JP5683662B1 - Multi-disc transmission - Google Patents

Abstract

An object of the present invention is to reduce friction and apply a desired pressing force from a pressing roller to a disk. A multi-disc transmission includes an input shaft 10, an output shaft 14, a disc 11, a disc 12, a pair of pressing rollers 40, a speed change actuator 33 that moves the pair of pressing rollers 40, and an arm shaft. The clamp arms 67 and 68 are pressed against the disks 11 and 12 by applying a pressing force to the pair of pressing rollers 40 and are provided at the end of the clamp arm 68 opposite to the side supported by the arm shaft 65. A pressing force adjusting mechanism 32 for applying a force to narrow the gap to the clamp arms 67 and 68, and an end of the clamp arm 68 opposite to the side supported by the arm shaft 65. The ball roller 95 that abuts and supports the clamp arm 68 and a force that reduces the distance between the clamp arms 67 and 68 are generated. Comprises a second actuator 90 which, for. [Selection] Figure 2

Description

  The present invention relates to a multi-disc transmission.

  In Patent Document 1, a primary disk provided on the input shaft and a secondary disk provided on the output shaft are partially overlapped to provide a disk overlap area, and both disks are sandwiched between a pair of pressing rollers in this area. A multi-disc transmission that transmits the rotation of an input shaft to an output shaft by bringing them into contact is disclosed.

  In a multi-disc transmission, a shift is realized by changing a position where a pair of pressing rollers sandwich both discs. That is, if the position between the two disks is close to the input shaft, the gear ratio changes to the low side (large gear ratio side), and if close to the output shaft, the gear ratio changes to the high side (low gear ratio side). .

JP 2010-53995 A

  In the multi-disc transmission described above, the pressing force is applied from the pressing roller to the disc by directly applying the urging force of the spring to the pair of pressing rollers. However, as a structure in which the pressing force is applied from the pressing roller to the disc. For example, a pair of pressing rollers is sandwiched between a pair of arms whose one end is rotatably supported by a rotating shaft, and the distance between the open ends of the pair of arms is reduced, so that It is also possible to adopt a structure in which a pressing force is applied to.

  However, in the above structure, the arm is supported by the pivot shaft in a cantilever manner, so that the moment load corresponding to the weight of the arm concentrates on the contact portion between the arm and the pivot shaft, and the friction increases. In particular, the one attached with the mechanism that narrows the distance between the open ends of the pair of arms is heavier and the friction at the contact portion between the arm and the rotating shaft is also larger, so that the pressing roller is aimed at the disc. In some cases, the pressing force cannot be applied.

  The present invention has been made in view of such technical problems, and an object of the present invention is to reduce friction and to apply a desired pressing force from a pressing roller to a disk.

  According to an aspect of the present invention, there is provided a multi-disc transmission, an input shaft to which rotation from a power source is input, an output shaft disposed in parallel to the input shaft, and the input shaft. A primary disk, a secondary disk provided on the output shaft and having a disk overlapping area overlapping the primary disk, and a pair of pressing rollers disposed on both sides of the primary disk and the secondary disk in the disk overlapping area And a shift actuator for moving the pair of pressing rollers between the input shaft and the output shaft, and a first shaft portion supported by the transmission case so that one end thereof is rotatably supported. The pair of pressing rollers are pressed against the primary disk and the secondary disk by applying a pressing force to the pair of pressing rollers. And an end of one of the pair of arms that is opposite to the side supported by the first shaft, and acts on the pair of arms to reduce the distance between the pair of arms. A pressing force adjusting mechanism that is provided, and a support member that is provided at an end of the one arm opposite to the side that is supported by the first shaft portion and that contacts the transmission case and supports the one arm. There is provided a multi-disc transmission comprising a pressing force adjusting actuator for generating a force for reducing a distance between the pair of arms.

  According to the above aspect, since the arm provided with the pressing force adjusting mechanism is supported by the first shaft portion and the support member by both ends, a moment load is not applied to the contact portion between the arm and the first shaft portion, Friction can be reduced. Therefore, the desired pressing force can be applied to the disk from the pressing roller.

