Noise reduction device for detecting automobile air conditioner compressor

Abstract

The utility model discloses a be used to automobile air conditioner compressor detection uses noise reduction device, including work table still including intermittent rotation subassembly of setting on work table, the detection platform of setting in work table top, the noise reduction cover of setting in the detection platform top, the sound insulation felt of fixed connection in the noise reduction cover bottom, set up in the mounting bolt of noise reduction cover inside, the observation window of opening in noise reduction cover. Two groups of noise reduction cover are installed in the detection platform top through mounting bolt symmetry, cooperate sound insulation felt and enhance the installation stability of noise reduction cover, can effectively promote the basic noise reduction ability of compressor body, through placing compressor body in noise reduction cover inside, utilize fixed assembly and fix it and with rubber pad extrusion, has improved the installation stability of compressor body, and further enhances the noise reduction effect with the help of the buffering effect of rubber pad, through the sound insulation cotton of noise reduction cover inner wall, can absorb noise efficiently when compressor body works, reduce the interference to the detection personnel, improve detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction device technology, specifically a noise reduction device for testing automotive air conditioning compressors. Background Technology

[0002] The automotive air conditioning compressor is the core power component of the automotive air conditioning system. Its main function is to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant through the engine or motor, thereby promoting the circulation of the refrigerant within the air conditioning system and achieving heat transfer. Automotive air conditioning compressor testing refers to the process of comprehensively evaluating and verifying the performance, quality, operating status, and potential faults of the automotive air conditioning compressor through a series of professional technical means and equipment. Its purpose is to ensure that the compressor meets design standards, can work normally, and meets the cooling needs of the automotive air conditioning system.

[0003] In existing technologies, when testing a compressor, once the compressor starts running, it generates continuous noise that is often quite loud. This noise not only causes significant auditory interference to the testing personnel, but also, if they are in such an environment for a long time, it may affect their concentration and judgment, leading to increased errors in reading test data and decreased sensitivity to identifying abnormal operating conditions, thus indirectly reducing the accuracy of the test. However, sound insulation devices need to be installed before the compressor is installed, resulting in low installation efficiency, a large number of repetitive mechanical operations, and high labor and time costs, which greatly reduces the overall efficiency of the compressor test and affects the continuity and stability of the test work. Utility Model Content

[0004] The purpose of this invention is to provide a noise reduction device for testing automotive air conditioning compressors, in order to solve the problems mentioned in the background art, where the high decibel noise generated after the compressor is started during testing interferes with the testing personnel, affects their attention and judgment, and leads to a decrease in testing accuracy. Furthermore, the installation of a sound insulation device before the compressor is installed results in low installation efficiency and also affects the continuity and stability of the testing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a noise reduction device for testing automotive air conditioning compressors, comprising a workbench, an intermittent rotation component mounted on the workbench, a testing platform mounted on top of the workbench, a noise reduction cover mounted on top of the testing platform, sound insulation felt fixedly connected to the bottom of the noise reduction cover, mounting bolts mounted inside the noise reduction cover, an observation window on the noise reduction cover, sound insulation cotton fixedly connected to the inner wall of the noise reduction cover, a rubber pad fixedly connected inside the noise reduction cover, a compressor body mounted inside the noise reduction cover, and a fixing component mounted at the bottom of the testing platform. The mounting bolts are threadedly connected to the inside of the testing platform, the compressor body is mounted on top of the rubber pad, and the fixing component fixes the compressor body inside the noise reduction cover. The intermittent rotation component drives the testing platform to rotate.

[0006] Based on the preferred embodiment of this technical solution, the sound insulation cotton has a corresponding through groove at the corresponding position of the observation window.

[0007] Based on the preferred embodiment of this technical solution, two sets of noise reduction covers are provided, and the two sets of noise reduction covers are symmetrically distributed on the top of the testing platform.

