JP2527996Y2 - Liquid viscous damper disk assembly - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper disk assembly, and more particularly to a liquid viscous damper disk assembly that absorbs torsional vibrations by using the viscosity of a liquid.

[0002]

2. Description of the Related Art For example, in a power transmission system constituted by an engine and a transmission of an automobile,
A damper disk is used to absorb torsional vibration between the power input side and the power output side. Further, as this damper disk, a liquid viscous damper disk that absorbs torsional vibration by viscous force of liquid has been put to practical use.

[0003] The liquid viscous damper disk includes, for example, a first flywheel having an accommodating space and connected to the engine side, a second flywheel concentrically connected to the first flywheel and connected to the clutch side, and both flywheels. And a viscous damper mechanism provided in the storage space and having a liquid chamber for storing a liquid, the bearing being disposed between the respective bosses and rotatably supporting the second flywheel with respect to the first flywheel. Is done.

The torsional vibration generated during power transmission is transmitted from the first flywheel to the viscous damper mechanism. The torsional vibration is absorbed by the operation of the viscous damper mechanism, and the power on the engine side is transmitted to the clutch side.

[0005]

In such a liquid viscous damper disk, the liquid in the liquid chamber of the viscous damper mechanism has a centrifugal force because the entire damper disk rotates while power is transmitted from the engine. The first flywheel moves to the outer peripheral side by the action. Then, when torsional vibration occurs, high pressure acts on the liquid in the liquid chamber of the viscous damper mechanism, so that a part of the liquid is carried to the boss portion of the first flywheel against the centrifugal force, and In some cases, the flywheel adheres and accumulates on the inner peripheral side of the end face of the boss portion.

On the other hand, the sealing performance of the bearing portion may be deteriorated due to long-time operation, and as a result, there is a problem that the liquid collected on the inner peripheral side of the end face of the boss portion leaks to the clutch side through the bearing portion. Occurs. Oil leakage to the clutch side
Induces clutch slippage. SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid viscous damper disk assembly that can prevent liquid leakage to the clutch side.

[0007]

A liquid viscous damper disk assembly according to the present invention includes first and second flywheels, a bearing, a viscous damper mechanism, an inclined portion, and a ring plate. . The first flywheel includes:
It has a first boss formed at the center and a receiving space formed radially outward of the first boss. The second flywheel is disposed concentrically with the first flywheel, and has a second boss portion at a central portion capable of accommodating the first boss portion therein. The bearing is disposed between the first and second bosses, and rotatably supports the second flywheel with respect to the first flywheel. The viscous damper mechanism is provided in a storage space of the first flywheel, and is a mechanism for attenuating a torsional torque between both flywheels by viscous force of a liquid. The inclined portion is formed on the inner peripheral side of the end surface of the second boss portion of the second flywheel, and the liquid from the viscous damper mechanism that has entered between the boss portions can be returned to the viscous damper mechanism side by the action of centrifugal force. So inclined. The ring
The rate is determined between the first flywheel and the second flywheel.
It is located between the end face of the second boss part of the eel and the inner peripheral part is
The outer peripheral portion is in contact with the first flywheel,
Abuts the wheel and has multiple notches
Have been.

[0008]

In the present invention, the power on the engine side is transmitted from one flywheel to the other flywheel via the viscous damper mechanism and transmitted to the clutch side. When torsional vibration occurs during power transmission, the viscous damper mechanism attenuates the torsional vibration by viscous force of the liquid.

During the operation of the viscous damper mechanism, a part of the liquid of the viscous damper mechanism tends to move toward the first boss at the center of the first flywheel. But ling
Most of the liquid by the rate does not move on the inner peripheral side. ring
The slight liquid that passed through the notch on the outer edge of the plate
It adheres to the inner peripheral side of the end face of the second boss at the center of the second flywheel. Since an inclined portion is formed on the inner peripheral side of the end surface of the second boss portion of the second flywheel, oil on the inner peripheral side of the end surface of the second boss portion is radially outward along the inclined portion by the action of centrifugal force. Go to The liquid accumulates on the inner peripheral side of the ring plate , but eventually returns to the viscous damper mechanism through a plurality of notches formed on the outer peripheral edge .

