An internal combustion engine parts air tightness detection device

Abstract

The present invention relates to the technical field of internal combustion engine parts detection, specifically to an internal combustion engine parts air tightness detection device, comprising an external component group, an internal clamping and fixing component group and a bubble detection component group arranged outside the oil pan body, the internal clamping and fixing component group being installed inside the external component group, and the internal clamping and fixing component group being used to fix the oil pan body to the external component group. The present invention uses mechanical capture and numbering indication to automatically prompt the leakage point, reduces the visual fatigue caused by the operator observing the bubbles for a long time, greatly improves the accuracy of the detection, and at the same time, through the extended position of the number, the damaged point can be quickly located, reducing the time of manual investigation and repeated detection.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engine parts detection, in particular to an internal combustion engine parts air tightness detection device. Background Art

[0002] The internal combustion engine accessories include the oil pan of the internal combustion engine. The oil pan is installed at the lower part of the lower crankcase. The oil pan is a basin-shaped structure made of metal casting and installed at the bottom of the engine cylinder block. It is mainly responsible for collecting the oil flowing down from the engine lubrication system and storing it in it, waiting for the oil pump to send it into the engine again for lubrication circulation. Since the main function of the oil pan is to store and circulate the engine lubricating oil, its sealing performance directly affects the normal operation of the engine. If the oil pan has airtight defects, such as tiny cracks or pores, it may cause oil leakage, which in turn causes problems such as insufficient lubrication. Therefore, after the casting of the internal combustion engine oil pan is completed, an airtightness test will be carried out to ensure its reliability.

[0003] At present, the air tightness test of the oil pan is often carried out by water immersion test. First, the seal is installed on the oil pan, and then gas is injected into the oil pan. By observing whether there are bubbles coming out from the surface of the oil pan under pressurized conditions, it can be determined whether there is a leak. However, the way human eyes observe bubbles, in large-scale testing work and in large-scale production environments, operators need to focus on observing bubbles for a long time. Since the oil pan may produce extremely small or extremely slow bubbles in water, inspectors must carefully observe every area of ​​the oil pan. This high-intensity visual work can easily lead to visual fatigue. When fatigue accumulates, the operator's attention and acuity will decrease, making it difficult to maintain long-term high-precision detection. It is easy to miss small bubbles or misjudge other visual interference as bubbles. When bubbles are detected, it is impossible to make a more accurate judgment on the specific location of the oil pan damage. Therefore, it is necessary to repeatedly detect and find the specific location in order to troubleshoot and analyze the equipment for producing the oil pan and improve the subsequent production quality. Summary of the invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide an internal combustion engine parts air tightness detection device to solve the problem of inconvenience in bubble observation in the existing water immersion method for detecting the oil pan of the internal combustion engine mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an internal combustion engine accessory air tightness detection device, comprising an oil pan main body, the outside of the oil pan main body is provided with an external component group, an internal clamping and fixing component group and a bubble detection component group, the internal clamping and fixing component group is installed inside the external component group, the internal clamping and fixing component group is used to fix the oil pan main body to the external component group, the bubble detection component group is used to detect bubbles, the external component group comprises a main frame, the outside of the main frame is provided with a slot box, the inside of the main frame is connected with a rubber sealing sheet, the side of the main frame is provided with a liquid inlet valve, the bottom of the main frame is provided with a liquid discharge valve, and the side of the main frame is provided with an air inlet valve; the internal clamping and fixing component group comprises a waterproof electric telescopic rod, the working end of the waterproof electric telescopic rod is connected with a lower shell, the lower shell is connected with an upper shell, the side of the waterproof electric telescopic rod is provided with an inner guide frame, the inside of the lower shell is provided with a waterproof servo motor, the working end of the waterproof servo motor is connected with a lower shell, the upper shell is connected with an upper shell, the side of the waterproof electric telescopic rod is provided with an inner guide frame, the inside of the lower shell is provided with a waterproof servo motor, the working end of the waterproof servo motor is provided with a lower shell, the working end of the waterproof electric telescopic rod is provided ... provided with an upper shell, the side of the waterproof electric telescopic rod is provided with an inner guide frame, the inside of the lower shell is provided with a waterproof servo motor, the working end of the waterproof servo motor is provided with a lower shell, the working end of the waterproof electric The working end is connected with a large synchronous gear, the large synchronous gear is meshed with a synchronous belt, the synchronous belt is meshed with a small synchronous gear, the small synchronous gear is connected with a sleeve part through a through hole, the sleeve part is connected with a screw rod 1 through a nut pair, one end of the screw rod 1 is connected with a support pad, the support pad is connected with an inner guide rod, the side of the upper shell is connected with an inner frame, and the inner frame is connected with a vertical threaded rod through a thread; the bubble detection component group is provided with an external hydraulic telescopic rod, the working end of the external hydraulic telescopic rod is connected with a mobile rear frame, the side of the mobile rear frame is in sliding contact with a vertical guide rail, the other side of the mobile rear frame is connected with a cover plate frame, the bottom of the cover plate frame is connected with a servo motor part through a mounting frame, the working end of the servo motor part is connected with a screw rod 2, the screw rod 2 is connected with a return plate through a nut pair, an air collecting box is provided inside the cover plate frame, the top of the air collecting box is connected with a stainless steel cylinder, a piston part and a position indicating rod are provided inside the stainless steel cylinder, and a side air pipe part is connected to the side of the stainless steel cylinder.

