JP2600551B2 - Manufacturing method of multi-plate clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a multiple disc clutch.

[0002]

2. Description of the Related Art Conventionally, a drive side power is transmitted to or released from a passive side by pressing or releasing a superposed clutch plate in which a plurality of drive side clutch plates and passive side clutch plates are alternately stacked. The multi-plate clutch is used as a clutch mechanism for an automatic transmission of a vehicle.

FIG. 13 shows a part of such a multi-plate clutch mechanism for an automatic transmission. A drive-side clutch plate 2a connected to a clutch retainer (clutch drum) 1 is shown in FIG.
And the passive clutch plate 2b connected to the clutch hub 3 side
2. A clutch plate 2 formed by alternately stacking a plurality of sheets
Is incorporated into the clutch retainer 1 together with the piston 4, and when the piston 4 presses the overlapped clutch plate 2 by the hydraulic pressure applied to the piston 4, the clutch plates 2a, 2
When the piston 4 is released, the clutch plates 2a and 2b are separated from each other to be in a released state. Is released.

By the way, as shown in FIG. 14, for example, as shown in FIG. 14, the overlapping clutch plate 2 is assembled to the clutch retainer 1 by forming a valley portion 5b from the outer surface of a spline groove 5 protruding inward of the clutch retainer 1. A snap ring 7 is fitted into the fitting groove 6 provided inside along the inner circumference of the clutch retainer 1, and the outer end surface 2c of the overlapped clutch plate 2 is engaged with the snap ring 7 as shown in FIG. Stopped and assembled.

The clutch plates 2a and 2b of the overlapped clutch plate 2 are pressed against and separated from each other, so that they reciprocate in the stacking direction, so that the overlapped thickness when pressed and the overlapped thickness when separated. In a state where this difference in thickness is secured as an end play A in the thickness direction of the overlapped clutch plate 2, the overlapped clutch plate 2 is locked to the snap ring 7 and assembled to the clutch retainer 1. It is what is being done.

13 and 14, reference numeral 5a denotes a peak of the spline groove 5, 8 denotes a drive shaft, 9 denotes a spring support piece, 10 denotes a return spring, and 11 denotes a working fluid supply path.

[0007]

However, in the production of a multi-plate clutch in which the overlapping clutch plate is locked by using the snap ring as described above, the position of the overlapping clutch plate is already determined in the assembly process of the overlapping clutch plate. In order to accurately position and assemble the overlapped clutch plate with thickness error of about 1 mm or less in the insertion groove of about 3 mm width of the fixed clutch retainer, it is necessary to accurately position and assemble it. A large number of snap rings having different thicknesses are prepared, and for each product, the end play of the overlapped clutch plate being assembled is measured, and the desired end play is secured. This requires a highly skilled and difficult task of assembling while selecting a snap ring suitable for More assembly work takes a yet time considerably complicated and difficult, there is a problem that will inhibit the production efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and a multi-plate is provided by using a part of a clutch retainer to lock and assemble a superposed clutch plate without using a snap ring. An object of the present invention is to provide a method of manufacturing a multi-plate clutch, in which a clutch manufacturing process is simplified and simplified, and an assembling process can be automatically performed by mechanical work.

[0009]

SUMMARY OF THE INVENTION Accordingly, a method of manufacturing a multi-plate clutch according to the present invention is directed to a method of manufacturing a multi-plate clutch in which a piston and a plurality of superposed clutch plates are incorporated in a clutch retainer. Incorporating the piston and a plurality of the superposed clutch plates into the clutch retainer,
After positioning the stacking clutch plate by contacting the lower surface of a die having a cutting blade deviated upward by an amount corresponding to the thickness of the end play of the stacking clutch plate on the lower outer side, the stacking plate faces the cutting blade. An outer peripheral wall of the clutch retainer is protruded inward by a punch blade to form a protrusion at the cutting blade position, and the outer end surface of the overlapped clutch plate is locked by the protrusion. .

