JP5880507B2 - clutch - Google Patents

Description

  The present invention relates to a clutch that switches a transmission state of power to a driven-side rotator by switching a connection state of a driven-side rotator with respect to a drive-side rotator.

  A mechanical pump for circulating cooling water and a crankshaft are connected via a clutch and the pump is driven by the rotational force of the crankshaft, or the pump is stopped by releasing the clutch connection. Engines that can do this are known. The clutch for switching the coupling state of the pump with respect to the crankshaft includes a driving side rotating body connected to the crankshaft and a driven side rotating body provided so as to be rotatable relative to the driving side rotating body. There is one that maintains the clutch in a connected state by pressing the rotating body with the magnetic force of a magnet.

  In order to release the connected state in such a clutch, energization control is performed on a coil provided in the clutch to generate a magnetic field that cancels the magnetic force (for example, Patent Document 1).

JP 2010-203406 A

  By the way, as in Patent Document 1, when the driving-side rotating body and the driven-side rotating body are brought into pressure contact with each other to make the clutch in a connected state, the magnitude of torque that must be transmitted through the clutch, that is, the driven The greater the magnitude of torque required by the device that is rotationally driven by the side rotating body, the greater the pressure contact force required. When the magnet is changed to one having a stronger magnetic force in order to increase the pressure contact force, the coil for canceling the magnetic force is increased accordingly.

  When the coil becomes large, the device becomes large and the power consumption becomes large. Therefore, there is a demand for reducing the force required for releasing the connected state as much as possible while transmitting a large torque.

  Note that these problems are not limited to the generation of a magnetic field to cancel the magnetic force of the magnet as described above, but relative movement between the driving side rotating body and the driven side rotating body by an actuator, such as one that releases the coupled state by hydraulic pressure. In general, the clutches that release the connection are generally the same.

  This invention is made | formed in view of such a situation, The objective is to provide the clutch which can cancel | release connection with small force.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A clutch for solving the above problems includes a drive-side rotator , a spiral portion having a rotation axis of the drive-side rotator as a central axis, and a depth deeper than the spiral portion and perpendicular to the rotation axis direction of the rotation shaft. grooves having an annular portion extending along the entire periphery is provided on the outer peripheral surface Te, along between a release position connected to the connection position connected to the driving side rotational member is released in the rotation axis direction A driven-side rotating body that is movable , a biasing member that biases the driven-side rotating body from the release position toward the connection position, and a pin that can be inserted into and removed from the groove. A pin that inserts the pin into the spiral portion to move the driven-side rotating body to the release position, and the spiral portion extends toward the annular portion and the top surface thereof is the spiral portion. A spiral wall that constitutes the bottom surface of the Wherein the annular portion includes a groove adjacent to opposite a side and the spiral wall in the rotation axis direction, the convex portion is provided at the distal end portion inserted into Oite the helical portion to the pin Te When the tip of the pin is inserted into the spiral portion, the convex portion is accommodated in the concave groove, and the concave groove and the annular portion are formed at the end of the spiral wall on the annular portion side. A connecting portion to be connected is formed. In the connecting portion, the concave groove and the annular portion are continuous so that the convex portion can displace the concave groove and the annular portion.

  According to the above configuration, the driven-side rotator is urged toward the coupling position by the urging force of the urging member. When the driven-side rotator is in the coupling position, the drive-side rotator and the driven-side rotator are connected.

  On the other hand, when the pin is inserted into the spiral portion of the driven side rotating body rotating together with the driving side rotating body, the driven side rotating body rotates with the pin engaged with the side wall of the spiral portion, and the driven side rotation The body moves from the connection position to the release position against the urging force of the urging member. As a result, the connection between the driving side rotating body and the driven side rotating body is released.

  That is, according to the above configuration, a force necessary to release the clutch can be obtained from the rotational force of the driven-side rotator. Therefore, the connection can be released with a small force.

  Note that when the connection between the drive-side rotator and the driven-side rotator is released, torque is not transmitted from the drive-side rotator to the driven-side rotator, but immediately after the connection is released, the driven The side rotating body continues to rotate with inertial force. However, when the connection is released, a pin is inserted into the annular portion, and the driven-side rotator is not displaced in the direction of the rotation axis. Then, the rotation of the driven-side rotator that is no longer transmitting torque from the drive-side rotator gradually slows down, and the driven-side rotator eventually stops.

  In the above configuration, since the driven side rotator is urged toward the connection position by the urging force of the urging member, the state in which the pin is inserted into the annular portion is maintained in order to maintain the released state. Will do. And when connecting a drive side rotary body and a driven side rotary body again, the pin currently inserted in the annular part of a slot is pulled out. When the pin is pulled out in this manner, the engagement between the pin and the driven-side rotator is released, the urging force of the urging member moves the driven-side rotator to the connecting position, and the driving-side rotator and the driven-side rotator are connected again. It will be in the state.

  Here, in the groove formed on the outer peripheral surface of the driven rotating body, the depth of the annular portion is deeper than the depth of the spiral portion, and there is a step in the portion where the spiral portion and the annular portion are connected. Has occurred. And the side wall of this level | step difference regulates that the pin which moved from the spiral part to the annular part returns from the annular part to the spiral part.

  However, when the pin is displaced from the spiral portion to the annular portion as the driven side rotating body rotates, the pin is inserted into the deeper annular portion, and the pin is placed on the side wall of the step between the spiral portion and the annular portion. Since it needs to be engaged, the amount of pin insertion must be increased. It takes a certain amount of time to increase the amount of pin insertion and engage the side wall of the step. For this reason, the rotational speed of the drive-side rotator is large, and it takes more time for the pin to pass through the end of the spiral portion and reach the phase where the spiral portion exists again than the time it takes to engage the pin with the side wall of the step. If the time required is short, the pin cannot be moved to the annular portion, and there is a possibility that the disconnected state cannot be properly maintained. If the actuator for driving the pin is enlarged, the time required to increase the amount of insertion of the pin and engage with the side wall of the step can be shortened, but this leads to an increase in the size of the apparatus.

  In this regard, in the above configuration, a convex portion is provided at the tip of the pin, and a concave groove for accommodating the convex portion is provided on the bottom surface of the spiral portion. According to such a configuration, when the pin is inserted into the spiral portion and the convex portion is accommodated in the concave groove, the convex portion of the pin is already inserted deeper than the bottom surface of the spiral portion. Therefore, when the pin reaches the end of the spiral portion, the convex portion is engaged with the side wall of the step between the spiral portion and the annular portion without increasing the insertion amount of the pin. Therefore, even when the rotational speed of the drive-side rotator is high, the pin can be engaged with the side wall of the step, and the pin returns to the spiral portion while suppressing an increase in the size of the device. Can be suppressed.

In the clutch, in the pin, the pin along the surface on which the pin is engaged with the side wall of the helical portion when being inserted into the spiral portion, the embodiments such as the convex portion is eclipsed set Can be adopted. In addition, the side wall of the spiral part is a side wall of the concave groove that is away from the annular part in the rotation axis direction.
In this case, the surface of the pin that contacts the side wall of the groove can be a wider surface including the side surface of the convex portion, and the sliding surface between the pin and the side wall of the groove when the driven side rotating body rotates. Becomes wider. Therefore, the contact surface pressure between the pin and the side wall of the spiral portion can be reduced, and the wear of the pin can be suppressed.