[0006] Preferably: the trough box is made of stainless steel, the shape of the trough box is a rectangular combination that is wide at the top and narrow at the bottom, the top of the trough box is provided with an opening, the main frame is composed of multiple aluminum alloys through welding, the main frame is supported on the ground, the trough box is welded to the main frame, the liquid inlet valve is connected to the water inlet pipe, the liquid discharge valve is connected to the drain pipe, and the air inlet valve is installed on the side of the trough box opposite to the liquid inlet valve.

[0007] Preferably: two waterproof electric telescopic rods are provided, and the two waterproof electric telescopic rods are installed in the slot box, the top of the lower shell is provided with an opening, the waterproof servo motor is connected to the bottom of the upper shell through a mounting frame, the small synchronous gear, sleeve member, screw rod 1, support pad and inner guide rod are provided in three groups, and the three groups of small synchronous gears, sleeve members, screw rod 1 and inner guide rod are evenly distributed in the upper shell, and the support pad is located outside the upper shell.

[0008] Preferably: the upper shell is provided with grooves at positions corresponding to the synchronous belt, the small synchronous gear and the large synchronous gear, and the upper shell does not contact the synchronous belt, the small synchronous gear and the large synchronous gear through the grooves, the upper shell is connected through bearings and sleeves, one end of the inner guide rod is connected to the support pad, the inner guide rod is in sliding contact with the upper shell through a through hole, the support pad is used to contact the side of the inner wall of the oil pan body, one end of the vertical threaded rod is connected to the adjusting button, and the other end of the vertical threaded rod is connected to a gasket.

[0009] Preferably: the vertical threaded rod contacts the top of the inner wall of the oil pan body through a gasket, and each group of the screw rod 1, the support pad and the inner guide rod is provided with two, and the two screw rods 1, the support pad and the inner guide rod are symmetrically distributed on both sides of the sleeve.

[0010] Preferably, the inner guide frame is in sliding contact with the lower shell through a sliding groove, and the bottom of the inner guide frame is connected to the inner wall of the slot box.

[0011] Preferably: two external hydraulic telescopic rods are provided, the two external hydraulic telescopic rods are installed on the main frame, the vertical guide rail is installed on the main frame, the working end of the servo motor component is connected to the cover frame through a bearing, a guide rod is provided on the side of the second screw rod, and one end of the guide rod is connected to the cover frame, and the guide rod is in sliding contact with the return plate through a through hole.

