JP2007040526A - Wet clutch friction plate and multiple disc friction clutch apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the life of a clutch, enlarge the use environment of the clutch, and reduce the size of a lubrication pump since the clutch can be cooled with less flow of lubricating oil by effectively cooling the clutch with less flow of lubricating oil in a clutch engagement and torque transmission process in a slipping state. <P>SOLUTION: A release groove 11a having an inclination opposite to a rotating direction from the inner peripheral side to the outer peripheral side and releasing the lubricating oil from the inner peripheral side to the outer peripheral side is formed in one friction face of a drive plate 2. Also, an inflow groove 11b facing the release groove 11a and taking the lubricating oil from the outer peripheral side to the inner peripheral side is formed in the same surface. The release groove 11a and the inflow groove 11b form a cooling means. The groove sectional area of the inflow groove 11b is set larger compared to that of the release groove 11a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a wet clutch friction plate and a multi-purpose clutch that extend the life of the clutch and expand the use environment of the clutch by effectively cooling with a small lubricating oil flow rate in the process of clutch engagement and torque transmission in a slipping state. The present invention relates to a plate friction clutch device.

  In a multi-plate friction clutch device used for a starting clutch and a dual clutch transmission (DCT), several driven plates (SP) and drive plates (FP) are alternately overlapped, and the piston is pressed and pressed to make it act and not act. , Configured to be fastened or released.

  Further, in Patent Document 1, when the friction plate rotates, a plurality of oil grooves having a discharge angle for discharging oil from the inner peripheral side to the outer peripheral side of the friction plate, and the outer peripheral side to the inner peripheral side of the friction plate. A plurality of oil grooves having an inflow angle for drawing oil into are mixed at substantially equal intervals.

That is, in Patent Document 1, a groove is formed in the friction material arranged inside the drum to obtain the effect of releasing and taking in the lubricating oil by the groove.
JP 2004-76896 A

  However, in the multi-plate friction clutch device disclosed in Patent Document 1, it is considered that the purpose is to release and take in the lubricating oil by the groove. Therefore, the lubricating oil released by centrifugal force cannot be taken in sufficiently and may stay.

  Further, since the discharged lubricating oil flows out of the drum by centrifugal force, it cannot be cooled sufficiently and a good lubricating effect cannot be exhibited.

  The present invention has been made in view of the above-described circumstances, and in the process of clutch engagement and torque transmission in a slipping state, the clutch life is extended by effectively cooling with a small lubricating oil flow rate. It is another object of the present invention to provide a wet clutch friction plate and a multi-plate friction clutch device that can expand the use environment of the clutch and can be cooled with a small flow rate of lubricating oil, so that the lubrication pump can be reduced.

In order to achieve the above object, a wet clutch friction plate according to the present invention comprises a mandrel plate connected to the input side, and a friction material layer fixed to at least one surface thereof,
The one friction material layer has an inclination that opposes the rotation direction from the inner peripheral side to the outer peripheral side, and a discharge groove that discharges lubricating oil from the inner peripheral side to the outer peripheral side, and the discharge groove face each other. An inflow groove for taking lubricating oil from the outer peripheral side to the inner peripheral side,
Comprising cooling means comprising:
The groove cross-sectional area of the inflow groove is set wider than the discharge groove.

  In the wet clutch friction plate according to the present invention, preferably, the inflow groove for taking in lubricating oil with an inclination from the outer peripheral side to the inner peripheral side has a groove width that is wide on the outer peripheral side and narrow on the inner peripheral side. ing.

  In the wet clutch friction plate according to the present invention, preferably, the inflow groove for taking in the lubricating oil with an inclination from the outer peripheral side to the inner peripheral side is the discharge groove for releasing the lubricating oil to the outer peripheral side. It has a deeper groove.

The multi-plate friction clutch device according to the present invention is a multi-plate friction clutch device in which a driven plate and a drive plate are alternately overlapped and actuated or deactivated by pressing force of a piston, thereby being fastened or released. ,
The drive plate is a wet clutch friction plate according to any one of claims 1 to 3.

In the multi-plate friction clutch device according to the present invention, the diameter of the discharge hole of the drum is not more than the sum of the thickness of the driven plate and the thickness of the drive plate,
The number of the discharge holes in the axial direction is preferably half or less of the number of drive plates.

  In the multi-plate friction clutch device according to the present invention, preferably, the position of the discharge hole is located at a large spline diameter.

  In the multi-plate friction clutch device according to the present invention, preferably, the position of the discharge hole is located at a small spline diameter.

