JP6918426B2 - Torque transmitter - Google Patents

Description

The present invention relates to a torque transmission device provided in a drive unit of an in-vehicle display device or other in-vehicle device, or a drive unit of a household device or the like.

Patent Document 1 describes an invention relating to a torque limiter which is a torque transmission device.
In the torque limiter described in Patent Document 1, a hub keyed to a rotating shaft has a flange at one end and a threaded portion at the other end. Center members such as sprocket wheels are rotatably fitted to the hub, with friction plates sandwiched between the flange and the center member and between the plate and center member that are non-rotating on the hub. .. A disc spring is interposed between the pilot plate fitted to the hub and the plate. Then, the adjusting bolt is screwed to the adjusting nut screwed to the threaded portion formed on the hub, and the tip end portion of the adjusting bolt is abutted against the pilot plate.

This torque limiter makes it possible to adjust the slip torque between the hub and the center member by changing the force for pressurizing the plate by tightening the nut and tightening the adjusting bolt.

Jitsukaisho 59-47127 Gazette

The torque limiter described in Patent Document 1 has a structure for adjusting the pressing force of the plate against the friction plate, in which the disc spring, the pilot plate, and the nut to which the adjusting screw is screwed are spaced apart in the axial direction along the rotation center line. It is arranged with a space. Therefore, the height dimension in the axial direction is large. In addition, as a structure for setting the slip torque, a friction plate is sandwiched between the center member such as a sprocket wheel and the plate, and between the center member and the flange, so that the number of parts is large and the thickness in the axial direction is large. The size is also larger. Therefore, it is difficult to apply it to the drive unit of a small device.

Further, a disc spring is used as an elastic member that pressurizes the plate to set the slip torque, but since the disc spring has a high spring constant in the pressurizing direction, the set slip torque becomes large. Therefore, although it is suitable for use in a large drive unit, it is not suitable for use in a small drive unit.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a torque transmission device having dimensions suitable for installation in a small drive unit and capable of easily adjusting a transmission torque. There is.

The present invention comprises a first rotating body, a second rotating body whose rotation center line coincides with the first rotating body, a transmission mechanism provided between the first rotating body and the second rotating body, and a transmission mechanism. In the torque transmission device having
The transmission mechanism has a first sliding portion that rotates with the first rotating body, an elastic plate that rotates with the first rotating body, and a second sliding portion that rotates with the second rotating body. ,
The elastic plate has an elastic deformed portion, and an adjusting screw extending in parallel with the rotation center line is screwed to the elastic deformed portion, and the adjusting screw causes the first sliding portion to slide in the second sliding portion. It is characterized in that the portion is pressurized.

In the torque transmission device of the present invention, a shaft portion is formed in the first rotating body, a shaft hole is formed in the second rotating body, and the shaft portion is rotatably inserted into the shaft hole.
The first sliding portion and the elastic plate are provided on the shaft tip portion of the shaft portion protruding from the shaft hole, and the first surface of the second rotating body facing the shaft tip portion is described. It can be configured as if the second sliding portion is provided.

In the torque transmission device of the present invention, the second rotating body is formed with a concave space released along the rotation center line, and the shaft portion, the elastic plate, and the adjusting screw are located in the space. It is preferable to do so.

In the torque transmission device of the present invention, a fourth sliding portion is provided on the second surface of the second rotating body opposite to the first surface, and the first rotating body slides with the fourth sliding portion. It is preferable that the third sliding portion is provided.

In the torque transmission device of the present invention, the first sliding portion is a first sliding plate along a surface orthogonal to the rotation center line, and the second sliding portion is along a surface orthogonal to the rotation center line. The two sliding plates can be configured such that one of the first sliding plate and the second sliding plate is integrally formed with a protrusion that abuts on the other sliding plate.

