Oil pan sealing testing equipment

Abstract

This application relates to the field of component testing technology, and in particular to an oil pan sealing performance testing device, including a base and an airtightness testing device. The airtightness testing device includes a fixing component, an inflation component, a support base, and a sliding base. The support base is connected to the surface of the base facing the first testing station, and the sliding base is slidably connected to the surface of the support base. The inflation component includes an inflation pipe, a pressure sensor, and a controller. One end of the inflation pipe is connected to the surface of the sliding base facing the first testing station, and the other end of the inflation pipe can be embedded in the inflation port of the oil pan. The pressure sensor is connected to the inflation pipe near the inner wall of the oil pan. The inflation pipe injects a fixed amount of air into the inner cavity of the oil pan through the inflation port. The arrangement of the fixing component, inflation component, support base, and sliding base in this application enables automated testing of the airtightness of the oil pan's inner cavity, eliminating the need for personnel to use immersion testing to observe whether air bubbles are generated, thereby improving the testing accuracy of the oil pan.

Description

Technical Field

[0001] This application relates to the field of component testing technology, and in particular to an oil pan sealing testing device. Background Technology

[0002] The oil pan, also known as the lower crankcase, is installed at the bottom of the automobile crankcase. It serves to prevent impurities from entering and to collect and store the engine oil that flows back after being lubricated by the various friction pairs of the engine. In the current technology, the sealing performance of the oil pan is mainly tested by immersion testing. This requires workers to use multiple bolts to seal and tighten the oil pan, and then immerse the sealed oil pan in water. Compressed air is then injected into the inner cavity of the oil pan in the water to observe whether there is any leakage.

[0003] Workers need to visually inspect the surface of the oil pan for bubbles. However, visible bubbles are only formed when the leakage reaches a certain threshold. For minor leaks, workers cannot observe them, thus reducing the accuracy of oil pan inspection. Summary of the Invention

[0004] To improve the accuracy of oil pan testing, this application provides an oil pan sealing performance testing device.

[0005] This application provides an oil pan sealing performance testing device, which adopts the following technical solution: An oil pan sealing performance testing device includes a base and an airtightness testing device. The base has a testing station on its surface. The airtightness testing device is connected to the surface of the base facing the testing station. The airtightness testing device includes a fixing component, an inflation component, a support base, and a sliding base. The fixing component is connected to the surface of the base facing the testing station and can confine the oil pan to the testing station. The support base is connected to the surface of the base facing the testing station. The sliding base is slidably connected to the surface of the support base, and the sliding direction of the sliding base is parallel to the height direction of the base. The inflation component includes an inflation pipe, ... The system includes a pressure sensor and a controller. One end of the inflation tube is connected to the surface of the sliding seat facing the first detection station, and the other end of the inflation tube can be embedded in the inflation port of the oil pan. The pressure sensor is connected to the inner wall of the inflation tube near the oil pan. The controller is electrically connected to the pressure sensor. The inflation tube injects a fixed amount of air into the inner cavity of the oil pan through the inflation port. The pressure sensor sends an initial pressure value to the controller. After a set time, the pressure sensor sends a final pressure value to the controller. The controller compares the difference between the initial pressure value and the final pressure value with a preset value to determine whether the airtightness of the inner cavity of the oil pan is qualified.

[0006] By adopting the above technical solution, the oil pan is first placed on the first testing station. The fixing component is activated and the oil pan is confined to the first testing station. The sliding seat slides along the surface of the support seat towards the oil pan. The end of the air inlet pipe is embedded in the air inlet of the oil pan. The air inlet pipe fills the inner cavity of the oil pan with a certain amount of air through the air inlet of the oil pan. The pressure sensor measures the initial pressure value of the inner cavity of the oil pan and sends it to the controller. After waiting for a set time, the pressure sensor measures the final pressure value of the inner cavity of the oil pan again and sends it to the controller. The controller compares the difference between the initial pressure value and the final pressure value with the preset value and determines whether the air tightness of the inner cavity of the oil pan is qualified. This realizes the automated detection of the air tightness of the inner cavity of the oil pan, eliminating the need for personnel to use immersion testing to observe whether air bubbles are generated, thereby improving the detection accuracy of the oil pan.

[0007] Optionally, the airtightness testing device further includes multiple screws, which are rotatably connected to the sliding seat surface at intervals. Each screw corresponds to a threaded hole in the oil pan, and the screw can be screwed and fixed to the inner wall of the threaded hole in the oil pan.

[0008] By adopting the above technical solution, when the fixing component limits the oil pan to the first inspection station, the screw corresponds one-to-one with the threaded hole on the oil pan and is screwed and fixed to the inner wall of the threaded hole on the oil pan. There is no need for the staff to manually screw the bolt into the threaded hole on the oil pan, which improves the inspection efficiency of the oil pan, shortens the inspection cycle of the oil pan, and thus reduces the processing cost of the oil pan.

[0009] Optionally, the fixing assembly includes a sealing ring and a plurality of guide rods. The sealing ring is connected to the surface of the machine base facing the first detection station. The outer circumferential surface of the sealing ring can abut against the inner circumferential wall of the oil pan to form a seal. The plurality of guide rods are connected at intervals to the surface of the machine base facing the first detection station. The rod surfaces of the plurality of guide rods can abut against the outer circumferential wall of the oil pan to form a limit.

[0010] By adopting the above technical solution, when the oil pan is placed on the surface of the machine base facing the first testing station, the outer circumferential surface of the sealing ring abuts against the inner circumferential wall of the oil pan to form a seal, and the surfaces of multiple guide rods abut against the outer circumferential wall of the oil pan to form a limit, making it less likely for the oil pan to shift on the first testing station, thereby improving the stability of the oil pan airtightness test.