[0008] According to the preferred embodiment of this technical solution, the intermittent rotation assembly includes a long rod rotatably connected inside the worktable, a second transmission roller fixedly connected to the long rod, a first motor fixedly connected inside the worktable, a first transmission roller fixedly connected to the output end of the first motor, a transmission belt connecting the first transmission roller and the second transmission roller, a disc fixedly connected to the long rod, a rotating shaft rotatably connected inside the worktable, an intermittent rotating disk fixedly connected to the rotating shaft, and a smooth rod fixedly connected to the top of the disc. The long rod is fixedly connected to the top of the rotating shaft, and the smooth rod is located inside the intermittent rotating disk. The first motor drives the long rod to rotate, and the rotating long rod drives the detection table to rotate intermittently.

[0009] Based on the preferred embodiment of this technical solution, the intermittent rotating disk has a corresponding through groove at the corresponding position of the optical rod, and there are four sets of through grooves. The four sets of through grooves are symmetrically distributed on the intermittent rotating disk, and the optical rod is set inside the through groove of the intermittent rotating disk.

[0010] According to the preferred embodiment of this technical solution, the fixing component includes a mounting plate fixedly connected to the bottom of the testing platform, a fixing frame fixedly connected to the bottom of the mounting plate, a first semicircular block fixedly connected to the bottom of the mounting plate, a long shaft rotatably connected inside the first semicircular block, a wire roller fixedly connected to the long shaft, a binding rope wound on the wire roller, a worm gear fixedly connected to the long shaft, a second semicircular block fixedly connected to the bottom of the mounting plate, a second motor fixedly connected to the bottom of the mounting plate, and a worm gear fixedly connected to the output end of the second motor. The end of the binding rope away from the wire roller is bound to the fixing frame. The binding rope is located inside the mounting plate, the testing platform, the noise reduction cover, and the rubber pad. The worm gear is rotatably connected inside the second semicircular block, and the worm wheel meshes with the outside of the worm gear.

[0011] Based on the preferred embodiment of this technical solution, two sets of binding ropes are provided, and the two sets of binding ropes are symmetrically distributed on the long axis.

[0012] Based on the preferred embodiment of this technical solution, the mounting plate, testing platform, noise reduction cover, and rubber pad all have corresponding through holes at the corresponding positions of the binding rope, and the binding rope is sequentially arranged inside the through holes of the mounting plate, testing platform, noise reduction cover, and rubber pad.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Two sets of noise reduction covers are symmetrically installed on the top of the testing platform using mounting bolts. Combined with sound insulation felt, this enhances the installation stability of the noise reduction covers and effectively improves the basic noise reduction capability of the compressor body. By placing the compressor body inside the noise reduction cover and fixing it with fixing components and pressing it against the rubber pad, the installation stability of the compressor body is improved, and the cushioning effect of the rubber pad further enhances the noise reduction effect. The sound insulation cotton on the inner wall of the noise reduction cover efficiently absorbs noise when the compressor body is working, reducing interference with testing personnel and improving testing accuracy.

[0015] 2. The second motor drives the worm gear to rotate, which in turn drives the meshing worm wheel and the long shaft to rotate. The roller on the long shaft rotates accordingly and tightens the binding rope. One end of the binding rope passes through the mounting plate, the test platform, the noise reduction cover and the rubber pad, and is tied to the fixed frame, which firmly fixes the compressor body to the rubber pad. This effectively prevents the compressor from shifting due to vibration during the test and improves reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the noise reduction device for testing automotive air conditioning compressors according to this utility model;

[0017] Figure 2 This is a schematic diagram of the noise reduction cover structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the compressor body structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the intermittent rotation component structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the fixing component structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the worm gear and worm shaft structure of this utility model.

[0022] In the diagram: 1. Workbench; 21. Testing table; 22. Noise reduction cover; 23. Sound insulation felt; 24. Mounting bolt; 25. Observation window; 26. Sound insulation cotton; 27. Rubber pad; 28. Compressor body; 31. Long rod; 32. Disc; 33. Smooth rod; 34. Rotating shaft; 35. Intermittent rotating disc; 36. First motor; 37. First transmission roller; 38. Second transmission roller; 39. Transmission belt; 41. Mounting plate; 42. Fixing frame; 43. First semicircular block; 44. Long shaft; 45. Wire roller; 46. Binding rope; 47. Worm gear; 48. Second motor; 49. Worm; 410. Second semicircular block. Detailed Implementation

[0023] 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 protection scope of the present utility model.

