阅读说明：本技术 带扭矩限制器的阻尼器装置 (Damper device with torque limiter ) 是由 上原宏 于 2021-05-14 设计创作，主要内容包括：一种带扭矩限制器的阻尼器装置,实现装置的径向方向的小型化,且能够在分别装配了扭矩限制器单元和阻尼器单元的基础上组装两者。该阻尼器装置(1)包括阻尼器单元(20)和扭矩限制器单元(10)。阻尼器单元(20)具有止动机构(45),止动机构(45)具有形成于凸缘(40)的止动用孔(42a、42b)、及固定于输入侧板(21)的止动销(24)。扭矩限制器单元(10)具有环状摩擦板(13),环状板(13)的内周部由铆钉(25)固定于输入侧旋转体(21)的外周部,铆钉(25)贯通止动用孔(42a、42b)而组装。(A damper device with a torque limiter, which can be assembled with a torque limiter unit and a damper unit separately while achieving miniaturization of the device in the radial direction. The damper device (1) includes a damper unit (20) and a torque limiter unit (10). The damper unit (20) has a stopper mechanism (45), and the stopper mechanism (45) has stopper holes (42a, 42b) formed in the flange (40) and a stopper pin (24) fixed to the input side plate (21). The torque limiter unit (10) has an annular friction plate (13), the inner peripheral portion of the annular plate (13) is fixed to the outer peripheral portion of the input-side rotating body (21) by rivets (25), and the rivets (25) are assembled by penetrating through the stop holes (42a, 42 b).)

1. A damper device with a torque limiter, which is provided between a member on a power source side and a member on an output side,

the damper device with a torque limiter includes:

a damper unit coupled to the output-side member; and

a torque limiter unit that limits torque transmitted between a member on the power source side and the damper unit,

the damper unit has:

a disc-shaped first rotating body;

a second rotating body which has a flange facing the first rotating body in an axial direction, is rotatable relative to the first rotating body, and is coupled to the output-side member;

a stopper mechanism having a notch formed in the flange and extending in an arc shape, and a stopper pin fixed to the first rotating body and penetrating the notch in an axial direction, the stopper mechanism limiting a relative rotation angle between the first rotating body and the second rotating body within a predetermined angular range; and

an elastic member that elastically couples the first rotating member and the second rotating member in a rotational direction,

the torque limiter unit includes an annular friction plate, an inner peripheral portion of the annular friction plate is fixed to an outer peripheral portion of one of the first rotating body and the second rotating body by a fixing member, and the fixing member is assembled by penetrating the notch of the flange.

2. The damper device with torque limiter according to claim 1,

the first rotating body has a first plate and a second plate in a circular plate shape, the first plate and the second plate are arranged so as to sandwich a flange in an axial direction, and the first plate and the second plate are fixed by the stopper pin so as to be immovable in the axial direction and not to rotate relative to each other.

3. The damper device with torque limiter according to claim 2,

the friction plate is fixed to the first plate,

the second plate has an assembly hole through which the fixing member can pass.

4. The damper device with torque limiter according to any one of claims 1 to 3,

the fixing member and the elastic member are disposed such that a part of each of the fixing member and the elastic member overlaps with the mounting diameter of the stopper pin.

5. The damper device with torque limiter according to any one of claims 1 to 4,

the notch of the stopper mechanism is an arc-shaped long hole, a part of the long hole in the circumferential direction is provided with a protruding part protruding outwards in the radial direction,

the fixing member penetrates the long hole including the protruding portion.

6. The damper device with torque limiter according to any one of claims 1 to 5,

the torque limiter has:

a fixed plate fixed to a member on the power source side;

a pressure plate for pressing the friction plate against the fixing plate; and

and a biasing member that presses the friction plate against the fixed plate via the pressure plate.

Technical Field

The present invention relates to a damper device, and more particularly to a damper device with a torque limiter provided between a power source side member and an output side member.

Background

In a hybrid vehicle including an engine and a motor, for example, a damper device with a torque limiter as shown in patent document 1 is used in order to prevent excessive torque from being transmitted from an output side to the engine side at the time of engine start or the like.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-24364

Disclosure of Invention

Technical problem to be solved by the invention

The damper device with a torque limiter disclosed in patent document 1 includes a damper portion having a pair of plates and a plurality of torsion springs, and the torque limiter is provided on an outer peripheral side of the damper portion. The torque limiter and the damper portion are connected by a rivet. Specifically, the lining plate of the torque limiter and the pair of side plates of the damper portion are all fixed by one type of rivet.

