JPS63106385A - Manufacture of oldham's coupling for scroll compressor - Google Patents

Abstract

PURPOSE:To economize material cost and improve productivity by forming a key piece by bending a ring body outwardly after punching out the key piece integrally with the ring body inside said ring body, in Oldham's coupling. CONSTITUTION:In the manufacture of a key piece 30 which slides in the key way 29 on an edge plate 21 of an Oldham's coupling 27 for preventing rotation of a swirl scroll 15, the useless taking-in of material can be reduced by the integral punching-out with a ring body 28 inside said ring body 28. Then, the difference of height is formed from a key piece 32 which slides in a key way 31 on a frame 8 by bending the key piece 30 outwardly from the ring body 28, and the upper surface of the frame 8 is made so as to permit the revolution of the swirl scroll 15. Since the Oldham's coupling can be formed through press work, and the height difference can be formed on the key piece by only bending the key piece, material can be economized, and productivity can be improved.

Description

[Detailed description of the invention] (a) Field of industrial use.

The present invention relates to a method of manufacturing an Oldham joint for a scroll compressor in which an orbiting scroll revolves around a fixed scroll so as not to apparently rotate.

(b) Conventional technology A conventional scroll compressor is, for example, Japanese Patent Application Laid-open No. FJE59-18.
It is configured as shown in Japanese Patent No. 3096.

Here, a conventional example will be explained with reference to this publication. In FIGS. 19 and 20, reference numeral 50 denotes a closed container, and a frame 51 is disposed within this container. A scroll compressor section 52 is disposed below this frame, and a scroll compressor section 52 is disposed above the frame 51. A single-motor section 53 for driving a scroll compressor section 52 is disposed. The scroll compressor section 52 includes a fixed scroll 54 and an orbiting scroll 55 disposed above the fixed scroll. The fixed scroll 54 has a disc-shaped end plate 56.

An annular wall 5T protruding from the periphery of one side of the end plate, a spiral wrap 58 protruding from a portion surrounded by the annular wall at approximately the same height as the annular wall, and an end plate 56. It is composed of a discharge port 59 provided in the center and a suction port 60 provided in the annular wall 57. And fixed scroll 54
is a suction pipe in which the circumferential edge of the annular wall is fixed to the circumferential edge of the frame 510 with the protruding direction of the annular wall 57 and the wrap 58 facing upward, and the suction port 60 is provided by passing through the airtight container 50 and the annular wall 57 in an airtight manner. 61. On the other hand, the orbiting scroll 55 has an end plate 62 having an outer diameter larger than the inner diameter of the annular wall 5T, and a spiral wrap protruding from one surface of the end plate at a height approximately equal to the height of the fixed scroll 540 wrap 58. 63, and a pin 1164 protruding from the center of the other surface of the end plate 62. The orbiting scroll 55 is located below the wrap 63 in the projecting direction, and the wraps 58 and 63 engage with each other.

The end plate 620 is attached so that its periphery is in sliding contact with the end surface of the annular wall 57, and this attached state is maintained by an Oldham joint 65 provided between the end plate 62 and the frame 51. The Oldham joint 65 has key pieces 66 and 66 fixed on the upper surface of the end plate 62 and on both sides of the pin portion 64 so as to be located on the same line, and on the lower surface of the frame 51 and the key pieces 66 and 66 fixed on the same line. Key pieces 67 and 67 are fixed on a line perpendicular to the arrangement line of the pieces 66 and 66, and mounting grooves 68 and 68 into which these key pieces are respectively fitted with minute gaps.

It is composed of a ring body TO having 69.69 on the upper and lower surfaces. A bearing hole 71 eccentric to the axis of the pin portion 64 is provided in the frame 51 so as to pass through the frame 51 in the vertical direction. This bearing hole has a larger diameter at a portion located on the bottle portion 64 side. A rotating shaft T2 of the electric motor section 530 is rotatably supported within the bearing hole T1. A large diameter portion 73 is formed in the rotating shaft 72 at a portion located in the large diameter portion of the bearing hole 710, and a hole 74 into which the pin portion 64 fits is formed in the large diameter portion.
is formed. An oil supply pipe 76 is connected to the upper part of the frame 51 by a pump mechanism 75.

In a scroll compressor with this structure, the rotating shaft 720 large diameter portion 7
3, the pin portion 64 of the orbiting scroll 55 is fitted into the hole 74 provided in the rotary scroll 55, the orbiting scroll is driven by the rotating shaft 72, and the orbiting scroll 55 is prevented from rotating relative to the fixed scroll 54 by the Oldham joint 65. The fixed scroll and the orbiting scroll compress the refrigerant.

(・→ The problem that the invention seeks to solve However,
The Oldham joint 65 has a ring body 70 and a key piece 66, 66, 67 in the mounting groove 68, 68, 69, 69 of this ring body.
．． 67, the number of parts increases, resulting in poor productivity. Furthermore, when attempting to reduce the number of parts of the Oldham joint 65, the ring body and the key piece are integrally formed by cutting, which further deteriorates productivity.

