KR20090052919A - Variable displacement swash plate type compressor - Google Patents

Abstract

The present invention relates to a variable displacement swash plate compressor.

The present invention is a variable displacement swash plate type compressor comprising a lug plate fixed to one side of the drive shaft, the swash plate is provided on the other side of the drive shaft and the inclination angle is variable while rotating by the lug plate, the insertion groove is formed on one side of the lug plate And an inclined surface is formed on both inner walls of the insertion groove, and the inclined surface is formed to be inclined in the inward direction of the lug plate, and the swash plate is formed with an arm inserted into the insertion groove, and rollers supported on the inclined surface on both sides of the arm. Each is installed.

As described above, by forming inclined surfaces on both inner walls of the insertion groove of the lug plate and installing conical or spherical rollers on the swash plate to be in close contact with the inclined surfaces, the precision machining portion can be minimized, thereby greatly improving the ease of manufacture. The manufacturing cost and time can be greatly saved, and even if the magnitude of the driving force applied to the swash plate is suddenly changed, there is an effect that smooth power transmission is possible.

Swash plate compressor, lug plate, swash plate, conical roller, spherical roller

Description

VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR

The present invention relates to a variable displacement swash plate compressor, and more particularly, to a variable displacement swash plate type compressor that can improve the coupling of the lug plate and the swash plate to improve the stability of power transmission and ease of manufacture.

In general, a swash plate type compressor, which is widely used as a compressor of an automotive air conditioner, is provided with a disk-shaped swash plate having a variable inclination angle on a drive shaft receiving engine power, rotated by a drive shaft, and the circumference of the swash plate by the rotation of the swash plate. A plurality of pistons installed via a shoe along the structure is configured to suck, compress and discharge the refrigerant gas by linearly reciprocating the inside of the plurality of cylinder bores formed in the cylinder block.

In particular, in recent years, the inclination angle of the swash plate is changed according to the change of the heat load to achieve precise temperature control by controlling the feed amount of the piston, and the inclination angle is continuously changed to reduce the sudden torque fluctuation of the engine caused by the compressor, thereby making the vehicle more comfortable to ride. A variable-capacity swash plate type compressor capable of improving the efficiency has been proposed.

Patent Publication No. 0529716 (registered owner: Doowon Gakuin, Doowon Electronics Co., Ltd.) discloses an example of such a variable displacement swash plate type compressor.

The variable displacement swash plate compressor has a plurality of cylinder bores (11a) formed in parallel in the longitudinal direction on the inner circumferential surface, as shown in Figures 1 and 2 and the cylinder block 11 constituting the outside of the compressor, A front housing 12 disposed at the front end of the cylinder block 11 to form a swash plate chamber 12a, and a drive shaft 14 rotatably supported by the cylinder block 11 and the front housing 12; And a lug plate 18 fixed to the drive shaft 14 in the swash plate chamber 12a of the front housing 12, a suction chamber 13a and an discharge chamber 13b therein, and the cylinder The rear housing 13 disposed at the rear end of the block 11, the swash plate 15 formed in the shape of a circular plate while the inclination angle can be changed while rotating by the lug plate 18, and the lug plate 18 Spring (17) supported between and swash plate (15) It is configured, including the shoe 21, the swash plate 15 and the piston 20 to be possibly combined sliding and can be reciprocated in the cylinder bore (11a) accommodated through a.

Meanwhile, the valve plate 16 provided between the rear housing 13 and the cylinder block 11 has a suction port 16a, a cylinder bore 11a, and a discharge chamber communicating the cylinder bore 11a with the suction chamber 13a. Discharge ports 16b for communicating 13b are formed, respectively.

In addition, a suction valve (not shown) and a discharge valve are provided at the inlet port 16a and the outlet port 16b to open and close the inlet port 16a and the outlet port 16b by a pressure change caused by the reciprocating motion of the piston 20. (Not shown) are provided respectively.