[0012] Preferably: there are multiple gas collecting boxes, stainless steel cylinders, piston parts and position indicating rods, and the multiple gas collecting boxes, stainless steel cylinders, piston parts and position indicating rods are arranged in a row inside the cover frame, the multiple gas collecting boxes are connected to each other, the cover frame is connected to the gas collecting boxes through through grooves, the bottom and top of the gas collecting boxes are provided with openings, and the bottom opening of the gas collecting box is square, and the top opening of the gas collecting box is circular, one end of the stainless steel cylinder contacts the return plate, the stainless steel cylinder slides in contact with the position indicating rod through the hole, one end of the position indicating rod is connected to the piston part, the other end of the position indicating rod passes through the hole of the stainless steel cylinder and contacts the return plate, the piston part slides in contact with the stainless steel cylinder, and an O-ring is installed on the piston part, and the bottom of the cover frame contacts the top of the slot box.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Compared with the traditional water immersion method that relies on manual observation of bubbles, this device automatically indicates the leakage point through mechanical capture and number indication, which reduces the visual fatigue caused by the operator observing bubbles for a long time, greatly improves the accuracy of detection, and can subsequently find the more accurate location of the oil pan body damage point at the corresponding position according to the extended number, reducing the time for manual investigation and repeated detection;

[0015] 2. The clamping can be adaptively adjusted according to oil pans of different sizes and shapes, and the rubber sealing sheet has a large area. The main body of the oil pan is moved downward by the internal clamping and fixing component group, which can directly complete the sealing, avoiding the need for customized seals for each model and enhancing the versatility and flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the overall front side of the present invention;

[0017] Figure 2 It is a schematic structural diagram of the overall back side of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the overall transverse section of the present invention;

[0019] Figure 4 It is a schematic structural diagram of the overall longitudinal section of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the present invention when performing air tightness detection;

[0021] Figure 6 It is a schematic structural diagram of the inner clamping and fixing component group and the main part of the oil pan of the present invention;

[0022] Figure 7 It is a schematic structural diagram of the inner clamping and fixing component group and the bottom part of the oil pan body of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the inner clamping and fixing component assembly of the present invention;

[0024] Fig. 9 It is a schematic structural diagram of the internal part of the upper shell of the present invention;

[0025] Fig.10 It is a schematic structural diagram of the bottom part of the upper shell of the present invention;

[0026] Fig.11 It is a structural schematic diagram of the bubble detection component group of the present invention;

[0027] Fig.12 It is a schematic cross-sectional view of the stainless steel cylinder and the gas collecting box of the present invention.

