JP2009127721A - Cancel plate of fluid type transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cancel plate having a flow straightening function for a lubricating oil without requiring a complicated metal processing. <P>SOLUTION: The cancel plate 3 is employed for a fluid type transmission and forms an annular cancel chamber 70a in the area to an annular piston 2 which presses a multi-disc clutch 5 in sliding in the axial direction caused by a fluid pressure. The cancel plate 3 is equipped with an annular member 31 arranged by confronting the piston 2 and a seal lip 32 adhered to the peripheral surface of the annular member 31 and making slide contact with the inside circumferential surface of the piston 2. The annular member 31 keeps an annular flow straightening part 33 made of a resilient material adhered which extends axially in the opposite direction to the cancel chamber 70a for regulating the flowing direction of the lubricating oil to be supplied to the clutch 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cancel plate for a fluid transmission.

  Conventionally, for example, in a power connection part of a fluid transmission such as an automatic transmission (AT) of an automobile, an annular cancel plate is used (see Patent Document 1). FIG. 3 is a cross-sectional view showing a main part of a fluid transmission having a conventional cancel plate. In the fluid transmission, an annular space 170 is formed inside the casing 101, and an annular piston 102 that is externally fitted to the shaft portion 111 of the casing 101 so as to be axially slidable in the annular space 170, and the piston 102 A cancel plate 103 that is coaxially fitted to the shaft portion 111 of the casing 101 and a multi-plate clutch 105 that is pressed when the piston 102 slides in one axial direction are housed.

  An axial end portion side (upper side in FIG. 3) of the annular space 170 is sealed by the piston 102 and the casing 101 to form an annular pressure chamber (not shown). In the annular space 170, an annular cancellation chamber 170a surrounded by the piston 102, the cancellation plate 103, and the shaft portion 111 of the casing 101 is formed on one side in the axial direction of the pressure chamber (lower side in FIG. 3). ing. A clutch chamber 170b for accommodating the multi-plate clutch 105 is formed below the cancel chamber 170a in the annular space 170. The piston 102 slides to one side in the axial direction according to the hydraulic control for the pressure chamber and presses the multi-plate clutch 105. Thereby, the driving force is transmitted in the power connecting portion.

  The cancel plate 103 includes a metal annular member 131 extending in the radial direction of the casing 101, and a seal lip 132 made of an elastic material such as rubber is bonded to the outer peripheral surface of the annular member 131. In addition, a bent annular rectifying portion 131a extending along the axial direction is formed on the opposite side of the cancellation chamber 170a in a state of being accommodated in the casing 101 in the radially central portion of the annular member 131, and an inner peripheral portion thereof is formed. A plurality of oil drain passages 131b penetrating in the axial direction is formed.

  Lubricating oil for lubricating the clutch plate 151 is present in the clutch chamber 170b. The lubricating oil is supplied from the cancel chamber 170a to the clutch chamber 170b through the oil drain passage 131b. Since the casing 101 rotates at a high speed when the engine of the automobile is operating, the lubricating oil flows from the radially inner side to the outer side along the cancel plate 103 by centrifugal force, as indicated by arrows in FIG. The flow direction is adjusted by the annular rectification unit 131 a and guided to the clutch plate 151. As a result, the clutch plate 151 of the multi-plate clutch 105 is lubricated.

JP-A-2005-90568

The annular member 131 of the conventional cancel plate 103 is integrally formed, for example, by subjecting a flat metal plate to bending or deep drawing. However, since the cancel plate 103 is complicated in shape by the annular rectifying portion 131a, the processing is difficult, the productivity is low, and the production cost is high.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a cancel plate having a function of rectifying lubricating oil without complicated metal processing.

In order to achieve the above object, a cancel plate of the present invention is a cancel plate for a fluid transmission that forms an annular cancel chamber with an annular piston that slides in the axial direction by fluid pressure to press a multi-plate clutch. An annular member disposed opposite to the piston, a seal lip bonded to the outer peripheral surface of the annular member and slidably contacting the inner peripheral surface of the piston, and bonded to the annular member along the axial direction. And an annular rectifier made of an elastic material that extends in the opposite direction to the cancellation chamber and adjusts the flow direction of the lubricating oil supplied to the multi-plate clutch.
According to the cancel plate having such a configuration, since the annular rectification portion made of an elastic material formed separately from the annular member is bonded to the annular member, the conventional product in which the annular rectification portion and the annular member are integrally formed. In comparison, the processing of the annular member is facilitated.

  In the cancel plate, it is preferable that a seal lip and the annular rectifying portion are integrally formed. According to this, since bonding and molding are only required once, the number of processing steps can be reduced as compared with the case where the seal lip and the annular rectifying portion are separately formed.

