JP5724978B2 - clutch - Google Patents

Description

  The present invention relates to a clutch that switches a power transmission state of a driving side rotating body and a driven side rotating body by connecting or releasing the connection.

  In recent years, for the purpose of reducing the friction of an internal combustion engine or the like, a clutch provided between a crankshaft and an auxiliary machine has been proposed (Patent Document 1, etc.). The clutch described in Patent Document 1 includes a drive-side rotator that is connected to a crankshaft and rotates, and a driven-side rotator that is connected to an auxiliary machine and provided to be relatively rotatable with the drive-side member. The clutch is maintained in the connected state by pressing the rotating body by the magnetic force of the magnet. Further, energization control is performed on a coil provided in the clutch, and a magnetic field that cancels the magnetic force is generated, so that the clutch can be disconnected.

JP 2010-203406 A

  By the way, as in Patent Document 1, when the driving-side rotator and the driven-side rotator are brought into pressure contact with each other so that the clutch is in a coupled state, the coupling torque, in other words, a device that is rotationally driven by the driven-side rotator The larger the required torque, the larger the pressure contact force is required. And if a magnet is enlarged in order to enlarge a press-contact force, the coil for negating the magnetic force will also become large in connection with it. As a result, the clutch may be increased in size.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a clutch capable of switching a power transmission state while suppressing an increase in size even when a coupling torque is large. .

A clutch for solving the above-described problems is a drive-side rotator and a first position connected to the drive-side rotator by moving along the axial direction of the drive-side rotator and the drive-side rotator A driven-side rotator that can be displaced to the second position where the connection is released, and a biasing member that urges the driven-side rotator from the second position toward the first position. Then, in such a clutch, the driven-side rotator to form a spiral groove extending in the biasing direction of the biasing member, so that with inserts available-pin in the spiral groove.

In the above configuration, the driven side rotating body is biased toward the first position by the biasing force of the biasing member. When the driven-side rotator is in the first position, the drive-side rotator and the driven-side rotator are connected. Further, a spiral groove extending in the biasing direction of the biasing member is formed in the driven side rotating body. When pin is inserted into the spiral grooves of the driven-side rotator in a rotational state, by a pin and helical groove sliding contact, part of the torque of the driven-side rotating member is in the axial direction of the driven-side rotating member Converted into force. When this force becomes larger than the urging force by the urging member, the driven-side rotator moves in the axial direction against the urging force, and the position is displaced from the first position to the second position. As a result, the connection between the driving side rotating body and the driven side rotating body is released.

  Therefore, according to the above configuration, the force required to release the clutch can be obtained from the rotational force of the driven-side rotating body. Therefore, the clutch can be enlarged even when the coupling torque is large. The power transmission state can be switched while being suppressed.

In the clutch, it is desirable that the spiral groove is formed on the outer peripheral surface of the driven-side rotator and is formed in a stepped shape with a diameter reduced toward the front side in the urging direction.
According to such a configuration, the length in the axial direction of the portion where the spiral groove is formed in the driven side rotating body can be shortened, and the enlargement of the clutch can be more suitably suppressed.

  Further, in the clutch, the spiral groove is connected to a linear groove that is provided on the front side in the biasing direction with respect to the spiral groove and extends in the circumferential direction of the driven-side rotating body, and the driven-side rotating body is in the second position. It is preferable to adopt a configuration in which the pin is in sliding contact with the straight groove when moved.

  As described above, when the pin is inserted into the spiral groove, the driven side rotating body moves in the axial direction. When the amount of movement of the driven-side rotator increases and the driven-side rotator reaches the second position, the connection between the drive-side rotator and the driven-side rotator is released. However, since the driven-side rotator may maintain the rotation state due to its inertia, there is a risk that the movement in the axial direction may continue until the rotation stops.

