Reciprocating piston type refrigerator compressor crankshaft

Abstract

The reciprocating piston type refrigerator compressor crankshaft comprises a crank, an operation groove is formed in the right side of the crank, a threaded sleeve is fixedly connected to the inner wall of the operation groove, a threaded rod is movably connected to the interior of the threaded sleeve through threads, and an adjusting handle is fixedly connected to the upper end of the threaded rod. The surface of the threaded rod is sleeved with a limiting mounting block, and the lower end of the threaded rod is movably connected with a rotating shaft. According to the utility model, the adjusting structure is additionally arranged, the adjusting handle is rotated by the wrench to control the threaded rod to drive the limiting mounting block to move longitudinally, and then the small end of the crankshaft and the piston part are driven by the limiting mounting block to move longitudinally; the crankshaft small head is attached to the limiting moving groove, so that the stability of the crankshaft small head can be greatly improved, the efficiency of the compressor can be optimized, the energy consumption can be reduced, and the compressor can be more flexibly suitable for various working conditions.

Description

Technical Field

[0001] The utility model relates to the field of refrigerator compressors, and more specifically, to a reciprocating piston refrigerator compressor crankshaft. Background Art

[0002] The compressor is the core component of the refrigeration system, and its working efficiency directly affects the performance of the refrigeration system. When the compressor is working, the motor drives the crankshaft to rotate, and the rotating crankshaft drives the connecting rod to reciprocate. The reciprocating connecting rod pushes the piston to compress the gas. When the existing crankshaft is in operation, the radius of the connection end with the piston cannot be adjusted. In this way, when facing different refrigeration needs, the adaptability is poor, and other components may need to be replaced or adjusted more frequently. At the same time, the compressor may consume more energy, resulting in increased operating costs;

[0003] After searching, the existing patent (publication number: CN108343585B) discloses a reciprocating piston refrigerator compressor crankshaft, which is respectively provided with a crankshaft head, a balancing part and a main shaft from top to bottom; the crankshaft head is installed on the balancing part, and the main shaft is installed below the balancing part. The outer wall of the main shaft is provided with an oil inlet hole, an oil path groove, a first oil outlet hole, and an air outlet hole from top to bottom, an oil suction hole is provided at the center of the bottom of the main shaft, an oil path is provided on the main shaft, a boss is provided between the crankshaft head and the balancing part, the bottom surface of the crankshaft head is connected to the top surface of the boss, a second oil outlet hole is also provided on the top surface of the boss, and the bottom surface of the boss is connected to the top surface of the balancing part. The present invention arranges the oil outlet hole of the crankshaft on the boss on the balancing part, improves the wear resistance of the surface of the crankshaft head by means of special surface treatment, reduces the volume of the crankshaft head and reduces the weight of the crankshaft, so that the compressor using the crankshaft is smaller in volume and lighter in weight, reduces the vibration caused by inertial force, reduces the noise of the compressor and makes it run more smoothly.

[0004] When the existing crankshaft is in operation, the radius of the connecting end with the piston cannot be adjusted. In this way, when facing different refrigeration needs, the adaptability is poor, and other parts may need to be replaced or adjusted more frequently. At the same time, the compressor may consume more energy, resulting in increased operating costs. Therefore, it is necessary to open a hole groove inside the crankshaft, and then add an adjustment structure. The internal limit mounting block is controlled by turning the adjustment handle with a wrench to drive the small head of the crankshaft to rise and fall, so as to adjust the rotation radius of the piston, and the hole groove can be used to store lubricating oil for use;

[0005] Therefore, in view of the above problems, a reciprocating piston refrigerator compressor crankshaft is proposed. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a reciprocating piston refrigerator compressor crankshaft to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reciprocating piston refrigerator compressor crankshaft, comprising a crank, an operating groove is opened on the right side of the crank, a threaded sleeve is fixedly connected to the inner wall of the operating groove, a threaded rod is movably connected to the inside of the threaded sleeve through a thread, an adjustment handle is fixedly connected to the upper end of the threaded rod, a limit mounting block is sleeved on the surface of the threaded rod, a rotating shaft is movably connected to the lower end of the threaded rod, a limited movable groove is opened on the left side of the crank, and a crankshaft head is fixedly connected to the left side of the limit mounting block.

[0008] Preferably, the adjusting handle is arranged above the threaded sleeve, the limiting mounting block is fitted with the inner wall of the crank, and the threaded rod and the limiting mounting block are movably connected together through threads.

[0009] Preferably, the rotating shaft is fixedly connected to the inner bottom wall of the crank, the small head of the crankshaft passes through the limiting movement groove, and the small head of the crankshaft is in contact with the limiting movement groove.

[0010] Preferably, a sealing baffle is fixedly connected to the surface of the crankshaft head, and the sealing baffle can cover the limiting movement groove, and the sealing baffle is in contact with the crank.

[0011] Preferably, a snap-fit ​​groove opened on the surface of the crankshaft head is provided on the right side of the sealing baffle, and the snap-fit ​​groove can snap-fit ​​the piston connection part.

