JPH0522901U - Flywheel - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a flywheel capable of preventing slipping of a clutch. A flywheel comprises a first flywheel 1, a second flywheel 6, a receiving portion 52 formed in the second flywheel 6, and a plurality of circumferentially extending through holes 53. And a mechanism.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flywheel, and more particularly to a flywheel having a friction surface against which a friction member of a clutch disc on the output side is pressed.

[0002]

[Prior Art]

 For example, a flywheel used for an automobile engine has a center portion fixed to a crankshaft on an engine side, and a clutch mounted on an outer peripheral side. Further, on the side surface on the clutch side, a friction surface with which the friction member of the clutch disc is in pressure contact is formed.

In such a flywheel, a split type flywheel has been proposed. The split-type flywheel has a first flywheel and a second flywheel, and a damper mechanism is housed between them. The first flywheel and the second flywheel are connected to each other by bearings so that they can rotate relative to each other.

[0004]

[Problems to be solved by the device]

 In the split type flywheel, a lubricant (grease) sealed type bearing is used as a bearing for mutually supporting the first flywheel and the second flywheel. However, the sealability of this bearing may deteriorate during long-term operation, and the lubricant may leak to the clutch facing side.

If the damper mechanism provided inside the flywheel is a viscous damper mechanism, a liquid such as grease is filled. When the liquid leaks out in such a viscous damper mechanism, the liquid passes through the bearing and is scattered to the clutch facing side. As described above, if the lubricant or the like leaks to the clutch facing side and adheres to the friction surface of the flywheel, slippage occurs in the clutch, and in extreme cases, the vehicle may be unable to travel. Such a problem is not limited to the split type flywheel, and even in a normal integrated type flywheel, the grease etc. applied to the drive shaft on the transmission side scatters, causing the same problem. Occurs.

An object of the present invention is to provide a flywheel capable of preventing slipping of a clutch.

[0007]

[Means for Solving the Problems]

 The flywheel according to the present invention comprises a flywheel body and a relief mechanism. The flywheel main body has a friction surface that is connected to the input side rotating body and can be brought into pressure contact with the friction member of the output side clutch disk. The relief mechanism is formed radially inward of the friction surface on the clutch disc side of the flywheel main body, receives the oil component moving on the clutch disc side by the action of centrifugal force, and the receiving portion and the flywheel main body. And a plurality of through holes extending in the circumferential direction formed in the flywheel body so as to communicate with the input side rotating body side.

[0008]

[Action]

 In the flywheel according to the present invention, during operation, the receiving portion receives the oil content moving on the clutch disc side of the flywheel body by the action of the centrifugal force. Then, the oil content of the receiving portion is discharged to the input side rotating body side of the flywheel body from a plurality of through holes that connect the receiving portion and the input side rotating body side of the flywheel body.

In this case, each through hole extends in the circumferential direction, which allows the oil content of the receiving portion to be effectively released. In this way, the oil moving on the clutch disc side can be prevented from reaching the clutch disc, which can prevent the clutch from slipping.

[0010]

【Example】

 FIG. 1 shows a flywheel as an embodiment of the present invention. Here, a split-type flywheel equipped with a liquid viscosity damper mechanism is taken as an example. The flywheel 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. The liquid viscous damper mechanism (hereinafter, simply referred to as a damper mechanism) 60 arranged between the second 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 equipped with a clutch 7.

The first flywheel 1 is a generally disk-shaped member, and is connected to a boss portion 1 a arranged at the center and fixed to a crankshaft (not shown) of the engine by a bolt 18 and continuously connected to the boss portion 1 a. The side plate portion 1b is formed and extends outward in the radial direction, and the flywheel portion 1c is formed continuously on the outer peripheral side of the side plate portion 1b. The boss portion 1a projects toward the second flywheel 6 side, and the second flywheel 6 is rotatably supported on the outer periphery of the projection portion via a bearing 5. The bearing 5 is fixed by a plate 19 attached to the end surface of the boss portion 1a with a screw 22. The stopper plates 2 are arranged facing the side plate portion 1b at a predetermined interval. The stopper plate 2 is detachably attached to the side plate portion 1b with bolts 3. The damper mechanism 60 is inserted between the side plate portion 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 generally disc-shaped member, and has a boss portion 6a arranged at the center, a pressure contact portion 6b formed continuously from the boss portion 6a and extending in the radial direction, and an outer circumference of the pressure contact portion 6b. And a clutch mounting portion 6c formed continuously on the side. The boss portion 6 a projects toward the first flywheel 1 side, and the inner circumference of the projecting portion is supported by the bearing 5. As shown in FIG. 2, corrugated external teeth 14 to which the damper mechanism 60 is connected are formed on the outer peripheral portion. The clutch-side end surface of the pressure contact portion 6b is a friction surface 6d with which the friction member of the clutch disc 11 forming the clutch 7 is in pressure contact. The friction surface 6d projects from the end surface on the same side of the boss portion 6a, and as shown in an enlarged view in FIG. 3, a concave receiving portion 52 is formed in a circumferential shape on the inner peripheral surface of the projecting portion. ing. The receiving portion 52 is for receiving oil that moves outward in the radial direction on the clutch disk 11 side end surface of the second flywheel 6 by the action of centrifugal force during operation.

