Air tightness detection device for bolt type cover of engine

Abstract

The utility model relates to the technical field of engine part detection, and discloses an engine bolt type cover air tightness detection device, which comprises a fixed table, a fixed box fixedly connected to the top of the fixed table, bottom feet fixedly connected to four corners of the bottom of the fixed table, and an air tightness detection mechanism arranged at the top of the fixed table. An auxiliary mechanism is arranged at the top of the fixing table, the air tightness detection mechanism comprises a bolt type cover fixing assembly and an air tightness detection assembly, the bolt type cover fixing assembly is arranged at the top of the fixing table and in the fixing box, the air tightness detection assembly is arranged at the top of the fixing table, and the auxiliary mechanism comprises a lifting assembly and an anti-jamming assembly. The stability of the bolt-type cover can be guaranteed in the airtight detection process, the situation that dislocation of the bolt-type cover affects airtight detection is prevented, the connecting plate is pushed to advance through the push rod, the bolt-type cover can be efficiently fixed through the spring and the fixing plate, the fixing effect is enhanced, and the airtight detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine parts detection, in particular to an engine bolt-type cover air tightness detection device. Background Art

[0002] The engine bonnet (or more commonly known as the engine cover or hood) is an important component of the car body. It is mainly located at the front of the vehicle, covering and protecting the engine compartment. In order to ensure the stability of the internal components, it needs to be tested for airtightness.

[0003] According to an engine crankcase cover air tightness detection device disclosed on the patent website (authorization announcement number: CN220912587U), "This utility model discloses an engine crankcase cover air tightness detection device, comprising a hydraulic top plate, a pressure rod top plate and a device bottom plate, the pressure rod top plate is located above the device bottom plate, the hydraulic top plate is located above the pressure rod top plate, guide columns are provided on the four corners of the device bottom plate, the pressure rod top plate is slidably arranged between the hydraulic top plate and the device bottom plate, a pressing hydraulic cylinder is provided on the hydraulic top plate, and the pressure rod top plate is provided with a pressure cylinder. The lower surface of the plate is equipped with a component pressure rod, a center hole pressure rod, a cavity pressure rod, and an end face pressure block. The upper surface of the device base plate is equipped with a test base plate, which is also equipped with a filler block and a sealing rubber ring. The upper surface of the device base plate is equipped with a side hole plugging cylinder and a gap plugging cylinder. The end of the cylinder rod of each side hole plugging cylinder and the gap plugging cylinder is equipped with a filler block. This engine crankcase cover airtightness test device can quickly and conveniently perform airtightness tests on end face parts such as engine crankcase covers to ensure that they meet actual sealing requirements.

[0004] Based on the above, the applicant believes that the following defects exist:

[0005] The engine crankcase cover air tightness test device includes a hydraulic top plate, a pressure rod top plate and a device bottom plate. It can perform air tightness tests on end face parts such as the engine crankcase cover to ensure that they meet the sealing requirements of actual work. It is quick and convenient. However, the device is not designed with components to fix the test parts. During the air tightness test, the test parts may fall, affecting the efficiency of the air tightness test. Utility Model Content

[0006] The purpose of the utility model is to provide an engine bolt cover air tightness detection device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an engine bolt-type cover air tightness detection device, comprising a fixing platform, a fixing box fixedly connected to the top of the fixing platform, feet fixedly connected to the four corners of the bottom of the fixing platform, an air tightness detection mechanism provided on the top of the fixing platform, an auxiliary mechanism provided on the top of the fixing platform, the air tightness detection mechanism comprising a bolt-type cover fixing assembly and an air tightness detection assembly, the bolt-type cover fixing assembly being arranged at the top of the fixing platform and inside the fixing box, the air tightness detection assembly being arranged at the top of the fixing platform, the auxiliary mechanism comprising a lifting assembly and an anti-jamming assembly, the lifting assembly being arranged at the top of the fixing platform, and the anti-jamming assembly being arranged at the center of the bottom of the fixing platform;

