JPH08284820A - Oscillating plate type compressor - Google Patents

Abstract

PURPOSE: To improve durability of a thrust roller bearing by preventing abrasion and seizure to be generated caused by deformation of a race of the thrust roller bearing. CONSTITUTION: Lubricating oil introducing grooves 51, 52 are inclined in relation to the rotary shaft axial direction of a needle roller 34 of a thrust roller bearing 33, the lubricating oil introducing grooves 51, 52 and the needle roller 34 of the thrust roller bearing 33 are crossed, and therefore, a race 35 of the thrust bearing 33 is not partially caved (deformed) into the lubricating oil introducing grooves 51, 52 by the needle roller 34. Accordingly, partial abrasion and seizure of the race 35 facing the lubricating oil introducing grooves can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating plate compressor, and more particularly to an oscillating plate compressor which can improve the durability of a thrust roller bearing arranged between a thrust flange and an inner wall surface of a front head. Regarding

[0002]

2. Description of the Related Art As a conventional rocking plate type compressor, FIGS.
Is known (Japanese Utility Model Publication No. 6-4377).

FIG. 5 is a vertical sectional view of a conventional rocking plate compressor.
FIG. 6 is a view showing the inner wall surface of the front head of the oscillating plate compressor of FIG. 5, and FIG. 7 is a relationship between the lubricating oil introducing groove of the thrust roller bearing receiving surface of the inner wall surface of the front head and the needle roller of the thrust roller bearing. FIG.

This oscillating plate compressor is fixed to a shaft 105 and is rotatably supported on a thrust roller bearing receiving surface 137 on the inner wall surface of the front head 104 via a thrust roller bearing 133 (for example, a needle roller bearing). Thrust flange 140 and thrust flange 14
Drive hub 141 which is connected to 0 and rotates integrally with the shaft 105, the swing plate 110 swingably mounted on the drive hub 141, the inner peripheral surface of the boss portion 104a of the front head 104 and the front surface of the shaft 105. A seal chamber 169 accommodating a seal member 155 that seals a gap between the outer peripheral surface of the side end portion and a lubricating oil supply path 200 that supplies the lubricating oil in the front head 104 to the seal chamber 169 is provided.

The thrust roller bearing 133 has a preload (preload) and a piston 107 for preventing abnormal noise.
And the compression reaction force of.

The lubricating oil supply passage 200 has lubricating oil introduction grooves 151 and 152 provided on the thrust roller bearing receiving surface 137 on the inner wall surface of the front head 104, and lubricating oil introduced through the lubricating oil introduction grooves 151 and 152. Seal room 1
It is composed of lubricating oil supply holes 153 and 154 which are supplied to the unit 69.

The lubricating oil separated in the front head 104 is fed from the lubricating oil introducing grooves 151, 152 into the sealing chamber 169 through the lubricating oil supply holes 153, 154, and at the front end of the shaft 105. It is also fed into the bearing accommodating chamber 168 in which the radial bearing 126 that rotatably supports is accommodated. The sliding parts such as the seal member 155 and the shaft 105 and the radial bearing 126 and the shaft 105 are lubricated and cooled by the lubricating oil fed. The lubricating oil in the seal chamber 169 and the bearing housing chamber 168 is discharged into the front head 104.

[0008]

However, since the race 135 of the thrust roller bearing 133 is thin, the thrust flange 140 rotates and the needle roller 134 of the thrust roller bearing 133 rotationally moves on the race 135.
As shown in FIG. 7, when the needle roller 134 faces the lubricating oil introducing grooves 151, 152 through the race 135 in the thrust direction (when the needle roller 134 and the lubricating oil introducing grooves 151, 152 are parallel to each other). As shown in FIG. 7, the race 1 facing the lubricating oil introducing grooves 151, 152
Part of 35 is deformed so as to be depressed into the lubricating oil introducing grooves 151, 152, and both ends 135a, 13 of the recessed parts are deformed.
5b wears and causes seizure, and thrust roller bearing 1
There was a problem of shortening the life of 33.