Further, in the torque transmission device of the present invention, the third sliding portion is a third sliding plate along a surface orthogonal to the rotation center line, and the fourth sliding portion is on a surface orthogonal to the rotation center line. It is a fourth sliding plate along the line, and can be configured as one in which a protrusion abutting with the other sliding plate is integrally formed on one of the third sliding plate and the fourth sliding plate.

In the torque transmission device of the present invention, the elastic plate is formed of a fixed portion fixed to the first rotating body , a notch portion located at a position farther from the rotation center line than the fixed portion, and the notch portion. preferable that also has the elastic deformation portion which is located away from the rotation center line.

In the torque transmission device of the present invention, the first sliding portion is provided with the first sliding portion and the elastic plate, and the first sliding portion is the second sliding portion of the second rotating body by the adjusting screw screwed to the elastic plate. It is pressed against the moving part. A pressing force is applied to the first sliding portion by the adjusting screw, and this pressing force can be set by the spring constant of the elastic plate supporting the adjusting screw. By tightening the adjusting screw, the transmission torque can be changed, and the transmission torque can be made relatively large as compared with the structure having no adjusting screw.

In the present invention, since the adjusting screw is directly screwed to the elastic plate provided on the first rotating body, the structure for applying a pressing force to the first sliding portion is simple and the number of parts is small. The height dimension along the rotation center line is also reduced, which makes it possible to provide a thin and compact torque transmission device.

Further, if one of the first sliding plate and the second sliding plate is integrally formed with a protrusion that contacts the other sliding plate, a friction plate, a friction ball, or the like can be used. The frictional force can be set without any problem, and the height dimension in the direction along the rotation center line can be lowered.

An explanatory view showing a drive unit of an in-vehicle display device using the torque transmission device according to the embodiment of the present invention. A perspective view showing a torque transmission device according to an embodiment of the present invention. An exploded perspective view showing a torque transmission device according to an embodiment of the present invention. A vertical sectional view showing a torque transmission device according to an embodiment of the present invention. An exploded perspective view showing a first sliding plate, a second sliding plate, a third sliding plate, and a fourth sliding plate used in the torque transmission device according to the embodiment of the present invention. A cross-sectional view of the third sliding plate and the fourth sliding plate shown in FIG. 5 cut along a VI-VI line.

FIG. 1 schematically shows the structure of an in-vehicle display device 1 and a drive unit 2 for moving the display device 1.
The display device 1 has a frame-shaped case 3 and a display panel 4 held by the case 3. The display device 1 is provided with a drive unit 2. The drive unit 2 is built in the housing, and the display device 1 is movably supported by the housing. The housing containing the drive unit 2 is embedded in an instrument panel or dashboard provided in front of the vehicle interior in the traveling direction (Z2 direction). Then, the display device 1 is installed so that the display screen of the display panel 4 faces the Z1 direction, which is the direction toward the vehicle interior.

As shown in FIG. 1, the drive unit 2 includes a moving mechanism 5. The moving mechanism 5 has a rack mechanism and a link mechanism that support the case 3 of the display device 1. The drive unit 2 is provided with the torque transmission device 40 according to the embodiment of the present invention. The torque transmission device 40 has a first rotating body 10 and a second rotating body 20 that rotate around the same rotation center line O. The first rotating body 10 has a gear portion 11, and the second rotating body 20 has a gear portion 21. The input gear 7 meshes with the gear portion 11 of the first rotating body 10. The power from the motor 6 provided in the drive unit 2 is decelerated by the reduction gear train (not shown) and transmitted to the input gear 7. The output gear 8 meshes with the gear portion 21 of the second rotating body 20. The rotational force of the output gear 8 is transmitted to the moving mechanism 5 via a transmission gear train (not shown).

