Motor shell multi-runner sealing detection device

Abstract

The invention provides a motor shell multi-runner sealing detection device, a motor shell is provided with runners, a connecting hole communicated with the runners and an air outlet communicated with the runners, and the connecting hole comprises a first cavity communicated with an external product or the runners and a second cavity communicated with the first cavity and the runners. The detection device comprises a first detection mechanism and a second detection mechanism which are placed step by step and detect the motor shell. The first detection mechanism is inserted into the second cavity and communicates with the first cavity, the first detection mechanism communicates with the first cavity, the external product or the flow channel in sequence, and gas is introduced into the first detection mechanism to detect the sealing performance of the first cavity and the connectivity of the flow channel. The second detection mechanism is inserted into the first cavity and communicated with the second cavity, the second detection mechanism is sequentially communicated with the second cavity and the flow channel, and gas is introduced into the second detection mechanism to detect the sealing performance of the second cavity and the connectivity of the flow channel. Through the structure, the detection time is shortened.

Description

Technical Field

[0001] This application relates to the field of airtight detection, and particularly to a multi-channel seal detection device for motor housings. Background Art

[0002] In the field of motor technology, high power density and efficient heat dissipation are the core requirements for the long-term stable operation of motors. With the rapid development of fields such as electric vehicles and industrial automation, the multi-channel cooling structure of motor housings has gradually become the mainstream design. Such channels are arranged through complex paths such as straight arcs and oblique arcs, enabling the cooling medium (such as water and oil) to evenly cover the heat-generating components such as the stator and rotor, thereby optimizing the temperature field distribution.

[0003] However, the complexity of the multi-channel structure poses strict requirements on the manufacturing process: defects such as sand holes and shrinkage cavities may occur during the casting process, resulting in gas leakage between channels; machining errors are likely to cause misalignment between the connecting holes and the channels; and poor welding seals will lead to medium leakage. These defects directly affect the effectiveness of the cooling system - local channel blockages will form heat accumulation areas, while seal failures may cause the cooling medium to contaminate the motor windings.

[0004] Based on the above-mentioned drawbacks, it is necessary to detect the airtightness of the motor housing. However, the problems that occur in the airtightness detection of the multi-channels of the existing motor housing are as follows: The water injection and pumping test method observes the liquid level drop after injecting water into the channels to judge leakage, but micron-level cracks may not show bubbles due to the surface tension of water, resulting in a leakage detection rate as high as 15% - 20%. At the same time, the residual moisture is likely to induce internal corrosion of the generator, instead laying a quality hidden danger. The conventional airtight detection with a single-dimensional detection blind spot can only determine whether there is leakage in the overall channel, but cannot identify local blockages inside the channel (such as the semi-blocked state caused by casting residual molding sand). A case of a new energy vehicle motor shows that although the unblocked channels can pass the 10 kPa pressure holding test, during actual operation, due to a 30% blockage of the channel cross-sectional area, the winding temperature rise exceeds the standard by 47%, ultimately leading to insulation failure. And there is an exponential contradiction between the detection efficiency and the complexity of the multi-channels: when the number of channels increases from a single channel to a multi-branch network, the time-consuming of traditional serial detection (blocking - pressurizing - detecting each channel one by one) surges from 5 minutes to more than 30 minutes. This makes the detection time too long. Therefore, a multi-channel seal detection device for motor housings that reduces the detection time is needed. Summary of the Invention

[0005] In view of this, it is necessary to provide a multi-channel seal detection device for motor housings that reduces the detection time to solve the above problems.

[0006] Embodiments of the present application provide a multi-channel sealing detection device for a motor housing. The motor housing is provided with a flow channel, a connection hole communicating with the flow channel, and an air outlet hole communicating with the flow channel. The connection hole includes: a first cavity communicating with an external product or a flow channel, and a second cavity communicating with the first cavity and the flow channel. The detection device includes a first detection mechanism and a second detection mechanism that are placed step by step to detect the motor housing.

[0007] The first detection mechanism is inserted into the second cavity and communicates with the first cavity. The first detection mechanism is sequentially communicated with the first cavity, the external product or the flow channel. The first detection mechanism introduces gas to detect the sealing performance of the first cavity and the connectivity of the flow channel.

[0008] The second detection mechanism is inserted into the first cavity and communicates with the second cavity. The second detection mechanism is sequentially communicated with the second cavity and the flow channel. The second detection mechanism introduces gas to detect the sealing performance of the second cavity and the connectivity of the flow channel.

[0009] In at least one embodiment of the present application, the air outlet hole includes: a first air outlet hole and a second air outlet hole with openings facing away from each other along the length direction of the motor housing, and a third air outlet hole with an opening facing away from the connection hole along the height direction of the motor housing. The motor housing further includes an air inlet hole with an opening facing away from the flow channel along the width direction of the motor housing.

[0010] The first detection mechanism includes a first cylinder assembly, and the first cylinder assembly includes:

[0011] A first cylinder member that moves along the length direction of the motor housing to be in close connection with the first air outlet hole.

[0012] A second cylinder member that moves along the length direction of the motor housing to be in close connection with the second air outlet hole, and the motor housing is located between the first cylinder member and the second cylinder member.

[0013] A third cylinder member that moves to the end close to the flow channel along the width direction of the motor housing to be in close connection with the air inlet hole.

[0014] In at least one embodiment of the present application, the first detection mechanism further includes a first fixing component that moves along the height of the motor housing in the direction close to the connection hole and is in close connection with the motor housing.

[0015] In at least one embodiment of the present application, the flow channel includes: a first main flow channel and a second main flow channel that are respectively at least connected to one second cavity, and a first branch flow channel that connects the first cavity and any one of the second main channels. The flow channel further includes a second branch flow channel that connects the external product and the first cavity, and the second main flow channel is connected to the third air outlet hole.

[0016] The first detection mechanism further includes:

[0017] The first ventilation assembly is arranged along the height direction of the motor housing, the motor housing is fixedly connected to the first ventilation assembly, and the first ventilation assembly includes:

[0018] The first fixing column and the first fixing assembly clamp the motor housing relative to each other along the height direction of the motor housing:

[0019] A first gas inlet member, used for introducing gas;

[0020] The first blocking member is inserted into the second cavity and has a first passage therein. A first air inlet member is connected to a first blocking member, a first blocking member is connected to a first passage, and the first passage is connected to a first cavity.

[0021] In at least one embodiment of the present application, gas is introduced into the first cavity of the gas inlet member corresponding to the second branch flow channel in steps, and the gas flows through the gas inlet member, the channel, the first cavity, the second branch flow channel and the external product, and the external product is provided with an air flow detection member to detect the sealing of the corresponding first cavity;

[0022] The gas is introduced step by step into the second cavity of the air inlet member corresponding to the first branch channel, and the air flow flows through the air inlet member, the channel, the first cavity, the first branch channel, the second main channel connected to the first branch channel, the third air outlet connected to the second main channel and the external product. The external product is provided with an air flow detection member to detect the sealing of the corresponding first cavity and the connectivity between the first branch channel and the second main channel.

[0023] In at least one embodiment of the present application, the second detection mechanism includes a second cylinder assembly, and the second cylinder assembly includes:

[0024] The fourth cylinder moves along the length direction of the motor housing until it is inserted into the first air outlet;

[0025] The fifth cylinder part is moved along the length direction of the motor housing to be inserted into the second air outlet, and the motor housing is located between the first cylinder part and the second cylinder part.

[0026] In at least one embodiment of the present application, the first air outlet and the second air outlet are respectively communicated with the second main flow channel;

[0027] The fourth cylinder part and the fifth cylinder part include: a detection channel and a detection instrument;

[0028] The detection channel is connected to the first air outlet or the second air outlet to connect the second main flow channel and the detection channel. One end of the detection channel away from the second branch flow channel is connected to a detector.