Moreover, it is preferable that the said cancellation plate has the notch part penetrated to a radial direction in the cyclic | annular rectification | straightening part.
According to this, when the lubricating oil flows from the inside in the radial direction of the casing to the outside, the flow detouring the tip of the annular rectifying portion toward the multi-plate clutch and the notch portion are passed. As a result, a flow toward the multi-plate clutch is generated, so that the lubricating oil can be widely supplied to the multi-plate clutch in the axial direction. Therefore, even a multi-plate clutch that is bulky in the axial direction of the casing can be lubricated efficiently and evenly.

  According to the present invention, the annular member can be manufactured without requiring complicated metal processing even though it has a rectifying function for the lubricating oil, so that the manufacturing cost of the cancel plate having the rectifying function for the lubricating oil can be reduced. can do.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a main part of a power connection part in an automatic transmission of an automobile using a cancel plate according to a first embodiment of the present invention. A casing 1, an annular piston 2, an annular cancel plate 3, and a multi-plate clutch 5 are disposed in the power connection portion.

  The casing 1 is a hollow cylindrical body having an annular space 70 formed therein, and the axial center of the casing 1 is directed from the base end portion (upper side in FIG. 1) toward one axial side (lower side in the drawing). And a cylindrical shaft portion 11 is provided so as to protrude coaxially. A retaining ring 6 that protrudes radially outward is fixed to the outer peripheral surface 11 a at the tip of the shaft 11.

  The piston 2 includes a metal annular member 21. The annular member 21 is formed by press-molding a metal plate into a bottomed cylindrical shape, and an inner peripheral side is fitted on the outer peripheral surface 11a of the shaft portion 11, and a cylindrical portion 21a extending toward the cancel plate 3 is formed on the outer peripheral side. ing.

The cancel plate 3 includes a metal annular member 31 fitted on the shaft 11, an annular seal lip 32 attached to the outer peripheral surface of the annular member 31, and a skirt-shaped annular rectifier that extends to one side in the axial direction. Part 33.
The annular member 31 is formed by pressing a metal plate into an annular shape. A plurality of oil drain passages 31 b penetrating in the axial direction are formed in the inner peripheral portion of the annular member 31.

The annular rectifying portion 33 and the seal lip 32 are made of an elastic material such as rubber. The annular rectifying portion 33 and the seal lip 32 are integrally molded, and are vulcanized and bonded to the annular member 31 simultaneously with the molding.
The annular rectifying portion 33 is a tapered surface in which the generatrix of the outer peripheral surface is parallel to the axis of the shaft portion 11, and the inner peripheral surface is gradually tapered downward.

  In the annular space 70, the cancel plate 3 and the piston 2 face each other with a predetermined gap in the axial direction. The seal lip 32 of the cancel plate 3 is in sliding contact with the inner peripheral surface 21b of the cylindrical portion 21a of the piston 2, and seals between the piston 2 and the annular member 31. The inner peripheral portion of the cancel plate 3 is in contact with the outer peripheral surface 11a of the shaft portion 11 and the retaining ring 6, thereby restricting movement of the cancel plate 3 to one side in the axial direction.

  In the annular space 70, an annular pressure chamber (not shown) is formed between the piston 2 and the casing 1, and an annular cancellation chamber 70 a is formed between the cancel plate 3 and the piston 2. Further, in the annular space 70, a clutch chamber 70b for accommodating the multi-plate clutch 5 is formed on one side in the axial direction of the cancel chamber 70a.

  With the above configuration, the hydraulic oil is supplied to the pressure chamber to increase the hydraulic pressure in the pressure chamber, and the hydraulic oil in the cancellation chamber 70a is discharged to the outside to reduce the hydraulic pressure in the cancellation chamber 70a. Slides to one side (cancel plate 3 side) in the axial direction. At this time, the tip of the cylinder portion 21 a presses the clutch plate 51 of the multi-plate clutch 5. Thereby, the driving force is transmitted in the power connecting portion. Further, the hydraulic oil in the pressure chamber is discharged to lower the hydraulic pressure in the pressure chamber, and the hydraulic oil in the cancellation chamber 70a is increased by supplying the hydraulic oil to the cancellation chamber 70a, whereby the piston 2 is separated from the multi-plate clutch 5. Move in the axial direction. As a result, transmission of the driving force in the power connecting portion is interrupted.

