JP2015206452A - torque converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque converter that has high vibration damping effect of a dynamic damper while enabling a reduction in size in an axial direction.SOLUTION: A first elastic body 19 and a second elastic body 21 are disposed, in the axial direction of the torque converter 10, between a lockup clutch 17 and a turbine runner 14. The first elastic body 19 and the second elastic body 21 are arranged, in the radial direction of the torque converter 10, at some interval from each other so that they are in a positional relationship of an outer side and an inner side with respect to a rotational center axis line O. At least a third elastic body 23 constituting a dynamic damper 22, or a mass body 24 connected to an intermediate transmission member via the third elastic body 23 is disposed, in the radial direction, between the first elastic body 19 and the second elastic body 21.

Description

  The present invention relates to a torque converter.

  Conventionally, in a torque converter including one damper mechanism having an elastic body (hereinafter also referred to as a single damper mechanism), a torque provided with a dynamic damper having an elastic body and a mass body between the elastic body and the turbine runner. A converter has been proposed (see, for example, Patent Document 1).

  Further, in a torque converter including two damper mechanisms (hereinafter, also referred to as twin damper mechanisms) having elastic bodies arranged close to each other in the radial direction in the radial direction, the torque converter protrudes in the axial direction with respect to the two elastic bodies. In addition, a torque converter in which a mass body is arranged has been proposed (see, for example, Patent Document 2).

JP 2011-58557 A Special table 2011-504987 gazette

  However, in Patent Document 1, since a dynamic damper is added to the single damper mechanism, it is difficult to increase the operating angle of the dynamic damper, and the vibration damping effect of the dynamic damper is limited.

  On the other hand, in Patent Document 2, the vibration damping effect of the dynamic damper can be expected. However, in the twin damper mechanism in which two elastic bodies are arranged close to each other in the radial direction, two elastic bodies and a mass body are arranged in the axial direction. Since they are arranged in a line, there is a risk of increasing the size in the axial direction.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a torque converter having a high vibration damping effect of a dynamic damper while enabling downsizing in the axial direction.

In order to achieve the above object, the invention described in claim 1
A pump impeller (for example, a pump impeller 12 of the embodiment described later) connected to a drive shaft (for example, a crankshaft 11 of an embodiment described later) and a driven shaft (for example, an input shaft 13 of an embodiment described later) are connected. A turbine runner (for example, a turbine runner 14 of the embodiment described later), and a circulation path (for example, a circulation path 15 of the embodiment described later) formed between the pump impeller and the turbine runner. A torque converter (for example, torque converters 10, 10 </ b> A, 10 </ b> B according to an embodiment described later) that circulates fluid and transmits rotational power from the pump impeller to the turbine runner via the fluid,
A lock-up clutch (for example, a lock-up clutch 17 in an embodiment described later) and a damper mechanism (for example, a damper mechanism 18 in an embodiment described later) that can mechanically couple the driven shaft and the drive shaft; In addition,
The damper mechanism is connected to the lockup clutch and is connected to an intermediate transmission member (for example, an intermediate transmission member 20 in an embodiment described later) (for example, a first elastic body in an embodiment described later). 19), a second elastic body connected to the intermediate transmission member and connected to the driven shaft (for example, a second elastic body 21 in an embodiment described later), and a dynamic damper connected to the intermediate transmission member (For example, a dynamic damper 22 of an embodiment described later),
The intermediate transmission member includes a turbine runner,
The dynamic damper includes a third elastic body (for example, a third elastic body 23 in an embodiment described later) and a mass body (for example, an embodiment described later) connected to the intermediate transmission member via the third elastic body. A mass body 24) of
The first elastic body and the second elastic body are disposed between the lock-up clutch and the turbine runner in the axial direction of the torque converter,
The first elastic body and the second elastic body have a positional relationship between an outer side and an inner side with respect to a rotation center axis (for example, a rotation center axis O in an embodiment described later) in the radial direction of the torque converter. Are spaced apart from each other,
At least one of the third elastic body and the mass body constituting the dynamic damper is disposed between the first elastic body and the second elastic body in the radial direction.

