JP2005233256A - Rotation transmitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation transmitting device to work in changing-over between power transmission and shutoff, capable of being structured compactly in its axial direction length. <P>SOLUTION: An engaging piece 9 is installed between a cylindrical surface 7 formed on the periphery of an inner ring 3 of an input side member 1 and a cam face 8 formed on the inside surface of an outer ring 6 and is held by a retainer 10. The input side member 1 is furnished with a cylinder chamber 21 and an oil supplying passage 22, and a piston 23 installed in the cylinder chamber 21 is moved outward by the oil pressure supplied from the passage 22 to the cylinder chamber 21, and the input side member 1 and the retainer 10 are engaged in the rotating direction by giving a press of the piston 23 to the inside surface of the retainer 10, and thereby the engaging piece 9 is engaged with the cylindrical surface 7 and the cam face 8 so that the rotation of the input side member 1 is transmitted to the outer ring 6. The axial direction length of this rotation transmitting device is compacted by installing the piston 23 inside the input side member 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotation transmission device used for switching between transmission and cutoff of power on a power transmission path.

  As this type of rotation transmission device, one described in Patent Document 1 has been conventionally known. This rotation transmission device incorporates a two-way roller clutch between opposing surfaces of an input shaft and an output shaft provided outside thereof, and controls the engagement and disengagement of the two-way roller clutch by a rotation control mechanism. ing.

  Here, the two-way roller clutch has a clutch inner ring fitted to the input shaft and prevented from rotating, and a clutch outer ring fitted to the output shaft. The clutch inner ring includes a cylindrical inner surface of the clutch outer ring, A plurality of cam surfaces forming a wedge-shaped space between them are provided at equal intervals in the circumferential direction, and rollers are incorporated between the cam surfaces and the cylindrical inner surface of the outer ring of the clutch, and the elastic force of the switch spring on the cage that holds each roller The retainer is elastically held in a neutral position where the roller is disengaged from the cylindrical inner surface and the cam surface, and the roller is moved to the cylindrical inner surface and the cam surface by the relative rotation of the retainer and the input shaft. It is made to engage.

On the other hand, the rotation control mechanism incorporates a friction plate, an engagement plate, and a piston between the two-way roller clutch and the bearing support ring attached to the input shaft, and holds the engagement plate in the two-way roller clutch. The piston is moved toward the two-way roller clutch by supplying pressure oil to the cylinder chamber formed between the piston and the bearing support ring, and the engagement plate is moved to the friction plate by the piston. A rotational resistance is applied to the cage by pressing, and the roller is engaged with the cylindrical inner surface and the cam surface by the relative rotation of the cage and the input shaft.
JP 2002-340023 A

  By the way, in the rotation transmission device described in Patent Document 1, the rotation control mechanism that controls on / off of the two-way roller clutch includes a cylinder chamber between the friction plate, the engagement plate, the piston, and the piston. Since the rotation control mechanism is arranged in the axial direction with respect to the two-way roller clutch, the rotation transmission device is long in the axial direction. It is necessary to secure a large space for assembling, and there are points to be improved in order to make the axial length compact.

  An object of the present invention is to provide a rotation transmission device having a compact axial length, a small number of parts, and a low cost.

  In order to solve the above-described problems, in the first invention, the input side member and the output side member are disposed inside and outside and supported relatively rotatably, and on the opposing surfaces of the input side member and the output side member. A cylindrical surface is formed on one side, and a cam surface is formed on the other side to form a wedge-shaped space between the cylindrical surface. An engagement element is assembled between the cam surface and the cylindrical surface, and the engagement element is output to the input side member. The cage is held in a neutral position where it is held by a cage assembled between the side members, and the engagement element is disengaged by the elastic holding means incorporated between the cage and the cam surface. The elastic holding is performed, the friction resistance is applied between the member having the cylindrical surface formed by the frictional resistance applying means and the cage, and the engagement element is moved to the cylindrical surface by the relative rotation of the member having the cam surface and the cage. In the rotation transmission device adapted to be engaged with the cam surface, The frictional resistance applying means includes a cylinder chamber formed in the member having the cylindrical surface, an oil supply passage communicating with the cylinder chamber, and an oil pressure supplied from the oil supply passage to the cylinder chamber. The structure which consists of the piston which moves to a direction and presses the surrounding surface of a holder | retainer was employ | adopted.