[0029] In at least one embodiment of the present application, the second detection mechanism includes a second fixing component, and the second fixing component includes:

[0030] The first fixing member moves along the height of the motor housing in the direction close to the connection hole and is inserted into the fourth air hole;

[0031] The second fixing member moves along the height of the motor housing in the direction close to the connection hole and is adhesively connected to the motor housing.

[0032] In at least one embodiment of the present application, the first main flow channel is connected to the air inlet hole, and the air inlet hole communicates with the first main flow channel. The second detection mechanism includes a second air venting assembly. The second air venting assembly is arranged along the height direction of the motor housing. The second air venting assembly and the second fixing assembly relatively clamp the motor housing. The second air venting assembly includes:

[0033] The second fixing column relatively clamps the motor housing with the second fixing member along the height direction of the motor housing;

[0034] The second air inlet member is used for introducing gas;

[0035] The second blocking member is inserted into the first cavity, and a second channel is opened inside. One second air inlet member communicates with one second blocking member, one second blocking member communicates with the second channel, and the second channel communicates with a second cavity.

[0036] In at least one embodiment of the present application, when the second main flow channel is communicated with the first main flow channel, gas is introduced into the air inlet hole. The gas flows through the air inlet hole, the first main flow channel, the second main flow channel connected to the first main flow channel, the second cavity connected to the first main flow channel, the second cavity connected to the second main flow channel, the first air outlet hole or the second air outlet hole communicated with the second main flow channel, the detection channel communicated with the corresponding air outlet hole, and the detector to detect the sealing performance of the second cavity and the connectivity of the first main flow channel and the second main flow channel;

[0037] When the second main flow channel is not communicated with the first main flow channel, gas is introduced into the second air inlet member. The gas flows through the second air inlet member, the second channel, the second cavity, the second main flow channel connected to the second cavity, the other second cavity communicated with the second main flow channel, the first air outlet hole or the second air outlet hole communicated with the second main flow channel, the detection channel communicated with the corresponding air outlet hole, and the detector.

[0038] The beneficial effects of the above-provided multi-channel sealing detection device for the motor housing:

[0039] Through the step-by-step detection method, the first cavity, the second cavity, and the flow channel can be detected specifically, avoiding the single-dimensional detection blind spot that the conventional airtight detection can only determine whether there is leakage in the overall flow channel. The first detection mechanism is inserted into the second cavity, communicated with the first cavity, and sequentially communicated with the external product or the flow channel at the same time. After introducing gas, the airtightness of the first cavity is mainly detected. For example, during the detection process, if there is a leak in the first cavity, the gas will flow out from the leak, resulting in a decrease in pressure or abnormal flow rate shown by the detection equipment, so as to accurately judge the airtight condition of the first cavity. Moreover, the second detection mechanism is inserted into the first cavity, communicated with the second cavity, and sequentially communicated with the second cavity and the flow channel at the same time. After introducing gas, not only the airtightness of the second cavity is detected, but also the connectivity of the flow channel can be detected. For example, if there is a leak in the second cavity, the detection data will be abnormal; if there is a partial blockage in the flow channel, such as a semi-blocked state caused by casting residual sand, the flow resistance of the gas in the flow channel will increase. By detecting the changes in parameters such as the flow rate and pressure of the gas, the connectivity problem of the flow channel can be accurately identified.

[0040] The first detection mechanism can detect the airtightness of multiple first cavities in the same motor housing and the connectivity of different flow channels corresponding to the first cavities simultaneously through a detection device with multiple independent channels for detecting the first cavity.

[0041] The second detection mechanism detects the airtightness of the second cavity and the connectivity of the independent flow channel by detecting the independent flow channel connecting the second cavity. The independent flow channel includes an air inlet and an air outlet. Brief Description of the Drawings

[0042] Figure 1 is a perspective view of the multi-channel seal detection device for the motor housing described in this application;

[0043] Figure 2 is a perspective view of the first detection mechanism described in this application;

[0044] Figure 3 is the main assembly view of the first detection mechanism and the motor housing described in this application;

[0045] Figure 4 is a perspective view of the second detection mechanism described in this application;

[0046] Figure 5 is the main assembly view of the second detection mechanism and the motor housing described in this application;

[0047] Figure 6 is the top view of the assembly of the detection mechanism and the motor housing described in this application;

[0048] Figure 7 is Figure 6 the assembly cross-sectional view of the detection mechanism and the motor housing in A-A in

[0049] Figure 8 For Figure 7 Partial enlarged view of the first detection mechanism and the motor housing in D;

[0050] Figure 9 For Figure 7 Partial enlarged view of the second detection mechanism and the motor housing in D;

[0051] Figure 10 For Figure 6 Assembly sectional view of the detection mechanism and the motor housing in B-B;

[0052] Figure 11 For Figure 10 Partial enlarged view of the second detection mechanism and the motor housing in E;

[0053] Figure 12 For Figure 6 Assembly sectional view of the second detection mechanism and the motor housing in C-C;

[0054] Figure 13 For Figure 12 Partial enlarged view of the first detection mechanism and the motor housing in F;

[0055] Figure 14 For Figure 12 Partial enlarged view of the second detection mechanism and the motor housing in F;

[0056] Figure 15 Stereogram of the motor housing;

[0057] Figure 16 Front view of the motor housing;

[0058] Figure 17 Orthographic front view of the motor housing;

[0059] Figure 18 Top view of the motor housing;

[0060] Explanation of main component symbols

[0061] 100. Motor housing multi-channel sealing detection device; 110. First detection mechanism; 10. First cylinder assembly; 11. First cylinder part; 12. Second cylinder part; 13. Third cylinder part; 20. First fixing assembly; 30. First ventilation assembly; 301. First fixing column; 302. First air inlet part; 303. First plugging part; 304. First channel;

[0062] 120. Second detection mechanism; 1. Second cylinder assembly; 14. Fourth cylinder part; 15. Fifth cylinder part; 141. Detection channel; 142. Detector; 2. Second fixing assembly; 21. First fixing part; 22. Second fixing part; 3. Second ventilation assembly; 31. Second fixing column; 32. Second blocking part; 321. Second channel; 33. Second intake part;

[0063] 200. Motor housing; 210. Flow channel; 211. First main flow channel; 212. Second main flow channel; 213. First branch flow channel; 214. Second branch flow channel; 220. Connection hole; 221. First cavity; 222. Second cavity; 230. Air outlet hole; 231. First air outlet hole; 232. Second air outlet hole; 233. Third air outlet hole; 240. Intake hole; 250. External product; F1. Length direction of the motor housing; F2. Height direction of the motor housing; F3. Width direction of the motor housing. Detailed implementation

[0064] Next, the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0065] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "provided on" another component, it can be directly provided on the other component or there may be an intermediate component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "rear", and similar expressions used in this article are only for the purpose of illustration.

[0066] The embodiment of the present application provides a multi-channel seal detection device for a motor housing. The motor housing is provided with a flow channel, a connection hole communicating with the flow channel, and an air outlet hole communicating with the flow channel. The connection hole includes: a first cavity communicating with an external product or the flow channel, and a second cavity communicating with the first cavity and communicating with the flow channel. The detection device includes a first detection mechanism and a second detection mechanism that are placed step by step and detect the motor housing. The first detection mechanism is inserted into the second cavity and communicates with the first cavity. The first detection mechanism is sequentially communicated with the first cavity, the external product or the flow channel. The first detection mechanism introduces gas to detect the sealing performance of the first cavity and the connectivity of the flow channel. The second detection mechanism is inserted into the first cavity and communicates with the second cavity. The second detection mechanism is sequentially communicated with the second cavity and the flow channel. The second detection mechanism introduces gas to detect the sealing performance of the second cavity and the connectivity of the flow channel.

