JPH10311350A - Hydraulic clutch disconnecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic clutch disconnecting device wherein a seal member for an annular piston can be surely fixed. SOLUTION: In a hydraulic clutch disconnecting device, a seal member 5 is formed with a ring member 6 of U-shaped section comprising a radial direction flange 6a and axial direction flanges 6b, 6c extended from an internal/ external peripheral part of this radial direction flange 6a and a packing member 7 fixed to a radial direction flange surface in an opposite side to the axial direction flanges 6b, 6c of the ring member 6 to have a lip 7a, 7b in the internal/ external periphery. In an end part internal/external peripheral surface of an annular piston 4 positioned inside an annular cylinder part 3, recessed stepped parts 4a, 4b having a radial direction depth larger than thickness of each axial direction flange 6a, 6b of the ring member 6 are formed, and in the recessed stepped parts 4a, 4b, the axial direction flanges 6a, 6b of the ring member 6 are fixedly fitted, the internal/external peripheral lips 7a, 7b of the packing member 7 are brought into slide contact with an internal/external peripheral surface of the annular cylinder part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hydraulic clutch disconnection device.

[0002]

2. Description of the Related Art FIG. 2 shows a known hydraulic clutch disconnection device of this type. In FIG. 3, reference numeral 21 denotes an annular cylinder portion provided on the outer periphery of the clutch main shaft 20, which is formed by an inner cylinder member 23 having radial mounting surfaces 23a and 24a with respect to the clutch housing 22, and an outer cylinder member 24, respectively. Cylinder space 2 between both cylinder members 23 and 24
An annular piston 25 is fitted into 1a so as to be slidable in the axial direction. At the end of the piston 25 in the cylinder space 21a, a seal member 35 for sealing the cylinder space 21a is mounted in a structure described later. The inner cylinder member 2
3 to the clutch housing 22 in the radial mounting portion 2
3b is fixed to a stepped portion 24c formed on a radial mounting portion 24a of the outer cylinder member 24 with respect to the clutch housing 22 with a bolt (not shown). Also, a stepped portion 23c is formed on a radial mounting surface 23a of the inner cylinder member 23 with respect to the clutch housing 22,
The clutch housing 22 is fitted with the stepped portion 22a.

Further, the piston 25 is formed of a synthetic resin, and a plate plate 26 is erected at a tip 25a thereof and is integrally formed. The end of the plate 26 is bent 26b in the axial direction, and the tip is bent 26c inward in the radial direction. A release bearing 27 is disposed inside the plate plate 26, and the end surface of the outer ring 27 a is formed between the outer ring 27 a and a bent portion 26 c at the tip end of the plate plate 26 by a wave spring 28. Is pressed against. Outer ring 27a
A radial gap 29 is provided between the outer peripheral surface and the inner surface of the axial portion 26b of the plate 26 so that the release bearing 27 can be radially aligned. The inner ring 27b of the release bearing 27 is always in contact with a clutch lever (not shown) and is rotated.

A guide flange 34, which is guided on the outer surface of the outer cylinder member 24, is press-fitted on a side surface of the radial portion 26a of the plate plate 26 on the side opposite to the release bearing. Fixed.
Further, the side surface of the guide flange 34 and the outer cylinder member 2
The compression spring 30 is disposed between the four radial mounting portions 24b. Due to this compression spring 30, the inner ring 27b of the release bearing 27 is always brought into contact with the clutch lever.
Reference numeral 31 denotes a boot which is arranged between the outer cylinder member 24 and the plate plate 26 and seals the cylinder portion 21.

A port 32 for introducing hydraulic oil pressure-fed from a clutch master cylinder (not shown) and an oil passage 33 opening to the cylinder 21 are formed in the radial mounting portion 24b of the outer cylinder member 24. I have. From the clutch master cylinder to the cylinder 2
By controlling the pressure of the hydraulic oil to the clutch 1, the pressing force of the inner ring 27 b of the release bearing 27 against the clutch lever is adjusted so as to connect and disconnect the clutch.

Further, a seal member 35 fixed to the annular piston 25 is fixed as shown in FIG.
That is, a dovetail-shaped annular concave portion 37 is formed on the end surface 36 of the annular piston 25 and extends inward, and a bulging projection 38 formed on the end surface of the seal member 35 is press-fitted and fixed in the annular concave portion 37. A lip formed on the inner and outer circumferences of the cylinder 35 is brought into sliding contact with the inner and outer peripheral surfaces of the cylinder 21 so that the cylinder 21 is sealed.

