JPH0111986Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention consists of a compressor oil supply mechanism, more specifically, a crankshaft with an oil supply passage that passes through the center of the crankshaft and extends longitudinally from the lower end, and the crankshaft. The crankshaft has a passage extending radially outward from the center side and opening to the outer circumferential surface, and a pressure passage communicating with the lower end of the crankshaft, so that the crankshaft can be connected to a lower bearing sleeve with an open lower surface. A thrust plate for receiving the crankshaft, and a thrust holder having a communication groove for communicating the oil supply passage and the pressurization passage through the plate are laminated and fixed to the lower end of the bearing cylinder. This article relates to a powerful compressor oil supply mechanism.

(Prior Art) Conventionally, as an oil supply mechanism for a compressor equipped with a crankshaft having a plurality of eccentric shaft parts, for example,
The system described in Japanese Patent No. 11184 and shown in FIG. 5 has been proposed. The oil supply passage 10 shown in FIG. 5 is formed in the center of the crankshaft 7, extending in the axial direction and having an open lower end, and extending upward from the lower end surface of the crankshaft 7, and further in the radial direction. A pressurizing passage 11 extending outward and opening on the outer circumferential surface of the shaft 7 is formed, while the crankshaft 7
A thin thrust plate 12 and a thrust receiver 13 are fixed in a stacked manner by fixing screws 15 to the lower end opening side of the lower bearing cylinder 9 which pivotally supports the lower bearing cylinder 9 . A passage a is formed in the thrust plate 12 and the thrust receiver 13, passing through these members 12 and 13, and communicating the pressurizing passage 11 with the oil reservoir of the casing. The outlet 11c of the pressure passage 11 is connected to the oil supply passage 1.
A communication groove 13a communicating with the lower end opening side of 0 is formed.

The thrust plate 12 is used to partition the communication groove 13a provided in the thrust receiver 13 from the pressure passage 11 that opens at the lower end of the crankshaft 7.

As the crankshaft 7 rotates, the centrifugal force generated in the pressurizing passage 11 draws up the lubricating oil from the oil sump, as shown by the solid arrow, and supplies the oil to the oil supply passage 10.
Each sliding part of the crankshaft 7 was supplied with oil through the crankshaft 7.

(Problems to be Solved by the Invention) In the conventional oil supply mechanism described above, the outer diameter of the thrust plate 12 interposed between the lower end of the bearing sleeve 9 and the thrust receiver 13 is larger than the outer diameter of the thrust plate 12 that is 9 and the thrust plate 13, and the thrust plate 12 has a diameter of 0.5 mm.
Because the thickness of the thrust plate 1 is extremely thin, the thrust plate 1 is assembled after each component of the compressor is assembled.
It is difficult to confirm from the outside whether or not the thrust plate 12 has been properly assembled.For this reason, if the thrust plate 12 is forgotten to be assembled, it cannot be easily discovered, and the product may be damaged if the thrust plate 12 is forgotten to be assembled. There was a problem with assembly.

The present invention was devised in view of the above-mentioned problems, and its purpose is to make the outer diameter of the thrust plate larger than the bearing cylinder and the thrust receiver, so that when the thrust plate is assembled, the outer diameter of the thrust plate is It is an object of the present invention to provide an oil supply mechanism in which it can be immediately confirmed from the outside whether or not the thrust plate has been assembled by causing a peripheral portion to protrude outward from the bearing tube and the thrust receiver.

(Means for Solving the Problems) The oil supply mechanism of the present invention is constructed as shown in Figs. An extending oil supply passage 10 and a passage 11 extending radially outward from the center side of the crankshaft 7 and opening to the outer peripheral surface.
a, and a pressurizing passage 11 communicating with the lower surface of the crankshaft 7 is formed so that the crankshaft 7 is pivotally supported in a lower bearing sleeve 9 whose lower surface is open, and the lower bearing sleeve 9 is At the lower end, the crankshaft 7
a thrust plate 12 that receives the thrust plate 1;
2, the oil supply passage 10 and the pressurization passage 11
Thrust receiver 1 having a communication groove 13a communicating with
In the compressor oil supply mechanism, the thrust plate 12 has a large diameter portion 14 in which the outer diameter of the plate 12 is larger than the outer diameter of the lower bearing sleeve 9 and the thrust receiver 13. It was formed.

(Function) Therefore, the lower bearing tube 9 and the thrust bearing 13
When the thrust plate 12 is assembled between This made it possible to immediately confirm from the outside whether or not it was the case.

(Example) The oil supply mechanism for a compressor according to the present invention will be described below with reference to an example shown in the drawings.

FIG. 2 shows a multi-cylinder compressor, in which 1 is a main body casing, a motor 2 is arranged on the inner upper part, and a frame 3 is arranged on the inner lower part,
A plurality of cylinders 4 are formed in this frame 3, and each cylinder 4 is equipped with a piston 5, respectively.

Furthermore, bearing sleeves 8 and 9 are integrally provided at the upper and lower positions of the frame 3, and a crankshaft 7 extending in the vertical direction is supported by bearings on each of the bearing sleeves 8 and 9. While coupled to the motor 2, the crankshaft 7 is formed with eccentric shaft portions 7a at a plurality of locations corresponding to the pistons 5 of each cylinder 4, and each eccentric shaft portion 7a and each piston 5 are connected by a connecting rod. It is connected via 6.

