KR100661359B1 - Structure for hinge connecting rotor and swash plate of a variabie displacement swash plate type cpmpressor - Google Patents

Abstract

In the swash plate hinge structure of the variable displacement swash plate type compressor according to the present invention, one side of the first hinge arm 21 formed in the first hinge arm 21 of the rotor 6 is formed of the first hinge pin hole 21a and the swash plate 7 of the long hole type. The first hinge arm 21 of the rotor by the hinge pins 23 installed through the circular second and third hinge pin holes 22a and 22'a formed in the second hinge arms 22 and 22 '. ) And the second hinge arms 22 and 22 'of the swash plate are connected to allow the inclination angle of the swash plate to be adjusted. The second hinge pin hole 22a of the second hinge arm has a locking portion 24 which is in contact with the front end portion of the hinge pin inserted therein, and the third hinge pin hole 22'a has a rear end portion of the hinge pin. And a snap ring 25 in contact with the groove is mounted in the groove 25a formed along the inner diameter of the third hinge pin hole. Accordingly, the hinge pin is positioned in the hinge pin hole in such a state that the front end thereof is supported by the engaging portion formed in the second hinge pin hole, and the rear end thereof is caught by the snap ring mounted in the third hinge pin hole. Therefore, the hinge pin is not released by vibration or the like during the operation of the compressor. In addition, according to the present invention, since the machining tolerance of the hinge pin and the hinge pin hole may have a large, the processing of the hinge pin and the hinge pin hole is easy, and there is an effect that the hinge pin is easily inserted into the hinge pin hole.

Compressor, swash plate compressor, variable displacement swash plate compressor, hinge pin, hinge structure

Description

STRUCTURE FOR HINGE CONNECTING ROTOR AND SWASH PLATE OF A VARIABIE DISPLACEMENT SWASH PLATE TYPE CPMPRESSOR}

1 is a cross-sectional view showing an example of a variable displacement swash plate compressor used in an automotive air conditioner,

Figure 2 is a perspective view showing a swash plate hinge structure and thereby the rotor and the swash plate connected according to the present invention,

3 is a side view of FIG. 2, and

Figure 4 is a detailed cross-sectional view shown for explaining the hinge pin departure prevention structure that is the main portion of the present invention.

Explanation of symbols on the main parts of the drawings

5; drive shaft 6; rotor

7; Saphan 21; first hinge arm

21a; first hinge pin hole 22; second hinge arm

22a, 22'a; Second and third hinge pin holes 23; Hinge pins

24; latch 25; snap ring

25a; groove

The present invention relates to a variable displacement swash plate type compressor for varying the discharge capacity by adjusting the inclination angle of the swash plate. It relates to a swash plate hinge structure that is connected to the hinge pin if possible.

In the swash plate type compressor, which is widely used as a compressor of an automobile air conditioner, a disk-shaped swash plate installed to be inclined to a rotating drive shaft by receiving engine power rotates by a drive shaft, and the shoe is driven along the circumference of the swash plate by rotation of the swash plate. The plurality of pistons installed therebetween are linearly reciprocated in the plurality of cylinder bores formed in the cylinder block, thereby inducing / compressing and discharging the refrigerant gas.

The variable displacement swash plate compressor is configured such that the inclination angle of the swash plate installed on the drive shaft is variable according to the heat load, and thus the amount of refrigerant discharge is adjusted while the reciprocating feed amount of the piston is changed.

The variable displacement swash plate type compressor as shown in FIG. 1 has a cylinder block (1) having a plurality of cylinder bores (1a) arranged in parallel in the longitudinal direction on the inner circumferential surface of the cylinder block (1), and The front housing 2 is hermetically coupled to the front, and the rear housing 3 is hermetically coupled to the rear of the cylinder block 1 under the valve plate 3a.                         

