JP2005155710A - Electromagnetic actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily adjust an air gap interval of an electromagnetic actuator at low cost. <P>SOLUTION: This electromagnetic actuator is provided with a core 73 holding an electromagnetic coil 75 and a rotary member 25 forming air gaps 77, 79 between them to operate an intermittent device 13 intermittently by magnetic force of the electromagnetic coil 75 transmitted through a magnetic path. This actuator is provided with an air gap adjusting means 81 for adjusting the air gap 79. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electromagnetic actuator that interrupts an interrupting device (for example, a clutch device).

  Patent Document 1 describes a driving force transmission device 1001 as shown in FIG.

  The driving force transmission device 1001 includes a rotating case 1003, an inner shaft 1005, a main clutch 1007, a ball cam 1009, a pilot clutch 1011 (intermittent device), an armature 1013, an electromagnet 1015, a rotor 1017, and the like.

  The electromagnet 1015 includes an electromagnetic coil 1019 and a core 1021 that holds the electromagnetic coil 1019, and the rotor 1017 is connected to the rotating case 1003 so as to be integrally rotatable, and constitutes a part of the magnetic path of the electromagnet 1015. The core 1021 is supported by the rotor 1017 via a bearing 1023 and forms two air gaps 1025 and 1027 along the magnetic path between the core 1021 and the rotor 1017.

  The driving force transmission device 1001 is arranged by dividing a rear-wheel side propeller shaft that connects a rear wheel and a transfer in a four-wheel drive vehicle. When an electromagnet 1015 is excited, a magnetic flux loop 1029 is formed in a magnetic path to form an armature 1013. Is sucked and the pilot clutch 1011 is engaged. When the pilot clutch 1011 is engaged, the driving force of the engine is applied to the ball cam 1009 and the main clutch 1007 (driving force transmission device 1001) is connected by the generated cam thrust force to transmit the driving force to the rear wheel side. It becomes a driving state.

  When the excitation of the electromagnet 1015 is stopped, the pilot clutch 1011 is released, the cam thrust force of the ball cam 1009 disappears, the main clutch 1007 is released, the connection of the driving force transmission device 1001 is released, the rear wheel side is disconnected, and the vehicle It becomes a two-wheel drive state of front wheel drive.

Further, a ring-shaped magnetic path adjusting member 1031 is screwed to the rotor 1017 by a screw portion 1033 parallel to the axial direction in order to adjust the cross-sectional area of the magnetic path, and the air gap 1025 is a magnetic path adjusting member 1031. And the core 1021 are formed between two surfaces parallel to the axial direction. When the magnetic path adjusting member 1031 is rotated and its axial position is changed, the magnetic path cross-sectional area in the air gap 1025 changes, and the attractive force of the armature 1013 by the electromagnet 1015, the transmission torque of the pilot clutch 1011 and the main clutch 1007 (driving force). The transmission torque by the transmission device 1001) is adjusted.
Japanese Patent Laid-Open No. 10-329562 (FIG. 1)

  However, in the driving force transmission device 1001 of FIG. 10, the air gap 1025 is formed between two surfaces parallel to the axial direction, and the magnetic path adjusting member 1031 is moved in the axial direction on the screw portion 1033 to thereby generate the air gap. Although the magnetic path cross-sectional area at 1025 can be adjusted, the width and interval of the air gap 1025 cannot be easily and precisely adjusted.

  Therefore, the present invention is an electromagnetic actuator that transmits and interrupts magnetic flux of an electromagnetic coil to an interrupting device via a rotating member (rotor) forming a part of a magnetic path, and easily and precisely adjusts an air gap. An object of the present invention is to provide an electromagnetic actuator that can be used.

  The invention of claim 1 includes an electromagnetic coil, a core that holds the electromagnetic coil, and a rotating member that forms an air gap between the core, and is formed by the core, the rotating member, and the air gap. An electromagnetic actuator for intermittently operating the intermittent device by the magnetic force of the electromagnetic coil transmitted through the magnetic path is provided with an air gap adjusting means capable of adjusting the air gap.

  Invention of Claim 2 is the electromagnetic actuator described in Claim 1, Comprising: The said air gap adjustment means is attached to any one member of the said rotation member and the said core, The said member is said with respect to the other member. It is a wedge-shaped cross-section member that forms an air gap, and the air gap is changed and adjusted by adjusting the position of the wedge-shaped cross-section member.

  The invention according to claim 3 is the electromagnetic actuator according to claim 1, wherein the core is supported by the rotating member via a bearing, and the air gap adjusting means is provided on the rotating member. A retaining ring for positioning the core via the core, and by changing the thickness of the retaining ring, the core moves with respect to the rotating member together with the bearing, and the air gap is adjusted. .

  Invention of Claim 4 is the electromagnetic actuator described in Claim 2, Comprising: The said wedge-shaped cross-section member is press-fitted in any one member of the said rotation member and the said core by the inclined surface with respect to an axial direction, The air gap is formed along the axial direction with the other member.

  A fifth aspect of the present invention is the electromagnetic actuator according to the second aspect, wherein the wedge-shaped cross-sectional member is screwed to one of the rotating member and the core by a screw portion along an axial direction. The air gap is formed between an inclined surface with respect to the axial direction and the radial direction formed in the wedge-shaped cross-section member, and a surface parallel to the axial direction formed in the other member. To do.

  A sixth aspect of the present invention is the electromagnetic actuator according to the second aspect, wherein the wedge-shaped cross-sectional member is screwed to one of the rotating member and the core by a screw portion along the axial direction. The air gap is formed in parallel with each other between an inclined surface with respect to the axial direction and the radial direction formed on the wedge-shaped cross-section member and an inclined surface with respect to the axial direction and the radial direction formed on the other member. It is characterized by.

  A seventh aspect of the present invention is the electromagnetic actuator according to the third aspect, wherein the air gap includes a radial surface formed on the core and a radial surface formed on the rotating member. The core and the rotating member are arranged in the axial direction of each other in the air gap portion.

  The invention according to claim 8 is the electromagnetic actuator according to claim 3, wherein the air gap has an inclined surface with respect to an axial direction and a radial direction formed in the core, and an axial direction formed in the rotating member. And the inclined surface with respect to the radial direction are formed in parallel to each other, and in the air gap portion, the core and the rotating member are arranged in the axial direction of each other.

