Engine noise testing device

Abstract

The utility model provides an engine noise testing device, which relates to the technical field of engine testing and comprises a bottom plate, a sound insulation cavity is mounted at the top end of the bottom plate, a door body is hinged to the front end of the sound insulation cavity, a controller is mounted at the top end of the sound insulation cavity, and a rotating mechanism is arranged at the bottom end in the sound insulation cavity. A placing plate is mounted at the lower part of the interior of the sound insulation cavity, and a clamping mechanism is arranged above the placing plate; the clamping mechanism is arranged above the placing plate, and the first rotating wheel, the threaded rod, the threaded sleeve, the clamping plate, the limiting groove, the limiting block, the rotating block, the air cylinder and the top plate of the clamping mechanism are matched with one another, so that the engine can be transversely and longitudinally clamped and fixed, and the engine is more stable during noise testing; other noise caused by shaking is avoided, so that the test structure is more accurate, and the accuracy of the device in use is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine testing, in particular to an engine noise testing device. Background Art

[0002] With the development of economy and the continuous improvement of science and technology, my country's automobile industry has developed very rapidly. Automobile engine is one of the most important parts of automobile. During the production and processing of automobile engine, the engine noise needs to be tested and processed.

[0003] For example, application number CN213336465U discloses an "engine noise detection device," specifically disclosing: the front end of a telescopic rod is positioned outside a main structure casing, the distal end is positioned inside the casing, and the bottom of the casing is supported by a compression spring. A length adjustment button is located at the top of the casing, and a length-limiting rack is provided on the sidewall of the telescopic rod. The outer end of the length-adjusting button is positioned outside the casing, while the inner end is positioned inside the casing. A small spring is used to compress the inner end of the length-adjusting button so that it engages the length-limiting rack. However, when testing engine noise, the device must be placed in a soundproof chamber to reduce interference from external sounds. This technique makes it difficult to position the engine within the soundproof chamber, resulting in the engine shaking during startup, generating noise and inaccurate test results, thereby reducing the accuracy of the device during use. Therefore, the present invention proposes an engine noise testing device to address this issue. Summary of the Invention

[0004] In response to the above problems, the present invention proposes an engine noise testing device, which solves the problem in the prior art that it is inconvenient to prevent the engine from being positioned in the soundproof chamber, causing the engine to shake easily when started, generating noise, making the test results inaccurate, and thus reducing the accuracy of the device when used.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: an engine noise testing device, comprising a base plate, a sound insulation chamber installed at the top of the base plate, a door body hingedly installed at the front end of the sound insulation chamber, a controller installed at the top of the sound insulation chamber, a plurality of microphones installed inside the sound insulation chamber, a rotating mechanism provided at the bottom end of the interior of the sound insulation chamber, a placement plate installed below the interior of the sound insulation chamber, and a clamping mechanism provided above the placement plate;

[0006] The clamping mechanism includes a first rotating wheel, a threaded rod, a threaded sleeve, a clamping plate and a limiting structure. The first rotating wheel is installed at one end of the placing plate. A threaded rod is installed inside the placing plate. One end of the first rotating wheel is connected to one end of the threaded rod. The threads at both ends of the outer wall of the threaded rod are in opposite directions. The outer wall of the threaded rod is symmetrically provided with threaded sleeves, and a clamping plate is fixedly installed on the top of the threaded sleeve.

[0007] A further improvement is that the limiting structure includes a limiting groove and a limiting block, the limiting groove is opened on one side of the placement plate, the limiting block is arranged inside the limiting groove, and one end of the limiting block is connected to one end of the threaded sleeve.

[0008] A further improvement is that the cross section of the limiting groove is larger than the cross section of the limiting block, and a sliding structure is formed between the limiting groove and the limiting block.

[0009] A further improvement is that a groove is provided at the top of the sound insulation cavity, a rotating block is installed inside the groove, a cylinder is installed at the bottom of the rotating block, and a top plate is installed at the bottom of the cylinder.

[0010] Further improvements are: the rotating mechanism includes a second rotating wheel, a worm, a worm wheel, a guide groove and a guide block, the second rotating wheel is installed at the front end of the sound insulation cavity, the worm is installed inside the sound insulation cavity, one end of the second rotating wheel is connected to one end of the worm, one side of the worm is engaged with a worm wheel, the top of the worm wheel is connected to the bottom end of the placement plate, the guide groove is opened inside the sound insulation cavity, a guide block is provided inside the guide groove, and the top of the guide block is connected to the bottom end of the placement plate.

[0011] A further improvement is that: two guide blocks are provided inside the guide groove, and the two guide blocks are symmetrically distributed about the central axis of the guide groove.