In order to solve the above problems, this invention forms an Oldham joint by punching, and at the time of punching, the key piece is punched inside the ring body, and the material is taken out at the time of punching (to avoid waste). This invention is intended to improve productivity as well as to improve productivity.) This invention provides an Oldham coupling that prevents the orbiting scroll from apparently rotating relative to the fixed scroll. An Oldham joint is formed by punching out a key piece integrally with the ring body inside the ring body, and then bending the key piece toward the outside of the ring body.

(e) Effect This invention is constructed as described above, and includes a ring body, which is an Oldham coupling that prevents the orbiting scroll from apparently rotating relative to the fixed scroll, and a key piece inside the ring body. This key piece is cut out in one piece and then bent towards the outside of the ring body to avoid wasting material for the Oldham joint, and to make it easier to form by press working. be.

(f) Examples The present invention will be explained below based on the examples shown in FIGS. 1 to 6.

Reference numeral 1 denotes a closed container, and this container is composed of a cylindrical case 3 to which an electric motor section 2 is attached, an upper lid body 5 to which a scroll compressor section 4 is attached, and a lower lid body 7 having an oil reservoir 6 in which oil is stored. has been done.

A frame 8 fixed to the scroll compressor section 4 is mounted on the upper end surface of the cylindrical case 3. A bearing portion 10 for pivotally supporting the rotating shaft 9 is integrally provided at the center of the frame. The electric motor part 2 has a built-in winding 11 and is housed in a cylindrical case 3.
The rotor 13 is comprised of a stator 12 attached to the inner wall of the stator, and a rotor 13 inserted into the rotating shaft 9 inside the stator. The scroll compressor section 4 is composed of a fixed scroll 14 and an orbiting scroll 15. Fixed scroll 14
is a disc-shaped end plate 16 that partitions the inside of the airtight container 1 into upper and lower parts, an annular wall 17 protruding from the periphery of one side of this end plate, and an end plate 16 that is erected and surrounded by this annular wall. Spiral wrap 1 consisting of an impoliate shape or a curve similar to this
It consists of 8.

A discharge port 19 is provided at the center of the end [16] of the fixed scroll 14. The fixed scroll 14 is fixed to the peripheral edge of the frame 80 with bolts 20, with the annular wall 17 and the wrap 18 extending downward. The orbiting scroll 15 is an annular wall 1 of the fixed scroll 14.
7, an end plate 21 having an outer diameter smaller than the inner diameter of the end plate 21, a spiral wrap 22 standing upright on one side of the end plate and consisting of an involute shape or a curved line approximating it, and a spiral wrap 22 on the other side of the end plate 21. It is composed of a bottle part 23 protruding from the center. The orbiting scroll 15 is configured such that the wrap 22 is directed upward so that the wrap engages with the wrap 18 of the fixed scroll 14. Reference numeral 24 denotes a boss hole drilled at the tip of the rotary shaft 9 into which the bin portion 23 of the orbiting scroll 15 is inserted, and the center of this boss hole is provided eccentrically from the axis of the rotary shaft 9. Rotating shaft 9 surrounding boss hole 24
A balance weight 25 is integrally provided in the. This balance weight is a space 26 formed by the frame 8.
rotating inside. Reference numeral 27 denotes an Oldham joint that makes the orbiting scroll 15f revolve around the fixed scroll 14 without apparently rotating.
B, and the lower surface of the end plate 21 of the orbiting scroll 15, and
A key piece 30.30 is slidably inserted into key grooves 29.29 provided on the same line on both sides of the bottle part 23, and a key piece 30.30 is inserted into the key groove 29.29 on the upper surface of the frame 8 and the key groove 29.29 is provided on the upper surface of the frame 8. Keyway 31.31 provided on a line perpendicular to the arrangement line of
The key piece 32.32 is slidably inserted into the key piece 32.32. The Oldham joint 2T includes a ring body 28, a key piece 30, which is provided inside the ring body and slides in the key grooves 29, 21 of the end plate 21, and a key piece 30, which is provided outside the ring body 28 and which slides into the key grooves 29, 21 of the end plate 21. A key piece 32.32 which slides in a groove 31.31 is integrally punched out of a plate.

A key piece 30 is punched out inside the ring body 28.
30 is formed by bending upward toward the outside of this ring body. 33 is a suction pipe, and this suction pipe is connected to the electric element 2.
A suction passage 34 that guides the refrigerant to the scroll compressor section 4 is provided on the outer periphery of the frame 8 that opens into the closed container 1 below.
is provided. Reference numeral 35 denotes a discharge pipe attached to the upper cover body 5, and this discharge pipe opens into an upper space 36 formed by the upper cover body 5 and the end plate 16 of the fixed scroll 14.

In the method for manufacturing the Oldham joint for a scroll compressor configured as described above, when the electric motor section 2 is rotated, its rotational force is transmitted to the orbiting scroll 15 via the rotating shaft 9. That is, the orbiting scroll 15 is driven by a bottle portion 23 inserted into a boss hole 24 of the rotating shaft 9 eccentrically with respect to the rotating shaft, and is also driven by a key and mushrooms 29, 29 of the end plate 21.
and the key groove 31.31 of the frame 8 and the key piece 30.30.
.

