阅读说明：本技术 带扭矩限制器的减振装置 (Vibration damping device with torque limiter ) 是由 上原宏 于 2020-03-25 设计创作，主要内容包括：本发明涉及带扭矩限制器的减振装置。在具有扭矩限制功能的减振装置中,抑制径向的尺寸,实现装置的小型化。该带扭矩限制器的减振装置(1)设置在动力源侧部件与输出侧部件之间。带扭矩限制器的减振装置具备减振单元(10)以及扭矩限制单元(20)。减振单元(10)具有彼此相对地配置的第一板(11)以及第二板(12)。第一板(11)以及第二板(12)在外周端部具有相互连结的第一连结部(11c)以及第二连结部(12c)。扭矩限制单元(20)具有摩擦盘(23),摩擦盘(23)在内周部具有第三连结部(27b)。第三连结部(27b)在第一连结部(11c)以及第二连结部(12c)的径向内侧连结于减振单元(10)。(The invention relates to a damping device with a torque limiter. A vibration damping device having a torque limiting function is reduced in size in the radial direction and is reduced in size. The damper device (1) with a torque limiter is disposed between a power source-side member and an output-side member. A vibration damping device with a torque limiter is provided with a vibration damping unit (10) and a torque limiting unit (20). The vibration damping unit (10) has a first plate (11) and a second plate (12) which are arranged to face each other. The first plate (11) and the second plate (12) have a first connecting portion (11c) and a second connecting portion (12c) at the outer peripheral end portion, which are connected to each other. The torque limiting unit (20) has a friction disk (23), and the friction disk (23) has a third connecting section (27b) on the inner peripheral section. The third connecting portion (27b) is connected to the vibration damping unit (10) radially inward of the first connecting portion (11c) and the second connecting portion (12 c).)

1. A vibration damping device with a torque limiter, which is provided between a power source-side member and an output-side member, comprising:

a vibration damping unit connected to the output-side member; and

a torque limiting unit that limits torque transmitted between the power source-side member and the vibration damping unit,

the vibration damping unit includes a first plate and a second plate which are disposed opposite to each other and each have a disk shape, the first plate and the second plate having a first connecting portion and a second connecting portion which are connected to each other at outer peripheral ends thereof,

the torque limiting unit includes a friction disk having a third coupling portion at an inner peripheral portion thereof, and the third coupling portion is coupled to the damper unit radially inward of the first coupling portion and the second coupling portion.

2. The vibration damping device with a torque limiter according to claim 1,

the first plate has:

a disk-shaped main body portion;

an axial extension portion extending from an outer peripheral portion of the main body portion toward the second plate side; and

a radial extension portion extending radially outward from a tip portion of the axial extension portion,

the first connecting portion is the radial extension.

3. The damping device with a torque limiter according to claim 1 or 2,

the friction disc has an annular portion provided with friction material,

the third connecting portion is formed to protrude radially inward from an inner peripheral end of the annular portion, and is connected to the first plate.

4. The vibration damping device with a torque limiter according to claim 3,

the first plate has a plurality of first window portions arranged in a circumferential direction, and the second plate has a plurality of second window portions arranged in a circumferential direction,

the vibration damping unit further has a plurality of elastic members held by the first window portion and the second window portion,

the third connecting portion is disposed between the first window portions adjacent to each other in the circumferential direction.

5. The vibration damping device with a torque limiter according to claim 4,

a radial position of the first window portion overlaps a partial radial position of the third coupling portion.

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

the torque limiting unit has:

a first clamping plate and a second clamping plate which are configured in a manner of clamping the friction disc and are mutually fixed to be incapable of moving in the axial direction; and

and an urging member that is disposed so as to be sandwiched between the first clamping plate and the second clamping plate together with the friction disk, and that urges the friction disk.

