A device for detecting the air tightness of an automobile oil sump

Abstract

The application provides an automobile oil pan air tightness detection device, which comprises a supporting seat, a supporting assembly, a sealing cover, an inner sealing plug, an outer sealing plug, a screw locking assembly and a pulling assembly. The sealing cover is arranged on the connecting port of the oil pan body, the outer sealing plug is threadedly connected with the inner sealing plug in the oil pan body through the screw locking assembly, the inner and outer ports of the oil outlet are sealed and shielded, the inner and outer ports of the oil outlet are blocked by the inner and outer sealing plugs during the locking process, the inner and outer ports of the oil outlet are blocked conveniently, and the sealing cover is pulled tight by the pulling assembly during the process that the inner sealing plug is inserted into the oil outlet of the oil pan body, so that the sealing of the connecting port by the sealing cover is further stabilized while the oil outlet is sealed and locked.

Description

Technical Field

[0001] This invention belongs to the field of airtightness testing devices, and in particular relates to an airtightness testing device for automotive oil pan. Background Technology

[0002] The structure of an automotive oil pan includes a raised reservoir, a connection port, and an oil outlet. The oil outlet is located at the bottom edge of the reservoir. During the airtightness test of the automotive oil pan, a sealing cap is pressed tightly against the connection port, and a sealing plug is used to seal the oil outlet. Then, the reservoir is evacuated, and the air pressure is tested. However, due to the irregular structure of the automotive oil pan, the positioning of the oil pan is more difficult, making it difficult to stably seal the connection port and oil outlet. Summary of the Invention

[0003] In view of this, the present invention aims to propose a device for detecting the airtightness of automotive oil pan, in order to solve the technical problem that the irregular structure of automotive oil pan increases the difficulty of locating the oil pan and makes it inconvenient to stably seal the connection port and oil outlet of the automotive oil pan.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A device for testing the air tightness of an automotive oil pan includes a support base, a support assembly, a sealing cap, an inner sealing plug, an outer sealing plug, a threaded locking assembly, and a pulling assembly. The support assembly is mounted on the support base and is used to support and position the oil pan. The sealing cap is located on the top of the oil pan and has a one-way valve fixedly connected to its top. A pressure detector is also fixedly inserted into the top of the sealing cap. The inner sealing plug is inserted into the inner opening of the oil outlet of the oil pan, and the outer sealing plug is located at the outer opening of the oil outlet. During the threaded connection of the inner and outer sealing plugs by the threaded locking assembly, the inner and outer sealing plugs are pulled, sealing the inner and outer openings of the oil outlet of the oil pan. Furthermore, during the insertion of the inner sealing plug into the oil outlet of the oil pan, the inner sealing plug is tightened by the pulling assembly.

[0006] Furthermore, the support assembly includes two first support frames and two second support frames. The two first support frames are symmetrically fixedly connected to the front and rear sides of the top of the support base, and the two second support frames are symmetrically 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 in contact with the bottom of the oil pan connection port, and the top of the support base is in contact with the bottom of the oil pan.

[0007] Furthermore, the inner sealing plug is a first connector, which is inserted into the inner opening of the oil outlet of the oil pan. A prism is fixedly connected to the surface of the first connector, and 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 the two ends of the first support spring are fixedly connected to the first connector and the connecting seat, respectively.

[0008] Furthermore, the inner sealing plug is a first connector, which is inserted into the inner opening of the oil outlet of the oil pan. A prism is fixedly connected to the surface of the first connector, and 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 the two ends of the first support spring are fixedly connected to the first connector and the connecting seat, respectively.

[0009] Furthermore, the outer sealing plug is a second connector, which is inserted into the outer opening of the oil outlet of the oil pan.

[0010] Furthermore, the threaded locking assembly includes a threaded rod and a threaded hole. The threaded hole is located at the end of the first connector, and the threaded rod is rotatably connected to the end of the second connector. One end of the threaded rod is threaded into the threaded hole, and the other end of the threaded rod passes through the second connector and extends to the outside of the second connector.

[0011] Furthermore, the threaded locking assembly also includes an active docking seat and a third motor. The active docking seat is slidably connected to the top of the support seat via a slide rail. A support tube is slidably inserted into the active docking seat. The support tube is fixedly connected to the end of the second connector and sleeved on the outside of the threaded rod. A second motor is fixedly installed at the end of the support tube. The output end of the second motor is fixedly connected to the end of the threaded rod. A second support spring is sleeved on the surface of the support tube. The two ends of the second support spring are fixedly connected to the active docking seat and the second connector, respectively.