The present invention has been made in view of the above circumstances, and its object is to prevent the abrasion and seizure due to the deformation of the race of the thrust roller bearing, and to improve the durability of the thrust roller bearing. It is to provide a plate compressor.

[0010]

In order to solve the above-mentioned problems, the oscillating plate compressor according to the invention of claim 1 is provided on a rotary shaft and is rotatable on the inner wall surface of the housing via a thrust roller bearing. A drive force transmitting member supported by the drive force transmitting member, a swing plate mounted on the drive force transmitting member so as to swing, and swinging as the drive force transmitting member rotates, and a thrust roller bearing on the inner wall surface of the housing. A lubricating oil introduction groove that is provided on the receiving surface and guides lubricating oil inside the housing, and a lubricating oil supply that supplies the lubricating oil introduced through the lubricating oil introduction groove to the sliding portion between the housing and the rotary shaft. In the oscillating plate compressor having a hole, the lubricating oil introducing groove is not parallel to the rotation center axis of the roller of the thrust roller bearing.

The oscillating plate compressor according to the second aspect of the invention is
A starting end portion of the lubricating oil introduction groove is located on a front side in a rotation direction of the rotary shaft with respect to an end portion of the lubricating oil introduction groove communicating with the lubricating oil supply hole.

The oscillating plate compressor according to the third aspect of the invention is
Of at least two of the lubricating oil introducing grooves, a starting end of one lubricating oil introducing groove is located on a front side in a rotation direction of the rotary shaft with respect to an end of the lubricating oil introducing groove communicating with the lubricating oil supply hole. The starting end portion of the other lubricating oil introducing groove is located on the rear side in the rotation direction of the rotary shaft with respect to the ending portion of the lubricating oil introducing groove communicating with the lubricating oil supply hole.

[0013]

In the oscillating plate compressor according to the first aspect of the present invention, the lubricating oil introducing groove is not parallel to the center axis of rotation of the roller of the thrust roller bearing. Because of the crossing, a part of the race of the thrust roller bearing is not depressed (deformed) in the lubricating oil introduction groove by the roller.

In the oscillating plate compressor according to the second aspect of the present invention, the starting end portion of the lubricating oil introducing groove is located forward of the ending portion of the lubricating oil introducing groove communicating with the lubricating oil supply hole in the rotating direction of the rotary shaft. Because of the arrangement, the lubricating oil is more likely to enter the lubricating oil introducing groove than when the lubricating oil introducing groove is parallel to the rotation center axis of the roller of the thrust roller bearing.

In the oscillating plate compressor according to the third aspect of the present invention, of the at least two lubricating oil introducing grooves, the starting end of one lubricating oil introducing groove communicates with the lubricating oil supply hole to terminate the lubricating oil introducing groove. Is located on the front side in the rotating direction of the rotating shaft, and the starting end of the other lubricating oil introducing groove is located on the rear side in the rotating direction of the rotating shaft than the end of the lubricating oil introducing groove communicating with the lubricating oil supply hole. Therefore, the lubricating oil that has entered the sliding portion through the one lubricating oil introduction groove is discharged into the housing through the other lubricating oil supply hole.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an enlarged cross-sectional view showing an essential part of an oscillating plate type compressor according to a first embodiment of the present invention, FIG. 2 is a vertical sectional view showing the whole oscillating plate type compressor of FIG. 1, and FIG. FIG. 3 is an end view of the front head of the oscillating plate compressor of FIG. 2.

Cylinder block 1 of this oscillating plate compressor
The rear head 3 is attached to one end face of the rear plate 3 through the valve plate 2.
However, front heads (housings) 4 are fixed to the other end surfaces, respectively. In the cylinder block 1, a plurality of cylinder bores 6 are arranged at predetermined intervals in the circumferential direction around a shaft (rotational axis) 5. A piston 7 is slidably accommodated in each of the cylinder bores 6.