1 is an overall schematic view of a vehicle including a multi-disc transmission. It is the figure which looked at the multi disc transmission from the engine side. FIG. 3 is a bottom view in FIG. 2. It is IV-IV sectional drawing of FIG. It is VV sectional drawing of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is an overall schematic view of a vehicle including a multi-disc transmission according to an embodiment of the present invention.

  The vehicle 1 includes an engine 2 as a power source, a multi-disc transmission (hereinafter referred to as a transmission) 3, left and right drive shafts 4 and 5, and left and right drive wheels 6 and 7.

  The transmission 3 includes a transmission case 9, an input shaft 10, a primary disk 11, a secondary disk 12, a pressing mechanism 13, an output shaft 14, a dry start clutch 15, a reverse gear 16, and a reverse idler gear. 17, an output gear 18, a synchronization mechanism 19, a final gear 20, and a differential gear unit 21.

  The input shaft 10 and the output shaft 14 are arranged in parallel and are rotatably supported by the transmission case 9.

  FIG. 2 is a view of the transmission 3 as viewed from the engine 2 side. FIG. 3 is a bottom view of FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. In addition, about drawing after FIG. 2, a part of member is abbreviate | omitted for description.

  The primary disk 11 is configured by arranging two circular disks 11 a in the axial direction of the input shaft 10 and attaching them to the input shaft 10, and rotates integrally with the input shaft 10. A spacer 22 is provided between the two disks 11 a, and the two disks 11 a are arranged at a predetermined interval in the axial direction of the input shaft 10 by the spacer 22. The primary disk 11 is arranged so that the outer peripheral end of the disk 11 a is close to the output shaft 14. The primary disk 11 rotates with the input shaft 10 in the direction of the arrow in FIG.

  The secondary disk 12 includes a center disk 12a and two side disks 12b provided facing both sides of the center disk 12a. The secondary disk 12 includes a center disk 12 a and a side disk 12 b arranged in the axial direction of the output shaft 14 and attached to the output shaft 14, and rotates integrally with the output shaft 14. A spacer 23 is provided between the center disk 12a and the side disk 12b, and the center disk 12a and the side disk 12b are arranged with a predetermined distance in the axial direction of the output shaft 14 by the spacer 23. The secondary disk 12 is arranged so that the outer peripheral end of the center disk 12 a and the outer peripheral end of the side disk 12 b are close to the input shaft 10.

  The disk 11a of the primary disk 11 is disposed between the center disk 12a of the secondary disk 12 and the side disk 12b. The primary disk 11 and the secondary disk 12 form a disk overlap region where a part of the disk overlaps between the input shaft 10 and the output shaft 14.

  In the disk overlapping area, a gap is formed between the disk 11a of the primary disk 11 and the center disk 12a in a state where the pressing force by the pressing mechanism 13 described in detail below does not act.

  On the other hand, in the situation where the pressing force by the pressing mechanism 13 is applied, the primary disk 11 and the secondary disk 12 are elastically deformed and contacted to form a torque transmission contact portion. In the transmission 3, the transmission of rotation from the input shaft 10 to the output shaft 14 is realized by forming a torque transmission contact portion between the primary disk 11 and the secondary disk 12. The axis connection line O is a line that connects the axis of the input shaft 10 and the axis of the output shaft 14 and is orthogonal to the input shaft 10 and the output shaft 14.

  The pressing mechanism 13 includes a pair of pressing roller mechanisms 30, a pair of disk clamp mechanisms 31, a pressing force adjusting mechanism 32, and a first actuator 33.

  The first actuator 33 moves the pressing roller mechanism 30 along the axis connection line O.

  The first actuator 33 includes an electric motor 34, a ball screw mechanism 35, and a bracket 37.

  One end of the ball screw mechanism 35 is coupled to the rotating shaft of the electric motor 34 and rotates in the forward direction or the reverse direction depending on the rotating direction of the rotating shaft of the electric motor 34. The ball screw mechanism 35 is extended in the direction of the axis connection line O.