[0012] Preferably, an oil filling hole is opened on the right side of the crank, and an oil outlet hole is opened on the left side of the crank.

[0013] Preferably, a main shaft fixedly connected to the right side of the crank is provided on the right side of the oil filling hole, and the main shaft is made of high-strength alloy steel material.

[0014] Preferably, an oil groove is provided on the surface of the main shaft, the upper end of the oil groove is provided with a second oil filling hole provided on the surface of the main shaft, and the lower end of the oil groove is provided with a second oil outlet hole provided on the surface of the main shaft.

[0015] Technical effects and advantages of the utility model:

[0016] Compared with the prior art, the reciprocating piston refrigerator compressor crankshaft is provided with a hole groove inside the crankshaft, and then an adjustment structure is added. The adjusting handle is rotated by a wrench to control the threaded rod to drive the limit mounting block to move longitudinally, and then the limit mounting block drives the crankshaft head to move longitudinally. At the same time, since the limit mounting block fits with the hole groove inside the crankshaft, and the crankshaft head fits with the limit movement groove, the stability of the crankshaft head can also be greatly improved. This can optimize the efficiency of the compressor, reduce energy consumption, and enable the compressor to adapt to various working conditions more flexibly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 3 It is a schematic diagram of the segmented structure of the utility model.

[0020] Figure 4 It is a schematic diagram of the cross-section structure of the crank of the utility model.

[0021] The accompanying drawings are marked as follows: 1. crank; 2. operating groove; 3. threaded sleeve; 4. threaded rod; 5. adjusting handle; 6. limit mounting block; 7. limit moving groove; 8. small end of crankshaft; 9. sealing baffle; 10. engaging groove; 11. oil filling hole one; 12. oil outlet hole one; 13. rotating shaft; 14. main shaft; 15. oil filling hole two; 16. oil passage groove; 17. oil outlet hole two. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] As attached Figure 2 and Figure 3 A reciprocating piston refrigerator compressor crankshaft shown in the figure comprises a crank 1, an operating groove 2 is provided on the right side of the crank 1, a threaded sleeve 3 is fixedly connected to the inner wall of the operating groove 2, a threaded rod 4 is movably connected to the inside of the threaded sleeve 3 through a thread, an adjusting handle 5 is fixedly connected to the upper end of the threaded rod 4, a limit mounting block 6 is sleeved on the surface of the threaded rod 4, a rotating shaft 13 is movably connected to the lower end of the threaded rod 4, a limited movable groove 7 is provided on the left side of the crank 1, and a crankshaft head 8 is fixedly connected to the left side of the limit mounting block 6.

[0025] Among them: the wrench is inserted into the interior of the operating groove 2, and then engaged with the surface of the adjusting handle 5. Rotating the adjusting handle 5 can drive the threaded rod 4 to rotate inside the threaded sleeve 3. Since the limit mounting block 6 is in contact with the inner wall of the crank 1, the limit mounting block 6 can be limited at this time. Then the threaded rod 4 will drive the limit mounting block 6 to move longitudinally, and the limit mounting block 6 will drive the crankshaft head 8 to move longitudinally, so as to adjust the rotation radius of the piston connected to the crankshaft head 8. During the process, the limit moving groove 7 can limit the crankshaft head 8, making the crankshaft head 8 more stable.

[0026] Embodiment 2

[0027] Based on the first embodiment, the solution in the first embodiment is further detailed in combination with the following specific working methods. Figures 1 to 4 As shown, see the following description for details:

[0028] As a preferred embodiment, the adjusting handle 5 is arranged above the threaded sleeve 3, the limit mounting block 6 is in contact with the inner wall of the crank 1, and the threaded rod 4 is movably connected to the limit mounting block 6 through a threaded connection; further, the limit mounting block 6 can be limited inside the crank 1, so when the threaded rod 4 rotates, the threaded rod 4 will drive the limit mounting block 6 to move stably longitudinally.

[0029] As a preferred embodiment, the rotating shaft 13 is fixedly connected to the inner bottom wall of the crank 1, the crankshaft head 8 passes through the limiting movable groove 7, and the crankshaft head 8 is in contact with the limiting movable groove 7; further, the limiting movable groove 7 will limit the crankshaft head 8 and make the crankshaft head 8 more stable.

[0030] As a preferred embodiment, a sealing baffle 9 is fixedly connected to the surface of the crankshaft head 8, and the sealing baffle 9 can cover the limiting movable groove 7, and the sealing baffle 9 fits the crank 1; further, the limiting movable groove 7 is covered by the sealing baffle 9, so as to seal the crank 1 to prevent the lubricating oil set inside the crank 1 from leaking from this part.

[0031] As a preferred embodiment, a snap-fit ​​groove 10 is provided on the surface of the crankshaft head 8 on the right side of the sealing baffle 9, and the snap-fit ​​groove 10 can snap-fit ​​the piston connection part; further, the piston part is snap-fitted and connected through the snap-fit ​​groove 10, so that the connection between the two can be more stable to prevent the piston from shaking laterally.

