Casing positioning and leakage detecting device

Abstract

The utility model discloses a casing positioning leak hunting device, which comprises a base, a fixed plate, a floating plate, a cover plate, positioning seats and positioning columns, the fixed plate is arranged on the base, a shaft hole is arranged at the bottom of a casing, the positioning columns are arranged on the fixed plate and correspond to the shaft hole, lugs are arranged on two sides of the casing, the positioning seats are arranged on the fixed plate and correspond to the lugs one by one, and the floating plate is arranged on the cover plate. An air pipe connector is arranged on one side of the fixing plate, an air inlet hole located in one side of the positioning column is formed in the top face of the fixing plate, an air flow channel connecting the air inlet hole and the air pipe connector is formed in the fixing plate, the cover plate is arranged below the floating plate, and a positioning plug block corresponding to the top opening of the machine shell is arranged at the bottom of the cover plate; a first sealing ring corresponding to the edge of the top of the machine shell is arranged in the first annular groove. Through the above mode, the casing positioning and leak hunting device can position the casing and block the two ends of the casing, and improves the accuracy of leak hunting results and the adaptability to the casing.

Description

Technical Field

[0001] This utility model relates to the field of casing leak detection, and in particular to a casing positioning leak detection device. Background Technology

[0002] Some motor housings are made of cast aluminum, which is lightweight and has high strength. For example, the housing of the rear wheel steering motor of an automobile can be made of cast aluminum blanks and then machined.

[0003] Porosity is a common defect in cast aluminum parts. Therefore, using defective cast aluminum blanks for the casing will result in water and air leakage problems. During the casing manufacturing process, a sealing test, also known as leak testing, is required to ensure the production of qualified products.

[0004] The relatively complex structure of the casing increases the difficulty of locating leaks before testing. During the side leakage process, it is also necessary to seal both ends of the casing to ensure the accuracy of the leak test results, which further increases the design difficulty of the leak detection device and requires further research and development. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a casing positioning and leak detection device to locate and detect leaks in the casing, ensuring the sealing effect at both ends of the casing and adaptability to different casing models.

[0006] To solve the above-mentioned technical problems, the present invention provides a housing positioning and leak detection device, comprising: a base, a fixing plate, a floating plate, a cover plate, a positioning seat, and a positioning post. The fixing plate is disposed on the base, and the housing is placed on the fixing plate. A shaft hole is provided at the bottom of the housing. The positioning post is disposed on the fixing plate and corresponds to the shaft hole. Ear seats are provided on both sides of the housing. The positioning seat is disposed on the fixing plate and corresponds to each ear seat. An air pipe connector is provided on one side of the fixing plate, and a positioning post is provided on the top surface of the fixing plate located on one side of the positioning post. An air inlet is provided in the fixed plate, and an airflow channel is provided to connect the air inlet and the air pipe connector. The floating plate is arranged vertically above the housing. The cover plate is located below the floating plate. The top of the cover plate is provided with a guide post that extends upward through the floating plate. The bottom of the cover plate is provided with a positioning plug corresponding to the opening at the top of the housing. The bottom surface of the cover plate is recessed and has a first annular groove. The first annular groove is provided with a first sealing ring corresponding to the top edge of the housing. The fixed plate is provided with a second annular groove. The second annular groove is provided with a second sealing ring corresponding to the bottom edge of the housing.

[0007] In a preferred embodiment of the present invention, a limit ring is provided at the top of the guide post, and a spring is provided on the guide post between the cover plate and the floating plate.

[0008] In a preferred embodiment of the present invention, the positioning post is provided with a first screw that is connected to the fixing plate, and the fixing plate is provided with a threaded hole corresponding to the first screw.

[0009] In a preferred embodiment of this utility model, an air groove is provided recessed on one side of the positioning post.

[0010] In a preferred embodiment of the present invention, the positioning seat is provided with a U-shaped groove corresponding to the ear seat.

