Damper device with torque limiter

Abstract

A damper device with a torque limiter, which realizes a reduction in the radial direction of the device and enables assembly of a torque limiter unit and a damper unit on a one-by-one basis. The damper device (1) includes a damper unit (20) and a torque limiter unit (10). The damper unit (20) has a stop mechanism (45) having a stop hole (42a, 42b) formed in a flange (40) and a stop pin (24) fixed to an input side plate (21). The torque limiter unit (10) has a ring-shaped friction plate (13), an inner peripheral portion of the ring-shaped plate (13) being fixed to an outer peripheral portion of an input side rotating body (21) by a rivet (25), the rivet (25) passing through the stop hole (42a, 42b) and being assembled.

Description

TECHNICAL FIELD

[0001] The present application relates to a damper device, and particularly to a damper device provided with a torque limiter between a member on a power source side and a member on an output side. BACKGROUND

[0002] In a hybrid vehicle including an engine and a motor, for example, in order to prevent an excessive torque from being transmitted from an output side to an engine side at the time of engine start and the like, a damper device provided with a torque limiter as shown in Patent Literature 1 is used.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2013-24364 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the damper device provided with a torque limiter shown in Patent Literature 1, there is a damper portion having a pair of plates and a plurality of torsion springs, and a torque limiter is provided on an outer peripheral side of the damper portion. The torque limiter and the damper portion are coupled by a rivet. In detail, a gusset of the torque limiter and the pair of side plates of the damper portion are all fixed by one rivet.

[0008] In such a damper device provided with a torque limiter, since the gusset of the torque limiter is arranged further outward in the radial direction of the pair of side plates of the damper portion, it is difficult to downsize the device in the radial direction.

[0009] Further, in the damper device provided with a torque limiter, it is preferable to assemble a torque limiter unit and a damper unit separately, and then to assemble the two units. However, in the damper device of Patent Literature 1, for the same reason as described above, it is not possible to assemble the torque limiter unit and the damper unit separately.

[0010] The present application has been made to solve the above-described problems, and has an object to provide a damper device provided with a torque limiter, in which the device is downsized in the radial direction, and the torque limiter unit and the damper unit can be assembled separately.

[0011] MEANS FOR SOLVING THE PROBLEMS

[0012] (1) The damper device with torque limiter of the present application is provided between a component on the power source side and a component on the output side. The damper device with torque limiter includes a damper unit and a torque limiter unit. The damper unit is linked to the component on the output side. The torque limiter unit limits the torque transmitted between the component on the power source side 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 in the shape of a circular plate. The second rotating body has a flange opposite the first rotating body in the axial direction. The second rotating body is rotatable relative to the first rotating body. The second rotating body is linked to the component on the output side. The stopper mechanism has a notch and a stopper pin. The notch is formed in the flange and extends in the shape of a circular arc. The stopper pin is fixed to the first rotating body. The stopper pin passes through the notch in the axial direction. The stopper mechanism limits the relative rotation angle of the first rotating body and the second rotating body to a prescribed angle range. The elastic member elastically links the first rotating body and the second rotating body in the rotational direction. The torque limiter unit has a ring-shaped friction plate. The inner peripheral portion of the ring-shaped friction plate is fixed to the outer peripheral portion of either one of the first rotating body and the second rotating body by a fixing member. The fixing member is assembled by passing through the notch of the flange.

[0013] In this device, the second rotating body has a fixing member passing through the notch of the stopper mechanism for fixing the fixing member of the torque limiter unit and the damper unit. That is, the torque limiter unit and the damper unit are assembled with the inner peripheral portion of the torque limiter overlapping the outer peripheral portion of the damper unit by passing through the notch with the stopper pin. Therefore, compared with the conventional device, the radial direction miniaturization of the device can be achieved. In addition, for the same reason, the torque limiter unit and the damper unit can be assembled on the basis of being assembled respectively.

[0014] (2) Preferably, the first rotating body has a first plate and a second plate in the shape of a circular plate, which are arranged in a manner of sandwiching the flange in the axial direction. The first plate and the second plate are fixed by the stopper pin so as not to move in the axial direction and not to rotate relative to each other.

[0015] (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.

[0016] Here, the fixing member that fixes the friction plate to the first plate is assembled by passing through the assembly hole of the second plate and the notch of the flange.

