JPH085380Y2 - Hydraulic clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a hydraulic clutch of an automobile.

<Prior Art> A conventional hydraulic clutch has a configuration shown in FIGS. 3 and 4. That is, 1 is the engine crankshaft, 2
Is an input shaft, and a clutch disc 3 is spline-connected to the input shaft 2 via a disc hub 30. Reference numeral 6 denotes a clutch cover which is hermetically disposed on the input shaft 2 and is constituted by integrally connecting a front cover 6a and a rear cover 6b. The clutch disc 3 is disposed in the clutch cover 6, and a piston 11 for pressing the clutch disc 3 against the clutch cover 6 is provided. Reference numeral 10 is a cylinder that slidably holds the piston 11.

Reference numeral 4 is a flex plate fixed to the crankshaft 1, and a ring gear 5 connected to a starter motor is attached to the outer diameter end of the flex plate 4. The flex plate 4 is connected to the clutch cover 6, and the power of the crankshaft 1 is transmitted.

Reference numeral 20 denotes a contact plate, which engages with a spline 21 provided on the inner peripheral surface of the clutch cover 6 between the clutch disc 3 and the piston 11, and is arranged so as to be movable only in the axial direction.

13 is an oil pump and 14 is a control valve. This control valve 14 has an oil passage 15 in the rear chamber of the piston 11.
The pressure oil PC1 is supplied through the clutch cover 6
The pressure oil PC2 is supplied to the internal space 17 from the oil passage 18 through the gap of the spline 21 and returned to the oil pump 13. As shown in FIG. 3, as shown in FIG. To move the contact plate 20 into contact with the clutch disc 3 and apply the pressing force of the piston 11 to the clutch disc 3 evenly to press the clutch disc 3 against the clutch cover 6 to connect the clutch. , Pressure oil PC1
By lowering the pressure, the pressure oil PC2 constantly circulated and supplied to the space 17 in the clutch cover 6 pushes the piston 11 in the backward direction to disengage the clutch.

<Problems to be Solved by the Invention> In the above-mentioned prior art, when the supply of the pressure oil PC1 is cut off and the clutch is disengaged from the clutch connection state of FIG. 3, the piston 11 surely retracts with the pressure oil PC2. The abutment plate 20 receives the pressure of the pressure oil PC2 supplied from the oil passage 18 and comes into a state of abutting on the clutch disc 3 as shown in FIG. 4, which may result in defective clutch disconnection.

<Means for Solving the Problems> The present invention has been made to solve the above-mentioned problems, and a front cover and a rear cover are integrally connected to each other, and a clutch cover fixed to a crankshaft of an engine is provided. The clutch disc spline-fitted to the input shaft via the disc hub, the hydraulic piston that presses the clutch disc in the clutch connecting direction, and the spline on the inner peripheral surface of the clutch cover between the hydraulic piston and the clutch disc. A hydraulic clutch comprising an abutment plate that is engaged and arranged to be movable only in the axial direction, and that constantly supplies pressure oil that presses the hydraulic piston in the clutch disengagement direction into the clutch cover. The piston and the abutment plate are connected via a strap plate, and the rear cover and the disc housing are connected. A leaf spring for pulling the clutch disc from the front cover side to the rear cover side for urging the clutch disc is provided between the plate spring and the clutch.

<Operation> With the above configuration, the contact plate is always moved integrally with the forward / backward movement of the hydraulic piston by the strap plate to surely retreat / return the contact plate, and the clutch disc is moved to the proper position by the biasing force of the leaf spring. It is pulled away from the front cover side to the rear cover side.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. First
The drawings show the essential parts of the present invention, and the overall structure of the hydraulic clutch is the same as in FIG.

In the present invention, as shown in FIG. 1, a strap plate 23 connects the piston 11 and the contact plate 20. Furthermore, to explain the details of this connection structure, one end of the strap plate 23 is connected to the piston 11 by a pin 24, and the other end of the strap plate 23 is provided with a gap in the contact plate 20 in the axial direction and the circumferential direction. It is a structure that is connected to the pin 25 that is attached.

