CN1089137C - Bearing jointing structure of sealed compressor - Google Patents

Abstract

A bearing connection structure of a hermetic compressor comprising: an integral cylinder-frame member having an orifice at its central portion, said orifice having internal threads on its inner peripheral surface; and a journal The bearing has external threads on the outer peripheral surface of the upper part of the journal bearing, and the shape of the lower part is polygonal, and this polygonal shape can be cylindrical, square or hexagonal. This bearing connection structure can allow the connecting rod connected with the crankshaft of the compressor to adopt an integral connecting rod, thereby improving the compressive and tensile strength of the connecting rod.

Description

Bearing Connection Structure of Hermetic Compressor

technical field

The present invention relates to a hermetic compressor, and more particularly to an improved bearing connection structure of the hermetic compressor, which facilitates assembly between the integral cylinder-frame member and the journal bearing dismantle.

Background technique

As shown in Figure 1, a common hermetic compressor includes: a hermetic container 1 consisting of upper and lower casings 1a, 1b; Motor assembly 3.

The lower ends of many support springs 4 are connected on the inner circumference of the lower casing 1b, and a frame 2 is supported by the upper ends thereof.

A crankshaft 5 with an eccentric portion 6 at the upper end is fitted into the rotor 3b by shrink fitting. A cylinder 7 is attached to the upper part of the frame 2 .

A piston 8 reciprocating in a cylinder 7 is connected to the eccentric portion 5 of the above-mentioned crankshaft 5 .

A valve plate 9 is mounted on one end of the above-mentioned cylinder 7 , and a cylinder head 10 is mounted on the valve plate 9 . A suction muffler (not shown) is mounted on a part of the above-mentioned cylinder head 10 .

Please refer to Fig. 2, the cylinder-bearing member that common hermetic compressor is used comprises frame 2 and journal bearing 15, all has many mutually aligned on frame 2 and journal bearing 15, the hole that accommodates screw 16, so that Connect the two together with screws 16.

Next, the configuration of the crankshaft and connecting rod using such a cylinder-bearing unit will be described.

As shown in FIG. 3 , a sleeve 12 is fixedly fitted into the inner circumference of the large end of a connecting rod 11 . The crank pin 13 is then inserted into the sleeve 12 .

Figure 4A shows a connecting rod consisting of two separable parts 11a, 11b. FIG. 4B shows another form of connecting rod, in which the two parts 12a, 12b are connected together by connecting members, such as bolts and clamps 14.

However, the cylinder-bearing member of this conventional hermetic compressor requires a tapping process to form the connection hole, and also requires many screws to fix the journal bearing 15, thereby disadvantageously increasing the number of parts and the required processing steps. .

In addition, when connecting the crankshaft and the connecting rod to such a conventional cylinder-bearing structure, there are various obvious disadvantages as follows.

First, in the sleeve type cylinder-bearing assembly shown in FIG. 2, since the sleeve 12 is used, the diameter of the crank pin 13 is made smaller, thereby weakening the crank pin 13.

In addition, in the case of detachable connecting rods as shown in Figures 3A and 3B, many high-precision machining operations are required, and many optional auxiliary parts such as bolts and clamps are also required.

Also, the connecting rod of this detachable structure may also weaken its intensity of transmitting pressure.

Contents of the invention

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a bearing connection structure for a hermetic compressor which facilitates assembly and disassembly between an integral cylinder frame member and journal bearings.

In order to achieve the above object, according to the present invention, a bearing connection structure of a hermetic compressor is provided, which structure includes: an integral cylinder-frame member having an opening in its central part, and the above-mentioned opening is inside. internal threads on the peripheral surface; and a journal bearing having external threads on the outer peripheral surface of the upper part of the journal bearing, and the shape of the lower part is cylindrical, square or hexagonal.

The bearing connection structure of the present invention does not require a tapping process for screws and screws for fixing journal bearings.

As described above, the bearing coupling structure of the hermetic compressor according to the present invention facilitates the assembly and disassembly between the cylinder-frame member with internal threads and the journal bearing with external threads, thereby improving both parts. Between the assembly process performance.