[0010]

1 shows a liquid viscous damper disk assembly according to one embodiment of the present invention. The damper disk assembly includes an input-side first flywheel 1, an output-side second flywheel 6 rotatably supported by the input-side first flywheel 1 via a bearing 5, and a first flywheel 1. And a second viscous damper mechanism (hereinafter simply referred to as a damper mechanism) 60 disposed between the first flywheel 6 and the second flywheel 6. The first flywheel 1 is fixed to the crankshaft of the engine, and the second flywheel 6 is provided with a clutch 7.

The first flywheel 1 is a substantially disc-shaped member, and is formed at the center thereof and is formed continuously with a boss 1a fixed to a crankshaft (not shown) of the engine by bolts 18 with bolts 18. Side plate 1b extending radially outward
And a flywheel portion 1c formed continuously on the outer peripheral side of the side plate portion 1b. The boss 1a is the second
The second flywheel 6 protrudes toward the flywheel 6, and the second flywheel 6 is rotatably supported on the outer periphery of the protrusion via a bearing 5. The bearing 5 is fixed by a plate 19 mounted on the end face of the boss 1a with a screw 22. The stopper plate 2 is arranged at a predetermined interval facing the side plate portion 1b. The stopper plate 2 is detachably attached to the side plate portion 1b by a bolt 3. The damper mechanism 60 is inserted between the side plate 1b and the stopper plate 2. The damper mechanism 60 is unitized by pins and the like, and can be easily attached to and detached from the side plate portion 1b by removing the bolt 3.

The second flywheel 6 is a substantially disk-shaped member, and has a boss portion 6a disposed at the center, a pressure contact portion 6b formed continuously therefrom and extending in the radial direction, and an outer periphery of the pressure contact portion 6b. And a clutch mounting portion 6c formed continuously on the side. The boss 6a protrudes toward the first flywheel 1, and the inner periphery of the protruding portion is supported by the bearing 5. Further, corrugated external teeth 14 to which the damper mechanism 60 is connected are formed on the outer peripheral portion, as shown in FIG. The clutch-side end surface of the press-contact portion 6b is a friction surface 6d on which the friction member of the clutch disk 11 constituting the clutch 7 presses.

A clutch cover assembly 8 constituting the clutch 7 is mounted on an end face of the clutch mounting portion 6c. The clutch cover assembly 8 includes a cover 8a, a pressure plate 9, a diaphragm spring 10, and the like. Further, a clutch disk 11 is disposed in the clutch cover 8. Next, the damper mechanism 60 will be described.

The damper mechanism 60 has an output driven plate 12 composed of a pair of plate members. As shown in FIG. 2, corrugated internal teeth 13 meshing with corrugated external teeth 14 formed on the outer periphery of the boss 6 a of the second flywheel 6 are formed on the inner peripheral portion of the driven plate 12. Thereby, the driven plate 12 and the second flywheel 6 can rotate integrally.

As shown in FIG. 4, a plurality of window holes 15 are formed in the driven plate 12 at predetermined intervals in the rotation direction. Recesses 16 and 17 are formed in the side plate portion 1b and the stopper plate 2 corresponding to the window hole 15, respectively. The window 15 and the recesses 16, 1
7, a torsion torque transmitting coil spring 20 is arranged to be compressible in the rotational direction. The coil spring 20 has spring seats 21 disposed at both ends thereof.
(See FIG. 4), which are in contact with both circumferential end faces of the window hole 15 through the same. However, in the free state of the damper disk, as shown in FIG. 4, only the inner peripheral end of the coil spring 20 is in contact with both circumferential end surfaces of the window hole 15. That is, the coil spring 20 is housed in the window hole 15 in an uneven contact state.

As shown in FIG. 2, a predetermined gap 25 is formed between the end face of the boss 6a of the second flywheel 6 and the boss 1a. This gap 25 is for allowing relative rotation of the first flywheel 1 and the second flywheel 6. In this gap 25, a cone spring-shaped ring plate 26 as shown in FIG.

The ring plate 26 has its inner and outer end surfaces pressed against the boss portions 1a and 6a with small pressing force. With this ring plate 2b, the first
The gap 25 between the second flywheels 1 and 6 is isolated from the gap 27 between the inner and outer peripheries of the boss portions 1a and 6a at the lower part in the radial direction. Also, this ring plate 2
6, a plurality of (four in FIG. 3) notches 26
a is formed. These notches 26a are for returning the hydraulic oil to the damper disk 60 side by the action of centrifugal force when the hydraulic oil leaked from the damper mechanism 60 enters the gap 27. An inclined surface 29 is formed on the inner peripheral side of the end surface of the boss 6a. The inclined surface 29 is for returning the hydraulic oil that has entered the gap 27 to the damper disk 60 side.