  A ninth aspect of the present invention is the electromagnetic actuator according to the third aspect, wherein the air gap includes an inclined surface with respect to an axial direction and a radial direction formed in the core, and an axial direction formed in the rotating member. And the inclined surface with respect to the radial direction are formed in parallel to each other, and in the air gap portion, the core and the rotating member are arranged in the radial direction of each other, and the rotating member with respect to the core The facing area is wider than the facing area of the core with respect to the rotating member.

  A tenth aspect of the present invention is the electromagnetic actuator according to the third aspect, wherein the air gap includes an inclined surface with respect to an axial direction and a radial direction formed in the core, and an axial direction formed in the rotating member. And the inclined surface with respect to the radial direction are formed in parallel to each other, and in the air gap portion, the core and the rotating member are arranged in the radial direction of each other, and the rotating member with respect to the core The facing area is narrower than the facing area of the core with respect to the rotating member.

  An eleventh aspect of the present invention is the electromagnetic actuator according to the third aspect, wherein the air gap includes an axial surface formed in the core and an axial surface formed in the rotating member. The core and the rotating member are arranged in the radial direction of each other in the air gap portion.

  A twelfth aspect of the present invention is the electromagnetic actuator according to any one of the third and seventh to eleventh aspects, wherein the bearing is disposed between the bearing and the rotating member in the direction of the retaining ring. It is characterized in that a gap filling member that prevents the play of the core and the fluctuation of the air gap by pressing is disposed.

  The electromagnetic actuator according to claim 1 is provided with an air gap adjusting means capable of adjusting the width and cross-sectional area of the air gap to a predetermined value between the core holding the electromagnetic coil and the rotating member. If the air gap is wide and wide, the magnetic flux density decreases as the magnetic resistance increases by air, the armature attracting force by the electromagnet decreases, the transmission torque decreases, and the air gap decreases. If the width and interval are narrowed, the transmission torque increases as the magnetic flux density increases. In addition, since the magnetic resistance of air is relatively large, adjusting the air gap in this way can greatly adjust the clutch engagement, that is, the transmission torque by the attractive force of the electromagnet, and can also be adjusted precisely. You can also.

  The electromagnetic actuator according to claim 2 can obtain the same effect as that of the structure of claim 1.

  Also, by adjusting the position of the wedge-shaped cross-section member, which is an air gap adjusting means, or by using a wedge-shaped cross-section member having a different axial dimension, the air gap interval and cross-sectional area (opposite area of the rotating member and the core) Can be adjusted.

  According to a third aspect of the present invention, the thickness of the retaining ring, which is an air gap adjusting means, is changed (by replacing with a retaining ring having a different thickness) to move the core to adjust the gap and the cross-sectional area of the air gap. Thus, the same effect as that of the structure of claim 1 can be obtained.

  Further, according to this configuration, it is possible to adjust the air gap at an extremely low cost by simply replacing the retaining ring.

  The electromagnetic actuator of claim 4 can obtain the same effect as that of the structure of claim 2.

  In addition, in this configuration in which the wedge-shaped cross-section member is attached by press-fitting, the axial position of the wedge-shaped cross-section member is determined simply by press-fitting, and no special positioning means is required. Can be adjusted.

  Further, if the wedge angle of the wedge-shaped cross-section member is reduced, it is possible to change the axial position by utilizing a slight deflection of the wedge-shaped cross-section member, and this makes it possible to finely adjust the air gap.

  The electromagnetic actuator according to claim 5 can achieve the same effect as that of the structure according to claim 2.

  Further, in this configuration in which the wedge-shaped cross-section member is screwed, it is easy to adjust the position of the wedge-shaped cross-section member precisely or significantly on the screw portion, and thus the air gap is precisely or greatly adjusted. Easy to adjust.

  The electromagnetic actuator according to the sixth aspect can obtain the same effects as those of the fifth aspect.

  Further, the wedge-shaped cross-section member is screwed to the rotating member, for example, by a screw portion parallel to the axial direction, and the air gap is formed between the inclined surfaces with respect to the axial direction and the radial direction provided in the wedge-shaped cross-section member and the rotating member. In this configuration formed in parallel, it is possible to increase the magnetic flux density by adjusting the interval of the air gap as much as possible by adjusting the position of the wedge-shaped cross-section member.

  Further, in this configuration in which the air gap is formed to be inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap is formed in comparison with the configuration in which the air gap is formed at right angles to the magnetic flux direction. The cross-sectional area can be widened, and the magnetic flux density on the magnetic path can be increased.

  The electromagnetic actuator of claim 7 can obtain the same effect as that of the structure of claim 3.

  In addition, when adjusting the air gap by moving the core in the axial direction, the configuration in which the core and the rotating member are arranged in the axial direction in the air gap portion is increased due to the movement of the core in the axial direction. This is advantageous when it is desired to adjust the air gap significantly.

  The electromagnetic actuator according to the eighth aspect can obtain the same effects as those of the third aspect.

  In addition, when adjusting the air gap by moving the core in the axial direction, the configuration in which the core and the rotating member are arranged in the axial direction in the air gap portion is increased due to the movement of the core in the axial direction. This is advantageous when it is desired to adjust the air gap significantly.

  Further, in this configuration in which the air gap is formed to be inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap is formed in comparison with the configuration in which the air gap is formed at right angles to the magnetic flux direction. The cross-sectional area can be widened, and the magnetic flux density on the magnetic path can be increased.

  The electromagnetic actuator according to the ninth aspect can obtain the same effects as those of the third aspect.

  In addition, when adjusting the air gap by moving the core in the axial direction, this configuration in which the core and the rotating member are arranged in the radial direction in the air gap portion, the air gap becomes smaller as the core moves in the axial direction. This is advantageous when the air gap needs to be adjusted precisely.

  Further, in this configuration in which the air gap is formed to be inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap is formed in comparison with the configuration in which the air gap is formed at right angles to the magnetic flux direction. The cross-sectional area can be widened, and the magnetic flux density on the magnetic path can be increased.

  The electromagnetic actuator of the tenth aspect can obtain the same effect as that of the third aspect.

  Further, in this configuration in which the air gap is formed to be inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap is formed in comparison with the configuration in which the air gap is formed at right angles to the magnetic flux direction. The cross-sectional area can be widened, and the magnetic flux density on the magnetic path can be increased.

  The electromagnetic actuator according to the eleventh aspect can achieve the same effects as those of the third aspect.