In addition, the bearing connection structure of the hermetic compressor according to the present invention can also allow the connecting rod connected to the crankshaft to be integrated, thus having the advantage of increasing the compressive and tensile strength of the connecting rod.

Brief description of the drawings

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, but the purpose of the embodiments is to illustrate the present invention, not to limit the present invention. In the attached picture:

Fig. 1 is the sectional view of existing hermetic compressor;

2 is a perspective view illustrating a connection between a frame and a journal bearing in a conventional hermetic compressor;

Fig. 3 is a perspective view of an existing connecting rod structure used in a hermetic compressor;

Fig. 4A is a plan view of a detachable connecting rod;

Figure 4B is a plan view of another detachable link;

Figure 5 is an exploded perspective view of an integral cylinder-frame member and journal bearing in accordance with the present invention;

Figure 6A is a perspective view illustrating a hexagonal journal bearing according to the present invention;

Figure 6B is a bottom view of the journal bearing shown in Figure 6A;

Figure 7A is a perspective view illustrating a square journal bearing according to the present invention; and

Figure 7B is a bottom view of the journal bearing shown in Figure 7A.

Example details

Referring to the accompanying drawings, the bearing connection structure of the hermetic compressor according to the present invention will be described below.

As shown in Figure 5, this bearing connection structure according to the hermetic compressor of the present invention comprises an integral member that is made up of cylinder part 22 and frame part 20, and a cylinder that will be connected in above-mentioned integral cylinder-frame member journal bearing 21. A port 20a passes through the central portion of the unitary cylinder-frame member. There are internal threads 20b on the inner peripheral surface of the port 20a, so that the external threads 21a formed on the upper outer peripheral surface of the journal bearing 21 can be screwed into the internal threads of the integral cylinder-frame member.

As shown in Figures 5, 6A, 6B, 7A, and 7B, the outer shape 21b of the lower part of the journal bearing 21 may be cylindrical, square, or hexagonal.

Next, the assembly steps of the bearing coupling structure having such a hermetic compressor according to the present invention will be described. First, align the journal bearing 21 with external thread 21a with the hole 20a passing through the cylinder-frame member from below, and then screw the external thread 21a on the journal bearing 21 into the hole on the cylinder-frame member Port 20a; the procedure for removing the journal bearing 21 from the cylinder-frame member is reversed.

Next, the connection process of the crankshaft (not shown in the figure), the rotor (not shown in the figure) and the connecting rod in Fig. 3 will be described.

Initially, the crankshaft (not shown) is positioned through the bore formed in the journal bearing 21 . The bottom of the crankshaft that passes is packed in the hole of rotor (not shown in the figure) with the mode of thermal compression fit again. The journal bearing 21 is then fitted into the integral cylinder-frame member from below the opening 20a.

One end of a connecting rod (not shown) is connected to an eccentric portion of a crankshaft (not shown), and the other end thereof is connected to a piston (not shown).

In detail, the journal bearing 21 is screwed into the integral cylinder-frame member when the piston (not shown) is incorporated into the cylinder 22 of the integral cylinder-frame member.

In addition to the bearing connection according to the invention described above, it is also possible to use a one-piece connecting rod.

Claims (4)

1. the bearing jointing structure of a closed compressor, it comprises:

Cylinder-the framing component that the integral body in an aperture is partly arranged in the central, there is internal thread in above-mentioned aperture on the circumferential surface within it;

And a shaft bearing, on this shaft bearing external peripheral surface at an upper portion thereof outside thread is arranged, and the profile in its underpart is a polygon.

2. bearing jointing structure as claimed in claim 1 is characterized in that, above-mentioned shaft bearing is a cylindrical shape.

3. bearing jointing structure as claimed in claim 1 is characterized in that, above-mentioned shaft bearing is square.

4. bearing jointing structure as claimed in claim 1 is characterized in that, above-mentioned shaft bearing is a hexagon.

Images