The hydraulic oil in the cancel chamber 70 a flows into the clutch chamber 70 b through the oil discharge passage 31 b of the cancel plate 3 and is used as lubricating oil for lubricating the multi-plate clutch 5. This lubricating oil flows from the shaft portion 11 toward the outer circumferential direction by the centrifugal force generated by the rotation of the casing 1, and lubricates the multi-plate clutch 5. The lubricating oil that has lubricated the multi-plate clutch 5 is discharged from a collection hole (not shown) provided on the radially outer peripheral side of the casing 1.
Here, as indicated by an arrow in FIG. 1, the lubricating oil flowing in the clutch chamber 70 b from the radially inner side to the outer side is guided by the annular rectifying portion 33 and flows toward the one side in the axial direction. Then, after passing through the annular rectifying portion 33, the fluid flows again radially outward to lubricate the multi-plate clutch 5.

  The cancel plate 3 can simplify the shape of the annular member 31 as compared with the case where the annular rectification portion is formed in the annular member 31 itself. Accordingly, the cancel plate 3 of the present invention does not require complicated processing on the annular member 31, and thus the manufacturing cost of the cancel plate can be reduced. Further, since the annular rectifying portion 33 and the seal lip 32 are integrally formed, the number of processing steps can be reduced as compared with the case where the annular rectifying portion 33 and the seal lip 32 are separately formed. Furthermore, since the annular rectifying unit 33 is made of an elastic material such as rubber, it is easy to mold and has a high degree of freedom in shape selection. For this reason, the optimal flow direction of the lubricant can be easily set according to the axial width of the multi-plate clutch 5 and the positional relationship between the annular rectifier 33 and the multi-plate clutch 5.

  FIG. 2 is a cross-sectional view of a main part of a power connection portion in an automatic transmission of an automobile using a cancel plate according to a second embodiment of the present invention. In this embodiment, the annular rectifying portion 33 is formed with a plurality of notches 33a penetrating in the radial direction at equal intervals in the circumferential direction. According to this, when the lubricating oil passes through the annular rectifying portion 33, the lubricating oil flow (represented by the solid line arrow in FIG. 2) bypassing the tip portion and the lubricating oil passing through the notch 33a. A flow (represented by a chain line arrow in FIG. 2) is generated, and the lubricating oil can be supplied over a wide range in the axial direction. Therefore, even the multi-plate clutch 5 that is bulky in the axial direction can be efficiently lubricated to every corner.

  In the cancel plate 3 of the second embodiment, a bottomed cylindrical recess 31 c is formed in the center portion in the radial direction of the annular member 31. The recess 31 c is provided to support the lower end of the spring when the return spring is accommodated between the piston 2 and the cancel plate 3.

  The above embodiments are all illustrative and not restrictive. The technical scope of the present invention is defined by the claims, and all modifications within the scope equivalent to the configurations described therein are also included in the technical scope of the present invention. For example, the shape of the annular rectifying unit 33 is not particularly limited, and is arbitrarily set so that lubricating oil is uniformly supplied to the multi-plate clutch 5 in consideration of the positional relationship between the cancel plate 3 and the multi-plate clutch 5. Is done. In the second embodiment, a plurality of the notches 33a are formed. However, since the cancel plate 3 also rotates with the rotation of the shaft 11, the number of the notches 33a can be increased as long as at least one is formed. The effect extends over the entire circumferential direction of the plate clutch 5. Further, the seal lip 32 and the annular rectifying unit 33 are not necessarily formed integrally, and may be separate.

FIG. 1 is a cross-sectional view of a main part of a power connection part in an automatic transmission of an automobile using a cancel plate according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a main part of a power connection portion in an automatic transmission of an automobile using a cancel plate according to a second embodiment of the present invention. FIG. 3 is a cross-sectional view of a main part of a power connection portion in an automatic transmission of an automobile using a conventional cancel plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 11 Shaft part 2 Piston 21 Annular member 3 Cancel plate 31 Annular member 32 Seal lip 33 Annular rectification part 33a Notch part 70 Annular space 70a Cancellation chamber

Claims (3)

A cancel plate of a fluid transmission that forms an annular cancel chamber with an annular piston that slides in the axial direction by fluid pressure and presses the multi-plate clutch,
An annular member disposed opposite to the piston, a seal lip adhered to the outer peripheral surface of the annular member and slidably in contact with the inner peripheral surface of the piston, and adhered to the annular member, along the axial direction, the cancel chamber A cancel plate for a fluid transmission, comprising: an annular rectification unit made of an elastic material that extends in a direction opposite to that of the elastic plate and adjusts a flow direction of lubricating oil supplied to the multi-plate clutch.   The cancel plate of the fluid transmission according to claim 1, wherein the seal lip and the annular rectifying portion are integrally formed.   The cancel plate of the fluid transmission according to claim 1 or 2, wherein a cutout portion penetrating in a radial direction is formed in the annular rectifying portion.

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