JPH09191622A - Actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively use the winding space by easily winding an excitation coil to a magnetic pole of the laminated core in an actuator. SOLUTION: A rotor 4 having a magnet 8 is inserted into a rotating shaft 7, a shaft inserting hole 11 allowing rotatable insertion of rotor 4 is provided in a bobbin body 9, bobbins 10a, 10b for winding an exciting coils 14a, 14b are formed at both sides and magnet inserting holes 16a, 16b for inserting induction magnets 17a, 17b are formed to the bobbin body 9 in both sides of the bobbins 10a, 10b. The magnet 8 and induction magnets 17a, 17b are provided opposed with each other, the inserting pieces 19a, 19b of almost E-shaped laminated cores 18a, 18b are inserted to the bobbins 10a, 10b so that both ends of the almost E-shaped laminated cores 18a, 18b are provided opposed to the induction magnets 17a, 17b inserted into the magnet inserting holes 16a, 16b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator,
More specifically, it relates to a structure for facilitating assembly of the actuator.

[0002]

2. Description of the Related Art FIG. 5 shows the internal structure of a 4-pole stepping motor 31 which constitutes a conventional actuator 30. In general, the laminated core 32 of the stepping motor 31 is formed by stacking a plurality of laminated plates formed by press punching in a flat field shape. And the laminated core 32
The magnetic poles 33a to 33d are formed by winding the exciting coils 34a to 34d around the inner protrusions of the stepping motor 31. However, when winding the exciting coils 34a to 34d of the magnetic poles 33a to 33d, there is a problem that the outer peripheral edges of the exciting coils 34a to 34d and the laminated core 32 which are adjacent to each other are obstructive and difficult to wind. Further, the exciting coil 34a of each magnetic pole 33a to 33d
Since ~ 34d are prevented from interfering with each other, there is a problem that the space inside the laminated core 32 cannot be effectively used.

The actuator 30 is also composed of 4
When the pole stepping motor 31 is used as an oscillating type that repeats reciprocating motion in one step, as shown in FIG. 6, a pair of opposing stators are used as permanent magnets 35a, 35.
can be replaced with b. Therefore, it is possible to form the laminated core 32 by forming the laminated plate in a plane sun-shape.
As a result, the magnetic poles 33b and 33d are connected to the exciting coil 34b,
When winding 34d, adjacent excitation coils 34a, 34
Since c is eliminated, interference can be prevented.

[0004]

However, in this case, when the exciting coils 34b and 34d are wound around the magnetic poles 33b and 33d, the outer peripheral edge of the laminated core 32 is an obstacle and is hard to wind, and the exciting coils 34b and 34d are wound. There is a problem that the winding space cannot be effectively used and the stepping motor 31 cannot be downsized. Further, in this case, there is a problem that the permanent magnets 35a and 35b must always be held in a fixed position.

The present invention has been made to solve the above problems, and an object thereof is to easily wind an exciting coil around a magnetic pole of a core so that a winding space can be effectively used. An object of the present invention is to provide an actuator capable of preventing a decrease in assembly accuracy.

Further, in addition to the above object, another object of the present invention is to achieve downsizing even if an induction magnet is provided,
Another object of the present invention is to provide an actuator capable of holding the induction magnet with a simple structure so as not to fall out.

[0007]

In order to achieve the above object, in the invention according to claim 1, the magnetic force is generated in the magnetic pole of the core by exciting the exciting coil, and the magnet is provided on the rotating shaft of the rotor. In the actuator for controlling the rotation of the rotary shaft by cooperation, a single bobbin main body is provided separately from the core, and the bobbin main body has a shaft insertion hole into which the rotor is rotatably inserted and an outer periphery thereof. A bobbin part around which the exciting coil is wound is integrally formed, and the core can be connected to the bobbin body in a state where the exciting coil is wound around the bobbin part.

Further, in the invention according to claim 2, in the actuator according to claim 1, the core is composed of a plurality of core divided bodies, and each core divided body is individually connected to the bobbin main body. I was made to do it.

Further, in the invention according to claim 3, the actuator according to claim 1 or 2 is provided with an induction magnet that constantly generates an induction magnetic force with respect to the magnet of the rotor, and the bobbin body has the induction magnet. The magnet is inserted from the outside of the bobbin main body to integrally form an accommodating and positioning part that is accommodated and positioned in the bobbin main body.

Further, in the invention according to claim 4, the invention according to claim 3
In the actuator described in (3), by connecting the core to the bobbin body in a state where the induction magnet is housed and positioned in the housing positioning portion, a part of the core is arranged opposite to the rotor side of the induction magnet and the induction magnet is installed. An actuator having a structure for preventing a magnet from falling off from the housing positioning portion.

[0011]

By the above means, in the invention according to claim 1, the bobbin main body and the core are connected with the exciting coil wound around the outer circumference of the bobbin portion of the bobbin main body. Therefore, when the exciting coil is wound, the exciting coil is easily wound around the bobbin without the core getting in the way, and the winding space is effectively used. Further, since the bobbin main body is integrally formed with the shaft insertion hole, it is possible to prevent the axial misalignment of the rotor when the rotor is inserted into the shaft insertion hole. Furthermore, since the bobbin main body has an integral structure including the shaft insertion hole and the bobbin portion,
Since the relative positional relationship between the exciting coil and the rotor is determined only by the bobbin body, the product-to-product error is reduced.

According to the invention of claim 2, in addition to the operation of the invention of claim 1, the core is composed of a plurality of core divided bodies, and each core divided body is individually connected to the bobbin main body. The structure for connecting the core to the bobbin main body is simplified as compared with the case where the core is single.

Further, in the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, an induction magnet is provided in the accommodation positioning portion of the bobbin main body so as to face the magnet of the rotating shaft. Since it is inserted, the shape of the core can be reduced accordingly. Further, since the induction magnet is positioned only by inserting it into the accommodation positioning portion of the bobbin main body, the positioning work of the induction magnet becomes easy.

Further, in the invention according to claim 4, the invention according to claim 3
In addition to the effect of the invention according to (1), by assembling the core to the bobbin main body, the induction magnet is prevented from falling off from the accommodating and positioning portion. Therefore, the induction magnet can be removed only by the assembling work of the core.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is embodied in an actuator for controlling the intake timing of a vehicle engine will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in FIG. 4, the actuator 1 is composed of a main body case 2, a stator 3, a rotor 4, a lid 5 and a valve body 6. The main body case 2 has an open top and is formed into a substantially oval shape in plan view. A stator 3 is arranged inside the body case 2. In addition, the stator 3 has a magnet 8 of a rotating shaft 7 which constitutes a rotor 4.
Is inserted, and the base end of the rotary shaft 7 is rotatably supported by protruding from the opening of the main body case 2 to the outside. The lid 5 is attached and fixed to the opening of the main body case 2 so that foreign matters and the like do not enter the main body case 2. A rotary shaft 7 is inserted through the lid 5, and the tip of the rotary shaft 7 projects outside the main body case 2 and is rotatably supported. Further, the valve body 6 is fixed to the tip of the rotary shaft 7, and is rotated based on the rotation of the rotary shaft 7.

Next, the structure of the stator 3 arranged inside the body case 2 will be described in detail. As shown in FIGS. 1 to 3, the bobbin main body 9 forming the stator 3 is formed in a rectangular parallelepiped shape, and a shaft insertion hole 11 is vertically provided in the central portion of the bobbin main body 9 in the vertical direction. A rotor 4 having a magnet 8 on a rotating shaft 7 is rotatably inserted in the shaft insertion hole 11. Bobbin portions 10a and 10b are formed on both sides (longitudinal direction in FIG. 2) of the bobbin body 9. The bobbin portions 10a and 10b are composed of winding portions 12a and 12b and restriction pieces 13a and 13b that are formed so as to project at the tips thereof.

The winding portion 12 of the bobbin portions 10a and 10b.
Excitation coils 14a and 14b are wound around a and 12b, respectively. The exciting coils 14a and 14b are prevented from coming off by the restricting pieces 13a and 13b of the bobbin portions 10a and 10b. Further, the bobbin portion 10
a and 10b have a vertically long storage hole 15a having a rectangular shape,
15b is provided so as to communicate with the shaft insertion hole 11. That is, the storage holes 15a and 15b are formed in the bobbin portion
It is formed inside the winding parts 12a and 12b in 0a and 10b.

2, oblong magnet insertion holes 16a and 16b, which are rectangular in shape and serve as a housing positioning portion, are formed on both sides of the bobbin main body 9 in the width direction so as to communicate with the shaft insertion hole 11. And this magnet insertion hole 16
Induction magnets 17a and 17b are inserted inside a and 16b so as to face the magnet 8 of the rotor 4. In this embodiment, the facing surface of the induction magnet 17a facing the magnet 8 is the N pole, and the facing surface of the induction magnet 17b facing the magnet 8 is the S pole.

In addition, insertion pieces 19a, 19 of laminated cores 18a, 18b formed in a plane E shape as core divisions in the accommodation holes 15a, 15b of the bobbin portions 10a, 10b.
b are respectively inserted and are arranged to face the magnet 8 of the rotating shaft 7. Both ends of the laminated cores 18a, 18b are in contact with the outer surfaces of the induction magnets 17a, 17b inserted in the magnet insertion holes 16a, 16b, and their end surfaces are in contact with each other. At this time, the magnet 8
And the laminated core 1 by the attraction force of the induction magnets 17a and 17b.
8a and 18b are held and fixed to the bobbin main body 9, and the induction magnets 17a and 17b are prevented from protruding from the magnet insertion holes 16a and 16b by both ends of the laminated cores 18a and 18b.

Further, as shown in FIG. 1, when the exciting coils 14a and 14b are excited, the laminated core 18a is obtained.
The tip end surface of the insertion piece 19a in FIG. 2 has an N pole, and the tip end surface of the insertion piece 19b in the laminated core 18b has an S pole. Therefore, at this time, the south pole of the magnet 8 in the rotor 4 is attracted to the north pole of the induction magnet 17a and the insertion piece 19a, and stops diagonally to the upper left. Further, the north pole of the magnet 8 in the rotor 4 is attracted to the south pole of the induction magnet 17b and the insertion piece 19b, and stops diagonally to the lower right.
At this time, as shown by the chain double-dashed line in FIG. 1, the valve body 6 fixed to the rotary shaft 7 is stopped in a horizontal state. In this state, the intake valve (not shown) is closed.

Next, the operation of the actuator 1 configured as described above will be described. As shown in FIG. 1, when the exciting coils 14a and 14b of the actuator 1 are excited, the tip surfaces of the insertion pieces 19a and 19b of the E-shaped laminated cores 18a and 18b are magnetized to the N pole and the S pole, respectively. Then, the S pole of the magnet 8 in the rotor 4 is attracted to the N pole of the magnet 17a and the N pole of the insertion piece 19a, and the N pole of the magnet 8 in the rotor 4 is magnet 17b.
And the S pole of the insertion piece 19b. Due to these attractive forces, the magnet 8 of the rotor 4 stands still in the state shown in FIG. At this time, the valve body 6 of the rotor 4 is in a horizontal state as shown by the chain double-dashed line in FIG.

Here, in order to rotate the valve body 6, by switching the direction of the current flowing through the exciting coils 14a and 14b, the tip of the insertion piece 19a in the laminated core 18a becomes the S pole, and the insertion in the laminated core 18b is performed. The tip of the piece 19b becomes the N pole. Therefore, the south pole of the magnet 8 is the induction magnet 17
It is located at the lower left corner by being attracted by the N pole of a and the N pole of the insert piece 19b, and the N pole of the magnet 8 is attracted by the S pole of the induction magnet 17b and the S pole of the insert piece 19a and is diagonally right. Located at the top. That is, the magnet 8 is rotated 90 ° counterclockwise from the initial position. As a result, the valve body 6 fixed to the rotary shaft 7 stops in the vertical state as shown by the alternate long and short dash line. Thereby, the valve element 6
Can supply air to the engine side by opening an intake valve (not shown).

If the insertion piece 19a is the N pole and the insertion piece 19b is the S pole, the valve body 6 and the magnet 8 can be returned to their original initial state as shown in FIG. As a result, the intake valve can be closed.

Therefore, in the actuator 1 which causes the valve body 6 to reciprocally rotate, a pair of exciting coils 14a,
14b and a pair of induction magnets 17a and 17b. Further, since the induction magnets 17a and 17b are housed in the magnet insertion holes 16a and 16b of the bobbin main body 9, the laminated cores 18a and 18b can be made smaller by the amount of housing the induction magnets 17a and 17b, and the stator 3 can be made compact. Can be converted. That is, the entire actuator 1 can be made compact.