Further, in the method for manufacturing a multi-plate clutch according to the present invention, at a position where the punch blade hits the clutch retainer or at a position near the punch retainer, the force for bringing the overlapped clutch plate into contact with the lower surface of the die is further increased. The present invention is characterized in that the overlapping clutch plate is more strongly clamped in the vertical direction.

[0011]

According to the above-described method for manufacturing a multiple disc clutch of the present invention,
The polymerized clutch plate incorporated in the clutch retainer,
When the projection is formed on the clutch retainer at the position of the cutting edge by contacting the lower surface of a die having a cutting edge that is shifted upward by the amount of the end play of the superimposed clutch plate on the lower side, the superimposed clutch plate becomes It is locked by the protruding portion in a state where the end play is secured. Therefore, the overlapped clutch plate is automatically secured in the end play by mechanical work, and is locked and assembled in the clutch retainer.

In forming the projecting portion by the punch blade, at a position where the punch blade contacts the clutch retainer or at a position near the clutch retainer, the force for bringing the overlapped clutch plate into contact with the lower surface of the die is further increased. The polymerization clutch plate is clamped more strongly in the vertical direction.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 12 show a multiple disc clutch and a method of manufacturing the same according to an embodiment of the present invention. FIGS. 2 to 8 are cross-sectional views each showing a manufacturing process of the present multi-plate clutch, FIGS. 9 to 11 are perspective views of several examples of projecting portions, and FIG. 12 is XII-XI in FIG.
FIG. 13 is a cross-sectional view taken along line I. In FIGS. 1 to 12, the same reference numerals as those in FIGS. 13 and 14 indicate substantially the same parts.

First, the structure of the present multi-plate clutch will be described. FIG. 1 is a cross-sectional view of only the multi-plate clutch portion of the multi-plate clutch mechanism for an automatic transmission.
Reference numeral 1 denotes a clutch retainer which forms a clutch drum of a multi-plate clutch. The overall shape of the clutch retainer 1 is such that an insertion hole 1 through which a drive shaft 8 shown in FIG.
a is provided, and is formed in a substantially empty disk shape. A circumferential groove 1b is formed in a peripheral part of the circumference, and the piston 4 and the overlapping clutch plate 2 are formed in the circular groove 1b. Is to be stored.

[0015] Then, at the back (bottom) of the annular groove 1b,
First, the return spring 1 is interposed between the piston 4 and the spring support piece 9 fixed to the shaft of the clutch retainer 1.
And a working fluid supply passage for supplying working fluid (working oil, working air, etc.) to a working fluid chamber formed between the piston 4 and the clutch retainer 1. 11 is also formed between the piston 4 and the clutch retainer 1.

Further, the annular groove 1b accommodates the overlapping clutch plate 2 corresponding to the outer peripheral portion 4a of the piston 4 from the outside of the piston 4, and the overlapping clutch plate 2 has a circular hole at the center. The disk-shaped clutch plate 2a on the side and the disk-shaped clutch plate 2b on the passive side, which also has a slightly smaller diameter and also has a slightly smaller diameter, are alternately stacked one by one and stacked on each other to form one polymer. .

When a pressure such as a hydraulic pressure is applied to the working fluid chamber between the piston 4 and the clutch retainer 1 and the piston 4 is pushed outward, the overlapped clutch plate 2 is pressed by the piston 4 and pressed. When drive is transmitted between the drive side clutch plate 2a and the passive side clutch plate 2b, and when the pressure of the piston 4 is released and the return spring 10 pushes the piston 4 back, the drive side clutch plate 2a and the passive side clutch plate 2a The drive transmission is released by being separated from the side clutch plate 2b.

Therefore, the superposed thickness of the superposed clutch plate 2 is different between the pressed state and the released state. Thick end play A
At the position where is added, the outer peripheral wall 1c of the clutch retainer 1 is protruded inward to form a protruding portion 12, and the protruding portion 12 locks the edge of the outer end surface 2c of the superimposed clutch plate 2 to perform superposition. The clutch plate 2 is assembled to the clutch retainer 1.

