CN211373955U

CN211373955U - Automatic tightening mechanism of air tightness detection equipment

Info

Publication number: CN211373955U
Application number: CN202020182259.3U
Authority: CN
Inventors: 任永军
Original assignee: Shanghai Tongcheng Enterprise Development Co ltd
Current assignee: Shanghai Tongcheng Enterprise Development Co ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2020-08-28
Anticipated expiration: 2030-02-19

Abstract

The utility model relates to an automatic tightening mechanism of air tightness detection equipment, which comprises a detection water tank and a bracket erected on the detection water tank, wherein a tightening assembly is arranged on the bracket, the tightening assembly comprises a vertically arranged tightening motor, a mounting plate arranged on a driving shaft of the tightening motor, and an upper tightening shaft which penetrates through a mounting hole and the mounting hole and is arranged on the side wall of the mounting plate far away from the tightening motor, the upper tightening shaft is in threaded connection with a mounting nut, and one end of the mounting plate far away from the upper tightening shaft is detachably connected with the tightening motor; the vertical assembly used for driving the tightening motor to vertically move is arranged on the support, the vertical assembly comprises a reinforcing plate and a vertical cylinder of the tightening motor, and a horizontal assembly is arranged on the support. The utility model discloses have automatic tightening mechanism, tend to full automatization degree and improve to alleviate workman's intensity of labour, not only improved every screw rod leakproofness, guarantee the uniformity of every screw rod installation simultaneously, improved the effect of the efficiency of installation work piece.

Description

Automatic tightening mechanism of air tightness detection equipment

Technical Field

The utility model belongs to the technical field of the technique of closing plate gas tightness test and specifically relates to an automatic tightening mechanism of airtight check out test set is related to.

Background

The sealing plate of the rotor holder terminal needs to be tested for sealability during the production process. The tightness detection equipment in the prior art adopts a ventilation water testing valve, namely, a workpiece is immersed in water, air is connected to an air connecting hole of the workpiece, and whether a bubbling phenomenon exists or not is judged, so that whether the die-casting box body has leakage phenomena such as air leakage, water leakage and the like or not and the die-casting defects is judged.

At present, the utility model with application publication number CN103196633A discloses an air tightness detection device, which comprises a detection box arranged on a frame, wherein a plurality of detection devices arranged on a detection table are arranged in the detection box, and the detection table is connected with the detection box through a lifting device; the detection device is provided with an inflation device arranged on the vertical support and a plugging device arranged on the inclined support, the inflation device is provided with a plurality of inflation plugging heads, and the inflation plugging heads are respectively connected with the inflation device; the plugging device is provided with a plurality of plugging heads corresponding to the inflatable plugging heads, and the inflatable plugging heads and the plugging heads are connected with independent plugging cylinders; the detection platform is provided with a transverse positioning piece and a vertical positioning piece between the inflation plug and the blocking plug, and each detection device is provided with a quick wrench.

The above prior art solutions have the following drawbacks: when a workpiece is detected, the workpiece needs to be manually placed in the inflating device, then the blocking head seals the workpiece on the inflating device manually, and due to the influence of people, the phenomenon that the sealing plate needs to be reassembled due to poor sealing performance often occurs, so that the labor intensity is high, and the efficiency of the blocking head is low.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an automatic tightening mechanism of airtight check out test set, it has automatic tightening mechanism, and degree of tending to the full automatization improves to alleviate workman's intensity of labour, and not only improved the uniformity that every screw rod installation was guaranteed simultaneously to every screw rod leakproofness, improved the advantage of the efficiency of installation work piece.

The above object of the present invention can be achieved by the following technical solutions: an automatic tightening mechanism of air tightness detection equipment comprises a detection water tank and a support erected on the detection water tank, wherein a tightening assembly used for tightening a sealing element is arranged on the support, the tightening assembly comprises a vertically arranged tightening motor, an installation plate arranged on a driving shaft of the tightening motor, an installation hole is formed in the side wall, away from the tightening motor, of the installation plate, and a tightening shaft penetrates through the installation hole, a mounting nut is connected to the tightening shaft in a threaded manner, and one end, away from the tightening shaft, of the installation plate is detachably connected with the tightening motor; the vertical assembly is used for driving the tightening motor to vertically move and comprises a reinforcing plate and a vertical cylinder, the reinforcing plate is used for fixing the tightening motor, the vertical cylinder is used for driving the reinforcing plate to vertically move up and down, and the support is provided with a horizontal assembly used for driving the vertical cylinder to horizontally move.

