New energy gearbox shell leakage test plugging mechanism

Abstract

The invention discloses a new energy gearbox shell leakage test plugging mechanism, and relates to the technical field of new energy automobile production, the new energy gearbox shell leakage test plugging mechanism comprises a positioning base, a plurality of movable plugging assemblies and an auxiliary inflation mechanism; the auxiliary inflation mechanism is connected with the adjustable sealing mechanism in a matched mode. The plugging block is in butt joint with the opening position of the gearbox empty shell and is sealed through the arranged sealing rubber ring, in the process, the flaring cover arranged on the outer side of the plugging block covers the outer side of the opening position, a sealed space is formed, and then specific detection gas is conveyed into the gearbox empty shell through the inflation and suction pump. If the gas detector detects that specific detection gas exists in the inner side of the flaring cover, leakage exists at the plugging position of the plugging block and the rubber sealing ring, so that an operator is prompted to check the plugging assembly, and the situation that the leakage test detection result of the gearbox empty shell is affected due to the fact that the sealing performance of the plugging assembly becomes poor is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy automobile production, and in particular to a new energy gearbox housing leak testing and plugging mechanism. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional automotive fuels as their power source, and mainly include pure electric vehicles, plug-in hybrid vehicles, extended-range electric vehicles, and fuel cell electric vehicles. Among them, plug-in hybrid vehicles are equipped with gearboxes because they have both an engine and an electric motor. The gearbox is mainly used in hybrid vehicles to adjust the engine speed and torque to adapt to different driving conditions.

[0003] A Chinese patent with authorization announcement number CN110849545B discloses a transmission case leak testing and sealing mechanism, including an internal expansion sealing component; the internal expansion sealing component enters into an opening on the transmission case, and then the annular rubber ring provided in the internal expansion sealing component is flattened by the mutual squeezing effect of the plates, thereby expanding and contacting the inner wall of the opening to achieve sealing and avoid deformation of the transmission case.

[0004] The disadvantage of the above-mentioned prior art solution is that: although the above-mentioned prior art solution allows the annular rubber ring to enter the inner side of the sealed opening, and then rely on deformation to expand and seal the opening, and then the gearbox housing is leak tested, the rubber parts will age with the number of uses and environmental factors, and the sealing effect will gradually deteriorate. Generally, the gearbox housing leak test is performed through air pressure test. When the sealing effect deteriorates or is accidentally damaged and cannot seal the opening well, if the gearbox is leaked at this time, even if the gearbox is inflated and the air pressure changes, it does not necessarily mean that there is a leak in the gearbox housing itself. However, since the sealing component itself in the prior art cannot provide feedback during use whether the normal sealing effect is achieved and whether there is a leak at the sealing position, when the operator tests that the air pressure inside the gearbox housing is abnormal in this case, it is easy to misjudge that there is a problem with the gearbox housing, and it is impossible to determine whether the corresponding leak test result is caused by the deterioration of the sealing effect of the sealing component. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy gearbox housing leak test and plugging mechanism to solve the technical problem in the prior art that the gearbox housing leak test and plugging structure cannot provide feedback on whether the plugging component has problems with the leak test result due to poor sealing effect during testing.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A new energy gearbox housing leak testing and plugging mechanism, comprising a positioning base, and also comprising:

[0008] A movable plugging assembly, wherein the movable plugging assembly is provided in multiple groups, each group of the movable plugging assembly comprises a driving mechanism and an adjustable sealing mechanism, the driving mechanism is used to drive the adjustable sealing mechanism to move linearly, and the adjustable sealing mechanism is provided with a leak detection mechanism;

[0009] The auxiliary inflation mechanism is connected with the adjustable sealing mechanism, and the auxiliary inflation mechanism inflates air into the empty housing of the gearbox through the adjustable sealing mechanism.

[0010] As a further solution of the present invention: the driving mechanism includes a hydraulic telescopic rod and a connecting plate, the hydraulic telescopic rod is fixedly distributed on the outside of the positioning base, the connecting plate is fixedly connected to the telescopic end of the hydraulic telescopic rod, and the adjustable sealing mechanism is installed on the connecting plate.

[0011] As a further solution of the present invention: the adjustable sealing mechanism includes a sealing block, a movable bottom plate, a sealing rubber ring and a piston-type linkage mechanism for linking the movable bottom plate to compress the sealing rubber ring; the sealing block is fixedly connected to the connecting plate, the movable bottom plate is arranged parallel to the bottom of the sealing block, and a limiting spring is connected between the movable bottom plate and the sealing block, the sealing rubber ring is fixedly arranged on the movable bottom plate, the piston-type linkage mechanism is cooperatively connected with the auxiliary inflation mechanism, the leakage detection mechanism is arranged around the sealing block, and the bottom surface of the movable bottom plate is installed with a main air pressure sensor.

