JP6388565B2 - Torque limiter device - Google Patents

Description

  The present invention relates to a torque limiter device that can be used in, for example, a hybrid drive device mounted on a hybrid vehicle and can reduce costs.

When transmitting power from a power source to a drive system in a vehicle such as an automobile, when a torque exceeding a preset limit torque is transmitted to prevent the drive system from being damaged by excessive torque. A torque limiter device that restricts (relaxes) transmission of the excessive torque by causing slipping may be provided.
In particular, in recent years, development of hybrid vehicles taking environmental protection into account has been actively promoted. In this hybrid vehicle, the engine and the electric motor are used as drive sources, respectively. Excessive torque may be generated due to fluctuations in travel load or engine load at the start, and torque fluctuations are more likely to occur than in a drive device having only one drive source. For this reason, a torque limiter device that suppresses torque fluctuation between the engine and the electric motor is important.

  In general, in a torque limiter device, a friction material is used as a function of transmitting torque of a power source and shutting off a certain torque or less when an excessive torque is input. In addition to transmitting the torque of the source, slipping occurs between the friction material and the mating member when an excessive torque is input, thereby blocking the torque below a certain level.

  Here, in the conventional torque limiter device, a method of using a fixed friction material is employed. For example, Patent Document 1 discloses a method of fixing a friction plate by drilling, a disc spring or the like, and Patent Document 2 discloses a plurality of arc-shaped holes in the circumferential direction of the outer peripheral portion of the unit (clutch plate). A torque limiter device is disclosed in which a friction material formed in a circular arc shape is press-fitted into each of the circular arc holes and is mounted.

Japanese Utility Model Publication No. 5-27281 JP 2011-27122 A

  In such a conventional method using a fixed friction material, a process for fixing the friction material is required, which increases the manufacturing cost. In addition, since the friction material is fixed, one surface on the fixed side of the friction material does not function as a sliding surface (friction surface) but only one sliding surface (friction surface), and this one surface functions due to wear or the like. When it disappears, it becomes the life. Therefore, in order to extend the life, the material of the friction material itself must be changed.

  Accordingly, an object of the present invention is to provide a torque limiter device that can ensure a long life without changing the material of the friction material and can reduce the cost.

  The torque limiter device according to claim 1 is attached to the input-side first rotation plate connected to the rotation main shaft to which torque is input, and is relatively movable in the axial direction of the rotation main shaft. And an input-side second rotation plate that can rotate integrally with the input-side first rotation plate, and is disposed between the input-side first rotation plate and the input-side second rotation plate, and the rotation main shaft. An output plate connected to a rotation follower provided on the same axis so as to be relatively movable, and arranged in contact with the input side first rotation plate and the output plate, and the input side first rotation plate and the output plate An annular first friction material having sliding surfaces slidable on both surfaces on the front and back sides, the input side second rotating plate and the output plate are disposed in contact with each other, and the input side second rotating plate And an annular second friction material having sliding surfaces slidable with respect to both surfaces of the output plate and a surface opposite to the second friction material side of the input side second rotating plate And an urging member that urges the input-side second rotating plate toward the input-side first rotating plate in the axial direction, and is connected to the input-side first rotating plate, and the urging member is A supporting plate is provided.

Here, the input-side first rotating plate is connected to the rotating main shaft to which torque is input and rotates synchronously with the rotating main shaft, and the first friction material becomes a mating member that frictionally engages or slides. is there.
The input-side second rotating plate is rotatably attached integrally with the input-side first rotating plate and is relatively movable in the axial direction of the rotating main shaft, and the second friction material is frictionally engaged or slid. It becomes a mating member. Moreover, the biasing force (pressing force) by the biasing member is directly received.

  The output plate is disposed between the input-side first rotating plate and the input-side second rotating plate, and serves as a counterpart member with which the first friction material and the second friction material are frictionally engaged or slid. The torque of the rotating main shaft is transmitted to a rotating slave shaft provided on the same axis so as to be relatively movable.

The first friction material is relatively rotatable in contact with the input-side first rotation plate and the output plate in order to frictionally engage or slide with respect to the first rotation plate and the output plate (relative to the circumferential direction). And is held between the input side first rotating plate and the output plate by the urging force of the urging member, and both surfaces of the first rotating plate and the output plate are held. The sliding surfaces are slidable with respect to both sides.
Similarly to the first friction material, the second friction material is in contact with the input-side second rotation plate and the output plate for frictional engagement or sliding with respect to the second rotation plate and the output plate. Relative rotation is possible (relative movement in the circumferential direction), and the second rotation plate is held by the input side second rotation plate and the output plate by the biasing force of the biasing member. In addition, both the front and back surfaces have sliding surfaces that can slide on both surfaces of the output plate.

