Crankshaft convenient to install

Abstract

The utility model belongs to the technical field of compressor installation, and particularly relates to a crankshaft convenient to install, which comprises rotating shafts, linkage rods are welded at the two ends of the rotating shafts, a transmission rod is welded between the rotating shafts, a third oil inlet hole is formed in the top end of the transmission rod, driving rods are welded at the two ends of the rotating shafts, and limiting rings are arranged around the driving rods. A second oil inlet hole is formed in the top end, and the two ends of the second oil inlet hole are connected with bearing bushes. The oil inlet hole is formed in the top end of the fixing block, and the oil guide pipe is arranged in the fixing block, so that lubricating oil can be directly dropped into the oil inlet hole when the crankshaft is clamped after the crankshaft is installed, the lubricating oil is conveyed to the driving rod through the oil guide pipe, and the operation that the fixing block needs to be dismantled again for lubrication is avoided; and the fixing columns are arranged at the two ends of the fixing block, so that the limiting effect is achieved, the alignment accuracy during crankshaft installation is improved, and crankshaft abrasion caused by inaccurate installation is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of compressor installation technology, specifically a crankshaft that is easy to install. Background Technology

[0002] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas; it is the heart of a refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it using a piston driven by an electric motor, and then discharges high-temperature, high-pressure refrigerant gas through the exhaust pipe, providing power for the refrigeration cycle. This process requires a crankshaft to convert the rotational motion of the electric motor into the reciprocating motion of the piston, transmitting the power to other components of the compressor.

[0003] The crankshaft is the most important component in the compressor. It bears the force transmitted from the connecting rod and converts it into torque, which is output through the crankshaft to drive other accessories on the engine. The crankshaft is subjected to the combined action of centrifugal force from the rotating mass, periodically changing gas inertial force, and reciprocating inertial force, which causes the crankshaft to be subjected to bending and torsional loads.

[0004] In existing compressors, if crankshaft rotation becomes stuck or discontinuous after installation, the bearing shells need to be removed and lubricated again, which affects the installation speed. Furthermore, existing crankshafts have problems with inaccurate alignment during installation, which accelerates crankshaft wear and affects its service life. Therefore, a crankshaft that is easier to install is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technology and address the problems of existing equipment, this utility model proposes a crankshaft that is easy to install.

[0006] The technical solution adopted by this utility model to solve its technical problem is a crankshaft that is easy to install, including a rotating shaft, connecting rods welded to both ends of the rotating shaft, a transmission rod welded between the rotating shafts, a No. 3 oil inlet hole at the top of the transmission rod, a drive rod welded to both ends of the rotating shaft, a limit ring surrounding the drive rod, a No. 2 oil inlet hole at the top of the drive rod, bearing shells connected to both ends of the No. 2 oil inlet hole, annular holes with the same diameter as the oil guide pipe at both ends of the bearing shell, a bearing shell groove inside the oil guide pipe, the top of the bearing shell groove connected to the No. 1 oil inlet hole, the No. 1 oil inlet hole being a circular through hole in the center of the bearing shell cover, limit blocks at both ends of the bearing shell cover, a circular through hole in the center of the limit block, a bolt spirally connected inside the circular through hole, a buckle between the two bearing shell covers, a support ring inside the buckle; a fixing post welded to one side of the bottom end of the bearing shell cover, and a slot opened on the other side of the bottom end of the bearing shell cover; the support ring and the drive rod fit tightly together, thereby simplifying the crankshaft installation steps.

[0007] Preferably, a connecting block is connected to the outside of the bearing cover. The connecting block has the same structure as the bearing cover and is connected to the transmission rod in a circular manner. By setting a connecting block outside the transmission rod, the stability of the crankshaft can be increased during crankshaft operation, thereby extending the service life of the crankshaft and increasing its stability.

[0008] Preferably, the connecting rods between the rotating shafts are staggered and welded; the circular through hole has a threaded through hole inside, and the diameter of the threaded through hole is the same as the diameter of the thread at the bottom of the bolt; the diameter of the slot is the same as the diameter of the fixed column; the drive rod has a through hole in its center, which is connected to the second oil inlet hole, and the diameter of the through hole is the same as that of the drive rod. This design increases the robustness of the crankshaft, thereby extending the service life of the crankshaft.

