Motor end cover air tightness rapid detection device and method

Abstract

The application relates to the technical field of detection structures, in particular to a motor end cover air tightness rapid detection device and method, which comprises oppositely distributed negative pressure storage units and positive pressure storage units, the negative pressure storage units are used for providing a negative pressure environment for one side of the motor end cover; the motor end cover is detected in the air tightness by adopting a positive-negative pressure difference mode, so that the requirement for a one-way pressure value is effectively reduced, time waste of needing long-time air extraction or air supply to form a specified pressure difference under the condition of external normal pressure in the traditional mode is avoided, the difficulty of forming the pressure difference and the requirement for equipment can be reduced, and detection convenience is improved; the negative pressure storage units and the positive pressure storage units can quickly provide positive-negative pressure environments for two sides of the motor end cover, so that time waste of air extraction or pressurized air supply is avoided, the motor end cover is quickly placed in a static detection stage, and air charging or air extraction does not need to start from normal pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of detection structures, and in particular to a device and method for quickly detecting the air tightness of a motor end cover. Background Art

[0002] The motor end cover is a key component of the motor housing, responsible for supporting the bearings, fixing the position of the stator and rotor, and sealing the internal structure. The airtightness of the motor end cover (i.e., the ability to prevent the intrusion of external gases, water vapor, dust, oil, etc. or the leakage of internal lubricants) is the basic guarantee for ensuring the long-term stable operation of the motor. Therefore, during the motor manufacturing process, strict, rapid and reliable testing of the airtightness of the end cover is a key step in ensuring the quality of the final motor product and improving its environmental adaptability and operational reliability.

[0003] The traditional detection method is to fix the end cover on the workbench, and then use a buckle cover or other structure to buckle it on the end cover, fill air between the buckle cover and the end cover until the air pressure reaches a predetermined value, maintain this state for a specified time, and detect whether the air pressure changes during this time period, thereby realizing the air tightness detection of the end cover. When using this detection method, gas filling is required in the initial stage of the detection to form a positive pressure. During the detection process, it is necessary to wait for a specified time. After the detection, the air is exhausted and the pressure is released. Therefore, a lot of time is wasted in each stage of the detection, and its work efficiency is low. In addition, when performing air tightness detection, the internal and external air pressure difference needs to reach a specified value, and the external air pressure is normal pressure, so the filling air pressure value needs to be higher, which results in a long time of gas filling to meet the predetermined requirements, and the time spent on gas filling is relatively long. Summary of the Invention

[0004] The present invention provides a device and method for quickly detecting the air tightness of a motor end cover, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A rapid air tightness detection device for a motor end cover comprises a negative pressure storage unit and a positive pressure storage unit that are relatively distributed. The negative pressure storage unit is used to provide a negative pressure environment for one side of the motor end cover, and the positive pressure storage unit is used to provide a positive pressure environment for the other side of the motor end cover. The negative pressure storage unit and the positive pressure storage unit are respectively connected to a plurality of buckle units and a plurality of lifting units. The corresponding buckle units and the lifting units constitute a structure for sealing and clamping both sides of the motor end cover.

[0007] Wherein, a pressure detection unit is provided on both the negative pressure storage unit and the positive pressure storage unit.

[0008] In some embodiments of the present application, the number of the pressing units and the number of the lifting units are both two.

[0009] The negative pressure storage unit comprises a negative pressure barrel, a sealing disc I located in the negative pressure barrel and capable of reciprocating along the axis of the negative pressure barrel, and two negative pressure pipes connected to both ends of the negative pressure barrel, the sealing disc I being used for plugging the negative pressure pipes, and the negative pressure pipes being communicated with the pressing units.

[0010] The positive pressure storage unit comprises a positive pressure barrel, a sealing disc II located in the positive pressure barrel and capable of reciprocating along the axis of the positive pressure barrel, and two positive pressure pipes connected to both ends of the positive pressure barrel, the sealing disc II being used for plugging the positive pressure pipes, and the positive pressure pipes being communicated with the lifting units.

[0011] In some embodiments of the present application, a pressure buffering unit is arranged between the negative pressure pipe and the negative pressure barrel, and the pressure buffering unit is used for increasing the pressure in the negative pressure pipe and the pressing units when the detection of the motor end cover is completed.

[0012] In some embodiments of the present application, the pressure buffering unit comprises a movable cylinder located at the end of the negative pressure barrel and slidingly inserted into the negative pressure barrel, a piston I slidingly arranged in the movable cylinder, the negative pressure pipe being connected with and communicated with the piston I, and the sealing disc I being used in cooperation with the movable cylinder.

[0013] The negative pressure pipe is relatively fixed with the negative pressure barrel, and a plurality of springs I are arranged on the negative pressure pipe and used for providing elastic force to the movable cylinder.

[0014] In some embodiments of the present application, a sealing ring is arranged on the sealing disc I, the inside of the sealing ring has a deformation air chamber, the cross-sectional shape of the sealing ring is arc-shaped, the inner wall of the arc-shaped sealing ring is arranged as a conical surface, and a plurality of extrusion edges extending outward are arranged on the conical surface.

[0015] In some embodiments of the present application, a pressure releasing unit is arranged between the positive pressure pipe and the positive pressure barrel, and the pressure releasing unit is used for transferring the positive pressure in the positive pressure pipe to the negative pressure pipe after the detection of the motor end cover is completed.