  In the above configuration, when the pin is guided from the spiral groove to the linear groove and comes into sliding contact, the rotational force of the driven rotator is not converted into axial force. It does not move in the direction. Therefore, the movement of the driven-side rotator in the axial direction after the connection between the drive-side rotator and the driven-side rotator is released can be restricted, and the length of the clutch in the axial direction can be shortened. Can be saved.

  The clutch includes a sphere that mediates the connection between the driven-side rotator and the drive-side rotator. When the driven-side rotator moves to the first position, the sphere is connected to the driven-side rotator. While the two rotating bodies are coupled to be non-rotatable between the driving side rotating body and the driven side rotating body is moved to the second position, the spherical body is moved to the driven side rotating body and the driving side rotating body. It is preferable to adopt a configuration in which the connection between both rotating bodies is released so as to be rotatable between the two.

According to such a configuration, unlike a crimping clutch, for example, it is possible to transmit a larger torque without increasing the size.
In the above clutch, the solenoid switches the insertion and withdrawal of the pin into and from the spiral groove, and the solenoid switches the insertion state and the withdrawal state of the pin by energizing the coil. It is preferable to employ a self-holding solenoid that maintains the state.

  According to such a configuration, it is only necessary to energize the coil only when the power transmission state of the clutch is switched, so that the power consumption of the solenoid can be reduced.

Sectional drawing in one Embodiment of a clutch. The side view of a slide piece. The perspective view of a slide piece. The cross-sectional perspective view of the groove part in a slide piece. The perspective view of the slide piece of the state to which the holder | retainer was fixed. (A) is a figure when a clutch is in a connected state, (b) is a figure when a clutch is in a released state. The side view which shows the whole structure of the clutch of the embodiment. (A), (b) is sectional drawing of the solenoid employ | adopted in the embodiment. (A)-(f) is a figure which shows operation | movement of a clutch.

  Hereinafter, an embodiment embodying a clutch will be described with reference to FIGS. The present embodiment shows a clutch that is provided between a crankshaft and an air compressor (hereinafter referred to as an air conditioner) and switches its power transmission state.

  As shown in FIG. 1, the clutch includes a pulley 10 and a slide piece 20. The pulley 10 corresponds to a driving side rotating body, and the slide piece 20 corresponds to a driven side rotating body.

  The pulley 10 is formed in a bottomed cylindrical shape whose outer diameter increases toward the base end side (right side in the drawing). A plurality of grooves 11 around which the belt is wound are provided on the outer peripheral surface on the proximal end side of the pulley 10. The belt is also wound around the crankshaft, and the crankshaft and the pulley 10 rotate in synchronization with the belt. On the inner peripheral surface of the pulley 10, a protruding portion 12 that protrudes from the inner peripheral surface and extends in the axial direction of the rotation shaft is formed. The protrusion 12 is formed in an annular cross section around the rotation axis of the pulley 10. In addition, a compressor shaft 70 of an air conditioner is connected to the pulley 10 via a bearing 13 provided on the front end side (left side in the drawing) so as to be relatively rotatable.

  The compressor shaft 70 is supported by the engine body 72 by a bearing 71 so as to be relatively rotatable. When the compressor shaft 70 rotates, the refrigerant of the air conditioner is compressed and the air conditioner is driven. In the engine body 72, an annular plate 73 is fixed to the surface on the pulley 10 side.

  In the compressor shaft 70, a straight spline 74 is formed on the outer peripheral surface of the portion located between the bearings 13 and 71. The slide piece 20 is spline fitted to the outer peripheral surface. Therefore, the slide piece 20 rotates integrally with the compressor shaft and can be relatively moved in the axial direction. The slide piece 20 is urged toward the pulley 10 side (left side in the drawing) by a coiled spring 21 disposed between the slide piece 20 and the engine body 72. The spring 21 corresponds to an urging member. A plurality of balls 22 are arranged on the outer peripheral surface of the slide piece 20. The diameter Db of the ball 22 is substantially the same as the distance from the outer peripheral surface of the slide piece 20 to the protruding portion 12 of the pulley 10. Therefore, the ball 22 is in contact with the outer peripheral surface of the slide piece 20 and the protruding portion 12. These balls 22 function as spheres. A retainer 23 that restricts the movement of the ball 22 is fixed to the outer peripheral surface. Note that the rotation axes of the pulley 10, the compressor shaft 70, and the slide piece 20 coincide with each other, and hereinafter, the rotation axis direction is simply referred to as an axial direction.