  The electromagnetic actuator according to the twelfth aspect can obtain the same effects as the third aspect and the seventh to eleventh aspects.

  Further, since the gap between the core and the air gap is prevented by the gap filling member, the magnetic characteristics and the intermittent function of the electromagnetic actuator are stabilized.

  Next, an embodiment of the present invention will be described.

(First embodiment)
An electromagnetic actuator 1 (first embodiment of the present invention) and an electromagnetic coupling 3 configured using the same will be described with reference to FIG. FIG. 1 shows an electromagnetic actuator 1 and an electromagnetic coupling 3, which is used in a power system of a four-wheel drive vehicle. The left and right directions are the left and right directions of the vehicle, and the right side of FIG. 1 corresponds to the front (engine side) of the four-wheel drive vehicle.

[Configuration of electromagnetic actuator 1]
The electromagnetic actuator 1 includes an electromagnetic coil 75, a core 73 that holds the electromagnetic coil 75, and a rotating member (rotor 25) that forms air gaps 77 and 79 between the core 73. An electromagnetic actuator for intermittently operating the intermittent device (pilot clutch 13) by the magnetic force of the electromagnetic coil 75 transmitted through a magnetic path formed by air gaps 77, 79, etc .;
An air gap adjusting means (wedge-shaped cross-sectional member 81) capable of adjusting the air gap 79 is provided.

  Therefore, if the interval and cross-sectional area of the air gap 79 are adjusted by the wedge-shaped cross-section member 81 as described below, the transmission torque of the pilot clutch 13 can be adjusted precisely or greatly, and the air gap 79 In order to adjust the air gap 79, it is not necessary to prepare several types of cores 73 having different dimensions in the air gap 79, and it is not necessary to repeat the temporary assembly and disassembly of the core 73, so that only one type of core 73 is in stock. It is possible to limit the parts, the part management cost, the part management cost, and the transmission torque adjustment work cost can be greatly reduced.

  In addition, since it is not necessary to attach and detach the core 73 many times, damage to the ball bearing 83 for the core 73 and an increase in parts cost due to bearing damage are prevented.

  In addition, in the electromagnetic actuator 1, the interval and the cross-sectional area of the air gap 79 can be adjusted at low cost by attaching the wedge-shaped cross-sectional member 81 by press fitting.

[Configuration of Power System of Four Wheel Drive Vehicle]
The power system of a four-wheel drive vehicle using the electromagnetic coupling 3 includes an engine (prime mover), a transmission, a transfer, a 2-4 switching mechanism provided in the interior of the transfer, a front differential (the driving force of the engine Differential device), front axle, left and right front wheels, front rear propeller shaft, electromagnetic coupling 3, rear rear propeller shaft, rear differential (distribution of engine driving force to left and right rear wheels) Differential device), rear axle, left and right rear wheels, and the like.

  The driving force of the engine is transmitted from the transmission to the front differential, and is distributed from the front differential to the left and right front wheels via the front axle. The driving force of the engine is transmitted from the transfer to the electromagnetic coupling 3 via the front propeller shaft. When the electromagnetic coupling 3 is connected at this time, the driving force is transmitted to the rear differential via the rear propeller shaft. The vehicle is distributed from the rear differential to the left and right rear wheels via the rear axle, and the vehicle enters a four-wheel drive state. In addition, when the coupling of the electromagnetic coupling 3 is released, the rear propeller shaft and the subsequent parts are disconnected, and the vehicle is in a two-wheel drive state. The electromagnetic coupling 3 is interposed between the front and rear propeller shafts arranged in the rear wheel side power transmission system of the four-wheel drive vehicle in this way, and connects and disconnects the rear wheel side. The magnitude of the driving force transmitted to the side is controlled.

  The electromagnetic coupling 3 includes the electromagnetic actuator 1, the rotary case 5, the inner shaft 7, the multi-plate main clutch 9, the ball cam 11, the multi-plate pilot clutch 13 (intermittent device), the armature 15, and the controller of the present invention. It is housed in a protective casing supported on the vehicle body side.

  The rotating case 5 is made of a flange portion 17 and a power transmission shaft 19 that are integrally formed of a shaft steel material, a cylindrical member 21 made of a ferrous alloy strength material, and an aluminum alloy (non-magnetic material). The cylindrical member 23 and the rotor 25 (rotating member) constituting a part of the electromagnetic actuator 1 are welded to each other, and the flange portion 17 and the cylindrical member 21, and the cylindrical member 21 and the cylindrical member 23 are welded to each other. Yes. The rotor 25 is screwed into the rear side opening of the cylindrical member 23 and is fixed by the double nut function of the nut 27.

  The power transmission shaft 19 is supported on the protective casing via a double-side sealed ball bearing 29, and the rotor 25 is supported on the protective casing via a ball bearing. The power transmission shaft 19 is connected to a transfer side (front) propeller shaft via a joint, and the driving force of the engine is transmitted to the power transmission shaft 19 (the rotating case 5) via these power transmission members. Is done.

  The inner shaft 7 penetrates the rotary case 5 from the rear, and a front end portion is supported by the flange portion 17 by a ball bearing 37 and a rear portion side is supported by the rotor 25 by a needle bearing 39. A connecting shaft is spline connected to the inner shaft 7, and this connecting shaft is connected to a propeller shaft on the rear differential side (rear side) via a joint, and the rotation of the inner shaft 7 is performed via these power transmission members. It is transmitted to the rear differential.

  An O-ring 41 is disposed between the cylindrical member 23 of the rotating case 5 and the rotor 25, and the cross section is X-shaped in front of the needle bearing 39 between the rotor 25 and the inner shaft 7. An X ring 43 is disposed, and the electromagnetic coupling 3 (rotating case 5) is hermetically sealed by the O ring 41 and the X ring 43. Oil is injected into the sealed rotating case 5 from an oil hole 45 provided in the flange portion 17. After the oil is injected, the oil hole 45 is sealed by press-fitting a check ball 47.

  The main clutch 9 is disposed between the rotating case 5 (cylindrical member 21) and the inner shaft 7, and an outer plate 49 thereof is connected to a spline portion 51 formed on the inner periphery of the cylindrical member 21, so that the inner plate 53 is connected to a spline portion 55 formed on the outer periphery of the inner shaft 7.

