JP6584873B2 - Electric actuator - Google Patents

Description

  The present invention relates to an electric actuator.

  2. Description of the Related Art Conventionally, an apparatus for switching a vehicle clutch or the like is known. For example, in the clutch operating device of Patent Document 1, a screw is rotated by an electric motor, and a nut block that is screw-coupled to the screw linearly moves, whereby the operating rod moves linearly. Thereby, the clutch is switched.

JP 2012-112515 A

  However, the apparatus as described above has a problem that the efficiency of converting the rotation of the screw into the linear movement of the nut block is relatively low. Due to this problem, in order to obtain a force sufficient to move the actuating rod linearly, it is necessary to enlarge the electric motor and increase the rotational torque transmitted to the screw. Therefore, there is a problem that the entire apparatus becomes large.

  In view of the above problems, an aspect of the present invention has an object to provide an electric actuator capable of linearly driving an operating lever portion by a motor while suppressing an increase in size.

An electric actuator according to one aspect of the present invention includes a motor having a motor shaft extending in a direction parallel to a central axis extending in the axial direction, and is coupled to the motor shaft and moves in the axial direction as the motor shaft rotates. A movable member, and an electric actuator for driving a vehicle-side connecting portion that is movable along the axial direction, wherein the movable member has a through-hole through which the motor shaft is passed, and the main body portion An operating lever portion that extends in a direction crossing the axial direction and is attached to the vehicle-side coupling portion, and the motor shaft is a spiral groove located on an outer peripheral surface of the motor shaft. The main body portion has a second spiral groove that is a spiral groove located on an inner surface of the through hole, the first spiral groove, the second spiral groove, and in front A plurality of spherical balls located between the first spiral groove second spiral grooves, the ball screw is configured, the vehicle-side coupling part is a vehicle-side shaft extending in the axial direction, and the vehicle The shaft has a first groove portion that is located on the outer peripheral surface of the vehicle-side shaft and extends in a direction orthogonal to the axial direction, and a tip end of the operating lever portion protrudes in a direction orthogonal to the axial direction. A first protrusion that is engaged, and a second protrusion that extends in parallel with the first protrusion and sandwiches the vehicle-side shaft between the first protrusion and the second protrusion. Is an urging member.

  According to one aspect of the present invention, in the electric actuator, the operating lever portion can be linearly driven by the motor while suppressing an increase in size.

FIG. 1 is a cross-sectional view showing the electric actuator of the present embodiment. FIG. 2 is a perspective view showing the vehicle side shaft. FIG. 3 is a front view showing the movable member of the present embodiment. FIG. 4 is a block diagram showing the configuration of the electric actuator of the present embodiment. FIG. 5 is a front view showing a movable member which is another example of the present embodiment.

  Hereinafter, an electric actuator according to an embodiment of the present invention will be described with reference to the drawings. In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the X-axis direction is a direction parallel to the central axis J1 extending in the axial direction shown in FIG. The Z-axis direction is a direction orthogonal to the Y-axis direction and is the vertical direction in FIG. The Y-axis direction is a direction orthogonal to both the Y-axis direction and the Z-axis direction.

In this specification, the right side (+ X side) in FIG. 1 in the X-axis direction is referred to as “front side”, and the left side (−X side) is referred to as “rear side”. Further, the upper side (+ Z side) in FIG. 1 in the Z-axis direction is simply referred to as “upper side”, and the lower side (−Z side) is simply referred to as “lower side”. In addition, the front-back direction and the up-down direction do not indicate a positional relationship or direction when incorporated in an actual device. A direction parallel to the central axis J1 (X-axis direction) is referred to as an “axial direction”, a radial direction centered on the central axis J1 is simply referred to as a “radial direction”, and a circumferential direction centered on the central axis J1 ( θ _X direction) simply referred to as a "circumferential direction".