[0017] (4) Preferably, the fixing member and the elastic member are arranged in a manner of overlapping a portion of each with the mounting diameter of the stopper pin.

[0018] (5) Preferably, the notch of the stopper mechanism is a long hole in the shape of a circular arc, the long hole has a protruding portion protruding to the outside in the radial direction in a part of the circumferential direction, and the fixing member passes through the long hole including the protruding portion.

[0019] (6) Preferably, the torque limiter unit has a fixed plate, a pressure plate, and a force applying 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 force applying member presses the friction plate against the fixed plate via the pressure plate.

[0020] Effects of Invention

[0021] As described above, the damper device with torque limiter according to the present application can realize the downsizing in the radial direction of the device, and can assemble the torque limiter unit and the damper unit on the basis of each assembly. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a sectional view of a damper device with torque limiter according to an embodiment of the present application.

[0023] Figure 2 is a sectional view of a damper device with torque limiter according to an embodiment of the present application. Figure 1 is a sectional view of a damper device with torque limiter according to an embodiment of the present application.

[0024] Figure 3 is a front view of a damper unit. DETAILED DESCRIPTION

[0025] [Overall Configuration]

[0026] Figure 1 and Figure 2 is a sectional view of a damper device with torque limiter 1 according to an embodiment of the present application (hereinafter, also referred to simply as "damper device"). In addition, Figure 3 is a front view of the damper unit 1, which shows a state where a part of the members are removed or a part of the members are deleted. In Figure 1 and Figure 2 , the O-O line is the rotation axis. In Figure 1 and Figure 2 , an engine is arranged on the left side of the damper device 1, and a drive unit including a motor, a transmission device, and the like is arranged on the right side of the damper device 1.

[0027] Further, in the following description, the axial direction is the direction in which the rotation axis O of the damper device 1 extends. In addition, the circumferential direction refers to the circumferential direction of a circle centered on the rotation axis O, and the radial direction refers to the radial direction of the circle centered on the rotation axis O. Further, the concept of the circumferential direction does not need to be completely identical to the circumferential direction of the circle centered on the rotation axis O, and for example, the concept of the circumferential direction also includes the left-right direction shown in Figure 3 with reference to the window portion and the window hole. In addition, the concept of the radial direction does not need to be completely identical to the diameter direction of the circle centered on the rotation axis O, and for example, the concept of the radial direction also includes the up-down direction shown in Figure 3 with reference to the window portion and the window hole.

[0028] The damper device 1 is provided between a flywheel (not shown) and an input shaft of a drive unit, and is used to limit torque transmitted between the engine and the drive unit and damp rotational fluctuations. The damper device 1 includes a torque limiter unit 10 and a damper unit 20 .

[0029] [Torque limiter unit 10]

[0030] The torque limiter unit 10 is arranged 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 includes a first fixing plate 11 (an example of a fixing plate), a second fixing plate 12, a friction plate 13, a pressure plate 14, and a conical spring 15 (an example of a biasing member).

[0031] The first fixing plate 11 is fixed to a component on the power source side. The first and second fixing plates 11 and 12 are fixed to each other by multiple rivets 16. The friction plate 13 is an annular plate. A pressure plate 14 and a conical spring 15 are positioned between the second fixing plate 12 and the friction plate 13. The conical spring 15 presses the friction plate 13 toward the first fixing plate 11 via the pressure plate 14.

[0032] [Damper unit 20]

[0033] The damper unit 20 includes 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 .

[0034] <Input side plate 21>

[0035] 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 the "input side plate 21"). Figure 3 As shown, the first plate 211 and the second plate 212 are both annular components with a central hole. Figure 3 Only the second plate 212 is shown, but the first plate 211 and the second plate 212 are identical in basic structure. The first plate 211 and the second plate 212 are connected by four stop pins 24 (see Figure 3 ) are fixed to each other at a predetermined interval in the axial direction. Therefore, the first plate 211 and the second plate 212 cannot move relative to each other in the axial direction and the rotational direction. Figure 1 As shown, 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).

