KR101457461B1 - Lockup device - Google Patents

Abstract

The lockup device 7 of the present invention is provided with a driven plate 35, a piston 30, a spring 33 and a connecting ring 60. The piston 30 is movable in the axial direction by the turbine 4 and is rotatably supported. The piston 30 is moved in the axial direction in response to a change in pressure. The connecting ring (60) is connected to the piston (30) to the driven plate (35).

Description

[0001] LOCKUP DEVICE [0002]

The present invention relates to a lockup device for mechanically connecting a turbine with a front cover of a fluid-powered power transmission apparatus.

In many cases, the fluid power transmission device is provided with a lock-up device for directly transmitting torque from the front cover to the turbine. This type of lock-up device has, for example, a piston, a back plate, a friction connection, a drive plate, a spring, and a driven plate.

The piston is supported movably in the axial direction by the front cover. A hydraulic pressure chamber is formed between the front cover and the piston. When the pressure in the hydraulic chamber changes, the piston moves in the axial direction.

The friction connecting portion is disposed between the axial direction of the piston and the back plate, and is sandwiched between the piston and the back plate when the piston moves toward the turbine side. As a result, power is transmitted from the front cover to the drive plate through the frictional connection.

The drive plate is rotatably formed with respect to the turbine, and supports the spring elastically deformably. The driven plate is elastically connected to the turbine in the rotating direction by a spring, and is fixed to the turbine (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 07-145858

In the friction portion, a so-called drag torque may occur when the operating oil flows.

It is an object of the present invention to provide a lock-up device capable of reducing a drag torque.

A lock-up device according to the present invention is disposed in a space between a front cover of a fluid power transmission device and a turbine, and is a device for mechanically connecting a front cover and a turbine. This lock-up device includes a piston, a drivable member, an elastic member, and a connecting member. The piston is movable axially and rotatably by the turbine, and moves in the axial direction in response to a change in pressure. The driven member is fixed to the turbine. The resilient member resiliently connects the piston to the driven member in the rotational direction. The connecting member connects the piston to the driven member.

In the above-described lock-up device, since the piston is connected to the driven member by the connecting member, the drag torque can be reduced.

1 is a sectional view (first embodiment) of a torque converter.
2 is a sectional view (first embodiment) of the lock-up device.
3 is a sectional view taken along the line III in Fig. 2 (first embodiment).
4 is an enlarged cross-sectional view (first embodiment) of the vicinity of the connecting ring.
5 (A) to 5 (C) are assembly explanatory views (first embodiment) of the lock-up apparatus.
6 is a sectional view (second embodiment) of the lock-up device.
7 is an enlarged cross-sectional view (second embodiment) around the connecting ring unit.
8A to 8C are assembly explanatory views (second embodiment) of the lock-up apparatus.
9 is a sectional view (third embodiment) of the lock-up device.
10 is an enlarged cross-sectional view (third embodiment) around the connecting plate.
11A to 11C are assembly explanatory views (third embodiment) of the lock-up apparatus.
12 is a sectional view (fourth embodiment) of the lock-up device.
13 is a sectional view taken along the line XIII in Fig. 6 (fourth embodiment).
14 is a plan view (fourth embodiment) of the driven plate.
Figs. 15A to 15C are assembly explanatory diagrams (fourth embodiment) of the lock-up apparatus.

[First Embodiment]

<Overall Configuration of Torque Converter>

The overall configuration of the torque converter 1 (an example of a fluid power transmission system) will be described with reference to Fig. An engine (not shown) is disposed on the left side of FIG. 1, and a transmission (not shown) is disposed on the right side of FIG. The O-O line shown in Fig. 1 is the rotational center line of the torque converter 1 and the lock-up device 7. In the first embodiment, a torque converter is described as an example of a fluid power transmission device. However, the fluid power transmission device may be another device such as a fluid joint that does not have a stator.

The torque converter 1 is a device for transmitting power from an engine-side crankshaft (not shown) to an input shaft (not shown) of a transmission, and includes a front cover 2 connected to a crankshaft An impeller 3, a turbine 4, a stator 5, and a lock-up device 7.

The front cover 2 includes an annular cover main body 10, an annular support plate 2a fixed to the cover main body 10, and a disc-shaped back plate 2b. The support plate 2a supports the second friction plate 52 (described later) of the lock-up device 7 so as to be movable in an axial direction and integrally rotatable therewith. The second friction plate 52 Respectively. The back plate 2b is disposed on the radially outer side of the support plate 2a and is arranged close to the first friction plate 51 (described later) of the lock-up device 7. In the connected state of the lock-up device 7, the back plate 2b slides with respect to the first friction plate 51. [

The impeller 3 has an impeller shell 12, a plurality of impeller blades 13, and an impeller hub 14. The impeller shell 12 is fixed to the front cover 2. A plurality of impeller blades (13) are fixed to the impeller shell (12). The impeller hub 14 is fixed to the inner peripheral portion of the impeller shell 12. A fluid chamber filled with operating oil is formed by the front cover 2 and the impeller 3.

