High-efficiency testing device for sealing performance of automobile ventilating duct

Abstract

The utility model provides an efficient testing device for the sealing performance of an automobile ventilating duct, which comprises a water tank, a top plate, a hydraulic cylinder, a connecting plate, a rotating disc, a bearing plate, a bearing block, a ventilating block and a plugging head, and is characterized in that a positioning plate is arranged on the outer wall of the water tank, a stand column is arranged on the back surface of the top plate, the hydraulic cylinder is arranged on the top plate, and the connecting plate is arranged on the top plate. The connecting plate is connected with the piston rod, the rotating disc is arranged in the fixing hole, the bearing plate is provided with a connecting hole and a positioning groove, the bearing block is provided with a positioning stud, the ventilation block is provided with a positioning stud, and the plugging heads are arranged on the bearing block and the ventilation block respectively. According to the utility model, the handle on the rotating shaft is rotated, so that the driving wheel on the rotating shaft drives the driven wheel to rotate through the belt, the rotating disc, the bearing plate and the automobile ventilating duct in the testing process are driven to rotate in water, the comprehensive sealing performance test is carried out on the automobile ventilating duct, and the accuracy and the work efficiency of the test result are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive ventilation duct processing technology, specifically a high-efficiency testing device for the sealing performance of automotive ventilation ducts. Background Technology

[0002] Currently, during the processing of automotive ventilation ducts, those with cracks, micropores, or other damage are often mixed into the qualified products because they are not easily identified by the naked eye of operators, resulting in a decrease in the pass rate of automotive ventilation ducts. Existing automotive ventilation duct inspections mostly rely on underwater air pressure testing devices. For example, patent application number 202021613942.4 discloses a device for testing the air tightness of automotive ventilation ducts, which solves the problem of inconvenient duct inspection. However, it has problems such as not being able to conduct comprehensive inspections of automotive ventilation ducts, low stability of automotive ventilation ducts during the inspection process, and low accuracy of the test results. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of existing high-efficiency testing devices for automotive ventilation duct sealing, such as the inability to comprehensively test automotive ventilation ducts, low stability during testing, and low accuracy of test results. This invention provides a high-efficiency testing device for automotive ventilation duct sealing that has a reasonable structural design, can comprehensively test automotive ventilation ducts, has good stability during testing, and provides highly accurate test results.

[0004] The technical solution adopted by this utility model to solve the technical problem is as follows: a high-efficiency testing device for the sealing performance of automotive ventilation ducts, comprising a water tank, a top plate, a hydraulic cylinder, a connecting plate, a rotating disk, a bearing plate, a bearing block, a venting block, and a sealing head, characterized in that: a positioning plate is provided on the outer wall of the water tank, a vertical plate is provided on the positioning plate, and a crossbar is provided between the vertical plates; a column is provided on the back of the top plate, and the bottom end of the column is placed on the crossbar; the hydraulic cylinder is provided on the top plate, and a piston rod is provided on the hydraulic cylinder; the connecting plate is connected to the piston rod; a fixing plate is provided on the connecting plate, and a fixing hole is provided on the fixing plate; the rotating disk is placed in the fixing hole, and a connecting rod is provided between the rotating disks; the bearing plate is provided with a connecting hole and a positioning groove, and the connecting rod passes through the connecting hole; a positioning stud is provided on the bearing block, and the positioning stud on the bearing block passes through the positioning groove on the bearing plate, and a positioning screw is provided on the positioning stud. The ventilation block is equipped with a positioning stud. This stud passes through a positioning groove on another support plate and is installed on the support plate via a positioning screw. The sealing heads are respectively installed on the support block and the ventilation block. The two ends of the automotive ventilation duct are connected to the sealing heads on the support block and the ventilation block, respectively. The two ends of the automotive ventilation duct compress the support block and the ventilation block, thereby compressing the support plate on the crossbar. The support plate compresses the spring, and the spring force pushes the support plate to move in the opposite direction, causing the support block and the ventilation block to compress the automotive ventilation duct from both ends. This improves the stability of the automotive ventilation duct between the support block and the ventilation block, and during the sealing test. Furthermore, the spring allows adjustment of the distance between the support plates, making it suitable for automotive ventilation ducts of different lengths. This not only improves the stability of the automotive ventilation duct between the support block and the ventilation block, but also enhances the versatility of the testing equipment, expands its application range, and reduces the cost of manufacturing multiple sets of testing equipment.

