JPH01312227A - multi-plate clutch - Google Patents

Abstract

PURPOSE:To shift a middle plate certainly by half the moving quantity of a pressing plate, by providing in a differential transmission mechanism with a guide member connected with a pressure receiving plate, a rotor capable of rolling on the guide member, a driving member connected with the pressing plate and a support shaft connected with the middle plate. CONSTITUTION:A differential transmission mechanism 6 has a guide member 7 connected with a fly-wheel 1 and a bearing 8 as a rotor capable of rolling on the guide member 7 while it rotates round the axis transverse to the moving direction of a pressing plate 2. And also is provided with a driving member 9 which makes contact with the outer periphery of the bearing 8 so as to rotate the bearing 8 according to movement of the pressing plate 2 and then connects with the pressing plate 2; a support shaft 10 which connects with a middle plate 4 so as to rotatably support the bearing 8 is provided. By this constitution, in a differential transmission mechanism 6, the middle plate 4 can be shifted by just half the moving quantity of the pressing member 2 according to move ment of the pressing plate 2.

Description

Detailed Description of the Invention A0 Object of the Invention (1) Industrial Field of Application The present invention provides a pressure receiving plate coupled to one of an input member and an output member, and a pressure receiving plate that is capable of approaching and separating from each other. The intermediate plate and the pressing plate to be connected are arranged in this order facing each other with a space between them, and between the pressure receiving plate and the intermediate plate, and between the intermediate plate and the pressing plate, there is an axial movement toward the other of the input member and the output member. A differential transmission mechanism is provided between the press plate and the intermediate plate, which reduces the movement of the press plate to half the amount of movement and transmits the transmission to the intermediate plate. The present invention relates to a multi-disc clutch.

(2) Conventional technology Conventionally, such a multi-disc clutch has been proposed, for example, in Japanese Patent Application Laid-open No. 57-1
It is known from the publication No. 07435.

(3) Problems to be Solved by the Invention In the above-mentioned conventional differential transmission mechanism, the base end of the lever is supported by a casing connected to a flywheel serving as a pressure receiving plate, and the pressing plate is connected to the tip of the lever. At the same time, the longitudinal center portion of the lever is connected to an intermediate plate, so that in response to movement of the press plate, the intermediate plate is moved by half the amount of movement of the press plate. However, in such a differential transmission mechanism, due to tolerances of each component, the distance between the connection point of the intermediate plate to the lever and the support point of the lever to the casing, and the distance between the connection point and the lever to the pressing plate. The distance between the connecting points may not match exactly, and in such cases, the amount of movement of the intermediate plate will not be exactly 1/2 of the amount of movement of the pressing plate, and the smooth operation of the multi-plate clutch will be affected. In some cases, it may not be possible to obtain accurate binding and reliable release of binding. In addition, when such a differential transmission mechanism is arranged at multiple positions along the circumferential direction of a multi-disc clutch, there is a difference in the amount of movement of the intermediate plate in each differential mechanism, and the parallelism of the intermediate plate to the pressure receiving plate is affected. As a result, vibration occurs as each clutch plate makes uneven contact, which tends to cause shudder and noise when the clutch is engaged.

The present invention has been made in view of the above circumstances, and enables smooth attachment and reliable dissociation by accurately halving the amount of movement of the intermediate plate relative to the amount of movement of the pressing plate.
It is an object of the present invention to provide a multi-disc clutch capable of suppressing the occurrence of vibration as much as possible.

B1 Structure of the Invention (1) Means for Solving the Problems According to the first feature of the present invention, the differential transmission mechanism includes a guide member connected to the pressure receiving plate and an axis perpendicular to the moving direction of the pressure plate. a rotating body that can roll on a guide member while rotating around the rotating body; a driving member that contacts the outer periphery of the rotating body and is connected to the pressing plate to rotate the rotating body in accordance with the movement of the pressing plate; and a rotating body. and a support shaft connected to the intermediate plate to rotatably support the intermediate plate.

