KR100834768B1 - Mechanism spring of a swash plate type compressor and the swash plate type compressor - Google Patents

Abstract

A swash plate type compressor and a mechanism spring thereof are provided to reduce the hysteresis of variable mechanism by receiving compressive force and tensile force with a plate-shaped spring according to the inclination angle of a swash plate, thereby improving the motion of the swash plate. A mechanism spring of a swash plate type compressor includes a flat part(161) formed with a fitting groove(161a) at a side to be fitted in a driving shaft(140) and two extension pieces(161b) at both sides of the fitting groove. Two curved supporting parts(162) have supporting pieces(162a) folded convexly towards the flat part to face the extension pieces, and curvedly folded holding pieces(162b) extended from the supporting pieces to be away from the flat part. Two curved connection parts(163) have curved connection pieces(163a) for connecting the extension pieces to the supporting pieces.

Description

MECHANISM SPRING OF A SWASH PLATE TYPE COMPRESSOR AND THE SWASH PLATE TYPE COMPRESSOR

1 is a longitudinal sectional view showing a general structure of a conventional swash plate compressor.

Fig. 2 is a longitudinal sectional view showing the structure of a swash plate compressor including a mechanism spring according to the first embodiment of the present invention.

Figure 3a is a side view showing the coupling structure of the drive shaft, the swash plate and the spring at the minimum inclination angle of the swash plate in FIG.

3B is a side view illustrating a coupling structure of a drive shaft, a swash plate, and a spring at the maximum inclination angle of the swash plate in FIG. 2.

4 is an assembled perspective view of the vicinity of the mechanism spring in FIG. 2.

FIG. 5 is a perspective view of the mechanism spring in FIG. 4. FIG.

Fig. 6 is a side view of the mechanism spring of Fig. 5, (a) shows the minimum inclination angle of the swash plate, and (b) shows the maximum inclination angle.

7 is a perspective view of a mechanism spring according to Embodiment 2 of the present invention.

8 is a perspective view showing the connection structure of the mechanism spring, the drive shaft and the swash plate according to the second embodiment of the present invention.

9 is a side view of FIG. 8.

10 is a graph showing the concept of the compressive force and the tensile force of the mechanism spring according to the present invention, respectively.

※ Explanation of Major Components

110: cylinder block

110a: cylinder bore

120: front housing

130: rear housing

140: drive shaft

150: swash plate

160: mechanism spring

161: flat part

162: curved support

162a: support piece

162b: Jam piece

162c: hinge rod

163: curved connection

167: load transfer link

200: piston

201: shoe

300: suction / discharge valve device

400: Bearing

1000: Swash Plate Compressor

The present invention relates to a mechanism spring of a swash plate type compressor and its swash plate type type compressor. In particular, the present invention improves the initial operability (initial compression process) of the compressor which is driven at the minimum inclination angle when the air conditioner is turned on. The present invention relates to a swash plate-type compressor mechanism and a swash plate-type compressor for buffering fluctuations of the swash plate inclination angle to a sharp minimum inclination angle during operation, while exerting a tensile force to smooth the movement of the swash plate.

As is well known, in the general swash plate type compressor, which is widely used as a compressor of a vehicle air conditioner, a disc-shaped swash plate is installed on a drive shaft to which engine power is transmitted so that the inclination angle is variable, and a shoe (shoe) is formed around the swash plate. A plurality of pistons are freely installed through the through. The piston sucks, compresses and discharges the refrigerant gas by linearly reciprocating the inside of the plurality of cylinder bores formed in the cylinder block.

In recent years, the inclination angle of the swash plate changes according to the change of the heat load to control the feed amount of the piston to achieve precise motion control, and to reduce the sudden torque fluctuation of the engine by the compressor, thereby improving the riding comfort of the vehicle. Many compressors have been proposed.

1 shows a variable displacement swash plate type compressor disclosed in Korean Patent Application No. 1996-0021953, which is briefly described as follows.

The conventional variable displacement swash plate compressor 10, the cylinder block 11 having a plurality of cylinder bores (11a) formed in parallel in the longitudinal direction on the inner peripheral surface, and is hermetically coupled to the front of the cylinder block (11) The front housing 12 and the rear housing 13 is hermetically coupled to the rear of the cylinder block 11 via a valve plate 13a.

