JPH0311429Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention is a vibratory compressor, in particular, a cylindrical casing with both ends closed, and a permanent magnet with an annular structure between the permanent magnet and the cylindrical casing. A pole piece that forms a gap is fixedly installed in the gap, and in the gap, a drive coil section consisting of a coil energized by alternating power and wound around a bobbin is disposed so as to be movable in the axial direction of the casing, and one end of the casing A piston that slides into a cylinder part provided concentrically on the side and the drive coil part are substantially integrated and are floatingly supported by the casing via a pair of resonant springs. related to things.

(2) Conventional technology Conventionally, in this type of vibratory compressor, in order to integrate the drive coil section and the piston, the gap between the flange fixed to the piston and the drive coil section was removed before assembly to the casing. It is fixed in advance by spot welding, etc.
(see publication).

(3) Problems to be solved by the invention By the way, with the above conventional method, it is necessary to perform special fixing work between the drive coil part and the flange, resulting in poor workability and increased manufacturing costs. is also unstable.

The present invention was devised in view of the above circumstances, and aims to improve workability and stabilize quality by making it possible to substantially integrate the drive coil section and the piston extremely easily and reliably. The purpose of the present invention is to provide a vibratory compressor with improved design.

B. Structure of the device (1) Means for solving the problem In order to achieve the above object, the present invention has a cylindrical casing with both ends closed, and a permanent magnet between the permanent magnet and the permanent magnet. A pole piece is fixed to form an annular gap, and in the gap, a drive coil section consisting of a drive coil energized by alternating power and wound around a bobbin is disposed so as to be movable in the axial direction of the casing. A flange that contacts one end of the drive coil part on one side is fixed to the piston that slides on a cylinder part provided concentrically on one end of the casing, and a flange that contacts one end of the drive coil part and the other end of the drive coil part and the casing. A first resonant spring biases the drive coil portion toward the flange, and a second resonant spring biases the flange toward the drive coil between the other side of the flange and the casing. are respectively interposed, and the drive coil portion and the flange are sandwiched between the two resonance springs.

(2) Effect According to the above configuration, the drive coil portion biased toward the flange by the first resonance spring and the flange biased toward the drive coil by the second resonance spring are in pressure contact with each other. Since the drive coil part and the piston are held elastically between the clamping springs, the drive coil part and the piston are substantially integrated without any special fixation therebetween.

(3) Embodiment Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. First, in FIG. Supported. The casing 5 of the compressor main body 2 includes a bottomed cylindrical upper end wall 6, a cylindrical yoke 7 coaxially welded to the upper end wall 6, and a thick disk-shaped yoke 7 joined to the yoke 7 by bolts 10. It consists of a cylinder block 8 and a cap-shaped lid 9 connected to the cylinder block 8.

A pole core 11 is fixed to the upper end wall 6, and a ring-shaped permanent magnet 13 is fixed to the inner surface of the yoke 7, facing a cylindrical pole piece 12 that is integrally provided at the free end of the pole core 11. will be established.
In the annular gap 14 between the permanent magnet 13 and the pole piece 12, a cylindrical drive coil portion 17 formed by winding a coil 16 around a bobbin 15 is arranged so as to be movable in the axial direction of the casing 5. Ru.

A cylinder portion 18 is integrally and concentrically provided in the cylinder block 8.
A cylindrical piston 19 is slidably connected to the cylindrical piston 8 . The piston 19 is substantially integrated with the drive coil section 17 by means described below, and the drive coil section 17 and the piston 19 are connected to a pair of resonant springs 2.
It is floatingly supported on the casing 5 by 0 and 21.

Both resonance springs 20 and 21 are formed into a coil shape with a diameter corresponding to the diameter of the drive coil portion 17. A receiving plate 22 made of a conductive material is fixed to the inner surface of the upper end wall 6 so as to surround the pole core 11 , and the receiving plate 22 receives the upper end of the first resonant spring 20 . Further, an annular receiving plate 23 made of a conductive material is in contact with the upper end of the drive coil portion 17, and the lower end of the first resonance spring 20 is in contact with the receiving plate 23. Moreover, this receiving plate 23 is
6.

A flange 24 extending outward in the radial direction is fixed to the end of the piston 19 on the drive coil section 17 side, and the upper surface of the outer peripheral edge of the flange 24 abuts the lower end of the drive coil section 17 . An insulating plate 25 made of electrically insulating material is provided on the lower surface of the outer peripheral edge of this flange 20.
is brought into contact. On the other hand, an insulating member 26 made of an electrically insulating material is brought into contact with the inner surface of the cylinder block 8. The insulating plate 25 includes a receiving plate 2 made of a conductive material and electrically connected to the coil 16.
7 is brought into contact with the insulating member 26, a receiving plate 28 made of a conductive material is disposed so as to face the receiving plate 27, and a second resonant spring 21 is interposed between the receiving plates 27 and 28. equipped.

Therefore, the flange 2 integral with the piston 19
4 and the drive coil section 17 are both resonant springs 20,
The piston 19 and the drive coil section 17 can be substantially integrated by simply bringing the flange 24 and the drive coil section 17 into contact with each other.

The cap-shaped lid 9 is connected to the cylinder block 8 via a seal member 29, and a through hole 30 is bored in the cap-shaped lid 9 and the cylinder block 8 in correspondence with the insulating member 26. A connecting terminal 32 is inserted into the through hole 30 via a cylindrical insulating tube 31 made of an electrically insulating material, and the connecting terminal 32 is connected to a connecting plate 33 fixed to the receiving portion 28 . Further, an electrical connection member 34 is attached to the lower end of the container 1, and the connection terminal 32 and the electrical connection member 34 are attached to the lower end of the container 1.
are interconnected.