A clutch plate 2a on each drive side of the overlapped clutch plate 2 is provided with a clutch retainer (clutch drum) 1
The engagement between the spline groove 5 on the clutch retainer 1 side and the concave and convex teeth 13 on the outer peripheral edge of the clutch plate 2a (2d) by fixing in the rotational direction and slidable in the axial direction (FIGS. 7 and 8). On the other hand, each passive clutch plate 2b is fixed in the rotational direction to the not-shown uneven teeth on the inner peripheral edge and the spline grooves (not shown) of the clutch hub so as to be slidable in the axial direction. (See FIG. 13)
It is connected to the clutch hub 3.

Therefore, the above-mentioned protruding portion 12 is formed on the ridge 5a of the spline groove 5 of the outer peripheral wall 1c of the clutch retainer 1.
Or, it is to be provided in the valley 5b,
In the present multi-plate clutch, as shown in FIG. 9, by projecting inwardly a ridge 5 a from the outer peripheral surface side of the spline groove 5 of the clutch retainer 1 to form a projection 12, as shown in FIG. 8. The overlapping clutch plate 2 is assembled to the clutch retainer 1 by locking the convex teeth of the concave and convex teeth 13 of the clutch plate 2a on the driving side.

In this case, the formation of the projecting portion 12 at the peak portion 5a is performed as shown in FIG.
1 may be protruded as shown in the embodiment of FIG. 1, or as shown in FIGS. 10 and 12, may be protruded at a position slightly entering from the outer edge of the clutch retainer 1. Further, as shown in FIG. 11, the outer edge of the clutch retainer 1 may be bent inward and protruded.

As described above, in the present multi-plate clutch, the outer end surface of the overlapped clutch plate 2 is connected to the outer peripheral portion 1c of the clutch retainer 1.
Is locked by a protruding portion 12 projecting inward at a position where the end play A of the overlapped clutch plate 2 is added, so that the overlapped clutch plate 2 is assembled into the clutch retainer 1 as in the conventional case. The superposed clutch plate 2 can be assembled without using the snap ring 7.

Therefore, the snap ring 7 is not required, and the fitting groove 6 for fitting and mounting the snap ring 7 does not need to be provided in the clutch retainer 1, thereby simplifying the construction of the multi-plate clutch. In addition, the width of the clutch retainer 1 can be shortened by the amount that the fitting insertion groove 6 (see FIG. 14) is not provided, and the size of the multi-plate clutch can be reduced.

Further, in the present multi-plate clutch, the projecting portion 12 for locking the overlapped clutch plate 2 is formed on the peak portion 5a from the outer peripheral surface side of the spline groove 5 of the clutch retainer 1, so that the conventional multi-plate clutch is provided. Compared to forming the insertion groove 6 in the valley portion 5b from the inside of the clutch retainer 1,
There is an effect that work can be performed from the outside and work on the work is easy.

Next, a method of manufacturing the present multi-plate clutch will be described. First, as shown in FIG. 2, in a first step, the piston 4 and the overlapping clutch plate 2 are inserted into the annular groove 1b in a state where the clutch retainer 1 is turned sideways and the annular groove 1b is turned upward.
Are sequentially inserted, the inner end surface of the overlapped clutch plate 2 hits the step 1d of the clutch retainer 1, and the bottom of the piston 4 is the clutch retainer 1
And the outer peripheral portion 4 of the piston 4
a and the inner end surface of the overlapped clutch plate 2 are accommodated so as to correspond to each other.

At this time, the piston 4 is inserted between the spring supporting piece 9 and the spring supporting piece 9 via a return spring 10 so as to be pushed down, and between the lower surface of the piston 4 and the clutch retainer 1, A working fluid supply passage 11 that communicates with the working fluid to the working fluid chamber in communication with the drive shaft insertion hole 1a of the clutch retainer 1 is formed. Then, as shown in FIG. 3, in the second step, the clutch retainer 1 in which the piston 4 and the overlapped clutch plate 2 are inserted (the clutch retainer 1 in which the piston 4 and the overlapped clutch plate 2 are inserted is thereafter used as necessary). The work B) is mounted and fixed on a rotatable and vertically slidable receiving base 20 of the present manufacturing apparatus.