When the motor 6 of the drive unit 2 is started, the power thereof is transmitted to the moving mechanism 5 via the torque transmission device 40. The display device 1 is moved in the Y1-Y2 direction by the operation of the rack mechanism or the link mechanism provided in the moving mechanism 5. The display device 1 is exposed upward from the instrument panel or dashboard by moving in the Y1 direction, and is housed inside the instrument panel or dashboard by moving in the Y2 direction. Alternatively, the display device 1 is housed inside the instrument panel or the dashboard in a horizontal posture with the display screen facing in the Y2 direction, and when the motor 6 is started, the horizontal posture display device 1 is moved by the moving mechanism 5. The display device 1 may be moved in the Z1 direction, and then the display device 1 may be rotated toward a posture in which the screen faces the Z1 direction.

Since the torque transmission device 40 is provided in the power transmission unit of the drive unit 2, when the movement of the display device 1 driven by the moving mechanism 5 is hindered by a human hand, or when the display device 1 in motion is hindered, the display device 1 is moving. The torque transmission device 40 can be prevented from slipping and damaging a person's hand when hit by a foreign object, the display device 1 can be prevented from being damaged, and the power transmission unit of the drive unit 2 can be damaged. It will be possible to prevent it.

The torque transmission device 40 needs to be small and lightweight in order to be arranged in a limited space. Therefore, it is preferable that the number of parts is the minimum. However, in the recent vehicle-mounted display device 1, since the display screen is large and the mass is large, it is necessary to relatively increase the torque transmitted by the torque transmission device 40. Further, it is preferable that the maximum value of the torque that can be transmitted can be adjusted in order to adjust the torque to be transmitted by the drive unit 2 to the optimum value or to correspond to the display device 1 of a different model.

FIG. 2 The torque transmission device 40 according to the embodiment of the present invention described below can be configured with a small size and a minimum number of parts so as to meet the above-mentioned demands, can transmit a relatively large torque, and can also adjust the transmission torque. It is possible.

As shown in the exploded perspective view of FIG. 3, the torque transmission device 40 is a transmission mechanism provided between the first rotating body 10 and the second rotating body 20, and between the first rotating body 10 and the second rotating body 20. Has 30. The first rotating body 10 and the second rotating body 20 are rotatably supported around the same rotation center line O. Both the first rotating body 10 and the second rotating body 20 are made of a synthetic resin material or a light metal such as an aluminum alloy.

As shown in FIG. 3, the first rotating body 10 is provided with a flange portion 12, and a gear portion 11 is formed on the outer periphery of the flange portion 12. A gear portion 21 is also formed on the outer circumference of the second rotating body 20. The gear portion 11 of the first rotating body 10 and the gear portion 21 of the second rotating body 20 have the same pitch circle diameter and the same module. However, the pitch circle diameter and the module of the gear portion 11 of the first rotating body 10 and the gear portion 21 of the second rotating body 20 may be different from each other. Further, in the drive unit 2 shown in FIG. 1, the first rotating body 10 is the power input side from the motor 6, the second rotating body 20 is the power output side, but the second rotating body 20 is the power input side. On the side, the first rotating body 10 may be the output side of the power.

As shown in FIG. 3, the first rotating body 10 is integrally formed with a shaft portion 13 projecting upward in the drawing from the central portion of the flange portion 12. The second rotating body 20 is provided with a bottom plate portion 22, and a shaft hole 23 is opened in the central portion of the bottom plate portion 22. As shown in the cross-sectional view of FIG. 4, the shaft portion 13 is inserted into the shaft portion 23 with almost no gap, and the second rotating body 20 is rotatably supported by the shaft portion 13. The first rotating body 10 is opened with a rotation support hole 14 penetrating the flange portion 12 and the shaft portion 13. A support shaft (not shown) is provided inside the housing containing the drive unit 2, and the rotary support hole 14 is rotatably inserted into the support shaft. The axis center of the support shaft is the rotation center line O, and the first rotating body 10 and the second rotating body 20 are rotatable about the same rotation center line O independently of each other.

As shown in FIGS. 2, 3 and 4, the transmission mechanism 30 is provided with an elastic plate 31. The elastic plate 31 is made of a stainless steel plate having a spring property or another spring steel plate. As shown in FIGS. 2 and 3, the elastic plate 31 is a circular plate. Notches 31a are formed at a plurality of positions (three places) away from the rotation center line O of the elastic plate. Each notch 31a has an arc shape. All the cutout portions 31a are located on the same arc centered on the rotation center line O, and have the same length in the circumferential direction.