[0067] Through the step-by-step detection method, the first cavity, the second cavity, and the flow channel can be specifically detected respectively, avoiding the single-dimensional detection blind spot that the conventional airtight detection can only determine whether there is leakage in the whole flow channel. The first detection mechanism is inserted into the second cavity and connected to the first cavity, and is successively connected to the external product or the flow channel at the same time. After introducing gas, the airtightness of the first cavity is mainly detected. For example, during the detection process, if there is a leak in the first cavity, the gas will flow out from the leak, resulting in a pressure drop or abnormal flow rate shown by the detection equipment, so as to accurately judge the airtight condition of the first cavity. Moreover, the second detection mechanism is inserted into the first cavity and connected to the second cavity, and is successively connected to the second cavity and the flow channel at the same time. After introducing gas, not only the airtightness of the second cavity is detected, but also the connectivity of the flow channel can be detected. For example, if there is a leak in the second cavity, the detection data will be abnormal; if there is a partial blockage in the flow channel, such as a semi-blocked state caused by casting residual sand, the flow resistance of the gas in the flow channel will increase, and by detecting the changes in parameters such as the flow rate and pressure of the gas, the connectivity problem of the flow channel can be accurately identified.

[0068] The first detection mechanism can detect the airtightness of multiple first cavities in the same motor housing and the connectivity of different flow channels corresponding to the first cavities simultaneously through a detection device with multiple independent channels for detecting the first cavity.

[0069] The second detection mechanism detects the airtightness of the second cavity and the connectivity of the independent flow channel by connecting the independent flow channel of the second cavity. The independent flow channel includes an air inlet and an air outlet.

[0070] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0071] Please refer to Figure 1 - Figure 18, embodiments of the present application provide a multi-channel sealing detection device 100 for a motor housing. The motor housing 200 is provided with a flow channel 210, a connection hole 220 communicating with the flow channel 210, and an air outlet hole 230 communicating with the flow channel 210. The connection hole 220 includes: a first cavity 221 communicating with an external product 250 or the flow channel 210, and a second cavity 222 communicating with the first cavity 221 and the flow channel 210. The detection device includes a first detection mechanism 110 and a second detection mechanism 120 that are placed step by step to detect the motor housing 200. The first detection mechanism 110 is inserted into the second cavity 222 and communicates with the first cavity 221. The first detection mechanism 110 is sequentially communicated with the first cavity 221, the external product 250, or the flow channel 210. The first detection mechanism 110 introduces gas to detect the sealing performance of the first cavity 221 and the connectivity of the flow channel 210. The second detection mechanism 120 is inserted into the first cavity 221 and communicates with the second cavity 222. The second detection mechanism 120 is sequentially communicated with the second cavity 222 and the flow channel 210. The second detection mechanism 120 introduces gas to detect the sealing performance of the second cavity 222 and the connectivity of the flow channel 210.

[0072] Specifically, the internal structure of the motor housing 200 is the component to be measured. The internal structure of the motor housing 200 includes a flow channel 210, a connection hole 220, and an air outlet hole 230. The internal structure of the motor housing 200 constitutes the basic test object for subsequent sealing detection. A fluid channel system (i.e., the flow channel 210) is provided inside the motor housing 200. The flow channel 210 is connected to external devices or internal structural units through multiple structural nodes, such as the "connection hole 220" and the "air outlet hole 230".

[0073] The connection hole 220 is further divided into a "first cavity 221" and a "second cavity 222". The purpose of this division design is to meet different flow path and sealing detection requirements. By designing the connection hole 220 as two series structures (the first cavity 221 and the second cavity 222), the ventilation path in the actual assembly or use state can be simulated, and the sealing states at different positions can be detected segment by segment.

[0074] This connection hole 220 with a multi-cavity structure is extremely common in fields such as automotive motor housings 200 and thermal management systems because it needs to carry multiple gas-liquid passages to work simultaneously, and the present invention provides a basic test object suitable for detecting complex structures. By providing the air outlet hole 230, the gas flow can also be observed or guided out during the detection process, so as to judge the channel connectivity and sealing reliability.

[0075] The detection device adopts a distributed detection strategy, that is, the first detection mechanism 110 and the second detection mechanism 120 are respectively set up to achieve the goals of structural decoupling and function refinement. In the airtightness detection, if a single mechanism is used to detect multiple cavities or paths at the same time, it may not only cause misjudgment due to mixed paths, but also interfere with the stability of the detection equipment.

[0076] The first detection mechanism 110 is responsible for detecting the first cavity 221 and its extended path, while the second detection mechanism 120 is used to detect the second cavity 222 and its related path. The benefits of distributed detection are as follows: First, different detection pressures or sensitivity parameters can be used in different detection stages to improve adaptability. Second, the structure is simple, the interfaces are precise, and the switching is flexible, which is convenient for subsequent expansion or integration of an automated test system. Third, cross-interference is avoided, and the accuracy and traceability of test data are improved. In practical applications, this structure is particularly suitable for motor housings 200 or heat exchange systems with multiple holes and multiple flow paths, especially for seal verification of motor housings 200 such as new energy vehicle drive motors and electronic control cooling systems before they leave the production line.

[0077] The first detection mechanism 110 physically blocks the outlet of the second cavity 222 by inserting into it, so as to avoid the test gas flowing into the flow channel 210 when detecting the first cavity 221 (that is, avoiding interference from the next-level path). The significance of this "inverted insertion + blocking" design is to effectively isolate the second cavity 222 and the flow channel 210 from the first cavity 221 to form a closed test cavity section. When gas is introduced at this time, if the air pressure still drops in the detection path, it can be judged that the first cavity 221 itself has abnormal sealing. Thus, the test range can be accurately controlled to avoid the influence of the lower-level path. And it is beneficial to locate the leakage source in segments. At the same time, the test steps are simplified, and the test efficiency and accuracy are improved.

[0078] The second detection mechanism 120 inserts into the first cavity 221 and seals the outlet (the part extending to the second cavity 222), thus constructing a sealed detection space limited to the second cavity 222 and the flow channel 210. In this way, the test gas will only act on the connecting section of the second cavity 222 and its flow channel 210 to achieve independent detection of the local sealing performance. Through the separate detection of the local path airtightness, the interference of upstream connecting components is avoided. Regional sealing analysis can be realized in the complex flow channel 210 structure. When the system detection fails, it helps to quickly determine the defective section and reduce the repair time.

[0079] In terms of the device structure, the second detection mechanism 120 is usually equipped with a radially expandable seal or a mechanically pushed-on seal cap to ensure a high-pressure sealed environment after insertion and can match the structures of motor housings 200 of different sizes. Place the motor housing 200 onto the first detection mechanism 110, and the first detection mechanism 110 inserts into the second cavity 222 and conducts physical sealing. Inject detection gas into the first cavity 221. At this time, the flow path 210 communicating with the second cavity 222 is blocked and not accessible, and only the first cavity 221 itself is detected. Determine whether there is leakage and record the data. Remove the first detection mechanism 110, place the motor housing 200 onto the second detection mechanism 120, and the second detection mechanism 120 inserts into the first cavity 221 and conducts sealing. Inject gas to detect the second cavity 222 and its flow path 210 section. After the detection is completed, record and export the detection report.

[0080] In a specific embodiment, the air outlet 230 includes: a first air outlet 231 and a second air outlet 232 with openings facing away from each other along the length direction F1 of the motor housing, and a third air outlet 233 with an opening facing away from the connection hole 220 along the height direction F2 of the motor housing. The motor housing 200 further includes an air inlet hole 240 with an opening facing away from the flow path 210 along the width direction F3 of the motor housing. The first detection mechanism 110 includes a first cylinder assembly 10. The first cylinder assembly 10 includes: a first cylinder part 11, a second cylinder part 12, and a third cylinder part 13. The first cylinder part 11 moves along the length direction F1 of the motor housing to be in fit connection with the first air outlet 231. The second cylinder part 12 moves along the length direction F1 of the motor housing to be in fit connection with the second air outlet 232, and the motor housing 200 is located between the first cylinder part 11 and the second cylinder part 12. The third cylinder part 13 moves along the width direction F3 of the motor housing to the end close to the flow path 210 to be in fit connection with the air inlet hole 240.