[0028] In the figure: 01, oil pan body; 02, external parts group; 21, main frame; 22, tank box; 23, rubber sealing sheet; 24, liquid inlet valve; 25, liquid discharge valve; 26, air inlet valve; 03, internal clamping and fixing parts group; 31, waterproof electric telescopic rod; 32, lower shell; 33, upper shell; 34, inner guide frame; 35, waterproof servo motor; 36, large synchronous gear; 37, synchronous belt; 38, small synchronous gear; 39, sleeve Parts; 310, screw rod one; 311, support pad; 312, inner guide rod; 313, inner frame; 314, vertical threaded rod; 04, bubble detection component group; 41, external hydraulic telescopic rod; 42, mobile rear frame; 43, vertical guide rail; 44, cover frame; 45, servo motor part; 46, screw rod two; 47, return plate; 48, air collecting box; 49, stainless steel cylinder; 410, piston part; 411, position indicating rod; 412, side air pipe part. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-12The present invention provides an embodiment: an internal combustion engine accessory air tightness detection device, comprising an oil pan body 01, the oil pan body 01 is provided with an outer component group 02, an inner clamping component group 03 and a bubble detection component group 04 on the outside, the inner clamping component group 03 is installed inside the outer component group 02, the inner clamping component group 03 is used to fix the oil pan body 01 to the outer component group 02, the bubble detection component group 04 is used to detect bubbles, the outer component group 02 comprises a main frame 21, the outer part of the main frame 21 is provided with a slot box 22, the inner part of the main frame 21 A rubber sealing sheet 23 is connected, a liquid inlet valve 24 is installed on the side of the main frame 21, a liquid discharge valve 25 is installed at the bottom of the main frame 21, and an air inlet valve 26 is installed on the side of the main frame 21; the inner clamping and fixing component group 03 includes a waterproof electric telescopic rod 31, the working end of the waterproof electric telescopic rod 31 is connected to a lower shell 32, the lower shell 32 is connected to an upper shell 33, an inner guide frame 34 is arranged on the side of the waterproof electric telescopic rod 31, a waterproof servo motor 35 is arranged inside the lower shell 32, and the working end of the waterproof servo motor 35 is connected to a large synchronous gear 36 The large synchronous gear 36 is meshed with a synchronous belt 37, the synchronous belt 37 is meshed with a small synchronous gear 38, the small synchronous gear 38 is connected with a sleeve member 39 through a through hole, the sleeve member 39 is connected with a screw rod 310 through a nut pair, one end of the screw rod 310 is connected with a support pad 311, the support pad 311 is connected with an inner guide rod 312, the side of the upper shell 33 is connected with an inner frame 313, and the inner frame 313 is connected with a vertical threaded rod 314 through a thread; the bubble detection component group 04 is provided with an external hydraulic telescopic rod 41, and the working end of the external hydraulic telescopic rod 41 is connected to the mobile rear frame 42, the side of the movable rear frame 42 is in sliding contact with a vertical guide rail 43, the other side of the movable rear frame 42 is connected to a cover frame 44, the bottom of the cover frame 44 is connected to a servo motor component 45 through a mounting frame, the working end of the servo motor component 45 is connected to a screw rod 46, the screw rod 46 is connected to a return plate 47 through a nut pair, an air collecting box 48 is arranged inside the cover frame 44, the top of the air collecting box 48 is connected to a stainless steel cylinder 49, the interior of the stainless steel cylinder 49 is provided with a piston component 410 and a position indicating rod 411, and the side of the stainless steel cylinder 49 is connected to a side air pipe component 412.

[0031] The trough box 22 is made of stainless steel. The shape of the trough box 22 is a rectangular combination that is wide at the top and narrow at the bottom. An opening is set at the top of the trough box 22. The main frame 21 is composed of multiple aluminum alloys through welding. The main frame 21 is supported on the ground. The trough box 22 is welded to the main frame 21. The liquid inlet valve 24 is connected to the water inlet pipe, the liquid discharge valve 25 is connected to the drain pipe, and the air intake valve 26 is installed on the side of the trough box 22 opposite to the liquid inlet valve 24.

[0032] Two waterproof electric telescopic rods 31 are provided, and the two waterproof electric telescopic rods 31 are installed in the slot box 22. An opening is provided at the top of the lower shell 32. The waterproof servo motor 35 is connected to the bottom of the upper shell 33 through the mounting frame. Three groups of small synchronous gears 38, sleeve members 39, screw rod 1 310, support pads 311 and inner guide rods 312 are provided, and the three groups of small synchronous gears 38, sleeve members 39, screw rod 1 310 and inner guide rods 312 are evenly distributed in the upper shell 33, and the support pads 311 are located outside the upper shell 33.

[0033] The upper shell 33 is provided with grooves at positions corresponding to the synchronous belt 37, the small synchronous gear 38 and the large synchronous gear 36, and the upper shell 33 does not contact the synchronous belt 37, the small synchronous gear 38 and the large synchronous gear 36 through the grooves. The upper shell 33 is connected through a bearing and a sleeve member 39, one end of the inner guide rod 312 is connected to the support pad 311, and the inner guide rod 312 is in sliding contact with the upper shell 33 through a through hole. The support pad 311 is used to contact the side of the inner wall of the oil pan body 01, one end of the vertical threaded rod 314 is connected to the adjusting button, and the other end of the vertical threaded rod 314 is connected to a gasket.