According to the second feature of the present invention, the differential transmission mechanism is configured such that when the intermediate plate is prevented from moving by half the amount of movement of the pressing plate when the pressing plate moves toward the pressure receiving plate, According to the movement of the plate, relative movement is possible between the rotating body and the pressure receiving plate, and at least one of the rotating body and the pressing plate within a limited range along the movement direction of the pressing plate.

According to the third feature of the present invention, the guide member and the driving member are connected to the pressure receiving plate and the pressing plate while being resiliently biased in a direction in which they slide into contact with the outer surface of the rotating body.

According to the fourth feature of the present invention, the guide member and the driving member each support a sliding contact plate capable of sliding relative to the pressure receiving plate and the pressing plate along the moving direction of the pressing plate, and each sliding contact plate A spring is interposed between the guide member and the driving member to exert a biasing force on each sliding contact plate in a direction that causes frictional force to be exerted between the pressure receiving plate and the pressing plate.

Furthermore, according to the fifth feature of the present invention, the support shaft is connected to the intermediate plate so as to be movable relative to the intermediate plate in the circumferential direction.

(2) Effect According to the first feature, when the rotating body rolls on the guide member in accordance with the movement of the pressing plate, the support shaft that supports the rotating body, that is, the intermediate plate, moves the amount of rolling of the rotating body, that is, the pressing plate will surely move by half the amount of movement.

Further, according to the second feature, even if the wear on both clutch plates becomes uneven and the movement of the support shaft, that is, the intermediate plate is prevented from becoming half of that of the pressure plate, the distance between the rotating body and the pressure receiving plate, Reliable engagement can be achieved by causing relative movement between at least one of the rotating body and the pressing plate in accordance with the movement of the pressing plate.

Further, according to the third feature, a stable frictional force can be obtained by elastically sliding the guide member and the driving member against the rotating body.

Moreover, according to the fourth feature, the sliding contact plate can be elastically slid into sliding contact with the pressure receiving plate and the pressing plate side, and a stable frictional force can be obtained.

Furthermore, according to the fifth feature, even if the intermediate plate is displaced relative to the pressure receiving plate and the pressing plate in the circumferential direction, unreasonable force is prevented from acting on the differential transmission mechanism.

(3) Examples Examples of the present invention will be explained below with reference to the drawings.
First, in FIG. 1 showing the basic configuration of an embodiment of the present invention, this multi-plate clutch has a flywheel 1 as a pressure receiving plate coupled to an input member (not shown), and a flywheel 1 that is close to each other.
an intermediate plate 4 connected to the flywheel 1 in a separable manner;
and a pressing plate 2 are arranged in this order facing each other with a space between them, a first clutch plate 3 is located between the flywheel 1 and the intermediate plate 4, and a second clutch plate is located between the intermediate plate 4 and the pressing plate 2.
Clutch plates 5 are arranged, the first and second clutch plates 3.5 being connected to an output member (not shown) in an axially movable and non-rotatable manner, and between the pressing plate 2 and the intermediate plate 4. A differential transmission mechanism 6 is interposed therebetween.

The differential transmission mechanism 6 includes a guide member 7 connected to the flywheel 1, a bearing 8 as a rotating body that can roll on the guide member 7 while rotating around an axis perpendicular to the moving direction of the press plate 2. , a driving member 9 connected to the pressing plate 2 in contact with the outer periphery of the bearing 8 to rotate the bearing 8 in accordance with the movement of the pressing plate 2; and a driving member 9 connected to the intermediate plate 4 to rotatably support the bearing 8. This differential transmission mechanism 6 allows the intermediate plate 4 to move by half the amount of movement of the press plate 2 in response to the movement of the press plate 2.

The detailed structure will be described with reference to FIGS. 2, 3, 4, 5, 6, and 7. A gear 11 is fixed to the outer periphery of the flywheel 1. Further, a cover 13 is connected to the flywheel 1 via a spacer 12 with a plurality of bolts 14, and inside this cover 13,
The first clutch Fj, 3, intermediate plate 4, second clutch plate 5, and press plate 2 are housed and arranged.

