Crankshaft connecting structure

Abstract

The utility model belongs to the technical field of crankshafts, and particularly relates to a crankshaft connecting structure which comprises a connecting shaft body and a connecting assembly. The connecting assembly is arranged on the connecting shaft main body; the connecting assembly comprises an oil pipe assembled in the connecting shaft body, a positioning mechanism arranged on the oil pipe and a sealing ring connected to the positioning mechanism and arranged on the oil pipe in a sleeving mode. According to the connecting shaft, through the connecting assembly, an oil pipe can be inserted into the connecting shaft body, the fastening ring is screwed to complete connection and fixation, in the process, the positioning piece is pressed and deformed to be clamped into the positioning groove, meanwhile, the pressing ring is extruded to improve the sealing effect of the sealing ring, and connection is stable; when the fastening ring is screwed outwards, the pulling rope pulls the end of the positioning piece to enter the guide groove, the positioning piece can be conveniently separated from the positioning groove, then the oil pipe can be conveniently disassembled, and according to the scheme, good sealing performance and connecting strength can be achieved under the condition that errors exist in precision, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshafts, in particular to a crankshaft connection structure. Background Art

[0002] In the field of compressors, whether it is a reciprocating piston compressor, a rotary piston compressor or a scroll compressor, the friction of each component will generate heat during operation. At present, refrigeration oil is mainly used to lubricate and cool the components. An oil suction pipe is installed on the crankshaft stub shaft, and the oil suction pipe is inserted into the bottom of the compressor. During the rotation of the crankshaft, the refrigeration oil is sucked into the pump body through the oil suction pipe to lubricate and cool the components.

[0003] The existing oil pipe connection structure on the crankshaft generally adopts interference fit connection, but this structure has high requirements on the outer diameter of the oil suction pipe and the inner hole accuracy of the crankshaft. After a period of use, oil leakage or falling off often occurs. Therefore, we propose a crankshaft connection structure. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] A crankshaft connection structure comprises: a coupling body and a connecting component; the connecting component is arranged on the coupling body; the connecting component comprises an oil pipe assembled in the coupling body, a positioning mechanism arranged on the oil pipe, a sealing ring connected to the positioning mechanism and sleeved on the oil pipe, and a locking mechanism arranged at the end of the oil pipe; the positioning mechanism comprises a limiting groove opened on the oil pipe, a fastening ring clamped in the limiting groove, a threaded groove opened in the coupling body for connection with the fastening ring, an annular clamping groove opened in the fastening ring, a clamping block clamped in the annular clamping groove, a positioning piece fixed on the oil pipe, a guide groove opened in the oil pipe and for inserting one end of the positioning piece, a positioning groove opened in the coupling body and clamped with the positioning piece, and a traction rope connected between the clamping block and the positioning piece.

[0007] In a preferred example, the utility model can be further configured as follows: the locking mechanism includes an inclined groove opened in the coupling body, a positioning block fixed in the inclined groove, a fastening strip fixed to the inner end of the oil pipe, a locking positioning groove opened in the fastening strip and corresponding to the positioning block, and a force-bearing plate fixed on the inner side of the fastening strip.

[0008] In a preferred example, the utility model can be further configured as follows: the fastening strip is a strip-shaped spring sheet structure uniformly distributed around the end of the oil pipe.

[0009] In a preferred example, the utility model can be further configured as follows: a diamond-shaped compression ring is embedded in the sealing ring.

[0010] In a preferred example, the utility model can be further configured as follows: the positioning pieces include four groups symmetrically distributed on the oil pipe.

[0011] In a preferred example, the present invention can be further configured as follows: the guide groove is an inclined groove structure.

