KR20040079078A - Swash plate, compressor having the same and assembling method thereof - Google Patents

Abstract

PURPOSE: An inclined plate for a compressor, the compressor with the inclined plate, and an assembling method thereof are provided to improve the lubrication characteristic of a sliding part and to expand the durable life span of the compressor by sliding a shoe in the same direction of processed patterns formed on both surfaces of the rotary inclined plate. CONSTITUTION: An inclined plate(110) for a compressor obliquely combines with a driving shaft(20) and has both lateral sides(111,112) slidingly joined with a piston by a shoe(30) to reciprocate the piston. Both lateral sides are processed in the opposite direction by a superfinishing method. The compressor is composed of the driving shaft; the inclined plate obliquely joined to the driving shaft; a housing for forming a cylinder bore to be parallel with the driving shaft at the position eccentric from the driving shaft; the piston reciprocated by rotation of the inclined plate; and the shoe slidingly combined between the lateral sides of the inclined plate and the piston. The rotational direction of the driving shaft and the processing direction of the inclined plate are opposite to each other in a view from one direction.

Description

Swash plate for compressor, compressor with same and assembly method thereof {Swash plate, compressor having the same and assembling method}

The present invention relates to a swash plate type compressor, and more particularly, to a swash plate which improves lubrication characteristics of a sliding part in which a shoe slides, a compressor having the same, and a method of assembling the same.

Typically, a compressor used in a vehicle air conditioner pumps a heat exchange medium by the action of sucking the vaporized heat exchange medium in the evaporator, compressing the sucked heat exchange medium, and discharging the compressed heat exchange medium. . Such compressors include various types such as swash plate, scroll type, rotary type, wobble plate type and crank type according to the compression type and the driving type.

Figure 1 shows a cross-sectional view of an example of a swash plate compressor of these various types of compressors.

Referring to the drawings, a cylinder block 50 is installed in the front housing 41 and the rear housing 42 which are respectively divided. The piston 60 is fitted into the cylinder bore 51 formed in the cylinder block 50. The swash plate 10 is inclinedly coupled to the drive shaft 20 received power from an internal combustion engine (not shown). The front and rear sides 11 and 12 and the piston 60 of the swash plate 10 are slidably coupled via the shoe 30.

In the general swash plate type compressor configured as described above, when the drive shaft 20 rotates, the swash plate 10 is interlocked to rotate so that the piston 60 linearly reciprocates, and the cylinder bore 51 rotates the swash plate 10. The suction and compression stroke is made according to the angle.

The rotational force of the drive shaft 20 is transmitted to the piston 60 by the shoes 30 interposed between the front and rear sides 11, 12 and the piston 60 of the swash plate 10, respectively. At this time, the shoe 30 slides the front and rear side surfaces 11 and 12 of the swash plate 10. The sliding portion of the shoe 30 and the swash plate 10 is broken by the sliding and the oil film is broken. Easy to be Furthermore, if the frictional contact is maintained in a state where the oil film is broken, a sintering phenomenon occurs in which the contact portion is fused to shorten the life of the compressor. Therefore, in order to lower the coefficient of friction during sliding of the swash plate 10 and the shoe 30, the front and rear side surfaces 11 and 12 of the swash plate 10 manages the precision of the processing, for this purpose, The front and rear sides 11 and 12 of 10 essentially perform the polishing process. After such a polishing process, the processing pattern remains on the front and rear side surfaces 11 and 12 of the swash plate 10.

By the way, conventionally, the swash plate 10 is coupled to the drive shaft 20 without considering the direction of the processing pattern formed on the front and rear side surfaces 11 and 12 of the swash plate 10 and the sliding direction of the shoe 30. . If the shoe 30 slides in the opposite direction (hereinafter referred to as "reverse direction") of the fringes formed on the front and rear sides 11 and 12 of the swash plate 10, it is often used with the swash plate 10. When the sliding portion of the shoe 30 is badly worn by the oil film breakage occurs, if severe, there is a problem that the sintering occurs to shorten the durability life of the compressor.

The present invention has been made to solve the above problems, and an object thereof is to provide a swash plate for a compressor in which the processing direction is kept constant in order to improve the lubrication characteristics of the front and rear sides of the swash plate and the shoe.

In addition, it is another object to provide a compressor that improves the lubrication characteristics of the front and rear side of the swash plate and the shoe by sliding the shoe in the same direction as the direction of the processing pattern formed on the front and rear sides of the swash plate.

Furthermore, another object is to provide a method of assembling the compressor which improves the lubricating properties of the shoe and the front and rear sides of the swash plate.

1 is a cross-sectional view showing an example of a general swash plate compressor;

Figure 2 is a perspective view showing the structure of a swash plate according to an embodiment of the present invention,

FIG. 3 is a side view seen from the “X” direction of FIG. 2;

FIG. 4 is a side view seen from the direction “Y” of FIG. 2.

<Brief description of symbols for the main parts of the drawings>

20 Drive shaft 30 Shoe

41,42.Front and rear housing 50 ... cylinder block

51 cylinder cylinder 60 piston

110 swash plate 111,112.front and rear side

In order to achieve the above object, the swash plate for a compressor according to an aspect of the present invention is coupled to the drive shaft inclined, and both sides are slidably coupled to the piston via a shoe to reciprocate the piston, and both sides thereof are opposite to each other. Characterized in that processed.

