JPH0311428Y2 - - 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, a drive coil section energized by alternating current power is disposed in the gap so as to be movable in the axial direction of the casing, and a cylinder section is provided concentrically on one end side of the casing. The piston and the drive coil section are substantially integrated, and the piston and the drive coil section are connected to each other via a pair of coiled resonance springs and receiving members for respectively receiving the ends of the resonance springs. The resonant spring and the receiving member form part of an energizing circuit for the drive coil portion.

(2) Prior Art Conventionally, in such a vibrating compressor, both ends of a resonant spring are simply brought into contact with a receiving member.

(3) Problems to be solved by the invention By the way, the resonant spring and the receiving member are also used as a path for the energizing current of the coil, and it is necessary to always maintain the electrical connection between the resonant spring and the receiving member. To do this, conventionally, it has been necessary to make the set load of each resonance spring relatively large in order to ensure the contact with the receiving member regardless of the extension and contraction operations of the resonance spring.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vibratory compressor that makes it possible to reduce the set load of the resonance spring.

B. Structure of the invention (1) Means for solving the problem According to the invention, in order to achieve the above object, a permanent magnet and a permanent magnet are placed inside a cylindrical casing with both ends closed. A pole piece is fixedly installed to form an annular gap therebetween, and a drive coil section energized by alternating current power is disposed in the gap so as to be movable in the axial direction of the casing, and is provided concentrically on one end side of the casing. The piston and the drive coil part that are slid together in the cylinder part are substantially integrated,
A piston and a drive coil section are floatingly supported on a casing via a pair of coiled resonant springs and receiving members for respectively receiving ends of the resonant springs, and the resonant spring and the receiving member are connected to the drive coil. In the vibrating compressor, each receiving member has a plurality of engagement protrusions that are press-fitted and engaged with the ends of the corresponding resonance springs. It is formed by cutting and raising a part.

(2) Effect According to the above configuration, since the receiving member is integrally fixed to the end of the corresponding resonant spring, the distance between the resonant spring and the receiving member can be maintained without increasing the set load of the resonant spring. electrical connection is maintained at all times.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, a compressor main body 2 is floatingly supported within a container 1 by springs 3 and 4. The casing 5 of the compressor 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 circular plate connected to the yoke 7 by bolts 10. shaped cylinder block 8
and a cap-shaped lid 9 coupled to the cylinder block 8.
It consists of

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 is arranged so as to be movable in the axial direction of the casing 5.

A cylinder portion 18 is integrally and concentrically provided in the cylinder block 8, and a cylindrical piston 19 is slidably fitted into the cylinder portion 18. A flange 16 that extends outward in the radial direction is fixed to the end of the piston 19 on the pole piece 12 side, and a support plate 15 that supports the drive coil section 17 is fixed to the outer peripheral edge of the flange 16. . Therefore, the drive coil portion 17 and the piston 19 are substantially integrated.

A disk-shaped receiving member 20 made of a conductive material is fixed to the end surface of the pole core 11 facing the piston 19 by a screw member 21. On the other hand, a disc-shaped insulating member 22 made of an electrically insulating material is brought into contact with the upper surface of the flange 16 . Moreover, this insulating member 22 includes a disc-shaped receiving member 2 made of a conductive material.
3 is buried flush with the upper surface of the insulating member 22. A resonance spring 24 formed in a coil shape and coaxial with the piston 19 is provided between the receiving members 20 and 23.
is interposed.

In FIGS. 2 and 3, a plurality of, for example, three, engaging protrusions 20a are provided on the receiving member 20 so as to be press-fitted and engaged with one end of the resonance spring 24. As shown in FIGS. These engaging protrusions 20a are formed by cutting and raising three parts equally spaced on an imaginary circle concentric with the receiving member 20, and each engaging protruding part 20a aligns with the axis of the receiving member 20. It is curved outward in a convex arc within the plane it passes through. Moreover, each engagement protrusion 20a
The outermost surface of the resonant spring 24 is determined to be located on an imaginary circle larger than the inner diameter of the resonant spring 24 when the resonant spring 24 is at its maximum contraction. Also, one of the receiving members 23 has a plurality of engaging protrusions 2, for example, three, in the same way as the receiving member 20.
3a is provided protrudingly.

Engagement projections 20a, 23 of both receiving members 20, 23
a is press-fitted and engaged with both ends of the resonance spring 24, and the receiving members 20 and 23 are fixed to both ends of the resonance spring 24.

Further, the receiving member 23 is connected to the coil of the drive coil section 17 by a lead wire (not shown).

An insulating member 26 in which a receiving member 25 is embedded, similar to the insulating member 22, is in contact with the lower surface of the flange 16, and an insulating member 27 is in contact with the cylinder block 8.
is brought into contact. A receiving member 28 is disposed on the upper surface of the insulating member 27. The receiving member 25 is provided with three protruding engagement protrusions 25a, and the receiving member 28 is provided with an outwardly bulging cylindrical engaging protrusion 28a.

A coiled resonance spring 29 concentric with the piston 19 is interposed between the receiving members 25 and 28, and the engaging protrusions 25a and 28a of the receiving members 25 and 28 are press-fitted and engaged at both ends of the resonance spring 29. Fixed.