[0012] The third motor is fixedly mounted on the top of the support base, and the output end of the third motor is fixedly connected to a drive screw. The active docking seat is threaded onto the surface of the drive screw.

[0013] Furthermore, the elastic telescopic rod includes a telescopic seat and a telescopic rod, the telescopic rod being slidably inserted into the interior of the telescopic seat, and a third support spring being fixedly connected between the bottom of the telescopic rod and the telescopic seat.

[0014] Furthermore, the traction assembly includes a traction plate, which is fixedly connected to the bottom of the sealing cover. A linkage plate is fixedly connected between the traction plate and the telescopic rod. A guide groove is provided on the surface of the linkage plate. The guide 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 to connecting plates. The two connecting plates are fixedly connected to the surface of the prism.

[0015] Furthermore, L-shaped positioning frames are fixedly connected to the side walls of both the first and second support frames. A linkage frame is slidably inserted into the side wall of the positioning frame. The linkage frame includes a first horizontal plate and a first vertical plate. The first horizontal plate is inserted through the positioning frame and has a pull groove at the top with an inclined surface. A pin is fixedly connected to the top of the first vertical plate. The pin passes through the top of the positioning frame. A fourth support spring is sleeved on the surface of the pin. The two ends of the fourth support spring are fixedly connected to the first vertical plate and the positioning frame, respectively. A positioning plate is fixedly connected to the end of the pin. The positioning plate contacts the sealing cap and the edge of the oil pan housing, respectively.

[0016] The top of the first support frame and the second support frame are both provided with relief grooves. A pressure plate is slidably inserted into the relief groove. The pressure plate is slidably inserted into the inner wall of the relief groove. A push block is fixedly connected to the end of the pressure plate. The push block is in contact with the inclined surface.

[0017] Furthermore, two positioning heads are fixedly connected to the surface of the positioning plate, and the two positioning heads respectively contact the edge of the sealing cap and the oil pan housing.

[0018] Compared with the prior art, the device for detecting the air tightness of automotive oil pans described in this invention has the following advantages:

[0019] (1) The present invention describes placing the sealing cap on the connection port of the oil pan housing, and then using a threaded locking assembly to connect the outer sealing plug to the inner sealing plug inside the oil pan housing to achieve locking, thereby sealing and blocking both the inner and outer openings of the oil outlet. During the locking process, the inner and outer sealing plugs block the inner and outer openings of the oil outlet of the oil pan housing, making it convenient to block both the inner and outer openings of the oil outlet. Furthermore, during the process of inserting the inner sealing plug into the oil outlet of the oil pan housing, the sealing cap is tightened by a pulling assembly, thereby achieving sealing and locking of the oil outlet while further stabilizing the sealing of the connection port by the sealing cap.

[0020] (2) As described in this invention, the oil pan is positioned under the support of the support assembly and the support seat, and the orientation of the oil outlet of the oil pan is determined. During the thread locking process, the third motor and the second motor can be started. The third motor will drive the drive screw to rotate, and the drive screw will drive the active docking seat to move. The active docking seat will simultaneously drive the support tube and the second plug to be inserted into the outer opening of the oil outlet of the oil pan. The threaded rod will enter the oil pan through the oil outlet and align with the threaded hole of the first plug, automatically realizing insertion and docking until the first plug is fully inserted into the inner opening of the oil outlet. This facilitates the sealing of both ends of the oil outlet by the first plug and the second plug, which is beneficial to ensure the sealing performance of the oil outlet.

[0021] During the process of the sealing cap pressing against the connection port of the oil pan, the pressure plate is pressed down. The pressure plate drives the push block to squeeze the inclined surface, which pulls the first horizontal plate. The first horizontal plate drives the insertion pin on the first vertical plate to move. The insertion pin drives the positioning plate to approach the side wall of the oil pan connection port, so as to achieve the four-way clamping of the side wall of the oil pan connection port, and center the oil pan and the sealing cap to avoid displacement. This is conducive to achieving precise vertical sealing between the sealing cap and the oil pan connection port. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the first structure of an automotive oil pan airtightness testing device according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0025] Figure 3 This is a cross-sectional view of the active docking seat, support tube, and second connector of an automotive oil pan airtightness testing device according to an embodiment of the present invention.

