JP2015169247A - rotation transmitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation transmitting device having a clutch which is connected by fitting a recessed portion and a projecting portion by axially relatively moving two rotating members, and smoothly transmitting torque in switching a rotating direction even when a clearance gap for fitting the projecting portion and the recessed portions is large.SOLUTION: A rotation transmitting device includes a first rotating member 2 provided with a projecting portion 41, a second rotating member 3 provided with a recessed portion 51, a clutch 9 for transmitting or cutting off rotary torque by fitting or releasing the projecting portion 41 and the recessed portion 51 while having clearance gaps S1, S2 in the circumferential direction by axially relatively moving the first rotating member 2 and the second rotating member 3, and clearance adjusting means for reducing the clearance gaps S1, S2. The clearance adjusting means is provided with electromagnets 6, 7 having electromagnetic coils 61, 71 at both sides in the circumferential direction, of the projecting portion 41, and when electric current flows to one or the other of the electromagnetic coils 61, 71, one or the other of the electromagnets 6, 7 makes the projecting portion 41 composed of a magnetic body, be attracted in the circumferential direction, thus the clearance gaps S1, S2 are reduced.

Description

  The present invention relates to a rotation transmission device.

  Conventionally, a rotation transmission device for transmitting rotational torque connects a first rotating member, a second rotating member disposed coaxially with the first rotating member, and the first rotating member and the second rotating member. A clutch for cutting. In this clutch, the first rotating member and the second rotating member relatively move in the axial direction, so that the convex portion protruding radially outward from the outer peripheral surface of the first rotating member is It consists of a so-called dog clutch that engages or disengages in a recess recessed radially inward from the inner peripheral surface and transmits or blocks rotational torque (see Patent Document 1).

  In such a rotation transmission device, the convex portion and the concave portion are provided with a circumferential gap between them in order to facilitate fitting. This gap is set to be small so that torque can be transmitted smoothly without causing a delay in transmission of rotational torque when the rotation direction is switched.

JP 2003-278800 A

  However, since the rotation transmission device described above has a small gap in which the convex portion and the concave portion are fitted, it is difficult to connect the clutch, and the processing of the convex portion and the concave portion requires high precision, resulting in high cost. . Therefore, as a rotation transmission device with reduced costs, there has been a problem that torque transmission can be smoothly performed when the rotation direction is switched even when a gap between the projection and the recess is large.

  The present invention was made to solve such a problem, and has a clutch that is connected when the two rotating members relatively move in the axial direction and the convex and concave portions are fitted, An object of the present invention is to provide a rotation transmission device capable of smoothly performing torque transmission when the rotation direction is switched even when a gap between the projection and the recess is large.

  In order to solve the above-mentioned problem, the structural feature of the rotation transmission device according to claim 1 is that at least a convex portion protruding in a radial direction or an axial direction from one of the outer peripheral surface and the inner peripheral surface is provided in the circumferential direction. A first rotating member provided at one location; a second rotating member provided with a concave portion fitted to the convex portion on the other surface of the outer peripheral surface and the inner peripheral surface; the first rotating member and the second rotating member; By the relative movement of the member in the axial direction, the convex portion and the concave portion are provided with a gap in the circumferential direction so as to be fitted or detached, and rotational torque is transmitted or transmitted by this fitting or separation. A rotation transmission device including a clutch that cuts off the gap, further comprising a gap adjusting means for closing the gap, wherein the gap adjusting means is provided with electromagnets having electromagnetic coils at positions facing both sides in the circumferential direction of the convex portion, respectively. One or the other of each electromagnetic coil When current flows, one or the other of the electromagnets is that by sucking the protrusions made of magnetic material in the circumferential direction stuffing the gaps.

  According to the rotation transmission device of claim 1, when the gap adjusting means for closing the circumferential gap in which the convex portion and the concave portion are fitted flows current to one or the other of each electromagnetic coil, The other consists of attracting a convex portion made of a magnetic material to one or the other in the circumferential direction to close the gap. Thereby, according to this rotation transmission device, when the rotation direction is switched, the gap in the circumferential direction is quickly closed by the gap adjusting means, so that the rotation direction can be adjusted even when the gap between the protrusion and the recess is large. Torque can be transmitted smoothly when switching.

