CN211855747U

CN211855747U - Air tightness testing device

Info

Publication number: CN211855747U
Application number: CN202020836467.0U
Authority: CN
Inventors: 姜德志; 余迪超; 吴海生; 李波
Original assignee: Upton Automation Systems Guangzhou Co ltd
Current assignee: Upton Automation Systems Guangzhou Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-11-03
Anticipated expiration: 2030-05-18

Abstract

The utility model discloses an air tightness testing device, which comprises a frame, wherein a workbench is arranged on the frame, at least one set of air tightness testing mechanism is arranged on the workbench, and the air tightness testing mechanism comprises a mounting plate fixedly arranged on the workbench, a Y-axis sliding mechanism, a Z-axis lifting mechanism and a sealing clamp; the Y-axis sliding mechanism comprises a guide rail, a sliding seat and a rodless cylinder, and an outer sliding block of the rodless cylinder is fixedly connected with one end of the sliding seat; the Z-axis lifting mechanism comprises a lower pressing plate and a Z-axis driving device for driving the lower pressing plate to move along the Z-axis direction; the sealing clamp comprises an upper clamp and a lower clamp, the upper clamp is fixedly connected with the lower pressing plate in a detachable connection mode, and the lower clamp is fixedly connected with the sliding seat in a detachable connection mode; the utility model has the characteristics of compact structure, reasonable layout, convenient assembly and disassembly, good reliability, and suitability for other products by replacing the upper clamp and the lower clamp; furthermore, the method has the characteristics of good stability, good test accuracy and high test efficiency.

Description

Air tightness testing device

Technical Field

The utility model relates to an air tightness check out test set technical field, concretely relates to air tightness testing arrangement.

Background

The intelligent watch is built in with an intelligent system, carries a smart phone system and is connected to a network to realize multifunction, and can synchronize telephones, short messages, mails, photos, music and the like in the mobile phone, so the intelligent watch is more and more popular with consumers. Before the wrist-watch leaves the factory, must carry out the leakproofness test to call socket, microphone, backplate control module, reset key, volume key, press adjust the button, rotation adjust the button etc. on the wrist-watch to seal to the intelligence wrist-watch product, waterproof data are gathered and are judged, stop the defective products and flow out.

In the prior art, the patent of invention with application number CN201611238296.6 discloses an air tightness detection jig, which comprises a bottom plate, a carrier slidably mounted on the top of the bottom plate, and a driving device capable of driving the carrier to move, wherein the top of the bottom plate is provided with a pressing mechanism, and the carrier is provided with a lower sealing cavity; the lower sealing cavity comprises a sealing part, and a product and a side face follow-up mechanism capable of sealing the right side face of the product are arranged in the sealing part; the bottom of a lower pressure plate of the lower pressure mechanism is provided with a sealing top plate; the bottom of the sealing top plate is provided with an upper sealing cavity capable of sealing the lower sealing cavity, the bottom of the sealing top plate and the position of the upper sealing cavity are provided with a sealing piece capable of sealing a product, and the bottom of the sealing top plate and the position of the upper sealing cavity are provided with an upper follow-up mechanism which is matched with the side follow-up mechanism and pushes the side follow-up mechanism to move. However, the detection jig with such a structure has the following problems: the driving device for driving the carrier to move comprises a motor fixing plate and a lead screw fixing seat which are arranged at the bottom of a bottom plate, a driving motor arranged on the motor fixing plate, a driving wheel arranged on a main shaft of the driving motor, a lead screw arranged on the lead screw fixing seat and a driven wheel arranged at the end part of the lead screw, wherein the driving wheel and the driven wheel are connected through a belt; the driving device has the defects of complex structure, large occupied space and poor operation stability; and the device does not have the effect of buffering in the carrier motion process, especially when the velocity of motion is too fast, leads to the product to rock or skew in sealed die cavity easily, and then influences the accuracy of test effect, and the motor generates heat moreover and can compensate air leakage pressure drop, seriously influences the reliability of leakproofness test.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide an air tightness testing device which has the characteristics of compact structure, reasonable layout, convenient assembly and disassembly, good reliability and capability of adapting to other products by replacing an upper clamp and a lower clamp; furthermore, the method has the characteristics of good stability, good test accuracy and high test efficiency.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

the air tightness testing device comprises a rack, wherein a horizontal workbench is arranged on the rack, the length direction of the workbench is the X-axis direction, the width direction of the workbench is the Y-axis direction, and the height direction of the workbench is the Z-axis direction; the method is characterized in that: the workbench is provided with at least one group of air tightness testing mechanism, and the air tightness testing mechanism comprises an installation plate fixedly installed on the workbench, a Y-axis sliding mechanism, a Z-axis lifting mechanism and a sealing clamp;

the Y-axis sliding mechanism comprises a guide rail, a sliding seat and a rodless cylinder, the guide rail is fixedly arranged on the mounting plate along the Y-axis direction, and a sliding block in sliding fit with the guide rail is arranged on the bottom surface of the sliding seat; the rodless cylinder is fixedly arranged on the mounting plate along the Y-axis direction and is positioned on one side of the guide rail; an outer sliding block of the rodless cylinder is fixedly connected with one end of the sliding seat;

the Z-axis lifting mechanism comprises a lower pressing plate arranged above the guide rail and a Z-axis driving device for driving the lower pressing plate to move along the Z-axis direction;

the sealing clamp comprises an upper clamp and a lower clamp, an upper cavity is arranged on the upper clamp, a lower cavity is arranged on the lower clamp, the upper cavity and the lower cavity are opposite and matched to form a testing cavity, and an air inlet communicated with the testing cavity is arranged on the upper clamp or the lower clamp; the upper clamp is fixedly connected with the lower pressing plate in a detachable connection mode, and the lower clamp is fixedly connected with the sliding seat in a detachable connection mode;

the rodless cylinder drives the sliding seat and the lower clamp to slide on the guide rail along the Y-axis direction, and when the lower clamp moves to the position right below the upper clamp, the Z-axis driving device drives the lower pressing plate and the upper clamp to descend or ascend in the Z-axis direction, so that the upper clamp and the upper clamp are matched or opened.

In an alternative embodiment, the guide rails include two guide rails arranged in parallel along the Y-axis direction; correspondingly, the number of the sliding blocks is two, and each sliding block is in sliding fit with one guide rail; a stop block extends downwards from the bottom of the sliding seat; two buffering devices for providing damping in the Y-axis direction are further arranged between the two guide rails on the mounting plate, and a position sensor is arranged on one side of each buffering device on the mounting plate; the stop block is positioned between the two buffer devices and is positioned on the same Y-axis with the two buffer devices; the stop block can be respectively abutted against the two buffer devices under the driving of the rodless cylinder.

In an optional embodiment, the rack comprises an upper cabinet body and a lower cabinet body; the workbench is arranged at the top of the lower cabinet body and is used as a top plate of the lower cabinet body;

the lower cabinet body is divided into a first lower mounting chamber, a second lower mounting chamber and a third lower mounting chamber from left to right, an electric box is mounted in the first lower mounting chamber, a tester is mounted in the second lower mounting chamber, and a pneumatic assembly is mounted in the third lower mounting chamber;

the upper cabinet body is divided into a first upper cabinet body and a second upper cabinet body from front to back, and the height of the second upper cabinet body is greater than that of the first upper cabinet body; the first upper cabinet body comprises a rectangular first upper frame, a first upper left sealing plate arranged on the left side surface of the first upper frame, a first upper right sealing plate arranged on the right side surface of the first upper frame, and a first upper top sealing plate arranged on the top surface of the first upper frame; the second upper cabinet body comprises a rectangular second upper frame, a second upper left sealing plate arranged on the left side surface of the second upper frame, a second upper right sealing plate arranged on the right side surface of the second upper frame, a second upper top sealing plate arranged on the top surface of the second upper frame, and a second upper back sealing plate arranged on the back surface of the second upper frame; the part of the front surface of the second upper frame, which is higher than the first upper frame, is provided with an all-in-one machine fixing plate;

the number of the air tightness testing mechanisms is two, and the air tightness testing mechanisms are arranged on the workbench side by side; the Z-axis lifting mechanism is positioned in the second upper cabinet body;

the all-in-one machine is installed on the all-in-one machine fixing plate, and a keyboard and a mouse which are electrically connected with the all-in-one machine are installed on the first upper top sealing plate.

In an optional implementation mode, the upper clamp or the lower clamp is provided with a partial pressure air hole communicated with the test cavity, the third lower mounting chamber is also internally provided with two partial pressure tanks, and each partial pressure tank is communicated with the partial pressure air hole of a group of air tightness test mechanisms through an air path assembly.

In an optional implementation mode, a scanning gun is installed in the first upper cabinet body corresponding to each group of air tightness testing mechanisms.

In an optional implementation manner, a grating sensor is mounted at the front end of the workbench corresponding to each group of air tightness testing mechanisms.

In an alternative embodiment, the Z-axis driving device comprises a cylinder fixing plate mounted above the mounting plate through a support column, and a down-pressing cylinder mounted on the cylinder fixing plate; the lower pressing plate is arranged at the lower end of a piston rod of the lower pressing cylinder, and a lower pressing guide mechanism is arranged between the lower pressing plate and the cylinder fixing plate; the downward pressing guide mechanism comprises two guide pillars respectively arranged on the lower pressing plate and two guide sleeves respectively arranged on the cylinder fixing plate and matched with the guide pillars, the guide pillars penetrate through the guide sleeves, and the upper ends of the guide pillars are higher than the upper surface of the cylinder fixing plate.

In an optional embodiment, a sealing ring is arranged between the upper clamp and the lower clamp, and the sealing ring is positioned on the outer peripheral side of the test cavity; the lower clamp is provided with a positioning hole, the bottom of the upper clamp is provided with a positioning column matched with the positioning hole, and the positioning column can be inserted into or separated from the positioning hole in the descending or ascending process.

In an optional implementation manner, the sealing fixture further includes a plugging portion disposed in the testing chamber and used for plugging the air holes on the tested product, and a driving mechanism mounted on the lower fixture and used for driving the plugging portion to act.

In an optional embodiment, the blocking part comprises a soft rubber profiling block, and the soft rubber profiling block is provided with a profiling binding surface matched with the air holes of the tested product; the driving mechanism comprises a sliding block connected with the plugging part and a cylinder assembly which is in transmission connection with the sliding block and is used for driving the sliding block to act; and the lower clamp is provided with a sliding groove communicated with the test cavity, and the sliding block is in sliding fit with the sliding groove.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the workbench of the utility model is provided with at least one group of air tightness testing mechanism, and the air tightness testing mechanism comprises a mounting plate fixedly mounted on the workbench, a Y-axis sliding mechanism, a Z-axis lifting mechanism and a sealing clamp; the rodless cylinder drives the sliding seat and the lower clamp to slide on the guide rail along the Y-axis direction, and when the lower clamp moves to the position right below the upper clamp, the Z-axis driving device drives the lower pressing plate and the upper clamp to descend or ascend in the Z-axis direction, so that the upper clamp and the upper clamp are matched or opened; in addition, the upper clamp is fixedly connected with the lower pressing plate in a detachable connection mode, and the lower clamp is fixedly connected with the sliding seat in a detachable connection mode.

2. The guide rail of the utility model comprises two guide rails which are arranged in parallel along the Y-axis direction; correspondingly, the number of the sliding blocks is two, and each sliding block is in sliding fit with one guide rail; the bottom of the sliding seat extends downwards to form a stop block; two buffering devices for providing damping in the Y-axis direction are further arranged on the mounting plate between the two guide rails, and a position sensor is arranged on one side of each buffering device on the mounting plate; the stop block is positioned between the two buffer devices and is positioned on the same Y-axis with the two buffer devices; the dog can be inconsistent with two buffer respectively under the drive of rodless cylinder. In addition, the rodless cylinder, the guide rail, the buffer device and the position sensor are mutually matched, so that the test accuracy can be further improved, and the layout is more reasonable; the design of double guide rails can form plane type stress, the upper clamp and the lower clamp are uniformly pressed, and the work of the clamps is stable. Especially, when more than two groups of air tightness testing mechanisms are adopted, the testing efficiency can be greatly improved.

3. The frame of the utility model comprises an upper cabinet body and a lower cabinet body; the workbench is arranged at the top of the lower cabinet body and is used as a top plate of the lower cabinet body; the lower cabinet body is divided into a first lower mounting chamber, a second lower mounting chamber and a third lower mounting chamber from left to right, an electric box is mounted in the first lower mounting chamber, a tester is mounted in the second lower mounting chamber, and a pneumatic assembly is mounted in the third lower mounting chamber; in addition, the upper cabinet body is divided into a first upper cabinet body and a second upper cabinet body from front to back, and the height of the second upper cabinet body is greater than that of the first upper cabinet body; the Z-axis lifting mechanism is positioned in the second upper cabinet body; the integrated machine fixing plate is provided with an industrial control integrated machine, and the first upper top sealing plate is provided with a keyboard and a mouse which are respectively and electrically connected with the industrial control integrated machine; design like this, can accomodate various equipment that do not need frequent operation respectively in different enclosure spaces, convenient debugging is maintained, places industrial control all-in-one, keyboard and mouse in conveniently watching and the position of convenient operation, has rationally distributed, convenient operation, the guard effect is good and the outward appearance is pleasing to the eye advantage.

4. The utility model discloses a first internal every group gas tightness accredited testing organization that corresponds of going up cabinet all installs a scanning rifle, when lower anchor clamps remove to the lower side of supreme anchor clamps, scanning rifle scans and decodes and contrasts the data in signal and the database and generate the code reading signal to the product of being surveyed, the display device of code reading signal to industry control integration machine is shown on receiving and transmitting to the wireless communication unit, can be according to the model of reading code information discernment product, information such as specification, the staff's quick adjustment test parameter of being convenient for, and the work efficiency is improved. In addition, a grating sensor is installed at the front end of each air tightness testing mechanism on the workbench, the operation area of workers is detected in real time through the grating sensor, when foreign objects enter the operation area, the grating sensor sends detection signals to the industrial control integrated machine, and the industrial control integrated machine controls the alarm device to realize alarm, so that the safety performance is improved.

5. The utility model discloses a be equipped with the locating hole on the lower fixture, the bottom of going up anchor clamps is equipped with locating hole assorted reference column, and the reference column has accurate and easy dismounting's advantage in descending or the in-process that rises can insert or break away from the locating hole. Additionally, the utility model discloses be provided with the shutoff portion that is used for the shutoff to be surveyed the bleeder vent of product in the test intracavity, carry out automatic shutoff to the bleeder vent of being surveyed the product through actuating mechanism drive shutoff portion, the shutoff accuracy in place, difficult pine takes off, and the leakproofness is good, can not lead to the misdetection, is favorable to improving efficiency of software testing.

6. The utility model discloses a mounting panel to and install the cylinder fixed plate in the mounting panel top through four support columns, design like this, can resist the even sealed reliability of whole gas tightness accredited testing organization atress of shutoff power protection with reasonable deformation.

