JPH0150771B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a wet type multi-plate clutch.

(Prior Art) In the wet type clutch 1 shown in FIG.
Although it has the function of intermittent discontinuation, the conventional separator plate 2 has a fairly high flatness accuracy, and also requires some degree of cooling and lubrication on the surface of the friction plate 3. This causes deterioration in clutch disengagement, generation of drag friction heat, etc., which tends to impair the durability of the entire clutch device, and tends to cause vehicle troubles such as poor operation.

As a solution to this problem, there is a separator plate disclosed in Utility Model Application No. 122815-1981 (Utility Model Application No. 31527-1988) filed jointly with other companies by the present applicant.

As shown in FIG. 6, this separator plate is formed of a ring-shaped annular plate 5 and a plurality of engaging parts 6 that protrude radially on the outer periphery of the ring-shaped annular plate 5, and is located between the engaging parts 6 of the annular plate 5. In the wet type clutch shown in FIG. 7 using this separator plate 8, the wave 7 is formed in the eighth part when the power is cut off. As shown in the figure, there is no deformation at all, and there is a friction plate 3 at the top of the wave 7.
are in light contact with each other, and during power transmission, the friction plate 3 is pressurized in the axial direction by the piston 9, and the wave 7 of the separator plate 8 is pinched between the adjacent friction plates 3, and its height increases. is gradually reduced, and finally the entire annular plate 5 is located in the same plane,
Separator plate 8 and friction plate 3
are in close contact with each other, and power is transmitted by the frictional force between the two. When the pressure in the axial direction of the friction plate 3 by the piston 9 is released,
Regardless of the adhesive strength of the lubricating oil, the elasticity of the waves 7 reliably separates the friction plate 3 from the separator plate 8, cutting off power transmission. Therefore, the clutch has good disengagement and generates less drag frictional heat.

(Problem to be Solved by the Invention) By the way, although the wet clutch using the separator plate 8 mentioned above ensures good clutch engagement, it is difficult to improve the durability of the friction plate or the clutch as a whole. It is important to lubricate and cool the clutch. Particularly during continuous operation with the clutch in the partially engaged state, heat generation is very high and the thermal load on the clutch facing becomes quite large, so cooling is required.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a wet type multi-disc clutch that can efficiently cool the separator plate and hence the friction plate and improve the durability of the friction plate.

(Means for Solving the Problems) A wet type multi-plate clutch of the present invention for solving the above problems has a plurality of engaging parts projecting radially on the outer periphery of an annular plate. Two separator plates that form waves protruding in the plate thickness direction in the portions located between the joints are moved by shifting the positions of the engaging portions on the outer periphery and flicking them so that the crests and troughs of the waves face each other. The gear is assembled to the driving drum between the separator plates, and the lubricating oil hole of the driven gear is opened toward the center between the two separator plates.

(Function) The wet type multi-disc clutch with the above structure not only ensures reliable and good engagement and disengagement of the clutch like the conventional wet type clutch, but also allows a large amount of lubricating oil to flow in when the clutch is disengaged or half-clutched. Since the flow rate increases by the amount that passes through the gap (oil pool) formed between the separator plates, the cooling effect of the separator plates and, in turn, the friction plates is performed satisfactorily.

(Embodiment) An embodiment of the wet type multi-plate clutch of the present invention will be explained with reference to the drawings. Fig. 1 is a longitudinal cross-sectional view showing the main parts, and 10 and 10' are two separator plates; Two separator plates 10,1
0' is formed of an annular plate 11 and eight engaging parts 12 that protrude radially from the annular plate 11, as shown in FIG. Waves 13, 13' protruding from
was formed. This wave 13,1
3' is a part in which peaks 14 and valleys 15 are arranged alternately in the part located between the engaging parts 12, and the waves 13,
The height of 13' is about 1/5 of the thickness of separator plates 10, 10'.

Such two separator plates 10, 10'
As shown in FIG.
The positions of the waves 13 are shifted so that the peaks 14 and valleys 15 of the waves 13 face each other, and the waves 13 are assembled between the friction plates 17 provided at regular intervals on the driven gear 16 as shown in FIG. The mating portion 12 is engaged and fixed in a groove 20 on the inner surface of the drive side drum 19.

However, as shown in FIG.
It opens toward the center between 0 and 10'. still,
23 in FIG. 1 is a piston.

In the wet type multi-plate clutch of the present invention constructed as described above, when the power is cut off, the waves 13 of the two separator plates 10, 10' are not deformed at all as shown in FIG. The peaks 14 are in light contact with the friction plate 17.

During power transmission, the friction plate 17 is pressurized in the axial direction by the piston 23, and the wave 13 of the two separator plates 10, 10' is compressed between the adjacent friction plates 17, and its height gradually increases. reduced, and finally the annular plate 1
1 are all located in the same plane, and the separator plates 10, 10' are brought into close contact with each other, and at the same time, the separator plates 10, 10' are securely brought into close contact with the friction plate 17, and the frictional force between the two Power is transmitted through this.

Friction plate 17 by piston 23
When the pressure in the axial direction of
0', and power transmission is cut off. Also, the separator plates 10, 10' are prevented from adhering to each other. When the above-mentioned power transmission is cut off or the clutch is half-engaged, the lubricating oil hole 22 of the driven gear 16
From there, a large amount of lubricating oil flows between the two separator plates 10, 10' as shown by the arrow in FIG. As a result, two separator plates 10, 10'
The flow rate increases by the amount that passes through the oil pool formed between the two. Therefore, the heat generated during continuous operation in a half-clutch state is suppressed to a low level, and the heat load due to clutch fading is significantly reduced. Moreover, the thermal energy that one separator plate should absorb is only half.

(Effects of the Invention) As can be seen from the above explanation, the wet multi-plate clutch of the present invention has a plurality of engaging parts that protrude radially around the outer periphery of the annular plate, and a plurality of engaging parts that protrude in the plate thickness direction between the engaging parts. Two separator plates that form waves,
Since the engaging parts on the outer periphery are shifted in position and assembled on the drive side drum between the friction plates so that the crests and troughs of the waves face each other,
When transmitting power, the two separator plates come into close contact with each other, and at the same time, the two separator plates come into close contact with the adjacent friction plate, and power is transmitted through high frictional force, and when the power is cut off,
Regardless of the adhesive force of the lubricating oil, etc., the elasticity of the waves reliably separates the friction plate from the separator plate, cutting off the power, and at the same time preventing the separator plates from adhering to each other, thereby reducing drag torque. Therefore, the clutch engages and engages very well, and generates little drag frictional heat.

In addition, in the wet multi-plate clutch of the present invention, the lubricating oil hole of the driven gear is opened towards the center between the two separator plates, so a large amount of lubricating oil flows when power transmission is interrupted or the clutch is half-engaged. , the flow rate increases by the amount that passes through the oil pool formed between the two separator plates. Therefore, the heat generated by the separator plate and friction plate during continuous operation in a half-clutch state is suppressed, the heat load of clutch fading is significantly reduced, and the thermal energy that each separator plate must absorb is halved. As a result, the cooling effect of the separator plate and thus the friction plate is improved and lubrication is performed well, thereby improving the durability of the friction plate and the durability of the clutch as a whole.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a main part showing an embodiment of a wet type multi-disc clutch of the present invention, FIG. 2 is a perspective view showing a separator plate in the wet type multi-disc clutch of the present invention,
Figure 3 is a diagram showing the state in which the two separator plates shown in Figure 2 are assembled between the friction plates, and Figures 4a and b are cross-sectional views showing the lubricating oil hole opening toward the center between the separator plates. , FIG. 5 is a vertical cross-sectional view of the main parts of a conventional wet clutch, FIG. 6 is a perspective view of a conventional improved separator plate, and FIG. 7 is a longitudinal cross-sectional view of a wet clutch equipped with the separator plate shown in FIG. 6. The top view, FIG. 8, is a diagram showing a state in which the separator plate of FIG. 6 is assembled between friction plates. 10, 10'... separator plate, 11...
... Annular plate, 12 ... Engagement part, 13, 13' ... Wave, 14 ... Mountain, 15 ... Valley, 17 ... Friction plate, 19 ... Drive side drum, 21
...Driven side gear, 22...Lubricating oil hole.

Claims (1)

[Claims] 1 In a wet type multi-plate clutch, two separator plates having a plurality of engaging parts protruding radially on the outer periphery of the annular plate and forming waves protruding in the plate thickness direction between the engaging parts are attached to the outer periphery of the annular plate. Assemble it to the drive side drum between the friction plates by shifting the position of the engaging part so that the peaks and valleys of the waves face each other, and insert the lubricating oil hole of the driven gear between the two separator plates. A wet multi-plate clutch characterized by opening toward the center of the clutch.