Next, the structure of the slide piece 20 will be described in detail with reference to FIGS.
As shown in FIGS. 2 and 3, the slide piece 20 is provided on the pulley 10 side (left side in the drawing) and holds the ball 22 on the outer peripheral surface thereof, and the engine body 72 side (in the drawing). And a groove portion 25 provided on the right side).

  The holding part 24 includes a cylindrical part 26 whose section is formed in a substantially circular shape, and a hexagonal column part 27 whose section is formed into a regular hexagon by side parts 28 and corner parts 29. The outer diameter of the midpoint portion 30 of each side portion 28 is the same as the outer diameter of the end surface 31 of the cylindrical portion 26. On the other hand, the outer diameter of each corner portion 29 is larger than the outer diameter of the end surface 31 of the cylindrical portion 26. Therefore, the diameter of the cylindrical portion 26 is gradually increased so that the cross section changes from a circular shape to a hexagonal shape at the hexagonal column portion 27 side.

Further, a hole 32 that extends in the axial direction (left-right direction in the drawing) and fits with the straight spline 74 of the compressor shaft 70 is formed in the central portion of the holding portion 24.
Next, the structure of the groove part 25 of the slide piece 20 is demonstrated.

  As shown in FIGS. 2 and 4, the groove portion 25 has a spiral groove 33 and a linear groove 34. The spiral groove 33 has a shape that turns 540 ° clockwise around the rotation axis of the slide piece 20 with the upper portion in the drawing as the starting point 35 (0 °), and the diameter is reduced as the turn is made. That is, the standing surface 36 formed on the side facing the hexagonal column 27 of the holding portion 24 in the spiral groove 33 is positioned closer to the pulley 10 side (left side in FIG. 2) as the spiral groove 33 turns. Is formed. In the spiral groove 33, the inner diameter of the first standing surface 361 and the outer diameter of the second rising surface 362 are connected by the side surface 37. Therefore, the spiral groove 33 is formed in a step shape as shown in FIG.

  In the present embodiment, the direction in which the spiral groove 33 converges toward the rotation axis of the slide piece 20 is the direction in which the spiral groove 33 extends. That is, the direction on the pulley 10 side (left side in the drawing) in the axial direction, in other words, the direction in which the slide piece 20 is urged by the spring 21 is the direction in which the spiral groove 33 extends.

  Further, in the same direction, a straight groove 34 extending in the circumferential direction of the rotation axis of the slide piece 20 is formed over the entire circumference on the front side (left side in FIG. 2) of the spiral groove 33. The linear groove 34 is formed continuously from the spiral groove 33 with the end point portion 38 at a position turned 540 ° from the start point portion 35 of the spiral groove 33 as the start point portion 40. The linear groove 34 is provided such that the position of the standing surface 39 in the axial direction is substantially constant. The length in the radial direction of the standing surface 39 gradually decreases as the turn from the starting point portion 40. Therefore, when the linear groove 34 turns one turn (540 ° to 900 °), the linear groove 34 returns to the end point portion 38 of the spiral groove 33.