Further, the second flywheel 6 is formed with a through hole 53 for discharging the oil component received by the receiving portion 52 to the first flywheel 1 side. As shown in FIG. 4, a plurality of through holes 53 are formed on the circumference at predetermined intervals, and each through hole 53 is an elongated hole extending in the circumferential direction. Further, each through hole 53 widens toward the first flywheel 1 side. As a result, the oil component that has entered the through holes 53 can be easily discharged from the through holes 53 to the first flywheel 1 side.

A clutch cover assembly 3 forming the clutch 7 is mounted on the end surface of the clutch mounting portion 6c. The clutch cover assembly 8 is composed of a cover 8a, a pressure sharpening rate 9, a diaphragm spring 10 and the like. A clutch disc 11 is arranged in the clutch cover 8. Next, the damper mechanism 60 will be described.

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

As shown in FIG. 2, the driven plate 12 is formed with a plurality of window holes 15 at predetermined intervals in the rotation direction. Further, recesses 16 and 17 are formed in the side plate portion 1b and the stopper plate 2 corresponding to the window hole 15, respectively. In the window hole 15 and the recesses 16 and 17, a torsion torque transmitting coil spring 20 is arranged so as to be compressible in the rotational direction. The coil spring 20 is in contact with both circumferential end surfaces of the window hole 15 via spring seats 21 arranged at both ends thereof (the same applies to the recesses 16 and 17). However, in the damper disk free state, as shown in FIG. 2, only the inner circumferential end of the coil spring 20 is in contact with both circumferential end faces of the window hole 15. That is, the coil spring 20 is accommodated in the window hole 15 in a biased state.

As shown in the exploded perspective views of FIGS. 1 and 5, an annular liquid chamber housing 30 sandwiched between the side plate portion 1 b and the stopper plate 2 is arranged on the radially outer side of the driven plate 12. ing. As shown in FIGS. 2 and 5, the liquid chamber housing 30 has a plurality of weir portions 30c at predetermined intervals in the circumferential direction, and the weir portions 30c project inward in the circumferential direction. Further, a pin insertion hole 32 is formed in the weir portion 30c. The liquid chamber housing 30 is composed of a plurality of housing members 30A extending in the circumferential direction, and the weir portions 30c of these members 30A are superposed on each other and joined by a pin 33 to form an annular liquid chamber for containing a liquid. Is composed of. A pair of annular projections 30a is formed on the radially inner end of the liquid chamber housing 30. The annular projections 30a are fitted into the annular grooves 31 formed in the driven plate 12 to seal the liquid chamber. is doing. Further, both axial ends and outer circumferential end portions of the liquid chamber are closed by the wall surface of the liquid chamber housing 30.

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

In FIG. 2, the leg portion 37 of the slider 35 slidably contacts the outer peripheral edge of the driven plate 12. A protrusion 36 is formed at the radially outer end of the driven plate 12 so as to project radially outward. The slider 35 is arranged so as to accommodate the protrusion 36 inside. 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 protrusion 36 by a predetermined distance in the circumferential direction, for example, at 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 front in the rotation direction and a second sub-compartment 41 in the rear in the rotation direction, and both the sub-compartments 40, 41 between the inner surface and the slider 35. To form a sub-choke S1.

A main choke S2 that connects the first and second large chambers 45 and 46 adjacent to each other is formed between the radially inner peripheral edge of the weir 30c and the outer edge of the driven plate 12. ing. The distance between the main chokes S2 is smaller than the distance between the sub chokes S1. 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.