The invention according to claim 2 is the invention according to claim 1,
Both the third elastic body and the mass body constituting the dynamic damper are arranged between the first elastic body and the second elastic body in the radial direction,
The mass body is disposed outside the third elastic body in the radial direction.

The invention according to claim 3 is the invention according to claim 1,
The mass body is disposed outside the first elastic body in the radial direction,
The third elastic body is disposed between the first elastic body and the second elastic body in the radial direction.

Furthermore, the invention according to claim 4 is any one of claims 1 to 3,
At least one of the third elastic body and the mass body constituting the dynamic damper is one of the first elastic body and the second elastic body positioned on the lock-up clutch side in the axial direction. The elastic body is disposed between the lock-up clutch side edge of the elastic body and the turbine runner side edge of the other elastic body located on the turbine runner side.

  According to the first aspect of the invention, the damper mechanism is a twin damper having the first elastic body and the second elastic body, and the dynamic damper is provided in the intermediate transmission member, so that the effect of the dynamic damper is improved. Can do. Further, by interposing the turbine runner as an intermediate transmission member in the power transmission path between the first elastic body and the second elastic body, a space is provided between the first elastic body and the second elastic body in the radial direction. Thus, at least one of the third elastic body and the mass body of the dynamic damper can be disposed in this space. Thereby, a torque converter can be reduced in size in an axial direction.

  According to the second aspect of the present invention, the torque converter can be downsized not only in the axial direction but also in the radial direction.

  According to invention of Claim 3, a big damping effect is acquired by arrange | positioning a mass body on the radial direction outer side. In addition, when the mass body has a damping effect equivalent to that in the case where the mass body is arranged on the radially inner side, the mass body can be reduced, so that the torque converter can be reduced in size and weight.

  According to the torque converter of the fourth aspect of the present invention, the torque converter can be further downsized in the axial direction.

1 is a cross-sectional view showing a torque converter according to a first embodiment of the present invention. It is a schematic diagram which shows the vibration model of the torque converter of FIG. It is sectional drawing which shows the torque converter which concerns on 2nd Embodiment. It is sectional drawing which shows the torque converter which concerns on 3rd Embodiment. It is a graph which shows the vibration damping effect of a damper mechanism.

  Embodiments of a torque converter according to the present invention will be described below with reference to the drawings.

<First Embodiment>
FIG. 1 shows a torque converter 10 according to a first embodiment of the present invention.
The torque converter 10 of this embodiment is a torque converter mounted on a vehicle such as an automobile, for example, and is interposed between a crankshaft 11 of an engine (not shown) and an input shaft 13 of a transmission (not shown). Then, the rotational power input to the crankshaft 11 is transmitted to the input shaft 13.

  The torque converter 10 includes a pump impeller 12 connected to the crankshaft 11 and a turbine runner 14 connected to an input shaft 13 arranged coaxially with the crankshaft 11. The pump impeller 12 and the turbine runner 14 are arranged to face each other and have a substantially spindle shape in cross section. A circulation path 15 for circulating a fluid such as oil generally called fluid is formed between the two. A fluid is circulated through the circulation path 15, and rotational power is transmitted from the pump impeller 12 to the turbine runner 14 via the fluid.

  Furthermore, the torque converter 10 is provided between the pump impeller 12 and the turbine runner 14 and includes a stator 35 positioned on the circulation path 15. The stator 35 converts the flow direction of the fluid circulating in the circulation path 15 and amplifies the torque.

  The shell 26 of the pump impeller 12 is joined to a cover 27 that covers the turbine runner 14 by welding or the like. A plurality of fastening bosses 28 are arranged in the circumferential direction on the outer peripheral surface of the cover 27, and a drive plate 29 is fastened to these fastening bosses 28. The drive plate 29 is fastened to the crankshaft 11 via fastening means such as bolts. The pump impeller 12 is connected to the crankshaft 11 via the cover 27 and the drive plate 29 and rotates integrally with the crankshaft 11.