  As shown in FIG. 1, the electric actuator 10 is attached to the vehicle body BD of the vehicle C. The electric actuator 10 drives the vehicle side connecting part CS1 of the vehicle C. The vehicle side connection part CS1 is movable along the axial direction. The vehicle side connecting part CS1 is, for example, a vehicle side shaft extending in the axial direction. Hereinafter, the vehicle side connecting part CS1 is referred to as a vehicle side shaft CS1.

  The vehicle-side shaft CS1 is a shaft used for switching the clutch of the vehicle C, for example. As shown in FIG. 2, the vehicle-side shaft CS1 has a first groove part CSa and a second groove part CSb. 1st groove part CSa and 2nd groove part CSb are located in the outer peripheral surface of vehicle side shaft CS1. The first groove portion CSa and the second groove portion CSb are recessed from the outer peripheral surface of the vehicle side shaft CS1 toward the vehicle side central axis J2 of the vehicle side shaft CS1.

  The first groove portion CSa and the second groove portion CSb extend in the direction orthogonal to the axial direction, that is, in the vertical direction in the examples of FIGS. The second groove CSb is located on the opposite side of the first groove CSa with the vehicle-side shaft CS1 interposed therebetween. The internal shape of the first groove portion CSa and the internal shape of the second groove portion CSb are substantially rectangular when viewed from above. The internal shape of the first groove CSa and the internal shape of the second groove CSb may be semicircular, elliptical, or polygonal when viewed from above. Also good.

  As shown in FIG. 1, the electric actuator 10 includes an actuator housing 30, a motor 20 having a motor shaft 21 extending in a direction parallel to the central axis J <b> 1, a bearing 70, a movable member 40, and a plurality of spherical balls 44. A sensor unit 50, a cover 60, a motor driving device 11, a control device 12, and a communication device 13.

  The actuator housing 30 has a box shape that opens downward. The actuator housing 30 is fixed to the vehicle body upper surface BDa that is the upper surface of the vehicle body BD. The lower opening of the actuator housing 30 communicates with a mounting hole BDb that penetrates the vehicle body BD in the vertical direction. The actuator housing 30 accommodates the movable member 40.

  The actuator housing 30 includes a front side wall part 31 that is a front side wall part, a cylindrical bearing holding part 32 that protrudes rearward from the front side wall part 31, and a rear side wall part 33 that is a rear side wall part. Have.

  The motor 20 is fixed to the rear surface of the rear side wall 33 of the actuator housing 30. The motor shaft 21 protrudes into the actuator housing 30 through a shaft through hole 33a that passes through the rear side wall portion 33 in the front-rear direction. As shown in FIG. 4, the motor 20 includes a motor main body 20a and a rotation sensor 20b. The motor shaft 21 is provided in the motor body 20a. The rotation sensor 20b detects the rotational position of the rotor having the motor shaft 21 of the motor body 20a.

  As shown in FIG. 1, the motor shaft 21 has a screw shaft portion 21a. A first spiral groove 21b, which is a spiral groove, is provided on the outer peripheral surface of the screw shaft portion 21a. That is, the motor shaft 21 has a first spiral groove 21 b located on the outer peripheral surface of the motor shaft 21. The motor shaft 21 rotates around the central axis J1.

  The bearing 70 is held by the bearing holding portion 32. That is, the bearing 70 is held by the actuator housing 30. The bearing 70 supports the motor shaft 21 rotatably. More specifically, the bearing 70 supports the tip portion 21 c of the motor shaft 21. The bearing 70 is disposed on the front end side (+ X side) of the motor shaft 21 with respect to the movable member 40 in the axial direction.

  The movable member 40 includes a main body portion 41, an operation lever portion 42 attached to the vehicle-side shaft CS1, and a convex portion 43. As shown in FIGS. 1 and 3, the main body 41 has a cylindrical shape having a through hole 41 a through which the motor shaft 21 is passed. The through hole 41a penetrates the main body 41 in the axial direction. The inner surface of the through hole 41a is cylindrical with the central axis J1 as the center.

  The main body 41 has a second spiral groove 41b. The second spiral groove 41b is a spiral groove located on the inner surface of the through hole 41a. A plurality of spherical balls 44 are located between the first spiral groove 21b and the second spiral groove 41b.