The biasing member biases the output plate connected to the input-side second rotation plate and the rotation driven shaft toward the input-side first rotation plate in the axial direction of the rotation main shaft. The sliding surface of the second friction material arranged in contact between the two-rotation plate and the output plate is pressed against the input-side second rotation plate and the output plate, and is in contact between the input-side first rotation plate and the output plate. der which is pressed against the input side first rotary plate and output plate a sliding surface of the first friction member disposed Te Ru.

According to the torque limiter device of the first aspect of the present invention, the input-side second rotating plate can rotate integrally with the input-side first rotating plate connected to the rotating main shaft, and the relative movement in the axial direction of the rotating main shaft is possible. In addition, the output plate is provided between the input side first rotating plate and the input side second rotating plate so as to be relatively movable coaxially with the rotation main shaft, and is further supported by the input side second rotating plate. An urging member supported by the plate is in pressure contact.
For this reason, the input side first rotation plate is in a state in which the first friction material arranged in contact with the input side first rotation plate and the output plate can slide on both sides with respect to the input side first rotation plate and the output plate. And the second friction material disposed in contact with the input side second rotating plate and the output plate are slidable on both surfaces of the input side second rotating plate and the output plate. It is sandwiched between the input side second rotating plate and the output plate.

  Therefore, when the torque of the rotating spindle is within a predetermined range, the sliding surfaces of both surfaces of the first friction material with respect to the input side first rotating plate and the output plate are frictionally engaged with the input side first rotating plate and the output plate. At the same time, the sliding surfaces of both surfaces of the second friction material with respect to the input-side second rotary plate and the output plate are frictionally engaged. For this reason, the rotation of the rotation main shaft is transmitted to the output plate via the input side first rotation plate, the input side second rotation plate, the first friction material, and the second friction material. Then, the rotary slave shaft connected to the output plate rotates in synchronization with the rotation main shaft. That is, the torque of the rotating main shaft is transmitted to the rotating slave shaft by the friction force (friction resistance force) of the first friction material and the second friction material.

  On the other hand, when the torque of the rotating spindle exceeds a predetermined value (limit torque value), the sliding surface of the first friction material slides with respect to the input side first rotating plate and the output plate, and the second friction material. The sliding surface of the material slides with respect to the input side second rotary plate and the output plate. As a result, torque transmission from the rotating main shaft to the rotating slave shaft is interrupted and alleviated, and excessive torque fluctuations are prevented from being transmitted.

Thus, in the torque limiter device of the present invention, the first friction material is against both surfaces of the input-side first rotation plate and the output plate, and the second friction material is the input-side second rotation plate. Both sides of the output plate have sliding surfaces that can slide on both sides.
Therefore, in the conventional friction material with one surface fixed, only one surface slides, whereas according to the torque limiter device of the present invention, the sliding surfaces of the friction material acting as a torque limiter are both front and back surfaces. For this reason, the sliding surface is doubled, and even when one surface stops functioning, the remaining one surface exhibits a torque limiter function and can be used for a long time without changing the material of the friction material. In addition, since the sliding load is distributed on both sides by using double-sided sliding, the change over time of the static friction coefficient μs can be mitigated and stable torque control can be performed. . Furthermore, the aggression due to the progress of wear of the first friction material and the second friction material and the friction against the mating member is alleviated, which also ensures a long life.

Further, since the input side second rotating plate and the output plate can be moved in the axial direction, the first friction material is always slid on both sides of the input side first rotating plate and the output plate by the biasing force of the biasing member. The input side second rotating plate can be held by the input side first rotating plate and the output plate in a movable state and the second friction material can slide on both surfaces of the input side second rotating plate and the output plate. and because it can hold the output plate, the first friction member and the second friction member may not be fixed in a specific unit, Ru cost can der.

FIG. 1 is a cross-sectional view for explaining the configuration of a torque limiter device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view for explaining the configuration of the torque limiter device according to the embodiment of the present invention. FIG. 3 is a cross-sectional view for explaining the configuration of a torque limiter device according to a modification corresponding to FIG. 1 of the embodiment of the present invention. FIG. 4 is an exploded perspective view for explaining a configuration of a torque limiter device according to a modification corresponding to FIG. 1 of the embodiment of the present invention. 5A to 5C are partial cross-sectional views for explaining another three types of configurations of the torque limiter device according to the modified example corresponding to FIGS. 1 and 3 of the embodiment of the present invention. .

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.
As shown in FIGS. 1 and 2, the torque limiter device 1 according to the embodiment of the present invention is provided between a rotary main shaft 10 that is a coaxial torque output side and a rotary slave shaft 20 that is a torque receiving side. An input-side first rotating plate 30 connected to the rotating spindle 10 side and rotatable around the axis; an input-side second rotating plate 40 connected to the input-side first rotating plate 30; An output plate 50 disposed between the first rotation plate 30 on the side and the second rotation plate 40 on the input side, connected to the rotation driven shaft 20, and a ring disposed in contact with the first rotation plate 30 on the input side and the output plate 50. The first friction material 60A, the annular second friction material 60B disposed in contact with the output plate 50 and the input side second rotation plate 40, and the second friction material 60B side of the input side second rotation plate 40 are opposite to each other. Side The disc spring 70 as a biasing member is disposed in contact, and a support plate 80. giving a biasing force to support the disc spring 70 is connected to the input side rotation plate 30.

