JPH0328523A - Clutch plate - Google Patents

Abstract

PURPOSE:To increase durability of a multiple disk clutch without producing any stickslip and/or seizure by providing oil holding grooves and one or multiple convexes positioned between these grooves in the surfaces of an wet type multiple disk clutch. CONSTITUTION:A multiple disk clutch is provided with a housing 1 and hub 3 positioned relatively and rotatably and inner clutch plates 9 and 11 engaged with splines 5 and 7, respectively. The inner and outer clutch plates 9 and 11 form oil holding grooves 13 and 15 for holding lubricating oil and convexes 17 and 19 between these grooves on their surfaces, respectively. Since oil is also held between the clearance between respective convexes 17 and 19 of the opposed two clutch plates, large amount of oil is held to lubricate the surfaces sufficiently. Thus, the durability of a multiple disk clutch can be extremely improved without producing any stickslip and/or seizure.

Description

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

(Prior Art) Japanese Patent Application Laid-open No. 62-209249 describes “Power transmission device.
is listed. In this system, the input side of one system and the output side of two systems are connected by a pair of multi-plate clutches provided separately between them to transmit power.

(Problem to be solved by the invention) Generally, the clutch IilE101 of a multi-disc clutch has a third
As shown in Figure (a), oil retaining grooves 103 are provided on the surface.

However, as shown in FIG. 2B, the surface 105 other than the groove 103 is flat, so the lubricating oil retention property is poor. Therefore, as shown in FIG. 3(c), the inner clutch plate 107
It is easy for oil to run out between the grooves 109 and the surface 111 (sliding surface), and when the oil runs out, the clutch plates 101, 1
07 will occur intermittently, causing static slippage and seizure accompanied by noise and vibration, reducing the durability of the multi-disc clutch. Furthermore, since the friction coefficient of the clutch plates changes, the performance of the multi-disc clutch becomes unstable.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a temporary clutch that has good oil retention properties, does not cause stick-slip or seizure, and extends the durability of a multi-disc clutch and stabilizes its performance.

[Structure of the invention]

(Means for Solving the Problem) The clutch plate of the present invention is used in a wet multi-plate clutch that is provided between two relatively rotatable members and transmits torque by applying a pressing force. , and one or more convex portions arranged between the grooves.

(Function) Oil is retained not only in the oil retaining grooves but also in the gaps between the convex parts of the two opposing clutch plates, so the amount of oil retained is large and the surface is sufficiently lubricated, preventing stick-slip and burnout. No sticking occurs.

(Example) One embodiment will be explained with reference to FIG. 1 and FIG. 2.

FIG. 2 shows a multi-plate clutch using the clutch plates of this embodiment. This multi-disc clutch includes a housing 1 and a hub 3 which are arranged to be relatively rotatable, and outer and inner clutch plates 9.11 which are arranged alternately and are respectively engaged with the splines 5.7 of these members 1.3. These plates 9 and 11 are pressed and fastened by the suppressing member 13.

The inner and outer clutch plates 9 and 11 are die-cut to their respective profiles, and then stamped onto each surface as shown in Figure 1(a).
Oil retaining groove 13 for retaining the lubricating well as shown in (b)
．． 15 and a convex portion 17 between these grooves 13 and 15, respectively.
．． 19 was formed.

FIG. 1(a) shows an example of the outer clutch plate 9 cut in the direction perpendicular to the groove 13, enlarged 100 times. The radius of curvature of the corner portion 21 between the groove 13 and the convex portion 17 was 0.5 mm, and that of the convex portion 17 was 15 mm. Note that the radius of the convex portion 17 is suitably in the range of 10 mm to 20 mm.

In this way, the protrusions 17.1 are arranged between the grooves 13.15, respectively.
9, as shown in FIG. 1(b), a large amount of lubricating oil is retained between each clutch plate 9 and 11, and the sliding surfaces are always sufficiently lubricated and no breakage occurs. Therefore, stick-slip and seizure do not occur, and the durability of the multi-disc clutch is significantly extended. Incidentally, as a result of conducting a durability test on a multi-disc clutch using this example and a conventional product, it was confirmed that the former exhibits durability 5 to 10 times that of the latter. In addition, due to sufficient lubrication, the coefficient of friction between the clutch plates 9 and 11 becomes constant, and the change in the P-T characteristic, which is the relationship between the pressing force P and the transmitted torque T of a multi-disc clutch, becomes extremely small. Clutch performance becomes stable.

Note that two or more convex portions may be formed between the grooves. The curvature of the convex portion may be freely selected, and it is not necessary that the entire convex portion has the same curvature. For example, only the top portion may be relatively flat. The grooves may be provided not only in the radial direction as in the embodiment but also in the circumferential direction, or may be a combination of these. For processing, a method using a press is appropriate. Also, after forming deep grooves and high protrusions,
For the purpose of smooth sliding and uniform plate thickness, the surface may be polished to make only the tops of the convex portions relatively flat as described above.

〔Effect of the invention〕

As described above, since the clutch plate of the present invention has the convex portion between the oil retaining grooves, the lubricating oil retaining property is improved and the sliding surfaces are sufficiently lubricated. Therefore, stick friction and seizure do not occur, and the durability of the Tasaka clutch is significantly improved and its characteristics are stabilized.

[Brief explanation of drawings]

Figure 1 relates to one embodiment, (a) is an enlarged sectional view in the same direction of the outer clutch plate, Cb) is a circumferential sectional view of each of the inner and outer clutch plates, and Figure 2 is a Tasaka model using these clutch plates. A skeleton configuration diagram showing the configuration of the clutch, FIG. 3 is related to a conventional example, (a) is a plan view, and (b) is a diagram taken along A-A in (a).
Sectional view (c) is a circumferential sectional view of each inner and outer crassochi plate. 9,11...Clutch plate 13.15...Oil retaining groove 17.19...Protrusion

Claims (1)

[Scope of Claims] A wet multi-disc clutch that is provided between two relatively rotatable members and transmits torque by applying a pressing force, comprising: an oil retaining groove on the surface; A clutch plate characterized by being provided with one or more protrusions.