JPH0322481Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a swing link of a scroll-type fluid machine, specifically, a swing link of a scroll type fluid machine, which is pivotally connected to a drive pin provided at an eccentric position of a drive shaft, and which rotates the power of the drive shaft. The present invention relates to a swing link for a scroll type fluid machine, which has a link body that transmits transmission to a scroll, and a guide plate is provided on the lower surface of the link body for guiding lubricating oil to an oil supply hole provided in the link body.

(Prior Art) Conventionally, this type of swing link is described in, for example, Japanese Unexamined Patent Publication No. 58-54299, and as shown in FIG. The lubricating oil sent from the oil tube 25 attached to the upper part of the drive shaft 9 by the bolt B is transferred to the cup-shaped recess 3 of the guide body 5A.
At the same time, the thrust of the revolving scroll 30 is The lubricating oil is supplied to the bearing 24 and the like.

However, in this conventional example, since the guide body 5A is attached to the main body 2 by the bolt B, the number of parts increases by the number of bolts, screw machining is also required, and the guide body 5A is attached to the body 2 by the bolt B. Since the concave portion 3A is formed into a cup shape, the configuration becomes extremely complicated, resulting in an increase in cost.

On the other hand, in order to solve this problem, as shown in FIG.
caulking part 7 to the lower end surface 26 of the main body 2 using
There is also known a device in which the guide plate 5 is caulked to the main body 2 by the caulking portion 7B provided with a protruding portion B.

(Problems to be solved by the invention) Generally, the link body 2 is manufactured by firing using a sintered alloy.
Along with this sintering, burrs are generated near the edges of each end surface of the main body 2.
Surface treatments such as deburring are applied to each end face of the wafer.

However, according to the conventional example shown in FIG. 8 described above,
Particularly when deburring the lower surface of the main body 2, since the caulked portion 7B protrudes from the lower end surface 26, in other words, the surface positions of the caulked portion 7B and the lower end surface 26 are different, so these different two Deburring must be done on both sides,
Moreover, when deburring the lower end surface 26, the caulked portion 7B becomes an obstacle, and the lower end surface 26 is deburred.
There was a problem in that it was not possible to deburr the entire surface of 6 as a single plane, and therefore the deburring process was complicated and difficult.

In addition, since the caulking portion 7B protrudes from the lower end surface 26, in other words, the caulking portion 7B protrudes from the lower end surface 26.
Since B is exposed on the lower surface of the main body 2, the lower surface of the main body 2 may come into contact with or interfere with other objects, or the main body 2 may be stacked in parts during manufacture and storage. Said caulking part 7B
There was also a problem in that the caulked portion 7B was damaged due to direct application of impact force or overload.

The purpose of the present invention is to easily deburr a swing link in which a guide plate is caulked to the link body by adding an ingenuity to the vicinity of the caulking part, and to ensure that the caulking part is not damaged. An object of the present invention is to provide a swing link for a scroll type fluid machine that can prevent the above-mentioned problems.

(Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the present invention is designed to be pivotally connected to a drive pin 12 provided at an eccentric position of the drive shaft 9, and to transfer the power of the drive shaft 9 to the revolving scroll 30. The link body 2 that transmits to the link body 2 and this link body 2
A guide plate 5 closes the open side of a recess 3 opening on the lower surface and guides lubricating oil to an oil supply hole 4 provided in the link body 2, and the guide plate 5 is caulked to the link body 2. In the swing link for a scroll-type fluid machine, a receiving step 6 for receiving the peripheral edge of the guide plate 5 is formed outside the recess 3 in the link body 2, and a caulking portion is formed on the outside of the step 6. A concave groove 8 along the step portion 6 is formed except for the groove 7.

(Function) Thus, when the link main body 2 is manufactured by firing using a sintered alloy, even if burrs are formed on the lower surface of the main body 2, the caulking portion 7 is formed on the outside of the step portion 6.
By forming the recessed groove 8 along the stepped portion 6 while leaving a portion of Since the surface positions of the two surfaces with respect to the end surface are equal, it is possible to deburr the caulked portion 7 and the lower end surface simultaneously and flush as a single plane, thereby eliminating burrs on the lower surface of the main body 2. It can be easily removed.

