A motor housing leak detection apparatus
By fixing the housing with a support plate and a waterproof shell, high-pressure gas is introduced only at the connection gap between the front cover and the housing, which solves the problem of low detection accuracy in the existing technology and enables accurate leakage detection at the connection gap between the front cover and the housing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI MOTION CONTROL MOTOR CO LTD
- Filing Date
- 2025-09-30
- Publication Date
- 2026-07-21
AI Technical Summary
Existing motor housing leak detection equipment cannot accurately detect leaks at the connection gap between the front cover and the housing, resulting in low detection accuracy.
A leak detection device for motor housing was designed. The housing is fixed by a support plate, a waterproof shell and a clamping mechanism. The waterproof shell covers the rear of the housing. High-pressure gas is introduced only at the gap between the front cover and the housing. The location of the bubbles is observed to determine the leak.
It improves the detection accuracy at the connection gap between the front cover and the housing, avoids misjudgments at the housing sidewall and rear cover, and ensures the accuracy of leakage judgment.
Smart Images
Figure CN224535322U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor manufacturing technology, and in particular to a leak detection device for motor housing. Background Technology
[0002] Electric motors are widely used in industrial production, household appliances, transportation, and many other fields. They typically consist of a stator, rotor, and motor housing. The motor housing comprises a casing, a front cover, and a rear cover. Together, these three covers form a sealed cavity to protect the internal precision components such as the stator and rotor from external dust, moisture, and other impurities, ensuring long-term stable operation. In actual motor assembly and use, the front cover's sealing reliability is particularly critical to the overall motor performance because it needs to interface with transmission components and external structures. If the connection gap between the front cover and the casing is not properly sealed, external water, dust, and other impurities will preferentially enter the casing through the leak point in the front cover, significantly reducing the motor's lifespan and operational reliability. Therefore, targeted leak testing of the front cover's seal is a crucial quality control step in motor production. Currently, immersion leak testing equipment is commonly used to test the connection gap between the front cover and the casing. The operator first clamps the entire motor housing using a clamping mechanism to ensure its stability during testing. Next, the operator immerses the entire motor housing in a water-filled testing container and then introduces gas into the housing. After a period of time, the operator observes the water for bubbles using manual or visual inspection. The presence of bubbles indicates a leak in the motor housing. This leak detection method, requiring the entire motor housing to be submerged, cannot detect leaks only at the connection between the front cover and the housing. This means bubbles may originate from the housing sidewalls, rear cover, or other areas, making it difficult for the operator to accurately determine if the leak is located at the connection between the front cover and the housing, thus reducing the accuracy of the leak detection at this connection point. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a leak detection device for motor housings, which helps improve the detection accuracy at the connection gap between the front cover and the housing.
[0004] The motor housing leak detection device according to an embodiment of the present invention includes a water tank for storing water; a mounting plate disposed inside the water tank, the mounting plate having a support plate and a waterproof shell, the support plate and the waterproof shell being connected, the support plate having a clearance hole communicating with the waterproof shell, the clearance hole being for the shell to pass through, so that the rear part of the shell extends into the waterproof shell and the flange on the front part of the shell abuts against the support plate; a pressing mechanism disposed on the mounting plate, the pressing mechanism being used to press the flange on the front part of the shell against the support plate; a lifting drive mechanism disposed inside the water tank, the lifting drive mechanism being able to drive the mounting plate to descend, so that the mounting plate, the support plate, the waterproof shell and the front end cover on the front part of the shell are submerged in water; and a pressurizing gas supply mechanism being used to fill the shell with gas greater than atmospheric pressure.
