JP2013165539A - Electromagnetic actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic actuator which easily secures a mounting space and achieves small power consumption.SOLUTION: An electromagnetic actuator 40 includes: a shaft 50; a first operation lever 51; a second operation lever 54; and an electromagnetic drive part 60. The electromagnetic drive part 60 rotationally drives the shaft 50. The first operation lever 51 and the second operation lever 54 integrally rotate with the shaft 50 and may move between an engagement position where the first operation lever 51 and the second operation lever 54 engage with a slider 12 and a separation position where the first operation lever 51 and the second operation lever 54 are separated from the slider 12. A movable distance of each operation lever is increased by changing a length of each operation lever without changing the electromagnetic drive part 60. Thus, the enlargement of the electromagnetic actuator 40 is inhibited. Further, the electromagnetic drive part 60 may hold the shaft 50 at a non operation position, a first operation position, and a second operation position in a non conductive state. Hence, small power consumption is achieved.

Description

  The present invention relates to an electromagnetic actuator.

  2. Description of the Related Art A linear operation type electromagnetic actuator that moves a movable body in an axial direction by passing a current through a solenoid is known. The linear motion type electromagnetic actuator disclosed in Patent Document 1 is used in a cam lift adjusting device for an internal combustion engine. The electromagnetic actuator has a piston extending radially outward with respect to the camshaft adjusting member as an operation member. The movable body is fixed to the end of the piston. The solenoid is disposed on the side opposite to the piston with respect to the movable body.

US Pat. No. 6,967,550 B2

  In the linear motion type electromagnetic actuator, it is necessary to enlarge the solenoid in order to increase the movable distance of the operation member. Increasing the solenoid increases the size of the electromagnetic actuator. Therefore, it is difficult to secure a mounting space for the electromagnetic actuator.

  In the linear motion type electromagnetic actuator, the operation member, the movable body, and the solenoid are arranged in a direction away from the operation target. Therefore, the linear motion type electromagnetic actuator is provided so as to protrude in a direction away from the operation target. Therefore, it is difficult to secure a mounting space for the electromagnetic actuator.

  Moreover, in general, in order to maintain the position of the movable body moved by energization of the solenoid, it is necessary to continue energizing the solenoid in the electromagnetic actuator. Therefore, there is a problem that a lot of power is consumed.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnetic actuator that can easily secure a mounting space and consumes less power.

  An electromagnetic actuator according to a first aspect of the present invention includes a support member, a shaft, an operation lever, and an electromagnetic drive unit. The shaft is rotatably supported by the support member. The operation lever is formed integrally with the shaft. When the shaft rotates, the operation lever rotates around the rotation axis of the shaft, and is movable to an engagement position where the operation lever is engaged with the operation target and a separation position where the operation lever is separated from the operation target.

  The electromagnetic drive unit can generate a rotational torque acting on the shaft by a magnetic force generated by energization, and can rotate the shaft from the non-operation position to the operation position so that the operation lever moves from the separated position to the engagement position. Moreover, the electromagnetic drive part can hold | maintain a shaft to a non-operation position and an operation position by no electricity supply.

  Therefore, according to the electromagnetic actuator according to the present invention, the movable distance of the operation lever can be increased without changing the electromagnetic drive unit by changing the length of the operation lever. Therefore, a large movable distance can be obtained with a small physique, and the increase in size of the electromagnetic actuator can be suppressed. Therefore, it is easy to secure a mounting space.

  Further, the electromagnetic drive unit can hold the rotational position of the shaft at the operation position even after the energization is stopped after rotating the shaft from the non-operation position to the operation position. That is, the electromagnetic drive unit consumes electric power only when rotating the shaft. Therefore, power consumption is small.

In this specification, “operation” includes not only a case where the operation target is positively moved but also a case where the operation target is guided in a predetermined direction by regulating the movement direction of the operation target.
In this specification, the “movable distance of the operation member” refers to a distance that the operation member moves in a direction approaching and separating from the operation target.

It is a figure which shows the valve system using the electromagnetic actuator by 1st Embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is the figure which looked at the valve system of FIG. 1 in the arrow IV direction. It is a figure which shows the place which the shaft rotated from the non-operation position of FIG. 2 to the 1st operation position. It is a figure which shows the place which the shaft rotated from the non-operation position of FIG. 2 to the 2nd operation position. It is a figure which shows the place which the shaft rotated from the non-operation position of FIG. 1 to the 1st operation position. It is a figure which shows the state which a roller contact | abuts to the cam for high rotation. It is a figure which shows the place which the shaft rotated from the non-operation position of FIG. 8 to the 2nd operation position. It is XX sectional drawing of FIG. 1, Comprising: It is sectional drawing of the electromagnetic drive part of an electromagnetic actuator. It is sectional drawing which shows the place which the shaft rotated from the non-operation position of FIG. 10 to the 1st operation position. It is sectional drawing which shows the place which the shaft rotated from the non-operation position of FIG. 10 to the 2nd operation position. It is sectional drawing of the electromagnetic drive part of the electromagnetic actuator by 2nd Embodiment of this invention. It is sectional drawing which shows the place which the shaft rotated from the non-operation position of FIG. 13 to the 1st operation position. It is sectional drawing which shows the place which the shaft rotated from the non-operation position of FIG. 13 to the 2nd operation position. It is sectional drawing of the electromagnetic drive part of the electromagnetic actuator by 3rd Embodiment of this invention. It is sectional drawing which shows the place which the shaft rotated from the non-operation position of FIG. 16 to the 1st operation position. It is sectional drawing which shows the place which the shaft rotated from the non-operation position of FIG. 16 to the 2nd operation position. It is a figure which shows the electromagnetic actuator by 4th Embodiment of this invention. It is a figure which shows the electromagnetic actuator by 5th Embodiment of this invention. It is a figure which shows the electromagnetic actuator by 6th Embodiment of this invention. It is a figure which shows the electromagnetic actuator by 7th Embodiment of this invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the embodiments, substantially the same components are denoted by the same reference numerals and description thereof is omitted.
(First embodiment)
The electromagnetic actuator according to the first embodiment of the present invention is used in the valve system shown in FIG. The valve system 10 is a system that drives intake valves 8 and 9 of the internal combustion engine. First, the valve system 10 will be described with reference to FIGS.