  The ball cam 11 is disposed between the pressure plate 57 and the cam ring 59. An inner periphery of the pressure plate 57 is connected to the spline portion 55 of the inner shaft 7, and a cam ring 59 is supported on the outer periphery of the inner shaft 7 so as to be relatively rotatable. A cam of the ball cam 11 is interposed between the cam ring 59 and the rotor 25. A thrust bearing 61 and a washer 63 for receiving the reaction force are disposed.

  The pilot clutch 13 is disposed between the rotary case 5 (cylindrical member 23) and the cam ring 59, and the outer plate 65 is connected to a spline portion 67 formed on the inner periphery of the cylindrical member 23, and an inner plate 69. Is connected to a spline portion 71 formed on the outer periphery of the cam ring 59.

  The armature 15 is disposed between the pilot clutch 13 and the pressure plate 57, and has an outer periphery coupled to the spline portion 67 of the cylindrical member 23 so as to be axially movable.

  As described above, the electromagnetic actuator 1 includes the rotor 25, the core 73, the electromagnetic coil 75, the air gaps 77 and 79, and the wedge-shaped cross-sectional member 81 (air gap adjusting means) made of a magnetic member. Yes.

  The core 73 is supported by the rotor 25 via a double-side sealed ball bearing 83, snap rings 85 and 87 for positioning the ball bearing 83 to the rotor 25 and the core 73, and an electromagnetic coil 75 to the rotor 25. It is positioned in the axial direction by a snap ring 89.

  The wedge-shaped cross-section member 81 is press-fitted into the rotor 25 with an inclined surface 91 formed between the rotor 25 and the axial direction and the radial direction. The air gap 79 is formed between the wedge-shaped cross-section member 81 and the core 73. It is formed between.

  In addition, the core 73 and the electromagnetic coil 75 are inserted into the concave portion 93 formed in the rotor 25 through the air gaps 77 and 79 in the assembled state as described above, and are connected to the core 73. It is connected to the protective casing side by a pin and is prevented from rotating. Further, the electromagnetic coil 75 is held in a form by a resin mold and is prevented from rotating. The lead wire is drawn out of the protective casing through the grommet, and is connected to the vehicle battery via the controller.

  The core 73, the wedge-shaped cross-sectional member 81, the air gaps 77 and 79, the rotor 25, the pilot clutch 13, and the armature 15 constitute a magnetic path of the electromagnetic coil 75.

  The rotor 25 is divided into an outer side and an inner side in the radial direction by a ring 95 of austenitic stainless steel which is a non-magnetic material, and each plate 65, 69 of the pilot clutch 13 has a circumferential direction corresponding to the ring 95. Notches 97 provided at equal intervals and a bridge portion for connecting these notches 97 are provided, and the ring 95 and the notches 97 reduce the short circuit of the magnetic flux on the magnetic path.

  The controller performs excitation of the electromagnetic coil 75, excitation current control, excitation stop, and the like.

  When the electromagnetic coil 75 is excited, a magnetic flux loop 99 is generated in the magnetic path and the armature 15 is attracted, and the pilot clutch 13 is pressed and fastened to generate pilot torque (transmission torque). When pilot torque is generated, the driving force of the engine is applied from the rotating case 5 to the ball cam 11 through the pilot clutch 13 and the cam ring 59 according to the magnitude of the pilot torque, and the generated cam thrust force is applied to the ball cam 11 via the pressure plate 57. The main clutch 9 is pressed and fastened, and the electromagnetic coupling 3 is connected. Further, as described above, the cylindrical member 23 of the rotating case 5 is made of a non-magnetic aluminum alloy, so that the magnetic flux is prevented from leaking from the magnetic flux loop 99 to the cylindrical member 23 side. Since the pilot clutch 13 is well guided, a predetermined pilot torque can be obtained, and the electromagnetic coupling 3 can obtain a predetermined coupling torque.

  When the electromagnetic coupling 3 is connected, the driving force of the engine is transmitted from the inner shaft 7 to the rear differential via the rear differential side propeller shaft, etc., and is distributed from the rear differential to the left and right rear wheels so that the vehicle is in a four-wheel drive state. As a result, the driving performance on rough roads and the stability of the vehicle body are improved.

  At this time, when the controller adjusts the exciting current of the electromagnetic coil 75 to control the magnetic force, the slip ratio of the pilot clutch 13 changes, the pilot torque changes, the cam thrust force of the ball cam 11 changes, and the coupling force ( The magnitude of the transmission torque sent to the rear wheel side via the electromagnetic coupling 3) can be adjusted. By adjusting the coupling force, the driving force distribution ratio between the front and rear wheels can be arbitrarily controlled. For example, when this control is performed during turning, the controllability and stability of the vehicle are improved.

  When the excitation of the electromagnetic coil 75 is stopped, the pilot clutch 13 is released, the cam thrust force of the ball cam 11 disappears, the main clutch 9 is released, and the coupling of the electromagnetic coupling 3 is released. When the coupling of the electromagnetic coupling 3 is released, the rear wheel is disconnected from the inner shaft 7 through the rear differential side propeller shaft, and the vehicle enters a two-wheel drive state of front wheel drive, and the fuel efficiency of the engine is improved.

  If each of the air gaps 77 and 79 is narrowed, the magnetic flux density increases as the magnetic resistance decreases, and the attractive force to the armature 15 increases and the pilot torque of the pilot clutch 13 increases. Further, if the air gaps 77 and 79 are widened, the magnetic flux density is reduced and the pilot torque is reduced.

  Therefore, in the air gap 79 formed between the inner periphery of the wedge-shaped cross-sectional member 81 and the outer periphery of the core 73, a predetermined interval of the air gap 79 is obtained simply by selecting the wedge-shaped cross-sectional member 81 having a predetermined inner diameter. Further, if the axial dimension of the wedge-shaped cross-sectional member 81 is changed, the area facing the core 73 is changed at the air gap 79, and the magnetic flux density is changed.

  Therefore, only by changing the wedge-shaped cross-section member 81 to one having a different inner diameter, or by simply changing the wedge-shaped cross-section member 81 to one having a different axial dimension, a predetermined air gap can be obtained without changing the rotor 25 and the core 73. 79 and a predetermined transmission torque can be obtained.

  Thus, the pilot torque (transmission torque) of the pilot clutch 13 can be adjusted precisely and easily at a low cost, and a large variation in the transmission torque can be adjusted.