  In the multi-plate friction clutch device according to the present invention, preferably, the position of the discharge hole is the same position as the position of the drive plate when the friction clutch is engaged, and has one or more intervals.

  According to the present invention, since the groove cross-sectional area of the inflow groove is set wider than the discharge groove, the best groove for cooling capable of actively taking in lubricating oil is provided. By combining with the discharge hole, the effect can be further enhanced.

  Moreover, the pump capacity which supplies lubricating oil can be made small by that, and a fuel consumption improvement can be aimed at.

  Therefore, in the clutch engagement and torque transmission process in the slipping state, effective cooling with a small lubricating oil flow rate can prolong the life of the clutch and expand the use environment of the clutch.

  Hereinafter, a wet clutch friction plate and a multi-plate friction clutch device according to embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view of a starting clutch unit provided with a multi-plate friction clutch device according to an embodiment of the present invention. The starting clutch unit is connected between the engine and the transmission.

  In the multi-plate friction clutch device, a driven plate 1 (SP) and a drive plate 2 (FP) are formed in an annular chamber formed between a clutch drum 5 connected to the transmission side and a clutch hub 7 connected to the engine side. Are overlapping one another. The driven plate 1 is a metal plate having splines on the outer peripheral side and is slidably engaged with the inner peripheral splines of the clutch drum 5 in the axial direction, and the drive plate 2 has splines on the inner peripheral side. A metal plate forms a core plate of a friction plate, and engages with an outer peripheral spline of the clutch hub 7 so as to be slidable in the axial direction. The core metal plate portion of the drive plate 2 (FP) has a configuration in which a friction material layer 2a is attached to both surfaces thereof as a facing material or a lining. Further, a configuration may be adopted in which friction material layers are alternately attached to one side of the driven plate 1 and the drive plate 2 as a facing material or lining. When the hydraulic pressure is supplied to the pressure chamber formed between the clutch drum 5 and the piston 4, the driven plate 1 and the drive plate 2 are moved by the piston 4 and slide in the axial direction by the pressing force. The clutch is fastened to 6 and the clutch is fastened. When the hydraulic pressure is released, the pressure of the piston 4 is released and the clutch is released.

  FIG. 2 is a partial cutaway schematic view of a drive plate to be mounted on the multi-plate friction clutch device according to the embodiment of the present invention.

  FIG. 3A is a schematic diagram of a partial cutout of a drive plate to be attached to the multi-plate friction clutch device according to the embodiment of the present invention, and FIG. 3B is a partial cutout of a drive plate according to the modification. It is a schematic diagram.

  FIG. 4 is a partial cross-sectional view of the multi-plate friction clutch device according to the embodiment of the present invention.

  In the present embodiment, as shown in FIG. 2, the friction material layer 2a fixed to one surface of the drive plate 2 is provided with a groove having an inclination that opposes the rotation direction from the inner peripheral side to the outer peripheral side. A discharge groove 11a for discharging the lubricating oil from the inner peripheral side to the outer peripheral side is formed. In addition, on the same surface side, that is, the same friction material layer, an inflow groove 11b for taking in lubricating oil from the outer peripheral side facing the discharge groove 11a to the inner peripheral side is formed. The discharge groove 11a and the inflow groove 11b constitute a cooling means.

  In the present embodiment, as shown in FIGS. 2 and 3A, the inflow groove 11b has a wider groove cross-sectional area than the discharge groove 11a.

  In addition, the discharge groove 11a and the inflow groove 11b for releasing and taking in the lubricating oil face each other so as to expand toward the square shape, that is, toward the inner diameter direction, so that the lubricating oil is discharged and taken in on the same surface. It is a groove that can exert an effect.

  Further, the combination of the discharge groove 11a and the discharge hole 10 of the clutch drum 5 enhances the effect.

  Therefore, in the present embodiment, since the lubricating oil is discharged and taken in on the same surface, the best discharge groove 11a and the inflow groove 11b are provided for cooling, and the combination of the discharge hole 10 of the clutch drum 5 is more effective. Can be increased. In addition, the pump capacity for supplying the lubricating oil can be reduced, thereby improving fuel consumption.

  In other words, in the clutch engagement and torque transmission process in the slipping state, effective cooling with a small lubricating oil flow rate prolongs the life of the clutch, expands the usage environment of the clutch, and reduces the lubricating oil. Because it can be cooled at a flow rate of, the lubrication pump can be made smaller.