[0026] Figure 4 This is a partial structural cross-sectional view of an elastic support rod and a traction assembly for an automotive oil pan airtightness testing device, as described in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the support base and support assembly for an automotive oil pan airtightness testing device according to an embodiment of the present invention;

[0028] Figure 6 for Figure 5Enlarged view of section B;

[0029] Figure 7 for Figure 5 Enlarged view of section C;

[0030] Figure 8 This is a schematic diagram of the structure of the second support frame and pressure plate of an automotive oil pan airtightness testing device according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the linkage frame for an automotive oil pan airtightness testing device according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the linkage frame and positioning frame for an automotive oil pan airtightness testing device according to an embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the structure of a sealing cover for an automotive oil pan airtightness testing device according to an embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram of the structure of an oil pan housing for an automotive oil pan airtightness testing device according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Support base; 2-Sealing cap; 3-Limiting rod; 4-Sealing ring; 5-One-way connecting valve; 6-Air pressure detector; 7-Oil pan; 8-Oil outlet; 9-First support frame; 10-Second support frame; 11-First connector; 12-Pyramid; 13-Connecting seat; 14-Push block; 15-Elastic telescopic rod; 1501-Telescopic seat; 1502-Telescopic rod; 1503-Third support spring; 16-First support spring; 17-Second connector; 18-Threaded rod; 19-Threaded hole; 20-Active docking seat; 21-Third motor; 22-Support tube; 23-Second motor; 24-Second support 25-Spring; 26-Drive screw; 27-Pull plate; 28-Guide groove; 29-First transverse groove; 20-First inclined groove; 21-Traction pin; 22-Connecting plate; 33-Positioning frame; 34-Linkage frame; 35-Traction frame; 36-Fifth support spring; 37-Pull groove; 38-Insertion pin; 39-Fourth support spring; 40-Positioning plate; 41-Mounting frame; 42-Threaded sleeve; 43-Pressing screw; 44-Pressing round plate; 45-Follower gear; 46-Fourth motor; 47-Drive gear; 48-Linkage plate. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] To better understand the following embodiments, the oil pan of an automobile will be explained: Figure 12 As shown, the actual automotive oil pan in the product is an oil pan housing 7. The structure of the oil pan housing 7 includes a raised reservoir 701, a connection port 702, and an oil outlet 8. The oil outlet 8 is located at the bottom edge of the reservoir 701.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] like Figures 1 to 12As shown in one embodiment, a device for testing the air tightness of an automotive oil pan includes a support base 1, a support assembly, a sealing cap 2, an inner sealing plug, an outer sealing plug, a threaded locking assembly, and a pulling assembly. The support assembly is mounted on the support base 1 and is used to support and position the edge of the connection port 702 of the oil pan 7. The sealing cap 2 is mounted on the top of the oil pan 7, and a one-way valve 5 is fixedly connected to the top of the sealing cap 2. A pressure detector 6 is also fixedly inserted into the top of the sealing cap 2. The inner sealing plug is inserted into the inner opening of the oil outlet 8 of the oil pan 7, and the outer sealing plug is mounted at the outer opening of the oil outlet 8 of the oil pan 7. During the threaded connection of the inner and outer sealing plugs by the threaded locking assembly, the inner and outer sealing plugs seal the inner and outer openings of the oil outlet 8 of the oil pan 7. During the insertion of the inner sealing plug into the oil outlet 8 of the oil pan 7, the sealing cap 2 is tightened by the pulling assembly.

[0043] It should be understood that the edge of the connection port 702 of the oil pan 7 is placed on the support assembly, and then the sealing cap 2 is placed on the connection port 702 of the oil pan 7. Then, the outer sealing plug is threadedly connected to the inner sealing plug inside the oil pan 7 through the threaded locking assembly to achieve locking, thus sealing and blocking both the inner and outer openings of the oil outlet 8. During the locking process, the inner and outer sealing plugs block the inner and outer openings of the oil outlet 8 of the oil pan 7, making it convenient to block both the inner and outer openings of the oil outlet 8. During the process of the inner sealing plug being inserted into the oil outlet 8 of the oil pan 7, the sealing cap 2 is pulled tight by the pulling assembly, thereby achieving sealing and locking of the oil outlet 8 while further stabilizing the seal of the sealing cap 2 on the connection port 702.

[0044] Specifically, the airtightness test method is as follows: After sealing the connection port 702 with the sealing cover 2, the external vacuum equipment is connected to the one-way connection valve 5 to perform vacuuming. After the vacuuming is completed, the air pressure in the oil pan 7 is monitored by the air pressure detector 6. If the air pressure is stable and unchanged, it indicates that the sealing performance of the oil pan 7 meets the requirements.

