KR101925674B1 - Variable displacement swash plate type compressor - Google Patents

Abstract

The present invention provides a variable displacement swash plate compressor capable of improving the connecting structure between a lug plate and a swash plate to disperse rotational torque, compression load and torsional moment acting on the swash plate and the lug plate, Since the center lug arm and the left and right lug arms of the lug plate are interdigitated with each other, the torsional moment is dispersed and supported upon rotation of the lug plate, so that the load acting on each arm can be reduced. As a result, the controllability and durability of the swash plate can be improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable displacement swash plate type compressor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable displacement swash plate type compressor in which a connection structure between a lug plate and a swash plate is improved.

BACKGROUND ART [0002] Generally, an air conditioner used in an automobile is a device for keeping a temperature of an automobile room lower than an external temperature by using a refrigerant, and includes a compressor, a condenser, and an evaporator for constituting a circulation cycle of the refrigerant.

Such a compressor is a device for compressing and feeding a refrigerant, and is driven by the engine or a motor.

The swash plate type compressor can be classified into a capacity variable swash plate type compressor in which a disk-shaped swash plate is adapted to rotate the drive shaft and a fixed swash plate type compressor in which the swash plate type compressor is fixed.

In the variable displacement swash plate type compressor, the inclination angle of the swash plate is continuously changed in accordance with the variation of the thermal load, and the flow rate is controlled precisely by controlling the amount of the piston to be transferred, and the sudden torque change of the engine by the compressor is prevented, There is an advantage to be improved.

The lug plate has a protrusion protruding toward the swash plate. The swash plate is formed with an arm having a moving roller that comes into contact with the protrusion and rolls . The lug plate and the swash plate are connected to each other through surface contact between the protrusions and the arms.

At this time, as the swash plate is inclined in which the inclination angle is changed with respect to the lug plate and rotational force for transmitting the rotational force of the lug plate to the arm is simultaneously made on both sides of one side and the other side of the projection, And the load is concentrated on the protruding portion of the lug plate, so that the durability is weakened and the breakage is easily caused by the crack.

On the other hand, the background art of the present invention is disclosed in Korean Patent No. 10-1193399.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a swash plate in which a pair of arm and a center lug arm of a lug plate, left and right lug arms, A single torque transmitting surface in which a plurality of clearances and opposed surfaces are in contact with each other is formed so that the torsional moment is dispersed and supported during rotation of the lug plate so that the load acting on each arm can be reduced, And to provide a variable displacement swash plate type compressor capable of improving the stability and durability of the compressor.

The variable displacement swash plate type compressor according to the present invention includes a lug plate coupled to be fixed to a drive shaft and a swash plate coupled to the lug plate and rotating while varying an inclination angle of the swash plate, The lug plate includes a plate and a center protruding from the plate so as to be inserted between the first and second arms to engage with the body of the swash plate. The first and second arms protrude toward the center of the swash plate, A lug arm; and left and right lug arms projecting from the plate so as to be spaced apart from each other and supporting respective side surfaces of the first and second arms, respectively, the first arm of the swash plate, And the first and second arms and the left and right lug arms are spaced apart from each other, and a center clearance side c2 and a left and right clearance c1 and c4, respectively, and the opposed faces of the second arm and the center lug arm, which are located between the second arm of the swash plate and the other side c3 of the center lug arm, are in contact with each other, Wherein when the torque transmitting surface is formed between the second arm and the other side surface of the center lug arm, the one center side c2 of the center clearance forms a left side clearance c1 (C1 < c2).

The variable displacement swash plate compressor according to the present invention includes a lug plate fixed to a drive shaft and a swash plate coupled to the lug plate and rotating while varying an inclination angle of the swash plate, And a pair of first and second arms protruding from the lug plate so as to be spaced apart from each other. The lug plate includes: a plate; a protrusion protruding from the plate so as to be inserted between the first and second arms, And a left and a right lug arm projecting from the plate so as to be spaced apart from each other and supporting respective side surfaces of the first and second arms, respectively, the first and second arms of the swash plate, At least one of the first and second arms and the left and right lug arms is spaced apart from one side and the other side of the center lug arm, , The center clearance on the other side (c3), and the right clearance (c4), and the first arm of the swash plate and the first lug arm located between the left lug arm (c1) Wherein the torque transmission surface is formed at a position between the first arm and the left lug arm so as to transmit power for rotating the swash plate, The center clearance side c3 is formed to be larger than the center clearance side c2 (c2 <c3).

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In addition, the swash plate according to the present invention is formed with through holes through which the center lug arm of the lug plate passes, and both side surfaces of the through holes are formed as surface contact portions which face both side surfaces of the center lug arm.

