JP2017166659A - Torque transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque transmission device capable of exhibiting an excellent vibration absorption function even in operation of an engine brake due to downshift.SOLUTION: A torque transmission device 100 configured to transmit torque of a first rotor 1 to a second rotor 2, includes: a spring 3 configured to absorb torque fluctuation; sheet materials 41, 42 provided in a relative movable manner between the spring 3 and the first and second rotors 1, 2; and sheet material holding bodies 5, 6 configured to hold the sheet materials 41, 42. The sheet material holding bodies 5, 6 have: a base part rotatably supported to the first rotor 1 through a bearing part; and a sheet material holding part projecting radially outward from the base part, and holding the sheet materials 41, 42 so as not to move radially outward.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a torque transmission device having a function of absorbing torque fluctuations.

  Conventionally, a first rotating body connected to a power source and a second rotating body connected to the first rotating body via an elastic body are provided, and the torque of the first rotating body is controlled via the elastic body. An apparatus is known in which torque fluctuations between a first rotating body and a second rotating body are absorbed by an elastic body while being transmitted to the two rotating bodies (see, for example, Patent Document 1).

  In the device described in Patent Document 1, the first rotating body is connected to the engine, and the second rotating body is connected to the transmission via a clutch. A plurality of springs in the circumferential direction are disposed in the accommodating portion provided inside the first rotating body, and sheet members (spring receivers) are disposed at both ends of each spring, and the sheets are adjacent to each other in the circumferential direction. A part of the second rotating body is disposed between the members. As a result, the torque of the first rotating body is transmitted to the second rotating body via the spring and the seat member.

JP2015-86965A

  However, in the apparatus described in Patent Document 1, since the sheet member is disposed so as to face the outer peripheral surface of the housing portion, when the centrifugal force acting on the sheet member increases, the sheet member becomes the housing portion of the first rotating body. There is a risk of sticking to the outer peripheral surface. As a result, it becomes difficult to exert an appropriate elastic force on the spring between the first rotating body and the second rotating body, and the vibration absorbing function of the apparatus is lowered.

  One aspect of the present invention is a torque transmission device that transmits torque generated by a power source to a driven body, and is provided rotatably about an axis, and is connected to either the power source or the driven body. Between the first rotating body and the second rotating body, a second rotating body that is rotatably provided about the axis, and is connected to either the power source or the driven body. It is arranged in the torque transmission path, transmits torque from one of the first rotating body and the second rotating body to the other of the first rotating body and the second rotating body, and the first rotating body and the second rotating body. An elastic body that absorbs torque fluctuation between the body and the elastic body and the first rotating body and the second rotating body are provided so as to be relatively movable with respect to the first rotating body and the second rotating body. The sheet material can be rotated relative to the first and second rotating bodies around the axis. A first rotating body is a container that accommodates the sheet material so as to be movable in the circumferential direction together with the elastic body, on the radially outer side of the sheet material. The sheet material has an accommodating portion having an outer peripheral surface and a side end surface that restricts movement of the sheet material in the circumferential direction, and the sheet material has an elastic body holding portion that holds an elastic body on one circumferential surface, while in the circumferential direction. The other end surface has a pressing surface on which a pressing force is applied from at least one of the side end surface of the first rotating body and the side end surface of the second rotating body, and the sheet material holder is provided with the first rotating body via the bearing portion. Or it has the base part rotatably supported by the 2nd rotary body, and the sheet | seat material holding | maintenance part which protrudes radially outward from the base part, and hold | maintains a sheet | seat material so that a movement to a radial direction outer side is impossible.

  According to the present invention, the base member is rotatably supported by the first rotating body or the second rotating body via the bearing portion, and the sheet material is radially disposed by the sheet material holding body projecting radially outward from the base portion. Since the sheet material is held so as to be immovable to the outside, sticking of the sheet material due to centrifugal force can be suppressed, and a good vibration absorbing function of the apparatus can be exhibited.

The figure which shows notionally the example of application of the torque transmission apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the principal part structure of the torque transmission apparatus which concerns on the 1st Embodiment of this invention, and sectional drawing along the II-II line | wire of FIG. It is sectional drawing which shows the principal part structure of the torque transmission apparatus which concerns on the 1st Embodiment of this invention, and sectional drawing along the III-III line of FIG. Sectional drawing along the IV-IV line of FIG. The top view of the back board of the 1st rotary body which comprises the torque transmission apparatus which concerns on the 1st Embodiment of this invention. The figure which shows the change with time passage of the torque which acts on a 2nd rotary body. The figure which shows the relationship between the twist angle of the 2nd rotary body with respect to a 1st rotary body, and the torque which acts on a 2nd rotary body. The 1st figure explaining the change of the twist angle of the 2nd rotary body with respect to a 1st rotary body which is a comparative example of this invention. The 2nd figure explaining the change of the twist angle of the 2nd rotating body with respect to the 1st rotating body which is a comparative example of the present invention. The 3rd figure explaining the change of the twist angle of the 2nd rotary body with respect to a 1st rotary body which is a comparative example of this invention. The figure which shows the change with time passage of the torque which acts on the 2nd rotary body when the event of FIG. 7A-FIG. 7C occurred. The figure which shows the relationship between the twist angle of the 2nd rotary body with respect to a 1st rotary body, and the torque which acts on a 2nd rotary body when the event of FIG. 7A-FIG. 7C arises. The top view of the 1st sheet guide which constitutes the torque transmission device concerning a 1st embodiment of the present invention. The top view of the 2nd sheet | seat guide which comprises the torque transmission apparatus which concerns on the 1st Embodiment of this invention. The figure which shows an example of operation | movement of the torque transmission apparatus which concerns on the 1st Embodiment of this invention. The figure which shows the other example of operation | movement of the torque transmission apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the principal part structure of the torque transmission apparatus which concerns on the 2nd Embodiment of this invention, and sectional drawing along the XII-XII line | wire of FIG. Sectional drawing along the XII-XII line | wire of FIG. The top view of the 1st sheet | seat guide which comprises the torque transmission apparatus which concerns on the 2nd Embodiment of this invention. The top view of the 2nd sheet | seat guide which comprises the torque transmission apparatus which concerns on the 2nd Embodiment of this invention. The figure which shows the modification of FIG.

-First embodiment-
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram conceptually illustrating an application example of the torque transmission device 100 according to the first embodiment of the present invention. Torque transmission device 100 is interposed in a power transmission path between engine 101 and transmission 102 via a clutch (not shown) or without a clutch.

  The torque transmission device 100 includes a first rotator 1 and a second rotator 2 that are rotatably provided about an axis CL0, and a torque transmission path TP between the first rotator 1 and the second rotator 2. And a spring 3 disposed on the surface. The first rotating body 1 is connected to an output shaft (crankshaft) 101 a of the engine 101, and the second rotating body 2 is connected to an input shaft 102 a of the transmission 102. Torque from the engine 101 input to the first rotating body 1 is transmitted to the second rotating body 2 via the spring 3. At this time, the torque fluctuation between the first rotating body 1 and the second rotating body 2 is absorbed by the expansion and contraction of the spring 3. Thereby, it is possible to suppress the vibration due to the rotational fluctuation of the engine 101 from being transmitted to the transmission 102.