  The valve system 10 includes a cam shaft 11, a slider 12, low rotation cams 27 and 28, high rotation cams 29 and 30, rollers 31 and 32, swing arms 33 and 34, lash adjusters 35 and 36, and an electromagnetic actuator 40. Prepare. The slider 12 and the electromagnetic actuator 40 constitute a valve lift adjusting device, that is, a cam switching type variable valve mechanism 37.

The camshaft 11 can rotate in conjunction with a crankshaft (not shown).
The slider 12 is fitted to the camshaft 11 so as not to rotate relative to the camshaft 11 and to be relatively movable in the axial direction. In the present embodiment, the slider 12 is splined to the camshaft 11.

  One end 13 of the slider 12 has a first engagement groove 14. The first engagement groove 14 includes a first groove portion 15, a second groove portion 16, and an inclined groove portion 17. The first groove portion 15 extends in the circumferential direction. The second groove portion 16 is separated from the first groove portion 15 toward the low rotation cam 27 in the axial direction, and in the circumferential direction so that at least one end portion does not overlap with one end portion of the first groove portion 15 when viewed in the axial direction. It extends. The inclined groove portion 17 connects one end portion of the first groove portion 15 and one end portion of the second groove portion 16. As shown in FIG. 3, the bottom wall 18 of the second groove portion 16 is formed such that the second groove portion 16 continuously becomes shallower toward the rear in the rotational direction.

  The other end 20 of the slider 12 has a second engagement groove 21. The second engagement groove 21 includes a first groove part 22, a second groove part 23, and an inclined groove part 24. The first groove portion 22 extends in the circumferential direction. The second groove portion 23 is spaced apart from the first groove portion 22 toward the high-rotation cam 30 in the axial direction. When viewed in the axial direction, at least one end portion is circumferentially arranged so as not to overlap one end portion of the first groove portion 22. It extends. The inclined groove portion 24 connects one end portion of the first groove portion 22 and one end portion of the second groove portion 23. Similarly to the bottom wall 18, the bottom wall 25 of the second groove portion 23 is formed such that the second groove portion 23 continuously becomes shallower toward the rear in the rotational direction.

  The low-rotation cams 27 and 28 and the high-rotation cams 29 and 30 are located between the one end portion 13 and the other end portion 20 of the slider 12 and are formed integrally with the slider 12. The low rotation cam 27 is adjacent to one end 13 of the slider 12, and the high rotation cam 29 is adjacent to the low rotation cam 27. The high rotation cam 30 is adjacent to the other end 20 of the slider 12, and the low rotation cam 28 is adjacent to the high rotation cam 30. The cams 29 and 30 for high rotation have a cam lift larger than the cams 27 and 28 for low rotation. Each cam can rotate integrally with the slider 12 and can move in the axial direction integrally with the slider 12.

  The rollers 31 and 32 are interposed between the low-rotation cams 27 and 28 and the high-rotation cams 29 and 30 and the central portions of the swing arms 33 and 34. The rollers 31 and 32 abut against the outer peripheral surfaces of the low-rotation cams 27 and 28 when the slider 12 is positioned on the intake valve 9 side. The rollers 31 and 32 abut against the outer peripheral surfaces of the high-rotation cams 29 and 30 when the slider 12 is positioned on the intake valve 8 side.

  The swing arms 33 and 34 have one end in contact with the lash adjusters 35 and 36 and the other end in contact with the intake valves 8 and 9. The swing arms 33 and 34 can swing so that the other end approaches and separates from the intake valves 8 and 9 with a contact portion with the lash adjusters 35 and 36 as a fulcrum.

  The electromagnetic actuator 40 includes a case 61, a shaft 50, a first operation lever 51, a second operation lever 54, and an electromagnetic drive unit 60. The first operation lever 51 and the second operation lever 54 function as operation members of the electromagnetic actuator 40.

The case 61 is a “support member” described in the claims, and supports the shaft 50 in a rotatable manner.
The shaft 50 is provided in parallel to the camshaft 11 and is rotatably supported by the case 61. The shaft 50 can be rotated from the rotational position shown in FIG. 2 in one direction of rotation as shown in FIG. Further, the shaft 50 is rotatable from the rotational position shown in FIG. 2 to the other in the rotational direction as shown in FIG.

  The first operating lever 51 has a proximal end portion 52 projecting integrally from the one end portion of the camshaft 11 on the intake valve 8 side in the radially outward direction, and is relative to the proximal end portion 52 about the axis of the proximal end portion 52. A rotatable tip 53 is provided. A needle bearing (not shown) is provided between the distal end portion 53 and the proximal end portion 52.

  When the shaft 50 rotates, the first operation lever 51 rotates around the rotation axis of the shaft 50 and engages with the slider 12 as an “operation object” as shown in FIG. As shown in FIG. 4, the slider 12 can be moved to a separated position. The rotation position of the shaft 50 corresponding to the engagement position of the first operation lever 51 is defined as a “first operation position”. Further, the rotation position of the shaft 50 corresponding to the separated position of the first operation lever 51 is defined as a “first non-operation position”.

  The second operating lever 54 protrudes integrally from the other end of the camshaft 11 on the intake valve 9 side in the radially outward direction, and around the axis of the base end 55 with respect to the base end 55. It has the front-end | tip part 56 which can be rotated relatively. A needle bearing (not shown) is provided between the distal end portion 56 and the proximal end portion 55.