[0036] like Figure 3As shown, a pair of first window portions 21a and a pair of second window portions 21b are formed in the first plate 211 and the second plate 212, respectively. The pair of first window portions 21a are arranged opposite to each other with the rotation axis O interposed therebetween. The pair of first window portions 21a are formed by cutting and standing up the respective plates 211, 212, have pressing surfaces 21c at both end surfaces in the circumferential direction, and have support portions at the outer periphery and the inner periphery, respectively. In addition, the pair of second window portions 21b are arranged opposite to each other with the rotation axis O interposed therebetween at an interval of 90° from the pair of first window portions 21a. The pair of second window portions 21b are circular arc-shaped openings extending in the circumferential direction and penetrating in the axial direction, and have pressing surfaces 21d at both end surfaces in the circumferential direction. Figure 3 In the second plate 212, although the first window portions 21a and the second window portions 21b are shown, the first window portions 21a and the second window portions 21b of the first plate 211 are also similarly configured. The pair of first window portions 21a are formed by cutting and standing up the respective plates 211, 212, have pressing surfaces 21c at both end surfaces in the circumferential direction, and have support portions at the outer periphery and the inner periphery, respectively. In addition, the pair of second window portions 21b are arranged opposite to each other with the rotation axis O interposed therebetween at an interval of 90° from the pair of first window portions 21a. The pair of second window portions 21b are circular arc-shaped openings extending in the circumferential direction and penetrating in the axial direction, and have pressing surfaces 21d at both end surfaces in the circumferential direction.

[0037] In addition, the first plate 211 is formed with a fixing hole 21e for fixing the friction plate 13 by a rivet 25. Further, the second plate 212 is formed with four assembly holes 21f at positions corresponding to the fixing hole 21e, the assembly holes 21f being capable of penetrating the rivet 25 and a tool for riveting the rivet.

[0038] <Hub flange 22>

[0039] The hub flange 22 is a component of a device for transmitting torque from the input-side plate 21 to the output side. As shown in Figs. 1 and 2, the hub flange 22 has a hub 30 and a flange 40. Figure 1 Figure 2 and Figure 3 As shown in Figs. 1 and 2, the hub flange 22 has a hub 30 and a flange 40.

[0040] The hub 30 is a cylindrical component arranged in the central hole 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 components on the output side can be spline-engaged with the spline hole. In addition, eight teeth 30a and a pair of protrusion portions 30b are formed in the outer peripheral surface of the hub 30. The pair of protrusion portions 30b are arranged opposite to each other with the rotation axis O interposed therebetween.

[0041] As shown in Figs. 1 and 2, the hub flange 22 has a hub 30 and a flange 40. Figure 3 The flange 40 is formed in a circular plate shape and arranged between the first plate 211 and the second plate 212 in the axial direction. The flange 40 has a pair of first window holes 41a and a pair of second window holes 41b, and a pair of first stopper holes 42a (one example of a notch) and a pair of second stopper holes 42b (one example of a notch), respectively. In addition, the flange 40 is formed with an opening in the central portion into which the hub 30 is inserted, and is formed with a plurality of recesses 43 engaged with the teeth 30a of the hub 30. The flange 40 is also formed with an opening 44 for constituting a pre-shock absorber 50 described later. Further, although the flange 40 is shown as a single component in Figs. 1 and 2, the flange 40 can be formed by joining a plurality of components. Figure 3 ​A pair of first and second stopper holes 42a and 42b are formed symmetrically with respect to the rotation axis O.

[0042] The first window hole 41a is arranged in opposition with respect to the rotation axis O and is formed at a position corresponding to the first window portion 21a of the first and second plates 211 and 212. The first window hole 41a has pressing surfaces 41c at both ends in the circumferential direction. Further, the pressing surface 41c on the R1 side (hereinafter, simply referred to as "R1 side") of the first window hole 41a has a convex portion 41d protruding in a manner bulging toward the opposite pressing surface 41c (i.e., the circumferential direction).

[0043] The second window hole 41b is arranged in opposition with respect to the rotation axis O at an interval of 90° from the first window hole 41a. That is, the second window hole 41b is formed at a position corresponding to the second window portion 21b of the first and second plates 211 and 212. The second window hole 41b is formed in a rectangular shape, and the radial direction position (the central position of the radial direction width of the hole) of the second window hole 41b is located on the inner side in the radial direction compared to the central position in the radial direction of the first window hole 41a. The second window hole 41b has pressing surfaces 41f at both ends in the circumferential direction, and the distance between the two pressing surfaces 41f is set to be shorter than the distance (length in the circumferential direction) between the two pressing surfaces 21d of the second window portion 21b of the input side plate 21.