  The rotational transmission device according to claim 2 is characterized in that the first rotation is provided with a convex portion projecting radially or axially from one of the outer peripheral surface and the inner peripheral surface in at least one place in the circumferential direction. A member, a second rotating member having a concave portion fitted to the convex portion provided on the other surface of the outer peripheral surface and the inner peripheral surface, and the first rotating member and the second rotating member relatively relative to each other in the axial direction. Rotation provided with a clutch that causes the convex portion and the concave portion to be fitted or detached with a clearance in the circumferential direction by moving, and to transmit rotational torque or to block the transmission by the fitting or separation. The transmission device further includes a gap adjusting means for closing the gap, and the gap adjusting means is configured such that a permanent magnet is fixed to one end face in the circumferential direction of the convex portion, and an electromagnetic wave is provided at a position facing the permanent magnet in the circumferential direction. An electromagnet having a coil is provided, and the electromagnetic coil On the other hand, when current flows in one direction, the electromagnet attracts the permanent magnet in the circumferential direction to close the gap on one side in the circumferential direction, and the current flows in the other direction opposite to the one direction with respect to the electromagnetic coil. The electromagnet repels the permanent magnet in the circumferential direction and closes the gap on the other side in the circumferential direction.

  According to the rotation transmission device of the second aspect, when the gap adjusting means for closing the circumferential gap in which the convex portion and the concave portion are fitted flows current in one direction with respect to the electromagnetic coil, the electromagnet surrounds the permanent magnet. When the current is applied to the electromagnetic coil in the other direction, the electromagnet repels the permanent magnet in the circumferential direction and closes the gap on the other side in the circumferential direction. Consists of. Thereby, according to this rotation transmission device, when the rotation direction is switched, the gap in the circumferential direction is quickly closed by the gap adjusting means, so that the rotation direction can be adjusted even when the gap between the protrusion and the recess is large. Torque can be transmitted smoothly when switching.

  According to the present invention, the two rotating members move relative to each other in the axial direction and have a clutch connected by fitting the concavo-convex part, and even when the gap between the convex part and the concave part is large Thus, it is possible to provide a rotation transmission device capable of smoothly performing torque transmission when the rotation direction is switched.

1st Embodiment: In the rotation transmission device according to an embodiment of the present invention, it is an axial sectional view schematically showing a state in which a clutch is connected. 1st Embodiment: It is A arrow directional view of FIG. 1, Comprising: The state which the electromagnet is not acting is shown. FIG. 1 is an axial sectional view schematically showing a state in which a clutch is disconnected in the rotation transmission device shown in FIG. First Embodiment: FIG. 2 shows a state in which an electromagnet acts to close one gap. 1st Embodiment: In FIG. 2, the state which the electromagnet acted and closed the other clearance gap is shown. 2nd Embodiment: It is a conceptual diagram explaining the state which sent the electric current to one direction with respect to the electromagnetic coil, and the electromagnet acted and closed one clearance gap. 2nd Embodiment: It is a conceptual diagram explaining the state which sent the electric current to the other direction with respect to the electromagnetic coil, and the electromagnet acted and closed the other clearance gap.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which a rotation transmission device of the present invention is embodied will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is an axial sectional view schematically showing a state in which a clutch 9 is connected in a rotation transmission device 1 according to an embodiment of the present invention. FIG. 2 is a view taken in the direction of arrow A in FIG. 1 and shows a state where the electromagnets 6 and 7 are not acting. FIG. 3 is an axial sectional view schematically showing a state in which the clutch 9 is disconnected in the rotation transmission device 1 shown in FIG.

  The rotation transmission device 1 shown in FIG. 1 includes a first rotating member 2, a second rotating member 3 that is disposed coaxially with the first rotating member 2, and the first rotating member 2 and the second rotating member 3. It mainly includes a clutch 9 that transmits or shuts off rotational torque by moving relatively in the axial direction.

