JP2010192487A - Electromagnetic solenoid device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic solenoid device for improving magnetic attraction to a plunger and improving holding force at an operation position to the plunger without increasing power consumption or enlarging the whole. <P>SOLUTION: The magnetic flux ϕm of a magnet 10 acts on the plunger 8 in the process of approaching the operation position P2 from an initial position P1 in addition to the magnetic flux ϕc of a coil 5, thereby the magnetic attraction Fm to the plunger 8 is improved. At the operation position P2, by the generation of a main magnetic circuit M2 and a sub magnetic circuit M1, the holding force at the operation position to the plunger is improved. The magnetic flux ϕm of the magnet 10 is used, so that the increase of the power consumption and the enlargement of the whole are not caused. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electromagnetic solenoid device used for driving an electrical component mounted on a vehicle.

  The electromagnetic solenoid device's reciprocating function includes various valve opening and closing mechanisms, shades that control the light distribution of the low and high discharge headlamps, a leveler that adjusts the irradiation direction up and down, an AFS that adjusts the irradiation direction left and right, And a shift lever locking device of a vehicle (AT vehicle) equipped with an automatic transmission.

As an electromagnetic solenoid device incorporated in the shift lever lock device, there is one in which a movable plunger is inserted so as to be reciprocally movable from a through hole portion of a yoke to a hollow portion of a bobbin (for example, refer to Patent Document 1).
When the brake pedal is depressed with the shift lever operated in the P range, the coil is energized, the movable plunger is magnetically attracted to the core stator and moved, the shift lock is released, and the P range is shifted to another travel range. The shift operation is enabled.

In the electromagnetic solenoid device of Patent Document 2, the permanent magnet is attached to the magnet holding portion of the iron core, and when the electromagnetic coil is energized, the output shaft is attracted to the suction portion by the combined magnetic flux of the electromagnetic coil and the permanent magnet. Moved to position.
The combined magnetic flux of the electromagnetic coil and the permanent magnet enhances the magnetic attractive force with respect to the output shaft, which is suitable when the output shaft has a large stroke or when the output shaft is moved with a strong magnetic attractive force. Since the magnetic flux of the permanent magnet is used, the power consumption of the electromagnetic coil is reduced, while the permanent magnet has a simple structure, thereby realizing a structure that does not increase the overall size.

Japanese Patent Laid-Open No. 2004-314661 JP 2005-217172 A

That is, in Patent Document 2, when the magnetic attractive force is strengthened or the moving stroke is set to be large, the disadvantages of Patent Document 1 in which the power consumption increases or the entire size is increased are solved. However, the permanent magnet of Patent Document 2 only needs to be arranged so as to form a magnetic circuit passing through the inside of the solenoid body, and there is no detailed specification of the arrangement.
For this reason, considering the effective arrangement of the permanent magnets, there is still room to improve the magnetic attraction force against the plunger and the holding force at the operating position without increasing power consumption or increasing the overall size. It was.

  The present invention has been made in view of the above circumstances, and its purpose is to improve the magnetic attraction force against the plunger without increasing the power consumption and the overall size, and at the operating position relative to the plunger. An object of the present invention is to provide an excellent electromagnetic solenoid device capable of improving the holding force.

(About claim 1)
In the electromagnetic solenoid device, the yoke is provided with a sleeve made of a magnetic material having a hollow tube portion around which a coil body is wound. The core stator is disposed so as to face the hollow tube portion in the yoke and has a recessed portion. The plunger is provided so as to be capable of reciprocating in the axial direction within the hollow tube portion. The distal end portion of the plunger has a diameter changing portion corresponding to the hollow portion and having a diameter that decreases toward the distal end. The plunger moves from the initial position to the operating position toward the recess by the electromagnetic attractive force acting between the plunger and the core stator as the coil body is energized. A magnet is provided so that the plunger is magnetically attracted by a combined magnetic flux with the coil body in a process in which the plunger is moved from the initial position to the operating position. The magnet is arranged between the initial position and the operating position so as to overlap the diameter change start portion of the diameter change portion in either the hollow tube portion or the core stator.

