JP2017180161A - Alignment assembling method of parts, assembling method of rotary compressor and jig used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate geometric tolerance [same accuracy in center], influence of wear at a fixing jig and improve a center adjustment accuracy in such a manner that a size between the two components may become constant when they are fixed before adjustment of their centers and they occupy positions near appropriate sizes after adjustment of centers.SOLUTION: This invention relates to a rotary compressor assembling method in which the inner diameter surfaces of a cylinder 32 and a front head 33 are aligned at their appropriate positions and fixed, while a minimum clearance at the inner diameter surface of the cylinder 32 being applied as a measuring surface of an air-micro 62, the cylinder 32 is pushed against a cylinder fixing jig and fixed, the inner diameter surface of the front head 33 is pushed against an air-micro 63 and fixed by a head fixing jig, and a position of the head fixing jig is adjusted in respect to the cylinder fixing jig by the air-micro 62 and the air-micro 63 on the basis of a result in which a part from the measuring surface of the cylinder 32 to the inner diameter surface of the front head 33 is measured.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an assembling method and an assembling method of a rotary compressor, and a jig used for the assembling method for assembling compressor parts and the like so that the dimension between two parts becomes an appropriate dimension in a temporarily assembled state. Suitable for assembling the cylinder and front head of the machine.

  Reciprocating, rotary, and scroll type compressors are known as compressors used in air conditioners, and all of them perform suction and compression of refrigerant by rotating a piston in a cylinder. In the rotary compressor, when the motor rotates, the shaft rotates and the piston in the cylinder rotates eccentrically. Along with this, the volume of the compression chamber formed in the cylinder is changed to compress the refrigerant inside. Therefore, in the rotary compressor, the center of the cylinder in which the compression chamber is configured and the drive shaft (shaft) that rotates the piston in the cylinder need to coincide with each other with high accuracy, which greatly affects the performance.

  That is, if the gap between the piston and the cylinder is too large in the cylinder, the amount of refrigerant leaking through the gap increases, and the compression efficiency decreases. However, if the gap between the piston and the cylinder is too small, the gap between the piston and the cylinder disappears due to deformation of each part (deformation due to bolt fastening, thermal expansion during compression operation, pressure deformation during compression operation, etc.). As a result, the sliding resistance increases, and as a result, the piston is damaged. For this reason, the gap between the piston and the cylinder has to be appropriately sized, and adjustment management and alignment of the gap are required during assembly.

  Conventionally, the axis of the cylinder hole is displaced with respect to the axis of the drive shaft, and the gap between the inner wall of the cylinder hole corresponding to the compression side and the piston portion of the drive shaft is narrowed, and also corresponds to the suction side. The axis of the cylinder hole is shifted with respect to the drive shaft so as to enlarge the gap between the cylinder hole and the piston. In addition, pistons are inserted into the upper eccentric part and lower eccentric part of the crankshaft that is the drive shaft, respectively, and the outermost surfaces of the main shaft part and the sub-shaft part are outside the maximum of the pistons inserted into the eccentric parts. It is known to measure the circular dimension at both the upper eccentric part and the lower eccentric part respectively, and based on the maximum outer circle dimension data of the piston, the main bearing and the first cylinder are aligned and fastened with a fixing bolt. It is described in Document 1.

  Further, in Patent Document 1, in a rotary compressor having a plurality of cylinders, the axial center relationship is set with reference to the outer wall of the bearing on the side on which the cylinder is first attached, and the bearing-side cylinder based on this reference is set. It is described that it is incorporated in the bearing sequentially.

Furthermore, in Patent Document 2, a drive shaft is supported by a main bearing and a sub-bearing in order to obtain a bearing coaxial assembling method of a rotary compressor that can be assembled simply, at high speed and with high accuracy and has little influence on the surrounding environment.
Fix the main bearing to the cylinder with bolts, temporarily tighten the sub bearing to the cylinder with the bolts loosened, clamp the sub bearing, and then swing the sub bearing in the direction opposite to the eccentric direction of the shaft. It is described to be cored.

