JP2576598Y2 - Flywheel - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flywheel, and more particularly to a flywheel having a friction surface against which a friction member of an output side clutch disc is pressed.

[0002]

2. Description of the Related Art For example, a flywheel used for an automobile engine has a central portion fixed to a crankshaft on the engine side, and a clutch mounted on an outer peripheral side. Further, a friction surface on which the friction member of the clutch disc is pressed against is formed on the side surface on the clutch side.

In such a flywheel, a split-type flywheel has been proposed. The split 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 as to be relatively rotatable.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned split type flywheel, a bearing sealed with a lubricant (grease) is used as a bearing for mutually supporting the first flywheel and the second flywheel. However, during long-term operation, the sealing performance of the bearing may be reduced, and the lubricant may leak to the clutch facing side.

When 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, it passes through the bearing and scatters to the clutch facing side. As described above, when 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 cannot travel. Such problems are not limited to split flywheels,
Even in a general integrated flywheel, grease or the like applied to the drive shaft on the transmission scatters, causing the same problem.

An object of the present invention is to provide a flywheel which can prevent the clutch from slipping.

[0007]

Means for Solving the Problems] flywheel according to the first invention comprises a flywheel body, and the liquid discharge portion, and a guide structure. The flywheel body has a friction surface that is connected to the input-side rotating body and can be pressed against the friction member of the output-side clutch disc. The liquid
The body discharge portion is formed on the flywheel body so that liquid moving on the clutch disc side of the flywheel body by the action of centrifugal force can be discharged to the input side rotation side of the flywheel body radially inward of the friction surface. It has a plurality of through holes. The guide structure tends to flow between the circumferential directions of the through holes provided on the friction surface side of the flywheel body radially inward of the liquid discharge portion.
This is a structure for guiding liquid to each through hole.

In the flywheel according to the second invention,
The id structure extends in the radial direction formed on the flywheel body.
The groove has a radially inner end that passes through each
The other end is arranged between the holes in the circumferential direction, and the other end extends to each through hole. No.
In the flywheel according to the third invention, the guide structure is
Several buttons for fixing the rye wheel body to other members
Bolt head, and the bolt head is more radial than the through hole.
It is arranged on the inner side between the through holes in the circumferential direction.

[0009]

[Action] In the flywheel according to the first invention, leaked liquid friction of the flywheel body by the action of the centrifugal force
Move the surface side radially outward. The radial inside of the through hole
The flowing liquid flows into the through-hole as it is. Of each through hole
The liquid that is going to flow between the circumferential directions is guided by the guide structure.
It is guided to each through hole of the liquid discharge section. And the led liquid
The body is discharged to the input side rotating body side of the flywheel body through each through hole inside the friction surface against which the clutch disc is pressed.

In this manner, the liquid moving on the clutch disk side of the flywheel body can be prevented from reaching the clutch disk, and the clutch can be prevented from slipping.
In the flywheel according to the second invention, the circumference of each through hole
Liquid you going to flow between the direction flows into the groove, the or
It also flows into each through hole. Flywheel according to the third invention
Liquid that is going to flow between the circumferential directions of each through-hole
It branches at the head of the bolt and flows into the through holes on both sides.

[0011]

1 shows a flywheel according to an embodiment of the present invention. Here, a split flywheel provided with a liquid viscous damper mechanism is taken as an example. The flywheel includes an input-side first flywheel 1, an output-side second flywheel 6 rotatably supported on the input-side first flywheel 1 via a bearing 5, a first flywheel 1, and a second flywheel. Liquid viscous damper mechanism (hereinafter simply referred to as damper mechanism) disposed between the two flywheels 6
60. 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 disk-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 by 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 disc-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. 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 press-contact portion 6b is a friction surface 6d on which the friction member of the clutch disk 11 constituting the clutch 7 presses. The friction surface 6d protrudes from an end surface on the same side of the boss 6a, and as shown in an enlarged view in FIG.
2 are formed in a circumferential shape. The receiving portion 52 is for receiving an oil component that moves radially outward on the clutch disk 11 side end surface of the second flywheel 6 by the action of centrifugal force during operation.

The second flywheel 6 has a through hole 53 for discharging the oil received by the receiving portion 52 to the first flywheel 1. As shown in FIG. 4, a plurality of through holes 53 are formed on the circumference at predetermined intervals, and each of the through holes 53 is a long hole extending in the circumferential direction. In addition, each through-hole 53 expands toward the first flywheel 1. As a result, the oil that has entered the through holes 53 is easily discharged from the through holes 53 to the first flywheel 1 side.

As shown in FIGS. 3 and 4, a plurality of guide grooves 55 extending outward in the radial direction are formed on the end face of the boss 6a. Radial direction of these guide grooves 55
The inward end is located at the radially inner edge 56 of the boss 6a.
And is formed corresponding to the circumferential distance C between the through holes 53.
You. The guide groove 55 gradually moves outward in the radial direction.
The width gradually decreases, and at one end in the circumferential direction of the through hole 53,
It is continuous.

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. 2, 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. 2, 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 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. 2 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.
actuate by superimposing c and joining with pins 33
An annular liquid chamber for storing oil is formed. A pair of annular projections 30a is provided at the radial inner end of the liquid chamber housing 30.
The annular chamber 30a is fitted in an annular groove 31 formed in the driven plate 12 to seal the liquid chamber. 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. 2, the legs 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 in the rotational direction with respect to the driven plate 12. At this time,
In the range of a small torsion angle, the flywheel exhibits a low torsional rigidity because the coil spring 20 is pressed and compressed. When the torsion angle increases, the flywheel exhibits a large torsional stiffness because the coil spring 20 is fully compressed.

A description will be given of the occurrence of hysteresis due to the movement of hydraulic oil when torsional torque is generated. As shown in FIG. 2, the protrusion 36 is the stopper 35a of the slider 35.
When the driven plate 12 is not in contact with
Assume that the first flywheel 1 is twisted in the rotation direction R, for example. In this case, the housing 30 and the slider 35 also move to the rotation direction R side. Thereby, the second small compartment 41 is compressed and its volume becomes small, and at the same time, the first small compartment 40 is enlarged and made large. As a result, the hydraulic oil mainly flows from the second small compartment 41 to the first small compartment 40 through the sub-choke S1. Here, the work flowing from the second sub-compartment 41 to the first sub-compartment 40 is described.
Since the cross-sectional area of the flow path of the dynamic oil is large, the flow path resistance is small.
Therefore, a small hysteresis torque is generated here.

When the torsion angle increases and the stopper 35a on the rear side in the rotation direction comes into contact with the protrusion 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 hydraulic oil in the second Oita chamber 46 becomes the main choke S2
Flows into the first Oita chamber 45 behind in the rotation direction through
It also flows through the gap between the outer peripheral side surface of the slider 35 and the housing 30 to the front first large compartment 45. here,
Since the flow path cross-sectional area of the main choke S2 is small, high viscous resistance is generated, and large hysteresis torque is generated.

[0027] During power transmission, but the liquid in the housing 30 is moved to the normal damper mechanism 60 outer peripheral side by centrifugal force, radial hydraulic fluid against the centrifugal force by the operation of the damper mechanism 60 It may scatter inward and move into the gap 25 (FIG. 3) between the bosses 1a and 6a below the coil spring 20 through the sealing portion of the annular projection 30a (see arrow A in the figure). The hydraulic oil that has moved into the gap 25 usually moves again to the outer periphery of the flywheel due to the action of the centrifugal force. However, if the sealing property of the bearing 5 is reduced due to long-term operation, the liquid in the gap 25 There is a case where the gas leaks into the space 51 on the side of the bearing through the bearing 5.

The hydraulic oil leaking into the space 51 moves radially outward due to the action of the centrifugal force . Radius of through hole 53
The liquid on the inner side flows along the end face of the boss 6a, and
It is stored in the part 52 and flows into the through hole 53. Through hole 5
3 to flow radially outward between circumferential directions C (FIG. 4).
The operating oil moves radially outward along the guide groove 55 (see the arrow in FIG. 4), is stored in the receiving portion 52, and flows into the through hole 53 . The hydraulic oil flowing through the through hole 53 is discharged to the first flywheel 1 side. In this way, the second
Hydraulic oil moving radially outward on the end face of the flywheel 6 on the clutch disc 11 side is effectively discharged to the first flywheel 1 side. This suppresses the hydraulic oil that moves radially outward on the end face of the boss portion 6a of the second flywheel 6 from reaching the clutch disk 11 side, thereby preventing the clutch from slipping. [Other Embodiments] (a) In the above embodiment, the driven plate 12 and the second flywheel 6 have been described as an example in which the driven inner teeth 13 and the corrugated outer teeth 14 are connected to each other. The application of the present invention is not limited to this.