[0034] The vertical threaded rod 314 contacts the top of the inner wall of the oil pan body 01 through a gasket. Each set of screw rod 1 310 , support pad 311 and inner guide rod 312 is provided with two, and the two screw rods 1 310 , support pad 311 and inner guide rod 312 are symmetrically distributed on both sides of the sleeve member 39 .

[0035] The inner guide frame 34 is in sliding contact with the lower shell 32 via the slide groove, and the bottom of the inner guide frame 34 is connected to the inner wall of the slot box 22 .

[0036] Two external hydraulic telescopic rods 41 are provided, and the two external hydraulic telescopic rods 41 are installed on the main frame 21. The vertical guide rail 43 is installed on the main frame 21. The working end of the servo motor component 45 is connected to the cover frame 44 through a bearing. A guide rod is provided on the side of the screw rod 46, and one end of the guide rod is connected to the cover frame 44. The guide rod is in sliding contact with the return plate 47 through a through hole. One end of the side air pipe component 412 is connected to the stainless steel cylinder 49, and the other ends of the multiple side air pipe components 412 are inserted into a gas collecting bottle through a small air valve, and a large air valve is installed on the gas collecting bottle.

[0037] A plurality of gas collecting boxes 48, stainless steel cylinders 49, pistons 410 and indicating rods 411 are provided, and the plurality of gas collecting boxes 48, stainless steel cylinders 49, pistons 410 and indicating rods 411 are arranged in a row inside the cover frame 44, the plurality of gas collecting boxes 48 are connected to each other, the cover frame 44 is connected to the gas collecting boxes 48 through a through groove, the bottom and top of the gas collecting box 48 are provided with openings, and the bottom opening of the gas collecting box 48 is square, and the top opening of the gas collecting box 48 is circular, one end of the stainless steel cylinder 49 contacts the return plate 47, and the stainless steel cylinder 49 contacts the indicating rod 411 through a hole. One end of the indicating rod 411 is connected to the piston member 410, and the other end of the indicating rod 411 passes through the hole of the stainless steel cylinder 49 and contacts the return plate 47. The piston member 410 slides in contact with the stainless steel cylinder 49, and an O-ring is installed on the piston member 410. The bottom of the cover frame 44 contacts the top of the tank box 22. A sealing strip is installed on the bottom of the cover frame 44. The square opening of the air collecting box 48 is lower than the bottom surface of the cover frame 44. When the cover frame 44 covers the tank box 22, the air collecting box 48 will be inserted into the water inside the tank box 22. Multiple indicating rods 411 are provided with unique numbers.

[0038] Working principle: When using this device to perform air tightness detection on the oil pan body 01, it is first necessary to control the external hydraulic telescopic rod 41 to extend the working end of the external hydraulic telescopic rod 41 so that the connected mobile rear frame 42 and the structure on the mobile rear frame 42 rise to one end position of the vertical guide rail 43, and then open the drain valve 25 at the bottom of the tank box 22 to drain the water inside the tank box 22. After draining, close the drain valve 25 and control the waterproof electric telescopic rod 31 in the internal clamping and fixing component group 03 to extend the working end of the waterproof electric telescopic rod 31, thereby driving the lower shell 32 and the structure connected to the lower shell 32 to move upward, so that the lower shell 32 and the upper shell 33 extend to the outside of the tank box 22. At this time, the oil pan body 01 is placed on the gasket connected to one end of the vertical threaded rod 314. At this time, the gasket will contact the top of the inner wall of the oil pan body 01. Due to the difference in size of the oil pan body 01, by rotating the vertical threaded rod 31 The adjusting knob at one end of the 4 can make the vertical threaded rod 314 move up and down in the inner frame 313. By adjusting the position of the vertical threaded rod 314, the bottom surface of the oil pan body 01 is adjusted to a horizontal position. After the position adjustment is completed, the waterproof servo motor 35 inside the lower shell 32 is started. The waterproof servo motor 35 drives the large synchronous gear 36 through the working end, and then drives the sleeve member 39 to rotate through the synchronous belt 37 and the small synchronous gear 38. The sleeve member 39 rotates and drives the screw rod 1 310 to extend from the inside of the sleeve member 39 through the nut pair. The extension of the screw rod 1 310 allows the support pad 311 to contact the inner wall side of the oil pan body 01. Through the support pads 311 and the screw rod 1 310 on both sides, the clamping and fixing operation of the oil pan body 01 from the inside is completed. At this time, the oil pan body 01 will be fixed on the inner clamping and fixing component group 03, and the oil pan body 01 will move with the movement of the lower shell 32 and the upper shell 33.