  Further, as shown in FIG. 3B, the inflow groove 11b for taking in lubricating oil with an inclination from the outer peripheral side to the inner peripheral side has a groove width that is wide on the outer peripheral side and narrow on the inner peripheral side. May be.

  Further, the inflow groove 11b for taking the lubricating oil with an inclination from the outer peripheral side to the inner peripheral side may be formed deeper than the discharge groove 11a for releasing the lubricating oil to the outer peripheral side.

  Further, as indicated by arrows in FIG. 4, in the clutch drum 5 where the discharge hole 10 is provided, the lubricating oil flowing from the inner peripheral side to the outer peripheral side along the discharge groove 11 a passes through the discharge hole 10. To the outside.

  In locations where the discharge holes 10 are not provided, the lubricating oil is taken from the outer peripheral side to the inner peripheral side along the inflow groove 11b.

  Further, as shown in FIG. 4, preferably, the diameter of the discharge hole 10 of the clutch drum 5 is equal to or less than the sum of the thickness of the driven plate 1 and the thickness of the drive plate 2, and the number of the discharge holes 10 in the axial direction is preferable. Is less than half of the number of drive plates 2.

  Furthermore, preferably, the position of the discharge hole 10 is the same position as the position of the drive plate 2 when the friction clutch is engaged, and has an interval of one or more.

  FIGS. 5A and 5B are schematic views of drive plates to be mounted on the multi-plate friction clutch device according to the modification of the embodiment of the present invention.

  First, in FIG. 5A, the discharge groove 11a and the inflow groove 11b are each formed in an arcuate shape (arc shape), and the inflow groove 11b has a groove width (groove breakage) wider than the discharge groove 11a. Area).

  Next, in FIG. 5B, the discharge groove 11a and the inflow groove 11b are each formed in an arc shape (arc shape), and the inflow groove 11b has a groove width that is wide on the outer peripheral side and narrow on the inner peripheral side. Have.

  FIGS. 6A to 6D are schematic views of drive plates to be mounted on the multi-plate friction clutch device according to the modification of the embodiment of the present invention.

  As shown in FIGS. 6A to 6D, in addition to the discharge groove 11a and the inflow groove 11b, other grooves may be formed in combination. The inflow groove 11b has a wider groove width (groove cross-sectional area) than the discharge groove 11a.

  FIGS. 7A to 7D are schematic views of a drive plate to be mounted on a multi-plate friction clutch device according to a modification of the embodiment of the present invention.

As shown in FIGS. 7A and 7B, in addition to the discharge groove 11a and the inflow groove 11b, other grooves may be combined. The inflow groove 11b has a wider groove width (groove cross-sectional area) than the discharge groove 11a.
As shown in FIGS. 7C and 7D, the inflow groove 11b may be formed so that its outer peripheral side is wide and its inner peripheral side is narrow. In addition to the discharge groove 11a and the inflow groove 11b, other grooves may be combined and formed. The inflow groove 11b has a wider groove width (groove cross-sectional area) than the discharge groove 11a.

  FIGS. 8A to 8D are schematic views of a drive plate to be mounted on the multi-plate friction clutch device according to a modification of the embodiment of the present invention.

  As shown in FIGS. 8A to 8D, the inflow groove 11b may be formed so that its outer peripheral side is wide and its inner peripheral side is narrow. In addition to the discharge groove 11a and the inflow groove 11b, other grooves may be combined and formed. The inflow groove 11b has a wider groove width (groove cross-sectional area) than the discharge groove 11a.

  FIG. 9 is a schematic view of a drive plate that is mounted on a multi-plate friction clutch device according to a modification of the embodiment of the present invention.

  As shown in FIG. 9, the inflow groove 11b may be formed so that its outer peripheral side is wide and its inner peripheral side is narrow. In addition to the discharge groove 11a and the inflow groove 11b, other grooves may be combined and formed. The inflow groove 11b has a wider groove width (groove cross-sectional area) than the discharge groove 11a.

  FIGS. 10A and 10B are partial cross-sectional views of modifications of the clutch drum (housing).

  In the example of FIG. 10A, the discharge hole 10 of the clutch drum 5 is on the spline large diameter side, so that the lubricant discharged to the outside is positively discharged from the discharge hole 10.