1 and 2, the input-side first rotation plate 30 connected to the rotation main shaft 10 is a flat disk portion 31 having a central through hole 31a into which the tip convex portion of the rotation main shaft 10 is inserted, It consists of a mass portion 32 having a thickness larger than that of the disc portion 31 extending on the outer periphery of the disc portion 31. Here, the one end surface of the disc part 31 and the mass part 32 exists in the same plane, and the other end surface of the disc part 31 and the mass part 32 has a level | step difference. Therefore, the input-side first rotation plate 30 is an annular plate having a substantially U-shaped cross section.
In the vicinity of the periphery of the central through hole 31a of the disc portion 31, bolt insertion holes 31b penetrating front and back in the axial direction (thickness direction) are arranged at equal intervals in a concentric circumferential direction centering on the central through hole 31a. A plurality are formed.

  In the present embodiment, the tip convex portion of the rotation main shaft 10 is inserted into the central through hole 31a, the bolt 11 for connecting to the rotation main shaft 10 is inserted into the bolt insertion hole 31b, and screwed into the screw hole of the rotation main shaft 10. By doing so, the input-side first rotary plate 30 can be coaxially connected and fixed to the end face of the rotary main shaft 10 by the plurality of bolts 11.

  In addition, in the vicinity of the mass portion 32 on the outer periphery of the disc portion 31, the input side second rotating plate penetrates the front and back in the axial direction (thickness direction) in a concentric circumferential direction centering on the central through hole 31 a. A plurality of slit-shaped through holes 31c through which the claw portions 41 formed on the outer peripheral portion of 40 are inserted are formed at equal intervals. Further, a guide protrusion 90A is provided between the bolt insertion hole 31b and the slit-shaped through hole 31c on the surface of the disc portion 31 opposite to the rotation main shaft 10. The guide protrusion 90A is for positioning the first friction material 60A on the input-side first rotation plate 30. In FIGS. 1 and 2, the first friction material 60A is assembled when the first friction material 60A is assembled. It is set as the position where the inner peripheral end of 60A contacts. The protrusion height of the guide protrusion 90A is set to a thickness that does not contact the double-side friction allowance of the first friction material 60A and the output plate 50. In this manner, by providing the guide protrusion 90A on the input-side first rotation plate 30, the first friction material 60A can slide at a predetermined position.

  Further, on the surface 32b having a step with the disk portion 31 of the mass portion 32 (hereinafter referred to as a step surface 32b), the support plate 80 is fixed in a concentric circumferential direction centering on the central through hole 31a. A plurality of bolt mounting holes 32a in which the bolts 84 are mounted are provided at equal intervals.

  The input-side second rotation plate 40 connected to the input-side first rotation plate 30 is a metal annular member accommodated in the input-side first rotation plate 30, and a center hole 41 a is formed at the center, and the center A flat portion on which the first friction material 60A is disposed is provided around the hole 41a, and the outer peripheral portion thereof corresponds to the slit-like through hole 31c of the input-side first rotation plate 30, and the input-side first rotation plate A plurality of claw portions 41 extending in the axial direction toward the 30 side are provided in the circumferential direction at equal intervals.

In the present embodiment, the protruding length in the axial direction of the claw portion 41 of the input side second rotating plate 40 is the first friction material 60A, the second friction material 60B, the output plate 50, and the input side first rotating plate 30. The slit-like through hole 31c is longer than the total axial length (thickness), and the claw portion 41 of the input-side second rotary plate 40 is connected to the slit-like through-hole of the input-side first rotary plate 30. By passing through 31c, the input-side second rotating plate 40 can rotate integrally with the input-side first rotating plate 30, and can move relative to the input-side first rotating plate 30 in the axial direction of the rotary spindle 10. It is designed to be held as possible.
When the present invention is carried out, the input-side second rotary plate 40 is attached so as to be relatively movable in the axial direction of the rotary spindle 10 without rattling on the input-side first rotary plate 30 and so as to be integrally rotatable. If possible, the engagement form is not particularly limited to the above.

Further, the input-side second rotating plate 40 of the present embodiment has a guide protrusion 90B that protrudes in the axial direction toward the input-side first rotating plate 30 on the inner peripheral portion thereof.
The guide protrusion 90B is for positioning the second friction material 60B on the input-side second rotating plate 40. In FIGS. 1 and 2, the second friction material 60B is assembled when the second friction material 60B is assembled. The inner peripheral end portion of 60B is in a contact position. Similar to the guide protrusion 90A, the protrusion height of the guide protrusion 90B is a thickness that does not contact the double-side friction allowance of the second friction material 60B and the output plate 50. Thus, by providing the guide protrusion 90B on the input-side second rotation plate 40, the second friction material 60B can slide at a predetermined position.

