JP2009068647A - Hydraulic oil passage structure of wet clutch pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a hydraulic oil passage of a wet clutch pack. <P>SOLUTION: In the wet clutch pack 10 composed by housing a multiple-disc clutch operated by hydraulic pistons 46 and 48 between a front cover 12 arranged at an engine side and a rear cover 14 arranged at a gear box side, hydraulic oil passages 16 and 60 for supplying and discharging the hydraulic oil to the hydraulic pistons 46 and 48 of the multiple-disc clutch are composed of three members such as a sleeve member 22, a slit formation member 24 and a port formation member 20 superposed in an outside direction from a radial center. Thereby, the need of complicated metal processing treatment for forming the hydraulic oil passages 16 and 60 is obviated, and the manufacturing cost is reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hydraulic oil passage structure of a wet clutch pack used in a vehicle transmission or the like.

As an example of the hydraulic oil passage structure of a conventional wet clutch pack, there is a wet clutch pack to which the hydraulic oil passage structure of Japanese Patent Application Laid-Open No. 2005-133937 is applied.
JP 2005-133937 A

Here, FIG. 7 shows the upper half of the center line of the sectional view along the drive shaft of this wet clutch pack 10 ′, and an exploded sectional view of the main part. FIG. 8 is a perspective view of the sleeve member 22 ′. It is.
The hydraulic oil passage 16 'of the wet clutch pack 10' is fitted with two constituent members: a support hub member 20 'having ports 18'a and 18'b and a sleeve member 22' having a slit 26 '. It is a structure formed by being integrated. That is, a slit 26 'is formed in the sleeve member 22'.

  However, in such a structure, it is difficult to provide the slits 26 'by press molding, so that the processing method becomes complicated, resulting in an increase in manufacturing cost.

Therefore, the present invention provides a wet clutch pack in which a multi-plate clutch operated by a hydraulic piston is housed between a front cover disposed on the engine side and a rear cover disposed on the gear box side.
The hydraulic oil passage for supplying and discharging hydraulic oil to and from the hydraulic piston of the multi-plate clutch is composed of three members, a sleeve member, a slit forming member, and a port forming member, which are stacked outward from the radial center. This problem has been solved by the hydraulic oil passage structure of the wet clutch pack.

  According to the present invention, the hydraulic oil passage of the wet clutch pack is configured by three members, a sleeve member, a slit forming member, and a port forming member, which are stacked outward from the radial center. Complex metal processing for forming the hydraulic oil passage is not necessary, and the manufacturing cost can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
1 and 2 show an upper half of a center line of a sectional view along a drive shaft of a wet dual clutch pack to which the present invention is applied, and an exploded sectional view of a main part. FIG. 1 shows a first hydraulic oil passage. FIG. 2 shows the second hydraulic oil passages, respectively. 3A and 3B are diagrams showing a slit forming member. FIG. 3A is a diagram showing a state before a slit is formed and cylindrical, FIG. 3B is a radial sectional view after being made cylindrical, and FIG. ) Is a cross-sectional view taken along the line cc of FIG. 3B, FIG. 4 is a perspective view of a cylindrical slit forming member, and FIG. 5 is a port forming member in the second hydraulic oil passage. FIG. 6 is a diagram showing a torque transmission path, in which the slit forming member is fitted and integrated in the radial direction.

  First, a schematic structure of the wet dual clutch pack 10 to which the hydraulic oil passage of the present invention is applied and a torque transmission path will be described.

In the wet dual clutch pack 10 of FIGS. 1 and 2, the outer peripheral side of the front cover 12 is fixed to the rear cover 14 via the snap ring 40 so as not to open in the axial direction at the right end of the stepped cup-shaped rear cover 14. Yes.
The multi-plate first clutch K1 operated by the first hydraulic piston 46 is radially outward, and the multi-plate second clutch K2 operated by the second hydraulic piston 48 is radially inward of the inner drum 50. Each is arranged.