[0024] Please see Figure 1-6This utility model provides an embodiment of a noise reduction device for testing automotive air conditioning compressors, comprising a workbench 1, an intermittent rotation assembly mounted on the workbench 1, a testing platform 21 mounted on top of the workbench 1, a noise reduction cover 22 mounted on top of the testing platform 21, a sound insulation felt 23 fixedly connected to the bottom of the noise reduction cover 22, mounting bolts 24 inside the noise reduction cover 22, an observation window 25 on the noise reduction cover 22, sound insulation cotton 26 fixedly connected to the inner wall of the noise reduction cover 22, a rubber pad 27 fixedly connected to the inside of the noise reduction cover 22, a compressor body 28 inside the noise reduction cover 22, and a fixing assembly mounted at the bottom of the testing platform 21. The mounting bolts 24 are threadedly connected to the inside of the testing platform 21, and the compressor body 28 is mounted on top of the rubber pad 27. The fixing assembly fixes the compressor body 28 inside the noise reduction cover 22. The intermittent rotation assembly drives the testing platform 21 to rotate, and the mounting bolts 24 symmetrically mount two sets of noise reduction covers 22 on top of the testing platform 21 to cooperate with sound insulation. The felt 23 enhances the installation stability of the noise reduction cover 22, effectively improving the basic noise reduction capability of the compressor body 28. By placing the compressor body 28 inside the noise reduction cover 22 and fixing it with the fixing components and pressing it against the rubber pad 27, the installation stability of the compressor body 28 is improved, and the noise reduction effect is further enhanced by the buffering effect of the rubber pad 27. The sound insulation cotton 26 on the inner wall of the noise reduction cover 22 can efficiently absorb noise when the compressor body 28 is working, reducing interference to the testing personnel and improving the testing accuracy. The fixing components drive the worm gear 49 to rotate through the second motor 48. The worm gear 49 drives the meshing worm wheel 47 and the long shaft 44 to rotate. The wire roller 45 on the long shaft 44 rotates accordingly and tightens the binding rope 46. One end of the binding rope 46 passes through the mounting plate 41, the testing table 21, the noise reduction cover 22 and the rubber pad 27 and is tied to the fixing frame 42, firmly fixing the compressor body 28 to the rubber pad 27. This effectively prevents the compressor from shifting due to vibration during the testing process and improves reliability.

[0025] Please see Figure 2 A further solution based on this embodiment is as follows: the sound insulation cotton 26 has a matching through groove at the corresponding position of the observation window 25. By opening a matching through groove on the sound insulation cotton 26 at the corresponding position of the observation window 25, the observation window 25 will not be blocked by the sound insulation cotton 26, ensuring that the testing personnel can clearly observe the operating status of the compressor body 28 through the observation window 25. At the same time, the sound insulation cotton 26 can fully play its sound absorption and noise reduction role in other areas, avoiding mutual interference between the observation function and the noise reduction function, and improving the practicality of the device.

[0026] Please see Figure 2A further solution based on this embodiment is as follows: two sets of noise reduction covers 22 are provided, and the two sets of noise reduction covers 22 are symmetrically distributed on the top of the testing platform 21. By setting two sets of symmetrically distributed noise reduction covers 22, two compressor bodies 28 can be installed and prepared at the same time. When the compressor in one set of noise reduction covers 22 is in the testing state, the other set can be used to install the compressor to be tested or disassemble the tested compressor. The intermittent rotation component drives the testing platform 21 to rotate to achieve rapid switching, which greatly reduces the waiting and loading / unloading time when testing a single unit and significantly improves the work efficiency of batch testing.