  2 and 3 are cross-sectional views (cross-sectional views taken along the axis CL0) showing the main configuration of the torque transmission device 100 according to the first embodiment of the present invention, and FIG. It is sectional drawing along a line (sectional drawing orthogonal to the axis line CL0). 2 corresponds to the cross-sectional shape along the line II-II in FIG. 4, and FIG. 3 corresponds to the cross-sectional shape along the line III-III in FIG. In the following, for the sake of convenience, the front-rear direction is defined along the axis CL0 as shown in FIGS. 2 and 3, the direction extending radially about the axis CL0 is the radial direction, and the direction along the circle centering on the axis CL0 is the direction. The circumferential direction is defined, and the configuration of each part will be described according to these definitions.

  As shown in FIG. 2, the first rotating body 1 integrally includes a front plate 11 and a rear plate 12. The front plate 11 is a substantially ring-shaped plate member centered on the axis line CL0, and has a circular inner peripheral surface 11a. The rear plate 12 includes a substantially disc-shaped side plate 121 centered on the axis CL0, a shaft 122 protruding forward from the center of the side plate 121 along the axis CL0, and an outer diameter side end of the side plate 121. And an annular portion 123 protruding forward from the portion. In addition, although illustration is abbreviate | omitted, the torque input part into which the torque from the engine 101 is input is provided in the 1st rotary body 1 (for example, outer peripheral surface of the rear board 12).

  The front end surface of the annular portion 123 of the rear plate 12 is joined to the rear surface of the front plate 11 by welding or via a bolt, whereby the front plate 11 and the rear plate 12 are integrated. At this time, a ring-shaped space SP <b> 0 whose outer peripheral side is covered by the annular portion 123 is formed between the front plate 11 and the side plate portion 121 of the rear plate 12.

  The second rotating body 2 is disposed in the space SP0 and has a substantially ring-shaped inner plate 21 having a circular inner peripheral surface 21a and an outer peripheral surface 21b with the axis CL0 as the center, and the inner plate 21 in front of the front plate 11. And a substantially ring-shaped outer plate 22 arranged in parallel with each other. The inner plate 21 has a substantially ring-shaped projecting portion 23 projecting forward at the radially inner end. The front end surface of the projecting portion 23 is in contact with the rear end surface of the outer plate 22, and the inner plate 21 and the outer plate 22 are a plurality of circumferential connecting pins 24 that penetrate the outer plate 22 and the projecting portion 23 in the axial direction. (Rivets) are connected together. An oil seal 26 is interposed between the inner peripheral surface 11 a of the front plate 11 and the outer peripheral surface of the protruding portion 23.

  Further, as shown in FIG. 4, the second rotating body 2 has a plurality (two in the figure) of protruding portions 25 that protrude from the outer peripheral surface 21 b of the inner plate 21 radially outward at equal intervals in the circumferential direction. The protruding portion 25 has an outer peripheral surface 250 and a pair of side end surfaces 251 and 252 in the circumferential direction. The outer peripheral surface 250 is located on the radially inner side with respect to the inner peripheral surface 123a of the annular portion 123, and is formed in a substantially arc shape with the axis CL0 as the center.

  As shown in FIG. 2, the inner plate 21 and the outer plate 22 of the second rotating body 2 are arranged with a gap in the front-rear direction from the front plate 11 of the first rotating body 1. The inner peripheral surface 21a of the inner plate 21 is rotatably supported by the shaft portion 122 of the first rotating body 1 via the bearing BG1, so that the second rotating body 2 can rotate relative to the first rotating body 1. Become. Although illustration is omitted, the outer plate 22 of the second rotating body 2 is provided with a torque output unit that outputs torque to the transmission 102.

  FIG. 5 is a plan view of the rear plate 12 (viewed from the front). FIG. 5 shows a part of a spring 3 and a sheet material 4 to be described later. Furthermore, in FIG. 5, a part of 2nd rotary body 2 is shown with a dotted line. In addition, the relative angle of the 2nd rotary body 2 with respect to the 1st rotary body 1 (rear board 12) shown by FIG. 5 differs from what was shown in FIG. In this embodiment, the sheet guides 5 and 6 are disposed adjacent to the sheet material 4, and the configuration of the sheet guides 5 and 6 will be described later.

  As shown in FIGS. 2 and 5, a plurality (two in the figure) of boundary portions 15 having the same shape are projected from the front surface of the side plate portion 121 at equal intervals in the circumferential direction. The boundary portion 15 has a substantially rectangular shape in plan view, the inner peripheral surface 150 thereof is located radially outside the inner plate 21 of the second rotating body 2, and the outer diameter side end is the inner periphery of the annular portion 123. It is connected to the surface 123a. The boundary portion 15 has a pair of side end surfaces 151 and 152 in the circumferential direction. In addition, the boundary part 15 of the 1st rotary body 1 and the protrusion part 25 of the 2nd rotary body 2 exhibit substantially the same shape by planar view, and the side end surfaces 251 and 252 of the protrusion part 25 are extended back in FIG. The side end surfaces 151 and 152 of the boundary portion 15 are located on or substantially on the finished surface.

  In FIG. 5, an arc-shaped space (a part of the space SP0) from the side end surface 151 of one boundary portion 15 to the side end surface 152 of the other boundary portion 15 inside the inner peripheral surface 123a of the annular portion 123 is The housing part SP1 is configured. That is, the boundary portion 15 is a boundary between a pair of accommodating portions SP1 adjacent in the circumferential direction. The inner peripheral surface 123a of the annular portion 123 constitutes the outer peripheral surface of the accommodating portion SP1.

  As shown in FIG. 4, a plurality (four in the figure) of springs 3 are arranged in series in each housing part SP1. The spring 3 is, for example, a coil spring, and both end portions in the longitudinal direction are held by a sheet material (spring receiver) 4. The sheet material 4 includes a first sheet material 41 and a second sheet material 42 disposed at both ends in the circumferential direction of the housing portion SP1, and a plurality of sheets (between the first sheet material 41 and the second sheet material 42). 3) in the figure. The protruding portion 25 of the second rotating body 2 is disposed between the first sheet material 41 and the second sheet material 42 that are adjacent to each other in the circumferential direction. Of the intermediate sheet material 43, the material adjacent to the first sheet material 41 may be referred to as a first intermediate sheet material 43A, and the material adjacent to the second sheet material 42 may be referred to as a second intermediate sheet material 43B.

  When the rotation direction of the first rotating body 1 that is rotationally driven by the engine 101 is indicated by an arrow R1 in FIG. 4, the first sheet material 41 is located at the rearmost portion in the rotation direction in the housing portion SP1, and the second sheet material. 42 is located at the forefront in the rotational direction. Although detailed illustration is omitted in FIG. 2, the thickness of the sheet material 4 in the front-rear direction is such that the sheet material 41 smoothly rotates relatively between the rear surface of the front plate 11 and the front surface of the rear plate 12. The length from the rear surface of the front plate 11 to the front surface of the rear plate 12 is set to be shorter by a predetermined length, for example.

  As shown in FIGS. 4 and 5, spring holding portions 411 and 421 for holding the spring 3 are formed on one end surface in the circumferential direction of the first sheet material 41 and the second sheet material 42, respectively. The pressing surfaces 412 and 422 to which the pressing force acts are formed from the side end surfaces 151 and 152 of the boundary portion 15 of the first rotating body 1 through the sheet guides 5 and 6. A pressing force acts on the pressing surfaces 412 and 422 also from the side end surfaces 251 and 252 of the protruding portion 25 of the second rotating body 2 via the sheet guides 5 and 6.