In such a damper device with a torque limiter, since the lining plate of the torque limiter is disposed further outside in the radial direction than the pair of side plates of the damper portion, it is difficult to reduce the size of the device in the radial direction.

In the damper device with a torque limiter, it is preferable to assemble the torque limiter unit and the damper unit separately and then assemble the two units. However, in the damper device of patent document 1, for the same reason as described above, it is not possible to assemble the torque limiter unit and the damper unit separately and then assemble them.

The technical problem of the present invention is to provide a damper device with a torque limiter, which can be assembled with a torque limiter unit and a damper unit being separately mounted, while achieving miniaturization of the device in the radial direction.

Technical solution for solving technical problem

(1) The damper device with a torque limiter according to the present invention is provided between a member on the power source side and a member on the output side. The damper device with the torque limiter includes a damper unit and a torque limiter unit. The damper unit is connected to the output-side member. The torque limiter unit limits torque transmitted between the power source side member and the damper unit. The damper unit has a first rotating body, a second rotating body, a stopper mechanism, and an elastic member. The first rotating body is disc-shaped. The second rotating body has a flange in the axial direction opposite to the first rotating body. The second rotating body is rotatable relative to the first rotating body. The second rotating body is coupled to the output member. The stop mechanism has a notch and a stop pin. The notch is formed on the flange and extends in an arc shape. The stop pin is fixed to the first rotating body. The stop pin runs through the notch along the axial direction. The stopper mechanism limits the relative rotation angle of the first rotating body and the second rotating body within a predetermined angle range. The elastic member elastically couples the first rotating body and the second rotating body in the rotational direction. The torque limiter unit has an annular friction plate. The inner peripheral portion of the annular friction plate is fixed to the outer peripheral portion of either the first rotating body or the second rotating body by a fixing member. The fixing member is assembled by penetrating the notch of the flange.

In this device, a fixing member for fixing the torque limiter unit and the damper unit is inserted through the notch of the stopper mechanism. That is, the torque limiter unit and the damper unit are assembled by a notch through which the stopper pin penetrates, and the inner circumferential portion of the torque limiter and the outer circumferential portion of the damper unit are overlapped. Therefore, the radial direction of the device can be reduced in size as compared with the conventional device. For the same reason, the torque limiter unit and the damper unit can be assembled together after being assembled separately.

(2) Preferably, the first rotating body has a disc-shaped first plate and a disc-shaped second plate, and the first plate and the second plate are arranged so as to sandwich the flange in the axial direction. The first plate and the second plate are fixed to each other by a stopper pin so as not to be movable in the axial direction and not to be relatively rotatable.

(3) Preferably, the friction plate is fixed to the first plate, and the second plate has an assembly hole through which the fixing member can pass.

Here, the fixing member for fixing the friction plate and the first plate is assembled through the assembly hole of the second plate and the notch of the flange.

(4) Preferably, the fixing member and the elastic member are disposed such that a part of each overlaps with the mounting diameter of the stopper pin.

(5) Preferably, the notch of the stopper mechanism is an arc-shaped long hole, a part of the long hole in the circumferential direction has a protruding portion protruding outward in the radial direction, and the fixing member penetrates the long hole including the protruding portion.

(6) Preferably, the torque limiter unit has a fixing plate, a pressure plate, and an urging member. The fixed plate is fixed to a member on the power source side. The pressure plate presses the friction plate against the fixed plate. The urging member presses the friction plate against the fixed plate via the pressure plate.

Effects of the invention

As described above, the damper device with a torque limiter according to the present invention can be reduced in size in the radial direction of the device, and the torque limiter unit and the damper unit can be assembled together after being assembled separately.

Drawings

Fig. 1 is a sectional view of a damper device with a torque limiter according to an embodiment of the present invention.

Fig. 2 is a sectional view at a different position from fig. 1.

Fig. 3 is a front view of the damper unit.

Detailed Description

[ integral constitution ]

Fig. 1 and 2 are sectional views of a damper device 1 with a torque limiter (hereinafter, may be simply referred to as "damper device") according to an embodiment of the present invention. Fig. 3 is a front view of the damper unit 1, which shows a part of the components removed or a part of the components deleted. In fig. 1 and 2, the O-O line is the axis of rotation. In fig. 1 and 2, an engine is disposed on the left side of the damper device 1, and a drive unit including an electric motor, a transmission, and the like is disposed on the right side of the damper device 1.