[0009] The advantages of this utility model are:

[0010] This utility model, by setting an oil inlet hole at the top of the fixing block and an oil guide pipe inside the fixing block, allows lubricating oil to be dripped directly into the oil inlet hole when crankshaft jamming occurs after installation. The lubricating oil is then delivered to the drive rod through the oil guide pipe, avoiding the need to remove the fixing block for lubrication. Furthermore, by setting fixing posts at both ends of the fixing block, a limiting function is provided, thereby increasing the accuracy of crankshaft alignment during installation and reducing crankshaft wear caused by inaccurate installation. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall crankshaft structure;

[0013] Figure 2 This is a schematic diagram of the transmission rod's position structure;

[0014] Figure 3 This is a schematic diagram of the fixed block structure;

[0015] Figure 4 This is a schematic diagram of the location and structure of the oil guide pipe;

[0016] In the diagram: 1. Rotating shaft; 2. Connecting rod; 3. Connecting block; 4. No. 1 oil inlet; 5. Buckle; 6. Bolt; 7. Limiting block; 8. Bearing cap; 9. Circular through hole; 10. No. 2 oil inlet; 11. Drive rod; 12. Bearing shell; 13. Limiting ring; 14. Hole; 15. Fixing column; 17. Support ring; 18. No. 3 oil inlet; 19. Transmission rod; 20. Threaded hole; 21. Bearing shell groove; 22. Oil guide pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0018] Please see Figure 1-4 As shown, an easy-to-install crankshaft includes a rotating shaft 1, with connecting rods 2 welded to both ends of the rotating shaft 1. A transmission rod 19 is welded between the rotating shafts 1. The transmission rod 19 has a third oil inlet hole 18 at its top end. A drive rod 11 is welded to both ends of the rotating shaft 1. A limiting ring 13 is arranged around the outside of the drive rod 11, and a second oil inlet hole 10 is opened at its top end. A bearing bush 12 is connected to both ends of the second oil inlet hole 10. An annular hole is opened at both ends of the bearing bush 12. The annular hole has the same diameter as the oil guide pipe 22. A bearing bush groove 21 is opened inside the oil guide pipe 22. The top end of the bearing bush groove 21 is connected to a first oil inlet hole 4. The first oil inlet hole 4 is a circular through hole in the center of the bearing cap 8. Limiting blocks 7 are provided at both ends of the bearing cap 8. A circular through hole 9 is opened in the center of the limiting block 7. A spiral connection is made inside the circular through hole 9. A bolt 6 is attached, and a buckle 5 is provided between the two bearing covers 8. A support ring 17 is provided inside the buckle 5. A fixing post 15 is welded to one side of the bottom end of the bearing cover 8, and a slot 14 is opened on the other side of the bottom end of the bearing cover 8. The support ring 17 and the drive rod 11 fit tightly together. When installing the crankshaft, the operator first fixes the lower half of the fixing plate 8 to the crankshaft placement position set by the compressor. Then, the rectangular hole at the top of the bearing 12 is aligned with the bearing slot 21 and the bearing 12 is inserted. Then, the shaft is placed on the top of the bearing 12. Only when the upper fixing block 8 is placed on the top of the lower fixing block 8 and the fixing post 15 is inserted into the slot 14, the circular through holes 9 of the upper and lower fixing blocks 8 are aligned. Then, the bolt 6 is screwed into the threaded hole 20 and fixed, thus completing the crankshaft installation operation.