When energizing the coil body, the magnetic flux of the magnet acts in addition to the magnetic flux of the coil body to the plunger in the process from the initial position to the operating position, so a strong magnetic attraction force is applied, improving the magnetic attraction force against the plunger Can be made.
When the plunger moves to the operating position, the magnet is positioned so as to overlap the diameter change start portion of the diameter change portion of the hollow tube portion and the core stator.
Therefore, the magnetic flux of the magnet changes from the hollow tube portion (core stator) together with the secondary magnetic circuit that flows from the hollow tube portion (core stator) to the diameter change start portion of the diameter changing portion and returns to the hollow tube portion (core stator). A main magnetic circuit is generated that flows to the inner wall portion of the recess portion through the portion and returns to the hollow tube portion (core stator).
By generating the main magnetic circuit and the sub magnetic circuit, the plunger can be held at the operating position with a strong magnetic attractive force, and the holding force at the operating position with respect to the plunger can be improved.
In addition, since the magnetic flux of the magnet is used, the power consumption is not increased, the magnet itself has a simple structure, and the entire size is not increased.
As a result, it is suitable when the magnetic attraction force to the plunger is strengthened or a large movement stroke is set without increasing the power consumption of the electromagnetic solenoid device.

(About claim 2)
The magnet is composed of a plurality of magnet portions arranged in an annular shape so as to surround the plunger.
For this reason, compared with the case where the integrated annular magnet is provided, less magnet material is required, which contributes to weight saving and cost saving.

(Claim 3)
The hollow tube portion is composed of a main body tube portion and a tip tube portion arranged coaxially with each other, and the magnet has an annular shape, and is coaxially formed between the main body tube portion and the tip tube portion by its own magnetic force. It is held fixed.
Since the magnet is held between the main body tube portion and the tip tube portion by magnetic force, the magnet mounting structure is simple and advantageous in terms of cost.

(Example 1) which is a longitudinal cross-sectional view of an electromagnetic solenoid apparatus. (A) is a disassembled perspective view of a main body pipe part, a magnet, and a front-end | tip pipe part, (b) is a perspective view which shows the state which assembled | attached the main body pipe part, the magnet, and the front-end | tip pipe part (Example 1). (A) is a characteristic figure which shows a mode that a magnetic attraction force changes with the position of a magnet, (b)-(d) is a schematic diagram of the principal part which shows the state which changed the attachment position of the magnet (Example 1). . (A) is a perspective view of a magnet composed of two magnet parts (Example 2), (b) is a perspective view of a magnet composed of three magnet parts, (Modification), (c) is four magnets It is a perspective view of the magnet which consists of a part (other modifications). (A) is a disassembled perspective view of a main body pipe part, a magnet, and a front-end | tip pipe part, (b) is a perspective view which shows the state which assembled | attached the main body pipe part, the magnet, and the front-end | tip pipe part (Example 3).

  In the present invention, even when the magnetic attractive force is strengthened or the moving stroke is set to be large, the magnetic attractive force can be improved without increasing the power consumption and the overall size, and the magnetic attractive force. As a result, the holding force at the operating position is improved, which is suitable as an electromagnetic solenoid device for mounting on a vehicle.

  1 to 3 show a first embodiment of the present invention. The electromagnetic solenoid device 1 in FIG. 1 includes an actuator for opening and closing various valves, a shade for controlling the light distribution of the discharge type headlight, a leveler for adjusting the irradiation direction up and down, and adjusting the irradiation direction to the left and right. AFS, and a shift lever locking device for a vehicle (AT vehicle) equipped with an automatic transmission.

The electromagnetic solenoid device 1 in FIG. 1 is configured by providing a sleeve 3 made of a magnetic material in a yoke 2 as a housing. The sleeve 3 includes a flange portion 3 a disposed at the open end 2 a of the yoke 2 and a hollow tube portion 4 extending integrally from the flange portion 3 a to the center portion of the yoke 2, and the hollow tube portion 4 includes a coil body. 5 is wound.
The flange portion 3a of the sleeve 3 is formed integrally with the hollow tube portion 4, but the flange portion 3a and the hollow tube portion 4 may be separate.

  The core stator 6 is provided in a state facing the hollow tube portion 4 in the yoke 2 and has, for example, a recess portion 7 formed so that the depth direction Dp is along the axis. The hollow portion 7 is composed of a small-diameter inner wall portion 7a and a tapered inner wall portion 7c on the front end side, and the tapered inner wall portion 7c gradually increases in diameter from the rear end portion 7b of the small-diameter inner wall portion 7a toward the hollow tube portion 4. It has become.

The plunger 8 is provided so as to be capable of reciprocating in the axial direction within the hollow tube portion 4, and has a diameter changing portion 9 corresponding to the hollow portion 7 at the tip portion and having a diameter that decreases toward the tip. . As the plunger 8 is energized to the coil body 5, the diameter changing portion 9 advances from the initial position P1 into the recessed portion 7 and shifts to the operating position P2 (see FIG. 3C). .
The diameter changing portion 9 includes a tapered tapered end portion 9a and a small diameter portion 9b. The tapered end portion 9a corresponds to the tapered inner wall portion 7c, and the small diameter portion 9b is rearward from the rear end portion of the tapered end portion 9a. It is extended and formed.

The hollow tube portion 4 is composed of a main body tube portion 4a and a tip tube portion 4b that are coaxially arranged. The tip tube portion 4b is coaxial with the rear end opening 7d of the tapered inner wall portion 7c in the core stator 6. It is in contact.
The diameter changing portion 9 is composed of the tapered end portion 9a and the small diameter portion 9b. However, the small diameter portion 9b is omitted, and the tapered end portion 9a is independently formed as a tapered portion connected to a diameter change starting portion 9c described later. You may make it do.

As shown in FIGS. 2 (a) and 2 (b), for example, an annular magnet 10 as a neodymium magnet is fixed and held coaxially by its own magnetic force between the main body tube portion 4a and the tip tube portion 4b. Yes. The magnet 10 may be fixed to the main body tube portion 4a and the tip tube portion 4b with an adhesive (not shown) interposed therebetween.
The inner diameter d1 and the outer diameter d2 of the magnet 10 are set equal to the inner diameter d3 and the outer diameter d4 of the main body tube portion 4a and the tip tube portion 4b, and the magnet 10 is flush with the main body tube portion 4a. I have to.

  The magnet 10 is magnetized in the direction of the thickness t, and is positioned so as to overlap the diameter change start portion 9c of the small diameter portion 9b at the operating position P2, as shown in FIG. The magnetic flux φm of the magnet 10 in the hollow tube portion 4 is set so as to flow in a direction opposite to the magnetic flux φc of the coil body 5 as will be described later. The oblique lines given to the magnet 10 are for easy confirmation of the location, and do not indicate a cross section.

In the above configuration, when the coil body 5 is not energized, the magnetic flux φm of the magnet 10 flows through the magnetic circuit H flowing through the hollow tube portion 4, the flange portion 3a, the yoke 2 and the core stator 6 as shown by a broken line in FIG. Form.
When the coil body 5 is energized, as shown by a solid line in FIG. 1, the magnetic flux φc of the coil body 5 causes the core stator 6, the yoke 2, the flange portion 3a, the hollow tube portion 4, the diameter changing portion 9 of the plunger 8, and the core stator. A magnetic circuit K that flows in the direction opposite to the magnetic flux φm of the magnet 10 is formed toward the recessed portion 7 of 6.
Therefore, the magnetic flux φm of the magnet 10 flowing in the opposite direction through the hollow tube portion 4 is pushed back by the magnetic flux φc of the coil body 5 and flows from the diameter changing portion 9 of the plunger 8 toward the hollow portion 7 of the core stator 6. .

Since the magnetic flux φm of the magnet 10 acts on the plunger 8 in the process from the initial position P1 to the operating position P2 in addition to the magnetic flux φc of the coil body 5, a strong magnetic attraction force is applied to the plunger 8, Magnetic attraction can be improved.
When the plunger 8 is moved to the operating position P <b> 2, the magnet 10 is positioned so as to overlap the diameter change start portion 9 c of the diameter change portion 9 in the hollow tube portion 4.
For this reason, the magnetic flux φm of the magnet 10 flows from the hollow tube portion 4 to the diameter change start portion 9c of the diameter change portion 9 and returns to the hollow tube portion 4, and from the hollow tube portion 4 to the diameter change portion. The main magnetic circuit M2 that flows to the tapered inner wall portion 7c of the hollow portion 7 via the tapered end portion 9a of the hollow portion 9 and returns to the hollow tube portion 4 is generated {see FIG. 3 (c)}.

