JP7149737B2 - Damper and torque converter - Google Patents

Description

The present invention relates to a damper of a torque transmission device interposed between, for example, a crankshaft of an engine and an input shaft of a transmission, and a torque converter provided with the damper.

In a torque converter incorporated in an automatic transmission for a vehicle, the front part (front cover) of the converter housing is rotationally driven by the crankshaft of the engine. Torque is transmitted from the output shaft driven by the turbine runner to the input shaft of the transmission.

The torque converter further has a lockup device that directly transmits the torque of the crankshaft of the engine to the transmission without going through the pump impeller and turbine runner in order to improve fuel efficiency. The lock-up device connects (locks up) the front cover of the converter housing and the output shaft with a clutch driven by fluid pressure (hydraulic pressure) to transfer the torque of the engine's crankshaft to the transmission's input shaft. communicate directly to

However, when lockup is performed between the front cover and the output shaft having different rotational speeds (angular velocities), torsional vibration occurs due to torque fluctuations at the time of lockup. Therefore, in the torque converter, a damper (also called a vibration reduction mechanism or torsional vibration reduction device) is interposed between the clutch and the output shaft to absorb and dampen the torsional vibration (hereafter, torsional vibration may be simply referred to as vibration). be.).

For example, as shown in Patent Document 1, the damper includes an input rotating member connected to the front cover via a clutch during lockup, and an output rotating member connected to the turbine hub for transmitting power to the output shaft. , an intermediate rotary member interposed between the input rotary member and the output rotary member (the disk member in the example of Document 1), and an elastic member interposed between the input rotary member and the intermediate rotary member (the example of Document 1). an energy accumulator in this case) and an elastic member (an energy accumulator in the example of Document 1) interposed between the intermediate rotary member and the output rotary member, connecting the input rotary member and the intermediate rotary member so as to be relatively rotatable, Also, the input rotary member, the intermediate rotary member, and the output rotary member are connected so as to be relatively rotatable).

Such a damper suppresses vibrations caused by torque fluctuations during lockup by relatively rotating within the elastic range of an elastic member interposed between the input rotary member and the intermediate rotary member, and by suppressing the vibration between the intermediate rotary member and the output rotary member. It is reduced by relatively rotating within the elastic range of the elastic member interposed between.

The characteristics that reduce vibration (damper characteristics) depend on the resonance frequency of the elastic member and the like, and thus can change with changes in the engine speed. Therefore, the damper is provided with a vibration absorber (for example, a centrifugal pendulum) so as to adapt to a wide range of engine speeds and reduce vibration, thereby achieving good damper characteristics.

In the damper, the output rotary member connected to the turbine hub for transmitting power to the output shaft is arranged at the most central side of the damper, and the intermediate rotary member and the input rotary member are arranged outside thereof. Also, the plurality of elastic members are arranged apart from each other in the radial direction of the damper for the purpose of downsizing the torque converter. In terms of the positional relationship of the output rotary member, the intermediate rotary member, and the input rotary member in the direction of the rotary shaft of the torque converter, the input rotary member is on the crankshaft side of the engine, and the output rotary member connected to the turbine hub is on the turbine runner side. placed.

Japanese Patent Publication No. 2011-526344

Each rotating member of the damper rotating at high speed and the vibration absorbing element are directly or indirectly centered with respect to the output shaft. This vibration absorber is also displaced (hereinafter referred to as swinging) in the rotational direction within a predetermined range in accordance with the rotational speed in order to reduce vibrations while adapting to a wide range of rotational speeds. However, if the centering of the vibration absorber portion is poor, it will be displaced in the axial direction (tilt or shake due to tilt, hereinafter referred to as tilt) in addition to rocking in the rotational direction. This displacement in the axial direction interferes with the original vibration reducing action, resulting in a drop in vibration absorbing performance. In other words, the vibration absorbing element may affect the vibration absorbing performance depending on the centering method of each rotating member of the damper.

In order to solve the above-mentioned problems, the present invention provides a damper with a desired oscillation characteristic by providing a centering portion between the rotating members of the damper to prevent displacement that hinders the vibration absorption performance of the vibration absorber portion. An object of the present invention is to provide a torque converter equipped with the damper.

In order to solve such a problem, the present invention provides an input rotary member for transmitting torque when locking up, an output rotary member for transmitting torque to a rotary output shaft, and between the input rotary member and the output rotary member. a first elastic member interposed between the input rotary member and the intermediate rotary member; and a second elastic member interposed between the intermediate rotary member and the output rotary member. a vibration absorber attached to the intermediate rotary member; and a centering surface formed on the intermediate rotary member and a centering surface formed on the output rotary member, interposed between the intermediate rotary member and the output rotary member. and a first centering portion on which the centering surface slides.

Further, in the present invention, the range width between both sides of the vibration absorber portion in the axial direction and the range width of the centering surface in the axial direction of the first centering portion are arranged such that at least a portion of the range width overlaps in the axial direction. It is characterized by

Further, in the present invention, the center position of the range width between both sides in the axial direction of the vibration absorber portion is arranged so as to be within the range width of the centering surface in the axial direction of the first centering portion. characterized by

Further, in the present invention, the first centering portion is arranged so that the center position of the range width of the centering surface in the axial direction is within the range width between both sides of the vibration absorber portion in the axial direction. characterized by

Further, according to the present invention, the sliding surface of the first centering portion on which the centering surface on the side of the intermediate rotating member and the centering surface on the side of the output rotating member slide rotates about the center of gravity of the vibration absorber portion. It is characterized by being positioned on a straight line connecting the central axes at the shortest distance.

Further, the present invention further includes an axial positioning portion extending toward the output shaft in a direction substantially orthogonal to the centering portion of the intermediate rotating member on the distal end side of the centering portion of the intermediate rotating member. characterized by

Further, the present invention provides a second rotary member interposed between the input rotary member and the intermediate rotary member, in which a centering surface formed on the input rotary member slides against a centering surface formed on the intermediate rotary member. and a centering portion.

Further, the present invention is characterized in that the vibration absorbing pendulum section includes a pendulum supporting section attached to the intermediate rotating member, and the vibration absorbing pendulum swingably attached to the pendulum supporting section. do.

Further, the present invention provides a torque converter having a damper in a lockup mechanism, wherein the damper includes an input rotary member that is driven by the lockup mechanism to be locked up with a housing of the torque converter, and a torque output shaft of the torque converter. an intermediate rotary member interposed between the input rotary member and the output rotary member; and a first elastic member interposed between the input rotary member and the intermediate rotary member. a second elastic member interposed between the intermediate rotary member and the output rotary member; a vibration absorber attached to the intermediate rotary member; and between the intermediate rotary member and the output rotary member. and a first centering portion interposed between the intermediate rotary member and the centering surface formed on the output rotary member. is.

According to the present invention, even in the case of a damper having a vibration absorber, by providing a centering portion between members of a rotating member of the damper, the vibration absorbing performance of the vibration absorber portion having the vibration absorber is hindered. Displacement can be prevented. Therefore, it is possible to provide a damper having desired oscillation characteristics and a torque converter having the damper.

In addition, according to the present invention, the relationship between the range width of the centering surface of the centering portion between the rotating members and the width of both sides of the vibration absorber portion overlaps in a predetermined range in the direction of the rotation radius. It is possible to reduce the inclination of the element with respect to the axial direction, and it is possible to effectively reduce vibration.

1 is a diagram showing a schematic cross-sectional structure of a torque converter having a damper according to the present invention; FIG. It is a figure which shows the cross-sectional schematic structure of the damper which concerns on this invention. FIG. 3 is a diagram for explaining schematic cross-sectional configurations of an input rotary member, an intermediate rotary member, and an output rotary member of the damper according to the present invention; FIG. 4 is a diagram for explaining a schematic cross-sectional configuration of two centering portions of the damper according to the present invention; FIG. 5 is a diagram for explaining the positional relationship between the centering portion of the damper and the vibration absorber portion in the torque converter according to the present invention; 2 is a diagram for explaining a schematic cross-sectional configuration of a lockup mechanism of the torque converter shown in FIG. 1; FIG.

A damper of a torque converter (also referred to as a torque transmission device) according to the present invention will be described below with reference to the drawings.

<Torque converter>
An embodiment of a damper according to the present invention and a torque converter provided with the damper will be described with reference to FIGS. 1 to 6. FIG.

FIG. 1 shows a schematic cross-sectional structure of a torque converter having a damper according to the present invention, showing an upper half with respect to a rotation axis c. In FIG. 1, the torque converter 1A has a damper inside a substantially disc-shaped housing 10 . The damper has an input rotary member 20 , an intermediate rotary member 21 and an output rotary member 22 . Elastic members (a first elastic member and a second elastic member) are provided between the input rotary member 20 and the intermediate rotary member 21 and between the intermediate rotary member 21 and the output rotary member 22, respectively, to absorb vibration. A child part 25 is provided. The vibration absorbing pendulum section 25 is composed of, for example, a pendulum (inertia mass body) and a pendulum support plate (supporting member), and may be called a centrifugal pendulum type vibration absorbing mechanism. The construction of the damper according to the present invention will be described in detail as a damper 2A shown in FIG. The housing 10 has a front cover 11 that is rotationally driven by an engine (not shown) and a pump impeller 12 that is fixed to the front cover 11 and rotates. ) is filled. A plurality of cover bosses 11a for transmitting torque from the engine are welded to a region near the outer circumference of the front cover 11, for example.