[0027] Please see Figure 4 A further solution based on this embodiment is as follows: the intermittent rotation assembly includes a long rod 31 rotatably connected inside the worktable 1, a second transmission roller 38 fixedly connected to the long rod 31, a first motor 36 fixedly connected inside the worktable 1, a first transmission roller 37 fixedly connected to the output end of the first motor 36, a transmission belt 39 drivingly connected between the first transmission roller 37 and the second transmission roller 38, a disc 32 fixedly connected to the long rod 31, a rotation shaft 34 rotatably connected inside the worktable 1, an intermittent rotating disk 35 fixedly connected to the rotation shaft 34, and a smooth rod 33 fixedly connected to the top of the disc 32. The long rod 31 is fixedly connected to the top of the rotation shaft 34, and the smooth rod 33 is disposed inside the intermittent rotating disk 35. The first motor 36 drives the long rod 31 to rotate, which in turn drives the testing table 21 to rotate intermittently. Powered by the first motor 36, the long rod 31 rotates through the transmission action of the first transmission roller 37, the transmission belt 39, and the second transmission roller 38. The long rod 31 drives the disc 32 and the smooth rod 33 to rotate. When the smooth rod 33 moves within the through groove of the intermittent rotating disc 35, it drives the testing table 21 to rotate intermittently by 90 degrees. By rotating it 180 degrees, the positions of the two noise reduction covers 22 relative to the testing personnel can be adjusted, making the rotation rhythm of the testing table 21 controllable and allowing it to accurately stop at the testing station. This ensures accurate positioning each time the compressor is switched, facilitates docking with testing equipment, and improves the stability of the testing process.

[0028] Please see Figure 4A further solution based on this embodiment is as follows: the intermittent rotating disk 35 has a matching through groove at the corresponding position of the optical rod 33, and there are four sets of through grooves. The four sets of through grooves are symmetrically distributed on the intermittent rotating disk 35. The optical rod 33 is set inside the through groove of the intermittent rotating disk 35. By setting four sets of symmetrically distributed through grooves on the intermittent rotating disk 35, in conjunction with the rotation of the optical rod 33, when the optical rod 33 enters the through groove, it can drive the intermittent rotating disk 35 to rotate 90 degrees. When it leaves the through groove, it causes the intermittent rotating disk 35 to stop rotating. The design of four sets of through grooves allows the detection table 21 to achieve four precise intermittent pauses. By using two sets of through grooves, the detection table 21 can rotate 180 degrees, making the rotation angle uniform and stable, ensuring the consistency of the position of the detection table 21 after each rotation, and improving the accuracy of the device operation.

[0029] Please see Figure 5-6 A further embodiment of this solution is as follows: the fixing assembly includes a mounting plate 41 fixedly connected to the bottom of the detection table 21, a fixing frame 42 fixedly connected to the bottom of the mounting plate 41, a first semicircular block 43 fixedly connected to the bottom of the mounting plate 41, a long shaft 44 rotatably connected inside the first semicircular block 43, a wire roller 45 fixedly connected to the long shaft 44, a binding rope 46 wound on the wire roller 45, a worm gear 47 fixedly connected to the long shaft 44, a second semicircular block 410 fixedly connected to the bottom of the mounting plate 41, a second motor 48 fixedly connected to the bottom of the mounting plate 41, and a worm gear 49 fixedly connected to the output end of the second motor 48. The end of the binding rope 46 away from the wire roller 45 is bound to the fixing frame. On the 42, the binding rope 46 is set inside the mounting plate 41, the test table 21, the noise reduction cover 22, and the rubber pad 27. The worm gear 49 is rotatably connected inside the second semicircular block 410, and the worm wheel 47 is engaged with the outside of the worm gear 49. The second motor 48 drives the worm gear 49 to rotate, which drives the meshing worm wheel 47 and the long shaft 44 to rotate. The wire roller 45 on the long shaft 44 rotates accordingly and tightens the binding rope 46. One end of the binding rope 46 passes through the mounting plate 41, the test table 21, the noise reduction cover 22, and the rubber pad 27 and is tied to the fixing frame 42, which firmly fixes the compressor body 28 to the rubber pad 27. This can effectively prevent the compressor from shifting due to vibration during the test and improve reliability.

[0030] Please see Figure 6 A further solution based on this embodiment is as follows: two sets of binding ropes 46 are provided, and the two sets of binding ropes 46 are symmetrically distributed on the long axis 44. By setting two sets of symmetrically distributed binding ropes 46, the compressor body 28 is fixed from both sides at the same time, so that the constraint force on the compressor body 28 is more balanced, avoiding tilting or loosening that may be caused by fixing on one side, and enhancing the stability of the fixation. At the same time, the two sets of binding ropes 46 work together to better adapt to the fixation requirements of compressors of different sizes and improve versatility.