  In the rotation transmission device configured as described above, when hydraulic pressure is supplied to the cylinder chamber, the piston moves outward and presses the circumferential surface of the cage, so that it is held by the frictional resistance acting on the pressing surface of the piston and the cage. The cage and the member having the cylindrical surface are engaged in the rotation direction, and the cage and the member having the cam surface are rotated relative to each other so that the engagement element is engaged with the cylindrical surface and the cam surface. The power is transmitted between the input side member and the output side member.

  Here, even if the supply of hydraulic pressure to the cylinder chamber is stopped, that is, when the clutch is idling, if the piston is in contact with the peripheral surface of the cage, the cage and the cam surface connected by the elastic holding means There is a risk of mis-engagement due to relative rotation with the member having the. In order to prevent the occurrence of such inconvenience, it is preferable to provide a return spring for returning the piston in the frictional resistance applying means.

  In the second aspect of the invention, the input side member and the output side member are disposed inside and outside and are relatively rotatably supported, and a cylindrical surface is formed on one of the opposing surfaces of the input side member and the output side member. In addition, a cam surface that forms a wedge-shaped space between the cylindrical surface is provided on the other side, an engagement element is incorporated between the cam surface and the cylindrical surface, and the engagement element is incorporated between the input side member and the output side member. The cage is held by a cage, and the cage is elastically held at a neutral position where the engagement element is disengaged by elastic holding means incorporated between the cage and the cam surface. Friction resistance is imparted between the member having the cylindrical surface formed by the means and the cage, and the engaging element is engaged with the cylindrical surface and the cam surface by relative rotation of the member having the cam surface and the cage. In the rotation transmission device, the frictional resistance applying means is A friction plate that is prevented from rotating with respect to the cage and supported so as to be movable in the axial direction; a rotor that is attached to the member on which the cylindrical surface is formed and that faces the friction plate in the axial direction; and the cam surface A configuration comprising pressing means that is incorporated in the formed member and presses the friction plate against the rotor is employed.

  In the rotation transmission device according to the second invention, as the pressing means, a cylinder chamber formed on a surface of the member having a cam surface facing the friction plate, an oil supply passage communicating with the cylinder chamber, and the cylinder chamber It is possible to employ a piston that is incorporated in the piston and moves toward the friction plate by the hydraulic pressure supplied from the oil supply passage to the cylinder chamber.

  In the rotation transmission device configured as described above, when hydraulic pressure is supplied to the cylinder chamber of the pressing means, the piston moves outward to press the friction plate against the rotor. The cage is engaged with the member having the cylindrical surface in the rotational direction by the frictional resistance acting on the pressure contact surface of the friction plate and the rotor, and the member having the cage and the cam surface connected by the elastic holding means By relative rotation, the engaging element engages with the cylindrical surface and the cam surface, and power is transmitted between the input side member and the output side member.

  Here, if the friction plate and the rotor are kept in contact with each other when the supply of hydraulic pressure to the cylinder chamber is stopped, the cage connected by the elastic holding means and the member having the cam surface rotate relative to each other. There is a risk of engagement. In order to prevent such inconvenience, it is preferable to incorporate a separation spring that separates the friction plate from the rotor in the pressing means.

  In the rotation transmission device according to the first and second inventions, as an elastic holding means for elastically holding the cage with respect to a member having a cam surface, a protrusion provided on an end surface of the cage, and the protrusion What consists of a pair of elastic member provided in the both sides of the holder | retainer circumferential direction of a part is employable. A coil spring can be used as the elastic member.