  As shown in FIG. 4, spring holding portions 431 that hold the springs 3 are formed on both end surfaces in the circumferential direction of the intermediate sheet material 43. Note that the spring holding portions 411, 421, 431 of each sheet material 4 are configured by circular grooves corresponding to the outer shape of the spring 3, for example. On the inner peripheral surface 45 of the first intermediate sheet material 43A and the second intermediate sheet material 43B, protrusions 432 that protrude to the inner diameter side are provided.

  Each sheet material 4 is accommodated in the accommodating portion SP1 so as to be movable in the circumferential direction and the radial direction. The pressing surface 412 of the first sheet material 41 is in contact with the side end surface 151 of the boundary portion 15 of the first rotating body 1 or the side end surface 251 of the protruding portion 25 of the second rotating body 2 via the sheet guide 5. , Movement in the direction opposite to the R1 direction (R2 direction) is restricted. The second sheet material 42 has its pressing surface 422 abutting on the side end surface 152 of the boundary portion 15 or the side end surface 252 of the protruding portion 25 via the sheet guide 6, so that movement in the R1 direction is restricted.

  Each sheet material 4 has an inner peripheral surface 45 and an outer peripheral surface 46. In particular, as shown in FIG. 4, the outer peripheral surface of the intermediate sheet material 43 corresponds to the outer peripheral surface of the accommodating portion SP1 (the inner peripheral surface 123a of the annular portion 123), that is, a circle having the same or substantially the same shape as the outer peripheral surface 123a. It is formed in an arc shape. When the inner peripheral surface 45 of the sheet material 4 contacts the outer peripheral surface 21b of the inner plate 21 or the outer peripheral surface 46 of the sheet material 4 contacts the outer peripheral surface 123a of the accommodating portion SP1, the radial movement of the sheet material 4 occurs. Is regulated.

  The spring constants of the plurality of springs 3 arranged in series in the housing part SP1 may be equal to each other or may be different from each other. For example, as shown in FIG. 4, when the four springs 3 in the circumferential direction are defined as a first spring 3A, a second spring 3B, a third spring 3C, and a fourth spring 3D in order from the rear side in the R1 direction, The spring constants of 3B and the third spring 3C may be larger than the spring constants of the first spring 3A and the fourth spring 3D. Alternatively, the spring constants of the third spring 3C and the fourth spring 3D may be larger than the spring constants of the first spring 3A and the second spring 3B. The spring constant can be increased, for example, by increasing the diameter of the spring 3. The spring constant of the predetermined spring 3 may be increased by arranging a small-diameter spring inside the large-diameter spring and making the spring 3 have a double structure.

  A basic operation of the torque transmission device 100 will be described. As shown in FIGS. 4 and 5, a line passing through the middle in the circumferential direction of the boundary portion 15 of the first rotating body 1 and orthogonal to the axis CL0 is defined as a first center line CL1, and the protruding portion 25 of the second rotating body 2 is defined. A line passing through the middle in the circumferential direction and orthogonal to the axis CL0 is defined as a second center line CL2.

  FIG. 4 shows an initial state (also referred to as a neutral state) in which no torque acts on the first rotating body 1 and the second rotating body 2, and in the initial state, the first center line CL1 and the second center line. CL2 matches. Therefore, the angle formed by the first center line CL1 and the second center line CL2, that is, the twist angle (relative angle) θ of the second rotating body 2 with respect to the first rotating body 1 is 0 °.

  From this state, when torque from the engine 101 is input to the first rotating body 1, the input torque T is applied from the side end surface 151 of the boundary portion 15 to the pressing surface 412 of the first sheet material 41 as shown in FIG. 5. Act on. The torque T acting on the first sheet material 41 further passes from the pressing surface 422 of the second sheet material 42 to the inner plate 21 via the spring 3, the intermediate sheet material 43, and the second sheet material 42 that constitute the torque transmission path TP. It acts on the side end face 252 of the protruding portion 25. Thereby, the torque T acts on the 2nd rotary body 2, and the 2nd rotary body 2 rotates in R1 direction.

  At this time, the spring 3 of the accommodating portion SP1 expands and contracts according to the magnitude of the torque T, and the torsion angle θ of the second rotating body 2 with respect to the first rotating body 1 changes due to the expansion and contraction of the spring 3. That is, as the torque T increases, the twist angle θ increases. By changing the torsion angle θ in this way, it is possible to absorb torque fluctuations of the first rotating body 1 caused by rotational vibrations (combustion vibrations) of the engine 101, and to rotate the second rotating body 2 stably. Can be made.

  As shown in FIG. 5, the twist angle θ is positive when the rotation amount of the first rotating body 1 in the R1 direction is larger than the rotation amount of the second rotating body 2. On the other hand, when the amount of rotation of the first rotating body 1 in the R1 direction is smaller than the amount of rotation of the second rotating body 2, it becomes negative. For example, during normal operation, torque acts on the second rotator 2 from the first rotator 1, and in this case, the twist angle θ is positive. On the other hand, when a torque acts on the first rotating body 1 from the second rotating body 2 during sudden deceleration or the like, the torsion angle θ becomes negative.

  As shown in FIG. 5, during normal operation, the pressing surface 412 of the first sheet material 41 contacts the side end surface 151 of the boundary portion 15 via the sheet guide 5, and the side of the protruding portion 25 of the second rotating body 2. Separated from the end face 251. On the other hand, the pressing surface 422 of the second sheet material 42 contacts the side end surface 252 of the protruding portion 25 via the sheet guide 6 and is separated from the side end surface 152 of the boundary portion 15.

  6A is a diagram showing a change with time of the torque T acting on the second rotating body 2, and FIG. 6B is a diagram showing the relationship between the twist angle θ and the torque T acting on the second rotating body 2. It is. The characteristic of FIG. 6B shows the spring characteristic of the torque transmission device 100, and the torque T increases as the torsion angle θ increases. The slope (spring constant) of the spring characteristic is small in the region where the twist angle θ is equal to or smaller than the predetermined value θa, and increases when the twist angle θ exceeds the predetermined value θa. As shown in FIG. 6A, when the torque T fluctuates in a positive range (T> 0) due to the vibration (combustion vibration or the like) of the engine 101, the torsion angle θ is, for example, θ1 ≦ θ as shown in FIG. 6B. It changes in the range of ≦ θ2. Thereby, the torque fluctuation of the 2nd rotary body 2 can be reduced.

  By the way, for example, when the engine brake is activated by downshifting, the centrifugal force acting on the sheet material 4 increases, and the sheet material 4 may stick to the outer peripheral surface 123a of the accommodating portion SP1 of the first rotating body 1. As a result, the sheet material 4 cannot follow the movement of the second rotating body 2, and the side end surface 252 of the protruding portion 25 of the second rotating body 2 is separated from the pressing surface 422 of the second sheet material 42, and then protrudes. When the portion 25 and the second sheet material 42 come into contact again, an impact is generated in the torque transmission device 100. This shock causes rotation abnormality on the engine side, and as a result, misfire detection based on rotation of the crankshaft may be erroneously performed.