Next, the structure of the cage 23 fixed to the outer peripheral surface of the slide piece 20 will be described with reference to FIG.
As shown in FIG. 5, the retainer 23 has a cylindrical shape, and is formed with a substantially hexagonal inner hole 41 having the same shape as the cross section of the hexagonal column portion 27 of the retaining portion 24. The holder 23 is fixed to the hexagonal column portion 27 of the slide piece 20 by inserting the holding portion 24 of the slide piece 20 into the inner hole 41. Therefore, when the slide piece 20 rotates, the cage 23 also rotates together. In the cage 23, a plurality of holding holes 42 centering on the midpoint portion 30 are formed in a portion facing the midpoint portion 30 of the holding portion 24. The holding hole 42 is formed in a shape having a shorter length in the circumferential direction toward the cylindrical portion 26 side of the holding portion 24. Then, by arranging the ball 22 in the holding hole 42, the ball is held at a predetermined position on the outer peripheral surface of the slide piece 20. The ball 22 is allowed to move to the outer peripheral surface of the cylindrical portion 26 and the outer peripheral surface of the hexagonal column portion 27, and when positioned on the outer peripheral surface of the hexagonal column portion 27, the ball 22 moves in the circumferential direction within a predetermined range. Movement is also permitted.

Next, the mode of switching the power transmission state in a clutch having such a configuration will be described.
As shown in FIG. 6A, when the ball 22 is positioned on the outer periphery of the hexagonal column 27 in the holding portion 24 of the slide piece 20, the outer peripheral surface becomes closer to each corner 29 from each middle point 30. And the protrusion 12 of the pulley 10 become narrow. Therefore, for example, when the pulley 10 rotates in the clockwise direction in the figure, each ball 22 rolls clockwise by the friction force, and the ball 22 is non-rotatably fitted in a portion where the gap is smaller than the diameter Db of the ball 22. Will be. As a result, the pulley 10 and the slide piece 20 are connected, that is, the clutch is connected, and the rotational power of the pulley 10 is transmitted to the slide piece 20. As a result, the compressor shaft 70 rotates and the air conditioner is in a driving state.

  On the other hand, as shown in FIG. 6B, when the ball 22 is located on the outer periphery of the cylindrical portion 26 of the slide piece 20, the gap with the protruding portion 12 is the diameter of the ball 22 on the entire outer periphery. It is maintained at approximately the same length as Db. Therefore, for example, when the pulley 10 rotates clockwise in the drawing in this state, the ball 22 rotates between the slide piece 20 and the protruding portion 12. Accordingly, the connection between the pulley 10 and the slide piece 20 is released, that is, the clutch is disconnected, and the rotational power of the pulley 10 is not transmitted to the slide piece 20. As a result, the compressor shaft 70 does not rotate and the air conditioner is not driven.

  As shown in FIG. 7, in the plate 73, a solenoid 50 and a pin 60 connected to the solenoid 50 are disposed on the outer peripheral side of the slide piece 20. The pin 60 has a long hole 61 formed at one end thereof and an insertion portion 62 inserted into the groove 25 of the slide piece 20 at the other end thereof. Further, a shaft portion 63 that supports the pin 60 so as to be rotatable and not movable in the axial direction of the pulley 10 is provided between the one end portion and the other end portion. In FIG. 1, the illustration of the solenoid 50 and the pin 60 is omitted.

  The movable iron core 51 of the solenoid 50 is connected to the long hole 61 of the pin 60 via a connecting member 64. Then, as shown by the solid line in the figure, when the movable iron core 51 protrudes from the solenoid 50, the pin 60 rotates around the shaft portion 63, and the insertion portion 62 is inserted into the groove portion 25. On the other hand, when the movable iron core 51 is pulled into the solenoid 50 as indicated by a two-dot chain line in the drawing, the pin 60 rotates around the shaft portion 63 and the insertion portion 62 is pulled out from the groove portion 25.

Next, the configuration of the solenoid 50 will be described in detail.
As shown in FIG. 8A, the solenoid 50 includes a movable iron core 51, a yoke 52 that holds the movable iron core 51, and a coil 53 and a magnet 54 that are disposed in the yoke 52. Yes. A hole 55 is formed in one end of the movable iron core 51. The hole 55 is connected to the long hole 61 of the pin 60 by the connecting member 64. Further, a ring member 56 is connected to the outer periphery of the movable iron core 51, and a spring 57 is disposed between the ring member 56 and the yoke 52. By this spring 57, an urging force acts in a direction in which the movable iron core 51 is projected (right direction in the figure).