  In the rotation transmission device according to the first aspect of the present invention, a cylinder chamber is formed in the member having the cylindrical surface, and the piston incorporated in the cylinder chamber is pressed against the peripheral surface of the cage, and the member having the cylindrical surface; Since frictional resistance is imparted between the cages, a compact rotation transmission device having an axial length can be obtained.

  Further, since the frictional resistance imparting means has a simple configuration with a small number of parts in which a piston is incorporated in the cylinder chamber, a low-cost rotation transmission device can be obtained.

  In the rotation transmission device according to the second aspect of the present invention, the pressing means for pressing the friction plate against the rotor to give a frictional resistance between the member having the cylindrical surface and the cage is incorporated in the member having the cam surface. Therefore, a compact rotation transmission device having an axial length can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment of a rotation transmission device according to the present invention. As shown in FIGS. 1 to 4, the input side member 1 includes an input shaft 2 and an inner ring 3 fitted outside the input shaft 2, and the input shaft 2 and the inner ring 3 are prevented from rotating by a serration 4. Has been.

  The inner ring 3 has small diameter portions 3a at both ends, and an outer ring 6 as an output side member is rotatably supported by bearings 5 attached to the small diameter portions 3a.

  A cylindrical surface 7 is provided on the outer periphery of the inner ring 3. On the other hand, a plurality of cam surfaces 8 forming a wedge-shaped space between the outer ring 6 and the cylindrical surface 7 are formed at equal intervals in the circumferential direction, and a roller is provided between each cam surface 8 and the cylindrical surface 7. An engaging member 9 is incorporated.

  The engaging element 9 is held by a cage 10 incorporated between the inner ring 3 and the outer ring 6.

  Between the cage 10 and the outer ring 6, there is provided an elastic holding means A that elastically holds the cage 10 in a neutral position where the engagement element 9 is disengaged from the cylindrical surface 7 and the cam surface 8. .

  The elastic holding means A is provided with a pair of projecting portions 11 on one end face of the cage 10 at opposing positions, and each projecting portion 11 is inserted into an arc-shaped elongated hole 12 formed in the end plate 6 a of the outer ring 6. The coil spring 13 as an elastic member is incorporated between the end face facing the circumferential direction of the long hole 12 and the protruding portion 11.

  As shown in FIGS. 1 and 2, the input side member 1 is provided with friction resistance applying means 20 that applies frictional resistance to the cage 10 and engages the input side member 1 and the cage 10 in the rotational direction. ing.

  The frictional resistance applying means 20 is provided with a plurality of cylinder chambers 21 extending radially in the inner ring 3 and opening on the outer peripheral surface of the inner ring at equal intervals in the circumferential direction, and an oil supply passage 22 communicating with each cylinder chamber 21 on the input shaft 2. The piston 23 is slidably incorporated in each cylinder chamber 21, and the piston 23 is moved radially outward of the inner ring 3 by the hydraulic pressure supplied from the oil supply passage 22 to the cylinder chamber 21. The distal end surface of 23 is pressed against the inner peripheral surface of the cage 10.

  The piston 23 is provided with a slit 24 on the outer periphery of the tip located outside the cylinder chamber 21, and both ends of a return spring 25 made of a leaf spring attached to the outer periphery of the inner ring 3 are engaged with the slit 24. The return spring 25 urges the piston 23 in a direction away from the inner peripheral surface of the cage 10.

  The rotation transmission device shown in the first embodiment has the above-described structure. Now, when hydraulic pressure is supplied from the oil supply passage 22 to the cylinder chamber 21 in a state in which the input side member 1 rotates in one direction, the piston 23 returns to the return spring. As shown in FIG. 5, the distal end surface presses the inner peripheral surface of the cage 10. Due to the frictional resistance acting on the pressing surface, the cage 10 tries to rotate together with the input side member 1. At this time, since the cage 10 rotates relative to the outer ring 6, as shown in FIG. 6, the engaging element 9 engages with the cylindrical surface 7 and the cam surface 8, and the rotation of the input side member 1 rotates the engaging element 9. Is transmitted to the outer ring 6 via.