[0007]

In the above-mentioned conventional structure, the annular piston 25 is formed of a synthetic resin, and the annular recess 37 in the end face 36 of the annular piston 25 is formed.
Is molded at the same time as the annular piston 25 is molded,
Due to the structure of the mold, the dimensional difference between the radial dimension A of the opening 37a of the annular concave portion 37 and the radial dimension B of the inner deep portion 37b cannot be made large. Therefore, the bulging protrusion 37 of the sealing member 35
It is difficult to secure a sufficient fixing force against disengagement after press-fitting, and sufficient management is required for fitting and fixing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a hydraulic clutch disconnection device that can securely fix a seal member to an annular piston.

[0009]

As means for solving the above-mentioned problems, in the first aspect, an inner cylinder member and an outer cylinder member each having a radial direction with respect to a clutch housing are formed on an outer periphery of a clutch main shaft. An annular cylinder portion provided, a release bearing fitted axially movably on the outer peripheral side of the inner cylinder member, and a composite which is fitted into the annular cylinder portion and acts on the release bearing with hydraulic pressure to intermittently operate the clutch. A resin-made annular piston, a seal member fixed to the inner end of the annular piston inside the annular cylinder portion and having a lip sliding on the inner and outer peripheral surfaces of the annular cylinder portion, and a release bearing disposed between the release bearing and the outer cylinder member And a biasing means for biasing the hydraulic clutch disconnection device, The seal member is fixed to a U-shaped cross-section ring member composed of a radial flange and an axial flange extending from the inner and outer peripheral portions of the radial flange, and a radial flange surface of the ring member opposite to the axial flange. A recess formed by a packing member having a lip on the inner and outer circumferences and having a radial depth greater than the thickness of each axial flange of the ring member on the inner and outer circumferential surfaces of the end of the annular piston located inside the annular cylinder portion. A step is formed,
The axial flange of the ring member is fitted and fixed to the concave step portion, and the inner and outer peripheral lips of the packing member are slidably contacted with the inner and outer peripheral surfaces of the annular cylinder portion.

In the second aspect, the ring member is integrally formed, and a plurality of holes are formed on the radial flange along the circumference. A plurality of protrusions formed on the packing member are formed in the holes. At the same time, the protrusion is formed at the end of the protrusion with a bulge having a diameter larger than the diameter of the hole, and the bulge is fitted into a recess formed on the end surface of the annular piston.

Further, in the third aspect, the ring member is formed by being divided into upper and lower portions, and an annular projection formed on the packing member is clamped by the upper and lower divided portions, and the end of the projection is expanded. A protruding portion is formed, and the protruding portion is fitted into a concave portion formed on an end surface of the annular piston.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. Note that the basic configuration of the hydraulic clutch disconnection device is the same as the configuration of the conventional device described with reference to FIG. 3, and thus redundant description will be omitted, and only the essential parts of the present invention which are equivalent to FIG. 4 will be described. 1 and will be described.

An annular piston 4 made of synthetic resin is slidably fitted in an annular cylinder 3 formed of an inner cylinder member 1 and an outer cylinder member 2 in the axial direction.
Further, the seal member 5 includes a ring member 6 having a U-shaped cross section including a radial flange 6a and axial flanges 6b and 6c extending from inner and outer peripheral portions of the radial flange 6a, and ring members 6 and axial flanges 6b and 6c. Fixed to the side surface of the radial flange 6a on the opposite side to the lip 7a,
7b. The ring member 6 is integrally formed, and may be formed from a thin metal plate by press molding, or may be formed by injection molding of a synthetic resin. In addition, the annular piston 4
On the inner peripheral surface of the end located inside the annular cylinder 3, annular concave steps 4a, 4b having a radial depth greater than the thickness of each axial flange 6b, 6c of the ring member 6 are formed. The axial flanges 6b, 6c of the ring member 6 are press-fitted and fixed to the concave steps 4a, 4b. Since the ring member 6 is press-fitted and fixed to the concave step portion of the annular piston 4 from the inner and outer diameter sides, it is easy to obtain a press-fit balance,
The deformation of the annular piston 4 is prevented. After the ring member 6 is fixed, the outer peripheral surface of the axial flange 6b and the inner peripheral surface of the axial flange 6c of the ring member 6 have the above-mentioned dimensional relationship with the concave steps 4a, 4b. Do not touch Each lip 7 of the packing member 7
a and 7b contact the inner peripheral surface of the annular cylinder and seal the annular cylinder portion.