Meanwhile, a first locking groove 18a is formed at the rear of the lug plate 18 facing the swash plate 15, and guide surfaces 18b are formed at both sides of the first locking groove 18a, respectively. The second locking groove 18c is formed inward along the guide surface 18b.

The roller 15b is rotatably installed on the arm 15a of the swash plate 15, and the roller 15b is rolled in a state supported by the guide surface 18b.

That is, when the inclination angle is changed while the swash plate 15 is rotated, the roller 15b may be raised and lowered while being supported by the guide surface 18b to ensure stable supporting force.

However, in order to insert the roller provided in the conventional swash plate to be movable to the guide surface and the second locking groove of the lug plate, it is necessary to precisely process the main surface of the roller and the guide surface to which the roller is inserted and the second locking groove. There was a problem that a lot of manufacturing cost and time.

Moreover, in the related art, when the magnitude of the driving force applied to the swash plate is sharply changed, the inclination angle of the swash plate is not smoothly changed by keeping the roller located on the second locking groove rather than climbing the guide surface.

The present invention has been made to solve the above problems, the object of the present invention is to improve the coupling portion of the swash plate and the lug plate to minimize the precision processing portion, thereby ensuring the ease of manufacture and stable driving force The present invention provides a variable displacement swash plate compressor.

The present invention for achieving the above object is a variable displacement swash plate type compressor comprising a lug plate fixed to one side of the drive shaft, the swash plate is provided on the other side of the drive shaft and the swash plate is variable while the inclination angle is rotated by the lug plate, Inserting grooves are formed at one side of the plate, and inclined surfaces are formed at both inner walls of the inserting grooves, respectively, and the inclined surfaces are formed to be inclined in the inward direction of the lug plate, and the swash plate is formed with an arm inserted into the inserting groove. Both sides are characterized in that the rollers supported on the inclined surface are rotatably installed respectively.

On the other hand, the present invention is a variable displacement swash plate type compressor including a lug plate fixed to one side of the drive shaft, the swash plate is provided on the other side of the drive shaft and the inclination angle is variable while rotating by the lug plate, the insertion groove on one side of the lug plate And a curved surface is formed on both inner walls of the insertion groove, and the curved surface is formed to be concave inwardly of the lug plate. Characterized in that the rollers are rotatably installed.

In addition, the roller is characterized in that the conical shape.

In addition, the roller is characterized in that the spherical shape.

In addition, the cross section of the roller may be a convex arc shape.

As described above, by forming inclined surfaces on both inner walls of the insertion groove of the lug plate and installing conical or spherical rollers on the swash plate to be in close contact with the inclined surfaces, the precision machining portion can be minimized, thereby greatly improving the ease of manufacture. The manufacturing cost and time can be greatly saved, and even if the magnitude of the driving force applied to the swash plate is suddenly changed, there is an effect that smooth power transmission is possible.

Hereinafter, a variable displacement swash plate compressor of the present invention will be described in detail with reference to FIGS. 3 to 7.

In the description of the variable displacement swash plate compressor of the present invention, a configuration having the same function as that described above in the related art will be described using the same reference numeral.

The variable displacement swash plate type compressor of the present invention has a plurality of cylinder bores (11a) formed on the inner circumferential surface of the cylinder block (11a) formed in parallel in the longitudinal direction and constitutes the exterior of the compressor, and the cylinder block (11) of the cylinder block (11). A front housing 12 disposed at the front end to form the swash plate chamber 12a, a drive shaft 100 rotatably supported by the cylinder block 11 and the front housing 12, and the front housing 12; The lug plate 200 fixed to the drive shaft 100 in the swash plate chamber 12a, and the suction chamber 13a and the discharge chamber 13b are formed therein, and the rear end of the cylinder block 11 is formed. The rear housing 13 is disposed in the, the inclination angle can be changed while rotating by the lug plate 200 and the swash plate 300 formed in a circular plate shape, between the lug plate 200 and the swash plate 300 Through the spring 17 and the shoe 21 supported by the The swash plate 300 is slidably coupled and includes a piston 20 that is reciprocally accommodated in the cylinder bore 11a.