The elastic plate 31 has a fixed portion 31b inside the notch 31a and an elastic deformation portion 31c outside the notch 31a. A rectangular fitting hole 31d is formed in the center of the fixing portion 31b, and fixing holes 31e are formed at four locations around the fitting hole 31d. A female screw hole 31f is formed in the elastically deformed portion 31c at a position facing the center of the circumferential length of the notch portion 31a. Further, in the middle of the notches 31a arranged in the circumferential direction, a locking recess 31g is formed from the outer peripheral edge of the elastic plate 31 toward the rotation center line O.

As shown in FIGS. 3 and 4, of the shaft portion 13 formed in the first rotating body 10, the portion protruding upward in the drawing from the shaft hole 23 of the second rotating body 20 is the shaft tip portion 15. be. A rectangular fitting protrusion 15a projecting upward in the drawing is integrally formed on the shaft tip portion 15. A fixed surface 15b orthogonal to the rotation center line O is formed below the fitting protrusion 15a, and a female screw hole 16 is formed on the fixed surface 15b. As shown in FIG. 4, the fitting protrusion 15a is fitted into the fitting hole 31d, the elastic plate 31 is installed on the fixing surface 15b, and the fixing screw 36 is inserted into the fixing hole 31e and screwed into the female screw hole 16. By putting it on, the fixing portion 31b of the elastic plate 31 is fixed to the fixing surface 15b of the shaft tip portion 15.

As shown in FIGS. 3 and 4, the first surface 22a of the bottom plate portion 22 formed on the second rotating body 20 facing upward in the drawing and the elastic plate 31 fixed to the shaft tip portion 15 are first. The first sliding plate 32 serving as the sliding portion and the second sliding plate 33 serving as the second sliding portion are overlapped and interposed. Further, between the flange portion 12 of the first rotating body 10 and the second surface 22b of the bottom plate portion 22 of the second rotating body 20 facing downward in the drawing, a third sliding plate 34 serving as a third sliding portion is formed. The fourth sliding plate 35, which is the fourth sliding portion, is overlapped and interposed. The first sliding plate 32, the second sliding plate 33, the third sliding plate 34, and the fourth sliding plate 35 are all made of stainless steel plates. The sliding plates 32, 33, 34, 35 function as clutch plates.

As shown in FIGS. 3 and 5, the first sliding plate 32 is provided with a center hole 32a and a locking claw 32b bent upward in the drawing from the outer peripheral edge portion. As shown in FIG. 4, the shaft portion 13 of the first rotating body 10 is inserted into the center hole 32a, and the locking claw 32b is inserted into the locking recess 31g formed in the elastic plate 31. Therefore, the first sliding plate 32 is restrained in the rotation direction so as to rotate together with the first rotating body 10 and the elastic plate 31. However, the first sliding plate 32 is not constrained in the axial direction along the rotation center line O.

As shown in FIGS. 3 and 5, the center hole 33a and the locking claw 33b bent downward from the inner peripheral edge of the center hole 33a are integrally formed in the second sliding plate 33. As shown in FIG. 4, the shaft portion 13 of the first rotating body 10 is inserted into the center hole 33a. In the second rotating body 20, a locking groove 24 is formed in the inner peripheral portion of the shaft hole 23 in the axial direction along the rotation center line O, and the locking claw 33b is inserted into the locking groove 24. ing. Therefore, the second sliding plate 33 is constrained in the rotation direction so as to rotate together with the second rotating body 20.

A protrusion is formed on either the first sliding plate 32 or the second sliding plate 33. In the torque transmission device 40 of the embodiment, a plurality of protrusions 33c are formed on the second sliding plate 33 so as to be raised upward in the drawing, and the lower surface of the first sliding plate 32 to which the protrusions 33c hit is flat. It is a face.