  When the ball screw mechanism 35 rotates, the bracket 37 moves along the axial direction of the ball screw mechanism 35, that is, the direction of the axial center connection line O according to the rotation of the ball screw mechanism 35. The bracket 37 is formed with a tapered surface 37a on the surface on the engine 2 side, the distance from the ball screw mechanism 35 becomes shorter toward the electric motor 34 side. When the bracket 37 is reciprocated by the electric motor 34, a push rod (not shown) that follows a tapered surface 37a like a so-called cam follower is reciprocated, and the release lever of the dry start clutch 15 is driven by the push rod. The clutch is engaged and released.

  The bracket 37 is connected to the second support portion 44 and the roller follower support block 48 of the pressing roller mechanism 30 via a first shaft 38 that extends in the direction of the axis connection line O. When the ball screw mechanism 35 is rotated by the electric motor 34, the bracket 37 moves back and forth along the direction of the axis connection line O according to the rotation direction of the ball screw mechanism 35, and the pressing roller mechanism 30 moves to the bracket 37 and the first. It is integrated with the shaft 38 and moves back and forth along the direction of the axis connection line O.

  5 is a cross-sectional view taken along the line VV in FIG.

  The pressing roller mechanism 30 includes a pressing roller 40, a holding portion 41, a pressing roller shaft 42, a first support portion 43, a second support portion 44, a support block 46, and a first roller follower 47.

  The pair of pressing roller mechanisms 30 are disposed on both sides of the primary disk 11 and the secondary disk 12 and are attached to the guide block 49. The guide block 49 is slidably supported by two guide shafts 51 provided between the two guide shaft blocks 50 attached to the transmission case 9 and extending in the direction of the axis connection line O. In other words, the pressing roller mechanism 30 is slidably supported by the guide shaft 51 via the guide block 49, moves in the direction of the axis connection line O by the first actuator 33, and transmits torque to a position corresponding to the target gear ratio. A contact portion is formed.

  The pressing roller shaft 42 extends in a direction intersecting with the direction of the axis connection line O, one end portion 42 a is supported by the first support portion 43, and the other end portion 42 b is supported by the second support portion 44. Is done. The pressing roller shaft 42 has a spherical end portion 42 b supported by the second support portion 44. A holding portion 41 that supports the pressing roller 40 is attached to the pressing roller shaft 42 between the first support portion 43 and the second support portion 44.

  The first support portion 43 is rotatably supported by the guide block 49 via a rotation shaft 52 provided in parallel with the guide shaft 51. The first support portion 43 supports one end portion 42 a of the pressing roller shaft 42 via the needle bearing 53.

  The second support portion 44 supports the other end portion 42 b of the pressing roller shaft 42 via the support block 46 and the needle bearing 54. A bush 55 having a spherical tip 55a is provided between the second support portion 44 and the support block 46 in the axial direction of the input shaft 10, and a gap is provided between the second support portion 44 and the support block 46. Is formed. The gap in the axial direction of the input shaft 10 is positioned closer to the primary disk 11 than the bush 55, and the tip 55 a of the bush 55 contacts the support block 46. The second support portion 44 is connected to the end portion of the second shaft 56 that extends in the direction of the axis connection line O and the direction orthogonal to the axial direction of the input shaft 10 and to which the first roller follower 47 is attached. The second support portion 44 moves in the axial direction of the input shaft 10 by a pressing force applied to the first roller follower 47. According to the movement of the second support portion 44 in the axial direction of the input shaft 10, the first support portion 43 and the holding portion 41 that supports the pressing roller 40 rotate about the rotation shaft 52.

  The first support portion 43 is provided so as to form a gap between the needle bearing 53 and the pressing roller shaft 42 in the direction of the axis connection line O. The end portion 42 b of the pressing roller shaft 42 supported by the second support portion 44 has a spherical shape, and the end portion 42 b is in contact with the needle bearing 54. Accordingly, the pressing roller shaft 42 is supported by the first support portion 43 and the second support portion 44 so as to be rotatable and tiltable with respect to the direction of the axis connection line O.