[0005] It has at least the following beneficial effects: When inspecting the connection gap between the front cover and the housing, the operator first passes the housing through the clearance hole on the support plate, allowing the rear of the housing to extend into the waterproof shell connected to the support plate, while simultaneously ensuring the front flange of the housing abuts against the support plate. The operator then operates the clamping mechanism to press the front flange of the housing firmly against the support plate, thus fixing the housing in place. Next, the lifting drive mechanism is activated, causing the mounting plate to lower the support plate, waterproof shell, and housing, ensuring that the mounting plate, support plate, waterproof shell, and front cover are completely submerged in the water tank. Because the front flange of the housing remains abutted against the support plate, and the rear of the housing is completely inserted into the waterproof shell, the side walls and rear cover of the housing will not come into contact with the water in the tank. Finally, the operator activates the pressurization and air supply mechanism, which introduces gas at a pressure greater than atmospheric pressure into the housing. If there is a leak in the connection gap between the front cover and the housing, air bubbles will only form in the submerged area of the front cover. The waterproof shell works in conjunction with the support plate. When the rear of the shell extends into the waterproof shell and the flange on the front of the shell abuts against the support plate, the waterproof shell can completely cover the rear of the shell and the rear end cover. This prevents the side walls of the shell and the rear end cover from directly contacting the water in the tank, thus avoiding air bubbles generated at the side walls of the shell and the rear end cover during the testing process. If air bubbles are generated in the water tank, they must come from the connection gap between the front end cover and the shell. This ensures that the operator can accurately determine whether there is a leak at the connection gap between the front end cover and the shell, thereby improving the detection accuracy at the connection gap between the front end cover and the shell.
[0006] According to the motor housing leak detection device of this utility model embodiment, the mounting plate is inclined so that the front end cover on the front part of the housing on the mounting plate faces obliquely upward.
[0007] According to the motor housing leak testing device of this utility model embodiment, the support plate is provided with a positioning groove on the side away from the waterproof shell, the clearance hole is provided on the inner bottom wall of the positioning groove, the positioning groove is used for the flange on the front part of the shell to be inserted, and the pressing mechanism is used to press the flange on the front part of the shell onto the inner bottom wall of the positioning groove.
[0008] According to the motor housing leak detection device of this utility model embodiment, a first sealing ring is provided on the inner side wall of the positioning groove, and the inner side wall of the positioning groove abuts against the flange on the front part of the housing through the first sealing ring.
[0009] According to the motor housing leak detection device of the present utility model embodiment, the clamping mechanism includes a clamping block and a pushing component. The pushing component is disposed on the mounting plate. The pushing component can push the clamping block toward the support plate so that the clamping block presses against the front end cover on the front part of the housing and the flange on the front part of the housing is pressed against the support plate.
[0010] According to the motor housing leak detection device of this utility model embodiment, the clamping block is provided with a second sealing ring, the pressurizing air supply mechanism includes an air supply pipe, the air supply pipe is connected to the clamping block, and when the clamping block abuts against the front end cover on the front part of the housing through the second sealing ring, the air supply pipe is inserted into the shaft hole on the front end cover.
[0011] According to the motor housing leak detection device of this utility model embodiment, the air supply pipe has a guide slope on one end facing the support plate.
[0012] According to an embodiment of the present invention, the motor housing leak detection device includes a pushing assembly comprising a guide seat, a push-pull rod, a bending arm, and a handle. The guide seat is disposed on the mounting plate and has a guide hole. The push-pull rod passes through the guide hole and one end of the push-pull rod is connected to the clamping block. The handle has a connecting end and a gripping end. The connecting end of the handle is hinged to the mounting plate. One end of the bending arm is hinged to the other end of the push-pull rod, and the other end of the bending arm is hinged to the handle. When the gripping end of the handle swings toward the support plate, the push-pull rod pushes the clamping block toward the support plate. When the gripping end of the handle swings away from the support plate, the push-pull rod pulls the clamping block away from the support plate.
[0013] According to the motor housing leak detection device of this utility model embodiment, the water tank is provided with an overflow pipe, which is used to discharge the water in the water tank.