The radial flange 6a of the ring member 6
Has a plurality of through holes 8 formed on the circumference thereof.
A plurality of protrusions 9 formed on the side surface 7c of the packing member 7 opposite to the lips 7a and 7b are inserted therethrough, and the end of the protrusion 9 has a diameter larger than the opening size A of the hole 8. A bulging portion 10 of B is formed. That is, the bulging portion 1
0 is elastically deformed to allow the hole 8 of the ring member 6 to pass through,
After that, in order to restore the swelling portion 10 to its original size,
It becomes larger than the hole 8 and prevents the packing member 7 from coming off. An axial recess 11 having an inner peripheral surface and an outer peripheral surface parallel to the axis of the piston 4 is provided on the annular piston end surface 4c.
Is formed, and the bulging portion 10 is fitted. Since the concave portion 11 is not formed in a dovetail shape as in the related art, the processing is easy.

FIG. 2 shows another embodiment, in which the ring member 6 is vertically divided into two parts 12 and 13 at a substantially central portion of the radial flange 6a. The projection 9 of the packing member 7 is formed by an annular projection.
Are sandwiched between the two divided portions 12 and 13. Further, a plurality of bulges 10 are formed at the end of the annular protrusion 6 in an annular or circumferential manner. In this example,
Since the bulging portion can be made larger than that in FIG. 1, the packing member 7 can be more reliably prevented from coming off from the ring member 6.

[0016]

According to the present invention, since the bulging portion of the packing member is fixed to the ring member, the opening size of the ring member and the dimensional size of the bulging portion are not affected by the resin molding of the annular piston. And the packing member can be securely fixed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of another embodiment of the present invention.

FIG. 3 is a sectional view of a conventional hydraulic clutch disconnection device.

FIG. 4 is a sectional view of a main part of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer cylinder member 2 Inner cylinder member 3 Annular cylinder part 4 Annular piston 4a, 4b Annular concave stepped part 5 Seal member 6 Ring member 7 Packing member 8 Hole 9 Protrusion 10 Swelling part 11 Axial concave part 12, 13 Bipartite part

Claims (3)

[Claims] An annular cylinder portion formed of an inner cylinder member and an outer cylinder member each having a radial direction with respect to a clutch housing and provided on an outer periphery of a clutch main shaft, and axially movable to an outer peripheral side of the inner cylinder member. A fitted release bearing, a synthetic resin annular piston which is inserted into the annular cylinder portion and acts on the release bearing by hydraulic pressure to intermittently operate the clutch, and which is fixed to an end of the annular piston inside the annular cylinder portion; The hydraulic clutch shut-off device, comprising: a seal member having a lip slidingly contacting the inner and outer peripheral surfaces of the annular cylinder portion; and a biasing means disposed between the release bearing and the outer cylinder member to bias the release bearing. Extends from the radial flange and the inner and outer peripheries of this radial flange. A ring member having a U-shaped cross section composed of an axial flange and a packing member fixed to a radial flange surface opposite to the axial flange of the ring member and having a lip on the inner and outer circumferences are formed inside the annular cylinder portion. A concave step having a radial depth greater than the thickness of each axial flange of the ring member is formed on the inner and outer peripheral surfaces of the end of the annular piston located, and the axial flange of the ring member is formed in the concave step. Wherein the inner and outer peripheral lips of the packing member are brought into sliding contact with the inner and outer peripheral surfaces of the annular cylinder portion. 2. The ring member is integrally formed, and a plurality of holes are formed on a radial flange in a circumferential direction.
A plurality of protrusions formed on the packing member were inserted into the holes, and a protrusion having a diameter larger than the hole diameter was formed at the end of the protrusion, and the protrusion was formed on the end surface of the annular piston. The hydraulic clutch disconnection device according to claim 1, wherein the hydraulic clutch disconnection device is fitted in the recess. 3. The ring member is formed by being divided into upper and lower parts, and an annular projection formed on the packing member is clamped by the upper and lower divided parts, and a bulge is formed at an end of the projection. The hydraulic clutch disconnection device according to claim 1, wherein the bulging portion is fitted into a concave portion formed on an end surface of the annular piston.