The first and second clutch plates 3, 5 are formed in a ring shape, and a friction material 15 is fixedly provided on both sides of each of these clutch plates 3.5. Further, the intermediate plate 4 is supported by a spacer 12 coupled to the flywheel l at a plurality of positions in the circumferential direction via straps 16. Furthermore, press plate 2
is supported via straps 17 at a plurality of positions in the circumferential direction of the cover 13, which is connected to the flywheel l.

A diaphragm spring 18 is arranged facing an opening 13a provided on the opposite side of the flywheel 1 of the cover 13, and the peripheral edge of the diaphragm spring 18 is supported by the inner surface of the peripheral edge of the opening 13a. . Further, the pressing plate 2 is provided with a protruding contact protrusion 2a that comes into contact with the diaphragm spring 18, and by releasing the pulling operation around the center of the diaphragm spring 18, the pressing plate 2 approaches the flywheel 1. Move in the direction you want.

The differential transmission mechanism 6 is disposed at a plurality of locations, for example, three locations, along the circumferential direction of the multi-disc clutch. The support shaft 10 that supports the bearing 8 is provided in a protruding manner on a substantially U-shaped support member 22, and the support member 22 is attached to the periphery of the intermediate plate 4 in a manner that is immovable relative to the movement direction of the press plate 2 and that is attached to the periphery of the intermediate plate 4. They are fitted so that they can move relative to each other in direction.

The support shaft 10 has an axis perpendicular to the rotational axis of the intermediate plate 4, and the inner ring of the bearing 8 is 5, -
A retaining ring 23 that is fitted onto the support shaft 10 prevents the bearing 8 from falling off from the support shaft 10 . Moreover, the support member 22 has a threaded member 25 at the center of the leaf spring 24 interposed between the support member 22 and the outer peripheral surface of the intermediate plate 4.
The support member 22 is urged outward in the radial direction of the intermediate plate 4.

The guide member 7 includes a rod portion 7a having a circular cross section and a disk portion 7b integrally provided at the tip thereof, and the drive member 9 also includes a disk portion 9 at the tip of the rod portion 9a, similar to the guide member 7 described above.
b are integrally provided.

Further, the guide member 7 is supported by a support block 26 fixed to the flywheel 1 so that the disk portion 7b can slide into contact with the outer peripheral surface of the bearing 8, and the drive member 9 is supported by a support block 26 fixed to the press plate 2. The disc portion 9b is supported in sliding contact with the outer peripheral surface of the bearing 8. Support block 26
is fixed to the flywheel 1 by screw members 28, and the support block 27 is fixed to the press plate 2 by screw members 29.

In addition, each of the support blocks 26 and 27 has a bottomed guide hole 30 that opens toward the bearing 8 and has an axis that extends in a direction perpendicular to the movement direction of the press plate 2 and the axis of the support shaft 10.
．． 31 are bored respectively, and the rod portion 7 of the guide member 7
a is slidably fitted into the guide hole 30, and the rod portion 9a of the drive member 9 is slidably fitted into the guide hole 31.

A disc spring 32 is interposed between the support block 26 and the disc part 7b of the guide member 7, and a disc spring 33 is interposed between the support block 27 and the disc part 9b of the drive member 9. . Therefore, the guide member 7 and the drive member 9 are biased in a direction in which their disk portions 7b and 9b resiliently slide into contact with the outer peripheral surface of the bearing 8. Moreover, both disc springs 32 and 33
The set load exerts a frictional force between the disk portion 9b of the drive member 9 and the outer surface of the bearing 8 that is sufficient to cause the bearing 8 to roll on the disk portion 7b of the guide member 7 when the pressing plate 2 moves. At the same time, when the bearing 8 is prevented from moving toward the flywheel 1 by half the amount of movement of the pressing plate 2, the space between the bearing 8 and the disk portion 7b, and the bearing 8 and disc part 9b
The setting is set to such an extent that slippage occurs on at least one side between the two.

A friction plate 34 fitted to the support shaft 10 is interposed between the outer surface of the support member 22 and between the support blocks 26 and 27.

Next, the operation of this embodiment will be explained. When the multi-disc clutch is engaged, the diaphragm spring 18
Release the state in which the central part of the vehicle is being towed. As a result, the press plate 2 is pressed and driven toward the flywheel 1, but the movement of the press plate 2 is transmitted to the intermediate plate 4 via the differential transmission mechanism 6, and the intermediate plate 4 is Move only half of it to the flywheel 1 side. That is, as the pressing plate 2 moves, the bearing 8 rolls on the disc part 7b of the guide member 7 due to the frictional force between the disc part 9b of the drive member 9 and the outer peripheral surface of the bearing 8. The support member 22 provided with the support shaft 10 that rotatably supports the bearing 8 is
The intermediate plate 4 is made immovable relative to the direction of movement of the pressing plate 2.
Since the support shaft 10 moves by the rolling distance of the bearing 8, the intermediate Fi, 8 is moved by a distance half the distance of the movement of the press plate 2.

In this way, the support shaft 10 moves by the rolling distance of the bearing 8, so even if there are tolerances in each component, the intermediate plate 4 can be reliably moved by half the amount of movement of the pressing plate 2, and the fly can be moved. The amount of movement of the intermediate plate 4 with respect to the foil 1 and the amount of relative movement of the press plate 2 with respect to the intermediate plate 4 can be made equal, thereby realizing smooth engagement. Further, during the dissociation operation, the amount of movement of the intermediate plate 4 with respect to the flywheel l and the amount of relative movement of the press plate 2 with respect to the intermediate plate 4 are made equal, thereby achieving reliable dissociation.

Furthermore, by arranging the differential transmission mechanism 6 that can realize accurate movement of the intermediate plate 4 at multiple positions in the circumferential direction of the multi-disc clutch, the parallelism of the intermediate plate 4 to the flywheel 1 can be maintained. This can prevent shudder and noise from occurring during locking.

Also, assume that the friction material 15 on each clutch plate 3.5 is worn unevenly. For example, if the FJ friction material 15 of the second clutch plate 5 is worn out more than the friction material 15 of the first clutch plate 3, as the intermediate plate 4 comes into pressure contact with the flywheel 1 with the first clutch plate 3 in between, When the bearing 8 is prevented from moving toward the flywheel 1, as the pressing plate 2 moves, slipping occurs between the guide member 7 and the bearing 8, and between the drive member 9 and the bearing 8, and the second
The pressing plate 2 can be pressed against the intermediate plate 4 with the clutch plate 5 interposed therebetween. Also, the friction material 15 in the first clutch temporary 3
If the friction material 15 of the second clutch plate 5 is worn out more than the friction material 15 of the second clutch plate 5, the friction material 15 of the second clutch plate 5 is pressed between the intermediate plate 5 and the pressing plate 2, so that the amount of movement of the intermediate plate 5 is reduced. The pressing plate 2 is prevented from moving by half, and as a result slippage occurs between the guide member 7 and the bearing 8 and between the drive member 9 and the bearing 8, and the intermediate plate 4 is moved across the first clutch plate 3. can be pressed against the flywheel 1. Therefore, even if there is uneven wear of the friction material 15 on each clutch plate 3.5, reliable engagement can be obtained.

By the way, the relative position of the intermediate plate 4 in the circumferential direction with respect to the flywheel 1 and the press plate 2 may change due to the expansion and contraction of the strap 16. Since the plate spring 24 can be moved relative to the supporting member 22 in the circumferential direction, no unreasonable force is applied to the differential transmission mechanism 6 (the durability of the differential transmission mechanism 6 is improved). The leaf spring 24 is interposed between the plate spring 24 and the intermediate plate 4, and the frictional force caused by the leaf spring 24 acts to prevent relative movement between the intermediate plate 4 and the differential transmission mechanism 6, but this frictional force is small. , does not affect the durability of the differential transmission mechanism 6.

Further, a friction plate 34 is interposed between the support member 22 and the support blocks 26 and 27, and this friction plate 34 is fitted to the support shaft 10 so that the support member 22 along the axial direction of the intermediate plate 4 Therefore, a frictional force along the axial direction acts between the support blocks 26, 27 and the intermediate plate 4 connected to the support member 22, and vibrations along the axial direction of the intermediate plate 4 are caused. suppressed. Moreover, since centrifugal force acts on the support member 22, which increases as the rotational speed increases,
The frictional force increases as the rotational speed increases, and the vibration of the intermediate plate 4, which vibrates more easily, can be effectively suppressed.

Furthermore, since the guide member 7 and the drive member 9 are resiliently biased from both sides in the direction of sliding contact with the bearing 8, it is possible to obtain a stable frictional force between the guide member 7 and the drive member 9 against the bearing 8. These frictional forces can also suppress vibrations of the bearing 8, that is, the intermediate plate 4 along the axial direction.

FIG. 8 shows another embodiment of the present invention, in which a differential transmission mechanism 6' includes a pinion 36 as a rotating body rotatably supported by a support shaft 10 provided on the intermediate plate 4, and A guide member 7' that has a rack part 37 that meshes with the pinion 36 and is connected to the flywheel 1; and a drive member 9 that has a rack part 38 that meshes with the pinion 36 and is connected to the press plate 2.
′.

The guide member 7' and the drive member 9' are supported by shafts 39 and 40 having axes perpendicular to the movement direction of the press plate 2 and the axis of the support shaft 10 so as to be movable along their axes. , sliding contact plates 41 , 42 are respectively fitted to both ends of these shafts 39 , 40 , and each sliding contact plate 41 .
．． 42, and springs 43, 44 are interposed between the guide member 7' and the drive member 9', respectively. Moreover, each sliding contact plate 41, 42 is brought into sliding contact with the inner surface of the support hole 45, 46 provided in the flywheel 1 and the pressing plate 2 along the moving direction of the pressing plate 2.

Also in this embodiment, the pinion 36 rolls along the rack portion 37 in accordance with the movement of the pressing plate 2, and the pinion 36 rolls along the rack portion 37.
The intermediate plate 4 is moved by an amount of movement of 6, that is, half of the amount of movement of the pressing plate 2. Moreover, the pinion 36 is the pressure plate 2.
When the sliding contact plate 41, 42 and the flywheel 1 are prevented from moving toward the flywheel 1 by half of the amount of movement, the sliding contact plate 41, 42 and the flywheel 1
It is possible to cause slippage between the press plate 2 and the press plate 2.

C1 Effects of the Invention As described above, according to the first feature of the present invention, the differential transmission mechanism includes a guide member connected to the pressure receiving plate, and a guide member connected to the pressure plate while rotating around an axis perpendicular to the moving direction of the pressure plate. A rotating body that can roll on a member, a drive member that contacts the outer periphery of the rotating body and is connected to the pressing plate to rotate the rotating body in accordance with the movement of the pressing plate, and a drive member that rotatably supports the rotating body. When the rotating body rolls on the guide member according to the movement of the pressing plate, the supporting shaft that supports the rotating body, that is, the intermediate plate, adjusts the amount of rolling of the rotating body, that is, when the rotating body rolls on the guide member as the pressing plate moves. It is possible to reliably move by half of the amount of movement of the press plate, thus achieving smooth latching operation and reliable disengaging operation.

According to the second feature of the present invention, when the intermediate plate is prevented from moving by half the amount of movement of the pressing plate when the pressing plate moves toward the pressure receiving plate, According to the movement of the press plate, at least one of the rotating body and the pressure receiving plate and between the rotating body and the press plate is configured to allow relative movement within a limited range along the movement direction of the press plate. F on the clutch plate! ! Even if the wear becomes uneven, reliable engagement can be achieved by causing relative movement between the rotating body and the pressure receiving plate and at least one of the rotating body and the pressing plate in accordance with the movement of the pressing plate.

