JPH02227580A - Oldham joint of scroll compressor etc. - Google Patents

Abstract

PURPOSE:To facilitate fabrication of an Oldham joint and suppress the cost therefore by forming the Oldham joint from a ring-shaped member, which is provided with radially directed notches along the circumference, and a key member having folded pieces to be detained with the notches. CONSTITUTION:A ring 1, which has a constant width B in the radial direction and also a constant width in the axial direction, is provided with four notches 3 at 90-deg. intervals in the circumferential direction. Each notch 3 is formed rectangular from the bore 4 of the ring 1 outward in the radial direction. Each key member 2 fixed to this ring 1 is formed from a band sheet having a width smaller than the width of the notch 3 into such a channel shape that folded pieces are bent in two positions in longitudinal direction, and a hole 8 is formed in key part 7 capable of being seated on the end face 6 of the ring 1. After the key members 2 are seated on the notches 3, a screw 10 inserted through holes 8, 9 are fastened to consolidate the two 1, 2. Thus An Oldham joint is accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an Oldham joint for scroll presses and the like.

(Prior art) An involute-shaped orbiting scroll driven by an eccentric shaft is oscillated relative to a fixed scroll, and the compression space defined between these scrolls is gradually reduced toward the center of the involute to keep the compressed medium at a constant pressure. Boost the pressure,
There is a scroll compressor configured to discharge a compressed medium from a discharge port formed at the center of the involute.

In this type of compressor, the eccentric shaft and the orbiting scroll are connected by an Oldham joint to allow the orbiting scroll to revolve while preventing rotation.

By the way, as shown in Fig. 6, as an Oldham joint, pivot pins C are attached to one end face of ring a at two positions in the diametrical direction, and pivot pins C are attached to the other end face d in a direction orthogonal to the pivot pin C on the one end face. Attach the pivot bins C at two positions, and attach the key member e fitted to each pivot bin C to the ring a.
"Joint parts for swing machines" integrated with screws fixed to (
There is a proposal in Japanese Patent Laid-Open No. 53-34107).

(Problems to be Solved by the Invention) However, forming a fitting hole for the pivot pin in the ring and fitting the pivot pin reduces productivity, and it is difficult to provide a lower cost Oldham joint. However, this remained an issue.

There is also a demand for an Oldham joint that rotates at high speed to be as light as possible to reduce inertia and vibration during high speed rotation.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a lower cost Oldham joint for scroll pressure mts, etc.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a method in which a radial notch is formed on the circumferential surface of a ring having a constant width in the radial direction along the circumferential direction. An Oldham joint for a scroll compressor, etc., is made of a ring body formed with a ring body, and an 'r-member having a folded piece that engages with the notch and is seated on the end face of the ring body and fixed integrally with a screw or the like. It is composed of

(Function) When the folded piece of the key member is engaged with the notch of the ring body and the key member is fixed to the ring body with a screw etc., the folded piece corresponding to the notch is connected to the fixing point between the ring body and the key member. Conversely, the fixing point between the ring body and the key member functions as a rotation stopper for the folded piece relative to the notch. Therefore, it is possible to provide a low-cost Oldham joint in which positioning of the key member with respect to the ring body is easy and fixing of the ring body and the key member is extremely simple.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

1 shown in Figure 1 is a constant width B in the radial direction along the circumferential direction.
The ring body 2 is a key member that is integrally fixed to the ring body 1 and has a constant thickness H in the axial direction.

In the embodiment, notches 3 are formed in the ring body 1 at two positions in the diametrical direction of the ring body 1 and at two positions in the diametrical direction orthogonal to the diametrical direction connecting the two positions. Each notch 3 is formed as a rectangular notch extending radially outward from the inner circumferential surface 4 of the ring body 1 .

The key member 2 is formed from a strip plate having a width less than the width of each of the notches 3. That is, as shown in FIGS. 2 and 3, the strip is bent at right angles at two positions in the longitudinal direction, and the folding plate is fitted onto one end of the strip along the thickness direction of the ring body 1. While forming the piece 5, at the same time, on the other end side, a key part 7 is formed which is seated on the end face 6 of the ring body 1 from the notch 3 to the outside in the radial direction, and furthermore, from the notch 3 to the outside in the radial direction, a key part 7 is formed. It is constructed by forming a folded piece 5 along the outer peripheral surface of the ring body 1 on one side. That is, the key member 2 is formed into a U-shaped cross section with folded pieces 5 at both ends.