[0012] The beneficial effects of the present invention are as follows: by arranging a clamping mechanism above the placement plate, the engine can be clamped and fixed horizontally and vertically by utilizing the mutual cooperation between the first rotating wheel, threaded rod, threaded sleeve, clamping plate, limiting groove, limiting block and rotating block, cylinder and top plate of the clamping mechanism, so that the engine is more stable during noise testing and will not generate other noises due to shaking, so the test structure is more accurate, thereby greatly improving the accuracy of the device during use; by arranging a rotating mechanism at the bottom end inside the sound insulation cavity, the engine can be driven to rotate by utilizing the mutual cooperation between the second rotating wheel, worm, worm wheel, guide groove and guide block of the rotating mechanism, so that the engine can perform multi-directional sound reception test processing during testing, so that the test effect of the engine is more comprehensive, thereby greatly improving the practicality of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of the electric telescopic rod of the utility model;

[0015] Figure 3 This is a schematic diagram of the overall structure of the clamping mechanism of the present utility model;

[0016] Figure 4 It is a schematic diagram of the overall structure of the rotating mechanism of the present utility model.

[0017] Among them: 1. Bottom plate; 2. Sound insulation chamber; 3. Door body; 4. Controller; 5. Microphone; 6. Placement plate; 7. Rotating block; 8. Cylinder; 9. Top plate; 10. First rotating wheel; 11. Threaded rod; 12. Threaded sleeve; 13. Clamp; 14. Limiting groove; 15. Limiting block; 16. Second rotating wheel; 17. Worm; 18. Worm wheel; 19. Guide groove; 20. Guide block. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0019] according to Figure 1 、 2 As shown in Figures 3 and 4, this embodiment proposes an engine noise testing device, comprising a base plate 1, a soundproof chamber 2 is installed on the top of the base plate 1, a door body 3 is hingedly installed on the front end of the soundproof chamber 2, a controller 4 is installed on the top of the soundproof chamber 2, a plurality of microphones 5 are installed inside the soundproof chamber 2, a rotating mechanism is provided at the bottom end of the inside of the soundproof chamber 2, a placement plate 6 is installed below the inside of the soundproof chamber 2, and a clamping mechanism is provided above the placement plate 6. Start the engine, use the microphone 5 to collect sound, and transmit the collected results to the controller 4 for analysis. Let the engine run at different speeds to collect data at different speeds.

[0020] The clamping mechanism includes a first rotating wheel 10, a threaded rod 11, a threaded sleeve 12, a clamping plate 13 and a limiting structure. The first rotating wheel 10 is installed at one end of the placing plate 6, and a threaded rod 11 is installed inside the placing plate 6. One end of the first rotating wheel 10 is connected to one end of the threaded rod 11, and the threads at both ends of the outer wall of the threaded rod 11 are in opposite directions. The outer wall of the threaded rod 11 is symmetrically provided with a threaded sleeve 12, and the top of the threaded sleeve 12 is fixedly installed with a clamping plate 13. When in use, the engine is placed on the top of the placing plate 6, and then the first rotating wheel 10 drives the threaded rod 11 to rotate, thereby driving the two threaded sleeves 12 to move, and then under the limit of the limiting groove 14 and the limiting block 15, the threaded sleeve 12 is used to drive the clamping plate 13 to move, and then the two clamping plates 13 are used to clamp the engine, so that the engine is more stable during noise testing and will not generate other noises due to shaking, so the test structure is more accurate, thereby greatly improving the accuracy of the device when in use.

[0021] The limiting structure includes a limiting groove 14 and a limiting block 15. The limiting groove 14 is opened on one side of the placement plate 6. The limiting block 15 is arranged inside the limiting groove 14. One end of the limiting block 15 is connected to one end of the threaded sleeve 12. The cross section of the limiting groove 14 is larger than the cross section of the limiting block 15. A sliding structure is formed between the limiting groove 14 and the limiting block 15. When in use, the threaded sleeve 12 can be limited when moving by utilizing the mutual cooperation between the limiting groove 14 and the limiting block 15, so that the threaded sleeve 12 is more stable when moving.

[0022] A groove is provided at the top of the sound insulation cavity 2, a rotating block 7 is installed inside the groove, a cylinder 8 is installed at the bottom end of the rotating block 7, and a top plate 9 is installed at the bottom end of the cylinder 8. When in use, the cylinder 8 is started to drive the top plate 9 to move downward, and the top plate 9 is used to position the top of the engine. When the engine rotates, the rotating block 7 rotates inside the groove, making the engine more stable during testing.

[0023] The rotating mechanism includes a second rotating wheel 16, a worm 17, a worm gear 18, a guide groove 19, and a guide block 20. The second rotating wheel 16 is mounted at the front end of the sound insulation chamber 2, and the worm 17 is mounted inside the sound insulation chamber 2. One end of the second rotating wheel 16 is connected to one end of the worm 17. One side of the worm 17 is meshed with a worm gear 18. The top end of the worm gear 18 is connected to the bottom end of the placement plate 6. The guide groove 19 is opened inside the sound insulation chamber 2. A guide block 20 is provided inside the guide groove 19. The top end of the guide block 20 is connected to the bottom end of the placement plate 6. During use, rotating the second rotating wheel 16 drives the worm 17 to rotate. Since the worm 17 and the worm gear 18 are meshed with each other, the placement plate 6 is rotated by the worm gear 18 under the limit of the guide groove 19 and the guide block 20, and then the engine is rotated. This allows the engine to perform multi-directional sound reception testing during testing, making the engine testing effect more comprehensive, thereby greatly improving the practicality of the device during use.