Here, the cylinder block 11, the front housing 12, the rear housing 13, the spring 17, the piston 20 of the configuration of the variable displacement swash plate type compressor has the same function as the configuration described above in the prior art. The overlapping description is omitted.

3 to 5, the drive shaft 100 is to rotate the lug plate 200 to be described later, both ends are rotatably installed in the front housing 12 and the cylinder block 11, respectively. However, the end installed in the front housing 12 is connected to the engine (not shown) and the power transmission through the pulley (not shown).

That is, rotational power is transmitted from the engine through the pulley to rotate the drive shaft 100.

Here, the drive shaft 100 has the same function as the drive shaft 14 described above in the prior art, the overlapping description is omitted.

The lug plate 200 is for rotating the swash plate 300 to be described later and varying the inclination angle, is fixed to one side of the drive shaft 100, the insertion groove 210 on one side facing the swash plate 300 Is formed, the inclined surface 220 is formed on both inner walls of the insertion groove 210, respectively.

Here, the inclined surface 220 has a "V" shape that gradually decreases in width when viewed from the top and front with reference to FIGS. 3 and 5.

That is, as the inclined surface 220 is formed as described above, the roller of the swash plate 300 to be described later may smoothly ride up the inclined surface 220, and its configuration may be simplified to minimize the precision processing portion.

The swash plate 300 is for reciprocating the piston 20 in the cylinder bore 11a. The swash plate 300 is fitted to the drive shaft 100 so as to be movable, and on one side facing the lug plate 200, the lug is provided. An arm 310 is inserted into the insertion groove 310 of the plate 200, and rollers 320 supported on the inclined surface 220 are rotatably installed on both side surfaces of the arm 310.

Here, it is preferable that the roller 320 has a conical shape so as to be supported in surface contact with the inclined surface 220.

In addition, the conical roller 320 is preferably rotatably coupled to both sides of the arm 310, through which the conical roller 320 is rolling motion along the inclined surface 220 in close contact with the inclined surface 220 The friction force can be minimized, and the swash plate 300 can smoothly change its inclination angle.

Referring to the assembly state of the drive shaft 100, the lug plate 200 and the swash plate 300 as described above are as follows.

First, the lug plate 200 is inserted and fixed through one side of the driving shaft 100.

On the other hand, both sides of the arm 310 of the swash plate 300 is rotatably coupled to the conical roller 320.

Then, the swash plate 300 coupled with the sleeve 18 and the conical roller 320 for supporting the spring 17 and the swash plate 300 on the other side of the drive shaft 100 facing the lug plate 200. ), And then, when the conical roller 320 coupled to the swash plate 300 is in close contact with the inclined surface 220 of the lug plate 200, the fixing ring 19 is coupled to the driving shaft 100 to assemble the assembly. Is done.

 Referring to the operating state of the variable displacement swash plate type compressor having the assembly state as described above are as follows.

First, the rotational power is transmitted from the engine (not shown) through the pulley (not shown) so that the drive shaft 100 rotates, and accordingly, the power transmission lug plate 200 fixed to the drive shaft 100 (eg, press-fitted) is installed. ) Rotates, and at the same time, power is transmitted through the conical roller 320 supported on the inclined surface 220 of the lug plate 200, and the swash plate 300 rotates while varying its inclination angle.

In addition, as the shoe 21 and the piston 20 reciprocate in the cylinder due to the initial angle of the swash plate 300, the refrigerant gas is sucked from the suction chamber 13a, and the compression and discharge chamber in the bore 11a is carried out. The discharge at 13b is performed continuously.

 At this time, the capacity of the refrigerant gas discharged is controlled by the pressure control in the swash plate chamber 12a, which is made by a pressure control valve (not shown).

If the pressure in the swash plate chamber 12a is reduced, the swash plate 300 is inclined due to the pressure difference between the swash plate chamber 12a and the cylinder bore 11a, and at the same time, the conical roller 320 is the lug plate 200. Cloud movement along the inclined surface (220) of.