An NC (numerical control) machine which performs the subsequent steps by automatic control is used as a manufacturing machine employed as the above-described manufacturing apparatus. Next, in the third step, as shown in FIG. 3, the receiving table 20 in the state described above is pushed upward together with the work B from below, and the outer end surface 2c of the overlapped clutch plate 2 is moved to the receiving table 20. A die 2 which is rotatable coaxially with and movable in the horizontal direction, and is fixed in the vertical direction.
1, 21c.

Here, the die 21 will be described.
As shown in FIGS. 5 and 6, the die 21 includes a die body 21 and a die blade 21 provided on the outer surface of the lower surface thereof.
c. An inner contact portion 21a facing the inner edge of the outer end surface 2c of the overlapped clutch plate 2 projects downwardly inside the lower surface of the die blade portion 21c, and an end play portion of the overlapped clutch plate 2 extends outwardly from the lower surface. A cutting blade 21d having a blade surface deviated upward with a thickness corresponding to the thickness of A is formed to protrude outward.

Therefore, pressing the outer end surface 2c of the overlapped clutch plate 2 against the dies 21 and 21c in the third step means that the overlapped clutch plate 2 is moved to the die blade 21c as shown in FIGS. So that the outer end surface 2c of the overlapped clutch plate 2 hits the lower surface of the die blade portion 21c, and the inner edge of the outer end surface 2c hits the inner contact portion 21a of the die blade portion 21c. It becomes.

On the other hand, a punch blade 25, which will be described later, is pushed out from the outside toward the cutting blade 21d, corresponding to the cutting blade 21d of the die blade 21c, and is pushed upward in the third step. Outer peripheral wall 1 of clutch retainer 1
The c enters between the cutting blade 21d and the punch blade 25. Here, the punch blade 25 will be described. As shown in FIG. 3 and FIG. 4, the present manufacturing machine projects the die 21 to the side of the base portion 22 that rotatably supports the die 21 with the support shaft 21b. A cylinder 24 which reciprocates in the radial direction (horizontal direction) of the work B is attached to a guide rod 26 of the cylinder support 23, and the work B is attached to the tip of the cylinder 24. A punch blade 25 corresponding to the position where the protruding portion 12 is formed and the cutting blade 21d of the die 21 is provided. The head (piston) 26a of the guide rod 26 is inserted into the hydraulic chamber 24a of the cylinder 24.
a is pushed out in the direction of the work B by the hydraulic pressure W supplied to the work A, and on the other hand, a force in the direction opposite to the direction of the work B is applied to the fixed portion 27 of the machine via a spring 28. I have.

Subsequently, in a fourth step, the hydraulic pressure W is stored in the oil chamber 24a.
Is added. Accordingly, first, since the spring pressure of the spring 28 is set to a predetermined strength, the die 2
When the cylinders 24 and 21a move integrally with the clutch plate 2d as shown by the arrow e in FIG. 3 and hit the clutch retainer 1, the dies 21 and 21a are stopped from moving in the radial direction. 3, the punch blade 25 moves to a position where the punch blade 25 contacts the outer peripheral wall 1c of the clutch retainer 1 of the work B, as shown in FIG.

Further, in the fifth step, when the punch blade 25 hits the clutch retainer 1 as described above, the punch blade 2
5 (the position S1 may be a position near the position where the punch blade 25 hits the clutch retainer 1), and the force for pressing the work B upward on the receiving table 20 is further increased. The plate 2 is more firmly fixed in the vertical direction, and as a result, the overlapped clutch plate 2 is more strongly clamped in both the vertical and horizontal directions, and the swaging position is determined.

Thereafter, the punch blade 25 of the cylinder 24 is further pushed out against the spring pressure of the spring 28, and FIG.
As shown in (1), a part of the outer peripheral wall 1c of the clutch retainer 1 is protruded to form a projecting portion 12. As a result, the protrusion 1
The caulking step in which the second 2 locks the outer end surface 2c of the overlapped clutch plate 2 is completed, and the work B is assembled.