Through adopting above-mentioned technical scheme, it is qualified that the detection water tank is used for detecting whether the work piece leaks gas. The tightening motor is used for driving the mounting plate arranged on a driving shaft of the tightening motor to rotate, so that the upper tightening shaft fixedly connected to the mounting hole on the mounting plate is driven to rotate, and the screw rod can be screwed, so that the workpiece is mounted on the air tightness detection equipment; when the next screw is tightened, the vertical cylinder is started, drives the tightening motor and the tightening shaft to slide upwards, then the horizontal assembly pushes the vertical cylinder to move towards the next screw, the vertical cylinder drives the tightening motor and the tightening shaft to move downwards again, and the bottom end of the tightening shaft is aligned with the screw, so that the screw is tightened and fixed; when the screw rod to next row is tightened, start vertical cylinder, vertical cylinder drives the tightening motor and the tightening shaft is to sliding up, then reciprocal subassembly promotes vertical cylinder and moves towards next row screw rod, when reacing next row, vertical cylinder drives the tightening motor again and the tightening shaft moves down to aim at the screw rod with the bottom of going up the tightening shaft, thereby tighten the screw rod fixedly. According to the operation process, the automatic tightening mechanism tends to improve the full automation degree, so that the labor intensity of workers is reduced, the sealing performance of each screw is improved, the installation consistency of each screw is ensured, and the workpiece installation efficiency is improved.

The present invention may be further configured in a preferred embodiment as: the horizontal component comprises a horizontal plate used for fixing the cylinder body part of the vertical cylinder, a horizontal block arranged on the upper frame of the support, a first sliding groove formed in the side wall, close to the horizontal plate, of the horizontal block, a first sliding block which is in sliding fit with the first sliding groove and a horizontal cylinder used for driving the horizontal plate to slide along the length direction of the first sliding groove are arranged on the horizontal plate, and the length direction of the first sliding groove is arranged along the length direction of the horizontal block.

Through adopting above-mentioned technical scheme, horizontal cylinder promotes vertical cylinder and slides along the length direction in the first groove that slides, can carry out horizontal migration with last motor and last axle that promote on the vertical cylinder, thereby can make last axle remove along the length direction in the first groove that slides, thereby guarantee that every screw rod homoenergetic on the work piece can be tightened, can be diversified tighten the screw rod, the efficiency of workpiece setting process has been improved, and alleviate workman's intensity of labour, guarantee that the compactness of every screw rod water conservancy project installation keeps unanimous state.

The present invention may be further configured in a preferred embodiment as: the support is provided with a reciprocating assembly used for driving the horizontal block to move back and forth, the reciprocating assembly comprises a reciprocating block arranged on the support, a second sliding groove formed in the upper end face of the reciprocating block, a second sliding block which is in sliding fit with the second sliding groove and a reciprocating cylinder used for driving the horizontal block to slide along the length direction of the second sliding groove are arranged on the horizontal block, and the length direction of the second sliding groove is arranged along the length direction of the reciprocating block.

Through adopting above-mentioned technical scheme, reciprocating cylinder promotes the support and slides along the length direction in second groove that slides, can remove the tightening motor and the last mandril that promote on the support, thereby the last mandril that can make moves along the length direction in second groove that slides, thereby guarantee that every screw rod homoenergetic on the work piece can be tightened, can be diversified tighten the screw rod, the efficiency of installation has been improved, and alleviate workman's intensity of labour, guarantee the uniformity of every screw rod to the work piece installation.

The present invention may be further configured in a preferred embodiment as: the cylinder body part downwardly extending of vertical cylinder has the deflector, the deflector is vertical to be set up, the guiding hole has been seted up to the deflector, the guiding hole sets up along the vertical direction of deflector, the direction that the reinforcing plate is close to the guiding hole is equipped with the guide block, the guide block with the guiding hole cooperation of sliding.

Through adopting above-mentioned technical scheme, when vertical cylinder during operation to the drive guide block slides along the length direction of guiding hole, can make the length direction of tightening motor along the guiding hole stably slide, and the guide that can stabilize is tightened the axle and is reciprocated, and accurate alignment screw rod can improve the work efficiency that the screw rod was tightened.