[0044] The first stopper hole 42a is an elongated hole extending in an arc shape on the R1 side of the first window hole 41a. The first stopper hole 42a is formed separately from the first window hole 41a. The end portion on the side of the first window hole 41a from which the first stopper hole 42a is separated extends to the outer side in the radial direction of the second window hole 41b. In addition, the end portion of the first window hole 41a close to the first stopper hole 42a extends toward the convex portion 41d of the first window hole 41a.

[0045] 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") of the circumferential direction of the first window hole 41a. The end portion on the R1 side of the second stopper hole 42b communicates with the central portion in the radial direction of the first window hole 41a.

[0046] In addition, in the first and second stopper holes 42a and 42b, protruding portions 42c bulging toward the outer side in the radial direction are formed near the end portions on the R2 side. The protruding portions 42c are formed at positions corresponding to the fixing hole 21e of the rivet 25 of the input side plate 21. The rivet 25 can be riveted by a tool through the protruding portions 42c and the assembly hole 21f.

[0047] The stop pin 24 axially extends through the first and second stop holes 42a, 42b. This allows the input side plate 21 and the hub flange 22 to rotate relative to each other within the range within which the stop pin 24 can move within the stop holes 42a, 42b. In other words, the stop pin 24 and the first and second stop holes 42a, 42b form a stop mechanism 45. The abutment between the stop pin 24 and the end surfaces of the stop holes 42a, 42b prevents relative rotation between the input side plate 21 and the hub flange 22.

[0048] <Damper Section 23>

[0049] like Figure 1 and Figure 3 As shown, 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-damper 50 , and a hysteresis generating mechanism 60 .

[0050] 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.

[0051] - Coil spring 47 and resin member 48 -

[0052] The coil spring 47 is housed in the first window hole 41a of the flange 40, and the resin member 48 is housed in the second window hole 41b of the flange 40. The coil spring 47 and the resin member 48 are supported axially and radially by the first and second window portions 21a, 21b of the first and second plates 211, 212, respectively.

[0053] The resin member 48 is disposed with a gap in the circumferential direction relative to the second window portion 21b of the input side plate 21. Meanwhile, the resin member 48 is disposed with no gap in the circumferential direction relative to the second window hole 41b of the flange 40.

[0054] A first spring seat 71 is provided on the end surface on the R1 side of the coil spring 47 . A second spring seat 72 is provided on the end surface on the R2 side of the coil spring 47 .

[0055] Here, the coil spring 47 and a portion of the rivet 25 are arranged so as to overlap with the mounting diameter P of the stopper pin 24 .

[0056] - Pre-shock absorber 50 -

[0057] The pair of pre-shock absorbers 50 is a mechanism for elastically connecting the hub 30 and the flange 40 in the rotational direction. Figure 3As shown, a pair of pre-dampers 50 are arranged in opposition to each other with the rotational axis O interposed therebetween. Each pre-damper 50 is arranged on the radially inner side of the second window hole 41b in a manner interposed between a pair of the first window holes 41a. Each pre-damper 50 has a pair of coil springs 51. Each coil spring 51 is arranged between a pair of the protruding portions 30b of the hub 30 and the end surface of the opening 44 of the flange 40.

[0058] - Hysteresis generating mechanism 60 -

[0059] The hysteresis generating mechanism 60 is arranged between the first and second plates 211 and 212 and the axial direction of the hub flange 22. The hysteresis generating mechanism 60 is composed of a bushing and 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 in opposition 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 in opposition to each other.

[0060] [Assembly of the torque limiter unit 10 and the damper unit 20]

[0061] 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 riveted and fixed by the rivet 25.

[0062] At this time, since the assembly hole 21f is 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 rivet 25 and the riveting tool can pass through these holes and the like, and the first plate 211 and the friction plate 13 can be riveted and fixed by the rivet 25.

[0063] Here, the rivet 25 for fixing the torque limiter unit 10 and the damper unit 20 is assembled using the stopper holes 42a and 42b. Thereby, the inner peripheral portion of the torque limiter unit 10 and the outer peripheral portion of the damper unit 20 can be overlapped, and miniaturization of the device can be achieved.

[0064] [Operation]

[0065] 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, the torque is input to the input side plate 21 in 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. Furthermore, the power is transmitted from the hub flange 22 to the output side motor, generator, transmission, and the like.

[0066] Further, for example, at the time of engine start, since the inertia amount of the output side is large, there is a case where excessive torque is 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.