  This point will be further described. FIGS. 7A to 7C are diagrams for explaining changes in the twist angle θ of the second rotating body 2 (inner plate 21) with respect to the first rotating body 1 (rear plate 12). FIGS. FIG. 6 is a diagram showing a change in torque T acting on the two-rotor 2 and a relationship between the twist angle θ and the torque T. These are comparative examples of the present embodiment. FIGS. 7A to 7C show the operation when the torque transmission device 100 does not have the sheet guides 5 and 6, and FIGS. 8A and 8B show the characteristics in that case.

  FIG. 7A shows a state in which the first rotating body 1 has suddenly decelerated when the engine brake is activated by downshifting. Immediately after the downshift, the first rotating body 1 rotates at a high speed and the centrifugal force acting on the sheet material 4 increases, and the sheet material 4 sticks to the outer peripheral surface 123a of the accommodating portion SP1. In this state, the operation amount of the accelerator pedal is small, for example, the accelerator pedal is not operated, so the rotation amount of the second rotating body 2 in the R1 direction is more than the rotation amount of the first rotating body 1 in the R1 direction. Will increase. As a result, the side end surface 251 of the projecting portion 25 of the second rotating body 2 comes into contact with the pressing surface 412 of the first sheet material 41, and torque T1 (pressing force) in the R1 direction from the projecting portion 25 to the first sheet material 41. Works. At this time, the side end surface 251 of the protruding portion 25 functions as a torque transmitting portion of the second rotating body 2, and the pressing surface 412 of the first sheet material 41 functions as a torque transmitted portion of the first rotating body 1.

  When the torque T1 is input to the first sheet material 41, the sheet material 4 is pushed into the side end surface 152 side of the boundary portion 15 while sliding on the outer peripheral surface 123a. As a result, as shown in FIG. 7A, the pressing surface 422 of the second sheet material 42 contacts the side end surface 152 of the boundary portion 15. At this time, the end surfaces of the sheet materials 4 adjacent to each other in the circumferential direction come close to or come into contact with each other, and the spring 3 contracts in the circumferential direction from the pressing surface 412 of the first sheet material 41 to the pressing surface 422 of the second sheet material 42. The length is minimized. In this state, the torque T1 acting on the second rotating body 2 is represented by a point A in FIG. 8B, for example, and the twist angle θ is the minimum (θA).

  Thereafter, when the accelerator pedal is operated and the first rotating body 1 is accelerated, the side end surface 251 of the protrusion 25 of the second rotating body 2 is separated from the first sheet material 41 as shown in FIG. 7B. Further, the second sheet material 42 in contact with the side end surface 152 of the boundary portion 15 approaches the side end surface 252 of the protruding portion 25, and the twist angle becomes θB (<0) larger than θA. In this state, the sheet material 4 remains adhered to the outer peripheral surface 123a of the accommodating portion SP1, and the spring 3 is contracted more than during normal operation without adhesion. For example, the spring 3 is contracted to the maximum or almost the maximum. Therefore, the apparent spring constant of the spring 3 is large and the rigidity is high.

  At this time, since there is a gap GP between the second sheet material 42 and the protruding portion 25, the torque T acting on the second rotating body 2 becomes 0 as shown at point B in FIG. The relationship with the torque T is, for example, a point B in FIG. 8B. From this state, when a positive torque fluctuation occurs on the first rotating body 1, the torsion angle θ increases (closes to 0) while the torque T remains zero as shown in FIG. 8B.

  When the first rotating body 1 is further accelerated, as shown in FIG. 7C, the pressing surface 422 of the second sheet material 42 comes into contact with the side end surface 252 of the protruding portion 25 of the second rotating body 2, and the second rotating body 2 is subjected to torque T2. Thereby, as shown by a point C in FIG. 8A, the torque T increases rapidly. At this time, although the twist angle θ becomes 0, the sheet material 4 remains attached to the outer peripheral surface 123a of the accommodating portion SP1, and the rigidity of the spring 3 is increased, so the twist angle θ does not increase any more. Accordingly, the spring 3 cannot absorb the impact at the time of contact between the second sheet material 42 and the protruding portion 25, and an impact is generated in the torque transmission device 100. The relationship between the twist angle θ and the torque T in this case is represented by a point C in FIG. 8B.

  Thereafter, when the rotation of the first rotating body 1 fluctuates due to the rotational vibration of the engine 101, the first rotating body 1 and the second rotating body 2 repeat the contact in FIG. 7C and the separation in FIG. 7B. Therefore, the relationship between the twist angle θ and the torque T changes along the arrow connecting the point B, the origin, and the point C in FIG. 8B. Therefore, the torque transmission device 100 is repeatedly subjected to an impact, and there is a possibility of adverse effects such as misdetection of misfire.

  Such an event not only occurs when the accelerator pedal is stepped on gradually after the engine brake is activated as described above, but, for example, when the accelerator pedal is depressed, the accelerator pedal is depressed to accelerate, This also occurs when the accelerator pedal is loosened after the main line merges to reduce the accelerator opening. That is, it occurs in a state where the sheet material 4 is adhered during downshifting or high acceleration rotation, and in a low torque region (small accelerator opening). In order to prevent such an event, in this embodiment, the torque transmission device 100 is configured as follows.

  As shown in FIGS. 3 and 4, the torque transmission device 100 includes a first sheet guide 5 and a second sheet guide 6 as a characteristic configuration of the present embodiment. 9A and 9B are plan views (views seen from the front) of the first sheet guide 5 and the second sheet guide 6, respectively. 9A and 9B show a part of the sheet material 4 together.

  As shown in FIG. 9A, the first sheet guide 5 includes a ring plate portion 51 having a circular inner peripheral surface 5a and an outer peripheral surface 5b with the axis CL0 as the center, and a radially outer side from the outer peripheral surface 5b of the ring plate portion 51. A plurality (two in the figure) of the arm portions 52 projecting at equal intervals in the circumferential direction, and a plurality of (two in the figure) stoppers 53 projecting from the outer peripheral surface 5b radially outward at equal intervals in the circumferential direction. And have. The arm portion 52 includes a first plate portion 521 extending radially from the outer peripheral surface 5b, and an arc shape or a linear shape extending from the distal end portion of the first plate portion 521 in the rotation direction (R1 direction) of the first rotating body 1. The second plate portion 522 is present, and the whole has a substantially L shape in plan view.

  The radial length of the first plate portion 521 is longer than the radial length of the first sheet material 41. One end surface 521a in the circumferential direction of the first plate portion 521 is formed in a shape corresponding to the pressing surface 412 so as to be in surface contact with the pressing surface 412 of the first sheet material 41. The other end surface 521b in the circumferential direction of the first plate portion 521 is in side contact with the side end surface 151 of the boundary portion 15 of the first rotating body 1 and the side end surface 251 of the protruding portion 25 of the second rotating body 2. , 251. The inner peripheral surface 522a of the second plate portion 522 is formed in a shape corresponding to the outer peripheral surface 46 so as to be in surface contact with the outer peripheral surface 46 of the first sheet material 41, and the outer peripheral surface 522b of the second plate portion 522 is It is formed in an arc shape around the axis line CL0.

  Thus, the first sheet material 41 can be stored inside the arm portion 52 in a state where the first plate portion 521 and the second plate portion 522 are in surface contact with each other. The arm portion 52 is configured so that the first sheet material 41 does not fall off from the inside. For example, the protrusion of the first sheet material 41 is prevented by providing a protrusion 522c at the tip of the second plate 522 toward the inside in the radial direction. In order to prevent the first sheet material 41 from falling off, the inner peripheral surface 522a of the second plate portion 522 may be inclined radially inward over the distal end portion of the second plate portion 522.