[0008] The bolt-type cover fixing assembly includes a first fixing plate, which is fixedly connected to the center of the front and back sides of the fixing platform, a side plate is fixedly connected to the outer side of the top of the first fixing plate, a push rod is fixedly connected to the inner side of the side plate, a through-hole is opened on the front and back side of the fixing platform, a sealing gasket is fixedly connected to the outer side of the through-hole, the end of the push rod away from the side plate is fixedly connected to the connecting plate, the inner side of the connecting plate is fixedly connected to the spring, and the end of the spring away from the connecting plate is fixedly connected to the fixing plate, which can ensure the stability of the bolt-type cover during the airtightness test and prevent the bolt-type cover from being misplaced and affecting the airtightness test. The connecting plate is pushed forward by the push rod, and the bolt-type cover can be efficiently fixed by the spring and the fixing plate, thereby strengthening the fixing effect and improving the efficiency of the airtightness test.

[0009] Preferably, two groups of airtightness detection mechanisms are provided and are symmetrically distributed on the front and back of the fixing platform.

[0010] Preferably, the push rod passes through the through opening, the spring is arranged at an end of the connecting plate away from the push rod, and the connecting plate, the spring and the fixing plate are arranged inside the fixing platform.

[0011] Preferably, the airtightness detection component includes a second fixing plate, which is fixedly connected to the left end of the back side of the fixing platform, a gas tank is fixedly connected to the top of the second fixing plate, a valve is fixedly connected to the front side of the gas tank, an air pipe is fixedly connected to the front side of the valve, a top cover is provided on the top of the fixing box, a bracket is fixedly connected to the right end of the back side of the top cover, a dashboard is fixedly connected to the top of the bracket, and an air pressure probe is fixedly connected to the front side of the bracket, and the gas is transported to the fixing box through the air pipe to perform airtightness detection. During the airtightness detection process, the air pressure probe can be used to detect the internal pressure of the fixing box, thereby detecting whether there is an air leakage, thereby further enhancing the detection efficiency of the device.

[0012] Preferably, one end of the air pipe away from the valve is fixedly connected to the left end of the back of the fixing box, and the air pressure probe is arranged inside the top cover.

[0013] Preferably, the lifting assembly includes a fixed connecting plate, the fixed connecting plate is arranged on the top of the fixed platform, screws are rotatably connected at the rear ends on the left and right sides between the fixed platform and the fixed connecting plate, guide rods are fixedly connected at the front ends on the left and right sides between the fixed connecting plate and the fixed platform, sliding sleeves are slidably connected on the surfaces of the screws and guide rods, a top cover is provided on the top of the fixed box, the inner side of the sliding sleeve is fixedly connected to the left and right sides of the top cover, pulley 1 is provided at the left end of the top of the fixed connecting plate, pulley 2 is provided at the right end of the top of the fixed connecting plate, a transmission belt is connected between the pulley 1 and the pulley 2, and a motor is provided on the top of the pulley 1.

[0014] Preferably, the pulley 1 and the pulley 2 are fixedly connected to the top of the screw, and the pulley 1 is rotatably connected to the bottom output end of the motor.

[0015] Preferably, the anti-stuck assembly includes a fixed box, which is fixedly connected to the bottom center of the fixed platform, and connecting vertical plates are fixedly connected to the left and right sides of the fixed box, and a two-way screw is rotatably connected to the inner side of the connecting vertical plate. A control motor is provided on the right side of the connecting vertical plate, and a fixing rod is fixedly connected to the inner side of the connecting vertical plate, and sliding sleeves are slidably connected to the left and right ends of the two-way screw and the surface of the fixed rod, and a connecting arm is fixedly connected to the top of the sliding sleeve, and the end of the connecting arm away from the fixed rod is fixedly connected to the main board, and the left and right sides of the top of the main board are fixedly connected to support frames, and a telescopic column is fixedly connected to the top center of the main board, and a lifting column is fixedly connected to the top of the telescopic column. A bottom plate is provided at the bottom of the fixed box, and a lifting hole is opened on the surface of the bottom plate.