[0045] Specifically, a sealing ring 4 is fixedly connected to the bottom of the sealing cover 2. During the process of sealing the connection port 702 by the sealing cover 2, the sealing ring 4 will seal the gap between the sealing cover 2 and the connection port 702.

[0046] The support assembly includes two first support frames 9 and two second support frames 10. The two first support frames 9 are symmetrically 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 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 in contact with the bottom of the oil pan housing 7 connection port 702, and the top of the support base 1 is in contact with the bottom of the oil pan housing 7.

[0047] It should be understood that by setting the first support frame 9 and the second support frame 10, the edge of the connection port 702 of the oil pan 7 is supported, and the bottom of the oil reservoir 701 of the oil pan 7 is supported at the top of the support seat 1, thus achieving stable support for the oil pan 7, preventing the oil pan 7 from tipping over, and providing favorable conditions for sealing.

[0048] The inner sealing plug is a first connector 11, which is inserted into the inner opening of the oil outlet 8 of the oil pan 7. A prism 12 is fixedly connected to the surface of the first connector 11, and a connecting 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 connecting seat 13 and the bottom of the sealing cover 2. A first support spring 16 is sleeved on the surface of the prism 12, and the two ends of the first support spring 16 are fixedly connected to the first connector 11 and the connecting seat 13 respectively.

[0049] The outer sealing plug is the second connector 17, which is inserted into the outer opening of the oil outlet 8 of the oil pan 7.

[0050] 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 connector 11. The threaded rod 18 is rotatably connected to the end of the second connector 17. One end of the threaded rod 18 is threaded into the threaded hole 19, and the other end of the threaded rod 18 passes through the second connector 17 and extends to the outside of the second connector 17.

[0051] It should be understood that the specific methods for locking the inner and outer sealing plugs are as follows:

[0052] First, insert the second connector 17 of the outer sealing plug into the outer opening of the oil outlet 8 of the oil pan 7;

[0053] The second step involves screwing the threaded rod 18 on the second connector 17 into the threaded hole 19 on the first connector 11, and then pulling and inserting the first connector 11 of the inner sealing plug inside the oil reservoir 701 of the oil pan into the inner opening of the oil outlet 8 of the oil pan. During the process of inserting the first connector 11 into the inner opening of the oil outlet 8 of the oil pan, the sealing cover 2 will be pulled by the pulling component, so that the sealing cover 2 can be tightened, further stabilizing the seal of the sealing cover 2 on the connection port 702.

[0054] Specifically, a mounting bracket 41 is fixedly connected to the top of the support base 1. A threaded sleeve 42 is rotatably connected to the top of the mounting bracket 41. A pressing screw 43 is threadedly connected inside the threaded sleeve 42. The bottom end of the pressing screw 43 passes through the mounting bracket 41 and is fixedly connected to a pressing disc 44. The pressing disc 44 contacts 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 mounting bracket 41. A drive gear 47 is fixedly connected to the output end of the fourth motor 46. The drive gear 47 meshes with the follower gear 45.

[0055] A traction frame 32 is slidably sleeved on the surface of the pressing 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 pressing screw 43. The two ends of the fifth support spring 33 are fixedly connected to the pressing round plate 44 and the traction frame 32 respectively. Two limiting slide rods 3 are also fixedly connected to the top of the sealing cover 2. The top ends of the two limiting slide rods 3 penetrate the mounting frame 41 and extend to the top of the mounting frame 41.

[0056] It should be understood that after the oil pan 7 is positioned on the support assembly, the fourth motor 46 is started. The fourth motor 46 drives the drive gear 47 to rotate, and the drive 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 drives the pressing screw 43 to move downward. The pressing screw 43 drives the sealing cover 2 to a specified height above the connection port 702 of the oil pan 7 through the traction frame 32. At this time, with the support of the elastic telescopic rod 15, the connecting 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 11 is aligned with the oil outlet 8, providing favorable conditions for the docking of the threaded locking assembly.

[0057] 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, giving the sealing cover 2 the freedom to press down and seal.

[0058] like Figures 1 to 5 , Figure 7 and Figure 11 As shown, in one embodiment, the threaded locking assembly further includes 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 inserted into the active docking seat 20. The support tube 22 is fixedly connected to the end of the second connector 17 and sleeved on the outside of 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 fixedly connected to the active docking seat 20 and the second connector 17, respectively.