In the clutch, it is possible to adopt a mode in which the convex portion has a tapered surface at the tip and becomes narrower toward the tip.
When the pin is inserted into the spiral portion, if the tip of the convex portion comes into contact with the outer peripheral surface of the driven side rotating body or the bottom surface of the spiral portion, the pin cannot be smoothly inserted into the spiral portion, There is a possibility that the convex portion cannot be smoothly inserted into the concave groove.

  On the other hand, if a tapered surface is provided at the tip of the convex portion as in the above configuration, the tip of the convex portion abuts on the outer peripheral surface of the driven-side rotating body or the bottom surface of the spiral portion when the pin is inserted. Even if it does, these members which contact | abut will slide along a taper surface, and it becomes possible to shift a mutual positional relationship now to a rotating shaft direction. Therefore, it is possible to correct the deviation in the rotation axis direction between the pin and the driven side rotating body and guide the pin to the inside of the spiral portion.

Further, in the clutch, it is possible to adopt a mode in which the convex portion has the tapered surface at the tip of the surface facing the spiral wall when the convex portion is accommodated in the concave groove. .
According to the above configuration, even if the relative position in the rotation axis direction of the pin and the driven-side rotator is shifted and the tip of the convex portion comes into contact with the bottom surface of the spiral portion when the pin is inserted into the spiral portion, the tapered surface The convex part of the pin and the driven-side rotator slide along the axis so that the positional relationship between them can be shifted in the direction of the rotation axis. Therefore, it is possible to correct the deviation in the rotation axis direction between the pin and the driven-side rotating body, and to guide the convex portion into the concave groove.

Further, in the clutch of the above-described configuration, it is possible to the spiral wall facing the front Symbol tapered surface, to adopt a manner such is formed by the tapered surface inclined at an angle equal to the tapered surface.

According to the above configuration, the taper surface of the convex portion of the pin and the taper surface of the spiral wall are in contact with each other in a parallel state, and the pin is applied to the side wall of the spiral portion by the force in the direction of inserting the pin. A force in the direction of urging toward it is applied. For this reason, the convex portion of the pin can be brought into close contact with the spiral wall , and the pin can be brought into close contact with the side wall of the spiral portion.

In the clutch, it is possible to adopt a mode in which the convex portion has the tapered surface at the tip of the surface facing the side wall of the concave groove when the convex portion is accommodated in the concave groove. . In addition, the side wall of the said ditch | groove is a side wall in the said ditch | groove which is separated from the said annular part of the said rotating shaft direction.
According to the above configuration, even if the relative position in the rotation axis direction of the pin and the driven-side rotator is shifted, and the tip of the convex portion comes into contact with the outer peripheral surface of the driven-side rotator when the pin is inserted into the spiral portion. The convex portion of the pin and the driven side rotating body slide along the tapered surface, and the positional relationship between them can be shifted in the direction of the rotation axis. Therefore, it is possible to correct the deviation in the rotation axis direction between the pin and the driven side rotating body, and to guide the convex portion to the inside of the spiral portion.

In the clutch, the length in a direction perpendicular to the rotation axis direction of the convex portion, it is possible to adopt a mode such is longer than the length in a direction perpendicular to the rotation axis direction of the connection portion.

  When the pin is in the annular portion, the pin passes through the connecting portion where the concave portion provided on the bottom surface of the spiral portion and the annular portion are connected with the rotation of the driven side rotating body. Since there is no separation between the concave groove and the annular portion in this connection portion, at this time, the urging force of the urging member causes the convex portion of the pin inserted in the annular portion to run backward from the annular portion to the spiral portion. There is a possibility.

  On the other hand, as described above, if the length in the direction orthogonal to the rotation axis direction of the convex portion is longer than the length in the direction orthogonal to the rotation axis direction of the connection portion between the groove and the annular portion. When the convex portion of the pin passes through the connecting portion between the concave groove and the annular portion, the pin is less likely to enter the spiral portion from the connecting portion. In this way, it is possible to suppress the displacement of the pin insertion position from the annular portion to the spiral portion, so that the driving side rotating body and the driven side rotating body are connected even though the pin is not pulled out of the groove. It can suppress that it will be in a state.

Sectional drawing of the clutch of 1st Embodiment. The side view which shows the state which cancelled | released connection of the clutch of 1st Embodiment. The side view which shows the connection state of the clutch of 1st Embodiment. Sectional drawing which shows the structure of the actuator which drives the relationship between the groove | channel of the driven side rotary body of the clutch of 1st Embodiment, and a locking member, and a locking member. The development view of the groove in the clutch of a 1st embodiment. Sectional drawing along line 6-6 in FIG. Sectional drawing along line 7-7 in FIG. Sectional drawing along line 8-8 in FIG. Sectional drawing along line 9-9 in FIG. The expansion | deployment figure of the groove | channel in the clutch of 2nd Embodiment. Sectional drawing along the 11-11 line in FIG. Sectional drawing in alignment with line 12-12 in FIG. Sectional drawing of the pin and groove | channel in the clutch of 3rd Embodiment. Sectional drawing of the pin and groove | channel in another modification. The perspective view which shows the shape of the pin in another modification.

(First embodiment)
Hereinafter, a first embodiment of the clutch will be described with reference to FIGS.
The clutch according to the first embodiment switches the transmission state of power from a crankshaft of an engine to a water pump that circulates engine coolant.

  As shown in FIG. 1, the clutch 100 according to the present embodiment is housed in a housing portion 310 provided in the housing 300. A support member 320 having a substantially cylindrical shape is fitted into the housing 300. The output shaft 210 of the clutch 100 is rotatably supported by the support member 320 via a first bearing 330 disposed on the inner peripheral side of the support member 320.

  An impeller 220 of the pump 200 is attached to the distal end side (right end side in FIG. 1) of the output shaft 210 so as to be integrally rotatable. On the other hand, on the base end side (left end side in FIG. 1) of the output shaft 210, the drive side rotating body 110 is rotatably supported via the second bearing 340. A straight spline 212 is formed on the outer peripheral surface of a portion of the output shaft 210 located between the first bearing 330 and the second bearing 340.

  As shown in FIG. 1, a driven side rotating body 120 is disposed between the housing 300 and the driving side rotating body 110. In the driven-side rotating body 120, an engaging portion 121 provided on the inner peripheral surface is fitted to the straight spline 212 of the output shaft 210, thereby rotating integrally with the output shaft 210, and the output shaft It can move along the direction of the rotation axis 210. In the present embodiment, the rotation shafts of the output shaft 210, the drive-side rotator 110, and the driven-side rotator 120 coincide with each other as shown by a one-dot chain line in FIGS. The stretching direction is called the rotation axis direction.

  The driven-side rotator 120 has an external shape such that two cylinders having different diameters are joined with their central axes aligned, and a large-diameter portion 122 is provided on the drive-side rotator 110 side (left side in FIG. 1). It is supported by the output shaft 210 in such an orientation that the small diameter portion 123 is located on the 200 side (right side in FIG. 1).

  The small diameter portion 123 of the driven side rotating body 120 is formed with a recess 124 that opens toward the pump 200 side. A plurality of housing recesses 125 for housing the biasing member 135 are formed in the bottom of the recess 124 along the circumferential direction so as to surround the output shaft 210.

  The urging member 135 is, for example, a coiled spring, and is housed in the housing recess 125 of the driven-side rotator 120, and the tip is locked to a locking protrusion 211 provided on the output shaft 210. The urging member 135 is housed in the housing recess 125 in a compressed state, and urges the driven-side rotator 120 toward the drive-side rotator 110 (leftward in FIG. 1).