  The shell 30 of the turbine runner 14 is connected to a turbine hub 31 that is spline-fitted to the input shaft 13 via a damper mechanism 18 described later. A thrust bearing 32 is provided between the turbine hub 31 and the cover 27. An output member 55 is joined to the turbine hub 31 by welding or the like, and the output member 55 rotates integrally with the turbine hub 31.

  A cylindrical stator shaft 33 is disposed coaxially with the input shaft 13 on the outer periphery of the input shaft 13. The stator shaft 33 supports a hub 36 of the stator 35 via a one-way clutch 34. The stator shaft 33 is supported in a state in which, for example, an end thereof is fixed to a transmission case and does not rotate. A thrust bearing 37 is provided between the hub 36 of the stator 35 and the shell 26 of the pump impeller 12.

  A working chamber 39 communicating with the circulation path 15 is formed between the turbine runner 14 and the cover 27. The torque converter 10 includes a lockup clutch 17 capable of mechanically coupling the input shaft 13 and the cover 27, and the lockup clutch 17 includes a clutch piston 40 provided in an operation chamber 39. Yes. The clutch piston 40 is formed in an annular shape, the turbine hub 31 is inserted through the clutch piston 40, and the inner peripheral portion is rotatably supported by the turbine hub 31. The clutch piston 40 can slide in the axial direction on the outer peripheral surface of the turbine hub 31.

  Further, the clutch piston 40 divides the working chamber 39 into an inner working chamber 41 on the turbine runner 14 side and an outer working chamber 42 on the cover 27 side, and both the working chambers 41, 42 are outside the clutch piston 40. The clearances 43 formed between the peripheral edge and the inner peripheral surface of the cover 27 communicate with each other. An annular friction lining 44 is attached to one side surface of the clutch piston 40 that faces the inner side surface of the cover 27.

  The torque converter 10 is provided with a damper mechanism 18 between the turbine runner 14 and the lockup clutch 17 in the axial direction.

  The damper mechanism 18 is connected to the lockup clutch 17 and the first elastic body 19 connected to the intermediate transmission member 20. The damper mechanism 18 is connected to the intermediate transmission member 20 and connected to the input shaft 13 via the output member 55. A second elastic body 21 and a dynamic damper 22 connected to the intermediate transmission member 20. The intermediate transmission member 20 includes the turbine runner 14 and a holding member 53 described later.

  A plurality of first elastic bodies 19 are arranged side by side in the circumferential direction in an annular housing recess 51 formed at the outer peripheral edge of the clutch piston 40 of the lockup clutch 17. Each first elastic body 19 can be elastically deformed in a circumferential direction or a tangential direction of the circumference. For example, a coil spring or the like is used as the first elastic body 19. Each first elastic body 19 is sandwiched along the circumferential direction of the housing recess 51 by the locking claws 45 and 46 respectively fixed to the clutch piston 40 and the shell 30 of the turbine runner 14. Therefore, when the clutch piston 40 and the shell 30 of the turbine runner 14 rotate relative to each other, the first elastic bodies 19 are compressed between the locking claws 45 and 46. As a reaction of compression of the first elastic body 19, the elastic reaction force of the first elastic body 19 acts on the clutch piston 40 and the shell 30, thereby transmitting rotational power from the clutch piston 40 to the shell 30.

  The second elastic body 21 is disposed in each of the plurality of accommodation holes 47 formed in the output member 55 in the circumferential direction, and can be elastically deformed in the circumferential direction or the tangential direction of the circumference. For example, a coil spring or the like is used as the second elastic body 21.

