JPH03189424A - Hydraulic clutch - Google Patents

Abstract

PURPOSE:To improve the performance of clutch disengagement by dividing an input shaft for spline connection, integrating a clutch disc with the input shaft and providing a restriction member between a clutch cover and the input shaft for permitting a motion in a rotational direction but restricting a motion in an axial direction. CONSTITUTION:An input shaft is divided into an input shaft 2a for the side of a clutch disc 3 and another input shaft 2b for the side of a transmission, and both input shafts 2a and 2b are connected to each other with a spline 2c, thereby integrating the clutch disc 3 with the input shaft 2a. Furthermore, a bearing 30 is provided between the forward position of a clutch cover 6 and the input shaft 2a integral with the clutch disc 3, while a restriction member 40 is provided between the aft position of the clutch cover 6 and the input shaft 2a integral with the clutch disc 3 for permitting a motion in a rotational direction but restricting a motion in an axial direction. According to the aforesaid construction, the clutch disc 3 can be smoothly disengaged from the clutch cover 6 due to the differential pressure of hydraulic pressure PC2 within the clutch cover 6 and the atmospheric pressure outside the clutch cover 6.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to an oil-based clutch for an automobile.

<Conventional technology> A clutch disc mounted on the input shaft of a flywheel fixed to the engine's crankshaft is pressed in the direction of clutch engagement by a hydraulically actuated piston mounted on the back of the flywheel, and the spring force A hydraulic clutch in which a clutch disc is biased in the direction of clutch disengagement is known, for example, from Japanese Utility Model Application No. 59-88524.

In the above-mentioned hydraulic clutch, a hydraulically actuated piston is used to engage the clutch, but a spring is used to disengage the clutch, so there is a problem in the responsiveness of clutch engagement and disengagement.

Further, the above-mentioned hydraulic clutch is of a so-called dry type, and requires measures to prevent wear of the latch disk since it is repeatedly and severely pressed by a hydraulic piston.

In order to improve these problems, the inside of the clutch cover in which the clutch disc and hydraulic piston are installed is sealed, and oil at a predetermined pressure supplied from an oil pump is circulated within this sealed space. A hydraulic clutch is provided in which pressure oil always acts on a hydraulic piston in a backward direction to disengage the clutch, and a hydraulic pressure higher than the oil pressure in the sealed space is applied to the hydraulic piston to connect the clutch. .

<Problems to be Solved by the Invention> In the wet hydraulic clutch in which the latch cover is filled with pressure oil as described above, the lubricating effect of the clutch disc by the pressure oil is improved, but the clutch disc is not pressed. Even if the piston leaks, the clutch disc remains in the clutch cover, causing problems with clutch disengagement performance.

Means for Solving Problems> The present invention has been made to improve the above-mentioned problems, and a ring gear is provided on the flex plate fixed to the crank shirt of the engine. It has a ring gear that meshes with the ring gear, and a clutch disc and a hydraulic piston that presses the clutch disc in the clutch connecting direction are installed in the clutch cover.
Eh, declutch the hydraulic piston inside the clutch cover r4I! In a hydraulic clutch that constantly supplies pressure oil for pressing in the L direction, the human power shaft is divided into a clutch disk side and a transmission side and spline-coupled, and the clutch disk is integrated with the input shaft on the clutch disk side. A bearing is interposed between the front position of the clutch cover and the input shaft on the clutch disc side, and the rotation direction is allowed between the rear position of the clutch cover and the input shaft on the clutch disc side, but the axial direction is allowed. A regulating member is inserted.

[Operation]: With the configuration described above, the clutch disc is reliably separated from the clutch cover due to the differential pressure between the pressure of the pressure oil inside the clutch cover and the atmospheric pressure outside the clutch cover.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. The figure shows the overall configuration of a hydraulic clutch, where 1 is the engine crankshaft, 2a and 2b are input shafts, and this input shaft 2a
, 2b is clutch disc 3Il! It is divided into an input shaft 2a on the transmission side and an input shaft 2b on the transmission side, and both input shafts 2a and 2b are connected by a spline 2C. The clutch disc 3 is constructed integrally with one input shaft 2a.

Reference numeral 6 denotes a clutch cover that is arranged in a sealed manner on the input shaft 2a. The clutch disc 3 is disposed within the clutch cover 6, and a piston 11 for pressing the clutch disc 3 against the clutch cover 6 is also provided. 10 is a cylinder that slidably holds the piston 11, and 12 is a rotation preventing member that allows the piston 11 to slide and restricts the rotation direction.