[0011] Optionally, the fixing assembly further includes a fixing seat, a fixing cylinder, a fixing connecting rod, and a fixing pressure plate. The fixing seat is connected to the surface of the machine base, and the fixing cylinder is connected to the surface of the machine base facing the fixing seat. The surface of the fixing seat has a sliding hole for the piston rod of the fixing cylinder to slide. The axis of the piston rod of the fixing cylinder is parallel to the height direction of the machine base. One end of the fixing pressure plate is rotatably connected to the piston rod surface of the fixing cylinder, and the other end of the fixing pressure plate faces the surface of the oil pan. One end of the fixing connecting rod is rotatably connected to the surface of the fixing seat, and the other end of the fixing connecting rod is rotatably connected to the surface of the fixing pressure plate. When the piston rod of the fixing cylinder extends, the fixing connecting rod drives the fixing pressure plate to rotate towards the oil pan. The surface of the fixing pressure plate and the surface of the machine base correspond one-to-one to clamp the two sides of the oil pan to form a limit.

[0012] By adopting the above technical solution, when the oil pan is placed on the first testing station, the piston rod of the fixed cylinder extends, and the fixed connecting rod drives the fixed pressure plate to rotate towards the oil pan. The fixed pressure plate surface and the machine base surface correspond one-to-one to clamp the two sides of the oil pan to form a limit, making it difficult for the oil pan to detach from the machine base surface, and further improving the limiting stability of the oil pan on the machine base surface.

[0013] Optionally, the airtightness testing device further includes a sealing assembly, which includes an elastic ring, a clamping ring, an elastic element, and a power ring. The sliding seat has a power cavity on its surface facing one of the screws for the power ring to slide in. The sliding direction of the power ring is parallel to the height direction of the base. The inner wall of the power ring surrounds the outer circumference of the screw. The elastic ring is coaxially fixed to the outer circumference of the inflation tube. The sliding seat has a clamping cavity on its surface facing the inflation tube for the clamping ring to slide in. The sliding direction of the clamping ring is parallel to the height direction of the base. The inner ring of the clamping ring surrounds the outer circumference of the inflation tube. The clamping ring is positioned... On the surface of the elastic ring near the sliding seat, the clamping chamber is connected to the power chamber. The two ends of the elastic element in the elastic direction are connected one-to-one between the clamping ring and the sliding seat. The elastic element has the elastic force to drive the clamping ring to slide away from the elastic ring, and the surface of the power ring tends to be flush with the surface of the screw. When the end of the screw is screwed and fixed to the inner wall of the threaded hole of the oil pan, the surface of the oil pan abuts against the surface of the power ring and pushes the power ring closer to the power chamber. The air in the power chamber enters the clamping chamber and pushes the clamping ring closer to the elastic ring. The surface of the elastic ring and the surface of the oil pan clamp the two sides of the elastic ring to form a seal.

[0014] By adopting the above technical solution, when the end of the screw is screwed and fixed to the inner wall of the threaded hole on the oil pan, the surface of the oil pan abuts against the surface of the power ring and pushes the power ring to slide towards the sliding seat. The air pressure in the power chamber increases, and the air in the power chamber enters the pressing chamber. The air pressure in the pressing chamber increases and pushes the pressing ring to slide along the inner wall of the pressing chamber towards the elastic ring. The surface of the elastic ring and the surface of the oil pan correspond one-to-one to clamp the two sides of the elastic ring to form a seal, making it difficult for the air in the air in the air inlet of the air pipe to escape from the air outlet of the oil pan, thereby improving the accuracy of the oil pan airtightness test.

[0015] Optionally, the airtightness testing device further includes multiple testing motors, which are spaced apart and connected to the surface of the sliding seat away from the screw. Each testing motor corresponds to a screw, and the end of the motor shaft of the testing motor passes through the surface of the sliding seat and is coaxially fixed to the end of the screw. The sealing assembly also includes multiple connecting ropes, multiple elastic elements, and multiple heat dissipation impellers. The multiple heat dissipation impellers are rotatably connected to the surface of the sliding seat at intervals. Each heat dissipation impeller corresponds to a testing motor, and the rotation axis of the heat dissipation impeller is parallel to the height direction of the base. Each connecting rope corresponds to a heat dissipation impeller, with one end of the connecting rope wound around the rotation axis of the heat dissipation impeller and the other end wound around the motor shaft of the testing motor. One end of the elastic element in the elastic direction is connected to the rotation axis of the heat dissipation impeller, and the other end of the elastic element in the elastic direction is connected to the surface of the sliding seat. The elastic element has the elasticity to drive the heat dissipation impeller to rotate, and the connecting rope between the testing motor and the heat dissipation impeller tends to be in a taut state.

[0016] By adopting the above technical solution, when the detection motor rotates in the forward direction, driving the screw to tighten and fix itself to the inner wall of the threaded hole in the oil pan, the connecting rope receives the power of the detection motor and drives the cooling impeller to rotate in the forward direction. When the detection motor rotates in the reverse direction, it drives the end of the screw to disengage from the threaded hole on the oil pan, the tension of the detection motor on the connecting rope disappears, and the elastic force of the elastic element drives the cooling impeller to rotate in the reverse direction. The connecting rope is wrapped around the rotating shaft of the cooling impeller, and the cooling impeller is close to the detection motor. The cooling impeller drives the air around the detection motor to flow, and the air fully contacts the detection motor and exchanges heat, thereby cooling the detection motor.

[0017] Optionally, the outer circumferential surface of the inflation tube is coaxially provided with an installation groove for the inner wall of the elastic ring to be embedded. The sealing assembly also includes a connecting strip, a control plate, a sealing ring, a sliding plate, an elastic element, a sliding rod, and a compression ring. The inner wall of the installation groove is coaxially provided with a compression chamber for the compression ring to slide. The sliding plate is slidably connected to the inner wall of the inflation tube. The sliding plate surface is provided with multiple vent holes at intervals. The inner wall of the compression chamber is provided with a connecting groove for the connecting strip to slide. The connecting groove connects the inner cavity of the inflation tube and the compression chamber. The two ends of the connecting strip are connected one-to-one between the sliding plate and the compression ring. The control plate is connected to the inner wall of the inflation tube. The control plate is located on the side of the sliding plate closer to the oil pan. The sliding rod surface is connected to the surface of the sliding plate facing the control plate. The control panel has a sliding groove for the sliding rod to pass through. The sealing ring is coaxially connected to the outer circumference of the sliding rod. The sealing ring is located on the side of the control panel away from the sliding plate. The two ends of the elastic element three in the elastic direction are connected one-to-one between the sliding plate and the control panel. The elastic element three has the elastic force to drive the sliding plate to slide away from the control panel, and the outer wall of the sealing ring tends to press against the inner wall of the sliding groove and seal the sliding groove. When air enters the inner cavity of the air inlet tube, the air in the air inlet tube enters the sliding groove through the vent and squeezes the sealing ring, pushing the sliding rod to slide towards the oil pan. The sealing effect of the sealing ring on the sliding groove disappears, and the connecting strip receives the power of the sliding plate and pushes the compression ring to squeeze the surface of the elastic ring to form a seal.