[0011] In a preferred embodiment of the present invention, the positioning block is provided with a second screw that is connected to the cover plate, and the bottom of the positioning block is provided with a chamfer.

[0012] In a preferred embodiment of this utility model, the floating plate is provided with an array of downward-pointing first guide rods, the fixed plate is provided with a guide tube corresponding to the first guide rods, a pressure plate is provided above the floating plate to drive the floating plate to rise and fall, a height-limiting support column is provided between the pressure plate and the floating plate, a third screw is provided on the pressure plate to connect with the top of the height-limiting support column, and a fourth screw is provided on the floating plate to connect with the bottom of the height-limiting support column.

[0013] In a preferred embodiment of the present invention, the base is provided with brackets located on both sides of the fixed plate, the top of the brackets is provided with a cylinder mounting seat, and the cylinder mounting seat is provided with a first cylinder connected to the pressure plate.

[0014] In a preferred embodiment of the present invention, the cylinder mounting base is provided with guide sleeves located on both sides of the first cylinder, and the pressure plate is provided with a second guide rod penetrating the guide sleeves.

[0015] In a preferred embodiment of the present invention, a second cylinder is horizontally arranged on the base, pointing to the location of the housing, and a dotting punch is provided at the end of the second cylinder.

[0016] The beneficial effects of this utility model are as follows: The housing positioning and leak detection device disclosed in this utility model uses the cooperation between the positioning post and the shaft hole to center the housing, and then uses the cooperation between the positioning seat and the ear seat to circumferentially position the housing, avoiding torsion problems and ensuring positioning accuracy. During the process of the cover plate descending with the floating plate, it first enters the top opening of the housing through the positioning plug, and then uses the first sealing ring to seal the top edge of the housing, while the second sealing ring seals the bottom edge of the housing, ensuring the sealing effect at both ends of the housing, which helps to improve the accuracy of the leak detection results. The air pipe connector is connected to an external air supply line to send compressed air into the housing for pressure maintenance. If the air pressure drops, it indicates that the housing is leaking. The operation is simple, and the ear seat, positioning post, positioning plug, first sealing ring and second sealing ring can all be replaced, improving the adaptability to different models of housing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the housing positioning and leak detection device of this utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure after the middle casing has been disassembled;

[0020] Figure 3 yes Figure 1 Cross-sectional views of the fixed plate, housing, floating plate, and cover plate;

[0021] Figure 4 yes Figure 1 A schematic diagram of the structure of the middle casing. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please see Figures 1-4 The embodiments of this utility model include:

[0024] like Figure 1 and Figure 2 The casing positioning and leak testing device shown is used for positioning and sealing testing of casing 4. It includes: base 1, fixed plate 2, floating plate 3, cover plate 14, positioning seat 17 and positioning column 19. The fixed plate 2 is set on the base 1 and can be fixed by bolts, so the structure is stable.

[0025] Place the casing 4 onto the fixing plate 2 for positioning. For example... Figure 4As shown, the bottom of the housing 4 is provided with a shaft hole 42, and the positioning post 19 is set on the fixing plate 2 and corresponds to the shaft hole 42 for center positioning of the housing 4. Ear seats 41 are provided on both sides of the housing 4, and positioning seats 17 are set on the fixing plate 2 and correspond one-to-one with the ear seats 41. In this embodiment, the positioning seat 17 is provided with a U-shaped groove 18 corresponding to the ear seat 41. Through the cooperation between the positioning seat 17 and the ear seat 41, the circumferential positioning of the housing 4 is achieved, avoiding torsion problems and ensuring positioning accuracy. The positioning seat 17 can be fixed with bolts, making disassembly and replacement convenient.

