CN201310457Y - Connecting structure of piston and connecting rod of sealed type reciprocating compressor - Google Patents

Abstract

The utility model discloses a connection structure between a piston and a connecting rod of an airtight reciprocating compressor, which comprises a connecting rod and a piston. A ball head, the spherical bearing seat at the end of the connecting rod is pivotally connected with the ball head in the inner cavity of the piston. Adopting the technical scheme of the connection structure between the piston and the connecting rod of the hermetic reciprocating compressor of the utility model not only ensures the free operation after the connection between the piston and the connecting rod, but also increases the amount of lubricating oil entering the ball head, satisfying the The spherical bearing seat and the ball head on the piston need to be lubricated to avoid abnormal wear of the two, improve the operation reliability of the compressor, reduce the loss of mechanical friction, and improve the energy efficiency ratio of the compressor.

Description

Connection structure of piston and connecting rod of hermetic reciprocating compressor

technical field

The utility model relates to a connection structure of a piston and a connecting rod of a sealed reciprocating compressor.

Background technique

Common hermetic reciprocating compressor (see accompanying drawing 1) comprises an airtight container 5, motor 6, a compression mechanism 7, a frame 8, a crankshaft 9 and a connecting rod 4, wherein, motor 6 and a compression mechanism 7 is arranged inside the airtight container 5, and the motor 6 includes a stator and a rotor; the compression mechanism 7 includes a cylinder 70 and a piston 2, and the piston 2 can slide freely along the inner wall of the cylinder; the frame 8 supports the motor 6 and the compression mechanism 7 in the airtight container 5; The crankshaft 9 transmits the rotational force of the motor 6, its lower part is fixed at the center of the rotor of the motor 6, and its upper part has an eccentric part 90, which rotates with the rotor and its upper part of the eccentric part 90 is supported on the frame 8; the connecting rods 4 are respectively It is pivotally connected with the eccentric part 90 of the crankshaft 9 and is movably connected with the piston 2 ;

The connecting structure of the piston and the connecting rod of the hermetic reciprocating compressor in the prior art (see accompanying drawings 2 to 4) is: the end of the connecting rod 4 is fixedly connected with a ball head 3, and the ball head 3 and the piston 2 The connection method is that the ball head 3 is rotatably riveted on the wall surface of the inner cavity of the piston 2, and when riveting, corrugations 1 are provided at the riveting place as a supply path for lubricating oil. However, the oil supply passage of this connection is very small, and usually the ball head 3 cannot obtain the desired amount of lubricating oil, thus causing abnormal wear between the ball head 3 and the piston 2 .

Contents of the invention

The purpose of this utility model is to overcome the deficiencies of the prior art and provide a connection structure between the piston and the connecting rod of a hermetic reciprocating compressor, which not only ensures the free operation of the connection between the piston and the connecting rod, but also improves the The amount of lubricating oil in the head.

A technical solution to achieve the above object is: a connection structure between the piston and the connecting rod of a hermetic reciprocating compressor, including the connecting rod and the piston, the end of the connecting rod is provided with a spherical bearing seat, and the inner part of the piston A ball head is fixedly arranged in the middle of the cavity, and the spherical bearing seat at the end of the connecting rod is pivotally connected with the ball head in the inner cavity of the piston.

In the connection structure between the piston and the connecting rod of the hermetic reciprocating compressor mentioned above, the spherical bearing seat is provided with several openings.

Adopting the technical scheme of the connection structure between the piston and the connecting rod of the hermetic reciprocating compressor of the utility model not only ensures the free operation after the connection between the piston and the connecting rod, but also increases the amount of lubricating oil entering the ball head, satisfying the The spherical bearing seat and the ball head on the piston need to be lubricated to avoid abnormal wear of the two, improve the operation reliability of the compressor, reduce the loss of mechanical friction, and improve the energy efficiency ratio of the compressor.

Description of drawings

Fig. 1 is a structural schematic diagram of a hermetic reciprocating compressor;

Fig. 2 is a schematic diagram of the connecting structure of the piston and the connecting rod of the hermetic reciprocating compressor of the prior art;

Fig. 3 is A-A to sectional view among Fig. 2;

Fig. 4 is the B-B direction sectional view among Fig. 3;

Fig. 5 is a schematic diagram of the connection structure between the piston and the connecting rod of the hermetic reciprocating compressor of the present invention;

Fig. 6 is a C-C cross-sectional view in Fig. 5;

Fig. 7 is a sectional view taken along line D-D in Fig. 5 .

Detailed ways

In order to better understand the technical solution of the present utility model, it will be described in detail below through specific embodiments in conjunction with the accompanying drawings:

Please refer to Fig. 5 to Fig. 7, the connection structure between the piston and the connecting rod of the hermetic reciprocating compressor of the present invention includes the connecting rod 4 and the piston 2, wherein,

A spherical bearing seat 1 is provided at the end of the connecting rod, and two openings 10 are symmetrically arranged on the spherical bearing seat 1, so that the external lubricating oil can easily enter the ball head 3 through the openings 10, and the ball head 3 to lubricate;

A ball head 3 is fixed in the middle of the inner cavity of the piston 2;

The connection mode between the connecting rod 4 and the piston 2 is that the spherical bearing seat 1 at the end of the connecting rod is pivotally connected with the ball head 3 in the inner cavity of the piston.

The connection structure between the piston and the connecting rod of the hermetic reciprocating compressor of the utility model not only ensures the free operation of the piston 2 and the connecting rod 4 after being connected, but also increases the amount of lubricating oil entering the ball head 3, which satisfies the requirements of the spherical bearing. Lubrication of the seat 1 and the ball head 3 on the piston is required to avoid abnormal wear of the two, improve the operation reliability of the compressor, reduce the loss of mechanical friction, and improve the energy efficiency ratio of the compressor.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above-mentioned The changes and modifications of the embodiments will all fall within the scope of the claims of the present utility model.

Claims (2)

1. A connection structure between a piston and a connecting rod of a hermetic reciprocating compressor, comprising a connecting rod and a piston, characterized in that, the end of the connecting rod is provided with a spherical bearing seat, and the inner cavity middle part of the piston is fixedly arranged There is a ball head, and the spherical bearing seat at the end of the connecting rod is pivotally connected with the ball head in the inner cavity of the piston. 2. The connection structure between the piston and the connecting rod of the hermetic reciprocating compressor according to claim 1, wherein the spherical bearing seat is provided with several openings.

Images