As shown in the exploded perspective views of FIGS. 1 and 5, on the radially outer side of the driven plate 12,
An annular liquid chamber housing 30 sandwiched between the b and the stopper plate 2 is disposed. As shown in FIGS. 4 and 5, the liquid chamber housing 30 has a plurality of weirs 30c at predetermined intervals in the circumferential direction.
0c protrudes inward in the circumferential direction. In addition, weir part 30c
Is formed with a pin insertion hole 32. The liquid chamber housing 30 includes a plurality of circumferentially extending housing members 30.
A of these members 30A.
The circular liquid chambers for accommodating the liquid are formed by superimposing c and connecting them with the pins 33. A pair of annular projections 30a is formed at a radially inner end of the liquid chamber housing 30, and the annular projections 30a are fitted into annular grooves 31 formed in the driven plate 12 to seal the liquid chamber. doing. Further, both ends in the axial direction and outer ends in the circumferential direction of the liquid chamber are closed by a wall surface of the liquid chamber housing 30.

In the liquid chamber housing 30, a slider 35 is disposed so as to be slidable in the circumferential direction. The slider 35 is formed in a box shape whose inner side is open, and the outer peripheral wall in the radial direction is formed in an arc shape along the outer peripheral wall 30 b of the housing 30. A pair of legs 37 are formed on the inner sides of both ends in the circumferential direction of the slider 35, and a liquid circulation opening 50 is formed between the legs 37.

In FIG. 4, the leg 37 of the slider 35
Is slidably in contact with the outer peripheral edge of the driven plate 12. At the radially outer end of the driven plate 12, a projection 36 is formed that protrudes radially outward. The slider 35 is arranged so as to house the projection 36 therein. Both side walls in the circumferential direction of the slider 35 are stopper portions 35a, and the stopper portions 35a are spaced apart from the protrusions 36 by a predetermined angle in the circumferential direction by, for example, angles θ1 and θ2 when the engine is stopped. The projection 36 divides the liquid chamber in the slider 35 into a first sub-compartment 40 in the rotation direction front and a second sub-compartment 41 in the rotation direction rear, and also has the two sub-compartments 40 and 41 between the slider 35 and the inner surface. Are formed to form a sub-choke S1.

A main choke S2 is formed between the radially inner peripheral edge of the weir portion 30c and the outer peripheral edge of the driven plate 12 to communicate the adjacent first and second large compartments 45 and 46. ing. The interval of the main choke S2 is the sub choke S1
Is smaller than the interval. That is, the flow cross-sectional area of the sub choke S1 is larger than the flow cross-sectional area of the main choke S2.

The driven plate 12 has a liquid supply passage 47 formed in the wall thereof. Liquid supply passage 47
Is the slider 3 at the radially outer edge of the projection 36.
It is open on the 5th side. The liquid supply passage 47 extends radially inward from the opening and branches into two, each of which is open to the window hole 15. Next, the operation of the above embodiment will be described.

When a torsional torque is generated during operation, the first flywheel 1 is twisted forward or backward with respect to the driven plate 12 in the rotational direction. At this time,
In the range of a small torsion angle, the liquid viscous damper disk exhibits a small torsional rigidity because the coil spring 20 is biased and compressed. When the torsion angle increases,
Since the coil spring 20 is fully compressed, the damper disk exhibits a large torsional rigidity.

The generation of hysteresis due to the movement of the liquid when the torsional torque is generated will be described in detail. As shown in FIG. 4, the protrusion 36 is the stopper 3 of the slider 35.
In a state where the first flywheel 1 is not in contact with the driven plate 12, it is assumed that the first flywheel 1 is twisted, for example, in the rotation direction R side. In this case, the housing 30
Similarly, the slider 35 also moves to the rotation direction R side. Thereby, the second small compartment 41 is compressed and reduced, and at the same time, the first small compartment 40 is enlarged and enlarged.
As a result, the liquid mainly flows from the second sub-compartment 41 to the first sub-compartment 40 through the sub-choke S1. Here, since the cross-sectional area of the flow path of the liquid flowing from the second small compartment 41 to the first small compartment 40 is large, the flow passage resistance is small. Therefore, a small hysteresis torque is generated here.