[0026] A first screw 29 is provided in the positioning post 19 to connect with the fixing plate 2. The fixing plate 2 is provided with a threaded hole 30 corresponding to the first screw 29, which facilitates the fixing and replacement of the positioning post 19. An air groove 25 is provided inward on one side of the positioning post 19, which facilitates the airflow in the housing 4 to communicate vertically through the shaft hole 42, ensuring the performance of leak detection.

[0027] An air pipe connector 27 is provided on one side of the fixed plate 2. An air inlet 26 is provided on the top surface of the fixed plate 2, located on one side of the positioning column 19. An air flow channel 28 is provided in the fixed plate 2 to connect the air inlet and the air pipe connector 27. An air supply pipeline is connected to the air pipe connector 27. A valve and a pressure sensor are installed on the air supply pipeline. After compressed air is sent into the housing 4 and reaches the specified pressure, the valve is closed to maintain the pressure. The air pressure is monitored by the pressure sensor. If the air pressure drops, it indicates that the housing 4 is leaking air. The operation is simple.

[0028] The floating plate 3 is arranged above the housing 4 in a height-adjustable manner. The floating plate 3 is provided with an array of first guide rods 10 pointing downwards. The fixed plate 2 is provided with guide tubes 9 corresponding to the first guide rods 10 to guide the floating plate 3 and improve the stability of its vertical floating.

[0029] like Figure 2 As shown, a pressure plate 16 is provided above the floating plate 3 to drive the floating plate 3 to rise and fall. A height limiting support column 33 is provided between the pressure plate 16 and the floating plate 3. A third screw 32 is provided on the pressure plate 16 to connect to the top of the height limiting support column 33. A fourth screw is provided on the floating plate to connect to the bottom of the height limiting support column 33, so as to facilitate the replacement of the height limiting support column 33. By replacing the height limiting support column 33 of different lengths, the lowest position height of the floating plate 3 after it falls can be adjusted to adapt to the casing 4 of different heights.

[0030] A bracket 6 is provided on both sides of the fixed plate 2 on the base 1. A cylinder mounting seat 5 is provided on the top of the bracket 6. A first cylinder 11 connected to the pressure plate 16 is provided on the cylinder mounting seat 5. The extension and retraction of the first cylinder 11 can be controlled by a solenoid valve, which drives the pressure plate 16 and the floating plate 3 to rise and fall, making the operation simple. Guide sleeves 13 are provided on both sides of the first cylinder 11 on the cylinder mounting seat 5. A second guide rod 12 passing through the guide sleeves 13 is provided on the pressure plate 16 to guide the rise and fall of the pressure plate 16.

[0031] Cover plate 14 is positioned below floating plate 3, and a guide post 21 extending upward through floating plate 3 is provided at the top of cover plate 14. Figure 3 As shown, a limit ring 20 is provided at the top of the guide post 21 to limit the downward movement of the guide post 21. A spring 22 is provided on the guide post 21 between the cover plate 14 and the floating plate 3. The spring 22 elastically presses down on the cover plate 14 as the floating plate 3 descends.

[0032] A positioning block 15 corresponding to the top opening of the housing 4 is provided at the bottom of the cover plate 14. In this embodiment, the positioning block 15 is provided with a second screw 23 connected to the cover plate 14, which facilitates replacement. The bottom of the positioning block 15 is chamfered to facilitate the insertion of the positioning block 15 into the top opening of the housing 4 as the cover plate 14 descends, thereby guiding the positioning block 15.

[0033] like Figure 3 As shown, a first annular groove is recessed on the bottom surface of the cover plate 14, and a first sealing ring 31 corresponding to the top edge of the housing 4 is disposed in the first annular groove. The cover plate 14 drives the first sealing ring 31 to press down on the top edge of the housing 4, thereby sealing the top of the housing 4. A second annular groove is provided on the fixing plate 2, and a second sealing ring 24 corresponding to the bottom edge of the housing 4 is disposed in the second annular groove. The bottom of the housing 4 is sealed by the contact between the second sealing ring 24 and the bottom of the housing 4.