In the following description, the axial direction is a direction in which the rotation axis O of the damper device 1 extends. The circumferential direction is a circumferential direction of a circle centered on the rotation axis O, and the radial direction is a radial direction of a circle centered on the rotation axis O. The circumferential direction does not need to completely coincide with the circumferential direction of a circle centered on the rotation axis O, and for example, the concept of the circumferential direction also includes the left-right direction based on the window portion and the window hole shown in fig. 3. The radial direction does not necessarily need to completely coincide with the radial direction of the circle centered on the rotation axis O, and for example, the concept of the radial direction also includes the vertical direction based on the window portion and the window hole shown in fig. 3.

The damper device 1 is provided between a flywheel, not shown, and an input shaft of a drive unit, and is a device for damping rotational fluctuations while limiting torque transmitted between an engine and the drive unit. The damper device 1 has a torque limiter unit 10 and a damper unit 20.

[ Torque limiter Unit 10]

The torque limiter unit 10 is disposed on the outer peripheral side of the damper unit 20. The torque limiter unit 10 limits the torque transmitted between the flywheel and the damper unit 20. The torque limiter unit 10 has a first fixing plate 11 (an example of a fixing plate) and a second fixing plate 12, a friction plate 13, a pressure plate 14, and a conical spring 15 (an example of an urging member).

The first fixing plate 11 is fixed to a member on the power source side. The first and second fixing plates 11 and 12 are fixed to each other by a plurality of rivets 16. The friction plate 13 is an annular plate. The pressure plate 14 and the conical spring 15 are disposed between the second fixing plate 12 and the friction plate 13. The conical spring 15 presses the friction plate 13 against the first fixing plate 11 via the pressure plate 14.

[ damper unit 20]

The damper unit 20 is constituted by an input side plate 21 (an example of a first rotating body), a hub flange 22 (an example of a second rotating body), and a damper portion 23 disposed between the input side plate 21 and the hub flange 22.

< input side plate 21>

The input side plate 21 includes a first plate 211 and a second plate 212 (hereinafter, the first plate 211 and the second plate 212 will be collectively referred to as "input side plate 21"). As shown in fig. 3, the first plate 211 and the second plate 212 are each a ring-shaped member having a center hole. Further, although fig. 3 shows only the second plate 212, the first plate 211 is the same as the second plate 212 in basic configuration. The first plate 211 and the second plate 212 are fixed to each other by four stopper pins 24 (see fig. 3) at predetermined intervals in the axial direction. Therefore, the first plate 211 and the second plate 212 cannot relatively move in the axial direction and the rotational direction. As shown in fig. 1, the inner peripheral portion of the friction plate 13 is fixed to the outer peripheral portion of the first plate 211 by four rivets 25 (an example of a fixing member).

As shown in fig. 3, a pair of first and second window portions 21a and 21b are formed in the first and second plates 211 and 212, respectively. The pair of first window portions 21a are disposed opposite to each other across the rotation axis O. Although the first window portion 21a and the second window portion 21b of the second plate 212 are shown in fig. 3, the first window portion 21a and the second window portion 21b of the first plate 211 have the same configuration. The pair of first window portions 21a are formed by cutting and raising the respective plates 211, 212, and have pressing surfaces 21c on both end surfaces in the circumferential direction, and support portions on the outer and inner peripheral edges, respectively. The pair of second window portions 21b is disposed opposite to the first window portion 21a with a 90 ° interval therebetween and with the rotation axis O therebetween. The pair of second window portions 21b are arc-shaped openings extending in the circumferential direction and penetrating in the axial direction, and have pressing surfaces 21d on both end surfaces in the circumferential direction.

In addition, the first plate 211 is formed with a fixing hole 21e for fixing the friction plate 13 by the rivet 25. Four assembly holes 21f are formed in the second plate 212 at positions corresponding to the fixing holes 21e, and the assembly holes 21f can be penetrated by the rivet 25 and a tool for rivet fastening.

< hub Flange 22>

The hub flange 22 is a member of a device for transmitting torque from the input side plate 21 to the output side. As shown in fig. 1, 2 and 3, hub flange 22 has a hub 30 and a flange 40.

