Air tightness detection device for automobile engine oil pan

Abstract

The invention provides an air tightness detection device for an automobile engine oil pan, and the device comprises a supporting seat, a supporting assembly, a sealing cover, an inner sealing plug, an outer sealing plug, a threaded locking assembly, and a traction assembly. The sealing cover is arranged at the connecting port of the engine oil bottom shell in a covering mode, then the outer sealing plug on the outer portion and the inner sealing plug in the engine oil bottom shell are in threaded connection through the threaded locking assembly, locking is achieved, an inner opening and an outer opening of the oil outlet are sealed and shielded, and in the locking process, the sealing cover is tightly locked through the threaded locking assembly. The inner sealing plug and the outer sealing plug block the inner opening and the outer opening of the oil outlet of the engine oil pan body, the inner opening and the outer opening of the oil outlet can be conveniently blocked, in the process that the inner sealing plug is inserted into the oil outlet of the engine oil pan body, the sealing cover is tightly pulled through the traction assembly, and the oil outlet can be tightly sealed and locked while the oil outlet is sealed and locked. And the sealing of the sealing cover on the connecting port is further stabilized.

Description

Technical Field

[0001] The present invention belongs to the field of airtightness detection devices, and particularly relates to an airtightness detection device for an automobile oil pan. Background Art

[0002] The structure of an automobile oil pan includes a raised liquid storage cavity, a connection port, and an oil outlet. The oil outlet is arranged at the bottom edge of the liquid storage cavity. During the process of detecting the airtightness of the automobile oil pan, a sealing cover is pressed tightly against the connection port, and an oil outlet is blocked by a sealing plug. Then, the liquid storage cavity is evacuated and the air pressure is detected. However, due to the irregular structure of the automobile oil pan, the positioning difficulty of the automobile oil pan is increased, and it is not convenient to stably block the connection port and the oil outlet of the automobile oil pan. Summary of the Invention

[0003] In view of this, the present invention aims to provide an airtightness detection device for an automobile oil pan to solve the technical problem that due to the irregular structure of the automobile oil pan, the positioning difficulty of the automobile oil pan is increased, and it is not convenient to stably block the connection port and the oil outlet of the automobile oil pan.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows: An airtightness detection device for an automobile oil pan includes a support base, and further includes a support assembly, a sealing cover, an inner sealing plug, an outer sealing plug, a threaded locking assembly, and a pulling assembly. The support assembly is arranged on the support base, and the support assembly is used for supporting and positioning the oil pan body. The sealing cover is arranged on the top of the oil pan body. A one-way connection valve is fixedly communicated with the top of the sealing cover. A pressure detector is fixedly inserted into the top of the sealing cover. The inner sealing plug is inserted into the inner port of the oil outlet of the oil pan body. The outer sealing plug is arranged at the outer port of the oil outlet of the oil pan body. During the process of threadedly connecting the inner sealing plug and the outer sealing plug by the threaded locking assembly, the inner sealing plug and the outer sealing plug are pulled to block the inner and outer ports of the oil outlet of the oil pan body. And during the process of inserting the inner sealing plug into the oil outlet of the oil pan body, the inner sealing plug tightens the sealing cover through the pulling assembly.

[0005] Further, the support assembly includes two first support frames and two second support frames. The two first support frames are symmetrically and fixedly connected to the front and rear sides of the top of the support base. The two second support frames are symmetrically and fixedly connected to the left and right sides of the top of the support base. The tops of the two first support frames and the two second support frames are all in contact with the bottom of the connection port of the oil pan body. The top of the support base is in contact with the bottom of the oil pan body.

[0006] Furthermore, the inner sealing plug is a first plug connector, the first plug connector is inserted into the inner opening of the oil pan housing oil outlet, a prism is fixedly connected to the surface of the first plug connector, a connecting seat is slidably sleeved on the surface of the prism, an elastic telescopic rod is fixedly connected between the top of the connecting seat and the bottom of the sealing cover, a first support spring is sleeved on the surface of the prism, and both ends of the first support spring are fixedly connected to the first plug connector and the connecting seat respectively.