JP-A-61-76790 JP 2010-281219 A

  In the above-described prior art, two parts, which are both workpieces, are individually fixed by jigs, and moved so as to be aligned by determining one moving direction based on the dimension between the parts. And while monitoring the measurement value which fluctuates by movement, in consideration of other part dimension information to assemble, it moves to an appropriate position and is fixed with a bolt. That is, in both cases, the axial center relationship is set as a reference by fixing the outer wall of the bearing to which the cylinder is attached.

  Therefore, there is dimensional variation for each product within the manufacturing tolerance range between the outer wall, which is the fixed part, and the bearing inner wall, which is the part that measures the dimension between parts, and the geometric tolerance (concentricity) between the two is the same. There is variation, and the position of the inner wall of the bearing, which is a part for measuring the dimension between parts, is not constant when the outer wall is fixed. Moreover, the position of the part which measures the dimension between parts changes with time by wear of a fixing jig.

  Further, in general, in the movement for alignment, when the movement amount is large, it is necessary to increase the moving speed, decelerate and stop at the appropriate position when approaching the appropriate position. Therefore, there is a response delay between the measuring instrument and the moving instrument, and there is a risk that it will go too far to move to the proper position.

  Furthermore, for a moving instrument, there is a backlash in the drive / sliding system, and in the case of a behavior that goes back too much, the drive system may move but the instrument may not move due to the backlash. For this reason, time is required for alignment, and the alignment accuracy for stopping at an appropriate position is also affected.

  The object of the present invention is to solve the above-mentioned problems of the prior art, so that the dimension between the parts is constant when the two parts, which are workpieces, are fixed before the alignment, and the dimension between the parts is an appropriate dimension after the alignment. In other words, the geometric tolerance (concentricity) between them and the influence of wear of the fixing jig are eliminated, the alignment time is shortened, and the alignment accuracy is improved.

  Another purpose is to improve the performance of the compressor by aligning the position of the rotary compressor cylinder and front head to the appropriate position without affecting the geometric tolerance (concentricity) between them and the wear of the fixture. And to improve the stability of performance.

In order to achieve the above object, the present invention provides a component aligning and assembling method in which the inner diameter surfaces of the component 1 and the component 2 are fixed in accordance with an appropriate position, and the predetermined position of the inner diameter surface of the component 1 is a measurement surface, The measuring surface is pressed against the measuring jig 1 and the part 1 is fixed with the fixing jig 1, and the part 2 can be slid in the clamped direction by clamping the outer diameter portion, and the inner diameter surface of the part 2 is measured. Based on the result of measuring from the measurement surface of the component 1 to the inner diameter surface of the component 2 using the measurement jig 1 and the measurement jig 2, The position of the fixing jig 1 is adjusted with respect to the fixing jig 2.
The method using the measurement jig 1 and the measurement jig 2 to measure from the measurement surface of the component 1 to the inner diameter surface of the component 2 is preferably a method using an air micro but is not limited to this. It is possible to adopt a method that mechanically measures the gap between the measuring jig 1 and measuring jig 2 and the measuring surface and the inner diameter surface, a method that uses light such as a laser, etc., and generally measures the gap. The method used to do this can be employed.

Further, according to the present invention, in a method of assembling a rotary compressor in which the inner diameter surfaces of the cylinder and the front head are fixed in accordance with an appropriate position, the cylinder clearance is fixed using the air micro 1 as the measurement surface with the minimum clearance direction of the inner diameter surface of the cylinder. The cylinder is fixed by pressing against the tool, the inner diameter surface of the front head is pressed against the air micro 2 and fixed with a head fixing jig, and the measurement surface of the cylinder and the measurement surface are Based on the measurement result of the inner diameter surface of the front head, the position of the head fixing jig is adjusted with respect to the cylinder fixing jig.
By measuring the gap between the measurement surface and the front head inner diameter surface with the air micro 1 and the air micro 2, the distance and positional relationship between the measurement surface and the front head inner diameter surface can be understood. Since these distances and positional relationships can be measured while adjusting the positions of the cylinder and the front head, they can be easily adjusted to the optimal positional relationship.