Further, the caulked portion 7 is located on the same plane as the lower end surface, and the outer side of the caulked portion 7 is surrounded by the lower end surface via the groove 8. The caulking portion 7 is protected from interference with other objects on the lower surface of the main body 2, and the load acting on the lower surface of the main body 2 can be shared by the lower end surface, thereby preventing damage to the caulking portion 7. can be reliably prevented.

(Embodiment) The one shown in FIG. 1 is applied to a compressor for a refrigeration system, and a compression element consisting of a fixed scroll 20 fixed to a housing 1 and a revolving scroll 30 having a boss portion 3a is arranged in a hollow cylinder. A motor (not shown) for driving the revolving scroll 30 is installed in the lower part of the casing 40.

A bearing portion 60 is formed in the housing 1,
A drive shaft 9 coupled to the motor is supported rotatably through a bearing 70 and a thrust bearing 80, and a large-diameter portion 10 constituting a counterweight 11 is integrally attached to the upper end of the drive shaft 9. A drive pin 12 is provided protrudingly on one radial side of the large diameter portion 10, that is, at an eccentric position of the drive shaft 9, and a swing The link 13 is pivotally connected.

As shown in FIG. 6, this swing link 13 has a receiving hole 14 for receiving the boss portion 3a of the revolving scroll 30 in the center of the link body 2, and the driving pin 12 is connected to the receiving hole 14 on one side in the radial direction. A fitting hole 15 to be fitted is provided, and a balance weight 16 is provided on the other radial side of the link body 2, and when the driving pin 12 is fitted into the fitting hole 15 and pivoted, the The receiving hole 14 is connected to the drive shaft 9.
The center line of this receiving hole 1
The boss portion 3a of the revolving scroll 30 is fitted to the revolving scroll 4 through a bearing 17 so as to be relatively rotatable, so that the power of the drive shaft 9 is transmitted to the revolving scroll 30.

Further, the balance weight 16 faces the counterweight 11, and the counterweight 11 has the swing link 1.
The limit pin 18 that regulates the swing angle of 3.
Further, a regulation hole 19 for receiving the limit pin 18 is formed in the balance weight 16, and by fitting the limit pin 18 into the regulation hole 19, the swing angle of the swing link 13 can be adjusted.
The angle is limited to a certain range regulated by the regulation hole 19.

Furthermore, on the open side of the recess 3 that opens on the lower surface of the link body 2, a guide plate 5 is provided on the open side of the recess 3 that closes the recess 3 and guides lubricating oil to the oil supply hole 4 provided in the link body 2. I try to swage it in place 2.

In addition, in FIG. 1, 22 is an Oldham ring for preventing the rotation of the orbiting scroll 30;
24 is a thrust bearing of the revolving scroll 30;
23 is a discharge port.

In the swing link 13 of the scroll-type fluid machine configured as described above, a receiving step 6 for receiving the peripheral edge of the guide plate 5 is formed on the outside of the recess 3 in the link body 2.
A concave groove 8 along the stepped portion 6 is formed on the outside of the step portion 6, leaving the caulked portion 7.

Specifically, it is as explained below.

As shown in FIGS. 2 and 3, the recess 3 is formed with a uniform depth on the lower surface of the link body 2, and includes a circular first recess 31 surrounding the receiving hole 14; Continuing with this and the oil supply hole 4
A tapered second recess 32 that tapers toward the receiving hole 14 is configured to improve oil supply to the bearing 17 fitted in the receiving hole 14 and oil circulation to the oil supply hole 4. .

The guide plate 5 is made of a thin plate as shown in FIG. A circular hole 5a for guiding the upper end of the cylindrical oil tube 25, which extends upward from the oil supply passage 9a of the shaft 9 and projects upward from the large diameter portion 10, is provided at a position opposite to the cylindrical oil tube 25. It is.