[0016] In some embodiments of the present application, the pressure releasing unit comprises a pipe inserted into the positive pressure pipe and slidingly arranged in the positive pressure barrel, and a fixed pipe communicated with and installed on the end face of the positive pressure barrel, the end of the pipe is provided with a connecting disc, a plurality of springs II are arranged between the connecting disc and the positive pressure barrel, the sealing disc II is used in cooperation with the connecting disc, a sub-pipe is communicated and arranged on the pipe, the sub-pipe has a sealing pipe parallel to the moving direction of the pipe, and a gas hole I is arranged on the sealing pipe.

[0017] Among them, the sealing tube is slidably inserted into the fixed tube, and an air guide tube is provided on the side wall of the fixed tube. The air guide tube is connected to the corresponding negative pressure tube. When the cannula moves, the outer wall of the sealing tube blocks the air guide tube or the air hole 1 is connected to the air guide tube.

[0018] In some embodiments of the present invention, the buckle unit includes a buckle cover body, a connecting plate provided on the buckle cover body, a plurality of oil cylinders for providing moving power for the connecting plate, a thin tube installed on the connecting plate and inserted into the buckle cover body, and a plurality of air holes provided on the side wall of the thin tube and used to communicate with the buckle cover body. The thin tube is slidably inserted into the corresponding negative pressure tube.

[0019] The lifting unit includes a supporting bucket and an air guide chamber opened in the supporting bucket, the positive pressure tube is inserted into the air guide chamber, and a plurality of air holes three for communicating with the air guide chamber are opened on the side wall of the positive pressure tube.

[0020] In some embodiments of the present invention, the buckle unit further includes a first docking tube fixed relatively to the buckle cover body, a second piston slidingly located in the first docking tube, and a pressure gauge mounted on the second piston, the second piston being connected to the thin tube, the connecting plate being connected to the buckle cover body via a plurality of third springs, the thin tube sliding relatively to the buckle cover body, and the first docking tube being used to dock with one side of the center hole of the motor end cover;

[0021] The lifting unit also includes a docking tube 2 and a support plate relatively fixed in the supporting bucket. The docking tube 2 is used to dock with the other side of the center hole of the motor end cover. A piston 3 is provided at the end of the positive pressure tube in the air guide chamber. When the piston 3 is located on the outside of the docking tube 2, the gap between the piston 3 and the docking tube 2 is used to allow positive pressure gas to enter the docking tube 2. When the piston 3 is located on the inside of the docking tube 2, the piston 3 is used to seal the docking tube 2. The support plate and the supporting bucket are connected by a number of springs 4.

[0022] A method for quickly detecting the air tightness of a motor end cover, using the above-mentioned device for quickly detecting the air tightness of a motor end cover, comprises the following steps:

[0023] Place the two motor end covers on the two lifting units and use the two pressing units to squeeze and fix the motor end covers;

[0024] Both closing plate 1 and closing plate 2 are in idle position;

[0025] Make the negative pressure storage unit have a negative pressure environment, the positive pressure storage unit have a positive pressure environment, the pressure between the buckle unit and the motor end cover is negative, and the pressure between the lifting unit and the motor end cover is positive;

[0026] Move the sealing disc 1 and the sealing disc 2 to one side of the corresponding negative pressure storage unit and the positive pressure storage unit, so that the negative pressure storage unit and the positive pressure storage unit only detect one motor end cover, while the other motor end cover is in a waiting state;

[0027] Use the pressure detection unit to detect whether the internal pressure of the negative pressure storage unit and the positive pressure storage unit changes, so as to determine whether the air tightness of the motor end cover meets the standard;

[0028] When one motor end cover has completed the inspection, the sealing disc 1 and the sealing disc 2 are moved to the other side of the corresponding negative pressure storage unit and positive pressure storage unit to inspect the other motor end cover;

[0029] Remove the motor end cover that has been inspected and replace it with a new one;

[0030] The reciprocating motion of the sealing disc 1 and the sealing disc 2 in the corresponding negative pressure storage unit and the positive pressure storage unit is utilized to realize the continuous detection of the motor end cover.

[0031] The technical solution of the present invention can achieve the following technical effects:

[0032] By adopting the positive and negative pressure difference method to test the air tightness of the motor end cover, the requirement for the one-way pressure value is effectively reduced, and the time waste of long-time air extraction or air supply to form the specified pressure difference based on the external normal pressure condition in the traditional method is avoided. At the same time, the difficulty of forming the pressure difference and the requirements for equipment can be reduced, and the convenience of detection is improved; by using the negative pressure storage unit and the positive pressure storage unit, positive and negative pressure environments can be quickly provided for both sides of the motor end cover, thereby avoiding the time waste of air extraction or pressurized air supply, and the motor end cover is quickly placed in the static detection stage without the need to start inflation or extraction from normal pressure; by using the method of alternating detection of several motor end covers, it is convenient to replace other motor end covers when the motor end cover is detected, so that time is fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 is a structural schematic diagram of a negative pressure storage unit in an embodiment of the present invention;

[0036] Figure 3 is a schematic cross-sectional structural diagram of a negative pressure storage unit in an embodiment of the present invention;

[0037] Figure 4 is a schematic cross-sectional structural diagram of a positive pressure storage unit in an embodiment of the present invention;

[0038] Figure 5 This is a schematic structural diagram of a closing disk 1 according to an embodiment of the present invention;

[0039] Figure 6 yes Figure 4 A schematic diagram of the partially enlarged structure at center A;

[0040] Figure 7 Schematic diagram of the exploded structure of the motor end cover, buckle unit and lifting unit in an embodiment of the present invention;

[0041] Figure 8 is a schematic cross-sectional structural diagram of a buckle unit in an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the cross-sectional structure of the motor end cover in an embodiment of the present invention;

[0043] Figure 10 It is a schematic diagram of the cross-sectional structure of the lifting unit in an embodiment of the present invention.