[0039] After the inner clamping fixing component group 03 fixes the oil pan body 01, the waterproof electric telescopic rod 31 is controlled to retract, so that the oil pan body 01 moves downward until the bottom surface of the oil pan body 01 contacts the rubber sealing sheet 23, and the bottom surface of the oil pan body 01 is pressed into a part of the rubber sealing sheet 23 through the control of the waterproof electric telescopic rod 31. The rubber sealing sheet 23 is used to ensure the sealing between the oil pan body 01 and the tank box 22. At this time, the oil pan body 01 will separate the tank box 22 into two spaces, namely the upper A1 and the lower A2. Figure 5 As shown, air tightness test can be carried out at this time;

[0040] Open the liquid inlet valve 24 on the side of the tank box 22 to allow external water to enter A1 through the liquid inlet valve 24, and let the water fill the space, and the water surface should be just level with the top opening of the tank box 22, then open the air valve on the gas collecting bottle connected to the side air pipe 412 to allow the inside of the gas collecting bottle to communicate with the external air, and then control the external hydraulic telescopic rod 41 in the bubble detection component group 04 to allow the cover frame 44 to cover the top opening of the main frame 21, and the gas collecting box 48 will be inserted into the water, and the water surface will be located at the connection position between the gas collecting box 48 and the stainless steel cylinder 49. During the process of inserting the gas collecting box 48 into the water, the gas in the stainless steel cylinder 49 will enter through the side air pipe 412. The gas is collected in the gas collecting bottle and discharged through the large air valve on the gas collecting bottle. After the discharge is completed, the large air valve on the gas collecting bottle is closed, and the small air valves on the multiple side air pipe parts 412 are closed. At this time, the servo motor part 45 can be controlled to rotate the screw rod 46 to drive the return plate 47 to move upward. The upward movement of the return plate 47 will release the contact with the position indicating rod 411. At this time, observe whether the position indicating rod 411 extends out of the stainless steel tube 49. If it does not extend, it is a normal state that can be detected. If it extends, open the small air valve of the side air pipe part 412 outside the extended position indicating rod 411, press the position indicating rod 411 to retract the position indicating rod 411 into the stainless steel tube 49, and then close the small air valve;