The folded pieces 5 are engaged with the notches 3 of the ring body 1 and the key member 2, and when the key part 7 is seated on the ring body 1, the key part 7 and the ring body 1 are penetrated. to form holes 8.9 constituting a series of through holes, respectively,
A female thread is formed in either one of the holes 8 and 9.

Therefore, when the folding pieces 5 are engaged with each of the notches 3 and the screws 10 are inserted and screwed together from the opposite side of the female threaded hole, the key member 2 is integrally fixed to the ring body 1.

By the way, the ring body l can also be formed by cutting, but in this embodiment, in order to improve mass productivity, it is formed by pressing (punching, piercing, bending, etc.).
The material of the ring body 1 is made of aluminum, an aluminum-based material, a thin steel plate, or the like in order to reduce the weight of the ring body 1 and minimize the inertial force (GD'') during high-speed rotation.

On the other hand, the key member 2 can also be formed by cutting, but it is formed by pressing from a material with high wear resistance. In addition, the key member 2 is required to have high surface accuracy for the contact portion with the above-mentioned orbiting scroll (the end surface with respect to the direction of one rotation of the upper surface), so in order to satisfy this requirement,
Before pressing the key member 2 or after fixing it to the ring body 1, the contact portion with the orbiting scroll is machined.

In addition, as another embodiment of the key member 2, as shown in FIGS. 4 and 5, a folded piece 5 is formed on one end side of the band plate to fit along the thickness direction of the ring body. At the same time, a key portion 7 may be formed on the other end side to be seated on the end face of the ring body from the notch 3 to the outside in the radial direction.
That is, the key member 2 is formed in a cross-sectional shape having a folded piece 5 at one end. Further, the formation position of the notch 3 is formed on the outside in the radial direction of the ring body 1, the hole 9 is formed on the outside in the radial direction, and the notches 3 and 3 are formed alternately in the radial direction with respect to the circumferential direction. Of course, it is also possible to form holes 9.

Therefore, when the folded piece 5 of the key member 1 is engaged with the notch 3 of the ring body 1 and the key member 3 is fixed to the ring body 1 with a screw 10 or the like (a rivet may be used), the folded piece 5 corresponding to the notch 3 However, the fixed point between the ring body 1 and the key member 2 serves as a rotation stopper, and conversely, the fixed point between the ring body 1 and the key member 2 functions as a rotation stopper for the folded piece 5 relative to the notch 3. On the other hand, as for the Oldham joint, by reducing the weight of the ring body 1 as described above, the inertia force during high-speed rotation is reduced, and vibration during high-speed rotation is greatly reduced.

In this way, the positioning of the key member 2 with respect to the ring body 1 is easy, and the materials of the ring body 1 and the key member 2 can be freely selected according to the purpose and application, so that the ring body 1 and the key member 2 can be fixed. can provide an extremely simple, low-cost, and high-performance Oldham joint.

[Effects of the Invention] As is clear from the above explanation, the present invention exhibits the following excellent effects.

A ring body having a notch in the radial direction formed on the circumferential surface of the ring having a constant width in the radial direction along the circumferential direction, and a folded piece that engages with the notch, and is seated on the end face of the ring body. If an Oldham joint for a scroll compressor or the like is constructed from a key member that is integrally fixed with a screw or the like, manufacturing and assembling thereof can be extremely simplified and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a preferred embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a perspective view showing an embodiment of the key member, FIGS. FIG. 5 is a partial sectional view and a perspective view showing another embodiment of the key member, and FIG. 6 is a perspective view showing a conventional example. In the figure, 1 is a ring body, 2 is a key member, 3 is a notch, and 5 is a folded piece.

Claims (1)

[Claims] 1. A ring body having a notch in the radial direction formed on the circumferential surface of the ring having a constant width in the radial direction along the circumferential direction, and a folded piece that engages with the notch, and is seated on the end face of the ring body. An Oldham joint for scroll compressors, etc., consisting of a key member that is integrally fixed with screws, etc.