[0044] Reference numerals:

[0045] 100. Motor end cover;

[0046] 200, negative pressure storage unit; 201, negative pressure barrel; 202, negative pressure tube; 203, sealing disk 1; 204, movable cylinder; 205, piston 1; 206, fixed plate; 207, spring 1; 208, rib; 209, supporting roller; 210, sealing ring; 211, deformation chamber; 212, conical surface; 213, extrusion edge;

[0047] 300, positive pressure storage unit; 301, positive pressure barrel; 302, positive pressure tube; 303, sealing disk 2; 304, intubation tube; 305, connecting disk; 306, spring 2; 307, auxiliary tube; 308, sealing tube; 309, air hole 1; 310, fixing tube; 311, air guide tube;

[0048] 400, buckle unit; 401, buckle cover; 402, connecting plate; 403, oil cylinder; 404, capillary tube; 405, air hole 2; 406, spring 3; 407, docking sleeve 1; 408, piston 2; 409, pressure gauge;

[0049] 500, lifting unit; 501, supporting bucket; 502, air guide chamber; 503, air hole 3; 504, docking sleeve 2; 505, piston 3; 506, support plate; 507, spring 4;

[0050] 600, air pump; 601, three-way pipe; 602, pressure regulating valve. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be apparently and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the singular forms“a,”“an,” and“the” include plural references unless the context clearly dictates otherwise.

[0053] As Figure 1 As shown in the drawings, the motor end cover air tightness rapid detection device of the present application comprises oppositely arranged pressing buckle units 400 and lifting units 500, the pressing buckle units 400 and the lifting units 500 are respectively connected with negative pressure storage units 200 and positive pressure storage units 300, the negative pressure storage units 200 cooperate with the pressing buckle units 400 to provide a negative pressure environment for one side of the motor end cover 100, the positive pressure storage units 300 cooperate with the lifting units 500 to provide a positive pressure environment for the other side of the motor end cover 100, and the negative pressure storage units 200 and the positive pressure storage units 300 are both provided with pressure detection units.

[0054] In the present application, the pressing buckle units 400 and the lifting units 500 are one-to-one corresponding and can form a plurality of sealing clamping structures, the sealing clamping structures can simultaneously clamp and fix a plurality of motor end covers 100; the negative pressure storage units 200 can provide negative pressure supply for the pressing buckle units 400, thereby forming a negative pressure environment on one side of the motor end cover 100, and the positive pressure storage units 300 can provide positive pressure supply for the lifting units 500, thereby forming a positive pressure environment on the other side of the motor end cover 100, that is, the two sides of the motor end cover 100 utilize the positive and negative pressures to generate a large pressure difference; since the pressing buckle units 400 and the lifting units 500 can simultaneously clamp a plurality of motor end covers 100, a plurality of motor end covers 100 can be simultaneously detected, and in order to accurately determine the sealing property of each motor end cover 100, a pressure detection unit needs to be configured for each sealing clamping structure.

[0055] When in use, several motor end covers 100 are placed between several pressing units 400 and their corresponding lifting units 500, and the pressing units 400 and the lifting units 500 are used to seal and clamp the motor end covers 100. Since the pressing units 400 and the lifting units 500 are connected to the negative pressure storage unit 200 and the positive pressure storage unit 300 respectively, the negative pressure storage unit 200 and the positive pressure storage unit 300 can be used to directly provide negative pressure and positive pressure for both sides of the motor end cover 100, respectively. In this way, positive and negative pressure environments can be quickly formed on both sides of the motor end cover 100, avoiding the need for air extraction and air supply operations, so that the pressure environment is quickly formed. At the same time, the positive and negative pressures on both sides of the motor end cover 100 can be used to make the air pressure The difference quickly reaches the specified requirements, avoiding the need to make the positive pressure or negative pressure reach a higher level before the detection is carried out when the detection work is based on normal pressure conditions, thereby reducing the detection requirements; the negative pressure storage unit 200 and the positive pressure storage unit 300 only detect one motor end cover 100 at the same time, and the other motor end covers 100 are in the process of being replaced. In this way, only the pressure detection units on the negative pressure storage unit 200 and the positive pressure storage unit 300 need to be used to realize the detection work of all motor end covers 100, that is, the pressure detection unit can be shared, and the waiting time when the motor end cover 100 is detected can be used to replace other motor end covers 100 that have completed the detection, which can make full use of time.

[0056] It should be pointed out that since the negative pressure storage unit 200 and the positive pressure storage unit 300 provide corresponding air pressure environments to the pressing unit 400 and the lifting unit 500 respectively, in order to avoid air leakage of the pressing unit 400 and the lifting unit 500, sealing strips can be installed on the pressing unit 400 and the lifting unit 500, and a switch structure is set on each pressing unit 400 and each lifting unit 500 to open the switch structure during detection and close the switch structure after the detection is completed.

[0057] By adopting the positive and negative pressure difference method to test the air tightness of the motor end cover 100, the requirement for the one-way pressure value is effectively reduced, and the time waste of long-term air extraction or air supply to form a specified pressure difference based on external normal pressure conditions in the traditional method is avoided. At the same time, the difficulty of forming the pressure difference and the requirements for equipment can be reduced, and the convenience of detection is improved; by using the negative pressure storage unit 200 and the positive pressure storage unit 300, positive and negative pressure environments can be quickly provided for both sides of the motor end cover 100, thereby avoiding the time waste of air extraction or pressurized air supply, and the motor end cover 100 is quickly placed in a static detection stage without the need to start inflation or extraction from normal pressure; by using a method of alternating detection of several motor end covers 100, it is convenient to replace other motor end covers 100 when the motor end cover 100 is detected, thereby making full use of time; due to the use of positive and negative pressure detection methods, the sealing requirements of positive and negative pressure relative to normal pressure are reduced.