  Further, in the above rotary compressor assembling method, the cylinder fixing jig has a clamp receiving seat whose outer diameter side is cut open in the minimum clearance direction with a curvature along the inner diameter surface of the cylinder, The cylinder is preferably fixed by being pressed against the clamp receiving seat.

  Further, in the above-described method for assembling the rotary compressor, it is desirable that the air micro 1 can measure the low pressure chamber side clearance and the high pressure chamber side clearance along with the minimum clearance direction of the cylinder inner surface.

  Furthermore, in the above assembly method of the rotary compressor, it is preferable that the head fixing jig fixes the front head by sandwiching the outer diameter portion in a V shape in the minimum clearance direction and pressing it with a plate from the opposite direction.

  Furthermore, in the above assembly method of the rotary compressor, it is desirable that the head fixing jig is slidable in the minimum clearance direction, and the inner diameter surface of the front head is pressed against the air micro 2 and fixed. .

  Further, in the above-described method for assembling the rotary compressor, it is desirable that the air micro 2 can measure the low pressure chamber side clearance and the high pressure chamber side clearance along with the minimum clearance direction of the front head inner diameter surface.

  Further, in the above rotary compressor assembling method, the cylinder fixing jig is a mechanism capable of adjusting the position with respect to the head fixing jig, and is fixed in advance so that the minimum clearance becomes small with respect to the proper alignment position. It is desirable.

  The present invention also relates to an assembly jig for a rotary compressor for individually fixing a cylinder and a front head and fixing each inner diameter surface to an appropriate position, and for measuring the inner diameter surface of the cylinder. 1, an air micro 2 for measuring the inner diameter surface of the front head, a cylinder fixing jig for fixing the cylinder by pressing the minimum clearance direction of the inner diameter surface of the cylinder against the measurement surface of the air micro 1, and the front head With the outer diameter part sandwiched between the V shape in the minimum clearance direction and pressed with a plate from the opposite direction to fix the clamp, and the clamp can be slid in the minimum clearance direction by the cross roller guide mechanism. And a head fixing jig that is pressed against and fixed to the air micro 2.

  Further, in the assembly jig for the rotary compressor described above, a clamp receiving seat whose outer diameter side is cut open in the minimum clearance direction with a curvature along the inner diameter surface of the cylinder and slightly protrudes from the air micro 1 toward the outer diameter side. It is desirable to have

  According to the present invention, the measuring surface of the part 1 is pressed against the measuring jig 1 and fixed to the fixing jig 1, the part 2 is slidable in the clamped direction, the inner diameter surface is pressed against the measuring jig 2, and the measuring jig is measured. The position of the fixing jig 1 is adjusted by measuring from the measuring surface of the component 1 to the inner diameter surface of the component 2 using the tool 1 and the measuring jig 2. As a result, the two components are reliably measured from the measurement surface of the component 1 to the inner diameter surface of the component 2, and the tolerance of the component, for example, the concentricity between the outer diameter portion and the inner diameter surface of the component 2. It can be adjusted to the appropriate position without being affected by the size of the outer diameter portion.

  In particular, in a method of assembling a rotary compressor in which the inner diameter surfaces of the cylinder and the front head are fixed at appropriate positions, the minimum clearance direction of the inner diameter surface of the cylinder is fixed to the cylinder fixing jig as the measurement surface of the air micro 1. Then, the inner surface of the front head is pressed against the air micro 2 and fixed with a head fixing jig, and the air micro 1 and the air micro 2 are used to measure from the measuring surface of the cylinder to the inner surface of the front head to fix the head. Adjust the position of the cylinder fixture relative to the tool. As a result, the cylinder and the front head are reliably measured from the measurement surface of the cylinder, which is the dimension between the parts, to the inner diameter surface of the front head, and the tolerance of the parts, for example, the concentricity of the outer diameter portion and the inner diameter surface of the front head It can be adjusted to the appropriate position without being affected by the size of the outer diameter portion.

