JPS632634Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a discharge valve, and more particularly to a discharge valve that is inserted between a cylinder block having a cylinder chamber and a cover body having a bottomed hole concentric with the cylinder chamber and fixed to the cylinder block. Regarding discharge valves.

First of all, to explain a vibrating compressor in which this type of discharge valve is conventionally used in FIG. The piston 4 vibrates up and down together with the drive coil 3 depending on the polarity of the current, and the vertical vibration of the piston 4 is amplified by the upper and lower resonance springs 5 and 6. Due to the amplified vertical vibration of the piston 4, the suction valve 7
Then, the discharge valve 8 performs a pumping action, and fluid such as refrigerant filling the container 9 flows into the low pressure chamber 11 via the suction pipe 10, and the hollow part of the piston 4,
It is discharged to a condenser of a refrigerator or the like through the suction valve 7, cylinder chamber 12, discharge valve 8, communication hole 13, high pressure chamber 14, and discharge pipe 15.

In such a vibratory compressor, the conventional discharge valve 8 has a valve seat 17 provided on the cylinder block 16.
and a disc-shaped valve body 18 that can come into contact with the valve seat 17.
A cylindrical guide portion 21 that is fitted into a bottomed hole 20 formed in a cover body 19 fixed to the cylinder block 16 and concentrically with the cylinder chamber 12 to guide movement of the valve body 18; A disk-shaped support part 22 that comes into contact with the bottom, and a coiled valve spring 23 that is interposed between the valve body 18 and the support part 22 within the guide part 21.
It consists of

When assembling this discharge valve 8, the valve body 18 and the valve spring 2 are attached to the valve seat 17 of the cylinder block 16.
3 and the support part 22 are placed thereon, the cover body 19 with the guide part 21 fitted into the bottomed hole 20 is placed thereon, and then tightened with bolts 24. However, in such assembly work, the valve body 18, valve spring 23, and support part 22 must be inserted into the guide part 21 in the bottomed hole 20 without shifting their positions, and a certain degree of skill is required. Therefore, the work efficiency is also poor. Furthermore, a step 25 is provided at the bottom of the bottomed hole 20 in order to restrict the radial movement of the valve spring 23, and it takes extra time to process this step 25.

It is an object of the present invention to provide a discharge valve that solves these conventional technical problems, improves assembly work efficiency, and has a simple bottomed hole structure to shorten processing time.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, in FIG. 16, and a discharge valve 27 according to the present invention is inserted between the cylinder block 16 and the cover body 9.

This discharge valve 27 has a cylindrical portion 2 that protrudes concentrically into the bottomed hole 26 and protrudes from the cylinder block 16.
a valve seat 17 provided on the end face of the valve 8; a disc-shaped valve body 18 that can be seated on the valve seat 17; a holder 29 that is fitted into the bottomed hole 26 and holds the valve body 18; and a coiled valve spring 23 that biases the valve body 18 toward the valve seat 17.

In FIGS. 3, 4 and 5, the valve body 1
8. The holder 29 and the valve spring 23 are integrated into a unit. That is, the holder 29 is formed by integrating a guide portion 30 that guides the axial movement of the valve body 18 and a disk-shaped support portion 31 that supports the end of the valve spring 23, and controls the opening and closing operation of the valve body 18. In order to prevent wear of the bottomed hole 26 due to
material).

A through hole 32 is bored in the center of the support portion 31 . The guide portion 30 is composed of a plurality of (four in this embodiment) holding pieces 33 that extend in the axial direction from the peripheral edge of the support portion 31 at intervals in the circumferential direction, and each free end of these holding pieces 33 has a A radially inwardly bent pawl 34 is provided, respectively. The diameter of the virtual circle connecting the tips of each claw 34 is selected to such an extent that the cylindrical portion 28 (see FIG. 2) of the cylinder block 16 can penetrate into the holder 29.

On the peripheral edge of the support portion 31, a plurality of (four in this embodiment) regulating pieces 35 are bent between the respective holding pieces 33 and are inclined radially outward in the extending direction of the holding pieces 33. These regulating pieces 35 constitute a regulating section 36. The diameter of an imaginary circle connecting the bent portions of these regulating pieces 35 from the supporting portion 31 is selected to the extent that the valve spring 23 can be fitted therein, and the end of the valve spring 23 is located within the regulating portion 36 and supported. By being supported by the portion 31, movement in the radial direction is prevented and held at a fixed position.

The valve spring 23 is housed in the holder 29 with one end of the valve spring 23 in contact with the support portion 31 within the restriction portion 36 . The valve body 18 is inserted into the holder 29 by slightly bending each holding piece 33 in a direction away from each other, and is brought into contact with the other end of the valve spring 23 .
When the holding pieces 33 are released from each other in this state, the holding pieces 33 return to their original states by their own elastic force, and each claw 34 engages with the valve body 18.
Therefore, the valve body 18 will not fall off from the boulder 29.

