JPH0953574A - Scroll type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a labor and a time required for location of a shim inserted, in a specified combination spot of a fixed scroll and a revolving scroll so that a tip gap between the tips of the helical laps of the fixed scroll and the revolving scroll and the inner surfaces of the end plates of scrolls on the mating side is adjusted to a set value. SOLUTION: A shim is divided and comprises a plurality of arcuate shims 37A and 37B. In a state that a fixed scroll 1 and a revolving scroll 2 are temporarily assembled, the arcuate shims 37A and 37B are inserted in a specified combination spot from the radial direction side and assembled together by fastening an assembling bolt 64.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor mounted on a vehicle air conditioner or the like.

[0002]

2. Description of the Related Art One example of a conventional scroll compressor is shown in FIG.
And shown in FIG. In FIG. 2, reference numeral 4 denotes a housing, which includes a motor case 49, a frame 5, and a front case 43, which are fastened to each other by bolts 56. An electric motor M is provided inside the motor case 49, and a scroll compression mechanism C is provided inside the front case 43.

The electric motor M and the scroll type compression mechanism C are interlockingly connected to each other via a rotary shaft 3. The right end of the rotary shaft 3 is supported by the motor case 49 via a sub-bearing 51, and the left end is rotatably supported by the frame 5 via a main bearing 52.

The electric motor M includes a rotor Ma and a stator Mb.
And the rotor Ma is fixed to the rotary shaft 3,
The stator Mb is fixed by being pressed into the motor case 49.

The scroll type compression mechanism C comprises a fixed scroll 1, an orbiting scroll 2 and the like.

The fixed scroll 1 is provided with an end plate 11 and a spiral wrap 12 provided upright on the inner surface of the end plate 11, and the outer peripheral surface of the end plate 11 is brought into close contact with the inner peripheral surface of the front case 43 to thereby end plate 11. A discharge chamber 46 is formed on the left side and a suction chamber 47 is limited on the right side. The discharge port 13 is located in the center of the end plate 11.
The discharge port 13 is opened and closed by a discharge valve 17.

On the outer peripheral edge of the inner surface of the end plate 11, as shown in FIG. 3, a plurality (4 in FIG. 4) are arranged at equal intervals along the circumferential direction.
15) are protruded rightward, and a shim 37 is interposed between the tip surfaces of the legs 15 and the tip surfaces of the protrusions 36 projecting from the frame 5 so as to face the leg surfaces. The fixed scroll 1 is fixed to the frame 5 by screwing an assembling bolt 64 penetrating the frame 5 into the leg 15 and tightening it.

The orbiting scroll 2 is provided with an end plate 21 and a spiral wrap 22 erected on the inner surface of the end plate 21, and a drive bush 32 is provided in an orbiting bearing 34 in a boss 23 erected on the outer surface of the end plate 21. It is rotatably fitted through. An eccentric drive pin 31 eccentrically provided at the left end of the rotary shaft 3 is slidably fitted in a slide groove 33 formed in the drive bush 32.

The outer peripheral edge of the outer surface of the end plate 21 is in sliding contact with a thrust bearing 53 fixed to the left end surface of the frame 5, and the end plate 21
A rotation prevention mechanism 6 including an Oldham link is interposed between the frame 5 and the frame 5.

A plurality of compression chambers 24 are formed by making the fixed scroll 1 and the orbiting scroll 2 eccentric to each other by a predetermined distance and engaging with each other while shifting the angle by 180 degrees.

By driving the electric motor M, the orbiting scroll 2 is driven via the orbiting drive mechanism including the rotary shaft 3, the eccentric drive pin 31, the slide groove 33, the drive bush 32, the orbiting bearing 34, the boss 23 and the like. The orbiting scroll 2 revolves around a circular orbit having an orbiting radius while being prevented from rotating by the rotation preventing mechanism 6.

Then, the gas enters the low pressure chamber 48 through the suction port 44, and this gas is passed through the passage provided on the outer periphery of the stator Mb.
After cooling the electric motor M in the process of passing through the gap 58 between the stator 58 and the stator Ma and the rotor Ma, the electric motor M is sucked into the compression chamber 24 via the passage 54 and the suction chamber 47 provided in the frame 5.

Then, as the volume of the compression chamber 24 decreases due to the orbiting motion of the orbiting scroll 2, the compression chamber 24 is compressed and reaches the central portion. From the central portion, the discharge valve 17 is pushed open to open the discharge valve 17. It is discharged into the inside of the container 46, and then flows out through the discharge port 45.

Reference numeral 18 denotes a valve retainer for limiting the rise of the discharge valve 17, which is fixed to the outer surface of the end plate 11 of the fixed scroll 1 together with the discharge valve 17 by a bolt 19. Reference numeral 35 is a balance weight fixed to the rotary shaft 3, and 68 is a knock pin for positioning.