A flex plate 4 is fixed to the crankshaft 1, and a ring galley connected to a starter motor is attached to the outer diameter end of the flex plate. A ring gear 7 for power transmission is fixed to the flex plate 4, and a ring gear 8 that meshes with the ring gear 7 is fixed to the outer surface of the clutch cover 6.

13 is an oil pump, and 14 is a control pulp.

This control valve 14 includes boats 1 to 16 that supply pressure oil pc1 to the rear chamber of the piston 11 via an oil passage 15, a boat 19 that supplies pressure oil pc2 to a space 17 in the clutch cover 6, and a boat 19 that supplies pressure oil pc2 to a space 17 in the clutch cover 6. It has a boat 20 that returns the pressure oil PC2 inside to the oil pump 13 through an oil passage 18 through a gap between the front surface of the piston 11 and the clutch disc 3.

Further, a bearing 3 is provided between the front position of the clutch cover 6 and the input shaft 2a integrated with the clutch disc 3.
0 is interposed therein, and a regulating member 40 is interposed between the rear position of the clutch cover 6 and the manpower shaft 2a integrated with the clutch disc 3, which allows the direction of rotation but restricts the direction of rotation. .

This regulating member 40 is suitably made of, for example, a thrust bearing or metal.

In the hydraulic clutch configured as described above, the rotational power of the crankshaft 1 is transmitted to the clutch cover 6 via the flexible screw plate 4 and the ring gear 7.8.

On the other hand, the pressure oil ρC2 from the oil pump 13 is supplied to the space 17 inside the clutch cover 6 from the photo 19, and
The interior is filled with pressure oil pc2 at a predetermined pressure. The oil then passes through the gap between the front surface of the piston 11 and the clutch disk 3 and returns to the boat 20 via the oil passage 18, thereby performing a circulating action. The piston 11 is always pushed in the backward direction away from the clutch disc 3 by this pressure oil pc2, thereby performing a clutch disengagement action.

In this state, to connect the clutch, pressure oil pC1 is supplied from the boat 16 to the back surface of the piston 11 via the oil passage 15. This pressure oil pc1 has a higher pressure than the pressure oil pc2, so that the piston 11 overcomes the pressing force of the pressure oil pc2 and moves forward, pressing the clutch disc 3 against the clutch cover 6 and closing the clutch cover 6 (public). The rotational power of the engine being reached is transmitted to the input shafts 2a, 2b via the clutch disc 3.

Therefore, in the present invention, the clutch disc 3 is integrated with the input shaft 2a that is divided in the axial direction from the human power shaft 2b on the transmission side, and the clutch cover 6 is provided with an input shaft 2a at its front and rear positions by means of a bearing 30 and a regulating member 40. Axis 2a
Since the clutch disk 3 is coupled to allow only the rotational direction, the clutch disk 3 is smoothly retracted from the clutch cover 6 due to the differential pressure between the pressure oil pc2 inside the clutch cover 6 and the atmospheric pressure 50 outside the clutch cover 6.

<Effects of the Invention> As described above, according to the present invention, the input shaft is divided into the clutch disc side and the transmission side and connected by tin line, the clutch disc is integrated with the clutch disc side input shaft, and the clutch cover is A bearing is interposed between the front position and the input shaft on the clutch disc side, and a regulating member is interposed between the rear position of the clutch cover and the input shaft on the clutch disc side to allow rotational direction but restrict axial direction. This structure has the advantage that the clutch disc can be smoothly and reliably separated from the clutch cover, improving the clutch disengagement performance of this type of hydraulic clutch.

[Brief explanation of drawings]

1 is a sectional view of the main part of the present invention. l...crankshaft, 2a, 2b...human power shaft,
2C...Spline, 3...Clutch disc, 4
a, 4b...Flex grade, 6...Clutch cover 11...Piston, 13...Oil pump, 1
4... Control pulp, 30... Bearing 4
0...Regulation member, 50...Atmospheric pressure.

Claims (1)

[Claims] A ring gear is provided on a flex plate fixed to the crankshaft of the engine, a clutch cover has a ring gear that meshes with the ring gear, and a clutch disc and a hydraulic piston that presses the clutch disc in the clutch connection direction are disposed within the clutch cover. In the hydraulic clutch, the input shaft is divided into a clutch disc side and a transmission side and spline-coupled to each other, and the input shaft is divided into a clutch disc side and a transmission side, and the clutch cover is constantly circulated and supplied with pressure oil that presses the hydraulic piston in the clutch disengagement direction. The disc is integrated with the input shaft on the clutch disc side,
A bearing is interposed between the front position of the clutch cover and the input shaft on the clutch disc side, and the rotational direction is permitted but the axial direction is restricted between the rear position of the clutch cover and the input shaft on the clutch disc side. A hydraulic clutch characterized by having an interposed member.