That is, the conical roller 320 is guided while transferring the rolling motion along the inclined surface 220, through which the inclination movement of the swash plate 300 is made smoothly.

Moreover, even if the magnitude of the driving force applied to the swash plate 300 by the lug plate 200 is drastically changed or the inclination angle of the swash plate 300 is changed, the inclined surface 220 and the conical roller 320 are diagonally in contact with each other, so that the conical roller 320 By cushioning the ascending surface 220, it is possible to transmit a stable power.

On the other hand, in the above-described embodiment has been described an example in which the surface of the conical roller 320 in close contact with the inclined surface 220 of the lug plate 200 is a straight line, for example, the surface of the conical roller 320 is convex arc-shaped It may be.

Hereinafter, in describing other embodiments of the present invention, the same reference numerals are used for components having the same configuration and function as the above-described embodiments, and redundant descriptions thereof will be omitted.

6 illustrates another embodiment of the roller 320 described above.

The roller 320 'of the present embodiment has a round spherical shape like a ball, as shown in FIG.

That is, by being in close contact with the inclined surface 220 of the lug plate 200 through the spherical roller 320 ′, a more stable driving force can be transmitted, and noise can be greatly reduced.

On the other hand, only the part of the roller 320 'of the above-described embodiment that comes into close contact with the inclined surface 220 of the lug plate 200 may have a rounded convex arc shape.

7 shows another embodiment of the lug plate 200 described above.

In the lug plate 200 ′ of the present embodiment, as shown in FIG. 7, insertion grooves 210 are formed at one side, and curved surfaces 230 are formed at both inner walls of the insertion grooves 210, respectively. The curved surface 230 is formed to be concave inwardly of the lug plate 200 ′.

That is, when the conical roller 320 or the spherical roller 320 'is in close contact with the curved surface 230, it can provide a more stable buffering force.

1 is a view showing a conventional variable displacement swash plate compressor.

Figure 2 is a perspective view showing a conventional swash plate peripheral structure.

Figure 3 is an exploded perspective view showing the structure around the swash plate according to the present invention.

4 is an assembled perspective view of FIG. 3.

5 is a plan view of FIG. 4.

6 is a perspective view showing another embodiment of the roller according to the present invention.

7 is a perspective view showing another embodiment of a lug plate according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: drive shaft 200,200 ': lug plate

210: insertion groove 220: inclined surface

230: curved surface 300: swash plate

310: arm 320,320 ': roller

Claims (5)

A variable displacement swash plate type compressor comprising a lug plate fixedly installed at one side of a drive shaft, and a swash plate provided at the other side of the drive shaft, and having a swash plate which rotates by a lug plate and whose inclination angle is variable. Insertion grooves are formed on one side of the lug plate, and inclined surfaces are formed on inner walls of both sides of the insertion groove, respectively, and the inclined surfaces are inclined in the inward direction of the lug plate, Arms to be inserted into the insertion groove is formed in the swash plate and the variable displacement swash plate type compressor characterized in that the rollers supported on the inclined surface are rotatably installed on both sides of the arm. A variable displacement swash plate type compressor comprising a lug plate fixedly installed at one side of a drive shaft, and a swash plate provided at the other side of the drive shaft, and having a swash plate which rotates by a lug plate and whose inclination angle is variable. Insertion grooves are formed on one side of the lug plate, curved surfaces are formed on inner walls of both sides of the insertion groove, and the curved surfaces are concave inwardly of the lug plate. The swash plate is formed with an arm to be inserted into the insertion groove, the variable capacity swash plate type compressor, characterized in that the rollers supported on the curved surface on both sides of the arm are rotatably installed. The method of claim 1, The variable displacement swash plate compressor characterized in that the roller is conical. The method according to claim 1 or 2, Cross section of the roller supported on the inclined surface is a variable swash plate type compressor, characterized in that the convex arc shape. The method according to claim 1 or 2, The roller is variable capacity swash plate type compressor, characterized in that the spherical shape.

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