  The large-diameter portion 122 of the driven-side rotator 120 is formed with a plurality of sphere housing grooves 127 for housing the sphere 130 in the circumferential direction. Further, an arc groove 111 is formed on the inner peripheral surface of the driving side rotating body 110 over the entire circumference. As shown in FIG. 1, the arc groove 111 has an arc shape in cross section. A sphere 130 is accommodated in a space formed by the sphere accommodating groove 127 and the arc groove 111.

  When the driven-side rotating body 120 is moved so as to approach the driving-side rotating body 110 by the biasing force of the biasing member 135 and is at the position shown in FIG. The rotating body 120 is connected.

  In the following description, among the positions in the rotation axis direction of the driven side rotating body 120 that moves in the rotation axis direction along the output shaft 210, the driving side rotating body 110 and the driven side rotating body 120 as shown in FIG. The position where the two are connected is called a connection position.

  A cup-shaped driven pulley 270 that surrounds the clutch 100 housed in the housing portion 310 of the housing 300 is attached to the drive-side rotating body 110. A driving pulley 260 is attached to an end portion of the crankshaft 250 so as to be integrally rotatable, and the driving pulley 260 and the driven pulley 270 are connected by winding a belt 280.

  Therefore, as shown in FIG. 1, when the driven-side rotator 120 is in the coupling position and the driving-side rotator 110 and the driven-side rotator 120 are coupled via the sphere 130, The rotation is transmitted to the driven side rotating body 120 and the output shaft 210 via the driving side pulley 260 and the belt 280. Then, the cooling water is delivered from the pump 200 by the impeller 220 that rotates integrally with the output shaft 210. 2 and 3, the driving side rotating body 110 rotates clockwise when the driving side rotating body 110 is viewed from the tip side of the output shaft 210 (the right end side in FIGS. 2 and 3). Rotate in the direction

  As shown in FIGS. 2 and 3, the spherical body accommodation groove 127 formed in the large-diameter portion 122 of the driven-side rotator 120 extends from the end surface of the large-diameter portion 122 along the rotation axis direction and bends in the middle. The drive-side rotator 110 extends in the rotation direction, and the end thereof is a holding portion 128.

The depth of the spherical body accommodation groove 127 is shallow along the rotation direction of the driving side rotating body 110, and the depth of the holding portion 128 is the shallowest.
Therefore, as shown in FIG. 2, when the sphere 130 is accommodated in the portion of the sphere accommodation groove 127 extending in the rotation axis direction, the sphere accommodation groove 127 and the arc groove 111 of the drive side rotator 110 (see FIG. 1). ), A gap allowing the rotation of the sphere 130 is formed.

  On the other hand, as shown in FIG. 3, when the sphere 130 moves in the sphere housing groove 127 and is positioned in the holding portion 128, the sphere housing groove 127 and the arc-shaped groove 111 of the driving side rotating body 110 in this portion. (See FIG. 1), the gap 130 is small, so that the sphere 130 is sandwiched between the driven-side rotator 120 and the drive-side rotator 110 and cannot rotate.

  Thus, when the driven-side rotator 120 moves to the connection position shown in FIG. 3, the sphere 130 becomes non-rotatable, so that the driven-side rotator 120 rotates together with the drive-side rotator 110. In other words, the sphere 130 is non-rotatably fitted between the driven-side rotator 120 and the driving-side rotator 110 when the driven-side rotator 120 moves to the coupling position, and the driven-side rotator 120 and the driving side The rotating body 110 is connected.

  On the other hand, when the driven-side rotator 120 moves to the position shown in FIG. 2, the sphere 130 is removed from the holding portion 128 and enters a portion of the sphere receiving groove 127 extending in the rotation axis direction. This is because almost half of the sphere 130 is accommodated in the circular arc groove 111 of the drive-side rotator 110, and relative movement in the rotation axis direction with respect to the drive-side rotator 110 is restricted. Thus, when the spherical body 130 is detached from the holding portion 128 having a shallow depth and enters a portion extending in the direction of the rotation axis that is deeper than the holding portion 128, the driven side rotating body 120 and the driving side rotating body 110. The sphere 130 is rotated between the two. As a result, relative rotation between the driving side rotating body 110 and the driven side rotating body 120 is allowed, and the connection of the driven side rotating body 120 to the driving side rotating body 110 is released.

  In the following description, among the positions in the rotation axis direction of the driven side rotating body 120 that moves in the rotation axis direction along the output shaft 210, the driving side rotating body 110 and the driven side rotating body 120 as shown in FIG. The position at which the connection with is released is called the release position.

  As shown in FIGS. 2 and 3, a groove 400 extending in the circumferential direction is formed on the outer peripheral surface of the small diameter portion 123 of the driven side rotating body 120. The groove 400 includes a spiral portion 410 having a rotation axis as a central axis, and an annular portion 420 that is continuous with the spiral portion 410 and extends perpendicular to the rotation axis direction. The spiral portion 410 is inclined so that the outer circumferential surface of the driven-side rotator 120 substantially goes around and the side wall 413 approaches the drive-side rotator 110 toward the rear side in the rotation direction of the drive-side rotator 110. Further, the annular portion 420 is continuous with the spiral portion 410 and is formed over the entire outer peripheral surface of the driven side rotating body 120. The configuration of the groove 400 will be described in detail later.

  As shown in FIGS. 2 and 3, the clutch 100 includes a locking member 140 and an actuator 150 for taking a pin 141 provided at the tip of the locking member 140 into and out of the groove 400.

  The position of the locking member 140 in the rotation axis direction is restricted. As shown in FIG. 3, the pin 141 can be inserted in the vicinity of the start end 411 of the spiral portion 410 in the groove 400 when the locking member 140 is positioned in the rotation axis direction as shown in FIG. 3. Is set to Thereby, when the locking member 140 is driven to the driven side rotating body 120 side by the actuator 150 when the driven side rotating body 120 is in the coupling position, the pin 141 is inserted in the vicinity of the start end 411 of the spiral portion 410. It will be. The pin 141 inserted into the spiral portion 410 engages with the side wall 413 of the spiral portion 410, thereby locking the driven side rotating body 120 against the biasing force of the biasing member 135.

  As shown in FIG. 3, when the pin 141 of the locking member 140 is inserted into the spiral portion 410 in a state where the driven-side rotor 120 is connected to the drive-side rotor 110, the sidewall 413 of the spiral portion 410 is inserted. The driven rotary body 120 rotates with the pin 141 engaged. Then, while the pin 141 slides on the side wall 413 of the spiral portion 410, the driven-side rotator 120 moves in the rotation axis direction from the connection position toward the release position. When the pin 141 reaches the terminal end 412 of the spiral portion 410, the pin 141 is inserted into the annular portion 420, and the driven rotary body 120 moves to the release position as shown in FIG. Thus, in the clutch 100, the pin 141 of the locking member 140 is inserted into the groove 400, and the pin 141 is engaged with the side wall 413 of the spiral portion 410, so that the driven side rotating body 120 is attached to the biasing member 135. Move to the release position against the force.

  When the connection between the driving side rotating body 110 and the driven side rotating body 120 is released, torque is not transmitted from the driving side rotating body 110 to the driven side rotating body 120, but the connection is released. Immediately after this, the driven-side rotator 120 continues to rotate with inertial force. However, as shown in FIG. 2, when the driven-side rotator 120 is in the release position, the pin 141 is inserted into the annular portion 420, and the driven-side rotator 120 is not displaced in the rotation axis direction. Then, since the torque is not transmitted to the driven-side rotator 120 from the drive-side rotator 110, the rotation speed gradually decreases and the rotation stops.