[0015]

In the above conventional scroll compressor, as shown in FIG. 3, since the shim 37 has an annular shape, the fixed scroll 1 and the orbiting scroll 2 are assembled at the time of assembly. Corresponding to this tip clearance by meshing with each other, the tip clearance of the spiral wraps 11 and 21 of the scrolls 1 and 2 and the clearance between the inner surface of the end plates 22 and 12 of the counterpart scrolls 2 and 1, that is, the tip clearance, is measured. Thickness of shim 37
After selecting, the fixed scroll 1 and the orbiting scroll 2 are separated, the shim 37 selected in this state is interposed between the tip surface of the leg 15 and the tip surface of the protrusion 36, and the fixed scroll 1 and the orbiting scroll are again provided. Since 2 and 2 were assembled, there was a problem that the assembly takes time and labor.

[0016]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above-mentioned problems, and its gist is to make a fixed scroll and an orbiting scroll mesh with each other to form a spiral shape. Measure the tip clearance between the tip of the wrap and the inner surface of the end plate of the other scroll,
In a scroll compressor in which a shim having a thickness corresponding to this tip gap is inserted into a specific assembly portion of the fixed scroll and the orbiting scroll to assemble, the shim is divided into a plurality of arc-shaped shims, and the fixed portion is fixed. A scroll-type compressor characterized in that the arc-shaped shim is inserted into the specific assembly portion from the outside in the radial direction in a state where the scroll and the orbiting scroll are temporarily assembled.

Another feature is that a notch for fitting with an assembling bolt is provided on the inner peripheral side of the arc-shaped shim.

Therefore, the fixed scroll and the orbiting scroll are meshed with each other to measure the tip clearance, the arc-shaped shim having a thickness corresponding to this tip clearance is selected, and a plurality of fixed scrolls and the revolving scroll are temporarily assembled. The fixed scroll and the orbiting scroll are assembled by inserting the arc-shaped shim of (4) into a specific assembly location from the outside in the radial direction.

[0019]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the invention is shown in FIG. The shim 37 is composed of arc-shaped shims 37A and 37B which are divided into a plurality (two in the figure). These sims
Notches 69, 70 for fitting the assembly bolt 64 and the knock pin 68 for positioning are formed on the inner peripheral side of 37A, 37B. The other configuration is the same as that of the conventional one shown in FIGS. 2 and 3, and corresponding members are denoted by the same reference numerals.

Therefore, when the scroll compressor is assembled, the fixed scroll 1 and the orbiting scroll 2 are engaged with each other to measure the tip clearance, and the shim 37A having a predetermined thickness is selected so that the tip clearance becomes a set value. , 37B, and then loosen the mounting bolt 64 slightly to attach the selected shims 37A and 37B of a predetermined thickness to the specific assembly position of the fixed scroll and the orbiting scroll 2, that is, the tip surface of the leg 15 and the projection 36.
After inserting from the outside in the radial direction into the gap with the tip surface of
Refasten the mounting bolt 64.

In the above embodiment, the shim 37 is divided into two pieces, but it can be divided into two or more pieces.
It goes without saying that the plurality of divided arc-shaped shims can be inserted into any desired location as long as they are the specific assembly locations of the fixed scroll and the orbiting scroll.

[0022]

According to the present invention, the fixed scroll and the orbiting scroll are engaged with each other to measure the tip clearance, and the arc-shaped shim having a thickness corresponding to the tip clearance is selected to temporarily assemble the fixed scroll and the orbiting scroll. The plurality of arc-shaped shims selected in this state can be inserted into the specific assembly location from the outside in the radial direction.

As a result, since it is not necessary to separate the fixed scroll and the orbiting scroll after measuring the tip clearance as in the conventional case, the man-hour and time for assembling the fixed scroll and the orbiting scroll can be greatly reduced. it can.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (A) is A- of (B).
FIG. 3B is a horizontal sectional view taken along line A, and FIG. 6B is a vertical sectional view taken along line BB in FIG.

FIG. 2 is a vertical cross-sectional view of a conventional scroll compressor.

3 is a cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 Fixed scroll 2 Orbiting scroll 64 Assembly bolts 37A, 37B Arc shims 69 Notches for fitting

Front Page Continuation (72) Inventor Masahiro Fukushima 1 at 60 Kutane, Iwatsuka-cho, Nakamura-ku, Nagoya Nakanishi Engineering Co., Ltd.

Claims (2)

[Claims] 1. A fixed scroll and an orbiting scroll are meshed with each other to measure the tip clearance between the tip of the spiral wrap of these scrolls and the inner surface of the end plate of the opposite scroll, and the thickness corresponding to this tip clearance is measured. In a scroll-type compressor in which a shim is inserted into a specific assembly location of the fixed scroll and the orbiting scroll to assemble, a plurality of arc-shaped shims are formed by dividing the shim, and the fixed scroll and the orbiting scroll are temporarily A scroll-type compressor characterized in that, in the assembled state, the arc-shaped shim is inserted into the specific assembly location from the outside in the radial direction thereof. 2. The scroll compressor according to claim 1, wherein a notch for fitting with an assembling bolt is provided on an inner peripheral side of the arc-shaped shim.