7. The vibration damping device with a torque limiter according to claim 6,

the torque limiting unit is capable of self-holding in a state where the friction disk and the urging member are sandwiched between the first clamping plate and the second clamping plate,

the self-sustaining torque limiting unit is coupled to the damper unit by a third coupling portion of the friction disk.

8. The vibration damping device with a torque limiter according to any one of claims 1 to 7,

the second plate has an assembly hole for attaching the damper unit to the power source-side member at a position corresponding to the third connecting portion of the friction disk.

Technical Field

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

Background

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

The damper device of patent document 1 includes a damper portion having a pair of plates and a plurality of torsion springs, and a torque limiter provided on an outer peripheral side of the damper portion. The torque limiter and the vibration damping portion are connected by a rivet. The plate of the torque limiter is then bolted to the flywheel.

Here, the torque limiter limits the torque transmitted between the damper portion and the flywheel, and prevents excessive torque from being transmitted therebetween.

Patent document 1: japanese patent laid-open publication No. 2011-

The vibration damping device of patent document 1 has a torque limiter disposed on the outer peripheral side of a vibration damping portion. More specifically, the damper portion has a pair of disk-shaped side plates as the input-side rotating body, and the torque limiter has friction disks to which friction members are fixed on both side surfaces. Further, an inner peripheral portion of the friction disk is fixed to an outer peripheral portion of one of the pair of side plates by a rivet.

In such a conventional damper device with a torque limiter, the radial dimension increases, which hinders the miniaturization of the device.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vibration damping device having a torque limiting function, which can reduce the size of the device while suppressing the radial dimension.

(1) The damper device with a torque limiter according to the present invention is provided between a power source-side member and an output-side member. The damping device with the torque limiter is provided with a damping unit and a torque limiting unit. The vibration damping unit is coupled to the output-side member. The torque limiting unit limits torque transmitted between the power source-side member and the vibration damping unit. The vibration damping unit has a disc-shaped first plate and a disc-shaped second plate disposed to face each other. The first plate and the second plate have a first connecting portion and a second connecting portion connected to each other at outer peripheral ends. The torque limiting unit includes a friction disk having a third coupling portion on an inner peripheral portion thereof. The third coupling portion is coupled to the vibration damping unit radially inward of the first coupling portion and the second coupling portion.

In this device, torque transmitted between the power source-side member and the vibration damping unit is limited by the torque limiting unit. Therefore, when the present device is mounted on, for example, a hybrid vehicle, it is possible to prevent excessive torque from being transmitted from the output side to the engine side at the time of engine start or the like.

Here, the torque limiter unit is coupled to the damper unit radially inward of first and second coupling portions that couple the first plate and the second plate of the damper unit. That is, the torque limiting unit is coupled to the vibration damping unit at a position radially inward of the conventional device. Therefore, the present device can suppress the radial dimension as compared with a conventional damper device with a torque limiter.

(2) Preferably, the first plate has a disk-shaped main body portion, an axial extension portion, and a radial extension portion. The axial extension portion extends from the outer peripheral portion of the main body portion toward the second plate side. The radial extension portion extends radially outward from a front end portion of the axial extension portion. The first connecting portion is a radial extension portion.

Here, when the main body portion, the axial direction extending portion, and the radial direction extending portion of the first plate are integrally formed by press working, the working becomes easy.

(3) Preferably, the friction disc has an annular portion provided with friction material. Preferably, the third connecting portion is formed to protrude radially inward from an inner peripheral end of the annular portion, and is connected to the first plate.

(4) Preferably, the first plate and the second plate each have a plurality of first windows and second windows arranged in a circumferential direction. Preferably, the vibration damping unit further includes a plurality of elastic members held by the first window portion and the second window portion. The third connecting portion is disposed between the first window portions adjacent to each other in the circumferential direction.

(5) Preferably, a radial position of the first window portion overlaps a partial radial position of the third coupling portion.