[0041] During the final inspection, the air intake valve 26 is opened, and the air output by the air compressor enters A2 through the pipe connected to the air intake valve 26 and the air intake valve 26. The gas will fill A2. If the oil pan body 01 is sufficiently airtight, the position indicator rod 411 will not extend from the stainless steel cylinder 49. If there is damage, cracks or other damage on the oil pan body 01, the damaged position will cause the gas in A2 to pass through the oil pan body 01 and enter A2, and then form bubbles that are captured by a group of gas collecting boxes 48 at the upper position. The gas causes the air pressure in the stainless steel cylinder 49 to increase, so that the piston 410 and the position indicator rod 411 move upward, allowing the position indicator rod 411 to extend to the outside of the stainless steel cylinder 49. Each position indicator rod 411 has a unique The white numbering and the indicating rod 411 are red. When a certain indicating rod 411 is extended, the operator can easily see the red indicating rod 411. At this time, remember the white number on the indicating rod 411. After completing the inspection, start the external hydraulic telescopic rod 41 to move the mobile rear frame 42 up, then close the air intake valve 26, open the drain valve 25, control the waterproof electric telescopic rod 31 to extend, so that the oil pan body 01 can move up and extend from the tank box 22, so that the operator can remove the oil pan body 01. If there is an airtightness problem, the corresponding leakage position is found according to the recorded unique number, which is convenient for finding the damaged position. If there is no leakage, the next oil pan body 01 can be inspected.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An internal combustion engine parts air tightness detection device, comprising an oil pan body (01), characterized in that: The oil pan body (01) is provided with an external component group (02), an internal clamping and fixing component group (03) and a bubble detection component group (04) on the outside. The internal clamping and fixing component group (03) is installed inside the external component group (02). The internal clamping and fixing component group (03) is used to fix the oil pan body (01) to the external component group (02). The bubble detection component group (04) is used to detect bubbles. The external component group (02) comprises a main frame (21). A tank box (22) is provided on the outside of the main frame (21). A rubber sealing sheet (23) is connected to the inside of the main frame (21). A liquid inlet valve (24) is installed on the side of the main frame (21). A liquid discharge valve (25) is installed on the bottom of the main frame (21). An air intake valve (26) is installed on the side of the main frame (21). The inner clamping and fixing component group (03) comprises a waterproof electric telescopic rod (31), the working end of the waterproof electric telescopic rod (31) is connected to a lower shell (32), the lower shell (32) is connected to an upper shell (33), an inner guide frame (34) is arranged on the side of the waterproof electric telescopic rod (31), a waterproof servo motor (35) is arranged inside the lower shell (32), the working end of the waterproof servo motor (35) is connected to a large synchronous gear (36), and the large synchronous gear (36) is meshed with a synchronous belt (37), the synchronous belt (37) is meshed with a small synchronous gear (38), the small synchronous gear (38) is connected to a sleeve member (39) through a through hole, the sleeve member (39) is connected to a screw rod (310) through a nut pair, one end of the screw rod (310) is connected to a support pad (311), the support pad (311) is connected to an inner guide rod (312), the side of the upper shell (33) is connected to an inner frame (313), and the inner frame (313) is connected to a vertical threaded rod (314) through a thread. The bubble detection component group (04) is provided with an external hydraulic telescopic rod (41), the working end of the external hydraulic telescopic rod (41) is connected to a movable rear frame (42), the side of the movable rear frame (42) is in sliding contact with a vertical guide rail (43), the other side of the movable rear frame (42) is connected to a cover frame (44), the bottom of the cover frame (44) is connected to a servo motor component (45) via a mounting frame, the working end of the servo motor component (45) is connected to a second screw rod (46), the second screw rod (46) is connected to a return plate (47) via a nut pair, an air collecting box (48) is provided inside the cover frame (44), the top of the air collecting box (48) is connected to a stainless steel cylinder (49), a piston component (410) and a position indicating rod (411) are provided inside the stainless steel cylinder (49), and a side air pipe component (412) is connected to the side of the stainless steel cylinder (49).

2. The air tightness detection device for internal combustion engine parts according to claim 1, characterized in that: The trough box (22) is made of stainless steel. The shape of the trough box (22) is a rectangular combination that is wide at the top and narrow at the bottom. The top of the trough box (22) is provided with an opening. The main frame (21) is formed by welding a plurality of aluminum alloys. The main frame (21) is supported on the ground. The trough box (22) is welded to the main frame (21). The liquid inlet valve (24) is connected to a water inlet pipe. The liquid discharge valve (25) is connected to a drain pipe. The air inlet valve (26) is installed on a side of the trough box (22) opposite to the liquid inlet valve (24).