The turbine 4 is connected to the input shaft of the transmission and is disposed in the fluid chamber opposite the impeller 3. The turbine (4) has a turbine shell (15), a plurality of turbine blades (16) and a turbine hub (17). The turbine blade (16) is fixed to the turbine shell (15). The turbine hub (17) is fixed to the inner periphery of the turbine shell (15). Specifically, the turbine hub 17 has a disk-shaped flange 17a and a turbine hub body 17b. The turbine hub body 17b is connected to the input shaft of the transmission. The flange 17a extends radially outward from the turbine hub body 17b.

The inner peripheral portion of the turbine shell 15 is fixed to the flange 17a by a plurality of rivets 18. [

The stator 5 is a mechanism for rectifying the operating fluid returning from the turbine 4 to the impeller 3 and disposed between the impeller 3 and the inner peripheral portion of the turbine 4. [ The stator 5 includes a disc-shaped stator carrier 20, a plurality of stator blades 21 provided on the outer peripheral portion of the stator carrier 20, and a one-way clutch 22 Have. The stator carrier 20 is supported on a stationary shaft (not shown) through a one-way clutch 22.

A thrust bearing 25 is provided between the front cover 2 and the turbine hub 17. A thrust bearing (26) is provided between the turbine hub (17) and the stator carrier (20). A thrust bearing (27) is provided between the stator carrier (20) and the impeller shell (12).

<Lock-up device>

1, the lock-up device 7 is a device for mechanically connecting the front cover 2 and the turbine 4, and includes a front cover 2 and a turbine 4 of the torque converter 1, As shown in Fig. 1 and 2, the lock-up device 7 includes a piston 30, a plurality of springs 33 (an example of an elastic member), a first friction plate 51, a second friction plate 52, a driven plate 35 (an example of a drivable member), and a connecting ring 60 (an example of a connecting member).

In the first embodiment, a spring is described as an example of the elastic member, but the elastic member may be another member as long as it can absorb the torsional vibration. Although the piston 30 has two members, that is, the piston body 36 and the retaining plate, the entire piston 30 may be integrally formed. In addition, the piston 30 may have three or more members Or may be constituted by members.

(1) The piston (30)

The piston 30 is arranged so as to divide the space between the front cover 2 and the turbine 4 into two in the axial direction. The space between the front cover 2 and the turbine 4 by the piston 30 is roughly divided into a first space A and a second space B. [ The piston 30 is movable in the axial direction by the turbine 4 and is rotatably supported. The piston 30 is moved in the axial direction in response to a change in pressure. Specifically, when there is a pressure difference between the first space A and the second space B, the piston 30 moves in the axial direction with respect to the front cover 2 and the turbine 4.

1, the piston 30 has a piston body 36, a retaining plate 37, and a plurality of rivets 40. As shown in Fig. The piston main body 36 is a member for pressing the first friction plate 51 and the second friction plate 52 toward the front cover 2 and the first friction plate 51 and the second friction plate 52, Of the turbine 4 of the turbine 4. The piston body 36 is axially movable and rotatably supported by the turbine hub body 17b of the turbine hub 17. [ The piston main body 36 includes a slide moving portion 30b disposed on the turbine 4 side of the second friction plate 52 and a plurality of outer circumferential claw portions 30b disposed on the outer peripheral side of the slide moving portion 30b. portion 30c, and a tubular portion 30d.

1 and 2, the slide moving portion 30b is an annular portion that presses the first friction plate 51 and the second friction plate 52 toward the front cover 2 . The slide moving portion 30b is arranged close to the second friction plate 52. [

As shown in Fig. 2, the outer peripheral claw portion 30c extends in the axial direction from the outer peripheral portion of the slide moving portion 30b. The outer peripheral claw portion 30c supports the first friction plate 51 movably in the axial direction and rotatably integrally. As shown in Fig. 3, the plurality of outer peripheral claw portions 30c are arranged at regular intervals in the circumferential direction. The tubular portion 30d is a portion slidingly moved with respect to the turbine hub body 17b of the turbine 4. [ 1, a seal ring 38 is embedded in the turbine hub body 17b, and the sliding portion of the tubular portion 30d and the turbine hub body 17b is sealed by the seal ring 38 have.

1 and 2, the retaining plate 37 is fixed to the piston body 36 by a rivet 40, and supports the spring 33 so as to be elastically deformable. More specifically, the retaining plate 37 has an annular fixed portion 37a fixed to the piston body 36 and a support portion 37b disposed on the outer peripheral portion of the fixed portion 37a. The fixed portion 37a is disposed on the turbine 4 side of the piston body 36. [ The inner peripheral portion of the fixed portion 37a is fixed to the piston main body 36. [ As shown in Figs. 2 and 3, a plurality of openings 37c are formed in the fixing portion 37a. The opening 37c is arranged at the same circumferential position as the connecting intermediate portion 62 of the connecting ring 60 and the crown portion end 63. [ The connection intermediate portion 62 is inserted into the opening 37c.