When the shaft 50 rotates, the second operation lever 54 rotates around the rotation axis of the shaft 50 and engages with the slider 12 as shown in FIG. 6, and the slider 12 as shown in FIG. It can move to the separation position which is separated from
The first operation lever 51 and the second operation lever 54 are separated from each other in the direction of the rotation axis. Further, the second operation lever 54 is separated from the first operation lever 51 in one of the rotational directions.

  The rotation position of the shaft 50 corresponding to the engagement position of the second operation lever 54 is defined as a “second operation position”. Further, the rotation position of the shaft 50 corresponding to the separated position of the second operation lever 54 is defined as a “second non-operation position”. In the first embodiment, the first non-operation position is the same position as the second non-operation position. The first operation position is located on the opposite side to the second operation position with respect to the first non-operation position in the rotation direction.

  The electromagnetic drive unit 60 generates a rotational torque acting on the shaft 50 by a magnetic force generated by energization, and moves the shaft 50 from the non-operation position to the first operation position so that the first operation lever 51 moves from the separated position to the engagement position. Can be rotated up to.

Further, the electromagnetic drive unit 60 generates a rotational torque acting on the shaft 50 by the magnetic force generated by energization, and moves the shaft 50 from the non-operation position to the second position so that the second operation lever 54 moves from the separation position to the engagement position. It can be rotated to the operating position.
Moreover, the electromagnetic drive part 60 can hold | maintain the shaft 50 to a non-operation position, a 1st operation position, and a 2nd operation position by no electricity supply. The electromagnetic drive unit 60 will be described in detail later.

Next, the operation of the valve system 10 will be described with reference to FIGS. 1 and 7 to 9.
As shown in FIG. 1, when the camshaft 11 rotates when the slider 12 is positioned on the intake valve 9 side, the rotational motion of the low-rotation cams 27 and 28 is transmitted to the swing arms 33 and 34 via the rollers 31 and 32. And converted into a reciprocating linear motion of the intake valves 8 and 9.

  When the electromagnetic drive unit 60 rotates the shaft 50 to the first operation position from the state of FIG. 1, the first operation lever 51 is fitted into the first groove portion 15 of the one end portion 13 of the slider 12 as shown in FIG. 7. When the slider 12 rotates together with the camshaft 11 with the first operation lever 51 fitted in the first groove portion 15, the inner wall 19 of the inclined groove portion 17 of the slider 12 engages with the first operation lever 51, and the rotation of the slider 12. The direction is restricted, and the slider 12 slides toward the intake valve 8 as shown by an arrow A1 in FIG.

  When the slider 12 slides toward the intake valve 8, the first operation lever 51 is fitted into the second groove portion 16 of the slider 12. When the slider 12 rotates together with the camshaft 11 with the first operation lever 51 fitted in the second groove portion 16, the first operation lever 51 is pushed in the rotational direction by the bottom wall 18 of the second groove portion 16. As a result, the shaft 50 is rotated from the first operation position to the first non-operation position shown in FIG.

  As shown in FIG. 8, when the camshaft 11 rotates when the slider 12 is positioned on the intake valve 8 side, the rotational motion of the high-rotation cams 29 and 30 is transmitted to the swing arms 33 and 34 via the rollers 31 and 32. And converted into a reciprocating linear motion of the intake valves 8 and 9. When the rotational motion of the high-rotation cams 29 and 30 is converted into the reciprocating linear motion of the intake valves 8 and 9, the rotational motion of the low-rotation cams 27 and 28 is converted into the reciprocating linear motion of the intake valves 8 and 9. The valve lift becomes larger than the case.

  When the electromagnetic drive unit 60 rotates the shaft 50 to the second operation position from the state of FIG. 8, the second operation lever 54 is fitted into the first groove portion 22 of the other end portion 20 of the slider 12 as shown in FIG. 9. When the slider 12 rotates together with the camshaft 11 with the second operation lever 54 fitted in the first groove portion 22, the inner wall 26 of the inclined groove portion 24 of the slider 12 engages with the second operation lever 54, and the rotation of the slider 12 occurs. The direction is restricted, and the slider 12 slides toward the intake valve 9 as shown by an arrow A2 in FIG.

  When the slider 12 slides toward the intake valve 9, the second operation lever 54 is fitted into the second groove 23 of the slider 12. When the slider 12 rotates together with the camshaft 11 with the second operation lever 54 fitted in the second groove 23, the second operation lever 54 is pushed in the rotation direction against the bottom wall 25 of the second groove 23. As a result, the shaft 50 is rotated from the second operation position to the second non-operation position shown in FIG.

Next, the electromagnetic drive unit 60 of the electromagnetic actuator 40 will be described in detail with reference to FIGS.
The electromagnetic drive unit 60 is accommodated in the case 61. The electromagnetic drive unit 60 includes a first permanent magnet 62, magnetic bodies 63 and 64, first cores 65 and 66, second cores 67 and 68, first coils 69 and 70, and second coils 71 and 72.

The first permanent magnet 62 is fixed to the shaft 50 and rotates integrally with the shaft 50. The magnetic pole at one end 13 of the first permanent magnet 62 is an N pole, and the magnetic pole at the other end 20 is an S pole.
The magnetic body 63 is positioned radially outward with respect to the one end portion 13 of the first permanent magnet 62 when the rotational position of the shaft 50 is the first non-operation position shown in FIG. The magnetic body 63 is fixed to the inner wall of the case 61.

The magnetic body 64 is positioned radially outward with respect to the other end portion 20 of the first permanent magnet 62 when the rotational position of the shaft 50 is the first non-operation position. The magnetic body 64 is fixed to the inner wall of the case 61.
When the rotational position of the shaft 50 is the first non-operation position, the rotational position of the shaft 50 is determined by the force that the one end portion 13 of the first permanent magnet 62 and the magnetic body 63 attract, and the other end of the first permanent magnet 62. The portion 20 and the magnetic body 64 are held at the first non-operation position by the force of attraction.

