JPS59144357A - Rotary solenoid - Google Patents

Abstract

PURPOSE:To effectively operate a rotary solenoid by projecting the vicinity of the end of a stator pole in the rotating direction, and providing an auxiliary attracting pole for generating attracting force, thereby maintaining the rotary force characteristic to the rotating angle constant. CONSTITUTION:Left and right nonmagnetic plates 8a, 8b, left and right nonmagnetic stator discs 9a, 9b of stator poles 1a, 1b and a middle common stator disc 9c are secured to the inner periphery of a stator frame 7 made of a magnetic material to form a stator 1. Magnetic rotors 15a, 15b and a common magnetic rotor 15c are secured to a rotational shaft 14 to form a rotor 3. This shaft 14 is inserted into a bearing 16 to construct a rotary solenoid. Auxiliary attracting poles 1A, 1B are provided at the ends of the poles 1a, 1b in the rotating direcrion, and the rotary force of the rotor 3 becomes constant in the all range of the rotating angle by the poles 1A, 1B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary renoid that maintains a substantially constant rotational force over the entire rotational angle range.

A so-called rotary solenoid, which utilizes rotational force generated by attraction between a stator and a rotor, is often used as an electromagnetic operation source for devices that require relatively large rotational driving force for control, such as valves. However, since the conventional type has the configuration described below, there is a drawback that the rotational force obtained at the rotating shaft decreases as the rotor rotates, and there is a large possibility that the opening and closing of the valve will become uncertain.

In other words, as shown in the principle diagram shown in Fig. 1, a conventional rotary solenoid is supported within a space of a stator (1) having stator poles (la) and (ib) by a rotating shaft (2) coaxial with the stator (1). Rotor (3) with rotor type (3aXab)
will be established. Then, the stator (1
), stator poles (1aX1b): rotor type (
By generating suction force between 3a and 3b, the rotor (3)
is rotated in the direction of the arrow in the figure to generate a unidirectional rotational force on the rotating shaft (2). In addition, when this is used for bidirectional rotational operations such as opening and closing a valve, the stator poles (1a) of the respective stators (1) and (1') of the two sets of rotary lunaroids configured as described above are used. (1
b) are combined by shifting the rotation angle α as shown in the principle diagram shown in FIG. In addition, the rotor type (3am (3b)) of the rotor (3) (3') is coaxially combined with the rotation shaft (2) so that it is shifted by the rotation angle α, and at the same time, the rotor (3>
A rotation angle regulating column (4) (4') provided at (3'),
The stator (i) (1') and rotor (3) (3') are connected by the rotation angle regulating holes (5) (5') provided on the Kenneth side.
The stator (1) is configured so that it can rotate by an angle α while maintaining the relative relationship as shown in the figure, and is
By alternately energizing (1'), the rotating shaft (2)
Make it rotate in both directions.

However, with conventional rotary lean lenses like this,
The attractive force acting between the stator poles and rotor poles is the stator pole (la
) (lb), one corner (3a') (3b') of the rotor type (3a) (3b)
) is at its maximum when the rotor is rotated by α degrees as shown by the dotted line in the figure, and the attractive force is zero at the point where its center line coincides with the center line of the stator pole, that is, at the equilibrium point. becomes. As a result, as shown in Figure 3, the nominal rotational force P generated on the rotating shaft decreases as the rotation angle of the rotor increases, resulting in a lack of driving force and unstable control. do.

The present invention aims to eliminate the drawbacks of conventional rotary solenoids as described above! -, and the details will be explained next using the drawings.

The features of the present invention are as follows. That is, as shown in the principle diagram shown in FIG.
Auxiliary suction electrode (IAX) that generates suction force between the side of
113) is provided, thereby exerting a suction force on the side surface (3AX3B) of the rotor type to supplement the suction force between the top surfaces of the stator pole and the rotor pole that increases as J rotates. It is in. As shown in the relationship diagram of rotation angle versus rotation force shown in Fig. 3, the rotation force P of the conventional rotary lean renoids is
The drawbacks of the conventional device are overcome by applying the rotational force Q from the auxiliary attraction poles (IA) (IB) so that the rotational force R generated on the rotational shaft (2) is almost constant over the entire rotational angle range. With this in mind, the present invention can also be applied to multi-pole cases where the stator poles and rotor types are two or more as described above. That is, as shown in the principle diagram of Fig. 5, the stator poles and rotor types are (1aX1bX1c) and (3
In the three-pole case of a) (3b) and (3c), the purpose can be achieved by providing an auxiliary attraction pole (IAXIBXIC) on each of the stator poles.