  Since the driven side rotating body 120 is biased toward the connecting position by the biasing force of the biasing member 135, the pin 141 of the locking member 140 is rotated on the driven side in order to maintain the released state. The state inserted in the annular part 420 of the body 120 is maintained. Then, when the driving side rotating body 110 and the driven side rotating body 120 are connected again, the pin 141 inserted into the annular portion 420 of the groove 400 is pulled out by the actuator 150. When the pin 141 is pulled out in this manner, the engagement between the pin 141 and the driven side rotating body 120 is released, and the driven side rotating body 120 is moved to the coupling position by the biasing force of the biasing member 135, and is driven by the driving side rotating body 110. The side rotating body 120 is connected again.

  Here, as shown in FIG. 4, in the groove 400 formed on the outer peripheral surface of the driven-side rotator 120, the depth of the annular portion 420 is deeper than the depth of the spiral portion 410. As a result, a step is present in the portion where the spiral portion 410 and the annular portion 420 are connected as shown in FIGS. The stepped side wall 421 restricts the pin 141 that has moved from the spiral portion 410 to the annular portion 420 from returning from the annular portion 420 to the spiral portion 410.

  However, when the pin 141 is displaced from the spiral portion 410 to the annular portion 420 with the rotation of the driven side rotating body 120, the pin 141 is inserted into the deeper annular portion 420, and the pin 141 is inserted into the spiral portion 410 and the annular portion. Since it is necessary to engage with the side wall 421 of the step between 420, the insertion amount of the pin 141 must be increased. A certain amount of time is required to increase the amount of insertion of the pin 141 and engage with the side wall 421 of the step. When the rotational speed of the driving-side rotating body 110 is high, the spiral portion 410 again passes after the pin 141 passes the terminal end 412 of the spiral portion 410 than the time required for engaging the pin 141 with the side wall 421 of the step. In some cases, the time required to reach the phase in which the current exists is shortened. In such a case, the pin 141 cannot be moved to the annular portion 420, and there is a possibility that the state where the connection is released cannot be appropriately maintained. If the size of the actuator 150 that drives the pin 141 is increased, the time required to engage the side wall 421 of the step by increasing the amount of insertion of the pin 141 can be shortened, but the size of the apparatus is increased. It will be.

  In this regard, in the clutch 100 of the present embodiment, as shown in FIGS. 2 and 3, a convex portion 142 is provided at the tip of the pin 141, and a concave groove 415 that accommodates the convex portion 142 is formed on the bottom surface 414 of the spiral portion 410. Provided. In the present embodiment, the bottom surface of the concave groove 415 is formed to the same depth as the bottom surface of the annular portion 420. Moreover, in this embodiment, the convex part 142 is provided in the form along the surface engaged with the side wall 413 of the spiral part 410 in the pin 141.

Next, the configuration of the actuator 150 will be described in detail.
As shown in FIG. 4, the actuator 150 of the present embodiment is an electromagnetic actuator that is driven using the action of a magnetic field generated by energizing a coil 153 housed in the first case 152.

  The first case 152 has a bottomed cylindrical shape, and a fixed core 154 is fixed to the bottom thereof. A coil 153 is disposed inside the first case 152 so as to surround the fixed core 154. That is, in the actuator 150, an electromagnet is configured by the fixed core 154 and the coil 153. A movable core 155 is movably accommodated in a coil 153 of the first case 152 at a position facing the fixed core 154. In addition, the fixed core 154 and the movable core 155 in this embodiment are iron cores.

  A cylindrical second case 158 is fixed to the distal end side (right end side in FIG. 4) of the first case 152. A permanent magnet 159 is fixed to the end of the second case 158 on the first case 152 side so as to surround the periphery of the movable core 155. As described above, the movable core 155 is housed in the first case 152 so that the base end side (left end side in FIG. 4) faces the fixed core 154, while the distal end side (right end side in FIG. 4) is the first end. Two cases 158 protrude outward.

  A ring member 160 is attached to a portion of the movable core 155 accommodated in the second case 158. In the second case 158, a coil spring 161 having one end locked to the second case 158 and the other end locked to the ring member 160 is accommodated in a compressed state.

  The coil spring 161 biases the movable core 155 in the direction in which the movable core 155 protrudes from the second case 158 (right direction in FIG. 4). The distal end side of the movable core 155 that protrudes from the second case 158 is connected to the locking member 140 via the fixing pin 162.

  The locking member 140 has a base end rotatably connected to the movable core 155 and is rotatably supported by a rotation shaft 156. Therefore, the locking member 140 rotates around the rotation shaft 156 that serves as a rotation fulcrum as the movable core 155 moves. Therefore, as indicated by a solid line in FIG. 4, the degree of the movable core 155 protruding from the second case 158 by the urging force of the coil spring 161 increases, so that the pin 141 of the locking member 140 is connected to the driven side rotating body 120. The spiral portion 410 and the annular portion 420 are sequentially inserted.

  When the coil 153 is energized in this state, the fixed core 154 and the movable core 155 are magnetized by the magnetic field generated by the energization, and the movable core 155 is attracted toward the fixed core 154 against the biasing force of the coil spring 161. . At this time, the direction of the magnetic field generated in the coil 153 coincides with the direction of the magnetic field of the permanent magnet 159.

  When the attracted movable core 155 moves in a direction approaching the fixed core 154 (leftward in FIG. 4), the locking member 140 rotates clockwise in FIG. 4, as indicated by a two-dot chain line in FIG. Then, the pin 141 of the locking member 140 is pulled out from the groove 400. That is, the actuator 150 pulls out the pin 141 of the locking member 140 from the groove 400 by attracting the movable core 155 using the magnetic force generated by energizing the coil 153.

  Then, when the attracted movable core 155 moves to a contact position (position indicated by a two-dot chain line in FIG. 4) that contacts the fixed core 154, even if energization is stopped thereafter, the movable core 155 can be moved by the magnetic force of the permanent magnet 159. The state where the lead 155 is in contact with the fixed lead 154 is maintained.

  On the other hand, if the coil 153 is energized with a current in the opposite direction to that when the movable core 155 is attracted to the coil 153 when the movable core 155 is in the contact position indicated by the two-dot chain line in FIG. Produces a reverse magnetic field. As a result, the attractive force of the permanent magnet 159 is weakened, and the movable core 155 is separated from the fixed core 154 by the urging force of the coil spring 161 and moves to the protruding position shown by the solid line in FIG. When the movable core 155 moves from the contact position to the protruding position, the locking member 140 rotates counterclockwise in FIG. 4 and the pin 141 of the locking member 140 is inserted into the groove 400.

  When the movable core 155 is in the protruding position separated from the fixed core 154, the biasing force by the coil spring 161 is larger than the attractive force by the permanent magnet 159. Therefore, if the movable core 155 is separated from the fixed core 154 by energizing the coil 153, the movable core 155 is held at the protruding position even if the energization is stopped thereafter.

  That is, the actuator 150 of the present embodiment switches the coupling state of the clutch 100 by causing the direct current to flow in different directions and moving the movable core 155, while maintaining the coupled state or the uncoupled state. Sometimes it is a self-holding solenoid that does not require energization.