For example, as shown in FIG. 6, a bolt 58 penetrating the boss 6a of the second flywheel 6 and the driven plate 12 is provided, and the boss 6a and the driven plate 12 are connected by the bolt 58. Is also good.
In FIG. 5, the head 58a of the bolt 58 and the boss 6a
A flat washer 59 is inserted between the end face. Further, the bolt 58, as shown in FIG. 7, the circumferential direction of the through holes 53
It is arranged corresponding to the distance C.

In this case, the circumferential distance C between the through holes 53
The hydraulic oil moving radially outward is branched by the head 58a of the bolt 58 as shown by the arrow in FIG. The branched hydraulic oil is guided into each through hole 53 located on both sides of the bolt 58. In this manner, the hydraulic oil that moves the end face of the boss portion 6a of the second flywheel 6 radially outward can be effectively discharged from the through hole 53 to the first flywheel 1 side, and slippage of the clutch can be prevented. (B) In the other embodiment (a), the bolt head 58a
The flat washer 59 is simply inserted between the flat washer 59 and the end face of the boss 6a. Two flat ends of the flat washer 59 are bent at right angles as shown in FIG. May be formed.

When the washer 61 thus deformed is attached to the end face of the boss 6a, the bent portion 61a
Is located radially inward. In this case,
Move the intermediate portion C in the circumferential direction of the through hole 53 outward in the radial direction.
The hydraulic oil branches in two directions at the bent portion 61 a of the washer 61. The branched hydraulic oil is guided into each through hole 53 located on both sides of the bolt 58. In this manner, hydraulic oil moving on the clutch disk 11 side of the second flywheel 6 can be effectively discharged from each through hole 53 in the same manner. (C) In the above embodiment, the divided flywheel having the liquid viscous damper mechanism is taken as an example, but the present invention can be similarly applied to a normal integrated flywheel.

[0032]

In the flywheel according to the present invention, the space between the liquid discharge portion having a plurality of through holes and the circumferential direction of the through holes is provided.
Guide structure for guiding the liquid to flow through each through hole
Since concrete is provided, the liquid to move the clutch disk side
The body can be effectively drained from each through-hole, thereby preventing the liquid from reaching the clutch disc and preventing the clutch from slipping.

[Brief description of the drawings]

1 is a cross-sectional view of one embodiment of the present invention,
I sectional drawing.

FIG. 2 is a partial side view thereof.

FIG. 3 is an enlarged partial view of FIG. 1;

FIG. 4 is a partial side view thereof.

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

FIG. 6 is a view corresponding to FIG. 3 of another embodiment of the present invention.

FIG. 7 is a partial side view thereof.

FIG. 8 is a partial side view of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st flywheel 6 2nd flywheel 53 Through-hole 55 Guide groove 58a Bolt head 61a Folding part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoki Yanagita 1-1-1, Kidamotomiya, Neyagawa City Inside Daikin Manufacturing Co., Ltd. (72) Inventor Mitsuhiko Takenaka 1-1-1, Kidamotomiya, Neyagawa City Co., Ltd. Inside Daikin Works (56) References Japanese Utility Model Showa 61-23543 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A flywheel body connected to an input-side rotating body and having a friction surface against which a friction member of an output-side clutch disk can press against, and the flywheel body moves on the clutch disk side of the flywheel body by the action of centrifugal force. as the liquid can be discharged to the input side rotation body side of the flywheel body in radially inwardly from said friction surface of a liquid discharge portion having a plurality of through holes formed in the flywheel body, the liquid Each of the through holes provided on the friction surface side of the flywheel body radially inward of the discharge portion.
A guide structure for guiding the liquid to flow between the holes in the circumferential direction to each of the through holes. (2) The guide structure is the flywheel body
Are formed in a plurality of radially extending grooves, wherein the grooves are
One end on the radial inside is located between the circumferential directions of the through holes
2. The fan according to claim 1, wherein the other end extends to each of said through holes.
Rye wheel. (3) The guide structure includes the flywheel book
From the heads of several bolts to secure the body to other parts
And the head of the bolt is radially inward from the through hole.
Wherein each of the through holes is disposed in a circumferential direction.
2. The flywheel according to 1.