Further, a thrust plate 12 for receiving the crankshaft 7 in the thrust direction and a thrust receiver 13 are fixed to the lower end of the lower bearing sleeve 9 in a stacked manner via fixing screws 15.

An oil supply passage 10 is formed in the center of the crankshaft 7 and extends vertically along the crankshaft 7.
The lower surface of the shaft end of the crankshaft 7 is opened, and the upper portion thereof is opened at a plurality of locations on the sliding portion of the crankshaft 7.

Further, as shown in FIG. 1, lubricating oil pumped up from the bottom oil reservoir 1a of the casing 1 is supplied to a portion of the crankshaft 7 that is displaced radially outward of the oil supply passage 10. A pressurizing passage 11 is formed that is pressurized by the centrifugal force accompanying the oil supply passage 10. It consists of a passage 11a extending radially outward from the communication passage 11b toward an outlet 11c formed on the outer peripheral surface of the bearing sleeve 9. Further, on the inner circumferential surface of the bearing tube 9, the outlet 1
An annular groove 9a is formed in the opposing portion of the thrust receiver 13, and a communication passage is formed on the upper surface side of the thrust receiver 13 to communicate the outlet 11c of the pressurizing passage 11 with the lower end of the oil supply passage 10 via the annular groove 9a. A groove 13a is formed.

Note that the thrust plate 12 has first and fourth
As shown in the figure, a first through hole 12a connecting the passage 10 and the communication groove 13a is formed at a position facing the oil supply passage 10 of the crankshaft 7 in the center thereof, and a lower end of the annular groove 9a. Two second through holes 12b are formed at positions facing the pressurizing passage 11, and a passage 13b formed in the thrust holder 13 is formed at a position facing the lower end of the pressurizing passage 11.
A third through hole 12c is formed that connects the pressurizing passage 11 to the oil reservoir 1a.

In this way, the lubricating oil that has reached the communication passage 11b from the oil reservoir 1a as the crankshaft 7 rotates is pressurized by the passage 11a extending outward in the radial direction and is supplied to the outlet 11c side. Exit 11
The oil is supplied to the oil supply passage 10 from the oil supply passage 10 through the oil supply passage 10, and is supplied to each sliding portion of the crankshaft 7 through the oil supply passage 10.

Further, a thrust plate 12 for receiving the lower end of the crankshaft 7 and a thrust receiver 13 are fixed to the lower end of the lower bearing sleeve 9 in a stacked manner via fixing screws 15.

In the compressor oil supply mechanism as described above, the thrust plate 12 is provided with the plate 1
The large diameter portion 14 is formed so that the outer diameter of the lower bearing tube 9 and the thrust receiver 13 are larger than the outer diameters of the lower bearing sleeve 9 and the thrust receiver 13.

Specifically, as is clear from FIG. 1, when the plate 12 is assembled, the thrust plate 12 has a diameter larger than the outer diameter of the lower end of the bearing tube 9 and the upper end of the thrust receiver 13. A large diameter portion 14 is formed that protrudes from the outer periphery of the bearing tube 9 and the thrust receiver 13, and this large diameter portion 14 is used to confirm whether or not the thrust plate 12 has been assembled.

(Effect of the invention) As explained above, in the compressor oil supply mechanism according to the invention, the outer diameter of the thrust plate 12 is the same as that of the lower bearing sleeve 9 and the thrust receiver 1.
Since the large diameter portion 14 is formed to be larger than the outer diameter of the bearing tube 9, when the thrust plate 12 is assembled, a part of the outer circumference of the thrust plate 12 is attached to the bearing tube 9.
The thrust plate 13 can be made to protrude outward, and it has become possible to immediately check from the outside whether or not the thrust plate 12 has been assembled.

[Brief explanation of the drawing]

Figure 1 is an enlarged vertical sectional view of the oil supply mechanism of the present invention, Figure 2
The figure is an enlarged vertical cross-sectional view of a compressor to which the oil supply mechanism is applied, FIG. 3 is a bottom view thereof, FIG. 4 is a plan view of a thrust plate, and FIG. 5 is a sectional view showing a conventional example. 7...Crankshaft, 9...Lower bearing sleeve, 10...
... Oil supply passage, 11 ... Pressure passage, 11a ... Passage, 11c ... Outlet, 12 ... Thrust plate, 13 ... Thrust receiver, 13a ... Communication groove,
14...Large diameter section.

Claims (1)

[Scope of utility model registration request] The crankshaft 7 has an oil supply passage 10 that passes through the center of the crankshaft 7 and extends longitudinally from the lower end, and a passage 11a that extends radially outward from the center of the crankshaft 7 and opens to the outer peripheral surface, A pressurizing passage 11 communicating with the lower end of the crankshaft 7 is formed so that the crankshaft 7 is pivotally supported by a lower bearing sleeve 9 whose lower surface is open. A compressor in which a thrust plate 12 for receiving the crankshaft 7 and a thrust holder 13 having a communication groove 13a that communicates the lower end of the oil supply passage 10 and the pressurization passage 11 via the plate 12 are stacked and fixed. In the oil supply mechanism of the compressor, the thrust plate 12 is formed with a large diameter portion 14 in which the outer diameter of the plate 12 is larger than the outer diameter of the lower bearing sleeve 9 and the thrust receiver 13. Refueling mechanism.