An AC power source and a switch (not shown) are interposed in series between the electrical connection member 34 and the container 1, and due to the conduction of the switch, the electrical connection member 34, the connection terminal 32, the connection plate 33, and the receiving plate are connected to the AC power source. 28, resonance spring 21, receiving plate 27, coil 1
6, a receiving plate 23, a resonant spring 20, a receiving plate 22, a casing 5, springs 3 and 4, and a container 1 in order to form an electrical closed circuit that leads to an AC power source.

Therefore, the coil 16 of the drive coil section 17 is
The drive coil section 17 is energized by alternating power and vibrates up and down. Moreover, since the vibrations are amplified by the pair of upper and lower resonance springs 20 and 21, even if the power to energize the coil 16 is relatively small, the driving coil part 17
In other words, the amount of vibration of the piston 19 becomes large.

The cylinder chamber 35 formed in front of, or below, the piston 19 within the cylinder section 18 repeatedly expands and contracts in volume as the piston 19 moves up and down together with the drive coil section 17. In order to cause the fluid in the low pressure chamber 36 formed in the casing 5 to flow into the cylinder chamber 35 through the inside of the piston 19 when the volume of the cylinder chamber 35 is expanded, a suction valve device 37 is provided at the front end, that is, the lower end of the piston 19. is provided. Also, a high pressure chamber 38 defined between the cylinder block 8 and the cap-shaped lid 9
Furthermore, a discharge valve device 39 is disposed between the cylinder block 8 and the cap-like lid 9 in order to discharge the fluid in the cylinder chamber 35 when the volume is contracted.

A suction pipe (not shown) is connected to the low pressure chamber 36, and this suction pipe is drawn out through the container 1. In addition, the high pressure chamber 38 has a discharge pipe (not shown).
is connected, and this discharge pipe also passes through the container 1 and is drawn out.

Next, to explain the operation of this embodiment, when the drive coil portion 17 and the piston 19 are integrated, a flange 24 fixed to the piston 19 is used.
is in contact with the drive coil part 17, and the drive coil part 17
The drive coil portion 17 and the flange 24 are held between resonance springs 20 and 21 which are formed into a coil shape and have a diameter corresponding to the diameter. Therefore, welding work between the drive coil portion 17 and the flange 24, which was conventionally required, is no longer necessary, and substantial integration can be performed extremely easily and reliably.

FIG. 2 shows another embodiment of the present invention, and parts corresponding to those of the previous embodiment are given the same reference numerals. What should be noted in this embodiment is that the flange 24 fixed to the piston 19 is basically formed into a bottomed cylindrical shape with a slightly larger diameter than the pole piece 12; Since the pole piece 12 is allowed to enter the flange 24 when the piston 16 and the piston 19 vibrate, the axial length of the compressor main body 2 can be shortened and made compact.

The present invention is applicable not only to a vibratory compressor in which the cylinder portion 18 is provided on the cylinder block 8 as in each of the above embodiments, but also to a vibratory compressor in which the cylinder portion is provided on the pole piece 12 side. be.

C Effect of the invention As described above, according to the invention, a permanent magnet and a pole piece that forms an annular gap between the permanent magnet and the permanent magnet are fixed in a cylindrical casing with both ends closed. A drive coil section, which is a coil energized by alternating power and wound around a bobbin, is disposed in the gap so as to be movable in the axial direction of the casing, and a drive coil section is disposed in the gap so as to be movable in the axial direction of the casing. A flange whose one side abuts one end of the drive coil portion is fixed to the piston to be slid together,
Between the other end of the drive coil section and the casing, there is a first
A second resonance spring is interposed between the other side of the flange and the casing, and a second resonance spring is interposed between the two resonance springs to bias the flange toward the drive coil. Since the flange is clamped, the drive coil section biased toward the flange by the first resonance spring and the flange biased toward the drive coil by the second resonance spring maintain a pressure contact state with each other. This means that the drive coil section and the piston are essentially integrated without any special fixing between them, so the fixing work can be omitted. This can contribute to reducing manufacturing costs and stabilizing quality. Further, since there is no need to provide a special fixing device between the drive coil section and the piston, it is possible to contribute to the simplification of the structure.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of another embodiment of the present invention. 5...Casing, 12...Pole piece, 1
3... Permanent magnet, 14... Gap, 15... Bobbin, 16... Coil, 17... Drive coil section, 1
8...Cylinder part, 19...Piston, 20...
First resonant spring, 21...Second resonant spring, 24
...Flange.

Claims (1)

[Scope of utility model registration request] Inside a cylindrical casing with both ends closed,
A permanent magnet and a pole piece forming an annular gap between the permanent magnet are fixedly installed, and in the gap is a drive coil portion formed by winding a drive coil energized by alternating power around a bobbin. A flange whose one side abuts one end of the drive coil section is fixed to a piston that is arranged to be movable in the axial direction of the casing and is slidably engaged with a cylinder section provided concentrically on one end side of the casing. A first resonant spring is provided between the other end of the drive coil portion and the casing for biasing the drive coil portion toward the flange, and a first resonant spring is provided between the other side of the flange and the casing for biasing the flange. A vibratory compressor, characterized in that second resonant springs are interposed to bias the coil side, and the drive coil portion and the flange are sandwiched between the two resonant springs.