[0012] As a further solution of the present invention: the auxiliary inflation mechanism includes an inflation and suction pump, a detection gas storage tank and a main inflation pipe, the detection gas storage tank is equipped with a one-way air outlet valve, and a vacuum hose is connected between the one-way air outlet valve and an air port on one side of the inflation and suction pump, the main inflation pipe is fixedly connected between the blocking block and the connecting plate, one end of the main inflation pipe is connected to the air port on the other side of the inflation and suction pump, a first electric-controlled valve is fixedly installed on the bottom surface of the movable bottom plate, and a corrugated expansion tube is connected between the other end of the main inflation pipe and the first electric-controlled valve, and the air port of the inflation and suction pump close to the main inflation pipe is cooperated with the piston linkage mechanism.

[0013] As a further solution of the present invention: the piston-type linkage mechanism includes a lifting guide column, a linkage pressure plate, a linkage baffle and a supporting piston assembly, the lifting guide column longitudinally penetrates the connecting plate, the bottom end of the lifting guide column penetrates the blocking block and is fixedly connected to the corresponding movable bottom plate, the linkage pressure plate is fixedly connected to the top of the lifting guide column, the linkage baffle is aligned and arranged below the linkage pressure plate, the supporting piston assembly is arranged below the linkage pressure plate, and the linkage baffle cooperates with the supporting piston assembly, and an auxiliary inflation pipe is cooperated between the air port of the inflation and suction pump close to the main inflation pipe and the supporting piston assembly.

[0014] As a further solution of the present invention: the supporting piston assembly includes a fixed sleeve and a piston slide, the fixed sleeve is fixedly connected to the connecting plate, the piston slide is slidably inserted into the bottom of the fixed sleeve, a first one-way air intake valve is fixedly provided on one side of the top of the fixed sleeve, and the auxiliary air filling pipe is connected to the fixed sleeve through the first one-way air intake valve, a second electrically-controlled valve is fixedly provided on the other side of the fixed sleeve, a secondary air pressure sensor is installed inside the fixed sleeve, and the secondary air pressure sensor is electrically connected to the corresponding first electrically-controlled valve.

[0015] As a further solution of the present invention: the leakage detection mechanism includes a diffusion cover and a gas detector, the diffusion cover is fixedly connected to the outer wall of the blocking block, and the gas detector is fixedly installed on the diffusion cover.

[0016] As a further solution of the present invention: the inflation and suction pump is equipped with a recovery storage tank, a second one-way air inlet valve is installed on the recovery storage tank, the exhaust hose is connected to a bypass pipe at one end close to the detection gas storage tank, and the end of the bypass pipe is connected to the second one-way air inlet valve, and each of the blocking blocks is provided with an adjustable auxiliary suction mechanism that cooperates with the corresponding movable bottom plate.

[0017] As a further solution of the present invention: the adjustable auxiliary suction mechanism includes an auxiliary suction pipe and a blocking column, the auxiliary suction pipe is fixedly arranged inside the blocking block, and one end of the auxiliary suction pipe is connected to the expansion mask, and the other end is connected to the main inflation pipe, the blocking column is vertically fixedly connected to the movable bottom plate, the auxiliary suction pipe is provided with a side opening, and the end of the blocking column away from the movable bottom plate slides and is inserted into the side opening.

[0018] As a further solution of the present invention: limiting screws are provided on both sides of the connecting plate, and the limiting screws are threadedly connected to the connecting plate, and a pressure sensing switch electrically connected to the inflation and suction pump is installed at one end of the limiting screw close to the positioning base, and the pressure sensing switch is also electrically connected to the hydraulic telescopic rod.

[0019] Beneficial effects of the present invention:

[0020] 1. The sealing block of the present invention is connected to the opening position on the gearbox shell and is sealed by a sealing rubber ring. During this process, the expansion mask arranged on the outside of the sealing block covers the outside of the opening position and forms a sealed space. Then, the specific detection gas is delivered to the gearbox shell by means of an air filling and suction pump. If the gas detector detects the presence of the specific detection gas on the inside of the expansion mask, it indicates that there is a leak at the position blocked by the sealing block and the rubber sealing ring, thereby prompting the operator to check the sealing component to avoid affecting the gearbox shell leak test result due to the deterioration of the sealing performance of the sealing component.

[0021] 2. When the sealing block of the present invention is initially connected to the opening of the gearbox empty shell, the matching movable bottom plate and the sealing rubber ring enter the inner side of the opening. At this time, the filling and suction pump is started to deliver the test gas. Since the first electrically controlled valve on the movable bottom plate is initially closed, the gas first enters the space between the fixed sleeve and the piston slide, and the piston slide is stretched open by air pressure. The piston slide then abuts against the linkage baffle plate. Then, the linkage pressure plate drives the lifting guide column to rise by the reaction force, so that the movable bottom plate rises and compresses the sealing rubber ring, so that the sealing rubber ring is flattened, the lateral area is increased, and the sealing rubber ring abuts against the inner wall of the opening laterally to achieve automatic sealing. When disassembly and separation are required, it is only necessary to reduce the air pressure between the piston slide and the fixed sleeve, so that the movable bottom plate can be lowered, the sealing rubber ring can be restored, and it can be directly separated, which is safe and convenient without damaging the gearbox housing.

