JPH06159262A - Assembly device for compressor - Google Patents

Abstract

PURPOSE:To make the gap between a stator and a rotor uniform even though the dimensional accuracy of a barrel casing is low during an assembly of a scroll compressor or the like adapted to be used in an air-conditioner. CONSTITUTION:The center of a stator 2 in a barrel casing 1 is aligned with the center of a bearing 5, and is welded thereto by means of a first bearing assembling machine A. A crankshaft 5 on which a stator 3 is fitted, is inserted in the center part of the barrel casing 1 by means of a crankshaft assembling machine B. The center of the bearing 5 is aligned with the center of a bearing 6, and the bearing 6 is welded to the barrel casing 1 by a second assembling machine C. Accordingly, it is possible to obtain a compressor in which a the stator 2, the bearing 5 and the bearing 6 are coaxial with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor assembling apparatus used for assembling a scroll compressor used in, for example, an air conditioner.

[0002]

2. Description of the Related Art As shown in FIG. 4, a scroll compressor used in an air conditioner has a body casing 1, a stator 2, a rotor 3, a crankshaft 4, an upper bearing 5 and a lower bearing 6 as main constituent elements. There is. The stator 2 is fixed to the inside of the body casing 1 by shrink fitting or the like. The rotor 3 is fixed to the outside of the crankshaft 4 by press fitting or the like, and is inserted inside the stator 2 with a predetermined gap. The upper bearing 5 and the lower bearing 6 are fixed in both ends of the body casing 1, and rotatably support the crankshaft 4.

Such a scroll compressor is usually assembled by the procedure shown in FIG. The body casing 1 in which the stator 2 has been inserted is turned upside down, and the upper bearing 5 is fixed in the lower end portion by welding. After inserting the rotor 3 into the crankshaft 4, the crankshaft 4 is inserted into the center of the body casing 1, and the lower end of the crankshaft 4 is inserted into the upper bearing 5. The lower bearing 6 is inserted into the upper end of the body casing 1, the upper end of the crankshaft 4 is passed through the lower bearing 6, and the lower bearing 6 is fixed by welding. The upper bearing 5 and the lower bearing 6 are both based on the inner surface of the body casing 1
Attached to.

[0004]

According to such an assembly, when the body casing is formed into a perfect cylinder, the centers of the bearings 5 and 6 coincide with the center of the body casing 1, and the stator 2 and the rotor are aligned. The gap of 3 becomes uniform. However, in recent compressors, the manufacturing method of the body casing 1 is simplified for cost reduction, and it is considered that the body casing 1 is manufactured by rolling a flat plate. The body casing 1 manufactured in this manner has poor dimensional accuracy, and if the bearings 5 and 6 are directly assembled to the body casing 1, the bearings 5 and 6 are
Is deviated from the center of the stator 2, and the gap between the stator 2 and the rotor 3 becomes non-uniform, so that the compressor performance is significantly deteriorated. Therefore, the fuselage casing 1 having low dimensional accuracy cannot be used, which hinders cost reduction of the compressor.

An object of the present invention is to provide a compressor assembling apparatus capable of maintaining the uniformity of the gap between the stator and the rotor even when the dimensional accuracy of the body casing is low.

[0006]

SUMMARY OF THE INVENTION A compressor assembly apparatus according to the present invention includes a first bearing assembly machine for mounting one bearing in one end of a body casing in which a stator is inserted, and the installation of one bearing. A second bearing assembly machine for mounting the other bearing in the other end of the body casing in which the crankshaft to which the rotor has been inserted is inserted in the center part, and the first bearing assembly machine includes one bearing A bearing positioning mechanism that fixes the center of the assembly to the assembly position, a body positioning mechanism that fixes the body casing in which the stator is inserted to the assembly position with the inner surface of the stator as a reference, and an outer periphery of the body casing that is fixed to the assembly position. And a welding mechanism for welding the body casing to one of the bearings from a plurality of positions on the side, and the second bearing assembly machine has a body in which the mounting of the one bearing is completed and the insertion of the crankshaft is completed. A fuselage positioning mechanism that fixes the casing to the assembly position with the center of one bearing as a reference, a bearing positioning mechanism that fixes the other bearing to the assembly position with respect to its center, and the outer periphery of the fuselage casing fixed to the assembly position. And a welding mechanism for welding the body casing to the other bearing from a plurality of positions on the side.

[0007]

In the first bearing assembly machine, one bearing is fixed at the assembly position with the center thereof as the reference. Further, the body casing in which the stator is inserted is fixed at the assembly position with the inner surface of the stator as a reference. Then, in this state, one bearing is welded to the body casing. Therefore, one bearing and the stator are concentric.

In the second bearing assembly machine, the body casing is fixed in the assembly position with the center of one of the bearings as a reference, and the other bearing is fixed in the assembly position with the center of the other bearing as the other bearing. Welded to the fuselage casing. Therefore, the other bearing is concentric with the one bearing and the stator.

Thus, the centers of both bearings coincide with the center of the stator without being affected by the dimensional accuracy of the fuselage casing. That is, the stator and the bearing are aligned with each other regardless of the dimensional accuracy of the body casing, and the gap between the rotor and the stator supported by the bearing becomes uniform.

[0010]

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

FIG. 1 is a schematic view showing the overall structure of an example of an assembling apparatus embodying the present invention, FIG. 2 is a vertical sectional view showing the structure of a first assembling machine, and FIG. 3 is a structure of a third assembling machine. FIG.

As shown in FIG. 1, the present assembly apparatus completes the installation of the first bearing assembly machine for mounting the upper bearing 5 in the lower end of the body casing 1 in which the stator 2 is inserted, and the upper bearing 5. At the center of the body casing 1, the rotor 3
And a second bearing assembly machine C for mounting the lower bearing 6 in the upper end of the body casing 1 after the insertion of the crankshaft 4.
Consists of.

Here, the upper bearing 5 is carried to the first bearing assembly machine A by the pallet 10 and assembled to the body casing 1. The body casing 1 to which the upper bearing 5 is assembled is carried to the crankshaft assembling machine B as it is by the pallet 10, and after the crankshaft 4 is assembled by the assembling machine B,
It is carried to the second bearing assembly machine C.

As shown in FIGS. 2 and 3, the pallet 10 has a bearing support base 1 protruding from the center of the surface of a base plate 11.
Have two. The bearing support 12 horizontally supports the upper bearing 5. The upper bearing 5 supported by the bearing support 12 is fixed to the center position of the pallet 10 by a chuck 13 provided around the bearing support 12. A body support 14 for vertically mounting the body casing 1 is provided on the outer peripheral side of the chuck 13, and a pin hole 15 for positioning the pallet 10 is further provided on the outer peripheral side thereof.

As shown in FIG. 2, the first bearing assembly machine A includes a bearing positioning mechanism 20 for fixing the upper bearing 5 to the assembly position, a body positioning mechanism 30 for fixing the body casing 1 to the assembly position, and positioning. The upper bearing 5 and the welding mechanism 40 for welding the body casing 1 are provided.

The bearing positioning mechanism 20 has a lifting unit 21 for pushing up the pallet 10 sent to the first bearing assembly machine A. When the pallet 10 is pushed up by the elevating unit 21, the positioning pin 23 attached to the main body base 22 is inserted into the pin hole 15. As a result, the pallet 10 is fixed to the assembly position of the first bearing assembly machine A, and as a result, the upper bearing 5 on the pallet 10 is fixed to the assembly position of the first bearing assembly machine A with reference to the center thereof. It

The body positioning mechanism 30 moves in the vertical and horizontal directions as a whole, and has a vertical presser bar 31 at the center thereof. The presser bar 31 fixes the upper bearing 5 on the pallet 10 by moving up and down. A plurality of chucks 32 are provided around the presser bar 31. The chuck 32 is synchronously driven in the radial direction of the bearing retainer rod 31 by the upper drive unit 33, and thereby holds the stator 2 concentrically from the inner surface side. Then, the stator 2 is conveyed to the assembly position of the first bearing assembly machine A, and the body casing externally fitted to the stator 2 is placed on the body pedestal 14.

The welding mechanism 40 has four welding torches 41 arranged at intervals of 90 degrees in the circumferential direction. The welding torch 41 is located outside the lower end portion of the body casing 1 placed on the body cradle 14 and performs TIG welding (plug welding) using the wire 42.

As shown in FIG. 3, the second bearing assembly machine C includes a body positioning mechanism 50 for fixing the body casing 1 to the assembly position, a bearing positioning mechanism 60 for fixing the lower bearing 6 to the assembly position, and positioning. The body casing 1 and the lower bearing 6 are welded together to form a welding mechanism 70.

The body positioning mechanism 50 has the same construction as the bearing positioning mechanism 20 of the first bearing assembly machine A, and positions the pallet 10 pushed up by the lifting unit 51 by the positioning positioning pins 53 attached to the main body base 52. Thus, the upper bearing 5 is fixed to the assembly position of the second bearing assembly machine C. That is, the body casing 1 is fixed to the assembly position of the second bearing assembly machine C with the center of the upper bearing 5 as a reference.

The bearing positioning mechanism 60 as a whole moves vertically and horizontally. A centering rod 61 is provided at the center of the bearing positioning mechanism 60. Centering rod 61
Moves up and down in the bearing positioning mechanism 60 by the cylinder 62 to center the crankshaft 4 in the body casing 1. A chuck 63 is provided around the centering rod 61. The chuck 63 fixes the lower bearing 6 at the center position of the bearing positioning mechanism 60. A plurality of lifting claws 64 and the block 65 are provided around the chuck 63. The lifting claw 64 moves up and down by the cylinder 66,
By the rise, the lower bearing 6 is pulled up and pressed against the lower surface of the block 65 to make the lower bearing 6 horizontal.

The welding mechanism 70 has three welding torches 71 arranged at intervals of 120 degrees in the circumferential direction. The welding torch 71 is located outside the upper end of the body casing 1 fixed at the assembly position of the second bearing assembly machine C, and performs TIG welding (plug welding) using the wire 72.

This assembling apparatus assembles the scroll compressor in the following order.

The upper bearing 5 is fixed at the center of the pallet 10. The pallet 10 is conveyed to the first bearing assembly machine A and positioned by the bearing positioning mechanism 20.
As a result, the upper bearing 5 is fixed to the assembly position of the first bearing assembly machine A with the center thereof as the reference.

When the positioning of the upper bearing 5 is finished, the body positioning mechanism 30 fixes the body casing 1 to the assembly position of the first bearing assembly machine A. The body casing 1 is attached with the stator 1 in advance, and is fixed to the assembly position with the inner surface of the stator 2 as a reference. Upper bearing 5
Is in the lower end of the fuselage casing 1 and its center coincides with the center of the stator 2. That is, the body casing 1 and the upper bearing 5 are combined in a form ignoring the center of the body casing 1.

When the upper casing 5 is assembled to the body casing 1, the welding mechanism 40 simultaneously welds the body casing 1 to the upper bearing 5 from the outer four positions of the body casing 1. As a result, the upper bearing 5 is attached to the body casing 1 concentrically with the stator 2.

After the upper bearing 5 is attached, the upper bearing 5 is fixed to the pallet 10 and the pallet 10 is maintained.
The body casing 1 is conveyed to the crankshaft assembling machine B. In the crankshaft assembly machine B, the crankshaft 4 having the rotor 3 attached thereto is inserted into the center of the body casing 1, and the lower end thereof is inserted into the upper bearing 5.

When the insertion of the crankshaft 4 is completed, the body casing 1 is conveyed by the pallet 10 to the second bearing assembly machine C. The pallet 10 conveyed to the second bearing assembly machine C is positioned by the body positioning mechanism 50.
As a result, the body casing 1 on the pallet 10 is fixed to the assembly position of the second bearing assembly machine A with the center of the upper bearing 5 as a reference.

When the body casing 1 is positioned,
The lower bearing 6 is fixed to the assembly position of the second bearing assembly machine C by the bearing positioning mechanism 30. As a result, the lower bearing 6 is inserted into the upper end of the body casing 1, and the upper end of the crankshaft 4 is inserted into the lower bearing 6. Further, the center of the lower bearing 6 coincides with the center of the upper bearing 5 mounted in the lower end portion of the body casing 1. Upper bearing 5
The center of is already coincident with the center of the stator 2. Therefore, the centers of the stator 2, the upper bearing 5, and the lower bearing 6 are aligned.

After the lower bearing 6 is assembled, the welding mechanism 70 simultaneously welds the lower casing 6 to the lower casing 6 from the outer peripheral side 3 of the body casing 1. Thus, regardless of the dimensional accuracy of the body casing 1, a compressor in which the centers of the stator 2, the upper bearing 5, and the lower bearing 6 coincide with each other can be obtained.

[0031]

As is apparent from the above description, in the compressor assembling apparatus of the present invention, the center of the stator and the center of the stator coincide with each other when one bearing is mounted by the first bearing assembling machine. In addition, after inserting the crankshaft, when mounting the other bearing by the second bearing assembly machine, the center of the other bearing and the center of the one bearing are aligned. Therefore, regardless of the dimensional accuracy of the body casing, the center of the stator coincides with the center of the two bearings, and the crankshaft and the stator supported by the two bearings are concentric. As a result, the gap between the rotor and the stator attached to the crankshaft is made uniform, and deterioration of the performance of the compressor due to the nonuniformity of the gap is prevented. Therefore, it is possible to use the body casing having low dimensional accuracy, and the cost of the compressor can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing the overall configuration of an example of an assembly device embodying the present invention.

FIG. 2 is a vertical sectional view showing a detailed configuration of a first bearing assembly machine.

FIG. 3 is a vertical sectional view showing a detailed configuration of a second bearing assembly machine.

FIG. 4 is a cross-sectional view showing a schematic configuration of a scroll compressor.

FIG. 5 is a sectional view schematically showing a conventional assembling method.

[Explanation of symbols]

 A first bearing assembling machine B crankshaft assembling machine C second bearing assembling machine 1 body casing 2 stator 3 rotor 4 crankshaft 5,6 bearing 10 pallet 20 bearing positioning mechanism provided in the first bearing assembling machine 30 first Body positioning mechanism provided in the bearing assembly machine of No. 40 Machine welding mechanism provided in the first bearing assembly machine 50 Body positioning mechanism provided in the second bearing assembly machine 60 Bearing positioning mechanism provided in the second bearing assembly machine 70 Second bearing Welding mechanism provided in the assembly machine

Claims (1)

[Claims] 1. A first bearing assembly machine (A) for mounting one bearing (5) in one end of a body casing (1) in which a stator (2) is inserted, and mounting of one bearing (5) Finished
A second bearing assembly machine (C) for mounting the other bearing (6) in the other end of the body casing (1) in which the crankshaft (4) with the rotor (3) externally inserted is inserted in the center The first bearing assembly machine (A) has a bearing positioning mechanism (20) for fixing one bearing (5) at the assembly position with the center of the bearing as a reference.
And a fuselage positioning mechanism (30) for fixing the fuselage casing (1) with the stator (2) inserted in the assembled position with the inner surface of the stator (2) as a reference, and the fuselage casing (1) fixed in the assembled position. And a welding mechanism (40) for welding the body casing (1) to one bearing (5) from a plurality of positions on the outer peripheral side of the second bearing assembly machine (C). Fuselage casing after finishing the insertion of the crankshaft (4)
The body positioning mechanism (50) that fixes (1) to the assembly position with the center of one bearing (5) as a reference, and the bearing positioning mechanism (50) that fixes the other bearing (6) to the assembly position with the center as a reference. 60) and a welding mechanism (70) for welding the body casing to the other bearing (6) from a plurality of positions on the outer peripheral side of the body casing (1) fixed to the assembly position. .