The present invention may be further configured in a preferred embodiment as: the first sliding block and the second sliding block are T-shaped, and the first sliding block and the second sliding block are respectively in plug-in fit with the first sliding groove and the second sliding groove.

Through adopting above-mentioned technical scheme, first sliding block, the second sliding block joint that the T-arrangement set up are in first sliding groove, second sliding groove to avoid first sliding block, second sliding block to break away from sliding groove when sliding along first sliding groove, second sliding groove, can improve work efficiency with the steady operation of guaranteeing automatic tightening mechanism.

The present invention may be further configured in a preferred embodiment as: the one end that the mounting panel kept away from last mandril is equipped with the connecting hole, threaded connection has connecting screw in the connecting hole.

By adopting the technical scheme, the mounting plate provided with the upper tightening shaft is mounted on the driving shaft of the tightening motor, then the connecting hole on the mounting plate corresponds to the connecting hole on the driving shaft of the tightening motor, and the mounting plate can be mounted on the driving shaft of the tightening motor by penetrating the connecting screw rod into the connecting hole; meanwhile, different mounting plates can be replaced according to different workpieces to be mounted, and different upper tightening shafts can be mounted, so that the universal matching performance of the whole automatic tightening mechanism is improved.

The present invention may be further configured in a preferred embodiment as: and a gasket is arranged between the mounting plate and the driving shaft of the tightening motor.

Through adopting above-mentioned technical scheme, the setting of gasket, increase mounting panel and the driving shaft of tightening motor frictional force between the two, can further strengthen the relation of connection between mounting panel and the driving shaft of tightening motor, guarantee to go up the stability of mandril on the mounting panel, improve the work efficiency of installation end cap, alleviate workman's working strength.

The present invention may be further configured in a preferred embodiment as: and a waterproof cover is covered on the outer side of the tightening motor.

Through adopting above-mentioned technical scheme, the setting of buckler avoids the water of tightening motor in going on the screw automation in-process water tank to sputter in the tightening motor to avoid being the phenomenon that the short circuit appears in the tightening motor, thereby influence the rotation of tightening motor, can influence the work efficiency of automatic tightening mechanism.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through the arrangement of the tightening assembly, the vertical assembly, the horizontal assembly and the reciprocating assembly, the automatic tightening mechanism tends to improve the full automation degree, so that the labor intensity of workers is reduced, the sealing performance of each screw is improved, the installation consistency of each screw is ensured, and the workpiece installation efficiency is improved;

2. through the setting in first sliding block, second sliding block, first sliding groove and second sliding groove, avoid sliding block slippage from sliding groove, can improve work efficiency with the steady operation of guaranteeing automatic tightening mechanism.

Drawings

FIG. 1 is a schematic structural view of the whole of the present embodiment;

FIG. 2 is a schematic structural view of a tightening assembly of the present embodiment;

FIG. 3 is a schematic structural view of the horizontal member of the present embodiment;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

fig. 5 is a schematic view of the structure between the guide plate, the guide hole, and the guide block in this embodiment.

In the figure, 1, a detection water tank; 2. placing the plate; 3. a clamping plate; 4. a lifting device; 5. a support; 6. tightening the assembly; 7. tightening the motor; 8. mounting a plate; 9. mounting holes; 10. tightening the shaft; 11. connecting holes; 12. connecting a screw rod; 13. a gasket; 14. a lower plate; 15. a vertical plate; 16. an upper plate; 18. mounting a nut; 19. a waterproof cover; 20. a vertical assembly; 21. a reinforcing plate; 22. a vertical cylinder; 23. a horizontal component; 24. a horizontal block; 25. a horizontal plate; 26. a first sliding groove; 27. a first sliding block; 28. a horizontal cylinder; 29. a fixing plate; 30. a push plate; 31. a guide plate; 32. a guide hole; 33. a guide block; 34. a reciprocating assembly; 35. a reciprocating block; 36. connecting blocks; 37. a moving block; 38. a second sliding groove; 39. a second sliding block; 40. a reciprocating cylinder; 41. a third sliding groove; 42. and a third sliding block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Examples