[0005] Preferably, the bottom end of the column of the top plate is provided with a sliding cylinder. The crossbar is inserted into the sliding cylinder, and the sliding cylinder is configured to move back and forth along the crossbar. The column is manually pushed to move the sliding cylinder on the column along the crossbar, moving the car ventilation duct to be tested directly above the water tank. After the car ventilation duct sealing test is completed, the column is pulled along the crossbar to remove the tested car ventilation duct from above the water tank. This facilitates the installation or removal of the car ventilation duct between the support block and the ventilation block, improves work efficiency, and reduces the labor intensity of the operators.

[0006] Preferably, the connecting plate is provided with a vertical plate and a through hole, a bearing is provided on the vertical plate, a rotating shaft is provided inside the bearing, a driving wheel is provided on the rotating shaft, a connecting shaft is provided on the rotating disk, a driven wheel is provided on the connecting shaft, the driven wheel is connected to the driving wheel via a belt, and the belt passes through the through hole. The handle on the rotating shaft is manually turned, so that the driving wheel on the rotating shaft drives the driven wheel to rotate via the belt, causing the rotating disk, the support plate and the car ventilation duct during the test to rotate in the water, so as to conduct a comprehensive sealing test on the car ventilation duct and improve the accuracy of the test results.

[0007] Preferably, the rotating shaft is provided with a handle, which facilitates the rotation of the rotating shaft. The driving wheel on the rotating shaft drives the driven wheel to rotate via a belt, causing the rotating disk, the support plate, and the car ventilation duct during the test to rotate in the water. This allows for a comprehensive sealing test of the car ventilation duct, improving the accuracy of the test results.

[0008] Preferably, a slot is provided on the inner wall of the fixing hole on the fixing plate, and a locking block is provided on the outer wall of the rotating disk. The locking block is inserted into the slot, and the rotating shaft drives the connecting shaft to rotate, so that the rotating disk rotates in the fixing hole. The locking block on the rotating disk rotates in the slot, which improves the stability of the rotating disk during the rotation process, thereby improving the stability of the rotating disk during the rotation process, and further improving the stability of the automotive ventilation duct during the rotation process, thus enhancing the accuracy of the automotive ventilation duct sealing test results.

[0009] Preferably, a blower is provided on the connecting plate, and an air supply pipe is provided on the blower. The air supply pipe is connected to the ventilation block, and the ventilation block and the sealing head on the ventilation block are both set as hollow structures. The blower blows airflow into the hollow ventilation block and sealing head through the air supply pipe. The airflow enters the car ventilation duct, increases the air pressure in the car ventilation duct, performs a comprehensive sealing test on the car ventilation duct, improves the accuracy of the sealing test results, and enhances the quality performance of the car ventilation duct.

[0010] Preferably, a spring is fitted on the connecting rod between the support plate and the rotating disk, connecting both ends of the automotive ventilation duct to the sealing heads on the support block and the vent block, respectively. The two ends of the automotive ventilation duct compress the support block and the vent block, thereby compressing the support plate on the crossbar. The support plate compresses the spring, and the spring force pushes the support plate to move in the opposite direction, thus causing the support block and the vent block to compress the automotive ventilation duct from both ends. This improves the stability of the automotive ventilation duct between the support block and the vent block and during the sealing test. On the other hand, the distance between the support plates can be adjusted by the spring, making it suitable for automotive ventilation ducts of different lengths. This not only improves the stability of the automotive ventilation duct between the support block and the vent block, but also improves the versatility of the testing equipment, expands the application range of the testing equipment, and reduces the cost of manufacturing multiple sets of testing equipment.

[0011] Preferably, both the support block and the vent block are configured to be positioned on the support plate by means of positioning studs and positioning cylinders. Depending on the size, length, and shape of the automotive ventilation duct to be tested, appropriate sealing heads are selected, and the positions of the support block and the vent block on the support plate are adjusted by means of positioning studs and positioning cylinders. The sealing heads are then installed on the support block and the vent block respectively, which improves the versatility of the testing equipment and expands its applicable range.

