JPH0110453Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Field of Application This invention consists of a cylindrical yoke with one end closed and the other end closed with a closing member.
A permanent magnet and a pole piece forming an annular gap between the permanent magnet and the pole piece are fixedly disposed, and a drive coil energized by alternating power is movable in the axial direction of the casing. The present invention relates to a vibratory compressor in which a piston that is arranged and is substantially integral with the coil is slidably engaged with a cylinder portion provided in the closing member.

(2) Conventional technology Conventionally, in such a vibrating compressor, a screw hole is bored in the other end surface of the yoke, and a screw member passing through the closing member is screwed into the screw hole and tightened, thereby closing the closing member. It is fixed to the other end of the yoke.

(3) Problems to be solved by the invention In the above-mentioned conventional technology, in order to drill a screw hole in the other end surface of the yoke, the wall thickness of the other end of the yoke must be increased at least in the area of the screw hole. However, in the thick portion, the inner surface of the yoke had an undercut shape, making machining complicated. In addition, in order to minimize the length of the thick portion along the axial direction of the casing, a cylindrical inclusion having a screw hole into which a screw member can be screwed is provided between the other end of the yoke and the closing member. It was necessary to do so. For this reason, it is necessary to increase the processing accuracy to align the yoke and the closing member, and since the length under the neck of the screw member becomes longer, it is necessary to provide the screw member with greater strength, which increases cost. Become.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a vibratory compressor that does not require inclusions, facilitates processing, and allows the strength of the screw member to be set relatively low. do.

B. Structure of the invention (1) Means for solving the problems According to the invention, a mounting plate having a screw hole along the axial direction of the casing is attached to the inner surface of the other end of the yoke, and the closing member is attached to the inner surface of the other end of the yoke. It is fixed to the other end of the yoke by a screw member that passes through the closing member and is screwed into the screw hole.

(2) Effect By attaching a mounting plate with a screw hole to the inner surface of the other end of the yoke, it becomes unnecessary to drill a screw hole at the other end of the yoke, and as a result, a thick wall section can be formed at the other end of the yoke. There is no need to provide an undercut shape on the inner surface of the yoke. Therefore, processing of the inner surface of the other end of the yoke is facilitated, a cylindrical inclusion is not required, and the length under the neck of the threaded member can be shortened, so there is no need to increase the strength of the threaded member.

(3) Embodiment Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. First, in FIG. The compressor main body 3 is floatingly supported by springs 4 and 5 in a vertically long cylindrical sealed container 2.

The casing 6 of the compressor main body 3 is configured by closing one end, that is, the upper end, and fixing a closing member 8 to the other end, that is, the lower end of a cylindrical yoke 7 that extends up and down. That is, the closing member 8 is basically formed into a thick disk shape, and is fitted to the lower end of the yoke 7. Moreover, a plurality of mounting plates 9 are attached to the inner surface of the lower end of the yoke 7, and by screwing and tightening the screw members 10 that pass through the closing member 8 to the mounting plates 9, the closing member 8 is attached to the lower end of the yoke 7. Fixed.

In order to fit the closing member 8 into the yoke 7, a large-diameter fitting hole 12 is provided at the lower end of the yoke 7 via a step 11 facing downward. On the other hand, the closing member 8 is provided with a small-diameter fitting protrusion 14 that can be fitted into the large-diameter fitting hole 12 via a step 13 that faces upward and comes into contact with the lower end surface of the yoke 7 .

In FIG. 2, on the inner surface of the lower end of the yoke 7,
A mounting groove 15 is bored around the entire circumference at a position close to the stepped portion 11. In addition, the mounting plate 9 has a mounting groove 15.
The mounting plate 9 is formed into a rectangular shape with a thickness corresponding to the width of the mounting plate 9, and a screw hole 16 is bored in the mounting plate 9.

In FIG. 3, the mounting plate 9 is fitted into the mounting groove 15. The mounting grooves 15 are caulked from the stepped portion 11 side on both sides of the mounting plate 9 in the fitted state. The position of the mounting plate 9 in the mounting groove 15 is determined by these caulked portions 15a and 15b. Such a mounting plate 9 is fitted and attached to the yoke 7 at a plurality of positions spaced apart from each other in the circumferential direction of the yoke 7.

Referring again to FIG. 1, the closing member 8 is provided with a plurality of mounting holes 17 along the axial direction of the casing 6 at positions corresponding to the screw holes 16 of each of the mounting plates 9. Each mounting hole 17 is made up of a small diameter part 18 and a large diameter part 19 which are successively arranged from above.
8 and the large diameter portion 19 is a locking step portion 2 facing downward.
0 is set. A screw member 10 having a head 10a that engages with the locking stepped portion 20 is inserted into the mounting hole 17, and by screwing the screw member 10 into the screw hole 16 and tightening it, the closing member 8 is closed. It is fixed to the other end of the yoke 7.