A liquid supply passage 47 is formed in the wall of the driven plate 12. The liquid replenishment passage 47 is open to the slider 35 side at the radially outer edge of the protrusion 36. The liquid supply passage 47 extends radially inward from the opening, branches into two, and opens in the window hole 15, respectively. Next, the operation of the above embodiment will be described.

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

The generation of hysteresis due to the movement of the liquid when the twisting torque is generated will be described in detail. It is assumed that the first flywheel 1 is twisted in the rotational direction R with respect to the driven plate 12 in a state where the protrusion 36 is not in contact with the stopper portion 35a of the slider 35 as shown in FIG. In this case, the housing 30 and the slider 35 also move in the rotation direction R side. As a result, the second sub-compartment 41 is compressed and becomes smaller, and at the same time, the first sub-compartment 40 is expanded and enlarged. As a result, the liquid flows from the second small compartment 41 to the first small compartment 40 mainly 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 path resistance is small. Therefore, a small hysteresis torque is generated here.

When the torsion angle increases and the stopper portion 35a rearward in the rotational direction comes into contact with the projection 36, the sub-choke S1 is closed by closing the slider opening 50, and the slider 35 projects. It is fixed by 36. 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 large chamber 46 flows through the main choke S2 to the first large chamber 45 rearward in the rotation direction, and also passes through the gap between the outer peripheral side surface of the slider 35 and the housing 30. Also flows to the first large branch chamber 45 in the front in the rotation direction. Here, since the flow path area of the main choke S2 is small, a high fluid resistance is generated and a large hysteresis torque is generated.

During the power transmission, the liquid in the housing 35 is normally moved to the outer peripheral side of the damper mechanism 60 by the action of the centrifugal force. However, the operation of the damper mechanism 60 causes the liquid to move in the radial direction against the centrifugal force. In some cases, the particles may scatter toward the inside and pass through the sealing portion of the annular protrusion 30a and move into the gap 25 (FIG. 3) between the boss portions 1a and 6a below the coil spring 20 (see arrow A in FIG. 3). In such a case, if the sealing property of the bearing 5 deteriorates due to long-term operation, the liquid in the gap 25 leaks through the bearing 5 into the space 51 on the side of the bearing 5, and the action of centrifugal force causes 2 Try to move the flywheel 6 on the clutch disk 11 side outward in the radial direction (see arrow B in FIG. 3). The liquid that has moved to the clutch disk 11 side is received by the receiving portion 52, is discharged to the first flywheel 1 side of the second flywheel 6 through the through hole 53.

In this way, the liquid that moves radially outward on the clutch disc 11 side of the second flywheel 6 is suppressed from reaching the clutch disc 11, which prevents the clutch disc 11 from slipping. To be done. Moreover, each through hole 53 is an elongated hole extending in the circumferential direction, and therefore the oil component moving on the clutch disc 11 side of the second flywheel 6 can be effectively taken into each through hole 53, and the oil component Can be effectively discharged. [Other Embodiments] In the above embodiments, the split type flywheel provided with the liquid viscous damper has been described as an example, but the present invention is not limited to this and is similarly applicable to an integrated flywheel. ..

[0027]

[Effect of the device]

 The flywheel according to the present invention is provided with a relief mechanism including a receiving portion for receiving oil content and a plurality of through holes extending in the circumferential direction, so that oil content can be effectively discharged and clutch slippage can be prevented. it can.

[Brief description of drawings]

1 is a cross-sectional view of an embodiment of the present invention, taken along line I- of FIG.
I sectional view.

FIG. 2 is a partial side view of the embodiment.

FIG. 3 is an enlarged partial view of FIG.

FIG. 4 is a partial side view of FIG.

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

[Explanation of symbols]

 1 First Flywheel 6 Second Flywheel 11 Clutch Disc 52 Receiving Portion 53 Through Hole

Claims (1)

[Scope of utility model registration request] 1. A flywheel main body having a friction surface which is connected to an input side rotating body and on which a friction member of an output side clutch disk can be pressed, and a radius of the friction surface on the clutch disk side of the flywheel main body. A receiving portion that is formed inward in the direction and receives oil that moves on the clutch disc side by the action of centrifugal force, and the flywheel body so that the receiving portion communicates with the input side rotation side of the flywheel body. A flywheel comprising: a relief mechanism formed of a plurality of through holes extending in the circumferential direction.