The hub 30 is a cylindrical member and is disposed in the center holes of the first plate 211 and the second plate 212. A spline hole is formed in the inner peripheral portion of the hub 30, and an output-side member can be spline-engaged with the spline hole. In addition, eight teeth 30a and a pair of protrusions 30b are formed on the outer peripheral surface of the hub 30. The pair of protrusions 30b are disposed opposite to each other across the rotation axis O.

As shown in fig. 3, the flange 40 is formed in a disc shape and is disposed between the first plate 211 and the second plate 212 in the axial direction. The flange 40 has a pair of first and second windows 41a and 41b and a pair of first and second stopper holes 42a and 42b (examples of notches), respectively. The flange 40 has an opening in the center thereof into which the hub 30 can be inserted, and has a plurality of recesses 43 that engage with the teeth 30a of the hub 30. The flange 40 is also formed with an opening 44 for constituting a pre-damper 50 described later. Although not shown in fig. 3, a pair of first stopper holes 42a and second stopper holes 42b are formed symmetrically with respect to the rotation axis O.

The first window holes 41a are disposed opposite to each other with the rotation axis O therebetween, and are formed at positions corresponding to the first window portions 21a of the first plate 211 and the second plate 212. The first window holes 41a have pressing surfaces 41c on both end surfaces in the circumferential direction. The pressing surface 41c on the R1 side (hereinafter, simply referred to as "R1 side") in the circumferential direction of the first window hole 41a has a protruding portion 41d, and the protruding portion 41d protrudes so as to protrude toward the opposing pressing surface 41c (i.e., in the circumferential direction).

The second window holes 41b are spaced at 90 ° intervals from the first window holes 41a, and are disposed opposite to each other across the rotation axis O. That is, the second window holes 41b are formed at positions corresponding to the second window portions 21b of the first plate 211 and the second plate 212. The second window holes 41b are formed in a rectangular shape, and the radial direction positions of the second window holes 41b (the center positions of the radial direction widths of the holes) are located on the inner side in the radial direction than the center positions in the radial direction of the first window holes 41 a. The second window hole 41b has pressing surfaces 41f on both end surfaces in the circumferential direction, and the distance between the pressing surfaces 41f is set shorter than the distance (length in the circumferential direction) between the pressing surfaces 21d of the second window portion 21b of the input side plate 21.

The first stopper hole 42a is an elongated hole extending in an arc shape on the R1 side of the first window hole 41 a. The first stopper hole 42a is formed separately from the first window hole 41 a. An end portion of the first stopper hole 42a on the side away from the first window hole 41a extends to the outside in the radial direction of the second window hole 41 b. Further, the end portion of the first window hole 41a close to the first stopper hole 42a extends toward the projection 41d of the first window hole 41 a.

The second stopper hole 42b is an elongated hole extending in an arc shape on the R2 side (hereinafter, simply referred to as "R2 side") in the circumferential direction of the first window hole 41 a. The end portion of the second stopper hole 42b on the R1 side communicates with the center portion of the first window hole 41a in the radial direction.

Further, in the first and second stopper holes 42a and 42b, a projection 42c bulging outward in the radial direction is formed in the vicinity of the end on the R2 side. The protruding portion 42c is formed at a position corresponding to the fixing hole 21e of the rivet 25 of the input side plate 21. The rivet 25 can be riveted with a tool through the protruding portion 42c and the assembly hole 21 f.

The stopper pin 24 penetrates the first stopper hole 42a and the second stopper hole 42b in the axial direction. Thereby, the input side plate 21 and the hub flange 22 can be relatively rotated within a range in which the stopper pins 24 can move in the stopper holes 42a and 42 b. In other words, the stopper mechanism 45 is constituted by the stopper pin 24 and the first and second stopper holes 42a and 42b, and the stopper pin 24 abuts against the end faces of the stopper holes 42a and 42b, whereby the relative rotation between the input side plate 21 and the hub flange 22 is prohibited.

< damper section 23>

As shown in fig. 1 and 3, the damper portion 23 includes a pair of coil springs 47 (an example of an elastic member), a pair of resin members 48, a pair of pre-dampers 50, and a hysteresis generating mechanism 60.

The pair of coil springs 47 and the pair of resin members 48 are mechanisms for elastically coupling the input side plate 21 and the hub flange 22 in the rotational direction.

