WO2016129182A1

WO2016129182A1 - Damper disk assembly

Info

Publication number: WO2016129182A1
Application number: PCT/JP2015/085627
Authority: WO
Inventors: 喜隆窪田; 一樹橋本
Original assignee: 株式会社エクセディ
Priority date: 2015-02-09
Filing date: 2015-12-21
Publication date: 2016-08-18
Also published as: CN107429786B; CN107429786A; JP2016145614A; DE112015006130T5

Abstract

The present invention shortens the axial-direction dimension of a pre-damper unit and improves vehicle mountability. This damper disk assembly is provided with a main damper unit and a pre-damper unit (8). The main damper unit has a hub flange (15) and an output hub (16). The pre-damper unit (8) is provided with single first and second sub-plates (31, 32) and with a pre-torsion spring (35). Torque is inputted to the first sub-plate (31) from the main damper unit. The second sub-plate (32) is arranged so as to face the first sub-plate (31) in the axial direction and is connected to the output hub (16). The pre-torsion spring (35) elastically connects the first sub-plate (31) and the second sub-plate (32) in the rotational direction.

Description

Damper disk assembly

The present invention relates to a damper disk assembly, and more particularly to a damper disk assembly for transmitting torque from an engine to an input shaft of a transmission.

A damper disk assembly used in a clutch disk assembly or the like includes a pair of input plates, a hub flange disposed between the pair of input plates in the axial direction, and a pair of input plates and the hub flange. A plurality of torsion springs that are elastically coupled in the direction.

Further, Patent Document 1 discloses a clutch disk assembly provided with a pre-damper unit for attenuating torsional vibration in a small torque range, separately from the main damper unit. The pre-damper unit has a pair of input-side plates to which torque is input from the main damper unit, and an output-side plate disposed so as to be sandwiched between these plates. The pair of input side plates are fixed so as to rotate integrally with each other by rivets. The pair of input side plates and output side plates are elastically connected by a torsion spring.

JP 2003-278791 A

In the clutch disk assembly shown in Patent Document 1, a pre-damper is provided separately from the main damper unit. For this reason, the freedom degree of design regarding arrangement | positioning of a torsion spring increases.

However, a space for the pre-damper unit is required, which is particularly impeded when the axial dimension is shortened. For this reason, there is a problem that the possibility of interference with other members at the time of mounting on the vehicle increases, and the mounting property is reduced.

An object of the present invention is to realize a reduction in the axial dimension of a pre-damper unit in particular, and to improve vehicle mountability.

A damper disk assembly according to one aspect of the present invention is for transmitting torque from an engine to an input shaft of a transmission, and includes a main damper unit and a pre-damper unit. The main damper unit has an input side member to which torque from the engine is input and an output side member connected to the input shaft of the transmission, and attenuates torsional vibration from the engine and is input to the input side member. Torque is transmitted to the output side member. The pre-damper unit receives torque from the main damper unit, attenuates torsional vibration in a range where the torque is smaller than that of the main damper unit, and outputs torque to the output side member. The pre-damper unit includes one input side plate, one output side plate, and an elastic member. Torque is input from the main damper unit to the input side plate. The output side plate is disposed to face the input side plate in the axial direction, and is connected to the output side member. The elastic member elastically connects the input side plate and the output side plate in the rotation direction.

Here, each pre-damper unit is composed of one input side plate, one output side plate, and an elastic member. That is, the conventional pre-damper unit has three plates, but the pre-damper unit of the present invention is constituted by two plates. For this reason, an axial direction dimension can be shortened compared with the conventional apparatus, and the mounting property to a vehicle improves.

In the damper disk assembly according to another aspect of the present invention, the pre-damper unit includes a hysteresis torque generating mechanism that is provided between the input side plate and the output side plate in the axial direction and generates hysteresis torque by relative rotation of both plates. Also have.

In the damper disk assembly according to still another aspect of the present invention, the main damper unit includes a hub unit, a pair of retaining plates, and a support plate. The hub unit receives torque from the engine. The pair of retaining plates are disposed opposite to each other in the axial direction with the hub unit interposed therebetween, and are connected to the hub unit so as not to rotate relative to each other. The support plate is fixed to one of the pair of retaining plates and is connected to the input side plate of the pre-damper unit.

In the damper disk assembly according to still another aspect of the present invention, the hub unit includes a hub flange to which torque from the engine is input, an output hub connected to the input shaft of the transmission, and an intermediate hub. ing. The intermediate hub is arranged between the hub flange and the output hub in a radial direction so that relative rotation of the hub flange and the first angle range or more is prohibited and relative rotation of the output hub and the second angle range or more is prohibited. Has been.

Here, the intermediate hub is arranged so that relative rotation over a predetermined angle range with each of the hub flange and the output hub is prohibited. That is, the stopper mechanism is constituted by the intermediate hub, the hub flange, and the output hub.