[0007] Furthermore, the inner sealing plug is a first plug connector, the first plug connector is inserted into the inner opening of the oil pan housing oil outlet, a prism is fixedly connected to the surface of the first plug connector, a connecting seat is slidably sleeved on the surface of the prism, an elastic telescopic rod is fixedly connected between the top of the connecting seat and the bottom of the sealing cover, a first support spring is sleeved on the surface of the prism, and both ends of the first support spring are fixedly connected to the first plug connector and the connecting seat respectively.

[0008] Furthermore, the outer sealing plug is a second plug connector, and the second plug connector is inserted into the outer opening of the oil pan housing oil outlet.

[0009] Furthermore, the threaded locking assembly includes a threaded rod and a threaded hole. The threaded hole is opened at the end of the first plug connector. The threaded rod is rotatably connected to the end of the second plug connector. One end of the threaded rod is threadedly inserted into the threaded hole, and the other end of the threaded rod penetrates through the second plug connector and extends to the outside of the second plug connector.

[0010] Furthermore, the threaded locking assembly further includes a main docking seat and a third motor. The main docking seat is slidably connected to the top of the support seat through a slide rail. A support tube is slidably inserted into the main docking seat. The support tube is fixedly connected to the end of the second plug connector and sleeved on the outside of the threaded rod. A motor is fixedly installed at the end of the support tube. The output end of the motor is fixedly connected to the end of the threaded rod. A second support spring is sleeved on the surface of the support tube. Both ends of the second support spring are fixedly connected to the main docking seat and the second plug connector respectively; The third motor is fixedly installed on the top of the support seat, and the output end of the third motor is fixedly connected to a driving screw. The main docking seat is threadedly sleeved on the surface of the driving screw.

[0011] Furthermore, the elastic support rod includes a telescopic seat and a telescopic rod. The telescopic rod is slidably inserted into the interior of the telescopic seat. A third support spring is fixedly connected between the bottom of the telescopic rod and the telescopic seat.

[0012] Furthermore, the pulling assembly includes a pulling plate fixedly connected to the bottom of the sealing cover. A linkage plate is fixedly connected between the pulling plate and the telescopic rod. A guiding groove is formed on the surface of the linkage plate. The guiding groove includes a first horizontal groove and a first inclined groove. A traction pin is slidably connected in the first inclined groove. Both ends of the traction pin are fixedly connected with connecting plates, and the two connecting plates are fixedly connected to the surface of the prism.

[0013] Furthermore, L-shaped positioning brackets are fixedly connected to the side walls of the first support frame and the second support frame. A linkage frame is slidably inserted into the side wall of the positioning bracket. The linkage frame includes a first horizontal plate and a first vertical plate. The first horizontal plate is inserted through the positioning bracket, and a pulling groove is formed at the top. The pulling groove has an inclined surface. The top of the first vertical plate is fixedly connected with a plug pin. The plug pin penetrates through the top end of the positioning bracket. A fourth support spring is sleeved on the surface of the plug pin. Both ends of the fourth support spring are fixedly connected with the first vertical plate and the positioning bracket respectively. A positioning plate is fixedly connected to the end of the plug pin. The positioning plate contacts the sealing cover and the edge of the oil pan housing respectively. Relieving grooves are formed at the top ends of the first support frame and the second support frame. A pressing plate is slidably inserted into the relieving groove. The pressing plate is slidably inserted into the inner wall of the relieving groove. A pushing block is fixedly connected to the end of the pressing plate. The pushing block is in contact with the inclined surface. Furthermore, two positioning heads are fixedly connected to the surface of the positioning plate. The two positioning heads contact the sealing cover and the edge of the oil pan housing respectively.

[0014] Compared with the prior art, the airtightness detection device for an automobile oil pan of the present invention has the following beneficial effects: (1) In the present invention, the sealing cover is covered at the connection port of the oil pan housing, and then the external outer sealing plug and the inner sealing plug inside the oil pan housing are threadedly connected through the thread locking assembly to achieve locking, so as to seal and block both the inner and outer ports of the oil outlet. During the locking process, the inner sealing plug and the outer sealing plug block the inner and outer ports of the oil outlet of the oil pan housing, which is convenient for blocking both the inner and outer ports of the oil outlet. And during the process of inserting the inner sealing plug into the oil outlet of the oil pan housing, the sealing cover is tightened by the pulling assembly, so as to further stably seal the connection port by the sealing cover while sealing and locking the oil outlet.