[0022] 3. When the gearbox empty shell is filled with specific detection gas, the auxiliary suction pipe connected to the expansion mouth is blocked by the blocking column, which can prevent the detection gas from entering the expansion mouth and affecting the detection. When the detection gas needs to be recovered, the air pressure between the piston slide and the fixed sleeve is first reduced, and the movable bottom plate is linked to drop and reset, and the movable bottom plate drives the blocking column to move out of the auxiliary suction pipe, so that the main inflation pipe is connected to the interior of the expansion mouth through the auxiliary suction pipe. At this time, the suction function of the inflation and suction pump is directly started, and the detection gas inside the gearbox empty shell and leaked into the expansion mouth can be directly sucked away. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a partial structural schematic diagram of the blocking block and the movable bottom plate in the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the expansion cover and the blocking block in the present invention in a bottom view in cooperation with each other;

[0027] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 5 It is a schematic diagram of the structure of the fixed sleeve and the piston slide cylinder in the present invention;

[0029] Figure 6 It is a schematic diagram of the state when the blocking block of the present invention is lowered and docked with the empty housing of the gearbox;

[0030] Figure 7 yes Figure 6Schematic diagram of the enlarged structure at point B in the middle.

[0031] In the figure: 1. Positioning base; 2. Hydraulic telescopic rod; 3. Connecting plate; 4. Limit screw; 5. Pressure sensing switch; 6. Upper cover; 7. Empty gearbox shell; 8. Detection gas storage tank; 9. Recovery storage tank; 10. One-way air outlet valve; 11. Bypass pipe; 12. Second one-way air inlet valve; 13. Air extraction hose; 14. Blocking block; 15. Expansion mask; 16. Gas detector; 17. Movable bottom plate; 18. Sealing rubber ring; 19. Limit spring; 20. Lifting guide column; 21. Main inflation tube; 22. Bellows expansion tube; 23. First electrically controlled valve; 24. Main air pressure sensor; 25. Linkage pressure plate; 26. Linkage baffle; 27. Inflator and suction pump; 28. Auxiliary inflation tube; 29. ​​Fixed sleeve; 30. First one-way air inlet valve; 31. Second electrically controlled valve; 32. Blocking column; 33. Auxiliary suction tube; 34. Auxiliary air pressure sensor; 35. Piston slide cylinder. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-Figure 7 As shown, a new energy gearbox housing leak test plugging mechanism includes a positioning base 1, a positioning groove matched with a gearbox empty shell 7 is opened on the positioning base 1, and a rubber sealing gasket is distributed in the positioning groove. When the gearbox empty shell 7 needs to be leak tested, the corresponding side of the gearbox empty shell 7 is fitted and embedded in the positioning groove and pressed tightly. At this time, the corresponding through-shaft opening position distributed on the gearbox empty shell 7 faces upward; the leak test plugging mechanism also includes a movable plugging component and an auxiliary inflation mechanism;

[0034] There are multiple groups of movable plugging components, specifically: a corresponding number of movable plugging components can be set based on the number of openings distributed on the actual gearbox shell 7 and the distribution angle position, and the movement direction of the movable plugging components at different positions is set according to the angle of the opening distribution position on the gearbox shell 7. Each group of movable plugging components includes a driving mechanism and an adjustable sealing mechanism. The driving mechanism is used to drive the adjustable sealing mechanism to move linearly to plug the opening at the corresponding position on the gearbox shell 7. The adjustable sealing mechanism is provided with a leak detection mechanism.

[0035] The auxiliary inflation mechanism is connected with the adjustable sealing mechanism, and the auxiliary inflation mechanism inflates air into the gearbox empty shell 7 through the adjustable sealing mechanism, and during the inflation process, the adjustable sealing mechanism automatically adjusts and blocks the opening at the corresponding position on the gearbox empty shell 7.

[0036] In some specific embodiments, the driving mechanism includes a hydraulic telescopic rod 2 and a connecting plate 3. The hydraulic telescopic rod 2 is fixedly distributed on the outside of the positioning base 1, and the connecting plate 3 is fixedly connected to the telescopic end of the hydraulic telescopic rod 2. The adjustable sealing mechanism is installed on the connecting plate 3. By controlling the extension and retraction of the hydraulic telescopic rod 2, the adjustable sealing mechanism can be docked or separated from the opening on the gearbox housing 7.