[0081] Specifically, the first air outlet 231 and the second air outlet 232 are arranged at both ends of the motor housing along the length direction F1 and have opposite openings. And the third air outlet 233 is arranged along the height direction F2 of the motor housing. The distribution of the air outlets 230 not only covers the channel terminals of the motor housing 200 in different directions, but also effectively accommodates the exhaust requirements of different gas flow directions or gas accumulation areas in the flow path 210. In the seal detection, the injected gas needs to have a clear exhaust channel to analyze the pressure change and whether the gas flow is smooth. The air outlets 230 arranged in different directions of the length and height of the motor housing 200 can help cover a wider air flow path. In the automated detection, the installation direction of the motor housing 200 may be limited, and the diversified design of the orientations of the air outlets 230 can adjust the cooperation angle according to the test platform. Multiple air outlets can distribute the detection gas escape points. Once local leakage occurs, it can quickly guide the leaked gas to overflow through the nearest air outlet, so as to more quickly identify the problem area.

[0082] The multi-outlet path design is very suitable for the motor housing 200 with a complex structure and the motor runner 210 extending to different axial segments, such as the electric drive motor housing 200 for new energy vehicles, which has multiple functional modules such as built-in cooling and oil-gas separation, and must have an accurate air outlet organization method to complete effective detection.

[0083] The air inlet hole 240 is arranged at one end of the motor housing in the width direction F3 and faces away from the runner 210. During the detection process, the distribution of the air inlet and outlet determines the gas path. Setting the air inlet hole 240 opposite to the distribution direction of the runner 210 can prevent the gas from directly entering the end of the runner 210 through a short path, forcing it to pass through the complete channel system to achieve the full-path seal inspection. If the air inlet and outlet are arranged in the same direction or linearly opposite, the gas may form a short-circuit flow or local backflow, affecting the stability of the detection data. The back-to-back configuration makes the gas flow route have a good retention section and air pressure turning section, which is more conducive to amplifying abnormal signals. When the structure of the motor housing 200 is complex and the space is cramped, if the position of the air inlet hole 240 is close to the installation surface of the detection mechanism, the air path layout can be simplified, facilitating the fixture setting and automated docking operation. Therefore, this structural arrangement can effectively improve the test accuracy and detection coverage, and at the same time enhance the equipment structure adaptation ability, especially suitable for the motor housing 200 with an irregular structure or the motor housing 200 unit with a stepped layout.

[0084] The first cylinder assembly 10 is the motion execution unit of the detection mechanism, used to complete the precise docking with the air outlet hole 230. Two cylinder parts in the length direction can simultaneously block two opposite air outlet holes 230 to form a "closed pipe section" during the air injection detection, effectively controlling the test cavity range. The cylinder parts use linear sliding, servo precision control and other methods to achieve contact compression, which can adapt to different sizes and slightly deviated motor housings 200 to ensure the airtightness of the closed section. If multiple motor housings 200 are installed side by side for batch detection, the length-direction mobile structure is convenient for side-by-side synchronous movement, supporting the integration of the sliding table or gantry system in the automated production line.

[0085] The third cylinder part 13 moves along the width direction F3 of the motor housing, mainly used to physically contact and seal connect with the air inlet hole 240 to complete the injection of the test gas. Compared with sharing a cylinder or interface for the air injection port and the air outlet, the present invention realizes the air injection control in another direction by setting an independent third cylinder part 13, effectively preventing cross-contamination or path confusion. The three cylinder parts are distributed in the spatial direction as "length - length - width", and the movement paths are orthogonal to each other, and there will be no assembly difficulties or mechanism movement conflicts caused by structural interference. The third cylinder part 13 usually carries an air inlet joint and a sealing gasket, and after fitting the air inlet hole 240, the contact pressure can be maintained through a constant pressure controller to ensure no virtual leakage under high-pressure testing.

[0086] During the actuation process, the first cylinder member 11, the second cylinder member 12, and the second cylinder member 12 synchronously fit the corresponding air outlet holes 230 and air inlet ports. Subsequently, the gas valve is opened, and high-pressure gas is injected into the internal channel system of the motor housing 200. Then, the air outlet closed by the first and second cylinder members 12 is used to judge whether the flow and sealing states are qualified.

[0087] In a specific embodiment, the first detection mechanism 110 further includes a first fixing component 20. The first fixing component 20 moves along the height of the motor housing 200 in the direction close to the connection hole 220 and is fitted and connected to the motor housing 200.

[0088] Specifically, the first fixing component 20 is a structural member for realizing stable positioning and sealing fit. The movement path of the fixing component is to move along the height direction (i.e., the vertical or approximately vertical direction) of the motor housing 200, and the movement end point is to be close to the connection hole 220 and realize the fit and connection with the motor housing 200.

[0089] The movement of the first fixing component 20 in the length / width direction of the cylinder assembly constitutes a three-dimensional direction cooperation mechanism. The first fixing component 20 approaching the connection hole 220 indicates that the fixing structure is aligned with the entrance area of the detection cavity, accurately locking the measured part.

[0090] The first fixing component 20 is fitted and connected to the motor housing 200. It is not only a physical contact, but more emphasizes to achieve a stable connection through clamping, pressing, sealing, etc., to avoid displacement, gas leakage or vibration interference during the detection process.

[0091] In the seal detection, if there are small gaps, positioning deviations or external forces between the detection mechanism and the measured component, it may lead to test data errors or false leakage judgments. Therefore, a fixing structure component in the height direction is set. The purpose is to enhance the rigid positioning ability of the detection mechanism in space, and at the same time achieve effective sealing at the interface, providing a basic guarantee for establishing a sealed path for gas injection and blocking the test section.

[0092] Since the connection holes 220 on the motor housing 200 are often at different height positions in the vertical direction, only the contact in the horizontal direction (length or width) cannot provide stable positioning. The first fixing component 20 can achieve a mechanical constraint on the motor housing 200 "from top to bottom" or "from bottom to top" through the movement in the height direction, preventing the motor housing 200 from shifting during the detection process due to gravity, equipment vibration, etc. In the high-pressure seal test, if there are micro-gaps in the gas injection or blocking area, it will seriously affect the detection result. This fixing component can cooperate with structures such as O-rings, flexible gaskets or conical sealing surfaces to build a stable sealing surface at the edge of the connection hole 220, improve the pressure holding ability, and prevent gas leakage from interfering with the test result.

[0093] The first fixing component 20 is usually a pneumatic or electric actuator unit, and its moving stroke can be set through a PLC control system to achieve automatic lifting and positioning. It can accurately repeat actions in an automated test production line and is suitable for high-tempo and highly repetitive on-line detection processes.

[0094] The motor housing 200 is placed on the inspection table manually or by a manipulator to complete pre-alignment. The first inspection mechanism 110 moves to the target position, and its detection head is inserted into or attached to the second cavity 222. The first fixing component 20 is activated and moves downward in the vertical direction to press around the connection hole 220 or attach to the sealing area. After being attached in place, it is locked to form a stable support and sealing structure. The system is filled with test gas to perform a seal inspection. After the test is completed, the fixing component resets and lifts to release the motor housing 200.