[0058] Optimized on the above implementation, such as Figures 1 to 4 As shown,

[0059] The negative pressure storage unit 200 includes a negative pressure barrel 201, a negative pressure tube 202, and a sealing disk 203. The negative pressure tubes 202 are disposed at opposite ends of the negative pressure barrel 201 and connect to two buckle units 400, respectively. The sealing disk 203 is disposed within the negative pressure barrel 201 and can reciprocate along its axis to seal the two negative pressure tubes 202.

[0060] The positive pressure storage unit 300 includes a positive pressure barrel 301, a positive pressure pipe 302, and a second sealing disk 303. The positive pressure pipes 302 are disposed at opposite ends of the positive pressure barrel 301 and connect to the two lifting units 500. The second sealing disk 303 is disposed within the positive pressure barrel 301 and can reciprocate along its axis to seal the two positive pressure pipes 302.

[0061] By setting up a negative pressure barrel 201 and a positive pressure barrel 301, negative pressure and positive pressure can be stored, thereby conveniently providing a negative pressure environment and a positive pressure environment for the pressing unit 400 and the lifting unit 500; the number of the pressing unit 400 and the lifting unit 500 is set to two, which can achieve the working effect of alternating detection of the two motor end covers 100. In this way, at the same time, the negative pressure storage unit 200 and the positive pressure storage unit 300 only need to provide a pressure environment for one motor end cover 100, and the other motor end cover 100 is in a replacement state. The pressure detection unit only needs to detect the pressure of the negative pressure storage unit 200 or the positive pressure storage unit 300, without the need to perform internal pressure detection on each pressing unit 400 and the lifting unit 500.

[0062] In actual use, since the detection waiting time is close to the time required for replacing the motor end cover 100, the method of alternately detecting the two motor end covers 100 can make full use of time and improve the continuity of the detection work; the negative pressure storage unit 200 stores negative pressure inside, and the positive pressure storage unit 300 stores positive pressure inside. When the motor end cover 100 is replaced, the sealing disk 1 203 and the sealing disk 2 303 contact and seal the corresponding negative pressure tube 202 and positive pressure tube 302. At this time, the corresponding pressing unit 400 and the lifting unit 500 can be smoothly separated from the motor end cover 100 and the new motor end cover 100 is placed in the pressing unit 4 00 and the lifting unit 500, the internal air pressure of the negative pressure storage unit 200 and the positive pressure storage unit 300 will not leak. When the other motor end cover 100 completes the inspection, the sealing disk 1 203 and the sealing disk 2 303 move and seal the other negative pressure tube 202 and the positive pressure tube 302. At this time, the buckle unit 400 and the lifting unit 500 on the replaced motor end cover 100 are connected to the negative pressure storage unit 200 and the positive pressure storage unit 300 and start the inspection work, thereby realizing the continuous inspection function through the alternating inspection of the two motor end covers 100 and the reciprocating movement of the sealing disk 1 203 and the sealing disk 2 303.

[0063] It should be noted that the movement of the closing disk 1 203 or the closing disk 2 303 can be achieved by a structure such as a linear module.

[0064] Since there is negative pressure or positive pressure inside the sealing disk 1 203 and the sealing disk 2 303, when the motor end cover 100 is replaced, the negative pressure and positive pressure inside the sealing disk 1 203 and the sealing disk 2 303 will leak. After a long time, the negative pressure and positive pressure inside the negative pressure storage unit 200 and the positive pressure storage unit 300 will gradually tend to normal pressure. In order to ensure that the positive and negative pressure environments inside the negative pressure storage unit 200 and the positive pressure storage unit 300 are stable for a long time, the following method can be used: Figure 1In the manner shown, an air pump 600 is provided between the negative pressure storage unit 200 and the positive pressure storage unit 300, and a three-way pipe 601 is provided at both the input and output ends of the air pump 600. One input end of the three-way pipe 601 at the input end of the air pump 600 is connected to the negative pressure storage unit 200, and the other input end of the three-way pipe 601 is provided with a pressure regulating valve 602. One output end of the three-way pipe 601 at the output end of the air pump 600 is connected to the positive pressure storage unit 300, and the other output end of the three-way pipe 601 is provided with a pressure regulating valve 602 of the same structure, thereby utilizing the air pump 600 and the two three-way pipes 601 to draw air from the negative pressure storage unit 200 into the positive pressure storage unit. 300, so that the inside of the negative pressure storage unit 200 always maintains a negative pressure, and the inside of the positive pressure storage unit 300 always maintains a positive pressure. When the negative pressure inside the negative pressure storage unit 200 reaches the specified value, and the pressure inside the positive pressure storage unit 300 has not yet reached the specified value, the pressure regulating valve 602 on the input end of the air pump 600 will allow external air to be replenished until the internal pressure of the positive pressure storage unit 300 reaches the specified value. Conversely, when the internal pressure of the negative pressure storage unit 200 has not reached the specified value, and the internal pressure of the positive pressure storage unit 300 has reached the specified value, the air pump 600 continues to run and discharges excess air through the pressure regulating valve 602 on the output end of the air pump 600.