[0059] 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 to the drive screw 25, and the active docking seat 20 is threaded onto the surface of the drive screw 25.

[0060] It should be understood that, since the oil pan 7 is positioned under the support of the support assembly and the support seat 1, the orientation of the oil outlet 8 of the oil pan 7 is determined. During the threaded locking process, the third motor 21 and the second motor 23 can be started. The third motor 21 will drive the drive screw 25 to rotate, and the drive screw 25 will drive the active docking seat 20 to move. The active docking seat 20 will simultaneously drive the support tube 22 and the second plug 17 to be inserted into the outer opening of the oil outlet 8 of the oil pan 7. The threaded rod 18 will enter the interior of the oil pan 7 through the oil outlet 8 and align with the threaded hole 19 of the first plug 11, automatically achieving insertion and docking until the first plug 11 is fully inserted into the inner opening of the oil outlet 8. This facilitates the sealing of both ends of the oil outlet 8 by the first plug 11 and the second plug 17, which helps to ensure the sealing performance of the oil outlet 8.

[0061] It should be noted that during the process of the drive screw 25 driving the second connector 17 to insert into the oil outlet 8, if the progress of the threaded connection is slower than the movement progress of the active docking seat 20, the second support spring 24 can elastically yield until the active docking seat 20 moves to the tail end of the drive screw 25, thus avoiding jamming.

[0062] like Figure 4 As shown, in one embodiment, the elastic telescopic rod 15 includes a telescopic seat 1501 and a telescopic rod 1502. The telescopic rod 1502 is slidably inserted into the inside 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.

[0063] The traction assembly includes a traction plate 26, which is fixedly connected to the bottom of the sealing cover 2. A linkage plate 48 is fixedly connected between the traction plate 26 and the telescopic rod 1502. A guide groove 27 is provided on the surface of the linkage plate 48. The guide 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 to connecting plates 29. The two connecting plates 29 are fixedly connected to the surface of the prism 12.

[0064] It should be understood that during the process of the second connector 17 being pulled into the oil outlet 8, the first 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 transverse 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. The linkage plate 48 will pull the sealing cover 2 through the telescopic rod 1502 and the traction pin 28. When the first connector 11 is locked, the sealing cover 2 is pulled to the connection port 702 that is close to the oil pan housing 7.

[0065] like Figure 1 , Figure 5 , Figure 6 , Figures 8 to 10 As 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 has a pull groove 34 at the top. The pull groove 34 has an inclined surface 3401. A pin 35 is fixedly connected to the top of the first vertical plate 3102. The pin 35 passes through the top of the positioning frame 30. A fourth support spring 36 is sleeved on the surface of the 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 pin 35.

[0066] The top of the first support frame 9 and the second support frame 10 are both provided with a relief groove 38. A pressure plate 40 is slidably inserted into the relief groove 38. The pressure plate 40 is slidably inserted into the inner wall of the relief groove 38. A push block 14 is fixedly connected to the end of the pressure plate 40. The push block 14 is in contact with the inclined surface 3401.

[0067] Two positioning heads 39 are fixedly connected to the surface of the positioning plate 37. The two positioning heads 39 contact the edge of the connection port 702 of the sealing cover 2 and the oil pan housing 7, respectively.