Inside the casing 6, an arcuate permanent magnet 21 is fixed to the inner surface of the yoke 7. Further, a ring-shaped pole piece 23 is fixed to the upper end of the yoke 7 so as to form an annular gap 22 between the pole piece 23 and the permanent magnet 21 .

A drive coil 24 is arranged in the gap 22 so as to be able to reciprocate in the axial direction of the casing 6, that is, in the vertical direction. This drive coil 24 is wound around a support member 25, and the support member 25 is fixed to a cylindrical piston 26 that is concentric with the axis of the casing 6.
Therefore, drive coil 24 and piston 26 are substantially integrated. This piston 26 is
The closing member 8 is inserted into the casing 6.
The cylinder part 27 is integrally provided with the cylinder part 27. Further, a resonance spring 28 is interposed between the pole piece 23 and the support member 25, and a resonance spring 29 is also interposed between the support member 25 and the closing member 8.
Therefore, the piston 26 is a pair of upper and lower resonant springs 2.
8,29. Further, a suction valve 30 is provided at the lower end of the piston 26.

A cap-shaped lid 32 is fixed to the lower part of the closing member 8 with bolts 31 . A piston 2 is disposed between the cap-shaped lid 32 and the closing member 8 within the cylinder portion 27.
A discharge valve chamber 34 located further below the cylinder chamber 33 defined below 6 is defined, and a high pressure chamber 35 is defined by closing the hole provided in the closing member 8 with a cap-shaped lid 32. will be accomplished. Further, a communication passage 36 that communicates between the discharge valve chamber 34 and the high pressure chamber 35 is bored in the cap-shaped lid 32 .

The discharge valve chamber 34 includes a discharge valve 38 that can be seated on a valve seat 37 provided on the closing member 8 at the lower end of the cylinder chamber 33, and a pressure spring 39 that urges the discharge valve 38 in a direction to seat on the valve seat 37. is stored.

A suction pipe 41 that communicates between the bottom of the container 2 and the low pressure chamber 40 inside the compressor body 3 is attached to the closing member 8, and a discharge pipe 42 that communicates with the high pressure chamber 35 is attached. This discharge pipe 42
passes through the upper end of the container 2 and is drawn out to the outside, and is connected to, for example, a refrigerator condenser (not shown). Further, a connecting member 44 having a connecting terminal 43 is attached to the upper part of the container 2, and an AC power source (not shown) is connected to the outer end of the connecting terminal 43. Further, the inner end of the connection terminal 43 is connected to the drive coil 24 via a lead wire 45 and a resonance spring 28. Further, the drive coil 24 has a resonant spring 29,
It is connected via a casing 6 and springs 4, 5 to a container 2, which can be connected to the alternating current power source. Therefore, it is possible to cause an alternating current to flow through the drive coil 24.

Further, an introduction pipe (not shown) for introducing a fluid to be pressurized into the container 2 is connected to the upper part of the container 2 .

Next, the operation of this embodiment will be described. By passing an alternating current through the drive coil 24, the piston 26 vibrates up and down together with the drive coil 24 depending on the polarity of the alternating current. Moreover, the vertical vibration of the piston 26 is caused by a pair of upper and lower resonant springs 2.
8,29. Due to the amplified vertical vibration of the piston 26, the suction valve 30 and the discharge valve 38 perform a pumping action, and the fluid such as the refrigerant introduced into the container 2 flows into the low pressure chamber 40 via the suction pipe 41, and the piston 26 , the discharge valve chamber 34 via the suction valve 30, the cylinder chamber 33 and the discharge valve 38.
The liquid flows into the refrigerator, and is further discharged to a refrigerator condenser or the like via the communication passage 36, high pressure chamber 35, and discharge pipe 42.

In such a vibrating compressor, a plurality of mounting plates 9 are attached to the inner surface of the lower end of the yoke 7, and by screwing the screw members 10 into the screw holes 16 of the mounting plates 9 and tightening them, the closing member 8 is attached to the lower end of the yoke 7. Therefore, it is not necessary to provide a screw hole in the lower end surface of the yoke 7 as in the conventional case. Therefore, there is no need to provide a thick portion having an undercut shape on the inner surface of the lower end of the yoke 7, and the processing of the inner surface of the lower end of the yoke 7 is facilitated.

By eliminating the need for the thick portion, the yoke 7
Moreover, there is no need to insert an object between the closing members 8, and the number of parts can be reduced. Moreover, since the inclusion is no longer necessary, the threaded member 1
The length under the neck of screw member 1 can be shortened.
There is no need to increase the strength of 0, and costs can be reduced. In particular, as in this embodiment, the screw member 1
The head 10a of 0 is inserted into the locking step 2 in the middle of the insertion hole 17
0, the length of the screw member 10 below the neck can be further shortened.