In the crank chamber 4 defined by the front housing 2, a drive shaft 5 is rotatably installed at the center of the front housing 2, and the drive shaft 5 is provided with a rotor 6 and a swash plate 7. ) Is installed. The rotor 6 is rotated together with the drive shaft 5, and the swash plate 7 is connected to the rotor 6 by a hinge structure 8, while one end thereof is inclined at an angle to the drive shaft 5. In addition, the inclination angle is varied while rotating together with the rotor 6 and slidingly moving along the drive shaft 5 in the axial direction.

On the outer circumference of the swash plate 7, a plurality of pistons 9 reciprocating in each cylinder bore 1a of the cylinder block 1 in accordance with the rotation of the swash plate 7 are fixed under the opening of the shoe 10. Installed at intervals.

In the rear housing 3, the suction chamber 11 and the discharge chamber 12 are formed, respectively, and the valve plate 3a is formed with the suction port 13 and the discharge port 14, respectively.

In addition, the valve plate 3a is provided with a suction lead 15 and a discharge lead 16 which open and close the inlet 13 and the outlet 14 while operating by a pressure change caused by the reciprocating movement of the piston 9. It is.

On the other hand, the spring 17 interposed in the drive shaft 5 between the rotor 6 and the swash plate 7 allows the swash plate 7 to return to its initial position by elastically supporting the swash plate 7 with respect to the rotor 6. The control valve 18 operatively communicates the discharge chamber 12 and the crank chamber 4 to vary the differential pressure between the refrigerant suction pressure in the cylinder bore 1a and the gas pressure in the crank chamber 4. It serves to adjust the inclination angle of the swash plate (7).

In the variable displacement swash plate type compressor, the piston 9 slidably mounted to the swash plate 7 by the swash plate 7 that swings back and forth while rotating together with the rotation of the drive shaft 5 is reciprocated. As a result, the refrigerant is compressed, and the inclination angle of the swash plate 7 is adjusted in response to the pressure difference between the pressure in the crank chamber 4 and the suction pressure in the cylinder bore 1a, thereby varying the compressor discharge capacity.

Here, the hinge part (hinge structure 8) which is the connection part of the rotor 6 and the swash plate 7 becomes a reference | standard support point of the swash plate 7 inclination-angle adjustment. The swash plate hinge structure includes a first hinge pin hole provided in the first hinge arm 21 of the rotor 6 and a second hinge arm 22 provided in the pair of second hinge arms 22 formed at a predetermined interval. And a third hinge pin hole inserted into the hinge pin 23 to connect the third hinge pin hole. At this time, the first hinge pin hole is formed in the form of a long hole with one side open, the second and third hinge pin holes are formed in a circular shape. The hinge pin 23 is forcibly pressed into the second and third hinge pin holes so as not to be removed during operation of the compressor, and a first hinge provided at the hinge arm 21 of the rotor 6 at a central portion of the hinge pin 23. The pinhole is accommodated and installed to move along this hinge pinhole. Accordingly, the inclination angle of the swash plate 7 is adjusted by using the hinge pin 23 as a reference point. At the maximum inclination angle of the swash plate, the hinge pin 23 is the uppermost part of the first hinge pin hole formed in the hinge arm of the rotor 6. The hinge pin 23 is positioned at the bottom of the first hinge pin hole at the minimum inclination angle of the swash plate.

However, in the swash plate hinge structure of the conventional variable displacement swash plate type compressor as described above, in order to prevent the removal of the hinge pin 23 when the compressor is operated, the second and third hinges provided with the hinge pins 23 on the hinge arms of the swash plate. Forcing the pinhole into the pinhole, however, the hinge pin is often removed from the hinge pinhole by repeated acceleration, deceleration, or clutch cycling.

In addition, since the conventional swash plate hinge structure is a forced press-fitting method as described above, it is difficult to assemble the hinge pins, and the processing tolerances of the swash plate hinges are very small in order to maintain the pressing force between the hinge pins and the second and third hinge pin holes. There is also a problem that it is very disadvantageous in terms of productivity because it must be taken low.

The present invention has been made in view of the above-mentioned problems, and the swash plate hinge of the variable displacement swash plate type compressor can prevent the various problems caused by removing the hinge pin during operation of the compressor because the hinge pin is easy to assemble and is not easily removed. The purpose is to provide a structure.