[0015] (2) Since the oil pan housing is positioned under the combined support of the support assembly and the support base, the orientation of the oil outlet of the oil pan housing is determined. During the process of thread locking, the third motor and the second motor can be started. The third motor drives the drive screw to rotate, and the drive screw thread-drives the active docking seat to move. The active docking seat synchronously drives the support pipe and the second plug to be inserted into the outer port of the oil outlet of the oil pan housing. Moreover, the threaded rod enters the interior of the oil pan housing through the oil outlet to thread into the threaded hole of the first plug, automatically realizing insertion and docking simultaneously until the first plug is completely inserted into the inner port of the oil outlet, which facilitates the sealing of both ends of the oil outlet by the first plug and the second plug, and is conducive to ensuring the sealing performance of the oil outlet. During the process of the sealing cover pressing the connection port of the oil pan housing, the pressing plate will be pushed down. The pressing plate drives the pushing block to squeeze the inclined surface, causing the first cross plate to be pulled. The first cross plate drives the insertion pin on the first vertical plate to move, and the insertion pin drives the positioning plate to approach the side wall of the edge of the connection port of the oil pan housing, realizing the tightening of the four directions of the side wall of the edge of the connection port of the oil pan housing, centering and positioning both the oil pan housing and the sealing cover, avoiding deviation, and being conducive to achieving the precise docking and sealing of the sealing cover and the connection port of the oil pan housing in the up and down directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 It is the first structural schematic diagram of a device for detecting the airtightness of an automobile oil pan according to an embodiment of the present invention; Figure 2 is Figure 1 the enlarged view of part A in Figure 3 It is the structural sectional view of the active docking seat, the support pipe and the second plug of a device for detecting the airtightness of an automobile oil pan according to an embodiment of the present invention; Figure 4 It is the partial structural sectional view of the elastic support rod and the pulling assembly of a device for detecting the airtightness of an automobile oil pan according to an embodiment of the present invention; Figure 5 It is the structural schematic diagram of the support base and the support assembly of a device for detecting the airtightness of an automobile oil pan according to an embodiment of the present invention; Figure 6 is Figure 5 the enlarged view of part B in Figure 7 is Figure 5 the enlarged view of part C in Figure 8This is a structural schematic diagram of a second support frame and a pressure plate for an automobile oil pan air tightness detection device according to an embodiment of the present invention; Figure 9 This is a schematic structural diagram of a linkage frame for an automobile oil pan air tightness detection device according to an embodiment of the present invention; Figure 10 This is a structural schematic diagram of a linkage frame and a positioning frame for an automobile oil pan air tightness detection device according to an embodiment of the present invention; Figure 11 This is a schematic structural diagram of a sealing cover for an automobile oil pan air tightness detection device according to an embodiment of the present invention; Figure 12 The present invention is a schematic structural diagram of an oil pan housing for use in an automobile oil pan air tightness detection device according to an embodiment of the present invention.

