JPH02225859A - Direct-coupled clutch for hydraulic power transmission - Google Patents

Abstract

PURPOSE:To restrain the difference of discs strongly with small number of fixings by forming a lock up piston side disc among discs so as to have a peripheral end having the equal diameter with a first driven plate in outline, and forming another disc to form a bending part having a rib near the fixing CONSTITUTION:During the operation of a torque convertor 101, the centrifugal force by the rotation works on a first and a second cushioning members 22, 23. The cushioning members 22, 23 try to open forcedly a pair of disc 17, 18 with that centrifugal force. But, since the discs 17, 18 are formed in a rib-shape with the rigidity large enough to be resistable against the force to open forcedly, these discs are never opened. Further, even if the peripheral end of the disc 17 trys to move with the centrifugal force of the cushioning member 22, a projection 17e of the peripheral end abuts to a channel bottom part 14b of a lock up piston to hinder the movement of the peripheral end of the disc 17 to left more. The projection of the cushioning member 22 is thereby prevented more surely.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fluid transmission device that transmits torque through a fluid, and particularly to a fluid transmission device that directly transmits torque mechanically. This invention relates to a direct clutch in a transmission device.

[Prior Art] Conventionally, this type of direct coupling clutch is provided with a damper mechanism in order to absorb and alleviate shocks and vibrations that occur when the direct coupled clutch is connected.

As this damper mechanism, one disclosed in Japanese Patent Laid-Open No. 61-252964 is known.

As shown in FIGS. 4 and 5, the damper mechanism 01 shown in this publication is installed in a torque converter as a fluid transmission device, and has an outer periphery attached to a drive plate 03 spline-fitted to a lock-up piston 02. A first buffer member 0 arranged on the side and consisting of a large number of compression coil springs
A first driven plate 05 is connected to the first driven plate 05 so as to be relatively slidable in the circumferential direction via the first driven plate o5. A second driven plate 08 is connected to the turbine hub 07 so as to be relatively slidable in the circumferential direction via a second buffer member 06.

Drive plate 03 and second driven brake plate 0
8 is a pair of ring-shaped disks 03a, 03a, respectively.
08a, 08a, and each of these disks has a bulge portion 03b, 03b that accommodates the first buffer member 04 or the second buffer member 06, respectively;
, 08b are formed. Further, the first driven plate 05 has a window portion 05b that accommodates the first upper and second buffer members 04 and 06.

A single ring-shaped disc 05a with 05c is also formed. Then, the first buffer member 04 is arranged in the window portion 05b of the first driven plate o5.

This first buffer member 04 is housed in the bulges 03b, 03b, and the first driven plate 05 and the first
The buffer member 04 is sandwiched from both sides by a pair of disks 03a, 03a, and the pair of disks 03a, 03a are connected by a large number of rivets 09 along the outer peripheral edge. Similarly, the first driven plate 05 and the second buffer member 06 are sandwiched between a pair of disks 08a, 08a, and the pair of disks 08a are connected by four rivets 010.

In the damper mechanism 01 configured in this way, the torque from the lock-up piston o2 is transmitted to the drive plate 03,
Since the transmission is serially transmitted to the turbine hub 07 via the first buffer member 04, first driven plate 05, second buffer member 06, and second driven plate 08,
The absorbable torque capacity can be increased without increasing the diameter of the damper mechanism o1.

[Problems to be Solved by the Invention] By the way, in such a damper mechanism 01, since it rotates at a relatively high speed during operation, a relatively large centrifugal force acts on the first and second buffer members 04 and 06. become. This centrifugal force causes the first and second buffer members 04,0
It is conceivable that 6 may fly out of their housing parts. Therefore, in this damper mechanism 01, the disk 03
a, 03a; 08a, 08a respectively as the bulge part 03
The pair of discs 03a, 03a; 08a, 08a are firmly connected by rivets 09, 010 to prevent the discs from opening.

However, in such a damper mechanism 01, a pair of disks 03a, 03 that sandwich each buffer member 04, 06 is used.
a; Not only are rivets 08a and 08a tightened on only one side of the buffer members 04 and 06, but the rigidity of the disks 03a and 08a is only increased by the bulges 03b and 08b, so the opening of the disks is difficult. cannot be said to be firmly and sufficiently suppressed.

In addition, in order to prevent the first and second shock absorbers from popping out, a disk and a rivet are required for each shock absorber, which requires a large number of rivets and requires a lot of man-hours when assembling the damper mechanism into an assembly. There is also the problem of bad sex.