[0012] Preferably, the sealing head is designed to be replaceable on the support block and the vent block. A pressure gauge is installed on the sealing head on the vent block, and a sealing strip is installed on the outer wall of the sealing head. The sealing head is connected to the support block and the vent block by threads, which facilitates the installation or removal of the sealing head on the support block and the vent block, improves the efficiency of the installation and removal of the sealing head on the support block and the vent block, and also enhances the stability of the sealing head on the support block and the vent block. This, in turn, improves the stability of the automotive ventilation duct between the two sealing heads. The sealing strip can improve the sealing performance between the sealing head and the automotive ventilation duct, thereby improving the accuracy of the test results. According to the automotive ventilation duct with different air vents, the appropriate sealing head can be selected to further improve the sealing performance of the automotive ventilation duct during the test, and also improve the versatility of the test equipment, expanding the scope of application of the test equipment.

[0013] Beneficial effects: This utility model connects the two ends of the automotive ventilation duct to the sealing heads on the support block and the ventilation block, respectively. The two ends of the automotive ventilation duct compress the support block and the ventilation block, thereby compressing the support plate on the crossbar. The support plate compresses the spring, and the spring force pushes the support plate to move in the opposite direction, thus causing the support block and the ventilation block to compress the automotive ventilation duct from both ends. This improves the stability of the automotive ventilation duct between the support block and the ventilation block and during the sealing test. On the other hand, the distance between the support plates can be adjusted by the spring, making it suitable for automotive ventilation ducts of different lengths. This not only improves the stability of the automotive ventilation duct between the support block and the ventilation block, but also improves the versatility of the testing equipment, expands the application range and efficiency of the testing equipment, and reduces the cost of manufacturing multiple sets of testing equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a partial structural diagram of the present invention, illustrating the connection structure between the water tank and the positioning plate.

[0016] Figure 3 This is a partial structural diagram of the present invention, illustrating the connection structure between the crossbar and the slide cylinder.

[0017] Figure 4 This is a partial structural diagram of the present invention, illustrating the connection structure between the connecting plate and the fixing plate.

[0018] Figure 5 This is a partial structural diagram of the present invention, illustrating the connection structure between the rotating disk and the fixed plate.

[0019] Figure 6 This is a partial structural diagram of the present invention, illustrating the connection structure between the limiting groove and the locking block.

[0020] Figure 7 This is a partial structural schematic diagram of the present invention, illustrating the connection structure between the support plate and the positioning groove.

[0021] Figure 8 This is a partial structural diagram of the present invention, illustrating the connection structure between the support plate and the support block.

[0022] Figure 9 This is a schematic diagram of another embodiment of the present invention.

[0023] In the diagram: 1. Water tank, 2. Top plate, 3. Hydraulic cylinder, 4. Connecting plate, 5. Rotary disc, 6. Bearing plate, 7. Bearing block, 8. Ventilation block, 9. Sealing head, 10. Positioning plate, 11. Vertical plate, 12. Horizontal bar, 13. Column, 14. Slide cylinder, 15. Piston rod, 16. Fixing plate, 17. Vertical plate, 18. Through hole, 19. Blower, 20. Air duct, 21. Fixing hole, 22. Slot, 23. Bearing, 24. Rotating shaft, 25. Drive wheel, 26. Handle, 27. Connecting shaft, 28. Connecting rod, 29. Locking block, 30. Driven wheel, 31. Belt, 32. Connecting hole, 33. Positioning groove, 34. Spring, 35. Positioning stud, 36. Positioning cylinder, 37. Pressure gauge, 38. Sealing strip, 39. Limiting ring. Detailed Implementation

[0024] The present invention will now be described in more detail with reference to the accompanying drawings.