  When the electromagnetic coupling 3 rotates, the oil enclosed in the rotating case 5 and the inner shaft 7 flows back through the centrifugal force and lubricates the bearings 37 and 61, the main clutch 9, the ball cam 11, the pilot clutch 13, and the like. ·Cooling. At this time, the oil is moved by the oil holes 101 provided in each inner plate 53 of the main clutch 9, the oil holes 103 provided in the pressure plate 57, and the radial flow paths 105 provided in a plurality of locations of the inner shaft 7. Promoted and improved lubrication / cooling effect.

[Effect of electromagnetic actuator 1]
Since the electromagnetic actuator 1 is configured as described above, the following effects can be obtained.

  By adjusting the axial position of the wedge-shaped cross-section member 81 or by replacing the wedge-shaped cross-section member 81 with a different axial dimension, the distance between the air gaps 79 and the cross-sectional area (opposite area between the rotor 25 and the core 73) and The transmission torque can be adjusted precisely and greatly, and the transmission torque adjustment function is high.

  In addition, since the air gap 79 is formed between the wedge-shaped cross-sectional member 81 press-fitted into the rotor 25 and the core 73, several types of the core 73 and the rotor 25 having different dimensions at the air gap 79 are used for adjusting the transmission torque. Since there is no need to prepare the core 73 and it is not necessary to repeat the temporary assembly and disassembly of the core 73, it is possible to limit the core 73 to only one type, and to adjust the part cost, the part management cost, and the transmission torque. Work costs can be greatly reduced.

  Further, since it is not necessary to attach and detach the core 73 many times for adjusting the transmission torque, damage to the ball bearing 83 for the core 73 and an increase in parts cost due to bearing damage can be avoided.

  Further, since the wedge-shaped cross-section member 81 is axially positioned only by press-fitting and no special positioning means is required, the interval, cross-sectional area and transmission torque of the air gap 79 can be adjusted at a low cost.

  In addition, if the wedge angle of the wedge-shaped cross-section member 81 is reduced, the wedge-shaped cross-section member 81 can be slightly bent to change the axial position, and thus, the air gap 79 can be finely adjusted. It is.

  In addition, the space | interval of the air gap mentioned above means the permeation | transmission distance of the magnetic force line along the permeation | transmission direction of a magnetic force line. The air gap intervals described in the second and subsequent embodiments have the same meaning.

(Second Embodiment)
The electromagnetic actuator 201 (second embodiment of the present invention) will be described with reference to FIG. The electromagnetic actuator 201 is used in place of the electromagnetic actuator 1 in the electromagnetic coupling 3 described in the first embodiment. Hereinafter, members having the same functions as the electromagnetic actuator 1 are given the same reference numerals and are referred to. However, differences from the electromagnetic actuator 1 will be described.

[Configuration of Electromagnetic Actuator 201]
The electromagnetic actuator 201 includes a rotor 25, a core 73, an electromagnetic coil 75, air gaps 77 and 203, and a wedge-shaped cross-section member 205 (air gap adjusting means) made of a magnetic member.

  The wedge-shaped cross-section member 205 is screwed to the rotor 25 by a screw portion 207 formed between the wedge-shaped cross section 205 and the rotor 25, and the air gap 203 is formed in the axial direction formed in the wedge-shaped cross-section member 205. The inclined surface 209 with respect to the radial direction is formed between the parallel surface 211 in the present embodiment along the axial direction formed in the core 73.

  The core 73, the wedge-shaped cross-section member 205, the air gaps 77 and 203, the rotor 25, the pilot clutch 13 and the armature 15 constitute a magnetic path of the electromagnetic coil 75. When the electromagnetic coil 75 is excited, the electromagnetic coupling 3 is When the coupling is stopped and the excitation is stopped, the coupling of the electromagnetic coupling 3 is released.

  A predetermined air gap 203 can be obtained simply by selecting a wedge-shaped cross-sectional member 205 having a predetermined inner diameter. Further, when the wedge-shaped cross-section member 205 is moved on the screw portion 207, the interval between the air gaps 203 is changed to change the magnetic flux density, and when the axial dimension of the wedge-shaped cross-section member 205 is changed, the air gap 203 portion is opposed to the core 73. The area changes and the magnetic flux density changes.

  By adjusting the air gap 203 with the wedge-shaped cross-section member 205 in this way, a predetermined air gap 203 and a predetermined transmission torque can be obtained without changing the rotor 25 and the core 73, and the pilot clutch 13 can be easily manufactured at low cost. The pilot torque (transmission torque), the coupling force of the main clutch 9 and the transmission torque by the electromagnetic coupling 3 can be precisely adjusted, and a large variation in the transmission torque can be adjusted.

[Effect of electromagnetic actuator 201]
The electromagnetic actuator 201 configured as described above can obtain the same effect as the electromagnetic actuator 1 of the first embodiment.

  In addition, the electromagnetic actuator 201 can easily adjust the position of the wedge-shaped cross-section member 205 on the screw portion 207 precisely or greatly by screwing the wedge-shaped cross-section member 205. It is easy to adjust the transmission torque precisely or greatly.

(Third embodiment)
An electromagnetic actuator 301 (a third embodiment of the present invention) will be described with reference to FIG. The electromagnetic actuator 301 is used in place of the electromagnetic actuator 1 in the electromagnetic coupling 3 described in the first embodiment. Hereinafter, members having the same functions as the electromagnetic actuator 1 are given the same reference numerals and are referred to. However, differences from the electromagnetic actuator 1 will be described.

[Configuration of Electromagnetic Actuator 301]
The electromagnetic actuator 301 includes a rotor 25, a core 73, an electromagnetic coil 75, air gaps 77 and 303, and a wedge-shaped cross-section member 305 (air gap adjusting means) made of a magnetic member.

  The wedge-shaped cross-section member 305 is screwed to the rotor 25 along the axial direction by parallel thread portions 307 in the present embodiment, and the air gap 303 is formed with respect to the axial direction and the radial direction formed in the wedge-shaped cross-section member 305. The inclined surface 309 and the inclined surface 311 with respect to the axial direction and the radial direction formed on the core 73 are formed in parallel to each other.

  The core 73, the wedge-shaped cross-section member 305, the air gaps 77 and 303, the rotor 25, the pilot clutch 13 and the armature 15 constitute a magnetic path of the electromagnetic coil 75. When the electromagnetic coil 75 is excited, the electromagnetic coupling 3 is When the coupling is stopped and the excitation is stopped, the coupling of the electromagnetic coupling 3 is released.