  A ball screw 80 is configured by the first spiral groove 21 b, the second spiral groove 41 b, and the plurality of balls 44. Thereby, the movable member 40 is connected to the motor shaft 21 and moves in the axial direction as the motor shaft 21 rotates.

  Since the connecting portion between the motor shaft 21 and the movable member 40 is the ball screw 80, the frictional force between the motor shaft 21 and the movable member 40 can be reduced. Thereby, the rotational torque of the motor 20 can be efficiently converted into the driving force in the axial direction of the movable member 40. Therefore, even when the rotational torque of the motor 20 is relatively small, it is possible to sufficiently obtain the axial driving force transmitted to the vehicle-side shaft CS1 via the operating lever portion 42. Thereby, the motor 20 can be reduced in size, and as a result, the electric actuator 10 can be reduced in size.

  In addition, since the frictional force between the motor shaft 21 and the movable member 40 can be reduced, it is possible to suppress wear of the first spiral groove 21b and the second spiral groove 41b due to friction. Therefore, it can suppress that the connection part of the motor shaft 21 and the movable member 40 wears out, and can improve the durability of the electric actuator 10 as a result.

  Moreover, since the rotational torque of the motor 20 can be made relatively small, the energy consumption of the motor 20 can be reduced.

  Further, since the motor shaft 21 is supported by the bearing 70, the motor shaft 21 can be supported at both the front side and the rear side of the movable member 40 by the motor main body 20 a and the bearing 70. Therefore, the motor shaft 21 can be stably rotated with high axial accuracy. As a result, the movable member 40 can be moved stably in the axial direction. Thereby, the frictional force between the motor shaft 21 and the movable member 40 can be further reduced, and as a result, the motor 20 can be further downsized.

  In the ball screw 80, the plurality of balls 44 pass through a spiral path 80a formed by opposing the first spiral groove 21b and the second spiral groove 41b. In the spiral passage 80a, the plurality of balls 44 contact the inner surface of the first spiral groove 21b and the inner surface of the second spiral groove 41b. The plurality of balls 44 move in the circumferential direction along the spiral passage 80a while rolling. The rotation of the motor shaft 21 can be converted into the movement of the movable member 40 in the axial direction by moving the spiral passage 80 a while the balls 44 are rolling.

  As shown in FIG. 1, the ball screw 80 includes, for example, a ball circulation unit 81. The ball circulation portion 81 is provided in the main body portion 41. The ball circulation portion 81 is a passage that connects both ends of the spiral passage 80a. The ball 44 that has reached one end of the spiral passage 80a passes through the ball circulating portion 81 and moves to the other end of the spiral passage 80a. Thus, the ball 44 can circulate in the spiral passage 80a.

  In the present specification, the ball screw is not limited to the ball screw having the above-described configuration, and may be any known ball screw.

  The operating lever portion 42 extends from the main body portion 41 in a direction crossing the axial direction. In more detail, the operation lever part 42 is extended from the main-body part 41 to an up-down direction among the directions orthogonal to an axial direction, for example.

  As shown in FIG. 3, the operating lever portion 42 includes an operating lever portion main body 42 a, a first projecting portion 45, and a second projecting portion 46. The actuating lever portion main body 42 a has a substantially rectangular parallelepiped shape that protrudes downward from the lower end of the main body portion 41.

  The 1st protrusion part 45 and the 2nd protrusion part 46 are substantially square pillar shape. The 1st protrusion part 45 and the 2nd protrusion part 46 protrude below from the lower end of the action | operation lever part main body 42a. In other words, the distal end of the operating lever portion 42 has a first protrusion 45 and a second protrusion 46 that protrude in a direction orthogonal to the axial direction (Z-axis direction).