  As described above, the position of two parts, for example, the cylinder and the front head of the rotary compressor can be adjusted to an appropriate position without the influence of geometrical tolerance (concentricity) between them and wear of the fixing jig.

The longitudinal cross-sectional view of the rotary compressor concerning embodiment of this invention Partly enlarged view of II-II cross section in FIG. The longitudinal cross-sectional view and partial expanded sectional view which show the relationship which assembled the drive shaft, piston, cylinder, and front head in one Embodiment In one embodiment, a longitudinal sectional view and a partially enlarged sectional view showing a state in which an air micro is installed on the inner diameter surface of the cylinder Explanatory drawing which shows calculation of the dimension of the drive shaft + piston main body in one Embodiment The partially expanded sectional view which shows the fixing method of the cylinder in one Embodiment The top view which shows the head fixing jig in one Embodiment The longitudinal cross-sectional view which shows the state which combined the cylinder and front head in one Embodiment after fixing with each fixing jig. The perspective view which shows the state which assembled the cylinder fixing jig in one Embodiment. The perspective view which shows the state which the cylinder fixing jig 60 disassembled

Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a rotary compressor, FIG. 2 is a partially enlarged view of the II-II section of FIG. 1, and the rotary compressor 1 is a refrigerant circuit (not shown) that performs a refrigeration cycle by circulating refrigerant. To compress the refrigerant. As shown in FIG. 1, the rotary compressor 1 includes a casing 10, a compression mechanism 30 accommodated in the casing 10, and an electric motor 20. The rotary compressor 1 has a so-called high-pressure dome shape in which the refrigerant compressed by the compression mechanism 30 is discharged into the internal space S1 of the casing 10 and the internal space S1 has a high pressure.

  The casing 10 includes a cylindrical body portion 11 extending in the vertical direction, an upper end plate 12 that closes the upper end of the body portion 11, and a lower end plate 13 that closes the lower end of the body portion 11. A suction pipe 14 is provided at the lower part of the body 11, and a discharge pipe 15 and a terminal 16 for supplying electric power to the electric motor 20 are provided on the upper end plate 12. In addition, an oil reservoir 17 in which oil for lubricating each sliding portion of the compression mechanism 30 is stored is formed in the lower end plate 13.

  The electric motor 20 is disposed on the upper portion of the trunk portion 11 in the casing 10. The electric motor 20 includes a stator 21 fixed in the body 11 and a rotor 22 disposed inside the stator 21. The compression mechanism 30 is disposed below the electric motor 20 in the casing 10. The compression mechanism 30 includes a drive shaft 31, a cylinder 32, a front head 33, a rear head 34, and a piston 35.

  The drive shaft 31 is disposed so as to extend in the vertical direction. The upper part of the drive shaft 31 is connected to the rotor 22 of the electric motor 20. On the other hand, the lower portion of the drive shaft 31 has a main shaft portion 31a, an eccentric portion 31b, and a sub shaft portion 31c in order from the top to the bottom. The eccentric part 31b is eccentric with respect to the axis of the drive shaft 31, and is formed to have a larger diameter than the main shaft part 31a and the auxiliary shaft part 31c.

  The cylinder 32 is formed in a substantially cylindrical shape, and is arranged so that its axis extends in the vertical direction. An eccentric portion 31 b of the drive shaft 31 is inserted into the cylinder 32. The front head 33 is fastened to the upper end of the cylinder 32 with a bolt 52. The front head 33 is formed with a cylindrical main bearing portion 33 a that rotatably supports the main shaft portion 31 a of the drive shaft 31. The front head 33 closes the upper end of the compression chamber 40 formed between the cylinder 32 and the piston 35.