[0016] Preferably, the bidirectional screw is rotatably connected to the left output end of the control motor, and the bidirectional screw is arranged on the back of the fixed rod.

[0017] Preferably, the lifting columns are arranged at the bottom of the lifting holes, and four groups of the lifting columns and lifting holes are arranged.

[0018] Compared with the prior art, the present invention provides an engine bolt cover air tightness detection device, which has the following beneficial effects:

[0019] 1. The engine bolt cover air tightness test device is provided with a bolt cover fixing assembly, which can ensure the stability of the bolt cover during the air tightness test and prevent the bolt cover from being misplaced and affecting the air tightness test. The connecting plate is pushed forward by the push rod, and the bolt cover can be efficiently fixed by the spring and the fixing plate, thereby strengthening the fixing effect and improving the efficiency of the air tightness test.

[0020] 2. The engine bolt cover air tightness detection device is provided with an air tightness detection component, which transports gas to the interior of the fixed box through the air pipe for air tightness detection. During the air tightness detection process, the pressure inside the fixed box can be detected by the air pressure probe to detect whether there is any air leakage, thereby further enhancing the detection efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work.

[0022] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structural bolt-type cover fixing assembly of the utility model;

[0024] Figure 3 This is a schematic diagram of the back side of the structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the bottom structure of the utility model;

[0026] Figure 5 This is a schematic diagram of the anti-jamming component of the utility model structure;

[0027] Figure 6 This is a schematic diagram of the interior of the structural fixing box of the utility model.

[0028] In the figure: 1. fixing platform; 2. foot; 3. fixing box; 31. bottom plate; 4. top cover; 5. airtightness detection mechanism; 51. bolt cover fixing assembly; 511. first fixing plate; 512. side plate; 513. push rod; 514. through-hole; 515. sealing gasket; 516. connecting plate; 517. spring; 518. fixing plate; 52. airtightness detection assembly; 521. second fixing plate; 522. gas tank; 523. valve; 524. air pipe; 525. bracket; 526. instrument panel; 527. air pressure probe; 6. auxiliary Auxiliary mechanism; 61, lifting assembly; 611, fixed connecting plate; 612, screw; 613, guide rod; 614, sliding sleeve; 615, pulley 1; 616, pulley 2; 617, transmission belt; 618, motor; 62, anti-jamming assembly; 621, fixed box; 622, connecting vertical plate; 623, bidirectional screw; 624, control motor; 625, fixed rod; 626, sliding sleeve; 627, connecting arm; 628, main board; 629, support frame; 6201, telescopic column; 6202, lifting column; 6203, lifting hole. 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] The utility model provides the following technical solutions:

[0032] Example 1

[0033] See also Figure 1-3 An engine bolt cover air tightness detection device includes a fixing platform 1, a fixing box 3 is fixedly connected to the top of the fixing platform 1, and base feet 2 are fixedly connected to the four corners of the bottom of the fixing platform 1. An air tightness detection mechanism 5 is provided on the top of the fixing platform 1, and an auxiliary mechanism 6 is provided on the top of the fixing platform 1. The air tightness detection mechanism 5 includes a bolt cover fixing component 51 and an air tightness detection component 52. The bolt cover fixing component 51 is provided on the top of the fixing platform 1 and inside the fixing box 3. The air tightness detection component 52 is provided on the top of the fixing platform 1. The auxiliary mechanism 6 includes a lifting component 61 and an anti-jamming component 62. The lifting component 61 is provided on the top of the fixing platform 1, and the anti-jamming component 62 is provided at the center of the bottom of the fixing platform 1.