[0017] Description of reference numerals: 1-support seat; 2-sealing cover; 3-limiting rod; 4-sealing ring; 5-one-way connection valve; 6-air pressure detector; 7-oil bottom shell; 8-oil outlet; 9-first support frame; 10-second support frame; 11-first plug connector; 12-prism; 13-connecting seat; 14-pushing block; 15-elastic telescopic rod; 1501-telescopic seat; 1502-telescopic rod; 1503-third support spring; 16-first support spring; 17-second plug connector; 18-threaded rod; 19-threaded hole; 20-active docking seat; 21-third motor; 22-support tube; 23-second motor; 24-second support Spring; 25-driving screw; 26-pulling plate; 27-guide groove; 2701-first transverse groove; 2702-first inclined groove; 28-traction pin; 29-connecting plate; 30-positioning frame; 31-linkage frame; 32-traction frame; 33-fifth supporting spring; 34-pulling groove; 3401-inclined surface; 35-plug pin; 36-fourth supporting spring; 37-positioning plate; 38-giving groove; 39-positioning head; 40-pressing plate; 41-mounting frame; 42-threaded sleeve; 43-pressing screw; 44-pressing circular plate; 45-follow-up gear; 46-fourth motor; 47-driving gear; 48-linkage plate. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0021] For a better understanding of the following embodiments, the automotive oil pan is explained: Figure 12 As shown, the automotive oil pan in the actual product is the oil pan housing 7. The structure of the oil pan housing 7 includes a raised liquid storage cavity 701, a connection port 702, and an oil outlet 8. The oil outlet 8 is provided at the bottom edge of the liquid storage cavity 701. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0022] As Figures 1 to 12As shown, in one embodiment, a device for detecting the airtightness of an automobile oil pan includes a support base 1, and also includes a support assembly, a sealing cover 2, an inner sealing plug, an outer sealing plug, a threaded locking assembly, and a pulling assembly. The support assembly is arranged on the support base 1 and is used for supporting and positioning the edge of the connection port 702 of the oil pan housing 7. The sealing cover 2 is arranged on the top of the oil pan housing 7. A one-way connection valve 5 is fixedly communicated with the top of the sealing cover 2. A pressure detector 6 is also fixedly inserted into the top of the sealing cover 2. The inner sealing plug is inserted into the inner port of the oil outlet 8 of the oil pan housing 7, and the outer sealing plug is arranged at the outer port of the oil outlet 8 of the oil pan housing 7. During the process of threadedly connecting the inner sealing plug and the outer sealing plug by the threaded locking assembly, the inner sealing plug and the outer sealing plug block the inner and outer ports of the oil outlet 8 of the oil pan housing 7, and during the process of inserting the inner sealing plug into the interior of the oil outlet 8 of the oil pan housing 7, the sealing cover 2 is tightened by the pulling assembly.

[0023] It should be understood that the edge of the connection port 702 of the oil pan housing 7 is placed on the support assembly, and then the sealing cover 2 is placed on the connection port 702 of the oil pan housing 7. Then, the outer sealing plug outside is threadedly connected with the inner sealing plug inside the oil pan housing 7 through the threaded locking assembly to achieve locking, so as to seal and block both the inner and outer ports of the oil outlet 8. And during the locking process, the inner sealing plug and the outer sealing plug block the inner and outer ports of the oil outlet 8 of the oil pan housing 7, which is convenient for blocking both the inner and outer ports of the oil outlet 8. And during the process of inserting the inner sealing plug into the interior of the oil outlet 8 of the oil pan housing 7, the sealing cover 2 is tightened by the pulling assembly, so as to further stabilize the sealing of the sealing cover 2 to the connection port 702 while sealing and locking the oil outlet 8.

[0024] Specifically, the airtightness detection method is as follows: After sealing the connection port 702 through the sealing cover 2, it is communicated with an external vacuum pumping device through the one-way connection valve 5 to pump vacuum. After the vacuum pumping is completed, the pressure inside the oil pan housing 7 is monitored through the pressure detector 6. If the pressure remains stable, it indicates that the airtightness of the oil pan housing 7 meets the requirements.

[0025] Specifically, a sealing ring 4 is fixedly connected to the bottom of the sealing cover 2. During the process of the sealing cover 2 sealing the connection port 702, the sealing ring 4 will block the gap between the sealing cover 2 and the connection port 702.

[0026] The support assembly includes two first support frames 9 and two second support frames 10. The two first support frames 9 are symmetrically and fixedly connected to the front and rear sides of the top of the support base 1, and the two second support frames 10 are symmetrically and fixedly connected to the left and right sides of the top of the support base 1. The tops of the two first support frames 9 and the two second support frames 10 are all in contact with the bottom of the connection port 702 of the oil pan housing 7, and the top of the support base 1 is in contact with the bottom of the oil pan housing 7.

[0027] It should be understood that by providing the first support frame 9 and the second support frame 10, the edge of the connection port 702 of the oil pan housing 7 is supported, and the bottom end of the liquid storage cavity 701 of the oil pan housing 7 is supported on the top of the support base 1, achieving stable support for the oil pan housing 7, preventing the oil pan housing 7 from tipping over, and providing favorable conditions for sealing.

[0028] The inner seal plug is the first plug connector 11. The first plug connector 11 is inserted into the inner port of the oil outlet 8 of the oil pan housing 7. A prism 12 is fixedly connected to the surface of the first plug connector 11. A connection seat 13 is slidably sleeved on the surface of the prism 12. An elastic telescopic rod 15 is fixedly connected between the top of the connection seat 13 and the bottom of the seal cover 2. A first support spring 16 is sleeved on the surface of the prism 12. Both ends of the first support spring 16 are fixedly connected to the first plug connector 11 and the connection seat 13 respectively.