The first clutch K1 includes a friction plate 44 that is spline-fitted to the first hub 52 and a mating plate 42 that is spline-fitted to the rear cover 14, and the friction plate 44 and the mating plate 42 are disposed inside the rear cover 14. A first hydraulic piston 46 is provided in pressure contact with each other.
Similarly to the first clutch K 1, the second clutch K 2 includes a friction plate 44 that is spline-fitted to the second hub 54 and a mating plate 42 that is spline-fitted to the inner drum 50. Two hydraulic pistons 48 are provided.

In FIG. 1, the hydraulic oil for engaging / disengaging the first clutch K1 passes through the first hydraulic oil passage 16 including the first slit 26 and the first ports 18a and 18b to the first oil chamber 56. , The first hydraulic piston 46 is moved in the right direction in FIG. 1, and the friction plate 44 of the first clutch K1 and the mating plate 42 are brought into pressure contact to be frictionally engaged.
Further, in FIG. 2, the hydraulic oil for engaging / disengaging the second clutch K2 passes through the second hydraulic oil passage 60 including the second slit 36 and the second ports 28a and 28b to the second oil chamber 58. , The second hydraulic piston 48 is moved in the right direction in FIG. 2, and the friction plate 44 of the second clutch K2 and the mating plate 42 are brought into pressure contact to be frictionally engaged.
Which one of the first clutch K1 and the second clutch K2 is operated is controlled by a hydraulic circuit including a hydraulic motor, a control valve, and the like (not shown).
Then, torque is transmitted through a predetermined path when the clutch is engaged as described above.

In the wet dual clutch pack 10 of FIGS. 1 and 2, the torque transmission path is as shown in FIG.
First, as shown in FIG. 6A, the K1 torque transmission takes a route of K1 torque input → front cover 12 → rear cover 14 → first hub 52 → K1 torque output. Next, as shown in FIG. 6B, the K2 torque transmission takes a path of K2 torque input → front cover 12 → rear cover 14 → inner drum 50 → second hub 54 → K2 torque output.

In the wet dual clutch pack, different torque transmission paths can be obtained according to the two types of clutches used, so multiple shifts can be made from the start by simply switching gears without using a torque converter. There are features that are possible.
In the embodiment of the present invention, the wet dual clutch pack is used. However, the hydraulic oil passage structure of the present invention may be any form as long as it is a hydraulic clutch pack such as a wet clutch pack having only one clutch. Of course, the present invention can also be implemented in other clutch packs.

Next, the first hydraulic oil passage 16 and the second hydraulic oil passage 60 will be described.
The wet clutch pack 10 of the present invention includes three members, that is, a sleeve member 22, a slit forming member 24, and a port forming member 20 that are arranged at the radial center of the rear cover 14.
The first hydraulic oil passage 16 is formed by these three members. That is, the sleeve member 22, the slit forming member 24 including the first slit 26, and the first oil chamber 56 for engaging / disengaging the first clutch K1 from the radial center to the outward direction. The first hydraulic fluid passage 16 including the first slit 26 and the first ports 18a and 18b is formed by sequentially fitting and integrating the port forming members 20 having the first ports 18a and 18b to be connected. (See FIG. 1).
Similarly, the second hydraulic oil passage 60 is formed by the second slit 36 and second ports 28a and 28b connected to the second oil chamber 58 for engaging / disengaging the second clutch K2 (FIG. 2). reference.).

  Next, a processing procedure of the slit forming member 24 will be described. First, as shown in FIG. 3A, a straight metal plate is pressed to form a first slit 26 and a second slit 36. This processing is characterized in that it can be performed by die press molding capable of mass production. Next, this metal plate is processed into a cylindrical shape so as to match the inner peripheral surface of the port forming member 20 (see FIG. 3B). The slit forming member 24 processed into a cylindrical shape is provided with a chipped portion 30 (see FIGS. 3B and 3C).