  The first protrusion 45 is engaged with the first groove CSa. The second protrusion 46 sandwiches the vehicle-side shaft CS <b> 1 with the first protrusion 45. Thereby, the operation lever part 42 is attached to the vehicle side shaft CS1. The position of the operating lever portion 42 in the axial direction with respect to the vehicle-side shaft CS1 is fixed by the first protrusion 45 engaging the first groove CSa.

  For example, there is a case where an electric actuator to which the vehicle side shaft is attached is attached to the vehicle after the vehicle side shaft is fixed to the operation lever portion. In this case, since it is necessary to take out the vehicle side shaft provided in the vehicle body and fix it to the operating lever part of the electric actuator, there is a problem that the workability of mounting the electric actuator is lowered. Further, the structure for fixing the vehicle-side shaft to the operating lever portion is complicated, and there is a problem that it takes time to assemble.

  On the other hand, according to the present embodiment, the operating lever portion 42 is inserted into the vehicle body BD through the mounting hole BDb, and the first protrusion 45 is engaged with the first groove CSa from above. The operating lever portion 42 can be attached to the vehicle side shaft CS1. Thereby, the movable member 40 can be easily attached to the vehicle side shaft CS1 without taking out the vehicle side shaft CS1 from the vehicle body BD. Therefore, it is possible to improve the mounting workability of attaching the electric actuator 10 to the vehicle body BD while suppressing the time and effort required for assembling the vehicle side shaft CS1 and the operating lever portion 42.

  In addition, when a deviation occurs between the axial position of the operating lever portion 42 and the axial position of the first groove portion CSa, the installation operator sets the axial position of the operating lever portion 42 to the axis of the first groove portion CSa. It is necessary to match the position of the direction. At this time, since the connecting portion between the motor shaft 21 and the movable member 40 is the ball screw 80, the frictional force between the motor shaft 21 and the movable member 40 is relatively small, and the movable member 40 is pivoted with respect to the motor shaft 21. The force required to move in the direction is relatively small. Therefore, the attachment operator can easily manually adjust the axial position of the operating lever portion 42 to the axial position of the first groove portion CSa, and easily attach the operating lever portion 42 to the vehicle-side shaft CS1. be able to.

  The second protrusion 46 is engaged with the second groove CSb. Therefore, the first protrusion 45 and the second protrusion 46 are engaged with the motor shaft 21, and the operation lever portion 42 can be attached to the motor shaft 21 more stably.

  The first protrusion 45 has a first inclined surface 45a. The first inclined surface 45 a is disposed at the end of the lower end of the first protrusion 45 on the second protrusion 46 side (+ Y side). The 1st inclined surface 45a inclines in the direction which leaves | separates from the 2nd protrusion part 46, as it goes below.

  The 2nd protrusion part 46 has the 2nd inclined surface 46a. The second inclined surface 46 a is disposed at the end of the lower end of the second protrusion 46 on the first protrusion 45 side (−Y side). The second inclined surface 46a is inclined in a direction away from the first protrusion 45 as it goes downward.

  By providing the first inclined surface 45 a and the second inclined surface 46 a, the distance between the first protruding portion 45 and the second protruding portion 46 can be increased at the lower end of the operating lever portion 42. Thereby, when attaching the operation lever part 42 close to the vehicle side shaft CS1 from the upper side, the vehicle side shaft CS1 is easily sandwiched between the first protrusion 45 and the second protrusion 46.

  The convex portion 43 protrudes from the main body portion 41 in the opposite direction (+ Z direction) to the operating lever portion 42. In FIG. 3, the convex portion 43 projects upward from the main body portion 41. The convex portion 43 is disposed at the upper end of the main body portion 41. As shown in FIG. 1, at least a part of the convex portion 43 is at the same position as the operating lever portion 42 in the axial direction. In FIG. 1, the entire convex portion 43 overlaps the operating lever portion 42 in the vertical direction. The convex portion 43 has a quadrangular prism shape. In addition, the shape of the convex part 43 is not specifically limited, A hemispherical shape or a polygonal column shape may be sufficient.