[0025] Example 1:

[0026] As attached Figure 1-8As shown, a high-efficiency testing device for the sealing performance of automotive ventilation ducts includes a water tank 1, a top plate 2, a hydraulic cylinder 3, a connecting plate 4, a rotating disk 5, a support plate 6, a support block 7, a vent block 8, and a sealing head 9. The device is characterized in that: a positioning plate 10 is provided on the outer wall of the water tank 1, a vertical plate 11 is provided on the positioning plate 10, and a crossbar 12 is provided between the vertical plates 11; a column 13 is provided on the back of the top plate 2, and the bottom end of the column 13 is placed on the crossbar 12; the hydraulic cylinder 3 is provided on the top plate 2, and a piston is provided on the hydraulic cylinder 3. Rod 15, the connecting plate 4 is connected to piston rod 15, a fixing plate 16 is provided on the connecting plate 4, and a fixing hole 21 is provided on the fixing plate 16. The rotating disk 5 is disposed in the fixing hole 21, and a connecting rod 28 is provided between the rotating disks 5. The bearing plate 6 is provided with a connecting hole 32 and a positioning groove 33, and the connecting rod 28 passes through the connecting hole 32. The bearing block 7 is provided with a positioning stud 35, and the positioning stud 35 on the bearing block 7 passes through the positioning groove 33 on the bearing plate 6, and a positioning screw is provided on the positioning stud 35. The positioning screw cylinder 36 is used to position the vent block 8, which is equipped with a positioning stud 35. The positioning stud 35 on the vent block 8 passes through the positioning groove 33 on another support plate 6 and is installed on the support plate 6 through the positioning screw cylinder 36. The sealing heads 9 are respectively set on the support block 7 and the vent block 8. The two ends of the car ventilation duct are connected to the sealing heads 9 on the support block 7 and the vent block 8, respectively. The two ends of the car ventilation duct squeeze the support block 7 and the vent block 8, thereby squeezing the support plate 6 on the crossbar 12. The support plate 6 squeezes the spring 34, and the elastic force of the spring 34... The bearing plate 6 is pushed to move in the opposite direction, thereby causing the bearing block 7 and the vent block 8 to squeeze it from both ends of the automotive ventilation duct. This improves the stability of the automotive ventilation duct between the bearing block 7 and the vent block 8 and during the sealing test. On the other hand, the distance between the bearing plates 6 can be adjusted by the spring 34, which is suitable for automotive ventilation ducts of different lengths. This not only improves the stability of the automotive ventilation duct between the bearing block 7 and the vent block 8, but also improves the versatility of the test equipment, expands the scope of application of the test equipment, and reduces the cost of manufacturing multiple sets of test equipment.

[0027] Preferably, the bottom end of the column 13 of the top plate 2 is provided with a sliding cylinder 14. The crossbar 12 is inserted into the sliding cylinder 14, and the sliding cylinder 14 is configured to move back and forth along the crossbar 12. The column 13 is manually pushed so that the sliding cylinder 14 on the column 13 moves along the crossbar 12, and the car ventilation duct to be tested is moved to the top of the water tank 1. After the car ventilation duct sealing test is completed, the column 13 is pulled to move along the crossbar 12 so that the tested car ventilation duct is removed from the top of the water tank 1. This facilitates the installation or removal of the car ventilation duct between the support block 7 and the ventilation block 8, improves work efficiency, and reduces the labor intensity of the operators.

[0028] Preferably, the connecting plate 4 is provided with a vertical plate 17 and a through hole 18. A bearing 23 is provided on the vertical plate 17, and a rotating shaft 24 is provided inside the bearing 23. A drive wheel 25 is provided on the rotating shaft 24. A connecting shaft 27 is provided on the rotating disk 5, and a driven wheel 30 is provided on the connecting shaft 27. The driven wheel 30 is connected to the drive wheel 25 through a belt 31, and the belt 31 is passed through the through hole 18. The handle 26 on the rotating shaft 24 is manually turned, so that the drive wheel 25 on the rotating shaft 24 drives the driven wheel 30 to rotate through the belt 31. This causes the rotating disk 5, the support plate 6, and the car ventilation duct during the test to rotate in the water, so as to conduct a comprehensive sealing test on the car ventilation duct and improve the accuracy of the test results.