By generating the main magnetic circuit M2 and the sub magnetic circuit M1, the plunger 8 can be held at the operating position P2 with a strong magnetic attraction force, and the holding force with respect to the plunger 8 can be improved.
In addition, since the magnetic flux φm of the magnet 10 is used, the power consumption is not increased, the magnet 10 itself has a simple structure, and the entire size is not increased.
As a result, this is suitable for increasing the magnetic attraction force or setting a large movement stroke without increasing the power consumption of the electromagnetic solenoid device 1.

Incidentally, Fig.3 (a) shows a mode that the magnetic attraction force Fm of the magnet 10 which acts on the plunger 8 changes with the arrangement | positioning locations of the magnet 10 in the operation position P2.
3A, when the magnet 10 is not provided in the hollow tube portion 4, the gap between the tip end portion 9f of the tapered end portion 9a and the inner bottom portion 7e of the small-diameter inner wall portion 7a. As G increases, the magnetic attractive force Fm gradually decreases.

As shown by the curve R in FIG. 3A, when the set separation dimension J between the tip side 10x of the magnet 10 and the rear end opening 7d of the tapered inner wall 7c is 0.0 mm {see FIG. 3B} As in the case where the magnet 10 is not provided, the magnetic attractive force Fm gradually decreases as the gap G increases.
When the set separation dimension J is set to 3.0 mm as in the present invention indicated by the curve S in FIG. 3A (see FIG. 3C), the magnetic attractive force Fm is about 0.5 mm when the gap G is about 0.5 mm. It becomes a maximum value, and then decreases rapidly as the gap G increases.

As shown by a curve T in FIG. 3A, when the set separation dimension J is 6.0 mm {see FIG. 3D}, the magnetic attractive force Fm increases rapidly when the gap G is approximately 3.5 mm. The maximum value is reached, and then decreases rapidly as the gap G increases.
In this case, when the position of the magnet 10 matches the diameter change start portion 9c of the diameter change portion 9, this means that the magnetic attractive force Fm becomes a maximum value, and the same result as the present invention indicated by the curve S is obtained. Represents that.

  The magnet 10 may be provided in the core stator 6 instead of the hollow tube portion 4. In this case, the tip tube portion 4 b may be integrally formed with the rear end opening 7 d of the core stator 6. . The magnet 10 should just be arrange | positioned so that the plunger 8 may overlap the diameter change start part 9c between the initial position P1 and the action | operation position P2.

FIG. 4A shows Example 2 of the present invention. The difference between the second embodiment and the first embodiment is that the magnet 10 </ b> A is composed of two magnet portions 10 a and 10 b that are intermittently arranged in an annular shape so as to surround the plunger 8. The magnet portions 10a and 10b are arranged in an opposed state in a circular arc shape with circumferential angles θ1 and θ2 smaller than 180 degrees. The circumferential angles θ1 and θ2 may be the same as or different from each other.
In this case, the material of the magnet 10A can be reduced as compared with the case where an integrated annular magnet is provided, which contributes to weight reduction and cost saving.

As shown in FIG. 4 (b), the magnet 10A may be constituted by three magnet portions 10c, 10d, and 10e having circular arcs whose circumferential angles θ3, θ4, and θ5 are smaller than 120 degrees as a modification. Good. The circumferential angles θ3, θ4, and θ5 may be the same as or different from each other.
In addition, as shown in FIG. 4C, the magnet 10A includes four magnet portions 10f, 10g, 10h, which form arcs whose circumferential angles θ6, θ7 θ8, and θ9 are smaller than 90 degrees, as another modification. You may comprise from 10i. The circumferential angles θ6, θ7, θ8, and θ9 may be the same as or different from each other.
The magnet 10A may be configured by intermittently arranging more than four magnet portions in a ring shape.