  The holding member 53 includes a pair of holding members 53a and 53b. The turbine hub 31 is inserted into the inner peripheral portion of the holding member 53, and the output member 55 joined to the turbine hub 31 is sandwiched from the front and back sides only in the radial direction. Has been placed. The pair of holding members 53 a and 53 b are integrated by a plurality of fastening members 52 on the radially outer side and the radially inner side of the housing hole 47 that houses the second elastic body 21.

  The output member 55 is formed with a through hole 59 through which the fastening member 52 is inserted. In each through hole 59, a cylindrical spacer 54 is interposed between the pair of holding members 53a and 53b to secure a gap between the holding members 53a and 53b and the front and back surfaces of the output member 55. It is inserted with. Each through hole 59 has a predetermined length in the circumferential direction, and the fastening member 52 and the spacer 54 fitted on the fastening member 52 can be displaced in the circumferential direction in the through hole 59. Yes. Therefore, the output member 55 can rotate relative to the holding member 53 and the turbine runner 14 within a range of a predetermined twist angle.

  The holding member 53b on the turbine runner 14 side has its inner peripheral edge adjacent to the inner peripheral edge of the shell 30 of the turbine runner 14, and the radially inner fastening member 52 includes a pair of holding members 53a, 53b and The shell 30 of the turbine runner 14 is also fastened together with the output member 55. Accordingly, the holding member 53 rotates integrally with the shell 30 of the turbine runner 14.

  The holding member 53 b on the turbine runner 14 side extends further radially inward from the inner peripheral edge of the shell 30 along the turbine hub 31, and a thrust bearing 38 is provided between the holding member 53 b and the hub 36 of the stator 35. Is provided.

  The holding member 53 is formed with accommodation holes 56 that accommodate the second elastic bodies 21 at positions corresponding to the accommodation holes 47 with the output member 55 interposed therebetween.

  As a result, when the shell 30 of the turbine runner 14 rotates, relative rotation occurs between the holding member 53 that rotates integrally with the shell 30 and the output member 55, and the second elastic body 21 has one end of the output member 55. While being supported by the edge of the accommodation hole 47 and being supported by the edge of the accommodation hole 56 of the holding member 53, the other end is elastically compressed between the output member 55 and the holding member 53. As a reaction of the compression of the second elastic body 21, the elastic reaction force of the second elastic body 21 acts on the holding member 53 and the output member 55, whereby rotational power is transmitted from the holding member 53 to the output member 55. The

  Further, of the pair of holding members 53a and 53b, the holding member 53b positioned on the turbine runner 14 side has a locking claw 58 formed at the distal end portion extending radially outward.

  In the turbine hub 31, the mass body holding member 57 cannot move in the axial direction on the outer peripheral surface of the turbine hub 31 on the side opposite to the turbine runner 14 side with respect to the output member 55, that is, on the clutch piston 40 side. It is provided so as to be rotatable. The mass body holding member 57 extends radially outward between the holding member 53 a and the clutch piston 40, and a plurality of annular housing recesses 60 are formed on the outer peripheral edge portion located on the radially inner side of the first elastic body 19. ing. The mass body 24 is fixed to the outer side in the radial direction of the housing recess 60 by welding or the like. The mass body 24 is disposed in a space defined by the mass body holding member 57, the first elastic body 19, the locking claw 46, and the shell 30. A surface of the mass body 24 facing the first elastic body 19 is curved along the first elastic body 19.

  A third elastic body 23 is disposed in each of the plurality of receiving recesses 60. The third elastic body 23 can be elastically deformed in the circumferential direction or the tangential direction of the circumference. For example, a coil spring or the like is used as the third elastic body 23.

  Each third elastic body 23 is sandwiched along the circumferential direction of the housing recess 60 by a locking claw 58 and a locking claw (not shown) fixed to the holding member 53b and the mass holding member 57, respectively.