According to the variable displacement swash plate compressor according to at least one of the above-described exemplary embodiments of the present invention, the center lug arm of the pair of arms of the swash plate and the left and right lug arms of the swash plate are meshed with each other, A plurality of clearances spaced apart from each other and a single torque transmitting surface contacting the opposing surfaces are formed so that the torsional moment during the rotation of the lug plate is dispersed and supported so that the load acting on each arm can be reduced. As a result, the controllability and durability of the swash plate can be improved.

1 is a top plan view of a variable displacement swash plate compressor according to an embodiment of the present invention.
FIG. 2 and FIG. 3 are explanatory diagrams showing the movement of the swash plate in the variable displacement swash plate type compressor shown in FIG. 1. FIG.
FIG. 4 is a top plan view of the lug plate of the variable displacement swash plate compressor shown in FIG. 1, and a side view illustrating a side view of the lug plate.
FIG. 5 is a plan view of the swash plate of the variable displacement swash plate type compressor shown in FIG. 1, and is a side view illustrating a side view of the swash plate.
6 is an exploded perspective view showing a lug plate and a swash plate of the variable displacement swash plate type compressor shown in FIG.
7 is a top plan view of a variable displacement swash plate compressor according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, at the time of the present application, It should be understood that variations can be made.

1 is a plan view of a variable displacement swash plate type compressor according to an embodiment of the present invention.

Referring to the drawings, the variable displacement swash plate type compressor according to the present invention includes a drive shaft 20, a lug plate 100 coupled to be fixed to the drive shaft 20, And a swash plate 200 whose inclination angle is variable.

The driving shaft 20 is fixedly coupled to the lug plate 100 so that the driving shaft 20 rotates as the driving shaft 20 rotates and the driving shaft 20 rotates And transmits the power for rotating the lug plate 100.

The lug plate 100 is coupled to the drive shaft 20 so that the drive shaft 20 is rotated together with the drive shaft 20. The lug plate 100 includes a plate 110, a center lug arm 120, and left and right lug arms 131 and 132.

The plate 110 forms a body of the lug plate 100 and is formed in a substantially circular shape and the center lug arm 120 and the left and right lug arms 131 and 132 are formed on one side of the plate .

The center lug arm 120 protrudes from the plate 110 to be sandwiched between a pair of arms 211 and 212 protruding from the swash plate 200 and is engaged with the body 210 of the swash plate 200 . The center lug arm 120 passes through the body 210 of the swash plate 200 and transmits a rotation moment for rotating the swash plate 200.

The left and right lug arms 131 and 132 are disposed at the center of the center lug arm 120 and protrude from the plate 110 at a distance from each other. The left and right lug arms 131 and 132 support at least a part of the pair of first and second arms 211 and 212 protruding from the swash plate 200 on both sides.

The swash plate 200 includes a body 210 and a pair of arms 211 and 212 protruding from the body 210 toward the lug plate 100.

The pair of first and second arms 211 and 212 are in contact with the left and right lug arms 131 and 132 and the center lug arm 120 to rotate the lug plate 100, It is possible to disperse the rotational moment to be transmitted to the main body 200. As a result, it is possible to overcome such a problem that the load is concentrated at a certain place (particularly, at the end side of the center lug arm 120), and durability is weakened or cracks are generated.

The first and second arms 211 and 212 and the left and right lug arms 131 and 132 and the other side of the center lug arm 120 The clearance 300 can be formed at intervals.

The clearance 300 is formed between the first and second arms 211 and 212 forming the pair of swash plates 200 and between the side surfaces 120a and 120b of the center lug arm 120, At least one portion of the gap between the first and second arms 211 and 212 of the swash plate 200 and the left and right lug arms 131 and 132 may be spaced apart from each other. have.

The first and second arms 211 and 212 and the side surfaces 120a and 120b of the center lug arm 120 and the first and second arms 211 and 212, It is preferable that any one of the left and right lug arms 131, 132 (c1, c4) is in contact with each other to form a torque transmitting surface 400 having a rotational moment.

1, when the torque transmitting surface 400 is formed between the second arm 212 and the other side 120b of the center lug arm 120, Left and right clearances 310 and 320 are formed between the second arms 211 and 212 and the left and right lug arms 131 and 132 so as to be spaced apart from each other. The center clearance 330 can be formed between the second arms 211 and 212 and the one side surfaces c2 of the center lug arm 120 are spaced from each other.

The center clearance 330 located between the side surfaces of the center lug arm 120 is positioned between the first arm 211 and the left lug arm 131 by a left clearance 310). (C1 &lt; c2)

Hereinafter, driving of each of the lug arms 120, 131, 132 and the pair of arms 211, 212 when the drive shaft 20 rotates will be described.