[0065] Optimized in the above implementation, the negative pressure tube 202 is connected to the negative pressure barrel 201 through a pressure relief unit, and the pressure relief unit includes a movable cylinder 204 located at the end of the negative pressure barrel 201 and slidingly inserted into the negative pressure barrel 201, and a piston 205 is slidingly arranged in the movable cylinder 204, the negative pressure tube 202 is fixedly connected to the piston 205, and the sealing disk 203 is used in conjunction with the movable cylinder 204; because the sealing disk 203 is blocking the negative pressure tube 202, the inside of the negative pressure tube 202 is still in a negative pressure state, at this time the buckle unit 400 and the motor end cover 100 will adsorb each other, thereby hindering the disassembly of the motor end cover 100, and the pressure relief unit can be used to increase the internal pressure of the negative pressure tube 202, thereby reducing the difficulty of disassembling the motor end cover 100; in some embodiments, the pressure relief unit can be a pressure relief tube and a pressure relief valve arranged on the negative pressure tube 202, but this requires separate control for the opening and closing of the pressure relief valve.

[0066] Based on the above implementation, Figure 3 As shown, the negative pressure tube 202 is fixedly connected to the negative pressure barrel 201 through a fixed plate 206 , and a plurality of springs 207 for providing elastic force to the movable cylinder 204 are provided on the fixed plate 206 .

[0067] The negative pressure tube 202 can be fixed on the negative pressure barrel 201 through the fixing plate 206, so that the piston 1 205 can be fixed relatively to the negative pressure barrel 201. When the movable cylinder 204 moves, the piston 1 205 will move relative to the movable cylinder 204, and the internal space of the movable cylinder 204 will change. One end of the spring 1 207 is set on the fixing plate 206, and the other end is connected to the movable cylinder 204. The spring 1 207 can provide a reset elastic force for the movable cylinder 204 to prevent it from moving at will. Since the movable cylinder 204 is only supported and guided by the piston 1 205 and the sealing ring 210, in order to improve In order to ensure the smooth movement and support strength of the movable cylinder 204, a plurality of supporting wheels 209 can be set inside the movable cylinder 204 outside the negative pressure barrel 201. The supporting wheels 209 are in rolling contact with the movable cylinder 204. The supporting wheels 209 are set on the negative pressure tube 202. The plurality of supporting wheels 209 can be used to provide auxiliary support for the movable cylinder 204. At the same time, in order to limit the moving position of the movable cylinder 204, a retaining edge 208 can be set at the end of the movable cylinder 204 outside the negative pressure barrel 201. The retaining edge 208 is in contact with the supporting wheel 209 to limit the movable cylinder 204. The shape of the retaining edge 208 can be set as follows: Figure 3 The arc shown.

[0068] When the motor end cover 100 completes the inspection, the sealing disk 1 203 moves toward the direction of the corresponding negative pressure tube 202, and the sealing disk 1 203 abuts against the movable cylinder 204 and blocks the movable cylinder 204. At this time, the negative pressure barrel 201 and the movable cylinder 204 are isolated from each other, and the sealing disk 1 203 moves and pushes the movable cylinder 204 to move synchronously. The piston 1 205 is stationary, and the internal space of the movable cylinder 204 is reduced. Since the negative pressure tube 202 is connected to the inside of the movable cylinder 204, the pressure inside the movable cylinder 204 and the negative pressure tube 202 will increase accordingly, thereby reducing the pressure between the buckle unit 400 and the motor by reducing the space. The adsorption force between the end covers 100 facilitates the disassembly of the motor end cover 100; when the motor end cover 100 is replaced and the buckle unit 400 is buckled on the motor end cover 100, the sealing disk 203 moves in the opposite direction. At this time, the movable cylinder 204 is pushed by the spring 207 to move, and the internal space of the movable cylinder 204 increases, thereby reducing the internal air pressure of the negative pressure tube 202 and the buckle unit 400, thereby achieving pre-adsorption treatment of the motor end cover 100, and facilitating the reduction of the pressure difference between the movable cylinder 204 and the negative pressure barrel 201, so that the sealing disk 203 can be smoothly separated from the movable cylinder 204.

[0069] In order to improve the sealing between the sealing disk 203 and the movable cylinder 204, Figure 5 As shown,

[0070] A sealing ring 210 is provided on both sides of the closing disk 203 corresponding to the two movable cylinders 204. The sealing ring 210 has a deformable air chamber 211 inside. The cross-section of the sealing ring 210 is arched and an annular groove is formed on the side facing the movable cylinder 204. The bottom size of the annular groove is adapted to the end face size of the movable cylinder 204 and gradually expands toward the groove opening. The inner ring and outer ring inner walls of the annular groove are both set to a conical surface 212, and the conical surface 212 has a number of extrusion ridges 213 extending outward.

[0071] The setting of the sealing ring 210 can enhance the sealing between the closing disk 203 and the end of the movable cylinder 204, thereby avoiding gas leakage; since the closing disk 203 is used in conjunction with the end of the movable cylinder 204, the cross-sectional shape of the sealing ring 210 can be set to a bow shape, so that the sealing ring 210 can be buckled onto the end of the movable cylinder 204, thereby improving the sealing; by setting a deformable air chamber 211 in the sealing ring 210, and setting the inner wall of the bow as a conical surface 212, when the end of the movable cylinder 204 is inserted into the sealing ring 210 and squeezed, the middle part of the deformable air chamber 211 will be compressed and its two sides will expand, thereby pushing the conical surface 212 to adhere to the outer wall of the movable cylinder 204, thereby realizing a fully wrapped sealing method for the end of the movable cylinder 204, and then using the setting of several extrusion ridges 213 to further improve the sealing in the wrapped state.