(6) Preferably, the torque limiting unit has first and second clamping plates and an urging member. The first and second clamp plates are arranged to sandwich the friction disk therebetween, and are fixed to each other so as not to be movable in the axial direction. The urging member is disposed so as to be sandwiched between the first clamping plate and the second clamping plate together with the friction disk, and urges the friction disk.

(7) Preferably, the torque limiting unit is self-retainable in a state in which the friction disk and the urging member are sandwiched between the first clamping plate and the second clamping plate. The self-holding torque limiting unit is coupled to the damper unit via the third coupling portion of the friction disk.

Here, the torque limiting unit can be self-sustained by the unit alone. That is, the torque limiting unit can be separately assembled with the vibration damping unit to achieve sub-assembly. Therefore, in the assembly of the entire device, the torque limiter unit to be sub-assembled in advance may be connected to the damper unit, and the assembly work is facilitated.

Further, since the torque limiter unit can be formed as a sub-assembly, when the transmission torque capacity is to be changed, the torque limiter unit can be changed, and thus various specifications can be easily satisfied.

(8) Preferably, the second plate has an assembly hole for attaching the damper unit to the power source-side member at a position corresponding to the third connecting portion of the friction disk.

Here, when the torque limiter unit is not required as the damper device, the torque limiter unit, which is the friction disk, may be removed from the first plate and only the damper unit may be attached to the power source-side member. In this case, only the vibration damping unit can be attached to the power source-side member using a bolt or the like through a hole for coupling the first plate and the friction disk. Further, when the bolt or the like is attached to the power source-side member, the bolt or the like can be fastened by the assembling hole of the second plate, and therefore, the work is facilitated.

Effects of the invention

With the above-described present invention, in the damper device having the torque limiting function, the radial dimension can be suppressed, and the device can be downsized.

Drawings

Fig. 1 is a sectional view of a vibration damping device according to an embodiment of the present invention.

Fig. 2 is a front view of the vibration damping device of fig. 1.

Fig. 3 is a diagram showing the torque limiting unit of the vibration damping device of fig. 1 extracted.

Fig. 4 is a partial front view of the torque limiting unit.

Fig. 5 is a diagram showing another mode of use of the vibration damping device.

Fig. 6 is a diagram showing still another mode of use of the vibration damping device.

Fig. 7 is a diagram showing still another mode of use of the vibration damping device.

Description of the reference numerals

1: a vibration damping device; 10: a vibration reduction unit; 11: a first plate; 11 c: a first connecting portion; 12: a second plate; 12 b: a hole for assembly; 12 c: a second coupling portion; 13: a hub flange; 14: a torsion spring; 21: a first clamping plate; 22: a second clamping plate; 23: a friction disk; 24: pressing a plate; 25: a conical spring; 27 a: a main body portion (annular portion); 27 b: and a third connecting portion.

Detailed Description

[ integral Structure ]

Fig. 1 is a sectional view of a damper device 1 with a torque limiter (hereinafter, sometimes simply referred to as "damper device") according to an embodiment of the present invention. Fig. 2 is a front view of the vibration damping device 1, and a part of the vibration damping device is shown with its constituent members removed. In fig. 1, an engine is disposed on the left side of the vibration damping device 1, and a drive unit including a motor, a transmission, and the like is disposed on the right side.

The damper device 1 is provided between the flywheel and the input shaft of the drive unit, and is a device for damping rotational fluctuation while limiting torque transmitted between the engine and the drive unit. The damper device 1 has a damper unit 10 and a torque limiting unit 20.

[ damping Unit 10]

As shown in fig. 1, the damper unit 10 includes: a first plate 11, a second plate 12, a hub flange 13, a plurality of torsion springs 14 (an example of an elastic member), and a hysteresis generating mechanism 15.

