阅读说明：本技术 一种用于气密性测试的异形接口充气密封装置 (A special-shaped interface inflatable seal device for gas tightness test ) 是由 余朝阳 张吉伦 于 2021-03-05 设计创作，主要内容包括：本发明涉及一种用于气密性测试的异形接口充气密封装置,包含支架、设置在支架上的壳体、设置在壳体内的充气密封组件、设置在支架上用于驱动充气密封组件的气缸；所述充气密封组件包括尾部与气缸驱动端连接的U形架、设置在U形架内的滑块、设置在滑块内端和U形架尾部之间的弹簧、设置在滑块外端的导柱、设置在U形架头部且套设在导柱上的挤压块、设置在挤压块上且套设在导柱上的挤压部、设置在导柱头部且直径大于导柱直径的限位件、套设在导柱上且位于挤压部和限位件之间的密封圈；所述导柱内设置有沿导柱长度方向放置的充气孔；本发明由于充气密封机构采用内胀紧进行密封,能有效对异形接口进行密封,从而提高测试精度。(The invention relates to an inflation sealing device for a special-shaped interface for air tightness test, which comprises a bracket, a shell arranged on the bracket, an inflation sealing assembly arranged in the shell, and an air cylinder arranged on the bracket and used for driving the inflation sealing assembly; the inflatable sealing assembly comprises a U-shaped frame, a sliding block, a spring, a guide post, an extrusion block, an extrusion part, a limiting part and a sealing ring, wherein the tail part of the U-shaped frame is connected with the driving end of the air cylinder; the guide post is internally provided with an inflation hole which is arranged along the length direction of the guide post; according to the invention, the inflation sealing mechanism adopts internal expansion for sealing, so that the special-shaped interface can be effectively sealed, and the test precision is improved.)

1. The utility model provides a sealing device is aerifyd to dysmorphism interface for gas tightness test which characterized in that: the pneumatic sealing device comprises a bracket, a shell arranged on the bracket and provided with an opening at the outer end, a pneumatic sealing assembly arranged in the shell, and a cylinder arranged on the bracket and used for driving the pneumatic sealing assembly to move towards the outer end of the shell; the inflatable sealing assembly comprises a U-shaped frame, a sliding block, a spring, a guide post, an extrusion block, an extrusion part, a limiting part, a sealing ring, a first limiting unit and a second limiting unit, wherein the tail part of the U-shaped frame is connected with the driving end of the air cylinder; the guide post is internally provided with an inflation hole which is arranged along the length direction of the guide post; an air pipe interface is arranged on the sliding block; the air pipe interface is communicated with the inflation hole and is connected with the leakage tester through a hose.

2. The special-shaped interface inflation sealing device for airtightness test according to claim 1, wherein: lubricating grooves are formed in the surfaces of the U-shaped frame, the sliding block and the guide pillar; and lubricating oil is arranged in the lubricating groove.

3. The special-shaped interface inflation sealing device for airtightness test according to claim 2, wherein: the lubricating groove is wavy.

4. The special-shaped interface inflation sealing device for airtightness test according to claim 3, wherein: the limiting piece is fixed at the head of the guide pillar through a bolt; the bolt and the guide pillar are coaxially arranged, and a through hole communicated with the inflation hole is formed in the bolt.

5. The special-shaped interface inflation sealing device for airtightness test according to claim 4, wherein: the cross section of the guide post is polygonal.

6. The special-shaped interface inflation sealing device for the airtightness test according to any one of claims 1 to 5, wherein: the first limiting unit comprises at least one first limiting groove which is arranged on the shell and placed along the moving direction of the sliding block, and at least one first cam bearing follower which is arranged at the top or the bottom of the sliding block and is positioned in the first limiting groove; the second limiting unit comprises at least one second limiting groove arranged on the U-shaped frame and placed along the moving direction of the sliding block and at least one second cam bearing follower arranged on the side surface of the sliding block and positioned in the second limiting groove.

7. The special-shaped interface inflation sealing device for airtightness test according to claim 6, wherein: and cover plates for covering the first limiting groove and the second limiting groove are correspondingly arranged on the shell and the U-shaped frame.

8. The shaped interface inflatable sealing device for air tightness test of claim 7, wherein: the driving end of the air cylinder is provided with a T-shaped groove; the tail part of the U-shaped frame is provided with a T-shaped part which can be clamped into the T-shaped groove.

Technical Field

The invention relates to the field of air tightness test, in particular to an inflation sealing device for an irregular interface for air tightness test.

Background

At present, many electronic switches require internal waterproofing, so that after the electronic switches are produced, a leakage test needs to be carried out, specifically, a leakage tester is used for inflating the inside of the electronic switches through an interface, the air pressure is 20KPa, and the pressure is maintained for 1S, if the electronic switches do not leak air, the products are qualified, otherwise, if the electronic switches leak air, the products are unqualified; however, some electronic switch interfaces have an opposite structure, so that when the leakage tester is connected with the electronic switch interfaces, the sealing performance is poor, and the testing precision is seriously influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a special-shaped interface inflation sealing device for air tightness test.

In order to achieve the purpose, the invention adopts the technical scheme that: a special-shaped interface inflatable sealing device for air tightness testing comprises a support, a shell, an inflatable sealing assembly and an air cylinder, wherein the shell is arranged on the support and provided with an opening at the outer end; the inflatable sealing assembly comprises a U-shaped frame, a sliding block, a spring, a guide post, an extrusion block, an extrusion part, a limiting part, a sealing ring, a first limiting unit and a second limiting unit, wherein the tail part of the U-shaped frame is connected with the driving end of the air cylinder; the guide post is internally provided with an inflation hole which is arranged along the length direction of the guide post; an air pipe interface is arranged on the sliding block; the air pipe interface is communicated with the inflation hole and is connected with the leakage tester through a hose.

Preferably, lubricating grooves are formed in the surfaces of the U-shaped frame, the sliding block and the guide post; and lubricating oil is arranged in the lubricating groove.

Preferably, the lubrication grooves are wavy.

Preferably, the limiting piece is fixed on the head of the guide pillar through a bolt; the bolt and the guide pillar are coaxially arranged, and a through hole communicated with the inflation hole is formed in the bolt.

Preferably, the cross section of the guide pillar is polygonal.

Preferably, the first limiting unit comprises at least one first limiting groove arranged on the shell and placed along the moving direction of the sliding block, and at least one first cam bearing follower arranged at the top or the bottom of the sliding block and positioned in the first limiting groove; the second limiting unit comprises at least one second limiting groove arranged on the U-shaped frame and placed along the moving direction of the sliding block and at least one second cam bearing follower arranged on the side surface of the sliding block and positioned in the second limiting groove.

Preferably, the shell and the U-shaped frame are correspondingly provided with cover plates for covering the first limiting groove and the second limiting groove.

Preferably, a T-shaped groove is formed at the driving end of the air cylinder; the tail part of the U-shaped frame is provided with a T-shaped part which can be clamped into the T-shaped groove.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

according to the invention, the inflation sealing mechanism adopts internal expansion for sealing, so that the special-shaped interface can be effectively sealed, and the test precision is improved.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1 is a schematic structural diagram of the special-shaped interface inflatable sealing device for air tightness test according to the invention;

FIG. 2 is a schematic structural view of the special-shaped interface inflatable sealing device for air tightness test with part of the housing removed;

FIG. 3 is a schematic structural view of the special-shaped interface inflatable sealing device for air tightness test according to the present invention with the housing removed;

FIG. 4 is a schematic structural view of a U-shaped frame and an extrusion block of the present invention;

FIG. 5 is a schematic structural view of a slider according to the present invention;

fig. 6 is a partial working schematic view of the special-shaped interface inflation sealing device for air tightness test.

Wherein: 1. a support; 2. a cylinder; 21. a T-shaped slot; 3. a housing; 4. a cover plate; 5. an inflatable seal assembly; 50. a bolt; 501. a through hole; 51. a U-shaped frame; 511. a lubrication groove; 512. a T-piece; 52. a first limit unit; 521. a first limit groove; 522. a first cam bearing follower; 53. a second limit unit; 531. a second limit groove; 532. a second cam bearing follower; 54. extruding the block; 541. a pressing section; 55. a slider; 551. a tracheal tube interface; 56. a spring; 57. a guide post; 571. an inflation hole; 58. a seal ring; 59. a limiting member; 6. a hose.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