[0034] The bolt cover fixing assembly 51 includes a first fixing plate 511, which is fixedly connected to the center of the front and back sides of the fixing platform 1. The outer side of the top of the first fixing plate 511 is fixedly connected to a side plate 512, and the inner side of the side plate 512 is fixedly connected to a push rod 513. The front and back sides of the fixing platform 1 are provided with through-holes 514, and the outer side of the through-holes 514 is fixedly connected to a sealing gasket 515. The end of the push rod 513 away from the side plate 512 is fixedly connected to a connecting plate 516, and the inner side of the connecting plate 516 is fixedly connected to a spring 517. The end of the spring 517 away from the connecting plate 516 is fixedly connected to a fixing plate 518, which can ensure the stability of the bolt cover during the airtightness test and prevent the bolt cover from being misplaced and affecting the airtightness test. The connecting plate 516 is pushed forward by the push rod 513, and the bolt cover can be efficiently fixed by the spring 517 and the fixing plate 518, thereby strengthening the fixing effect and improving the efficiency of the airtightness test.

[0035] There are two sets of airtightness detection mechanisms 5, which are symmetrically distributed on the front and back of the fixing platform 1;

[0036] The push rod 513 passes through the through hole 514, and the spring 517 is arranged at the end of the connecting plate 516 away from the push rod 513. The connecting plate 516, the spring 517 and the fixing plate 518 are arranged inside the fixing platform 1;

[0037] The airtightness detection component 52 includes a second fixing plate 521, which is fixedly connected to the left end of the back of the fixing platform 1. A gas tank 522 is fixedly connected to the top of the second fixing plate 521, a valve 523 is fixedly connected to the front of the gas tank 522, and an air pipe 524 is fixedly connected to the front of the valve 523. A top cover 4 is provided on the top of the fixing box 3, a bracket 525 is fixedly connected to the right end of the back of the top cover 4, a dashboard 526 is fixedly connected to the top of the bracket 525, and an air pressure probe 527 is fixedly connected to the front of the bracket 525. Gas is transported to the interior of the fixing box 3 through the air pipe 524 for airtightness detection. During the airtightness detection process, the pressure inside the fixing box 3 can be detected by the air pressure probe 527 to detect whether there is an air leak, thereby further enhancing the detection efficiency of the device;

[0038] One end of the air pipe 524 away from the valve 523 is fixedly connected to the left end of the back of the fixing box 3 , and the air pressure probe 527 is arranged inside the top cover 4 .

[0039] Example 2

[0040] See also Figure 3-6, and on the basis of Example 1, it is further obtained that the lifting component 61 includes a fixed connecting plate 611, the fixed connecting plate 611 is arranged on the top of the fixed platform 1, and the rear ends of the left and right sides between the fixed platform 1 and the fixed connecting plate 611 are rotatably connected with screw rods 612, the front ends of the left and right sides between the fixed connecting plate 611 and the fixed platform 1 are fixedly connected with guide rods 613, and the surfaces of the screws 612 and the guide rods 613 are slidably connected with sliding sleeves 614, a top cover 4 is provided on the top of the fixed box 3, and the inner side of the sliding sleeve 614 is fixedly connected to the left and right sides of the top cover 4, a pulley 1 615 is provided at the left end of the top of the fixed connecting plate 611, and a pulley 2 616 is provided at the right end of the top of the fixed connecting plate 611, a transmission belt 617 is connected between the pulley 1 615 and the pulley 2 616, and a motor 618 is provided on the top of the pulley 1 615;

[0041] Pulley 1 615 and pulley 2 616 are fixedly connected to the top of the screw 612, and pulley 1 615 is rotatably connected to the bottom output end of the motor 618;

[0042] The anti-stuck assembly 62 includes a fixed box 621, which is fixedly connected to the bottom center of the fixed platform 1. Connecting vertical plates 622 are fixedly connected to the left and right sides of the fixed box 621. A bidirectional screw 623 is rotatably connected to the inner side of the connecting vertical plate 622. A control motor 624 is provided on the right side of the connecting vertical plate 622. A fixing rod 625 is fixedly connected to the inner side of the connecting vertical plate 622. Sliding sleeves 626 are slidably connected to the left and right ends of the bidirectional screw 623 and the fixed rod 625. A connecting arm 627 is fixedly connected to the top of the sliding sleeve 626. The end of the connecting arm 627 away from the fixing rod 625 is fixedly connected to the main board 628. Support frames 629 are fixedly connected to the left and right sides of the top of the main board 628. A telescopic column 6201 is fixedly connected to the top center of the main board 628. A lifting column 6202 is fixedly connected to the top of the telescopic column 6201. A bottom plate 31 is provided at the bottom of the fixed box 3. A lifting hole 6203 is opened on the surface of the bottom plate 31.