Further, according to another aspect of the invention, the drive shaft; A swash plate coupled to the driving shaft inclinedly; A housing defining a cylinder bore substantially parallel to the drive shaft at a position eccentric from the drive shaft; A piston reciprocating by the rotation of the swash plate; And a shoe that is slidably coupled between both side surfaces of the swash plate and the piston, wherein the rotation direction of the drive shaft and the processing direction of the swash plate are opposite to each other when viewed in one direction. to provide.

Furthermore, according to still another aspect of the present invention, there is provided a method for preparing a swash plate having two sides processed in opposite directions; And coupling the swash plate to the drive shaft such that the rotational direction of the drive shaft and the processing direction of the swash plate are opposite when viewed from one direction.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing an example of a general swash plate compressor, Figure 2 is a perspective view showing the structure of a swash plate according to an embodiment of the present invention.

Referring to the drawings, the compressor includes a cylinder block 50 coupled to be sealed between the front housing 41, the rear housing 42, and the front and rear housings 41 and 42.

The cylinder block 50 is formed with a plurality of cylinder bores 51 spaced apart at predetermined intervals in the circumferential direction about the drive shaft 20. The piston 60 is slidably accommodated in the cylinder bore 51. The swash plate 110 that is rotated in conjunction with the rotation is inclined to the drive shaft 20. The swash plate 110 is connected to the piston 60 in a state in which a pair of hemispherical shoes 30 are interposed therebetween. The swash plate 110 is slidably coupled to the front and rear side 111, 112 of the piston via the shoe. The piston 60 linearly reciprocates in the cylinder bore 51 in accordance with the rotation of the swash plate 110. The shoe 30 serves as a motion converting means for converting the rotational motion of the swash plate 110 into the reciprocating motion of each piston 60.

FIG. 3 is a side view seen from the “X” direction of FIG. 2, and FIG. 4 is a side view seen from the “Y” direction of FIG. 2.

According to one feature of the invention, as shown in Figures 3 and 4, the front and rear side 111, 112 of the swash plate 110 is processed in opposite directions to each other. The front and rear sides 111 and 112 of the c) are preferably super finished.

In addition, according to another feature of the present invention, the rotational direction of the drive shaft 20 and the machining direction of the swash plate 110 to be opposite to each other when viewed in one direction. 3 and 4 exemplarily illustrate a rotation direction of the drive shaft 20 and a machining direction of the swash plate 110 according to the embodiment of the present invention.

As shown, if the direction of rotation of the drive shaft 20 is counterclockwise when viewed from the front and clockwise when viewed from the rear, the front side 111 of the swash plate 110 is formed with a processing pattern in a clockwise direction (see FIG. 3). ), The back side 112 of the swash plate 110 should be formed with a processing pattern in the counterclockwise direction (see Fig. 4).

In order to assemble the compressor having the above configuration, the swash plate 110 is prepared in which the front and rear side surfaces 111 and 112 are processed in opposite directions. Next, the swash plate 110 should be coupled to the drive shaft 20 so that the rotational direction of the drive shaft 20 and the machining direction of the swash plate 110 are opposite when viewed from one direction.

According to the swash plate 110 and the compressor having the same according to the embodiment of the present invention, the shoe 30 has the same direction as the direction of the processed pattern formed on the front and rear side surfaces 111 and 112 of the swash plate 110 (hereinafter, Sliding in the forward and rear sides 111 and 112 of the swash plate 110, the lubrication characteristics of the sliding portion thereof are improved.

The features of the present invention described as described above can be applied not only to a fixed swash plate type compressor that cannot vary the pumping capacity but also to a variable capacity swash plate type compressor that can vary its discharge capacity according to a cooling load.

As described above, according to the swash plate, the compressor including the same, and an assembly method thereof, the lubrication characteristics of the sliding portion are improved by sliding the shoe in the same direction, that is, in the forward direction, of the processed pattern formed on both sides of the rotating swash plate. This also extends the endurance life of the compressor.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary and will be understood by those skilled in the art that various modifications and variations can be made therefrom. Therefore, the true scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (5)

It is coupled to the drive shaft inclined, both sides are slidably coupled to the piston via the shoe to reciprocate the piston, both sides of the compressor swash plate, characterized in that processed in the opposite direction. The method of claim 1, Compressor swash plate, characterized in that both sides are processed by super finishing. A drive shaft; A swash plate coupled to the driving shaft inclinedly; A housing defining a cylinder bore substantially parallel to the drive shaft at a position eccentric from the drive shaft; A piston reciprocating by the rotation of the swash plate; And a shoe which is slidably coupled between both side surfaces of the swash plate and the piston, respectively. And a rotational direction of the drive shaft and a machining direction of the swash plate are opposite to each other when viewed in one direction. The method of claim 3, And both sides of the swash plate are super finished. Preparing a swash plate on which both sides are processed in opposite directions; And And assembling the swash plate to the drive shaft such that the rotational direction of the drive shaft and the machining direction of the swash plate are opposite when viewed from one direction.