Further, since there is no inclusion between the yoke 7 and the closing member 8, the alignment of the yoke 7 and the closing member 8 can be easily performed without particularly increasing processing accuracy.

FIG. 4 shows a second embodiment of the present invention, and is a front view of the yoke 7 viewed from below.
In this second embodiment, an arcuate mounting plate 46 spanning approximately 360 degrees is fitted into the mounting groove 15 of the yoke 7 and mounted. A plurality of screw holes 47 (three in the figure) are bored in the mounting plate 46 at intervals in the circumferential direction.

The outer diameter of the mounting plate 46 is set to be slightly larger than the diameter of the mounting groove 15, and the mounting plate 46 is inserted into the yoke 7 in a reduced diameter state with its circumferential ends brought close to each other. , is fitted into the mounting groove 15 by releasing its diameter-reduced state.
Furthermore, in the fitted state, the mounting plate 46 exerts a resilient force outward in the radial direction, and its position within the mounting groove 15 is determined.

In this second embodiment as well, the closing member 8 is fixed to the lower end of the yoke 7 by screwing the screw member 10 (see FIG. 1) into the screw hole 47, and the same effect as in the first embodiment can be obtained. can play.

FIG. 5 shows a third embodiment of the present invention, in which the mounting plate 48 has a curved portion 49 that is curved to correspond to the inner surface of the large-diameter fitting hole 12 in the yoke 7;
It has a support plate part 50 and is formed in a substantially L-shape, and a screw hole 51 is bored in the support plate part 50. This mounting plate 48 is fixed to the yoke 7 by spot welding or projection welding with its curved portion 49 in contact with the inner surface of the large diameter fitting hole 12, and is spaced apart in the circumferential direction of the yoke 7. A plurality of them (three in the figure) are arranged at intervals.

This embodiment eliminates the need for the mounting groove 15 in the first and second embodiments, making processing easier.

FIG. 6 shows a fourth embodiment of the present invention, in which a mounting plate 52 has a ring-shaped support plate portion 54 at one end of a cylindrical portion 53 having an outer peripheral surface corresponding to the inner surface of the large-diameter fitting hole portion 12. are integrally provided, and a plurality of screw holes 55 are bored in the support plate portion 54 at intervals in the circumferential direction.

The mounting plate 52 is fixed to the yoke 7 by spot welding or projection welding with the outer peripheral surface of the cylindrical portion 53 in contact with the inner surface of the large diameter fitting hole 12.

This fourth embodiment can also provide the same effects as the third embodiment.

C Effect of the invention As described above, according to the invention, a mounting plate having a screw hole along the axial direction of the casing is attached to the inner surface of the other end of the yoke, and the closing member is a screw member passing through the closing member. Since it is fixed to the other end of the yoke, there is no need to provide a screw hole on the other end surface of the yoke, and there is no need to perform complicated machining to form an undercut shape. At the same time, it is no longer necessary to have an inclusion between the yoke and the closing member, which reduces the number of parts, eliminates the need to increase machining accuracy for alignment, and It is not necessary to make the screw member high in strength by shortening the length under the neck.

[Brief explanation of the drawing]

Figures 1 to 3 show the first embodiment of the present invention, with Figure 1 being an overall vertical sectional view, Figure 2 being an exploded perspective view of the lower end of the yoke and the mounting plate, and Figure 3 being an exploded perspective view of the yoke. FIG. 4 is a perspective view showing a state in which a mounting plate is attached to the yoke, FIG. 4 shows a second embodiment of the present invention, and an end view of the yoke seen from below, and FIG. 5 shows a third embodiment of the present invention. A perspective view of the lower end of the yoke viewed from below.
FIG. 6 shows a fourth embodiment of the present invention, and is a perspective view seen from below with the lower end of the yoke partially cut away. 1... Vibratory compressor, 6... Casing, 7...
Yoke, 8...Closing member, 9, 46, 48, 52
...Mounting plate, 10...Screw member, 16, 47, 5
1,55...Screw hole, 21...Permanent magnet, 22...
...Gap, 23...Pole piece, 24...Drive coil, 26...Piston, 27...Cylinder section.

Claims (1)

[Scope of utility model registration request] A permanent magnet and a pole piece that forms an annular gap between the permanent magnet and the permanent magnet are fixedly disposed in a casing formed of a cylindrical yoke with one end closed and the other end closed with a closing member. , a driving coil energized by alternating electric power is disposed in the gap so as to be movable in the axial direction of the casing, and a piston that is substantially integral with the coil slides into a cylinder portion provided in the closing member. In the compressor, a mounting plate having a threaded hole along the axial direction of the casing is attached to the inner surface of the other end of the yoke, and the closing member is a threaded member that passes through the blocking member and is screwed into the screw hole. A vibratory compressor characterized in that it is fixed to the other end of a yoke.