  The output plate 50 disposed between the input side first rotating plate 30 and the input side second rotating plate 40 is an annular flat plate, and the inner peripheral side thereof is provided coaxially with the rotary main shaft 10 so as to be relatively movable. Connected to the rotating slave shaft 20.

  Both the first friction material 60A and the second friction material 60B are members having an annular flat plate shape. When a torque exceeding a predetermined value is applied, the first friction material 60A has the input side first rotary plate 30 side and the output plate 50 side. The second friction member 60B has sliding surfaces that slide on both the input side second rotary plate 40 side and the output plate 50 side. That is, both surfaces of the first friction material 60A and the second friction material 60B are sliding surfaces having a specific static friction coefficient μs.

  The disc spring 70 as an urging member disposed in contact with the surface of the input side second rotating plate 40 opposite to the friction material 60B side is a hollow truncated cone spring member.

The support plate 80 is a cylindrical member having a flange. A cylindrical portion 82 extends from the flange portion 83 of the flange, a ring portion 81 is provided at the distal end of the cylindrical portion 82, and the distal end portion is closed in a donut shape. The flange portion 83 is provided with a bolt insertion hole 83a through which a bolt 84 screwed into the bolt mounting hole 32a of the input side first rotation plate 30 is inserted. The bolt 84 is inserted into the bolt insertion hole 83a and the input side first By screwing into the bolt mounting hole 32 a of the one rotation plate 30, the support plate 80 is fixed at the step surface 32 b of the mass portion 32 of the input side first rotation plate 30, and rotates together with the input side first rotation plate 30. It is possible.
Further, as shown in FIG. 1, a disc spring 70 interposed between the input side second rotating plate 40 and the input side second rotating plate 40 is accommodated in the cylindrical portion 82 and abuts on the ring portion 81. The height (the length in the axial direction) of the cylindrical portion 82 that accommodates the disc spring 70 is set to a value that can apply a predetermined urging force to the disc spring 70. Accordingly, the disc spring 70 is supported and assembled in the cylindrical portion 82 in a state where the disc spring 70 is bent in the direction (axial direction) in which the cone height is lowered by the ring portion 81, and a predetermined predetermined deflection is applied. Installed in a preloaded state.

The disc spring 70 supported by the support plate 80 in this manner biases the input side second rotary plate 40 away from the support plate 80, that is, toward the input side first plate 30.
The urging force, that is, the disc spring load (pressing force) generated according to the amount of deflection of the disc spring 70 is an input that can be moved relative to the input first rotary plate 30 in the axial direction of the rotary spindle 10. By being stably transmitted by the output plate 50 that is relatively movable in the axial direction of the side second rotary plate 40 and the rotary driven shaft 20, the second side rotary plate 40 and the output plate 50 are arranged in contact with each other. Two friction members 60B are held in pressure contact with the input-side second rotary plate 40 and the output plate 50 so as to be relatively rotatable with respect to both, and are disposed in contact with the output plate 50 and the input-side first rotary plate 30. 60 A of 1st friction materials are hold | maintained at the output plate 50 and the input side 1st rotation plate 30 so that relative rotation with respect to both is possible. That is, a clamping force is applied by the disc spring 70, the first friction material 60A is clamped and held by the input-side first rotation plate 30 and the output plate 50, and the second friction material 60B is input-side. The second rotating plate 40 and the output plate 50 are sandwiched and held so as to be relatively rotatable.

  When the present invention is carried out, the mounting form of the support plate 80 to the input-side first rotation plate 30 is not limited to fixing with the bolts 84, but is supported with respect to the input-side first rotation plate 30. As long as the plate 80 can be provided integrally, a rivet or the like may be used, or an engagement structure with irregularities or the like may be employed.

  With such a configuration, in the torque limiter device 1 according to the present embodiment, the input-side second rotary plate 40 can be moved relative to the input-side first rotary plate 30 in the axial direction and can be integrally rotated. The output plate 50 connected to the rotary driven shaft 20 is provided so as to be relatively movable in the axial direction, and the first friction material 60A and the second friction material 60B have sliding surfaces on both sides. Therefore, the first friction is caused by the biasing force of the disc spring 70 which is supported by the support plate 80 fixed to the input-side first rotating plate 30 and elastically deformed in advance in the axial direction so as to be biased in the axial direction. The material 60 </ b> A is held in a sandwiched state so as to be relatively rotatable with respect to the input-side second rotating plate 40 and the output plate 50, and the second friction material 60 </ b> B is held between the input-side second rotating plate 40 and the output plate 50. Therefore, even when the first friction material 60A and the second friction material 60B are worn, the input-side second rotation plate 40 and the output plate 50 are held so as to be relatively movable in the axial direction, and the biasing force by the disc spring 70 is retained. Thus, following the wear of the friction materials 60A and 60B, the input-side second rotary plate 40 and the output plate 50 move in a direction approaching the input-side first rotary plate 30, and the biasing force of the disc spring 70 is stabilized. By being transmitted, the pressure contact state between the first friction material 60A and the second friction material 60B is always stably maintained, and stable torque transmission and torque control are maintained.