Therefore, in this caulking step, the projecting portion 12 of the clutch retainer 1 projects at a position away from the outer end surface 2c of the overlapped clutch plate 2 by the thickness of the cutting edge 21d as shown in FIG. That is, the overlapping clutch plate 2 is protruded as shown in FIG. 6 in a state where the end play A of the overlapping clutch plate 2 is secured, and the overlapping clutch plate 2 is assembled to the clutch retainer 1.

The above-mentioned caulking process will be described with reference to FIGS. 7 and 8 in which a portion where the protruding portion 12 is formed is viewed from a plane direction (upward direction in FIGS. 3 to 6). FIG. The figure shows a state in which the punch blade 25 shown corresponds to the peak 5a of the spline groove 5 from the outer peripheral side of the clutch retainer 1, and when this is pushed out as shown by an arrow g, the tip of the punch blade 25 The cutting blade portion 25a pushes and bends the mountain portion 5a so as to sandwich the mountain portion 5a from the outside, and as shown in FIG.
The projection 12 is formed by deforming into a shape, and the outer surface of the uneven teeth 13 of the outermost clutch plate 2d of the overlapped clutch plate 2 is locked.

In this case, as shown in the embodiment of FIGS. 10 and 12, in order to form the projecting portion 12 at a position slightly intruding from the outer edge of the clutch retainer 1, the clutch retainer 1 is formed.
Slightly below the outer edge of the cutting blade 21d and the punch teeth 25
11, and as shown in the embodiment of FIG.
What is necessary is just to perform by a simple bending blade (not shown) which does not have a.

The working steps up to the fifth step are for explaining the caulking step at one place of the overlapped clutch plate 2.
Since the overlapped clutch plate 2 locks a plurality of portions of the surrounding uneven teeth 13 with the protruding portions 12, furthermore, FIG.
By rotating the pedestal 20 as shown by the arrow f, the steps from the third to the fifth are repeatedly performed at each projecting portion forming position, and all the caulking steps are completed.

In this case, in each projecting portion forming operation, the cylinder 24 is provided not only at one position but also at two or three connecting positions, and the above-described caulking operation is performed at every several positions. The cradle 20 may be sequentially rotated to perform the entire caulking operation while performing the collective operation. Also, the cylinder 24
May be provided on the entire circumference of the work B and the entire caulking process may be performed at once. However, in this case, since the manufacturing machine becomes considerably large, the processes are performed collectively at several locations as described above. It is appropriate to use the method described above.

When the entire caulking process is completed as described above, the support 20 is slightly rotated to remove the correspondence between the protruding portion 12 and the cutting blade 21d. ) Is taken out of the cradle 20. In the manufacturing method of the multi-plate clutch described above, the cutting blade 21d having a thickness corresponding to the desired end play A is attached according to the product, and caulking is performed to secure the desired end play A. A multi-plate clutch can be manufactured automatically and easily, and it is necessary to prepare a large number of snap rings as in the past, and to select one that meets desired conditions from among them to manufacture the clutch. In addition, an inefficient manufacturing method can be drastically improved, and as a result, high-quality products can be mass-produced.

[0040]

As described in detail above, according to the method of manufacturing a multiple disc clutch of the present invention, a multi-disc clutch constructed by incorporating a piston and a plurality of superposed clutch plates in a clutch retainer is manufactured. In the method, the piston and a plurality of the overlaid clutch plates are incorporated into the clutch retainer, and the outer end surface of the overlaid clutch plate is placed on the lower outer side by an amount corresponding to the thickness of the end play of the overlaid clutch plate. After contacting the lower surface of a die having a cutting edge deviated to position the overlapping clutch plate, the outer peripheral wall of the clutch retainer is protruded inward by a punch blade opposed to the cutting blade to thereby position the cutting blade. A multi-disc clutch is manufactured by forming a protruding portion on the outer end surface of the overlapped clutch plate by the protruding portion. By installing cutting blades in the production machine that are suitable for the desired length, a multi-plate clutch that secures the desired end play for the overlapped clutch plate can be mass-produced with high efficiency, greatly contributing to the production of good products and the improvement of productivity. There are benefits to gain.