In addition, a swash plate chamber 14 is formed inside the front housing 12, and one end of the driving shaft 15 is rotatably supported at the center of the front housing 12, while the other end of the driving shaft 15 is rotatably supported. Is passed through the swash plate chamber 14 is supported via the bearing (11c) to the central shaft hole (11b) of the cylinder block (11).

In addition, the drive shaft 15 is provided with a lug plate 16, which is spaced apart by a predetermined distance, and a swash plate 17 provided through the drive shaft 15 so that the inclination angle is variable, and the lug plate 16 is provided. The spring 27 for elastically supporting the swash plate 17 with respect to the lug plate 16 is interposed between the swash plate 17 and the swash plate 17. The minimum inclination angle of the swash plate 17 can be maintained by the spring 27.

If the swash plate 17 does not maintain the minimum inclination angle for compressing the refrigerant, even if the drive shaft 15 rotates at the beginning of the operation of the compressor, since the refrigerant is not compressed at all, the initial operation of the compressor becomes unstable and takes a lot of initial load. .

In the lug plate 16, a pair of power transmission protrusions 16a, each of which has a hinge hole 16b linearly perforated, is formed to protrude integrally at one end of the surface to rotate together with the drive shaft 15.

In addition, the swash plate 17 has a hinge pin 18 fixed to one surface of the swash plate 17 formed to be inclined at a predetermined angle to the driving shaft 15 and formed on the power transmission protrusion 16a of the lug plate 16. It is inserted into 16b, and it rotates with the lug plate 16, and the inclination angle is changed.

In addition, the outer circumferential surface of the swash plate 17 is slidably fitted to the piston 19 provided in each cylinder bore 11a via the shoe 20.

Accordingly, as the swash plate 17 rotates in an inclined state, the pistons 19 inserted through the shoe 20 on the outer circumferential surface thereof reciprocate in each cylinder bore 11a of the cylinder block 11. .

In addition, a suction chamber 21 and a discharge chamber 22 are respectively formed in the rear housing 13, and each cylinder bore is provided in the valve plate 13a interposed between the rear housing 13 and the cylinder block 11. The suction port 23 and the discharge port 24 are respectively formed in the position corresponding to 11a.

Suction valves for opening and closing the inlet port 23 and the outlet port 24 in each of the inlet port 23 and the outlet port 24 formed in the valve plate 13a by the pressure change according to the reciprocating motion of the piston 19. 25 and a discharge valve 26 are provided.

In addition, the rear housing 13 has suction with the swash plate chamber 14 so as to adjust the inclination angle of the swash plate 17 by varying the pressure difference between the refrigerant suction pressure in the cylinder bore 11a and the pressure in the swash plate chamber 14. The control valve 28 which passes through the seal 21 is provided.

In the conventional displacement variable swash plate type compressor 10 configured as described above, the inclination angle of the swash plate 17 is adjusted in response to the pressure difference between the pressure in the swash plate chamber 14 and the suction pressure in the cylinder bore 11a. The stroke distance of the piston 19 connected to the swash plate 17 is changed by the change of the inclination angle of the), and the discharge capacity of the compressor is varied.

As described above, the conventional swash plate type compressor has a structure in which the minimum inclination angle is maintained by the spring 17 in the form of a spring.

In the conventional swash plate type compressor, since the minimum inclination angle is maintained by a simple spring, the initial operability of the compressor driven at the minimum inclination angle when the air conditioner is operated is somewhat insufficient. Occasionally, fluctuations in the minimum angle of inclination were caused.

In particular, since the spring 27 is interposed between the lug plate 16 and the swash plate 17, the assembly work with the drive shaft 15 is cumbersome and the structure itself is complicated.

In addition, conventionally, when the lug plate 16 and the swash plate 17 are rotated by the drive shaft 15, the spring 27 can slide with respect to the lug plate 16 and the swash plate 17 to generate noise during operation. There were many cases.

The present invention has been made to solve the above-described problems, the object of the present invention is to improve the initial operability of the compressor to drive the minimum inclination angle when operating the air conditioner, the swash plate inclination angle in the compression process when not in operation during air conditioning It is to provide a mechanism spring and its swash plate compressor of the swash plate compressor having a function of buffering the fluctuations to a sharp minimum slope of.