3, the opening 37c has a first opening 37e, a second opening 37f, and a third opening 37g. The first opening 37e, the second opening 37f, and the third opening 37g have. The first opening 37e is disposed at a position corresponding to the connecting intermediate portion 62 and the claw portion leading end 63 and formed slightly larger than the connecting intermediate portion 62 and the claw portion leading end 63. [ The second opening 37f is formed radially outward of the first opening 37e and is connected to the first opening 37e. The second opening 37f is formed longer in the circumferential direction than the first opening 37e and is disposed at substantially the same radial position as the annular portion 61. [ The annular portion 61 can be elastically deformed in the axial direction by forming the second opening 37f so that when the crown portion end 63 is engaged with the driven plate 35, (See Fig. 5 (C), for example). The third opening 37g is formed radially outward of the second opening 37f and is connected to the second opening 37f. The third opening 37g is longer in the circumferential direction than the second opening 37f. A part of the annular portion 61 overlaps with the third opening 37g.

As shown in Fig. 2, the support portion 37b supports the spring 33 so as to be elastically deformable in the rotating direction. The cross section of the support portion 37b is substantially C-shaped, and the spring 33 is accommodated in the support portion 37b. As shown in Figs. 2 and 3, a plurality of contact portions 37d are formed in the support portion 37b. The contact portion 37d protrudes into the support portion 37b and supports the end portion of the spring 33 in the rotation direction.

(2) Springs (33)

The spring 33 elastically connects the piston 30 and the turbine 4 in the rotating direction. The spring 33 is accommodated in the support portion 37b of the retaining plate 37. The end of the spring 33 is supported in the rotating direction by the abutting portion 37d. The spring 33 is disposed between adjacent abutting portions 37d. In addition, a projection 35c of the driven plate 35 is inserted axially between adjacent springs 33. When the piston 30 and the turbine 4 rotate relative to each other, the spring 33 is compressed in the rotating direction between the contact portion 37d and the projection 35c.

(3) Driven plate (35)

As shown in Fig. 1 or Fig. 2, the driven plate 35 is in contact with the end portion of the spring 33 in the rotating direction, and is fixed to the outer peripheral portion of the turbine 4. 2, the driven plate 35 includes an annular fixed portion 35a fixed to the turbine 4, a plurality of projections 35c capable of supporting the end portion of the spring 33, And an annular claw portion 35b provided in an inner peripheral portion of the fixed portion 35a. The projection 35c protrudes from the outer peripheral portion of the fixed portion 35a toward the piston 30 and is inserted into the support portion 37b of the retaining plate 37. [ The claw portion 35b protrudes toward the piston 30 from the inner peripheral portion of the fixed portion 35a. A clearance S is secured between the claw portion 35b and the turbine 4 in the axial direction. A connecting ring 60 is engaged in the claw portion 35b, and the claw portion end 63 of the connecting ring 60 is disposed in the gap S.

2 and 4, in consideration of the assembly of the connecting ring 60, the first tapered surface 35d is formed on the driven plate 35. As shown in Fig. The first tapered surface 35d is formed at the end of the claw portion 35b. The first tapered surface 35d is inclined with respect to the axial direction and is directed toward the piston 30 side. As shown in Figs. 5A to 5C, when the connecting ring 60 is assembled, the claw tip 63 of the connecting ring 60 is pressed against the first tapered surface 35d And is guided radially inward by the first tapered surface 35d. Assembly work will be described later.

(4) The first friction plate (51)

The first friction plate (51) is disposed between the piston (30) and the front cover (2) in the axial direction. The first friction plate 51 is disposed radially inward of the spring 33 and is axially movable with respect to the front cover 2 and rotatably disposed integrally with the front cover 2. Specifically, the first friction plate 51 is supported by the outer peripheral claw portion 30c of the piston 30 so as to be movable in the axial direction and integrally rotatable.

(5) The second friction plate (52)

The second friction plate 52 is disposed between the piston 30 and the front cover 2 in the axial direction. More specifically, the second friction plate 52 is disposed between the first friction plate 51 and the slide moving portion 30b. The second friction plate 52 is disposed radially inward of the spring 33 and is axially movable relative to the piston 30 and rotatably disposed integrally with the piston 30. The second friction plate 52 is supported by the support plate 2a of the front cover 2 so as to be axially movable and integrally rotatable.

The first friction plate 51 and the second friction plate 52 are disposed between the axial directions of the back plate 2b and the slide moving portion 30b so that the lockup device 7 is provided with three power transmission surfaces Respectively.

The numbers of the first friction plate 51 and the second friction plate 52 are not limited to one. For example, a plurality of first frictional plates 51 and second frictional plates 52 may be provided. In this case, the first friction plate 51 and the second friction plate 52 are arranged alternately in the axial direction.

(6) connecting ring (60)

2 to 4, the connecting ring 60 is formed of a plate thinner than the driven plate 35, and elastically connects the piston 30 to the driven plate 35 in the axial direction . Specifically, the connecting ring 60 is caught by the inner peripheral portion of the driven plate 35 (more specifically, the above-described claw portion 35b). The connecting ring 60 is sandwiched between the piston 30 and the driven plate 35 in a state in which a clearance is ensured.

2 to 4, the connecting ring 60 includes an annular portion 61 disposed on the front cover 2 side of the piston 30 and an annular portion 61 extending from the annular portion 61 to the turbine 4 side. And has a plurality of connecting claw portions 65 extending therefrom. The connection ring 60 is integrally formed by one plate.