[0029] The outer seal plug is the second plug connector 17. The second plug connector 17 is inserted into the outer port of the oil outlet 8 of the oil pan housing 7.

[0030] The threaded locking assembly includes a threaded rod 18 and a threaded hole 19. The threaded hole 19 is opened at the end of the first plug connector 11. The threaded rod 18 is rotatably connected to the end of the second plug connector 17. One end of the threaded rod 18 is threadedly inserted into the threaded hole 19, and the other end of the threaded rod 18 penetrates through the second plug connector 17 and extends to the outside of the second plug connector 17.

[0031] It should be understood that the specific method for locking the inner seal plug and the outer seal plug is as follows: In the first step, first insert the second plug connector 17 of the outer seal plug into the outer port of the oil outlet 8 of the oil pan housing 7; In the second step, screw the threaded rod 18 on the second plug connector 17 into the threaded hole 19 on the first plug connector 11, and pull and insert the first plug connector 11 of the inner seal plug inside the liquid storage cavity 701 of the oil pan housing 7 into the inner port of the oil outlet 8 of the oil pan housing 7. During the process of inserting the first plug connector 11 into the inner port of the oil outlet 8 of the oil pan housing 7, the seal cover 2 will be pulled by the pulling assembly, so that the seal cover 2 can be tightened, further stabilizing the sealing of the seal cover 2 to the connection port 702.

[0032] Specifically, an installation frame 41 is also fixedly connected to the top of the support base 1. A threaded sleeve 42 is rotatably connected to the top of the installation frame 41. A downward pressure screw 43 is threadedly connected inside the threaded sleeve 42. The bottom end of the downward pressure screw 43 penetrates through the installation frame 41 and is fixedly connected to a pressing circular plate 44. The pressing circular plate 44 is in contact with the top of the sealing cover 2. A follower gear 45 is fixedly connected to the surface of the threaded sleeve 42. A fourth motor 46 is fixedly installed on the top of the installation frame 41. The output end of the fourth motor 46 is fixedly connected to a driving gear 47. The driving gear 47 meshes with the follower gear 45; A traction frame 32 is slidably sleeved on the surface of the downward pressure screw 43. The traction frame 32 is fixedly connected to the top of the sealing cover 2. A fifth support spring 33 is sleeved on the surface of the downward pressure screw 43. The two ends of the fifth support spring 33 are respectively fixedly connected to the pressing circular plate 44 and the traction frame 32. Two limit slide bars 3 are also fixedly connected to the top of the sealing cover 2. The top ends of the two limit slide bars 3 penetrate through the installation frame 41 and extend above the installation frame 41; It should be understood that after the oil pan housing 7 is limited on the support assembly, the fourth motor 46 is started. The fourth motor 46 drives the driving gear 47 to rotate. The driving gear 47 drives the follower gear 45 to rotate. The follower gear 45 synchronously drives the threaded sleeve 42 to rotate. The threaded sleeve 42 threadedly drives the downward pressure screw 43 to move downward. The downward pressure screw 43 drives the sealing cover 2 to a specified height above the connection port 702 of the oil pan housing 7 through the traction frame 32. At this time, through the support of the elastic telescopic rod 15, the connection seat 13 and the first support spring 16, when the sealing cover 2 is lowered to a specified height above the connection port 702, the first plug connector 11 is aligned with the oil outlet 8, providing favorable conditions for the docking of the threaded locking assembly.

[0033] It should be noted that during the process of the sealing cover 2 being pulled, the traction frame 32 can compress the fifth support spring 33, providing the sealing cover 2 with the freedom of downward pressure sealing.