In such a configuration, there is no need to provide a stopper mechanism including a stop pin on the outer periphery of the flange as in the conventional device. Therefore, a wide space for the elastic member can be secured, and high torque and wide angle can be easily realized.

As described above, according to the present invention, since the input plate and the output plate of the pre-damper unit are each provided in one piece, the axial dimension can be shortened, and the vehicle mountability can be improved.

1 is a cross-sectional view of a clutch disk assembly according to an embodiment of the present invention. The front view of a clutch disk assembly. The figure which expands and shows the stopper mechanism of FIG. The figure which expands and shows the hysteresis torque generation mechanism of FIG. The figure which expands and shows a pre-damper unit.

FIG. 1 shows a clutch disk assembly 1 as an embodiment of the present invention. The clutch disk assembly 1 is a device for transmitting and interrupting torque from an engine (not shown) arranged on the left side of FIG. 1 to a transmission (not shown) arranged on the right side of FIG. . In FIG. 1, OO is the rotational axis of the clutch disk assembly 1.

[overall structure]
The clutch disk assembly 1 includes a clutch disk 2, a hub unit 3, first and

second retaining plates

4 and 5, a plurality of torsion springs 6, a first hysteresis torque generating mechanism 7, and a pre-damper unit. 8 and. The hub unit 3, the first and

second retaining plates

4, 5, the plurality of torsion springs 6, and the first hysteresis torque generating mechanism 7 constitute a main damper unit.

[Clutch disk 2]
The clutch disk 2 has a plurality of cushioning plates 10 arranged side by side in the circumferential direction, and an annular friction facing 12 fixed by rivets 11 on both surfaces of the cushioning plate 10. The inner peripheral part of the cushioning plate 10 is fixed to the outer peripheral part of the hub unit 3 by rivets 13. Note that an engine-side flywheel (not shown) is disposed on the left side of the friction facing 12 in FIG. Is entered.

[Hub unit 3]
As shown in FIGS. 1 and 2, the hub unit 3 includes a hub flange 15, an output hub 16, and an intermediate hub 17.

The hub flange 15 is a disk-shaped plate, and has four first openings 15a and two second openings 15b arranged in the circumferential direction. The first opening 15a is larger in the radial direction and the rotation direction than the second opening 15b, and the two second openings 15b are arranged to face each other. Further, as shown in FIG. 3 which is a partially enlarged view of FIG. 2, a plurality of notches 15c opened toward the inner periphery side at predetermined intervals in the circumferential direction are formed in the inner peripheral portion of the hub flange 15. Is formed.

The output hub 16 is arranged on the innermost side in the hub unit 3. The output hub 16 is a cylindrical member, and as shown in FIG. 1, a spline hole 16a is formed in the inner peripheral portion. The input shaft of the transmission can be spline engaged with the spline hole 16a. Further, as shown in FIG. 3, a plurality of teeth 16 b are formed on the outer peripheral surface of the output hub 16.

The intermediate hub 17 is disposed between the hub flange 15 and the output hub 16 in the radial direction. The intermediate hub 17 is formed in an annular shape, and as shown in FIG. 3, a plurality of teeth 17a are formed on the outer peripheral surface, and a plurality of notches 17b that open toward the inner peripheral side are formed on the inner peripheral portion. ing.

The plurality of teeth 17 a of the intermediate hub 17 are inserted into the notches 15 c of the hub flange 15. The width in the rotation direction of the teeth 17a of the intermediate hub 17 is smaller than the width in the rotation direction of the notch 15c of the hub flange 15. Therefore, an outer peripheral gap is formed between the teeth 17a and both end faces in the rotational direction of the notch 15c.

Further, the teeth 16b of the output hub 16 are inserted into the notches 17b of the intermediate hub 17. The width of the teeth 16b of the output hub 16 in the rotational direction is smaller than the width of the notches 17b of the intermediate hub 17 in the rotational direction. Therefore, an inner peripheral side gap is formed between the teeth 16b and both end surfaces of the notch 17b in the rotation direction.

Further, the intermediate hub 17 has a plurality of holes 17c through which rivets described later pass.

With the configuration as described above, the output hub 16 and the intermediate hub 17 are prohibited from rotating relative to each other over a first angle range corresponding to the inner circumferential side gap. Further, the hub flange 15 and the intermediate hub 17 are prohibited from relative rotation over a second angle range corresponding to the outer peripheral side gap.

[Retaining plates 4, 5]
The first and

second retaining plates

4, 5 are formed in a disc shape and are arranged to face each other with the hub unit 3 interposed therebetween. These retaining

plates

4 and 5 are fixed by a rivet 20 so that they cannot rotate relative to each other. As described above, the rivet 20 passes through the through hole 17 c of the intermediate hub 17.