[0029] Preferably, the rotating shaft 24 is provided with a handle 26, which facilitates the rotation of the rotating shaft 24. The drive wheel 25 on the rotating shaft 24 drives the driven wheel 30 to rotate via the belt 31, thereby causing the rotating disk 5, the support plate 6, and the car ventilation duct during the test to rotate in the water. This allows for a comprehensive sealing test of the car ventilation duct, improving the accuracy of the test results.

[0030] Preferably, a slot 22 is provided on the inner wall of the fixing hole 21 on the fixing plate 16, and a locking block 29 is provided on the outer wall of the rotating disk 5. The locking block 29 is inserted into the slot 22. The rotating shaft 24 drives the connecting shaft 27 to rotate, so that the rotating disk 5 rotates in the fixing hole 21. The locking block 29 on the rotating disk 5 rotates in the slot 22, which improves the stability of the rotating disk 5 during the rotation process, thereby improving the stability of the rotating disk 5 during the rotation process, and further improving the stability of the automotive ventilation duct during the rotation process, thus enhancing the accuracy of the automotive ventilation duct sealing test results.

[0031] Preferably, a blower 19 is provided on the connecting plate 4, and an air supply pipe 20 is provided on the blower 19. The air supply pipe 20 is connected to the ventilation block 8, and the ventilation block 8 and the sealing head 9 on the ventilation block 8 are both set as hollow structures. The blower 19 blows airflow into the hollow ventilation block 8 and sealing head 9 through the air supply pipe 20. The airflow enters the car ventilation duct, increases the air pressure in the car ventilation duct, performs a comprehensive sealing test on the car ventilation duct, improves the accuracy of the sealing test results, and enhances the quality performance of the car ventilation duct.

[0032] Preferably, a spring 34 is sleeved on the connecting rod 28 between the support plate 6 and the rotating disk 5, connecting both ends of the automotive ventilation duct to the sealing heads 9 on the support block 7 and the vent block 8, respectively. The two ends of the automotive ventilation duct compress the support block 7 and the vent block 8, thereby compressing the support plate 6 on the crossbar 12. The support plate 6 compresses the spring 34, and the elastic force of the spring 34 pushes the support plate 6 to move in the opposite direction, thereby causing the support block 7 and the vent block 8 to compress the automotive ventilation duct from both ends. This improves the stability of the automotive ventilation duct between the support block 7 and the vent block 8 and during the sealing test. On the other hand, the distance between the support plates 6 can be adjusted by the spring 34, which is suitable for automotive ventilation ducts of different lengths. This not only improves the stability of the automotive ventilation duct between the support block 7 and the vent block 8, but also improves the versatility of the testing equipment, expands the application range of the testing equipment, and reduces the cost of manufacturing multiple sets of testing equipment.

[0033] Preferably, the support block 7 and the vent block 8 are both configured to be positioned on the support plate 6 by means of positioning studs 35 and positioning screws 36. Depending on the size, length, and shape of the automotive ventilation duct to be tested, a suitable sealing head 9 is selected, and the positions of the support block 7 and the vent block 8 on the support plate 6 are adjusted by means of positioning studs 35 and positioning screws 36. The sealing head 9 is then installed on the support block 7 and the vent block 8 respectively, which improves the versatility of the testing equipment and expands its applicable range.

[0034] Preferably, the sealing head 9 is designed to be replaceable on the support block 7 and the vent block 8. A pressure gauge 37 is installed on the sealing head 9 on the vent block 8, and a sealing strip 38 is installed on the outer wall of the sealing head 9. The sealing head 9 is connected to the support block 7 and the vent block 8 by threads, which facilitates the installation or removal of the sealing head 9 on the support block 7 and the vent block 8, improves the installation and removal efficiency of the sealing head 9 on the support block 7 and the vent block 8, and also enhances the stability of the sealing head 9 on the support block 7 and the vent block 8, thereby improving the stability of the automotive ventilation duct between the two sealing heads 9. The sealing strip 38 can improve the sealing performance between the sealing head 9 and the automotive ventilation duct, thereby improving the accuracy of the test results. According to the automotive ventilation duct with different air vents, the appropriate sealing head 9 can be selected to further improve the sealing performance of the automotive ventilation duct during the test, and also improve the versatility of the test equipment, expanding the scope of application of the test equipment.