[0037] In some specific embodiments, such as Figure 2 As shown, the adjustable sealing mechanism includes a blocking block 14, a movable bottom plate 17, a sealing rubber ring 18 and a piston-type linkage mechanism for linking the movable bottom plate 17 to compress the sealing rubber ring 18; the blocking block 14 is fixedly connected to the connecting plate 3, and the blocking block 14 is aligned with the corresponding opening on the gearbox empty shell 7, and the sizes are matched, the movable bottom plate 17 is arranged in parallel below the blocking block 14, and a limit spring 19 is connected between the movable bottom plate 17 and the blocking block 14, and the limit spring 19 is compressible, the sealing rubber ring 18 is fixedly arranged on the movable bottom plate 17, and the sealing rubber ring 18 is between the movable bottom plate 17 and the blocking block 14, the sealing rubber ring 18 can be laterally deformed and flattened when squeezed, and the sizes of the movable bottom plate 17 and the sealing rubber ring 18 in the original state are slightly smaller than the corresponding opening size on the gearbox empty shell 7, the piston-type linkage mechanism is connected with the auxiliary inflation mechanism, the leakage detection mechanism is arranged around the blocking block 14, and the bottom surface of the movable bottom plate 17 is installed with a main air pressure sensor 24.

[0038] Among them, combined Figure 1 and Figure 2As shown, the auxiliary inflation mechanism includes an inflation and suction pump 27, a detection gas storage tank 8 and a main inflation pipe 21. The inflation and suction pump 27 is fixedly connected to the connecting plate 3. The detection gas storage tank 8 stores an easily detectable safe gas, such as carbon dioxide. A one-way air outlet valve 10 is installed on the detection gas storage tank 8, and an air extraction hose 13 is connected between the one-way air outlet valve 10 and a gas port on one side of the inflation and suction pump 27. The main inflation pipe 21 is fixedly connected between the blocking block 14 and the connecting plate 3, and one end of the main inflation pipe 21 is connected to the gas port on the other side of the inflation and suction pump 27. A first electrically-controlled valve 23 is fixedly installed on the bottom surface of the movable bottom plate 17, and a corrugated telescopic tube 22 is connected between the other end of the main inflation tube 21 and the first electrically-controlled valve 23. It should be noted that multiple sets of adjustable sealing mechanisms can be installed on the same connecting plate 3, and the blocking blocks 14 of each set of adjustable sealing mechanisms are correspondingly provided with main inflation tubes 21, first electrically-controlled valves 23 and other components. Multiple main inflation tubes 21 can be connected to the air port of the same inflation and suction pump 27; the inflation and suction pump 27 is connected to the piston-type linkage mechanism near the air port of the main inflation tube 21.

[0039] In some specific embodiments, such as Figure 2 As shown, the piston-type linkage mechanism includes a lifting guide column 20, a linkage pressure plate 25, a linkage baffle 26 and a supporting piston assembly. The lifting guide column 20 longitudinally penetrates the connecting plate 3, and the lifting guide column 20 can slide longitudinally relative to the connecting plate 3. The bottom end of the lifting guide column 20 penetrates the blocking block 14 and is fixedly connected to the corresponding movable bottom plate 17. The linkage pressure plate 25 is fixedly connected to the top of the lifting guide column 20, and the linkage baffle 26 is aligned and arranged below the linkage pressure plate 25. The supporting piston assembly is arranged below the linkage pressure plate 25, and the linkage baffle 26 cooperates with the supporting piston assembly. The linkage baffle 26 is fixedly arranged relative to the positioning base 1. In order to facilitate the installation of the linkage baffle 26, the upper cover plate 6 can be fixedly installed above the positioning base 1 through a bracket. The linkage baffle 26 is directly fixedly connected to the upper cover plate 6 through the bracket. An auxiliary inflation pipe 28 is provided between the air port of the inflation and suction pump 27 close to the main inflation pipe 21 and the supporting piston assembly. The auxiliary inflation pipe 28 is a hose.

[0040] In some specific embodiments, such as Figure 5As shown, the supporting piston assembly includes a fixed sleeve 29 and a piston slide 35. The fixed sleeve 29 is fixedly connected to the connecting plate 3. The piston slide 35 is slidably inserted into the bottom of the fixed sleeve 29. One end of the piston slide 35 inserted into the fixed sleeve 29 is provided with an outward folding edge. The bottom of the fixed sleeve 29 is provided with an inward folding edge that matches the outward folding edge. The outward folding edge and the inward folding edge cooperate to prevent the piston slide 35 from detaching. A first one-way air intake valve 30 is fixedly provided on one side of the top of the fixed sleeve 29, and the auxiliary inflation pipe 28 is connected to the fixed sleeve 29 through the first one-way air intake valve 30. A second electrically-controlled valve 31 is fixedly provided on the other side of the fixed sleeve 29. A secondary air pressure sensor 34 is installed inside the fixed sleeve 29, and the secondary air pressure sensor 34 is electrically connected to the corresponding first electrically-controlled valve 23.