The torque conversion section includes impeller blades 12 a arranged on the pump impeller 12 , a turbine runner 13 having turbine blades 13 a arranged thereon, and a stator 14 . In the torque conversion section, a turbine hub 15 integrated with the turbine runner 13 transmits torque transmitted to the turbine blades 13 a to the output shaft 16 . Thus, the torque conversion section performs torque transmission between the front cover 11 and the output shaft 16 . Further, at the time of lockup, torque transmission between the front cover 11 and the output shaft 16 is performed by a damper 2A (described later in FIG. 2) locked up to the front cover 11. FIG.

<<Structure of damper>>
A damper 2A shown in FIG. It comprises a member 24, a vibration absorbing pendulum portion 25, and the like. A first centering portion 26 is provided between the intermediate rotary member 21 and the output rotary member 22 , and a second centering portion 27 is provided between the input rotary member 20 and the intermediate rotary member 21 . These centering portions will be described later.

The input rotary member 20, the intermediate rotary member 21, and the output rotary member 22 all have a substantially annular shape in plan view. Here input rotary member 20 is closest to front cover 11 , output rotary member 22 is closest to turbine runner 13 and turbine hub 15 , and intermediate rotary member 21 is positioned between input rotary member 20 and output rotary member 22 . ing.

The intermediate rotary member 21 is positioned between the input rotary member 20 and the output rotary member 22 also in the axial direction (the direction of the output shaft 16). The elastic member 23 is interposed between the input rotary member 20 and the intermediate rotary member 21 , and the elastic member 24 is interposed between the intermediate rotary member 21 and the output rotary member 22 . The vibration absorber portion 25 is attached to the intermediate rotating member 21 . The elastic member 23 and the elastic member 24 may each be composed of what is called a torsion spring.

<Structure of Input Rotary Member>
The configuration of the input rotary member 20 shown in FIGS. 1 and 2 will be described with reference to FIG. In FIG. 3, the input rotary member 20 includes an input rotary member body 201 having a substantially planar annular shape, a sliding contact portion side end portion 202 extending from the annular inner peripheral portion of the input rotary member body 201 to the front cover 11 side, An engaging portion 203 between the input rotary member 20 and the elastic member 23 extends from the vicinity of the annular outer peripheral portion of the input rotary member main body 201 to the side opposite to the sliding contact portion side end portion 202 . Further, on the side of the input rotating member 20 previously shown as the centering portion 27 , there is a centering portion 204 located on the inner peripheral side of the engaging portion 203 and extending to the opposite side of the sliding contact portion side end portion 202 . Here, the centering portion 204 of the input rotary member 20 has an outer peripheral surface 204a of the centering portion formed to intersect the plane of rotation of the input rotary member 20 . This outer peripheral surface 204a will be described later with reference to FIG.

<Structure of Intermediate Rotating Member>
The configuration of the intermediate rotating member 21 shown in FIGS. 1 and 2 will be described with reference to FIG. In FIG. 3 , the intermediate rotary member 21 includes an intermediate rotary member main body 211 having a substantially planar annular shape, and a first centering portion 26 extending from the annular inner peripheral portion of the intermediate rotary member main body 211 to the side opposite to the front cover 11 . centering portion 212 on the side of the intermediate rotary member, an axial positioning portion 212F extending toward the output shaft 16 in a direction substantially perpendicular to the centering portion 212 at the tip of the centering portion 212, and a circle of the intermediate rotary member main body 211. An engaging portion 213 between the intermediate rotary member 21 and the elastic member 23 extending from the vicinity of the outer peripheral portion of the ring toward the front cover 11 side, and an engaging portion 213 located on the inner peripheral side of the engaging portion 213 and extending toward the front cover 11 side. The engagement between the elastic member 24 and the intermediate rotating member 21 located on the outer peripheral side of the centering portion 214 on the side of the intermediate rotating member of the centering portion 27 of the centering portion 27 and the centering portion 212 above and extending to the opposite side of the front cover 11. A unit 215 is included.

Here, the centering portion 212 of the intermediate rotating member 21 has an outer peripheral surface 212a of the centering portion formed to intersect the plane of rotation of the intermediate rotating member 21, and the centering portion 214 of the intermediate rotating member 21 has an intermediate surface 212a. It has a centering inner peripheral surface 214 a formed to intersect the plane of rotation of the rotating member 21 . These outer peripheral surface 212a and inner peripheral surface 214a will be described later with reference to FIG.

<Structure of Output Rotating Member>
The configuration of the output rotary member 22 shown in FIGS. 1 and 2 will be described with reference to FIG. In FIG. 3, the output rotary member 22 includes an output rotary member main body 221 having a substantially planar annular shape, an output rotary member 22 extending from the vicinity of the annular outer peripheral portion of the output rotary member main body 221 toward the front cover 11 side, and an elastic member 24. , a centering portion 222 on the output rotary member side of the first centering portion 26 that extends toward the front cover 11 and is located on the inner peripheral side of the engaging portion 223, and the output rotary member main body 221. The hub connecting portion 224 of the output rotary member is formed in a substantially cylindrical shape toward the turbine hub 15 side on the inner circumference of the ring, and the hub connecting portion 224 extends toward the output shaft 16 side on the turbine hub 15 side. Includes output rotary member hub connection flange 224F. Here, the centering portion 222 of the output rotary member 22 has a centering inner peripheral surface 222 a formed to intersect the rotation plane of the output rotary member 22 . The inner peripheral surface 222a will be described later with reference to FIG.

The output rotary member 22 is fastened to the turbine hub 15 and the turbine runner 13 by the fastening member 17 (in this fastening, the output rotary member 22 is centered with respect to the turbine hub 15).

<Structure of first and second elastic members>
The first elastic member 23 is interposed between the input rotating member 20 and the intermediate rotating member 21 that are relatively rotatably coupled by a coupling mechanism (not shown), and biases the input rotating member 20 and the intermediate rotating member 21 . do. The second elastic member 24 is interposed between the intermediate rotary member 21 and the output rotary member 22, which are relatively rotatably coupled by a coupling mechanism (not shown), to attach the intermediate rotary member 21 and the output rotary member 22. force.

In this way, the elastic members 23 and 24 interposed in series between the input rotary member 20 and the output rotary member 22 absorb and attenuate the torsional vibration within the range of expansion and contraction according to their own resonance frequencies. . As the elastic member 23 and the elastic member 24, those that exert a cushioning effect by the elasticity of a torsion spring are typical.

<Configuration of vibration absorber>
As shown in FIGS. 2 and 3, the vibration absorber portion 25 attached to the intermediate rotating member 21 includes a substantially flat plate-like vibration absorber frame (also called a pendulum support portion, a pendulum support plate, etc.) 251 and a vibration absorber frame 251 . It is composed of a plurality of centrifugal force pendulums (also called vibration absorbers, inertial masses, pendulums, etc.) 252 and the like. The vibration absorbing unit frame 251 of the vibration absorbing pendulum unit 25 is fastened (fixed) to the intermediate rotary member 21 with a fastening member 253 .

As shown in FIG. 3, the vibration absorber portion 25 is positioned between the centering portion 214 of the intermediate rotary member 21 and the engaging portion 215 of the elastic member 24, and the vibration absorber frame 251 and the intermediate rotary member body 211 are separated from each other. is defined by the length (height) of the fastening member 253 (the positional relationship between the center of gravity of the vibration absorber portion 25 and the first centering portion 26 is defined by the fastening member 253).

The centrifugal pendulums 252 are capable of swinging on a plane orthogonal to the output shaft 16, and are attached to the vibration absorber frame 251 on the intermediate rotary member main body 211 side and the turbine runner 13 side in the same number, for example. By swinging the centrifugal pendulum 252 in the rotational direction, it is possible to adapt to a wide range of rotational speeds and reduce vibration.

<Structure of the first centering section>
As shown in FIGS. 2, 3, and 4, the first centering portion 26 interposed between the intermediate rotary member 21 and the output rotary member 22 includes a centering portion 212 on the intermediate rotary member 21 side and a centering portion 212 on the side of the intermediate rotary member 21. and side centering portions 222 .