Another object of the present invention is to provide a swash plate hinge structure of a variable displacement swash plate type compressor that can greatly increase the machining tolerances of the hinge pin and the hinge pin hole, thereby improving productivity.

The swash plate hinge structure of the variable displacement swash plate type compressor according to the present invention for achieving the above object, the first hinge pin hole of the long hole form formed in the first hinge arm of the rotor and the second hinge arm of the swash plate The first hinge arm of the rotor and the second hinge arm of the swash plate are connected to each other so that the inclination angle of the swash plate can be adjusted by the hinge pins installed through the formed circular second and third hinge pin holes. The second hinge pin hole of the second hinge arm has a catch portion contacting the front end portion of the hinge pin inserted therein, and the third hinge pin hole has a snap ring contacting the rear end portion of the hinge pin, the inner diameter of the third hinge pin hole. It is mounted on the groove formed along the side. Accordingly, the hinge pin is located in the hinge pin hole in a state where the front end thereof is supported by the engaging portion formed in the second hinge pin hole, and the rear end thereof is caught by the snap ring attached to the third hinge pin hole. The movement is constrained, so that the hinge pin is not separated by vibration or the like during operation of the compressor.

In addition, according to the present invention, since the machining tolerances of the hinge pins and the hinge pin holes may have a large tolerance, not only the processing of the hinge pins and the hinge pin holes is easy, but also the insertion of the hinge pins into the hinge pin holes may be easily performed. The effect of improving a sex can also be aimed at.

Hereinafter, with reference to the accompanying drawings will be described in detail the swash plate support structure of the variable displacement swash plate compressor according to the present invention.

Figure 2 is a perspective view showing a swash plate hinge structure and a state in which the rotor and the swash plate is connected according to the present invention, Figure 3 is a side view of Figure 2, and Figure 4 illustrates a hinge pin departure prevention structure that is the main part of the present invention It is a detailed sectional drawing shown to make. For reference, in describing the embodiments of the present invention, the same reference numerals refer to the same parts and configurations.

As shown, the swash plate support structure of the variable displacement swash plate type compressor according to the present invention is a first hinge of a long hole shape, the lower side of which is coupled to the drive shaft 5 and the rotor 6 rotating together with the drive shaft 5. A first hinge arm 21 having a pinhole 21a is provided, and the second and third hinge pin holes 22a are respectively formed in the swash plate 7 mounted to the drive shaft 5 so as to be movable in the axial direction thereof. A pair of second hinge arms 22, 22 'having a 22'a are disposed at regular intervals, and the first hinge arm 21 is a pair of second hinge arms 22 ( 22 ') are connected to each other by hinge pins 23 installed through their hinge pin holes 21a, 22a, 22'a in a state arranged between the two.

The hinge pin 23 has both end portions thereof fitted into the second and third hinge pin holes 22a and 22'a of the second hinge arms 22 and 22 ', and the hinge pin 23 is provided. The central portion of the first hinge arm 21 is accommodated in the first hinge pin hole (21a) of the long hole shape to be moved along the hinge pin hole. Therefore, it is possible to adjust the inclination angle of the swash plate 7 with the hinge pin 23 as a reference point.

Meanwhile, according to the present invention, any one of the second and third hinge pin holes 22a and 22'a formed in the pair of second hinge arms 22 and 22 ', that is, the second hinge pin hole, is used. 22a, the engaging portion 24 for contacting the front end of the hinge pin 23 inserted therein to limit the movement of the hinge pin in the forward direction (the hinge pin insertion direction, left direction in Figure 4) Is formed. The third hinge pin hole 22'a is provided with a groove for seating a snap ring 25 mounted to contact the rear end of the hinge pin 23 inserted therein to limit the movement of the hinge pin in the backward direction. 25a is formed. Accordingly, the hinge pin 23 inserted into the hinge pin holes 22a and 22'a has its front end caught by the engaging portion 24 of the second hinge pin hole 22a, and the rear end thereof is the third hinge pin hole 22 '. Since the hinge pin 23 is supported in a state caught in the snap ring 25 mounted on the end side of a), the hinge pin 23 is constrained in the hinge pin hole. Therefore, as in the related art, even when the hinge pin is not forcedly coupled to the hinge pin hole, the hinge pin is not detached from the hinge pin hole, and as a preventive structure, the hinge pin is prevented from being removed. No deviation from this position occurs at all.

