JPS62147072A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To prevent wear and damage due to lopsided contact between an Oldham's ring and a block by forming plural oil sumps on the top of a projecting part for receiving the key of said Oldham's ring, formed on a block and connecting said oil sumps to each other by means of a groove. CONSTITUTION:A projecting part 3a having a groove 3b for receiving the key 6b of an Oldham's ring 6, is formed on the top of the block 3 of a scroll compressor, while oil sumps 7 are formed on both sides of the groove 3b of the projecting part 3a respectively. Both of the oil sumps 7 are connected to each other via a groove 8. Thereby, the supporting area between the bottom face of the annular part of the Oldham's ring 6 and the projecting part 3a of the block can be increased, while oil can be stably fed, preventing the generation of damage due to wear in a sliding part.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a scroll compressor having a scroll compression mechanism housed in a closed container.

The structure of a conventional scroll compressor is shown in FIG. 3, and the main parts are a fixed scroll 1. Orbiting scroll 2゜block 3
．． Anti-rotation mechanism 4. It consists of a drive mechanism 6, of which the anti-rotation mechanism 4 serves to rotate the orbiting scroll 2 while preventing the rotation of the orbiting scroll 2, and its conventional structure is shown in FIGS. 3 to 6. FIG. 6 is an enlarged view of cross section AA in FIG. 3. A key groove 2C is provided in a straight line on the back surface of the orbiting scroll 2, and a key 6a is provided on the upper surface of the Oldham ring 6 at a position opposite to the key groove 2C so that it can slide, and a key groove 2C is provided on the opposite surface of the Oldham ring 6 at a position orthogonal to the key 6a. A similar key 6b is provided on the block 3, and a protrusion 3a is provided in the radial direction on the block 3 at a position opposite to the key 6b.
It is a mechanism that prevents rotation by allowing the keyway 3b on the top surface to slide and the key 6b. The key 6b, which is the protrusion of the Oldham ring 6, and the keyway 3b of the protrusion 3a of the block 3 are slidable, and in order to support the weight of the Oldham ring 6, the lower end surface of the key 6b and the keyway 3b of the block 3 are slidable. In order to prevent the orbiting scroll 2 from rotating, both side surfaces of the key 6b and the side surfaces of the key groove of the protrusion 3a are in a relationship such that the end faces slide in contact with each other. Further, in the rotation prevention mechanism 4, a gap is required between the key 6b and the key groove 3b in order to allow the key 6b and the key groove 3b of the protrusion 3a to slide.

Problems to be Solved by the Invention Due to the gap between the key 6b of the conventional example and the keyway 3b of the block 3, the Oldham ring 6 tilts as shown in FIG. 3b hits unevenly, increasing local surface pressure and causing a prying phenomenon. Since the lower end surface and side surface of the key 6b of the Oldham ring 6 are surfaces that slide on the key groove 3b of the block 3, high machining accuracy was still required for both the lower end surface and the side surface of the key groove 3b. For this reason, productivity was poor, and there were also problems in terms of reliability, such as the sliding surface seizing if the conditions became even slightly severe.

In view of the above problems, the present invention suppresses the allowable amount of inclination of the Oldham ring, prevents uneven contact, prevents an increase in local surface pressure, eliminates the occurrence of prying phenomenon, and prevents sliding between the Oldham ring and the block protrusion. Apply even and sufficient lubrication to all parts. The purpose of this method is to improve the productivity of machining grooves in protrusions of blocks.

Means for Solving the Problems In order to achieve the above object, the present invention has the annular lower surface of the Oldham ring and the upper surface of the protrusion slide, a plurality of oil reservoirs are provided on the upper surface of the protrusion, and the oil reservoir The structure is such that a groove is provided to connect the two.