  In the example of FIG. 10B, since the discharge hole 10 of the clutch drum 5 is on the small diameter side of the spline, the lubricating oil released to the outside is blocked and the lubricating oil accumulated in the large diameter spline is reduced to the small diameter spline portion. Therefore, the present invention aims at a passive discharge method of discharging the lubricating oil from the discharge hole 10 in the small-diameter spline portion.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

It is typical sectional drawing of the starting clutch unit provided with the multi-plate friction clutch apparatus which concerns on embodiment of this invention. It is a partial notch schematic diagram of the drive plate with which the multi-plate friction clutch device according to the embodiment of the present invention is mounted. (A) is the partial notch schematic diagram of the drive plate with which the multi-plate friction clutch apparatus which concerns on embodiment of this invention is mounted | worn, (b) is the partial notch schematic diagram of the drive plate which concerns on the modification. It is. 1 is a partial cross-sectional view of a multi-plate friction clutch device according to an embodiment of the present invention. (A) (b) is a schematic diagram of the drive plate with which the multi-plate friction clutch apparatus which concerns on the modification of embodiment of this invention, respectively is mounted | worn. (A) thru | or (d) is a schematic diagram of the drive plate with which the multi-plate friction clutch apparatus which concerns on the modification of embodiment of this invention, respectively is mounted | worn. (A) thru | or (d) is a schematic diagram of the drive plate with which the multi-plate friction clutch apparatus which concerns on the modification of embodiment of this invention, respectively is mounted | worn. (A) thru | or (d) is a schematic diagram of the drive plate with which the multi-plate friction clutch apparatus which concerns on the modification of embodiment of this invention, respectively is mounted | worn. It is a schematic diagram of the drive plate with which the multi-plate friction clutch apparatus which concerns on the modification of embodiment of this invention is mounted | worn. (A) and (b) are the partial sectional views concerning the modification of a clutch drum (housing), respectively.

Explanation of symbols

1 Driven plate 2 Drive plate 2a Friction material 4 Piston 5 Clutch drum (housing)
6 Retainer plate 7 Hub 10 Discharge hole 11a Discharge groove 11b Inflow groove

Claims (8)

It consists of a mandrel plate connected to the input side and a friction material layer fixed to at least one surface thereof,
The one friction material layer has an inclination that opposes the rotation direction from the inner peripheral side to the outer peripheral side, and discharge grooves for releasing lubricating oil from the inner peripheral side to the outer peripheral side, and the discharge grooves face each other. An inflow groove for taking lubricating oil from the outer peripheral side to the inner peripheral side,
Comprising cooling means comprising:
The wet clutch friction plate, wherein a groove cross-sectional area of the inflow groove is set wider than the discharge groove.   2. The wet method according to claim 1, wherein the inflow groove for taking in lubricating oil with an inclination from the outer peripheral side to the inner peripheral side has a groove width that is wide on the outer peripheral side and narrow on the inner peripheral side. Clutch friction plate.   The inflow groove for taking in lubricating oil with an inclination from the outer peripheral side to the inner peripheral side has a deeper groove than the discharge groove for discharging the lubricating oil to the outer peripheral side. 3. The wet clutch friction plate according to 1 or 2. A clutch drum connected to either the input side or the output side;
A clutch hub which is opposed to the clutch drum in the radial direction and forms an annular chamber between the clutch drum and connected to either the input side or the output side;
It is alternately arranged in the annular chamber, and is composed of a driven plate that is splined to the output side of the clutch drum and the clutch hub, and a drive plate that is splined to the input side of the clutch drum and the clutch hub. In the released multi-plate friction clutch device,
The drive plate is a wet clutch friction plate according to any one of claims 1 to 3,
The diameter of the discharge hole of the clutch drum is not more than the sum of the thickness of the driven plate and the thickness of the drive plate,
The multi-plate friction clutch device according to claim 1, wherein the number of the discharge holes in the axial direction is half or less of the number of drive plates.   The multi-plate friction clutch device according to claim 4, wherein the position of the discharge hole is located at a large spline diameter.   The multi-plate friction clutch device according to claim 4, wherein the position of the discharge hole is located at a small spline diameter.   The multi-plate according to any one of claims 4 to 6, wherein the position of the discharge hole is the same as the position of the drive plate when the friction clutch is engaged, and has an interval of one or more. Friction clutch device. A clutch drum connected to either the input side or the output side;
A clutch hub which is opposed to the clutch drum in the radial direction and forms an annular chamber between the clutch drum and connected to either the input side or the output side;
It is alternately arranged in the annular chamber, and is composed of a driven plate that is splined to the output side of the clutch drum and the clutch hub, and a drive plate that is splined to the input side of the clutch drum and the clutch hub. In the released multi-plate friction clutch device,
The multi-plate friction clutch device according to any one of claims 1 to 3, wherein the drive plate is the wet clutch friction plate according to any one of claims 1 to 3.

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