[0018] By adopting the above technical solution, when air is filled into the inner cavity of the inflation tube, the air in the inflation tube enters the sliding groove through the vent and squeezes the sealing ring, pushing the sliding rod to slide towards the oil pan. The sealing effect of the sealing ring on the sliding groove disappears, and the air in the inflation tube is stably injected into the inner cavity of the oil pan. At the same time, the connecting strip receives the power of the sliding plate and pushes the extrusion ring to slide towards the elastic ring. The surface of the extrusion ring squeezes the surface of the elastic ring to form a seal, making it difficult for the air in the oil pan to escape from the tight contact between the elastic ring and the outer circumference of the inflation tube, further improving the sealing stability between the inflation tube and the oil pan.

[0019] Optionally, a water leakage detection device is also included. The surface of the base is further provided with a second detection station. The water leakage detection device is connected to the surface of the base facing the second detection station. The water leakage detection device includes a positioning component and a color-developing component. The positioning component is connected to the surface of the base facing the second detection station. The positioning component can limit the oil pan on the second detection station, with the inner cavity of the oil pan facing the surface of the base. The color-developing component is connected to the surface of the base facing the inner cavity of the oil pan. When water is sprayed onto the outer peripheral surface of the oil pan, the color-developing component can absorb the water that seeps into the inner cavity of the oil pan and develop a color.

[0020] By adopting the above technical solution, when the oil pan is placed on the second testing station, the positioning component is activated and the oil pan is limited to the second testing station, with the inner cavity of the oil pan facing the surface of the machine base. The operator holds a spray bottle and sprays water onto the outer periphery of the oil pan. When water seeps into the inner cavity of the oil pan from the cracks on the surface of the oil pan, the color display component can absorb the water seeping into the inner cavity of the oil pan and display it, thus realizing the detection of water leakage on the surface of the oil pan.

[0021] Optionally, the positioning assembly includes a positioning seat, a positioning plate, and a positioning cylinder. The positioning seat is connected to the surface of the machine base facing the second detection station. The surface of the positioning seat has a positioning cavity for accommodating the oil pan. The positioning plate is connected to the surface of the machine base. The positioning cylinder is connected to the surface of the positioning plate away from the positioning seat. The piston rod end of the positioning cylinder passes through the positioning plate and faces the positioning cavity. When the oil pan is embedded in the positioning cavity, the piston rod of the positioning cylinder extends out, and the piston rod surface of the positioning cylinder and the inner wall of the positioning cavity clamp the outer peripheral surface of the oil pan to form a limit.

[0022] By adopting the above technical solution, when the oil pan is placed in the positioning cavity, the piston rod face of the positioning cylinder faces the surface of the oil pan, the piston rod of the positioning cylinder extends, and the piston rod face of the positioning cylinder and the inner wall of the positioning cavity clamp the outer circumference of the oil pan to form a limit, so that the oil pan is not easy to shift on the second detection station, thereby improving the limiting stability of the oil pan on the second detection station.

[0023] Optionally, the color-changing component includes a humidity-sensitive color-changing frame and a sealing ring. The sealing ring is connected to the surface of the base facing the second detection station. The outer circumferential surface of the sealing ring can press against the inner wall of the oil pan to form a seal. The surface of the base facing the inner cavity of the oil pan has a receiving cavity for accommodating the humidity-sensitive color-changing frame. Water seeping into the inner cavity of the oil pan enters the inner cavity of the humidity-sensitive color-changing frame along the surface of the base. The inner wall of the humidity-sensitive color-changing frame changes color when it comes into contact with water.

[0024] By adopting the above technical solution, when the positioning component limits the oil pan to the second detection station, the outer end of the sealing ring presses against the inner circumferential wall of the oil pan to form a seal. The operator sprays water onto the outer circumferential surface of the oil pan with a spray bottle. The water seeps into the inner cavity of the oil pan from the gaps in the oil pan and drips onto the surface of the base. The water enters the inner cavity of the moisture-sensitive color-changing frame along the surface of the base. The inner wall of the moisture-sensitive color-changing frame changes color when it comes into contact with water. The operator only needs to observe whether the inner wall of the moisture-sensitive color-changing frame changes color to obtain the water leakage detection result of the oil pan.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The installation of fixed components, inflation components, support bases, and sliding bases enables automated testing of the airtightness of the oil pan cavity, eliminating the need for personnel to use immersion testing to observe for air bubbles, thereby improving the accuracy of oil pan testing. The screw-on design eliminates the need for manual screwing of bolts into the threaded holes on the oil pan, improving the efficiency of oil pan inspection, shortening the inspection cycle, and thus reducing the processing cost of the oil pan. The sealing ring and guide rod design prevent the oil pan from shifting at the testing station, thereby improving the stability of the oil pan airtightness test. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a partial structural diagram of the base in an embodiment of this application, mainly showing the fixing components.

[0028] Figure 3 This is a schematic diagram of the overall structure of the support base in the embodiments of this application.

[0029] Figure 4 This is a partial cross-sectional view of an embodiment of this application, mainly showing the sealing assembly.

[0030] Figure 5 This is a partial structural diagram of the base in an embodiment of this application, mainly showing the water leakage detection device.