The first friction material 60A and the second friction material 60B are slidable on both sides without being fixed to any of the input side first rotation plate 30, the input side second rotation plate 40, and the output plate 50. It is a surface. Therefore, even when one of the two surfaces of the first friction material 60A and the second friction material 60B cannot maintain a predetermined friction characteristic due to wear or the like and the limit function does not work, the other surface maintains a predetermined friction characteristic. Thus, the limit function is exhibited, and the reliability with respect to torque control, wear and the like is improved as compared with the conventional one having a single sliding surface.
In the present embodiment, positioning is performed by the guide protrusion 90A provided on the input-side first rotation plate 30 and the guide protrusion 90B provided on the input-side second rotation plate 40, and the first friction material 60A and the second friction material are aligned. By restricting the inner circumference of the material 60B, the first friction material 60A and the second friction material 60B are held so as to slide at predetermined positions. The positioning of 60A and the second friction material 60B is not limited to this. For example, the outer periphery of the friction materials 60A and 60B may be regulated by a guide protrusion, and the guide protrusion is attached to the output plate 50. It is also possible to provide it.

  Thus, according to the torque limiter device 1 of the present embodiment, the first friction material 60A and the second friction material 60B are replaced with the input-side second rotary plate 40, the output plate 50, and the input that are units of the torque limiter device 1. The second friction member 60B is always moved to the input side first by the biasing force of the disc spring 70 and the axial movement of the input side second rotary plate 40 and the output plate 50 without being fixed to the side first rotary plate 30 by specific means. The second friction plate 60 and the output plate 50 are pressed against each other with a desired load so that the first friction member 60A can move relative to the input-side first rotation plate 30 and the output plate 50 in the circumferential direction. Therefore, the first friction material 60A and the second friction material 60B are frictionally engaged or slid according to the magnitude of the torque received by the first friction material 60A and the second friction material 60B. When the torque received by the first friction material 60A and the second friction material 60B is larger than the frictional force when the both surfaces of 60B are frictionally engaged, both surfaces of the first friction material 60A and the second friction material 60B become sliding surfaces. Slides and functions as a torque limiter. That is, the first friction material 60A is frictionally engaged or slid with respect to the input side first rotation plate 30 and the output plate 50 by the torque of the rotating main shaft 10, and the second friction material 60B is input side first. The two-rotation plate 40 and the output plate 50 are frictionally engaged or slid.

  Therefore, when the torque of the rotation main shaft 10 is within a predetermined value, the first rotation plate 30 connected to the rotation main shaft 10 and the second input rotation plate 40 held so as to rotate integrally therewith The first friction material 60A is frictionally engaged with the input side first rotation plate 30 and the output plate 50, and the second friction material 60B is frictionally engaged with the input side second rotation plate 40 and the output plate 50, whereby the input side The output plate 50 rotates in synchronization with the rotary spindle 10 via the first rotating plate 30, the input-side second rotating plate 40, the first friction material 60A, and the second friction material 60B. That is, the torque of the rotation main shaft 10 causes the friction force between the input side first rotation plate 30 and output plate 50 and the first friction material 60A, and the input side second rotation plate 40 and output plate 50 and the second friction material 60B. Is transmitted to the output plate 50. Then, the torque of the rotary main shaft 10 is transmitted from the output plate 50 to the rotary slave shaft 20.

  On the other hand, when the torque fluctuation of the rotating spindle 10 exceeds a predetermined value (limit torque value), as described above, the first friction material 60A and the second friction material 60B are the input side second rotation plate 40, the output plate. 50, the first friction material 60A is slidable with respect to the input side first rotation plate 30 and the output plate 50 as sliding surfaces. Further, both surfaces of the second friction material 60 </ b> B slide relative to the input-side first rotating plate 30 and the output plate 50 as sliding surfaces. As a result, torque transmission from the rotary main shaft 10 to the rotary slave shaft 20 is limited by interruption / relaxation, and excessive torque is prevented from being transmitted.