[0041] When it is necessary to test the gearbox housing 7 for leaks, the hydraulic telescopic rod 2 drives the blocking block 14 to move and dock with the corresponding opening of the gearbox housing 7. During this process, the linkage pressure plate 25 corresponding to the blocking block 14 moves synchronously close to the linkage baffle 26, and the combined structure of the fixed sleeve 29 and the piston slide 35 on the linkage pressure plate 25 is in a contracted state, and as the blocking block 14 moves and fits onto the linkage baffle 26, when the blocking block 14 docks with the corresponding opening position, the movable bottom plate 17 and the sealing rubber ring 18 enter the opening. The air pump 27 is started to inflate the gas, and the air pump 27 draws the corresponding gas from the detection gas storage tank 8 through the suction hose 13, and fills the gas into the space between the fixed sleeve 29 and the piston slide cylinder 35 through the auxiliary air filling pipe 28. At this time, the first electric control valve 23 and the second electric control valve 31 are both in the closed state, and the gas cannot be filled into the gearbox empty shell 7 temporarily, and stays in the main air filling pipe 21, and the air pressure in the space between the fixed sleeve 29 and the piston slide cylinder 35 rises, so that the piston The slide cylinder 35 pushes downward to act on the linkage baffle 26, thereby relying on the reaction force to push the fixed sleeve 29 and the linkage pressure plate 25 to rise, so that the lifting guide column 20 drives the movable bottom plate 17 to compress the limit spring 19 to rise. In this process, the movable bottom plate 17 compresses the sealing rubber ring 18 between it and the blocking block 14, causing the sealing rubber ring 18 to be flattened and the lateral area to increase. In this way, the sealing rubber ring 18 will contact the inner wall of the opening of the gearbox housing 7 to achieve sealing, and at the same time, it can also avoid directly forcing the seal with great force. The pressure is applied to the side wall of the gearbox housing 7, causing it to deform. During this process, the air pressure in the space between the fixed sleeve 29 and the piston slide 35 rises to a set value, and the auxiliary air pressure sensor 34 feeds back a signal, which is received by the matching controller, and an instruction is issued to control the first electrically controlled valve 23 to open. At this time, the air filling and suction pump 27 fills gas into the gearbox housing 7 through the main air filling pipe 21, and relies on the main air pressure sensor 24 on the bottom of the movable bottom plate 17 to detect whether the internal pressure changes after a certain amount of gas is filled, which is convenient for leak detection.

[0042] In some specific implementation schemes, the leak detection mechanism includes a diffusion mask 15 and a gas detector 16. The diffusion mask 15 is fixedly connected to the outer wall of the sealing block 14, and the bottom of the diffusion mask 15 is an opening. The size of the diffusion mask 15 is larger than the opening size of the corresponding position on the gearbox shell 7, and the bottom edge contour of the diffusion mask 15 matches the outer wall shape of the corresponding position of the gearbox shell 7, and a rubber pad is also installed. When the sealing block 14 is docked to the corresponding opening position, the bottom of the diffusion mask 15 is fitted and docked to the outer wall of the gearbox shell 7 to form a closed space; the gas detector 16 is fixedly installed on the diffusion mask 15, and the detection probe of the gas detector 16 It is located on the inner side of the expansion cover 15. It needs to be explained that if the filling and suction pump 27 fills in carbon dioxide gas, the gas detector 16 is an existing carbon dioxide detector. When the sealing block 14 cooperates with the sealing rubber ring 18 to seal the opening position of the gearbox empty shell 7 for leak testing, if the main air pressure sensor 24 feedback air pressure value becomes abnormally small, then the detection situation of the gas detector 16 can be observed. If the gas detector 16 detects the value of the corresponding gas, it means that the sealing block 14 and the sealing rubber ring 18 may not seal the opening position well, resulting in a problem with the test air pressure, and it is not necessarily that there is a leak in the gearbox empty shell 7 itself, which is convenient for the operator to make a judgment.

[0043] In some specific embodiments, in combination Figure 1 and Figure 2 As shown, the air filling and suction pump 27 is equipped with a recovery storage tank 9, and a second one-way air inlet valve 12 for storing gas is installed on the recovery storage tank 9. The end of the exhaust hose 13 close to the detection gas storage tank 8 is connected to the bypass pipe 11, and the end of the bypass pipe 11 is connected to the second one-way air inlet valve 12. The second one-way air inlet valve 12 allows the air flow to enter the recovery storage tank 9 only through the bypass pipe 11, and cannot be discharged from the recovery storage tank 9. The second electrically controlled valve 31 is also connected to the recovery storage tank 9 through a pipeline. It should be noted that the recovery storage tank 9 is equipped with a valve for discharging recovered gas, which is convenient for discharge for other purposes; each blocking block 14 is internally provided with an adjustable auxiliary suction mechanism that cooperates with the corresponding movable bottom plate 17.