FIG. 5 shows a third embodiment of the present invention. The difference between the third embodiment and the first embodiment is that the mounting structure of the magnet 10 is changed.
As shown in FIG. 5A, a plurality of female screw holes 20 are formed in the opening front end surface 4 c of the main body tube portion 4 a, and a through hole 21 corresponding to the female screw hole 20 is formed in the opening end surface 10 y of the magnet 10. Is provided. A through hole 22 corresponding to the through hole 21 is also formed in the opening end surface 4d of the distal end tube portion 4b.
As shown in FIG. 5B, the screw 23 is inserted through the through hole 21 of the magnet 10 from the through hole 22 of the tip tube portion 4b and screwed into the female screw hole 20 of the main body tube portion 4a. Thereby, the magnet 10 is clamped between the main body pipe part 4a and the front-end | tip pipe part 4b.

[Modification]
(A) In the first embodiment, the hollow tube portion 4 is constituted by the main body tube portion 4a and the tip tube portion 4b. However, the magnet 10 is coaxial with the opening tip surface of the hollow tube portion 4 by integrating them. You may make it hold fixed to.
(B) Although the neodymium magnet was used as the magnet 10, instead of the neodymium magnet, KS steel, MK steel, alnico magnet, ferrite magnet, samarium cobalt magnet, rubber magnet in which ferrite powder is blended and dispersed using rubber as a binder Or you may use the magnet which combined the magnet and the magnetic body.

  In the present invention, by using the magnetic flux of the magnet, a strong magnetic attractive force is applied to the plunger in the process from the initial position to the operating position when the coil body is energized, thereby improving the magnetic attractive force with respect to the plunger. be able to. In the operating position, the plunger can be held with a strong magnetic attractive force, and the holding force in the operating position with respect to the plunger can be improved. Nevertheless, since the power consumption supplied to the coil body during energization does not increase and does not increase in size, it is suitable as an electromagnetic solenoid device to be mounted on a vehicle. It can be applied to the machine industry.

DESCRIPTION OF SYMBOLS 1 Electromagnetic solenoid device 2 Yoke 2a Open end part 3 Sleeve 3a collar part 4 Hollow pipe part 4a Main body pipe part 4b End pipe part 5 Coil body 6 Core stator 7 Recessed part 8 Plunger 9 Diameter change part 9a Tapered end part 9b Small diameter Part 9c Diameter change start part
10, 10A Magnet 10a-10i Magnet part 10m1-10m4 Magnet side 20 Female screw hole 21, 22 Through hole 23 Screw G Gap P1 Initial position P2 Operation position M1 Sub magnetic circuit M2 Main magnetic circuit Fm Magnetic attractive force

Claims (3)

A yoke in which a sleeve made of a magnetic material having a hollow tube portion around which a coil body is wound;
A core stator provided in a state facing the hollow tube portion in the yoke and having a recess,
A plunger having a diameter changing portion which is provided so as to be capable of reciprocating in the axial direction within the hollow tube portion, corresponds to the hollow portion at the tip portion, and whose diameter dimension decreases toward the tip,
The plunger is adapted to move from the initial position to the operating position toward the recess by an electromagnetic attractive force acting between the plunger and the core stator as the coil body is energized.
Provided in any one of the hollow tube portion and the core stator, and in the process of moving the plunger from the initial position to the operating position, the plunger is magnetically attracted by a combined magnetic flux with the coil body, A magnet is disposed between the initial position and the operating position so as to overlap a diameter change start portion of the diameter change portion in either the hollow tube portion or the core stator. Solenoid device.   The electromagnetic solenoid device according to claim 1, wherein the magnet includes a plurality of magnet portions arranged in an annular shape so as to surround the plunger.   The hollow tube portion is composed of a main body tube portion and a tip tube portion arranged coaxially with each other, and the magnet forms an annular shape between the main body tube portion and the tip tube portion by its own magnetic force. The electromagnetic solenoid device according to claim 1, wherein the electromagnetic solenoid device is fixed and held in a coaxial state.

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