The present invention has been made in view of the above circumstances, and its purpose is to reliably and more firmly suppress the opening of the disk due to the centrifugal force of the buffer member of the damper mechanism with a small number of fixing devices. It is an object of the present invention to provide a direct coupling clutch in a fluid transmission device that is capable of providing the following effects.

[Means for Solving the Problems] In order to solve these problems, the present invention provides a fluid transmission device that transmits driving torque from an input member to an output member via fluid. In a direct coupling clutch that directly connects the input member and the output member and includes a damper mechanism that absorbs and alleviates impact applied to the lock-up piston, an outer peripheral end of the damper mechanism is spline-fitted to the lock-up piston. a first drive plate connected to the drive plate via a first buffer member so as to be relatively rotatable;
The driving plate includes a driven plate and an output member connected to the first driven plate, and the first driven plate holds the first buffer member by a bulging portion formed on each of the first driven plates and bulging to one side. It also consists of a pair of disks connected to each other by a predetermined number of fasteners on the radially inner side of the first buffer member, and the disk on the lock-up piston side has a diameter that is approximately the same as that of the first driven plate. The other one of the disks has a bent portion having a rib near the fixing device, and the opening rigidity of the disk is increased by the opening of the disk on the lock-up piston side. It is said that

[Actions and Effects of the Invention] In the direct coupling clutch in the fluid transmission device of the present invention configured as described above, the damper mechanism is as follows.

a drive plate whose outer peripheral end is spline-fitted to the lock-up piston;
The first driven plate is provided with a first driven plate that is relatively rotatably connected via a buffer member, and an output member that is connected to the first driven plate, and the first driven plate has an expansion plate on one side formed on each of the first driven plates. The first shock absorbing member is held between the protruding bulges, and the first shock absorbing member is sandwiched between the first shock absorbing member and the first shock absorbing member. A disk ti has an outer circumferential end having approximately the same diameter as the first driven plate, and the other disk has a bent portion having a rib near the fixing device to increase the opening rigidity of the disk. Since the opening of the disk on the side is made higher, when the first buffer member tries to push the pair of disks apart due to centrifugal force, the disk on the lock-up piston side comes into contact with the lock-up piston. The disk on the opposite side is formed with a bent portion having ribs, thereby improving its opening rigidity.

Therefore, opening of the disk due to centrifugal force can be suppressed by using fewer fixing devices. Furthermore, since there are fewer fixing means than in the past, the number of parts is reduced, the structure becomes more compact, and productivity is improved.

[Example] Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is an overall sectional view of an automatic transmission equipped with a torque converter to which an embodiment of the present invention is applied, and FIG. 2 is a sectional view of the torque converter.

As shown in FIG. 1, automatic transmission 100 includes a torque converter 101. A planetary speed change gear mechanism 102 and a hydraulic control mechanism 103 are provided.

The driving torque from the engine is increased by the torque converter 101 at low speeds and input to the planetary transmission gear mechanism 102. The planetary transmission gear mechanism 102 automatically changes its rotation speed by being controlled by the hydraulic control mechanism 103. , is output from the output shaft 104.

As shown in FIG. 2, this torque converter 101 is
A drive plate 3 is connected to the output shaft of a power source such as an engine via a connection member 2. A pump impeller 4 is connected to the drive plate 3.

A space 5 formed by the drive plate 3 and the pump impeller 4 is filled with a working fluid such as oil. Further, a turbine impeller 6 is arranged to face the pump impeller 4, and the turbine impeller 6 is connected to a turbine hub 8 spline-fitted to an input shaft 7 of the automatic transmission 100. ing. Furthermore, a stator impeller 9 is disposed between the pump impeller 4 and the turbine impeller 6. This stator impeller 9 is a one-way clutch 10
A stator shaft, which is fixed to the not-illustrated housing of the transmission via the stator shaft, is supported so as to be rotatable in only one direction.

Further, a lock-up mechanism 12 consisting of a direct clutch is attached to the turbine hub 8.

This lock-up mechanism 12 includes a lock-up piston 14 to which a clutch friction material 13 is fixed, and a damper mechanism 15.
For example, when the vehicle speed exceeds a predetermined speed, the lock-up piston 14 operates and the friction material 13 frictionally engages with the drive plate 3, thereby directly transmitting torque mechanically. It is meant to be.

In addition, the damper mechanism 15 absorbs and alleviates shocks and vibrations that occur when the friction material 13 frictionally engages with the drive plate 3.

As shown in FIGS. 2 and 3, the damper mechanism 15 includes a drive plate 16 formed from a ring-shaped disk;
A first formed from a pair of ring-shaped discs 17.18.
It includes a driven plate 19 and a second driven plate 20 formed from a ring-shaped disc.