Coil spring 47 and resin member 48

The coil spring 47 is accommodated in the first window hole 41a of the flange 40, and the resin member 48 is accommodated in the second window hole 41b of the flange 40. In addition, the coil spring 47 and the resin member 48 are supported in the axial direction and the radial direction by the respective first window portions 21a and second window portions 21b of the first plate 211 and the second plate 212.

The resin member 48 is disposed with a gap in the circumferential direction with respect to the second window portion 21b of the input side plate 21. On the other hand, the resin member 48 is disposed with no gap in the circumferential direction with respect to the second window holes 41b of the flange 40.

A first spring seat 71 is provided on the R1-side end surface of the coil spring 47. Further, a second spring receiver 72 is provided on the R2-side end surface of the coil spring 47.

Here, the coil spring 47 and a part of the rivet 25 are disposed so as to overlap the installation diameter P of the stopper pin 24.

Pre-damper 50-

The pair of pre-dampers 50 is a mechanism for elastically coupling the hub 30 and the flange 40 in the rotational direction. As shown in fig. 3, the pair of pre-dampers 50 are disposed opposite to each other across the rotation axis O. Each pre-damper 50 is disposed radially inward of the second window hole 41b so as to be sandwiched between the pair of first window holes 41 a. Each pre-damper 50 has a pair of coil springs 51. Each coil spring 51 is disposed between the pair of protrusions 30b of the hub 30 and the end surface of the opening 44 of the flange 40.

Hysteresis generating means 60

The hysteresis generating mechanism 60 is disposed between the first plate 211 and the second plate 212 and the hub flange 22 in the axial direction. The hysteresis generating mechanism 60 is constituted by a sleeve, a conical spring, and the like. The hysteresis generating mechanism 60 generates a small hysteresis torque when the hub 30 and the flange 40 rotate relative to each other. In addition, the hysteresis generating mechanism 60 generates a relatively large hysteresis torque when the first and second plates 211 and 212 and the hub flange 22 rotate relative to each other.

[ Assembly of Torque limiter Unit 10 and damper Unit 20]

In assembling the damper device 1, first, the torque limiter unit 10 and the damper unit 20 are assembled separately. Thereafter, the inner peripheral portion of the friction plate 13 of the torque limiter unit 10 and the outer peripheral portion of the second plate 212 are rivet-fixed by the rivet 25.

At this time, since the assembly holes 21f are formed in the second plate 212 and the stopper holes 42a and 42b and the protruding portion 42c are formed in the flange 40, the first plate 211 and the friction plate 13 can be fixed by caulking the rivet 25 by passing the rivet 25 and a caulking tool through these holes and the like.

Here, the rivet 25 for fixing the torque limiter unit 10 and the damper unit 20 is assembled by the stopper holes 42a and 42 b. This makes it possible to overlap the inner peripheral portion of the torque limiter unit 10 and the outer peripheral portion of the damper unit 20, thereby reducing the size of the device.

[ actions ]

The torque transmitted from the engine to the flywheel is input to the damper unit 20 via the torque limiter unit 10. In the damper unit 20, a torque is input to the input side plate 21 to which the friction plate 13 of the torque limiter unit 10 is fixed, and the torque is transmitted to the hub flange 22 via the pre-damper 50, the coil spring 47, and the resin member 48. Then, power is transmitted from the hub flange 22 to the output-side motor, generator, transmission, and the like.

Further, for example, at the time of engine start, since the inertia amount on the output side is large, an excessive torque may be transmitted from the output side to the engine. In this case, the torque transmitted to the engine side by the torque limiter unit 10 is limited to a prescribed value or less.

[ other embodiments ]

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

(a) The specific configurations of the damper unit 20 and the torque limiter unit 10 are not limited to the above-described embodiment.

(b) In the above embodiment, the stopper mechanism 45 is constituted by the stopper holes 42a, 42b and the stopper pin 24, but may be constituted by a notch extending in the circumferential direction and opening in the radial direction instead of the stopper holes 42a, 42 b.

(b) In the above embodiment, a part of the rivet 25 is disposed at a position overlapping the attachment diameter of the stopper pin 24, but the disposition of the rivet 25 is not limited to this.

Description of the reference numerals

15 … conical spring (urging member); 21 … input side plate (first rotating body); 22 … hub flange (second rotating body); 24 … retaining pin; 25 … rivet (fixing member); 30 … a hub; a 40 … flange; 41a … first aperture; 42a … first stop hole (notch); 42b … second stop hole (notch); 42c … projection; a 45 … stop mechanism; 47 … coil spring (elastic member).