[0035] Example 2:

[0036] As attached Figure 9As shown, a high-efficiency testing device for the sealing performance of automotive ventilation ducts includes a water tank 1, a top plate 2, a hydraulic cylinder 3, a connecting plate 4, a rotating disk 5, a support plate 6, a support block 7, a vent block 8, and a sealing head 9. The device is characterized in that: a positioning plate 10 is provided on the outer wall of the water tank 1, a vertical plate 11 is provided on the positioning plate 10, and a crossbar 12 is provided between the vertical plates 11; a column 13 is provided on the back of the top plate 2, and the bottom end of the column 13 is placed on the crossbar 12; the hydraulic cylinder 3 is provided on the top plate 2, and a piston is provided on the hydraulic cylinder 3. Rod 15, the connecting plate 4 is connected to piston rod 15, a fixing plate 16 is provided on the connecting plate 4, and a fixing hole 21 is provided on the fixing plate 16. The rotating disk 5 is disposed in the fixing hole 21, and a connecting rod 28 is provided between the rotating disks 5. The bearing plate 6 is provided with a connecting hole 32 and a positioning groove 33, and the connecting rod 28 passes through the connecting hole 32. The bearing block 7 is provided with a positioning stud 35, and the positioning stud 35 on the bearing block 7 passes through the positioning groove 33 on the bearing plate 6, and a positioning screw is provided on the positioning stud 35. The positioning screw cylinder 36 is used to position the vent block 8, which is equipped with a positioning stud 35. The positioning stud 35 on the vent block 8 passes through the positioning groove 33 on another support plate 6 and is installed on the support plate 6 through the positioning screw cylinder 36. The sealing heads 9 are respectively set on the support block 7 and the vent block 8. The two ends of the car ventilation duct are connected to the sealing heads 9 on the support block 7 and the vent block 8, respectively. The two ends of the car ventilation duct squeeze the support block 7 and the vent block 8, thereby squeezing the support plate 6 on the crossbar 12. The support plate 6 squeezes the spring 34, and the elastic force of the spring 34... The bearing plate 6 is pushed to move in the opposite direction, thereby causing the bearing block 7 and the vent block 8 to squeeze it from both ends of the automotive ventilation duct. This improves the stability of the automotive ventilation duct between the bearing block 7 and the vent block 8 and during the sealing test. On the other hand, the distance between the bearing plates 6 can be adjusted by the spring 34, which is suitable for automotive ventilation ducts of different lengths. This not only improves the stability of the automotive ventilation duct between the bearing block 7 and the vent block 8, but also improves the versatility of the test equipment, expands the scope of application of the test equipment, and reduces the cost of manufacturing multiple sets of test equipment.

[0037] Preferably, the bottom end of the column 13 of the top plate 2 is provided with a sliding cylinder 14. The crossbar 12 is inserted into the sliding cylinder 14, and the sliding cylinder 14 is configured to move back and forth along the crossbar 12. The column 13 is manually pushed so that the sliding cylinder 14 on the column 13 moves along the crossbar 12, and the car ventilation duct to be tested is moved to the top of the water tank 1. After the car ventilation duct sealing test is completed, the column 13 is pulled to move along the crossbar 12 so that the tested car ventilation duct is removed from the top of the water tank 1. This facilitates the installation or removal of the car ventilation duct between the support block 7 and the ventilation block 8, improves work efficiency, and reduces the labor intensity of the operators.

[0038] Preferably, the connecting plate 4 is provided with a vertical plate 17 and a through hole 18. A bearing 23 is provided on the vertical plate 17, and a rotating shaft 24 is provided inside the bearing 23. A drive wheel 25 is provided on the rotating shaft 24. A connecting shaft 27 is provided on the rotating disk 5, and a driven wheel 30 is provided on the connecting shaft 27. The driven wheel 30 is connected to the drive wheel 25 through a belt 31, and the belt 31 is passed through the through hole 18. The handle 26 on the rotating shaft 24 is manually turned, so that the drive wheel 25 on the rotating shaft 24 drives the driven wheel 30 to rotate through the belt 31. This causes the rotating disk 5, the support plate 6, and the car ventilation duct during the test to rotate in the water, so as to conduct a comprehensive sealing test on the car ventilation duct and improve the accuracy of the test results.