As in the above-mentioned publication, the drive plate 16 has a predetermined number of spline grooves 16a formed on its outer peripheral edge at approximately equal intervals in the circumferential direction, and a predetermined number of first windows 16b in the radial intermediate portion. It is perforated.

Also, a pair of disks 17 of the first driven plate 19.
18, a predetermined number of first and second bulges 17a, 17b and third and fourth bulges 18a, 18b are formed on the outer peripheral end side and the inner peripheral end side, respectively, and protrude to one side. These bulges 17a, 17b, 18
a, 18 b have second and third windows 17, respectively.
c, 17d, and fourth and fifth windows 18c, 18d, respectively, are bored in the circumferential direction. Furthermore, a pair of disks 1
A predetermined number of protrusions 17e extending radially outward are provided at the outer peripheral end of 7.18.

18e is formed. Protrusion 17e on disk 17 side
is arranged to face the groove bottom 14b formed between the teeth 14d of the lock-up piston 14.

Further, the disk 17 has a bent portion 17f continuous to the second bulging portion 17b. The height of this bent portion 17f is set to approximately the thickness of the second driven plate 20. The first and second bulging portions 17a, 17b and the bent portion 17f form the disk 17 in a ribbed shape, and its rigidity is extremely high. Similarly, the disk 18 has a third swelling part 18a.
A bent portion 18f is formed continuously. The height of this bent portion 18f is set to the thickness of the horizontal drive plate 16. Further, a flange portion 18g extending in the axial direction is formed at the inner peripheral end of the disk 18. and,
Third and fourth bulges 18a.

18b, the bent portion 18f, and the flange portion 18g, the disk 18 has a rib shape.

Its rigidity is extremely high.

A predetermined number of windows 20a are formed in the second driven plate 20, the same number as the windows 17d and 18d. In addition, the center of the second driven plate 20 is formed with a bulge 20b that protrudes to one side, and the bulge 20b has a relatively large hole 20c and a predetermined number of rivet holes around the hole 20c. 20d, 20d, . . . are bored.

The drive plate 16 has a groove 1 at its outer peripheral end.
The lock-up piston 14 is spline-fitted by fitting the teeth 14a of the lock-up piston 14 into the lock-up piston 6a. Further, the pair of disks 17 and 18 of the first driven plate 19 are arranged so as to sandwich the drive plate 16 at the outer circumference side and the second driven plate 20 at the inner circumference side. .18 is connected between the drive plate 16 and the second driven plate 20 by a predetermined number of rivets 21. In that case, a first buffer member 22 made of a compression coil spring is accommodated in the first window 16b and the first and third bulges 17a, 18a, and
second and fourth bulges 17b;

A second buffer member 23 made of a compression coil spring is housed in the recessed fitting portion 18b and the recessed fitting portion 20a. In this way, similarly to the damper mechanism described in the above-mentioned publication, the first driven plays 1 and 19 are connected to the drive plate 16 via the first buffer member 22 so as to be relatively slidable in the circumferential direction, and the first driven plate 19, a second driven plate 20 is connected via a second buffer member 23 so as to be relatively slidable in the circumferential direction.

Further, the inner peripheral end of the second driven plate 20 is fixed to the turbine hub 8 by being fastened together with the turbine impeller 6 by a rivet 24. Plate 1 like this
6, 19, and 20 are assembled, the disk 18 is attached to the peripheral wall of the bulge 20b of the second driven plate 20.
The inner peripheral flange portion 18g of the two come into contact with each other.

Next, the operation of this embodiment will be explained.

When the drive plate 3 rotates due to the drive torque from the engine, the pump impeller 4 rotates.

The rotation of the pump impeller 4 causes the working fluid to be discharged toward the turbine impeller 6. The discharged working fluid causes the turbine impeller 6 to rotate. This rotation of the turbine impeller 6 is transmitted to the input shaft 7 via the turbine hub 8, and the input shaft 7 rotates. In this case, the flow direction of the working fluid flowing out from the turbine impeller 6 is changed by the stator impeller 9, and the transmitted torque increases. Furthermore, when the rotational speed exceeds a predetermined number, the stator impeller 9 also begins to rotate, so the torque to be transmitted does not increase, and the torque converter 1 functions simply as a fluid coupling.

For example, when the vehicle speed exceeds a predetermined value, the lock-up piston 14 of the lock-up mechanism 12 operates, and the friction material 13 comes into frictional engagement with the drive plate 3. That is, the torque converter 1 enters a lock-up state. This connection drive plate 3 and turbine hub 8
are directly connected, and torque is transmitted directly to the turbine hub 8 without using fluid.