  The outer shape of the sensor unit 50 is a substantially rectangular parallelepiped shape extending in the axial direction. The sensor unit 50 is disposed on the upper side of the motor 20. The sensor unit 50 includes a sensor cover 51, a position detection sensor 52, a moving unit 53, and a lid unit 56. That is, the electric actuator 10 includes a sensor cover 51, a position detection sensor 52, a moving unit 53, and a lid unit 56.

  The sensor cover 51 has a rectangular tube shape extending in the axial direction and having an opening 51b on the rear side. A front portion of the sensor cover 51 is disposed inside the actuator housing 30. The sensor cover 51 is fixed to the inner surface of the actuator housing 30. A lid 56 is fitted into the opening 51b.

  The position detection sensor 52 detects the position of the movable member 40 in the axial direction. The position detection sensor 52 is disposed at a position facing the convex portion 43 in the vertical direction. The position detection sensor 52 detects the position of the convex portion 43 in the axial direction.

  As described above, since at least a part of the convex portion 43 is in the same position as the operating lever portion 42 in the axial direction, the axial position of the operating lever portion 42 is determined by detecting the axial position of the convex portion 43. It can be detected. Accordingly, the position of the movable member 40 in the axial direction can be easily detected with high accuracy by the position detection sensor 52.

  The position detection sensor 52 is a magnetic sensor such as a Hall element, for example. In this case, the convex portion 43 is provided with a sensor magnet.

  The moving part 53 is accommodated in the sensor cover 51. The moving unit 53 moves the position detection sensor 52 in the axial direction. The moving part 53 includes a nut 54 a, a movable part 54 b, and a spring 55. The nut 54 a is fixed to the inner surface of the sensor cover 51. The nut 54 a is disposed on the rear side of the position detection sensor 52.

  The movable part 54b is, for example, a screw extending in the axial direction. The movable portion 54b is fastened to the nut 54a and penetrates the nut 54a in the axial direction. The front end portion of the movable portion 54b is in contact with the rear end portion (one side in the axial direction) of the position detection sensor 52. Since the movable portion 54b, which is a screw, is fastened to a nut 54a fixed to the sensor cover 51, it can move in the axial direction by rotating around the axial direction.

  The spring 55 is disposed on the front side of the position detection sensor 52. The front end of the spring 55 is in contact with the inner surface of the sensor cover 51. The rear end of the spring 55 is in contact with the front end (the other side in the axial direction) of the position detection sensor 52. The spring 55 biases the position detection sensor 52 from the front side toward the rear side.

  By rotating the movable part 54b in one direction around the axial direction and moving it forward, the position detection sensor 52 can be pushed forward by the movable part 54b. Thereby, the position detection sensor 52 can be moved to the front side. On the other hand, by rotating the movable portion 54b in the other direction around the axial direction and moving the movable portion 54b to the rear side, the position detection sensor 52 biased by the spring 55 moves to the rear side along with the movement of the movable portion 54b. Thus, the axial position of the position detection sensor 52 can be adjusted by rotating the movable portion 54b around the axial direction.

  Since the sensor cover 51 has the opening 51b, for example, a screwdriver or the like is inserted into the sensor cover 51 from the opening 51b with the lid 56 removed, and the movable part 54b, which is a screw, is moved around the axial direction. Can be rotated. Therefore, it is easy to adjust the position of the position detection sensor 52 in the axial direction after the electric actuator 10 is attached to the vehicle body BD.

  After the electric actuator 10 is attached to the vehicle body BD, the adjuster confirms the output of the position detection sensor 52 in a state where the movable member 40 is at the initial position. The adjuster determines whether the output of the position detection sensor 52 is within an appropriate range with respect to the initial position of the movable member 40. If the output of the position detection sensor 52 is not within an appropriate range, the adjuster rotates the movable portion 54b around the axial direction while confirming the output of the position detection sensor 52, and the axis of the position detection sensor 52 Change the direction position. In this way, the adjuster adjusts the position of the position detection sensor 52 in the axial direction.

