JPS62199983A - Revolution type compressor - Google Patents

Abstract

PURPOSE:To provide a moment-free high reliability mechanism for preventing a turn scroll member from revolving on its own axis with a simple construction by providing mutually opposed pins on a movable scroll base plate section and a plate member while both pins engage an annular ring. CONSTITUTION:On the back of a movable scroll base plate section 71 are provided a plurality of movable pins 15 projecting toward a plate member 3, and on the plate member 3 are provided the same number of plate pins 14 as the movable pins 15 projecting toward said section 71. Also, both pins 14, 15 are disposed close to each other while a plurality of rings 16 are disposed to engage both pins 14, 15. And the inner diameter of the ring 16 is set to the revolutional radius of a movable scroll member 7 minus the diameter of pins 14, 15 and the revolution of said member 7 on its own axis are prevented by both pins 14, 15 and the rings 16.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a revolution-type compressor, and particularly to a mechanism for preventing rotation of a movable member thereof, such as a rotation prevention mechanism for a scroll-type compressor. It is applicable and useful.

[Conventional technology]

Conventionally, as a rotation prevention mechanism for a scroll type compressor, there is a mechanism as shown in FIGS. 1 to 3 or FIG. 21 of Japanese Unexamined Patent Publication No. 55-155916. That is, as shown in FIG. 5, grooves 3 and 4 are provided on each end surface of a plurality of sliding contact portions between the plate member 1 and the movable scroll member 2 around the drive unit of the scroll-type pressure 41M machine, and the ball 5 fitted into the grooves 3 and 4, and a rotation prevention mechanism in which cylindrical rollers 6 are fitted into the grooves 3 and 4 as shown in FIG.

[Problem that the invention seeks to solve]

However, in the anti-rotation mechanism using balls, since rotation is prevented by point contact of the balls, the load applied to each ball becomes large, and in order to disperse the load applied to each ball, the number of balls provided is The problem was that it was necessary to increase the number of Further, in a rotation prevention mechanism using cylindrical rollers, a moment is applied to the cylindrical rollers by the plate member and the movable scroll member, causing the cylindrical rollers to tilt. That is, in the state shown in FIG. 6, an upward load is applied to the left side of the cylindrical roller 6 in the figure by the inner wall of the groove 3 of the plate member 1, and a load is applied to the right side of the cylindrical roller 6 in the figure. The inner wall of the groove 4 of the movable scroll member 2 applies a load in the downward direction in the drawing. As a result, a moment is applied to the cylindrical roller 6 in a clockwise direction in the figure, which may cause the cylindrical roller 6 to tilt. As a result, there have been problems in that the reliability of the anti-rotation mechanism is reduced and noise and vibrations are generated.

The present invention has been made in view of the above-mentioned problems, and provides a highly reliable rotation prevention mechanism that has a simple structure and does not apply any moment at the sliding contact portion between the plate member and the movable member of a revolution type compressor. The purpose of the present invention is to provide a revolution type compressor having the following features.

[Means for solving problems]

In order to solve the above problems, the present invention takes the following technical measures. That is, a revolution-type compressor in which the teeth of a fixed member having teeth and a movable member having a base plate provided with teeth mesh with each other, and the movable member performs compression work by orbiting. In this method, grooves having predetermined spaces are provided at a plurality of positions of a plate member that is in sliding contact with the substrate portion of the movable member and the sliding contact portion with the substrate portion of the movable member, and a rotation prevention mechanism is provided within the groove portion. The anti-rotation mechanism includes a cylindrical plate pin that is provided to protrude from the plate member corresponding to each of the grooves, and a cylindrical plate pin that is provided to protrude from the base plate of the movable member that corresponds to the groove, A cylindrical movable pin that revolves around the plate pin as the movable member revolves, and an annular ring that covers each plate pin and movable pin in the groove from the outside and is located in a predetermined space of the groove. It consists of Moreover, the outer peripheral part of the annular ring is
Due to the revolving movement of the movable member, the movable member is positioned within a predetermined space of the groove without coming into contact with the inner wall of the groove.

〔Example〕

Next, embodiments of the present invention will be described using FIGS. 1 to 4.

FIG. 1 is a longitudinal sectional view showing an outline of this embodiment.

In FIG. 1, the shirt (1) includes a shaft portion 101 that rotates in response to an external driving force, a disk portion 102 that is provided continuously with the shaft portion 101 and has a larger outer diameter than the shaft portion 101, and a disk portion 101 that rotates in response to an external driving force.
2 and an eccentric portion 103 which is provided continuously with the shaft portion 101 and is eccentric from the axis of the shaft portion 101 by a predetermined amount ρ. Further, the shaft portion 101 is rotatably supported by the front housing 2 by a bearing 4, the disc portion 102 is rotatably supported by the plate member 3 by a bearing 5, and the eccentric portion 103 is rotatably supported by a bearing 6. A movable scroll member 7 is arranged.

The front housing 2 has a shaft portion 101 of the shaft 1.
A boss-shaped shaft insertion portion 201 into which the shaft portion 101 is inserted is provided to protrude into and outside the housing.
A shaft sealing device 26 is provided between the outer peripheral portion of the shaft insertion portion 201 and the inner peripheral portion of the shaft insertion portion 201 in order to prevent the refrigerant from leaking to the outside along the shaft 1.

The movable scroll member 7 includes a movable scroll base portion 71 that receives the rotational force of the eccentric portion 103 of the shaft l, and teeth that are provided on one side of the movable scroll base portion 71 and mesh with the fixed scroll tooth portions 81 of the fixed scroll member 8. Section 72
A boss portion 711 into which the eccentric portion 103 of the shaft 1 is inserted is provided on the other side of the movable scroll substrate portion 71 approximately at the center thereof. Further, the movable scroll tooth portion 72 has a spiral shape and is formed in three stripes.

The fixed scroll member 8 is attached to the rear housing 10 by bolts 9.
is fixed by a fixed scroll board section 81, and is provided on one side of this fixed scroll board section 81,
It is composed of a movable scroll tooth section 72 and a fixed scroll tooth section 82 that meshes with each other. The working chamber P is formed by the fixed scroll tooth portion 82 and the movable scroll tooth portion 72 meshing with each other.

The thrust bearing 12 is located at the boss portion 71 of the movable scroll member 7.
1 and the disk portion 102 of the shaft 1, the thrust bearing 13 is provided between the disk portion 102 of the shaft 1 and the shaft insertion portion 201 of the front housing 2, and the thrust bearing 13 The force acting on the member 7 in the left direction in FIG.
02 and is received by the front housing 2 via a thrust bearing 13.

The plate member 3 is provided at a position where it slides into sliding contact with the side surface opposite to the side surface on which the movable scroll tooth portion 72 of the movable scroll base portion 71 of the movable scroll member 7 is provided, and the plate member 3 is provided at a position where the plate member 3 is in sliding contact with the side surface opposite to the side surface where the movable scroll tooth portion 72 is provided. Fixed by Further, a plate boss portion 32 having a stepped shape into which the disc portion 102 of the shaft l and the boss portion 711 of the movable scroll member 7 are inserted is provided at the center.

A suction chamber 17 is formed between the outermost periphery of the movable scroll member 7 and the inner wall of the rear housing 10.
A suction port (not shown) that connects to the evaporator (not shown) of the refrigeration cycle is open in the holder. Furthermore, a discharge port 18 that communicates the working chamber P with a first discharge chamber 22 (to be described later) is bored in a substantially central portion of the fixed scroll base portion 81 of the fixed scroll member 8, and a discharge valve 19 is provided in the discharge port 18. The discharge valve 19 is fixed to the fixed scroll member 8 by a valve holder 20 and a bolt 21.

A first discharge chamber 22 is formed between the back surface of the fixed scroll substrate portion 81 of the fixed scroll member 8 and the rear housing 10, and the first discharge chamber 22 communicates with the second discharge chamber 24 through a communication hole 23. There is. Further, the rear housing 10 is provided with a discharge port 25 that opens into the second discharge chamber 24, and this discharge port 25 is connected to a condenser (not shown) of the refrigeration cycle.

a movable scroll substrate portion 71 of the movable scroll member 7;
A rotation prevention mechanism for the movable scroll member 7 is provided between the movable scroll substrate portion 71 and one side surface of the plate member 3 in sliding contact.

Next, this rotation prevention mechanism will be explained using FIGS. 2 to 4. 2 is a cross-sectional view taken along the line ■--■ in FIG. 1, FIG. 3 is an enlarged view of a portion A in FIG. 1, and FIG. 4 is a cross-sectional view taken along IV-IV in FIG. As shown in FIG. 2, six circular grooves 31 are provided at 60° intervals on the inner peripheral side of the side surface of the plate member 3, and each of the circular grooves 31 has a predetermined space. Further, as shown in FIG. 3, a plate pin hole 312 is bored at the approximate center of the bottom surface 311 of each of the circular grooves 31, and a cylindrical plate pin 14 is inserted into the plate pin hole 312. It is press-fitted. Also, movable bottle holes 712 are bored in the side surfaces of the movable scroll member 7 corresponding to the circular grooves 31, and each movable bottle hole 712 has a cylindrical movable pin having the same outer diameter as the plate pin 14. 1
5 is press-fitted. The plate pin 14 and the movable pin 15 are located adjacent to each other at their respective tip ends. Furthermore, an annular ring 16 is disposed on the outer circumferential side of the adjacent plate pin 14 and movable pin 15 so as to cover the plate pin 14 and movable pin 15. 16 is located within a predetermined space of the circular groove 31 without coming into contact with the side surface 312 of the groove 31.