[0012] The above technical solution of the utility model has the following beneficial technical effects:

[0013] 1. The utility model can insert the oil pipe into the coupling body and screw the fastening ring to complete the connection and fixation through the connection component. During the process, the positioning piece is deformed by pressure and stuck in the positioning groove. At the same time, the compression ring is squeezed to improve the sealing effect of the sealing ring. The connection is relatively stable. When the oil pipe needs to be removed, the fastening ring is screwed outward and the traction rope will pull the end of the positioning piece into the guide groove, which is convenient for the positioning piece to be separated from the positioning groove, and then it is convenient to disassemble the oil pipe. This solution can have better sealing and connection strength when there is an error in accuracy, and it is highly practical.

[0014] 2. The utility model uses a locking mechanism to push the force-bearing plate when the coupling body enters and exits the oil body, thereby squeezing the fastening strip to deform outward, so that the positioning block enters the positioning groove, thereby further improving the stability of the connection between the oil pipe and the coupling body during operation and preventing the occurrence of looseness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the crankshaft connection structure of the utility model;

[0016] Figure 2 It is an enlarged view of the crankshaft connection structure A of the present invention.

[0017] Reference numerals:

[0018] 100, coupling body;

[0019] 200, connecting assembly; 210, oil pipe; 220, sealing ring; 221, pressing ring; 230, limiting groove; 240, fastening ring; 250, thread groove; 260, annular groove; 270, clamping block; 280, positioning sheet; 281, guide groove; 282, positioning groove; 290, traction rope;

[0020] 300, locking mechanism; 310, inclined groove; 320, positioning block; 330, fastening strip; 340, locking positioning groove; 350, force-bearing sheet. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] A crankshaft connection structure provided by some embodiments of the present utility model is described below in conjunction with the accompanying drawings.

[0023] Combination Figure 1-2 As shown, the utility model provides a crankshaft connection structure, comprising: a coupling body 100 and a connection assembly 200; the connection assembly 200 is arranged on the coupling body 100.

[0024] The connecting assembly 200 includes an oil pipe 210 assembled in the coupling body 100, a positioning mechanism arranged on the oil pipe 210, a sealing ring 220 connected to the positioning mechanism and sleeved on the oil pipe 210, and a locking mechanism 300 arranged at the end of the oil pipe 210; the positioning mechanism includes a limiting groove 230 opened on the oil pipe 210, a fastening ring 240 clamped in the limiting groove 230, a threaded groove 250 opened in the coupling body 100 for the fastening ring 240 to connect, an annular groove 260 opened in the fastening ring 240, a clamping block 270 clamped in the annular groove 260, a positioning piece 280 fixed on the oil pipe 210, and a guide groove 281 opened in the oil pipe 210 and for inserting one end of the positioning piece 280 , a positioning groove 282 provided on the coupling body 100 and the positioning piece 280 for clamping, and a pulling rope 290 connected between the clamping block 270 and the positioning piece 280. Through the connecting assembly 200, the oil pipe 210 can be inserted into the coupling body 100 and the fastening ring 240 can be screwed to complete the connection and fixation. During the process, the positioning piece 280 is deformed under pressure and clamped into the positioning groove 282. At the same time, the pressing ring 221 is squeezed to improve the sealing effect of the sealing ring 220. The connection is relatively stable. When the oil pipe 210 needs to be removed, the fastening ring 240 is screwed outward and the pulling rope 290 will pull the end of the positioning piece 280 into the guide groove 281, which is convenient for the positioning piece 280 to be separated from the positioning groove 282, thereby facilitating the disassembly of the oil pipe 210. This solution can have better sealing and connection strength when there is an error in accuracy.

[0025] Specifically, the sealing ring 220 is embedded with a diamond-shaped pressing ring 221, which can further squeeze the sealing ring 220 after the pressing ring 221 is squeezed, thereby providing support for the sealing ring 220 and improving the sealing performance.

[0026] Furthermore, the positioning pieces 280 include four groups symmetrically distributed on the oil pipe 210, and the guide groove 281 is an inclined groove structure. The arrangement stability of the four groups of positioning pieces 280 is relatively high, and the guide groove 281 can be used to pull the positioning pieces 280 when the fastening ring 240 moves outward, thereby causing the positioning pieces 280 to tilt and disengage from the positioning groove 282, thereby facilitating the removal of the oil pipe 210.