[0031] Explanation of reference numerals in the attached drawings: 1. Base; 11. Receiving cavity; 2. Air tightness detection device; 21. Fixing assembly; 211. Fixing seat; 2111. Sliding hole; 212. Fixing cylinder; 213. Fixing connecting rod; 214. Fixing pressure plate; 215. Sealing ring; 216. Guide rod; 22. Inflation assembly; 221. Inflation pipe; 2211. Mounting groove; 2212. Extrusion chamber; 2213. Connecting groove; 222. Air pump; 223. Pressure sensor; 23. Sealing assembly; 231. Elastic ring; 232. Pressing ring; 233. Elastic element one; 234. Power ring; 235. Connecting strip; 236. Control board; 237. Sealing ring; 238. Sliding plate; 239. Elastic component three; 2310. Sliding rod; 2311. Compression ring; 2312. Connecting rope; 2313. Elastic component two; 2314. Heat dissipation impeller; 2315. Vent hole; 2316. Sliding groove; 24. Support base; 25. Sliding base; 251. Air supply channel; 252. Power chamber; 253. Pressing chamber; 26. Detection motor; 27. Tightening screw; 3. Leakage detection device; 31. Color display component; 311. Humidity-sensitive color-changing frame; 312. Sealing ring; 32. Positioning component; 321. Positioning base; 3211. Positioning chamber; 322. Positioning plate; 323. Positioning cylinder; 324. Sealing rod. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5This application will be described in further detail.

[0033] This application discloses an oil pan sealing performance testing device. (Refer to...) Figure 1 The oil pan sealing performance testing equipment includes a base 1, an airtightness testing device 2, and a leakage testing device 3. The surface of the base 1 is provided with a testing station one and a testing station two at intervals. The airtightness testing device 2 is installed on the surface of the base 1 facing the testing station one, and the airtightness testing device 2 can perform airtightness testing on the inner cavity of the oil pan at the testing station one. The leakage testing device 3 is installed on the surface of the base 1 facing the testing station two, and the leakage testing device 3 can perform leakage testing on the surface of the oil pan at the testing station two. This realizes automatic testing of the oil pan sealing performance, eliminating the need for operators to manually tighten bolts into the threaded holes on the oil pan, improving the testing efficiency of the oil pan, shortening the testing cycle of the oil pan, and thus reducing the processing cost of the oil pan.

[0034] Reference Figure 2 and Figure 3 The airtightness testing device 2 includes a fixing component 21, an inflation component 22, a sealing component 23, a support base 24, a sliding base 25, multiple testing motors 26, and multiple screws 27. The fixing component 21 is installed on the surface of the base 1 facing the first testing station. The fixing component 21 can limit the oil pan to the first testing station. The support base 24 is fixed on the surface of the base 1 facing the first testing station. A cylinder is fixed to the top surface of the support base 24 by bolts. The cylinder piston rod axis is parallel to the height direction of the base 1. The end of the cylinder piston rod passes through the outer wall of the support base 24 and is fixed to the surface of the sliding base 25. The cylinder drives the sliding base 25 to slide on the surface of the support base 24.

[0035] Reference Figure 2 and Figure 3 Multiple screws 27 are rotatably connected at their ends to the surface of the sliding seat 25 facing the first inspection station. Each screw 27 corresponds to a threaded hole in the oil pan at the first inspection station. Multiple inspection motors 26 are fixed at intervals to the surface of the sliding seat 25 away from the screws 27 by bolts. Each inspection motor 26 corresponds to a screw 27. The end of the motor shaft of the inspection motor 26 passes through the sliding seat 25 and is coaxially fixed to the end of the screw 27. The inspection motor 26 drives the screw 27 to rotate and is threadedly tightened and fixed to the inner wall of the threaded hole in the oil pan.

[0036] Reference Figure 2 and Figure 3The fixing component 21 includes a fixing base 211, a fixing cylinder 212, a fixing connecting rod 213, a fixing pressure plate 214, a sealing ring 215, and multiple guide rods 216. The sealing ring 215 can be made of rubber or silicone. In this embodiment, the sealing ring 215 is made of rubber and has a certain deformation capability. The sealing ring 215 is fixed on the surface of the machine base 1 facing the first detection station. The outer peripheral surface of the sealing ring 215 can press against the inner wall of the oil pan to form a seal. The ends of the multiple guide rods 216 are fixed at intervals on the surface of the machine base 1 facing the first detection station. The multiple guide rods 216 surround the outer peripheral surface of the sealing ring 215, and the rod surfaces of the multiple guide rods 216 can abut against the outer wall of the oil pan to form a limit.

[0037] Reference Figure 2 and Figure 3 The fixed seat 211 is fixed to the surface of the base 1 by bolts. The fixed cylinder 212 is fixed to the surface of the base 1 facing the fixed seat 211 by bolts. The piston rod axis of the fixed cylinder 212 is parallel to the height direction of the base 1. The surface of the fixed seat 211 is provided with a sliding hole 2111 for the piston of the fixed cylinder 212 to pass through. One end of the fixed pressure plate 214 is rotatably connected to the end of the piston rod of the fixed cylinder 212 that protrudes from the fixed seat 211. The other end of the fixed pressure plate 214 faces the surface of the oil pan. One end of the fixed connecting rod 213 is rotatably connected to the surface of the fixed seat 211. The other end of the fixed connecting rod 213 is rotatably connected to the plate surface of the fixed pressure plate 214. The rotation axis of the fixed connecting rod 213 is parallel to the rotation axis of the fixed pressure plate 214. The rotation axis of the fixed pressure plate 214 is parallel to the length direction of the base 1.

[0038] Reference Figure 2 and Figure 3 When the oil pan is placed on the first inspection station, and the outer circumferential surface of the sealing ring 215 and the rod surface of the guide rod 216 are pressed against the two sides of the oil pan in the thickness direction to form a seal, the piston rod of the fixed cylinder 212 extends, and the fixed connecting rod 213 drives the fixed pressure plate 214 to rotate towards the oil pan. The plate surface of the fixed pressure plate 214 and the surface of the machine base 1 are clamped on both sides of the oil pan to form a limit, thereby achieving precise positioning of the oil pan on the first inspection station.

[0039] Reference Figure 3 and Figure 4The inflation assembly 22 includes an inflation pipe 221, an air pump 222, a pressure sensor 223, and a controller. One end of the inflation pipe 221 is fixed to the surface of the sliding seat 25 facing the first detection station via a flange. The other end of the inflation pipe 221 can be embedded into the inflation port of the oil pan. The air pump 222 is fixed to the surface of the sliding seat 25 away from the inflation pipe 221 by bolts. The surface of the sliding seat 25 facing the air outlet of the air pump 222 is provided with an air supply channel 251. The air supply channel 251 connects to the inner cavity of the inflation pipe 221. The air pump 222 drives air through the air supply channel 251 and the inner cavity of the inflation pipe 221 to inflate the inner cavity of the oil pan.