Referring to fig. 1, the automatic tightening mechanism of the air tightness detection device disclosed by the utility model comprises a detection water tank 1, a placing plate 2 is horizontally arranged at the center of the detection water tank 1, a clamping plate 3 is placed on the placing plate 2, and a workpiece is arranged on the clamping plate 3; the side wall of the placing plate 2 close to the detection water tank 1 is provided with a lifting device 4 for driving the placing plate 2 to move up and down. The bracket 5 is arranged above the clamping plate 3, and one end of the bracket 5 is fixedly connected with the lifting device 4; the bracket 5 is provided with a tightening assembly 6 for tightening the seal, i.e. the tightening assembly 6 can be used for tightening and mounting or dismounting the seal on the workpiece.

Referring to fig. 2 and 4, the tightening assembly 6 includes a tightening motor 7, a mounting plate 8, a mounting hole 9, and a tightening shaft 10; the tightening motor 7 is vertically arranged, the mounting plate 8 consists of a lower plate 14, a vertical plate 15 and an upper plate 16, the upper plate 16 and the lower plate 14 are respectively positioned at the upper end and the lower end of the vertical plate 15, the upper plate 16 and the lower plate 14 are both vertical to the vertical plate 15, and the upper plate 16 and the lower plate 14 are parallel to each other; the upper plate 16 is provided with a connecting hole 11, and a connecting screw rod 12 is connected in the connecting hole 11 in a threaded manner, so that the mounting plate 8 is fixed on the driving shaft of the tightening motor 7. A spacer 13 is also provided between the upper plate 16 and the drive shaft of the tightening motor 7, so as to avoid the upper plate 16 coming into direct contact with the tightening motor 7, thus protecting the tightening motor 7. The mounting hole 9 is opened in the lower plate 14, the upper fastening shaft 10 is inserted into the mounting hole 9, and the upper end of the fastening shaft 10 is screwed with the mounting nut 18, thereby fixing the upper fastening shaft 10 to the lower plate 14. Be provided with buckler 19 on the lateral wall of tightening motor 7, the junction cover between the driving shaft of tightening motor 7 and the mounting panel 8 is established with the buckler 19, avoids the water in the detection water tank 1 to sputter to the driving shaft of tightening motor 7 on to the phenomenon of tightening motor 7 short circuit appears, influences the work of tightening motor 7, can influence tightening motor 7 and drive the rotation of tightening shaft 10.

Referring to fig. 2 and 5, a vertical assembly 20 for driving the tightening motor 7 to move in the vertical direction is arranged on the bracket 5, the vertical assembly 20 comprises a reinforcing plate 21 and a vertical cylinder 22, the reinforcing plate 21 is horizontally arranged, and the tightening motor 7 penetrates through the reinforcing plate 21; the vertical cylinder 22 is vertically arranged, and the end of the piston rod of the vertical cylinder 22 is fixedly connected with the upper side surface of the reinforcing plate 21. The bracket 5 is provided with a horizontal assembly 23 for starting the vertical cylinder 22 to move in the horizontal direction, and the horizontal assembly 23 comprises a horizontal block 24, a horizontal plate 25, a first sliding groove 26, a first sliding block 27 and a horizontal cylinder 28; the horizontal block 24 is horizontally arranged, and the horizontal block 24 is erected on the bracket 5; the horizontal plate 25 consists of a fixed plate 29 and a pushing plate 30, the fixed plate 29 and the pushing plate 30 are arranged perpendicular to each other, and the cylinder body part of the vertical cylinder 22 is fixedly connected with the inner side wall of the horizontal plate 25; a guide plate 31 extends downwards from the lower side wall of the fixed plate 29, the guide plate 31 is vertically arranged, two guide holes 32 are formed in the side wall, close to the reinforcing plate 21, of the guide plate 31, the two guide holes 32 are uniformly distributed along the width direction of the guide plate 31, and the length direction of each guide hole 32 is arranged along the length direction of the guide plate 31; the side wall of the reinforcing plate 21 close to the guide holes 32 is provided with two guide blocks 33, each guide block 33 corresponds to one guide hole 32, and the guide blocks 33 are arranged in a T shape and are inserted into the guide holes 32. The vertical cylinder 22 is driven, and the vertical cylinder 22 drives the tightening motor 7 to slide along the length direction of the guide hole 32. The first sliding groove 26 is arranged on the side wall of the horizontal block 24 close to the fixing plate 29, and the length direction of the first sliding groove 26 is arranged along the horizontal direction of the horizontal block 24; the first sliding block 27 is disposed on the side wall of the fixing plate 29 close to the first sliding groove 26, and the first sliding block 27 slides along the length direction of the first sliding groove 26. The horizontal cylinder 28 is horizontally arranged, the end of the piston rod of the horizontal cylinder 28 is fixedly connected with the side wall of the pushing plate 30 far away from the vertical cylinder 22, so that when the horizontal cylinder 28 is started, the piston rod of the horizontal cylinder 28 pushes the horizontal plate 25 to slide along the length direction of the first sliding groove 26, namely, the tightening motor 7 can be pushed to move.