[0044] Among them, Figure 4As shown, the adjustable auxiliary suction mechanism includes an auxiliary suction pipe 33 and a blocking column 32. The auxiliary suction pipe 33 is fixedly arranged inside the blocking block 14, and one end of the auxiliary suction pipe 33 is connected to the expansion cover 15, and the other end is connected to the main inflation pipe 21. The blocking column 32 is vertically fixedly connected to the movable bottom plate 17. A side opening is provided on the auxiliary suction pipe 33, and one end of the blocking column 32 away from the movable bottom plate 17 is slidably inserted into the side opening, and the end size of the blocking column 32 matches the internal size of the auxiliary suction pipe 33. When the movable bottom plate 17 is not pressed, the auxiliary suction pipe 33 is fixedly connected to the main inflation pipe 21. When the sealing rubber ring 18 is compressed, the blocking column 32 does not cut off and block the auxiliary suction pipe 33. When the lifting guide column 20 drives the movable bottom plate 17 to rise and compress the sealing rubber ring 18, the blocking column 32 moves synchronously with the movable bottom plate 17, thereby cutting off and blocking the auxiliary suction pipe 33. At this time, the main inflation pipe 21 is inflated to prevent the injected test gas from entering the expansion mask 15, thereby preventing the gas detector 16 from detecting whether there is a leak in the expansion mask 15. After the detection is completed, in order to avoid the detection of the test gas leaking out of the expansion mask 15, the gas detector 16 can detect the leaking test gas. The gas leaks directly into the external environment, so it is necessary to start the suction function of the air filling and suction pump 27. Before starting, first open the second electrically controlled valve 31 to release the gas in the space between the fixed sleeve 29 and the piston slide cylinder 35. The gas can enter the recovery storage tank 9 through the pipeline. Since the air pressure in the space between the fixed sleeve 29 and the piston slide cylinder 35 is reduced, the lifting guide column 20 and the movable bottom plate 17 are reset by the rebound force of the limit spring 19, thereby driving the blocking column 32 to descend and disengage from the auxiliary suction pipe 33. In this way, when the air filling and suction pump 27 is in suction, the air filling and suction pump 27 is in suction. When the air function is in use, the air filling and suction pump 27 draws the test gas from the inside of the gearbox empty shell 7 through the main air filling pipe 21, and also draws the gas leaked into the expansion cover 15 through the auxiliary suction pipe 33, and sends it to the recovery storage tank 9 for storage. It should be noted that after suction, the air pressure inside the expansion cover 15 and the gearbox empty shell 7 may be reduced, causing the expansion cover 15 to be sucked on due to the internal and external air pressure difference and unable to be removed. A manual valve may be installed on the expansion cover 15. When it needs to be removed, the manual valve can be opened to balance the internal and external air pressures.

[0045] In some specific implementation schemes, limit screws 4 are provided on both sides of the connecting plate 3, and the limit screws 4 are threadedly connected to the connecting plate 3. A pressure sensing switch 5 electrically connected to the inflation function control circuit of the inflation pump 27 is installed on one end of the limit screw 4 close to the positioning base 1. The pressure sensing switch 5 is also electrically connected to the control circuit of the hydraulic telescopic rod 2. When the pressure sensing switch 5 senses the corresponding pressure value, it is fed back to the matching controller. The controller sends an instruction to stop the operation of the hydraulic telescopic rod 2 according to the received signal, and adjusts the distance between the end of the limit screw 4 and the positioning base 1 to ensure that when the limit screw 4 descends and hits the positioning base 1, the blocking block 14 is just connected to the opening at the corresponding position on the gearbox shell 7. At this time, after the pressure sensing switch 5 detects the corresponding pressure value, the hydraulic telescopic rod 2 will be stopped to prevent the blocking block 14 from excessively squeezing the gearbox shell 7 and causing deformation. At the same time, the pressure sensing switch 5 also enables the inflation pump 27 to operate, suck the detection gas from the detection gas storage tank 8, and transport it to the gearbox shell 7 for leak testing.

[0046] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0047] First, one side of the gearbox shell 7 is fitted and embedded into the positioning groove on the positioning base 1 and pressed tightly. At this time, the corresponding shaft opening on the gearbox shell 7 faces upward, and then the hydraulic telescopic rod 2 is started to drive the blocking block 14 to move and dock with the corresponding opening of the gearbox shell 7 through the connecting plate 3. During this process, the linkage pressure plate 25 corresponding to the blocking block 14 moves synchronously close to the linkage baffle 26, and the combined structure of the fixed sleeve 29 and the piston slide 35 on the linkage pressure plate 25 is in a contracted state, and fits onto the linkage baffle 26 as the blocking block 14 moves. When the blocking block 14 is connected to the corresponding opening position, the movable bottom plate 17 and the sealing rubber ring 18 enter the inner side of the opening, and the air filling and suction pump 27 is started to perform the inflation function. The air filling and suction pump 27 sucks the corresponding gas from the detection gas storage tank 8 through the suction hose 13, and fills it into the space between the fixed sleeve 29 and the piston slide cylinder 35 through the auxiliary inflation pipe 28. At this time, the first electrically controlled valve 23 and the second electrically controlled valve 31 are both in the closed state, so the gas cannot be temporarily filled into the gearbox housing 7, and stays in the main inflation pipe 21, and the fixed sleeve 29 is filled with air. The air pressure in the space between the piston slide 35 rises, so that the piston slide 35 pushes downward to act on the linkage baffle 26, thereby relying on the reaction force to push the fixed sleeve 29 and the linkage pressure plate 25 to rise, so that the lifting guide column 20 drives the movable bottom plate 17 to compress the limit spring 19 to rise. In this process, the movable bottom plate 17 compresses the sealing rubber ring 18 between it and the blocking block 14, causing the sealing rubber ring 18 to be flattened and the lateral area to increase. In this way, the sealing rubber ring 18 contacts the inner wall of the opening of the gearbox housing 7 to achieve sealing, and at the same time, it can also avoid The seal is directly pressed against the side wall of the gearbox housing 7 with great force to cause deformation. During this process, the air pressure in the space between the fixed sleeve 29 and the piston slide 35 rises to a set value, and the auxiliary air pressure sensor 34 feeds back a signal, which is received by the matching controller, and a command is issued to control the first electric control valve 23 to open. At this time, the air filling and suction pump 27 fills the gearbox housing 7 with gas through the main air filling pipe 21, and relies on the main air pressure sensor 24 on the bottom of the movable bottom plate 17 to detect whether the internal pressure changes after a certain amount of gas is filled, so as to facilitate the detection of leakage;