  The holding portion 41 is provided between the first support portion 43 and the second support portion 44 and is attached to the pressing roller shaft 42. The holding portion 41 rotates and tilts integrally with the pressing roller shaft 42.

  A shaft portion 57 is fixed to the holding portion 41. When the pressing roller shaft 42 is in a direction perpendicular to the axis connection line O when viewed from the axial direction of the input shaft 10, the shaft portion 57 coincides with the axis connection line O. The shaft portion 57 is provided so that the shaft portion 57 inclines with respect to the disk surface in FIG.

  The pressing roller 40 is rotatably supported by the shaft portion 57.

  The pressing roller 40 abuts on the side disk 12b in the disk overlapping region and rotates around the shaft portion 57. When the pressing force transmitted through the first roller follower 47 increases, the pressing roller 40 elastically deforms the disks 11 and 12 to form a torque transmission contact portion.

  The urging force of the springs 60 of the urging portions 45 a and 45 b acts on the pressing roller 40 via the holding portion 41.

  As shown in FIG. 5, in the first roller follower 47, a second shaft 56 connected to the second support portion 44 is inserted into the inner peripheral hole 47a, and the front clamp arm 67 and the rear clamp arm 68 on the side of the disks 11, 12 are arranged. Rolls in contact with the side surfaces 67a and 68a.

  The end of the second shaft 56 opposite to the end connected to the second support portion 44 is inserted into a hole 48 a formed in the roller follower support block 48. The hole 48 a is an oval-shaped hole formed along the axial direction of the input shaft 10. The roller follower support block 48 supports the second shaft 56 slidably in the axial direction of the input shaft 10 along the hole 48a. The roller follower support block 48 is connected to the bracket 37 via a first shaft 38 extending in the direction of the axis connection line O, and moves in the direction of the axis connection line O according to the movement of the bracket 37.

  The disc clamp mechanism 31 includes an arm shaft 65, a front clamp arm 67, and a rear clamp arm 68.

  The arm shaft 65 is a columnar member that extends in a direction perpendicular to the axis connection line O and the input shaft 10. The arm shaft 65 includes an attachment shaft 65a provided in parallel with the input shaft 10, and is supported by the transmission case 9 via two brackets 66 provided at both ends of the attachment shaft 65a. As a result, the arm shaft 65 is provided so as to be orthogonal to the input shaft 10 and overlap the center of the primary disk 11 in the axial direction of the input shaft 10 as shown in FIG.

  The front clamp arm 67 is a plate-like member having an approximately L shape as shown in FIG. The front clamp arm 67 is rotatably supported on the arm shaft 65 on one end side. At the other end of the front clamp arm 67, an engaging portion 72 of a pressing force adjusting mechanism 32 described later is formed. As shown in FIG. 5, the front clamp arm 67 is in contact with the first roller follower 47 at the side surface 67 a (the surface forming the thickness of the plate member) on the side of the disks 11 and 12.

  The rear clamp arm 68 is a plate-like member having an approximately L shape as shown in FIG. The rear clamp arm 68 is rotatably supported on the arm shaft 65 on one end side. The other end of the rear clamp arm 68 is connected to a case 70 of a pressing force adjusting mechanism 32 described later. As shown in FIG. 5, the side surface 68 a (the surface forming the thickness of the plate-like member) of the rear clamp arm 68 contacts the first roller follower 47.

  The front clamp arm 67 and the rear clamp arm 68 are rotated about the arm shaft 65 by the pressing force generated by the pressing force adjusting mechanism 32, and the pressing force is applied to the holding portion 41 by sandwiching the pair of pressing roller mechanisms 30. A pressing force is applied from the pressing roller 40 to the primary disk 11 and the secondary disk 12.

  As shown in FIG. 4, the pressing force adjusting mechanism 32 includes a case 70, a second shaft portion 71, an engaging portion 72, a rotating portion 73, and a compression spring 74.

  The case 70 is connected to the end of the rear clamp arm 68. The case 70 accommodates a part of the rotating part 73, and the second shaft part 71 is attached thereto.