[0032] As a preferred embodiment, an oil filling hole 11 is opened on the right side of the crank 1, and an oil outlet hole 12 is opened on the left side of the crank 1; further, lubricating oil is added to the interior of the crank 1 through the oil filling hole 11, and then discharged through the oil outlet hole 12 for use.

[0033] As a preferred embodiment, a main shaft 14 fixedly connected to the right side of the crank 1 is provided on the right side of the oil filling hole 11, and the main shaft 14 is made of high-strength alloy steel material. Furthermore, the main shaft 14 is used to connect to the motor end, and the main shaft 14 is driven to rotate by the operation of the motor.

[0034] As a preferred embodiment, an oil groove 16 is provided on the surface of the main shaft 14, an upper end of the oil groove 16 is provided with an oil filling hole 15 provided on the surface of the main shaft 14, and a lower end of the oil groove 16 is provided with an oil outlet hole 17 provided on the surface of the main shaft 14; further, lubricating oil is added through the oil filling hole 15, and then the lubricating oil moves through the oil groove 16 to the position of the oil outlet hole 17, and then the position is discharged for use.

[0035] The working process of the utility model is as follows:

[0036] When installing the crankshaft of the refrigerator compressor, the wrench can be inserted into the interior of the operating groove 2 and then engaged with the surface of the adjusting handle 5. Turning the adjusting handle 5 can drive the threaded rod 4 to rotate inside the threaded sleeve 3. Since the limit mounting block 6 is in contact with the inner wall of the crank 1, the limit mounting block 6 can be limited at this time. Then the threaded rod 4 will drive the limit mounting block 6 to move longitudinally, and the limit mounting block 6 will drive the crankshaft head 8 to move longitudinally. After the position of the crankshaft head 8 is adjusted, the piston part is engaged and connected through the position of the engaging groove 10, and then respectively through Lubricating oil is added to the oil filling hole 11 and the oil filling hole 2 15. After the installation work is completed, the motor is started to drive the main shaft 14 to rotate, and then the main shaft 14 drives the crank 1 and the crankshaft head 8 to rotate, and finally the crankshaft head 8 drives the piston to reciprocate. The device changes the stroke of the piston by adjusting the rotation radius of the crankshaft head 8, thereby changing the compression ratio. In this way, the compressor can optimize its performance under different working conditions and improve energy efficiency. In some cases, adjusting the rotation radius can reduce mechanical stress and wear, thereby extending the service life of the compressor.

[0037] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A reciprocating piston refrigerator compressor crankshaft, comprising a crank (1), characterized in that: An operating groove (2) is provided on the right side of the crank (1), a threaded sleeve (3) is fixedly connected to the inner wall of the operating groove (2), a threaded rod (4) is movably connected to the inside of the threaded sleeve (3) through a thread, an adjusting handle (5) is fixedly connected to the upper end of the threaded rod (4), a limit mounting block (6) is sleeved on the surface of the threaded rod (4), a rotating shaft (13) is movably connected to the lower end of the threaded rod (4), a limit moving groove (7) is provided on the left side of the crank (1), and a crankshaft head (8) is fixedly connected to the left side of the limit mounting block (6).

2. A reciprocating piston refrigerator compressor crankshaft according to claim 1, characterized in that: The adjusting handle (5) is arranged above the threaded sleeve (3), the limiting mounting block (6) is in contact with the inner wall of the crank (1), and the threaded rod (4) and the limiting mounting block (6) are movably connected together via threads.

3. The reciprocating piston refrigerator compressor crankshaft according to claim 1, characterized in that: The rotating shaft (13) is fixedly connected to the inner bottom wall of the crank (1); the crankshaft head (8) passes through the limiting movement groove (7), and the crankshaft head (8) fits the limiting movement groove (7).

4. A reciprocating piston refrigerator compressor crankshaft according to claim 1, characterized in that: A sealing baffle (9) is fixedly connected to the surface of the crankshaft head (8), and the sealing baffle (9) can cover the limit movement groove (7), and the sealing baffle (9) is in close contact with the crank (1).

5. A reciprocating piston refrigerator compressor crankshaft according to claim 4, characterized in that: The right side of the sealing baffle (9) is provided with a snap-fit ​​groove (10) opened on the surface of the crankshaft head (8), and the snap-fit ​​groove (10) can snap-fit ​​the piston connection part.

6. A reciprocating piston refrigerator compressor crankshaft according to claim 1, characterized in that: An oil filling hole (11) is provided on the right side of the crank (1), and an oil outlet hole (12) is provided on the left side of the crank (1).

7. A reciprocating piston refrigerator compressor crankshaft according to claim 6, characterized in that: A main shaft (14) fixedly connected to the right side of the crank (1) is arranged on the right side of the oil filling hole 1 (11), and the main shaft (14) is made of high-strength alloy steel material.

8. The reciprocating piston refrigerator compressor crankshaft according to claim 7, characterized in that: An oil passage groove (16) is provided on the surface of the main shaft (14), the upper end of the oil passage groove (16) is provided with a second oil filling hole (15) provided on the surface of the main shaft (14), and the lower end of the oil passage groove (16) is provided with a second oil outlet hole (17) provided on the surface of the main shaft (14).

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