[0024] Two guide blocks 20 are provided inside the guide groove 19, and the two guide blocks 20 are symmetrically distributed about the central axis of the guide groove 19. When in use, the placement plate 6 can be guided during rotation by utilizing the mutual cooperation between the guide groove 19 and the guide blocks 20, so that the placement plate 6 is more stable during rotation.

[0025] Working principle: The staff first places the engine on the top of the placement plate 6, and then rotates the first wheel 10 to drive the threaded rod 11 to rotate, thereby driving the two threaded sleeves 12 to move, and then under the limit of the limit groove 14 and the limit block 15, the threaded sleeve 12 is used to drive the clamping plate 13 to move, and then the two clamping plates 13 are used to clamp the engine. At this time, the cylinder 8 is started to drive the top plate 9 to move downward, and the top plate 9 is used to position the top of the engine. At this time, the door body 3 is closed, the engine is started, and the microphone 5 is used to collect the sound. The collected results are transmitted to the controller 4 for analysis, and the engine is allowed to run at different speeds and collect data at different speeds. When the position of the engine needs to be adjusted, the second wheel 16 is rotated to drive the worm 17 to rotate. Since the worm 17 and the worm wheel 18 are engaged with each other, the worm wheel 18 is used to drive the placement plate 6 to rotate under the limit of the guide groove 19 and the guide block 20, and then the engine is driven to rotate. At this time, the engine is started, and data is collected repeatedly to conduct a comprehensive test on the engine noise.

[0026] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An engine noise testing device, comprising a base plate (1), characterized in that: A soundproof chamber (2) is installed at the top of the bottom plate (1), a door body (3) is hingedly installed at the front end of the soundproof chamber (2), a controller (4) is installed at the top of the soundproof chamber (2), a plurality of microphones (5) are installed inside the soundproof chamber (2), a rotating mechanism is provided at the bottom end of the inside of the soundproof chamber (2), a placement plate (6) is installed below the inside of the soundproof chamber (2), and a clamping mechanism is provided above the placement plate (6); The clamping mechanism comprises a first rotating wheel (10), a threaded rod (11), a threaded sleeve (12), a clamping plate (13) and a limiting structure, wherein the first rotating wheel (10) is mounted on one end of a placement plate (6), a threaded rod (11) is mounted inside the placement plate (6), one end of the first rotating wheel (10) is connected to one end of the threaded rod (11), the threads at both ends of the outer wall of the threaded rod (11) are in opposite directions, the outer wall of the threaded rod (11) is symmetrically provided with a threaded sleeve (12), and the top end of the threaded sleeve (12) is fixedly mounted with a clamping plate (13).

2. The engine noise testing device according to claim 1, characterized in that: The limiting structure comprises a limiting groove (14) and a limiting block (15), wherein the limiting groove (14) is opened on one side inside the placement plate (6), and the limiting block (15) is arranged inside the limiting groove (14), and one end of the limiting block (15) is connected to one end of the threaded sleeve (12).

3. The engine noise testing device according to claim 2, characterized in that: The cross section of the limiting groove (14) is larger than the cross section of the limiting block (15), and a sliding structure is formed between the limiting groove (14) and the limiting block (15).

4. The engine noise testing device according to claim 3, characterized in that: A slot body is provided at the top end of the sound insulation cavity (2), a rotating block (7) is installed inside the slot body, a cylinder (8) is installed at the bottom end of the rotating block (7), and a top plate (9) is installed at the bottom end of the cylinder (8).

5. The engine noise testing device according to claim 1, characterized in that: The rotating mechanism includes a second rotating wheel (16), a worm (17), a worm wheel (18), a guide groove (19) and a guide block (20), wherein the second rotating wheel (16) is installed at the front end of the sound insulation cavity (2), the worm (17) is installed inside the sound insulation cavity (2), one end of the second rotating wheel (16) is connected to one end of the worm (17), one side of the worm (17) is meshed with a worm wheel (18), the top end of the worm wheel (18) is connected to the bottom end of the placement plate (6), the guide groove (19) is opened inside the sound insulation cavity (2), the guide block (20) is provided inside the guide groove (19), and the top end of the guide block (20) is connected to the bottom end of the placement plate (6).

6. The engine noise testing device according to claim 5, characterized in that: Two guide blocks (20) are provided inside the guide groove (19), and the two guide blocks (20) are symmetrically distributed about the central axis of the guide groove (19).

Images