  The second shaft portion 71 is a columnar member parallel to the arm shaft 65, and supports the rotating portion 73 in a rotatable manner.

  As shown in FIG. 2, a rotating shaft 90 a of a second actuator 90 fixed to the transmission case 9 is connected to the rotating unit 73 via a connecting mechanism 91. The coupling mechanism 91 includes two shafts 91a and a slit coupling 91b, and the rotation unit 73 and the rotation shaft 90a of the second actuator 90 are connected to the shaft 91a.

  The slit coupling 91b is formed by forming a plurality of slits in the coupling connecting the two shafts 91a, and the thin portion between the slits is elastically deformed to elastically deform the two shafts 91a, the tensile direction, and the shearing direction. And a member that transmits rotation while allowing relative displacement in the bending direction.

  The rear clamp arm 68 rotates with the arm shaft 65 as a fulcrum by the pressing force generated by the pressing force adjusting mechanism 32. According to the configuration described above, the second actuator 90 is moved within the movable range of the slit coupling 91b. It becomes possible to decenter the rotation shaft 90a and the rotation center axis (second shaft portion 71) of the rotation unit 73 without resistance. That is, even when the rotation shaft 90a of the second actuator 90 and the rotation center axis of the rotation unit 73, that is, the second shaft portion 71 are not on the same straight line, the load applied to the rotation shaft 90a of the second actuator 90 is reduced. The rotation output of the second actuator 90 can be transmitted to the rotation unit 73 without resistance.

  In addition, a ball roller 95 is attached to the lower side of the rotating portion 73 and comes into contact with a contact member 97 disposed in the transmission case 9. As a result, the rear clamp arm 68 is supported by the arm shaft 65 and the ball roller 95 in both ends. A shim 96 is attached between the ball roller 95 and the rotating portion 73 to support the rear clamp arm 68 so that friction caused by twisting does not occur at the contact portion between the rear clamp arm 68 and the arm shaft 65. The height to be adjusted is adjusted.

  Since the pressing force adjusting mechanism 32 is connected to the rear clamp arm 68, when the rear clamp arm 68 is supported by the cantilever only by the arm shaft 65 without the ball roller 95, the pressing force adjusting mechanism 32 and the rear clamp are provided. The moment load corresponding to the weight of the arm 68 is concentrated on the contact portion between the rear clamp arm 68 and the arm shaft 65. Therefore, when the friction of the contact portion is increased and the pressing force is generated by the pressing force adjusting mechanism 32, the rear clamp arm 68 does not rotate, and the pressing force can be applied to the disc from the pressing roller as intended. There are cases where it is not possible.

  On the other hand, in the above configuration, the rear clamp arm 68 is supported by both the arm shaft 65 and the ball roller 95, so that a moment load is not applied to the contact portion between the rear clamp arm 68 and the arm shaft 65. , Friction can be reduced. Therefore, the desired pressing force can be applied to the disk from the pressing roller.

  When the rear clamp arm 68 is supported in a cantilever manner, the displacement due to the bending of the free end of the rear clamp arm 68, that is, the end on the pressing force adjusting mechanism 32 side is increased, and therefore the rear clamp arm 68 is connected to the rotating portion 73 A force that pulls the rotating shaft 90a of the second actuator 90 is generated, and the load on the second actuator 90 increases. On the other hand, in the above configuration, since the rear clamp arm 68 is supported by both ends, the end portion of the rear clamp arm 68 on the pressing force adjusting mechanism 32 side is not displaced by bending, and the rotating portion 73 and Since no force is generated to pull the rotating shaft 90a of the connected second actuator 90, the load on the second actuator 90 can be reduced.

  Further, when the rear clamp arm 68 is supported by both ends, the generation of vibration can be suppressed as compared with the case where the rear clamp arm 68 is supported by cantilever.