[0014] The motor housing leak detection device according to an embodiment of the present invention further includes a water inlet pipe, which is used to transport water to the water tank.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the motor housing according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the motor housing leak detection device according to an embodiment of this utility model; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram of the clamping mechanism; Figure 5 This is a structural diagram of the support plate and the waterproof shell; Figure 6 This is a structural schematic diagram of a leak detection device for motor housings from another perspective; Icon labels: Mounting plate 100; Support plate 110; Positioning groove 111; Clearance hole 112; First sealing ring 113; Waterproof shell 120; Clamping mechanism 200; Clamping block 210; Second sealing ring 211; Guide seat 220; Push-pull rod 230; Bending arm 240; Handle 250; Connecting end 251; Grip end 252; 300; 310; 311; Water tank 400; inlet pipe 410; overflow pipe 420; Housing 10; flange 11; front cover 20; shaft hole 21. Detailed Implementation
[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.
[0018] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.
[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0020] refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 This utility model discloses a leak detection device for motor housing, including a water tank 400, a mounting plate 100, a clamping mechanism 200, a lifting drive mechanism, and a pressurizing air supply mechanism 300. The water tank 400 is used to store water; the mounting plate 100 is disposed inside the water tank 400, and the mounting plate 100 is provided with a support plate 110 and a waterproof shell 120. The support plate 110 and the waterproof shell 120 are connected. The support plate 110 is provided with a clearance hole 112, which communicates with the waterproof shell 120. The clearance hole 112 is used for the shell 10 to pass through, so that the rear part of the shell 10 extends into the waterproof shell 120, and the flange 11 on the front part of the shell 10 abuts against the support plate 110. The clamping mechanism 200 is located on the mounting plate 100 and is used to clamp the flange 11 on the front of the housing 10 onto the support plate 110. The lifting drive mechanism is located inside the water tank 400 and can drive the mounting plate 100 to descend so that the mounting plate 100, the support plate 110, the waterproof housing 120 and the front end cover 20 on the front of the housing 10 are submerged in water. The pressurized air supply mechanism 300 is used to fill the housing 10 with gas at a pressure greater than atmospheric pressure.
[0021] Understandably, when inspecting the connection gap between the front cover 20 and the housing 10, the operator first passes the housing 10 through the clearance hole 112 on the support plate 110, so that the rear of the housing 10 extends into the waterproof housing 120 connected to the support plate 110, while simultaneously abutting the front flange 11 of the housing 10 against the support plate 110. The operator then operates the clamping mechanism 200 to press the front flange 11 of the housing 10 against the support plate 110, thus fixing the position of the housing 10. Next, the lifting drive mechanism is activated, causing the mounting plate 100 to lower the support plate 110, waterproof housing 120, and housing 10, so that the mounting plate 100, support plate 110, waterproof housing 120, and front cover 20 on the front of the housing 10 are completely submerged in the water of the water tank 400. Because the flange 11 on the front of the housing 10 abuts against the support plate 110, and the rear of the housing 10 extends completely into the waterproof housing 120, the side walls and rear end cover of the housing 10 will not come into contact with the water in the water tank 400. Finally, the operator activates the pressurized air supply mechanism 300, which introduces gas at a pressure greater than atmospheric pressure into the housing 10. If there is a leak in the connection gap between the front end cover 20 and the housing 10, air bubbles will only be generated in the submerged area of the front end cover 20. The waterproof shell 120 cooperates with the support plate 110. When the rear part of the shell 10 extends into the waterproof shell 120 and the flange 11 on the front part of the shell 10 abuts against the support plate 110, the waterproof shell 120 can completely wrap the rear part of the shell 10 and the rear end cover. This prevents the side wall of the shell 10 and the rear end cover from directly contacting the water in the water tank 400, and avoids air bubbles generated at the side wall of the shell 10 and the rear end cover during the testing process. This ensures that if air bubbles are generated in the water tank 400, they must come from the connection gap between the front end cover 20 and the shell 10. This ensures that the operator can accurately judge whether there is a leak at the connection gap between the front end cover 20 and the shell 10, thus improving the detection accuracy at the connection gap between the front end cover 20 and the shell 10.
[0022] refer to Figure 2 and Figure 6 The mounting plate 100 is tilted so that the front cover 20 on the front part of the housing 10 on the mounting plate 100 faces obliquely upward. Because the mounting plate 100 is tilted, after the clamping mechanism 200 completes the fixation of the housing 10, the front cover 20 on the front part of the housing 10 will tilt upward, so that the front cover 20 forms an inclined angle with the water surface. This not only makes it easier for bubbles to float to the surface, but also allows the operator to more clearly observe whether bubbles are generated from the connection gap between the front cover 20 and the housing 10, further reducing the risk of misjudgment by the operator.
[0023] refer to Figure 3 and Figure 5The support plate 110 has a positioning groove 111 on the side away from the waterproof shell 120, and a clearance hole 112 is provided on the inner bottom wall of the positioning groove 111. The positioning groove 111 is used to insert the flange 11 on the front part of the shell 10, and the clamping mechanism 200 is used to press the flange 11 on the front part of the shell 10 against the inner bottom wall of the positioning groove 111. It is understood that when it is necessary to inspect the connection gap between the front cover 20 and the shell 10, the operator first passes the shell 10 through the clearance hole 112 on the support plate 110, so that the rear part of the shell 10 extends into the waterproof shell 120 connected to the support plate 110, and at the same time, the flange 11 on the front part of the shell 10 extends into the positioning groove 111 on the support plate 110 and abuts against the inner bottom wall of the positioning groove 111. The inner wall of the positioning groove 111 can position the flange 11 on the housing 10, thereby limiting the position of the housing 10 on the support plate 110 and ensuring that the subsequent leak detection process can be carried out smoothly.
[0024] refer to Figure 5 A first sealing ring 113 is provided on the inner wall of the positioning groove 111. The inner wall of the positioning groove 111 abuts against the flange 11 on the front part of the housing 10 through the first sealing ring 113. It can be understood that after the flange 11 at the front part of the housing 10 extends into the positioning groove 111 on the support plate 110, the flange 11 will abut against the first sealing ring 113 on the inner wall of the positioning groove 111. The first sealing ring 113 makes the inner wall of the positioning groove 111 and the flange 11 fit tightly, so that the first sealing ring 113 can seal the gap between the flange 11 and the inner wall of the positioning groove 111. This prevents the gas from leaking from the contact point between the inner wall of the positioning groove 111 and the flange 11 when the pressurized gas supply mechanism 300 introduces high-pressure gas into the housing 10. This ensures that the high-pressure gas in the housing 10 can only escape from the connection gap between the front cover 20 and the housing 10, thereby improving the detection accuracy at the connection gap between the front cover 20 and the housing 10. In this embodiment of the utility model, a first slot is provided on the inner side wall of the positioning groove 111, and the first sealing ring 113 is engaged in the first slot.
[0025] refer to Figure 3 and Figure 4The clamping mechanism 200 includes a clamping block 210 and a pushing assembly. The pushing assembly is mounted on the mounting plate 100 and can push the clamping block 210 toward the support plate 110, so that the clamping block 210 presses against the front cover 20 on the front of the housing 10, and the flange 11 on the front of the housing 10 is pressed against the support plate 110. It is understood that when it is necessary to inspect the connection gap between the front cover 20 and the housing 10, the operator first passes the housing 10 through the clearance hole 112 on the support plate 110, so that the rear of the housing 10 extends into the waterproof shell 120 connected to the support plate 110, while the flange 11 at the front of the housing 10 abuts against the support plate 110. The operator then manipulates the clamping mechanism 200 located on the mounting plate 100. The pushing component in the clamping mechanism 200 drives the clamping block 210 to move toward the support plate 110 until the clamping block 210 is tightly pressed onto the front end cover 20 at the front of the housing 10. The pressure of the clamping block 210 indirectly and firmly presses the flange 11 at the front of the housing 10 onto the support plate 110, completing the fixing operation of the housing 10 on the mounting plate 100. This prepares for the subsequent leak detection steps, in which the lifting drive mechanism drives the mounting plate 100 to descend and the pressurized air supply mechanism 300 supplies air into the housing 10.