[0034] As Figures 1 to 5 、 Figure 7 and Figure 11 shown, in one embodiment, the threaded locking assembly further includes a main docking seat 20 and a third motor 21. The main docking seat 20 is slidably connected to the top of the support base 1 through a slide rail. A support tube 22 is slidably inserted into the main docking seat 20. The support tube 22 is fixedly connected to the end of the second plug connector 17 and is sleeved outside the threaded rod 18. A second motor 23 is fixedly installed at the end of the support tube 22. The output end of the second motor 23 is fixedly connected to the end of the threaded rod 18. A second support spring 24 is sleeved on the surface of the support tube 22. The two ends of the second support spring 24 are respectively fixedly connected to the main docking seat 20 and the second plug connector 17; The third motor 21 is fixedly installed on the top of the support base 1. The output end of the third motor 21 is fixedly connected with a driving screw rod 25, and the active docking seat 20 is threadedly sleeved on the surface of the driving screw rod 25.

[0035] It should be understood that since the oil pan housing 7 is positioned under the combined support of the support assembly and the support base 1, the orientation of the oil outlet 8 of the oil pan housing 7 is determined. During the process of threaded locking, the third motor 21 and the second motor 23 can be started. The third motor 21 will drive the driving screw rod 25 to rotate, and the driving screw rod 25 will threadedly drive the active docking seat 20 to move. The active docking seat 20 will synchronously drive the support pipe 22 and the second plug 17 to be inserted into the outer port of the oil outlet 8 of the oil pan housing 7, and the threaded rod 18 will enter the interior of the oil pan housing 7 through the oil outlet 8 to align with the threaded hole 19 of the first plug 11, automatically realizing insertion and docking simultaneously until the first plug 11 is completely inserted into the inner port of the oil outlet 8, which is convenient for the first plug 11 and the second plug 17 to seal both ends of the oil outlet 8, and is beneficial to ensuring the sealing performance of the oil outlet 8. It should be noted that during the process of the driving screw rod 25 driving the second plug 17 to be inserted into the oil outlet 8, if the progress of the threaded connection is slower than the moving progress of the active docking seat 20, the second support spring 24 can achieve elastic yielding until the active docking seat 20 moves to the end of the driving screw rod 25 to avoid jamming.

[0036] As Figure 4 shown, in one embodiment, the elastic support rod includes a telescopic seat 1501 and a telescopic rod 1502. The telescopic rod 1502 is slidably inserted into the interior of the telescopic seat 1501, and a third support spring 1503 is fixedly connected between the bottom of the telescopic rod 1502 and the telescopic seat 1501. The pulling component includes a pulling plate 26. The pulling plate 26 is fixedly connected to the bottom of the sealing cover 2. A linkage plate 48 is fixedly connected between the pulling plate 26 and the telescopic rod 1502. A guiding groove 27 is formed on the surface of the linkage plate 48. The guiding groove 27 includes a first horizontal groove 2701 and a first inclined groove 2702. A traction pin 28 is slidably connected in the first inclined groove 2702. Both ends of the traction pin 28 are fixedly connected with connecting plates 29, and the two connecting plates 29 are fixedly connected to the surface of the prism 12.

[0037] It should be understood that during the process of pulling the second plug connector 17 and inserting it into the oil outlet 8, the first plug connector 11 will drive the prism 12 to move, the prism 12 will drive the connecting plate 29 to move, and the connecting plate 29 will drive the traction pin 28 to move from the first horizontal groove 2701 to the first inclined groove 2702. During the process of the traction pin 28 passing through the first inclined groove 2702, the linkage plate 48 is pulled, and the linkage plate 48 will pull the sealing cover 2 through the telescopic rod 1502 and the traction pin 28. When the first plug connector 11 is locked, the sealing cover 2 is pulled to closely adhere to the connection port 702 of the oil pan housing 7.

[0038] As Figure 1 , Figure 5 , Figure 6 , Figures 8 to 10 shown, in one embodiment, L-shaped positioning frames 30 are fixedly connected to the side walls of the first support frame 9 and the second support frame 10. A linkage frame 31 is slidably inserted into the side wall of the positioning frame 30. The linkage frame 31 includes a first horizontal plate 3101 and a first vertical plate 3102. The first horizontal plate 3101 is inserted through the positioning frame 30, and a pulling groove 34 is formed at the top. The pulling groove 34 has an inclined surface 3401. A plug pin 35 is fixedly connected to the top of the first vertical plate 3102. The plug pin 35 penetrates through the top end of the positioning frame 30. A fourth support spring 36 is sleeved on the surface of the plug pin 35. The two ends of the fourth support spring 36 are fixedly connected to the first vertical plate 3102 and the positioning frame 30 respectively. A positioning plate 37 is fixedly connected to the end of the plug pin 35; Relief grooves 38 are formed at the top ends of the first support frame 9 and the second support frame 10. A pressing plate 40 is slidably inserted into the relief groove 38. The pressing plate 40 is slidably inserted into the inner wall of the relief groove 38. A pushing block 14 is fixedly connected to the end of the pressing plate 40. The pushing block 14 is in contact with the inclined surface 3401; Two positioning heads 39 are fixedly connected to the surface of the positioning plate 37. The two positioning heads 39 are respectively in contact with the sealing cover 2 and the edge of the connection port 702 of the oil pan housing 7.