The centering portion 212 (see FIG. 4) on the side of the intermediate rotary member 21 has a peripheral surface that intersects the plane of rotation of the intermediate rotary member 21, the outer peripheral surface of which forms a centering peripheral surface 212a, and the central axis of which intersects with the intermediate rotary member. It coincides with the rotation center axis of the member 21 with desired accuracy. The centering portion 222 (see FIG. 4) of the output rotary member 22 has a peripheral surface that intersects the plane of rotation of the output rotary member 22, the inner peripheral surface of which forms a centering inner peripheral surface 222a, and the central axis of which is It coincides with the rotation center axis of the output rotary member 22 with desired accuracy. That is, the intermediate rotary member 21 and the output rotary member 22 are each centered on the central axis of rotation with a predetermined clearance.

Here, the diameter of the centering outer peripheral surface 212a of the intermediate rotary member 21 is slightly smaller than the diameter of the centering inner peripheral surface 222a on the output rotary member 22 side. 222 (centering inner circumferential surface 222a side) so as to be slidable. Then, the area where the centering outer peripheral surface 212a on the intermediate rotary member 21 side and the centering inner peripheral surface 222a on the output rotary member 22 side slide becomes the sliding surface of the first centering portion 26, and this sliding surface is the output shaft. It has a central axis of rotation in 16 directions.

With such a first centering portion 26, the rotation axis of the intermediate rotary member 21 and the rotation axis of the output rotary member 22 are aligned with desired accuracy. Further, since the output rotary member 22 is centered with respect to the turbine hub 15, the rotary shaft of the intermediate rotary member 21 coincides with the rotary shaft of the output shaft 16 with desired accuracy. As a result, smooth relative rotation between the intermediate rotary member 21 and the output rotary member 22 becomes possible.

Further, since the sliding surface of the first centering portion 26 is formed coaxially with the rotation center axis in the direction of the output shaft 16, displacement of the center of gravity of the vibration absorber portion 25 is suppressed.

Note that the centering outer peripheral surface 212a of the intermediate rotary member 21 and the centering inner peripheral surface 222a of the output rotary member 22 are typically continuous peripheral surfaces. A part may have a notch or the like. This is because the centering outer circumferential surface 212a on the intermediate rotating member 21 side and the centering inner circumferential surface 222a on the output rotating member 22 side should be able to slide smoothly within the relative rotation range between the intermediate rotating member 21 and the output rotating member 22. It is from. That is, in the present invention, the peripheral surface may be a peripheral surface whose entire circumference is continuous, or may have a notch or the like on a part of the entire circumference.

<Positional relationship between the first centering portion and the vibration absorber>
As shown in FIGS. 3 and 4, in the damper 2A (the symbol is shown in FIG. 2), the insertion position of the centering portion 222 on the side of the output rotating member 22 is the axial positioning portion 212F. Regulated. Therefore, by positioning the axial positioning portion 212F of the intermediate rotating member 21 on the turbine runner 13 side, the sliding surface of the first centering portion 26 is aligned with the center of gravity of the vibration absorber portion 25 and the rotation center axis. It can be positioned on the straight line connecting the shortest distance.

As described above, by determining the axial position of the sliding surface of the first centering portion 26 and the center of gravity of the centrifugal force pendulum 252 of the vibration absorber portion 25, the displacement of the center of gravity of the vibration absorber portion 25 is intermediate. The influence on the positional relationship between the rotation center axis of the rotating member 21 and the rotation center axis of the output rotating member 22 can be further reduced.

In addition, regarding the positional relationship in the axial direction of the first centering portion 26 and the axial direction of the vibration absorber portion 25, a desirable mutual arrangement will be described later using FIG.

<Configuration of Second Centering Unit>
The second centering portion 27 (see FIG. 3) interposed between the intermediate rotary member 21 and the input rotary member 20 has a centering portion 204 on the input rotary member 20 side and a centering portion 214 on the intermediate rotary member 21 side. include.

The centering portion 204 (see FIG. 4) on the side of the input rotary member 20 has a peripheral surface that intersects with the plane of rotation of the input rotary member 20. It coincides with the rotation center axis of the rotating member 20 with desired accuracy. The centering portion 214 on the side of the intermediate rotary member 21 has a peripheral surface that intersects with the plane of rotation of the intermediate rotary member 21, the inner peripheral surface of which forms a centering inner peripheral surface 214a, and the central axis of which forms a centering inner peripheral surface 214a. with the desired accuracy.

Here, the diameter of the centering inner peripheral surface 214a on the intermediate rotary member 21 side is slightly larger than the diameter of the centering portion outer peripheral surface 204a on the input rotary member 20 side, and the centering portion 204 on the input rotary member 20 side is positioned on the intermediate rotary member 21 side. It can be slidably inserted into the centering portion 214 (on the centering inner circumferential surface 214a side of the intermediate rotary member 21). Then, the area where the centering inner peripheral surface 214a on the intermediate rotary member 21 side and the centering portion outer peripheral surface 204a on the input rotary member 20 side slide becomes the sliding surface of the second centering portion 27, and this sliding surface serves as the output surface. It has a central axis of rotation in the direction of the axis 16 .