Further, according to the present invention, one end of the leaf spring 40 is fixed to the rear cover 6b with a set screw 41, and the other end of the leaf spring 40 is attached to the disc hub.
The structure is engaged with 30. This leaf spring 40 is a disk hub
It has the urging force of the ammunition that always pushes 30 toward the rear cover 6b.

Since the present invention has the structure described above, the contact plate
20 moves back and forth integrally with the piston 11 via the strap plate 23. Therefore, as shown in FIG. 3, when the abutment plate 20 abuts on the clutch disc 3 to cut off the supply of the hydraulic pressure PC1 to the cylinder 10 from the clutch connected state to disconnect the clutch, the backward moving force of the piston 11 is It is transmitted to the contact plate 20 via the strap plate 23, and the contact plate 20 is forcibly moved away from the clutch disc 3 to move backward. In addition, when the contact plate 20 separates from the clutch disc 3, the plate spring 40 causes the disc hub 30 to move backward, so that the clutch disc 3 is separated from the front cover 6a side to the rear cover 6b side. It is held at a proper neutral position with the front cover 6a. Therefore, the clutch can be disengaged quickly and satisfactorily. The gap between the pin 25 and the contact plate 20 in the axial direction and the circumferential direction absorbs a processing error and a phase shift of the spline 21.

<Effect of the Invention> As described above, according to the present invention, the clutch in which the front cover and the rear cover are integrally coupled and the input shaft is spline-fitted via the disc hub in the clutch cover fixed to the crankshaft of the engine A disc, a hydraulic piston for pressing the clutch disc in the clutch connecting direction, and a contact arranged between the hydraulic piston and the clutch disc by spline engagement with the inner peripheral surface of the clutch cover so as to be movable only in the axial direction. In a hydraulic clutch that includes a contact plate and constantly supplies pressure oil that presses the hydraulic piston in the clutch disengagement direction in the clutch cover, the hydraulic piston and the contact plate are connected via a strap plate, The front cover of the clutch disc is provided between the rear cover and the disc hub. Since a leaf spring that biases the side to the rear cover side is provided, the abutment plate always moves forward and backward together with the hydraulic piston, and the abutment plate surely moves backward by the hydraulic piston retreating operation when the clutch is disengaged. Moreover, since the clutch disc is pulled away from the front cover side to the rear cover side by the leaf spring and held at the proper neutral position, it is reliably separated from the clutch disc, and there is an advantage of preventing the clutch disengagement failure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an essential part of the present invention, FIG. 2 is a front view of a leaf spring, FIG. 3 is a sectional view of a conventional hydraulic clutch in a clutch connected state, and FIG. 4 is the same. It is sectional drawing of a clutch disengaged state. 1 ... Crank shaft, 2 ... Input shaft, 3 ... Clutch disc, 6 ... Clutch cover, 11 ... Piston,
13 …… oil pump, 14 …… control valve, 20…
… Abutment plate, 21 …… Spline, 23 …… Strap plate, 30 …… Disk hub, 40 …… Leaf spring.

Claims (1)

[Scope of utility model registration request] 1. A clutch disc in which a front cover and a rear cover are integrally coupled, and a clutch disc fixed to the crankshaft of an engine is spline-fitted to an input shaft via a disc hub, and the clutch disc is clutch-connected. A hydraulic piston that presses in the direction, and a contact plate that is arranged between the hydraulic piston and the clutch disc on the inner peripheral surface of the clutch cover by spline engagement so as to be movable only in the axial direction. In a hydraulic clutch that constantly circulates pressure oil that presses the hydraulic piston in the clutch disengagement direction, the hydraulic piston and the contact plate are connected via a strap plate, and between the rear cover and the disc hub. Separate the clutch disc from the front cover side to the rear cover side Hydraulic clutch, characterized in that a leaf spring for.