JPS6015432Y2 - electromagnetic reciprocating motor - Google Patents

Description

[Detailed description of the invention] The present invention is particularly applicable to an electromagnetic reciprocating motor of the type in which air is sucked in and discharged by the action of a piston that reciprocates by the action of electromagnetic attraction or the alternation of this action and the spring action of a compression spring. The present invention relates to the structure of a piston-related mechanism.

A fixed electromagnetic circuit having two opposing magnetic poles, and an induction coil installed in parallel with the magnetic poles sandwiched between the magnetic poles, and on the center line between the magnetic poles in a direction perpendicularly crossing the line of magnetic force generated between the magnetic poles. A combination of a reciprocating magnetic armature and a piston or a reciprocating compression spring for the combination is provided,
The electromagnetic reciprocating motor, in which the above-mentioned coupled body reciprocates due to the electromagnetic attraction action of a fixed electromagnetic circuit acting on a magnetic armature, or the alternating action of the same action and the elastic force of a compression spring, has been used in compressors, internal combustion engines, etc., in which the above-mentioned piston is used. Unlike other types of pistons, rotational motion is not converted into linear motion by a crank mechanism; instead, it is a so-called free piston, which reciprocates by receiving linear motion directly from the drive source. This type moves the combined body of the armature and piston when the electromagnetic attractive force of a fixed electromagnetic circuit acts on the armature.

Therefore, in this type of reciprocating motor, two opposing fixed electromagnetic circuits are used.
Coulomb's law, which states that the magnetic force acting between two magnetic poles is inversely proportional to the square of the distance, is applied directly to the magnetic armature that moves across the magnetic poles, and the distance between the left and right magnetic pole faces and the magnetic armature is slightly However, if there is a difference, the magnetic armature will be biased towards the magnetic pole side where the magnetic force is stronger.

Moreover, if the piston and magnetic armature are separated, the above-mentioned deviation phenomenon will greatly affect both the piston and the magnetic armature, causing uneven wear on both and impairing the movement of the combined body, resulting in fluid suction and discharge. The action will not be carried out properly.

The present invention aims to improve the center of gravity of the piston assembly of conventional electromagnetic reciprocating motors, based on the fact that the support structure of the piston in the electromagnetic reciprocating motor affects the durability of the machine and the suction and discharge functions of the fluid. This was devised for the purpose of bringing it closer to the bearing and perfecting its critical structure.One embodiment of the present invention will be described below with reference to the accompanying drawings.

The embodiment described below is a so-called single-acting electromagnetic reciprocating motor in which the backward movement of the piston is performed by the elastic force of a compression spring. It goes without saying that the present invention can also be applied to so-called double-acting electromagnetic reciprocating motors which are operated by individual circuits.

The casing 1 has two magnetic poles facing each other, and the induction coil 19 is assembled integrally in the front and rear with bolts so as to sandwich a fixed electromagnetic circuit installed in parallel with the magnetic poles. It has an air inlet 2 on one side and an air outlet 3 on the other side.

Further, the air discharge port type side of the casing 1 is formed to have a slightly smaller diameter than the other portions, and defines a cylinder 4 that accommodates a piston 11 described below so as to be able to reciprocate therein.

6 is a boss protruding from the axial center of the cylinder 4;
A guide shaft 7 is fixedly fitted in the axial direction of the body so that the line connecting the axial center line of the cylinder 4 and the center between opposing magnetic poles of the fixed electromagnetic circuit coincides with each other.

The end of the guide shaft 7 protrudes outside the casing 1, and a hemostat 8 is fixed to the protrusion, and this hemostatic 8 suppresses the one-way valve that closes the air outlet 3 from the outside, and closes the air outlet 3 from the outside. The one-way valve opens when the pressure inside the cylinder 4 rises to a required level.

Reference numeral 9 denotes a slide piece that is loosely fitted onto the guy F shaft 7 so that it can freely reciprocate.
The piston 11 housed therein and the magnetic armature 14
The piston assembly is constructed by fitting the pistons 11 and 14 together and caulking them together.

A piston head 10 of the piston 11 has a flange shape, and a piston ring 13 is fixed to the periphery of the piston head 10.

Further, the piston head 10 is provided with ventilation holes 12, and the cylinder 4 and the piston 1 are inserted into these ventilation holes 12.
A one-way valve is provided that opens only in the direction of the air pressurization chamber defined by 1 and 1, and the one-way valve opens with negative pressure when the piston 11 starts to move rightward from the position shown in the drawing.

The magnetic armature 14 moves between opposing magnetic poles of a fixed electromagnetic circuit by the electromagnetic attraction action of the same circuit, and there is a required small gap between the magnetic poles and the magnetic armature, and this gap guides the piston assembly. It is kept constant by being supported on the shaft 7.

A washer 16 is fixed to the free end of the guide shaft 7. A compression spring 17 is inserted between the washer 16 and the end face of the magnetic armature 14, and when the fixed electromagnetic circuit is demagnetized, this compression spring The piston assembly is designed to return to the state shown in the drawings after a burst attack of 17.

Next, the operation of the above embodiment will be explained.