  An annular first clutch plate 4 is connected to the outer periphery of the first rotating member 2 on the second rotating member 3 side (left side in FIG. 1) via a spline 22, and is fixed in the axial direction by a retaining ring 21. . The first clutch plate 4 is formed with a first protrusion 42 that protrudes toward the second rotating member 3 in the axial direction.

  An annular second clutch plate 5 is connected to the outer periphery of the second rotating member 3 on the first rotating member 2 side (right side in FIG. 1) via a spline 32, and is fixed in the axial direction by a retaining ring 31. . The second clutch plate 5 is formed with a second protrusion 52 that protrudes toward the first rotating member 2 in the axial direction. The second protrusion 52 is opposed to the first protrusion 42 on the radially outer side.

  Next, the clutch 9 will be described. As shown in FIGS. 1 and 2, the first clutch plate 4 is provided with convex portions 41 that protrude radially outward from the first protruding portion 42 and are evenly spaced at four locations in the circumferential direction. The second clutch plate 5 is recessed in the radial direction from the inner peripheral surface of the second projecting portion 52 so as to be fitted to the convex portion 41, and is provided with concave portions 51 at four locations in the circumferential direction. Between the convex portion 41 and the concave portion 51, gaps S1 and S2 are provided on both sides in the circumferential direction as well as in the radial direction. The size of the gaps S1 and S2 is, for example, about 1 mm. As a material of the first clutch plate 4 and the second clutch plate 5, for example, iron (SCM material) which is a magnetic material is used.

  The first rotating member 2 and the second rotating member 3 are relatively moved in the axial direction by a shift device (not shown). When the clutch 9 is connected, the convex portion 41 and the concave portion 51 are fitted as shown in FIGS. 1 and 2, and rotational torque can be transmitted between the first rotating member 2 and the second rotating member 3. From this state, the first rotation member 2 and the second rotation member 3 are relatively moved in the axial direction by the shift device, and the clutch 9 is disconnected. At this time, as shown in FIG. 3, the fitting of the convex portion 41 and the concave portion 51 is released, and the transmission of the rotational torque is interrupted between the first rotating member 2 and the second rotating member 3.

  The rotation transmission device 1 further includes a gap adjusting means for closing the circumferential gaps S1 and S2 in which the convex portions 41 and the concave portions 51 are fitted. As the gap adjusting means, as shown in FIG. 2, electromagnets 6 and 7 having electromagnetic coils 61 and 71 wound around an iron core (not shown) are provided on both sides of the convex portion 41 in the circumferential direction. The one side in the circumferential direction is the left side of the convex portion 41 in FIG. 2, and the electromagnet 6 is provided there. The other side in the circumferential direction is the right side of the convex portion 41 in FIG. 2, and the electromagnet 7 is provided there. The electromagnets 6 and 7 are respectively housed and fixed in grooves 53 and 54 that are recessed inward in the radial direction from the outer peripheral surface in the second protrusion 52 of the second clutch plate 5.

  When the electromagnet 6 passes a current through the electromagnetic coil 61, the electromagnet 6 attracts the convex portion 41 by electromagnetic force. On the other hand, the electromagnet 7 attracts the convex portion 41 by an electromagnetic force when a current is passed through the electromagnetic coil 71. The electrical wiring to the electromagnetic coils 61 and 71 fixed to the rotating second clutch plate 5 is made of an electrical wiring member such as a spiral cable or slip ring that enables electrical connection from a power supply source (not shown) to the rotating member. Done with.

  As shown in FIGS. 1 and 2, a magnetic shielding member 8 is provided between the electromagnets 6 and 7 provided with the convex portion 41 interposed therebetween. The magnetic shielding member 8 is housed and fixed in the groove 55 that is recessed inward in the radial direction from the outer peripheral surface to the second protrusion 52 of the second clutch plate 5. As a material of the magnetic shielding member 8, for example, aluminum which is a nonmagnetic material is used. The magnetic shielding member 8 reduces leakage of magnetic flux generated by the electromagnets 6 and 7, respectively. As a result, the electromagnetic force generated by the electromagnets 6 and 7 is increased, and the attractive force for attracting the convex portion 41 is increased.