[0095] In a specific embodiment, the flow channel 210 includes: a first main flow channel 211 and a second main flow channel 212 that are respectively at least connected to one second cavity 222, and a first branch flow channel 213 that connects the first cavity 221 and any one of the second main channels. The flow channel 210 further includes a second branch flow channel 214 that connects the external product 250 and the first cavity 221. The second main flow channel 212 is connected to the third air outlet 233. The first inspection mechanism 110 further includes a first air venting component 30. The first air venting component 30 is arranged along the height direction of the motor housing 200, and the motor housing 200 is fixedly connected to the first air venting component 30. The first air venting component 30 includes: a first fixing column 301, a first air inlet component 302, and a second plugging component 32. The first fixing column 301 and the first fixing component 20 clamp the motor housing 200 along the height direction of the motor housing 200. The first air inlet component 302 is used to introduce gas. The first plugging component 303 is inserted into the second cavity 222, and a first channel 304 is opened inside the first plugging component 303. And one first air inlet component 302 is connected to one first plugging component 303, one first plugging component 303 is connected to the first channel 304, and the first channel 304 is connected to one first cavity 221.

[0096] Specifically, the first main flow channel 211 is connected to at least one second cavity 222, and the second main flow channel 212 is connected to at least one second cavity 222, clearly indicating that each main flow channel 210 may serve different cooling paths, lubrication circuits, or gas channels. The first main flow channel 211 and the second main flow channel 212 are the main parts of the fluid, determining the flow direction and main distribution.

[0097] One end of the first branch flow channel 213 is connected to the first cavity 221, and the other end of the first branch flow channel 213 is connected to any one of the second main flow channels 212. The first branch flow channel 213 constitutes an intersection branch between the two main cavities and is used to achieve reflux detection.

[0098] One end of the second branch channel 214 communicates with the first cavity 221, and the other end of the second branch channel 214 communicates with the external product 250. The second branch channel 214 forms an external interface of the motor housing 200 for gas introduction or final pressure output evaluation.

[0099] The third air outlet 233 communicates with the second main channel 212. The third air outlet is designed to form an "end release" outlet, so that the detected gas can be reliably guided and discharged after passing through the complete path, forming a closed-loop path.

[0100] The function of the first ventilation component 30 is to provide a stable, sealed and clearly directed air intake path during the detection process. It is arranged in the height direction of the motor housing 200 (the vertical direction of the detection device) and is stably docked with the motor housing 200 through a fixed connection method. By being fixedly connected to the motor housing 200, the problems of position deviation or gas leakage of traditional methods such as hoses and floating air needles under high-pressure conditions are avoided, ensuring reliable test data.

[0101] The arrangement in the height direction is suitable for coordinated control with the upper cylinder and the automatic loading and unloading structure, and can quickly realize continuous actions such as "alignment - fitting - ventilation - loosening" in the assembly line or rotary detection equipment.

[0102] By adopting the ventilation component fixed in the height direction, the reliability problem of rapid access of high-pressure gas is solved, providing a good gas source basis for the subsequent channel detection process.

[0103] The fixed column and the fixed component can form a lifting control structure through a cylinder, a guide rail and an elastic connection mechanism, forming a symmetrical pressure during the clamping process to ensure the precise positioning of the motor housing 200 in three-dimensional space. Pressing the periphery of the ventilation area improves the sealing effect. When the fixed component presses the area of the connection hole 220, the fixed column provides a reaction force support to avoid local deformation of the motor housing 200 caused by unilateral loading and improve the fitting quality. At the same time, it can be linked with the control system to realize the integrated rhythm control of "clamping - ventilation - releasing", which is convenient to integrate it into the automatic detection equipment.

[0104] In traditional tests, the blocking device only serves as a sealing function and cannot simultaneously realize gas guiding. The first blocking member 303 has an internal channel, so that the blocking member simultaneously undertakes the dual functions of sealing and gas guiding, reducing the number of components and improving the space utilization rate.

[0105] Inserting a plug can effectively isolate the second cavity 222 and its subsequent flow channels 210, so as to accurately judge the sealing performance of the first cavity 221 under the state of only testing the first cavity 221, without being affected by other channels. The plug can be designed as a standardized interface part to adapt to different cavity apertures and depths, which is convenient for replacement and maintenance, and improves the flexibility level of the testing equipment. Through the first channel 304 communicating with the first cavity 221, gas can be pressurized only on the first cavity 221 when the second cavity 222 is closed, constructing a "sectional sealing area" to achieve accurate detection.

[0106] In a specific embodiment, gas is introduced step by step into the first cavity 221 corresponding to the second branch channel 214 of the air inlet part. The gas flows through the air inlet part, the channel, the first cavity 221, the second branch channel 214 and the external product 250. The external product 250 is provided with an air flow detection part to detect the sealing performance of the corresponding first cavity 221. Gas is introduced step by step into the second cavity 222 corresponding to the first branch channel 213 of the air inlet part. The air flow flows through the air inlet part, the channel, the first cavity 221, the first branch channel 213, the second main channel 212 communicating with the first branch channel 213, the third air outlet 233 communicating with the second main channel 212 and the external product 250. The external product 250 is provided with an air flow detection part to detect the sealing performance of the corresponding first cavity 221 and the connectivity of the first branch channel 213 and the second main channel 212.

[0107] Specifically, gas is introduced step by step to detect the first cavity 221 to the second branch channel 214 and the external product 250. The sealing integrity detection of one-way ventilation is realized. When there are multiple first cavities 221 in the second branch channel 214, the step-by-step ventilation method is used. However, when there are multiple second branch channels 214, gas can be introduced into one of the first cavities 221 of the multiple second branch channels 214.

[0108] The gas is directionally injected into the first cavity 221 through the air inlet assembly, so that it flows out along the established path: the channel, the first cavity 221, the second branch channel 214 and the external product 250, and the flow rate, pressure or flow velocity change is detected by the air flow detection part installed at the end of the external product 250, so as to judge whether there is leakage.

[0109] By taking the second branch channel 214 as the only ventilation outlet, interference from other branch channels and main channels 210 is avoided, so that the test object is concentrated on the first cavity 221 and the second branch channel 214, which is convenient for directional tracing of the leakage location.

[0110] If there is a micro-leakage in the first cavity 221, the gas cannot flow completely through the second branch channel 214 to the external detection part, and the detection system will generate alarm signals such as insufficient flow or pressure drop.

[0111] The second branch channel 214 is directly connected to the external product 250, forming an interface channel between the product and the motor housing 200. Therefore, the key point of this step is to verify whether a good seal is formed at the connection part after assembly to prevent systematic leakage at the product end. This passage is usually used as the first stage or pre-detection section of the detection process during operation to quickly screen for the risk of poor sealing in the initial assembly stage.

[0112] On the basis of confirming the qualification of the first cavity 221, further test the connectivity and sealing integrity between it and the second cavity 222, the first branch channel 213, the second main channel 212, and the third air outlet 233. Gas enters the second cavity 222 from the intake assembly, first enters the first cavity 221 through the channel, then flows to the second main channel 212 through the first branch channel 213, and finally is discharged from the third air outlet 233 and the external product 250. This combination of multiple-section channels forms a logical "series connection path", which can verify the functionality and sealing performance of multiple flow nodes together.

[0113] If there are problems such as blockage, misassembly, or abnormal welding inside the first branch channel 213, the gas will not be able to conduct smoothly from the intake end to the third air outlet 233, and the air flow detection component cannot detect the gas flow, so the structural abnormality can be judged accordingly. This path can also verify whether the first cavity 221 is correctly connected to the second main channel 212 and is not misconnected to other channels. This is particularly important in scenarios where the design structure of the motor housing 200 is complex and the channels are highly integrated. Through this distributed ventilation scheme, not only the sealing performance of the motor housing 200 is verified, but also the structural logic correctness and internal processing consistency are verified, significantly improving the detection accuracy and depth.

[0114] Compared with implementing detection at the end of the motor housing 200, performing flow or pressure tests from the external product 250 can be closer to the fluid working state after the whole machine is assembled, improving the practicality and representativeness of the detection. Through signal coordination with the external product 250, "remote determination" can be achieved to distinguish whether it is a problem with the internal channels of the motor housing 200 or a leakage at the assembly interface, improving the accuracy of fault analysis. External detection components can be standardized and deployed on test fixtures or assembly test benches, and after docking with the motor housing 200, a unified test process can be executed to meet the platform generalization requirements in large-scale detection scenarios.