Here, as shown in FIG. 4, the diameter of the plate pin 14 and the movable pin 15 is Dl, and the inner diameter of the annular ring 16 is D1.
2, the relationship DI<D2〆2 holds true, and the relationship ρ=D2-Di holds true for the eccentricity ρ of the shaft l.

Next, the operation of this embodiment will be explained. In the scroll compressor shown in FIG. 1, when the shaft 1 is rotated by receiving an external driving force, the movable scroll member 7 receives an eccentric movement of an eccentric amount ρ from an eccentric portion 103 of the shaft 1. Here, the plate pin 14 and the movable pin 15 are covered by the annular ring 16 from the outside, and the plate pin 14 and the movable pin 15 are in line contact with the inner peripheral surface of the annular ring 16. Therefore, the movable pin 15 is in line contact with the annular ring 16.
The annular ring 16 is regulated by the plate pin 14 in line contact. In other words, the movable pin 15 is regulated by the plate pin 14 via the annular ring 16,
The rotational movement of the movable scroll 7 is prevented. Accordingly, as the movable scroll member 7 revolves, the movable pin 15 press-fitted into the movable scroll base plate 71 of the movable scroll member 7 also changes from the plate pin 1 press-fitted into the plate member 3.
4 while being regulated by an annular ring 16 with eccentricity ρ. That is, the movable member 7 performs only a revolution movement while being prevented from rotating on its axis.

As the movable scroll member 7 revolves without rotating in this manner, the volume of the working chamber P fluctuates, and refrigerant is sucked into the suction chamber 17 through a suction port (not shown). This refrigerant is confined and compressed within the working chamber P formed by the fixed scroll teeth 81 and the movable scroll teeth 71, and is led to the first discharge chamber 22 through the discharge port 18, and further from the first discharge chamber 22. The second
It is guided to the discharge chamber and discharged from the discharge port 25.

〔Effect of the invention〕

According to the present invention, it has become possible to prevent the rotation movement accompanying the revolution movement of the movable member by using the rotation prevention mechanism configured with a simple configuration of a movable pin, a plate pin, and an annular ring. Furthermore, since this rotation prevention mechanism prevents the movable member from rotating through line contact, it has become possible to reduce the load applied to each rotation prevention mechanism. Furthermore, since this anti-rotation mechanism is located within the predetermined space of the groove provided in the sliding part even when the movable member revolves, it is not subjected to bending moment by the inner wall of the groove, and is always in the correct position. Since the state can be maintained, the reliability of the rotation prevention mechanism can also be improved.

[Brief explanation of drawings]

1 to 4 relate to an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of this embodiment, FIG. 2 is a sectional view taken along the line ■-■ of FIG. 1, and FIG. FIG. 4 is an enlarged view of part A in the figure, FIG. 4 is a sectional view taken along IV-IV in FIG. 3, FIGS. Figure 6 shows the one using cylindrical rollers. DESCRIPTION OF SYMBOLS 1... Shaft 103... Eccentric part, 2... Front housing, 3... Plate member, 31... Circular groove. 7... Movable scroll member, 71... Movable scroll base portion, 72... Movable scroll tooth portion, 8... Fixed scroll member, 82... Fixed scroll tooth portion, 1
0...Rear housing, 14...Plate pin, 1
5... Movable pin, 16... Annular ring.

Claims (1)

[Scope of Claims] A housing; a shaft that is pivotally supported by the housing, rotates in response to an external driving force, and has an eccentric portion that is eccentric from the axis by a predetermined amount; a fixing member having a portion, a base plate receiving the rotational force of the eccentric portion of the shaft, and a tooth portion provided on one side of the base plate and forming an operating chamber by meshing with the tooth portion of the fixing member. a movable member provided in the housing; a suction port for sucking gas into the working chamber; a discharge port for discharging compressed gas in the working chamber; and a movable member provided in the housing. a plate member that is in sliding contact with the substrate portion of the movable member; groove portions having predetermined spaces provided at a plurality of positions in the sliding contact portion between the substrate portion of the movable member and the plate member; and the plate member corresponding to each of the groove portions. one cylindrical plate pin protruding from the base plate of the movable member corresponding to each of the grooves; a cylindrical movable pin that revolves; and an annular ring that covers each plate pin and movable pin in the groove from the outside and is located in a predetermined space of the groove, the outer peripheral part of the annular ring being connected to the movable member. A revolution type compressor, characterized in that due to the revolution movement of the compressor, the compressor is positioned within a predetermined space of the groove without coming into contact with an inner wall of the groove.