[0031] Please see Figure 3 A further solution based on this embodiment is as follows: the mounting plate 41, the testing platform 21, the noise reduction cover 22, and the rubber pad 27 all have corresponding through holes at the corresponding positions of the binding rope 46. The binding rope 46 is sequentially arranged inside the through holes of the mounting plate 41, the testing platform 21, the noise reduction cover 22, and the rubber pad 27. By opening through holes at the corresponding positions of the mounting plate 41, the testing platform 21, the noise reduction cover 22, and the rubber pad 27, the binding rope 46 can pass through each component in an orderly manner, avoiding the binding rope 46 from being exposed and getting tangled or interfering with other components, ensuring the stability of the binding at the other end of the binding rope 46. At the same time, the through holes guide the binding rope 46, so that the tension of the binding rope 46 can be accurately applied to the compressor body 28, improving the fixing effect and making the internal structure of the device more neat and orderly.

[0032] In another embodiment of the intermittent rotation component, other structures in the prior art can also be used, such as sprockets and chains. Sprockets can replace the first transmission roller 37 and the second transmission roller 38, and chains can replace the transmission belt 39. The advantages are higher transmission efficiency and more stable power transmission, the ability to withstand larger loads, less wear and longer service life, and less susceptibility to slippage during long-term high-frequency intermittent rotation, thus ensuring the accuracy of the intermittent rotation of the testing table.

[0033] In another embodiment based on the fixing component, other structures in the prior art can also be used, such as bolts, to replace the fixing bracket 42. The advantage is that by opening corresponding threaded holes, the bolts are threaded into the corresponding threaded holes, and the binding rope 46 is tied to the bolts, which facilitates fine-tuning of the fixing of the binding rope 46 to the compressor body 28 and improves practicality.

[0034] Working principle: Two sets of symmetrically distributed noise reduction covers 22 are fixed to the top of the testing platform 21 by mounting bolts 24. The sound insulation felt 23 at the bottom of the noise reduction cover 22 enhances the installation seal, while the sound insulation cotton 26 on the inner wall absorbs the noise generated by the compressor body 28 during operation. At the same time, the through groove on the sound insulation cotton 26 corresponding to the observation window 25 ensures that the testing personnel can clearly observe the internal situation through the observation window 25. Then, the compressor body 28 is placed on top of the rubber pad 27 inside the noise reduction cover 22. Subsequently, the binding rope 46 is passed through the through holes on the mounting plate 41, the testing platform 21, the noise reduction cover 22, and the rubber pad 27 in sequence, and then wrapped around the compressor body 28. The other end is tied to the fixing frame 42. Then, the second motor 48 in the starting fixing assembly is activated. The second motor 48 drives the worm gear 49 to rotate. The worm gear 49 drives the meshing worm wheel 47 and the long shaft 44 to rotate. The wire roller 45 on the long shaft 44 rotates accordingly and tightens the two sets of symmetrically distributed binding ropes 46, thereby... The compressor body 28 is firmly fixed on the rubber pad 27 to ensure its stability during the testing process. After the compressor body 28 is tested, if it is necessary to switch the test object, the first motor 36 in the intermittent rotation assembly is started. The first motor 36 drives the first transmission roller 37 to rotate, which drives the second transmission roller 38 and the long rod 31 to rotate through the transmission belt 39. The long rod 31 drives the disc 32 and the smooth rod 33 to rotate. The smooth rod 33 moves in the four sets of symmetrical through slots of the intermittent rotating disc 35. When the smooth rod 33 enters the through slot, it drives the intermittent rotating disc 35 and the rotating shaft 34 to rotate, so that the test table 21 can rotate intermittently (each rotation is 90 degrees, and the position of the two sets of noise reduction covers 22 can be switched by rotating 180 degrees). It stops precisely at the test position so that when the tester tests the compressor body 28 in one set of noise reduction covers 22, other personnel can disassemble and assemble the compressor body 28 in the other set, ensuring the smooth progress of the test work.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise reduction device for testing automotive air conditioning compressors, comprising a workbench (1), characterized in that: It also includes an intermittent rotation assembly set on the workbench (1), a test table (21) set on the top of the workbench (1), a noise reduction cover (22) set on the top of the test table (21), a sound insulation felt (23) fixedly connected to the bottom of the noise reduction cover (22), a mounting bolt (24) set inside the noise reduction cover (22), an observation window (25) opened on the noise reduction cover (22), a sound insulation cotton (26) fixedly connected to the inner wall of the noise reduction cover (22), a rubber pad (27) fixedly connected to the inside of the noise reduction cover (22), a compressor body (28) set inside the noise reduction cover (22), and a fixing assembly set at the bottom of the test table (21). The mounting bolt (24) is threadedly connected to the inside of the test table (21), the compressor body (28) is set on the top of the rubber pad (27), and the fixing assembly fixes the compressor body (28) inside the noise reduction cover (22). The intermittent rotation assembly drives the test table (21) to rotate.