  The cover 60 is accommodated in the actuator housing 30. The cover 60 has a cylindrical shape that surrounds the radially outer side of the motor shaft 21. Therefore, contamination can be prevented from entering the ball screw 80 from within the vehicle body BD or the like. Thereby, it can suppress that rolling of the ball | bowl 44 is inhibited by a contamination entering the helical channel | path 80a. Therefore, it can suppress that rotation of the motor shaft 21 with respect to the movable member 40 is inhibited. In addition, contamination is a metal piece etc., for example.

  The cover 60 includes bellows 61 and 62. Therefore, the bellows 61 and 62 expand and contract in the axial direction along with the movement of the movable member 40 in the axial direction, so that the connecting portion between the motor shaft 21 and the movable member 40, regardless of the axial position of the movable member 40, that is, It is easy to surround the radially outer side of the ball screw 80. Therefore, it is possible to further suppress contamination from entering the ball screw 80.

  The bellows 61 is attached to the rear side of the main body 41. The front end of the bellows 61 is fitted into the main body 41 from the outside in the radial direction. The rear end portion of the bellows 61 is fixed to the rear side wall portion 33. The bellows 61 surrounds the shaft through hole 33a in the circumferential direction. Therefore, contamination in the vehicle body BD or the like can be prevented from entering the motor 20 from the shaft through hole 33a.

  The bellows 62 is attached to the front side of the main body 41. The rear end of the bellows 62 is fitted to the main body 41 from the outside in the radial direction. The front end portion of the bellows 62 is attached to the bearing holding portion 32. The front end portion of the bellows 62 is fitted into the bearing holding portion 32 from the radially outer side. Therefore, contamination inside the vehicle body BD and the like can be prevented from entering the bearing 70.

  As illustrated in FIG. 4, the communication device 13 receives a command signal S1 from an external device (not shown) and transmits the command signal S1 to the control device 12. The control device 12 controls the motor drive device 11 based on the output from the position detection sensor 52 and the command signal S1. A current is supplied to the control device 12 from the external power supply P. The motor drive device 11 supplies a current to the motor main body 20a based on the control signal from the control device 12 and the output from the rotation sensor 20b. The control device 12 transmits the status signal S2 of the motor body 20a to the external device via the communication device 13. The external device adjusts the command signal S1 based on the state signal S2.

  As described above, the output of the motor 20, that is, the rotation of the motor shaft 21, is controlled, and the axial position of the movable member 40 is controlled. As a result, the axial position of the vehicle-side shaft CS1 can be controlled by the axial position of the movable member 40.

  For example, when the vehicle-side shaft is driven by hydraulic pressure, it is necessary to apply the hydraulic pressure even when the axial position of the vehicle-side shaft is held at a predetermined position, resulting in a problem of increased energy consumption. On the other hand, by driving the vehicle side shaft CS1 using the motor 20, it is only necessary to drive the motor 20 only when moving the vehicle side shaft CS1, so that energy consumption can be reduced.

  The present invention is not limited to the above-described embodiment, and other configurations can be employed. In the following description, the same configurations as those described above may be omitted by appropriately attaching the same reference numerals.

  The movable member 40 may be configured as the movable member 140 shown in FIG. As shown in FIG. 5, the vehicle side shaft CS2 does not have the second groove portion CSb unlike the vehicle side shaft CS1.

  The second protrusion 146 is a leaf spring. Therefore, when engaging the 1st protrusion part 145 with 1st groove part CSc, the 2nd protrusion part 146 can be elastically deformed. Thereby, after the 1st protrusion part 145 engages with the 1st groove part CSc, the vehicle side shaft CS2 can be gripped by the first protrusion part 145 and the second protrusion part 146. Therefore, it is easy to suppress the movable member 140 from moving in the axial direction and coming off from the vehicle-side shaft CS2.

  The second projecting portion 146 is a separate member from the operating lever portion main body 42 a and the first projecting portion 145. The 2nd protrusion part 146 has the fixing | fixed part 146a, the holding part 146b, and the inclination part 146c. The fixed portion 146a is plate-shaped extending in the vertical direction. The fixing portion 146a is fixed to the operating lever portion main body 42a by, for example, a screw 147.