[0115] The detection process is divided into two stages. The first stage test is the path of the second branch channel 214: The first detection mechanism 110 injects gas, and the gas enters the second branch channel 214 through the first cavity 221. The air flow reaches the detection component of the external product 250, and the flow data is collected. Judge whether the sealing performance of the first cavity 221 and the second branch channel 214 is qualified.

[0116] The second test is for the path from the first branch channel 213 to the third air outlet 233: Reset the detection path and inject gas into the second cavity 222. The gas flows through the first cavity 221 and successively into the first branch channel 213, the second main channel 212, and the third air outlet 233. The external product 250 collects flow or pressure signals to comprehensively judge the sealing performance and structural connectivity of the first cavity 221, the first branch channel 213, and the second main channel 212.

[0117] In a specific embodiment, the second detection mechanism 120 includes a second cylinder assembly 1, and the second cylinder assembly 1 includes a fourth cylinder member 14 and a fifth cylinder member 15. The fourth cylinder member 14 moves along the length direction F1 of the motor housing to insert into the first air outlet 231. The fifth cylinder member 15 moves along the length direction F1 of the motor housing to insert into the second air outlet 232, and the motor housing 200 is located between the first cylinder member 11 and the second cylinder member 12.

[0118] Specifically, corresponding to the first detection mechanism 110, the second detection mechanism 120 is mainly used to detect the flow channel 210 structure or the residual path segment related to the second cavity 222, especially for reverse control and supplementary detection of the detection path, or for positioning areas not covered in the first detection. The independent setting of the first detection mechanism 110 and the second detection mechanism 120 makes the detection device more flexible, capable of supporting dual-channel, dual-path, or dual-station detection modes, avoiding the concentration of multiple detection tasks on a single mechanism in terms of structure, and improving the response speed and structural redundancy of the overall system.

[0119] The fourth cylinder member 14 moves along the length direction of the motor housing 200 and finally inserts into the first air outlet 231. Different from the traditional fitting airtight test, this structure is an insertion-type sealing design, and the cylinder member inserts into the inner part of the air outlet of the motor housing 200, making the airtight connection more stable.

[0120] Since it is a structural embedding rather than attachment, misalignment or edge leakage is not likely to occur during air pressure loading, and it is suitable for airtightness pressure tests withstanding up to several hundred kilopascals. In the inserted state, the fourth cylinder member 14 can not only block the internal path but also set up an internal channel for reverse gas injection or air flow guidance to achieve a multi-functional test path.

[0121] The motor housing 200 is in a "long strip" shape in the structural design, and the terminals of multiple flow channels 210 are arranged at both ends in the length direction. The position arrangement of the fourth cylinder member 14 conforms to the natural arrangement of the structure, facilitating the configuration of platform fixtures.

[0122] The fifth cylinder member 15 is arranged in pairs with the fourth cylinder member 14, and is also moved along the length direction and inserted into the second air outlet 232 of the motor housing 200. This configuration realizes a double insertion sealing mechanism for the air outlets 230 at both ends of the motor housing 200, and its core function is to form a closed detection path section or to verify the path continuity.

[0123] On the premise that the two air outlet holes 230 are inserted into the sealing structure, air can be ventilated from the middle to monitor whether the airflow in two directions is unobstructed, which is suitable for path connectivity testing; compared with single-end blocking, double-end insertion can ensure that the path is leak-free within the entire normal range, and is suitable for verifying whether there are defects such as tiny cracks, punching holes, and welding pores in the pipeline.

[0124] The motor housing 200 is located between the fourth and fifth cylinder components 15 to construct a symmetrical clamping structure, thereby improving the stability of the test structure.

[0125] The motor housing 200 is arranged between the fourth cylinder member 14 and the fifth cylinder member 15 to form a closed path structure with opposite blocking. This structural setting is not only advantageous in path control, but also allows the two cylinder members to be extended oppositely and inserted into the two ends of the motor housing 200 before the detection operation to form a middle controlled area, and then the ventilation operation is performed to detect the sealing state in the closed section.

[0126] After the gas is injected, a closed section is formed. The sealing ends at both ends act in opposite directions, which can offset part of the gas impact force and prevent the equipment from positioning offset due to transient changes in air pressure. The clamping position of the motor housing 200 is in the center of the structure. Cylinder parts can be arranged on both sides and positioning sliders and limit guide rails can be installed. It is suitable for parallel operation of left and right lines on the beat-type automation platform.

[0127] In a specific embodiment, the first air outlet 231 and the second air outlet 232 are respectively communicated with the second main flow channel 212 .

[0128] The fourth cylinder part 14 and the fifth cylinder part 15 include a detection channel 141 and a detector 142. The detection channel 141 is connected to the first air outlet 231 or the second air outlet 232 to connect the second main flow channel 212 and the detection channel 141. The end of the detection channel 141 away from the second branch flow channel 214 is connected to the detector 142.

[0129] Specifically, the main channel 210 is used as the main channel for carrying gas or coolant circulation, and its leakage or blockage will cause systemic failure. Through the detection of both ends, the entire line segment of the main channel can be detected instead of local sampling, thereby improving the determination accuracy.

[0130] The symmetrical arrangement of the first air outlet 231 and the second air outlet 232 enables the system to have a two-way detection capability, that is, to select any end to inject gas and the other end to connect the detector 142, so as to adapt to the flexible configuration of the test process. Under high-pressure detection, the connection between the two ends can avoid the force concentration on one side of the cavity, maintain the overall force balance of the structure, and improve the structural reliability during the test process.

[0131] The detection channel 141 is a longitudinal hollow structure, which is connected to the second main channel 212 after being inserted into the air outlet 230, and can guide the gas to flow into the detection module from the internal channel of the motor housing 200, thereby realizing interference-free and non-blocking signal collection.

[0132] The detector 142 can be a flow meter, a pressure sensor or a pressure drop test device, which is used to capture the gas changes inside the channel in real time, so as to determine whether there is a small leak, channel blockage or abnormal connection. Since the detection channel 141 is integrated with the inserted cylinder structure, there is no need to manually plug and unplug the sensor or manually switch the interface, which is convenient for integration with the automated detection platform.

[0133] The detection channel 141 is led out from the second main channel 212, and the position where its outlet end is connected to the detector 142 is deliberately set on the side away from the second branch channel 214. This design logic establishes a one-way airflow path. In the sealing test, if the detection path is close to the gas injection path, it is very easy to cause problems such as airflow disturbance, air pressure fluctuation, backflow interference, etc. that affect the detection accuracy.

[0134] The detection channel 141 is connected to the first air outlet 231 or the second air outlet 232 to connect the second main channel 212 and the detection channel 141. The end of the detection channel 141 away from the second branch channel 214 is connected to the detector 142. The end of the detection path is kept away from the gas injection path to improve sampling stability. The gas reaches the sensor only after flowing through the entire detection path, which is conducive to judging the connectivity and damping state of the entire path rather than the instantaneous reaction of the local node, thereby improving the test accuracy.

[0135] In a specific embodiment, the second detection mechanism 120 includes a second fixing assembly 2. The second fixing assembly 2 includes a first fixing member 21 and a second fixing member 22. The first fixing member 21 moves in a direction close to the connecting hole 220 along the height of the motor housing 200, and the first fixing member 21 is inserted into the fourth air hole. The second fixing member 22 moves in a direction close to the connecting hole 220 along the height of the motor housing 200, and the second fixing member 22 is closely connected to the motor housing 200.

[0136] Specifically, the second fixing assembly 2 is a positioning structure of the second detection mechanism 120, which prevents the cylinder insertion force from causing micro-displacement of the motor housing 200 body during the detection process, thereby affecting the channel matching or sealing effect.