According to the third feature of the present invention, the guide member and the drive member are connected to the pressure receiving plate and the pressure plate while being resiliently biased in a direction in which they come into sliding contact with the outer surface of the rotating body. A stable frictional force can be obtained while allowing relative movement between the intermediate plate and between the rotating body and the pressing plate, and this frictional force can also have the effect of suppressing vibrations of the intermediate plate.

According to the fourth feature of the present invention, the guide member and the driving member each support a sliding contact plate that is slidable relative to the pressure receiving plate and the pressing plate along the moving direction of the pressing plate, and each sliding contact plate is supported by the guide member and the driving member. A spring is interposed between the plate, the guide member, and the drive member, each of which exerts a biasing force on each sliding plate in a direction that causes frictional force to be exerted between the pressure receiving plate and the pressing plate.
A stable frictional force can be obtained while allowing relative movement between the rotating body and the pressure receiving plate, and between the rotating body and the pressing plate, and this frictional force can also have the effect of suppressing vibrations of the intermediate plate.

Furthermore, according to the fifth feature of the present invention, the support shaft is connected to the intermediate plate so as to be movable relative to the intermediate plate in the circumferential direction, thereby avoiding unreasonable force acting on the differential transmission mechanism. However, the durability of the differential transmission mechanism can be improved.

[Brief explanation of the drawing]

1 to 7 show one embodiment of the present invention, in which FIG. 1 is a schematic diagram showing the basic configuration, FIG. 2 is a longitudinal sectional front view of the main parts of a multi-disc clutch, and FIG. Figure 4 is a sectional view taken along the ■-IV line in Figure 2, Figure 5 is a sectional view taken along the V-V line in Figure 2, and Figure 6 is a sectional view taken along the line Vl in Figure 2. -Vl line sectional view, FIG. 7 is an end view taken along ■--■ line in FIG. 2, and FIG. 8 is a schematic longitudinal sectional side view showing the basic configuration of another embodiment of the present invention.

Claims (5)

[Claims] (1) A pressure receiving plate coupled to one of the input member and the output member, and an intermediate plate and a pressing plate coupled to the pressure receiving plate so as to be able to approach and separate from each other, face each other in this order with a space between them. A clutch plate is disposed between the pressure receiving plate and the intermediate plate and between the intermediate plate and the pressing plate, and is connected to the other of the input member and the output member in an axially movable but non-rotatable manner. In a multi-disc clutch in which a differential transmission mechanism is interposed between the intermediate plates, the movement of the pressing plate is reduced to half the amount of movement and the transmission is transmitted to the intermediate plates.
The differential transmission mechanism consists of a guide member connected to a pressure plate, a rotating body that can roll on the guide member while rotating around an axis perpendicular to the direction of movement of the pressure plate, and a rotating body that rotates according to the movement of the pressure plate. A multi-plate system comprising: a drive member connected to a pressing plate in contact with the outer periphery of a rotating body to rotate the body; and a support shaft connected to an intermediate plate to rotatably support the rotating body. clutch. (2) The differential transmission mechanism rotates in accordance with the movement of the pressure plate when the intermediate plate is prevented from moving by half the amount of movement of the pressure plate when the pressure plate moves toward the pressure receiving plate. (1) characterized in that it is configured to allow relative movement within a limited range along the moving direction of the pressing plate at least between the body and the pressure receiving plate, and between the rotary body and the pressing plate;
Multi-disc clutch as described in section. (3) The multi-plate clutch according to item (2), wherein the guide member and the drive member are connected to the pressure receiving plate and the pressing plate while being elastically biased in a direction in which they slide into contact with the outer surface of the rotating body. (4) The guide member and the driving member each support a sliding contact plate that can slide relative to the pressure receiving plate and the pressing plate along the moving direction of the pressing plate, and each sliding contact plate, the guide member, and the driving member Item (2), characterized in that a spring is interposed between each sliding contact plate to exert a biasing force in a direction that causes frictional force to be exerted between the pressure receiving plate and the pressing plate. Multi-plate clutch. (5) The multi-disc clutch according to item (1), wherein the support shaft is connected to the intermediate plate so as to be movable relative to the intermediate plate in the circumferential direction.