By sliding the upper surface of the working block protrusion and the annular lower surface of the Oldham ring into contact with each other, the inclination of the Oldham ring can be kept small. Furthermore, the presence of grooves connecting the oil reservoirs and a plurality of oil reservoirs on the block protrusion so that oil supply is not hindered by the sliding of the Oldham ring makes the sliding surface of the Oldham ring and the block protrusion uniform.
Moreover, good lubrication can be achieved, and the sliding area can be reduced. Furthermore, this configuration facilitates the processing of Oldham's ring, thereby improving productivity.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 shows a sliding part of an Oldham ring 6 of a scroll compressor in one embodiment of the present invention. The other configurations are the same as those of the prior art, so their explanation will be omitted. The dead weight of the Oldham ring 6 is received by the upper surface of the protrusion 3a of the block 3 and the annular lower surface of the Oldham ring 6, and the rotation of the scroll is prevented by sliding of the key eb and the side surface of the keyway 3b. As a result, the inclination of the Oldham ring 6 can be suppressed by the gap between the key b and the keyway 3b and the wide dimension (m dimension) of the block protrusion 3a. It is possible to suppress the inclination of the structure, eliminate problems such as prying, and improve reliability. Further, as described above, it is possible to improve workability. Furthermore, as shown in the top view of the block protrusion 3a in FIG. 2, a plurality of oil reservoirs 7 and oil reservoirs 7 are provided on the upper surface of the protrusion 3a so that oil supply is not hindered by the sliding of the Oldham ring 6. By providing the connecting groove 8, the sliding area between the annular lower surface of the Oldham ring 6 and the upper surface of the block protrusion 3a can be reduced, and stable lubricating can be performed during sliding, preventing seizure etc. can.

Effects of the Invention As described above, the present invention allows the annular lower surface of the Oldham ring to slide on the upper surface of the protrusion provided on the block, and also prevents oil supply from being obstructed by the sliding of the Oldham ring on the upper surface of the protrusion. By providing multiple oil sump sections and grooves that connect the oil sump sections, the permissible amount of inclination of the Oldham ring is suppressed, uneven contact is prevented, local surface pressure is prevented from increasing, and the system eliminates the prying phenomenon. Furthermore, by reducing the sliding area, uniform and sufficient oil can be supplied to the sliding movement. It is still possible to improve the productivity in machining the groove of the push-pull protrusion, and the practical effects thereof are significant.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a scroll compressor showing an embodiment of the present invention, FIG. 2 is a top view of the same FIG. 1, FIG. 3 is a cross sectional view of a conventional scroll compressor, and FIG. The figure is a bottom view of the orbiting scroll in Fig. 3, Fig. 6 is a perspective view of the Oldham ring in Fig. 3, Fig. 6 is a sectional view taken along the line AA' in Fig. 3, and Fig. 7 is a perspective view of the Oldham ring in Fig. 3. FIG. 6 is a cross-sectional view of the Oldham ring corresponding to FIG. 6 in a tilted state. 1... Fixed scroll, 2... Mark/orbiting scroll, 2a... Wrap of orbiting scroll, 2b
...End face, 3...Block, 3a...
...Block protrusion, 4... Rotation prevention mechanism, 6... Oldham ring, 7... Oil sump, 8... Groove. Name of agent: Patent attorney Toshio Nakao and 1 other person 3a
-11 floc pod development 6---Ortashi N link 7----Sako Rukil Fig. 3 2b 2ku Fig. 4 b

Claims (1)

[Claims] An orbiting scroll formed with a spiral wrap standing upright on the end face, a fixed scroll having substantially the same shape that engages with the orbiting scroll, an anti-rotation mechanism that prevents the orbiting scroll from rotating, and a rotation prevention mechanism provided on the block. an annular lower surface of the Oldham ring that slides on the upper surface of the protrusion that receives the Oldham ring serving as the prevention mechanism; a plurality of oil reservoirs provided on the upper surface of the protrusion at positions where oil supply is not obstructed by the Oldham ring; A scroll compressor having a groove connecting the oil sump parts.