  Next, the operation by the gap adjusting means will be described. FIG. 4 shows a state in which the electromagnet 6 acts and closes one gap S1 in FIG. FIG. 5 shows a state in which the electromagnet 7 acts to close the other gap S2 in FIG.

  As shown in FIG. 4, in the rotation transmission device 1, the electromagnet 6 attracts the convex portion 41 by flowing a current in one direction with respect to the electromagnetic coil 61. Thereby, the left side 41a of the convex part 41 in FIG. 4 contacts the left side wall 51a of the concave part 51, and the gap S1 is filled.

  As shown in FIG. 5, in the rotation transmission device 1, the electromagnet 7 attracts the convex portion 41 by flowing a current in one direction with respect to the electromagnetic coil 71. Thereby, the right side surface 41b of the convex part 41 in FIG. 5 contacts the right side wall 51b of the concave part 51, and the gap S2 is filled.

  As described above, in the rotation transmission device 1 according to the present embodiment, when the rotation direction is switched, the gap S <b> 1 or the gap S <b> 2 is quickly closed by the gap adjusting means, so that the convex portion 41 and the concave portion 51 are fitted. Even when the gap S1 or the gap S2 to be joined is large, torque transmission when the rotation direction is switched can be performed smoothly.

  In the present embodiment, the magnetic shielding member 8 is provided. However, the present invention is not limited to this. For example, the present invention may be applied to a configuration in which the magnetic shielding member 8 is not provided.

  In the present embodiment, the clutch 9 is configured such that the convex portion 41 and the concave portion 51 are fitted at four locations in the circumferential direction. However, the present invention is not limited to this, and the clutch 9 may be fitted at least at one location in the circumferential direction.

  In the present embodiment, the convex portion 41 of the clutch 9 protrudes in the radial direction and fits into the concave portion 51. However, the present invention is not limited to this, and for example, has a configuration that protrudes in the axial direction and fits into the concave portion 51. You may apply.

  In the present embodiment, the convex portion 41 constituting the clutch 9 projects radially outward from the outer diameter side of the first rotating member 2, and the concave portion 51 extends radially from the inner diameter side of the second rotating member 3. However, the present invention is not limited thereto. For example, the convex portion constituting the clutch protrudes radially inward from the inner diameter side of the first rotating member, and the concave portion is the outer diameter side of the second rotating member. You may apply to the structure which dents inward in radial direction.

Second Embodiment
In the second embodiment, the gap adjusting means of the first embodiment has a configuration in which the electromagnets 6 and 7 are provided on both sides in the circumferential direction of the convex portion 41, and the electromagnet 6 on one side in the circumferential direction of the convex portion 43. It is embodiment which makes it the structure which provides. In the second embodiment, the description of the same configuration as that of the first embodiment is omitted for the sake of brevity.

  FIG. 6 is a conceptual diagram for explaining a state in which a current flows in one direction to the electromagnetic coil 61 and the electromagnet 6 acts to close one gap S1. FIG. 7 is a conceptual diagram illustrating a state in which a current is passed through the electromagnetic coil 61 in the other direction and the electromagnet 6 acts to close the other gap S2.

  As shown in FIG. 6, in the gap adjusting means, a permanent magnet 91 is fixed to one end face in the circumferential direction of the convex portion 43 (left side of the convex portion 43 in FIG. 6). The permanent magnet 91 is arranged such that one side in the circumferential direction (left side in FIG. 6) is an N pole and the other side in the circumferential direction (right side in FIG. 6) is an S pole.