  The stopper 53 on the outer peripheral surface 5 b of the ring plate portion 51 is provided at a position away from the first plate portion 521 by a predetermined distance. A direction in which the stopper 53 is separated from the first sheet material 41 by abutting against the protrusion 432 of the inner peripheral surface 45 of the first intermediate sheet material 43A (FIG. 4) disposed adjacent to the first sheet material 41. The movement of the first intermediate sheet material 43A in the circumferential direction can be restricted.

  As shown in FIG. 9B, the second sheet guide 6 includes a ring plate portion 61 having a circular inner peripheral surface 6a and an outer peripheral surface 6b with the axis CL0 as the center, and a radially outer side from the outer peripheral surface 6b of the ring plate portion 61. A plurality (two in the figure) of arm portions 62 projecting at equal intervals in the circumferential direction and a plurality of (two in the figure) stoppers 63 projecting from the outer peripheral surface 6b radially outward at equal intervals in the circumferential direction. And have. The arm portion 62 has a first plate portion 621 extending radially from the outer peripheral surface 6b, and an arc shape or a straight line from the distal end portion of the first plate portion 621 in a direction opposite to the rotation direction of the first rotating body 1 (R2 direction). 2nd plate part 622 extended in the shape, and the whole exhibits a substantially L shape in planar view.

  The radial length of the first plate portion 621 is longer than the radial length of the second sheet material 42. One end surface 621 a in the circumferential direction of the first plate portion 621 is formed in a shape corresponding to the pressing surface 422 so as to be in surface contact with the pressing surface 422 of the second sheet material 42. The other end surface 621b in the circumferential direction of the first plate portion 621 is in side contact with the side end surface 152 of the boundary portion 15 of the first rotating body 1 and the side end surface 252 of the protruding portion 25 of the second rotating body 2. , 252. The inner peripheral surface 622a of the second plate portion 622 is formed in a shape corresponding to the outer peripheral surface 46 so as to be in surface contact with the outer peripheral surface 46 of the second sheet material 42, and the outer peripheral surface 622b of the second plate portion 622 is It is formed in an arc shape around the axis line CL0.

  Accordingly, the second sheet material 42 can be stored inside the arm portion 62 in a state where the first plate portion 621 and the second plate portion 622 are in surface contact with each other. The arm portion 62 is configured such that the second sheet material 42 does not fall off from the inside. For example, it is possible to prevent the second sheet material 42 from falling off by providing a protruding portion 622c toward the inner side in the radial direction at the distal end portion of the second plate portion 622. In order to prevent the second sheet material 42 from falling off, the inner peripheral surface 622a of the second plate portion 622 may be inclined radially inward over the tip portion of the second plate portion 622.

  The stopper 63 on the outer peripheral surface 6 b of the ring plate portion 61 is provided at a position away from the first plate portion 621 by a predetermined distance. A direction in which the stopper 63 is separated from the second sheet material 42 by contacting the protrusion 432 of the inner peripheral surface 45 of the second intermediate sheet material 43B (FIG. 4) disposed adjacent to the second sheet material 42. The movement of the second intermediate sheet material 43B in the circumferential direction can be restricted.

  As shown in FIG. 3, the first sheet guide 5 and the second sheet guide 6 are arranged between the side plate portion 121 and the inner plate 21 between the side plate portion 121 of the first rotating body 1 and the inner plate 21 of the second rotating body 2. The plates 21 are arranged side by side with a gap in the front-rear direction. Further, a gap is provided between the first sheet guide 5 and the second sheet guide 6 in the front-rear direction so that the sheet guides 5 and 6 can rotate relative to each other. The inner peripheral surface 5a of the first sheet guide 5 is rotatably supported by the shaft portion 122 of the first rotating body 1 via a bearing BG2, and the inner peripheral surface 6a of the second seat guide 6 is supported via a bearing BG3. The shaft portion 122 of the first rotating body 1 is rotatably supported.

  Thereby, the 1st sheet guide 5, the 2nd sheet guide 6, and the 2nd rotary body 2 (internal board 21) are each supported by shaft part 122 by bearings BG1-BG3 which are mutually different. For this reason, the first sheet guide 5, the second sheet guide 6, and the second rotating body 2 can rotate relative to the first rotating body 1 independently of each other. The diameters of the outer peripheral surfaces 5 b and 6 b of the ring plate portions 51 and 61 of the seat guides 5 and 6 are substantially equal to the diameter of the outer peripheral surface 21 b of the inner plate 21. The diameters of the outer peripheral surfaces 522b and 622b of the arm portions 52 and 62 of the seat guides 5 and 6 are smaller than the diameter of the outer peripheral surface 123a of the accommodating portion SP1 (the inner peripheral surface of the annular portion 123). A gap is provided between the annular portion 123.

  The first plate portion 521 of the first sheet guide 5 includes a narrow portion 521c extending from the outer peripheral surface 5b of the ring plate portion 51 with the same width in the front-rear direction as the ring plate portion 51, and a radially outer side than the narrow portion 521c. And a wide portion 521d whose width in the front-rear direction is increased. The width of the second plate portion 522 in the front-rear direction is equal to the width of the wide portion 521d, for example, the same as the width of the first sheet material 41 in the front-rear direction. As a result, the contact area between the first sheet guide 5 and the first sheet material 41 increases, and the first sheet material 41 can be stably held by the first sheet guide 5. Note that the width of the wide portion 521d and the second plate portion 522 in the front-rear direction may be shorter than the width of the first sheet material 41 in the front-rear direction.

  The first plate portion 621 of the second sheet guide 6 includes a narrow portion 621c extending from the outer peripheral surface 6b of the ring plate portion 61 with the same width in the front-rear direction as the ring plate portion 61, and a radially outer side than the narrow portion 621c. And a wide portion 621d whose width in the front-rear direction is increased. The width of the second plate portion 622 in the front-rear direction is equal to the width of the wide portion 621d, for example, the same as the width of the second sheet material 42 in the front-rear direction. Thereby, the contact area between the second sheet guide 6 and the second sheet material 42 is increased, and the second sheet material 42 can be stably held by the second sheet guide 6. Note that the width in the front-rear direction of the wide portion 621 d and the second plate portion 622 may be shorter than the width in the front-rear direction of the second sheet material 42.

  A characteristic operation of the torque transmission device 100 according to the first embodiment of the present invention will be described. FIG. 10 shows a state where the first rotating body 1 is suddenly decelerated due to the operation of the engine brake by downshifting or the like. Immediately after the downshift, the first rotating body 1 rotates at a high speed and the centrifugal force acting on the sheet material 4 increases, and the intermediate sheet material 43 sticks to the outer peripheral surface 123a of the housing portion SP1. On the other hand, the first sheet material 41 and the second sheet material 42 are held by the first sheet guide 5 and the second sheet guide 6, respectively, and therefore do not stick to the outer peripheral surface 123a. At the time of sudden deceleration of the first rotating body 1, the side end surface 251 of the projecting portion 25 of the second rotating body 2 comes into contact with the end surface 521 b of the first plate portion 521 of the first sheet guide 5, and the pressing surface of the first sheet material 41. A torque T <b> 11 (pressing force) in the R <b> 1 direction acts on 412 through the first sheet guide 5.