< first plate 11 >

The first plate 11 is coupled to a member constituting the torque limiting unit 20. The first plate 11 has: a main body portion 11a formed in a disc shape, a plurality of stopper portions 11b (an example of an axially extending portion), and a first coupling portion 11 c. The plurality of first window portions 11d are arranged in a circumferential direction on the outer peripheral portion of the main body portion 11 a. The first window portion 11d has: the bearing includes a hole penetrating in an axial direction, and holding portions formed on outer and inner peripheral edges of the hole. The stopper 11b is formed by bending the outer peripheral end of the first plate 11 toward the second plate 12. The first connecting portion 11c is formed by bending the tip of the stopper portion 11b further outward in the radial direction. Further, a plurality of rivet holes 11e for attaching the torque limiter unit 20 are formed in the outer peripheral portion of the first plate 11.

< second plate 12 >

The second plate 12 is disposed opposite to the first plate 11 with a space therebetween in the axial direction. The second plate 12 is formed in a substantially disk shape having a linear portion in a part of an outer peripheral surface. The outermost diameter of the second plate 12 is the same as the outer diameter of the first plate 11. A plurality of second window portions 12d are formed in the outer peripheral portion of the second plate 12 at positions facing the first window portions 11d of the first plate 11. The second window portion 12d has: the bearing includes a hole penetrating in an axial direction, and holding portions formed on outer and inner peripheral edges of the hole. In the second plate 12, a second coupling portion 12c is formed in an outer peripheral portion between the adjacent second window portions 12d in the circumferential direction. The first connecting portion 11c of the first plate 11 and the second connecting portion 12c of the second plate 12 are fixed by a rivet 16. Thereby, the first plate 11 and the second plate 12 cannot move relative to each other in the axial direction as well as in the rotational direction.

In addition, a plurality of holes 12b for assembly work are formed in the outer peripheral portion of the second plate 12 at positions corresponding to the rivet holes 11e of the first plate 11.

< hub flange 13 >

The hub flange 13 has: a cylindrical hub 17 formed at the center portion, and a flange 18 extending radially outward from the outer peripheral surface of the hub 17. A spline hole 17a is formed in the inner peripheral surface of the hub 17, and an input shaft of the drive unit can be spline-fitted into this spline hole 17 a. The flange 18 is formed in a disk shape and is disposed between the first plate 11 and the second plate 12 in the axial direction. The flange 18 has a plurality of receiving portions 18 a. The receiving portions 18a are formed at positions corresponding to the first window portion 11d of the first plate 11 and the second window portion 12d of the second plate 12. Further, a plurality of V-shaped notches 18b that open radially outward are formed in the outer peripheral end portion of the flange 18.

A plurality of projections 18c projecting radially outward are formed on the outer peripheral surface of the flange 18. The stopper portion 11b of the first plate 11 can abut against an end surface of the projection 18c in the circumferential direction. That is, the stopper portion 11b of the first plate 11 and the protrusion 18c of the flange 18 constitute a stopper mechanism for limiting the torsion angle between the first and second plates 11 and 12 and the hub flange 13 within a predetermined angular range.

< torsion spring 14 >

The plurality of torsion springs 14 are accommodated in the accommodating portion 18a of the hub flange 13, and are axially and radially held by the first window portion 11d of the first plate 11 and the second window portion 12d of the second plate 12. Both end surfaces of the torsion spring 14 in the circumferential direction can be brought into contact with the end surfaces of the window portions 11d and 12d and the housing portion 18a in the circumferential direction.

< delay generating means 15 >

The hysteresis generating mechanism 15 includes: a first friction plate 31, a second friction plate 32, and a conical spring 33.

The first friction plate 31 is disposed between the inner peripheral portion of the first plate 11 and the inner peripheral portion of the flange 18 of the hub flange 13 in the axial direction. The first friction plate 31 has a plurality of coupling protrusions 31a protruding in the axial direction, and the coupling protrusions 31a are coupled to holes 11f formed in the first plate 11. Therefore, the first friction plate 31 cannot rotate relative to the first plate 11.