  Thus, when the turbine runner 14 (holding member 53) rotates, relative rotation occurs between the holding member 53 and the mass body holding member 57, and one end of the third elastic body 23 is supported by the locking claw 58. At the same time, the other end is supported by a locking claw (not shown), whereby the holding member 53 and the mass body holding member 57 are elastically compressed. As a reaction of compression of the third elastic body 23, the elastic reaction force of the third elastic body 23 acts on the holding member 53, thereby exhibiting a damping function as a dynamic damper.

  The torque converter 10 configured as described above is connected to a pump (not shown) that supplies fluid, and fluid is exchanged between the torque converter 10 and the pump. The fluid supplied from the pump is a first flow path 48 between the shell 26 of the pump impeller 12 and the hub 36 of the stator shaft 33 and the stator 35, or a second flow between the turbine hub 31 and the cover 27. The fluid flows into the circulation path 15 and the working chamber 39 communicating with the circulation path 15 through the path 49 to fill the circulation path 15 and the working chamber 39. Switching between the first flow path 48 and the second flow path 49 is performed by controlling a valve provided on the pump side.

  In the working chamber 39, a differential pressure is generated between the inner working chamber 41 and the outer working chamber 42 by a clearance 43 that communicates both the working chambers 41, 42.

  When the fluid flows into the working chamber 39 and the circulation path 15 through the second flow path 49, the outer working chamber 42 has a higher pressure than the inner working chamber 41. As a result, the clutch piston 40 moves backward toward the turbine runner 14 to separate the friction lining 44 from the inner surface of the cover 27. Thereby, the lockup clutch 17 is disconnected. At this time, the rotational power of the crankshaft 11 is transmitted from the crankshaft 11 to the pump impeller 12 via the drive plate 29 and the cover 27, and the turbine runner 14 via the fluid circulating in the circulation path 15 from the pump impeller 12. Then, the power is transmitted from the turbine runner 14 (holding member 53) to the output member 55, the turbine hub 31, and the input shaft 13 through the second elastic body 21 of the damper mechanism 18.

  On the other hand, when the fluid flows into the circulation path 15 and the working chamber 39 through the first flow path 48, the inner working chamber 41 has a higher pressure than the outer working chamber 42. As a result, the clutch piston 40 moves forward to the cover 27 side and frictionally engages the friction lining 44 with the inner surface of the cover 27. Thereby, the lockup clutch 17 is connected, and the input shaft 13 is directly connected to the crankshaft 11 and locked up. At this time, the rotational power of the crankshaft 11 is transmitted from the crankshaft 11 to the turbine runner 14 via the drive plate 29, the cover 27, the lockup clutch 17, and the first elastic body 19 of the damper mechanism 18. Is transmitted from the holding member 53) to the output member 55, the turbine hub 31, and the input shaft 13 through the second elastic body 21 of the damper mechanism 18. In this way, the input shaft 13 is directly connected to the crankshaft 11 by the lock-up, in other words, the input shaft 13 is mechanically connected without any fluid, and transmission loss due to fluid slip can be eliminated.

  The holding member 53 that rotates integrally with the shell 30 of the turbine runner 14 is provided with a mass body 24 via a third elastic body 23. In the locked-up state, the torsional vibration of the crankshaft 11 is transmitted to the crankshaft 11 through the same path as the rotational power. Referring to FIG. 2, on the power transmission path between cover 27 and output member 55, lockup clutch 17 is provided between cover 27 and clutch piston 40, and includes turbine runner 14 and holding member 53. A first elastic body 19 is provided on the upstream side and a second elastic body 21 is provided on the downstream side with the intermediate transmission member 20 interposed therebetween. The intermediate transmission member 20 further includes a third elastic body 23 and a mass body 24. Since the dynamic damper 22 is provided, the intermediate transmission member 20 is excited with phase lag or antiphase vibration. Thereby, the vibration transmitted to the input shaft 13 is attenuated or canceled.

In FIG. 5, the dotted line shows the damping rate in the torque converter 10 of the first embodiment, and the solid line shows the damping rate in the torque converter of the twin damper mechanism that does not have the dynamic damper 22.
As apparent from FIG. 5, according to the torque converter 10 of the first embodiment, a large damping rate can be obtained as compared with a torque converter having a twin damper mechanism that does not have the dynamic damper 22.