3, the annular portion 61 is formed of an annular plate, and is disposed radially inward of the support portion 37b of the retaining plate 37 as shown in Figs. 2 and 4 have. The annular portion 61 is disposed radially outwardly of the outer peripheral claw portion 30c of the piston body 36. [ The annular portion 61 is thinner than the driven plate 35 and is elastically deformable in the axial direction by a relatively small force. 1, 2 and 4, the annular portion 61 is slightly elastically deformed in the axial direction, and the driven plate 35 is tensioned toward the piston 30 through the connecting claw portion 65 ). As shown in Fig. 1, in this state, the cylindrical portion 30d of the piston 30 is in contact with the turbine hub 17. Accordingly, the piston 30 is held in the axial direction at the position shown in Fig.

2 and 4, the connection claw portion 65 extends from the inner circumferential edge of the annular portion 61 toward the turbine 4 side, and is formed to be bent. Concretely, the connection claw portion 65 is formed by connecting the crown portion end 63 disposed on the opposite side of the piston 30 of the driven plate 35 to the annular portion 61 and the crown portion end 63 And has a connecting intermediate portion 62. The connecting intermediate portion 62 extends radially inwardly and axially from the inner peripheral edge of the annular portion 61 and passes through the opening 37c of the retaining plate 37. [ The connecting intermediate portion 62 is disposed radially inward of the claw portion 35b of the driven plate 35. [ At the end of the connecting intermediate portion 62, a claw tip 63 is formed.

As shown in Figs. 2 and 4, the crown tip 63 protrudes radially outward from the end of the connecting intermediate portion 62, and abuts against the claw portion 35b in the axial direction. When the piston 30 and the turbine 4 rotate relative to each other, the claw portion 35b and the crown portion end 63 slide. In consideration of assembly, a second tapered surface 63a is formed at the crown tip 63. As shown in Fig. The second tapered surface 63a is inclined with respect to the axial direction and is directed toward the turbine 4 side. 5A to 5C, when the connecting ring 60 is assembled to the driven plate 35, the first tapered surface 35d of the driven plate 35 abuts against the claw tip 35a, (63) radially inward. At this time, the second tapered surface 63a slides relative to the first tapered surface 35d. Although the first tapered surface 35d and the second tapered surface 63a are inclined at about 45 degrees with respect to the axial direction in the present embodiment, the inclination angle of the first tapered surface 35d and the second tapered surface 63a is 45 °.

<Assembling work>

Here, the assembling work of the lock-up device 7 will be described with reference to Figs. 4 and 5 (A) to 5 (C).

The thrust bearing 27, the stator 5, the thrust bearing 26 and the turbine 4 are assembled in this order in the impeller 3 and the piston 30 is inserted into the turbine hub 17 of the turbine 4 . At this time, the projection 35c of the driven plate 35 is inserted between the end portions of the spring 33.

Thereafter, as shown in Fig. 5 (A), the connecting ring 60 is assembled to the retaining plate 37 and the driven plate 35. The radial position of the connecting intermediate portion 62 and the crown tip 63 is located radially outward of the outer claw portion 30c and the radial position of the outer claw portion 30c, It's about the same. It is therefore expected that the connecting ring 60 will interfere with the outer peripheral claw portion 30c of the piston body 36 when the connecting ring 60 is assembled to the retaining plate 37 and the driven plate 35. [

3, when viewed from the axial direction, the opening 37c is disposed between the adjacent outer peripheral claw portions 30c, so that the connecting intermediate portion 62 of the connecting ring 60, And the subsidiary leading end 63 is also inserted between the adjacent outer peripheral claw portions 30c. 5 (A), the connecting claw portion 65 of the connecting ring 60 is inserted into the opening 37c (see Fig. 5 (A)) so that the connecting ring 60 does not interfere with the piston main body 36 at the time of assembling, ).

When the connecting claw portion 65 is inserted into the opening 37c, the crown portion end 63 comes into contact with the claw portion 35b as shown in Fig. 5 (A). The first tapered surface 35d is formed at the end of the claw portion 35b so that when the connecting ring 60 is press-fitted into the turbine 4, as shown in Fig. 5B, Is guided radially inward by the first tapered surface 35d so that the connecting intermediate portion 62 is bent radially inward. Since the second tapered surface 63a is formed at the end of the crown tip 63 at this time, the second tapered surface 63a slides with respect to the first tapered surface 35d and the claw tip 63 Is smoothly guided radially inward.

When the connecting claw portion 65 is again pushed into the turbine 4 side in the state that the annular portion 61 is in contact with the retaining plate 37, the claw portion end 63 is connected to the turbine 4 of the claw portion 35b And the connection intermediate portion 62 returns to the original state. In this way, the assembly of the connection ring 60 is completed.

<Operation>

Next, the operation of the torque converter 1 will be described.

When power is transmitted from the crankshaft of the engine to the front cover 2 in the state where the lock-up device 7 is disconnected, the impeller 3 rotates together with the front cover 2, And flows from the impeller 3 to the turbine 4. The flow of the hydraulic fluid causes the turbine 4 to rotate and power is transmitted to the input shaft connected to the turbine 4.

When the rotational speed of the turbine 4 reaches a predetermined level, the front cover 2 and the turbine 4 are mechanically connected by the lockup device 7. Specifically, the hydraulic control valve (not shown) is switched and the operating oil in the first space A is discharged. As a result, the pressure in the second space B becomes higher than the pressure in the first space A, and the piston 30 moves to the front cover 2 side.