  As shown in FIG. 8A, when the coil 53 is energized with the movable iron core 51 protruding, the movable iron core 51 is drawn into the yoke 52 by the magnetic force of the coil 53. When the movable iron core 51 comes into contact with the receiving portion 58, the attractive force for drawing the movable iron core 51 by the magnet 54 becomes stronger than the elastic force of the spring 57. In this state, when the energization to the coil 53 is stopped, the attractive force of the magnet 54 is stronger than the elastic force of the spring 57, so that the movable iron core 51 is held in a retracted state as shown in FIG. Is done.

  On the other hand, when the coil 53 is energized to generate a reverse magnetic field that cancels the magnetic force of the magnet 54 in a state where the movable iron core 51 is retracted, the attractive force of the magnet 54 is weakened, and the spring is stronger than the attractive force. The elastic force of 57 becomes larger. Therefore, the movable iron core 51 is protruded to a position where the ring member 56 contacts the yoke 52. Thus, in a state where the movable iron core 51 is protruded and separated from the receiving portion 58, the elastic force of the spring 57 is stronger than the attractive force of the magnet 54. Therefore, once the coil 53 is energized, once the movable iron core 51 is separated from the receiving portion 58, even if the energization is stopped thereafter, the coil 53 is movable by the elastic force of the spring 57 as shown in FIG. The iron core 51 is held in a protruding state.

  Therefore, by energizing the coil 53 of the solenoid 50, the movable iron core 51 can be moved to switch between insertion and extraction of the pin 60 into the spiral groove 33, and by deenergizing the coil 53, The current state of 60 can be maintained.

Next, the operation of the clutch of this embodiment will be described with reference to FIG.
FIG. 9A shows a state where the slide piece 20 is urged by the urging force of the spring 21 and is located closest to the pulley 10 in the axial direction. As shown in the figure, when the slide piece 20 is positioned closest to the pulley 10, the ball 22 is positioned on the outer periphery of the hexagonal column portion 27 of the slide piece 20. At this time, when the pulley 10 rotates, the ball 22 is non-rotatably fitted between the pulley 10 and the slide piece 20 to join the protruding portion 12 of the pulley 10 and the slide piece 20 together. Therefore, the clutch is in a connected state, the slide piece 20 and the compressor shaft 70 rotate together with the pulley 10, and the air conditioner is driven. Note that the position of the slide piece 20 when the clutch is in the engaged state in this way corresponds to the first position.

  Further, in such a state, when the coil 53 is energized and the insertion portion 62 of the pin 60 is inserted into the spiral groove 33 of the slide piece 20 in a rotating state (FIG. 9B), the pin 60 is spiraled. A part of the rotational force of the slide piece 20 is converted into an axial force in sliding contact with the standing surface 36 of the groove 33. Therefore, the slide piece 20 moves to the right side in the axial direction (FIG. 9C). At this time, the ball 22 provided on the outer periphery of the slide piece 20 rolls from the outer peripheral surface of the hexagonal column portion 27 to the outer peripheral surface side of the cylindrical portion 26 as the slide piece 20 moves in the axial direction.

  9D, when the pin 60 slides on the standing surface 36 of the spiral groove 33 and the amount of movement of the slide piece 20 in the axial direction increases, the ball 22 is held by the cage 23. It is guided by the hole 42 and is positioned on the outer periphery of the cylindrical portion 26. When the ball 22 is positioned on the outer periphery of the cylindrical portion 26, the ball 22 is rotated between the slide piece 20 and the protruding portion 12, and the connection between the slide piece 20 and the protruding portion 12 is released. . Therefore, the clutch is disengaged and the driving of the air conditioner is stopped. In addition, the position of the slide piece 20 when the clutch is in the disengaged state in this way corresponds to the second position.