[0040] Reference Figure 3 and Figure 4 The pressure sensor 223 is installed on the inner wall of the air filling pipe 221 near the oil pan. The controller is electrically connected to the pressure sensor 223. The air pump 222 fills the inner cavity of the oil pan with a certain amount of air through the air filling pipe 221. The pressure sensor 223 measures the initial pressure value of the inner cavity of the oil pan and sends it to the controller. After waiting for a set time, the pressure sensor 223 measures the final pressure value of the inner cavity of the oil pan again and sends it to the controller. The controller compares the difference between the initial pressure value and the final pressure value with the preset value and determines whether the air tightness of the inner cavity of the oil pan is qualified, thereby realizing the automated detection of the air tightness of the inner cavity of the oil pan.

[0041] Reference Figure 3 and Figure 4 The sealing assembly 23 includes an elastic ring 231, a clamping ring 232, an elastic element 233, a power ring 234, a connecting strip 235, a control plate 236, a sealing ring 237, a sliding plate 238, an elastic element 239, a sliding rod 2310, a compression ring 2311, multiple connecting ropes 2312, multiple elastic elements 2313, and multiple cooling impellers 2314. The multiple cooling impellers 2314 are rotatably connected at intervals to the surface of the sliding seat 25 away from the screw 27. Each cooling impeller 2314 corresponds to a detection motor 26, and the rotation axis of the cooling impeller 2314 is parallel to the axis of the detection motor 26. Each connecting rope 2312 corresponds to a cooling impeller 2314. One end of the connecting rope 2312 is wound around the rotating shaft of the heat dissipation impeller 2314, and the other end of the connecting rope 2312 is wound around the motor shaft of the detection motor 26. The elastic element 2313 can be a tension spring or a coil spring. In this embodiment, the elastic element 2313 is a coil spring, which has a certain deformation capability. One end of the elastic element 2313 in the direction of elastic force is connected to the rotating shaft of the heat dissipation impeller 2314, and the other end of the elastic element 2313 in the direction of elastic force is connected to the surface of the sliding seat 25. The elastic element 2313 has the elastic force to drive the heat dissipation impeller 2314 to rotate. The connecting rope 2312 is wound around the outer circumference of the rotating shaft of the heat dissipation impeller 2314, and the connecting rope 2312 between the detection motor 26 and the heat dissipation impeller 2314 tends to be in a taut state.

[0042] Reference Figure 3 and Figure 4 The elastic ring 231 can be made of rubber or silicone. In this embodiment, the elastic ring 231 is made of rubber, which has a certain deformation capacity. The outer circumferential surface of the air tube 221 is coaxially provided with a mounting groove 2211 for the inner ring of the elastic ring 231 to be embedded. The inner wall of the mounting groove 2211 abuts against the inner wall of the elastic ring 231 to form a seal. The ring surface of the elastic ring 231 can abut against the surface of the oil pan and close the air inlet on the oil pan. The inner wall of the mounting groove 2211 is coaxially provided with a compression groove. The compression chamber 2212 of the ring 2311 slides, the axis of the compression ring 2311 coincides with the axis of the inflation tube 221, the sliding plate 238 is slidably connected to the inner wall of the inflation tube 221, the sliding direction of the sliding plate 238 coincides with the axis of the inflation tube 221, the surface of the sliding plate 238 is provided with a plurality of vent holes 2315 spaced apart, the vent holes 2315 penetrate both ends of the sliding plate 238 in the thickness direction, and the compression chamber 2212 is provided with a connecting strip 23 facing the inner wall of the inner cavity of the inflation tube 221. 5. The sliding connecting groove 2213 is parallel to the axis of the air tube 221, and the connecting groove 2213 connects the inner cavity of the air tube 221 and the extrusion chamber 2212. The two ends of the connecting strip 235 are connected one-to-one between the sliding plate 238 and the extrusion ring 2311. The control plate 236 is fixed to the inner wall of the air tube 221 and is located on the side of the pressure sensor 223 near the sliding plate 238. The sliding rod 2310 is fixed to the sliding plate 238. The plate 238 faces the control plate 236. The control plate 236 has a sliding groove 2316 for the end of the sliding rod 2310 to pass through. The sealing ring 237 can be made of rubber or silicone. In this embodiment, the sealing ring 237 is made of rubber and has a certain deformation capability. The inner wall of the sealing ring 237 is coaxially embedded in the sliding rod 2310 protruding from the end of the control plate 236. The sealing ring 237 is located on the side of the control plate 236 away from the sliding plate 238.

[0043] Reference Figure 3 and Figure 4 The elastic element 239 can be a compression spring or a tension spring. In this embodiment, the elastic element 239 is a compression spring, which has a certain deformation capability. The two ends of the elastic element 239 in the direction of elastic force are connected one-to-one between the sliding plate 238 and the control plate 236. The elastic element 239 has the elastic force to drive the sliding plate 238 to slide away from the control plate 236, and the outer ring wall of the sealing ring 237 abuts against the inner wall of the sliding groove 2316 and closes the sliding groove 2316.

[0044] Reference Figure 3 and Figure 4When the air pump 222 drives air into the inner cavity of the inflation pipe 221, the air in the inflation pipe 221 enters the sliding groove 2316 through the vent 2315 and squeezes the sealing ring 237, pushing the sliding rod 2310 to slide towards the oil pan. The sealing effect of the sealing ring 237 on the sliding groove 2316 disappears, and the air in the inflation pipe 221 is stably injected into the inner cavity of the oil pan. At the same time, the connecting strip 235 receives the power of the sliding plate 238 and pushes the compression ring 2311 to slide towards the elastic ring 231. The circumferential surface of the compression ring 2311 squeezes the surface of the elastic ring 231 to form a seal, making it difficult for the air in the oil pan to escape from the tight contact between the elastic ring 231 and the outer circumference of the inflation pipe 221, further improving the sealing stability between the inflation pipe 221 and the oil pan.

