JP2590090B2 - Compressor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly to a compressor having an oil cover as an oil supply device.

[Prior Art] A conventional compressor will be described with reference to FIG. FIG. 4 is a longitudinal sectional view of a conventional horizontal compressor.

In the figure, reference numeral 1 denotes a case that also serves as an oil reservoir. In the case 1, the electric element 2 and the compression element 3 are housed side by side in the horizontal direction. The electric motor 2 includes a stator 4 and a rotor 5, and the rotor 5 is fitted with a shaft 6 having a crank 6a and having a shaft hole 6b having a hollow end at one end. The compression element 3 has a spring seat hole 7a which is not drilled at the lower end of the cylinder 7, and a spring 9 which is engaged with a spring seat 8 inserted into the spring seat hole 7a.

Side plates 10a and 10b are provided on both sides of the cylinder 7, respectively. Side plates far from the motor in the side plates on both sides
A concave portion is formed in 10b, and a discharge silencer chamber 18 for refrigerant gas is formed by a flat discharge cover 19 covering the concave portion. The side plate 10b and the discharge cover 19 constituting the discharge silencer chamber 18 and the side plate 10a and the cylinder 7 are
Has been concluded. Reference numeral 12 denotes a roller which is fitted on the crank 6a and rotates eccentrically along the inner wall of the cylinder 7. Numeral 13 denotes a vane which has a tip abutting on an eccentrically rotating roller 12 and the other end of which reciprocates in a groove 7b of the cylinder 7 while being pushed by a spring 9 provided at the lower end of the cylinder 7. A pump chamber 14 is formed surrounded by the back surface of the vane 13, the groove 7b of the cylinder 7, the side plates 10a and 10b, and the spring seat 8.

Next, the oil supply structure will be described. A tapered suction port 15 for sucking the lubricating oil in the case 1 into the pump chamber 14 is formed in the side plate 10a. The side plate 10b has a tapered discharge port that can discharge lubricating oil from the pump chamber 14 to the oil supply pipe 17.
16 are provided. A U-shaped oil feed pipe 17 is attached to the discharge cover 19 so that the shaft hole 6b of the shaft 6 communicates with the discharge port 16. The oil feed pipe 17 is projection-welded to the discharge cover 19. Due to the reciprocating motion of the vane 13, the lubricating oil in the case 1 flows into the pump chamber 14 via the suction port 15, and is supplied to the shaft hole 6b at one end of the shaft 6 through the discharge port 16 and the oil feed pipe 17, and The required lubrication part can be supplied with oil from the shaft hole 6b through the branch hole 6c.

Incidentally, as one related to this kind of compressor, there is, for example, Japanese Utility Model Laid-Open No. 56-20092.

[Problems to be solved by the invention]

In the above-mentioned prior art, spatter (metal powder) is generated when the oil feed pipe is projection-welded to the discharge cover, and when the oil feed pipe and the discharge cover are incorporated into the case while the spatter is generated, the spatter is generated by the sliding portion of the compression element. May invade. In the event of intrusion, locking of the compression element could occur.

An object of the present invention is to provide a compressor in which generation of spatter is prevented.

[Means for Solving the Problems] The object of the present invention is to always contact a cylinder, a side plate provided on both sides of the cylinder and forming a pump chamber together with the cylinder, a roller eccentrically rotating in the cylinder, and a roller eccentrically rotating. A compression element composed of a vane that reciprocates, an electric element arranged side by side in the horizontal direction of the compression element, a case for storing both elements and storing lubricating oil therein, and connecting the two elements. A shaft having a shaft hole through which the lubricating oil flows while driving the compression element by rotation of the electric element, and supplying the lubricating oil stored in the case to the shaft hole of the shaft by the reciprocating motion of the vane. A lubricating means configured to lubricate a sliding portion of the compression element, and a concave portion formed in a side plate at a position remote from the electric motor. In a horizontal compressor having a flat discharge cover constituting a discharge silencer chamber for a medium gas, the oil supply means includes an oil hole for passing lubricating oil from the reciprocating vane formed in the discharge cover. An oil cover formed by press working an oil groove through which the oil hole for passing lubricating oil from the vane passes through the shaft hole of the shaft, and an oil groove serving as a passage for the lubricating oil through the oil hole between the oil cover and the discharge cover. The oil cover is attached to the compression element by caulking, and is achieved by a compressor that forms an oil supply path for supplying lubricating oil stored in the case to the shaft hole of the shaft. Is done.

[Action]

Conventionally, the oil supply path is formed by caulking a flat discharge cover, and an oil cover formed by press working an oil groove serving as a passage for lubricating oil between the discharge cover and the discharge cover. There is no need to perform projection welding, which was necessary for mounting the oil supply pipe of the technology, and there is no generation of spatter, so that spatter does not enter the sliding portion. Further, since the oil cover having the oil groove formed by press working can be attached to the flat discharge cover to form the oil supply path, the structure is simple.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3.

FIG. 1 is a longitudinal sectional view of the present invention, FIG. 2 is a plan view of a main part of FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. The fourth
The same reference numerals as those in the drawings denote the same or equivalent components, and a description thereof will be omitted.