  Further, as described above, the rear clamp arm 68 is rotated about the arm shaft 65 by the pressing force generated by the pressing force adjusting mechanism 32, but the ball held by the main body comes into contact with the ball roller 95. Since it rolls freely with respect to the contact member 97, a structure in which the rear clamp arm 68 is supported by both ends can be realized without hindering the rotation of the rear clamp arm 68. The ball roller 95 is coaxial with the rotation center axis (second shaft portion 71) of the rotation portion 73 so that friction does not occur in each movable portion due to moment when the rear clamp arm 68 rotates. Provided.

  The contact member 97 is made of a material having a hardness higher than that of the transmission case 9, for example, carbon steel subjected to heat treatment so as not to be deformed or worn by the load received from the ball roller 95. Thereby, durability is ensured.

  The engaging portion 72 is formed at the end portion of the front clamp arm 67, and extends from the end portion toward the rear clamp arm 68, and the second shaft portion extends from the end portion of the connecting portion 75 on the rear clamp arm 68 side. And a curved surface portion 76 extending so as to surround 71. The curved surface portion 76 has an arc-shaped outer peripheral wall with the second shaft portion 71 as the center. The second roller follower 79 of the rotating portion 73 comes into contact with the outer peripheral wall of the curved surface portion 76 and rolls.

  The rotating unit 73 includes a rotating body 77, a rotation transmission block 78, and a second roller follower 79. The rotating body 77 includes a first body 80 and a second body 81.

  The first body 80 is a substantially U-shaped member extending so as to sandwich the second shaft portion 71. The first body 80 abuts on the outer peripheral wall of the second shaft portion 71 and is supported by the second shaft portion 71 so as to be rotatable and slidable. The first body 80 includes a stopper 82 that supports one end of the compression spring 74 at the end on the open side.

  The rotation transmission block 78 is supported by the second shaft portion 71 so that the second shaft portion 71 passes therethrough and is rotatable. The rotation transmission block 78 supports the end of the compression spring 74 opposite to the end supported by the stopper 82.

  The first body 80 and the second body 81 are joined, and the second roller follower 79 is attached to the second body 81.

  The rotating body 77 is always urged in the direction from the second shaft portion 71 toward the stopper 82 by the restoring force of the compression spring 74. However, the second body 81 located on the opposite side to the compression spring 74 with respect to the second shaft portion 71 abuts on the rotation transmission block 78, and the rotation body 77 moves from the second shaft portion 71 toward the compression spring 74. Is regulated.

  The second roller follower 79 rolls in contact with the arc-shaped outer peripheral wall of the curved surface portion 76. The second roller follower 79 rotates the second shaft portion 71 integrally with the rotary body 77 by the second actuator, and is always biased toward the second shaft portion 71 by the compression spring 74.

  The pressing force adjusting mechanism 32 rotates the second roller follower 79 around the second shaft portion 71 by the second actuator 90, and directs the second roller follower 79 toward the second shaft portion 71 by the compression spring 74. Change the direction of the force applied. Thereby, the force which pushes the front clamp arm 67 to the rear clamp arm 68 side, ie, the pressing force which clamps a pair of pressing roller mechanism 30, can be generated, and can be changed.

  As described above, according to the above aspect, the rear clamp arm 68 is supported by the arm shaft 65 and the ball roller 95 in both ends, so that a moment load is applied to the contact portion between the rear clamp arm 68 and the arm shaft 65. It is not hung and friction can be reduced. Therefore, the desired pressing force can be applied to the disk from the pressing roller. In addition, since the rear clamp arm 68 is supported by both ends, the end of the rear clamp arm 68 on the pressing force adjusting mechanism 32 side is not displaced due to bending, and the second actuator 90 connected to the rotating portion 73 does not move. Since no force for pulling the rotating shaft 90a is generated, the load on the second actuator 90 can be reduced. Furthermore, since the rear clamp arm 68 is supported by both ends, the occurrence of vibration can be suppressed as compared with the case where the rear clamp arm 68 is supported by cantilever (effect corresponding to claim 1).

  The rear clamp arm 68 is rotated about the arm shaft 65 by the pressing force generated by the pressing force adjusting mechanism 32, but the ball roller 95 is in contact with the contact member 97 with which the ball held on the main body abuts. Therefore, it is possible to realize a structure in which the rear clamp arm 68 is supported by both ends without hindering the rotation of the rear clamp arm 68 (effect corresponding to claim 2).