The first core 65 is positioned radially outward with respect to the one end portion 13 of the first permanent magnet 62 when the rotational position of the shaft 50 is the first operation position shown in FIG. The first core 65 is fixed to the inner wall of the case 61.
The first core 66 is positioned radially outward with respect to the other end 20 of the first permanent magnet 62 when the rotational position of the shaft 50 is the first operation position. The first core 66 is fixed to the inner wall of the case 61.

  When the rotational position of the shaft 50 is the first operation position, the rotational position of the shaft 50 is determined by the force with which the one end portion 13 of the first permanent magnet 62 and the first core 65 are attracted, and the other end of the first permanent magnet 62. The portion 20 and the first core 66 are held at the first operation position by the attractive force.

The second core 67 is positioned radially outward with respect to the one end portion 13 of the first permanent magnet 62 when the rotational position of the shaft 50 is the second operation position shown in FIG. The second core 67 is fixed to the inner wall of the case 61.
The second core 68 is positioned radially outward with respect to the other end 20 of the first permanent magnet 62 when the rotational position of the shaft 50 is the second operating position. The second core 68 is fixed to the inner wall of the case 61.

  When the rotational position of the shaft 50 is the second operation position, the rotational position of the shaft 50 is determined by the force at which the one end portion 13 of the first permanent magnet 62 and the second core 67 are attracted and the other end of the first permanent magnet 62. The portion 20 and the second core 68 are held at the second operation position by the pulling force.

  The first coil 69 is wound around the first core 65. When the first coil 69 is energized in the forward direction as shown in FIG. 11, the inner diameter end portion of the first core 65 is magnetized to the south pole, and when energized in the reverse direction as shown in FIG. The inner end portion of the core 65 is magnetized to the north pole.

  The first coil 70 is wound around the first core 66. When the first coil 70 is energized in the forward direction, the inner diameter end of the first core 66 is magnetized to the N pole, and when energized in the reverse direction, the inner diameter end of the first core 66 is magnetized to the S pole. Let

  The second coil 71 is wound around the second core 67. When the second coil 71 is energized in the forward direction, the radially inner end of the first core 65 is magnetized to the N pole, and when energized in the reverse direction, the radially inner end of the second core 67 is magnetized to the S pole. Let

  The second coil 72 is wound around the second core 68. When the second coil 72 is energized in the forward direction, the radially inner end of the second core 68 is magnetized to the S pole, and when energized in the reverse direction, the radially inner end of the second core 68 is magnetized to the N pole. Let

  The first coils 69 and 70 and the second coils 71 and 72 are formed of the same winding. One end of the winding connects the first core 65 and the power source, and the other end of the winding connects the second core 67 and the power source.

  When the first coil 69 and the second coil are energized in the forward direction when the shaft 50 is located at the first non-operation position, the first rotational driving torque acts on the shaft 50. Further, when the first coil 69 and the second coil are energized in the opposite directions when the shaft 50 is located at the first non-operation position, the second rotational driving torque acts on the shaft 50.

  Further, when the shaft 50 is located at the first non-operation position, the shaft 50 includes an attractive force between the one end portion 13 of the first permanent magnet 62 and the magnetic body 63, and the other end portion 20 of the first permanent magnet 62. A resistance torque due to the attractive force with the magnetic body 64 acts.

  The first coils 69 and 70 and the second coils 71 and 72 are formed so that the first rotation drive coil is larger than the resistance torque and the second rotation drive coil is larger than the resistance torque. Has been.

  As described above, the electromagnetic actuator 40 according to the first embodiment includes the shaft 50, the first operation lever 51, the second operation lever 54, and the electromagnetic drive unit 60. The first operation lever 51 and the second operation lever 54 rotate around the rotation axis when the shaft 50 rotates, and can move to an engagement position where the first operation lever 51 and the second operation lever 54 are engaged with the slider 12 and a separation position which is separated from the slider 12. .

  The electromagnetic drive unit 60 can generate a first rotational drive torque that acts on the shaft 50 by a magnetic force generated by energization, and can rotate the shaft 50 from the non-operation position to the first operation position. Moreover, the electromagnetic drive part 60 can generate the 2nd rotational drive torque which acts on the shaft 50 with the magnetic force which arises by electricity supply, and can rotate the shaft 50 from a non-operation position to a 2nd operation position.

  Therefore, the electromagnetic actuator 40 is a rotary operation type actuator in which the first operation lever 51 and the second operation lever 54 rotate. Therefore, for example, by changing the lengths of the first operation lever 51 and the second operation lever 54, the movable distance of the operation member can be increased without changing the electromagnetic drive unit 60. Therefore, a large movable distance can be obtained with a small physique, and it is easy to secure a mounting space.

  Moreover, in 1st Embodiment, the electromagnetic drive part 60 can hold | maintain the shaft 50 to a non-operation position, a 1st operation position, and a 2nd operation position by no electricity supply. Specifically, when the rotational position of the shaft 50 is the first non-operation position, the rotational position of the shaft 50 is determined by the force that the one end portion 13 of the first permanent magnet 62 and the magnetic body 63 attract, and the first permanent position. The other end 20 of the magnet 62 and the magnetic body 64 are held at the first non-operation position by the force of attraction.

  Further, when the rotational position of the shaft 50 is the first operation position, the rotational position of the shaft 50 is determined by the force with which the one end portion 13 of the first permanent magnet 62 and the first core 65 are attracted, and the first permanent magnet 62. The other end portion 20 and the first core 66 are held at the first operation position by a pulling force.

  Further, when the rotational position of the shaft 50 is the second operation position, the rotational position of the shaft 50 is determined by the force with which the one end portion 13 of the first permanent magnet 62 and the second core 67 are attracted, and the first permanent magnet 62. The other end portion 20 and the second core 68 are held at the second operation position by a pulling force.