In FIG. 1, an electric element 2 including a stator 4 and a rotor 5 and a shaft 6 having a crank 6 a directly connected to the rotor 5 and a crank 6 a are fitted in a case 1 also serving as an oil sump. A roller 12 eccentrically rotating, a vane 13 having a tip abutting against the roller 12 and reciprocating in a groove 7a of the cylinder 7 while being pressed by a spring 9; A side plate 10a having a port 15 formed therein, a side plate 10b provided on the other side of the cylinder 7 having a tapered oil discharge port 16 formed therein, and a flat discharge cover for covering a discharge silencer chamber 18 formed in the side plate 10b. It consists of 19. In the drawing, an oil hole 19a communicating with the discharge port 16 and an oil hole 19b communicating with the shaft hole 6a at one end of the shaft 6 are formed in the discharge cover 19. These oil holes 19a and 19b are configured to communicate with each other by an oil cover 20. When the compressor constructed as described above operates, the pump chamber 14 surrounded by the side plates 10a and 10b and the spring seat 8 and the vane 13 reciprocating in the groove 7b of the cylinder 7 causes the lubricating oil in the case 1 to move. Lubricating oil flows into the pump chamber 14 from the suction port 15, and is supplied to the shaft hole 6b of the shaft 6 through the discharge port 16, the oil hole 19a, the oil cover 20, and the oil hole 19b, and is further required through the branch hole 6c from the shaft hole 6b. Can be lubricated.

Next, the structures of the discharge cover 19 and the oil cover 20 will be described in detail. The discharge cover 19 is a flat plate formed from a relatively thick steel plate. One surface of the discharge cover 19 is the side plate.
The other surface serves as a mounting surface for the oil cover 20. The discharge cover 19 has a bolt 11 tightening hole.
Several 19c and oil holes 19a and 19b are formed.
In the vicinity of the oil holes 19a and 19b, a projection 19d is provided so as to project toward the mounting surface side of the oil cover 20. This projection 19d
Is half cut so that the height of the oil cover 20 is larger than the thickness of the oil cover 20.

On the other hand, the oil cover 20 is formed by press-molding a thin steel plate to integrally form an oil groove 20a serving as a passage for lubricating oil and a flange portion 20b abutting on the discharge cover 19. The projection 1 of the discharge cover 19 is provided on the flange portion 20b.
A caulking hole 20c into which 9d fits is formed.

When assembling the discharge cover 19 and the oil cover 20 having the above structure, the oil cover 20 is fixed by inserting the caulking projection 19d into the caulking hole 20c provided on the flange portion 20b, and caulking the projection 19d.

According to the present embodiment, the oil supply path has a simple structure in which an oil cover-like component in which an inexpensive thin plate is integrally formed with an oil groove and a flange portion around the oil groove by a simple press working is attached to a flat discharge cover. Can be formed.

In addition, projection welding can be considered as a simple method of attaching the discharge cover and the oil cover. Spatters (metal powder) generated during projection welding may be incorporated into the compressor and lock the compression element. In the mounting by caulking according to the present invention, spatter does not occur, and factors such as locking of the compression element are eliminated and reliability is improved.

〔The invention's effect〕

According to the present invention, the oil feed path is formed by caulking a flat discharge cover, and an oil cover formed by press working between the discharge cover and an oil groove serving as a passage for lubricating oil. Therefore, there is no need to perform projection welding, which was necessary for mounting the oil supply pipe of the prior art, there is no generation of spatter, and therefore, the compression element locks without spatter entering the sliding part. Can be prevented. Further, since the oil feed path can be formed by attaching the oil cover having the oil groove formed by pressing to the flat discharge cover, the structure is simple and the production is easy.

[Brief description of the drawings]

1 is a longitudinal sectional view of the compressor of the present invention, FIG. 2 is a plan view of a main part of FIG. 1, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. It is a longitudinal cross-sectional view. 1 ... case, 6 ... shaft, 7 ... cylinder, 9 ...
... Spring, 10a, 10b ... Side plate, 12 ... Roller, 13 ... Vane, 14 ... Pump chamber, 15 ... Suction port, 16 ... Discharge port, 17 ... Oil pipe, 19 ... Discharge cover, 20 ... Oil cover.

Claims (1)

(57) [Claims] The present invention comprises a cylinder, a side plate disposed on both sides of the cylinder to form a pump chamber together with the cylinder, a roller eccentrically rotating in the cylinder, and a vane reciprocating in constant contact with the eccentric rotating roller. Compression element, an electric element arranged side by side in the horizontal direction of the compression element, a case for housing both elements and storing lubricating oil therein, and a compression element by connecting the two elements and rotating the electric element. And a shaft having a shaft hole through which the lubricating oil flows, and supplying the lubricating oil stored in the case to the shaft hole of the shaft by the reciprocating motion of the vane to the sliding portion of the compression element. An oil supply means configured to supply oil, and a concave portion is formed in a side plate at a position remote from the electric motor, and a refrigerant gas discharge silencer chamber is formed to cover the concave portion. A horizontal compressor provided with a flat discharge cover having a flat shape, wherein the oil supply means is provided with an oil hole through which lubricating oil from the reciprocating vane formed in the discharge cover passes and a shaft hole of the shaft from the vane. And an oil cover formed by press working an oil groove which serves as a passage for lubricating oil by communicating between the oil holes between the discharge cover and the oil hole. A compressor, which is attached to a compression element by caulking to form an oil supply path for supplying lubricating oil stored in the case to a shaft hole of the shaft.