  The grip portion 146b is connected to the lower end of the fixed portion 146a. The shape of the grip portion 146b is an arc shape when viewed from the front. The grip portion 146b has a shape along the outer peripheral surface of the vehicle-side shaft CS2. That is, the 2nd protrusion part 146 has a part along the outer peripheral surface of vehicle side shaft CS2. Therefore, the surface on the vehicle side shaft CS2 side (−Y side) of the gripping portion 146b is brought into contact with the outer peripheral surface of the vehicle side shaft CS2, and the vehicle side shaft CS2 is made to be more than It can be gripped stably.

  In a state where the operating lever portion 142 is attached to the vehicle side shaft CS2, the lower end of the grip portion 146b is disposed below the vehicle side shaft CS2. Thereby, it can suppress that vehicle side shaft CS2 falls out to the lower side of the operation lever part 142. FIG.

  The inclined portion 146c is connected to the lower end of the grip portion 146b. The inclination part 146c inclines in the direction away from the 1st protrusion part 145 as it goes below. Therefore, when the operation lever portion 142 is engaged with the vehicle-side shaft CS2 from the upper side, when the vehicle-side shaft CS2 comes into contact with the inclined portion 146c, the force in the direction away from the first projecting portion 145 (+ Y direction) is applied to the inclined portion 146c. Is added. Thereby, as shown by a two-dot chain line in FIG. 5, the second projecting portion 146 is elastically deformed in a direction away from the first projecting portion 145 with the fixing portion 146 a as a fulcrum. And if the operation lever part 142 is inserted in the vehicle side shaft CS2 to a predetermined position, the 2nd protrusion part 146 will return to an original state with a restoring force. Accordingly, the vehicle-side shaft CS2 can be gripped by the first protrusion 145 and the second protrusion 146.

  As described above, the first projecting portion 145 and the second projecting portion are engaged while the first projecting portion 145 is engaged with the first groove portion CSc only by pressing the operating lever portion 142 from above on the vehicle side shaft CS2. 146 can stably grip the vehicle-side shaft CS2. Therefore, the operation lever portion 142 can be easily and stably attached to the vehicle side shaft CS2.

  The cover 60 may not include a bellows. The cover 60 may have a cylindrical shape that does not expand and contract in the axial direction. In this case, the cover 60 may include two cylindrical covers. The two cylindrical covers partially overlap in the radial direction, for example.

  The vehicle-side shaft CS1 may be provided with a hole penetrating the vehicle-side shaft CS1 in the vertical direction instead of the first groove portion CSa and the second groove portion CSb. In this case, the 1st protrusion part 45 and the 2nd protrusion part 46 are each passed through the hole, and are engaged.

  The vehicle side connecting part CS1 is not particularly limited as long as it is a part that can move in the axial direction in the vehicle C. The vehicle side connection part CS1 may not be a shaft. The vehicle-side connecting portion CS1 may be, for example, a rotating arm that rotates and moves in the axial direction as a whole.

  The vehicle side connecting portion (vehicle side shaft) CS1 may be a portion that can move in the vehicle C, and is not particularly limited.

  Each structure of the said embodiment can be suitably combined in the range which does not contradict each other.

  DESCRIPTION OF SYMBOLS 10 ... Electric actuator, 20 ... Motor, 21 ... Motor shaft, 21b ... 1st spiral groove, 30 ... Actuator housing, 40, 140 ... Movable member, 41 ... Main-body part, 41a ... Through-hole, 41b ... 2nd spiral Groove, 42, 142 ... Actuation lever, 43 ... Projection, 44 ... Ball, 45, 145 ... First projection, 46, 146 ... Second projection, 52 ... Position detection sensor, 53 ... Moving unit, 54b ... Movable part, 55 ... spring, 60 ... cover, 61, 62 ... bellows, 70 ... bearing, 80 ... ball screw, CS1, CS2 ... vehicle side shaft (vehicle side connecting part), CSa, CSc ... first groove, CSb ... first 2 grooves, J1 ... central axis