  Therefore, the electromagnetic drive unit 60 can maintain the rotational position of the shaft 50 even if the energization is stopped after the shaft 50 is rotated from the first non-operation position to the first operation position or the second operation position. That is, the electromagnetic drive unit 60 consumes electric power only when rotating the shaft 50. Therefore, power consumption is small.

In the first embodiment, two operation members, the first operation lever 51 and the second operation lever 54, are provided. The operation levers are separated from each other in the direction of the rotation axis of the shaft 50.
Accordingly, the operation of moving the slider 12 in one axial direction and the operation of moving the slider 12 in the other axial direction can be performed by one electromagnetic actuator 40. Therefore, the number of actuators can be reduced, and it is easy to secure a mounting space.

In the first embodiment, the first non-operation position is the same position as the second non-operation position. The first operation position is located on the opposite side to the second operation position with respect to the first non-operation position in the rotation direction.
Therefore, the position of the shaft 50 can be easily controlled because the position of the shaft 50 may be controlled at three positions in the rotational direction.

The first coils 69 and 70 and the second coils 71 and 72 are formed of the same winding.
Therefore, electric power can be supplied to the electromagnetic actuator 40 with two electric wires, and power consumption can be reduced.

When the shaft 50 is located in the first non-operation position, the first rotational drive torque that acts on the shaft 50 when the first coils 69 and 70 and the second coils 71 and 72 are energized in the forward direction is the shaft 50 is in the first non-operational position. It is larger than the resistance torque that acts on the shaft 50 due to the attractive force between the first permanent magnet 62 and the magnetic bodies 63 and 64 when located at the operation position.
Therefore, the shaft 50 can be rotated to the first operation position by energizing each coil while allowing the shaft 50 to be held in the first non-operation position without being energized.

When the shaft 50 is positioned at the first non-operation position, the second rotational drive torque that acts on the shaft 50 when the first coils 69 and 70 and the second coils 71 and 72 are energized in the reverse direction is It is larger than the resistance torque that acts on the shaft 50 due to the attractive force between the first permanent magnet 62 and the magnetic bodies 63 and 64 when located at the operation position.
Therefore, the shaft 50 can be rotated to the second operation position by energizing each coil while allowing the shaft 50 to be held in the first non-operation position without being energized.

  In the first embodiment, the first operation lever 51 and the second operation lever 54 have their distal end portions rotated with respect to the proximal end portion. Therefore, wear of the first operation lever 51 and the second operation lever 54 due to the engagement between the first operation lever 51 and the second operation lever 54 and the slider 12 can be suppressed.

(Second Embodiment)
An electromagnetic actuator according to a second embodiment of the present invention will be described with reference to FIGS.
The electromagnetic drive unit 81 of the electromagnetic actuator 80 includes a case 61, third cores 82, 83, 84, urging means 85, second permanent magnets 86, 89, 92, and third coils 95, 96, 97. .

The third cores 82, 83, 84 are provided at equal intervals in the circumferential direction. The third cores 82, 83 and 84 are fixed to the shaft 50 and rotate integrally with the shaft 50.
The biasing means 85 is composed of a torsion spring, and biases the shaft 50 to the first non-operation position shown in FIG. When the rotation position of the shaft 50 is the first non-operation position, the rotation position of the shaft 50 is held at the first non-operation position by the urging force of the urging means 85.

  The second permanent magnet 86 is positioned radially outward with respect to the third core 82 and is fixed to the inner wall of the case 61. One end portion 87 of the rotation direction of the second permanent magnet 86 is positioned radially outward with respect to the third core 82 when the rotation position of the shaft 50 is the first operation position shown in FIG. . The other end 88 of the second permanent magnet 86 is located radially outward with respect to the third core 82 when the rotational position of the shaft 50 is the second operating position shown in FIG.

  The second permanent magnet 89 is positioned radially outward with respect to the third core 83 and is fixed to the inner wall of the case 61. One end 90 in the rotation direction of the second permanent magnet 89 is located radially outward with respect to the third core 83 when the rotation position of the shaft 50 is the first operation position shown in FIG. 14, and the magnetic pole is the S pole. . The other end 91 of the second permanent magnet 89 is positioned radially outward with respect to the third core 83 when the rotational position of the shaft 50 is the second operating position shown in FIG.

  The second permanent magnet 92 is positioned radially outward with respect to the third core 84 and is fixed to the inner wall of the case 61. One end portion 93 in the rotation direction of the second permanent magnet 92 is positioned radially outward with respect to the third core 84 when the rotation position of the shaft 50 is the first operation position shown in FIG. . The other end 94 of the second permanent magnet 92 is located radially outward with respect to the third core 84 when the rotational position of the shaft 50 is the second operating position shown in FIG.

  When the rotational position of the shaft 50 is the first operation position, the rotational position of the shaft 50 is the force that the second permanent magnet 86 and the third core 82 attract, and the force that the second permanent magnet 89 and the third core 83 attract. And the 2nd permanent magnet 92 and the 3rd core 84 hold | maintain in a 1st operation position with the force which attracts | sucks.

  When the rotational position of the shaft 50 is the second operation position, the rotational position of the shaft 50 is the force that the second permanent magnet 86 and the third core 82 attract, and the force that the second permanent magnet 89 and the third core 83 attract. And the 2nd permanent magnet 92 and the 3rd core 84 hold | maintain in a 2nd operation position with the force which attracts | sucks.

  The third coil 95 is wound around the third core 82. As shown in FIG. 14, the third coil 95 magnetizes the radially outer end portion of the third core 82 to the south pole when energized in the forward direction. Further, as shown in FIG. 15, the third coil 95 magnetizes the radially outer end portion of the third core 82 to the N pole when energized in the reverse direction.