[0039] Preferably, the rotating shaft 24 is provided with a handle 26, which facilitates the rotation of the rotating shaft 24. The drive wheel 25 on the rotating shaft 24 drives the driven wheel 30 to rotate via the belt 31, thereby causing the rotating disk 5, the support plate 6, and the car ventilation duct during the test to rotate in the water. This allows for a comprehensive sealing test of the car ventilation duct, improving the accuracy of the test results.

[0040] Preferably, a slot 22 is provided on the inner wall of the fixing hole 21 on the fixing plate 16, and a locking block 29 is provided on the outer wall of the rotating disk 5. The locking block 29 is inserted into the slot 22. The rotating shaft 24 drives the connecting shaft 27 to rotate, so that the rotating disk 5 rotates in the fixing hole 21. The locking block 29 on the rotating disk 5 rotates in the slot 22, which improves the stability of the rotating disk 5 during the rotation process, thereby improving the stability of the rotating disk 5 during the rotation process, and further improving the stability of the automotive ventilation duct during the rotation process, thus enhancing the accuracy of the automotive ventilation duct sealing test results.

[0041] Preferably, a blower 19 is provided on the connecting plate 4, and an air supply pipe 20 is provided on the blower 19. The air supply pipe 20 is connected to the ventilation block 8, and the ventilation block 8 and the sealing head 9 on the ventilation block 8 are both set as hollow structures. The blower 19 blows airflow into the hollow ventilation block 8 and sealing head 9 through the air supply pipe 20. The airflow enters the car ventilation duct, increases the air pressure in the car ventilation duct, performs a comprehensive sealing test on the car ventilation duct, improves the accuracy of the sealing test results, and enhances the quality performance of the car ventilation duct.

[0042] Preferably, a spring 34 is sleeved on the connecting rod 28 between the support plate 6 and the rotating disk 5, connecting both ends of the automotive ventilation duct to the sealing heads 9 on the support block 7 and the vent block 8, respectively. The two ends of the automotive ventilation duct compress the support block 7 and the vent block 8, thereby compressing the support plate 6 on the crossbar 12. The support plate 6 compresses the spring 34, and the elastic force of the spring 34 pushes the support plate 6 to move in the opposite direction, thereby causing the support block 7 and the vent block 8 to compress the automotive ventilation duct from both ends. This improves the stability of the automotive ventilation duct between the support block 7 and the vent block 8 and during the sealing test. On the other hand, the distance between the support plates 6 can be adjusted by the spring 34, which is suitable for automotive ventilation ducts of different lengths. This not only improves the stability of the automotive ventilation duct between the support block 7 and the vent block 8, but also improves the versatility of the testing equipment, expands the application range of the testing equipment, and reduces the cost of manufacturing multiple sets of testing equipment.

[0043] Preferably, the support block 7 and the vent block 8 are both configured to be positioned on the support plate 6 by means of positioning studs 35 and positioning screws 36. Depending on the size, length, and shape of the automotive ventilation duct to be tested, a suitable sealing head 9 is selected, and the positions of the support block 7 and the vent block 8 on the support plate 6 are adjusted by means of positioning studs 35 and positioning screws 36. The sealing head 9 is then installed on the support block 7 and the vent block 8 respectively, which improves the versatility of the testing equipment and expands its applicable range.

[0044] Preferably, the sealing head 9 is designed to be replaceable on the support block 7 and the vent block 8. A pressure gauge 37 is installed on the sealing head 9 on the vent block 8, and a sealing strip 38 is installed on the outer wall of the sealing head 9. The sealing head 9 is connected to the support block 7 and the vent block 8 by threads, which facilitates the installation or removal of the sealing head 9 on the support block 7 and the vent block 8, improves the installation and removal efficiency of the sealing head 9 on the support block 7 and the vent block 8, and also enhances the stability of the sealing head 9 on the support block 7 and the vent block 8, thereby improving the stability of the automotive ventilation duct between the two sealing heads 9. The sealing strip 38 can improve the sealing performance between the sealing head 9 and the automotive ventilation duct, thereby improving the accuracy of the test results. According to the automotive ventilation duct with different air vents, the appropriate sealing head 9 can be selected to further improve the sealing performance of the automotive ventilation duct during the test, and also improve the versatility of the test equipment, expanding the scope of application of the test equipment.