[0067] [Other Embodiments]

[0068] The present application is not limited to the embodiments described above, and various changes or modifications can be made without departing from the spirit of the present application.

[0069] (a) The specific configuration of the damper unit 20 and the torque limiter unit 10 is not limited to the embodiments described above.

[0070] (b) In the embodiments described above, the stop mechanism 45 is configured by the stopper holes 42a, 42b and the stopper pin 24, but instead of the stopper holes 42a, 42b, it can also be configured by a notch extending in the circumferential direction and open in the radial direction.

[0071] (b) In the embodiments described above, a part of the rivet 25 is disposed at a position overlapping the mounting diameter of the stopper pin 24, but the disposition of the rivet 25 is not limited thereto.

[0072] Explanation of Reference Numerals

[0073] 15... conical spring (biasing member); 21... input side plate (first rotating body); 22... hub flange (second rotating body); 24... stopper pin; 25... rivet (fixing member); 30... hub; 40... flange; 41a... first window hole; 42a... first stopper hole (notch); 42b... second stopper hole (notch); 42c... protruding portion; 45... stop mechanism; 47... coil spring (elastic member).

Claims

1. A damper device with a torque limiter, which is provided between a component on a power source side and a component on an output side, characterized by comprising: a damper unit coupled to the component on the output side; and a torque limiter unit that limits a torque transmitted between the component on the power source side and the damper unit, wherein the damper unit has: a first rotary body in a circular plate shape; a second rotary body having a flange opposite to the first rotary body in an axial direction, rotatable opposite to the first rotary body, and coupled to the component on the output side; a stopper mechanism having a notch formed in the flange and extending in a circular arc shape, and a stopper pin fixed to the first rotary body and penetrating the notch in the axial direction, the stopper mechanism limiting a relative rotation angle of the first rotary body and the second rotary body within a prescribed angle range; and an elastic member elastically coupling the first rotary body and the second rotary body in a rotation direction, wherein the torque limiter unit has a ring-shaped friction plate, an inner peripheral portion of the ring-shaped friction plate is fixed to an outer peripheral portion of either one of the first rotary body and the second rotary body by a fixing member, and the fixing member is assembled while penetrating the notch of the flange, and wherein the fixing member and the elastic member are disposed so that a part of each of the fixing member and the elastic member overlaps with a mounting diameter of the stopper pin.

2. A damper device with a torque limiter, which is provided between a component on a power source side and a component on an output side, characterized by comprising: a damper unit coupled to the component on the output side; and a torque limiter unit that limits a torque transmitted between the component on the power source side and the damper unit, wherein the damper unit has: a first rotary body in a circular plate shape; a second rotary body having a flange opposite to the first rotary body in an axial direction, rotatable opposite to the first rotary body, and coupled to the component on the output side; a stopper mechanism having a notch formed in the flange and extending in a circular arc shape, and a stopper pin fixed to the first rotary body and penetrating the notch in the axial direction, the stopper mechanism limiting a relative rotation angle of the first rotary body and the second rotary body within a prescribed angle range; and an elastic member elastically coupling the first rotary body and the second rotary body in a rotation direction, wherein the torque limiter unit has a ring-shaped friction plate, an inner peripheral portion of the ring-shaped friction plate is fixed to an outer peripheral portion of either one of the first rotary body and the second rotary body by a fixing member, and the fixing member is assembled while penetrating the notch of the flange, and wherein the notch of the stopper mechanism is a long hole in a circular arc shape, the long hole has a protruding portion protruding to an outer side in a radial direction in a part of a circumferential direction, and the fixing member penetrates the long hole including the protruding portion.

3. The damper device with a torque limiter according to claim 1 or 2, characterized in that ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first rotating body has a first plate and a second plate in a circular plate shape, which are arranged so as to sandwich a flange in the axial direction, and the first plate and the second plate are fixed by the stopper pin so as not to move in the axial direction and not to rotate relatively.

4. The damper device with a torque limiter according to claim 3, wherein the friction plate is fixed to the first plate, the second plate has an assembly hole through which the fixing member can pass.

5. The damper device with a torque limiter according to claim 1 or 2, wherein the torque limiter has: a fixed plate fixed to a member on the power source side; a pressure plate for pressing the friction plate toward the fixed plate; and a force applying member for pressing the friction plate toward the fixed plate via the pressure plate.

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