  Next, the effect | action of the clutch 100 concerning this embodiment is demonstrated with reference to FIGS. 5 is a developed view of the groove 400, but for convenience of explanation, in FIG. 5, the inclination and width of the spiral portion 410 are shown larger than the actual one. Further, in FIG. 5, a plurality of pins 141, in which a state when the pin 141 of the locking member 140 relatively moves in the groove 400 while the driven-side rotating body 120 is rotating, is indicated by a two-dot chain line. Shown by. 5 to 9, the boundary between the spiral portion 410 and the annular portion 420 is indicated by a two-dot chain line. A two-dot chain line indicating this boundary is equal to an extension line of the side wall 421 of the step between the spiral portion 410 and the annular portion 420.

  As described above, when the movable core 155 of the actuator 150 is in the contact position, the pin 141 of the locking member 140 protrudes out of the groove 400. At this time, the driven-side rotator 120 is held in the connected position by the urging force of the urging member 135, so the clutch 100 is in the connected state. That is, the clutch 100 transmits the rotation of the driving side rotating body 110 to the output shaft 210. In this state, when the coil 153 of the actuator 150 is energized so as to generate a magnetic field opposite to the direction of the magnetic field of the permanent magnet 159, the movable core 155 moves from the contact position to the protruding position by the biasing force of the coil spring 161. . Then, the pin 141 of the locking member 140 is inserted in the vicinity of the start end 411 of the spiral portion 410 in the groove 400 of the driven side rotating body.

  As shown by the left-pointing arrow in FIG. 5, the urging force of the urging member 135 is constantly acting on the driven side rotating body 120. Therefore, when the pin 141 is inserted in the vicinity of the start end 411 of the spiral portion 410, for example, when the pin 141 is at the position A, the pin 141 and the side wall 413 of the spiral portion 410 are engaged as shown in FIG. To do. Further, the tip portion of the pin 141 and the bottom surface 414 of the spiral portion 410 come into contact with each other, and the convex portion 142 provided at the tip portion of the pin 141 is accommodated in the concave groove 415 provided in the bottom surface 414 of the spiral portion 410. . That is, when the pin 141 is inserted into the spiral portion 410 and the pin 141 comes into contact with the bottom surface 414 of the spiral portion 410, the convex portion 142 of the pin 141 is already inserted deeper than the bottom surface 414 of the spiral portion 410. Will be.

  Thus, the pin 141 slides along the side wall 413 in the spiral portion 410 by rotating the driven side rotating body 120 while maintaining the state where the pin 141 and the side wall 413 of the spiral portion 410 are engaged. . As described above, since the position of the locking member 140 is restricted in the rotation axis direction, the driven-side rotating body 120 moves from the coupling position to the release position as the position of the pin 141 in the spiral portion 410 changes. It moves in the direction of the rotation axis.

  As shown in FIG. 5, as the pin 141 moves relatively in the spiral portion 410 toward the terminal end 412 side, the width of the spiral portion 410 gradually decreases. That is, as the pin 141 moves relatively in the spiral portion 410, the concave groove 415 formed in the spiral portion 410 approaches the annular portion 420, and as shown in FIG. 7, between the annular portion 420 and the concave groove 415. The thickness of the wall present in the wall becomes thinner. FIG. 7 shows a state when the pin 141 is relatively moved to the position B in FIG.

  Further, when the pin 141 moves relatively in the spiral portion 410 and approaches the terminal end 412 and reaches the position C shown in FIG. 5, a wall exists between the annular portion 420 and the groove 415 as shown in FIG. The pin 141 enters the connecting portion 430 where the annular portion 420 and the concave groove 415 are connected. At this time, as shown in FIG. 8, the pin 141 does not come into contact with the bottom surface of the groove 400 for a moment and is in a floating state. However, immediately after that, as indicated by an arrow in FIG. 8, the pin 141 remains in a state of being engaged with the side wall 413 of the spiral portion 410 and falls until it comes into contact with the bottom surface of the concave groove 415 in the connection portion 430.

  As described above, the depth of the concave groove 415 is the same as the depth of the annular portion 420. Therefore, the pin 141 that has fallen to the bottom surface of the concave groove 415 in the connecting portion 430 does not fall when it reaches the terminal end 412 of the spiral portion 410 and enters the annular portion 420, and smoothly enters the annular portion 420. To do.

  In this way, while the pin 141 is engaged with the driven-side rotator 120 and the driven-side rotator 120 rotates with the drive-side rotator 110, the pin 141 relatively moves in the spiral portion 410. The driven-side rotator 120 moves from the connection position toward the release position.

  When the pin 141 enters the annular portion 420, the driven-side rotator 120 reaches the release position. As a result, the rotation of the drive-side rotator 110 is not transmitted to the driven-side rotator 120, and the clutch 100 is disengaged.

  Immediately after the connection between the driven-side rotator 120 and the drive-side rotator 110 is released, the driven-side rotator 120 continues to rotate due to the inertial force while receiving the action of the frictional force generated between the pin 141. As a result, the pin 141 that has entered the annular portion 420 relatively moves in the annular portion 420 as in the positions E, F, and G in FIG.

  In the state where the pin 141 is inserted into the annular portion 420 in this way and the driven side rotating body 120 is rotating, the pin 141 is connected to the spiral portion 410 and the annular portion 420 as shown in FIG. The side wall 421 of the step existing at the boundary is engaged. Therefore, as long as the pin 141 is displaced so as to be pulled out from the annular portion 420 and does not get over this step, the pin 141 is not displaced to the spiral portion 410, and the pin 141 is displaced from the annular portion 420 to the spiral portion 410. Is regulated. FIG. 9 shows a state when the pin 141 is at the position E in FIG.

  The driven-side rotating body 120 continues to rotate due to the inertial force with the pin 141 inserted into the annular portion 420 as described above, but the rotational speed gradually decreases due to the action of the frictional force generated between the driven rotating body 120 and the pin 141, The rotation will eventually stop.

As long as the pin 141 is inserted into the annular portion 420 in this way, the released state in which the clutch 100 is released is maintained.
On the other hand, when the clutch 100 is switched from the released state where the connection is released to the connected state, the coil 153 of the actuator 150 is energized so as to generate a magnetic field having the same direction as the magnetic field of the permanent magnet 159. Then, the movable core 155 is attracted so as to approach the fixed core 154 by the magnetic force generated by energization, the locking member 140 rotates, and the pin 141 of the locking member 140 is completely pulled out from the groove 400.

  Then, the driven-side rotator 120 released from the locking by the locking member 140 moves to the connection position by the urging force of the urging member 135, and the driven-side rotator 120 and the drive-side rotator 110 are connected. The clutch 100 is switched to the connected state.

According to the first embodiment described above, the following effects can be obtained.
(1) In this embodiment, when the pin 141 is inserted into the spiral portion 410 of the driven-side rotor 120 rotating together with the drive-side rotor 110, the pin 141 is engaged with the side wall 413 of the spiral portion 410. Thus, the driven-side rotator 120 rotates, and the driven-side rotator 120 moves from the coupling position to the release position against the urging force of the urging member 135. As a result, the connection between the driving side rotating body 110 and the driven side rotating body 120 is released. That is, a force necessary to release the clutch 100 can be obtained from the rotational force of the driven-side rotator 120. Therefore, the connection can be released with a small force.