When the piston 30 is moved toward the front cover 2, the gap between the front cover 2 and the piston body 36 (more specifically, between the back cover 2b and the slide moving portion 30b) The first friction plate 51 and the second friction plate 52 are fitted. As a result, the back plate 2b, the first friction plate 51, the second friction plate 52 and the slide moving portion 30b slide and move from the front cover 2 to the piston 30 &Lt; / RTI &gt; When power is transmitted to the piston 30, power is transmitted from the piston 30 to the turbine 4 through the spring 33, and the spring 33 absorbs the impact upon connection of the lock-up device 7, Finally, the piston 30 and the turbine 4 rotate integrally. Further, in the connected state of the lock-up device 7, the rotation fluctuation generated in the engine is absorbed and attenuated by the spring 33.

The front cover 2 and the piston 30 may rotate relative to each other in a state where the power is transmitted by the operating oil. When the front cover 2 and the piston 30 rotate relative to each other, the piston 30 is pulled toward the front cover 2, and by the operating oil around the first friction plate 51 and the second friction plate 52, So-called drag torque may occur.

However, in this torque converter 1, since the piston 30 is pulled toward the turbine 4 side by the connecting ring 60, the piston 30 is not easily attracted to the front cover 2. [ Therefore, generation of the drag torque can be suppressed.

[Second embodiment]

The lock-up device 107 according to the second embodiment will be described. Components having substantially the same functions as those described above are denoted by the same reference numerals, and a detailed description thereof will be omitted.

<Configuration>

In the first embodiment described above, the connecting ring 60 is an integral member, but the connecting ring 60 may be composed of a plurality of members.

For example, the lock-up device 107 shown in Fig. 6 includes a driven plate 135 (an example of a drivable member) and a connecting ring unit 160 (an example of a connecting member). 6 and 7, the driven plate 135 has a substantially annular fixed portion 135a, a plurality of claw portions 135b, and a plurality of projections 35c. The fixing portion 135a is fixed to the turbine 4. The claw portion 135b extends radially inwardly and axially from the inner peripheral portion of the fixed portion 135a. A clearance S is secured between the fixing portion 135a and the turbine 4. [ And a disc portion 163 of the connecting ring unit 160 is disposed in the gap S.

Unlike the connection ring 60 described above, the connection ring unit 160 is composed of two members. Specifically, the connection ring unit 160 has a wiring ring 165 (an example of a ring member), a wiring ring 165, and a connection ring 169 for connecting the drive plate 135.

The connection ring 169 has an annular portion 161 caught in the claw portion 135b and a plurality of connection claw portions 168 caught in the wiring ring 165. [ The annular portion 161 is disposed between the axial direction of the piston 30 and the turbine 4, and an annular plate is bent. Specifically, the annular portion 161 has a disc portion 163 and a barrel portion 162. [ The disc portion 163 is an annular plate and is disposed between the claw portion 135b of the driven plate 135 and the turbine 4. [ The disc portion 163 is axially in contact with the claw portion 135b and when the piston 30 and the turbine 4 rotate relative to each other, the claw portion 135b and the disc portion 163 slide. The cylindrical portion 162 extends from the inner peripheral edge of the disk portion 163 toward the piston 30 and is disposed radially inward of the claw portion 135b.

The plurality of connection claw portions 168 are arranged at regular intervals in the circumferential direction. The connection claw portion 168 extends from the annular portion 161 to the turbine 4 side and is formed by bending a plate-like portion protruding from the annular portion 161. Concretely, the connection claw portion 168 is formed by connecting the claw portion tip 166 disposed on the opposite side of the piston 30 of the driven plate 35 to the annular portion 61 and the claw portion tip 166 And has a connection intermediate portion 164.

The connection intermediate portion 164 extends from the barrel portion 162 to the front cover 2 side and extends obliquely outwardly from the barrel portion 162 in the radial direction. The connecting intermediate portion 164 passes through the opening 37c of the retaining plate 37. [ At the end of the connecting intermediate portion 164, a claw portion tip 166 is formed. The claw portion tip 166 is disposed on the side of the retaining plate 37 opposite to the turbine 4 (on the side of the front cover 2), and the end portion of the coupling intermediate portion 164 is bent radially inward have. The claw portion tip 166 protrudes radially inward from the end of the connecting intermediate portion 164 but is disposed radially outward of the tubular portion 162 of the annular portion 161. [

The wiring 165 is caught in the connection claw portion 168. Concretely, the wiring 165 is caught by the claw portion tip 166 and is sandwiched between the axial direction of the claw portion tip 166 and the retaining plate 37. The wiring 165 is disposed on the side of the retaining plate 37 opposite to the turbine 4 (on the side of the front cover 2).

The wire ring 165 has a C-shape in which a notch is formed and is elastically deformable in the radial direction. At the time of assembly, the wiring 165 is engaged in a plurality of connection claw portions 168 in the elastically deformed state radially inward. The claw portion tip 166 and the wiring 165 are disposed radially outward of the outer peripheral claw portion 30c. The inner diameter of the wiring ring 165 is larger than the outer diameter of the piston body 36. A clearance is secured between the claw portion tip 166 and the piston body 36 so that the wiring ring 165 can be inserted.