[0137] The first fixing member 21 is inserted into the fourth air hole in the height direction to achieve auxiliary plugging or limit positioning. The structural function of the first fixing member 21 lies not only in clamping the motor housing 200, but also in structural insertion, auxiliary plugging or passage control functions. The first fixing member 21 moves along the height direction F2 of the motor housing, and the target is to insert into the fourth air hole provided on the motor housing 200. The fourth air hole is usually a spare interface, ventilation hole, structural inspection hole or test through hole.

[0138] The structural function of the second fixing member 22 is to form a rigid fit or clamping connection between the motor housing 200 and the detection structure by moving in the height direction F2 of the motor housing. It is arranged in the area near the connection hole 220 on the surface of the motor housing 200. During the high-pressure ventilation process, in order to ensure that the interface seal of the motor housing 200 will not be lifted or loosened due to the reaction force, this fixing member needs to apply an opposite direction of adhesion force to form a complete support force loop. Since the interface of the motor housing 200 is often a thinner part, it is very easy to generate micro-vibration or jitter when inserting the detection mechanism. The second fixing member 22 closely adheres to the structure body, effectively enhancing the stability of the motor housing 200 area. The higher the external structure stability, the more reliable the flow rate, pressure and pressure drop data collected by the sensor. Especially during micro-leakage detection, the signal-to-noise ratio of the system can be effectively improved.

[0139] In a specific embodiment, the first main flow channel 211 is connected to the air inlet hole 240, and the air inlet hole 240 communicates with the first main flow channel 211. The second detection mechanism 120 includes a second ventilation component 3. The second ventilation component 3 is arranged along the height direction of the motor housing 200. The second ventilation component 3 and the second fixing component 2 relatively clamp the motor housing 200. The second ventilation component 3 includes a second fixing column 31, a second air inlet member 33 and a second plugging member 32. The second fixing column 31 and the second fixing member 22 relatively clamp the motor housing 200 along the height direction of the motor housing 200. The second air inlet member 33 is used to introduce gas. The second plugging member 32 is inserted into the first cavity 221, and a second channel 321 is opened inside the second plugging member 32. And one second air inlet member 33 communicates with one second plugging member 32, one second plugging member 32 communicates with the second channel 321, and the second channel 321 communicates with one second cavity 222.

[0140] Specifically, the first main flow channel 211 is directly connected to the air inlet hole 240 to form the front-end air supply port of the main detection path, and the detection gas can be directly introduced into the most critical main channel inside the motor housing 200 to construct a main path test closed loop. It is convenient to form a high-pressure gas injection section. As a large-section flow channel 210, the main flow channel 210 has strong pressure-bearing capacity and large volume, and is suitable as the pressure diffusion center of the overall structure.

[0141] After the first main runner 211 is connected to the air inlet hole 240, it forms a communication network with the first or second cavity 222 and the branch runner 210, so that after the test gas is injected, different sub-channel segments or loops can be selectively covered according to the test strategy.

[0142] The setting of the second ventilation component 3 enables the second detection mechanism 120 to independently complete the detection task corresponding to the passage of the second cavity 222. It is arranged along the height direction of the motor housing 200, which not only realizes the precise control of vertical insertion / fitting, but also is more adaptable to the layout of the stacked test platform in the vertical direction. It is especially suitable for the positioning requirements of the upper and lower clamping of the motor housing 200 in the batch detection line. Cooperating with the fixing component to achieve clamping stability and symmetric loading, this direction of arrangement is convenient for applying plugging pressure and reducing the poor sealing contact caused by tilting or lateral loading. And it is beneficial to signal wiring and gas source piping between components. The vertical setting has a regular structure, which is convenient for bundling and laying gas pipelines, sensing signal lines, and feedback devices, reducing the system complexity.

[0143] The second fixing column 31, as an element "oppositely configured" with the second fixing member 22, is located on one side of the second ventilation component 3, thus forming a typical upper and lower clamping system. During the detection process, especially during the insertion or ventilation stage, the motor housing 200 may move slightly due to the operating force or gas reaction force. The spatial position can be stabilized through bidirectional clamping, improving the detection consistency. The vertical clamping structure can guide the axis of the detection component to align with the axial direction of the channel of the motor housing 200, improving the fitting accuracy between the inserted part and the cavity and ensuring reliable sealing;

[0144] The second plugging member 32 has a plugging function and an internal gas channel function. After being connected to the second air inlet member 33, it forms a complete ventilation path to the second cavity 222. While the plugging member is inserted into the second cavity 222, other paths are physically blocked, and the internal channel still retains the ventilation ability.

[0145] In a specific embodiment, when the second main flow channel 212 is connected to the first main flow channel 211, gas is introduced into the air inlet hole 240. The gas flows through the air inlet hole 240, the first main flow channel 211, the second main flow channel 212 connected to the first main flow channel 211, the second cavity 222 connected to the first main flow channel 211, the second cavity 222 connected to the second main flow channel 212, the first air outlet hole 231 or the second air outlet hole 232 communicated with the second main flow channel 212, the detection channel 141 communicated with the corresponding air outlet hole 230, and the detector 142 to detect the sealing performance of the second cavity 222 and the connectivity of the first main flow channel 211 and the second main flow channel 212. When the second main flow channel 212 is not connected to the first main flow channel 211, gas is introduced into the second air inlet member 33. The gas flows through the second air inlet member 33, the second channel 321, the second cavity 222, the second main flow channel 212 connected to the second cavity 222, another second cavity 222 communicated with the second main flow channel 212, the first air outlet hole 231 or the second air outlet hole 232 communicated with the second main flow channel 212, the detection channel 141 communicated with the corresponding air outlet hole 230, and the detector 142.

[0146] Specifically, the detection path logic fully covers the first cavity 221, the second cavity 222, the two main flow channels 210, and the air outlet. After being injected through the air inlet hole 240, the gas flows into the first main flow channel 211 and the second main flow channel 212 in sequence, then branches into the second cavity 222 communicated therewith, and is discharged from the first or second air outlet hole 232.

[0147] If the path is completely connected and the second cavity 222 is well sealed, the detected value will be within the preset qualified range; otherwise, an alarm will be triggered.

[0148] The detection path realizes a ventilation operation that simultaneously covers the judgment of the connectivity of the main path and the verification of the sealing performance, reduces the operation steps, and improves the detection efficiency.

[0149] When the first and second main flow channels 212 are not in a connected state, that is, these two main paths are physically or functionally isolated channel segments, the detection strategy must be adjusted. The gas is injected through the second air inlet member 33 and directly enters the second cavity 222 through the second channel 321, avoiding the influence of the gas injection path of the main flow channel 210 and realizing stronger detection pertinence. If the gas can flow to another second cavity 222 and flow out from the air outlet, it indicates that the path is unobstructed; otherwise, there is a structural problem. It avoids the problem of being unable to detect in the "structural isolation" state and ensures that each independent flow path unit can be covered by the detection system.

[0150] The detection channel 141 and the detector 142 are connected to the end of the air outlet to form a feedback loop at the end of the test path, improving the accuracy of data response.

[0151] Only when the gas completely passes through the entire structural path from the intake end and finally reaches the detector 142 can the system determine that the path is completely connected and there is no leakage. When the detected value is a "weak signal", it can be preliminarily judged whether there is a slight resistance, residue blockage or internal leakage in the path, and the position can be further deduced based on the sampling rhythm and numerical offset.

[0152] Compared with the mid-section detection or intake-end sampling, the end detection can better reflect the actual flow state and pressure loss of the gas in the structure, and suppress interference and noise signals.