[0043] The bidirectional screw 623 is rotatably connected to the left output end of the control motor 624 and is disposed on the back of the fixed rod 625;

[0044] The lifting columns 6202 are arranged at the bottom of the lifting holes 6203 , and there are four groups of lifting columns 6202 and lifting holes 6203 .

[0045] In the actual operation process, the bolt cover is placed inside the fixed box 3. During the airtightness test, the bolt cover is ensured to be stable to prevent the bolt cover from being misplaced and affecting the airtightness test. The push rod 513 pushes the connecting plate 516 forward, and the spring 517 and the fixing plate 518 can effectively fix the bolt cover, strengthen the fixing effect, and improve the efficiency of the airtightness test. The valve 523 is opened and the gas is transported to the inside of the fixed box 3 through the air pipe 524 for airtightness test. During the airtightness test, the pressure inside the fixed box 3 can be detected by the air pressure probe 527 to detect whether there is a In the event of air leakage, the detection efficiency of the device is further enhanced. After the detection is completed, the motor 618 drives the pulley 1 615 to rotate, and the transmission belt 617 drives the pulley 2 616 to rotate, thereby realizing the rotation of the screw 612, lifting the sliding sleeve 614 and the top cover 4, and starting the anti-jamming component 62. By controlling the motor 624 to drive the bidirectional screw 623 to rotate, the sliding sleeve 626 moves, and the connecting arm 627 rises, the telescopic column 6201 is controlled to push up the bolt cover through the lifting column 6202 to prevent it from being stuck inside the fixed box 3 and difficult to remove. Then the staff can take out the cover.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. An engine bolt cover air tightness detection device, comprising a fixing platform (1), characterized in that: The top of the fixed platform (1) is fixedly connected to a fixed box (3), and the four corners of the bottom of the fixed platform (1) are fixedly connected to base feet (2). The top of the fixed platform (1) is provided with an airtightness detection mechanism (5), and the top of the fixed platform (1) is provided with an auxiliary mechanism (6). The airtightness detection mechanism (5) includes a bolt-type cover fixing component (51) and an airtightness detection component (52). The bolt-type cover fixing component (51) is provided at the top of the fixed platform (1) and inside the fixed box (3). The airtightness detection component (52) is provided at the top of the fixed platform (1). The auxiliary mechanism (6) includes a lifting component (61) and an anti-jamming component (62). The lifting component (61) is provided at the top of the fixed platform (1), and the anti-jamming component (62) is provided at the center of the bottom of the fixed platform (1). The bolt-type cover fixing assembly (51) includes a first fixing plate (511), the first fixing plate (511) is fixedly connected to the center of the front and back sides of the fixing platform (1), the top outer side of the first fixing plate (511) is fixedly connected to a side plate (512), the inner side of the side plate (512) is fixedly connected to a push rod (513), the front and back sides of the fixing platform (1) are provided with through openings (514), the outer side of the through opening (514) is fixedly connected to a sealing gasket (515), the end of the push rod (513) away from the side plate (512) is fixedly connected to a connecting plate (516), the inner side of the connecting plate (516) is fixedly connected to a spring (517), and the end of the spring (517) away from the connecting plate (516) is fixedly connected to the fixing plate (518).

2. The engine bolt cover airtightness detection device according to claim 1, characterized in that: The airtightness detection mechanisms (5) are provided in two groups and are symmetrically distributed on the front and back sides of the fixing platform (1).

3. The engine bolt cover air tightness detection device according to claim 1, characterized in that: The push rod (513) passes through the through opening (514), the spring (517) is arranged at one end of the connecting plate (516) away from the push rod (513), and the connecting plate (516), the spring (517) and the fixing plate (518) are arranged inside the fixing platform (1).