  (2) In the present embodiment, a convex portion 142 is provided at the tip of the pin 141, and a concave groove 415 that accommodates the convex portion 142 is provided on the bottom surface 414 of the spiral portion 410. Therefore, as described above, when the pin 141 is inserted into the spiral portion 410 and the pin 141 comes into contact with the bottom surface 414 of the spiral portion 410, the convex portion 142 of the pin 141 is already deeper than the bottom surface 414 of the spiral portion 410. It will be inserted. As a result, even if the insertion amount of the pin 141 is not increased when the pin 141 reaches the terminal end 412 of the spiral portion 410, the convex portion 142 is engaged with the side wall 421 of the step between the spiral portion 410 and the annular portion 420. Come together. Therefore, even when the rotational speed of the driving side rotating body 110 is high, the pin 141 can be engaged with the side wall 421 of the step, and the pin 141 can be connected to the annular portion 420 while suppressing the enlargement of the apparatus. From returning to the spiral portion 410 can be suppressed.

  (3) In this embodiment, the convex part 142 of the pin 141 is provided along the surface which engages with the side wall 413 of the spiral part 410 in the pin 141. By doing in this way, the surface which contact | abuts the side wall 413 of the spiral part 410 in the pin 141 can be made into a wider surface including the side surface of the convex part 142, and when the driven side rotary body 120 rotates, The sliding surface with the side wall 413 of the spiral part 410 becomes wider. Therefore, the contact surface pressure between the pin 141 and the side wall 413 of the spiral portion 410 can be reduced, and wear of the pin 141 can be suppressed.

The clutch is not limited to the configuration shown in the first embodiment. For example, the clutch 100 of the first embodiment can be modified as follows.
-In 1st Embodiment, as shown in FIG. 5, the length L2 of the convex part 142 in the direction orthogonal to a rotating shaft direction is shorter than the length L1 of the connection part 430 of the ditch | groove 415 and the annular part 420. It was. However, the length L2 of the convex portion 142 may be longer than the length L1 of the connecting portion 430.

  When the pin 141 is in the annular portion 420, the pin 141 passes through the connection portion 430 as the driven side rotating body 120 rotates. In this connection part 430, there is no thing separating the concave groove 415 and the annular part 420. At this time, the convex part 142 of the pin 141 inserted into the annular part 420 is caused by the urging force of the urging member 135. There is a possibility of running backward from the screw to the spiral portion 410.

  On the other hand, as described above, when the length L2 of the convex portion 142 is longer than the length L1 of the connecting portion 430, the convex portion 142 is connected when the pin 141 passes through the connecting portion 430. It becomes difficult to enter the spiral portion 410 from the portion 430. Therefore, it is possible to suppress the insertion position of the pin 141 from being displaced from the annular portion 420 to the spiral portion 410, and the driving side rotating body 110 and the driven side rotating body 120 even though the pin 141 is not pulled out from the groove 400. Can be prevented from being connected to each other.

(Second Embodiment)
Next, a second embodiment of the clutch will be described with reference to FIGS.
In the clutch of the second embodiment, the depth of the recessed groove 415 is shallower than that of the clutch of the first embodiment. Since other configurations are the same as those in the first embodiment, the same reference numerals are used to omit redundant description, and the following description will focus on differences.

  FIG. 10 is a development view of the groove 400 in the clutch 100 of the present embodiment. FIG. 10 also shows the inclination and width of the spiral portion 410 larger than the actual one, as in FIG. 5, and the pin 141 of the locking member 140 is in the groove 400 when the driven side rotating body 120 is rotating. A state of relative movement in the interior is shown by displaying a plurality of pins 141 drawn by a two-dot chain line. Further, in FIG. 10, in addition to the positions A, B, C, E, F, and G described with reference to FIG. 5, positions D and H are displayed. The position D is a position between the position C and the position E, and the position H is a position that indicates a state in which the position D is reached beyond the position G.

  In the present embodiment, the depth of the concave groove 415 is slightly shallower than the depth of the concave groove 415 of the first embodiment. Therefore, as shown in FIGS. 11 and 12, the depth of the groove 415 is shallower than the depth of the annular portion 420. Accordingly, a step portion 426 is formed in the connection portion 430 where the concave groove 415 and the annular portion 420 are connected.

Next, the operation of the clutch 100 according to the present embodiment will be described.
Similarly to the first embodiment, in the clutch 100 of the second embodiment, when the pin 141 is inserted into the spiral portion 410, the tip portion of the pin 141 and the bottom surface 414 of the spiral portion 410 come into contact with each other. The convex portion 142 provided at the tip portion is accommodated in the concave groove 415 provided in the bottom surface 414 of the spiral portion 410. That is, when the pin 141 is inserted into the spiral portion 410 and the pin 141 comes into contact with the bottom surface 414 of the spiral portion 410, the convex portion 142 of the pin 141 is already inserted deeper than the bottom surface 414 of the spiral portion 410. Will be.

  Then, the driven side rotating body 120 rotates while maintaining the state where the pin 141 and the side wall 413 of the spiral portion 410 are engaged in this way, so that the pin 141 slides along the side wall 413 in the spiral portion 410. Move, and move relative to position A, position B, and position C. At this time, as the pin 141 relatively moves in the spiral portion 410, the concave groove 415 formed in the spiral portion 410 approaches the annular portion 420, and the wall existing between the annular portion 420 and the concave groove 415 is removed. The thickness gets thinner.

  Further, when the pin 141 moves relatively in the spiral portion 410 and approaches the terminal end 412 and passes the position C, there is no wall between the annular portion 420 and the groove 415, and the pin 141 is connected to the annular portion 420. It enters the connection part 430 to which the concave groove 415 is connected. In the clutch 100 of the present embodiment, the depth of the concave groove 415 is shallower than the depth of the annular portion 420 as described above. Therefore, when the pin 141 enters the connection part 430 and the wall between the annular part 420 and the concave groove 415 no longer exists, the pin 141 contacts the bottom surface of the concave groove 415 as shown in FIG. It will be in the state. FIG. 11 shows a state when the pin 141 is relatively moved to the position D in FIG. 10 immediately before passing the terminal end 412 of the spiral portion 410.

  As described above, the depth of the concave groove 415 is shallower than the depth of the annular portion 420. Therefore, the pin 141 that has dropped to the bottom surface of the concave groove 415 in the connection portion 430 passes through the terminal end 412 of the spiral portion 410 and enters the annular portion 420, so that the difference in depth between the concave groove 415 and the annular portion 420 is reached. Falls by the amount of and enters the annular portion 420.

  When the pin 141 enters the annular portion 420, the driven-side rotator 120 reaches the release position. As a result, the rotation of the drive-side rotator 110 is not transmitted to the driven-side rotator 120, and the clutch 100 is disengaged.

  Immediately after the connection between the driven-side rotator 120 and the drive-side rotator 110 is released, the driven-side rotator 120 continues to rotate due to the inertial force while receiving the action of the frictional force generated between the pin 141. As a result, the pin 141 that has entered the annular portion 420 relatively moves in the annular portion 420 as in the positions E, F, G, and H in FIG.

  When the driven rotary body 120 rotates with the pin 141 inserted into the annular portion 420 as described above, the stepped side wall 421 that exists at the boundary between the spiral portion 410 and the annular portion 420 is provided. Is engaged. Therefore, as long as the pin 141 is displaced so as to be pulled out from the annular portion 420 and does not get over this step, the pin 141 is not displaced to the spiral portion 410, and the pin 141 is displaced from the annular portion 420 to the spiral portion 410. Is regulated.