[0026] refer to Figure 4The clamping block 210 is provided with a second sealing ring 211. The pressurized air supply mechanism 300 includes an air supply pipe 310, which is connected to the clamping block 210. When the clamping block 210 abuts against the front cover 20 on the front part of the housing 10 through the second sealing ring 211, the air supply pipe 310 is inserted into the shaft hole 21 on the front cover 20. It can be understood that as the clamping block 210 moves toward the support plate 110, the air supply pipe 310 on the clamping block 210 moves toward the support plate 110 simultaneously, so that the clamping block 210 and the air supply pipe 310 approach the housing 10 on the support plate 110 simultaneously. When the clamping block 210 is tightly abutted against the front cover 20 on the front part of the housing 10 through the second sealing ring 211, the air supply pipe 310 on the clamping block 210 is inserted into the shaft hole 21 on the front cover 20. Next, the pressurizing gas supply mechanism 300 can supply gas to the housing 10 through the gas supply pipe 310 to realize the pressurization operation inside the housing 10. The second sealing ring 211 on the clamping block 210 can seal the gap between the clamping block 210 and the front cover 20 when the clamping block 210 abuts against the front cover 20, so as to prevent gas leakage from the gap between the clamping block 210 and the front cover 20 when the pressurizing gas supply mechanism 300 supplies high-pressure gas to the housing 10 through the gas supply pipe 310, and ensure that the housing 10 can stably maintain a preset gas pressure higher than atmospheric pressure. On the other hand, the sealing effect of the second sealing ring 211 can prevent gas leakage from the gap between the shaft hole 21 and the gas supply pipe 310 inside the housing 10, and avoid the operator's misjudgment of whether there is a leak at the connection gap between the front cover 20 and the housing 10, thereby improving the detection accuracy at the connection gap between the front cover 20 and the housing 10. The air supply pipe 310 is set on the clamping block 210, so that the clamping block 210 and the air supply pipe 310 form a linkage structure. It is not necessary to adjust the position of the air supply pipe 310 and insert it into the shaft hole 21 separately after the clamping block 210 is pressed on the front end cover 20. Instead, the two actions of clamping the clamping block 210 and inserting the air supply pipe 310 into the shaft hole 21 are completed simultaneously by a single action of pushing the component to drive the clamping block 210 to move. This simplifies the operation steps of the motor housing leak detection device.
[0027] In this embodiment of the invention, the clamping block 210 has a second slot on the side facing the support plate 110, and the second sealing ring 211 is engaged in the second slot. In this embodiment of the invention, the pressurized air supply mechanism 300, in addition to the air supply pipe 310, typically includes an air compressor, a pressure regulating valve, a pressure gauge, and a check valve. The air compressor generates compressed gas, which is delivered to the pressure regulating valve via a pipeline. The pressure regulating valve adjusts the gas pressure according to the leak detection requirements. The adjusted gas is then delivered through a pipeline, passes through the check valve, and enters the air supply pipe 310. The air supply pipe 310 guides the gas into the housing 10, while the pressure gauge monitors the gas pressure in the pipeline in real time to ensure that the gas pressure inside the housing 10 is maintained within the set range. The pressurized air supply mechanism 300 is a common mechanism in the field of leak detection and will not be described further here. (Reference) Figure 4 The air supply pipe 310 has a guide slope 311 on one end facing the support plate 110. During the process of the air supply pipe 310 moving with the clamping block 210 and being inserted into the shaft hole 21 of the front cover 20, the guide slope 311 guides the insertion process of the air supply pipe 310, allowing the air supply pipe 310 to be aligned with the shaft hole 21 more smoothly and enter, reducing the insertion process jamming caused by slight deviations in the position of the air supply pipe 310 and the shaft hole 21; on the other hand, the guide slope 311 can reduce the rigid collision between the air supply pipe 310 and the edge of the shaft hole 21 when it is inserted, avoiding damage to the end of the air supply pipe 310 or the front cover 20 due to rigid collision.