  The third coil 96 is wound around the third core 83. As shown in FIG. 14, the third coil 96 magnetizes the radially outer end of the third core 83 to the N pole when energized in the forward direction. Further, as shown in FIG. 15, the third coil 96 magnetizes the radially outer end portion of the third core 83 to the south pole when energized in the reverse direction.

  The third coil 97 is wound around the third core 84. As shown in FIG. 14, the third coil 97 magnetizes the radially outer end portion of the third core 84 to the N pole when energized in the forward direction. Further, as shown in FIG. 15, the third coil 97 magnetizes the radially outer end portion of the third core 84 to the south pole when energized in the reverse direction.

The third coils 95, 96, 97 are composed of the same winding. One end of this winding connects the third coil 96 and the power source, and the other end of the winding connects the third coil 97 and the power source.
When the third coil 95, 96, 97 is energized in the forward direction when the shaft 50 is located at the first non-operation position, the first rotational driving torque acts on the shaft 50.

Further, when the third coil 95, 96, 97 is energized in the reverse direction when the shaft 50 is located at the first non-operation position, the second rotational driving torque acts on the shaft 50.
Further, when the shaft 50 is located at the first non-operation position, a resistance torque due to the urging force of the urging means 85 acts on the shaft 50.

The third coils 95, 96, and 97 are formed so that the first rotational driving torque is greater than the resistance torque and the second rotational driving torque is greater than the resistance torque.
According to the second embodiment, the same effects as those of the first embodiment can be obtained.

(Third embodiment)
An electromagnetic actuator according to a third embodiment of the present invention will be described with reference to FIGS.
The electromagnetic drive unit 101 of the electromagnetic actuator 100 includes a case 61, a fourth core 102, a fifth core 103, a sixth core 104, a third permanent magnet 105, a fourth permanent magnet 106, a fifth permanent magnet 107, and a sixth permanent. A magnet 108, a fourth coil 109, a fifth coil 110, and a sixth coil 111 are provided.

The fourth core 102, the fifth core 103, and the sixth core 104 are spaced apart from each other at equal intervals in the rotational direction, are fixed to the shaft 50, and rotate integrally with the shaft 50.
When the rotational position of the shaft 50 is the first non-operation position shown in FIG. 16, the third permanent magnet 105 is provided in a radially outward direction with respect to the fourth core 102, and the radially inner wall is an N pole. It is fixed to the inner wall of the case 61.

The fourth permanent magnet 106 is provided so as to be positioned radially outward with respect to the fifth core 103 when the rotational position of the shaft 50 is the first non-operating position, and the inner wall of the case 61 has an S pole. It is fixed to.
The fifth permanent magnet 107 is provided in a radially outward direction with respect to the sixth core 104 when the rotational position of the shaft 50 is the first operating position shown in FIG. 61 is fixed to the inner wall.

  The sixth permanent magnet 108 is provided in a radially outward direction with respect to the sixth core 104 when the rotational position of the shaft 50 is the second operation position shown in FIG. 61 is fixed to the inner wall.

  The fourth coil 109 is wound around the fourth core 102. As shown in FIG. 17, the fourth coil 109 magnetizes the radially outer end of the fourth core 102 to the north pole when energized in the forward direction. Further, as shown in FIG. 18, the fourth coil 109 magnetizes the radially outer end of the fourth core 102 to the south pole when energized in the reverse direction.

  The fifth coil 110 is wound around the fifth core 103. As shown in FIG. 17, the fifth coil 110 magnetizes the radially outer end portion of the fifth core 103 to the N pole when energized in the forward direction. Further, as shown in FIG. 18, the fifth coil 110 magnetizes the radially outer end portion of the fifth core 103 to the south pole when energized in the reverse direction.

  The sixth coil 111 is wound around the sixth core 104. As shown in FIG. 17, the sixth coil 111 magnetizes the radially outer end portion of the sixth core 104 to the south pole when energized in the forward direction. Further, when the sixth coil 111 is energized in the reverse direction as shown in FIG. 18, the outer end portion of the sixth core 104 is magnetized to the N pole.

The fourth coil 109, the fifth coil 110, and the sixth coil 111 are composed of the same winding. One end of the winding connects the fifth coil 110 and the power source, and the other end of the winding connects the fourth coil 109 and the power source.
When the fourth coil 109, the fifth coil 110, and the sixth coil 111 are energized in the forward direction when the shaft 50 is located at the first non-operation position, the first rotational drive torque acts on the shaft 50.

Further, when the fourth coil 109, the fifth coil 110, and the sixth coil 111 are energized in the reverse direction when the shaft 50 is located at the first non-operation position, the second rotational drive torque acts on the shaft 50.
When the shaft 50 is positioned at the first non-operation position, the shaft 50 is caused by the attractive force between the third permanent magnet 105 and the fourth core 102 and the attractive force between the fourth permanent magnet 106 and the fifth core 103. Resistive torque acts.

The fourth coil 109, the fifth coil 110, and the sixth coil 111 are configured such that the first rotational driving torque is greater than the resistance torque and the second rotational driving torque is greater than the resistance torque. Is formed.
According to 3rd Embodiment, there can exist an effect similar to 1st Embodiment.

(Fourth embodiment)
An electromagnetic actuator according to a fourth embodiment of the present invention will be described with reference to FIG.
The electromagnetic actuator 120 includes a transmission 121. The transmission 121 changes the output of the electromagnetic drive unit 60 and transmits it to the shaft 50.

  According to the fourth embodiment, the corresponding range of the rotational speed and torque of the shaft 50 can be expanded. Moreover, the shaft 50 and the electromagnetic drive part 60 can be arrange | positioned in parallel mutually, and the freedom degree of component layout can be raised.

(Fifth embodiment)
An electromagnetic actuator according to a fifth embodiment of the present invention will be described with reference to FIG.
The electromagnetic actuator 130 includes a solenoid 131 capable of three-position control in the axial direction, and a lever 133 that protrudes from the shaft 50 in the radially outward direction and is connected to the movable body 132 of the solenoid 131. The solenoid 131 and the lever 133 constitute an “electromagnetic drive unit” recited in the claims.
According to 5th Embodiment, there can exist an effect similar to 1st Embodiment.

(Sixth embodiment)
An electromagnetic actuator according to a sixth embodiment of the present invention will be described with reference to FIG.
The first operation lever 141 of the electromagnetic actuator 140 has a protrusion 142 that protrudes toward the slider 12 in a direction orthogonal to the extending direction of the first operation lever 141. A bearing 143 is fitted on the protrusion 142. The bearing 143 can be fitted into the first groove 15 of the slider 12 when the shaft 50 rotates to the first operation position.

  The second operating lever 144 has a protrusion 145 that protrudes toward the slider 12 in a direction orthogonal to the extending direction of the second operating lever 144. A bearing 146 is fitted on the protrusion 145. The bearing 146 can be fitted into the second groove 16 of the slider 12 when the shaft 50 rotates to the second operation position.

  According to the sixth embodiment, since the first operation lever 141 and the second operation lever 144 are configured to be fitted to the slider 12 from the side surface, the distance between the shaft 50 and the slider 12 can be reduced. Further, the electromagnetic actuator 140 has a structure in which the reaction force from the slider 12 is received by the case 61 via the bearings 143 and 146, the first operation lever 141 and the second operation lever 144, and the shaft 50. 60 shaft holding force is small. Therefore, the electromagnetic drive unit 60 can be downsized.

(Seventh embodiment)
An electromagnetic actuator according to a seventh embodiment of the present invention will be described with reference to FIG.
The first operation lever 151 and the second operation lever 152 of the electromagnetic actuator 150 are formed by bending plates. The cross-sectional shapes of the first operating lever 151 and the second operating lever 152 are rectangles having long sides in the direction of the rotation axis of the shaft 50.
According to the seventh embodiment, the rigidity of the first operation lever 151 and the second operation lever 152 can be increased.

(Other embodiments)
In another embodiment of the present invention, the electromagnetic actuator may include only one operation lever. The electromagnetic actuator may include three or more operation levers.
In another embodiment of the present invention, the slider of the valve system has a groove portion for moving the slider in one axial direction and a groove portion for moving the slider in the other axial direction in the same engagement groove. May be. The electromagnetic actuator may be configured to operate the engagement groove with a single operation lever.

In another embodiment of the present invention, the operation position of the first operation lever and the operation position of the second operation lever may be different. That is, the first operation position and the second operation position of the shaft may be different.
In another embodiment of the present invention, the angle formed by the first operation lever and the second operation lever may be any number as long as it is greater than 0 degrees.

In another embodiment of the present invention, the rotation angle from the non-operation position of the shaft to the operation position may be any number as long as it is greater than 0 degrees.
In another embodiment of the present invention, the biasing means for biasing the shaft to the non-operation position may be configured other than a torsion spring.

In another embodiment of the present invention, the rotational position of the shaft may be held by the detent torque of the electromagnetic drive unit.
In another embodiment of the present invention, the entire operation lever may be configured to rotate relative to the shaft. In short, it is sufficient that at least the tip end portion of the operation lever is configured to rotate.
In another embodiment of the present invention, a bearing other than the needle bearing may be provided between the proximal end portion and the distal end portion of the operation lever. For example, a ball bearing or a plain bearing may be used.

The electromagnetic actuator of the present invention is not limited to a valve system having a swing arm, but can be applied to other types of valve systems.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.

12 ... Slider (operation target)
40, 80, 100, 120, 130, 140, 150 ... electromagnetic actuator 50 ... shaft 51, 141, 151 ... first operating lever (operating lever)
54, 144, 152... Second operation lever (operation lever)
60, 81, 101 ... Electromagnetic drive unit 61 ... Case (support member)
131 ... Solenoid (electromagnetic drive unit)

Claims (13)