As shown in FIGS. 1 and 2,

storage portions

4a and 5a for storing the torsion springs 6 are formed on the

respective retaining plates

4 and 5 at portions facing each other. Each

storage portion

4a, 5a has openings 4b, 5b (see FIG. 2: only the second retaining plate 5 is shown in FIG. 2) at both ends in the rotational direction, and the central portion in the rotational direction is from the outer peripheral side. Communication portions 4c and 5c (see FIG. 2: only the second retaining plate 5 is shown in FIG. 2) are formed to communicate with the inner peripheral side. Engaging

portions

4d and 5d that engage with both ends in the rotational direction of the torsion spring 6 are formed at both ends in the rotational direction of the

storage portions

4a and 5a.

[Torsion spring 6]
The torsion spring 6 is disposed in the first opening 15a and the second opening 15b of the hub flange 15, and is stored in the

storage portions

4a and 5a of the first and

second retaining plates

4 and 5 as described above. The torsion spring 6 disposed in the first opening 15a includes a large coil spring 6a having a large coil diameter and a small coil spring 6b inserted in the inner peripheral portion of the large coil spring 6a. Further, the torsion spring 6c disposed in the second opening 15b is a coil spring having higher rigidity than the large coil spring 6a and the small coil spring 6b.

[First hysteresis torque generating mechanism 7]
As shown in FIG. 4 which is a partially enlarged view of FIG. 1, the first hysteresis torque generating mechanism 7 includes an inner peripheral portion of the hub flange 15, the first retaining plate 4 and the second retaining plate 5. Arranged between each. The first hysteresis torque generating mechanism 7 includes a cone spring 23, a friction plate 24, two friction washers 25, and a spacer 26.

The cone spring 23, the friction plate 24, and the friction washer 25 are disposed between the first retaining plate 4 and the inner peripheral portion of the hub flange 15 in this order. The spacer 26 and the friction washer 25 are disposed between the second retaining plate 5 and the inner peripheral portion of the hub flange 15 in this order. An engagement portion 24 a that is bent toward the engine side is formed on the outer peripheral portion of the friction plate 24. The engaging portion 24a engages with the engagement hole 4e of the first retaining plate 4, and thereby the relative rotation between the friction plate 24 and the first retaining plate 4 is prohibited.

[Pre-damper unit 8]
As shown in FIGS. 1 and 5, the pre-damper unit 8 is disposed on the inner peripheral portion of the second retaining plate 5 and on the outer peripheral portion on the transmission side of the output hub 16. Torque is input to the pre-damper unit 8 via the support plate 30. The pre-damper unit 8 includes a first sub plate 31 (input side plate), a second sub plate 32 (output side plate), a bush unit 33, a cone spring 34, and a pre-torsion spring 35. ing. 5 is a partially enlarged view of FIG.

The support plate 30 is a disk-like member, and is fixed to the side surface of the second retaining plate 5 on the transmission side by a rivet 20. The outer peripheral portion 30 a of the support plate 30 is bent toward the transmission side so as to avoid interference with the storage portion 5 a of the second retaining plate 5. A plurality of engagement openings 30b are formed in the outer peripheral portion (bending portion) 30a.

The first sub plate 31 is disposed on the engine side, and the second sub plate 32 is disposed on the transmission side. The first and second sub-plates 31 and 32 are both formed in a disc shape and are rotatable relative to each other. The first sub-plate 31 has a plurality of engaging claws 31 a on the outer peripheral portion, and the plurality of engaging claws 31 a are engaged with the openings 30 b of the bent portions 30 a of the support plate 30. The second sub-plate 32 has a spline hole 32 a that engages with a spline shaft 16 c formed on the outer peripheral surface of the output hub 16 on the inner peripheral portion. Further, the first and second sub-plates 31 and 32 have storage portions 31b and 32b for storing the pre-torsion spring 35 in portions facing each other. Both ends of the storage portions 31b and 32b in the rotational direction are engaged with both ends of the pre-torsion spring 35 in the rotational direction.

The bush unit 33 and the cone spring 34 are disposed between the axial directions of the first and second sub-plates 31 and 32. The bush unit 33 includes a bush main body 33a and a resin friction washer 33b joined to a side surface of the bush main body 33a. A spline hole that engages with a spline shaft 16 c formed on the outer peripheral surface of the output hub 16 is formed in the inner peripheral portion of the bush body 33 a. The bush unit 33 and the cone spring 34 constitute a second hysteresis torque generating mechanism.

A snap ring 36 is provided on the transmission side in the inner peripheral portion of the second sub-plate 32. The snap ring 36 prevents the pre-damper unit 8 from coming out to the transmission side.

[Operation]
When the friction facing 12 is pressed against the engine-side flywheel, the engine-side torque is input to the hub unit 3. This torque is output to the transmission-side shaft through the path of the hub flange 15 → the torsion spring 6 → the first and

second retaining plates

4 and 5 → the pre-damper unit 8 → the output hub 16. Further, the torque transmitted to the first and

second retaining plates

4 and 5 is output to the transmission-side shaft through the route of the intermediate hub 17 → the output hub 16 separately from the above route.

Specifically, when a torsional vibration with a small displacement angle is transmitted from the engine side to the clutch disc assembly 1 during idling or the like, the torsional spring 6 and the first hysteresis torque generating mechanism 7 absorb this torsional vibration. Instead, it is transmitted to the pre-damper unit 8. In the pre-damper unit 8, the pre-torsion spring 35 expands and contracts, and relative rotation occurs between the first sub plate and the second sub plate. Then, a hysteresis torque is generated by the second hysteresis torque generating mechanism constituted by the bush unit 33 and the cone spring 34, and torsional vibration having a small displacement angle is attenuated.

Further, when a torsional vibration having a large displacement angle is transmitted to the clutch disc assembly 1, the relative rotation angle between the output hub 16 and the intermediate hub 17 increases, so that the teeth 16b of the output hub 16 are in the middle. It abuts against the end face of the notch 17b of the hub 17, and relative rotation of both is prohibited.

When the relative rotation of the output hub 16 and the intermediate hub 17 is prohibited, the output hub 16 and the intermediate hub 17 rotate integrally, and relative rotation occurs between these and the hub flange 15. In this case, when the large and

small coil springs

6a and 6b disposed in the first opening 15a expand and contract and a larger torque is transmitted, the torsion spring 6c in the second opening 15b expands and contracts. The first hysteresis torque generating mechanism 7 generates a large hysteresis torque as compared with the hysteresis torque generated by the second hysteresis torque generating mechanism. For this reason, the torsional vibration having a large displacement angle is effectively damped by the characteristics of high rigidity and large friction.

When the relative twist angle between the intermediate hub 17 and the hub flange 15 is further increased, the teeth 17a of the intermediate hub 17 come into contact with the end face of the notch 15c of the hub flange 15, and relative rotation between the two is prohibited.

[Characteristic]
In the above embodiment, the pre-damper unit 8 is constituted by the first and second sub-plates 31 and 32 and the pre-torsion spring 35, respectively. For this reason, an axial direction dimension can be shortened compared with the conventional pre-damper unit.

Further, the stopper mechanism is realized by bringing the output hub 16, the intermediate hub 17, and the hub flange 15 into contact with each other. For this reason, it is not necessary to provide a stopper mechanism including a stop pin on the outer periphery of the flange as in the conventional device. Therefore, a wide space for the torsion spring can be secured, and high torque and wide angle can be easily realized.

[Other Embodiments]
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

In the present invention, since the input plate and the output plate of the pre-damper unit are each one, the axial dimension can be shortened, and the vehicle mountability can be improved.

DESCRIPTION OF SYMBOLS 1 Clutch disc assembly 2 Clutch disc 3

Hub units

4 and 5

Retaining plates

6 and 35 Torsion spring 8 Pre-damper unit 15 Hub flange 16 Output hub 17 Intermediate hub 31 1st subplate (input side plate)
32 Second sub plate (output side plate)

Claims

A damper disk assembly for transmitting torque from the engine to the input shaft of the transmission,
Torque input to the input member by attenuating torsional vibration from the engine, having an input member to which torque from the engine is input and an output member connected to the input shaft of the transmission A main damper unit for transmitting to the output side member;
Torque is input from the main damper unit, a pre-damper unit that attenuates torsional vibration in a range where the torque is smaller than that of the main damper unit and outputs torque to the output side member;
With
The pre-damper unit is
One input side plate to which torque is input from the main damper unit;
One output side plate that is disposed to face the input side plate in the axial direction and is connected to the output side member;
An elastic member that elastically connects the input side plate and the output side plate in a rotational direction;
have,
Damper disk assembly.
2. The damper according to claim 1, wherein the pre-damper unit further includes a hysteresis torque generation mechanism that is provided between the input side plate and the output side plate in an axial direction and generates a hysteresis torque by relative rotation of the two plates. Disc assembly.
The main damper unit is
A hub unit that receives torque from the engine;
A pair of retaining plates disposed opposite to each other in the axial direction across the hub unit and connected to the hub unit so as not to rotate relative to the hub unit;
A support plate fixed to one of the pair of retaining plates and connected to an input side plate of the pre-damper unit;
have,
The damper disk assembly according to claim 1 or 2.
The hub unit is
A hub flange that receives torque from the engine,
An output hub coupled to the input shaft of the transmission;
Arranged between the hub flange and the output hub in a radial direction so that relative rotation of the hub flange and the first angle range or more is prohibited and relative rotation of the output hub and the second angle range or more is prohibited. An intermediate hub,
The damper disk assembly according to claim 3, comprising: