JPS6132168Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pressure plate in a clutch device for an automobile or the like.

The friction surface of the pressure plate in the clutch device is subject to wear due to its frictional engagement with the facing of the clutch disk, and the wear is particularly increased when a metallic material is used for the clutch facing. In addition, since the friction surface of the pressure plate is reground each time the clutch disk is replaced, the pressure plate gradually becomes thinner, causing the problem of cracks occurring when the limit of use is exceeded.

It is conceivable to mark the outer periphery of the pressure plate to indicate the usage limit of the pressure plate, but since the friction surface of the pressure plate is configured to be larger than the diameter of the clutch facing, The wear occurs in stages and therefore the amount of wear cannot be seen with the clutch device installed.

The present invention was devised in view of the above points, and aims to provide a pressure plate that can detect the amount of wear even when a clutch device is assembled. The explanation will be based on.

In the figure, 1 is a flywheel fixed to the crankshaft of an engine (not shown), and 2 is a transmission input shaft 3 disposed opposite to the flywheel 1.
A clutch disk is spline-fitted to the clutch disk, and facings 2a and 2b are attached to both sides of the outer circumference by rivets 2c.

Reference numeral 4 designates a pressure plate disposed opposite the clutch disc 2, and a friction surface 4a thereof is provided with a wear allowance indicating groove 4b extending from the outer periphery to a contact portion with the clutch facing 2b. The side surface 4c of this groove 4b indicates the usage limit of the pressure plate 4. Note that if a plurality of grooves are provided, the amount of wear can be detected even more easily.

5 is a clutch cover attached to the flywheel 1 with bolts 6; 7 is a clutch spring disposed between the clutch cover 6 and the pressure plate 4;
is constantly biased to press it toward the flywheel 1 side.

8 is a flywheel housing provided with an inspection window 8a; 9 is a clutch housing attached to the flywheel housing with bolts 10; both housings allow the flywheel, clutch disk, pressure plate, etc. Surrounding.

The present invention is constructed as described above, and since the friction surface 4a of the pressure plate 4 is provided with the wear allowance display groove 4b that reaches from the outer periphery to the contact area with the clutch facing 2b, the engine can be stopped. The groove 4b can be seen through the inspection window 8a.
By replacing the pressure plate 4 when wear is confirmed up to the side surface 4c of b, the product can be used reliably up to its usage limit.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a clutch device equipped with a pressure plate according to the present invention, and FIG. 2 is a view taken along the - arrow in FIG. 1; Flywheel, 2; Clutch disc,
2a, 2b: clutch facing, 4: pressure plate, 4a: friction surface, 4b: wear allowance display groove, 7: clutch spring, 8: flywheel housing, 8a: inspection window, 9: clutch housing.

Claims (1)

[Scope of utility model registration request] a flywheel fixed to the crankshaft of the engine; a clutch disk disposed opposite the flywheel and spline-fitted to the transmission input shaft; and a clutch disk disposed opposite the clutch disk. In a clutch device consisting of a pressure plate that presses a facing against a flywheel, the friction surface of the pressure plate facing the clutch facing is provided with a wear allowance indicating groove extending from its outer periphery to the contact portion with the clutch facing. A pressure plate of a clutch device characterized by being provided with a pressure plate.