3. The air tightness detection device for internal combustion engine parts according to claim 1, characterized in that: Two waterproof electric telescopic rods (31) are provided, and the two waterproof electric telescopic rods (31) are installed in the slot box (22); the top of the lower shell (32) is provided with an opening; the waterproof servo motor (35) is connected to the bottom of the upper shell (33) via a mounting frame; the small synchronous gear (38), the sleeve member (39), the screw rod 1 (310), the support pad (311) and the inner guide rod (312) are provided in three groups, and the three groups of small synchronous gears (38), the sleeve member (39), the screw rod 1 (310) and the inner guide rod (312) are evenly distributed in the upper shell (33); the support pad (311) is located outside the upper shell (33).

4. The air tightness detection device for internal combustion engine parts according to claim 1, characterized in that: The upper housing (33) is provided with grooves at positions corresponding to the synchronous belt (37), the small synchronous gear (38) and the large synchronous gear (36), and the upper housing (33) does not contact the synchronous belt (37), the small synchronous gear (38) and the large synchronous gear (36) through the grooves. The upper housing (33) is connected through a bearing and a sleeve member (39). One end of the inner guide rod (312) is connected to a support pad (311). The inner guide rod (312) is in sliding contact with the upper housing (33) through a through hole. The support pad (311) is used to contact the side surface of the inner wall of the oil pan body (01). One end of the vertical threaded rod (314) is connected to an adjustment button, and the other end of the vertical threaded rod (314) is connected to a gasket.

5. The air tightness detection device for internal combustion engine parts according to claim 1, characterized in that: The vertical threaded rod (314) contacts the top of the inner wall of the oil pan body (01) via a gasket, and each set of the screw rod 1 (310), the support pad (311) and the inner guide rod (312) is provided with two, and the two screw rods 1 (310), the support pad (311) and the inner guide rod (312) are symmetrically distributed on both sides of the sleeve member (39).

6. The air tightness detection device for internal combustion engine parts according to claim 1, characterized in that: The inner guide frame (34) is in sliding contact with the lower shell (32) via a sliding groove, and the bottom of the inner guide frame (34) is connected to the inner wall of the slot box (22).

7. The air tightness detection device for internal combustion engine parts according to claim 1, characterized in that: Two external hydraulic telescopic rods (41) are provided, and the two external hydraulic telescopic rods (41) are mounted on the main frame (21). The vertical guide rail (43) is mounted on the main frame (21). The working end of the servo motor component (45) is connected to the cover frame (44) via a bearing. A guide rod is provided on the side of the second screw rod (46), and one end of the guide rod is connected to the cover frame (44). The guide rod is in sliding contact with the return plate (47) via a through hole.

8. The air tightness detection device for internal combustion engine parts according to claim 1, characterized in that: The gas collecting box (48), the stainless steel cylinder (49), the piston member (410) and the position indicating rod (411) are provided in plurality, and the plurality of gas collecting boxes (48), the stainless steel cylinder (49), the piston member (410) and the position indicating rod (411) are arranged in a row inside the cover frame (44), the plurality of gas collecting boxes (48) are connected to each other, the cover frame (44) is connected to the gas collecting box (48) via a through groove, the bottom and the top of the gas collecting box (48) are both provided with openings, and the bottom opening of the gas collecting box (48) is square, and the gas collecting box (48) is The top opening is circular, one end of the stainless steel cylinder (49) contacts the return plate (47), the stainless steel cylinder (49) slidably contacts the position indicating rod (411) through the hole, one end of the position indicating rod (411) is connected to the piston member (410), the other end of the position indicating rod (411) passes through the hole of the stainless steel cylinder (49) and contacts the return plate (47), the piston member (410) slidably contacts the stainless steel cylinder (49), and an O-ring is installed on the piston member (410), and the bottom of the cover frame (44) contacts the top of the tank box (22).

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