JP2867082B2 - solenoid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid, and more particularly to a structure of a solenoid that facilitates high-speed operation of a movable iron core.

[0002]

2. Description of the Related Art The structure of a magnetic circuit of a solenoid, particularly a solenoid for facilitating high-speed operation, uses a silicon-containing iron material having excellent magnetic properties in a high frequency range as a magnetic material, and an electrically insulating structure as an iron core. The thing of the shape which laminated | stacked many ultra-thin plates through the layer is used.
The structure of a conventional solenoid having the above-described configuration of the magnetic circuit is exemplified in the perspective configuration diagrams of FIGS.

In FIG. 1 and FIG. 2, reference numeral 1 denotes an exciting coil;
Is a fixed core, 3 is a movable core, A is a leg of the fixed core 2, and the fixed core of FIG. 1 is formed by the fixed core 2 in which E-shaped thin iron plates are stacked, and the fixed core of FIG. Is formed by combining two sets of fixed core portions 2 in which U-shaped strip-shaped thin iron plates are stacked so that the outer sides of the legs are aligned. In general, FIG. 1 shows a method of stacking E-shaped thin plates by press punching, and FIG. 2 shows a means of forming a U-shape by winding a band-shaped plate into a 0-shape and cutting it into two parts. Used.

Next, the U-shaped fixed iron core 2 shown in FIG.
A description will be given of the two fixed cores connected with each other with reference to the fixed core arrangement diagram of FIG. FIG. 3A shows a front view, and FIG. 3B shows a side view. The same reference numerals as those in FIGS. 1 and 2 denote the same parts (the same applies hereinafter). “a” is the dimension of each side of the open end B of the fixed core 2, that is, the side of the suction surface with the movable core 3, and is also the dimension of each side of the cross section of the movable core 3. In addition, l1 and l2 indicate the inner space and the outer space of the open end B of the leg portion A, respectively, and L1 is twice the size of the outer space and the length of the movable core 3. In the layout drawing, the relational dimensions that facilitate understanding of the description are selected.

[0005]

Generally, the operating speed of the solenoid increases as the weight of the movable iron core 3 decreases as long as the magnetomotive force is the same. However, in the conventional structure of FIG. 3, the weight of the movable iron core 3 is a × a × L1 × material specific gravity, and L1 is (a + a + l1) × 2, and a is determined by a required magnetic path cross-sectional area. , L1 is the exciting coil 1
In order to penetrate into the leg portion A, a predetermined inner space is required at the open end B, and there is a limitation on weight reduction. Therefore, there have been difficulties in obtaining a high-speed solenoid, and in reducing the size and weight.

[0006]

The main feature of the present invention is to use a fixed iron core, in which legs of two sets of fixed iron cores are entangled with each other so as to be in contact with each other inside the legs, as a solenoid. . A lightweight, compact, lightweight solenoid is obtained by reducing the weight of the movable iron core.

[0007]

FIG. 4 is a perspective view showing the internal structure of a solenoid according to an embodiment of the present invention, FIG. 5 is an external perspective view, and FIG. 6 is a layout diagram of a fixed iron core. As shown in FIG. 4 and FIG.
Are arranged so that the legs A are intertwined with each other, and are connected so that the inside of the legs A of one set of fixed cores 2 and the inside of the other set of fixed cores 2 are in contact with each other near the open end B. It constitutes a fixed iron core.

FIG. 6A is a front view and FIG. 6B is a plan view. As shown in FIG. 6A, the leg A of the fixed core 2 is shown in FIG.
The opening end B is not a cut surface at a right angle to the length direction, but a constant inclined surface. Next, the legs A of the two fixed iron cores 2
Is set to a predetermined angle as shown in (a), and the open end B is arranged as shown in (b). Further, the open ends B arranged in the figure (b) form an adsorption surface of the movable iron core 3.

Referring to FIGS. 6B and 3B, the arranged open ends B, that is, the suction surface areas are compared. In both figures, the center contact opening end and the two outer opening ends are magnetically different. The dimension of the suction surface area in the longitudinal direction is L2 <2l2 in FIG. 6B of the present invention, and FIG.
In (b), since L1 = 2l2, L1> L2. Therefore, the length of the movable iron core 3 arranged opposite to the suction surface area is shorter in the solenoid of the present invention. Therefore, as is clear from the above description, the weight of the movable iron core 3 can be reduced, so that the solenoid can operate at high speed, and at the same time, a reduction in size and weight has been achieved.

In FIG. 4, the exciting coil 1 is divided into two sets of two fixed iron cores 2 and has a series connection structure at the ends of the coil wires. However, a parallel connection structure may be used depending on the characteristic requirements.

FIG. 5 is a perspective view of the external appearance, in which the components shown in the perspective view of the internal structure of FIG. 4 are incorporated in the case 4. The case 4 has a mounting hole 5 and an electric connection portion 6. The movable core 3 is provided so as to face the open end B (not shown in FIG. 5) of the fixed core portion 2. The case 4 is formed by resin sealing or a metal case. The movable iron core 3 may be used by being connected to a movable structure on the object side to be operated.

In operation, a control power supply is connected to the electric connection section 6, and a magnetic force is generated in the fixed iron core by the excitation coil.
Adsorb the movable iron core. Further, by providing a return spring on the movable iron core, it becomes possible to repeatedly perform the operation of attracting and detaching the movable iron core with turning on and off the excitation current of the control power supply.

In the embodiment of the present invention, even if the mounting position of the exciting coil is changed, the appearance such as the case is changed, and other changes such as deformation of each part and addition of other parts are made within the scope of the gist of the present invention. , Are included in the rights of the present application.

[0014]

As described above, in the solenoid of the present invention, the legs of the two sets of fixed cores are engaged with each other and connected so as to be in contact with the inside of the legs.
High-speed operation is possible, and small size and light weight can be achieved.
Therefore, the present invention can be widely used in various industries, such as a valve section of a fuel injection device for an internal combustion engine and a valve section of a flow rate adjusting device using a high-speed pulse used for hydraulic control, and is highly effective.

[Brief description of the drawings]

FIG. 1 is a perspective configuration diagram of a conventional solenoid.

FIG. 2 is a perspective view of another conventional solenoid.

FIG. 3 is a layout diagram of a fixed iron core of a conventional solenoid.

FIG. 4 is a perspective view of an internal structure showing an embodiment of the present invention.

FIG. 5 is an external perspective view showing an embodiment of the present invention.

FIG. 6 is a layout diagram of a fixed iron core showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Excitation coil 2 Fixed iron core 3 Movable iron core 4 Case 5 Mounting hole 6 Electric connection part A2 leg B2 open end a, l1, l2, L1, L2 Specified dimensions

Claims (2)

(57) [Claims] A fixed core comprising two sets of a fixed core having two legs, an excitation coil mounted on the fixed core,
And a solenoid provided with a movable core opposed to the open end of the fixed core, wherein the legs of the two sets of fixed cores are entangled with each other and connected so as to be in contact with the inside of the legs. Solenoid. 2. The solenoid according to claim 1, wherein an open end of the fixed core portion serving as a suction surface to the movable iron core is inclined with respect to a length direction of the leg portion.