  A predetermined air gap 303 can be obtained simply by selecting a wedge-shaped cross-sectional member 305 having a predetermined inner diameter, and when the wedge-shaped cross-sectional member 305 is moved on the screw portion 307, the interval of the air gap 303 changes to change the magnetic flux density. When the axial dimension of the wedge-shaped cross-section member 305 is changed, the area facing the core 73 is changed at the air gap 303 and the magnetic flux density is changed.

  By adjusting the air gap 303 with the wedge-shaped cross-section member 305 in this way, a predetermined air gap 303 and a predetermined transmission torque can be obtained without changing the rotor 25 and the core 73, and the pilot clutch 13 can be easily manufactured at low cost. The pilot torque (transmission torque), the coupling force of the main clutch 9 and the transmission torque by the electromagnetic coupling 3 can be precisely adjusted, and a large variation in the transmission torque can be adjusted.

[Effect of electromagnetic actuator 301]
The electromagnetic actuator 301 configured as described above can obtain the same effects as the electromagnetic actuators 1 and 201 of the first and second embodiments.

  Further, in the electromagnetic actuator 301 in which the air gap 303 (the inclined surfaces 309 and 311) is formed to be inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap 303 is formed at a right angle to the magnetic flux direction. Compared to the configuration, the cross-sectional area of the air gap 303 can be increased, and the magnetic flux density on the magnetic path can be increased.

(Fourth embodiment)
The electromagnetic actuator 401 (fourth embodiment of the present invention) will be described with reference to FIGS. The electromagnetic actuator 401 is used in place of the electromagnetic actuator 1 in the electromagnetic coupling 3 described in the first embodiment. Hereinafter, members having the same functions as the electromagnetic actuator 1 are given the same reference numerals and are referred to. However, differences from the electromagnetic actuator 1 will be described.

[Configuration of Electromagnetic Actuator 401]
The electromagnetic actuator 401 includes a rotor 25, a core 73, an electromagnetic coil 75, air gaps 77 and 403, snap rings 85 and 405 (retaining ring: air gap adjusting means), and a disc spring 407 (gap filling member). It is configured.

  The air gap 403 is formed in parallel between a radial surface 409 formed on the core 73 and a radial surface 411 formed on the rotor 25. Further, in the air gap 403 portion, the core 73 and the rotor 25 are arranged in the axial direction of each other.

  The snap ring 85 and the snap ring 405 are respectively attached to the rotor 25, and the interval W of the air gap 403 is determined by positioning the coil 73 in the axial direction via the ball bearing 83. As described above, if the air gap 403 is widened, the magnetic flux density is reduced and the pilot torque (transmission torque) of the pilot clutch 13 is reduced. If the air gap 403 is narrowed, the magnetic flux density is increased and the pilot torque is increased. .

  The snap ring 405 is thicker than the snap ring 85, and if the thin snap ring 85 is used as shown in FIG. The interval W2 becomes narrower.

  Thus, by changing the thickness of the snap ring (85, 405) as the air gap adjusting means, the interval W of the air gap 403 can be freely adjusted, and the transmission torque can be adjusted.

  The disc spring 407 is disposed between the ball bearing 83 and the rotor 25 and absorbs the axial play of the core 73 by pressing the core 73 toward the snap rings 85 and 405 via the ball bearing 83. The fluctuation of the air gap 403 is prevented, and the magnetic characteristics, the speed cut function, and the transmission torque adjustment function of the electromagnetic actuator 401 are stabilized.

[Effect of electromagnetic actuator 401]
Since the electromagnetic actuator 401 is configured as described above, the following effects can be obtained.

  Further, the interval W of the air gap 403 can be adjusted by changing the thickness of the snap ring (85, 405), which is an air gap adjusting means, and the transmission torque can be precisely or greatly adjusted. , Transmission torque adjustment function is high.

  Further, the air gap 403 and the transmission torque can be adjusted at an extremely low cost by simply replacing the snap ring (85, 405).

  Further, it is not necessary to prepare several types of cores 73 and rotors 25 having different dimensions in the air gap portion for adjusting the transmission torque, and it is not necessary to repeat temporary assembly and disassembly of the core 73, so that one type of core 73 is used. Therefore, it is possible to significantly reduce the parts cost, the part management cost, and the transmission torque adjustment work cost.

  Further, since it is not necessary to attach and detach the core 73 many times for adjusting the transmission torque, damage to the ball bearing 83 for the core 73 and an increase in parts cost due to bearing damage can be avoided.

  In the air gap 403, the core 73 and the rotor 25 are arranged in the axial direction of each other, and the electromagnetic actuator 401 that adjusts the air gap by moving the core 73 in the axial direction has the air gap as the core 73 moves in the axial direction. Since 403 changes greatly, it is advantageous when it is desired to significantly adjust the air gap 403 and the transmission torque.

(Fifth embodiment)
The electromagnetic actuator 501 (fifth embodiment of the present invention) will be described with reference to FIG. The electromagnetic actuator 501 is used in place of the electromagnetic actuator 1 in the electromagnetic coupling 3 described in the first embodiment. Hereinafter, members having the same functions as those of the electromagnetic actuators 1 and 401 are given the same reference numerals. Differences from the electromagnetic actuator 401 will be described while quoting.

[Configuration of Electromagnetic Actuator 501]
The electromagnetic actuator 501 includes a rotor 25, a core 73, an electromagnetic coil 75, air gaps 77 and 503, a snap ring 85 (retaining ring: air gap adjusting means), and a disc spring 407.

  The air gap 503 is formed in parallel between the inclined surface 505 with respect to the axial direction and the radial direction formed in the core 73 and the inclined surface 507 with respect to the axial direction and the radial direction formed in the rotor 25. Further, the core 73 and the rotor 25 are arranged in the axial direction in the air gap 503.

  Similarly to the fourth embodiment, by changing the thickness of the snap ring 85 (snap ring which is an air gap adjusting means), the interval W of the air gap 503 can be freely adjusted and the transmission torque can be adjusted.

[Effect of electromagnetic actuator 501]
The electromagnetic actuator 501 configured as described above can obtain the same effect as the electromagnetic actuator 401 of the fourth embodiment.

  Further, in the air gap 503, the core 73 and the rotor 25 are arranged in the axial direction of each other, and the electromagnetic actuator 501 that adjusts the air gap by moving the core 73 in the axial direction has the air gap as the core 73 moves in the axial direction. Since 503 changes greatly, it is advantageous when it is desired to adjust the air gap 503 and the transmission torque significantly.