  The piston 35 is disposed in the cylinder 32, and the piston 35 has a piston main body 35a and a blade 35b. The piston main body 35a is formed in a substantially cylindrical shape, and an eccentric portion 31b of the drive shaft 31 is slidably fitted therein. The piston main body 35a rotates eccentrically as the drive shaft 31 rotates.

  The blade 35b is formed integrally with the piston main body 35a and protrudes radially outward from the outer peripheral surface of the piston main body 35a. The blade 35b is sandwiched between a pair of rocking bushes 42a and 42b provided in a bush groove 41 extending radially outward from the inner peripheral surface of the cylinder 32, and the compression chamber 40 is divided into a low pressure chamber 40a and a high pressure chamber 40b. It is divided into and.

  A suction passage 43 is formed in the cylinder 32. The suction passage 43 is formed so as to penetrate between the inner peripheral surface and the outer peripheral surface of the cylinder 32, and its outer peripheral end (inflow end) is connected to the suction pipe 14, and its inner peripheral end (outflow end) is the low pressure chamber. It opens to 40a.

  The cylinder 32 is formed with a discharge port 44. The discharge port 44 opens into the high-pressure chamber 40 b and further communicates with a discharge passage (not shown) in the front head 33 that opens into the internal space S <b> 1 of the casing 10. The front head 33 is provided with a discharge valve (not shown) for opening and closing the discharge passage.

  An outline of alignment will be described. FIG. 3 is a longitudinal sectional view and a partially enlarged sectional view showing the assembled relationship of the drive shaft 31, the piston main body 35a, the cylinder 32, and the front head 33. The piston main body 35a and the drive shaft 31 are eccentric. Therefore, first, the dimensions of the drive shaft 31 + the piston main body 35a are calculated. Next, the cylinder 32 and the front head 33 are combined and inserted into the air micros 62 and 63 (see FIG. 4). Then, the phase for measuring the dimension between the parts of the cylinder 32 and the front head 33 requiring alignment and the fixing direction are set to a predetermined phase as shown in FIG.

  FIG. 4 is a longitudinal sectional view and a partially enlarged sectional view showing a state in which the air micros 62 and 63 are installed on the inner diameter surface of the cylinder 32. The air micros 62 and 63 include the minimum clearance CP, the low pressure chamber side gap BL2, A measurement nozzle is provided opposite to each measurement surface of the high-pressure chamber side gap BL1, and an air flow is supplied from a constant pressure device to reduce resistance due to a slight change in the clearance between the measurement surface and the change in air pressure, flow rate or flow velocity. And measure the dimensions.

  Next, air micros 62 and 63 are installed on the inner diameter surface of the cylinder 32, and the minimum clearance CP, the low pressure chamber side gap BL2, and the high pressure chamber side gap BL1 are measured as shown in FIG. As the alignment table, for example, the front head 33 side is moved, and alignment is performed so that the minimum clearance CP, the low pressure chamber side gap BL2, and the high pressure chamber side gap BL1 are at appropriate positions. After the alignment is completed, the cylinder 32 and the front head 33 are fastened with bolts 52 and fixed.

  When moving on the front head 33 side, simply clamping at the outer diameter portion, when clamping both the cylinder 32 and the front head 33 due to differences in inner / outer diameter tolerance, concentricity, jig wear, etc. The position of the measurement part of the work is shifted. Therefore, variations occur in the measured values of the minimum clearance CP, the low pressure chamber side gap BL2, and the high pressure chamber side gap BL1, and the alignment movement amount also varies.

  FIG. 5 is an explanatory diagram showing the calculation of the dimensions of the drive shaft 31 + piston body 35a. When the drive shaft 31 and the piston blade 35b are individually measured, the drive shaft 31 is actually rotated at the time of each measurement. Therefore, measurement is performed with the cylinder 32 and the front head 33 combined. In other words, the dimensions of the drive shaft 31 + piston body 35a are measured by rotating the drive shaft 31 and changing the piston phase so that the piston blade 35b is leftmost, middle, and rightmost.