In addition, an object of the present invention is the mechanism spring and swash plate of the swash plate type compressor which can smooth the movement of the swash plate by reducing the hysteresis of the variable mechanism by exerting the tensile force when the swash plate variable with the compressive force at the minimum inclination angle of the swash plate To provide a compressor.

It is also an object of the present invention to provide a mechanism spring and a swash plate compressor of the swash plate compressor, which is easy to assemble and simple in structure.

Another object of the present invention is to provide a mechanism spring and a swash plate compressor of the swash plate type compressor, which are firmly fixed to the drive shaft and can eliminate friction noise due to sliding contact during operation.

In order to achieve the above object, the mechanism spring fitted to the drive shaft of the swash plate compressor according to the present invention, the compression force is applied to the support of the spring by the swash plate at the minimum inclination angle of the swash plate, the swash plate is inclined beyond the minimum inclination angle When the tension is applied to the support portion of the spring is characterized in that it is installed.

Here, the mechanism spring,

One side has a fitting groove is formed to be fitted to the drive shaft, the flat portion having two extension pieces with the fitting groove therebetween;

When viewed from the side, two support pieces which are disposed opposite the two extension pieces of the flat portion and the intermediate portion is bent convexly toward the flat portion, extend in a direction away from the support portion with respect to the flat portion, and are bent in a curved shape. Curved support portion consisting of the formed engaging piece; And

It characterized in that it comprises a curved connection consisting of two connecting pieces of the curved connecting the one end of the two extension pieces of the flat portion and one end of the two support pieces of the curved support.

In this case, the swash plate compressor according to the present invention,

A cylinder block having a plurality of cylinder bores, a housing formed with a swash plate chamber, and a suction chamber and a discharge chamber communicating with the cylinder bore and a suction / discharge valve, and rotatably supported by the cylinder block and the housing. The drive shaft and the swash plate is installed so that the inclination angle is changed to the drive shaft, the connecting link connecting the drive shaft and the swash plate so as to rotate relative, the swash plate and the sliding movement is coupled and the reciprocating movement to the cylinder bore As configured to include a piston that is possibly accommodated,

The mechanism spring is fixed to the drive shaft, the engaging piece of the mechanism spring is characterized in that coupled to the connecting portion between the swash plate and the connecting link.

On the other hand, the mechanism spring,

One side has a fitting groove is formed to be fitted to the drive shaft, the flat portion formed with two extension pieces with the fitting groove therebetween;

When viewed from the side, it is disposed opposite the two extension pieces of the flat portion, the front end is composed of two support pieces each of which is formed a hinge rod outward, curved support portion formed convexly bent toward the flat portion; And

It characterized in that it comprises a curved connection consisting of two connecting pieces of the curved connecting the one end of the two extension pieces of the flat portion and one end of the two support pieces of the curved support.

In this case, the swash plate compressor according to the present invention,

A cylinder block having a plurality of cylinder bores, a housing formed with a swash plate chamber, and a suction chamber and a discharge chamber communicating with the cylinder bore and a suction / discharge valve, and rotatably supported by the cylinder block and the housing. The drive shaft and the swash plate is installed so that the inclination angle is changed to the drive shaft, the connecting link connecting the drive shaft and the swash plate so as to rotate relative, the swash plate and the sliding movement is coupled and the reciprocating movement to the cylinder bore In the swash plate compressor comprising a piston that is possibly accommodated,

The mechanism spring is fixed to the drive shaft, characterized in that the load transfer link between the hinge rod and the connecting link is hinged to enable movement.

Here, the two inner side pieces forming the fitting groove of the flat portion is characterized in that arranged in parallel to each other.

In addition, when viewed from the side, the shaft center of the drive shaft is characterized in that passes through the center of gravity of the mechanism spring.

In addition, the load transfer link is characterized in that connected to the hinge pin and the hinge pin of the link.

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

First, Figure 2 shows the structure of a swash plate compressor including a mechanism spring according to this embodiment.

As shown, the reciprocating compressor 1000 according to the present embodiment includes a housing 100, a cylinder block 110 having a plurality of cylinder bores 110a, and rotation of the cylinder block 110. The cylinder bore 110a by sliding with the drive shaft 140 supported by the drive shaft 140, the swash plate 150 connected to the drive shaft 140 so that the inclination angle can be changed while being rotated, and the swash plate 150. The housing through the piston 200 accommodated in the reciprocating movement, the suction / discharge valve device 300 installed to face the bottom of the piston 200, and the suction / discharge valve device 300. It comprises a suction chamber 131 and the discharge chamber 132 formed in the (100).