At least one of the left lug arm 131, the right lug arm 132, the center lug arm 120 and the pair of arms 211 and 212 is twisted when the driving shaft 20 rotates. Then, at least a part of two opposing surfaces with the clearance 300 therebetween comes into contact by twisting. Specifically, one of the left lug arm 131 and the first arm 211 is twisted and brought into contact with each other, or any one of the first arm 211 and the center lug arm 120 may be twisted and come into contact with each other . Further, either the second arm 212 or the right lug arm 132 may be twisted and contacted.

At this time, when the drive shaft 20 rotates, the pair of arms 211 and 212 are twisted and the twisted pair of arms 211 and 212 are engaged with the left and right lug arms 131 and 132 The left and right clearances 310 and 320 may be formed to be smaller than the center clearance 330 so as to be in contact with the center lug arm 120 after being first contacted. Since the rotational force is concentrated on the center lug arm 120, the left lug arm 131 and the first arm 211 may first contact each other to disperse the rotational force and the torsional moment.

One side surface of the pair of arms 211 and 212 is in contact with the center lug arm 120 to form a torque transmitting surface 400 for transmitting power for rotating the swash plate 200 .

Referring to the drawing, the center lug arm 120 directly presses the second arm 212 through the torque transmitting surface 400 to transmit a rotational force for rotating the swash plate 200 over a wide range . In other words, it is possible to prevent the load from being concentrated by transmitting the rotational force through the torque transmitting surface 400 of the rotational moment other than the surface where the center lug arm penetrates through the body 210 of the swash plate 200 directly.

2 and 3 are use state diagrams showing the movement of the swash plate 200 in the variable displacement swash plate type compressor shown in FIG.

Referring to the drawings, the swash plate 200 is formed to be rotatable relative to the lug plate 100. The pair of arms 211 and 212 (see Fig. 1) of the swash plate 200 are brought into sliding contact with the inclined surface 112 (see Fig. 3) formed on the lug plate 100, thereby changing the inclination angle of the swash plate 200 . A spring is provided on the back side of the swash plate 200 to press the swash plate 200 toward the lug plate 100 so that the swash plate 200 and the lug plate 100 are not separated.

On the other hand, a through hole 230 (see FIG. 5) is formed at the center of the body 210 of the swash plate 200 so that the drive shaft 20 (see FIG.

FIG. 4 is a view showing the lug plate 100 of the variable displacement swash plate type compressor shown in FIG. 1, and FIG. 5 is a view showing the swash plate 200 of the variable displacement swash plate type compressor shown in FIG.

4 (a) is a top view of the lug plate 100, and FIG. 4 (b) is a side view of the lug plate 100. As shown in FIG.

The left and right lug arms 131 and 132 and the center lug arm 120 are formed on the lug plate 100. The left and right lug arms 131 and 132 and the center lug arm 120 And the inclined surface 112 is in contact with the tips of the pair of arms 211 and 212 of the swash plate 200 to receive a compressive load.

The center lug arm 120 is protruded longer than the left and right lug arms 131 and 132. The front end of the center lug arm 120 passes through the swash plate 200 to transmit rotational force to the swash plate 200.

The end surface 110a of the inclined surface 112 may be formed so as to receive compression support so that the pair of arms 211 and 212 of the swash plate 200 do not rise any more.

FIG. 5 is a plan view of the swash plate of the variable displacement swash plate type compressor shown in FIG. 1, and is a side view illustrating a side view of the swash plate.

Referring to FIG. 5, FIG. 5 (a) is a plan view of the swash plate 200, and FIG. 5 (b) is a plan view of the swash plate 200.

A through hole 230 through which the center lug arm 120 of the lug plate 100 passes is formed in the swash plate 200. The side surfaces 231 and 232 of the through hole 230 may be formed with surface contact portions 234 opposed to both side surfaces 120a and 120b of the center lug arm 120. [ A rotational force can be transmitted from the distal end of the center lug arm 120 through the surface contact portion 234. [

6 is an exploded perspective view showing the lug plate 100 and the swash plate 200 of the variable displacement swash plate type compressor shown in FIG.

6 (a) is a view showing the swash plate 200, and FIG. 6 (b) is a view showing the lug plate 100. FIG.

6A, a pair of arms 211 and 212 protrude from one side of the body 210 of the swash plate 200, and between the pair of arms 211 and 212, Hole 230 is formed through the through-hole.

When the swash plate 200 rotates through the rotation of the lug plate 100 as described above, at least one arm of the first arm 211 or the second arm 212 is twisted, , The torsional moment is applied to the right lug arm. The twisting moment is transmitted in the direction F1.