When the torsion angle is increased and the stopper 35a on the rear side in the rotation direction comes into contact with the projection 36, the sub-choke S1 is closed by closing the slider opening 50, and the slider 35 is moved to the closed position. 36 is fixed. Therefore, the first flywheel 1 and the housing 30 move forward in the rotation direction R with respect to the driven plate 12 and the slider 35.
As a result, the liquid in the second Oita chamber 46 flows through the main choke S2 to the first Oita chamber 45, which is located rearward in the rotation direction, and passes through the gap between the outer peripheral side surface of the slider 35 and the housing 30 and the like. Also flows into the first Oita chamber 45 of the above. Here, since the flow path cross-sectional area of the main choke S2 is small, a high fluid resistance is generated, and a large hysteresis torque is generated.

During power transmission, the liquid in the housing 35 normally moves to the outer peripheral side of the damper disk by the action of the centrifugal force, but the operation of the damper disk causes the liquid to move radially inward against the centrifugal force. Skipped, annular projection 30a
May move into the gap 25 below the coil spring 20 through the seal portion (see the arrow in FIG. 2). Gap 2
5 is blocked from the gap 27 by the ring plate 26, most of the liquid in the gap 25 is blocked by the ring plate 26,
Accumulate on the inner peripheral side (the end face side of the boss 1a). Then, the liquid accumulated on the inner peripheral side tries to return to the inside of the housing 35 again by the action of the centrifugal force.

On the other hand, a part of the liquid in the gap 25 penetrates into the gap 27 through the gap between the ring plate 26 and each end face of the bosses 1a and 6a, and accumulates on the inner peripheral side of the boss 6a.
Since the inclined surface 29 is formed on the inner peripheral side of the end face of the boss 6a, the liquid on the inner peripheral side of the boss 6a moves to the outer peripheral side (gap 25 side) along the inclined surface 29 by the action of centrifugal force. I do. Then, it returns into the gap 25 through the notch 26a of the ring plate 26, and further returns to the liquid chamber on the outer peripheral side by the action of the centrifugal force.

In this way, the liquid leaking from the liquid chamber is prevented from moving to the bearing 5 side and leaking from the bearing 5 to the side clutch 8 side. As a result, slippage of the clutch disk 11 due to adhesion of a liquid such as oil is suppressed.

[0029]

In the liquid viscous damper disk assembly according to the present invention, an inclined portion is formed on the inner peripheral side of the end face of the boss portion of the second flywheel rotatably supported with respect to the first flywheel. Since the ring plate is provided on the outer peripheral side of the portion, leakage of liquid from the viscous damper mechanism to the clutch side can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention;
I sectional drawing.

FIG. 2 is an enlarged partial view of FIG. 1;

FIG. 3 is a schematic view of a ring plate.

FIG. 4 is a partial side view of the embodiment.

FIG. 5 is an exploded perspective partial view of a liquid chamber housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st flywheel 5 Bearing 6 2nd flywheel 29 Inclined surface 60 Damper mechanism

Claims (1)

(57) [Scope of request for utility model registration] 1. A first flywheel having a first boss formed in a central portion, and a receiving space formed radially outward of the first boss, and concentric with the first flywheel. A second flywheel having a second boss portion at a center portion which is disposed and capable of accommodating the first boss portion therein; and a second flywheel disposed between the first and second boss portions, A bearing portion rotatably supported with respect to the first flywheel; and a viscous damper provided in an accommodation space of the first flywheel for attenuating a torsional torque between the two flywheels by viscous force of a liquid. And a mechanism formed on the inner peripheral side of the end face of the second boss portion of the second flywheel, and the liquid from the viscous damper mechanism that has entered between the two boss portions is subjected to centrifugal force to act on the viscous damper mechanism. An inclined portion inclined so as to be able to be returned to the side, and a first portion of the first flywheel and the second flywheel.
2 between the end face of the boss and an inner peripheral portion of the first flange.
Abuts the outer periphery of the second flywheel
Ring with multiple notches formed on the outer peripheral edge
A liquid viscous damper disk assembly comprising: a plate ;