Due to the second centering portion 27, the rotation axis of the intermediate rotation member 21 and the rotation axis of the input rotation member 20 are aligned with desired accuracy. Here, since the rotation axis of the intermediate rotation member 21 coincides with the rotation axis of the output rotation member 22 and the rotation axis of the output shaft 16 with desired accuracy, the rotation axis of the input rotation member 20 is aligned with the rotation axis of the output rotation member 22. The rotation axis and the rotation axis of the output shaft 16 are matched with desired accuracy. Of course, smooth relative rotation between the intermediate rotary member 21 and the input rotary member 20 is possible.

The sliding surface of the second centering portion 27 is formed coaxially with the rotation center axis in the direction of the output shaft 16, and the position between the rotation center axis of the intermediate rotary member 21 and the rotation center axis of the input rotary member 20 is determined. The relationship is formed independently of the first centering portion 26 .

The outer peripheral surface 204a of the centering portion on the side of the input rotary member 20 and the inner peripheral surface 214a of the centering portion on the side of the intermediate rotary member 21 typically form a continuous peripheral surface. A part of the circumference may have a notch or the like. This is because, within the range of relative rotation between the input rotary member 20 and the intermediate rotary member 21, if the centering outer peripheral surface 204a on the input rotary member 20 side and the centering inner peripheral surface 214a on the intermediate rotary member 21 side can slide smoothly. because it is good.

<Positional Relationship between First Centering Part and Vibration Absorber Part in Each Axial Direction>
A desirable positional relationship between the centering portion and the vibration absorber portion of the damper according to the present invention will be described with reference to FIG. FIG. 5 shows the equivalent of the torque converter shown in FIG. 1, and like reference numerals indicate like objects.

In FIG. 5, the first centering portion 26 is interposed between the intermediate rotary member 21 and the output rotary member 22 as described above, and the centering portion 212 on the intermediate rotary member 21 side and the output rotary member 22 and side centering portions 222 . Here, the rotation axis of the intermediate rotary member 21 and the rotation axis of the output rotary member 22 are matched with desired accuracy by the first centering portion 26 . Further, the vibration absorbing pendulum section 25 includes the vibration absorbing section frame 251 and the centrifugal pendulum 252 as described above.

The centrifugal force pendulum 252 of the vibration absorbing pendulum portion 25 acts as an inertial force against the rotational force and swings in the rotational direction, but it may also tilt left and right in the figure. Therefore, depending on the mounting position, the inclination of the centrifugal force pendulum 252 from the center position or deviation from the first centering portion 26 may hinder vibration reduction. A more desirable positional relationship between the centering portion and the vibration absorber portion will be described below.

In FIG. 5, the axial range of the mutual contact surfaces (mounting surfaces) of the centering portion 212 on the intermediate rotary member 21 side and the centering portion 222 on the output rotary member 22 side is denoted by B, and the center position is denoted by b. . Further, the axial range of the entire vibration absorbing pendulum portion 25 is the range indicated by A including the width of both sides of the centrifugal force pendulum 252, and the center position thereof is indicated by a.

Based on this configuration, the present invention is arranged such that the axial range A of the vibration absorber portion 25 and the axial range B of the first centering portion 26 at least partially overlap in the axial direction. I have done it. Alternatively, the center a of the axial range A of the vibration absorber portion 25 may be positioned within the axial range B of the first centering portion 26 . Alternatively, the center b of the axial range B of the first centering portion 26 may be positioned within the axial range A of the vibration absorber portion 25 .

That is, the axial range of the vibration absorber portion 25 and the axial range of the first centering portion 26 are at least partially overlapped within a predetermined range. It is possible to eliminate or reduce the tilt in the axial direction with respect to movement. Further, by setting the centering portion 26 between the intermediate rotary member 21 and the output rotary member 22 and the center of the vibration absorber portion 25 within a predetermined range in the rotation axis direction, the vibration absorber portion 25 can absorb vibrations. This suppresses the swinging of the child 252 to the left and right in the figure.

<Lockup mechanism>
As shown in FIG. 6, the lockup mechanism 30 includes a front cover-side sliding contact portion 301 integrated with the front cover 11, a damper-side sliding contact portion 302 integrated with the input rotary member 20, and hydraulic pressure to move the output shaft 16 direction. Also, the lock-up piston 303 displaced toward the front cover 11 to bring the damper-side sliding contact portion 302 and the front-cover-side sliding contact portion 301 into contact with each other, and the lock-up piston 303 is biased away from the front cover 11. A lockup piston biasing spring 304 is included.

