JPH0311431Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field The present invention relates to a vibrating compressor suitable for, for example, a portable refrigerator and a vehicle-mounted refrigerator. In a vibrating compressor configured to be elastically supported by an elastic member such as a spring, protrusions are provided at both ends of the compressor body to prevent undesired rocking of the compressor body. The present invention relates to a shock absorbing device that elastically supports parts.

(2) Prior art Figures 4 and 5 show a conventional vibratory compressor of this type. Figure 4 is a cross-sectional view of the entire vibratory compressor, and Figure 5 is a cross-sectional view of the main parts of the shock absorber. As shown in the figure, the vibratory compressor 1 includes a cylinder 2a and a case cap 2b that closes both open ends of the cylinder 2a.
A compressor main body 3 is elastically supported by support springs 4 and 5 within an outer casing 2 constituted by 2c. In addition, the inner casing 6
is a pot-shaped end yoke 7 at one end of the cylindrical portion 7a.
b, and the end yoke 7b is closed by, for example, welding the end yoke 7b and the cylindrical portion 7a so that the fitting portion 7d is fitted to the inner circumferential surface of the cylindrical portion 7a as shown in the figure. The yoke 7 is constructed by fixing the yoke 7 with the yoke 7 or the like.
Further, the cylinder body 8 is formed in the shape of a thick disk and is fitted into the yoke 7, and below the yoke 7 is formed in the shape of a ring-shaped disk with a part cut out. A mounting plate 9 is attached to the cylindrical portion 7a, and the cylinder body 8 is fixed to the yoke 7 by screwing a plurality of screw members 10 passing through the cylinder body 8 onto the mounting plate 9.

A magnet 11 having an arcuate cross section is fixed inside the inner casing 6 so as to come into contact with the inner peripheral surface of the yoke 7 and the stepped portion 7c, and an annular gap is formed between the end yoke 7b and the magnet 11. 14
A pole piece 13 for forming a pole piece is fixed by a screw member 15 with a magnet 12 interposed therebetween. A drive coil 16 is disposed in the gap 14 so as to be able to reciprocate in the axial direction of the inner casing 6. The drive coil 16 is wound around a support member 7, and the support member 17 is integrally connected to a cylindrical piston 18 concentric with the axis of the inner casing 6. The piston 18 is slidably connected to a cylinder portion 19 provided integrally with the cylinder body 8 . Further, a resonance spring 20 is interposed between the pole piece 13 and the support member 17, and a resonance spring 21 is also interposed between the support member 17 and the cylinder body 8. Therefore, the piston 18 is held between the pair of upper and lower resonance springs 20 and 21. A suction valve 22 is provided at the tip of the piston 18. Further, a cap-shaped head cover 23 is fixed to the lower part of the cylinder body 8 by a screw member (not shown). Between the cap-shaped head cover 23 and the cylinder body 8, there is a cylinder portion 1.
A discharge valve chamber 25 is provided below the cylinder chamber 24 located below the piston 18 in the cylinder body 9, and a high pressure chamber 26 and a low pressure chamber are closed by blocking the hole bored in the cylinder body 8 with a cap-shaped head cover 23. 27 are provided. Further, a communication passage 28 that communicates the discharge valve chamber 25 and the high pressure chamber 26 is formed in the cap-shaped head cover 23 . In addition, the high pressure chamber 2
6 penetrates the case cap 2c, for example,
A discharge pipe 29 is provided which is connected to an evaporator of an on-vehicle refrigerator (not shown). Here, the refrigerant discharged to the evaporator (not shown) passes through a condenser (not shown) to the case cap 2.
The suction pipe 30a passes through the cap-shaped head cover 23 and communicates with the low pressure chamber 27, and the suction pipe 30c communicates between the low pressure chamber 27 and the inside of the inner casing 6. The piston 18 is introduced into the inner casing 6 and sucked into the cylinder chamber 24 by the suction valve 22.
When the pressure of the compressed refrigerant increases, the pressure of the refrigerant itself is biased by the pressure spring 33, which biases the valve seat 31 in the direction of seating, and opens the discharge valve 32, which closes the cylinder chamber 24, downward, increasing the high pressure. The refrigerant flows into the high pressure chamber 26 via the discharge valve chamber 25 and the communication passage 28, and as described above, the refrigerant flows into the discharge pipe 29.
It is discharged from.

In addition, case cap 2c has terminal 34.
Connecting members 34b, 3 that connect the terminal 34a and the resonance spring 21 are provided with a protruding portion a.
4c is provided. In addition, the drive coil 16
and the resonance spring 21 are connected by a terminal 35a, and the drive coil 16 and the resonance spring 20 are connected by a terminal 35b.
connected by. Therefore, the alternating power from the inverter (not shown) is supplied to the terminal 34.
a, via the connection members 34b and 34c, the resonance spring 21, the drive coil 16, and the resonance spring 20, the pole piece 13, the screw member 15, the end yoke 7b, the support spring 4, the case cap 2b, and the cylindrical part 2a. This allows the water to flow to the outer casing 2 consisting of the case cap 2c and to the earth terminal 38.

In the vibratory compressor described above, the compressor main body 3 is elastically supported by upper and lower support springs 4 and 5, and is configured to be sandwiched within the outer casing 2. Therefore, since the compressor body 3 is elastically supported by the support springs 4 and 5, it may swing undesirably due to an external impact, or if the vibrating compressor is placed horizontally. If this happens, the support state will become unstable. As a countermeasure for this, as shown in an enlarged view in FIG. ) Projections 7b' are provided at both ends of the compressor main body 3.
23', and a shock absorber configured by housing vibration-proof rubbers 37a, 36a in cup-shaped holders 37b, 36b, the protrusions 7b', 23' are provided, thereby reducing the vibration of the compressor body 3. Consideration has been given to preventing desired rocking and the like.