  When the cage 10 rotates relative to the outer ring 6, one of the pair of coil springs 13 shown in FIG. 4 expands and the other coil spring 13 compresses and deforms.

  When the supply of hydraulic pressure to the oil supply passage 22 is cut off, the piston 23 moves in a direction away from the inner peripheral surface of the cage 10 by the restoring elasticity of the return spring 25 shown in FIG. The engagement in the rotation direction is released. Further, the retainer 10 is returned and rotated by the restoring elasticity of the coil spring 13 shown in FIG. 4, and the engagement element 9 is released from the engagement with the cylindrical surface 7 and the cam surface 8 and returned to the neutral position. The outer ring 6 can be rotated relative to the outer ring 6.

  In the rotation transmission device shown in the first embodiment, a piston 23 is incorporated in a cylinder chamber 21 formed in the inner ring 3, and the piston 23 is moved outward by supplying hydraulic pressure to the cylinder chamber 21, thereby holding the cage. Since the friction resistance is applied to the cage 10 by pressing the tip end surface of the piston 23 against the inner peripheral surface of the shaft 10, a compact rotation transmission device having an axial length can be obtained.

  In addition, since the frictional resistance applying means 20 that applies the frictional resistance to the cage 10 has a simple configuration with a small number of parts consisting of only the piston 23, a low-cost rotation transmission device can be obtained.

  In the first embodiment, the cylindrical surface 7 is provided on the outer periphery of the inner ring 3 and the cam surface 8 is provided on the inner periphery of the outer ring 6. However, the cam surface is provided on the outer periphery of the inner ring 3 and the cylindrical surface is provided on the inner periphery of the outer ring 6. 7 may be formed. In this case, an elastic holding means A for holding the engaging element 9 in a neutral position is incorporated between the inner ring 3 and the cage 10, and a cylinder chamber and an oil supply passage are formed in the outer ring 6, and the slide incorporated in the cylinder chamber. The movable piston is movable toward the outer peripheral surface of the cage 10.

  7 and 8 show a second embodiment of the rotation transmission device according to the present invention. In this embodiment, the input side member 30 and an outer ring 31 as an output side member provided outside the input side member 30 are relatively rotatably supported by the bearing 50, and the large diameter portion 30 a provided in the input side member 30 is formed. A plurality of cam surfaces 33 forming a wedge-shaped space between the outer periphery 31 and the cylindrical surface 32 formed on the inner periphery of the outer ring 31 are provided at equal intervals in the circumferential direction, and are incorporated between the cam surfaces 33 and the cylindrical surface 32. A switch spring as an elastic holding means A is held by a retainer 35 incorporated between the large-diameter portion 30a and the outer ring 31, and the retainer 35 is retained by the end face of the large-diameter portion 30a. The retainer 35 is elastically held at a neutral position where the engagement element 34 is disengaged from the cylindrical surface 32 and the cam surface 33 by applying an elastic force 36.

  Here, the switch spring 36 has a C shape, and both ends thereof are provided with outwardly pressing pieces 36a. The switch spring 36 is assembled in a spring housing recess 37 formed on the end surface of the large diameter portion 30 a, and the pair of pressing pieces 36 a is formed on the end surface of the cage 35 from a notch 38 formed on the outer peripheral wall of the spring housing recess 37. It is inserted into the notch 39 provided and presses the opposite end surfaces in the circumferential direction of the notch 38 and the notch 39 in opposite directions.

  Further, a frictional resistance applying means 40 for applying a frictional resistance to the cage 35 is provided between the outer ring 31 and the cage 35.

  The frictional resistance imparting means 40 includes a connecting plate 41, a friction plate 42, a rotor 43, a pressing means 44 that presses the friction plate 42 against the rotor 43, and a separation spring 45 that separates the friction plate 42 from the rotor 43.

  The connecting plate 41 is fitted into the end portion of the cage 35, and an L-shaped engagement piece 41 a provided at an opposing position on the outer periphery is fitted into the notch 39 formed at the end portion of the cage 35. The connecting plate 41 is locked to the retainer 35 by the engagement of the engagement piece 41 a with the notch 39.