The second friction plate 32 is disposed between the inner peripheral portion of the second plate 12 and the inner peripheral portion of the flange 18 of the hub flange 13 in the axial direction. The second friction plate 32 has a plurality of coupling protrusions 32a protruding in the axial direction, and the coupling protrusions 32a are coupled to the holes 12e formed in the second plate 12. Therefore, the second friction plate 32 cannot rotate relative to the second plate 12.

The conical spring 33 is disposed between the first plate 11 and the first friction plate 31 in the axial direction. The conical spring 33 presses the first friction plate 31 against the flange 18, and presses the second friction plate 32 against the flange 18 via the first plate 11 and the second plate 12 fixed to the first plate 11.

In the hysteresis generating mechanism 15, when the first and second plates 11 and 12 and the hub flange 13 rotate relative to each other, frictional resistance (hysteresis torque) is generated between the first friction plate 31 and the flange 18, and frictional resistance is generated between the second friction plate 32 and the flange 18.

[ Torque limiting Unit 20]

The torque limiting unit 20 is disposed on the outer peripheral side of the damper unit 10. The torque limiting unit 20 limits the torque transmitted between the flywheel and the damping unit 10. As shown in fig. 3, the torque limiting unit 20 has: a first clamping plate 21, a second clamping plate 22, a friction disc 23, a pressure plate 24 and a conical spring 25. Note that fig. 3 is a diagram showing a portion of the torque limiting unit 20 of fig. 1 extracted.

< first holding plate 21 and second holding plate 22 >

The first clamping plate 21 has: an annular friction portion 21a and a fixed portion 21 b. The fixing portion 21b is formed by axially displacing the outer peripheral portion of the friction portion 21a toward the second clamping plate 22. The second clamping plate 22 has: an annular support portion 22a and a fixing portion 22 b. The inner diameter of the support portion 22a is larger than the inner diameter of the friction portion 21a of the first clamping plate 21. That is, the radial width of the support portion 22a is narrower than the width of the friction portion 21a of the first clamping plate 21. The fixing portion 22b of the second clamping plate 22 is formed by offsetting the outer peripheral portion of the support portion 22a toward the first clamping plate 21 in the axial direction. The fixing portion 21b of the first clamping plate 21 and the fixing portion 22b of the second clamping plate 22 are fixed to each other by a plurality of rivets 26 (see fig. 1).

Note that a plurality of holes 21c and 22c (see fig. 1) for fixing the torque limiting unit 20 to the flywheel are formed in the fixing portions 21b and 22b of the first clamping plate 21 and the second clamping plate 22, respectively.

< friction disk 23 >

As shown in fig. 3, the friction disk 23 has: a core plate 27 and a pair of friction members 28 fixed to both side surfaces of the core plate 27 by rivets. As shown in fig. 3 and 4, the core plate 27 includes: a body portion 27a (an example of an annular portion) formed in a substantially annular shape, and a plurality of third coupling portions 27 b. Fig. 4 is a partial front view of the torque limiting unit 20. The third coupling portions 27b project radially inward from the inner peripheral end of the body portion 27a and are formed at equal angular intervals in the circumferential direction. A coupling hole 27c is formed in the third coupling portion 27 b. The core plate 27 is fixed to the outer peripheral portion of the first plate 11 by rivets 29 (see fig. 1) inserted through the connecting holes 27c and the rivet holes 11e of the first plate 11. Of the pair of friction members 28, the flywheel-side friction member abuts on the friction portion 21a of the first clamping plate 21.

< pressure plate 24 and conical spring 25 >

The pressure plate 24 and the conical spring 25 are disposed between the friction disk 23 and the support portion 22a of the second clamping plate 22.

The pressure plate 24 is formed in an annular shape, and the friction member 28 of the friction disk 23 is sandwiched between the pressure plate 24 and the friction portion 21a of the first clamping plate 21. As shown in fig. 1, a plurality of claws 24a are formed on the outer peripheral portion of the platen 24, and the claws 24a are coupled to a plurality of coupling holes 22d formed in the second clamping plate 22.