A crank chamber (inside the housing) 8 is formed in the front head 4, and a swing plate 10 that swings around a hinge ball 9 in conjunction with the rotation of the shaft 5 is formed in the crank chamber 8. Is housed. The rocking plate 10 is connected to the piston 7 via a connecting rod 11, and the rocking of the rocking plate 10 causes the piston 7 to reciprocate in the cylinder bore 6. The tilt angle of the swing plate 10 changes according to the pressure in the crank chamber 8. A seal chamber 69 is formed between the inner peripheral surface of the boss portion 4a of the front head 4 and the outer peripheral surface of the front end of the shaft 5, and a seal member (sliding portion) 55 is accommodated in the seal chamber 69. Has been done.

In the rear head 3, a discharge chamber 12 and
A suction chamber 13 located around the discharge chamber 12 is formed. The inside of the discharge chamber 12 is divided by the partition wall 14 into the discharge space 1
2a and the discharge space 12b are divided into two discharge spaces 12
The a and 12b communicate with each other through a throttle hole 14a formed in the partition wall 14.

The valve plate 2 has a discharge port 16 for communicating the cylinder bore 6 with the discharge space 12a,
Suction ports 15 that connect the cylinder bore 6 and the suction chamber 13 are provided at predetermined intervals in the circumferential direction. The discharge port 16 is opened / closed by a discharge valve 17, and the discharge valve 17 is fixed to the end face of the valve plate 2 on the rear head side by a bolt 19 together with a valve retainer 18.
9 is screwed into the screw hole 20 of the cylinder block 1 through the center hole 2a of the valve plate 2. The suction port 15 is opened and closed by a suction valve 21, and the suction valve 21 is arranged between the valve plate 2 and the cylinder block 1. The bolt 19 is provided with a guide hole (not shown) for guiding the high-pressure refrigerant gas in the discharge space 12a to the small diameter hole 22 of the cylinder block 1.

A screw hole 20, a small diameter hole 22 and a large diameter hole 23, which communicate with each other, are provided in the center of the cylinder block 1 along the center line of the cylinder block 1.
A radial bearing 24 is accommodated in the small diameter hole 22, and a thrust bearing 25 is accommodated in the large diameter hole 23. The radial bearing 24 and the thrust bearing 25 support the rear end of the shaft 5, and the front end of the shaft 5 is rotatable by a radial bearing (sliding part) 26 housed in a bearing housing chamber 68 of the front head 4. Supported by.

The cylinder block 1 has a suction chamber 13
And a communication passage 31 that connects the crank chamber 8 with the crank chamber 8,
A pressure adjusting valve 32 is provided in the middle of the communication passage 31,
By means of this pressure adjusting valve 32, the inside of the suction chamber 13 and the crank chamber 8
Pressure adjustment with the inside is performed.

A thrust flange 40 for transmitting the rotation of the shaft 5 to a drive hub 41 is fixed to an end portion of the shaft 5 on the front side.
0 is a thrust roller bearing (eg needle roller bearing)
It is rotatably pressed against the thrust roller bearing receiving surface 37 on the inner wall surface of the front head 4 via 33. One end of the thrust flange 40 and one end of the drive hub 41 are connected via a link arm 42, and the other end of the drive hub 41 can be separated from or in contact with the other end of the thrust flange 40. it can. The thrust flange 40 and the drive hub 41 constitute a driving force transmission member.

As shown in FIG. 1, the thrust roller bearing 33 is composed of a needle roller (roller) 34 and annular races 35 and 36 sandwiching the needle roller 34. The race 35 is fitted on the mounting step portion 38 of the front head 4 and is in contact with the thrust roller bearing receiving surface 37. The race 36 is fitted in the mounting recess 39 of the thrust flange 40. The race 35 has a projecting piece 35a that projects in the radial direction. A preload is applied to the thrust bearing 33 to prevent abnormal noise.

In the lower part of the inner wall surface of the front head 4, FIG.
As shown in, a pair of ribs 48a that sandwich the projecting piece 35a of the race 35 from both sides are integrally formed. Further, a pair of recesses 49, 50 for oil separation are provided in the upper portion of the inner wall surface of the front head 4, and lubricating oil introduction grooves 51, 52 communicating with the recesses 49, 50 are provided in the thrust roller bearing receiving surface 37.
It is provided in. The lubricating oil introducing grooves 51 and 52 communicate with the lubricating oil supply passages 53 and 54 provided in the front head 4, respectively.

As shown in FIG. 3, the lubricating oil introducing grooves 51 and 52 are inclined with respect to the center axis of rotation of the needle roller 34 of the thrust roller bearing 33. That is, the lubricating oil introduction groove 5
1, 52 and the center axis of rotation of the needle roller 34 are not parallel to each other, and the lubricating oil introducing grooves 51, 52 and the needle roller 34
It intersects with the rotation center axis of.

The swing plate 10 is swingably attached to the drive hub 41 via a radial bearing 60 and thrust bearings 61 and 62. The drive hub 41 includes a hinge ball 9 mounted on the shaft 5 slidably in the axial direction.
It is attached to the shaft 5 via. The hinge ball receiving surface 41b of the drive hub 41 is fixed to the hinge ball 9 so that the rotation and the tilting operation of the drive hub 41 are not hindered.
Is loosely fitted to the outer peripheral surface of the. A male screw 63 is provided on the outer peripheral surface of the boss portion 41a of the drive hub 41, and a balance weight 64 and a lock washer 65 are attached to the outer periphery of the boss portion 41a. The balance weight 64 and the lock washer 65 are mounted on the boss portion 41a. It is fixed by a lock nut 66 which is screwed into the male screw 63 of.

A coil spring 44 is mounted on the outer circumference of the shaft 5 between the hinge ball 9 and the thrust flange 40.
The hinge ball 9 is biased toward the cylinder block 1 by the coil spring 44. A stopper 45 is fixed to the shaft 5, and a plurality of disc springs 46 and a winding spring 47 are sequentially mounted on the outer periphery of the shaft 5 between the stopper 45 and the hinge ball 9. The hinge ball 9 is biased toward the thrust flange 40 side.

A restraint pin 70 is inserted in the swing plate 10 in the radial direction, and a slipper 67 is attached to one end of the restraint pin 70.

Next, the operation of this oscillating plate compressor will be described.

When the rotational power of the vehicle-mounted engine (not shown) is transmitted to the shaft 5, the shaft 5 rotates together with the thrust flange 40 and the drive hub 41, and the rocking plate 10 rocks with the rotation, and this rocking. As a result, the piston 7 reciprocates in the cylinder bore 6, and as a result the volume in the cylinder bore 6 changes, and due to this volume change, refrigerant gas is sucked in, compressed and discharged in sequence, and in accordance with the tilt angle of the oscillating plate 10. A volume of high pressure refrigerant gas is discharged.

That is, when the heat load is reduced and the pressure regulating valve 32 closes the communication passage 31 and the pressure in the crank chamber 8 is increased, the inclination angle of the oscillating plate 10 is reduced, which reduces the stroke amount of the piston 7. Therefore, the discharge capacity is reduced.

Further, since the refrigerant gas contains lubricating oil, the radial bearings 24, 26, 60 and the thrust bearings 25, 33, 61, 62 are lubricated, but at the time of low load or high speed operation. In the minimum discharge amount state such as time, the flow rate of the refrigerant gas decreases, so the supply amount of lubricating oil also decreases.

When the heat load increases and the pressure regulating valve 32 opens the communication passage 31 and the pressure in the crank chamber 8 decreases, the tilt angle of the oscillating plate 10 increases, which increases the stroke amount of the piston 7 and discharges it. Increased capacity.

Since the compression reaction force of the piston 7 is applied to the thrust roller bearing 33 by the operation of the compressor, a load in the thrust direction corresponding to the resultant force of the compression reaction force and the above-mentioned preload is applied to the thrust roller bearing 33. However, since the lubricating oil introducing grooves 51, 52 are inclined with respect to the rotation center axis of the needle roller 34 of the thrust roller bearing 33 as shown in FIG. 3, the lubricating oil introducing grooves 51, 52 and the thrust roller bearing 33 are Since the needle roller 34 crosses the needle roller 34, a part of the race 35 of the thrust bearing 33 is not depressed by the needle roller 34 into the lubricating oil introducing grooves 51, 52.

The refrigerant gas in the crank chamber 8 is oil-separated by the recesses 49, 50 of the front head 4, and the lubricating oil is passed through the lubricating oil introducing grooves 51, 52 of the race receiving surface 37 to supply the lubricating oil. A part of the lubricating oil supplied to the seal portion 55 through 53, 54 is provided through the openings 53a, 54a provided in the lubricating oil supply passages 53, 54, to the radial bearing 2.
6. Therefore, the sealing performance of the seal portion 55 is complemented, and the radial bearing 26 is lubricated and the thrust bearing 33 is cooled.

According to the oscillating plate type compressor of the first embodiment, the lubricating oil introducing grooves 51 and 52 and the thrust roller bearing 33 are provided.
Since the needle roller 34 crosses the needle roller 34, a part of the race 35 of the thrust bearing 33 does not sink (deform) into the lubricating oil introducing grooves 51, 52 by the needle roller 34 and faces the lubricating oil introducing grooves 51, 52. It is possible to prevent wear and seizure of a part of the race 35, and improve the durability of the thrust bearing 33.

FIG. 4 is a view showing the inner wall surface of the front head of the oscillating plate type compressor according to another embodiment of the present invention.
FIG. 7A is a diagram showing the inner wall surface of the front head of the oscillating plate compressor according to the second embodiment, and FIG. 7B is the inner wall surface of the front head of the oscillating plate compressor according to the third embodiment. FIG. 11C is a diagram showing the inner wall surface of the front head of the oscillating plate compressor according to the fourth embodiment. The same parts as those of the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

In the first embodiment described above, the lubricating oil introducing groove 5 is used.
1, 52 to the needle roller 3 of the thrust roller bearing 33
Inclining with respect to the rotation center axis of 4, the lubricating oil introducing grooves 51, 5
2 and the needle roller 34 of the thrust roller bearing 33 are crossed with each other, but in the second embodiment,
As shown in FIG. 4A, the lubricating oil introducing grooves 71, 72 are formed in a curved shape, and the starting end portions 71a, 72a of the lubricating oil introducing grooves 71, 72 are communicated with the lubricating oil supply holes 53, 54. The lubricating oil introduction grooves 71, 72 are arranged on the front side in the rotation direction of the shaft 5 with respect to the end portions 71b, 72b.

According to the second embodiment, the lubricating oil introducing groove 7
The direction of the starting end portions of 1, 72 is the thrust roller bearing receiving surface 37.
Since it approaches the tangential direction of the virtual circle formed by the outer peripheral edge of the, the lubricating oil easily enters the lubricating oil introduction grooves 71 and 72 when the shaft 5 rotates, and the seal chamber 68 and the bearing accommodating chamber 69 are lubricated and cooled. And are promoted.

In the third embodiment, as shown in FIG. 4 (b), approximately the middle portion of the lubricating oil introducing grooves 81, 82 is inclined at a predetermined angle with respect to the central axis of rotation of the needle roller 34 of the thrust roller bearing 33. It was

Even in this case, the same operational effect as that of the first embodiment can be obtained.

In the fourth embodiment, as shown in FIG. 4 (c), the lubricating oil introducing grooves 91 and 92 are formed in the thrust roller bearing 33.
At a predetermined angle with respect to the radial direction, the start end 91a of one of the lubricating oil introducing grooves 91 communicates with the lubricating oil supply hole 53, and the front side in the rotational direction of the shaft 5 with respect to the terminating end 91b of the lubricating oil introducing groove 91. The starting end portion 92a of the other lubricating oil introducing groove 92 is arranged rearward of the ending portion 92b of the lubricating oil introducing groove 92 communicating with the lubricating oil supply hole 54 in the rotational direction of the shaft 5. That is, with respect to the rotation direction of the shaft 5, one of the lubricating oil introducing grooves 91 is inclined in the direction in which the lubricating oil enters the lubricating oil introducing groove 91, and the other lubricating oil introducing groove 92 is inclined in the inclined direction. The lubricant was introduced from the lubricating oil introducing groove 92.

According to the fourth embodiment, the lubricating oil introducing groove 9
1. The lubricating oil that has entered the seal chamber 68 and the bearing accommodating chamber 69 from the lubricating oil supply hole 53 is discharged to the crank chamber 8 through the lubricating oil supply hole 54 and the lubricating oil introduction groove 92. The cooling effect of the bearing housing 69 is improved.

In each of the above-mentioned embodiments, the case where two lubricating oil introducing grooves are provided has been described, but the number of lubricating oil introducing grooves may be one or three or more.

[0047]

As described above, according to the oscillating plate compressor of the first aspect of the invention, the lubricating oil introduction groove intersects the roller of the thrust roller bearing, and a part of the race of the thrust roller bearing is the roller. Since it does not sink (deform) in the lubricating oil introducing groove, it is possible to prevent abrasion and seizure of a part of the race facing the lubricating oil introducing groove, and it is possible to improve the durability of the thrust roller bearing.

According to the oscillating plate compressor of the second aspect of the invention, the lubricating oil easily enters the lubricating oil introduction groove, and the lubrication and cooling of the sliding portion are promoted.

According to the oscillating plate compressor of the third aspect of the invention, the lubricating oil that has entered the sliding portion through one lubricating oil introduction groove is discharged into the housing through the other lubricating oil supply hole. Further, the cooling effect of the sliding portion by the lubricating oil is improved.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing a main part of an oscillating plate compressor according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing the entire oscillating plate compressor shown in FIG.

FIG. 3 is an end view of a front head of the oscillating plate compressor shown in FIG.

FIG. 4 is an end view of a front head of an oscillating plate compressor according to another embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a conventional rocking plate compressor.

6 is a diagram showing an inner wall surface of a front head of the oscillating plate compressor shown in FIG.

FIG. 7 is a cross-sectional view showing the relationship between the lubricating oil introduction groove on the race receiving surface of the inner wall surface of the front head and the needle roller of the needle roller thrust bearing.

[Explanation of symbols]

4 Front Head 5 Shaft 10 Swing Plate 33 Thrust Roller Bearing 37 Thrust Roller Bearing Receiving Surface 40 Thrust Flange 41 Drive Hub 51, 52, 71, 72, 81, 82, 91, 92 Lubricating Oil Introductory 53, 54 Lubricating Oil Supply Hole

Front Page Continuation (72) Inventor Kinno Ishida 39, Toyo-ji, Chiyo-ji, Konan-cho, Osato-gun, Saitama Prefecture Zexel Konan Factory

Claims (3)

[Claims] 1. A drive force transmitting member provided on a rotary shaft and rotatably supported on an inner wall surface of a housing via a thrust roller bearing; and a drive force transmitting member swingably attached to the drive force transmitting member. A swing plate that swings with the rotation of the force transmission member, a lubricating oil introduction groove that is provided on a thrust roller bearing receiving surface of the inner wall surface of the housing, and guides lubricating oil inside the housing, and the lubricating oil introduction groove In a oscillating plate compressor having a lubricating oil supply hole for supplying the lubricating oil introduced through the housing to the sliding portion of the rotary shaft, the lubricating oil introduction groove is formed in the roller of the thrust roller bearing. An oscillating plate compressor characterized by being non-parallel to the central axis of rotation. 2. A starting end portion of the lubricating oil introducing groove is located on a front side in a rotation direction of the rotary shaft with respect to an ending portion of the lubricating oil introducing groove communicating with the lubricating oil supply hole. The oscillating plate compressor according to claim 1. 3. The rotation direction of the rotating shaft is greater than the end portion of the lubricating oil introduction groove where the starting end portion of one lubricating oil introduction groove of the at least two lubricating oil introduction grooves communicates with the lubricating oil supply hole. Is located on the front side, and the starting end portion of the other lubricating oil introducing groove is located on the rear side in the rotation direction of the rotating shaft with respect to the ending portion of the lubricating oil introducing groove communicating with the lubricating oil supply hole. The oscillating plate compressor according to claim 1.