Referring to fig. 2 and 3, both ends of the horizontal block 24 are provided with reciprocating assemblies 34 for driving the horizontal block 24 to move back and forth, and the reciprocating assemblies 34 include a reciprocating block 35, a second sliding groove 38, a second sliding block 39 and a reciprocating cylinder 40. The reciprocating block 35 is composed of a connecting block 36 and two moving blocks 37, the two moving blocks 37 are respectively located at two ends of the connecting block 36, the connecting block 36 is arranged in parallel with the horizontal block 24, the moving blocks 37 and the connecting block 36 are arranged in a mutually perpendicular mode, and the moving blocks 37 and the connecting block 36 are integrally formed. The reciprocating block 35 is erected on the bracket 5, and two ends of the horizontal block 24 are erected on two moving blocks 37; the upper end surfaces of the two moving blocks 37 are provided with second sliding grooves 38, and the length direction of the second sliding grooves 38 is arranged along the length direction of the moving blocks 37; two ends of the horizontal block 24 close to the moving block 37 are provided with second sliding blocks 39, the second sliding blocks 39 are inserted into the second sliding grooves 38, and the second sliding blocks 39 slide along the length direction of the second sliding grooves 38. The cylinder body part of the reciprocating cylinder 40 is fixedly connected to the connecting block 36, the length direction of the reciprocating cylinder 40 is parallel to that of the moving block 37, and the end part of the piston rod of the reciprocating cylinder 40 is fixedly connected with the side surface of the horizontal block 24; the reciprocating cylinder 40 is started, and the piston rod of the reciprocating cylinder 40 pushes the horizontal block 24 to slide along the length direction of the second sliding groove 38. The first sliding block 27 and the second sliding block 39 are both arranged in a T shape, and the first sliding block 27 and the second sliding block 39 are respectively arranged in a mutually inserting and matching manner with the first sliding groove 26 and the second sliding groove 38. The third sliding block 42 is arranged on the side face of the cylinder body part of the horizontal cylinder 28, the third sliding groove 41 is formed in the cylinder body part of the connecting block 36 close to the horizontal cylinder 28, the length direction of the third sliding groove 41 is arranged along the length direction of the connecting block 36, the third sliding groove 41 is parallel to the second sliding groove 38, and the third sliding block 42 and the third sliding groove 41 are used for orienting the movement of the horizontal cylinder 28 and improving the sliding stability of the movement of the horizontal cylinder 28.

The implementation principle of the above embodiment is as follows:

1. firstly, penetrating an upper tightening shaft 10 into a mounting hole 9, fixing the upper tightening shaft 10 on the mounting hole 9, mounting the upper end of a mounting plate 8 on a driving shaft of a tightening motor 7, starting the tightening motor 7, driving the driving shaft of the tightening motor 7 to drive the mounting plate 8 to rotate, rotating the upper tightening shaft 10 to screw a sealing element, and mounting a workpiece on an air tightness detection device;

2. when the next sealing member is tightened, the vertical cylinder 22 is started, the vertical cylinder 22 drives the tightening motor 7 and the tightening shaft 10 to slide upwards, then the horizontal cylinder 28 pushes the vertical cylinder 22 to move towards the next sealing member, the vertical cylinder 22 drives the tightening motor 7 and the tightening shaft 10 to move downwards again, and the bottom end of the tightening shaft 10 is aligned with the sealing member, so that the sealing member is tightened and fixed;