[0039] It should be understood that during the process of the sealing cover 2 pressing the connection port 702 of the oil pan housing 7, the pressing plate 40 will be pressed down. The pressing plate 40 drives the pushing block 14 to press the inclined surface 3401, so that the first horizontal plate 3101 is pulled. The first horizontal plate 3101 will drive the plug pin 35 on the first vertical plate 3102 to move. The plug pin 35 drives the positioning plate 37 to approach the side wall of the edge of the connection port 702 of the oil pan housing 7, realizing the tightening of the four directions of the side wall of the edge of the connection port 702 of the oil pan housing 7, centering and positioning both the oil pan housing 7 and the sealing cover 2, avoiding deviation, and being beneficial to realizing the precise butt joint and sealing in the up and down directions between the sealing cover 2 and the connection port 702 of the oil pan housing 7.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for detecting air tightness of an automobile oil pan, comprising a support seat (1), characterized in that: The invention also comprises a support assembly, a sealing cover (2), an inner sealing plug, an outer sealing plug, a thread locking assembly and a pulling assembly. The support assembly is arranged on a support seat (1), and is used to support and position the engine oil sump housing (7). The sealing cover (2) is arranged on the top of the engine oil sump housing (7). The top of the sealing cover (2) is fixedly connected to a one-way connection valve (5). The top of the sealing cover (2) is also fixedly plugged with an air pressure detector (6). The inner sealing plug is plugged into the engine oil sump housing. The outer sealing plug is arranged at the inner opening of the oil outlet (8) of the engine oil sump housing (7), and the outer sealing plug is arranged at the outer opening of the oil outlet (8) of the engine oil sump housing (7). During the process of threaded connection between the inner sealing plug and the outer sealing plug by the threaded locking assembly, the inner sealing plug and the outer sealing plug are pulled to seal the inner and outer openings of the oil outlet (8) of the engine oil sump housing (7), and during the process of the inner sealing plug being inserted into the oil outlet (8) of the engine oil sump housing (7), the inner sealing plug tightens the sealing cover (2) through the pulling assembly.

2. The device for detecting air tightness of an automobile oil pan according to claim 1, characterized in that: The support assembly comprises two first support frames (9) and two second support frames (10), the two first support frames (9) being symmetrically fixedly connected to the front and rear sides of the top of the support seat (1), and the two second support frames (10) being symmetrically fixedly connected to the left and right sides of the top of the support seat (1), the top ends of the two first support frames (9) and the two second support frames (10) both being in contact with the bottom end of the edge of the oil sump housing (7), and the top of the support seat (1) being in contact with the bottom of the oil sump housing (7).

3. The device for detecting air tightness of an automobile oil pan according to claim 2, characterized in that: The inner sealing plug is a first plug connector (11), the first plug connector (11) being plugged into the inner opening of the oil outlet (8) of the engine oil sump housing (7), a prism (12) being fixedly connected to the surface of the first plug connector (11), a connecting seat (13) being slidably sleeved on the surface of the prism (12), an elastic telescopic rod (15) being fixedly connected between the top of the connecting seat (13) and the bottom of the sealing cover (2), a first support spring (16) being sleeved on the surface of the prism (12), and two ends of the first support spring (16) being fixedly connected to the first plug connector (11) and the connecting seat (13), respectively.

4. The device for detecting air tightness of an automobile oil pan according to claim 3, characterized in that: The outer sealing plug is a second plug connector (17), and the second plug connector (17) is plugged into the outer opening of the oil outlet (8) of the oil sump housing (7).