The second sliding plate 33 may be fixed to the second rotating body 20, or the first surface of the bottom plate portion 22 of the second rotating body 20 without providing the second sliding plate 33. 22a may be used as the second sliding portion.

As shown in FIGS. 3 and 5, the center hole 34a and the locking claw 34b bent downward from the inner peripheral edge of the center hole 34a are integrally formed in the third sliding plate 34. As shown in FIG. 4, the shaft portion 13 of the first rotating body 10 is inserted into the center hole 34a, and the locking claw 34b is inserted into the locking hole 17 formed in the flange portion 12 of the first rotating body 10. ing. Therefore, the third sliding plate 34 is constrained in the rotation direction so as to rotate together with the first rotating body 10.

As shown in FIGS. 3 and 5, the center hole 35a and the locking claw 35b bent upward in the drawing from the inner peripheral edge of the center hole 35a are integrally formed in the fourth sliding plate 35. As shown in FIG. 4, the shaft portion 13 of the first rotating body 10 is inserted through the center hole 35a, and the locking claw 35b is inserted into the locking groove 24 of the second rotating body 20. Therefore, the fourth sliding plate 35 is constrained in the rotation direction so as to rotate together with the second rotating body 20.

A protrusion is formed on either the third sliding plate 34 or the fourth sliding plate 35. In the torque transmission device 40 of the embodiment, a plurality of protrusions 34c are formed on the third sliding plate 34 so as to be raised upward in the drawing, and the lower surface of the fourth sliding plate 35 to which the protrusions 34c hit is flat. It is a face.

The third sliding plate 34 may be fixed to the first rotating body 10, and the fourth sliding plate 35 may be fixed to the second rotating body 20. Alternatively, without providing the third sliding plate 34 and the fourth sliding plate 35, the upper surface of the flange portion 12 of the first rotating body 10 becomes the third sliding portion, and the bottom plate portion 22 of the second rotating body 20 becomes the first. 2 The surface 22b may be the fourth sliding portion.

As shown in FIGS. 3 and 4, the adjusting screw 37 is screwed into the female screw holes 31f formed at a plurality of elastic deformation portions 31c of the elastic plate 31. The adjusting screw 37 extends parallel to the rotation center line O. When the adjusting screw 37 is tightened, the first sliding plate 32 is pressed downward in the drawing at the tip of the adjusting screw 37. This pressing force can be changed by the tightening amount of the adjusting screw 37. Further, this pressing force depends on the spring constant of the elastically deformed portion 31c of the elastic plate 31.

In FIG. 6, the facing portion between the third sliding plate 34 and the fourth sliding plate 35 is shown in an enlarged cross-sectional view. The upper surface of the protrusion 34c formed on the third sliding plate 34, which is a portion facing the fourth sliding plate 3, is a flat surface. When a pressing force is applied to the first sliding plate 32 from the adjusting screw 37, the third sliding plate (third sliding portion) 34 and the fourth sliding plate (fourth sliding portion) 35 are provided at a plurality of locations. Surface contact occurs at the protrusion 34c. The cross-sectional shape of the protrusion 33c formed on the second sliding plate 33 is the same as that of the protrusion 34c of the third sliding plate 34, and the first sliding plate (first sliding portion) is subjected to the pressing force. The 32 and the second sliding plate (second sliding portion) 33 come into surface contact at a plurality of places.

The torque transmission device 40 is assembled by inserting the shaft portion 13 of the first rotating body 10 into the center hole 34a of the third sliding plate 34 and inserting the locking claw 34b into the locking hole 17 of the first rotating body 10. Lock. Next, the shaft portion 13 is inserted into the center hole 35a of the fourth sliding plate 35 and the shaft hole 23 of the second rotating body 20, and the locking claw 35b of the fourth sliding plate 35 is inserted into the second rotating body 20. It is inserted into the locking groove 24 of the above from below. The shaft tip portion 15 of the shaft portion 13 projecting upward from the shaft hole 23 of the second rotating body 20 is inserted into the center hole 33a of the second sliding plate 33 and the center hole 32a of the first sliding plate 32. , The locking claw 33b of the second sliding plate 33 is inserted into the locking groove 24 of the second rotating body 20 from above.