The first slit 26 provided in the cylindrical slit forming member 24 is provided in the first oil holes 18 a and 18 b provided in the port forming member 20, and the second slit 36 is provided in the port forming member 20. The slit forming member 24 is press-fitted into the port forming member 20 so as to match the second oil holes 28a and 28b (see FIG. 5). At this time, as shown in FIG. 5, the fitting convex portion 32 provided on the inner peripheral side of the port forming member 20 is fitted into the chipped portion 30 of the slit forming member 24. Thereby, the slit forming member 24 and the port forming member 20 do not rotate relative to each other.
Further, due to the elastic repulsive force of the cylindrical slit forming member 24, the outer peripheral surface of the slit forming member 24 is pressed against the inner peripheral surface of the port forming member 20, so that the slit forming member 24 and the port forming member 20 are in the drive axis direction. Does not move relative to
The outer periphery of the port forming member 20 shown in FIG. 5 is shown as a circle for convenience of explanation.

  Next, the sleeve member 22 is press-fitted into the slit forming member 24 by an interference fit, so that the three members of the port forming member 20, the slit forming member 24, and the sleeve member 22 are integrally fixed, and the first slit 26. The first hydraulic oil passage 16 including the first ports 18a and 18b and the second hydraulic oil passage 60 including the second slit 36 and the second ports 28a and 28b are formed.

  As described above, in the present invention, the hydraulic oil passage is composed of three members, the sleeve member, the slit forming member, and the port forming member, which are stacked outward from the radial center, and the sleeve member 22; Since the slit forming member 24 is an independent member, the slit forming member 24 can be pressed to form the first slit 26 and the second slit 36, thereby reducing processing costs. However, the same function as the conventional one can be realized.

  Although the embodiment in which the first and second hydraulic oil passages are provided in the slit forming member has been described, the third hydraulic oil passage for lubricating and cooling the multi-plate clutch may be provided in the same manner. it can.

The thing which showed the upper half of the centerline of sectional drawing along the drive shaft of the wet clutch pack to which this invention is applied, and the principal part decomposition | disassembly enlarged sectional view. The thing which showed the upper half of the centerline of sectional drawing along the drive shaft of the wet clutch pack to which this invention is applied, and the principal part decomposition | disassembly enlarged sectional view. It is a figure which shows a slit formation member, (a) is a top view of a slit formation member, (b) is radial direction sectional drawing after making it cylindrical, (c) is cc line of FIG.2 (b). Sectional drawing along a drive shaft. The perspective view of the slit formation member made cylindrical. The radial direction sectional view in the state where the port formation member and slit formation member in the 2nd operation oil passage were integrated. The figure which shows the torque transmission path | route in this invention. The upper half of the center line of the sectional view along the drive shaft of the conventional wet clutch pack is shown, and the main part exploded enlarged sectional view. The perspective view of the sleeve member of the conventional wet clutch pack.

Explanation of symbols

10: Wet clutch pack 12: Front cover 14: Rear cover 16: First hydraulic oil passage 18a, 18b: First port 20: Port forming member 22: Sleeve member 24: Slit forming member 26: First slit 28a, 28b: First 2 port 30: chipped portion 32: convex portion for fitting 36: second slit 46, 48: hydraulic piston 60: second hydraulic oil passage

Claims (3)

In a wet clutch pack containing a multi-plate clutch operated by a hydraulic piston between a front cover arranged on the engine side and a rear cover arranged on the gear box side,
The hydraulic oil passage for supplying and discharging hydraulic oil to and from the hydraulic piston of the multi-plate clutch is composed of three members, a sleeve member, a slit forming member, and a port forming member, which are stacked outward from the radial center. It is characterized by
Hydraulic oil passage structure for wet clutch pack.   2. The hydraulic oil passage structure of a wet clutch pack according to claim 1, wherein the slit forming member is formed by forming a slit in a metal plate by pressing, and then forming the metal plate into a cylindrical shape.   The hydraulic oil passage of the wet clutch pack according to claim 1 or 2, wherein the slit forming member includes a chipped portion, the port forming member includes a fitting convex portion, and the fitting convex portion is fitted to the chipped portion. Construction.

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