[0045] Preferably, the connecting plate 4 is provided with a limiting ring 39, and the column 13 passes vertically through the limiting ring 39. The connecting plate 4 moves vertically under the action of the hydraulic cylinder 3 and the piston rod 15, so that the limiting ring 39 can move vertically along the column 13, which plays a limiting role on the vertically moving connecting plate 4, preventing the connecting plate 4 from shaking during the vertical movement, thereby improving the accuracy of the drilling column in drilling the automotive ventilation duct and enhancing the drilling quality of the automotive ventilation duct.

[0046] 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 and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0047] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] The parts not covered in this utility model are the same as or can be implemented using existing technologies.

Claims

1. A high-efficiency testing device for the sealing performance of automotive ventilation ducts, comprising a water tank, a top plate, a hydraulic cylinder, a connecting plate, a rotating disk, a rotating shaft, a bearing plate, a bearing block, a venting block, and a sealing head, characterized in that: The water tank has a positioning plate on its outer wall, a vertical plate on the positioning plate, and a horizontal bar between the vertical plates. A column is located on the back of the top plate, with its bottom end resting on the horizontal bar. A hydraulic cylinder is mounted on the top plate, and a piston rod is mounted on the hydraulic cylinder. A connecting plate is connected to the piston rod. A fixing plate with a fixing hole is located on the connecting plate. A rotating disk is positioned within the fixing hole, and a connecting rod is positioned between the rotating disks. A bearing plate has a connecting hole and a positioning groove, through which the connecting rod passes. A positioning stud is located on the bearing block, passing through the positioning groove on the bearing plate, and a positioning screw is mounted on the positioning stud. A positioning stud is located on the venting block, passing through the positioning groove on another bearing plate, and mounted on the bearing plate via the positioning screw. A sealing head is located on both the bearing block and the venting block.

2. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1, characterized in that: The bottom end of the column of the top plate is provided with a sliding cylinder, through which the crossbar is inserted, and the sliding cylinder is configured to move back and forth along the crossbar.

3. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1, characterized in that: The connecting plate is provided with a vertical plate and a through hole. A bearing is provided on the vertical plate, and a rotating shaft is provided inside the bearing. A driving wheel is provided on the rotating shaft. A connecting shaft is provided on the rotating disk, and a driven wheel is provided on the connecting shaft. The driven wheel is connected to the driving wheel through a belt, and the belt passes through the through hole.

4. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 3, characterized in that: A handle is provided on the rotating shaft.

5. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1, characterized in that: The fixing plate has a slot on the inner wall of the fixing hole, and the rotating disk has a block on the outer wall, which is inserted into the slot.

6. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1, characterized in that: The connecting plate is equipped with a blower, and an air supply pipe is installed on the blower. The air supply pipe is connected to the ventilation block, and the ventilation block and the sealing head on the ventilation block are both designed as hollow structures.

7. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1, characterized in that: A spring is fitted onto the connecting rod between the bearing plate and the rotating disk.

8. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1, characterized in that: The aforementioned support block and ventilation block are both configured to be positioned on the support plate by means of positioning studs and positioning cylinders.

9. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1 or 6, characterized in that: The sealing head is designed to be replaceable on the support block and the vent block. A pressure gauge is installed on the sealing head on the vent block, and a sealing strip is installed on the outer wall of the sealing head.

10. The high-efficiency testing device for automotive ventilation duct sealing performance according to claim 1, characterized in that: The connecting plate is provided with a limiting ring, and the column passes vertically through the limiting ring. The connecting plate moves vertically under the action of the hydraulic cylinder and piston rod, so that the limiting ring can move vertically along the column, thereby limiting the vertical movement of the connecting plate.

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