In forming the projecting portion by the punch blade, the force at which the overlapping clutch plate is brought into contact with the lower surface of the die at the position where the punch blade contacts the clutch retainer or in the vicinity thereof is further increased, and the overlapping clutch plate is vertically moved. Since the clamping is performed more strongly in the direction, there is an advantage that the protrusion can be formed reliably.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present multi-plate clutch.

FIG. 2 is a cross-sectional view of a work showing a state in which a superposed clutch plate is incorporated in a clutch retainer in a manufacturing process of the present multi-plate clutch.

FIG. 3 is a sectional view showing a manufacturing process of the present multi-plate clutch.

FIG. 4 is a sectional view showing a manufacturing process of the present multi-plate clutch.

FIG. 5 is an enlarged cross-sectional view showing a protruding portion of the present multi-plate clutch before a protruding portion is formed.

FIG. 6 is an enlarged cross-sectional view showing a protruding portion of the present multi-plate clutch after a protruding portion is formed.

FIG. 7 is a sectional view of a protruding portion of the present multi-plate clutch before a protruding portion is formed in a plan view.

FIG. 8 is a cross-sectional view of a protruding portion of the present multi-plate clutch after a protruding portion is formed in a plan view.

FIG. 9 is an enlarged perspective view of a portion IX of FIG. 1 showing a protruding portion of the present multi-plate clutch.

FIG. 10 is a perspective view showing another embodiment of the projecting portion of the present multi-plate clutch.

FIG. 11 is a perspective view showing still another embodiment of the projection of the present multi-plate clutch.

FIG. 12 is a sectional view taken along line XII-XII of FIG. 10;

FIG. 13 is a partial cross-sectional view when a conventional multi-plate clutch is assembled to an automatic transmission.

FIG. 14 is an exploded perspective view showing a mounting structure of a snap ring for locking a superposed clutch plate according to a conventional example.

[Explanation of symbols]

 Reference Signs List 1 clutch retainer (clutch drum) 1a insertion hole 1b annular groove 1c outer peripheral wall 1d stepped portion 2 overlapping clutch plate 2a drive side clutch plate 2b passive side clutch plate 2c outer end surface 2d outermost clutch plate 3 clutch hub 4 piston 4a outer peripheral portion Reference Signs List 5 spline groove 5a peak portion 5b valley portion 6 insertion groove 7 snap ring 8 drive shaft 9 spring support piece 10 return spring 11 working fluid supply path 12 projecting portion 13 concave and convex teeth 20 receiving table 21 die 21a inner contact portion 21b Support shaft 21c Die blade 21d Cutting blade 22 Base part 23 Cylinder support part 24 Cylinder 24a Hydraulic chamber 25 Punch blade 25a Cutting blade part 26 Guide rod 26a Head 27 Fixed part 28 Spring A End play B Work

 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Toshihiro Kita 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (56) References JP-A-1-240230 (JP, A) Hei 4-62429 (JP, U) JP-A 2-143551 (JP, U) JP-A 3-41151 (JP, Y2)

Claims (2)

(57) [Claims] 1. A method of manufacturing a multi-plate clutch in which a piston and a plurality of superposed clutch plates are incorporated in a clutch retainer, wherein the piston and the plurality of superposed clutch plates are disposed in the clutch retainer. Incorporation, the outer end surface of the overlapped clutch plate is brought into contact with the lower surface of a die having a cutting edge which is displaced upward by an amount corresponding to the thickness of the end play of the overlapped clutch plate on the lower outer side. After positioning, the outer peripheral wall of the clutch retainer is protruded inward by a punch blade opposed to the cutting blade to form a projection at the cutting blade position, and the outer end surface of the overlapped clutch plate is formed by the projection. A method for manufacturing a multi-plate clutch, characterized in that the clutch is engaged. 2. In the position where the punch blade hits the clutch retainer or at a position near the punch retainer, the force for bringing the overlapping clutch plate into contact with the lower surface of the die is further increased, and the overlapping clutch plate is further strengthened in the vertical direction. The method for manufacturing a multi-plate clutch according to claim 1, wherein clamping is performed.