[0045] Reference Figure 3 and Figure 4 The sliding seat 25 has a power cavity 252 on its surface facing one of the screws 27, which allows the power ring 234 to slide. The axis of the power ring 234 coincides with the axis of the screw 27, and the inner wall of the power ring 234 surrounds the outer circumference of the screw 27. The sliding seat 25 has a pressing cavity 253 on its surface facing the air tube 221, which allows the pressing ring 232 to slide. The axis of the pressing ring 232 coincides with the axis of the air tube 221, and the pressing cavity 253 is connected to the power cavity 252. The two ends of the elastic element 233 in the elastic direction are connected one-to-one between the pressing ring 232 and the sliding seat 25. The elastic element 233 has the elastic force to drive the pressing ring 232 to slide away from the elastic ring 231, and the ring surface of the power ring 234 tends to be flush with the end face of the screw 27.

[0046] Reference Figure 3 and Figure 4 When the end of the screw 27 is screwed and fixed to the inner wall of the threaded hole on the oil pan, the surface of the oil pan abuts against the surface of the power ring 234 and pushes the power ring 234 to slide towards the sliding seat 25. The air pressure in the power chamber 252 increases, and the air in the power chamber 252 enters the pressing chamber 253. The air pressure in the pressing chamber 253 increases and pushes the pressing ring to slide along the inner wall of the pressing chamber towards the elastic ring 231. The surface of the elastic ring 231 and the surface of the oil pan clamp the two sides of the elastic ring 231 to form a seal, so that the air in the air in the air inlet pipe 221 is not easy to escape from the air outlet of the oil pan, thereby improving the accuracy of the oil pan air tightness test.

[0047] Reference Figure 1 and Figure 5The leakage detection device 3 includes a positioning component 32 and a colorimetric component 31. The positioning component 32 is installed on the surface of the base 1 facing the second detection station. The positioning component 32 can limit the oil pan on the second detection station. The positioning component 32 includes a positioning seat 321, a positioning plate 322, a positioning cylinder 323 and multiple sealing rods 324. The positioning seat 321 is fixed to the surface of the base 1 facing the second detection station by bolts. The surface of the positioning seat 321 has a positioning cavity 3211 for accommodating the oil pan. The positioning plate 322 is fixed to the surface of the base 1 by bolts. The positioning cylinder 323 is fixed to the surface of the positioning plate 322 away from the positioning seat 321 by bolts. The piston rod axis of the positioning cylinder 323 is parallel to the width direction of the base 1. The end of the piston rod of the positioning cylinder 323 can pass through the positioning plate 322 and face the positioning cavity 3211. The sealing rod 324 can be made of rubber or silicone. In this embodiment, the sealing rod 324 is made of rubber and has a certain deformation capability.

[0048] Reference Figure 1 and Figure 5 Multiple sealing rods 324 are fixed at their ends on the surface of the base 1 at intervals. Each sealing rod 324 corresponds to a threaded hole on the oil pan. The ends of the sealing rods 324 can be embedded in the threaded holes on the oil pan, and the outer circumferential surface of the sealing rods 324 abuts against the inner wall of the threaded holes on the oil pan to form a seal.

[0049] Reference Figure 1 and Figure 5 When the oil pan is embedded in the positioning cavity 3211, the sealing rod 324 corresponds to and is embedded in the threaded hole on the oil pan. The outer circumferential surface of the sealing rod 324 abuts against the inner wall of the threaded hole on the oil pan to form a seal. At the same time, the piston rod of the positioning cylinder 323 extends out, and the piston rod surface of the positioning cylinder 323 and the inner wall of the positioning cavity 3211 clamp the outer circumferential surface of the oil pan to form a limit.

[0050] Reference Figure 1 and Figure 5When a worker sprays water onto the outer surface of the oil pan at testing station two, the color-developing component 31 absorbs the water seeping into the inner cavity of the oil pan and develops a color, thus completing the leak detection of the oil pan. The color-developing component 31 includes a moisture-sensitive color-changing frame 311 and a sealing ring 312. The sealing ring 312 can be made of rubber or silicone. In this embodiment, the sealing ring 312 is made of rubber, which has a certain deformation capacity. The sealing ring 312 is fixed to the surface of the base 1 facing testing station two, and the outer surface of the sealing ring 312 can press against the oil pan. The inner wall of the bottom shell is sealed. In this embodiment, the moisture-sensitive color-changing frame 311 is made of moisture-sensitive color-changing material. The number of moisture-sensitive color-changing frames 311 can be one, two or more. In this embodiment, the number of moisture-sensitive color-changing frames 311 is two. Two receiving cavities 11 are opened at intervals on the surface of the base 1 facing the inner cavity of the oil pan to accommodate the moisture-sensitive color-changing frames 311. Water seeping into the inner cavity of the oil pan enters the inner cavity of the moisture-sensitive color-changing frame 311 along the surface of the base 1. The inner wall of the moisture-sensitive color-changing frame 311 changes color when it comes into contact with water, thus completing the water leakage detection of the oil pan.