  When torque T11 is input to the first sheet material 41, the sheet material 4 is pushed into the side end surface 152 side of the boundary portion 15 while sliding on the outer peripheral surface 123a. As a result, the end surface 621 b of the first plate portion 621 of the sheet guide 6 contacts the side end surface 152 of the boundary portion 15, and the torque T <b> 12 acts on the first rotating body 1. At this time, a pressing force acts on the pressing surfaces 412 and 422 of the sheet materials 41 and 42 via the sheet guides 5 and 6, respectively. For this reason, the spring 3 contracts and the end surfaces of the sheet materials 4 adjacent in the circumferential direction approach or contact each other, and the circumferential direction from the pressing surface 412 of the first sheet material 41 to the pressing surface 422 of the second sheet material 42 is increased. The length is minimized.

  Thereafter, when the accelerator pedal is operated to accelerate the first rotating body 1, the side end surface 251 of the protruding portion 25 of the second rotating body 2 is separated from the first sheet guide 5 as shown in FIG. 11. Further, the second sheet guide 6 comes into contact with the side end face 252 of the protruding portion 25, and torque T13 acts on the second rotating body. At this time, the second sheet guide 6 remains in contact with the side end surface 152 of the boundary portion 15, and the intermediate sheet material 43 remains attached to the outer peripheral surface 123a of the accommodating portion SP1 by centrifugal force, and the biasing force of the spring 3 is applied. Is pushed back while sliding the outer peripheral surface 123a in the direction opposite to the rotation direction of the first rotating body 1 (R2 direction).

  As a result, the second intermediate sheet material 43B is separated from the second sheet material 42, and the second sheet material 42 is attached to the second intermediate sheet material 43B in a stuck state while expanding and contracting the spring 3 (fourth spring 3D). On the other hand, relative movement in the circumferential direction is possible. Therefore, the torque fluctuation between the first rotating body 1 and the second rotating body 2 can be absorbed by the expansion and contraction of the fourth spring 3D, and when the engine brake is operated due to a downshift or the like, The impact caused by the collision with the second rotating body 2 can be reduced. Further, the first sheet material 41 can move relative to the first intermediate sheet material 43A in the circumferential direction while expanding and contracting the spring 3 (first spring 3A). Therefore, torque fluctuations acting on the first sheet material 41 can also be absorbed.

  When the protrusion 25 of the second rotating body 2 is separated from the first sheet guide 5, the first sheet material 41 is separated from the first intermediate sheet material 43A together with the first sheet guide 5 by the urging force of the first spring 3A. It is pushed in the direction (R2 direction). When the distance between the first sheet material 41 and the first intermediate sheet material 43A reaches a predetermined value, the stopper 53 of the first sheet guide 5 comes into contact with the protrusion 432 of the inner peripheral surface 45 of the first intermediate sheet material 43A. Thereby, the movement of the first sheet material 41 in the R2 direction is restricted, and the distance between the first sheet material 41 and the first intermediate sheet material 43A can be kept below a predetermined value. The first spring 3A can be prevented from falling off.

  Similarly, when the distance between the second sheet material 42 and the second intermediate sheet material 43B reaches a predetermined value, the stopper 63 of the second sheet guide 6 is projected on the inner peripheral surface 45 of the second intermediate sheet material 43B. It abuts on the part 432. Thereby, the distance between the 2nd sheet material 42 and the 2nd intermediate sheet material 43B can be kept below a predetermined value, and omission of the spring 32 from sheet materials 42 and 43B can be prevented.

According to 1st Embodiment, there can exist the following effects.
(1) The torque transmission device 100 is configured to transmit torque generated by the engine 101 to the transmission 102 (FIG. 1). The torque transmission device 100 is provided so as to be rotatable about an axis CL0, and is connected to the engine 101. The torque transmitting device 100 is provided so as to be rotatable about the axis CL0 and is connected to the transmission 102. It is arranged in the torque transmission path TP between the rotator 2 and the first rotator 1 and the second rotator 2, and the torque from one of the first rotator 1 and the second rotator 2 is applied to the other. , A spring 3 that absorbs torque fluctuations between the first rotator 1 and the second rotator 2, and the spring 3, the first rotator 1 (boundary portion 15), and the second rotator 2 (protrusions). Between the first rotating body 1 and the second rotating body 2, and the first rotating body 1 and the second rotating body 2 about the axis CL0. And a sheet holding the sheet material 4 so as to be rotatable relative to the And a Togaido 5,6 (Figure 4,5). The first rotating body 1 is an accommodating portion SP1 that accommodates the sheet material 4 so as to be movable in the circumferential direction together with the spring 3, and the outer circumferential surface 123a on the radially outer side of the sheet material 4 and the circumferential movement of the sheet material 4 It has accommodation part SP1 which has side end face 151,152 which regulates (Drawing 5). The sheet material 4 has holding portions 411 and 421 that hold the spring 3 on one end surface in the circumferential direction, and the side end surfaces 151 and 152 of the first rotating body 1 and the side of the second rotating body 2 on the other end surface in the circumferential direction. It has pressing surfaces 412 and 422 to which a pressing force acts from at least one of the end surfaces 251 and 252 (FIGS. 4 and 5). The seat guides 5 and 6 are ring plate portions 51 and 61 rotatably supported by the first rotating body 1 (shaft portion 122) via bearings BG2 and BG3, and radially outward from the ring plate portions 51 and 61. The arm portions 52 and 62 are provided so as to protrude and hold the sheet material 4 so as not to move radially outward (FIGS. 3, 9A, and 9B).

  As described above, the sheet guides 5 and 6 that are rotatably supported by the first rotating body 1 through the bearings BG2 and BG3 and that are connected to the sheet material 4 and hold the sheet material 4 immovably outward in the radial direction are provided. Thus, the sheet materials 41 and 42 to which the pressing force acts from the boundary portion 15 of the first rotating body 1 and the protruding portion 25 of the second rotating body 2 are prevented from sticking to the outer peripheral surface 123a of the accommodating portion SP1. it can. Therefore, the sheet materials 41 and 42 can move in the circumferential direction by the expansion and contraction of the spring 3, and the impact at the time of operating the engine brake due to a downshift or the like can be mitigated.

(2) The sheet material 4 includes a plurality of sheet materials 41 to 43 in the circumferential direction, and one of the sheet materials 41 and 42 arranged adjacent to each other in the circumferential direction includes an arm portion. The sheet guides 5 and 6 are further provided with stoppers 53 and 63 for restricting the relative movement amount of the other sheet material 43 in the circumferential direction with respect to the one sheet material 41 and 42. (FIGS. 10 and 11). Accordingly, the rotation of the sheet guides 5 and 6 with respect to the first rotating body 1 is restricted, and the spring 3 can be prevented from falling off from the sheet material 4.

(3) The sheet material 4 is arranged at both ends in the circumferential direction of the accommodating portion SP1, and the first sheet material 41 to which the torque from the first rotating body 1 is input and the torque input to the first sheet material 41. The second sheet material 42 is output to the second rotating body 2 via the spring 3, and the sheet guide holds the first sheet guide 5 that holds the first sheet material 41 and the second sheet material 42. And a second sheet guide 6 (FIG. 4). Thereby, both the 1st sheet material 41 and the 2nd sheet material 42 will be in the state always spaced apart from the outer peripheral surface 123a of accommodating part SP1. Therefore, the entire sheet material can be moved smoothly.