[0027] Among them, the locking mechanism 300 includes an inclined groove 310 opened in the coupling body 100, a positioning block 320 fixed in the inclined groove 310, a fastening strip 330 fixed to the inner end of the oil pipe 210, a positioning groove 340 opened in the fastening strip 330 and corresponding to the positioning block 320, and a force-bearing piece 350 fixed on the inner side of the fastening strip 330. Through the locking mechanism 300, when the coupling body 100 enters and exits the oil body, the force-bearing piece 350 is pushed, and then the fastening strip 330 is squeezed to deform outward, so that the positioning block 320 enters the locking positioning groove 340, thereby further improving the stability of the connection between the oil pipe 210 and the coupling body 100 during operation and preventing the occurrence of loosening.

[0028] Specifically, the fastening strip 330 is a strip-shaped spring sheet structure evenly distributed around the end of the oil pipe 210, so that it can tilt outward after being subjected to pressure, thereby allowing the positioning block 320 to be inserted into the locking positioning groove 340 for locking, thereby improving the stability of the oil pipe 210.

[0029] The working principle and use process of the utility model are as follows: first, the oil pipe 210 is inserted into the coupling body 100, and the positioning piece 280 enters the positioning groove 282 after being deformed by pressure, and then the fastening ring 240 is tightened. When the coupling body 100 enters and exits the oil body, it will push the force-bearing piece 350, and then squeeze the fastening strip 330 to deform outward, so that the positioning block 320 enters the locking positioning groove 340 for locking. When the oil pipe 210 needs to be removed, the fastening ring 240 is twisted outward while the traction rope 290 will pull the end of the positioning piece 280 into the guide groove 281, so that the positioning piece 280 can be easily separated from the positioning groove 282. After the fastening ring 240 is continuously twisted out, the oil pipe 210 can be pulled out.

[0030] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A crankshaft connection structure, characterized in that: include: A coupling body (100) and a connecting assembly (200); The connecting assembly (200) is arranged on the shaft coupling body (100); The connection assembly (200) comprises an oil pipe (210) assembled in the shaft coupling body (100), a positioning mechanism arranged on the oil pipe (210), a sealing ring (220) connected to the positioning mechanism and sleeved on the oil pipe (210), and a locking mechanism (300) arranged at the end of the oil pipe (210); The positioning mechanism comprises a limiting groove (230) formed on the oil pipe (210), a fastening ring (240) mounted in the limiting groove (230), a threaded groove (250) formed on the shaft coupling body (100) for connecting the fastening ring (240), an annular groove (260) formed in the fastening ring (240), a clamping block (270) clamped in the annular groove (260), a positioning piece (280) fixed on the oil pipe (210), a guide groove (281) formed on the oil pipe (210) and into which one end of the positioning piece (280) is inserted, a positioning groove (282) formed on the shaft coupling body (100) and clamped to the positioning piece (280), and a traction rope (290) connected between the clamping block (270) and the positioning piece (280).

2. The crankshaft connection structure according to claim 1, characterized in that: The locking mechanism (300) comprises an inclined groove (310) provided in the coupling body (100), a positioning block (320) fixed in the inclined groove (310), a fastening strip (330) fixed to the inner end of the oil pipe (210), a locking positioning groove (340) provided in the fastening strip (330) and corresponding to the positioning block (320), and a force-bearing sheet (350) fixed to the inner side of the fastening strip (330).

3. The crankshaft connection structure according to claim 2, characterized in that: The fastening strip (330) is a strip-shaped spring sheet structure evenly distributed around the end of the oil pipe (210).

4. The crankshaft connection structure according to claim 1, characterized in that: A diamond-shaped pressing ring (221) is embedded in the sealing ring (220).

5. The crankshaft connection structure according to claim 1, characterized in that: The positioning plates (280) include four groups symmetrically distributed on the oil pipe (210).

6. The crankshaft connection structure according to claim 1, characterized in that: The guide groove (281) is an inclined groove structure.

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