When the friction material 13 is frictionally engaged with the drive plate 3, there is a difference between the torque of the drive plate 3 and the torque of the turbine hub 8, so that shock and vibration are generated in the lock-up piston 14. In that case, the torque is the first drive plate 16, the first buffer member 22, and the first driven plate 19, which is made up of two disks. Second buffer member 23
, and the second driven plate 20 in this order. therefore.

Since the torque is received and stopped in series by the first and second buffer members 22, 23, their shocks and vibrations are effectively absorbed and alleviated.

By the way, during operation of the torque converter 101, centrifugal force due to rotation acts on the first and second buffer members 22 and 23. Due to the centrifugal force, the first and second buffer members 2
2.23 tries to push open the pair of disks 17 and 18. However, since the disks 17 and 18 are lip-shaped and have a rigidity large enough to withstand the force of pushing them open, these disks 17 and 18 will not be opened. The end is first
Even if the buffer member 22 attempts to move to the left in FIG. 2 due to the centrifugal force, the protrusion 17e on the outer circumferential end of the disc 17 comes into contact with the groove bottom 14b of the lock-up piston 14, so that the outer circumferential end of the disk 17 will not move further to the left. movement is prevented. This further reliably prevents the first buffer member 22 from popping out.

Furthermore, the protrusions 17e and 1ge of the disks 17 and 18 increase the rigidity of the disk against centrifugal force, making it possible to improve the durability of the damper mechanism 15.

Furthermore, since the torque from the lock-up piston 14 is transmitted in series to the drive plate 16, first buffer member 22, first driven plate 19, second buffer member 23, and second driven plate 20, the damper The torque capacity that can be absorbed can be increased without increasing the diameter of the mechanism 15.

Furthermore, the pair of disks 17 and 18 are connected to the first buffer member 22.
and the second buffer member 23.
Compared to conventional damper mechanisms, not only are there fewer rivets, but there is also one less press-formed part forming each disc. Therefore, the number of parts can be significantly reduced.

Note that the present invention is not limited to the above-described embodiments, and various design changes are possible.

For example, in the embodiment described above, the protrusions 17e and 18e on the outer peripheral ends of the disks 17 and 18 are both provided, but the protrusion 18e on the disk 18 may be omitted.

Moreover, in the above-mentioned embodiment, the first and second loose? ! i member 2
Although a compression coil spring is used in 2.23, other cushioning members such as rubber may also be used.

Further, in the embodiments described above, rivets are used as fasteners to connect the pair of disks, but other fasteners such as screws and bolts may also be used.

Furthermore, in the above embodiments, the present invention is explained using a torque converter as a fluid transmission device, but a fluid coupling (
It can also be applied to other fluid transmission devices such as fluid couplings).

[Brief explanation of the drawing]

FIG. 1 is a schematic overall sectional view of an automatic transmission equipped with a torque converter to which an embodiment of a direct coupling clutch in a fluid transmission device according to the present invention is applied, FIG. 2 is a sectional view of the torque converter, and FIG. The figure shows a cross-sectional view of a damper mechanism in the torque converter. FIG. 4 is a cross-sectional view of a conventional torque converter, and FIG. 5 is a diagram showing a conventional damper mechanism used in the torque converter. 1... Torque converter (fluid transmission device), 12.
...Lockup machine reef 14-...Lockup piston, 15...Damper mechanism 16-...Drive plate, 17.18-=-disk 17a, 17b, 1
8a. 18 b--Protrusion 17 e-Protrusion 17f
, 18f... bending part (rib), 19... first driven plate, 20... second driven plate, 22
...First buffer member, 23...Second buffer member patent applicant Aisin ADA Co., Ltd. (
(1 person outside)

Claims (1)

[Claims] (1) Provided in a fluid transmission device that transmits driving torque from an input member to an output member via fluid, the lock-up piston directly connects the input member and the output member, and the impact is applied to the lock-up piston. In a direct coupling clutch equipped with a damper mechanism that absorbs and alleviates It includes a first driven plate connected to each other and an output member connected to the first driven plate, and the first driven plate has a bulge portion formed on each side that bulges out to one side. It consists of a pair of disks that sandwich a buffer member and are connected to each other by a predetermined number of fasteners on the radially inner side of the first buffer member, and of these disks, the disk on the lockup piston side is connected to the first driven plate. The other disk has an outer circumferential end having approximately the same diameter as that of the lock-up piston, and the other disk has a bent portion having a rib near the fixing device, so that the opening rigidity of the disk is higher than that of the disk on the lock-up piston side. A direct coupling clutch in a fluid transmission device characterized by: