JPH082168B2 - Actuator - Google Patents

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, the present invention relates to an actuator that controls opening / closing of a valve opening / closing device provided in 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 of the magnetic poles 33b and 33d are wound, 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 laminated core so that a winding space can be effectively used. Another object of the present invention is to provide an actuator that can hold a permanent magnet in a fixed position and can be downsized.

[0006]

In order to solve the above-mentioned problems, the present invention inserts a rotor provided with a magnet on a rotary shaft, and provides a bobbin main body with a shaft insertion hole for rotatably inserting the rotor. Bobbin portions around which the exciting coil is wound are formed on both sides of the bobbin body, and magnet insertion holes for inserting induction magnets are formed in the bobbin bodies on both sides of the bobbin portion. Are arranged so as to face each other, and an insertion piece for inserting the substantially E-shaped laminated core is inserted into the bobbin portion to form a storage hole that is arranged so as to face the magnet of the rotating shaft. The gist of the invention is to bring both ends into contact with the induction magnet inserted into the magnet insertion hole.

[0007]

The exciting coil is wound around the bobbin portion of the bobbin body, and the rotor is rotatably inserted in the shaft insertion hole of the bobbin body. An induction magnet is inserted into the magnet insertion hole of the bobbin body so as to be opposed to the magnet of the rotating shaft.
Further, an insertion piece of the laminated core having a substantially E shape is inserted into the accommodation hole of the bobbin portion and is arranged so as to face the magnet of the rotary shaft, and both ends of the substantially E shaped laminated core are inserted into the magnet insertion hole. It abuts the induction magnet to be inserted. Therefore, since the bobbin portion and the laminated core are separately configured, when the exciting coil is wound around the bobbin portion of the bobbin body, the exciting coil can be easily wound around the bobbin portion without disturbing the laminated core. In addition, the winding space can be effectively used. Moreover, since the magnet insertion hole is formed in the bobbin body to accommodate the induction magnet, the shape of the laminated core can be reduced accordingly. Further, the induction magnet inserted in the magnet insertion hole can be always held in a fixed position by both ends of the E-shaped laminated core.

[0008]

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.
It 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 body 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. Further, a magnet 8 of a rotary shaft 7 that constitutes a rotor 4 is inserted into the stator 3, and a base end of the rotary shaft 7 is rotatably supported by protruding from an 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.

On both sides (width direction in FIG. 2) of the bobbin main body 9, a vertically elongated magnet insertion hole 16a,
16 b is formed so as to communicate with the shaft insertion hole 11. Induction magnets 17a and 17b are inserted into the magnet insertion holes 16a 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.

The accommodating holes 15a and 15b of the bobbin portions 10a and 10b have a laminated core 1 formed in a plane E shape.
Inserting pieces 19a and 19b of 8a and 18b are respectively inserted and arranged so as to face the magnet 8 of the rotating shaft 7. Both ends of the laminated cores 18a, 18b are induction magnets 17a, 17b inserted in the magnet insertion holes 16a, 16b.
Are abutted on the outer side surface of each other, and their end faces are abutted on each other. At this time, the magnet 8 and the induction magnet 17a,
The laminated cores 18a and 18b are held and fixed to the bobbin main body 9 by the suction force of the laminated core 1b.
The induction magnets 17a, 17
b does not stick out from the magnet insertion holes 16a and 16b.

Further, as shown in FIG. 1, when the exciting coils 14a and 14b are excited respectively, 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 laminated core 18b has the same shape. The tip of the insertion piece 19b becomes the N pole. Therefore, the south pole of the magnet 8 is the induction magnet 1
7a and the N pole of the insertion piece 19b are located at the lower left corner, 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 insertion piece 19a. 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. As a result, the valve body 6 can supply air to the engine side with the intake valve (not shown) opened.

If the insertion piece 19a is the N pole and the insertion piece 19b is the S pole, the valve element 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 that causes the valve body 6 to reciprocally rotate, the pair of exciting coils 14a and 14b and the pair of induction magnets 17 are provided.
a, 17b. Further, the exciting coils 14a and 14b are connected to the magnet insertion hole 16 of the bobbin main body 9.
Since it is housed in a and 16b, the induction magnet 17
The laminated cores 18a and 18b corresponding to the stored a and 17b
Can be made smaller, and the stator 3 can be made compact. 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, the laminated cores 18a, 18
b and the bobbin main body 9 are separately configured, the exciting coils 14a and 14b are connected to the bobbin portions 10a and 10b.
When wound around b, the exciting coils 14a and 14b can be easily wound around the bobbin portions 10a and 10b without the laminated cores 18a and 18b interfering. Moreover, the winding space of the bobbin portions 10a and 10b 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.

[0019]

As described in detail above, according to the present invention, the exciting coil can be easily wound around the magnetic pole of the laminated core to effectively use the winding space, and the permanent magnet can be fixed. There is an excellent effect that the actuator can be held in position and the actuator can be downsized.

[Brief description of 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 conventional actuator status.

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 part, 11 ... Shaft insertion hole, 14a, 14b ... Excitation coil, 15a, 15b ... Storage hole, 16a, 16b ... Magnet insertion hole, 17a, 17b ... Induction magnet, 18a, 18b
… Laminated core

Claims (1)

[Claims] 1. A bobbin in which a rotor having a magnet provided on a rotary shaft is inserted, a shaft insertion hole for rotatably inserting the rotor is provided in a bobbin main body, and an exciting coil is wound on both sides of the bobbin main body. A magnet insertion hole for inserting an induction magnet is formed in the bobbin main body on both sides of the bobbin portion, the magnet of the rotating shaft and the induction magnet are arranged to face each other, and the bobbin portion has a substantially E shape. -Shaped laminated core insertion piece is inserted to form a storage hole facing the magnet of the rotating shaft, and both ends of the substantially E-shaped laminated core are brought into contact with induction magnets inserted into the magnet insertion hole. An actuator characterized by: