KR101299888B1 - Coaxial bearing assembly method for rotary compressor - Google Patents

Abstract

[assignment]
The present invention provides a method of assembling a bearing of a rotary compressor in a simple, high speed and high precision, and has little influence on the surrounding environment.
[Solution]
The bearing coaxial assembly method of the rotary compressor which concerns on this invention is related with the bearing coaxial assembly method of the rotary compressor which coaxially assembles a bearing without injecting oil into a rotary compressor, The main bearing is bolted to the work cylinder, After the bearing is clamped to the work cylinder with the bolt loosened to the work cylinder, the sub bearing is clamped, and the shaft is swung while pressing the sub bearing in the direction opposite to the eccentric direction of the shaft, and the shaft is synchronized with the swing of the sub bearing. It is characterized in that the approximate center of the main bearing is obtained by detecting the rotational trajectory of the sub bearing by using the position sensor, and the center of the sub bearing is careful with the approximate center of gravity.

Description

COAXIAL BEARING ASSEMBLY METHOD FOR ROTARY COMPRESSOR}

This invention relates to the bearing coaxial assembly method of a rotary compressor. More specifically, the present invention relates to a bearing coaxial assembly method of a rotary compressor, which can be carried out simply, at high speed and with high precision, without oil being injected into two bearings in a rotary compressor assembling step. Moreover, it is related with the rotary compressor assembled by the bearing coaxial assembly method of the said rotary compressor. Moreover, it is related with the bearing coaxial assembly apparatus of a rotary compressor.

In general, two bearings supporting the crankshaft of a rotary compressor generally use journal bearings as bearings because of the large radial load on the bearings. If the bearing centers of these two journal bearings do not coincide, the mechanical losses in the bearings will increase, leading to deterioration in the performance of the rotary compressor, and in the worst case will lead to a serious accident of burn-in of the bearings. There is a possibility. In addition, matching the two bearing centers with high accuracy can reduce the mechanical loss of the bearing portion and improve the performance of the rotary compressor. Therefore, it is necessary to carefully assemble the bearings so that the shaft centers of the two bearings coincide with high precision.

Conventionally, the bearing guarding apparatus which assembled the rotary compressor by the process shown below is proposed (for example, refer patent document 1).

(1) The main bearing clamp mechanism is provided by storing the eccentric portion of the crankshaft in which the roller is fitted in the cylinder, arranging the main bearing and the sub bearing on both ends thereof, placing the assembled assembly on the installation target, and operating the air cylinder. Fix the main bearing to the mounting table;

(2) the eccentric balance weight is installed at the lower end of the crankshaft in phase in the same direction as the eccentric direction of the eccentric to the axial center of the crankshaft;

(3) connect the lower end of the crankshaft with the coupling;

(4) Next, drive the motor and rotate the crankshaft;

(5) Because of the influence of the centrifugal force on the eccentric balance weight, the crank shaft is inclined and shakes in the opposite direction to the eccentric direction of the eccentric portion with respect to the main bearing, so the sub-bearings draw a circular trajectory into a horizontal plane perpendicular to the axial center of the crank shaft. Do the rocking exercise. The trajectory of the sub-bearing at this time is measured and stored by the sub-bearing measuring instrument;

Calculates the center O of the circular trajectory (6) memorized;

(7) Next, stop the motor;

(8) actuate the actuator and the back pressure adding mechanism and position the sub-bearings in the position O;

(9) actuate the sub-bearing pressurizing mechanism and pressurize the sub-bearing;

(10) Operate the bolt fixing mechanism and fix the sub bearing to the cylinder.

[Prior Art Literature]

[Patent Document 1]

Japanese Patent No. 2858547

The bearing guarding apparatus of the said patent document 1 injects oil into the inside of a workpiece | work, especially a bearing part, in order to rotate a shaft (crankshaft) at high speed at the time of assembly. The oil adheres not only to the inside of the workpiece but to the outer periphery when the high speed rotation is made. At this time, when the foreign matter adheres to the jig carrying the work, the foreign matter may adhere to the work and intrude into the inside of the work. If foreign matter enters the inside of the workpiece, the compressor may not rotate smoothly in the manufacturing process or cause vibration increase.

Moreover, in the model which assembled by making the clearance gap between the inside of a work cylinder and a rolling piston small, there exists a subject that a coaxial shift | offset | difference occurs without a fluctuation position obtained correctly under the influence of the oil film reaction force of oil.

In addition, also in the maintenance work surface, the said conventional bearing guarding apparatus has many components, and it takes time to understand the whole apparatus, and the person who can carry out maintenance etc. is limited, and much time is required for maintenance work, too did.

Since the conventional bearing guard uses oil, it is necessary to attach an oil sump to the pallet on a conveyor, and the environment around a work place is also worsened. In addition, when the work after assembly is reused for some reason, it is necessary to wash the work once and remove the oil adhering to the work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is a simple, high-speed, high-precision assembly, and a bearing coaxial assembly method of a rotary compressor with little influence on the surrounding environment, and a coaxial bearing of a rotary compressor and a rotary compressor. Provide an assembly device.

The bearing coaxial assembly method of the rotary compressor which concerns on this invention is a bearing coaxial assembly method of the rotary compressor which coaxially assembled the bearing without injecting oil into a rotary compressor, The main bearing is bolted to a work cylinder, After clamping the sub-bearing with respect to the temporarily fixed work in the state where the bolt is loosened to the work cylinder, the sub-bearing is rotated while pressing the sub-bearing in the direction opposite to the eccentric direction of the shaft, and the shaft is rotated in synchronism with the swing of the sub-bearing. It is characterized in that the approximate center of gravity of the main bearing is obtained by detecting the rocking trajectory of the sub bearing with the position sensor, and the center of the sub bearing is careful with the approximate center of gravity.

In the coaxial assembly method of the bearing of the rotary compressor according to the present invention, after the main bearing is bolted to the work cylinder and the sub bearing clamps the sub bearing with respect to the work temporarily fixed in a state where the bolt is loosened to the work cylinder, Rotate the sub-bearing in the opposite direction to the eccentric direction of the shaft, rotate the shaft in synchronization with the sub-bearing swing, and obtain the approximate center of gravity of the main bearing by detecting the swing trajectory of the sub-bearing. By paying attention to the approximate center of gravity of the sub-bearings, oil is required to perform high-precision assembly in the past, but coaxial assembly of bearings can be performed without oil, and conventional work cylinders that could not be assembled with high precision are It can be assembled also about the workpiece | work where the clearance gap between an inside and a rolling piston is small. The quality of a rotary compressor can be improved by performing coaxial assembly by the bearing coaxial assembly method of this rotary compressor.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows Embodiment 1 and is a longitudinal cross-sectional view of the single cylinder type workpiece | work 10. FIG.
2 is a sectional view taken along line XX of FIG.
Fig. 3 is a diagram showing Embodiment 1 and a longitudinal cross-sectional view of twin cylinder type work 25;
4 is a front view of a bearing coaxial assembly device 200, showing a first embodiment.
FIG. 5: is a figure which shows Embodiment 1, and is a side view of the bearing coaxial assembly apparatus 200. FIG.
Fig. 6 is a diagram showing Embodiment 1 and is a plan view of XY stage 55;
FIG. 7 is a diagram showing a first embodiment, and is a sectional view of the workpiece fixing part 35; FIG.
FIG. 8 is a diagram showing a first embodiment and a plan view of the sub-bearing clamp 99; FIG.
FIG. 9 is a diagram showing a first embodiment, and a sectional view of the sub bearing clamp 99; FIG.
FIG. 10 is a diagram showing Embodiment 1, showing an electrical wiring diagram of a bearing coaxial assembly apparatus 200. FIG.
FIG. 11 is a diagram showing a first embodiment, showing the trajectory of the bearing coaxial assembly device 200. FIG.
FIG. 12 is a view showing Embodiment 1, illustrating an operation flowchart of a bearing coaxial assembly apparatus 200. FIG.

Embodiment Mode 1.

1 to 12 show a first embodiment, FIG. 1 is a longitudinal cross-sectional view of a single cylinder type work 10, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is a longitudinal cross section of a twin cylinder type work 25. 4 is a front view of the bearing coaxial assembly apparatus 200, FIG. 5 is a side view of the bearing coaxial assembly apparatus 200, FIG. 6 is a plan view of the XY stage 55, FIG. 8 is a plan view of the sub-bearing clamp 99, FIG. 9 is a sectional view of the sub-bearing clamp 99, FIG. 10 is an electrical wiring diagram of the bearing coaxial assembly apparatus 200, FIG. 11 is a bearing coaxial assembly apparatus 200 The figure which shows the locus | trajectory of FIG. 12 is an operation flowchart of the bearing coaxial assembly apparatus 200. As shown in FIG.

The single cylinder type work 10 is demonstrated with reference to FIG. The single-cylindrical type work 10 is a piston which fits in the inner space of the work cylinder (A) 2 at least in the eccentric part 6c of the shaft (A) 6, and the outer periphery of the eccentric part 6c (( A) 7) is stored. The axial ends of the work cylinder (A) 2 are closed by the work bearing (A) 1 (bearing) and the work bearing (B) 4 (bearing). In the final stage (product) in which assembly is completed, the work bearing (A) 1 and the work bearing (B) 4 are fixed to the work cylinder (A) 2 with bolts 5 and 9, respectively. do.

The work bearing (B) 4 supports the main shaft 6a of the shaft (A) 6, and the work bearing (A) 1 supports the minor shaft 6b of the shaft (A) 6.

In the single cylinder type workpiece 10 (work) that is the target of the bearing coaxial assembly device 200, although the work bearing (B) 4 is fixed to the work cylinder (A) 2, the work bearing ((A 1) is temporarily fixed to the work cylinder (A) 2 in the state in which the some bolt 5 was loosened.

That is, in FIG. 1, the work cylinder (A) 2 and the work bearing (B) 4 are compressed between the piston (A) 7 and the work cylinder (A) 2 in one circumferential direction. The plurality of bolts 9 are arranged so that the seal gap (A) 3 has a predetermined dimension A, which is a design specification, in the axial direction corresponding to the eccentric portion 6c of the shaft (A) 6. It is fixed by.

The circumferential one direction is a direction in which the compression chamber gap (A) 3 becomes the minimum gap (7 to 26 micrometers) in the range of about 90 degrees in front of the discharge port (not shown). It is about.

By doing in this way, the COP (performance factor) of a compressor improves.

By measuring the dimensions of the work cylinder (A) 2 and the shaft (A) 6 to which the work bearing (B) 4 is fixed, the piston (A) 7 and the work cylinder ( Compression chamber gap (A) 3 between (A) 2) is a predetermined dimension (A) which is a design specification in the axial range corresponding to the eccentric portion 6c of the shaft (A) 6. Check if it is When the compression chamber gap (A) 3 does not become the predetermined dimension (A), it adjusts with the some bolt 9 so that it may become the predetermined dimension (A).

Also, the main shaft 6a of the shaft (A) 6 is inserted into the work cylinder (A) 2 to which the work bearing (B) 4 is fixed, and also into the work bearing (B) 4. do.

Moreover, the piston (A) 7 is fitted to the eccentric part 6c of the shaft (A) 6.

In addition, the work bearing (A) 1 is inserted into the sub shaft 6b of the shaft (A) 6. The work bearing (A) 1 is temporarily fixed to the work cylinder (A) 2 in a state where the plurality of bolts 5 are loosened. The single cylinder type work 10 in this state is inserted into the bearing coaxial assembly apparatus 200.

That is, although the work bearing (B) 4 is being fixed to the work cylinder (A) 2, the work bearing (A) 1 is temporarily fixed to the work cylinder (A) 2.

FIG. 2 is a sectional view taken along line XX of FIG. 1, wherein the joint surface between the work bearing (A) 1 and the work cylinder (A) 2 of the single cylinder type work 10 is cut off at the work bearing (A) 1 side. This is the figure. As shown in FIG. 2, the work cylinder (A) 2 has a compression chamber 2a (space) having a substantially circular shape in its entire shape and having a circular cross section at its central portion.

In the compression chamber 2a, the piston (A) 7 fitted to the eccentric part 6c of the shaft (A) 6 is accommodated. In the work cylinder (A) 2, the vane 27 which is arrange | positioned freely in the radial direction and is normally pressed by the piston (A) 7 by the spring which is not shown in figure is provided, and the compression chamber 2a is provided. It is divided into low pressure side and high pressure side. In addition, a suction port 2b is formed in the work cylinder (A) 2 to communicate with the low pressure side of the refrigerant circuit.

In addition, in the work cylinder (A) 2, the bearing coaxial assembly device 200 uses a phase determination hole (A) 26 and a phase which are used to determine the phase between the device and the work cylinder (A) 2. Crystal hole (B) 28 is drilled.

Next, the twin cylinder type work 25 (work) is described. In FIG. 3, the work cylinder (C) 17 (cylinder) and the work bearing (D) 20 (bearing) are the work cylinder (A) 2 of the single cylinder type work 10, and the work bearing ( In the same manner as in (B) 4), the plurality of bolts 24 are fixed.

In addition, the work cylinder (B) 12 (another work cylinder) and the work bearing (C) 11 (bearing) also have a work cylinder (A) 2 and a work bearing (( In the same manner as B) 4), the plurality of bolts 22 are fixed.

The assembling procedure of the twin cylinder type work 25 is demonstrated.

(1) The work cylinder (C) 17 and the work bearing (D) 20 are fixed with the some bolt 24 as mentioned above.

(2) The work cylinder (B) 12 and the work bearing (C) 11 are fixed with the some bolt 22 as mentioned above.

(3) The main shaft 21a of the shaft (B) 21 is inserted into the work bearing (D) 20 on the work cylinder (C) 17 side. Next, the piston (C) 19 passes through the sub shaft 21b, the eccentric portion 21d (the sub shaft 21b side), and the intermediate shaft 21e in the order of the eccentric portion 21c (the main shaft 21a). ) To the side).

(4) The plate 15 is made to pass through the sub-axis 4b and the eccentric portion 21d (the sub-axis 21b side), and is assembled to the intermediate shaft 21e. In this state, since only the plate 15 has penetrated in the axial direction, the center of the plate 15 and the center of the work cylinder (C) 17 do not coincide.

(5) The plate 15 is moved in the direction perpendicular to the axial direction, and set so as to be centered with the work cylinder (C) 17.

(6) The piston (B) 14 is made to pass through the sub-axis 21b, and then inserted into the eccentric portion 21d (the sub-axis 21b side).

(7) The work cylinders (B) 12 and the work bearings (C) 11 fixed with a plurality of bolts 22 are inserted into the pistons (B) 14 and the subshaft 21b, respectively.

(8) Finally, the work cylinder (B) 12 is temporarily fixed by inserting the plate 15 in a state where the plurality of bolts 23 are loosened to the work cylinder (C) 17. In this state, the twin cylinder type work 25 is inserted into the bearing coaxial assembly apparatus 200.

Next, the structure of the bearing coaxial assembly apparatus 200 is demonstrated. Hereinafter, the bearing coaxial assembly apparatus 200 may only be called an apparatus.

In FIG. 4, the jig | tool part 29 in which the twin cylinder type workpiece | work 25 was inserted in the apparatus center part is fixed to the base plate 30 by the some bolt 31. As shown in FIG.

The base plate 30 is mounted on the mount 32, and is fixed with a plurality of bolts 33.

As for the mount 32, the some adjustment bolt 34 is attached to the bottom part, and the adjustment bolt 34 receives the weight of the whole apparatus.

In the base plate 30, the work fixing part 35 is centered.

Moreover, below the base plate 30, the hexagonal support 36 for suspending the motor base 37 exists, and is fixed by the some bolt 38 and the bolt 39. As shown in FIG.

A plurality of hexagonal struts 41 are fixed to the bottom of the motor base 37 with a plurality of bolts 40, and a motor 42 is fixed to the plurality of bolts 43 under the hexagonal struts 41.

The coupling 44 is fixed to the shaft 42a of the motor 42, and the shaft 45 is similarly fixed to the opposite side of the coupling 44.

In the middle of the shaft 45, a pulley 46, which can be fixed by a wedge mechanism, is fixed. The rotation force of the motor 42 is transmitted to the pulley 57 using the belt 56.

The pulley 57 is fixed to the shaft 58 by the wedge mechanism.

The shaft 58 is a bearing unit 60 fixed to the motor base 37 with the bolt 65 to suppress the shaking of the shaft 58 and is fixed with the nut 59 so that the shaft 58 does not fall. have.

The upper part of the shaft 58 has the clamp 62 fixed with the bolt 61, and the some processus | protrusion 64 is fixed with the bolt 63. As shown in FIG.

To prevent the shaft 45 fixed to the coupling 44 from falling, the bearing unit 48 fixed to the motor base 37 with the bolt 66 is tightened with the nut 47.

The upper portion of the shaft 45 is fixed to the eccentric plate 50 with a nut 49, and the anti-vibration rubber 52 which is deliberately eccentric to the eccentric plate 50 to generate a transverse load is applied to the bolt 51. Is fixed.

The upper and lower centers of the anti-vibration rubber 52 are eccentrically fixed and always press force of the XY stage 55 in the eccentric direction of the center below the anti-vibration rubber 52.

When the eccentric plate 50 rotates, the force which pushes the XY stage 55 in the eccentric direction of the center below the anti-vibration rubber 52 always generate | occur | produces. You can swing it.

For example, when the single cylinder type work 10 is set in the apparatus, the eccentric part 6c of the shaft (A) 6 with respect to the eccentric direction (about) of the center below the anti-vibration rubber 52 Adjust so that is in the opposite direction. The reason will be described later.

The anti-vibration rubber 52 uses the shock absorbing material which suppressed vibration. For example, natural rubber, chloroprene rubber and silicone. The hexagonal strut 53 is fixed to the anti-vibration rubber 52, and the upper portion of the hexagonal strut 53 is fixed to the XY stage 55 with a bolt 54, and transmits a lateral load to the XY stage 55. .

The bearing 140 which supported the rotation of the anti-vibration rubber 52 is provided in the root of the hexagonal strut 53.

Although FIG. 5 is a side view of the bearing coaxial assembly apparatus 200, the control panel 67 is located in the lower part of the apparatus, the breaker 69 which cuts off an overcurrent in the control panel 67, and the sequence controller 68 which performed the apparatus control and calculation. Is being stored. The control panel 67 is fixed to the mount 32 with a plurality of bolts 70.

6 is a plan view of the XY stage 55, and two Y-axis rails 71 are fixed to the base plate 30 with a plurality of bolts 72.

Two Y blocks 73 are fixed to the Y-axis rail 71 by a plurality of bolts 74, and the Y-axis base 75 operates only on the Y-axis.

In order to drive the Y-axis base 75 to the Y-axis, the Y-axis ball screw block 79 and the Y-axis base 75 are fixed with the Y-axis clutch 80. When the Y-axis clutch 80 is opened, the Y-axis base 75 is free in the Y-axis direction. The Y-axis ball screw block 79 serves to change the rotational motion of the Y-axis ball screw 78 into a linear motion.

The Y-axis ball screw 78 is fixed to the Y-axis support block ((A) 76) and the Y-axis support block ((B) 81), and the Y-axis support block ((A) 76) is provided with a plurality of bolts ( At 77, the Y-axis support block (B) 81 is fixed to the base plate 30 with a plurality of bolts 82. The Y-axis ball screw 78 is connected to the Y-axis motor 84 by the Y-axis coupling 83.

Two X-axis rails 85 are fixed to the Y-axis base 75 with a plurality of bolts 86. Two X blocks 87 are fixed to the X axis rail 85 by a plurality of bolts 88, and the X axis base 89 operates only on the X axis.

In order to drive the X-axis base 89 to the X-axis, the X-axis ball screw block 93 and the X-axis base 89 are fixed with the X-axis clutch 94.

When the X-axis clutch 94 is opened, the X-axis base 89 is free in the X-axis direction.

The X-axis ball screw block 93 has a role of changing the rotational motion of the X-axis ball screw 92 into a linear motion.

The X-axis ball screw 92 is fixed by the X-axis support block ((A) 90) and the X-axis support block ((B) 95), and the X-axis support block ((A) 90) is provided with a plurality of bolts ( At 91, the X-axis support block (B) 95 is fixed to the Y-axis base 75 with a plurality of bolts 96.

The X-axis ball screw 92 is connected to the X-axis motor 98 by the X-axis coupling 97. The subsidiary bearing clamp 99 is in the X-axis base 89.

The position sensor 105 for measuring the position of the workpiece is fixed to the sensor holder 104 with a bolt 106. The sensor holder 104 is attached to the tip of the cylinder 103, and when the workpiece is attached or detached, the cylinder 103 retreats and moves forward when the position is measured.

The cylinder 103 is fixed to the bracket 100 with a plurality of bolts 102. The bracket 100 is fixed to the base plate 30 with a plurality of bolts 101.

7 shows the work fixing part 35, and the twin cylinder type work 25 is in a clamped state. The twin cylinder type work 25 is phase-determined by the two phase determination pin 113. As shown in FIG. The phase determination pin 113 is fixed to the jig part 29 with the bolt 114. The jig portion 29 is fixed to the base plate 30 by a plurality of bolts 31.

The twin cylinder type work 25 is fitted to the jig part 29 by the clamp bar 108. As shown in FIG. The clamp bar 108 is fixed to the cylinder 109 with a bolt 107. The cylinder 109 is fixed to the base plate 30 by the some bolt 110. The cylinder 109 is a clamp cylinder capable of both rotation and a clamp.

8 is a plan view of the sub-bearing clamp 99. The clamp 123 clamps the work bearings (single-cylindrical workpiece 10 and twin-cylindrical workpiece 25) (work bearing (A) 1 and work bearing (C) 11) from both sides. The clamp 123 restricts the shaking by the guide 117 and moves back and forth by the cylinder 115. The cylinder 115 is fixed by a plurality of bolts 116, and the guide 117 is A plurality of bolts 118 are fixed to the X-axis base 89.

The clamp 123 is fixed with a wedge 122 to suppress backlash during clamping. The wedge 122 is moved back and forth by the cylinder 119 and is fixed by the nut 121. The tip of the wedge 122 is tapered and enters the clamp 123 obliquely when advancing. The cylinder 119 is fixed to the X-axis base 89 by the some bolt 120.

9 is a cross-sectional view of the sub-bearing clamp 99. The guide 117 may include a guide restricting portion 124 and a guide lid 125, and a gap 126 may be formed between the guide 117 and the clamp 123 when assembled. The gap 126 is in the upper part, but the upper part of the wedge 122 is tapered before the clamp 123 clamps the sub-bearings (work bearing ((A) 1) and work bearing ((C) 11)). The clamp 123 and the sub-bearings (work bearing ((A) 1) and work bearing ((C) 11)) are fixed in a slightly raised state by putting the wedge 122 under the clamp 123. do.

10 is an electrical wiring diagram of the bearing coaxial assembly apparatus 200. Pass the breaker 69 and power is supplied to the sequence controller 68. In the sequence controller 68, a calculation program is incorporated, and an output unit which sends a signal to the sequence controller CPU 130 which performed numerical calculation, the input unit 131 which received the signal of the sensor 135, and the air valve 137. 132, AD conversion in which analog data of the motor controller 133 and the position sensor 105 that control the respective motor amplifiers 136 of the Y-axis motor 84 and the X-axis motor 98 are converted into digital data. The unit 134 is being assembled. The device is operated in a program incorporated in the sequence controller CPU 130 based on the data input from each unit.

11 is a trajectory graph showing the movement of the sub-bearings (work bearing (A) 1 and work bearing (C) 11) measured by the position sensor 105. The point of continuous change measured by the position sensor 105 is used as the locus line 127, and the approximate circle 128 is calculated from the locus line 127 to obtain the approximate circle center 129.

Next, the operation will be described with reference to the flowchart of FIG. The bearing coaxial assembly apparatus 200 comprised as mentioned above is supplied to the apparatus in the state which the single cylinder type workpiece | work 10 or the twin cylinder type workpiece | work 25 was temporarily assembled.

Here, the single cylinder type work 10 is demonstrated as an example. Regarding the supply of the workpiece, it may be a human or a robot.

The single cylinder type work 10 is placed on the jig 29, and the phase determining holes (A) 26 and the phase determining holes (B) 28 of the work cylinder (A) 2 are provided with two phase determining pins. Inserted into 113 (S10).

When the single-cylinder type work 10 is set in the apparatus, the eccentric portion 6c of the shaft (A) 6 has the opposite direction with respect to the eccentric direction of the lower center of the anti-vibration rubber 52 (above). Adjust if possible.

The work cylinder (A) 2 is clamped and fixed with a plurality of clamp bars 108 (S11).

Next, after fixing the work bearing (A) 1 (part bearing) with the plurality of clamps 123 (S12), the plurality of wedges 122 are advanced to fix the clamp 123, and at the same time, the work bearings (A) 1) (S13). Until this time, the Y-axis clutch 80 and the X-axis clutch 94 are fixed, but are changed to the open state here.

The shaft (A) 6 is fixed with a plurality of protrusions 64 (S14), and the rotation of the work bearing (A) 1 and the rotation of the shaft (A) 6 by rotating the motor 42. The operation is performed in synchronization with (S15). At this time, the rocking speed of the work bearing (A) 1 and the rotational speed of the shaft (A) 6 are, for example, the rocking speed of the work bearing (A) 1 is 2 rpm (week / second), The rotation speed of the shaft (A) 6 is 120 rpm, and the rotation of the work bearing (A) 1 and the rotation of the shaft (A) 6 are synchronous.