  Further, even after the connection between the pulley 10 and the slide piece 20 is released in this way, the slide piece 20 may still maintain the rotation state due to its inertia. In this regard, as shown in FIG. 9D, when the pin 60 comes into sliding contact with the standing surface 39 of the linear groove 34, the rotational force of the slide piece 20 is not converted into axial force. Therefore, the movement of the slide piece 20 in the axial direction after the connection between the slide piece 20 and the pulley 10 is released is restricted.

  On the other hand, when the clutch is disengaged from the disengaged state again, the coil 53 is energized and the insertion portion 62 of the pin 60 is pulled out from the linear groove 34 (FIG. 9 (e)). When the pin 60 is pulled out from the straight groove 34, the slide piece 20 is pressed by the biasing force of the spring 21, and the slide piece 20 moves to the left in the axial direction. At this time, as the slide piece 20 moves, the ball 22 rolls from the outer peripheral surface of the cylindrical portion 26 to the outer peripheral surface side of the hexagonal column portion 27. Then, as shown in FIG. 9 (f), when the slide piece 20 is pressed to the most pulley 10 side, the ball 22 is positioned on the outer periphery of the hexagonal column portion 27. Therefore, the ball 22 is fitted between the pulley 10 and the slide piece 20, and the clutch is connected.

According to the embodiment described above, the following effects can be obtained.
(1) In this embodiment, when releasing the clutch, the pin 60 is inserted into the spiral groove 33 of the slide piece 20 in a rotating state. Then, a part of the rotational force of the slide piece 20 is converted into an axial force, and the slide piece 20 is moved to the second position. Therefore, the force required to release the clutch can be obtained from the rotational force of the slide piece 20, and the power transmission state can be switched while suppressing the enlargement of the clutch even when the coupling torque is large. It becomes possible.

  (2) In the present embodiment, the spiral groove 33 is stepped. Therefore, the length in the axial direction of the portion where the spiral groove 33 is formed can be shortened, and the enlargement of the clutch can be more suitably suppressed.

  (3) In this embodiment, the pin 60 is in sliding contact with the linear groove 34 to restrict the movement of the slide piece 20 in the axial direction after the connection between the pulley 10 and the slide piece 20 is released. . Therefore, the length of the clutch in the axial direction can be shortened to save the clutch space.

  (4) In the present embodiment, when the slide piece 20 is moved to the first position, the slide piece 20 and the pulley 10 are non-rotatably fitted and connected to each other, while the slide piece 20 is connected to the second position. A ball 22 is provided to release the connection between the slide piece 20 and the pulley 10 when moved to the position. Therefore, for example, unlike a crimping clutch, a larger torque can be transmitted without increasing the size.

  (5) In the present embodiment, the self-holding solenoid 50 is used as the solenoid 50. Therefore, it is only necessary to energize the coil 53 only when switching the power transmission state of the clutch, and the power consumption of the solenoid can be reduced.

In addition, said 1st embodiment can also be implemented with the following forms which changed this suitably.
In the above embodiment, the self-holding solenoid 50 is used as the solenoid 50, but a solenoid that inserts the pin 60 into the spiral groove 33 only while the coil 53 is energized may be used. According to such a configuration, since the clutch is released only when the coil 53 is energized, the clutch is engaged when the solenoid 50 fails and the coil cannot be energized. Therefore, the air conditioner can be driven even if the solenoid 50 fails.

  In each of the above embodiments, the insertion and withdrawal of the pin 60 into and from the groove 25 are switched by the solenoid. However, the insertion and withdrawal of the pin 60 may be switched by an actuator other than the solenoid, such as a hydraulic actuator. Good.

  In each of the above embodiments, the slide piece 20 and the pulley 10 are connected by the ball 22, but a pressure contact surface is formed on a part of the outer peripheral surface of the slide piece 20, and this pressure contact surface is used as the pulley. A compression-type clutch that connects the clutch by pressing against the clutch 10 may be used.