The housing 100 is composed of a front housing 120 and a rear housing 130 with the cylinder block 110 interposed therebetween.

In addition, a suction chamber 131 and a discharge chamber 132 are formed in the rear housing 130, and a suction port 331 communicating the cylinder bore 110a and the suction chamber 131 to the valve plate 330. , And a discharge port 332 which communicates the cylinder bore 110a and the discharge chamber 132 with each other.

In addition, the suction port 331 and the discharge port 332 formed in the valve plate 330, suction for opening and closing the suction port 331 and the discharge port 332 by the pressure change according to the reciprocating motion of the piston 180. A valve and a discharge valve are respectively provided.

The cylinder block 110 has eight cylinder bores 110a, and the refrigerant introduced from the suction chamber 131 is continuously compressed by the piston 200 reciprocating through the cylinder bore 110a. do. Of course, the number of cylinder bores 110a can vary.

The drive shaft 140 is rotatably supported by the front housing 120 and the cylinder block 110 via a bearing 400.

In addition, the swash plate 150 is slidably coupled to the piston 200 via the shoe 201.

Furthermore, connecting projections 155 are formed before and after the swash plate 150, respectively, and a connecting link 600 is interposed between the connecting projection 155 and the driving shaft 140, and the hinge pins 610 are connected to each other. Are connected by Therefore, the connection link 600 and the connection protrusion 155, the connection link 600 and the drive shaft 140 can be hinged with respect to each other.

On the other hand, the drive shaft 140 is provided with a mechanism spring 160 for maintaining the minimum inclination angle of the swash plate 150.

Hereinafter, an embodiment of the mechanism spring 160 will be described with reference to the drawings.

Salsiye 1

3 to 6 show the configuration of the mechanism spring 160 according to the present embodiment.

Although the mechanism spring 160 is bent at various curvatures, it is preferable that the mechanism spring 160 be in a plate shape having a predetermined thickness when deployed. Of course, each part may have a different thickness.

In addition, as shown in the figure, an elongated groove is formed inside the plate so as to be fitted around the drive shaft 140 when deployed.

Referring to the structure of the mechanism spring 160 on the basis of the final completed structure in more detail as follows.

5 and 6, the mechanism spring 160 according to the present invention is a flat portion 161, a curved support portion 162 disposed opposite the flat portion 161, and the flat portion 161 and the curved support part 162 are comprised by the curved connection part 163 which connected the edge part, and is a leaf spring which becomes substantially "R" shape when seen from the side.

The mechanism spring 160 has a complicated shape, but in order to prevent eccentricity during rotation, it is necessary to match the center of gravity G when viewed from the side and the axial direction with the center of rotation of the drive shaft 140. have.

Specifically, the flat portion 161 is a portion that is directly fitted to the drive shaft 140, the fitting groove 161a is formed on one side to be fitted to the drive shaft 140, so that the fitting groove 161a between the two Two extension pieces 161b are formed.

In this case, the inner side of the two extension pieces 161b forming the fitting groove 161a of the flat portion 161 may be disposed in parallel with each other. The two extension pieces 161b are actually coupled to the drive shaft 140, and the inner side of the extension piece 161b is fitted into the coupling groove 144 formed around the drive shaft 140 when assembled. .

In addition, at the inlet of the fitting groove 161a of the flat portion 161, the engaging pieces 161c protruding from the inside of the two extension pieces 161b are formed and disposed to face each other. Accordingly, when the two extension pieces 161b are coupled to the drive shaft 140, first, the two locking pieces 161c elastically cross the drive shaft 140 so that the spring 160 is coupled after the coupling. This can be prevented from being separated again in the assembling direction.

In addition, a through hole (161d) is formed in or near the engaging piece (161c) of the flat portion (161). Accordingly, the elasticity is further improved when the locking piece 161c crosses the driving shaft 140, thereby enabling a more smooth coupling.

The curved support portion 162 is connected to the curved connection portion 163 when viewed from the side, and two support pieces 162a disposed opposite the two extension pieces 161b of the flat portion 161. And a locking piece 162b extending from the support piece 162a.