Meanwhile, the center lug arm 120 contacts the first arm 211 and transmits a rotational force to the first arm 211 through the rotation torque transmitting surface 400 (see FIG. 1). At this time, the inner surface of the first arm 211 receives the rotational force, and the rotational force is applied to the first arm 211 in the direction of the arrow F2.

Since the pair of arms 211 and 212 slide in contact with the inclined surface 112, a compressive load is applied to the inclined surface 112 at the tip ends of the pair of arms 211 and 212, F3 direction.

Next, referring to FIG. 1B, the lug plate 100 is formed with an inclined surface 112 for guiding the inclined movement in a state of being in contact with the pair of arm tip portions of the swash plate 200. The inclined surface 112 is formed between the left and right lug arms 131 and 132 and the center lug arm 120 so that the pair of arms are inserted and a pair of arms are respectively supported.

A torsional moment is applied to the right lug arm 132 at a position opposite to the second arm 212 in the direction F1. The rotational force applied by the lug plate 100 to the front end portion of the center lug arm 120 is applied in the F2 direction while applying a force to rotate the swash plate 200. [

As described above, the pair of arms 211 and 212 are supported on the inclined surface 112 so that the compression load is applied in the direction F3.

7, when the torque transmitting surface 400 is formed at a position between the first arm 211 and the left lug arm 131, Center first and second clearances 310 and 320 are formed to be spaced apart from each other between the right lug arms 131 and 132 and both side surfaces c2 and c3 of the center lug arm 120, The right clearance 330 can be formed between the second arms 211 and 212 and the right lug arm 132 separated from each other.

At this time, it is preferable that the center second clearance 320 is formed to be larger than the center first clearance 310 (c2 <c3)

This is because the rotational force is concentrated on the left lug arm 131, so that the center first and second clearances 310 and 320 are first contacted to disperse the rotational force and the torsional moment.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

20: drive shaft 100: lug plate
110: plate 120: center lug arm
131: left side lug arm 132: right side lug arm
200: swash plate 211: first arm
212: second arm 210: body
230: Through hole 300: Clearance
310: Left clearance 320: Right clearance
330: Center clearance 400: Torque transmitting surface
230: through hole 231, 232: both sides of the through hole
234:

Claims (8)

A variable displacement swash plate compressor comprising: a lug plate fixed to a drive shaft; and a swash plate coupled to the lug plate and rotating while varying a tilt angle,
Wherein the swash plate includes a body and first and second arms which are formed as a pair and protrude from the body toward the lug plate,
The lug plate includes a plate, a center lug arm protruding from the plate so as to be inserted between the first and second arms to be engaged with the body of the swash plate, And left and right lug arms,
The first arm of the swash plate and the one side of the center lug arm and the first and second arms and the left and right lug arms are spaced apart from each other so that the center clearance side c2 and the left and right clearance c1 and c4, respectively,
The opposite surfaces of the second arm and the center lug arm, which are located between the second arm of the swash plate and the other side c3 of the center lug arm, are in contact with each other, and a torque transmitting surface Lt; / RTI &gt;
When a torque transmission surface is formed between the second arm and the other side surface of the center lug arm,
Wherein a center clearance side (c2) is formed to have an interval larger than a left clearance (c1) (c1 <c2).
A variable displacement swash plate compressor comprising: a lug plate fixed to a drive shaft; and a swash plate coupled to the lug plate and rotating while varying a tilt angle,
Wherein the swash plate includes a body and first and second arms which are formed as a pair and protrude from the body toward the lug plate,
The lug plate includes a plate, a center lug arm protruding from the plate so as to be inserted between the first and second arms to be engaged with the body of the swash plate, And left and right lug arms,
At least one portion of the first and second arms of the swash plate and one side and the other side of the center lug arm and between the first and second arms and the left and right lug arms are spaced apart from each other, , The center clearance on the other side (c3), and the right clearance (c4)
The first arm of the swash plate and the opposing faces of the first arm and the left lug arm located in the left lug arm c1 are brought into contact with each other so that the torque transmitting surface for transmitting the power for rotating the swash plate Lt; / RTI &
When a torque transmission surface is formed between the first arm and the left lug arm (c1)
And the other side of the center clearance (c3) is formed to have an interval larger than the center clearance side (c2) (c2 <c3).
delete delete delete delete delete The method according to any one of claims 1 and 2,
A through hole through which the center lug arm of the lug plate passes is formed in the swash plate,
Wherein the through-holes are formed on both side surfaces thereof with surface contact portions which are opposite to both side surfaces of the center lug arm.

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