3. when the next row of sealing elements is tightened, the vertical cylinder 22 is started, the vertical cylinder 22 drives the tightening motor 7 and the tightening shaft 10 to slide upwards, then the reciprocating cylinder 40 pushes the bracket 5 to move towards the next row of screw rods, when the next row is reached, the vertical cylinder 22 drives the tightening motor 7 and the tightening shaft 10 to move downwards again, and the bottom end of the tightening shaft 10 is aligned with the sealing elements, so that the sealing elements are tightened and fixed.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An automatic tightening mechanism of airtight detection equipment which characterized in that: the device comprises a detection water tank (1) and a support (5) erected on the detection water tank (1), wherein a tightening assembly (6) used for tightening a sealing element is arranged on the support (5), the tightening assembly (6) comprises a vertically arranged tightening motor (7), a mounting plate (8) arranged on a driving shaft of the tightening motor (7), a mounting hole (9) and a tightening shaft (10) penetrating through the mounting hole (9) are formed in the side wall, far away from the tightening motor (7), of the mounting plate (8), a mounting nut (18) is in threaded connection with the tightening shaft (10), and one end, far away from the tightening shaft (10), of the mounting plate (8) is detachably connected with the tightening motor (7); be equipped with on support (5) and be used for driving vertical subassembly (20) of tightening motor (7) vertical movement, vertical subassembly (20) are including being used for fixing reinforcing plate (21) of tightening motor (7) and vertical cylinder (22) that are used for driving reinforcing plate (21) vertical movement from top to bottom, be equipped with on support (5) and be used for driving vertical cylinder (22) horizontal direction and remove horizontal assembly (23).

2. An automatic tightening mechanism of a gas tightness detecting device according to claim 1, characterized in that: the horizontal assembly (23) comprises a horizontal plate (25) used for fixing the cylinder body part of the vertical cylinder (22), a horizontal block (24) erected on the support (5), a first sliding groove (26) formed in the side wall, close to the horizontal plate (25), of the horizontal block (24), a first sliding block (27) matched with the first sliding groove (26) in a sliding mode and a horizontal cylinder (28) used for driving the horizontal plate (25) to slide along the length direction of the first sliding groove (26) are arranged on the horizontal plate (25), and the length direction of the first sliding groove (26) is arranged along the length direction of the horizontal block (24).

3. An automatic tightening mechanism of an airtight testing apparatus according to claim 2, wherein: be equipped with on support (5) and be used for driving reciprocal subassembly (34) of horizontal piece (24) back-and-forth movement, reciprocal subassembly (34) including set up in reciprocating piece (35) on support (5), second that reciprocating piece (35) up end was seted up some slide groove (38) and horizontal piece (24) be equipped with second slide groove (38) the complex second slide block (39) that slides and be used for driving horizontal piece (24) along reciprocating cylinder (40) that second slide groove (38) length direction slided, the length direction of second slide groove (38) sets up along reciprocating piece (35) length direction.

4. An automatic tightening mechanism of an airtight testing apparatus according to claim 2, wherein: cylinder body part downwardly extending of vertical cylinder (22) has deflector (31), the vertical setting of deflector (31), guiding hole (32) have been seted up in deflector (31), the vertical direction setting of deflector (31) is followed in guiding hole (32), direction that reinforcing plate (21) is close to guiding hole (32) is equipped with guide block (33), guide block (33) with guiding hole (32) cooperation of sliding.

5. An automatic tightening mechanism of a gas tightness detecting device according to claim 3, characterized in that: the first sliding block (27) and the second sliding block (39) are T-shaped, and the first sliding block (27) and the second sliding block (39) are respectively matched with the first sliding groove (26) and the second sliding groove (38) in an inserted mode.

6. An automatic tightening mechanism of a gas tightness detecting device according to claim 1, characterized in that: the one end that last mandril (10) was kept away from in mounting panel (8) is equipped with connecting hole (11), threaded connection has connecting screw (12) in connecting hole (11).

7. An automatic tightening mechanism of an airtight testing apparatus according to claim 6, wherein: and a gasket (13) is arranged between the mounting plate (8) and the driving shaft of the tightening motor (7).

8. An automatic tightening mechanism of a gas tightness detecting device according to claim 1, characterized in that: the outer side cover of the tightening motor (7) is provided with a waterproof cover (19).