Drawings

FIG. 1 is a perspective view of an airtightness testing apparatus according to an embodiment;

FIG. 2 is a perspective view of another angle of the airtightness testing apparatus according to the embodiment;

FIG. 3 is a perspective view of two sets of airtightness testing mechanisms according to the embodiment;

fig. 4 is a perspective view of the sealing jig of embodiment 1;

FIG. 5 is a schematic view of the structure of a lower jig of embodiment 1;

FIG. 6 is a schematic structural view of an upper jig of embodiment 1;

fig. 7 is a schematic view of a split structure of the sealing jig of embodiment 2;

FIG. 8 is a schematic view of the structure of a lower jig of embodiment 2;

FIG. 9 is a schematic structural view of a plugging portion, a slider, and a cylinder assembly according to embodiment 2;

fig. 10 is a schematic structural view of an upper jig of embodiment 2.

In the figure: 11. an upper cabinet body; 1111. a first upper frame; 1112. a first upper left closure plate; 1113. a first upper right sealing plate; 1114. a first upper top closure plate; 1121. a second upper frame; 1122. a second upper left closure plate; 1123. a second upper right sealing plate; 1124. a second upper top closure plate; 1125. a second upper back seal plate; 1126. fixing the all-in-one machine; 12. a lower cabinet body; 121. a first lower mounting chamber; 122. a second lower mounting chamber; 123. a third lower mounting chamber; 20. a work table; 31. mounting a plate; 32. a Y-axis slide mechanism; 321. a guide rail; 322. a sliding seat; 323. a rodless cylinder; 33. a Z-axis lifting mechanism; 331. a lower pressing plate; 332. a support pillar; 333. a cylinder fixing plate; 334. pressing down the air cylinder; 335. a guide post; 336. a guide sleeve; 34. sealing the clamp; 341. an upper clamp; 3411. an upper cavity; 3412. a positioning column; 342. a lower clamp; 3421. a lower cavity; 3422. an air inlet; 3423. positioning holes; 343. a plugging section; 344. a slider; 345. a cylinder assembly; 41. a buffer device; 42. a position sensor; 51. an electric box; 52. a tester; 61. an industrial control all-in-one machine; 62. a keyboard; 63. a mouse; 71. a scanning gun; 72. a grating sensor; 80. a partial pressure tank.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.

In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1:

referring to fig. 1-6, the air tightness testing device includes a frame, a horizontal worktable 20 is disposed on the frame, the length direction of the worktable 20 is the X-axis direction, the width direction of the worktable is the Y-axis direction, and the height direction of the worktable is the Z-axis direction;

the worktable 20 is provided with two groups of air tightness testing mechanisms, and each air tightness testing mechanism comprises an installation plate 31, a Y-axis sliding mechanism 32, a Z-axis lifting mechanism 33 and a sealing clamp 34 which are fixedly installed on the worktable;

the Y-axis sliding mechanism 32 comprises a guide rail 321, a sliding seat 322 and a rodless cylinder 323, the guide rail is fixedly arranged on the mounting plate along the Y-axis direction, and a sliding block in sliding fit with the guide rail is arranged on the bottom surface of the sliding seat 322; the rodless cylinder is fixedly arranged on the mounting plate along the Y-axis direction and is positioned on one side of the guide rail; an outer sliding block of the rodless cylinder is fixedly connected with one end of the sliding seat;

the Z-axis lifting mechanism 33 includes a lower platen 331 disposed above the guide rail and a Z-axis driving device for driving the lower platen to move in the Z-axis direction;

the sealing clamp 34 comprises an upper clamp 341 and a lower clamp 342, the upper clamp 341 is provided with an upper cavity 3411, the lower clamp 342 is provided with a lower cavity 3421, the upper cavity and the lower cavity are opposite and matched to form a testing cavity, and the lower clamp 342 is provided with an air inlet 3422 communicated with the testing cavity; the upper clamp is fixedly connected with the lower pressing plate in a detachable connection mode, and the lower clamp is fixedly connected with the sliding seat in a detachable connection mode; in particular, the detachable connection may be a screw connection or a snap connection. Preferably, the lower clamp can be fixedly connected with the sliding seat through a transition plate.