  The friction plate 42 is opposed to the connecting plate 41 in the axial direction, and an engagement piece 41a of the connecting plate 41 is engaged with an engagement hole 42a formed in the friction plate 42, whereby the friction plate 42 is retained by the cage. It is prevented from rotating with respect to 35 and is movable in the axial direction.

  The rotor 43 faces the friction plate 42 in the axial direction, and a separation spring 45 is incorporated between the rotor 43 and the friction plate 42. The rotor 43 has a cylindrical portion 43 a on the outer periphery, and is coupled to the outer ring 31 by fitting the cylindrical portion 43 a to the opening end portion of the outer ring 31.

  The pressing means 44 forms a plurality of axially extending cylinder chambers 46 at equal intervals in the circumferential direction on the end face of the large-diameter portion 30 a of the input side member 30, and the input side member 30 is lubricated to communicate with each cylinder chamber 46. A passage 47 is provided, and a slidable piston 48 incorporated in the cylinder chamber 46 is moved outward by the hydraulic pressure supplied from the oil supply passage 47 into the cylinder chamber 46. The piston 48 causes the friction plate 42 to move to the rotor. 43 is pressed.

  Here, the piston 48 is moved back by a separation spring 45 and a return spring 49 incorporated in the cylinder chamber 46.

  The rotation transmission device shown in the second embodiment has the above-described structure. When the input side member 30 rotates, the rotation is transmitted to the cage 35 via the switch spring 36, and the cage 35 and the engagement element 34 are input. It rotates with the side member 30.

  When the oil pressure is supplied from the oil supply passage 47 to the cylinder chamber 46 in the rotation state of the input side member 30, the piston 48 moves outward and presses the friction plate 42. For this reason, the friction plate 42 moves against the elasticity of the separation spring 45 to press the rotor 43, and the frictional resistance acting on the pressing surface becomes the rotational resistance of the cage 35. It rotates relative to the member 30. Due to the relative rotation of the input side member 30 and the cage 35, the engagement element 34 is engaged with the cylindrical surface 32 and the cam surface 33, and the rotation of the input side member 30 is transmitted to the outer ring 31 via the engagement element 34.

  Further, the switch spring 36 is elastically deformed by the relative rotation of the input side member 30 and the cage 35.

  When the hydraulic pressure supply to the cylinder chamber 46 is cut off, the friction plate 42 is separated from the rotor 43 by the pressing of the separation spring 45, and the piston 48 is retracted by the separation spring 45 and the return spring 49 to release the pressing of the friction plate 42. To do.

  Further, due to the restoring elasticity of the switch spring 36, the retainer 35 rotates and the engaging element 34 is returned to the neutral position, and the engagement of the cylindrical surface 32 and the cam surface 33 releases the power from the input side member 30 to the outer ring 31. Transmission is interrupted.

  In the rotation transmission device in the second embodiment, the piston 48 of the pressing means 44 that presses the friction plate 42 against the rotor 43 is incorporated into the cylinder chamber 46 formed on the end face of the large diameter portion 30a. A compact rotation transmission device can be obtained.

  In the second embodiment, the cylindrical surface 32 is formed on the inner periphery of the outer ring 31, and the cam surface 33 is formed on the outer periphery of the large-diameter portion 30 a of the input side member 30, but the cam surface is formed on the inner periphery of the outer ring 31. And you may make it provide a cylindrical surface in the outer periphery of the large diameter part 30a.

  In this case, a switch spring is incorporated between the outer ring 31 and the cage 35 to hold the engaging element 34 in the neutral position. Further, the rotor 43 is fixed to the input side member 30, the cylinder chamber 46 and the oil supply passage 47 are provided in the outer ring 31, and the piston 48 is incorporated in the cylinder chamber 46.