In each of the above embodiments, the groove 25 is formed on the outer peripheral surface of the slide piece 20, but the groove 25 may be formed on the inner peripheral surface of the slide piece 20.
In each of the above embodiments, the diameter of the pulley 10 is reduced toward the pulley 10 in the axial direction to form the stepped groove section 25. However, such a configuration may be omitted.

In each of the above embodiments, the linear groove 34 is provided, but such a configuration may be omitted.
In each of the above embodiments, the spiral groove 33 has a shape rotated 540 ° clockwise from the starting portion 35 (0 °), but the turning range is set to an arbitrary range such as 180 ° or 720 °, for example. be able to. The point is that the slide piece 20 may be moved to the second position by sliding between the spiral groove 33 and the pin 60.

In each of the above embodiments, the coiled spring 21 is used as the biasing member. However, as the biasing member, other members such as springs and rubbers having other shapes may be used.
In each of the above embodiments, the clutch provided between the crankshaft and the air conditioner and switching the power transmission state is shown. However, the clutch is disposed between another auxiliary machine such as a water pump or an oil pump and the crankshaft. It can also be applied to the clutch. Further, the present invention is not limited to switching the transmission state of power from the crankshaft, but can be applied to a clutch that switches the transmission state of power from another power source.

  DESCRIPTION OF SYMBOLS 10 ... Pulley (drive side rotary body), 11 ... Groove, 12 ... Projection part, 13, 71 ... Bearing, 20 ... Slide piece (driven side rotary body), 21 ... Spring, 22 ... Ball, 23 ... Cage, 24 DESCRIPTION OF SYMBOLS ... Holding part, 25 ... Groove part, 26 ... Cylindrical part, 27 ... Hexagonal column part, 28 ... Side part, 29 ... Corner | angular part, 30 ... Middle point part, 31 ... End surface, 32 ... Hole, 33 ... Spiral groove, 34 ... Straight groove, 35 ... starting point of spiral groove, 36, 39 ... standing surface, 361 ... standing surface on first round, 362 ... standing surface on second round, 37 ... side surface, 38 ... end point portion, 40 ... Starting point of linear groove, 41 ... inner hole, 42 ... holding hole, 50 ... solenoid, 51 ... movable iron core, 52 ... yoke, 53 ... coil, 54 ... magnet, 55 ... hole, 56 ... ring member, 57 ... spring , 58 ... receiving part, 60 ... pin, 61 ... long hole, 62 ... insertion part, 63 ... shaft part, 64 ... connecting member, 70 ... Compressors shaft, 72 ... engine body, 73 ... plate, 74 ... straight spline.

Claims (4)

The drive-side rotator and the second position where the connection between the drive-side rotator and the first position coupled to the drive-side rotator is released by moving along the axial direction of the drive-side rotator A driven-side rotating body displaceable to a position; and a biasing member that biases the driven-side rotating body from the second position toward the first position;
On the outer peripheral surface of the driven-side rotor, a step-like spiral groove is formed that extends in the urging direction of the urging member and decreases in diameter toward the front side in the urging direction.
A clutch having a pin that can be inserted into the spiral groove. The spiral groove is connected to a linear groove that is provided on the front side in the biasing direction with respect to the spiral groove and extends in the circumferential direction of the driven rotary body, and the driven rotary body moves to the second position. clutch according to claim 1, wherein the pin is in sliding contact with the linear groove when. A sphere that mediates the connection between the driven-side rotator and the drive-side rotator, the sphere being moved when the driven-side rotator is moved to the first position; While being connected non-rotatably between the driving side rotating body and connecting both rotating bodies, the driven side rotating body and the driving side rotating body are moved when the driven side rotating body moves to the second position. clutch according to claim 1 or 2 is rotated to release the connection of the two rotary bodies with the. The pin is to be switched between insertion and extraction into the spiral groove by a solenoid,
The solenoid switches the inserted state and the extraction state of the pin by energization of the coil, at the time of non-energization any one of claims 1 to 3 which is a self-hold solenoid to maintain the state of the pin at that time Clutch described in.