Here, the arrangement of the dynamic damper 22, particularly the relationship between the first elastic body 19 and the second elastic body 21, will be described in more detail.
The first elastic body 19 and the second elastic body 21 are disposed so as to partially overlap each other in the axial direction between the lockup clutch 17 and the turbine runner 14 in the axial direction of the torque converter 10. The body 19 and the second elastic body 21 are arranged at a distance from each other so as to have a positional relationship between the outer side and the inner side with respect to the rotation center axis O in the radial direction of the torque converter 10.

  The third elastic body 23 and the mass body 24 constituting the dynamic damper 22 are disposed between the outermost diameter portion of the first elastic body 19 and the innermost diameter portion of the second elastic body 21, and further, Of the mass body 24, the third elastic body 23 is located between the first elastic body 19 and the second elastic body 21 in the radial direction, that is, the innermost diameter portion of the first elastic body 19 and the second elastic body 21. It is arrange | positioned between outermost diameter parts.

  The third elastic body 23 includes, in the axial direction, an end edge of the first elastic body 19 on the lock-up clutch 17 side, which is located on the lock-up clutch 17 side of the first elastic body 19 and the second elastic body 21, and the turbine. Between the turbine runner 14 side edge of the 2nd elastic body 21 located in the runner 14 side, it arrange | positions so that the overlap part of the 1st elastic body 19 and the 2nd elastic body 21 may be straddled.

  Thus, by interposing the turbine runner 14 as the intermediate transmission member 20 in the power transmission path between the first elastic body 19 and the second elastic body 21, the first elastic body 19 and the second elastic body 20 are arranged in the radial direction. A space is generated between the elastic body 21 and the third elastic body 23 of the dynamic damper 22 can be disposed in this space. Thereby, the torque converter 10 can be reduced in size in the axial direction. The mass body 24 may be disposed between the first elastic body 19 and the second elastic body 21 instead of the third elastic body 23, and both the third elastic body 23 and the mass body 24 are disposed. May be.

Second Embodiment
Next, a torque converter 10A according to a second embodiment of the present invention will be described with reference to FIG. In the following description, the same or similar parts as those of the torque converter 10 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In this torque converter 10A, a housing 61 having a housing recess 51 for housing the first elastic body 19 is joined to the shell 30 of the turbine runner 14 by welding or the like, and between the clutch piston 40 and the cover 27, A disc plate 63 having an L-shaped cross section with friction linings 44 attached to both sides is provided. A locking claw 45 extends from the outer peripheral end of the disc plate 63 toward the first elastic body 19. The first elastic body 19 has one end supported by the locking claw 45 and the other end supported by a locking claw (not shown) fixed to the container 61, whereby the disc plate 63 and the turbine runner are supported. The 14 shells 30 are elastically compressed.

  The holding member 53b on the turbine runner 14 side is integrally formed with a housing recess 65 that extends radially outward and houses the third elastic body 23 at the tip. A locking claw 58 extends from the outer peripheral end portion of the mass body holding member 57 toward the third elastic body 23.

  The mass body holding member 57 extends radially outward between the holding member 53a and the clutch piston 40, and the mass body 24 is fixed to the outer peripheral edge portion by a rivet or the like. The mass body 24 is disposed in a space defined by the mass body holding member 57, the first elastic body 19, the locking claw 45, and the housing body 61.

  Also in the torque converter 10A configured in this manner, when the turbine runner 14 (holding member 53) rotates, relative rotation occurs between the holding member 53 and the mass body holding member 57, and the third elastic body 23 is One end is supported by the locking claw 58 and the other end is supported by a locking claw (not shown), whereby the holding member 53 and the mass body holding member 57 are elastically compressed. As a reaction of compression of the third elastic body 23, the elastic reaction force of the third elastic body 23 acts on the holding member 53, thereby exhibiting a damping function as a dynamic damper. Also in the torque converter 10A of the second embodiment, an attenuation equivalent to the attenuation factor in the torque converter 10 of the first embodiment shown by the dotted line in FIG. 5 is obtained.