When the damper side sliding contact portion 302 contacts the front cover side sliding contact portion 301 by the hydraulically driven lockup piston 303, the torque converter 1A locks up. When the hydraulic drive of the lockup piston 303 is released, the lockup piston 303 is biased by the lockup piston biasing spring 304, and the damper-side sliding contact portion 302 and the front cover-side sliding contact portion 301 come into contact. is released (the lockup of the torque converter 1A is released).

<First centering portion during lockup>
When the lockup mechanism 30 is not locked up, the turbine runner 13, turbine hub 15, output shaft 16, and damper 2A are rotated by the torque transmitted through the torque conversion section, and the output rotary member 22 is rotated by the output shaft. It rotates at the same rotational speed as 16.

Further, when the lockup mechanism 30 operates to enter the lockup state, the rotational drive of the engine is directly connected to the turbine hub 15 side, which causes torsional vibration. The damper 2A dampens this torsional vibration by connecting an input rotary member 20 connected to the crankshaft side of the engine, an output rotary member 22 connected to the turbine side, and connecting these input rotary member 20 and output rotary member 22. With the intermediate rotating member 21, the relative rotation is elastically coupled to reduce the vibration.

In response to this torsional vibration, the intermediate rotary member 21 and the output rotary member 22 rotate relative to each other (relatively rotate in opposite directions). Since they form a peripheral surface having an axis, the output rotary member 22 and the intermediate rotary member 21 rotate smoothly relative to each other while maintaining their rotary axes aligned with desired accuracy. Further, since the output rotary member 22 is centered with respect to the turbine hub 15, the rotary shaft of the intermediate rotary member 21 is maintained in alignment with the rotary shaft of the output shaft 16 with desired accuracy.

Moreover, the sliding surface of the first centering portion 26 is positioned on the straight line that connects the center of gravity of the vibration absorbing pendulum portion 25 having the plurality of centrifugal force pendulums 252 and the central axis of rotation at the shortest distance (centrifugal Since the plane of rotation drawn by the center of gravity of the force pendulum 252 intersects and is perpendicular to the sliding surface of the first centering section 26 ), the displacement of the center of gravity of the centrifugal force pendulum 252 is the intermediate The rotation axis of the centering portion 212 on the rotating member 21 side is not likely to be tilted (the rotation axes of the output rotation member 22, the intermediate rotation member 21, and the output shaft 16 are aligned with the desired accuracy). can be kept as is).

That is, by arranging the center of gravity of the vibration absorbing element 25 in the range of the sliding surface of the first centering part 26, the centrifugal pendulum 252 axis of the vibration absorbing element 25 generated according to the change in the rotational speed The inclination in the direction can be suppressed, and the swing in the rotational direction can greatly contribute to the reduction of torsional vibration.

Further, since the axial positioning portion 212F of the intermediate rotating member 21 regulates the position of the intermediate rotating member 21 in the direction of the output shaft 16, the position of the center of gravity of the centrifugal force pendulum 252 in the direction of the output shaft 16 is also determined by the axial positioning portion 212F. to be regulated. As a result, the axial inclination of the centrifugal force pendulum 252 of the vibration absorbing pendulum portion 25 caused in accordance with the change in the rotational speed can be suppressed, and furthermore, it is possible to contribute to the reduction of the torsional vibration.

In this way, the first centering portion 26 facilitates positional adjustment between the members, and the vibration damping element 25 effectively reduces vibration. Further, by providing the second centering portion 27 positioned on the outer periphery, it is possible to easily adjust the positions of the respective members.

<Second centering portion during lockup>
The lock-up operation causes the input rotary member 20 and the intermediate rotary member 21 to rotate relative to each other (relatively rotates forward and backward). Since the peripheral surface has an axis, the rotating shafts of the input rotating member 20 and the intermediate rotating member 21 can be kept aligned with desired accuracy, and the input rotating member 20 and the intermediate rotating member 21 can be Maintain smooth relative rotation. Further, since the intermediate rotary member 21 is centered with respect to the turbine hub 15 via the input rotary member 20, the rotary shaft of the input rotary member 20 and the rotary shaft of the output shaft 16 are aligned with the desired accuracy. can be maintained.