[0051] The implementation principle of an oil pan sealing performance testing device according to an embodiment of this application is as follows: The oil pan is first placed on the testing station one. The air pump 222 injects a certain amount of air into the inner cavity of the oil pan through the air filling pipe 221. The pressure sensor 223 measures the initial pressure value of the inner cavity of the oil pan and sends it to the controller. After waiting for a set time, the pressure sensor 223 measures the final pressure value of the inner cavity of the oil pan again and sends it to the controller. The controller compares the difference between the initial pressure value and the final pressure value with a preset value and determines whether the airtightness of the inner cavity of the oil pan is qualified, thereby realizing the automated detection of the airtightness of the inner cavity of the oil pan. Then, the oil pan is... The oil pan is placed on the second inspection station. The positioning component 32 is activated and limits the oil pan to the second inspection station, with the inner cavity of the oil pan facing the surface of the base 1. The operator sprays water onto the outer circumference of the oil pan with a spray bottle. When water seeps into the inner cavity of the oil pan from the cracks on the surface of the oil pan, the color display component 31 can absorb the water seeping into the inner cavity of the oil pan and display it, realizing the water leakage detection on the surface of the oil pan and completing the automatic detection of the oil pan's sealing performance. There is no need for the operator to manually tighten the bolts into the threaded holes on the oil pan, which improves the inspection efficiency of the oil pan, shortens the inspection cycle of the oil pan, and thus reduces the processing cost of the oil pan.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oil sump leak detection apparatus, characterized by: The device includes a base (1) and an airtightness testing device (2). The base (1) has a testing station on its surface. The airtightness testing device (2) is connected to the surface of the base (1) facing the testing station. The airtightness testing device (2) includes a fixing component (21), an inflation component (22), a support base (24), and a sliding base (25). The fixing component (21) is connected to the surface of the base (1) facing the testing station and can confine the oil pan to the testing station. The support base (24) is connected to the surface of the base (1) facing the testing station. The sliding base (25) is slidably connected to the surface of the support base (24), and the sliding direction of the sliding base (25) is parallel to the height direction of the base (1). The inflation component (22) includes an inflation component. The system includes a tube (221), a pressure sensor (223), and a controller. One end of the air filling tube (221) is connected to the surface of the sliding seat (25) facing the first detection station. The other end of the air filling tube (221) can be embedded in the air filling port of the oil pan. The pressure sensor (223) is connected to the inner wall of the air filling tube (221) near the oil pan. The controller is electrically connected to the pressure sensor (223). The air filling tube (221) fills a certain amount of air into the inner cavity of the oil pan through the air filling port of the oil pan. The pressure sensor (223) sends the initial pressure value to the controller. After waiting for a set time, the pressure sensor (223) sends the final pressure value to the controller. The controller compares the difference between the initial pressure value and the final pressure value with a preset value to determine whether the air tightness of the inner cavity of the oil pan is qualified.

2. The oil pan tightness detection apparatus according to claim 1, characterized by: The airtightness testing device also includes a plurality of screws (27), which are rotatably connected at intervals to the surface of the sliding seat (25). Each screw (27) corresponds to a threaded hole in the oil pan, and the screw (27) can be screwed and fixed to the inner wall of the threaded hole in the oil pan.

3. The oil pan sealing performance testing equipment according to claim 1, characterized in that: The fixing component (21) includes a sealing ring (215) and a plurality of guide rods (216). The sealing ring (215) is connected to the surface of the base (1) facing the first detection station. The outer circumferential surface of the sealing ring (215) can abut against the inner circumferential wall of the oil pan to form a seal. The plurality of guide rods (216) are connected at intervals to the surface of the base (1) facing the first detection station. The rod surfaces of the plurality of guide rods (216) can abut against the outer circumferential wall of the oil pan to form a limit.

4. The oil pan sealing performance testing equipment according to claim 3, characterized in that: The fixing assembly (21) further includes a fixing seat (211), a fixing cylinder (212), a fixing connecting rod (213), and a fixing pressure plate (214). The fixing seat (211) is connected to the surface of the machine base (1), and the fixing cylinder (212) is connected to the surface of the machine base (1) facing the fixing seat (211). The surface of the fixing seat (211) is provided with a sliding hole (2111) for sliding the piston rod of the fixing cylinder (212). The axis of the piston rod of the fixing cylinder (212) is parallel to the height direction of the machine base (1). One end of the fixing pressure plate (214) The piston rod of the fixed cylinder (212) is rotatably connected to the piston rod surface. The other end of the fixed pressure plate (214) faces the surface of the oil pan. One end of the fixed connecting rod (213) is rotatably connected to the surface of the fixed seat (211), and the other end of the fixed connecting rod (213) is rotatably connected to the plate surface of the fixed pressure plate (214). When the piston rod of the fixed cylinder (212) extends, the fixed connecting rod (213) drives the fixed pressure plate (214) to rotate towards the oil pan. The plate surface of the fixed pressure plate (214) and the surface of the machine base (1) clamp the two sides of the oil pan to form a limit.

5. The oil pan sealing performance testing equipment according to claim 2, characterized in that: The airtightness testing device (2) further includes a sealing assembly (23), which includes an elastic ring (231), a clamping ring (232), an elastic element (233), and a power ring (234). The sliding seat (25) has a power cavity (252) on its surface facing one of the screws (27) for the power ring (234) to slide. The sliding direction of the power ring (234) is parallel to the height direction of the base (1). (234) The inner ring wall surrounds the outer circumference of the screw (27), the elastic ring (231) is coaxially fixed to the outer circumference of the air tube (221), the sliding seat (25) has a pressing cavity (253) on the surface facing the air tube (221) for the pressing ring (232) to slide, the sliding direction of the pressing ring (232) is parallel to the height direction of the machine base (1), the inner ring of the pressing ring (232) surrounds the outer circumference of the air tube (221), the pressing ring (234) is coaxially fixed to the outer circumference of the air tube (221), the inner ring wall of the pressing ring (234) surrounds the outer circumference of the screw (27), the elastic ring (231) is coaxially fixed to the outer circumference of the air tube (221), the inner ring wall of the pressing ring (234) surrounds the outer circumference of the screw (27), the elastic ring (231) is coaxially fixed to the outer circumference of the air tube (221), the inner ring wall of the pressing ring (234) surrounds the outer circumference of the screw (27), the inner ring wall of the pressing ring (234) surrounds ...7), the inner ring wall of the pressing ring (234) surrounds the outer circumference of the screw (27), the inner ring wall of the pressing ring (234) surrounds the outer circum 32) Located on the surface of the elastic ring (231) near the sliding seat (25), the clamping cavity (253) is connected to the power cavity (252). The two ends of the elastic element (233) in the elastic direction are connected one-to-one between the clamping ring (232) and the sliding seat (25). The elastic element (233) has the elastic force to drive the clamping ring (232) to slide away from the elastic ring (231), and the ring surface of the power ring (234) is flush with the rod surface of the screw (27). As the trend continues, when the end of the screw (27) is screwed and fixed to the inner wall of the threaded hole of the oil pan, the surface of the oil pan abuts against the ring surface of the power ring (234) and pushes the power ring (234) closer to the power chamber (252). The air in the power chamber (252) enters the pressing chamber (253) and pushes the pressing ring (232) closer to the elastic ring (231). The ring surface of the elastic ring (231) and the surface of the oil pan clamp the two sides of the elastic ring (231) to form a seal.