Claims (8)

A motor having a motor shaft extending in a direction parallel to the central axis extending in the axial direction;
A movable member connected to the motor shaft and moving in the axial direction along with the rotation of the motor shaft;
An electric actuator for driving the vehicle side connecting portion movable along the axial direction,
The movable member is
A main body having a through hole through which the motor shaft is passed;
An operating lever portion extending from the main body portion in a direction crossing the axial direction and attached to the vehicle side connecting portion;
Have
The motor shaft is a spiral groove located on the outer peripheral surface of the motor shaft.
Having a spiral groove,
The main body has a second spiral groove that is a spiral groove located on the inner surface of the through hole,
A ball screw is configured by the first spiral groove, the second spiral groove, and a plurality of spherical balls positioned between the first spiral groove and the second spiral groove,
The vehicle side connecting portion is a vehicle side shaft extending in the axial direction,
The vehicle-side shaft is positioned on the outer peripheral surface of the vehicle-side shaft and is perpendicular to the axial direction.
A first groove extending;
The tip of the operating lever part is
A first protrusion that protrudes in a direction perpendicular to the axial direction and is engaged with the first groove;
A second that extends in parallel with the first protrusion and sandwiches the vehicle-side shaft with the first protrusion.
A protrusion,
Have
The second protrusion is an electric actuator that is an urging member. The vehicle-side shaft has a second groove portion that is located on the outer peripheral surface of the vehicle-side shaft and extends in a direction orthogonal to the axial direction,
The second groove portion is located on the opposite side to the first groove portion with the vehicle side shaft interposed therebetween.
The electric actuator according to claim 1 , wherein the second protrusion is engaged with the second groove. The second projecting portion has a portion along the outer peripheral surface of the vehicle-side shaft, the electric actuator according to claim 1 or 2.   A motor having a motor shaft extending in a direction parallel to the central axis extending in the axial direction;
  It is connected to the motor shaft and moves in the axial direction as the motor shaft rotates.
A movable member;
  An electric actuator that drives a vehicle-side connecting portion that moves along the axial direction.
,
  The movable member is
  A main body having a through hole through which the motor shaft is passed;
  An operation that extends from the main body portion in a direction intersecting the axial direction and is attached to the vehicle-side connecting portion.
Lever part,
  Have
  The motor shaft is a spiral groove located on the outer peripheral surface of the motor shaft.
Having a spiral groove,
  The main body has a second spiral groove that is a spiral groove located on the inner surface of the through hole,
  The first spiral groove, the second spiral groove, and the first spiral groove and the second spiral groove
A ball screw is constituted by a plurality of spherical balls located between
  A position detection sensor for detecting the position of the movable member in the axial direction;
  A moving unit for moving the position detection sensor in the axial direction;
  With
  The moving unit is
  A movable portion that is movable in the axial direction in contact with an end portion on one axial side of the position detection sensor;
  A spring in contact with the other axial end of the position detection sensor;
  Have
  The spring moves the position detection sensor from the other axial side toward the one axial side.
Energizing electric actuator. The movable member has a convex portion projecting from the main body portion in a direction opposite to the operation lever portion,
At least a part of the convex portion is in the same position as the operating lever portion in the axial direction,
The electric actuator according to claim 4 , wherein the position detection sensor is disposed at a position facing the convex portion and detects a position of the convex portion in the axial direction. An actuator housing that houses the movable member;
A bearing held in the actuator housing and rotatably supporting the motor shaft;
Further comprising
The electric actuator according to any one of claims 1 to 5 , wherein the bearing is disposed on a distal end side of the motor shaft with respect to the movable member in an axial direction. An actuator housing that houses the movable member;
A cover that is housed in the actuator housing and encloses a radially outer side of the motor shaft;
The provided, electric actuator according to any one of claims 1 to 6. The electric actuator according to claim 7 , wherein the cover includes a bellows.

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