[0028] refer to Figure 4 The pushing assembly includes a guide seat 220, a push-pull rod 230, a bending arm 240, and a handle 250. The guide seat 220 is mounted on the mounting plate 100 and has a guide hole. The push-pull rod 230 passes through the guide hole and one end of the push-pull rod 230 is connected to the clamping block 210. The handle 250 has a connecting end 251 and a gripping end 252. The connecting end 251 of the handle 250 is hinged to the mounting plate 100. One end of the bending arm 240 is hinged to the other end of the push-pull rod 230, and the other end of the bending arm 240 is hinged to the handle 250. When the gripping end 252 of the handle 250 swings toward the support plate 110, the push-pull rod 230 pushes the clamping block 210 toward the support plate 110. When the gripping end 252 of the handle 250 swings away from the support plate 110, the push-pull rod 230 pulls the clamping block 210 away from the support plate 110. Understandably, when it is necessary to fix the housing 10, the operator holds the gripping end 252 of the handle 250 and swings it toward the support plate 110. The handle 250 rotates around the hinge point between its connecting end 251 and the mounting plate 100, causing the handle 250 to drive the bending arm 240 to move. The other end of the bending arm 240 pushes the push-pull rod 230, causing the push-pull rod 230 to move toward the support plate 110 along the guide hole on the guide seat 220. This causes the push-pull rod 230 to push the clamping block 210 toward the support plate 110, and finally presses the clamping block 210 onto the front cover 20 to fix the housing 10. When it is necessary to loosen the housing 10, the operator swings the gripping end 252 of the handle 250 away from the support plate 110, so that the handle 250 drives the bending arm 240 to move; the other end of the bending arm 240 pulls the push-pull rod 230, so that the push-pull rod 230 moves along the guide hole away from the support plate 110, thereby pulling the clamping block 210 away from the front cover 20, so that the clamping block 210 loosens the housing 10.
[0029] It should be explained that when the gripping end 252 of the handle 250 swings towards the support plate 110 until the clamping block 210 presses against the housing 10, the hinge point between the handle 250, the bent arm 240, and the push-pull rod 230 will form a specific angle. At this time, the reaction force on the handle 250 allows the handle 250 to maintain its current state in the clamping position without continuously applying external force, thus achieving self-locking fixation of the clamping block 210. This ensures that the housing 10 remains in a stable clamping state during leak testing, preventing the clamping block 210 from loosening due to vibration or external interference, which could lead to clamping force failure. As another embodiment of this utility model, the pushing component includes a linear cylinder. The cylinder body of the linear cylinder is mounted on the mounting plate 100, and the piston rod of the linear cylinder is connected to the clamping block 210. The linear cylinder is used to drive the clamping block 210 closer to or away from the support plate 110.
[0030] refer to Figure 6 The water tank 400 is equipped with an overflow pipe 420 for draining water from the tank. The motor housing leak detection device also includes an inlet pipe 410 for supplying water to the water tank 400. The inlet pipe 410 supplies water to the tank 400 to ensure sufficient water volume for submersion of components such as the front cover 20 during leak testing. The overflow pipe 420 drains excess water when the water level in the tank 400 reaches a preset height, preventing overflow and maintaining a stable water level at a suitable leak testing height. This ensures complete submersion of the front cover 20 and other components being tested without excessively high water levels interfering with the leak testing process. In this embodiment of the utility model, the water outlet end of the water inlet pipe 410 is equipped with a faucet, and the water inlet pipe 410 is connected to the tap water pipe, and the drainage end of the overflow pipe 420 is connected to the drainage pipe in the municipal pipeline.