If the load in the lateral direction generated by eccentricity of the upper and lower centers of the anti-vibration rubber 52 acts on the XY stage 55, when the single-cylindrical type work 10 is set in the device, the anti-vibration rubber 52 is lowered in advance. Since the eccentric part 6c of the shaft (A) 6 is adjusted in the opposite direction with respect to the direction of the center of the (about), the load in the lateral direction of the anti-vibration rubber 52 is applied to the XY stage 55. It applies to the X-axis base 89, and presses the workpiece bearing (A) 1 in the opposite direction to the eccentric part 6c of the shaft (A) 6.

The lateral load of the anti-vibration rubber 52 is applied to the work bearing (A) 1 as shown by the arrow of FIG. 1, and the force is the eccentric portion 6c side of the minor axis 6b of the shaft (A) 6. Acts at the source of (h). Therefore, the shaft (A) 6 is pressed so as to incline to the side opposite to the eccentric direction of the eccentric part 6c. Therefore, in the compression chamber gap (A) 3 which is the minimum gap, the inner peripheral surface of the piston (A) 7 and the work cylinder (A) 2 do not contact.

In addition, since the X-axis base 89 of the XY stage 55 is in a free state, and the Y-axis base 75 on which the X-axis base 89 is placed is also in a free state, it is temporarily fixed to the bolt 5. In the movable range of the prepared work bearing (A) 1, it moves to the direction (outer side) in which the lateral load of the anti-vibration rubber 52 acts.

By rotating the eccentric plate 50 by the motor 42, the position in the circumferential direction to which the work bearing (A) 1 moves by the lateral load of the anti-vibration rubber 52 changes every time. In other words, the work bearing (A) 1 swings.

At this time, anti-vibration rubber acting on the work bearing (A) 1 by synchronizing (coordinating) the swing of the work bearing (A) 1 with the shaft (A) 6 by rotating the motor 42. The direction of the lateral load of (52) becomes the opposite direction of the eccentric part 6c, and in the compression chamber gap (A) 3 which is a minimum gap, the piston (A) 7 and the work cylinder ((A) 2 The inner circumferential surface of) can be kept out of contact.

The position of the workpiece bearing (A) 1 is measured by the plurality of position sensors 105, and data of the locus line 127 is taken (S16). The data of the locus line 127 takes data of 500 points, for example.

The standard deviation of the difference from the approximate circle of the data of each point determines whether or not the data of the swinging locus circle (trajectory line 127) has no problem (S17). For example, if the standard deviation is 2 to 3 micrometers or less, it is OK.

When the data of the swinging locus circle is OK, the approximate circle 128 and the approximate circle center 129 are obtained from the data of the locus line 127 by the least square method (S18).

The Y-axis clutch 81 and the X-axis clutch 94 are fixed, and the center of the work bearing (A) 1 is approximated by using the X-axis motor 98 and the Y-axis motor 84. Be careful) (S19).

After the center of the work bearing (A) 1 is careful with the approximate center of gravity 129, the bolt 5 is fixed (S20) and the position deviation is confirmed (S21). If the position deviation is within the prescribed value, the clamp is returned to end (S22).

By fixing the bolt 5, the work bearing (A) 1 may be out of position. The prescribed value of position deviation is 2 micrometers or less, for example.

If there is a problem with the swinging trajectory member, retries are performed up to three times (S23). In the case of three or more times, after the clamp is returned and terminated, abnormality display is performed (S24).

If there is a problem due to the deviation of the tightening position, retries are performed up to two times (S25). If there are two or more times, the clamp is returned after the termination and abnormality is displayed (S26).

The roots of the sub-axis 6b of the work bearing (A) 1 and the shaft (A) 6 are normally in contact and sliding to one place (for example, the point h in FIG. 1), but the shaft ((A 6) is rotated at low speed (e.g., 120 rpm), so no oil injection is necessary.

Since the operation is performed by synchronizing the swing of the work bearing (A) 1 and the rotation of the shaft (A) 6, the inner circumferential surface of the piston (A) 7 and the work cylinder (A) 2 are not in contact with each other. The work bearing (A) 1 can be rocked while keeping it in a closed state.

Conventionally, although oil was required to perform high precision assembly, the bearing coaxial bearing assembly device 200 of the rotary compressor of this embodiment can coaxially assemble without oil, and has not been able to assemble with high precision in the past. The single-cylinder type workpiece | work 10 with a small clearance between the inside of (A) 2 and the piston (A) 7 can also be assembled. The same applies to the twin cylinder type work 25.

By performing coaxial assembly with the bearing coaxial assembly apparatus 200 of this embodiment, the quality of a rotary compressor can be improved.