[0072] Since the positive pressure tube 302 is under positive pressure, if the positive pressure tube 302 is directly disassembled when the motor end cover 100 completes the inspection, the pressure will be released instantly, thereby causing damage to workers or equipment. To avoid this phenomenon, a pressure relief unit is provided between the positive pressure tube 302 and the positive pressure barrel 301 through a pressure relief unit. The positive pressure tube 302 is also connected to the negative pressure tube 202 through the pressure relief unit. The pressure relief unit is used to transfer the positive pressure in the positive pressure tube 302 to the corresponding negative pressure tube 202 after the motor end cover 100 completes the inspection; the pressure relief unit can be used to transfer the excess pressure in the positive pressure tube 302 to the negative pressure tube 202, thereby making the negative pressure tube 202 and the positive pressure tube 302 both at normal pressure or low positive pressure, reducing the danger and difficulty of disassembly of the motor end cover 100.

[0073] Based on the above implementation, Figure 6 As shown,

[0074] The pressure relief unit includes an intubation tube 304 located in the positive pressure barrel 301 and slidably inserted into the positive pressure tube 302, and a fixed tube 310 connected and installed on the end face of the positive pressure barrel 301, and a sealing tube 308 slidably inserted into the fixed tube 310. The intubation tube 304 is connected to the sealing tube 308 through a secondary tube 307; the fixed tube 310 is connected to the negative pressure tube 202 through an air guide tube 311, and an air hole 309 is provided on the sealing tube 308. The sealing tube 308 can block the air guide tube 311 through its outer wall or be connected to the air guide tube 311 through the air hole 309; a connecting disk 305 is provided at the end of the intubation tube 304, and a plurality of springs 306 are provided between the connecting disk 305 and the positive pressure barrel 301, and the sealing disk 303 is used in conjunction with the connecting disk 305.

[0075] In the present invention, spring 2 306 is used to limit the position of connecting disk 305 and cannula 304 to prevent them from moving at will; the outer wall of sealing tube 308 has the function of blocking air duct 311; in the natural state, air hole 1 309 deviates from air duct 311, and sealing tube 308 blocks air duct 311. When the motor end cover 100 completes the detection, sealing disk 2 303 moves and abuts against connecting disk 305. At this time, sealing disk 2 303 pushes connecting disk 305 and cannula 304 to move synchronously, thereby moving auxiliary tube 307, and positive pressure barrel 301 and cannula 304 are isolated from each other. When the air hole 1 309 on the sealing tube 308 moves to the position of the air guide tube 311, the air hole 1 309 is connected to the air guide tube 311, and the air inside the positive pressure tube 302 will be transmitted to the air guide tube 311 through the intubation 304, the auxiliary tube 307 and the air hole 1 309, so that the positive pressure in the sealing disk 2 303 is transmitted to the negative pressure tube 202 by the air guide tube 311 to achieve pressure balance. When the motor end cover 100 is replaced, the sealing disk 2 303 moves in the opposite direction. At this time, the spring 2 306 will push the connecting disk 305 and the intubation tube 304 to move, and the air hole 1 309 and the air guide tube 311 will deviate from each other again.

[0076] In some embodiments of the present invention, the buckle unit 400 includes a buckle cover body 401 and a connecting plate 402 arranged thereon, and an oil cylinder 403 and a capillary tube 404 are provided on the connecting plate 402. The connecting plate 402 is driven by the oil cylinder 403 and drives the buckle cover body 401 to move. One end of the capillary tube 404 is slidably inserted into the negative pressure tube 202, and the other end is inserted into the buckle cover body 401. A plurality of air holes 405 for communicating with the buckle cover body 401 are provided on the side wall of the capillary tube 404; the lifting unit 500 is provided on the support plate 506, and includes a bucket 501 and an air guide chamber 502 provided in the bucket 501. The positive pressure tube 302 is slidably inserted into the air guide chamber 502, and a plurality of air holes 503 for communicating with the air guide chamber 502 are provided on the side wall of the positive pressure tube 302.

[0077] like Figures 7 to 10As shown, the oil cylinder 403 is relatively fixed to the negative pressure barrel 201, and the oil cylinder 403 can provide power for the movement of the buckle cover body 401 and the connecting plate 402, thereby enabling the buckle cover body 401 and the thin tube 404 to move, and the buckle cover body 401 is used to buckle on the motor end cover 100 so that a negative pressure detection space is formed between the buckle cover body 401 and the motor end cover 100, and the negative pressure detection space can be connected with the negative pressure tube 202 through the second air hole 405 and the thin tube 404, and the negative pressure in the negative pressure barrel 201 can be transmitted to the negative pressure detection space; due to the active movement of the buckle cover body 401, the distance between the buckle cover body 401 and the negative pressure tube 202 will change, and in order to enable them to be connected, it is necessary to use a structural method in which the thin tube 404 and the negative pressure tube 202 are interpenetrated and connected with each other;

[0078] The support bucket 501 is buckled on the other side of the motor end cover 100, and a positive pressure detection space can be formed therebetween. The positive pressure in the positive pressure tube 302 can be transmitted to the air guide chamber 502 and the positive pressure detection space through the air hole three 503, thereby using the positive pressure to detect the motor end cover 100.

[0079] Based on the above implementation, Figure 9 As shown, since the motor end cover 100 has a central hole in the middle, the central hole needs to be independently detected, such as Figures 8 to 10 As shown, the buckle unit 400 also includes a docking sleeve 407 relatively fixed in the buckle cover body 401, a piston 408 slidingly located in the docking sleeve 407, and a pressure gauge 409 installed on the piston 408. The piston 408 is connected to the capillary tube 404, and the connecting plate 402 is connected to the buckle cover body 401 through a plurality of springs 406. The capillary tube 404 slides relative to the buckle cover body 401, and the docking sleeve 407 is used to dock with one side of the center hole of the motor end cover 100.