  Further, in the electromagnetic actuator 501 in which the air gap 503 (the inclined surfaces 505 and 507) is formed to be inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap 503 is formed at right angles to the magnetic flux direction. Compared to the configuration, the cross-sectional area of the air gap 503 can be increased, and the magnetic flux density on the magnetic path can be increased.

(Sixth embodiment)
The electromagnetic actuator 601 (sixth embodiment of the present invention) will be described with reference to FIG. The electromagnetic actuator 601 is used in place of the electromagnetic actuator 1 in the electromagnetic coupling 3 described in the first embodiment. Hereinafter, members having the same functions as those of the electromagnetic actuators 1 and 401 are given the same reference numerals. Differences from the electromagnetic actuator 401 will be described while quoting.

[Configuration of Electromagnetic Actuator 601]
The electromagnetic actuator 601 includes a rotor 25, a core 73, an electromagnetic coil 75, air gaps 77 and 603, a snap ring 85 (retaining ring: air gap adjusting means), and a disc spring 407.

  The air gap 603 is formed in parallel between the inclined surface 605 formed in the core 73 with respect to the axial direction and the radial direction and the inclined surface 607 formed in the rotor 25 with respect to the axial direction and the radial direction. Further, the core 73 and the rotor 25 are arranged in the radial direction in the air gap 603 portion.

  Similarly to the fourth embodiment, by changing the thickness of the snap ring 85 (snap ring which is an air gap adjusting means), the interval W of the air gap 603 can be freely adjusted and the transmission torque can be adjusted.

[Effect of electromagnetic actuator 601]
The electromagnetic actuator 601 configured as described above can obtain the same effects as the electromagnetic actuator 401 of the fourth embodiment.

  The electromagnetic actuator 601 that adjusts the air gap 603 by moving the core 73 in the axial direction by arranging the core 73 and the rotor 25 in the radial direction in the air gap 603 causes the air to move along with the axial movement of the core 73. Since the gap W of the gap 603 changes small, it is advantageous when it is desired to precisely adjust the air gap 603 and the transmission torque.

  Further, in the electromagnetic actuator 601 in which the air gap 603 (the inclined surfaces 605 and 607) is inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap 603 is formed at a right angle to the magnetic flux direction. Compared to the configuration, the cross-sectional area of the air gap 603 can be increased, and the magnetic flux density on the magnetic path can be increased.

(Seventh embodiment)
The electromagnetic actuator 701 (seventh embodiment of the present invention) will be described with reference to FIG. The electromagnetic actuator 701 is used in place of the electromagnetic actuator 1 in the electromagnetic coupling 3 described in the first embodiment. Hereinafter, members having the same functions as those of the electromagnetic actuators 1 and 401 are given the same reference numerals. Differences from the electromagnetic actuator 401 will be described while quoting.

[Configuration of Electromagnetic Actuator 701]
The electromagnetic actuator 701 includes a rotor 25, a core 73, an electromagnetic coil 75, air gaps 77 and 703, a snap ring 85 (retaining ring: air gap adjusting means), and a disc spring 407.

  The air gap 703 is formed in parallel between the inclined surface 705 formed in the core 73 with respect to the axial direction and the radial direction and the inclined surface 707 formed in the rotor 25 with respect to the axial direction and the radial direction. The core 73 and the rotor 25 are arranged in the radial direction in the air gap 703.

  Similar to the fourth embodiment, by changing the thickness of the snap ring 85 (snap ring which is an air gap adjusting means), the interval W of the air gap 703 can be freely adjusted and the transmission torque can be adjusted.

[Effect of electromagnetic actuator 701]
The electromagnetic actuator 701 configured as described above can obtain the same effect as the electromagnetic actuator 401 of the fourth embodiment.

  Further, the core 73 and the rotor 25 are arranged in the radial direction in the air gap 703, and the electromagnetic actuator 701 that adjusts the air gap 703 by moving the core 73 in the axial direction moves the air along the axial movement of the core 73. Since the gap W of the gap 703 changes small, it is advantageous when it is desired to precisely adjust the air gap 703 and the transmission torque.

  Further, in the electromagnetic actuator 701 in which the air gap 703 (inclined surfaces 705 and 707) is formed to be inclined with respect to the axial direction and the radial direction (magnetic flux direction), the air gap 703 is formed at right angles to the magnetic flux direction. Compared to the configuration, the cross-sectional area of the air gap 703 can be increased, and the magnetic flux density on the magnetic path can be increased.

(Eighth embodiment)
The electromagnetic actuator 801 (eighth embodiment of the present invention) will be described with reference to FIG. The electromagnetic actuator 801 is used in place of the electromagnetic actuator 1 in the electromagnetic coupling 3 described in the first embodiment. Hereinafter, members having the same functions as those of the electromagnetic actuators 1 and 401 are given the same reference numerals. Differences from the electromagnetic actuator 401 will be described while quoting.

[Configuration of Electromagnetic Actuator 801]
The electromagnetic actuator 801 includes a rotor 25, a core 73, an electromagnetic coil 75, air gaps 77 and 803, a snap ring 85 (retaining ring: air gap adjusting means), and a disc spring 407.

  The air gap 803 is formed between an axially parallel surface 805 formed on the core 73 and an axially parallel surface 807 formed on the rotor 25. Further, the core 73 and the rotor 25 are arranged in the radial direction in the air gap 803.

  Similar to the fourth embodiment, by changing the thickness of the snap ring 85 (snap ring as an air gap adjusting means), the interval W of the air gap 803 and the axial overlap allowance (area) can be freely adjusted, The transmission torque can be adjusted.

[Effect of electromagnetic actuator 801]
The electromagnetic actuator 801 configured as described above can obtain the same effect as the electromagnetic actuator 401 of the fourth embodiment.

  Further, in the air gap 803, the core 73 and the rotor 25 are arranged in the radial direction, the core 73 is moved in the axial direction to adjust the air gap 803, and the air gap 803 is formed in parallel in the axial direction. The actuator 801 is advantageous when it is desired to precisely adjust the air gap 803 and the transmission torque because the facing area between the core 73 and the rotor 25 changes as the core 73 moves in the axial direction and the magnetic flux density is adjusted to be small. .

