JPH0144821Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the structure of a driven plate that can be adopted as a drive plate for power transmission such as a clutch for an automobile.

(Prior Art) As a conventional solid type driven plate for a clutch, for example, as shown in FIG. 4, there is a known one in which friction facings 2, 2 are integrally molded on both sides of a central driven plate 1 (core plate). In that case, the driven plate 1 is a steel plate, and the friction facing 2 is an organic material mixed in a rubber-based binder with glass fiber as a friction material. Grooves 3 and 4 are formed on the surface of the facing 2. However, the conventional grooves 3 and 4
The positions of grooves 3 and 4 are different on the front and back sides, so use the heat press mold to mark the positions of grooves 3 and 4 with arrows P1 and P, respectively.
Driven plate 1 in the center when applying pressure in two directions
The friction facing 2 has a curved shape as shown in 1', and the flatness of the friction facing 2 becomes poor when the product is taken out after molding. As a countermeasure to this problem, the surface of the friction facing 2 is ground after taking out the product, but since the entire surface is thin, it easily fits into a grinder, and as a result, sufficient flatness cannot be obtained. Furthermore, since the materials of the friction facings 2, 2 on both sides are not integrated, there is also a drawback that they tend to peel off from the driven plate 1.

(Purpose of the invention) This invention prevents bending due to load deviation when forming grooves on the surface of a friction facing, and also allows the materials of the front and back friction facings to be integrated using the groove forming part. The purpose is to do so.

(Structure of the invention) The invention is a driven plate in which friction facings are integrally molded on both sides.The driven plate is provided with a large number of slits, and the facing portions on both sides of the slits are provided with grooves having a width narrower than the width of the slits. This is a driven plate for a clutch that is characterized by:

(Embodiment) The driven plate 5 in FIGS. 1 and 2 showing an embodiment is a ring-shaped steel plate, and has slits 6 that are generally radial from the inner circumference (circumferential portion with radius R1) at equal intervals. This slit 6 is slightly inclined (by an angle α) toward the side opposite to the rotational direction R as it approaches the outer circumference of the driven plate 5. The driven plate 5 has other radial slits 7 opened toward the center of the driven plate at equal intervals on its inner periphery. This slit 7 is located closer to the center than the radius R1, and occupies a position approximately between the two slits 6, 6, avoiding intersecting with the outer slit 6, and a driven plate is installed between the adjacent slits 7, 7. Two rivet holes 8 are provided for use. The slit 7 serves to maintain the flatness of the driven plate 5 when the driven plate 5 is fastened to the outer periphery of the clutch plate of the clutch with rivets. That is, when installed, the inner circumferential portion of the driven plate 5 functions as an insulator to prevent the tendency of the inner peripheral portion to curve like a disc spring.

The friction facings 9 that are heat-pressed on both sides of the driven plate 5 have a width L2 which is narrower than the width L1 of the slits 6 on the front and back portions corresponding to the slits 6.
The groove 10 has a rectangular cross section, and the inner and outer ends of the groove 10 are open. The friction facing materials on the front and back sides of the driven plate 5 are integrated through the slits 6 in the hot pressing process when forming the grooves 10, and the front and back materials are integrated at the outer periphery (width L3 portion) of the driven plate 5. It is integrated. In the clutch, the groove 10 serves as a discharge passage for abrasion powder caused by friction with the mating pressure plate, flywheel, etc., and also allows a certain amount of air to pass through, thus serving as an air cooling groove. In addition, the grooves 10 provide portions with different coefficients of friction at equally spaced positions on the circumference of the friction facing, and in terms of friction characteristics with the mating friction material,
Shows favorable characteristics in terms of anti-jadder and aggressiveness against mating friction materials.

To manufacture the driven plate assembly according to the present invention, the driven plate 5 is placed in the mold of a heat press.
Then, two sheets of friction facing material are placed to sandwich the two friction facing materials on both sides, and the mold is closed with the groove-forming convex portion on the inner surface of the mold and the slit 6 aligned, and hot-pressed at high pressure. At this time, the friction materials on both the front and back sides are integrated through the slit 6, and the front and back are integrated at a portion of width L3 on the outer periphery of the driven plate 5.
The product taken out from the mold after hot pressing can be used as is, or the surface of the friction facing can be ground to further improve flatness.

(Effects of the invention) (1) The grooves 10 of the friction facing 9 are pressed with high pressure from both the front and back surfaces, so they have a high density and firmly grip the periphery of the slits 6 of the driven plate 5, making them strong. A mold is made.

(2) Since high pressure is applied only to the inside of the slit 6 of the driven plate 5, and even pressure is applied to the other driven plate parts, the flatness of the product is improved. Peel strength also increases.

(3) Since the central driven plate 5 does not curve, even if the driven plate surface other than the slits 6 is worn, the grooves 10 remain, and the wear debris discharge and air cooling effects are maintained. That is, it can be used until the facings 9 on both sides are worn out while maintaining favorable frictional characteristics, which is economical.

(Another Embodiment) In addition to the grooves 10 shown in FIG. 1, grooves intersecting with the grooves 10 may be provided in a mesh shape, and the shape of the slits 6 can also be changed. That is, instead of the illustrated slit 6, a slit (elongated hole) whose outer peripheral side of the driven plate is not open may be used.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway plan view, Figure 2 is a partially cutaway plan view.
The figure is a sectional view of Fig. 1, Fig. 3 is a sectional view of Fig. 1, and Fig. 4 is a sectional view of Fig. 1.
FIG. 5... Driven plate, 6... Slit, 9... Friction facing, 10... Groove.

Claims (1)

[Claims for Utility Model Registration] (1) In a driven plate in which friction facings are integrally molded on both sides, a large number of slits are provided in the driven plate, and grooves with a width narrower than the width of the slits are provided in the facing portions on both sides of the slits. A driven plate for a clutch, which is characterized by being provided with. (2) The driven plate for a clutch according to claim 1, wherein the slits extend radially from the inner peripheral part of the driven plate and are open at the outer peripheral end of the driven plate. (3) The driven plate for a clutch according to claim 1, wherein the driven plate has another radial slit on its inner circumference that opens toward the center of the driven plate.