  An electromagnet 6 having an electromagnetic coil 61 wound around an iron core 64, which is a magnetic body, is provided at a position facing the permanent magnet 91 in the circumferential direction. When a current is passed in the direction of the arrow 62 that is one direction with respect to the electromagnetic coil 61, the electromagnet 6 is magnetized to the S pole on the permanent magnet 91 side and to the N pole on the opposite side. At this time, the magnetic flux indicated by the broken line flows from the north pole to the south pole as indicated by an arrow 63. As a result, the S pole of the electromagnet 6 faces the N pole of the permanent magnet 91, and the electromagnet 6 attracts the permanent magnet 91 and the gap S1 is closed.

  On the other hand, as shown in FIG. 7, when a current is passed through the electromagnetic coil 61 in the direction of the arrow 62a which is the other direction, the electromagnet 6 is magnetized to the N pole on the permanent magnet 91 side and to the S pole on the opposite side. At this time, the magnetic flux indicated by the broken line flows from the N pole to the S pole as indicated by the arrow 63a. As a result, the N pole of the permanent magnet 91 and the N pole of the electromagnet 6 are repelled, and the electromagnet 6 repels the permanent magnet 91 and the gap S2 is closed.

  As described above, in the rotation transmission device 1 according to the present embodiment, when the rotation direction is switched, the gap adjusting means quickly closes the circumferential gap S1 or the gap S2, so that the convex portion 43 and the concave portion 51 are fitted. Even when the gap S1 or the gap S2 to be joined is large, torque transmission when the rotation direction is switched can be performed smoothly.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can implement with a various form.

1: rotation transmission device, 2: first rotating member, 3: second rotating member, 4: first clutch plate, 5: second clutch plate, 6, 7: electromagnet, 8: magnetic shielding member, 9: clutch, 21, 31: retaining ring, 22, 32: spline, 41, 43: convex portion, 41a: left side surface, 41b: right side surface, 42: first projecting portion, 51: concave portion, 51a: left side wall, 51b: right side wall 52: second protrusion 53, 54, 55: groove, 61, 71: electromagnetic coil, 62, 62a: current, 63, 63a: magnetic flux, 64: iron core, 91: permanent magnet, S1, S2: gap

Claims (2)

A first rotating member provided with a convex portion projecting in a radial direction or an axial direction from one surface of the outer peripheral surface and the inner peripheral surface at at least one location in the circumferential direction, and a concave portion fitted to the convex portion as an outer peripheral surface The second rotating member provided on the other surface of the inner circumferential surface, the first rotating member, and the second rotating member relatively move in the axial direction, whereby the convex portion and the concave portion are circumferentially moved. In a rotation transmission device provided with a clutch that provides a clearance or disengages this fitting or disengages this fitting and transmits rotational torque by this fitting or disengagement or interrupts this transmission.
A gap adjusting means for closing the gap;
The gap adjusting means is provided with electromagnets having electromagnetic coils at positions facing each other on both sides in the circumferential direction of the convex portion, and when a current is passed through one or the other of the electromagnetic coils, one or the other of the electromagnets A rotation transmitting device, wherein the gap is narrowed by attracting the convex portion made of a magnetic material in the circumferential direction. A first rotating member provided with a convex portion projecting in a radial direction or an axial direction from one surface of the outer peripheral surface and the inner peripheral surface at at least one location in the circumferential direction, and a concave portion fitted to the convex portion as an outer peripheral surface The second rotating member provided on the other surface of the inner circumferential surface, the first rotating member, and the second rotating member relatively move in the axial direction, whereby the convex portion and the concave portion are circumferentially moved. In a rotation transmission device provided with a clutch that provides a clearance or disengages this fitting or disengages this fitting and transmits rotational torque by this fitting or disengagement or interrupts this transmission.
A gap adjusting means for closing the gap;
The gap adjusting means is provided with an electromagnet having a permanent magnet fixed to one end face in the circumferential direction of the convex portion and having an electromagnetic coil at a position facing the permanent magnet in the circumferential direction. When the current flows, the electromagnet attracts the permanent magnet in the circumferential direction to close the gap on one side in the circumferential direction, and the current flows in the other direction opposite to the one direction with respect to the electromagnetic coil. Further, the electromagnet repels the permanent magnet in the circumferential direction and closes the gap on the other side in the circumferential direction.

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