[Other Embodiments Included within the Scope of the Present Invention]
Unlike the above embodiment, the wedge-shaped cross-section member that is an air gap adjusting means may be attached to the core 73 that is a stationary member instead of the rotating member (rotor 25).

It is sectional drawing which shows the electromagnetic coupling 3 using the electromagnetic actuator 1 of 1st Embodiment. It is sectional drawing which shows the electromagnetic actuator 201 of 2nd Embodiment. It is sectional drawing which shows the electromagnetic actuator 301 of 3rd Embodiment. It is sectional drawing which shows the state which adjusted the air gap 403 widely in the electromagnetic actuator 401 of 4th Embodiment. It is sectional drawing which shows the state which adjusted the air gap 403 narrowly in the electromagnetic actuator 401 of 4th Embodiment. It is sectional drawing which shows the electromagnetic actuator 501 of 5th Embodiment. It is sectional drawing which shows the electromagnetic actuator 601 of 6th Embodiment. It is sectional drawing which shows the electromagnetic actuator 701 of 7th Embodiment. It is sectional drawing which shows the electromagnetic actuator 801 of 8th Embodiment. It is sectional drawing of a prior art example.

Explanation of symbols

1 Electromagnetic actuator 13 Pilot clutch (intermittent device)
25 Rotor (Rotating member)
73 Core 75 Electromagnetic coil 79 Air gap 81 Wedge-shaped cross-section member (air gap adjusting means)
201 Electromagnetic actuator 203 Air gap 205 Wedge-shaped cross-section member (air gap adjusting means)
207 Screw part 209 parallel to axial direction Inclined surface 211 with respect to axial direction and radial direction Surface 301 parallel to axial direction Electromagnetic actuator 303 Air gap 305 Wedge-shaped cross-section member (air gap adjusting means)
307 Screw portions 309, 311 parallel to the axial direction Inclined surface 401 with respect to the axial direction and the radial direction Electromagnetic actuator 403 Air gap 405, 85 Snap ring (Retaining ring: Air gap adjusting means)
407 Belleville spring (gap filling member)
409, 411 Radial surface 501 Electromagnetic actuator 503 Air gap 505, 507 Inclined surface 601 with respect to axial direction and radial direction Electromagnetic actuator 603 Air gap 605, 607 Inclined surface 701 with respect to axial direction and radial direction Electromagnetic actuator 703 Air gap 705, 707 Inclined surface 801 with respect to axial direction and radial direction Electromagnetic actuator 803 Air gap 805, 807 Surface parallel to axial direction

Claims (12)

An electromagnetic coil;
A core for holding the electromagnetic coil;
A rotating member that forms an air gap with the core,
An electromagnetic actuator that intermittently operates an intermittent device by the magnetic force of the electromagnetic coil transmitted through a magnetic path formed by the core, the rotating member, and the air gap,
An electromagnetic actuator comprising an air gap adjusting means capable of adjusting the air gap. The electromagnetic actuator according to claim 1,
The air gap adjusting means is a wedge-shaped cross-section member attached to one of the rotating member and the core and forming the air gap with respect to the other member;
An electromagnetic actuator, wherein the air gap is changed and adjusted by adjusting the position of the wedge-shaped cross-section member. The electromagnetic actuator according to claim 1,
The core is supported by the rotating member via a bearing;
The air gap adjusting means is a retaining ring for positioning the core via the bearing on the rotating member;
By changing the thickness of the retaining ring, the core moves together with the bearing with respect to the rotating member, and the air gap is adjusted. An electromagnetic actuator according to claim 2, wherein
The wedge-shaped cross-sectional member is press-fitted into one of the rotating member and the core at an inclined surface with respect to the axial direction, and forms the air gap along the axial direction with the other member. An electromagnetic actuator characterized by that. An electromagnetic actuator according to claim 2, wherein
The wedge-shaped cross-sectional member is screwed to one of the rotating member and the core by a screw portion along the axial direction;
The electromagnetic gap, wherein the air gap is formed between an inclined surface with respect to an axial direction and a radial direction formed in the wedge-shaped cross-section member and a surface along the axial direction formed in the other member. . An electromagnetic actuator according to claim 2, wherein
The wedge-shaped cross-section member is screwed to one of the rotating member and the core by a screw portion parallel to the axial direction;
The air gap is formed in parallel between an inclined surface with respect to the axial direction and the radial direction formed on the wedge-shaped cross-section member and an inclined surface with respect to the axial direction and the radial direction formed on the other member. An electromagnetic actuator characterized by that. An electromagnetic actuator according to claim 3, wherein
The air gap is formed in parallel with each other between a radial surface formed on the core and a radial surface formed on the rotating member,
In the air gap part, the core and the rotating member are arranged in the axial direction of each other. An electromagnetic actuator according to claim 3, wherein
The air gap is formed in parallel with each other between an inclined surface with respect to the axial direction and the radial direction formed in the core and an inclined surface with respect to the axial direction and the radial direction formed in the rotating member, and
In the air gap part, the core and the rotating member are arranged in the axial direction of each other. An electromagnetic actuator according to claim 3, wherein
The air gap is formed in parallel with each other between an inclined surface with respect to the axial direction and the radial direction formed in the core and an inclined surface with respect to the axial direction and the radial direction formed in the rotating member,
In the air gap portion, the core and the rotating member are arranged in a radial direction of each other, and an opposing area of the rotating member to the core is larger than an opposing area of the core to the rotating member. Electromagnetic actuator to perform. An electromagnetic actuator according to claim 3, wherein
The air gap is formed in parallel with each other between an inclined surface with respect to the axial direction and the radial direction formed in the core and an inclined surface with respect to the axial direction and the radial direction formed in the rotating member,
In the air gap portion, the core and the rotating member are arranged in a radial direction of each other, and an opposing area of the rotating member with respect to the core is smaller than an opposing area of the core with respect to the rotating member. Electromagnetic actuator to perform. An electromagnetic actuator according to claim 3, wherein
The air gap is formed in parallel with each other between an axial surface formed on the core and an axial surface formed on the rotating member,
In the air gap part, the core and the rotating member are arranged in the radial direction of each other. An electromagnetic actuator according to any one of claims 3 and 7 to 11,
An electromagnetic actuator characterized in that a gap filling member is disposed between the bearing and the rotating member to prevent fluctuations in the play of the core and the air gap by pressing the bearing in the direction of the retaining ring. .

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