  Further, since a contact member 97 having a hardness higher than that of the transmission case 9 is provided at the contact portion between the ball roller 95 and the transmission case 9, the contact portion is deformed by a load received from the ball roller 95. No durability or wear is ensured (effect corresponding to claim 3).

  The rear clamp arm 68 is rotated about the arm shaft 65 by the pressing force generated by the pressing force adjusting mechanism 32, and the rotating shaft 90a and the rotating portion 73 of the second actuator 90 are connected to the slit coupling 91b. Therefore, the rotation shaft 90a of the second actuator 90 and the rotation center axis (second shaft portion 71) of the rotation portion 73 are connected within the movable range of the slit coupling 91b. It is possible to decenter without resistance. That is, even when the rotation shaft 90a of the second actuator 90 and the rotation center axis of the rotation unit 73, that is, the second shaft portion 71 are not on the same straight line, the load applied to the rotation shaft 90a of the second actuator 90 is reduced. The rotation output of the second actuator 90 can be transmitted to the rotation unit 73 without resistance (effect corresponding to claims 4 and 5).

  The embodiment of the present invention has been described above, but the above embodiment is merely one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

3 Multi-disc transmission (transmission)
2 Engine (Power source)
DESCRIPTION OF SYMBOLS 9 Transmission case 10 Input shaft 14 Output shaft 11 Primary disk 12 Secondary disk 32 Pushing force adjustment mechanism 33 1st actuator (transmission actuator)
40 Pressing roller 65 Arm shaft (first shaft)
67 Front clamp arm (arm)
68 Rear clamp arm (arm)
71 Second shaft portion 90 Second actuator (pressing force adjusting actuator)
90a Rotating shaft 91 Connecting mechanism 91b Slit coupling 95 Ball roller (supporting member)
97 Contact members

Claims (5)

A multi-disc transmission,
An input shaft to which rotation from a power source is input;
An output shaft disposed parallel to the input shaft;
A primary disk provided on the input shaft;
A secondary disk provided on the output shaft and having a disk overlap area overlapping the primary disk;
A pair of pressing rollers disposed on both sides of the primary disk and the secondary disk in the disk overlapping region;
A speed change actuator that moves the pair of pressing rollers between the input shaft and the output shaft;
A pair of arms that are rotatably supported at one end by a first shaft supported by the transmission case, and that press against the primary disk and the secondary disk by applying a pressing force to the pair of pressing rollers; ,
A pressing force that is provided at one end of the pair of arms that is opposite to the side supported by the first shaft portion and that acts on the pair of arms to reduce the distance between the pair of arms. An adjustment mechanism;
A support member that is provided at an end of the one arm opposite to the side supported by the first shaft, and that supports the one arm in contact with the transmission case;
A pressing force adjusting actuator that generates a force that narrows the distance between the pair of arms;
A multi-disc transmission comprising: The multi-disc transmission according to claim 1,
The support member is a ball roller;
A multi-disc transmission characterized by that. The multi-disc transmission according to claim 1 or 2,
The contact portion of the transmission case with the support member is provided with a contact member having higher hardness than the transmission case.
A multi-disc transmission characterized by that. The multi-disc transmission according to any one of claims 1 to 3,
The pressing force adjusting mechanism is rotatably supported by a second shaft portion provided in parallel to the first shaft portion at an end portion of the one arm opposite to the side supported by the first shaft portion. , And a mechanism that changes the force to narrow the distance between the pair of arms according to the rotation angle when rotated by the pressing force adjustment actuator,
A connecting mechanism for connecting the pressing force adjusting actuator and the pressing force adjusting mechanism so that the rotation axis of the pressing force adjusting actuator and the rotation center axis of the pressing force adjusting mechanism can be eccentric;
A multi-disc transmission characterized by that. The multi-disc transmission according to claim 4,
The coupling mechanism includes a slit coupling.
A multi-disc transmission characterized by that.

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