At this time, since both the first friction material 60A and the second friction material 60B are sliding surfaces, even if one surface of the first friction material 60B changes in friction characteristics due to the worn state and the normal function is deteriorated, the remaining one surface is a normal function. To improve reliability. Further, the first friction material 60A and the second friction material 60B do not need to be fixed, so that they can be easily mounted, and an extra processing step such as a fixing member such as an adhesive or a rivet or a processing for fixing the friction material. The fixing work is not required and the cost can be reduced. Furthermore, since the first friction material 60A and the second friction material 60B do not need to be fixed, required specifications such as strength required for fixing are relaxed, and thus the degree of freedom in design becomes high. In addition, both surfaces of the first friction material 60A and the second friction material 60B slide with respect to mating members such as the output plate 50, the input side first rotation plate 30, and the input side second rotation plate 40 as sliding surfaces. Compared to the conventional case in which either one surface is fixed and only one surface on the opposite side is the sliding surface, the true contact point with the mating member is increased (when the radial size of the friction material is the same). Thus, since the frictional sliding load is distributed on both surfaces, the change with time of the friction coefficient μs is alleviated, the progress of wear is suppressed, and the life of the first friction material 60A and the second friction material 60B can be extended. Further, the aggressiveness of the first friction material 60A and the second friction material 60B due to the friction with the mating member is reduced, and the life of the mating member can be extended.
On the other hand, since the progress of wear of the friction materials 60A and 60B can be suppressed, the thickness of the first friction material 60A and the second friction material 60B can be reduced while ensuring a life equal to or longer than the conventional one, and the entire apparatus It is possible to shorten the dimension in the axial direction.
Therefore, according to the torque limiter device 1 of the present embodiment, the degree of freedom for vehicle mounting is increased.

  Furthermore, since the thickness of the friction materials 60A and 60B can be reduced without requiring fixing with a heavy rivet, it is possible to improve torque operability and reduce the weight of the torque limiter device. Further, the material cost can be reduced by reducing the thickness of the friction materials 60A and 60B.

Next, a torque limiter device according to a modification of the embodiment of the present invention will be described with reference to FIGS.
Note that the same symbols and the same reference numerals in the embodiment and the modification mean the same or corresponding functional parts, and are common to each other, and thus the detailed description thereof is omitted here. .

  In the torque limiter device 100 according to the modified example, the connection plate 12 is connected to the rotation spindle 10, and the support plate 180 and the input-side first rotation plate 130 are provided on the connection plate 12 so as to be integrally rotatable. That is, the support plate 180 is connected to the connection plate 12, the input-side first rotation plate 130 is further connected, and the support plate 180 and the input-side first rotation plate 130 are fixed to the connection plate 12 by the bolts 84. So that they can rotate together.

  More specifically, the connection plate 12 includes a flat plate disc portion 13 having a central through hole 12a into which the tip convex portion of the rotation main shaft 10 is inserted at the center, and a peripheral portion of the disc portion 13 on the periphery of the disc portion 13. A disk having a substantially U-shaped cross section comprising a mass portion 14 having a thickness formed thicker in the axial direction of the rotary main shaft 10 toward the opposite side of the rotary main shaft 10 (on the rotation driven shaft 20 side) than the thickness. An annular member.

  Bolt insertion holes 12b penetrating the front and back in the axial direction are arranged at equal intervals around the central through hole 12a in the disc portion 13 of the connection plate 12 in a concentric circumferential direction centering on the central through hole 12a. A plurality are formed.

  In the modified example, the tip convex portion of the rotation main shaft 10 is inserted into the central through hole 12 a, and a plurality of bolts 11 are inserted into the bolt insertion holes 12 b to be coupled to the rotation main shaft 10 and screwed into the screw holes of the rotation main shaft 10. By doing so, the connection plate 12 can be coaxially coupled and fixed to the rotary main shaft 10.

  In addition, the mass portion 14 extended to the periphery of the disc portion 13 has an end surface on the side of the rotary driven shaft 20 in the thickness direction (axial direction), that is, a step surface 14b having a step with the disc portion 13 at the center. A plurality of bolt mounting holes 12c for mounting bolts 84 to which the support plate 180 and the input-side first rotating plate 130 are joined and fixed in a concentric circumferential direction with the through hole 12a as the center are mounted at equal intervals. Is provided.

  3 and 4, the support plate 180 connected and fixed to the connection plate 12 includes a ring portion 181 that abuts on a disc spring 70 as an urging member, a cylinder portion 182 that extends in the axial direction from the ring portion 181, and a cylinder The flange portion 183 includes a flange portion 183 that extends radially outward from the tip of the portion 182, and a bolt insertion hole 183 a that penetrates the front and back in the axial direction extends in the circumferential direction corresponding to the bolt mounting hole 12 c of the connection plate 12. A plurality are formed at equal intervals.

  The input side second rotating plate 40 is disposed in contact with the disc spring 70 disposed in contact with the ring portion 181 of the support plate 180. That is, the disc spring 70 is in contact with the ring portion 81 of the support plate 180 and the input-side second rotating plate 40 in the same manner as in the above-described embodiment, and is in a state where a predetermined deflection is applied (preload state). ) Between the support plate 180 and the input-side second rotary plate 40.