5. The device for detecting air tightness of an automobile oil pan according to claim 4, characterized in that: The threaded locking assembly comprises a threaded rod (18) and a threaded hole (19); the threaded hole (19) is formed at an end of the first plug connector (11); the threaded rod (18) is rotatably connected to the end of the second plug connector (17); one end of the threaded rod (18) is threadedly inserted into the threaded hole (19); and the other end of the threaded rod (18) passes through the second plug connector (17) and extends to the outside of the second plug connector (17).

6. The device for detecting air tightness of an automobile oil pan according to claim 5, characterized in that: The threaded locking assembly further comprises an active docking seat (20) and a third motor (21); the active docking seat (20) is slidably connected to the top of the support seat (1) via a slide rail; a support tube (22) is slidably plugged into the active docking seat (20); the support tube (22) is fixedly connected to the end of the second plug connector (17) and sleeved on the outside of the threaded rod (18); a motor is fixedly mounted on the end of the support tube (22); an output end of the motor is fixedly connected to the end of the threaded rod (18); a second support spring (24) is sleeved on the surface of the support tube (22); two ends of the second support spring (24) are respectively fixedly connected to the active docking seat (20) and the second plug connector (17); The third motor (21) is fixedly mounted on the top of the support seat (1); the output end of the third motor (21) is fixedly connected to a driving screw (25); and the active docking seat (20) is threadedly sleeved on the surface of the driving screw (25).

7. A device for detecting air tightness of an automobile oil pan according to any one of claims 3 to 6, characterized in that: The elastic support rod comprises a telescopic seat (1501) and a telescopic rod (1502); the telescopic rod (1502) is slidably inserted into the interior of the telescopic seat (1501); and a third support spring (1503) is fixedly connected between the bottom of the telescopic rod (1502) and the telescopic seat (1501).

8. The device for detecting air tightness of an automobile oil pan according to claim 7, characterized in that: The pulling assembly comprises a pulling plate (26), wherein the pulling plate (26) is fixedly connected to the bottom of the sealing cover (2), and a linkage plate (48) is fixedly connected between the pulling plate (26) and the telescopic rod (1502). A guide groove (27) is provided on the surface of the linkage plate (48), and the guide groove (27) comprises a first transverse groove (2701) and a first inclined groove (2702). A pulling pin (28) is slidably connected in the first inclined groove (2702), and both ends of the pulling pin (28) are fixedly connected to connecting plates (29), and the two connecting plates (29) are fixedly connected to the surface of the prism (12).

9. The device for detecting air tightness of an automobile oil pan according to claim 8, characterized in that: An L-shaped positioning frame (30) is fixedly connected to the side walls of the first support frame (9) and the second support frame (10); a linkage frame (31) is slidably plugged into the side walls of the positioning frame (30); the linkage frame (31) comprises a first transverse plate (3101) and a first vertical plate (3102); the first transverse plate (3101) is inserted through the positioning frame (30) and a pulling groove (34) is provided on the top; the pulling groove (34) has an inclined surface (3401); and the first vertical plate (3102) is provided with a first pull groove (3401). The top of the plug pin (3102) is fixedly connected to a plug pin (35), the plug pin (35) passes through the top of the positioning frame (30), a fourth support spring (36) is sleeved on the surface of the plug pin (35), the two ends of the fourth support spring (36) are respectively fixedly connected to the first vertical plate (3102) and the positioning frame (30), and the end of the plug pin (35) is fixedly connected to a positioning plate (37), and the positioning plate (37) is respectively in contact with the edges of the sealing cover (2) and the oil pan housing (7); The top ends of the first support frame (9) and the second support frame (10) are both provided with a clearance groove (38), a pressing plate (40) is slidably inserted in the clearance groove (38), the pressing plate (40) is slidably inserted on the inner wall of the clearance groove (38), the end of the pressing plate (40) is fixedly connected with a pushing block (14), and the pushing block (14) is arranged in contact with the inclined surface (3401).

10. The air tightness detection device for automobile oil pan according to claim 9, characterized in that: Two positioning heads (39) are fixedly connected to the surface of the positioning plate (37), and the two positioning heads (39) are in contact with the edges of the sealing cover (2) and the oil sump housing (7) respectively.

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