32 and 32 are slidably attached to the Oldham joint 27, which allows the scroll to revolve around the fixed scroll 14 without apparently rotating. The fixed scroll 14 and the orbiting scroll 15 gradually contract from the outside to the inside of the airtight space formed by these scrolls, and the suction pipe 33
Flows into the closed container 1 from the air, passes through the electric motor section 2, and enters the frame 8.
The refrigerant flowing through the suction passage 34 on the outer periphery of the refrigerant is compressed. This compressed refrigerant is discharged from the discharge port 19 of the end plate 16 of the fixed scroll 14 into the upper space 36, and then discharged from the discharge pipe 35 to the outside of the closed container 1.

Oldham joint 27 that prevents rotation of the orbiting scroll 15
is a key piece 30. which slides in the key groove 29.29 of the end plate 21.
30 is punched out inside the ring body 28 and integrally with this ring body so that there is no waste in material removal. Further, the key piece 30.30 punched inside the ring body 28 is bent toward the outside of this ring body, so that the key piece 32.30 slides in the key groove 31.31 of the frame 8.
A difference in height is provided so that the orbiting scroll 15 on the upper surface of the frame 8 can revolve.

In addition, in the above explanation, only key piece 30.30 & I
Although it has been explained that the punch is punched inside the J-ring body 28, as shown in FIGS. 7 to 10, the key piece 37° 37, 38, 38 & Needless to say, all of the keys may be punched out inside the ring body 39 and the punched key pieces may be bent. In addition, as shown in FIGS. 11 to 18, the key piece 40.40
, 41.41 may be shifted from the same line.

(g) Effects of the Invention The method for manufacturing an Oldham joint for a scroll compressor of the present invention provides an Oldham joint that prevents the fixed scroll from apparently rotating like an orbiting scroll, and integrates the Oldham joint with the ring body inside the ring body. After punching out the key piece, the key piece provided inside is bent toward the outer circumference of the T-ring body to form an Oldham joint, so it has the following effects.

■ Can be formed by Oldham joint press processing.

■ Since the key piece is punched out inside the ring body, wasted material can be prevented.

■ By simply bending the key piece outward, it is possible to equalize the height difference between the Φ-pieces inserted into the key grooves of separate parts.

[Brief explanation of the drawing]

1 to 6 show the present invention, FIG. 1 is a longitudinal sectional view of a scroll compressor, FIG. 2 is an exploded perspective view of the scroll compressor section, and FIG. 3 is an Oldham joint immediately after being punched out. The plan view and Fig. 4 are the same side views, Fig. 5 is the plan view of the folded Oldham joint, and Fig. 6 is the same (the side view and Figs. 7 to 10 are the other embodiments of the Oldham joint). Show, 7th
The figure is a plan view of the Oldham joint immediately after punching, FIG. 8 is a side view, FIG. 9 is a plan view of the bent Oldham joint, FIG. 10 is a side view, and FIGS. 11 to 14.
The figures show other embodiments of Oldham's joint, in which Fig. 11 is a plan view of the Oldham's fitting immediately after being punched, Fig. 12 is a side view of the same, and Fig. 13 is a plan view of the Oldham's fitting that has been bent. Figure 14 is a side view, and Figures 15 to 1
FIG. 8 shows another example of the Oldham joint, FIG. 15 is a plan view of the Oldham joint immediately after being punched, FIG. 16 is a side view of the same, and FIG. 17 is a plan view of the Oldham joint after being bent. Figure 18 is also a side view, Figure 19 and 2
0 shows a conventional example, FIG. 19 is a longitudinal sectional view of a scroll compressor, and FIG. 20 is a perspective view of an Oldham joint. DESCRIPTION OF SYMBOLS 1... Airtight container, 2... Electric motor part, 4... Scroll compressor part, 8... Frame, 14...
Fixed scroll, 15... Orbiting scroll,
16, 21... End plate, 18.22... Wrap,
27...Oldham joint, 28...Ring body, 2
9.29.31.31...Keyway, 30.30.3
2.32...Key piece.

Claims (1)

[Claims] 1. A fixed scroll which houses a frame, a compressor section and an electric motor section disposed on both sides of the frame in an airtight container, and has an involute wrap erected on the end plate of the compressor section, and this fixed scroll. and an orbiting scroll with an involute wrap standing upright on end plates that face and engage with each other, an Oldham joint is provided to prevent the orbiting scroll from apparently rotating relative to the fixed scroll, and this Oldham joint is connected to a ring. In the Oldham joint for a scroll compressor, the Oldham joint is composed of a ring body and a key piece that is integrally provided with the ring body and is attached to a key groove provided in the end plate of the orbiting scroll and the frame. A method for producing an Oldham joint for a scroll compressor, characterized in that a key piece is punched out integrally with the ring body inside the ring body, and then the key piece is bent toward the outside of the ring body.