Fig. 1-6 show an inflation sealing device with a special-shaped interface for air tightness testing according to the present invention, which comprises a bracket 1, a housing 3 disposed on the bracket 1 and having an opening at an outer end, an inflation sealing assembly 5 disposed in the housing 3, and an air cylinder 2 disposed on the bracket 1 and used for driving the inflation sealing assembly 5 to move toward the outer end of the housing 3; the inflation sealing assembly 5 comprises a U-shaped frame 51, the tail part of which is connected with the driving end of the cylinder 2, a sliding block 55 arranged in the U-shaped frame 51, a spring 56 arranged between the inner end of the sliding block 55 and the tail part of the U-shaped frame 51, a guide post 57 arranged at the outer end of the sliding block 55, a pressing block 54 arranged at the head part of the U-shaped frame 51 and sleeved on the guide post 57, a pressing part 541 arranged on the pressing block 54 and sleeved on the guide post 57, a limiting part 59 arranged at the head part of the guide post 57 and having a diameter larger than that of the guide post 57, a sealing ring 58 arranged on the guide post 57 and positioned between the pressing part 541 and the limiting part 59, first limiting units 52 respectively arranged at the top part and the bottom part of the sliding block 55, and second; an air charging hole 571 arranged along the length direction of the guide post 57 is arranged in the guide post 57; an air pipe interface 551 is arranged on the sliding block 55; the air pipe interface 551 is communicated with the inflation hole 571 and is connected with the f620 leakage tester through a hose 6; when in work: the air cylinder 2 drives the inflatable sealing assembly 5 to move towards the product direction, after the sealing ring 58 enters the product interface, the first limiting unit 52 limits the sliding block 55, and prevents the limiting piece 59, the guide post 57 and the sliding block 55 from continuously moving towards the product direction, because the spring 56 is arranged between the inner end of the sliding block 55 and the tail of the U-shaped frame 51, and the extrusion block 54 is sleeved on the guide post 57, when the air cylinder 2 continuously drives the U-shaped frame 51 to move towards the product direction, the U-shaped frame 51 can drive the extrusion block 54 to extrude the sealing ring 58 through the extrusion part 541, so that the sealing ring 58 deforms and expands outwards and is contacted with the inner wall of the product interface to realize sealing, at the moment, the second limiting unit 53 limits the U-shaped frame 51 to prevent the extrusion part 541 from continuously extruding and damaging the sealing; finally, the f620 leakage tester sequentially inflates the product through the hose 6 and the guide post 57 to test.

Further, the surfaces of the U-shaped frame 51, the sliding block 55 and the guide post 57 are all provided with lubricating grooves 511; the lubricating groove 511 is internally provided with solid lubricating oil, so that the lubricating effect is achieved, and the service life of the inflatable sealing component 5 is prolonged.

Furthermore, the lubricating groove 511 is wavy, and the lubricating effect is better.

Further, the stopper 59 is fixed to the head of the guide post 57 by a bolt 50; the bolt 50 and the guide pillar 57 are coaxially arranged, and a through hole 501 communicated with the inflation hole 571 is formed in the bolt 50; this structure not only facilitates installation and maintenance of the stopper 59, but also makes the overall structure more compact.

Further, the cross section of the guide post 57 is rectangular, which is convenient for processing a lubricating groove 511 on the surface.

Further, the first limiting unit 52 includes two first limiting grooves 521 disposed on the housing 3 and disposed along the moving direction of the sliding block 55, and four first cam bearing followers 522 disposed on the top or bottom of the sliding block 55 and disposed in the first limiting grooves 521; the second limiting unit 53 comprises a second limiting groove 531 which is arranged on the U-shaped frame 51 and is placed along the moving direction of the slide block 55, and two second cam bearing followers 532 which are arranged on the side surface of the slide block 55 and are positioned in the second limiting groove 531; when in work: because the first limiting groove 521 and the second limiting groove 531 are long, the first cam bearing follower 522 and the second cam bearing follower 532 can only slide in the first limiting groove 521 and the second limiting groove 531 correspondingly, so that the limiting effect is achieved; the movable range of the slider 55 and the U-shaped frame 51 is determined by the lengths of the first limiting groove 521 and the second limiting groove 531, and the movable range of the slider 55 and the U-shaped frame 51 can be changed by adjusting the lengths of the first limiting groove 521 and the second limiting groove 531.

Further, the cover plates 4 for covering the first limiting groove 521 and the second limiting groove 531 are correspondingly arranged on the shell 3 and the U-shaped frame 51, so that a sealing effect is achieved, dust, impurities and the like are prevented from falling into the inflatable sealing assembly 5, abrasion is reduced, and the service life is prolonged.

Further, a T-shaped groove 21 is arranged at the driving end of the air cylinder 2; the tail of the U-shaped frame 51 is provided with a T-shaped piece 512 which can be clamped in the T-shaped groove 21, so that the quick replacement and the maintenance are convenient.

The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.