1: Work bearing (A)
2: work cylinder (A)
2a: compression chamber
2b: inlet
3: compression chamber gap (A)
4: work bearing (B)
5: bolt
6: shaft (A)
6a: spindle
6b: minor shaft
6c: eccentric
7: piston (A)
8: maximum gap of compression chamber (A)
9: bolt
10: single cylinder type work
11: work bearing (C)
12: work cylinder (B)
14: piston (B)
15: Plate
16: shaft gap
17: work cylinder (C)
19: piston (C)
20: work bearing (D)
21: shaft (B)
21a: spindle
21b: minor shaft
21c: eccentric
21d: eccentric
21e: middle axis
22: Bolt
23: Bolt
24: Bolt
25: twin cylinder type work
26: phase determination hole (A)
27: Vane
28: phase determination hole (B)
29: jig
30: base plate
31: Bolt
32: trestle
33: Bolt
34: adjusting bolt
35: work fixing part
36: hexagonal post
37: motor base
38: Bolt
39: bolt
40: Bolt
41: hexagonal post
42: motor
42a: axis
43: Bolt
44: coupling
45: axis
46: Pulley
47: Nut
48: bearing unit
49: nuts
50: eccentric plate
51: Bolt
52: dustproof rubber
53: hexagonal post
54: Bolt
55: XY stage
56: belt
57: pulley
58: axis
59: Nuts
60: bearing unit
61: Bolt
62: clamp
63: Bolt
64: projection
65: bolt
66: Bolt
67: control panel
68: sequence controller
69: Breaker
70: bolt
71: Y axis rail
72: Bolt
73: Y block
74: bolt
75: Y axis base
76: Y axis support block (A)
77: Bolt
78: Y axis ball screw
79: Y axis ball screw block
80: Y axis clutch
81: Y axis support block (B)
82: Bolt
83: Y axis coupling
84: Y axis motor
85: X axis rail
86: Bolt
87: X block
88: Bolt
89: X axis base
90: X axis support block (A)
91: Bolt
92: X axis ball screw
93: X axis ball screw block
94: X axis clutch
95: X axis support block (B)
96: Bolt
97: X axis coupling
98: X axis motor
99: vice bearing clamp
100: Bracket
101: bolt
102: bolt
103: cylinder
104: sensor holder
105: position sensor
106: Bolt
107: Bolt
108: Clamp Bar
109: cylinder
110: Bolt
113: phase determination pin
114: Bolt
115: cylinder
116: Bolt
117 Guide
118: Bolt
119: Cylinder
120: bolt
121: Nut
122: wedge
123: Clamp
124: guide regulation
125: guide lid
126: gap
127: track line
128: approximation
129: approximation center
130: sequence CPU
131: input unit
132: output unit
133: motor controller
134: AD conversion unit
135 sensor
136: motor amplifier
137: air valve
140: bearing
200: bearing coaxial assembly device.

Claims (7)

In the bearing coaxial assembly method of a rotary compressor which coaxially assembles a bearing without injecting oil into a rotary compressor,
After the main bearing is bolted to the work cylinder and the work bearing to which the sub-bearing or another work cylinder to which the sub-bearing is fixed is temporarily fixed with the bolt loosened to the work cylinder, the dust is clamped after the sub-bearing is clamped. While using the rubber while rocking the sub-bearing in the direction opposite to the eccentric direction of the shaft,
Rotate the shaft in synchronization with the swing of the sub-bearing,
And detecting an approximate center of gravity of the oscillation trajectory of the sub-bearing by detecting the oscillation trajectory of the sub-bearing, and paying the center of the sub-bearing to the approximate center of gravity. The method of claim 1,
When the sub-bearing is clamped, the sub-bearing is lifted from the work cylinder, or another work cylinder on which the sub-bearing is fixed is lifted from the plate. 3. The method according to claim 1 or 2,
A method for assembling a bearing of a rotary compressor, characterized in that the position of the sub-bearing is measured by at least two orthogonal position sensors. The method of claim 3, wherein
A method for assembling a bearing of a rotary compressor, comprising: calculating an approximate circle by a least square method from the locus line data measured by the position sensor, and calculating the approximate circle center by calculation. 5. The method of claim 4,
And determining the locus line data based on a standard deviation of the difference between the approximation circle of the locus line data obtained by measuring the fluctuation of the sub-bearing by the position sensor. delete delete

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