[0019] The outer side of the bearing cover 8 is connected to a connecting block 3, the structure of which is the same as that of the bearing cover 8. The connecting block 3 is circumferentially connected to the transmission rod 19. The circular through hole 9 has a threaded through hole 20 inside, the diameter of which is the same as the diameter of the thread at the bottom of the bolt 6. The drive rod 11 has a through hole in its center, which is connected to the second oil inlet hole 10, and the diameter of which is the same as that of the drive rod 11. When the crankshaft becomes stuck or discontinuous after installation, the operator pours lubricating oil directly into the fixing block 8 through the first oil inlet hole 4. The lubricating oil then enters the oil guide pipe 22 through the first oil inlet hole 4. The operator then rotates the connecting rod 2 of the crankshaft. Driven by the connecting rod 2, the drive rod 11 begins to rotate. When the drive rod 11 comes into contact with the lubricating oil, the lubricating oil begins to wet the inside of the crankshaft, thus completing the lubrication operation inside the crankshaft.

[0020] Working principle: When installing the crankshaft, the operator first fixes the lower half of the fixing plate 8 to the crankshaft mounting position set by the compressor. Then, the rectangular hole at the top of the bearing 12 is aligned with the bearing groove 21 and the bearing 12 is inserted. Next, the crankshaft is placed on top of the bearing 12. Finally, the upper fixing block 8 is placed on top of the lower fixing block 8, and the fixing post 15 is inserted into the empty groove 14. At this point, the circular through holes 9 of the upper and lower fixing blocks 8 are aligned. Then, the bolt 6 is screwed into the threaded hole 20 and secured, thus completing the installation. The installation of the crankshaft is then completed. If the crankshaft becomes stuck or discontinuous after installation, the operator pours lubricating oil directly into the fixing block 8 through the first oil inlet hole 4. The lubricating oil then enters the oil guide pipe 22 through the first oil inlet hole 4. The operator then rotates the connecting rod 2 of the crankshaft. Driven by the connecting rod 2, the drive rod 11 begins to rotate. When the drive rod 11 comes into contact with the lubricating oil, the lubricating oil begins to wet the inside of the crankshaft through the drive rod 11, thus completing the lubrication operation inside the crankshaft.

[0021] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A crankshaft that is easy to install, characterized in that: The system includes a rotating shaft (1), with connecting rods (2) welded to both ends of the rotating shaft (1). A transmission rod (19) is welded between the rotating shafts (1). The transmission rod (19) has a No. 3 oil inlet hole (18) at its top. A drive rod (11) is welded to both ends of the rotating shaft (1). A limit ring (13) is arranged around the outside of the drive rod (11). A No. 2 oil inlet hole (10) is opened at its top. A bearing shell (12) is connected to both ends of the No. 2 oil inlet hole (10). An annular hole is opened at both ends of the bearing shell (12). The annular hole has the same diameter as the oil guide pipe (22). A bearing shell groove (21) is opened inside the oil guide pipe (22). The top of the bearing groove (21) is connected to the first oil inlet hole (4), which is a circular through hole in the center of the bearing cover (8). The bearing cover (8) has a limiting block (7) at both ends, and a circular through hole (9) is opened in the center of the limiting block (7). A bolt (6) is spirally connected inside the circular through hole (9). A buckle (5) is provided between the two bearing covers (8), and a support ring (17) is provided inside the buckle (5). A fixing column (15) is welded to one side of the bottom end of the bearing cover (8), and a slot (14) is opened on the other side of the bottom end of the bearing cover (8). The support ring (17) and the drive rod (11) fit tightly together.

2. The crankshaft for easy installation according to claim 1, characterized in that: The outer side of the tile cover (8) is connected to a connecting block (3), the structure of which is the same as that of the tile cover (8), and the connecting block (3) is connected to the transmission rod (19) in a circumferential manner.

3. The crankshaft for easy installation according to claim 1, characterized in that: The connecting rods (2) between the rotating shafts (1) are welded in an interlaced manner.

4. The crankshaft for easy installation according to claim 1, characterized in that: The circular through hole (9) has a threaded through hole (20) inside, and the diameter of the threaded through hole (20) is the same as the diameter of the thread at the bottom of the bolt (6).

5. The crankshaft for easy installation according to claim 1, characterized in that: The diameter of the slot (14) is the same as the diameter of the fixed column (15).

6. The crankshaft for easy installation according to claim 1, characterized in that: The drive rod (11) has a through hole in its center, which is connected to the second oil inlet hole (10), and the diameter of the through hole is the same as that of the drive rod (11).

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