Further, the wiring 165 is formed of a relatively thin wire, and is elastically deformable in the axial direction by a relatively small force. The wire ring 165 is assembled in a state of being slightly elastically deformed in the axial direction.

<Assembling work>

Here, an assembling operation of the connecting ring unit 160 will be described using Figs. 8 (A) to 8 (C).

When fixing the driven plate 135 to the turbine 4, the connecting ring 169 is first hooked to the driven plate 135. The connecting ring 169 is assembled together with the turbine 4 and the driven plate 135.

The piston 30 is assembled to the turbine 4, as shown in Fig. 8 (A). At this time, the connection claw portion 168 of the connection ring 169 is inserted into the opening 37c. Next, the wiring 165 is inserted into the connection claw portion 168. At this time, since the wiring 165 has a notch, the wire ring 165, like the snap ring, is elastically deformable so that the diameter becomes small. 8 (B), when the wiring 165 is mounted, the wiring 165 is elastically deformed so as to pass through the radially inner side of the claw portion tip 166, and as shown in Fig. 8 (C) The wire ring 165 is sandwiched between the retaining plate 37 and the crown end 166 as shown in Fig. The peripheral portion of the connection claw portion 168 of the wiring ring 165 is elastically deformed toward the turbine 4 side slightly while the wiring ring 165 is fitted in the connection claw portion 168, A portion of which is inserted into the opening 37c.

Since the piston 30 is elastically connected to the turbine 4 in the axial direction by the connecting ring unit 160 in this manner, the drag torque can be reduced similarly to the connecting ring 60 described above .

[Third Embodiment]

The lock-up device 207 according to the third embodiment will be described. Components having substantially the same functions as those described above are denoted by the same reference numerals, and a detailed description thereof will be omitted.

<Configuration>

In the first and second embodiments described above, a part of the connecting ring 60 and a part of the connecting ring unit 160 are disposed on the side of the front cover 2 (on the side opposite to the turbine 4) of the piston 30 However, the connecting member may be disposed on the turbine 4 side of the piston 30.

For example, the lockup device 207 shown in Fig. 9 has a driven plate 235 (an example of a drivable member) and a connecting plate 260 (an example of a connecting member). The driven plate 235 has a substantially annular fixed portion 235a, a plurality of claw portions 235b, and a plurality of projections 35c. As shown in Figs. 9 and 10, the fixing portion 235a is fixed to the turbine 4. The claw portion 235b extends radially inwardly and axially from the inner peripheral portion of the fixed portion 235a. A clearance S is secured between the fixing portion 235a and the turbine 4. [ And the claw tip end 263 of the connecting plate 260 is disposed in the gap S.

9 and 10, the connecting plate 260 is disposed on the turbine 4 side of the piston 30 (more specifically, the retaining plate 37), and is provided on the rivet 40 And is fixed to the piston (30). Specifically, the connecting plate 260 has a connecting plate body 261 fixed to the piston 30 and a connecting claw portion 269 provided on the outer peripheral portion of the connecting plate body 261. The inner peripheral portion of the connecting plate body 261 is fixed to the retaining plate 37 and the piston body 36 by a rivet 40. [ The connecting plate body 261 is a disc-shaped portion and has a shape along the retaining plate 37. The connecting plate body 261 is thinner than the driven plate 235 and is elastically deformable in the axial direction by a relatively small force.

9 and 10, the connecting claw portion 269 is caught by the driven plate 235 and has a cylindrical connecting intermediate portion 262 and a claw portion tip end 263. The connecting intermediate portion 262 extends from the outer peripheral edge of the connecting plate body 261 toward the turbine 4 and is disposed radially inward of the claw portion 235b. The crown tip 263 is an annular portion extending radially outward from the end of the coupling intermediate portion 262 on the turbine 4 side and the end portion of the coupling intermediate portion 262 is bent. The claw end 263 is axially in contact with the claw portion 235b. In consideration of assembly, a tapered surface 263a is formed at the crown end 263. The tapered surface 263a is inclined with respect to the axial direction, and is directed toward the turbine 4 side. In this embodiment, the tapered surface 263a is inclined at about 45 degrees with respect to the axial direction.

<Assembling work>

Here, the assembling work of the connecting plate 260 will be described using Figs. 11A and 11B. Fig.

The connecting plate 260 is fixed to the piston body 36 and the retaining plate 37 by a rivet 40. Therefore, the connecting plate 260 and the piston 30 are treated as an integral assembly.

After assembly of the turbine 4, the piston 30 and the connecting plate 260 are assembled to the turbine 4. Specifically, as shown in Fig. 11 (A), the claw tip end 263 of the connecting plate 260 contacts the claw portion 235b of the driven plate 235. As shown in Fig. When the piston 30 and the connecting plate 260 are pressed into the turbine 4 side by the tapered surface 263a being formed at the claw portion tip 263, the claw portion tip 263 is pressed by the claw portion 235b And is guided inward in the radial direction so that the crown tip end 263 is inwardly radially inward of the claw portion 235b as shown in Fig. 11 (B). At this time, the connection intermediate portion 262 is elastically deformed radially inward. 11 (C), when the piston 30 and the connecting plate 260 are pressed into the turbine 4 side, the crown tip 263 is pressed against the turbine 4 side of the driven plate 235 And the claw portion tip end 263 is caught by the driven plate 235. As shown in Fig. In this way, the assembly of the connection plate 260 is completed.