  Further, the first elastic body 19 and the second elastic body 21 are arranged so that a part thereof overlaps in the axial direction between the lockup clutch 17 and the turbine runner 14 in the axial direction of the torque converter 10A. The 1st elastic body 19 and the 2nd elastic body 21 are arrange | positioned mutually spaced apart so that it may become a positional relationship of the outer side and inner side with respect to the rotation center axis line O in the radial direction of the torque converter 10A.

  The third elastic body 23 and the mass body 24 constituting the dynamic damper 22 are disposed between the outermost diameter portion of the first elastic body 19 and the innermost diameter portion of the second elastic body 21, and further, Of the mass body 24, the third elastic body 23 is located between the first elastic body 19 and the second elastic body 21 in the radial direction, that is, the innermost diameter portion of the first elastic body 19 and the second elastic body 21. It is arrange | positioned between outermost diameter parts.

  The third elastic body 23 includes, in the axial direction, an end edge of the second elastic body 21 on the lock-up clutch 17 side and the turbine, which are located on the lock-up clutch 17 side of the first elastic body 19 and the second elastic body 21. Between the turbine runner 14 side edge of the 1st elastic body 19 located in the runner 14 side, it arrange | positions so that the overlap part of the 1st elastic body 19 and the 2nd elastic body 21 may be straddled. Therefore, also in this embodiment, the same effect as the torque converter 10 of the first embodiment can be obtained.

<Third Embodiment>
Next, a torque converter 10B according to a third embodiment of the present invention will be described with reference to FIG. In the following description, the same or similar parts as those of the torque converter 10 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In this torque converter 10B, a housing 61 having a housing recess 51 for housing the first elastic body 19 is joined to the shell 30 of the turbine runner 14 by welding or the like, and between the clutch piston 40 and the cover 27, A disc plate 63 having an L-shaped cross section with friction linings 44 attached to both sides is provided. A locking claw 45 extends from the outer peripheral end of the disc plate 63 toward the first elastic body 19. The first elastic body 19 has one end supported by the locking claw 45 and the other end supported by a locking claw (not shown) fixed to the container 61, whereby the disc plate 63 and the turbine runner are supported. The 14 shells 30 are elastically compressed.

  In addition, the holding member 53 has an accommodation hole 67 for accommodating the third elastic body 23 at a position corresponding to the accommodation hole 71 of the relay member 70 for accommodating the third elastic body 23 with the relay member 70 interposed therebetween. It is formed outside in the direction. The relay member 70 can rotate relative to the holding member 53 within a predetermined twist angle range, and the third elastic body 23 is elastically compressed between the holding member 53 and the relay member 70. . The radially outer end portion of the relay member 70 extends toward the clutch piston 40 side and engages with the mass body holding member 57.

  The mass body holding member 57 extends radially outward from the locking claw 45 of the disc plate 63, and the mass body 24 is fixed to the outer peripheral edge so as to face the inner peripheral surface of the cover 27. The mass body 24 is disposed in a space defined by the mass body holding member 57, the first elastic body 19, and the cover 27.

  Also in the torque converter 10B configured in this manner, when the turbine runner 14 (holding member 53) rotates, relative rotation occurs between the holding member 53, the relay member 70, and the mass body holding member 57, and the third The elastic body 23 is supported by the edge of the accommodation hole 71 of the relay member 70, and the other end is supported by the edge of the accommodation hole 67 of the holding member 53, so that the elastic body 23 is interposed between the relay member 70 and the holding member 53. Elastically compressed. As a reaction of compression of the third elastic body 23, the elastic reaction force of the third elastic body 23 acts on the holding member 53, thereby exhibiting a damping function as a dynamic damper.