(4) The sheet material 4 further includes an intermediate sheet material 43 disposed between the first sheet material 41 and the second sheet material 42, and a plurality of springs 3 are connected in series via the intermediate sheet material 43. (FIG. 4). Thereby, the linear spring 3 can be arrange | positioned in circular arc-shaped accommodating part SP1. For this reason, since it is not necessary to bend and form the spring 3, cost can be reduced and the stable spring characteristic can be exhibited. In this case, the intermediate sheet material 43 may stick to the outer peripheral surface 123a of the accommodating portion SP1 due to centrifugal force, but the sheet materials 41 and 42 at both ends in the circumferential direction are separated from the outer peripheral surface 123a. For this reason, the 1st sheet material 41 and the 2nd sheet material 42 can move with respect to the intermediate sheet material 43, and can absorb torque fluctuation satisfactorily.

(5) The arm portions 52 and 62 of the sheet guides 5 and 6 are bent (substantially L-shaped) so as to cover the pressing surfaces 412 and 422 of the sheet materials 41 and 42 and the outer peripheral surface 46 of the sheet materials 41 and 42. (FIGS. 9A and 9B). For this reason, the sheet materials 41 and 42 can be stably held, and the reliability of the operation of the torque transmission device 100 can be ensured.

-Second Embodiment-
A second embodiment of the present invention will be described with reference to FIGS. The second embodiment differs from the first embodiment in the configuration of the seat guide. That is, in the first embodiment, the arm portions 52 and 62 are provided on the sheet guides 5 and 6, and the outer peripheral surfaces 46 of the sheet materials 41 and 42 are covered by the arm portions 52 and 62. However, the second embodiment Then, it comprises so that the internal peripheral surface vicinity of the sheet | seat materials 41 and 42 may be hold | maintained with a sheet | seat guide.

  FIG. 12 is a cross-sectional view showing the main configuration of the torque transmission device 100 according to the second embodiment of the present invention. FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 14B is a plan view of the sheet guides 50 and 60 according to the second embodiment. FIG. 12 corresponds to the cross-sectional shape along the line XII-XII in FIG. 12 to 14B, the same portions as those in FIGS. 1 to 11 are denoted by the same reference numerals, and differences from the first embodiment will be mainly described below.

  As shown in FIG. 14A, the first sheet guide 50 has a plurality of rod-like or wire-like connecting portions protruding in the circumferential direction from the outer peripheral surface 5b of the ring plate portion 51 at equal intervals in the circumferential direction (two in the figure). 54. An engaging portion such as a hook is provided at the tip of the connecting portion 54. Correspondingly, an engagement hole 41a is provided in the vicinity of the inner peripheral surface 45 of the first sheet material 41, and the engagement portion at the tip of the connection portion 54 is fixed to the engagement hole 41a. As a result, the first sheet guide 50 and the first sheet material 41 are integrated. Note that the first sheet guide 50 and the first sheet material 41 may be integrated by welding or the like via the connection portion 54.

  As shown in FIG. 14B, the second sheet guide 60 has a plurality of rod-like or wire-like connecting portions protruding in the circumferential direction from the outer peripheral surface 6b of the ring plate portion 61 at equal intervals in the circumferential direction (two in the drawing). 64. An engaging portion such as a hook is provided at the tip of the connecting portion 64. Correspondingly, an engagement hole 42a is provided in the vicinity of the inner peripheral surface 45 of the second sheet material 42, and the engagement portion at the tip of the connection portion 64 is fixed to the engagement hole 42a. As a result, the second sheet guide 60 and the second sheet material 42 are integrated. Note that the second sheet guide 60 and the second sheet material 42 may be integrated by welding or the like via the connection portion 64.

  As shown in FIGS. 12 and 13, the first sheet material 41 is held by the first sheet guide 50 in a state where the outer peripheral surface 46 is separated from the outer peripheral surface 123 a of the housing portion SP <b> 1, and the second sheet material 42 is 46 is held by the second sheet guide 60 in a state of being separated from the outer peripheral surface 123a of the accommodating portion SP1. For this reason, as in the first embodiment, even if a centrifugal force acts on the first sheet material 41 and the second sheet material 42, the sheet materials 41 and 42 do not contact the outer peripheral surface 123a, and the intermediate sheet material 43 On the other hand, the first sheet material 41 and the second sheet material 42 are movable in the circumferential direction. In the second embodiment, unlike the first embodiment, the pressing surfaces 412 and 422, the side end surfaces 151 and 152 of the boundary portion 15, and the side end surfaces 251 and 252 of the protruding portion 25 are seated during torque transmission. Contact without a guide.

  As described above, according to the second embodiment, the engagement holes 41 a and 42 a held by the connection portions 54 and 64 of the sheet guides 50 and 60 are provided in the vicinity of the inner peripheral surface 45 of the sheet material 41 and 42. (FIGS. 14A and 14B). Thereby, sticking of the sheet materials 41 and 42 to the outer peripheral surface 123a of the accommodating portion SP1 can be suppressed, and an impact at the time of operating the engine brake due to a shift down or the like can be reduced. Further, since the connecting portions 54 and 64 projecting from the outer peripheral surfaces 5b and 6b of the sheet guides 50 and 60 are fixed in the vicinity of the inner peripheral surfaces of the sheet materials 41 and 42, the sheet materials 41 and 42 are held. The guides 50 and 60 can be configured simply.

(Modification)
The above embodiment can be modified into various forms. Hereinafter, modified examples will be described. In the first embodiment, the arm portions 52 and 62 of the sheet guides 5 and 6 are configured to be substantially L-shaped, but are bent so as to cover the pressing surface of the sheet material and the outer peripheral surface of the sheet material. If there is, the arm portion may be configured other than the L-shape. In the second embodiment, the rod-like or wire-like connecting portions 54 and 64 are projected from the outer peripheral surfaces 5b and 6b of the ring plate portions 51 and 61, but the configuration of the connecting portion connected to the sheet material is the same. Not exclusively. That is, a base portion (ring plate portions 51 and 61) rotatably supported by the first rotary body 1 or the second rotary body 2 via bearing portions (bearings BG2 and BG3) and a radially outward projecting from the base portion As long as it has a sheet material holding portion (arm portions 52, 62, connection portions 54, 64) that holds the sheet material 4 so as not to move radially outward, any configuration of the base and the sheet material holding portion is possible. However, the configuration of the sheet material holder is not limited to that described above.

  In the second embodiment, the sheet materials 41 and 42 are held by the sheet guides 50 and 60 via the engagement holes 41a and 42a in the vicinity of the inner peripheral surfaces of the sheet materials 41 and 42. You may comprise the to-be-held part of the sheet | seat material hold | maintained other than a hole. In the above embodiment, the first sheet guides 5 and 50 (first sheet material holder) holding the first sheet material 41 and the second sheet guides 6 and 60 (second sheet material) holding the second sheet material 42 are used. Both the holding body) is provided, but only one of the first sheet material holding body and the second sheet material holding body may be provided.

  In the above-described embodiment, the first rotating body 1 is connected to the engine 101 and the second rotating body 2 is connected to the transmission 102. Conversely, the first rotating body 1 is connected to the transmission 102 and the second rotating body 2 is connected. May be coupled to the engine 101, respectively. In the above embodiment, the spring 3 (coil spring) is disposed between the first rotating body 1 and the second rotating body 2 and torque is transmitted via the spring 3. It is arranged in a torque transmission path between the two rotators, transmits torque from one of the first rotator and the second rotator to the other, and between the first rotator and the second rotator. Any configuration of the elastic body may be used as long as torque fluctuations between the two are absorbed.