Even in the connection plate 260 described above, the drag torque can be reduced.

[Fourth Embodiment]

The lockup device 307 according to the fourth embodiment will be described. Components having substantially the same functions as those described above are denoted by the same reference numerals, and a detailed description thereof will be omitted.

<Configuration>

In the first to third embodiments described above, part or all of the connecting member is disposed on the turbine 4 side of the piston 30, but the entire connecting member is disposed on the side of the front cover 2 of the piston 30 .

For example, the lockup device 307 shown in Figs. 12 to 14 has a driven plate 335 (an example of a drivable member) and a wiring 360 (an example of a connecting member). The driven plate 335 has a substantially annular fixed portion 335a, a plurality of projections 335b, and a plurality of projections 35c. The driven plate 235 is integrally formed. The fixing portion 335a is fixed to the turbine 4. The projecting portion 335b extends in the axial direction from the inner peripheral portion of the fixed portion 335a. Specifically, the protruding portion 335b has a drivable connecting portion 335d extending in the axial direction from the fixed portion 335a and a drifted claw portion 335e provided at the end of the driven connecting portion 335d. The driven connection portion 335d is inserted into the opening 37c of the retaining plate 37. [ The end portion of the drift connecting portion 335d is formed to bend inward in the radial direction of the drove closing portion 335e. The driven claw portion 335e is disposed on the side of the front cover 2 of the retaining plate 37 and extends radially inward from the end of the driven link portion 335d.

The wiring 360 elastically connects the driven plate 335 and the piston 30 in the axial direction. Concretely, the wiring 360 is caught by the projecting portion 335b, and is sandwiched between the drooping claw portion 335e and the retaining plate 37. As shown in Fig. The wiring 360 is disposed on the side of the retaining plate 37 opposite to the turbine 4 (on the side of the front cover 2). The wire ring 360 has a C-shape in which a notch 361 is formed and is elastically deformable in the radial direction. On the retaining plate 37, a positioning portion 337g protruding from the fixing portion 37a toward the front cover 2 is formed. The positioning portion 337g is formed, for example, by press working. Since the positioning portion 337g is fitted in the notch 361 of the wiring 360, the wiring 360 rotates integrally with the retaining plate 37. [

At the time of assembly, the wiring 360 is engaged with the plurality of protrusions 335b elastically deformed radially inward. The driven claw portion 335e and the wiring ring 360 are arranged radially outwardly of the outer peripheral claw portion 30c. The inner diameter of the wiring ring 360 is larger than the outer diameter of the piston body 36. [ A clearance enough to insert the wiring ring 360 is secured between the drop claw portion 335e and the piston body 36. [

Further, the wiring 360 is formed of a relatively thin wire, and is elastically deformable in the axial direction by a relatively small force. The wiring 360 is assembled in a state of being slightly elastically deformed in the axial direction. Specifically, the opening 37c is elongated in the circumferential direction, and the wire ring 360 is pulled toward the turbine 4 side by the projecting portion 335b of the driven plate 335. [ Therefore, the peripheral portion of the portion caught by the protrusion 335b of the wiring 360 is elastically deformed in the axial direction, and slightly dips into the opening 37c.

<Assembling work>

Here, the assembling work of the wiring 360 will be described using Figs. 15A to 15C.

After assembly of the turbine (4), the piston (30) is assembled to the turbine (4). As shown in Fig. 15 (A), the projecting portion 335b is inserted into the opening 37c of the retaining plate 37. As shown in Fig. 15 (B), the wiring 360 is inserted radially inward of the driven claw portion 335e in a state deformed radially inward. Thereafter, as shown in Fig. 15C, the wiring 360 is sandwiched between the retaining plate 37 and the drift claw portion 335e, and the assembly of the wiring 360 is completed.

The drag torque can be reduced even with the wiring 360 and the driven plate 335 described above.

The lock-up device according to the present invention is not limited to the first to fourth embodiments described above, and the lock-up device according to the present invention can be variously modified or modified without departing from the scope of the present invention.

[Industrial Availability]

In the above-described lock-up device, since the piston is connected to the driven member by the connecting member, the drag torque can be reduced. Thus, the above-described techniques are useful in the field of lock-up devices.