Then, the guide plate 5 is placed on the outer periphery of the recess 3.
A receiving step 6 is formed to receive the peripheral edge of the oil tube 25, and a gap is formed between the recess 3 and the guide plate 5 by the step 6, so that the guide plate 5 receives the oil from the oil tube 25. This allows lubricating oil to flow.

Furthermore, the step portion 6 on the lower surface of the main body 2
A concave groove 8 along the stepped portion 6 is formed on the flat surface left on the outside, leaving a caulking portion 7 for caulking the guide plate 5 to the main body 2. At this time, the surface position of the caulking portion 7 is
The surface position is the same as that of the lower end surface 26 of the main body 2 remaining outside the groove 8.

Thus, when the main body 2 is manufactured by firing using a sintered alloy, even if burrs are formed on the lower surface of the main body 2, the surface positions of the caulked portion 7 and the lower end surface 26 are equal, so that they can be easily removed. The caulked portion 7 and the lower end surface 26 can be deburred simultaneously and flush as a single plane, and the burrs on the lower surface of the main body 2 can be easily removed.

Further, as described above, the surface positions of the caulking portion 7 and the lower end surface 26 are equal, and the outer side of the caulking portion 7 is surrounded by the lower end surface 26 via the groove 8, so that the caulking portion 7 is protected by the lower end surface 26 from interference with other objects on the lower surface of the main body 2, and most of the load acting on the lower surface of the main body 2 can be shared by the lower end surface 26. This makes it possible to reliably prevent damage to the caulked portion 7.

The main body 2 and the guide plate 5 configured as described above are fixed by caulking the caulking portion 7, and constitute the swing link 13 in the scroll compressor, as shown in FIG. As shown by the solid arrow, the lubricating oil sucked up through the oil supply passage 9a of the drive shaft 9 is sent from the oil tube 25 to the guide plate 5, and is supplied to the bearing 17 around the first recess 31. At the same time, the oil is collected in the oil supply hole 4 along the taper of the second recess 32, is dispersed from the oil supply hole 4 to the outside of the main body 2, and is supplied to the Oldham link 22, the thrust bearing 24, etc. It is.

(Effect of the invention) As described above, according to the invention, a receiving step 6 for receiving the peripheral edge of the guide plate 5 is formed on the outside of the recess 3 in the link body 2, and the receiving step 6 is formed on the outside of the step 6. In addition, since the concave groove 8 is formed along the stepped portion 6 while leaving the caulked portion 7, the lower surface of the main body 2 can be easily deburred, and damage to the caulked portion 7 can be reliably prevented. .

[Brief explanation of the drawing]

Fig. 1 is a partially omitted vertical sectional view showing an embodiment of a fluid machine to which the swing link of the present invention is applied, Fig. 2 is a bottom view of the swing link, Fig. 3 is an enlarged sectional view of the main parts, and Fig. 4 is a plan view of the guide plate, FIG. 5 is a plan view of the large diameter portion of the drive shaft, FIG. 6 is a plan view of the swing link, and FIGS. 7 and 8 are drawings explaining a conventional example. . 2... Link body, 3... Recess, 4... Oil supply hole, 5...
Guide plate, 6... Reception step part, 7... Caulking part, 8... Concave groove, 30... Revolution scroll, 9... Drive shaft, 12...
Drive pin, 13...swing link.

Claims (1)

[Scope of utility model registration request] It is pivotally connected to a drive pin 12 provided at an eccentric position of the drive shaft 9, and the power of the drive shaft 9 is transferred to the revolving scroll 3.
Link body 2 that transmits to 0 and this link body 2
A guide plate 5 closes the open side of a recess 3 opening on the lower surface and guides lubricating oil to an oil supply hole 4 provided in the link body 2, and the guide plate 5 is caulked to the link body 2. This is a swing link for a scroll-type fluid machine, in which a receiving step 6 for receiving the peripheral edge of the guide plate 5 is formed on the outside of the recess 3 in the link main body 2, and on the outside of the step 6, A swing link for a scroll type fluid machine, characterized in that a concave groove 8 is formed along the stepped portion 6, leaving a caulked portion 7.