The induction magnets 17a and 17b are the laminated core 1
Since it is in contact with both ends of 8a and 18b, the magnet insertion hole 1
It can be prevented from jumping out from 6a and 16b, and can always be held in a fixed position.

Further, since the laminated cores 18a and 18b and the bobbin main body 9 are separately formed, when the exciting coils 14a and 14b are wound around the bobbin portions 10a and 10b, the laminated cores 18a and 18b are The exciting coils 14a and 14b can be easily attached to the bobbin portions 10a and 10 without disturbing them.
It can be wound around b. Also, the bobbin portions 10a, 10
The winding space of b can be effectively used.

In this embodiment, the actuator for controlling the intake timing of the automobile engine is embodied.
It can also be applied to other devices.

[0029]

As described in detail above, according to the invention of claim 1, the winding coil can be easily wound around the bobbin without the core interfering with the winding of the winding coil. At the same time, there is an effect that the winding space can be effectively used. Further, since the shaft insertion hole is integrally formed in the bobbin body, there is an effect that the axial center deviation of the rotor can be prevented. Furthermore, since the bobbin main body has an integral structure including the shaft insertion hole and the bobbin portion, the relative positional relationship between the exciting coil and the rotor is determined only by the bobbin main body, which has the effect of reducing the product-to-product error. .

According to the invention of claim 2, in addition to the effect of the invention of claim 1, in addition to the effect of claim 1, in comparison with the case where the core is a single core, There is an effect that the connecting structure of the core can be simplified.

Further, according to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, since the induction magnet is housed in the bobbin main body, the shape of the core should be reduced accordingly. In addition, since the induction magnet is positioned only by inserting it into the bobbin body, there is an effect that the positioning work becomes easy.

Further, according to the invention of claim 4, in addition to the effect of the invention of claim 3, after the core is assembled, the induction magnet is prevented from coming off from the accommodating and positioning portion, so that the core is prevented. There is an effect that the induction magnet can be prevented from coming off only by assembling work.

[Brief description of the drawings]

FIG. 1 is a sectional view of an actuator according to the present invention.

FIG. 2 is an exploded perspective view showing a structure of a stator.

FIG. 3 is a partial perspective view showing an assembled state of the stator.

FIG. 4 is an exploded perspective view of an actuator.

FIG. 5 is a plan view showing a structure of a stator of a conventional actuator.

FIG. 6 is a plan view showing a structure of a stator of a conventional rocking type actuator.

[Explanation of symbols]

7 ... Rotating shaft, 8 ... Magnet, 9 ... Bobbin body, 10a, 10
b ... Bobbin portion, 11 ... Shaft insertion hole, 14a, 14b ... Excitation coil, 15a, 15b ... Storage hole, 16a, 16b ... Magnet insertion hole as storage positioning portion, 17a, 17b ... Induction magnet, 18a, 18b ... Core Laminated core as a split body

Claims (4)

[Claims] 1. An actuator for generating magnetic force in a magnetic pole of a core by exciting the exciting coil and controlling rotation of the rotary shaft in cooperation with a magnet provided on a rotary shaft of a rotor, the actuator being separated from the core. Then, a single bobbin main body is provided, and in the bobbin main body, a shaft insertion hole into which the rotor is rotatably inserted and a bobbin portion around which an exciting coil is wound are integrally formed, and the bobbin portion is provided with the bobbin portion. An actuator having a structure capable of connecting the core to the bobbin body in a state where an exciting coil is wound. 2. The actuator according to claim 1, wherein the core is composed of a plurality of core divided bodies,
An actuator characterized in that each of the core divisions is individually connected to the bobbin body. 3. The actuator according to claim 1 or 2, further comprising an induction magnet that constantly generates an induction magnetic force with respect to the magnet of the rotor, wherein the induction magnet is inserted into the bobbin body from outside the bobbin body. An actuator is characterized in that a housing positioning portion that is housed and positioned in the bobbin body is integrally formed. 4. The anti-rotor according to claim 3, wherein a part of the core is an induction magnet by connecting a core to the bobbin main body in a state where the induction magnet is accommodated and positioned in the accommodation positioning portion. An actuator characterized in that it is arranged so as to face each other and prevents the induction magnet from falling off from the housing positioning portion.