Further, the receiving member 25 is electrically connected to the coil of the drive coil section 17.

The cap-shaped lid 9 is connected to the cylinder block 8 via a seal member 30, and a through hole 31 is bored in the cap-shaped lid 9 and the cylinder block 8 in correspondence with the insulating member 27. A connecting terminal 33 is inserted into the through hole 31 via a cylindrical insulating tube 32 made of an electrically insulating material, and this connecting terminal 33 is connected to the receiving member 28 . Also, at the bottom of the container 1,
An electrical connection member 34 is attached, and the connection terminal 33 and the electrical connection terminal 34 are connected to each other.

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 33, the receiving member 28,
Resonance spring 29, receiving member 25, drive coil section 17
An electrical closed circuit is formed which leads to the AC power source through the coil, the receiving member 23, the resonance spring 24, the receiving member 20, the pole core 11, the casing 5, the springs 3 and 4, and the container 1 in this order.

Therefore, the coil of the drive coil section 17 is energized by alternating power, and the drive coil section 17 vibrates up and down. Moreover, the vibration is caused by a pair of upper and lower resonant springs 2.
4 and 29, even if the alternating power is relatively small, the driving coil portion 17, that is, the piston 19
The amount of vibration becomes large.

In the cylinder part 18, a cylinder chamber 35 formed in front of the piston 19, that is, below the piston 19, is
As the piston 19 moves up and down together with the drive coil section 17, its volume is expanded and contracted repeatedly. 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. 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, the resonance springs 24, 29, the receiving members 20, 23, 25,
28, the receiving member 20,
Each engagement protrusion 20a, 23a, 23, 25, 28,
25a and 28a are press-fitted and engaged with both ends of the resonance springs 24 and 29. In this way, each resonance spring 24,
Even if the resonant springs 29 are repeatedly expanded and contracted in response to the vibrations of the drive coil section 17, the electrical connection between the resonant springs 24, 29 and the receiving members 20, 23, 25, 28 will not be released. Therefore, the resonant spring 24,
It becomes possible to reduce the set load of 29 to a value close to zero, and a design with sufficient margin becomes possible.

Electrical connection between the receiving member 20 and the pole core 11 is obtained by fixing the pole core 11 to the receiving member 20, but the fixing structure is not limited to the fixing by the screw member 21 of the above-mentioned embodiment.
Alternatively, the receiving member 20 may be a member press-fitted into the pole core 11.
may be fixed to the pole core 11.

Furthermore, the present invention can also be applied to a vibratory compressor in which the weight of the piston and both resonant springs has increased due to an increase in capacity or the like.

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 energized by alternating power is disposed in the gap so as to be movable in the axial direction of the casing, and a piston and the drive coil section are slidably engaged with a cylinder section provided concentrically at one end of the casing. is substantially integrated, and the piston and drive coil portion are connected to a pair of coiled resonant springs,
floatingly supported on the casing via receiving members for respectively receiving the ends of the resonant springs;
In the vibrating compressor, the resonant spring and the receiving member form a part of the current supply circuit for the drive coil portion, each receiving member includes a plurality of resonant springs in which an end portion of the corresponding resonant spring is press-fitted and engaged. Since the engaging protrusion is formed by cutting and raising a part of the receiving member, each receiving member is integrally fixed with the end of the corresponding resonant spring, so that the resonant spring Since the electrical connection between the resonant spring and the receiving member can be maintained at all times without having to particularly strengthen the set load, the vibration compressor can be operated extremely stably and precisely while reducing the set load of the resonance spring. can be activated. Moreover, since the above-mentioned engagement protrusion as a fixing means between each receiving member and the resonance spring is formed by cutting and raising a part of each receiving member,
There is no special need for fixing devices such as bolts and nuts that are separate from the receiving member, and the structure as a whole is simple and can contribute to cost reduction.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is an overall longitudinal sectional view, FIG. 2 is an enlarged plan view of a receiving member, and FIG. 3 is a sectional view taken along the line -- in FIG. 2. 5...Casing, 12...Pole piece, 1
3... Permanent magnet, 14... Gap, 17... Drive coil section, 18... Cylinder section, 19... Piston, 20, 23, 25, 28... Receiving member, 20
a, 23a, 25a, 28a...engaging protrusion, 2
4,29...Resonance spring.

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 a drive coil section energized by alternating power is arranged in the gap so as to be movable in the axial direction of the casing. , the piston and the drive coil section are substantially integrated, and the piston and the drive coil section are slidably engaged with a cylinder section provided concentrically on one end side of the casing, and the piston and the drive coil section are connected to a pair of coiled resonance springs and their resonance. A vibratory compressor that is floatingly supported on a casing via a receiving member for receiving each end of the spring, and wherein the resonant spring and the receiving member form a part of an energizing circuit for the drive coil portion, A vibratory compressor characterized in that each receiving member is formed by cutting and raising a part of the receiving member, and a plurality of engagement protrusions into which the ends of the corresponding resonance springs are press-fitted and engaged are formed by cutting and raising a part of the receiving member.