A support member (61);
A shaft (50) rotatably supported by the support member;
An operation lever that is integrally formed with the shaft and rotates around the rotational axis of the shaft when the shaft rotates, and is movable to an engagement position that engages with the operation target and a separation position that is separated from the operation target. (51, 54, 141, 144, 151, 152);
A rotational torque acting on the shaft is generated by a magnetic force generated by energization, and the shaft can be rotated from a non-operation position to an operation position so that the operation lever moves from the separation position to the engagement position. An electromagnetic drive unit (60, 81, 101, 131) capable of holding the shaft at the non-operating position and the operating position without energization;
An electromagnetic actuator (40, 80, 100, 120, 130, 140, 150) comprising: A plurality of the operation levers (51, 54, 141, 144, 151, 152) are formed,
The electromagnetic actuator according to claim 1, wherein the operation levers are separated from each other in the direction of the rotation axis. Of the plurality of operation levers arranged in the direction of the rotation axis, odd-numbered operation levers are defined as first operation levers (51, 141, 151),
Of the plurality of operation levers arranged in the direction of the rotation axis, the even-numbered operation lever is the second operation lever (54, 144, 152),
The rotation position of the shaft corresponding to the engagement position of the first operation lever is a first operation position,
The rotation position of the shaft corresponding to the separation position of the first operation lever is a first non-operation position,
The rotation position of the shaft corresponding to the engagement position of the second operation lever is a second operation position,
When the rotation position of the shaft corresponding to the separation position of the second operation lever is a second non-operation position,
The first non-operation position is the same position as the second non-operation position,
3. The electromagnetic actuator according to claim 2, wherein the first operation position is located on a side opposite to the second operation position with respect to the first non-operation position in a rotation direction. The electromagnetic drive unit (60)
A first permanent magnet (62) that is fixed to the shaft, rotates integrally with the shaft, and is provided so that the outer diameter wall is one of an N pole and an S pole;
A magnetic body (63, 64) positioned radially outward with respect to the first permanent magnet when the rotational position of the shaft is the first non-operation position, and fixed to the support member;
A first core (65, 66) that is positioned radially outward with respect to the first permanent magnet when the rotational position of the shaft is the first operation position, and is fixed to the support member;
A second core (67, 68) that is positioned radially outward with respect to the first permanent magnet when the rotational position of the shaft is the second operation position, and is fixed to the support member;
When wound around the first core and energized in the forward direction, the inner diameter end of the first core is magnetized to the other of the N and S poles, and when energized in the opposite direction, the diameter of the first core A first coil (69, 70) that magnetizes the inner end to one of an N pole and an S pole;
When wound around the second core and energized in the forward direction, the inner diameter end of the second core is magnetized to one of the N and S poles, and when energized in the opposite direction, the diameter of the second core A second coil (71, 72) for magnetizing the inner end to the other of the N pole and the S pole;
The electromagnetic actuator (40) according to claim 3, characterized in that   The electromagnetic actuator according to claim 4, wherein the first coil and the second coil are formed of the same winding. When the shaft is positioned at the first non-operation position, when the first coil and the second coil are energized in the forward direction, the rotational driving torque acting on the shaft is positioned at the first non-operation position. Sometimes larger than the resistance torque acting on the shaft by the attractive force of the first permanent magnet and the magnetic body,
The rotational driving torque that acts on the shaft when the first coil and the second coil are energized in opposite directions when the shaft is located at the first non-operation position is larger than the resistance torque. Item 6. The electromagnetic actuator according to Item 4 or 5. The electromagnetic drive unit (81)
A third core (82, 83, 84) fixed to the shaft and rotating integrally with the shaft;
Urging means (85) for urging the shaft to the first non-operation position;
One end portion (87, 90, 93) which is located radially outward with respect to the third core when the rotational position of the shaft is the first operating position and whose magnetic pole is one of an N pole and an S pole; and When the rotational position of the shaft is the second operation position, the shaft has a second end portion (88, 91, 94) which is located radially outward with respect to the third core and whose magnetic pole is the other of the N and S poles. A second permanent magnet (86, 89, 92) fixed to the support member;
When wound around the third core and energized in the forward direction, the outer end of the third core is magnetized to the other of the N and S poles, and when energized in the opposite direction, the diameter of the third core A third coil (95, 96, 97) for magnetizing the outer end to one of the N and S poles;
The electromagnetic actuator (80) according to claim 3, characterized in that   The electromagnetic actuator according to claim 7, wherein three third cores are provided so as to be separated from each other in the rotation direction.   The electromagnetic actuator according to claim 8, wherein each of the third coils includes the same winding. When the third coil is forwardly energized when the shaft is located at the first non-operation position, the rotational drive torque acting on the shaft is the urging means when the shaft is located at the first non-operation position. Greater than the resistance torque acting on the shaft by the biasing force of
The rotational drive torque that acts on the shaft when the third coil is energized in the reverse direction when the shaft is located at the first non-operation position, wherein the rotational drive torque is greater than the resistance torque. The electromagnetic actuator as described in any one. The electromagnetic drive unit (101)
A fourth core (102), a fifth core (103) and a sixth core (104) fixed to the shaft, rotating integrally with the shaft, and spaced apart from each other in the rotation direction;
When the rotational position of the shaft is the first non-operation position, the shaft is positioned radially outward with respect to the fourth core, and the inner diameter wall is provided as one of the north and south poles, and is fixed to the support member. A third permanent magnet (105) to be
When the rotational position of the shaft is the first non-operation position, the shaft is positioned radially outward with respect to the fifth core, and the inner diameter wall is provided as the other of the N pole and the S pole, and is fixed to the support member. A fourth permanent magnet (106) to be
When the rotational position of the shaft is the first operating position, the shaft is positioned radially outward with respect to the sixth core, the inner diameter wall is provided as one of the N pole and the S pole, and is fixed to the support member. A fifth permanent magnet (107),
When the rotation position of the shaft is the second operation position, the shaft is positioned radially outward with respect to the sixth core, and the inner diameter wall is provided as the other of the N pole and the S pole, and is fixed to the support member. A sixth permanent magnet (108),
When wound around the fourth core and energized in the forward direction, the outer end of the fourth core is magnetized to one of the N and S poles, and when energized in the opposite direction, the diameter of the fourth core A fourth coil (109) for magnetizing the outer end to the other of the N and S poles;
When wound around the fifth core and energized in the forward direction, the outer end of the fifth core is magnetized to one of the N and S poles, and when energized in the opposite direction, the diameter of the fifth core A fifth coil (110) for magnetizing the outer end to the other of the N pole and the S pole;
When wound around the sixth core and energized in the forward direction, the outer end of the sixth core is magnetized to the other of the N and S poles, and when energized in the opposite direction, the diameter of the sixth core A sixth coil (111) for magnetizing the outer end portion to one of an N pole and an S pole;
The electromagnetic actuator (100) according to claim 3, characterized by comprising:   The electromagnetic actuator according to claim 11, wherein the fourth coil, the fifth coil, and the sixth coil are formed of the same winding. When the fourth coil, the fifth coil, and the sixth coil are energized in the forward direction when the shaft is located at the first non-operation position, the rotational driving torque that acts on the shaft is determined by the shaft. Greater than the resistance torque acting on the shaft due to the attractive force between the third permanent magnet and the fourth core and the attractive force between the fourth permanent magnet and the fifth core when located in the operating position;
When the shaft is located at the first non-operation position, if the fourth coil, the fifth coil, and the sixth coil are energized in the reverse direction, the rotational driving torque that acts on the shaft is greater than the resistance torque. The electromagnetic actuator according to claim 11 or 12.

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