[0080] The lifting unit 500 also includes a docking tube 2 504 relatively fixed in the support bucket 501, and a piston 3 505 is provided at one end of the positive pressure tube 302 located in the air guide chamber 502. The piston 3 505 is arranged corresponding to the docking tube 2 504 and can slide along its axial direction. The docking tube 2 504 is used to dock with the other side of the center hole of the motor end cover 100. The support plate 506 and the support bucket 501 are connected by a number of springs 4 507.

[0081] In the present invention, the docking sleeve 1 407 and the piston 3 505 can be docked with the two sides of the center hole of the motor end cover 100 respectively, thereby independently sealing the center hole; the support plate 506 is fixed relative to the positive pressure storage unit 300, and the plurality of springs 4 507 on the support plate 506 can play a role in elastically supporting the bucket 501. The plurality of springs 3 406 between the connecting plate 402 and the buckle cover body 401 can also play a role in elastically supporting the buckle cover body 401;

[0082] When in use, the oil cylinder 403 will push the buckle cover body 401 to squeeze the motor end cover 100. At this time, the buckle cover body 401 and the support bucket 501 cooperate to squeeze the two sides of the motor end cover 100. The docking tube 1 407 and the docking tube 2 504 are docked with the two sides of the center hole of the motor end cover 100 respectively. The negative pressure in the negative pressure barrel 201 and the positive pressure in the positive pressure barrel 301 are transmitted to the buckle cover body 401 and the support bucket 501. Since there is a gap between the piston 3 505 and the docking tube 2 504, the positive pressure is also transmitted to the center hole of the motor end cover 100. As the oil cylinder 403 continues to extend, the spring 3 406 and the spring 4 507 will be compressed. At this time, the support bucket 501 is relative to the support plate 506 and When the positive pressure tube 302 moves, the piston 3 505 on the positive pressure tube 302 will move into the docking tube 2 504, and the center hole of the motor end cover 100 will no longer be connected to the positive pressure detection space. At the same time, the buckle cover body 401 will produce relative movement with the connecting plate 402, and the capillary 404 will push the piston 2 408 to slide in the docking tube 1 407, thereby reducing the internal space of the center hole of the motor end cover 100 and increasing its pressure. The pressure will be greater than the pressure in the positive pressure detection space, thereby making the motor end cover 100 have a triple pressure gradient. The pressure gauge 409 is used to detect whether the internal pressure value of the center hole of the motor end cover 100 changes, thereby achieving the purpose of detecting the air tightness of the center hole of the motor end cover 100.

[0083] In actual use, the elastic coefficient of spring four 507 needs to be smaller than the elastic coefficient of spring three 406, so that after piston three 505 in the support bucket 501 moves into docking tube two 504, piston two 408 moves in docking tube one 407; in order to improve the stability of the movement of the buckle cover body 401 and the support bucket 501, guide columns can be set in both spring three 406 and spring four 507.

[0084] A method for quickly detecting the air tightness of a motor end cover, using the above-mentioned device for quickly detecting the air tightness of a motor end cover, comprises the following steps:

[0085] Place the two motor end covers 100 on the two lifting units 500, and use the two pressing units 400 to squeeze and fix the motor end covers 100;

[0086] Both the closing plate 1 203 and the closing plate 2 303 are in idle positions;

[0087] The negative pressure storage unit 200 has a negative pressure environment, the positive pressure storage unit 300 has a positive pressure environment, the pressure between the buckle unit 400 and the motor end cover 100 is negative, and the pressure between the lifting unit 500 and the motor end cover 100 is positive;

[0088] Move the sealing disc 1 203 and the sealing disc 2 303 to one side of the corresponding negative pressure storage unit 200 and the positive pressure storage unit 300, so that the negative pressure storage unit 200 and the positive pressure storage unit 300 only detect one motor end cover 100, while the other motor end cover 100 is in a waiting state;

[0089] The pressure detection unit is used to detect whether the internal pressure of the negative pressure storage unit 200 and the positive pressure storage unit 300 changes, so as to determine whether the air tightness of the motor end cover 100 meets the standard;

[0090] When one motor end cover 100 is inspected, the sealing disc 1 203 and the sealing disc 2 303 are moved to the other side of the corresponding negative pressure storage unit 200 and the positive pressure storage unit 300 to inspect the other motor end cover 100;

[0091] Remove the motor end cover 100 that has been inspected and replace it with a new motor end cover 100;

[0092] The reciprocating motion of the sealing disc 1 203 and the sealing disc 2 303 in the corresponding negative pressure storage unit 200 and the positive pressure storage unit 300 is utilized to realize the continuous detection of the motor end cover 100 .

[0093] By using the above method, a positive and negative pressure environment can be quickly formed on both sides of the motor end cover 100, so that the motor end cover 100 can be quickly put into a detection state, shortening the time occupied by the before and after stages of detection, and by using the positive and negative pressure detection method, the difference between the positive and negative pressure and the normal pressure can be reduced, thereby reducing the difficulty of detection; by using the alternating detection method, the purpose of continuous detection of a single device can be achieved.