Further, the fitting protrusion 15a of the shaft tip portion 15 of the shaft portion 13 is fitted into the fitting hole 31d of the elastic plate 31, and the locking claw 32b of the first sliding plate 32 is fitted into the locking recess of the elastic plate 31. Lock 31 g from below. Then, the fixing portion 31b of the elastic plate 31 is fixed to the fixing surface 15b of the shaft tip portion 15 of the shaft portion 13 by the fixing screw 36. Then, the tip of the adjusting screw 37 screwed to the elastically deformed portion 31c of the elastic plate 31 is abutted against the upper surface of the first sliding plate 32.

As shown in FIGS. 2, 3 and 4, the second rotating body 20 is released along the rotation center line O above the first surface 22a of the bottom plate portion 22 and inside the gear portion 21. A concave space 50 is formed. The shaft tip portion 15 of the shaft portion 13, the elastic plate 31, the adjusting screw 37, and the first sliding plate 32 and the second sliding plate 33 are located inside the space 50. The torque transmission device 40 can be configured within the diameter range of the gear portion 11 of the first rotating body 10 and the gear portion 21 of the second rotating body 20, and can be miniaturized.

For example, the support shaft provided in the drive unit 2 shown in FIG. 1 is inserted into the rotation support hole 14 of the first rotating body 10 to rotatably support the torque transmission device 40.
As shown in FIG. 1, power from the motor 6 is applied to the first rotating body 10, and the output of the second rotating body 20 drives the moving mechanism 5, which is a load. When the load acting on the second rotating body 20 increases due to an external force acting on the display device 1 that obstructs the movement while the drive unit 2 is operating, the first sliding plate 32 and the second sliding Slip occurs between the plate 33 and between the third sliding plate 34 and the fourth sliding plate 35, and the first rotating body 10 and the second rotating body 20 rotate relatively.

The slip torque, that is, the maximum value of the torque that can be transmitted by the torque transmission device 40 is set according to the tightening amount of the adjusting screw 37. By forming the elastic plate 31 from a stainless steel plate having high rigidity and high durability, the spring constant of the elastically deformed portion 31c can be increased, and the maximum value of the torque that can be transmitted can be increased. Further, by changing the tightening amount of the adjusting screw 37, it is possible to change the maximum value of the torque that can be transmitted.

As described above, in the torque transmission device 40 of the embodiment, as shown in FIG. 3, each member is sequentially stacked on the first rotating body 10, and the elastic plate 31 is attached to the first rotating body 10 by the fixing screw 36. Since the assembly is completed by fixing to the shaft tip portion 15, the assembly work is easy.

Since the elastic plate 31 has a notch portion 31a, even if the fixing portion 31b of the central portion is fixed to the shaft tip portion 15 of the shaft portion 13, the outer side of the notch portion 31a is an elastic deformation portion 31c. You will be able to function. Then, the pressing force applied from the adjusting screw 37 to the first sliding plate 32 can be set by the spring constant of the elastically deformed portion 31c and the tightening amount of the adjusting screw 37.

In the torque transmission device 40 of the embodiment, the adjusting screw 37 for setting the slip torque is supported by the elastic plate 31, and the elastic plate 31 functions as a supporting member of the adjusting screw 37 and generates a pressing force on the adjusting screw. Both functions of the spring member to be made can be exhibited. In this way, since the mechanism for setting the torque is composed of two types of members, the elastic plate 31 and the adjusting screw 37, the number of parts can be reduced, and the elastic plate 31 orthogonal to the rotation center line O can be used. Since the adjusting screw 37 is supported, the axial dimension along the rotation center line O is also small.