Next (r'c) A vertical cross-sectional view of an embodiment of the present invention shown in FIG. 6 and A-A in FIG. 6 shown in FIGS.
'section, B-B', C-C' section, arrow sectional view
Indicated by -. Conventional bidirectional rotary lean lenses are made by combining two unidirectional rotary lenses as described above. However, this has the disadvantage that the 4# structure is complicated, the shape and dimensions are large, and the cost is high.The embodiment shown in Figs. The rotation angle is approximately constant within the specified rotation angle range. In Figure 6 (7)
are cylindrical stator frames made of magnetic material, (8a) (8b
) are left and right side plates made of non-magnetic material, and these form a case that becomes part of the magnetic path of the stator. (9a) (
9b) is a left and right stator disk made of a magnetic material, and when the left and right side plates (8a x 8b) are fitted into both left and right ends of the cylindrical stator frame (7), the outer peripheral end surface becomes the same as the cylindrical stator frame. body (7)
It is fixed to the left and right side plates (8aX8b) by screws or the like so as to be in contact with the inner circumferential surface of. (9c) is an intermediate common stator disk made of a magnetic material, and is fixed to the inner circumferential surface of the central portion of the cylindrical stator frame (7). And each stator disk (9a
) (9b) (as shown in Fig. 7(a) and (b), the stator poles (10aX10a') (10
b) (10b') and the auxiliary suction electrode (1iaX11a'X
11bX11b').The rotor rotation space (12a
) (12b> is provided. Also, an intermediate common stator disk (
9c) coaxially with the rotation spaces (12a) and (12b),
A rotation space (12c) having a diameter slightly larger than the length of the rotor is provided. (13a) and (13b) are annularly wound excitation windings, respectively. (1 is the rotation axis, (15a) (
15b) is a rotor made of magnetic material, and rotor type (15b) is a rotor made of a magnetic material.
a')(15a")(15b')(15b"). (15c) is a magnetic common rotating body, rotor (1
The rotor (15a) (1
5'b), etc., are fixed to the rotation axis 0→.

(16a) (16b) are bearings, (17a) (17b)
is a gear spacer, and the left and right side plates of the rotor (8a
) (8b). α smell is on the side plate (
The rotation angle regulating hole (see FIG. 7) provided in 8a) and the rotation angle regulating column α provided on the side surface of the rotor regulate the rotation angle. (E) is a rotational position holder for the rotor made of an elastic material, so that the bent end portion is pressed against the inner surface of the side plate (8a) with an appropriate force against the side of the rotor (15a). The rotation angle of the rotor is maintained until a reverse rotational action is applied.

With this configuration, when excited only by the excitation winding (13a), the magnetic flux in the direction shown by the dashed line in FIG. )→Rotor (15a)→Left stator disk (9a
) → occurs in the path of the stator frame (7), and the rotor (15
a) is the 7th m, rotated by α degrees in the direction of the arrow in (a),
Due to the action of the auxiliary suction poles (11a) and (11a'), the rotational force becomes almost constant within the entire angular range, and has sufficient force to open a valve connected to, for example, the rotation axis α→. When the excitation winding (13b) is excited, the magnetic flux shown by the dashed-dotted line in FIG. 6 is generated, and the rotor (15b)
It rotates in the direction of the arrow in Figure (b), that is, in the opposite direction to that described above, and the rotational force remains almost constant due to the action of the auxiliary suction poles (llb) (llb'). Therefore, the valve is reliably closed with sufficient driving force.

As is clear from the above description, according to the present invention, it is possible to provide a rotary solenoid whose rotational force characteristics with respect to rotational angle are substantially constant within a specified rotational angle.
It has excellent advantages such as being able to be used to control the opening and closing of valves to ensure reliable operation.

[Brief explanation of drawings]

Figure 1 is a principle diagram of a unidirectional rotary solenoid.
Figure 2 is a diagram of the principle of a bidirectional rotating type rotary Lenoite.
Fig. 3 is a rotation angle vs. rotational force characteristic diagram, Fig. 4 is a principle diagram of the present invention, Fig. 5 is a principle diagram when the stator poles are three poles, and Fig. 6 is a diagram of one embodiment of the present invention. Cross-sectional view, Figure 7 (a) (b
) (c) is a cross-sectional view taken along arrows A-A', B-B', and c-c' in FIG. (1) (, j') - = stator, (la) (1bX1c)
- Stator pole, (2) ... Rotating shaft, <3) (3')
... Rotor, (3aX3b) (3c) -'-Rotor pole, (IAXIBXIC) ... Auxiliary suction pole, (7)
...Stator frame made of magnetic material, (8aX8b)...Right and left side plates made of non-magnetic material, (9aX9b) - Left and right stator discs made of magnetic material, '(9c)...Middle common fixing made of magnetic material Child disk, (1oa)Ooa')OobX1ob')...Stator pole, (11aX11a'X11bX11b') -
Auxiliary attraction poles, (12a) (12b) (12c) - Rotating space, (13a) (13b) ... Excitation winding, α fathom
... Rotating shaft, (15a) (15b) ... Rotator made of magnetic material, (i5c) - Rotating body made of magnetic material, (16a) (16b
) -...Bearing, (17a) (17b)...Gap spacer, α barrel...Rotation angle regulation hole, α...Rotation angle regulation pillar, (A) 2...Rotor rotational position maintenance body. Patent applicant Shindengen Kogyo Co., Ltd. agent Inuzuka 1 person from outside the university

Claims (1)

[Claims] (1) A rotary lean renoite characterized in that an auxiliary suction pole of the rotor is provided near the end of the stator pole in the rotational direction.