JPS6084428A - Multi wetboard clutch or brake - Google Patents

Abstract

PURPOSE:To clutch/declutch reliably by arranging a belleville spring to be pressed between a piston and retaining plate between the retaining plate and clutch plate. CONSTITUTION:Under clutched state, a belleville spring 18 will hook to the innerdiameter section of clutch drum 10, and upon stoppage of said spring 18, the piston 12 is returned by the spring force 14 to the initial position to form a gap equal to the movement of piston 12 between a drive plate 24 and driven plate 26 thus to remove frictional force. Upon re-application of hydraulic pressure on the piston 12 under this state, the drive plate 24 and driven plate 26 are pressed between said spring 18 and piston 12 to produce frictional force thus to enable clutch/declutch even when smooth motion of belleville spring 18 is blocked.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a wet multi-disc clutch or brake.

(b) Prior art As a conventional wet multi-plate clutch, for example, Nissan Automatic 11
As shown in Figure 22 on page 18 of "2.V Preparation Manual (Revised Edition)" published by F Corporation in September 1972, a piston is fitted into the cylinder portion of the clutch drum. The piston is constantly receiving a return force from the spring. There is a snap ring on the clutch drum, and between the piston and the snap ring,
A disc spring, multiple clutch plates, and a retaining plate are arranged. The clutch plate is composed of a drive plate having splines on its inner periphery, and a driven plate 1 having splines on its outer diameter that engage with splines on the outer periphery of the clutch drum. The disc spring is located between the piston and the clutch play I. The disc spring is compressed when pressed by the piston, and has the effect of relaxing the engagement of the clutch plate 1.

However, in such conventional multi-disc clutches, the disc spring is placed between the piston and the clutch plate, so when the disc spring is compressed, for example, the outer diameter of the disc spring gets caught on the inner diameter of the clutch drum. There was a problem.

In other words, when hydraulic pressure is applied to the piston and the piston moves in the suppressing direction, it comes into close contact with the disc spring and is pushed by the snap ring, and the drive plate of the clutch plate and the driven play 1. are pushed toward each other, and the clutch is engaged. Next, when the hydraulic pressure is applied 1 no 1, the piston returns in the return direction by the force of the spring, or if the disc spring is caught on the inner diameter f% of the clutch drum, clutch play 1, beam tening play 1, etc. It is held in close contact with the disc spring. Therefore, even though the screws I and N have returned to their initial positions, a frictional force acts between the drive play and the driven play, and the clutch is not completely released. However, if the flange is not released, the vehicle may run unintentionally, or the automatic transmission may become jammed and damaged.

(C) Purpose of the Invention The present invention provides a method for preventing disc springs from moving smoothly even when they are not moving smoothly.
It is an object of the present invention to provide a wet multi-disc clutch or brake in which the clutch or brake is reliably released when the piston is returned to its initial position.

(d) Structure of the Invention The wet multi-plate flanch or brake disc according to the present invention is disposed between the retaining plate and the clutch plate.

(E) Embodiments Hereinafter, embodiments of the present invention will be described based on FIG. 1 of the accompanying drawings.

FIG. 1 shows a wet multi-plate flanch that is one embodiment of the present invention. Piston 1 in cylinder S++ of Franchitram 10
2 are fitted together. The piston 12 receives a returning force from the spring 14 in the right direction in FIG.

Flanch drum 10 has snap ring 16 or 1
A plurality of clutch plates 20, retaining plates 22, and disc springs 18 are arranged between the piston 12 and the snap ring 16. The clutch plates 1 and 20 are composed of a drive plate 24 having splines on its inner circumference, and a driven plate 26 having splines on its outer circumference that engage with splines on the outer circumference 81 of the flanch drum 10. . The countersunk plate 18 includes the retaining plays 1 and 22 and the flange plate 20.
is located between.

Next, the operation of this embodiment will be explained. If the disk spring 18 moves smoothly without any problems such as getting caught on the inner diameter of the clutch drum 10, the same effect as in the conventional case can be obtained. That is, when hydraulic pressure acts on the piston 12 and the piston 12 moves to the left, the disc spring 18 is compressed while acting as a buffer, and the clutch play 1.
The drive plate 24 of No. 20 and the driven plate No. 2 are pressed against Il, and the clutch is engaged. When the hydraulic pressure acting on the piston 12 is removed, the piston 12 is pushed back by the spring 14 and the countersunk 18
is released from the pressure 1d-shaped fu', and the frictional force between the I-live plate 24 and the driven plate 26 is also removed, and the flange is released. If the disc spring 18 is caught on the inner diameter of the flanch drum 10 and does not move when the flange is fastened, when the piston 12 is returned to the initial position by the force of the spring 4, the drive play I・24 and driven plate 26
Frictional force no longer acts between them. This is because, even if the disc 18 is compressed and does not move, when the piston 12 moves to the right in the winter diagram, the distance between the drive plate 24 and the driven plate 26 is equal to the amount of movement of the piston 12. This is because a gap is formed. When hydraulic pressure is applied to the piston 12 again in this state, the drive plate i.24 and the driven plate 26
and the piston 12 to generate frictional force. However, when fastening in this case, the shock-reducing effect of the disc spring 18 does not work. As a result, even if the smooth movement of the disc spring 18 is impaired, the flange can be tightened and released.

The above explanation is for the case of wet multi-plate flanch1]
However, the difference between a wet multi-disc clutch and a wet multi-disc brake is whether the clutch drum rotates or is fixed, so the present invention can be applied to wet multi-disc brakes as well. is clear.

(f) As described in detail, according to the present invention, a plurality of flange plates and In wet-type multi-plate clutches or brakes that use spring pressure, the disc spring is disposed between the retaining plate and the clutch plate, so even if the disc spring does not move smoothly in the axial direction, , the clutch can be engaged and released, and damage to the automatic transmission can be prevented.

[Brief explanation of the drawing]

FIG. 1 is 1Δ showing a wet type multi-disc clutch according to the present invention. 10... Franch drum, 12, housing, piston, 14
・・φ spring, 16--・Snap spring, 18
・・・Disc spring, 20・Φ・Kura・Sochi plate, 22・
・・Retaining plate, 24・・・Drive play I・, 26・・1ζl Novunbrae I-0 Patent applicant: Nissan Motor Co., Ltd. Patent attorney: Miyauchi M11 I1 1st

Claims (1)

[Claims] A screw that is inserted into the sling and moves in the axial direction! In a wet multi-plate clutch or brake that presses a plurality of clutch plates and disc springs between a retaining plate and a retaining plate whose axial position is specified, the disc spring is A wet multi-disc clutch or brake, characterized in that the wet multi-disc clutch or brake is arranged between.