Here, the support piece 162a of the said curved support part 162 is the structure convexly bent toward the flat part 161. As shown in FIG. That is, the support piece 162a is configured to move away along the flat portion 161 and then move away again.

In addition, when viewed from the side, the engaging piece 162b of the curved support portion 162 is bent while moving away from the flat portion 161. In the figure, the engaging piece 162b of the curved support portion 162 has a hook shape. Accordingly, the locking piece 162b is easily caught by the hinge pin 610 between the swash plate 150 and the connection link 600 which will be described later.

The locking piece 162b is preferably formed in an arc shape so as to facilitate coupling with the hinge pin 610, but is not necessarily limited thereto.

On the other hand, the curved connection portion 163 is a curved two connecting the one end of the two extension pieces 161b of the flat portion 161 and one end of the two support pieces 162a of the curved support portion 162, respectively. It consists of two connecting pieces 163a. As viewed from the side, the curved connection portion 163 is preferably arcuate but not necessarily arcuate.

According to this configuration, the mechanism spring 160 is firmly fitted to the drive shaft 140 to rotate with the drive shaft 140.

When the mechanism spring 160 is assembled, it is fitted in the manner of being fitted around the drive shaft 140 from the curved connecting portion 163, but the part that is actually coupled is the inner side of the two extension pieces 161b of the flat portion 161. And a coupling groove 144 around the drive shaft 140.

In this case, since the engaging piece 161c protruding from the inner side of the extension piece 161b elastically rides over the coupling groove 144 of the drive shaft 140, the mechanism spring 160 is driven by the drive shaft 140. ) Can be prevented from deviating.

As a result, the tension catching portion 162b of the mechanism spring 160 is elastically caught by the hinge pin 610 coupled between the swash plate 150 and the connecting link 600.

Accordingly, when the swash plate 150 comes to a minimum inclination angle state, the support piece 162a of the mechanism spring 160 is elastic to the side plate or the hinge pin 610 of the swash plate 150 or the connection link 600. Compression force acts in contact with the to be able to elastically maintain the minimum inclination angle of the swash plate 150.

In addition, from the time when the swash plate 150 begins to be variable, the engaging piece 162b of the mechanism spring 160 is caught by the hinge pin 610 so that the tensile force acts, and the swash plate 150 is at the maximum inclination angle position. Until it is deformed.

As a result, the hysteresis of the variable mechanism of the swash plate 150 due to the compression-tensioning action of the mechanism spring 160 according to the variable inclination angle of the swash plate 150 is eliminated, that is, the slack is removed. ), The movement becomes more smooth (see FIG. 10).

Example 2

Another embodiment of a mechanism spring having the same principle as Embodiment 1 is shown in Figs. Incidentally, the same description as in the first embodiment will be omitted.

First, according to the present embodiment, the hinge rod 162c protruding outward is formed in the mechanism spring 160 instead of the locking piece 162b of the first embodiment.

As shown in FIGS. 7 and 8, the hinge rod 162c is configured to connect the connection link 600 and the mechanism spring 160 when the mechanism spring 160 is fixedly installed on the drive shaft 140. Element.

Specifically, the load transfer link 167 is hingedly coupled between the hinge rod 162c and the hinge pin 610 of the connection link 600.

According to this configuration, the load transfer link 167 pushes the support piece 162a of the mechanism spring 160 when the swash plate 150 comes to the minimum inclination angle state, while the swash plate 150 is Since the load transfer link 167 pulls the support piece 162a of the mechanism spring 160 from the point of time varying beyond the minimum inclination angle, the tensile force acts.

As a result, since the support piece 162a is connected to the hinge pin 610 of the connection link via the load transmission link 167, the minimum inclination angle of the swash plate can be elastically compressed to support the swash plate 150. The tension force is applied until the maximum inclination angle position is obtained by pulling the support piece 162a of the mechanism spring 160 from the time when the variable is started.

As a result, the hysteresis of the variable mechanism of the swash plate 150 due to the compression-tensioning action of the mechanism spring 160 according to the variable inclination angle of the swash plate 150 is eliminated, that is, the slack is removed. ) Movement becomes smoother.