[0034] A second cylinder 7 is horizontally mounted on the base 1, pointing towards the location of the housing 4. A dotting punch 8 is mounted at the end of the second cylinder 7. The extension and retraction of the second cylinder 7 can be controlled by a solenoid valve and a PLC controller. The PLC controller is connected to a pressure sensor to obtain pressure changes. If the air pressure drops below the pressure holding range during the pressure holding process, it indicates an air leak. The extension of the second cylinder 7 can be controlled by the solenoid valve to drive the dotting punch 8 to make dotting marks on the outer wall of the housing 4.

[0035] In summary, the casing positioning and leak detection device disclosed in this utility model can locate the casing and seal both ends, facilitate rapid leak detection, improve the accuracy of side leakage results, and enhance adaptability to different casing models.

[0036] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A casing positioning leak testing device for positioning and sealing test of a casing, characterized in that, include: The system comprises a base, a fixed plate, a floating plate, a cover plate, a positioning seat, and a positioning post. The fixed plate is mounted on the base, and the housing is placed on the fixed plate. The bottom of the housing has a shaft hole. The positioning post is mounted on the fixed plate and corresponds to the shaft hole. Ear seats are located on both sides of the housing. The positioning seat is mounted on the fixed plate and corresponds to each ear seat. An air pipe connector is located on one side of the fixed plate. An air inlet is located on the top surface of the fixed plate, next to the positioning post. An airflow channel connecting the air inlet and the air pipe connector is located in the fixed plate. The floating plate is vertically and vertically positioned above the housing. The cover plate is located below the floating plate. A guide post extending upward through the floating plate is located on the top of the cover plate. A positioning plug corresponding to the top opening of the housing is located on the bottom of the cover plate. A first annular groove is recessed on the bottom surface of the cover plate, containing a first sealing ring corresponding to the top edge of the housing. A second annular groove is located on the fixed plate, containing a second sealing ring corresponding to the bottom edge of the housing.

2. The enclosure leak location detection apparatus of claim 1, wherein, A limit ring is provided at the top of the guide post, and a spring is provided on the guide post between the cover plate and the floating plate.

3. The enclosure leak location detection apparatus of claim 1, wherein, The positioning post is provided with a first screw that connects to the fixing plate, and the fixing plate is provided with a threaded hole corresponding to the first screw.

4. The enclosure leak location detection apparatus of claim 1, wherein, An air groove is recessed on one side of the positioning post.

5. The enclosure leak location detection apparatus of claim 1, wherein, The positioning seat is provided with a U-shaped groove corresponding to the ear seat.

6. The enclosure leak location detection apparatus of claim 1, wherein, The positioning block is provided with a second screw that connects to the cover plate, and the bottom of the positioning block is provided with a chamfer.

7. The enclosure leak location detection apparatus of claim 1, wherein, The floating plate is arrayed with downward-pointing first guide rods, the fixed plate is provided with guide tubes corresponding to the first guide rods, a pressure plate is provided above the floating plate to drive the floating plate to rise and fall, a height-limiting support column is provided between the pressure plate and the floating plate, a third screw is provided on the pressure plate to connect to the top of the height-limiting support column, and a fourth screw is provided on the floating plate to connect to the bottom of the height-limiting support column.

8. The enclosure leak location system of claim 7, wherein, The base is provided with brackets located on both sides of the fixed plate, and a cylinder mounting seat is provided on the top of the brackets. A first cylinder connected to the pressure plate is provided on the cylinder mounting seat.

9. The enclosure leak location system of claim 8, wherein, The cylinder mounting base is provided with guide sleeves located on both sides of the first cylinder, and the pressure plate is provided with a second guide rod that passes through the guide sleeves.

10. The enclosure leak detection apparatus of claim 1, wherein, A second cylinder is horizontally arranged on the base, pointing to the location of the housing, and a dotting punch is provided at the end of the second cylinder.

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