However, in the above countermeasure, the protrusions 23' and 7b' of the compressor main body are
36a, the anti-vibration rubber 37
a, 36a and the protrusions 2 at both ends of the compressor main body 3
There was an undesirable problem of generation of contact noise with 3' and 7b'.

(3) Problems to be solved by the invention The present invention has been made in view of the above circumstances, and is designed to provide a shock absorber that does not generate contact noise even when the protrusion of the compressor body slides on the shock absorber. Our objective is to provide a vibratory compressor with the following features.

B. Structure of the invention (1) Means for solving the problem A magnetic circuit is formed by a yoke that also serves as the inner casing and a magnet, and a drive coil is freely reciprocated in the axial direction in the annular gap of the magnetic circuit. A piston integrally connected to the drive coil is slidably fitted into a cylinder constituting the compressor main body, and has protrusions at both ends of the inner casing to elastically In a vibratory compressor, a shock absorber for receiving the protrusion is disposed at a position corresponding to the protrusion in an outer casing that supports the protrusion, and the shock absorber has an inner surface on which a side surface of the protrusion slides. The non-lubricant bearing is fitted into vibration-proof rubber and housed in cup-shaped holders fixed to case caps at both ends of the outer casing.

(2) Effect Therefore, according to the present invention, it is possible to prevent the occurrence of contact noise caused by sliding between the shock absorber that receives the protrusions at both ends of the inner casing and the protrusions at both ends of the inner casing. .

(3) Examples Examples of the present invention will be described below.

FIG. 1 is a sectional view of a main part of a first embodiment of a shock absorbing device according to the present invention, and the same reference numerals as shown in FIGS. Therefore, the explanation thereof will be omitted and only the differences will be explained.The first embodiment of the present invention has a ring-shaped vibration isolating rubber 5 having a stepped portion 51A on the outer periphery.
1. After fitting a so-called non-lubricant bearing 52 made of a ring-shaped material made of wear-resistant material with a small coefficient of sliding friction, such as Teflon or nylon, into the vibration isolating rubber 51, for example, the case cap 2C is fitted. The anti-vibration rubber 5 is inserted into a cup-shaped holder 37b fixed by welding or the like, and the non-lubricant bearing 52 is fitted by, for example, drawing the open end 37bA of the cup-shaped holder 37b.
1 is housed in the cup-shaped holder 37b.

FIG. 2 is a sectional view of a main part of a second embodiment of a shock absorber according to the present invention.
2A is characterized in that it prevents the non-lubricant bearing 62 from coming off when it is fitted into the vibration isolating rubber 61, and the other configurations are the same as those of the first embodiment, so a description thereof will be omitted.

Moreover, FIG. 3 is a sectional view of the main part of the third embodiment of the shock absorber according to the present invention. A protrusion was provided on the non-lubricant bearing to prevent it from coming off, but in this embodiment, a protrusion 71A was provided on the anti-vibration rubber 71 as shown in the figure, and the other configurations were the same as in the first embodiment. Therefore, I will omit it.

C. Effects of the invention As explained above, the present invention not only makes it possible to prevent undesired rocking of the compressor body, but also provides a shock absorber provided to prevent the undesired rocking. This can prevent contact noise from occurring when the protrusions at both ends of the compressor body slide.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of a shock absorber according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of main parts of a shock absorber according to a second embodiment of the present invention, and FIG. FIG. 4 is a cross-sectional view of a main part of a shock absorbing device according to an example, FIG. 4 is a cross-sectional view of the entire conventional vibration compressor, and FIG. 5 is a cross-sectional view of a main part of the shock absorbing device of the conventional vibration compressor shown in FIG. The symbols used in the drawings are 1... vibrating compressor, 2...
...Outer casing, 3...Compressor body, 4...Support spring, 5...Support spring,
6...Inner casing, 7...Yoke, 7b...
End yoke, 8... Cylinder body, 11... Magnet, 12... Magnet, 13... Pole piece, 14... Annular gap, 16... Drive coil, 18... Piston, 19... Cylinder part, 2
0...Resonance spring, 21...Resonance spring, 36...Buffer device, 37...Buffer device, 37a...Vibration isolating rubber, 37b...Cup-shaped holder, 7b'...Protrusion, 23'... Projection, 51
... Anti-vibration rubber, 52 ... Lubrication-free bearing, 61 ...
...Vibration-proof rubber, 62...Lubricant-free bearing, 71...
Anti-vibration rubber, 72...A non-lubricant bearing.

Claims (1)

[Scope of utility model registration request] A magnetic circuit is formed by a yoke that also serves as the inner casing and a magnet, and a drive coil is disposed in an annular gap of the magnetic circuit so as to be able to reciprocate in the axial direction, and a piston is integrally connected to the drive coil. is slidably fitted into a cylinder constituting the compressor main body, has protrusions at both ends of the inner casing, and has corresponding positions of the protrusions in the outer casing that elastically supports the inner casing. A vibration compressor is provided with a shock absorber that receives the protrusion, and the shock absorber has a non-lubricated bearing on the inner surface on which the side surface of the protrusion slides, and the non-lubricated bearing is made of anti-vibration rubber. A vibratory compressor, characterized in that the vibratory compressor is housed in a cup-shaped holder that is fitted into the outer casing and fixed to case caps at both ends of the outer casing.