[0048] And after the sealing block 14 is docked to the corresponding opening position, the bottom of the expansion cover 15 is fitted and docked to the outer wall of the gearbox empty shell 7 to form a closed space; if the filling and suction pump 27 fills carbon dioxide gas into the gearbox empty shell 7, the gas detector 16 is an existing carbon dioxide detector. When the sealing block 14 cooperates with the sealing rubber ring 18 to seal the opening position of the gearbox empty shell 7 for leak testing, if the main air pressure sensor 24 feedback air pressure value becomes abnormally small, then the detection situation of the gas detector 16 can be observed at this time. If the gas detector 16 detects the value of the corresponding gas, it means that the sealing block 14 and the sealing rubber ring 18 may not seal the opening position well or the seal is damaged, resulting in a problem with the test air pressure, and it is not necessarily that there is a leak in the gearbox empty shell 7 itself, which is convenient for the operator to make a judgment.

[0049] After the detection is completed, in order to prevent the detection gas from leaking directly into the external environment, it is necessary to start the suction function of the air filling and suction pump 27. Before starting, first open the second electrically controlled valve 31 to release the gas in the space between the fixed sleeve 29 and the piston slide cylinder 35. The gas can enter the recovery storage tank 9 through the pipeline. Since the air pressure in the space between the fixed sleeve 29 and the piston slide cylinder 35 decreases, the lifting guide column 20 and the movable bottom plate 17 are reset by the rebound force of the limit spring 19, thereby driving the blocking column 32 to descend and disengage from the auxiliary suction pipe 33. When the air filling and suction pump 27 performs the air suction function, the air filling and suction pump 27 extracts the test gas from the inside of the gearbox empty shell 7 through the main air filling pipe 21, and also extracts the gas leaked into the expansion cover 15 through the auxiliary suction pipe 33, and sends it to the recovery storage tank 9 for storage. It should be noted that after suction, the air pressure inside the expansion cover 15 and the gearbox empty shell 7 may be reduced, causing the expansion cover 15 to be sucked on it due to the internal and external air pressure difference and unable to be removed. A manual valve may be installed on the expansion cover 15. When it needs to be removed, the manual valve can be opened to balance the internal and external air pressures.

[0050] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A new energy gearbox housing leak testing and plugging mechanism, comprising a positioning base (1), characterized in that: Also includes: A movable plugging assembly, wherein the movable plugging assembly is provided in multiple groups, each group of the movable plugging assembly comprises a driving mechanism and an adjustable sealing mechanism, the driving mechanism is used to drive the adjustable sealing mechanism to move linearly, and the adjustable sealing mechanism is provided with a leak detection mechanism; The auxiliary air-charging mechanism is connected with the adjustable sealing mechanism, and the auxiliary air-charging mechanism inflates air into the gearbox housing (7) through the adjustable sealing mechanism.

2. A new energy gearbox housing leak testing and plugging mechanism according to claim 1, characterized in that: The driving mechanism comprises a hydraulic telescopic rod (2) and a connecting plate (3); the hydraulic telescopic rod (2) is fixedly distributed on the outside of the positioning base (1); the connecting plate (3) is fixedly connected to the telescopic end of the hydraulic telescopic rod (2); and the adjustable sealing mechanism is mounted on the connecting plate (3).

3. A new energy gearbox housing leak testing and plugging mechanism according to claim 1, characterized in that: The adjustable sealing mechanism comprises a blocking block (14), a movable bottom plate (17), a sealing rubber ring (18) and a piston-type linkage mechanism for linking the movable bottom plate (17) to compress the sealing rubber ring (18); the blocking block (14) is fixedly connected to the connecting plate (3), the movable bottom plate (17) is arranged parallel to the bottom of the blocking block (14), and a limit spring (19) is connected between the movable bottom plate (17) and the blocking block (14); the sealing rubber ring (18) is fixedly arranged on the movable bottom plate (17), the piston-type linkage mechanism is connected with the auxiliary inflation mechanism, the leakage detection mechanism is arranged around the blocking block (14), and the bottom surface of the movable bottom plate (17) is installed with a main air pressure sensor (24).