1: Torque converter (example of fluid type power transmission device)
2: Front cover
4: Turbine
7: Lock-up device
30: Piston
33: spring (an example of elastic member)
35, 135, 235, 335: a driven plate (an example of a drivable member)
36: Piston body
37: Retaining plate
51: first friction plate
52: second friction plate
60: Connection ring (example of connection member)
160: Connection ring unit (example of connection member)
260: connecting plate (an example of connecting member)
360: Wiring (example of connection member)

Claims (22)

CLAIMS 1. A lock-up device disposed in a space between a front cover of a fluid-powered power transmission device and a turbine and mechanically connecting the front cover to the turbine,
A piston axially movable by the turbine and rotatably supported and moving in an axial direction in accordance with a change in pressure;
A driven member fixed to the turbine;
An elastic member elastically connecting the piston to the driven member in a rotating direction; And
A connecting member connecting the piston to the drivable member;
Lt; / RTI &gt;
Wherein the connecting member includes an annular portion disposed on the side of the front cover of the piston and abutting against the piston, and a claw portion extending from the annular portion toward the turbine and engaged with an inner peripheral portion of the driven member. ),
Lockup device. The method according to claim 1,
Wherein the connecting member elastically connects the piston to the driven member in the axial direction. The method according to claim 1,
Wherein the connecting member is engaged with an inner peripheral portion of the drivable member. The method according to claim 1,
Wherein the connecting member is fitted with the piston and the driven member in a state in which a clearance is ensured. The method according to claim 1,
Wherein the piston has an opening formed at a position corresponding to the connection claw portion,
And the connection claw portion is inserted into the opening. 6. The method according to claim 1 or 5,
The connecting claw portion having a connecting intermediate portion extending from the annular portion toward the turbine side and a claw portion end projecting radially from an end of the connecting intermediate portion and disposed on the opposite side of the piston of the driven member, . The method according to claim 6,
The inner peripheral portion of the driven member has a first tapered surface inclined with respect to the axial direction and directed toward the piston side,
And the crown portion tip has a second tapered surface inclined with respect to the axial direction and directed toward the turbine side. The method according to claim 6,
A first friction plate which is movable in the axial direction by the piston and which is supported so as to be integrally rotatable,
Further comprising a second friction plate disposed between the piston and the first friction plate and axially movable by the front cover and supported by the first friction plate in an integrally rotatable manner,
The piston has a plurality of support portions for movably supporting the first friction plate in the axial direction,
And the connection claw portion is disposed at a position that does not overlap with the support portion in the axial direction. 9. The method of claim 8,
And the annular portion is disposed radially outward of the support portion. CLAIMS 1. A lock-up device disposed in a space between a front cover of a fluid-powered power transmission device and a turbine and mechanically connecting the front cover to the turbine,
A piston axially movable by the turbine and rotatably supported and moving in an axial direction in accordance with a change in pressure;
A driven member fixed to the turbine;
An elastic member elastically connecting the piston to the driven member in a rotating direction; And
A connecting member connecting the piston to the drivable member;
Lt; / RTI &gt;
Wherein the connecting member includes a ring member disposed on the front cover side of the piston and abutting against the piston, an annular portion disposed on the opposite side of the piston of the driven member and abutting against the driven member, And having a connection claw portion engaged with the ring member,
Lockup device. 11. The method of claim 10,
Wherein the piston has an opening formed at a position corresponding to the connection claw portion,
And the connection claw portion is inserted into the opening. The method according to claim 10 or 11,
Wherein the connection claw portion includes a connecting intermediate portion extending from the annular portion to the front cover side and a claw portion end protruding in a radial direction from an end portion of the connecting intermediate portion and disposed on the opposite side to the piston of the ring member, Device. 13. The method of claim 12,
Wherein the ring member has a C-shape in which a notch is formed. CLAIMS 1. A lock-up device disposed in a space between a front cover of a fluid-powered power transmission device and a turbine and mechanically connecting the front cover to the turbine,
A piston axially movable by the turbine and rotatably supported and moving in an axial direction in accordance with a change in pressure;
A driven member fixed to the turbine;
An elastic member elastically connecting the piston to the driven member in a rotating direction; And
A connecting member connecting the piston to the drivable member;
Lt; / RTI &gt;
Wherein the connecting member is disposed between the piston and the turbine and is fixed to the piston,
Wherein the connecting member includes a connecting member body fixed to the piston and a connecting claw portion provided on an outer circumferential portion of the connecting member body and engaged with the driving member,
The connecting claw portion has a connecting intermediate portion extending from the outer peripheral portion of the connecting member main body to the turbine side and a claw portion end extending radially outward from the end portion of the connecting intermediate portion and abutting the inner peripheral portion of the driven member in the axial direction there is,
Lockup device. 15. The method of claim 14,
Wherein the crown portion tip is inclined with respect to the axial direction and has a tapered surface facing the turbine side. CLAIMS 1. A lock-up device disposed in a space between a front cover of a fluid-powered power transmission device and a turbine and mechanically connecting the front cover to the turbine,
A piston axially movable by the turbine and rotatably supported and moving in an axial direction in accordance with a change in pressure;
A driven member fixed to the turbine;
An elastic member elastically connecting the piston to the driven member in a rotating direction; And
A connecting member connecting the piston to the drivable member;
Lt; / RTI &gt;
Wherein the drivable member has a fixed portion fixed to the turbine and a protruding portion provided on an inner peripheral portion of the fixed portion and hooked by the connecting member,
Wherein the piston has an opening formed at a position corresponding to the projection,
Wherein the protruding portion has a protruding portion,
Lockup device. 17. The method of claim 16,
Wherein the projecting portion has a drivable connection portion extending axially from the fixing portion and a drifting claw portion extending radially from the end of the driven connection portion. 18. The method of claim 17,
And the connecting member is sandwiched between the piston and the driven claw portion. delete delete delete delete

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