According to the present invention having the configuration as described above, the mechanism spring connected to the swash plate is composed of a plate-like spring rather than a spring form and receives a compressive force and a tensile force according to the inclination angle of the swash plate, so that the hysteresis of the variable mechanism is reduced, so that the motion of the swash plate is smooth. It is done smoothly.

In addition, according to the present invention, it is possible to improve the initial operability of the compressor driving at the minimum inclination angle during operation of the air conditioner, and to easily buffer the fluctuation of the swash plate inclination angle during the compression process to the minimum minimum inclination angle during the non-operation of the air conditioner. .

In addition, according to the present invention, since the spring is assembled by forming a coupling groove around the drive shaft and sandwiching the coupling groove, the assembly operation is easy and the structure is very simple.

In addition, according to the present invention, by the coupling of the coupling groove of the drive shaft and the extension of the flat portion and the coupling of the drive shaft of the locking piece, the drive shaft and the mechanism spring is firmly fixed, thereby eliminating friction noise due to sliding contact during operation of the compressor.

Claims (8)

delete In the mechanism spring fitted to the drive shaft of the swash plate compressor, One side has a fitting groove is formed to be fitted to the drive shaft, the flat portion formed with two extension pieces with the fitting groove therebetween; As viewed from the side, two support pieces which are disposed opposite the two extension pieces of the flat portion and the intermediate portion is convexly bent toward the flat portion, extend in a direction away from the support piece with respect to the flat portion, and are curved Curved support portion consisting of a bent formed bending piece; And Mechanism spring fitted to the drive shaft of the swash plate compressor characterized in that it comprises a curved connecting portion consisting of two connecting pieces of the curved connecting the one end of the two extension pieces of the flat portion and the one end of the two support pieces of the curved support, respectively. . In the mechanism spring fitted to the drive shaft of the swash plate compressor, One side has a fitting groove is formed to be fitted to the drive shaft, the flat portion formed with two extension pieces with the fitting groove therebetween; When viewed from the side, it is disposed opposite the two extension pieces of the flat portion, the front end is composed of two support pieces each of which is formed a hinge rod outward, curved support portion formed convexly bent toward the flat portion; And Mechanism spring fitted to the drive shaft of the swash plate compressor characterized in that it comprises a curved connecting portion consisting of two connecting pieces of the curved connecting the one end of the two extension pieces of the flat portion and the one end of the two support pieces of the curved support, respectively. . The method according to claim 2 or 3, Mechanism spring to be fitted to the drive shaft of the swash plate compressor, characterized in that the two inner side extending to form the fitting groove of the flat portion are arranged parallel to each other. A cylinder block having a plurality of cylinder bores, a housing formed with a swash plate chamber, and a suction chamber and a discharge chamber communicating with the cylinder bore and a suction / discharge valve, and rotatably supported by the cylinder block and the housing. The drive shaft and the swash plate is installed so that the inclination angle is changed to the drive shaft, the connecting link connecting the drive shaft and the swash plate so as to rotate relative, the swash plate and the sliding movement is coupled and the reciprocating movement to the cylinder bore In the swash plate compressor comprising a piston that is possibly accommodated, The swash plate type compressor of claim 2, wherein the mechanism spring is fixedly mounted to the drive shaft, and the engaging piece of the mechanism spring is coupled to the connection portion between the swash plate and the connecting link. A cylinder block having a plurality of cylinder bores, a housing formed with a swash plate chamber, and a suction chamber and a discharge chamber communicating with the cylinder bore and a suction / discharge valve, and rotatably supported by the cylinder block and the housing. The drive shaft and the swash plate is installed so that the inclination angle is changed to the drive shaft, the connecting link connecting the drive shaft and the swash plate so as to rotate relative, the swash plate and the sliding movement is coupled and the reciprocating movement to the cylinder bore In the swash plate compressor comprising a piston that is possibly accommodated, The swash plate compressor of claim 3, wherein the mechanism spring is fixed to the drive shaft, and a load transfer link is hingedly coupled between the hinge rods and the connection link. The method of claim 6, The load transfer link is a swash plate-type compressor, characterized in that connected to the hinge pin and the hinge pin of the link. The method according to any one of claims 5 to 7, When viewed from the side, the axial center of the drive shaft is passed through the center of gravity of the mechanism spring swash plate compressor.

Images