Since the regulating part 36 of the valve spring 23 is provided in the holder 29, the bottomed hole 26 of the cover body 19 does not need to be provided with the stepped part 25 shown in FIG. Bye.

Next, to explain the operation of this embodiment, when assembling the discharge valve 27, as shown in FIG.
3 and prepare it in advance as a unit.
The unit part is inserted into the bottomed hole 26 of the cover body 19. Next, the cylindrical portion 28 of the cylinder block 16 enters into the holder 29, and the valve seat 17 is brought into contact with the valve body 1.
The cover body 19 is fixed to the cylinder block 16 so as to be in contact with the cylinder block 8. In this way, the assembly work of the discharge valve 27 is completed together with the assembly of the cover body 19 and the cylinder block 16, and the assembly work can be performed extremely easily.

FIG. 6 shows a second embodiment of the present invention, in which the support part 3 is moved with the regulating piece 38 facing inward in the radial direction.
The regulating portion 39 may be formed by bending from the first portion. In this case, each restriction piece 38 enters into the end of the valve spring 23 and restricts the movement of the valve spring 23 in the radial direction.

FIG. 7 shows a third embodiment of the present invention. In this embodiment, a plurality of restricting portions 40 are inclined radially outward from the peripheral edge of the support portion 31 toward one side in the axial direction. Guide portions 41 are provided at intervals and extend in the axial direction from the outer ends of these regulating portions 40 .

FIG. 8 shows a fourth embodiment of the present invention, in which a circularly raised restricting portion 42 is protruded from the center of the support portion 31, and this restricting portion 42 is connected to the valve spring 23.
is inserted into the end of the

As described above, according to the present invention, the support part and the guide part are made of an elastic metal material and are integrated as a holder, and the guide part is spaced apart from the peripheral edge of the support part in the circumferential direction. and a plurality of holding pieces extending in the axial direction, each holding piece having a free end bent radially inward to allow the valve seat to enter into the holder and engaging the valve body. Since the claws are provided respectively, it is possible to accommodate the valve body and valve spring in the holder to form a unit. Therefore, the unit can be inserted into the bottomed hole of the cover body and the cover body and cylinder block can be assembled. By fixing the two, the discharge valve can be assembled very easily.
As a result, assembly work efficiency improves, which is useful for automating production lines. Furthermore, since the support part is provided with a regulating part that regulates the radial movement of the valve spring, processing such as providing a step in the bottomed hole of the cover body is not necessary, and processing time is shortened.

[Brief explanation of the drawing]

Fig. 1 is an overall vertical sectional view of a vibrating compressor using a conventional discharge valve, Figs. 2 to 5 show an embodiment of the present invention, and Fig. 2 is a longitudinal sectional view of main parts; Third
The figure is a perspective view showing a state in which the valve spring and valve body are housed in the holder, Figure 4 is a plan view of the holder, Figure 5 is a sectional view taken along the line V-V in Figure 4, Figures 6 and 7. FIG. 8 and FIG. 8 are longitudinal cross-sectional views of main parts showing the second, third and fourth embodiments, respectively. 12... Cylinder chamber, 16... Cylinder block, 17... Valve seat, 18... Valve body, 19... Cover body, 23... Valve spring, 26... Bottomed hole, 27...
...discharge valve, 29 ... holder, 30, 41 ... guide section, 31 ... support section, 34 ... claw, 36, 39,
40, 42...Regulation Department.

Claims (1)

[Scope of utility model registration request] inserted between a cylinder block having a cylinder chamber and a cover body having a bottomed hole concentric with the cylinder chamber and fixed to the cylinder block,
a valve seat that protrudes concentrically into the bottomed hole and is provided on the cylinder block; a disk-shaped support portion that abuts the bottom of the bottomed hole; a disk-shaped valve body that can be seated on the valve seat; A discharge valve comprising a guide part that is fitted into a bottomed hole and guides movement of the valve body, and a coiled valve spring that is interposed between the valve body and the support part within the guide part, the support part and the guide part. is made of an elastic metal material and is integrated as a holder, and the guide part is composed of a plurality of holding pieces extending in the axial direction at intervals in the circumferential direction from the peripheral edge of the support part, and each holding piece The free ends of the pieces are each provided with a pawl that is bent radially inward to allow the valve seat to enter the holder and engages with the valve body,
A discharge valve characterized in that the support portion is provided with a restriction portion that restricts radial movement of an end portion of the valve spring.