When half-wave alternating current is applied to the fixed electromagnetic circuit, the induction coil 19
The fixed iron core 18 wound with is excited, an electromagnetic attraction occurs between the fixed iron core 18 and the magnetic armature 14, and the magnetic armature 14 is pulled in the direction of the fixed iron core 18 against the elastic force of the compression spring 17. and enters between the opposing magnetic poles of the fixed electromagnetic circuit.

Therefore, the piston 11, which is a unit connected to the armature 14, moves on the guide shaft 7 rightward in the drawing.

Therefore, the pressure inside the air pressurizing chamber defined by the cylinder 4 and the piston 11 decreases, and the piston head 1
The valve of the ventilation hole 12 of No. 0 opens and air flows into the air pressurization chamber.

When the voltage of the commercial power source becomes O due to half-wave rectification, the fixed iron core 18 is demagnetized, so the attractive force of the magnetic armature 14 caused by the fixed electromagnetic circuit disappears, and the elastic force of the compression spring 17 causes the magnetic armature 14 and the piston 11 to The combined body is moved on the guide shaft 7 to the left in the drawing.

As a result, the pressure inside the air pressurizing chamber defined by the cylinder 4 and the piston 11 increases, so the air inside the chamber is compressed, and when the piston 11 reaches near the top dead center, the valve of the air discharge port 3 opens. Air is sent out from the air pressurization chamber.

The above action is performed once per cycle of the commercial power supply, and the above-mentioned piston The combination reciprocates repeatedly, during which air is continuously sucked in and discharged.

When the magnetic armature crosses the magnetic field generated between the opposing magnetic poles when the fixed electromagnetic circuit is excited, the magnetic force acting between the magnetic poles and the magnetic armature is proportional to the strength of the magnetic amount of both poles, and Although it is inversely proportional to the square of the distance (gap) (Coulomb's law), since the magnetic armature 14 and the piston 11 are both supported by the guide shaft 7 and reciprocate as one, the gap between the magnetic armature and the magnetic pole is constant. Even if the magnetic amount of the right magnetic pole and the left magnetic pole are different, the magnetic armature will not be attracted to the one with the larger magnetic amount, and therefore the combination of the magnetic armature and the piston maintains a state of alignment and reciprocates.

The present invention has been described above based on the embodiments, but the present invention includes a fixed electromagnetic circuit having two roughly carved magnetic poles, and an induction coil sandwiching the magnetic poles and installed in parallel, and between the magnetic poles. A combination of a magnetic armature and a piston that reciprocates in a direction perpendicularly crossing the lines of magnetic force generated between the magnetic poles, or a reciprocating compression spring of the combination is provided on the center line of the fixed electromagnetic circuit acting on the magnetic armature. An electromagnetic reciprocating motor in which the above-mentioned combined body reciprocates by an electromagnetic attraction action or an alternating action of the electromagnetic attraction action and the elastic force of a compression spring, wherein a cylinder in which a piston is accommodated in a casing in which the fixed electromagnetic circuit is installed so that the piston can freely reciprocate. Since the combined body is supported in a reciprocating manner by a guide shaft having one end fixed to the axial center of the cylinder, the following effects are achieved.

1. A combination of a magnetic armature and a piston is supported on a guide shaft and reciprocates from beginning to end on a line connecting the center between two opposing magnetic poles of a fixed electromagnetic circuit and the axis of the cylinder, causing differences in the magnetic amount of the magnetic poles. Even if there is a problem, the above-mentioned coupling body will not be biased, so uneven wear of the piston coupling body will not occur.
The reciprocating motion of the combined body is stable.

2. Since the cylinder and the casing are integrally constructed, it is easy to align the magnetic pole center of the fixed electromagnetic circuit installed in the casing with the cylinder axis, and this also works in conjunction with the fact that the piston assembly is supported by the guide shaft. Therefore, the structure in which the cylinder, the piston assembly and the magnetic poles are mutually contained can be perfected, and the durability is significantly improved.

[Brief explanation of the drawing]

The accompanying drawing is a longitudinal cross-sectional side view of one embodiment of the present invention. 1...Casing, 4...Cylinder,
7... Guide shaft, 10... Zeston head, 11... Curved Zeston, 14... Magnetic armature, 18... Curved/fixed iron core, 19... Induction coil.

Claims (1)

[Scope of utility model registration request] It is equipped with a fixed electromagnetic circuit in which two opposing magnetic poles are placed in parallel with a bent induction coil sandwiching the magnetic poles, and reciprocates on the center line between the magnetic poles in a direction perpendicularly crossing the line of magnetic force generated between the magnetic poles. A combination of a moving magnetic armature and a piston or a reciprocating compression spring of the combination is provided, and the electromagnetic attraction action of a fixed electromagnetic circuit acting on the magnetic armature or the alternation of the same action and the spring force of the zero compression spring can be used to achieve the above-mentioned effects. An electromagnetic reciprocating motor in which a coupled body reciprocates, wherein a cylinder for reciprocatingly accommodating a piston is integrally provided in a casing in which the fixed electromagnetic circuit is installed, and one end of the guide is fixed to the axial center of the cylinder. An electromagnetic reciprocating motor in which the above-mentioned combined body is supported for reciprocating motion by a shaft.