[0068] It should be understood that during the process of the sealing cap 2 pressing the connection port 702 of the oil pan 7, the pressure plate 40 will be pressed down. The pressure plate 40 will drive the push block 14 to squeeze the inclined surface 3401, which will pull the first horizontal plate 3101. The first horizontal plate 3101 will drive the insertion pin 35 on the first vertical plate 3102 to move. The insertion pin 35 will drive the positioning plate 37 to approach the side wall of the connection port 702 of the oil pan 7, so as to achieve the four directions of pressing against the side wall of the connection port 702 of the oil pan 7, and center the oil pan 7 and the sealing cap 2 to avoid displacement. This is conducive to achieving precise docking and sealing of the sealing cap 2 and the connection port 702 of the oil pan 7 in the vertical direction.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for testing the air tightness of an automotive oil pan, comprising a support base (1), characterized in that: It also includes a support assembly, a sealing cap (2), an inner sealing plug, an outer sealing plug, a threaded locking assembly, and a pulling assembly. The support assembly is mounted on a support base (1) and is used to support and position the oil pan (7). The sealing cap (2) is located on the top of the oil pan (7). A one-way valve (5) is fixedly connected to the top of the sealing cap (2). A pressure detector (6) is also fixedly inserted into the top of the sealing cap (2). The inner sealing plug is inserted into the oil pan. (7) At the inner opening of the oil outlet (8), the outer sealing plug is set at the outer opening of the oil outlet (8) of the oil pan (7). During the process of the threaded locking assembly connecting the inner sealing plug and the outer sealing plug, the inner sealing plug and the outer sealing plug are pulled, and the inner sealing plug and the outer sealing plug block the inner and outer openings of the oil outlet (8) of the oil pan (7). During the process of the inner sealing plug being inserted into the oil outlet (8) of the oil pan (7), the inner sealing plug is tightened by the pulling assembly to tighten the sealing cover (2). The support assembly includes two first support frames (9) and two second support frames (10). The two first support frames (9) are symmetrically 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 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 in contact with the bottom edge of the oil pan (7), and the top of the support base (1) is in contact with the bottom of the oil pan (7). The inner sealing plug is a first plug (11), which is inserted into the inner opening of the oil outlet (8) of the oil pan (7). A prism (12) is fixedly connected to the surface of the first plug (11), and a connecting 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 connecting seat (13) and the bottom of the sealing cover (2). A first support spring (16) is sleeved on the surface of the prism (12), and the two ends of the first support spring (16) are fixedly connected to the first plug (11) and the connecting seat (13) respectively. The elastic telescopic rod (15) includes a telescopic seat (1501) and a telescopic rod (1502). The telescopic rod (1502) is slidably inserted into the inside of the telescopic seat (1501). A third support spring (1503) is fixedly connected between the bottom of the telescopic rod (1502) and the telescopic seat (1501). The traction assembly includes a traction plate (26), which is fixedly connected to the bottom of the sealing cover (2). A linkage plate (48) is fixedly connected between the traction plate (26) and the telescopic rod (1502). A guide groove (27) is provided on the surface of the linkage plate (48). The guide 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 to connecting plates (29). The two connecting plates (29) are fixedly connected to the surface of the prism (12).

2. The device for detecting the air tightness of an automotive oil pan according to claim 1, characterized in that: The outer sealing plug is a second connector (17), which is inserted into the outer opening of the oil outlet (8) of the oil pan (7).

3. The device for detecting the airtightness of an automotive oil pan according to claim 2, characterized in that: 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 connector (11). The threaded rod (18) is rotatably connected to the end of the second connector (17). One end of the threaded rod (18) is threaded into the threaded hole (19), and the other end of the threaded rod (18) passes through the second connector (17) and extends to the outside of the second connector (17).

4. The device for detecting the air tightness of an automotive oil pan according to claim 3, characterized in that: The threaded locking assembly also includes 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 inserted into the active docking seat (20). The support tube (22) is fixedly connected to the end of the second plug (17) and sleeved on the outside of 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 fixedly connected to the active docking seat (20) and the second plug (17) respectively. The third motor (21) is fixedly installed on the top of the support base (1), and the output end of the third motor (21) is fixedly connected to the drive screw (25). The active docking seat (20) is threaded onto the surface of the drive screw (25).

5. The device for detecting the air tightness of an automotive oil pan according to claim 1, characterized in that: 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 has a pull groove (34) at the top. The pull groove (34) has an inclined surface (3401). The first vertical plate... The top of (3102) is fixedly connected to the plug pin (35), the plug pin (35) passes through the top of the positioning frame (30), the surface of the plug pin (35) is fitted with a fourth support spring (36), the two ends of the fourth support spring (36) are fixedly connected to the first vertical plate (3102) and the positioning frame (30) respectively, and the end of the plug pin (35) is fixedly connected to the positioning plate (37), the positioning plate (37) is in contact with the edge of the sealing cap (2) and the oil pan housing (7) respectively; The top of the first support frame (9) and the second support frame (10) are provided with a relief groove (38). A pressure plate (40) is slidably inserted into the relief groove (38). The pressure plate (40) is slidably inserted into the inner wall of the relief groove (38). A push block (14) is fixedly connected to the end of the pressure plate (40). The push block (14) is in contact with the inclined surface (3401).

6. The device for detecting the airtightness of an automotive oil pan according to claim 5, characterized in that: Two positioning heads (39) are fixedly connected to the surface of the positioning plate (37), and the two positioning heads (39) respectively contact the edge of the sealing cap (2) and the oil pan housing (7).

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