  In the above embodiment, a plurality of sheet materials 4 are arranged in the accommodating portion SP1, and the sheets 53 adjacent to each other are provided by the stoppers 53, 63 protruding from the outer peripheral surfaces 5b, 6b of the ring plate portions 51, 61 of the sheet guides 5, 6. Although the relative movement amount in the circumferential direction of the materials 41, 43A and 42, 43B is limited, the configuration of the movement limiting unit that limits the relative movement amount in the circumferential direction of the other sheet material with respect to one adjacent sheet material is as follows. Not limited to this. The number of sheet materials is not limited to that described above as long as the spring is provided between the first rotator and the second rotator so as to be able to contact with and separate from the first rotator and the second rotator. For example, the intermediate sheet material 43 can be omitted. Therefore, you may arrange | position the single spring 3 in accommodating part SP1.

  In the above embodiment, the housing portion SP1 is configured by the front plate 11 and the rear plate 12 (the side plate portion 121, the annular portion 123, and the boundary portion 15) of the first rotating body 1, but the sheet material is exposed radially outward. As long as it has an outer peripheral surface that restricts movement and a pair of side end faces that restrict movement of the sheet material in the circumferential direction, the configuration of the accommodating portion may be anything. In the above embodiment, the holding portions 411, 421, and 431 of the spring 3 which is an example of the elastic body are provided on the sheet material 4, but the shape of the sheet material may be changed to various shapes according to the shape of the elastic body. it can. Therefore, the configuration of the sheet material is not limited to that described above. That is, it has a holding part for holding an elastic body on one end surface in the circumferential direction, and a pressing surface on which the pressing force from at least one of the side end surface of the housing part and the second rotating body acts on the other end surface in the circumferential direction. In this case, the configuration of the sheet material may be any.

  In the above-described embodiment, the first rotating body 1 is provided with the accommodating portions SP1 at two locations in the circumferential direction, but the number of accommodating portions is not limited thereto. For example, the accommodating portions may be provided at three or more locations in the circumferential direction, and the boundary portions of the first rotating body and the protruding portions of the second rotating body may be provided in a number corresponding to this. In the said embodiment, the 2nd rotary body 2 is comprised by the internal plate 21 and the external plate 22, and the 1st sheet | seat material 41 and 2nd which are each arrange | positioned adjacent to a pair of accommodating part SP1 via the boundary part 15 are respectively. The projecting portion 25 as the torque transmitting portion of the second rotating body 2 is arranged between the sheet material 42, but the configuration of the second rotating body is not limited to that described above. For example, you may make it project a protrusion part radially inward from the internal peripheral surface of a ring-shaped board.

  In the above embodiment (FIGS. 2 and 12), the first rotary body 1 is provided with the solid shaft portion 122. For example, as shown in FIG. 15, which is a modified example of FIG. 2, the first rotary body 1 is provided. A substantially cylindrical shaft portion 122A may be provided. That is, a through hole may be opened at the center of the first rotating body 1.

  In the above embodiment, the engine 101 is used as the power source, but other than the engine 101 may be used. Further, the driven body driven by the torque generated by the power source may be other than the transmission 102. That is, the torque transmission device of the present invention can be applied to various torque transmission paths that transmit the torque generated by the power source to the driven body.

  The above description is merely an example, and the present invention is not limited to the above-described embodiments and modifications unless the features of the present invention are impaired. The constituent elements of the embodiment and the modified examples include those that can be replaced while maintaining the identity of the invention and that are obvious for replacement. That is, other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention. Moreover, it is also possible to arbitrarily combine one or more of the above-described embodiments and modified examples. Variations can be combined.

DESCRIPTION OF SYMBOLS 1 1st rotary body, 2nd rotary body, 3 spring, 4 sheet material, 5,50 1st sheet guide, 6,60 2nd sheet guide, 15 boundary part, 25 protrusion part, 41 1st sheet material, 42 Second sheet material, 43 Intermediate sheet material, 51, 61 Ring plate part, 52, 62 Arm part, 54, 64 connection part, 151, 152 side end face, 251, 252 side end face, 411, 421, 431 Spring holding part, 412, 422 Pressing surface, 100 Torque transmission device, 101 Engine, 102 Transmission, SP1 housing part, TP torque transmission path, BG1, BG2, BG3 Bearing

Claims (6)

A torque transmission device for transmitting torque generated by a power source to a driven body,
A first rotating body provided rotatably about an axis and connected to either the power source or the driven body;
A second rotating body provided rotatably about the axis, and connected to one of the power source and the driven body;
It is arranged in a torque transmission path between the first rotating body and the second rotating body, and torque from one of the first rotating body and the second rotating body is transmitted to the first rotating body and the second rotating body. An elastic body that transmits to any one of the rotating bodies and absorbs torque fluctuations between the first rotating body and the second rotating body;
A sheet material provided between the elastic body and the first rotating body and the second rotating body so as to be relatively movable with respect to the first rotating body and the second rotating body;
A sheet material holder that is provided so as to be rotatable relative to the first rotating body and the second rotating body around the axis, and holds the sheet material;
The first rotating body is a storage unit that stores the sheet material together with the elastic body so as to be movable in the circumferential direction, and the outer circumferential surface on the radially outer side of the sheet material and the movement of the sheet material in the circumferential direction. A housing portion having a side end surface to be regulated;
The sheet material has an elastic body holding portion that holds the elastic body on one end surface in the circumferential direction, and the side end surface of the first rotating body and the side end surface of the second rotating body on the other end surface in the circumferential direction. Having a pressing surface to which a pressing force acts from at least one side,
The sheet material holding body is rotatably supported by the first rotating body or the second rotating body via a bearing portion, and protrudes radially outward from the base portion. A torque transmission device comprising: a sheet material holding portion that is held so as not to move outward. The torque transmission device according to claim 1,
The sheet material includes a plurality of sheet materials in the circumferential direction,
Of the one and other sheet materials arranged adjacent to each other in the circumferential direction, the one sheet material is held immovably radially outward by the sheet material holding portion,
The torque transmission device, wherein the sheet material holder further includes a movement limiting unit that limits a relative movement amount of the other sheet material in the circumferential direction with respect to the one sheet material. The torque transmission device according to claim 1,
The sheet material is disposed at each of both ends in the circumferential direction of the accommodating portion, and the first sheet material to which torque from the first rotating body is input and the torque input to the first sheet material are converted into the elastic material. A second sheet material that outputs to the second rotating body through a body,
The torque transmission device, wherein the sheet material holder includes a first sheet material holder that holds the first sheet material, and a second sheet material holder that holds the second sheet material. The torque transmission device according to claim 3,
The sheet material further includes an intermediate sheet material disposed between the first sheet material and the second sheet material,
A plurality of the elastic bodies are connected in series via the intermediate sheet material. In the torque transmission device according to any one of claims 1 to 4,
The torque transmission device, wherein the sheet material holding portion has a bent shape so as to cover the pressing surface of the sheet material and an outer peripheral surface of the sheet material. In the torque transmission device according to any one of claims 1 to 4,
The torque transmission device according to claim 1, wherein the sheet material includes a held portion that is held by the sheet material holding portion in the vicinity of an inner peripheral surface thereof.

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