Here, the engaging portion 24 may be formed by processing a hole having a diameter smaller than the hinge pin hole at the end of the second hinge pin hole 22a to have a predetermined step between the hole and the hinge pin hole. However, the structure of the locking portion 24 is not necessarily limited to the illustrated example, and can be changed to other forms. For example, instead of processing a hole having a diameter smaller than that of the hinge pin hole, it may be possible to arrange the step by forming a plurality of ribs, and although there is a difficulty in processing, it is possible to completely close one end of the second hinge pin hole. One way would be.

The swash plate hinge structure according to the present invention thus constitutes the first hinge arm 21 of the rotor 6 between the pair of second hinge arms 22 and 22 ′ formed on the swash plate 7. The hinge pin holes 21a, 22a 'and 22a are matched, and then the hinge pin 23 is joined from the third hinge pin hole 22a to the front end of the hinge pin 24 by the second hinge pin hole 22'a. Insert it until it stops. Then, the snap ring 25 is mounted on the groove 25a formed at the end side of the third hinge pin hole 22a.

Compressor is variable capacity operation while adjusting the inclination angle of the swash plate with the swash plate hinge structure according to the present invention assembled as described above as a reference point.

At this time, in the course of the operation of the compressor as described above, a continuous and repetitive vibration is generated in the hinge pin due to rapid acceleration, deceleration and the occurrence of the clutch cycle ring, the hinge pin 23 is caught, that is, the second hinge pin Since it is restrained from moving in the forward and backward directions by the snap ring attached to the engaging portion of the hole and the third hinge pin hole, the phenomenon that the hinge pin is released for the same reason does not occur.

According to the present invention as described above, since the front and rear ends of the hinge pin inserted into the hinge pin hole are supported by the engaging portion formed in the second hinge pin hole and the snap ring attached to the third hinge pin hole, that is, Otherwise, since the hinge pin is supported and restrained by the locking structure in the hinge pin hole, the hinge pin is not released by vibration or the like during the operation of the compressor. Therefore, the reliability of the compressor can be improved.

In addition, according to the present invention, since the hinge pin is inserted into the hinge pin hole in a state constrained by the locking structure, the machining tolerances of the hinge pin and the hinge pin hole can be made large, unlike the conventional forced press fitting method. Therefore, not only the processing of the hinge pins and the hinge pin holes is easy, but also the insertion of the hinge pins into the hinge pin holes can be easily achieved.

Although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the scope of the present invention as claimed in the following claims. Of course, any person skilled in the art can make various modifications, and such modifications fall within the scope of the claims.

Claims (1)

The first of the rotor is formed by hinge pins installed via first and second hinge pin holes of a long hole shape having one side formed in the first hinge arm of the rotor and circular second and third hinge pin holes formed in the second hinge arm of the swash plate. In the swash plate hinge structure of the variable displacement swash plate type compressor, in which the hinge arm and the second hinge arm of the swash plate are connected to be capable of adjusting the inclination angle of the swash plate, A second hinge pin hole of the second hinge arm is formed with a locking portion that contacts the front end portion of the hinge pin inserted therein and restricts the movement of the hinge pin in a forward direction (insertion direction), and a hinge pin in the third hinge pin hole. A snap ring is mounted on the groove formed along the inner diameter of the third hinge pin hole to contact the rear end of the hinge pin to limit the movement of the hinge pin in the reverse direction. Thereby, the swash plate hinge structure of the variable displacement swash plate type compressor, which can prevent the removal of the hinge pin.

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