4. The engine bolt cover air tightness detection device according to claim 1, characterized in that: The airtightness detection assembly (52) comprises a second fixing plate (521), the second fixing plate (521) is fixedly connected to the left end of the back side of the fixing platform (1), the top of the second fixing plate (521) is fixedly connected to a gas storage tank (522), the front side of the gas storage tank (522) is fixedly connected to a valve (523), the front side of the valve (523) is fixedly connected to an air pipe (524), the top of the fixing box (3) is provided with a top cover (4), the right end of the back side of the top cover (4) is fixedly connected to a bracket (525), the top of the bracket (525) is fixedly connected to a dashboard (526), ​​and the front side of the bracket (525) is fixedly connected to an air pressure probe (527).

5. The engine bolt cover airtightness detection device according to claim 4, characterized in that: One end of the air pipe (524) away from the valve (523) is fixedly connected to the left end of the back side of the fixed box (3), and the air pressure probe (527) is arranged inside the top cover (4).

6. The engine bolt cover airtightness detection device according to claim 1, characterized in that: The lifting assembly (61) comprises a fixed connecting plate (611), the fixed connecting plate (611) being arranged on the top of the fixed platform (1), screw rods (612) being rotatably connected at the rear ends of the left and right sides between the fixed platform (1) and the fixed connecting plate (611), guide rods (613) being fixedly connected at the front ends of the left and right sides between the fixed connecting plate (611) and the fixed platform (1), sliding sleeves (614) being slidably connected on the surfaces of the screw rods (612) and the guide rods (613), a top cover (4) being arranged on the top of the fixed box (3), the inner side of the sliding sleeve (614) being fixedly connected to the left and right sides of the top cover (4), a pulley 1 (615) being arranged at the left end of the top of the fixed connecting plate (611), a pulley 2 (616) being arranged at the right end of the top of the fixed connecting plate (611), a transmission belt (617) being transmission-connected between the pulley 1 (615) and the pulley 2 (616), and a motor (618) being arranged at the top of the pulley 1 (615).

7. The engine bolt cover airtightness detection device according to claim 6, characterized in that: The pulley 1 (615) and the pulley 2 (616) are fixedly connected to the top of the screw rod (612), and the pulley 1 (615) is rotatably connected to the bottom output end of the motor (618).

8. The engine bolt cover airtightness detection device according to claim 1, characterized in that: The anti-jamming assembly (62) includes a fixed box (621), the fixed box (621) is fixedly connected to the bottom center of the fixed platform (1), the fixed box (621) is fixedly connected to the left and right sides of the fixed box (621), the inner side of the connecting vertical plate (622) is rotatably connected to a bidirectional screw (623), the right side of the connecting vertical plate (622) is provided with a control motor (624), the inner side of the connecting vertical plate (622) is fixedly connected to a fixing rod (625), and the left and right ends of the bidirectional screw (623) and the fixing rod (625) are slidably connected to sliding sleeves ( 626), the top of the sliding sleeve (626) is fixedly connected to a connecting arm (627), one end of the connecting arm (627) away from the fixing rod (625) is fixedly connected to a main board (628), the left and right sides of the top of the main board (628) are fixedly connected to support frames (629), the top center of the main board (628) is fixedly connected to a telescopic column (6201), the top of the telescopic column (6201) is fixedly connected to a lifting column (6202), and the bottom of the interior of the fixed box (3) is provided with a bottom plate (31), and a lifting hole (6203) is opened on the surface of the bottom plate (31).

9. The engine bolt cover airtightness detection device according to claim 8, characterized in that: The bidirectional screw (623) is rotatably connected to the left output end of the control motor (624), and the bidirectional screw (623) is arranged on the back of the fixed rod (625).

10. The engine bolt cover airtightness detection device according to claim 8, characterized in that: The lifting columns (6202) are arranged at the bottom of the lifting holes (6203), and four groups of the lifting columns (6202) and the lifting holes (6203) are provided.

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