The conical spring 25 is disposed between the pressure plate 24 and the support portion 22a of the second clamping plate 22. The conical spring 25 presses the friction plate 23 against the friction portion 21a of the first clamping plate 21 via the pressure plate 24.

< positional relationship between damping unit 10 and torque limiting unit 20 >

The third coupling portion 27b of the friction disk 23 is located radially inward of the first coupling portion 11c and the second coupling portion 12c of the first plate 11 and the second plate 12. In addition, the third coupling portion 27b is disposed between the adjacent first window portions 11d in the circumferential direction in front view. Further, the radial position of a part of the third coupling portion 27b overlaps the radial position of the first window portion 11 d. The torque limiter unit 20 has an inner diameter (inner diameter of the first clamping plate 21) smaller than the outer diameters of the first plate 11 and the second plate 12 of the damper unit 10. That is, the damper unit 10 and the torque limiter unit 20 are arranged to overlap each other in the radial direction when viewed in the direction along the rotation axis.

[ actions ]

The power transmitted from the engine to the flywheel is input to the damping unit 10 via the torque limiting unit 20. In the damper unit 10, power is input to the first plate 11 and the second plate 12 of the friction disk 23 to which the torque limiting unit 20 is fixed, and the power is transmitted to the hub flange 13 via the torsion spring 14. Then, power is transmitted from the hub flange 13 to the output-side motor, generator, transmission, and the like.

Further, for example, when the engine is started, an excessive torque may be transmitted from the output side to the engine because the inertia amount on the output side is large. In this case, the torque transmitted to the engine side is limited to a prescribed value or less by the torque limiting unit 20.

In the damper unit 10, when power is transmitted from the first plate 11 and the second plate 12 to the torsion spring 14, the torsion spring 14 is compressed. Further, the torsion spring 14 repeatedly expands and contracts due to torque variation. When the torsion spring 14 expands and contracts, torsion occurs between the first plate 11 and the second plate 12 and the hub flange 13. Due to this torsion, the hysteresis generating mechanism 15 operates and generates a hysteresis torque. This attenuates torque fluctuations.

[ Assembly ]

In the torque limiting unit 20, the friction disk 23, the pressure plate 24, and the conical spring 25 are sandwiched between the first clamping plate 21 and the second clamping plate 22, and thus a sub-unit structure can be realized. That is, in the process before the torque limiting unit 20 is attached to the damper unit 10, it is possible to hold itself only with the torque limiting unit 20. The damper unit 10 can be assembled in advance in another process in the same manner.

When the torque limiter unit 20 is mounted to the damper unit 10, the connecting holes 27c of the third connecting portions 27b of the friction disks 23 are aligned with the rivet holes 11e of the first plate 11, and the second plate 12 can be fixed to the connecting holes 12b by rivet fastening.

Here, the torque limiter unit 20 can be centered (positioned in the radial direction) with respect to the damper unit 10 by fixing the rivets 29 and the holes 27c and 11e through which the rivets pass.

[ other embodiments ]

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

(a) When the torque limiter unit 20 is not required, as shown in fig. 5, the bolt 35 is attached to the rivet hole 11e of the first plate 11 before the damper unit 10 is assembled. Then, the bolt 35 is fastened with a tool through the hole 12b for assembly work of the second plate 12, and the damper unit 10 can be attached to the flywheel 40.

As shown in fig. 6, the damper unit 10 may be attached to the flywheel via the drive plate 41 instead of the friction disk. The structure of the damper unit 10 is the same as that of the foregoing embodiment.

In addition, when the space for installing the damper unit is narrow, as shown in fig. 7, the drive plate 41 may be fixed together with the first plate 11 and the second plate 12 by the rivet 29 with the first plate 11 and the second plate 12 being positioned opposite to each other.

(b) The specific configurations of the vibration damping unit 10 and the torque limiting unit 20 are not limited to the foregoing embodiments.