2. The noise reduction device for testing automotive air conditioning compressors according to claim 1, characterized in that: The sound insulation cotton (26) has a corresponding through groove at the corresponding position of the observation window (25).

3. The noise reduction device for testing automotive air conditioning compressors according to claim 1, characterized in that: Two sets of noise reduction covers (22) are provided, and the two sets of noise reduction covers (22) are symmetrically distributed on the top of the testing platform (21).

4. The noise reduction device for testing automotive air conditioning compressors according to claim 1, characterized in that: The intermittent rotation assembly includes a long rod (31) rotatably connected inside the worktable (1), a second transmission roller (38) fixedly connected to the long rod (31), a first motor (36) fixedly connected inside the worktable (1), a first transmission roller (37) fixedly connected to the output end of the first motor (36), a transmission belt (39) connecting the first transmission roller (37) and the second transmission roller (38), a disc (32) fixedly connected to the long rod (31), a rotating shaft (34) rotatably connected inside the worktable (1), an intermittent rotating disk (35) fixedly connected to the rotating shaft (34), and a smooth rod (33) fixedly connected to the top of the disc (32). The long rod (31) is fixedly connected to the top of the rotating shaft (34), and the smooth rod (33) is located inside the intermittent rotating disk (35). The long rod (31) is driven to rotate by the first motor (36), and the rotating long rod (31) drives the detection table (21) to rotate intermittently.

5. The noise reduction device for testing automotive air conditioning compressors according to claim 4, characterized in that: The intermittent rotating disk (35) has a matching through groove at the corresponding position of the smooth rod (33), and there are four sets of through grooves. The four sets of through grooves are symmetrically distributed on the intermittent rotating disk (35), and the smooth rod (33) is set inside the through groove of the intermittent rotating disk (35).

6. The noise reduction device for testing automotive air conditioning compressors according to claim 1, characterized in that: The fixing assembly includes a mounting plate (41) fixedly connected to the bottom of the testing table (21), a fixing bracket (42) fixedly connected to the bottom of the mounting plate (41), a first semicircular block (43) fixedly connected to the bottom of the mounting plate (41), a long shaft (44) rotatably connected inside the first semicircular block (43), a wire roller (45) fixedly connected to the long shaft (44), a binding rope (46) wound on the wire roller (45), a worm gear (47) fixedly connected to the long shaft (44), and a second... Two semicircular blocks (410), a second motor (48) fixedly connected to the bottom of the mounting plate (41), a worm gear (49) fixedly connected to the output end of the second motor (48), a binding rope (46) with one end away from the wire roller (45) tied to the fixing frame (42), the binding rope (46) being set inside the mounting plate (41), the testing table (21), the noise reduction cover (22) and the rubber pad (27), the worm gear (49) being rotatably connected inside the second semicircular block (410), and the worm wheel (47) meshing with the outside of the worm gear (49).

7. The noise reduction device for testing automotive air conditioning compressors according to claim 6, characterized in that: There are two sets of binding ropes (46), which are symmetrically distributed on the long axis (44).

8. The noise reduction device for testing automotive air conditioning compressors according to claim 6, characterized in that: The mounting plate (41), the testing platform (21), the noise reduction cover (22), and the rubber pad (27) all have corresponding through holes at the corresponding positions of the binding rope (46). The binding rope (46) is sequentially installed inside the through holes of the mounting plate (41), the testing platform (21), the noise reduction cover (22), and the rubber pad (27).

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