[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0032] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A leak detection device for motor housing, characterized in that, include: Water tank (400), used for storing water; Mounting plate (100) is provided inside the water tank (400). Mounting plate (100) is provided with support plate (110) and waterproof shell (120). Support plate (110) and waterproof shell (120) are connected. Support plate (110) is provided with clearance hole (112). Clearance hole (112) communicates with waterproof shell (120). Clearance hole (112) is used for shell (10) to pass through so that the rear part of shell (10) extends into waterproof shell (120) and the flange (11) on the front part of shell (10) abuts against support plate (110). A clamping mechanism (200) is provided on the mounting plate (100), and the clamping mechanism (200) is used to clamp the flange (11) on the front of the housing (10) onto the support plate (110); A lifting drive mechanism is provided inside the water tank (400). The lifting drive mechanism can drive the mounting plate (100) to descend so that the mounting plate (100), the support plate (110), the waterproof shell (120), and the front end cover (20) on the front of the shell (10) are submerged in water. A pressurized gas supply mechanism (300) is used to fill the housing (10) with gas at a pressure greater than atmospheric pressure.
2. The motor housing leak detection device according to claim 1, characterized in that: The mounting plate (100) is inclined so that the front end cover (20) on the front part of the housing (10) of the mounting plate (100) faces obliquely upward.
3. The motor housing leak detection device according to claim 1, characterized in that: The support plate (110) is provided with a positioning groove (111) on the side away from the waterproof shell (120). The clearance hole (112) is provided on the inner bottom wall of the positioning groove (111). The positioning groove (111) is used to allow the flange (11) on the front part of the shell (10) to be inserted. The pressing mechanism (200) is used to press the flange (11) on the front part of the shell (10) onto the inner bottom wall of the positioning groove (111).
4. The motor housing leak detection device according to claim 3, characterized in that: The inner wall of the positioning groove (111) is provided with a first sealing ring (113), and the inner wall of the positioning groove (111) abuts against the flange (11) on the front of the housing (10) through the first sealing ring (113).
5. The motor housing leak detection device according to claim 1, characterized in that: The clamping mechanism (200) includes a clamping block (210) and a pushing assembly. The pushing assembly is disposed on the mounting plate (100). The pushing assembly can push the clamping block (210) toward the support plate (110) so that the clamping block (210) presses against the front end cover (20) on the front of the housing (10) and presses the flange (11) on the front of the housing (10) against the support plate (110).
6. The motor housing leak detection device according to claim 5, characterized in that: The clamping block (210) is provided with a second sealing ring (211). The pressurized air supply mechanism (300) includes an air supply pipe (310). The air supply pipe (310) is connected to the clamping block (210). When the clamping block (210) abuts against the front end cover (20) on the front part of the housing (10) through the second sealing ring (211), the air supply pipe (310) is inserted into the shaft hole (21) on the front end cover (20).
7. The motor housing leak detection device according to claim 6, characterized in that: The gas supply pipe (310) has a guide slope (311) on one end facing the support plate (110).
8. The motor housing leak detection device according to claim 5, characterized in that: The pushing assembly includes a guide seat (220), a push-pull rod (230), a bending arm (240), and a handle (250). The guide seat (220) is mounted on the mounting plate (100) and has a guide hole. The push-pull rod (230) passes through the guide hole, and one end of the push-pull rod (230) is connected to the clamping block (210). The handle (250) has a connecting end (251) and a gripping end (252). The connecting end (251) of the handle (250) is hinged to the mounting plate (100). The bending arm (240)... One end of the lever (230) is hinged to the other end of the push-pull rod (240), and the other end of the bent arm (240) is hinged to the handle (250). When the gripping end (252) of the handle (250) swings toward the support plate (110), the push-pull rod (230) pushes the clamping block (210) toward the support plate (110). When the gripping end (252) of the handle (250) swings away from the support plate (110), the push-pull rod (230) pulls the clamping block (210) away from the support plate (110).
9. The motor housing leak detection device according to claim 1, characterized in that: The water tank (400) is provided with an overflow pipe (420) for discharging water from the water tank (400).
10. The motor housing leak detection device according to claim 1, characterized in that: It also includes a water inlet pipe (410) for delivering water to the water tank (400).