  FIG. 6 is a partially enlarged cross-sectional view showing a method of fixing the cylinder 32. The inner surface of the cylinder 32 is pressed against the cylinder fixing jig 60 (see FIG. 10) and fixed. FIG. 9 is a perspective view showing the assembled state of the cylinder fixing jig 60, and FIG. 10 is a perspective view showing the disassembled state of the cylinder fixing jig 60. In the cylinder fixing jig 60, an air micro 62 for measuring the inner diameter surface of the cylinder 32 and an air micro 63 (see FIG. 10) for measuring the inner diameter surface of the front head 33 are integrally formed on the lower base 64. A clamp receiving seat 61 is provided on the upper base 66 so as to slightly protrude from the air micro 62 toward the outer diameter side.

  The air micro 62 only needs to be able to measure the dimensions of the measurement surfaces of the minimum clearance CP, the low pressure chamber side gap BL2, and the high pressure chamber side gap BL1 on the inner diameter surface of the cylinder 32. The distance is measured. Similarly, the air micro 63 is provided with a nozzle so that the distance to the inner diameter surface of the front head 33 can be measured. In addition, although demonstrated as the air micro 62 and the air micro 63, what is necessary is just to synthesize | combine like FIG.

  As shown in FIG. 6, the air micro 62 is provided with a notch in the direction of the minimum clearance CP as shown in the figure, and a clamp receiving seat 61 is installed on the upper base 66 (see FIG. 10). The clamp seat 61 is cut open in the direction of the minimum clearance CP with a curvature along the inner diameter surface of the cylinder 32 on the outer diameter side. Thereby, the dimensional change in the minimum clearance CP direction of the cylinder 32 can be measured by the air micro 62.

  Further, the outer peripheral surface of the clamp receiving seat 61 in the radial direction protrudes from the outer peripheral surface of the air micro 62 so as to be close to the value of the minimum clearance CP and slightly smaller. As a result, the cylinder 32 is brought close to the appropriate position, so that the amount of movement for position adjustment can be set to a minimum, and the movement error of the movement mechanism can be reduced to improve accuracy. Furthermore, the moving direction of the moving mechanism can always be the same direction, and backlash of the moving mechanism can be avoided to further improve the accuracy.

  The cylinder 32 is pressed and fixed to the clamp receiving seat 61 in the direction of the minimum clearance CP as a measurement surface by a cylinder clamp (not shown: only arrows). Therefore, the position of the measurement surface of the minimum clearance CP of the cylinder 32 is constant regardless of the size of the inner diameter and the outer diameter of the cylinder 32.

  In addition to the minimum clearance CP measurement surface, the air micro 62 has a nozzle facing the measurement surface of the low pressure chamber side gap BL2 and the measurement surface of the high pressure chamber side gap BL1. The positions of the measurement surface of the low-pressure chamber side gap BL2 and the measurement surface of the high-pressure chamber side gap BL1 change uniformly depending on the inner diameter of the cylinder 32.

  FIG. 7 is a plan view showing a head fixing jig 70 for fixing the front head 33. In the drawing, the minimum clearance CP direction on the right side is clamped from the left side that is 180 degrees opposite direction with the outer diameter portion sandwiched between the V-shaped portions. The cylinder 75 is pressed by the plate 75 and fixed to the clamp 71. The V-shaped jig on the right side for fixing the front head 33 is provided with a copying mechanism, and when fixed, it is completely fixed from both sides at two points of the V shape of the jig and one point on the left side.

  The entire clamp 71 can be slid in the clamping direction which is the same as the minimum clearance CP direction by the cross roller guide 72, and the inner diameter surface of the front head 33 is pressed against the air micro 63 by the tension spring 73 and fixed. Therefore, the position of the measurement surface of the minimum clearance CP of the front head 33 is 180 degrees opposite to the position where the cylinder 32 is pressed. Further, the front head 33 is fixed by being pressed by a cylinder clamp (not shown: only an arrow) in the direction of the minimum clearance CP as a measurement surface, and the inner diameter and the outer diameter of the front head 33 are larger and smaller outer diameter portions are clamped. It is constant regardless of the difference in concentricity between the measured inner diameter surface, that is, the actually sliding portion.