  The input-side second rotating plate 40 with which the disc spring 70 contacts is formed with a central hole 41a at the center and a claw portion 41 extending toward the input-side first rotating plate 30 on the outer periphery, as in the above embodiment. A plurality of projections are provided in the axial direction at regular intervals. Also in the modified example, the input-side second rotary plate 40 is inserted into the input-side second rotary plate 40 by inserting the claw portion 41 of the input-side second rotary plate 40 into the slit-like through hole 131c of the input-side first rotary plate 130. The first rotary plate 130 can be rotated integrally with the input side first rotary plate 130 so as to be relatively movable in the axial direction of the rotary spindle 10. In the modification, the input-side second rotary plate 40 has an outer diameter that is smaller than the outer diameter of the cylindrical portion 182 of the support plate 180 and is disposed in the cylindrical portion 182 of the support plate 180. In addition, a guide protrusion 90 </ b> B is provided on the inner peripheral portion of the input-side second rotary plate 40 so as to protrude in the axial direction toward the input-side first rotary plate 130. 3 and 4, the guide protrusion 90 </ b> B is a position where the inner peripheral end of the second friction material 60 </ b> B contacts when the second friction material 60 </ b> B is assembled.

The input side first rotary plate 130 to which the input side second rotary plate 40 is connected is a flat plate annular member having a center hole 131a in the center, and is centered corresponding to the claw portion 41 of the input side second rotary plate 40. A plurality of slit-shaped through holes 131c are formed at equal intervals in a concentric circumferential direction centering on the hole 131a.
Further, a bolt insertion hole through which a bolt 84 for fixing to the connection plate 12 together with the support plate 180 is inserted in the outer circumferential portion of the input-side first rotation plate 130 in a concentric circumferential direction centering on the center hole 131a. A plurality of 131b are provided at equal intervals.

  Further, a guide protrusion 90 </ b> A extending in the axial direction on the input side second rotary plate 40 side is provided on the inner peripheral portion of the input side first rotary plate 130, that is, the peripheral edge portion of the center hole 131 a. It protrudes and faces the guide protrusion 90B. 3 and 4, the guide protrusion 90 </ b> A is a position where the inner peripheral edge of the first friction material 60 </ b> A contacts when the first friction material 60 </ b> A is assembled.

  Further, in the input side first rotating plate 130 according to the modification, the inner peripheral portion thereof, that is, the peripheral portion of the center hole 131a, is formed thick in the axial direction opposite to the input side second rotating plate 40 side. The reinforcing rib portion 131d is provided to increase the rigidity on the inner peripheral side.

  An output plate 50 connected to the rotation driven shaft 20 is disposed between the input-side first rotation plate 130 and the input-side second rotation plate 40, and is further in contact with the input-side first rotation plate 130 and the output plate 50. The flat plate-shaped first friction material 60 </ b> A is disposed, and the flat plate-shaped second friction material 60 </ b> B is disposed in contact with the output plate 50 and the input-side second rotation plate 40. Both the first friction material 60A and the second friction material 60B are not fixed to any of the input side first rotation plate 130, the input side second rotation plate 40, and the output plate 50, and the input side first rotation plate 130, The input side second rotation plate 40 and the output plate 50 can slide in the circumferential direction. Therefore, also in the torque limiter device 100 according to this modification, the first friction material 60A can slide with respect to both surfaces of the input-side first rotation plate 130 and the output plate 50, and the second friction material The material 60 </ b> B can slide on both surfaces of the input-side second rotary plate 40 and the output plate 50.

Here, the configuration of the torque limiter device 100 and the shapes of the constituent members are not limited to the above-described embodiments and modifications.
For example, as shown in FIG. 5A, the input-side first rotation plate 130 includes a flat plate-shaped circular disk part 131, a cylindrical part 132 that extends from the circular disk part 181 in the axial direction on the connection plate 12 side, and a cylindrical part The flange portion 133 extends radially outward from the tip of the connection plate 12 and is fixed to the end face of the connection plate 12 together with the support plate 180 by bolts 84, and is fixed to the connection plate 12 together with the support plate 180 by the bolts 84. It can also be formed in the convex shape extended with respect to the part 133 from this flange part 133 on the opposite side to the connection plate 12 side. In the case of such a shape, as shown in FIG. 3 and FIG. 4, the portion that is fixed to the connection plate 12 by the bolt 84 together with the support plate 180 and the other portion without providing the reinforcing rib 131 d. It is possible to prevent the plate from being lifted by suppressing variations in the axial deflection of the plate. Therefore, variations in the surface pressure distribution of the friction materials 60A and 60B can be suppressed, and the friction torque can be stabilized.

  Further, as shown in FIG. 7B, the connection plate 12 is a flat plate annular member, and the support plate 180 fixed to the connection plate 12 is connected to the flat plate ring-shaped flange portion 181 and the flange portion 181 on the input side. It is also possible to use a disc annular member composed of a mass portion 182 formed thick in the axial direction toward the one-rotation plate 130 side. In such a configuration, the disc spring 70 is supported by the flange portion 181 of the support plate 180, and the mass portion 182 formed on the periphery of the flange portion 181 has a thickness in the axial direction. Can be suppressed.