  Further, the first elastic body 19 and the second elastic body 21 are arranged so that a part thereof overlaps in the axial direction between the lockup clutch 17 and the turbine runner 14 in the axial direction of the torque converter 10B. The 1st elastic body 19 and the 2nd elastic body 21 are arrange | positioned mutually spaced apart so that it may become a positional relationship of the outer side and inner side with respect to the rotation center axis line O in the radial direction of the torque converter 10B.

  The third elastic body 23 constituting the dynamic damper 22 is disposed between the outermost diameter portion of the first elastic body 19 and the innermost diameter portion of the second elastic body 21, and further, the third elastic body 23 is arranged in the radial direction. The first elastic body 19 is disposed between the outermost diameter portion of the first elastic body 19 and the outermost diameter portion of the second elastic body 21. The third elastic body 23 includes, in the axial direction, an end edge of the second elastic body 21 on the lock-up clutch 17 side and the turbine, which are located on the lock-up clutch 17 side of the first elastic body 19 and the second elastic body 21. It arrange | positions between the turbine runner 14 side edge of the 1st elastic body 19 located in the runner 14 side.

  Furthermore, since the mass body 24 is disposed radially outside the first elastic body 19, more specifically, radially outside the innermost diameter portion of the first elastic body 19, the first and second embodiments are provided. A damping effect greater than that of the torque converter 10 or 10A of the embodiment can be obtained. The attenuation rate indicated by the alternate long and short dash line in FIG. 5 indicates the attenuation rate of the torque converter 10B of the third embodiment.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.

10, 10A, 10B Torque converter 11 Crankshaft (drive shaft)
12 Pump impeller 13 Input shaft (driven shaft)
14 turbine runner 15 circulation path 17 lock-up clutch 18 damper mechanism 19 first elastic body 20 intermediate transmission member 21 second elastic body 22 dynamic damper 23 third elastic body 24 mass body O rotation center axis

Claims (4)

A pump impeller coupled to the drive shaft, and a turbine runner coupled to the driven shaft, wherein fluid is circulated through a circulation path formed between the pump impeller and the turbine runner, and the fluid is passed through the fluid. A torque converter in which rotational power is transmitted from the pump impeller to the turbine runner;
A lockup clutch capable of mechanically coupling the driven shaft and the drive shaft, and a damper mechanism;
The damper mechanism includes a first elastic body connected to the lockup clutch and connected to the intermediate transmission member, a second elastic body connected to the intermediate transmission member and connected to the driven shaft, A dynamic damper connected to the intermediate transmission member,
The intermediate transmission member includes a turbine runner,
The dynamic damper includes a third elastic body, and a mass body coupled to the intermediate transmission member via the third elastic body,
The first elastic body and the second elastic body are disposed between the lock-up clutch and the turbine runner in the axial direction of the torque converter,
The first elastic body and the second elastic body are arranged at a distance from each other so as to be in a positional relationship between the outer side and the inner side with respect to the rotation center axis in the radial direction of the torque converter,
A torque converter in which at least one of the third elastic body and the mass body constituting the dynamic damper is disposed between the first elastic body and the second elastic body in the radial direction. . The torque converter according to claim 1,
Both the third elastic body and the mass body constituting the dynamic damper are arranged between the first elastic body and the second elastic body in the radial direction,
The mass converter is a torque converter arranged outside the third elastic body in the radial direction. The torque converter according to claim 1,
The mass body is disposed outside the first elastic body in the radial direction,
The torque converter, wherein the third elastic body is disposed between the first elastic body and the second elastic body in the radial direction. The torque converter according to any one of claims 1 to 3,
At least one of the third elastic body and the mass body constituting the dynamic damper is one of the first elastic body and the second elastic body positioned on the lock-up clutch side in the axial direction. A torque converter disposed between a lock-up clutch side edge of the elastic body and a turbine runner side edge of the other elastic body located on the turbine runner side.

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