Further, the slip torque depends on the friction coefficient due to the sliding between the first sliding plate 32 and the second sliding plate 33 and the friction coefficient due to the sliding between the third sliding plate 34 and the fourth sliding plate 35. is doing. Since the sliding portions provided in two steps in the axial direction are all made of a plate material, the axial dimension along the rotation center line O is also reduced.

Further, as shown in FIG. 4, the second rotating body 20 has a space 50 formed above the first surface 22a, which is the upper surface of the bottom plate portion 22, and inside the gear portion 21, and the first rotating body 20 is formed. The shaft tip portion 15 of the shaft portion 13 of 10 and the elastic plate 31 and the adjusting screw 37 are housed inside the space 50. Therefore, it is possible to reduce both the axial dimension and the radial dimension along the rotation center line O. The space 50 is a concave space released along the rotation center line O.

As described above, the torque transmission device 40 of the embodiment can be configured to be compact and can transmit a relatively large torque.

1 Display device 2 Drive unit 6 Motor 7 Input gear 8 Output gear 10 1st rotating body 13 Shaft part 14 Rotating support hole 15 Tip part 20 2nd rotating body 22 Bottom plate part 22a 1st surface 22b 2nd surface 23 Shaft hole 30 Transmission Mechanism 31 Elastic plate 31a Notch 31b Fixed portion 31c Elastic deformation portion 31f Female screw hole 32 First sliding plate (first sliding portion)
33 Second sliding plate (second sliding part)
34 Third sliding plate (third sliding part)
35 4th sliding plate (4th sliding part)
37 Adjusting screw 40 Torque transmission device O Rotation center line

Claims (7)

Torque transmission having a first rotating body, a second rotating body whose rotation center line coincides with the first rotating body, and a transmission mechanism provided between the first rotating body and the second rotating body. In the device
The transmission mechanism has a first sliding portion that rotates with the first rotating body, an elastic plate that rotates with the first rotating body, and a second sliding portion that rotates with the second rotating body. ,
The elastic plate has an elastic deformed portion, and an adjusting screw extending in parallel with the rotation center line is screwed to the elastic deformed portion, and the adjusting screw causes the first sliding portion to slide in the second sliding portion. A torque transmission device characterized in that the part is pressurized. A shaft portion is formed in the first rotating body, a shaft hole is formed in the second rotating body, and the shaft portion is rotatably inserted into the shaft hole.
The first sliding portion and the elastic plate are provided on the shaft tip portion of the shaft portion protruding from the shaft hole, and the first surface of the second rotating body facing the shaft tip portion is described. The torque transmission device according to claim 1, wherein a second sliding portion is provided. The second aspect of claim 2, wherein a concave space is formed in the second rotating body to be released along the rotation center line, and the shaft portion, the elastic plate, and the adjusting screw are located in the space. Torque transmission device. A fourth sliding portion is provided on the second surface of the second rotating body opposite to the first surface, and the first rotating body is provided with a third sliding portion that slides on the fourth sliding portion. The torque transmission device according to claim 2 or 3. The first sliding portion is a first sliding plate along a surface orthogonal to the rotation center line, and the second sliding portion is a second sliding plate along a surface orthogonal to the rotation center line. The torque transmission device according to claim 2 or 3, wherein a protrusion that contacts the other sliding plate is integrally formed on one of the first sliding plate and the second sliding plate. The third sliding portion is a third sliding plate along a surface orthogonal to the rotation center line, and the fourth sliding portion is a fourth sliding plate along a surface orthogonal to the rotation center line. The torque transmission device according to claim 4, wherein a protrusion that contacts the other sliding plate is integrally formed on one of the third sliding plate and the fourth sliding plate. The elastic plate has a fixed portion fixed to the first rotating body , a notch portion located at a position farther from the fixed portion from the rotation center line, and a notch portion separated from the rotation center line. torque transmission device according to any one of claims 1 and an the elastic deformation portion at the position 6.

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