[0094] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid detection device for air tightness of a motor end cover, characterized in that: The motor cover comprises a pressing unit and a lifting unit arranged opposite to each other, wherein the pressing unit and the lifting unit are respectively connected to a negative pressure storage unit and a positive pressure storage unit, wherein the negative pressure storage unit cooperates with the pressing unit to provide a negative pressure environment for one side of the motor end cover, and the positive pressure storage unit cooperates with the lifting unit to provide a positive pressure environment for the other side of the motor end cover, and a pressure detection unit is provided on both the negative pressure storage unit and the positive pressure storage unit; The negative pressure storage unit includes a negative pressure barrel, a negative pressure tube and a sealing disk. The negative pressure tubes are arranged at two ends of the negative pressure barrel and are respectively connected to the two buckle units. The sealing disk is arranged in the negative pressure barrel and can reciprocate along its axis to seal the two negative pressure tubes. The positive pressure storage unit includes a positive pressure barrel, a positive pressure pipe and a second sealing disc. The positive pressure pipes are arranged at both ends of the positive pressure barrel and are respectively connected to the two lifting units. The second sealing disc is arranged in the positive pressure barrel and can move back and forth along its axis to seal the two positive pressure pipes. The negative pressure tube is connected to the negative pressure barrel through a pressure relief unit. The pressure relief unit includes a movable cylinder located at the end of the negative pressure barrel and slidably inserted into the negative pressure barrel. A piston 1 is slidably arranged in the movable cylinder. The negative pressure tube is fixedly connected to the piston 1. The sealing disk 1 is used in conjunction with the movable cylinder. The negative pressure tube is fixedly connected to the negative pressure barrel via a fixing plate, and a plurality of springs are provided on the fixing plate for providing elastic force to the movable cylinder; Two sealing rings are provided on both sides of the sealing disk, corresponding to the two movable cylinders, respectively. A deformable air chamber is provided inside the sealing ring. The cross-section of the sealing ring is arched and an annular groove is formed on the side thereof facing the movable cylinder. The bottom size of the annular groove is adapted to the end face size of the movable cylinder and gradually expands toward the groove opening. The inner and outer ring inner walls of the annular groove are both configured as conical surfaces, and the conical surfaces have a plurality of extrusion ridges extending outward. The buckle unit includes a buckle cover body and a connecting plate provided thereon, an oil cylinder and a thin tube are provided on the connecting plate, the connecting plate is driven by the oil cylinder to drive the buckle cover body to move, one end of the thin tube is slidably inserted into the negative pressure tube, and the other end is inserted into the buckle cover body, and a plurality of air holes are opened on the side wall of the thin tube for communicating with the buckle cover body; The lifting unit is arranged on the support plate, and includes a supporting bucket and an air guide chamber arranged in the supporting bucket. The positive pressure tube is slidably inserted into the air guide chamber, and a plurality of air holes for communicating with the air guide chamber are opened on the side wall of the positive pressure tube. The buckle cover body is provided with a docking tube 1, a piston 2 slidably arranged in the docking tube 1, and a pressure gauge mounted on the piston 2. The piston 2 is connected to the thin tube. The connecting plate and the buckle cover body are connected by a plurality of springs 3. The thin tube and the buckle cover body slide relative to each other. The docking tube 1 is used to dock with one side of the center hole of the motor end cover. A docking tube 2 and a support plate are provided in the support bucket, and a piston 3 is provided at one end of the positive pressure tube located in the air guide chamber. The piston 3 is arranged corresponding to the docking tube 2 and can slide along its axial direction. The docking tube 2 is used to dock with the other side of the center hole of the motor end cover, and the support plate and the support bucket are connected by a number of springs 4.

2. A rapid detection device for air tightness of a motor end cover according to claim 1, characterized in that: The positive pressure pipe is connected to the positive pressure barrel through a pressure relief unit, and the positive pressure pipe is also connected to the negative pressure pipe through the pressure relief unit.

3. A rapid detection device for air tightness of a motor end cover according to claim 2, characterized in that: The pressure relief unit includes an insert tube located in the positive pressure barrel and slidably inserted into the positive pressure tube, connected to a fixed tube installed on the end surface of the positive pressure barrel, and a sealing tube slidably inserted into the fixed tube, the insert tube being connected to the sealing tube through a secondary tube; The fixed tube is connected to the negative pressure tube via the air guide tube, and a first air hole is opened on the sealing tube. The sealing tube can block the air guide tube through its outer wall or connect to the air guide tube through the first air hole; The end of the cannula is provided with a connecting disk, a plurality of springs 2 are provided between the connecting disk and the positive pressure barrel, and the sealing disk 2 is used in conjunction with the connecting disk.

4. A method for quickly detecting the air tightness of a motor end cover, using a device for quickly detecting the air tightness of a motor end cover according to any one of claims 1 to 3, comprising the following steps: Place the two motor end covers on the two lifting units and use the two pressing units to squeeze and fix the motor end covers; Both closing plate 1 and closing plate 2 are in idle position; Make the negative pressure storage unit have a negative pressure environment, the positive pressure storage unit have a positive pressure environment, the pressure between the buckle unit and the motor end cover is negative, and the pressure between the lifting unit and the motor end cover is positive; Move the sealing disc 1 and the sealing disc 2 to one side of the corresponding negative pressure storage unit and the positive pressure storage unit, so that the negative pressure storage unit and the positive pressure storage unit only detect one motor end cover, while the other motor end cover is in a waiting state; Use the pressure detection unit to detect whether the internal pressure of the negative pressure storage unit and the positive pressure storage unit changes, so as to determine whether the air tightness of the motor end cover meets the standard; When one motor end cover has completed the inspection, the sealing disc 1 and the sealing disc 2 are moved to the other side of the corresponding negative pressure storage unit and positive pressure storage unit to inspect the other motor end cover; Remove the motor end cover that has been inspected and replace it with a new one; The reciprocating motion of the sealing disc 1 and the sealing disc 2 in the corresponding negative pressure storage unit and the positive pressure storage unit is utilized to realize the continuous detection of the motor end cover.

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