  As described above, when the cylinder 32 and the front head 33 are fixed, the jigs are pressed and fixed to the surfaces to be measured. Therefore, the manufacturing tolerance of the parts, which has been a conventional problem, and the surfaces to be clamped and the surfaces to be measured are Therefore, there is no variation in the dimension between parts caused by the difference in the geometrical tolerance and the wear of the clamping jig.

  In addition, the jig for fixing the front head 33 is a mechanism capable of adjusting the position relative to the jig for fixing the cylinder 32, and the position is adjusted in advance so that the minimum clearance CP is small at a position close to the proper alignment position. Go and fix. As a result, when fixing before alignment, the inter-part dimension is already set close to the proper position, and the amount of movement and the accuracy of the movement mechanism that increase with the amount of feed of the moving mechanism is reduced. Can be improved.

  Further, by adjusting the position so that the minimum clearance CP becomes small, the moving direction for alignment becomes constant, and it is possible to avoid the difference in the moving amount caused by the moving direction of the moving mechanism and the influence of backlash.

  FIG. 8 is a longitudinal sectional view showing a state where the cylinder 32 and the front head 33 are combined with each other after being fixed by the fixing jigs. In this state, the amount of movement to an appropriate position is calculated, and the moving mechanism is a numerical control device. To move to the proper position. After the movement, the minimum clearance CP, the low pressure chamber side gap BL2, and the high pressure chamber side gap BL1 are confirmed by the air micros 62 and 63, and the cylinder 32 and the front head 33 are fastened by bolts 52 and fixed.

  As described above, the minimum clearance CP, the low pressure chamber side gap BL2, and the high pressure chamber side gap BL1 are the dimensions between the cylinder 32 and the front head 33, which greatly affect the performance improvement and stability of the compressor. Regardless of the dimensional variation for each part, the difference in geometric tolerance (concentricity), etc., the cylinder 32 and the front head 33 can be fixed at a constant value. Further, the influence of wear of the head fixing jig 70 for fixing the front head 33 can be avoided.

  By providing the clamp receiving seat 61, the cylinder 32 can be brought close to an appropriate position in advance, the amount of movement for position adjustment can be minimized, the accuracy of the moving mechanism can be improved, and the moving direction of the moving mechanism is always the same. It is possible to further improve the accuracy by using the same direction and avoiding backlash.

  DESCRIPTION OF SYMBOLS 1 ... Rotary compressor, 10 ... Casing, 11 ... Body part, 12 ... Upper end plate, 13 ... Lower end plate, 14 ... Intake pipe, 15 ... Discharge pipe, 16 ... Terminal, 17 ... Oil sump part, 21 ... Stator, 20 DESCRIPTION OF SYMBOLS Electric motor, 22 ... Rotor, 30 ... Compression mechanism, 31 ... Drive shaft, 31a ... Main shaft part, 31b ... Eccentric part, 31c ... Sub shaft part, 32 ... Cylinder, 33 ... Front head, 33a ... Main bearing part, 34 ... Rear head, 35 ... piston, 35a ... piston body, 35b ... blade, 40 ... compression chamber, 40a ... low pressure chamber, 40b ... high pressure chamber, 41 ... bush groove, 42a, 42b ... swinging bush, 43 ... suction passage, 44 ... Discharge port, 52 ... bolt, CP ... minimum clearance, BL2 ... low pressure chamber side clearance, BL1 ... high pressure chamber side clearance, 60 ... cylinder fixing jig, 61 ... clamp receiving seat, 62, 63 ... Ah Micro, 64 ... lower base, 65 ... China and Taiwan, 66 ... elevator, 70 ... head fixing jig 71 ... clamps, 72 ... cross roller guide, 73 ... tension spring, 74 ... clamping cylinder, 75 ... plate

Claims (10)

In the part aligning and assembling method for fixing the inner diameter surfaces of the parts 1 and 2 to the appropriate positions,
A predetermined position of the inner diameter surface of the component 1 is set as a measurement surface, the measurement surface is pressed against the measurement jig 1, and the component 1 is fixed by the fixing jig 1.
The component 2 can be slid in the clamped direction by clamping the outer diameter portion, and the inner diameter surface of the component 2 is pressed against the measuring jig 2 and fixed with the fixing jig 2.
The position of the fixing jig 1 with respect to the fixing jig 2 based on the measurement result from the measuring surface of the component 1 to the inner diameter surface of the component 2 by the measuring jig 1 and the measuring jig 2. A method for aligning and assembling parts, comprising adjusting In the assembly method of the rotary compressor for fixing the inner diameter surface of the cylinder and the front head in accordance with the proper position,
The cylinder is fixed by pressing the minimum clearance direction of the inner diameter surface of the cylinder as a measurement surface of the air micro 1 against a cylinder fixing jig,
The inner diameter surface of the front head is pressed against the air micro 2 and fixed with a head fixing jig,
Based on the measurement result of the measurement surface of the cylinder and the inner diameter surface of the front head by the air micro 1 and the air micro 2, the position of the head fixing jig is adjusted with respect to the cylinder fixing jig. A method for assembling a rotary compressor.   The cylinder fixing jig has a clamp receiving seat whose outer diameter side is cut open in the minimum clearance direction with a curvature along the inner diameter surface of the cylinder, and the cylinder is fixed by being pressed against the clamp receiving seat. The method for assembling the rotary compressor according to claim 2.   4. The rotary compressor assembly according to claim 2, wherein the air micro 1 is capable of measuring a low pressure chamber side clearance and a high pressure chamber side clearance along with a minimum clearance direction of the cylinder inner diameter surface. Method.   5. The head fixing jig according to claim 2, wherein the front head is fixed by inserting the outer diameter portion into a V shape in a minimum clearance direction and pressing the front head with a plate from the opposite direction. A method of assembling the rotary compressor according to claim 1.   6. The head fixing jig according to claim 2, wherein the head fixing jig is slidable in a minimum clearance direction, and an inner diameter surface of the front head is pressed against and fixed to the air micro 2. A method for assembling the rotary compressor according to claim 1.   7. The air micro 2 can measure a low pressure chamber side gap and a high pressure chamber side gap together with a minimum clearance direction of the front head inner diameter surface. A method of assembling the rotary compressor according to claim 1.   8. The cylinder fixing jig is a mechanism capable of adjusting a position with respect to the head fixing jig, and is fixed in advance so that a minimum clearance becomes small with respect to a proper alignment position. The assembly method of the rotary compressor of any one of description. An assembly jig for a rotary compressor that fixes a cylinder and a front head individually, and fixes each inner diameter surface to an appropriate position,
An air micro 1 for measuring the inner surface of the cylinder;
An air micro 2 for measuring the inner diameter surface of the front head;
A cylinder fixing jig for fixing the cylinder by pressing the minimum clearance direction of the inner diameter surface of the cylinder against the measurement surface of the air micro 1;
A clamp for holding the front head in a minimum clearance direction with an outer diameter portion sandwiched between V-shaped parts and pressing and fixing with a plate from the opposite direction;
A head fixing jig that allows the clamp to slide in a minimum clearance direction by a cross roller guide mechanism, and presses and fixes the inner diameter surface of the front head against the air micro 2;
An assembly jig for a rotary compressor, comprising:   10. The clamp seat according to claim 9, wherein the outer diameter portion side is cut open in a minimum clearance direction with a curvature along the inner diameter surface of the cylinder, and includes a clamp receiving seat that protrudes slightly toward the outer diameter portion side from the air micro 1. Assembly jig for rotary compressors.