That is, the damper of the torque converter according to the present invention is provided with the first centering portion and the second centering portion, thereby facilitating the positional adjustment between the respective members, and the vibration absorber portion generated according to the change in the rotation speed. The effect of reducing vibration due to the swinging motion of the centrifugal pendulum can be made more effective, and vibration damping characteristics against torsional vibration can be improved.

It should be noted that the present invention is not limited to the embodiments, and can be modified appropriately without departing from the scope of the invention.

Each of the embodiments described above is provided for understanding the present invention, and the present invention is not limited to these embodiments but is defined by the claims. In addition, as long as they do not deviate from the technical idea of the present invention, configurations equivalent to those described in the claims are also included in the scope of protection of the present invention.

INDUSTRIAL APPLICABILITY A damper according to the present invention and a torque converter equipped with this damper can be industrially manufactured and used, and can be commercialized.

1A...Torque converter (torque transmission device)
30 Lockup mechanism 20 Input rotary member 204 Centering portion on input rotary member side 204a Centering portion outer peripheral surface on input rotary member side 21 Intermediate rotary member 212, 214 Centering portion on intermediate rotary member side 212a Intermediate rotation Centering outer peripheral surface on member side 212F... Axial positioning portion 214a... Centering inner peripheral surface on intermediate rotary member side 22... Output rotary member 222... Centering portion on output rotary member side 222a... Centering inner peripheral surface on power rotary member side 23, 24 Elastic member 224F Hub connection flange of output rotating member 25 Vibration absorber 251 Vibration absorber frame (pendulum support)
252 ... Centrifugal force pendulum (vibration absorbing pendulum)
26... First centering part 27... Second centering part

Claims (9)

an input rotating member that transmits torque when locking up;
an output rotary member for transmitting torque to the rotary output shaft;
an intermediate rotary member interposed between the input rotary member and the output rotary member;
a first elastic member interposed between the input rotary member and the intermediate rotary member;
a second elastic member interposed between the intermediate rotary member and the output rotary member;
a vibration absorber attached to the intermediate rotating member;
a first centering portion interposed between the intermediate rotary member and the output rotary member, wherein the centering surface formed on the intermediate rotary member and the centering surface formed on the output rotary member slide against each other; ,
A damper , wherein the diameter of the centering surface formed on the intermediate rotary member is smaller than the diameter of the centering surface formed on the output rotary member . The range width between both axial sides of the vibration absorber portion and the range width of the axial centering surface of the first centering portion are arranged such that at least a portion of the range width overlaps in the axial direction. The damper according to claim 1. 3. The center position of the range width between both sides in the axial direction of the vibration absorber portion is arranged so as to be within the range width of the centering surface in the axial direction of the first centering portion. 1. A damper according to claim 1. 3. The first centering portion is arranged so that the central position of the range width of the axial centering surface of the first centering portion is within the range width between both sides of the vibration absorber portion in the axial direction. 1. A damper according to claim 1. The sliding surface of the first centering portion on which the centering surface on the side of the intermediate rotary member and the centering surface on the side of the output rotary member slide is the shortest distance between the center of gravity of the vibration absorber and the center axis of rotation. 2. A damper according to claim 1, positioned on a connecting straight line. 3. An axial positioning portion extending toward the output shaft in a direction substantially perpendicular to the centering portion of the intermediate rotary member, further comprising an axial positioning portion on a tip side of the centering portion of the intermediate rotary member. A damper according to any one of claims 1 to 5. a second centering portion interposed between the input rotary member and the intermediate rotary member, the second centering portion sliding between the centering surface formed on the input rotary member and the centering surface formed on the intermediate rotary member; A damper according to any one of claims 1 to 6, characterized in that it comprises: 3. The vibration absorber includes a pendulum support attached to the intermediate rotating member, and the vibration absorber attached to the pendulum support so as to be swingable. 8. A damper according to any one of items 7 to 7. In a torque converter having a damper in the lockup mechanism,
to the damper,
an input rotating member that is driven by a lockup mechanism and locks up with the housing of the torque converter;
an output rotary member for transmitting torque to the output shaft of the torque converter;
an intermediate rotary member interposed between the input rotary member and the output rotary member;
a first elastic member interposed between the input rotary member and the intermediate rotary member;
a second elastic member interposed between the intermediate rotary member and the output rotary member;
a vibration absorber attached to the intermediate rotating member;
a first centering portion interposed between the intermediate rotary member and the output rotary member, and on which a centering surface formed on the intermediate rotary member slides against a centering surface formed on the output rotary member. ,
A torque converter , wherein the diameter of the centering surface formed on the intermediate rotary member is smaller than the diameter of the centering surface formed on the output rotary member .

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