1 is a longitudinal front view showing a first embodiment of a rotation transmission device according to the present invention. Sectional view along the line II-II in FIG. Sectional view along line III-III in FIG. Right side view of FIG. Sectional drawing of the state which made the piston press-contact to the holder | retainer of the rotation transmission apparatus shown in FIG. Sectional drawing which shows the engagement state of the engagement element of the rotation transmission apparatus shown in FIG. Longitudinal front view showing a second embodiment of the rotation transmission device according to the present invention Sectional view along line VIII-VIII in FIG.

Explanation of symbols

1 Input side member 6 Outer ring (Output side member)
7 cylindrical surface 8 cam surface 9 engagement element 10 cage 13 coil spring 20 frictional resistance applying means 21 cylinder chamber 22 oil supply passage 23 piston 25 return spring 30 input side member 31 outer ring (output side member)
32 cylindrical surface 33 cam surface 34 engagement element 35 retainer 36 switch spring 40 friction resistance applying means 42 friction plate 43 rotor 44 pressing means 45 separation spring 46 cylinder chamber 47 oil supply passage 48 piston

Claims (7)

  The input side member and the output side member are arranged inside and outside and are relatively rotatably supported. A cylindrical surface is formed on one of the opposing surfaces of the input side member and the output side member, and between the cylindrical surface on the other side. A cam surface forming a wedge-shaped space is provided, and an engagement element is assembled between the cam surface and the cylindrical surface, and the engagement element is held by a cage incorporated between the input side member and the output side member. And a member in which the retainer is elastically held in a neutral position where the engagement element is disengaged by elastic holding means incorporated between the cam member and the cam surface, and a cylindrical surface is formed by the frictional resistance applying means. In the rotation transmission device in which frictional resistance is applied between the cage and the cage, and the engagement element is engaged with the cylindrical surface and the cam surface by relative rotation of the member on which the cam surface is formed and the cage. A resistance applying means is formed on the member having the cylindrical surface. A cylinder chamber formed therein, an oil supply passage communicating with the cylinder chamber, and a piston that is incorporated in the cylinder chamber and moves outward by the hydraulic pressure supplied from the oil supply passage to the cylinder chamber and presses the peripheral surface of the cage A rotation transmission device comprising:   The rotation transmission device according to claim 1, wherein the frictional resistance applying means includes a return spring for returning the piston.   The input side member and the output side member are arranged inside and outside and are relatively rotatably supported. A cylindrical surface is formed on one of the opposing surfaces of the input side member and the output side member, and between the cylindrical surface on the other side. A cam surface forming a wedge-shaped space is provided, and an engagement element is assembled between the cam surface and the cylindrical surface, and the engagement element is held by a cage incorporated between the input side member and the output side member. And a member in which the retainer is elastically held in a neutral position where the engagement element is disengaged by elastic holding means incorporated between the cam member and the cam surface, and a cylindrical surface is formed by the frictional resistance applying means. In the rotation transmission device, a frictional resistance is applied between the cage and the cage, and the engagement element is engaged with the cylindrical surface and the cam surface by relative rotation between the member on which the cam surface is formed and the cage. The resistance applying means is prevented from rotating with respect to the cage, A friction plate supported movably in one axial direction, a rotor attached to the member formed with the cylindrical surface and opposed to the friction plate in the axial direction, and a member formed with the cam surface. And a rotation means for pressing the friction plate against the rotor.   The pressing means is incorporated in the cylinder chamber formed on the surface of the member having a cam surface facing the friction plate, the oil supply passage communicating with the cylinder chamber, and supplied from the oil supply passage to the cylinder chamber. The rotation transmission device according to claim 3, further comprising a piston that moves toward the friction plate by hydraulic pressure.   The rotation transmission device according to claim 4, wherein the pressing means includes a separation spring that separates the friction plate from the rotor.   The said elastic holding means consists of a protrusion part provided in the end surface of a holder | retainer, and a pair of elastic member provided in the both sides of the holder | retainer circumferential direction of the protrusion part. Rotation transmission device.   The rotation transmission device according to claim 6, wherein the elastic member is a coil spring.

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