6. The oil pan sealing performance testing equipment according to claim 5, characterized in that: The airtightness testing device (2) further includes multiple testing motors (26), which are spaced apart and connected to the surface of the sliding seat (25) away from the screw (27). Each testing motor (26) corresponds to a screw (27). The end of the motor shaft of each testing motor (26) passes through the surface of the sliding seat (25) and is coaxially fixed to the end of the screw (27). The sealing assembly (23) further includes multiple connecting ropes (2312), multiple elastic elements (2313), and multiple heat dissipation impellers (2314). Each heat dissipation impeller (2314) is rotatably connected to the surface of the sliding seat (25) at intervals. Each heat dissipation impeller (2314) corresponds to a testing motor (26). The heat dissipation impeller (2314) rotates... The axis of motion and the height direction of the base (1) are parallel to each other. The connecting rope (2312) corresponds one-to-one with the heat dissipation impeller (2314). One end of the connecting rope (2312) is wrapped around the rotating shaft of the heat dissipation impeller (2314), and the other end of the connecting rope (2312) is wrapped around the motor shaft of the detection motor (26). One end of the elastic element (2313) in the elastic direction is connected to the rotating shaft of the heat dissipation impeller (2314), and the other end of the elastic element (2313) in the elastic direction is connected to the surface of the sliding seat (25). The elastic element (2313) has the elasticity to drive the heat dissipation impeller (2314) to rotate, and the connecting rope (2312) between the detection motor (26) and the heat dissipation impeller (2314) tends to be in a taut state.

7. The oil pan sealing performance testing equipment according to claim 5, characterized in that: The outer circumference of the inflation tube (221) is coaxially provided with an installation groove (2211) for embedding the inner wall of the elastic ring (231). The sealing assembly (23) also includes a connecting strip (235), a control plate (236), a sealing ring (237), a sliding plate (238), an elastic element (239), a sliding rod (2310), and a compression ring (2311). The inner wall of the installation groove (2211) is coaxially provided with a compression cavity (2212) for sliding of the compression ring (2311). The sliding plate (238) is slidably connected to the inner wall of the inflation tube (221), and the surface of the sliding plate (238) is spaced apart with... Multiple vent holes (2315) are provided. The inner wall of the extrusion chamber (2212) is provided with a connecting groove (2213) for the connecting strip (235) to slide. The connecting groove (2213) connects the inner cavity of the air tube (221) and the extrusion chamber (2212). The two ends of the connecting strip (235) are connected one-to-one between the sliding plate (238) and the extrusion ring (2311). The control plate (236) is connected to the inner wall of the air tube (221). The control plate (236) is located on the side of the sliding plate (238) near the oil pan. The rod surface of the sliding rod (2310) is connected to the sliding plate (238) facing the control plate. The control plate (236) has a sliding groove (2316) for the sliding rod (2310) to pass through. The sealing ring (237) is coaxially connected to the outer circumferential surface of the sliding rod (2310). The sealing ring (237) is located on the side of the control plate (236) away from the sliding plate (238). The two ends of the elastic element three (239) in the elastic direction are connected one-to-one between the sliding plate (238) and the control plate (236). The elastic element three (239) has the elasticity to drive the sliding plate (238) to slide away from the control plate (236), and the sealing ring (237) The outer ring wall presses against the inner wall of the sliding groove (2316) and seals the sliding groove (2316). When air enters the inner cavity of the air inlet pipe (221), the air in the air inlet pipe (221) enters the sliding groove (2316) through the vent (2315) and squeezes the sealing ring (237), pushing the sliding rod (2310) to slide towards the oil pan. The sealing effect of the sealing ring (237) on the sliding groove (2316) disappears, and the connecting strip (235) receives the power of the sliding plate (238) and pushes the extrusion ring (2311) to extrude the surface of the elastic ring (231) to form a seal.

8. The oil pan sealing performance testing equipment according to claim 1, characterized in that: It also includes a water leakage detection device (3), and the surface of the base (1) is also provided with a second detection station. The water leakage detection device (3) is connected to the surface of the base (1) facing the second detection station. The water leakage detection device (3) includes a positioning component (32) and a color-developing component (31). The positioning component (32) is connected to the surface of the base (1) facing the second detection station. The positioning component (32) can limit the oil pan on the second detection station, and the inner cavity of the oil pan faces the surface of the base (1). The color-developing component (31) is connected to the surface of the base (1) facing the inner cavity of the oil pan. When water is sprayed onto the outer peripheral surface of the oil pan, the color-developing component (31) can absorb the water that seeps into the inner cavity of the oil pan and develop a color.

9. The oil pan sealing performance testing device according to claim 8, characterized in that: The positioning component (32) includes a positioning seat (321), a positioning plate (322), and a positioning cylinder (323). The positioning seat (321) is connected to the surface of the machine base (1) facing the second detection station. The surface of the positioning seat (321) has a positioning cavity (3211) for accommodating the oil pan. The positioning plate (322) is connected to the surface of the machine base (1). The positioning cylinder (323) is connected to the surface of the positioning plate (322) away from the positioning seat (321). The piston rod end of the positioning cylinder (323) passes through the positioning plate (322) and faces the positioning cavity (3211). When the oil pan is embedded in the positioning cavity (3211), the piston rod of the positioning cylinder (323) extends out. The piston rod surface of the positioning cylinder (323) and the inner wall of the positioning cavity (3211) clamp the outer peripheral surface of the oil pan to form a limit.

10. The oil pan sealing performance testing device according to claim 8, characterized in that: The color-changing component (31) includes a humidity-sensitive color-changing frame (311) and a sealing ring (312). The sealing ring (312) is connected to the surface of the base (1) facing the second detection station. The outer circumferential surface of the sealing ring (312) can press against the inner wall of the oil pan to form a seal. The surface of the base (1) facing the inner cavity of the oil pan has a receiving cavity (11) for accommodating the humidity-sensitive color-changing frame (311). Water seeping into the inner cavity of the oil pan enters the inner cavity of the humidity-sensitive color-changing frame (311) along the surface of the base (1). The inner wall of the humidity-sensitive color-changing frame (311) changes color when it comes into contact with water.

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