  Further, as shown in FIG. 7 (c), the support plate 180 includes a flat plate annular portion 183, and a flange portion 184 formed in a step shape from the annular portion 183 toward the input-side first rotation plate 130, A circular ring formed by a mass portion 185 formed thick in the axial direction toward the input-side first rotation plate 130 on the outer periphery of the flange portion 184 has a function as an inertial mass such as a flyhole, and rotates. A structure that directly connects to the main shaft 10 is also possible. In such a configuration, the disc spring 70 is supported by the flange portion 184 of the support plate 180, and the mass portion 185 formed on the periphery of the flange portion 184 has a thickness in the axial direction. And the number of parts can be reduced.

  As described above, the present invention is a friction material (first friction material) arranged in contact with the input side rotation plate (input side first rotation plates 30, 130, input side second rotation plate 40) and the output plate 50. 60A and the second friction material 60B) are arranged at predetermined positions where movement in the radial direction is restricted by the guide protrusions 90A and 90B in a form that is not fixed to the input side rotating plate or the output plate. By adopting such a configuration, the friction materials 60A and 60B can slide in the circumferential direction with respect to both surfaces (two surfaces) of the input side rotation plate and the output plate. Therefore, as compared with the friction material fixed to the conventional input side rotating plate or output plate, the risk of malfunction of the torque limiter function due to the non-sliding is reduced, and the reliability is improved. Further, since both surfaces of the friction materials 60A and 60B become sliding surfaces, the load received by the sliding surfaces can be reduced, so that the life of the friction materials can be extended. Furthermore, since the load of the friction material is reduced, the thickness of the friction material can be reduced, and the means for fixing is not required, so that the torque limiter device can be made compact and the cost can be reduced.

In the torque limiter device of the embodiment and the modification, the first friction material and the second friction material are not fixed to any of the input first plate, the input second plate, and the output plate.

According to this torque limiter device, since the first friction material and the second friction material are not fixed to any of the input first plate, the input second plate, and the output plate, the first friction material and the second friction material The friction material can be easily mounted, and does not require a fixing member such as an adhesive or a rivet, an extra processing step such as a hole processing for fixing the friction material, a fixing operation, and the like, and the cost is low.

Furthermore, the processing cost for fixing rivets or the like is not required, the thickness of the friction material can be reduced, and the material is limited because it is not necessary to require the friction material to have strength for fixing. Absent. Therefore, the degree of freedom in designing the friction material is high.

  In carrying out the present invention, the configuration, shape, material, size, connection relationship, assembling method, and the like of other parts of the torque limiter device are not limited to the above-described embodiments and modifications. . Note that the numerical values given in the embodiments and modifications of the present invention are not all critical values, and certain numerical values indicate preferred values suitable for implementation, so the numerical values are slightly changed. However, it does not deny the implementation.

1,100 Torque limiter device 10 Rotating main shaft 20 Rotating driven shaft 30, 130 Input side first rotating plate 40 Input side second rotating plate 50 Output plate 60A First friction material 60B Second friction material 70 Belleville spring (biasing member)
80,180 support plate

Claims (1)

An input-side first rotating plate connected to a rotating spindle to which torque is input;
An input-side second rotating plate attached to the input-side first rotating plate, relatively movable in the axial direction of the rotation main shaft, and rotatable integrally with the input-side first rotating plate;
An output plate disposed between the input-side first rotating plate and the input-side second rotating plate and connected to a rotating slave shaft provided coaxially with the rotating main shaft so as to be relatively movable;
An annular first having a sliding surface disposed on and in contact with the input side first rotating plate and the output plate and having sliding surfaces on both sides of the input side first rotating plate and the output plate. Friction material,
An annular second plate disposed on and in contact with the input side second rotating plate and the output plate and having sliding surfaces on both sides of the input side second rotating plate and the output plate. Friction material,
Pressing against the surface of the input side second rotating plate opposite to the second friction material side and urging the input side second rotating plate toward the input side first rotating plate in the axial direction A disc spring as a force member;
A support plate connected to the input-side first rotating plate and supporting the disc spring ;
The support plate has a cylindrical portion extending from the flange portion, a ring portion is provided at the distal end of the cylindrical portion, and the distal end is closed in a donut shape,
Further, the disc spring to be interposed between the input side second rotating plate is accommodated in the cylindrical portion and is in contact with the ring portion,
The axial length of the cylindrical portion that accommodates the disc spring is set to a value that can give a predetermined urging force to the disc spring, and is bent in the axial direction to lower the cone height by the ring portion. A torque limiter device, wherein the torque limiter device is supported and assembled in the cylindrical portion in a bent state, and is interposed in a preloaded state to which a predetermined deflection is applied.

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