[0153] Therefore, the beneficial effects of the multi-channel seal detection device 100 for the motor housing provided above are as follows:

[0154] Through the step-by-step detection method, the first cavity 221, the second cavity 222 and the flow channel 210 can be detected specifically, avoiding the single-dimensional detection blind area that the conventional airtight detection can only determine whether there is leakage in the whole flow channel 210. The first detection mechanism 110 is inserted into the second cavity 222 and communicated with the first cavity 221, and is successively communicated with the external product 250 or the flow channel 210. After introducing gas, the airtightness of the first cavity 221 is mainly detected. For example, during the detection process, if there is a leak in the first cavity 221, the gas will flow out from the leak, resulting in a pressure drop or abnormal flow rate shown by the detection equipment, so as to accurately judge the airtightness of the first cavity 221. And, the second detection mechanism 120 is inserted into the first cavity 221 and communicated with the second cavity 222, and is successively communicated with the second cavity 222 and the flow channel 210. After introducing gas, not only the airtightness of the second cavity 222 is detected, but also the connectivity of the flow channel 210 can be detected. For example, if there is a leak in the second cavity 222, the detection data will be abnormal; if there is a partial blockage in the flow channel 210, such as a semi-blocked state caused by casting residual molding sand, the flow resistance of the gas in the flow channel 210 will increase, and by detecting the changes in parameters such as the flow rate and pressure of the gas, the connectivity problem of the flow channel 210 can be accurately identified.

[0155] The first detection mechanism 110 can detect the airtightness of multiple first cavities 221 in the same motor housing 200 and the connectivity of different flow channels 210 corresponding to the connected first cavities 221 through a detection device with multiple independent channels for detecting the first cavity 221.

[0156] The second detection mechanism 120 detects the airtightness of the second cavity 222 and the connectivity of the independent flow channel 210 by connecting the independent flow channel 210 of the second cavity 222. The independent flow channel 210 includes an air inlet and an air outlet.

[0157] The above are only the embodiments of the present application. It should be noted here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present application, but these all fall within the protection scope of the present application.

Claims

1. Motor housing multi-channel sealing detection device, the motor housing is provided with a flow channel, a connection hole communicating with the flow channel, and an air outlet hole communicating with the flow channel, the connection hole includes: A first cavity communicating with an external product or a runner, and a second cavity communicating with the first cavity and the runner, characterized in that the detection device includes a first detection mechanism and a second detection mechanism that are placed step by step and detect the motor housing; The first detection mechanism is inserted into the second cavity and communicates with the first cavity. The first detection mechanism is sequentially communicated with the first cavity, the external product or the runner. The first detection mechanism introduces gas to detect the airtightness of the first cavity and the connectivity of the runner; The second detection mechanism is inserted into the first cavity and communicates with the second cavity. The second detection mechanism is sequentially communicated with the second cavity and the runner. The second detection mechanism introduces gas to detect the airtightness of the second cavity and the connectivity of the runner.

2. The multi-channel seal detection device for the motor housing according to claim 1, wherein The air outlet holes include: A first air outlet hole and a second air outlet hole with openings facing away from each other along the length direction of the motor housing, and a third air outlet hole with an opening facing away from the connection hole along the height direction of the motor housing. The motor housing further includes an air inlet hole with an opening facing away from the runner along the width direction of the motor housing; The first detection mechanism includes a first cylinder assembly, and the first cylinder assembly includes: A first cylinder member that moves along the length direction of the motor housing to be in fit connection with the first air outlet hole; A second cylinder member that moves along the length direction of the motor housing to be in fit connection with the second air outlet hole. The motor housing is located between the first cylinder member and the second cylinder member; A third cylinder member that moves to the end close to the runner along the width direction of the motor housing to be in fit connection with the air inlet hole.

3. The multi-channel seal detection device for a motor housing according to claim 1, characterized in that, The first detection mechanism further includes a first fixing assembly that moves along the height of the motor housing in the direction close to the connection hole and is in fit connection with the motor housing.

4. The motor housing multi-channel sealing detection device according to claim 3, characterized in that The runner includes a first main runner and a second main runner that respectively communicate with at least one second cavity, and a first branch runner that communicates with the first cavity and any one of the second main channels. The runner further includes a second branch runner that communicates with the external product and the first cavity. The second main runner communicates with the third air outlet hole; The first detection mechanism further includes: A first air venting assembly arranged along the height direction of the motor housing. The motor housing is fixedly connected to the first air venting assembly. The first air venting assembly includes: A first fixing column that relatively clamps the motor housing with the first fixing assembly along the height direction of the motor housing; A first air inlet member for introducing gas; A first plug member that is inserted into the second cavity and has a first channel opened inside, and a first air inlet member communicates with a first plug member, a first plug member communicates with the first channel, and the first channel communicates with a first cavity.

5. The motor housing multi-channel seal detection device according to claim 4, characterized in that, Gas is introduced step by step into the first cavity where the air inlet member correspondingly communicates with the second branch runner. The gas flows through the air inlet member, the channel, the first cavity, the second branch runner and the external product. The external product is provided with an air flow detection member to detect the airtightness of the corresponding first cavity; Gas is introduced step by step into the second cavity where the air inlet member correspondingly communicates with the same first branch runner. The air flow flows through the air inlet member, the channel, the first cavity, the first branch runner, the second main runner communicated with the first branch runner, the third air outlet hole communicated with the second main runner and the external product. The external product is provided with an air flow detection member to detect the airtightness of the corresponding first cavity and the connectivity of the first branch runner and the second main runner.

6. The motor housing multi-channel seal detection device according to claim 2, characterized in that, The second detection mechanism includes a second cylinder assembly, and the second cylinder assembly includes: The fourth cylinder moves along the length direction of the motor housing until it is inserted into the first air outlet; The fifth cylinder part is moved along the length direction of the motor housing to be inserted into the second air outlet, and the motor housing is located between the first cylinder part and the second cylinder part.

7. The multi-channel seal detection device for a motor housing according to claim 6, characterized in that, The first air outlet and the second air outlet are respectively communicated with the second main flow channel; The fourth cylinder part and the fifth cylinder part include: a detection channel and a detection instrument; The detection channel is connected to the first air outlet or the second air outlet to connect the second main flow channel and the detection channel. One end of the detection channel away from the second branch flow channel is connected to a detector.

8. The multi-channel seal detection device for a motor housing according to claim 7, characterized in that, The second detection mechanism includes a second fixing component, and the second fixing component includes: The first fixing member moves along the direction of the motor housing height close to the connecting hole and is inserted into the fourth air hole; The second fixing member moves along the direction of the motor housing height approaching the connecting hole and is closely connected with the motor housing.

9. The multi-channel seal detection device for a motor housing according to claim 8, characterized in that The first main flow channel is connected to the air inlet hole, and the air inlet hole is connected to the first main flow channel. The second detection mechanism includes a second ventilation component, which is arranged along the height direction of the motor housing. The second ventilation component and the second fixing component relatively clamp the motor housing. The second ventilation component includes: The second fixing column and the second fixing member clamp the motor housing relatively along the height direction of the motor housing. A second gas inlet member, used for introducing gas; The second blocking member is inserted into the first cavity and has a second passage therein. A second air inlet member is connected to a second blocking member, a second blocking member is connected to a second passage, and the second passage is connected to a second cavity.

10. The motor housing multi-channel seal detection device according to claim 9, wherein, When the second main channel is connected to the first main channel, gas is introduced into the air inlet, and the gas flows through the air inlet, the first main channel, the second main channel connected to the first main channel, the second cavity connected to the first main channel, the second cavity connected to the second main channel, the first air outlet or the second air outlet connected to the second main channel, the detection channel connected to the corresponding air outlet, and the detector to detect the sealing of the second cavity and the connectivity between the first main channel and the second main channel; When the second main channel is not connected to the first main channel, gas is introduced into the second air inlet, and the gas flows through the second air inlet, the second channel, the second cavity, the second main channel connected to the second cavity, another second cavity connected to the second main channel, the first air outlet or the second air outlet connected to the second main channel, and the detection channel and detector connected to the corresponding air outlet.

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