  Further, as shown in FIG. 12, since a step portion 426 exists at the boundary between the annular portion 420 and the concave groove 415, when the pin 141 inserted into the annular portion 420 passes through the connecting portion 430, The convex part 142 comes to engage with the step part 426.

According to the second embodiment described above, the following effect (4) can be obtained in addition to the same effects as (1) to (3) in the first embodiment.
(4) When the pin 141 that has entered the annular portion 420 passes through the connecting portion 430, the convex portion 142 of the pin 141 comes into engagement with the step portion 426 that exists at the boundary between the annular portion 420 and the concave groove 415. Therefore, the pin 141 can be prevented from returning to the spiral portion 410 when passing through the connection portion 430.

(Third embodiment)
Next, a third embodiment of the clutch will be described with reference to FIG.
As shown in FIG. 13, the clutch 100 of the third embodiment is different from the configuration of the first embodiment in the shape of the convex portion 142 of the pin 141 and the shape of the concave groove 415 in the groove 400. Since other configurations are the same as those of the first embodiment, the same reference numerals as those of the first embodiment are used for the same configurations, and descriptions thereof are omitted.

  When the pin 141 having the shape as shown in FIG. 6 shown in the first embodiment is inserted into the spiral portion 410, if the tip of the convex portion 142 comes into contact with the bottom surface 414 of the spiral portion 410, There is a possibility that the convex portion 142 cannot be smoothly inserted into the concave groove 415.

  In the present embodiment, as shown in FIG. 13, the convex portion 142 of the pin 141 is provided with a tapered surface 142 a that is inclined so that the convex portion 142 becomes thinner toward the tip. And this taper surface 142a is formed in the surface contact | abutted with the side wall 415a of the ditch | groove 415 in the convex part 142. FIG.

In this embodiment, the side wall 415a of the groove 415 is formed by a tapered surface parallel to the tapered surface 142a of the convex portion 142.
That is, the inclination angle of the side wall 415a with respect to the side wall 413 of the spiral portion 410 and the inclination angle of the tapered surface 142a of the convex portion 142 with respect to the surface of the pin 141 that engages with the side wall 413 of the spiral portion 410 are equal. .

Next, the operation of the clutch 100 according to the present embodiment will be described.
When the pin 141 is inserted into the spiral portion 410, the convex portion 142 of the pin 141 approaches the bottom surface 414 of the spiral portion 410 as the pin 141 is inserted. At this time, when the position of the pin 141 in the rotation axis direction with respect to the driven-side rotator 120 is shifted to the left in FIG. 13, first, the tapered surface 142 a of the convex portion 142 of the pin 141 and the concave groove 415 of the spiral portion 410. Side wall 415a abuts.

  As shown in FIG. 13, the tapered surface 142a of the convex portion 142 and the side wall 415a of the concave groove 415 are inclined at an equal angle. Therefore, the taper surface 142a of the projecting portion 142 and the side wall 415a of the concave groove 415 are in close contact with each other. As a result, when the pin 141 enters toward the bottom surface 414 of the spiral portion 410, the convex portion 142 is inclined to the side wall 415a while maintaining the state where the tapered surface 142a of the convex portion 142 is in close contact with the side wall 415a of the concave groove 415. Along the side wall 413 side of the spiral portion 410.

According to the third embodiment described above, the following effect (5) can be obtained in addition to the effects equivalent to (1) to (3) in the first embodiment.
(5) When the tapered surface 142 a of the convex portion 142 and the side wall 415 a of the concave groove 415 are formed, the pin 141 is attached to the pin 141 by the force in the direction in which the pin 141 is inserted, and the side wall 413 of the spiral portion 410. A force in the direction of urging toward is applied. Therefore, the convex portion 142 of the pin 141 can be brought into close contact with the side wall 415 a of the concave groove 415, and the pin 141 can be brought into close contact with the side wall 413 of the spiral portion 410.

In addition, the clutch for solving the said subject is not limited to the structure shown to said each said embodiment, It can also implement with the following forms which changed this suitably.
In the third embodiment, the tapered surface 142a is provided on the surface of the pin 141 that contacts the side wall 415a of the concave groove 415. However, there is a problem in inserting the convex portion 142 of the pin 141 into the groove 400. If not, the convex portion 142 of the pin 141 may be formed in any shape. For example, as shown in FIG. 14, the convex portion 142 has not only a tapered surface 142 a at the tip of the surface that contacts the side wall 415 a of the concave groove 415, but also the tip of the surface that contacts the side wall 413 of the spiral portion 410. It is good also as a structure which provided the taper surface 142b.

  In this case, the relative positions of the pin 141 and the driven-side rotator 120 in the rotation axis direction are shifted, and the tip of the convex portion 142 contacts the bottom surface 414 of the spiral portion 410 when the pin 141 is inserted into the spiral portion 410. Even so, the pin 141 and the driven-side rotator 120 slide along the tapered surface 142a, and the mutual positional relationship can be shifted in the direction of the rotation axis. Further, as shown in FIG. 14, the relative position of the pin 141 and the driven side rotating body 120 in the rotational axis direction is shifted, and the tip of the convex portion 142 rotates on the driven side when the pin 141 is inserted into the spiral portion 410. Even if it contacts the outer peripheral surface of the body 120, the pin 141 and the driven side rotating body 120 slide along the tapered surface 142b, and the positional relationship between them can be shifted in the direction of the rotation axis. Therefore, it is possible to correct the deviation in the rotation axis direction of the pin 141 and the driven side rotating body 120 and guide the convex portion 142 to the inside of the spiral portion 410.

  Further, only the tapered surface 142b may be provided without providing the tapered surface 142a. Also in this case, the relative positions of the pin 141 and the driven-side rotator 120 in the rotation axis direction are shifted, and when the pin 141 is inserted into the spiral portion 410, the tip of the convex portion 142 is the outer peripheral surface of the driven-side rotator 120. Even if it contacts, the pin 141 and the driven-side rotating body 120 slide along the tapered surface 142b, and the positional relationship between them can be shifted in the direction of the rotation axis. Therefore, it is possible to correct the deviation in the rotation axis direction of the pin 141 and the driven side rotating body 120 and guide the convex portion 142 to the inside of the spiral portion 410.

The same effect can also be obtained by making the tip of the convex portion 142 hemispherical or conical.
In each of the above embodiments, the concave groove 415 is provided only in the spiral portion 410. However, a concave groove may be provided also in the annular portion 420. In this case, when the pin 141 moves relatively in the annular portion 420 and passes through the connecting portion 430, the convex portion 142 of the pin 141 is accommodated in the concave groove formed in the annular portion 420. . Therefore, in addition to the effects equivalent to (1) to (3), an effect of suppressing the pin 141 from returning to the spiral portion 410 when passing through the connection portion 430 can be obtained.

  In each of the above embodiments, the convex portion 142 of the pin 141 is provided along a surface that engages with the spiral portion 410 of the pin 141. However, if the pin 141 is inserted into the spiral portion 410 and the convex portion 142 of the pin 141 is inserted deeper than the bottom surface 414, the convex portion 142 is not necessarily provided at the above position. There is no need. For example, the convex portion 142 may be provided at the center position of the pin 141 so that the distance from the both side surfaces of the pin 141 to the convex portion 142 is equal. When the convex portion 142 is provided at such a position, the concave groove 415 of the spiral portion 410 is provided at a position between the side wall 413 of the spiral portion 410 and the side wall 421 of the step so as to accommodate the convex portion 142. It is good to do so.

