical portion 14 to the outside of the clutch cover 7 (see FIG. 2).

Further, the oil passage 25 of the front cover 2 is connected to an annular oil passage 37 formed on the outer periphery of the clutch shaft 1 by sealing between the clutch shaft 1 and the drive sleeve 9 with a seal ring 36, The oil passage 30 communicates with an oil passage 30 formed in the radial direction in the clutch shaft 1, and the oil passage 30 communicates with an oil passage 31 formed in the axial direction in the clutch shaft 1. 32 is opened into the inside of the clutch cover 7, and a radial oil passage 33 is opened into a space 34 defined by the flywheel 6 and the clutch disc 4.

Next, the effect will be explained.

When a clutch pedal (not shown) is released, the clutch disk 4 is compressed between the pressure plate 8 and the flywheel 6 by the elastic force of the clutch spring 10, and is connected to the flywheel 6.

By the way, the oil pump 22 is always driven while the engine is operating. The lubricating oil in the discharge chamber 21 is introduced into the oil passage 27 from the oil passage 26 of the pump casing 11, and is introduced into the clutch cover 7 from the tip of the cylindrical part 14.
The liquid lubricates the release bearing 16 and the sliding friction portion between the bearing 16 and the clutch lever 17 to prevent wear and seizure. Further, the lubricating oil in the discharge chamber 21 is introduced into the oil passage 25, the annular oil passage 37, the oil passage 30, and the oil passage 31 of the front cover 2, and some of it is squirted into the inside of the clutch cover 7 from the oil passage 32. Liquid lubrication is applied to the sliding friction surfaces between the clutch disk 4 and the pressure plate 8 to suppress wear and fade, and the remaining oil passage 3
3 into the space 34 and liquid lubricates the sliding friction surfaces of the clutch disk 4 and flywheel 6.

(Structure of the invention) As explained above, according to this invention, the structure is such that a drive sleeve that loosely fits around the outer periphery of the clutch shaft is integrally formed on the clutch cover,
An oil pump rotatably driven by the drive sleeve is provided coaxially with the clutch shaft, a cylindrical portion of the pump casing is fitted around the outer periphery of the drive sleeve, and a release sleeve is slidably fitted to the cylindrical portion. In the wet clutch lubrication structure, the oil pump is connected between the cylindrical portion of the pump casing and the drive sleeve and in the pump casing, and the discharge chamber of the oil pump and the inside of the clutch cover are communicated through an oil passage. The wet clutch lubrication structure has an oil passage that communicates the discharge chamber with the outside of the clutch cover.

(Effect of the invention) Therefore, the sliding friction part inside the clutch cover is well lubricated with liquid, suppressing abnormal wear and fading of the clutch disk, and the sliding friction part outside the clutch cover, that is, the bush,
The effect is obtained that the release bearing and the space between the bearing and the clutch lever are well lubricated with liquid, thereby preventing wear and seizure of these parts.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of this invention, FIG. 2 is a cross-sectional view of the same essential part, and FIG. 3 is a cross-sectional view showing a conventional structure. 1: Clutch shaft, 4: Clutch disk, 6: Flywheel, 7: Clutch cover,
8: Pressure plate, 9: Drive sleeve, 11: Pump casing, 14: Cylindrical part, 1
5: Release sleeve, 19: Pump gear, 2
0: Suction chamber, 21: Discharge chamber, 22: Oil pump, 25, 26, 27, 30, 31, 32, 3
3: Oil passage, 28, 29: Butsuyu, 37: Circular oil passage.

Claims (1)

[Scope of utility model registration request] A drive sleeve that loosely fits around the outer periphery of the clutch shaft is integrally connected to the clutch cover, an oil pump that is rotationally driven by the drive sleeve is installed coaxially with the clutch shaft, and the cylindrical part of the pump casing is fitted around the outer periphery of the drive sleeve. A wet clutch lubrication structure in which a release sleeve is slidably fitted into the cylindrical part, and the discharge chamber of the oil pump and the inside of the clutch cover are communicated through an oil passage, A lubrication structure for a wet clutch, characterized in that an oil passage is formed between the cylindrical portion 14 of the pump casing and the drive sleeve 9 and in the pump casing 11 to communicate the discharge chamber of the oil pump with the outside of the clutch cover. .