4. A new energy gearbox housing leak testing and plugging mechanism according to claim 3, characterized in that: The auxiliary inflation mechanism comprises an inflation and suction pump (27), a detection gas storage tank (8) and a main inflation pipe (21); a one-way air outlet valve (10) is installed on the detection gas storage tank (8), and an air extraction hose (13) is connected between the one-way air outlet valve (10) and a gas port on one side of the inflation and suction pump (27); a main inflation pipe (21) is fixedly connected between the blocking block (14) and the connecting plate (3); one end of the main inflation pipe (21) is communicated with a gas port on the other side of the inflation and suction pump (27); a first electric control valve (23) is fixedly installed on the bottom surface of the movable bottom plate (17), and a corrugated telescopic tube (22) is connected between the other end of the main inflation pipe (21) and the first electric control valve (23); and the gas port of the inflation and suction pump (27) close to the main inflation pipe (21) is cooperatively connected with a piston linkage mechanism.

5. A new energy gearbox housing leak testing and plugging mechanism according to claim 4, characterized in that: The piston linkage mechanism comprises a lifting guide column (20), a linkage pressure plate (25), a linkage baffle (26) and a supporting piston assembly. The lifting guide column (20) longitudinally penetrates the connecting plate (3). The bottom end of the lifting guide column (20) penetrates the blocking block (14) and is fixedly connected to the corresponding movable bottom plate (17). The linkage pressure plate (25) is fixedly connected to the top of the lifting guide column (20). The linkage baffle (26) is aligned and arranged below the linkage pressure plate (25). The supporting piston assembly is arranged below the linkage pressure plate (25), and the linkage baffle (26) cooperates with the supporting piston assembly. An auxiliary inflation pipe (28) is arranged between the air port of the inflation and suction pump (27) close to the main inflation pipe (21) and the supporting piston assembly.

6. A new energy gearbox housing leak testing and plugging mechanism according to claim 5, characterized in that: The supporting piston assembly comprises a fixed sleeve (29) and a piston slide (35), wherein the fixed sleeve (29) is fixedly connected to the connecting plate (3), and the piston slide (35) is slidably inserted into the bottom of the fixed sleeve (29), and a first one-way air intake valve (30) is fixedly arranged on one side of the top of the fixed sleeve (29), and the auxiliary air filling pipe (28) is connected to the fixed sleeve (29) through the first one-way air intake valve (30), and a second electric control valve (31) is fixedly arranged on the other side of the fixed sleeve (29), and a secondary air pressure sensor (34) is installed inside the fixed sleeve (29), and the secondary air pressure sensor (34) is electrically connected to the corresponding first electric control valve (23).

7. A new energy gearbox housing leak testing and plugging mechanism according to claim 3, characterized in that: The leak detection mechanism comprises a diffusion cover (15) and a gas detector (16); the diffusion cover (15) is fixedly connected to the outer wall of the blocking block (14) in a surrounding manner; and the gas detector (16) is fixedly mounted on the diffusion cover (15).

8. A new energy gearbox housing leak testing and plugging mechanism according to claim 4, characterized in that: The air filling and suction pump (27) is equipped with a recovery storage tank (9), and a second one-way air intake valve (12) is installed on the recovery storage tank (9). The end of the air extraction hose (13) close to the detection gas storage tank (8) is connected to a bypass pipe (11), and the end of the bypass pipe (11) is connected to the second one-way air intake valve (12). Each of the blocking blocks (14) is internally provided with an adjustable auxiliary suction mechanism that cooperates with the corresponding movable bottom plate (17).

9. A new energy gearbox housing leak testing and plugging mechanism according to claim 8, characterized in that: The adjustable auxiliary suction mechanism comprises an auxiliary suction pipe (33) and a blocking column (32); the auxiliary suction pipe (33) is fixedly arranged inside the blocking block (14); one end of the auxiliary suction pipe (33) is connected to the expansion cover (15), and the other end is connected to the main inflation pipe (21); the blocking column (32) is vertically fixedly connected to the movable bottom plate (17); a side opening is arranged on the auxiliary suction pipe (33), and one end of the blocking column (32) away from the movable bottom plate (17) slides and is inserted into the side opening.

10. A new energy gearbox housing leak testing and plugging mechanism according to claim 4, characterized in that: Limiting screws (4) are provided on both sides of the connecting plate (3), and the limiting screws (4) are threadedly connected to the connecting plate (3). A pressure sensing switch (5) electrically connected to the inflation and suction pump (27) is installed at one end of the limiting screw (4) close to the positioning base (1), and the pressure sensing switch (5) is also electrically connected to the hydraulic telescopic rod (2).

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