  Even when the pin 141 is inserted into the spiral portion 410, the tip of the convex portion 142 of the pin 141 contacts the bottom surface of the concave groove 415, and the bottom surface 414 of the spiral portion 410 does not contact the pin 141. Good. Even in such a configuration, when the pin 141 is inserted into the spiral portion 410 and engaged with the side wall 413, the convex portion 142 of the pin 141 is inserted deeper than the bottom surface 414 of the spiral portion 410. . Therefore, similarly to the above embodiment, when the pin 141 reaches the terminal end 412 of the spiral portion 410, the stepped side wall 421 between the spiral portion 410 and the annular portion 420 does not increase even if the insertion amount of the pin 141 is increased. The convex part 142 comes to be engaged. Therefore, even when the rotational speed of the driving side rotating body 110 is high, the pin 141 can be engaged with the side wall 421 of the step, and the pin 141 can be connected to the annular portion 420 while suppressing the enlargement of the apparatus. From returning to the spiral portion 410 can be suppressed.

  -The shape of the pin 141 can be changed arbitrarily. For example, as shown in FIG. 15, it is possible to adopt a configuration in which a part of a pin 141 having a circular cross section protrudes to form a convex portion 142.

The number of urging members 135 can be arbitrarily changed. For example, the driven side rotating body can be urged by one urging member 135.
The urging member 135 only needs to urge the driven-side rotator 120 toward the coupling position, and is not limited to the compression coil spring as described above. For example, a configuration in which a tension spring that pulls the driven-side rotator 120 toward the coupling position is applied as the biasing member may be employed.

  The actuator 150 is not limited to a self-holding solenoid, and may be a solenoid in which the pin 141 of the locking member 140 is inserted into the groove 400 only while the coil is energized. According to this configuration, since the coupling of the clutch 100 is released only when the coil is energized, the clutch 100 is in the coupled state when the coil cannot be energized. Therefore, the pump 200 can be driven even when the actuator 150 is malfunctioning.

  The actuator 150 is not limited to a solenoid, and the pin 141 may be inserted and extracted by an actuator other than the solenoid, such as a hydraulic actuator. In this case as well, the mechanism for releasing the connection of the clutch 100 using the engagement between the groove 400 of the driven-side rotating body 120 and the pin 141 of the locking member 140 remains the same, so that the connection of the clutch 100 is released. Can be obtained from the rotational force of the driven-side rotator 120. Therefore, the connection can be released with a small force.

The configuration of the clutch 100 is not limited to that which transmits the driving force via the sphere 130. The clutch 100 may be a crimp type clutch.
For example, the opposing surfaces of the drive-side rotator 110 and the driven-side rotator 120 are tapered surfaces parallel to each other that are inclined with respect to the rotation axis direction, and are used as pressure contact surfaces. It is also possible to employ a configuration in which the driven-side rotator 120 and the drive-side rotator 110 are coupled by pressing these pressure-contact surfaces by moving them.

  In each of the above embodiments, the clutch 100 that switches the transmission state of power from the crankshaft 250 to the pump 200 is illustrated, but a clutch that is disposed between another auxiliary machine such as a compressor or an oil pump and the crankshaft 250. This clutch configuration can also be applied. The clutch configuration is not limited to switching the transmission state of power from the crankshaft 250 but can be applied as a clutch for switching the transmission state of power from another power source.

  In each of the above embodiments, the configuration in which the position of the locking member 140 in the rotation axis direction is restricted is shown. However, by engaging the pin 141 of the locking member 140 with the groove 400, the clutch 100 is released. The locking member 140 may be allowed to move in the direction of the rotation axis as long as it can be moved.

  DESCRIPTION OF SYMBOLS 100 ... Clutch, 110 ... Drive side rotary body, 111 ... Circular groove, 120 ... Driven side rotary body, 121 ... Engagement part, 122 ... Large diameter part, 123 ... Small diameter part, 124 ... Recessed part, 125 ... Housing recessed part, 127 ... Sphere housing groove, 128 ... holding part, 130 ... sphere, 135 ... biasing member, 140 ... locking member, 141 ... pin, 142 ... convex part, 142a, 142b ... tapered surface, 150 ... actuator, 152 ... first Case: 153 ... Coil, 154 ... Fixed core, 155 ... Movable core, 156 ... Rotating shaft, 158 ... Second case, 159 ... Permanent magnet, 160 ... Ring member, 161 ... Coil spring, 162 ... Fixed pin, 200 ... Pump, 210 ... output shaft, 211 ... locking projection, 212 ... straight spline, 220 ... impeller, 250 ... crankshaft, 260 ... drive side pulley, 270 ... driven pulley 280 ... Belt, 300 ... Housing, 310 ... Housing, 320 ... Support member, 330 ... First bearing, 340 ... Second bearing, 400 ... Groove, 410 ... Spiral part, 411 ... Start end, 412 ... End, 413 ... Side wall 414 ... bottom surface, 415 ... concave groove, 415a ... side wall, 420 ... annular portion, 421 ... side wall, 426 ... stepped portion, 430 ... connection portion.

Claims (7)

A driving side rotating body;
A groove having a spiral portion having a rotation axis of the driving side rotating body as a central axis and an annular portion deeper than the spiral portion and extending over the entire circumference perpendicular to the rotation axis direction of the rotation shaft provided on a surface, and the driven-side rotating member is between a release position connected to the connection position connected to the driving side rotational member is released movable along the rotation axis direction,
A biasing member that biases the driven-side rotating body from the release position toward the connection position;
A pin that can be inserted into and removed from the groove;
With
When releasing the connection, the pin is inserted into the spiral portion to move the driven rotary body to the release position,
The spiral portion extends toward the annular portion and the top surface of the spiral portion constitutes the bottom surface of the spiral portion, and the annular portion is opposite to the spiral wall in the rotation axis direction. And a groove adjacent to the spiral wall,
The pin projecting portion at the distal end portion inserted into Oite the spiral portion is provided, when the distal end portion of the pin is inserted into the helical portion, the protrusion is received in the groove,
At the end of the spiral wall on the side of the annular part, a connecting part for connecting the concave groove and the annular part is formed,
In the connecting portion, the concave groove and the annular portion are continuous so that the convex portion can displace the concave groove and the annular portion . In the pin, the pin along the surface on which the pin is engaged with the side wall of the helical portion when being inserted into the spiral portion, the convex portion is set vignetting,
2. The clutch according to claim 1 , wherein a side wall of the spiral portion is a side wall of the concave groove that is away from the annular portion in the rotation axis direction . The clutch according to claim 1, wherein the convex portion has a tapered surface at a distal end and becomes narrower toward the distal end. The clutch according to claim 3, wherein the convex portion has the tapered surface at a tip of a surface facing the spiral wall when the convex portion is accommodated in the concave groove . Before SL said helical wall facing the tapered surface, the clutch according to claim 4 which is formed by a tapered surface inclined at an angle equal to the tapered surface. The convex portion has the tapered surface at the tip of the surface facing the side wall of the concave groove when the convex portion is accommodated in the concave groove ,
The clutch according to claim 3 , wherein the side wall of the concave groove is a side wall of the concave groove on a side away from the annular portion in the rotation axis direction . The clutch according to any one of claims 1 to 6, wherein a length of the convex portion in a direction orthogonal to the rotation axis direction is longer than a length of the connection portion in a direction orthogonal to the rotation axis direction. .