The utility model discloses in, rodless cylinder indicates to utilize the piston direct or indirect mode to connect external actuating mechanism to make it follow the cylinder that the piston realized reciprocating motion. The cylinder has the greatest advantage of saving installation space, and particularly, the rodless cylinder is a magnetic coupling rodless cylinder or a mechanical rodless cylinder.

In a preferred embodiment of the present invention, the guide rails include two guide rails disposed in parallel along the Y-axis direction; correspondingly, the number of the sliding blocks is two, and each sliding block is in sliding fit with one guide rail; a stop block extends downwards from the bottom of the sliding seat 322; two buffering devices 41 for providing damping in the Y-axis direction are further arranged on the mounting plate between the two guide rails, and a position sensor 42 is arranged on one side of each buffering device on the mounting plate; the stop block is positioned between the two buffer devices and is positioned on the same Y-axis with the two buffer devices; the dog can be inconsistent with two buffer respectively under the drive of rodless cylinder. In addition, the rodless cylinder, the guide rail, the buffer device and the position sensor are mutually matched, so that the test accuracy can be further improved, and the layout is more reasonable; especially, when more than two groups of air tightness testing mechanisms are adopted, the testing efficiency can be greatly improved. Specifically, the damping device includes a fixing base and a damper installed on the fixing base, and the damper may be a hydraulic damper.

In the preferred embodiment of the present invention, the frame comprises an upper cabinet 11 and a lower cabinet 12; the workbench is arranged at the top of the lower cabinet body and is used as a top plate of the lower cabinet body;

the lower cabinet body 12 is divided into a first lower mounting chamber 121, a second lower mounting chamber 122 and a third lower mounting chamber 123 from left to right, the electric box 51 is mounted in the first lower mounting chamber, the tester 52 is mounted in the second lower mounting chamber, and the pneumatic assembly is mounted in the third lower mounting chamber; specifically, the pneumatic assembly comprises an inflation valve, a pressure retaining valve and an air release valve which are connected through pipelines; an air source interface of the tester is connected with an inflation valve, and an air outlet end of the inflation valve is respectively connected with a pressure retaining valve and an air release valve; the pressure retaining valve is connected with an air inlet of the sealing mould; more preferably, the air inlet of the inflation valve is connected with the air source interface of the tester through a high-pressure regulating valve and a low-pressure regulating valve respectively.

The upper cabinet body 11 is divided into a first upper cabinet body and a second upper cabinet body from front to back, and the height of the second upper cabinet body is greater than that of the first upper cabinet body; the first upper cabinet body comprises a rectangular first upper frame 1111, a first upper left sealing plate 1112 arranged on the left side surface of the first upper frame, a first upper right sealing plate 1113 arranged on the right side surface of the first upper frame, and a first upper top sealing plate 1114 arranged on the top surface of the first upper frame; the second upper cabinet includes a rectangular second upper frame 1121, a second upper left sealing plate 1122 provided on the left side surface of the second upper frame 1121, a second upper right sealing plate 1123 provided on the right side surface of the second upper frame, a second upper top sealing plate 1124 provided on the top surface of the second upper frame, and a second upper back sealing plate 1125 provided on the back surface of the second upper frame; an all-in-one machine fixing plate 1126 is arranged on the part of the front surface of the second upper frame, which is higher than the first upper frame;

an industrial control integrated machine 61 is mounted on the integrated machine fixing plate 1126, and a keyboard 62 and a mouse 63 which are respectively electrically connected with the industrial control integrated machine are mounted on the first upper top sealing plate.

The frame adopts above-mentioned design, can accomodate various equipment that need not frequently to operate respectively in different enclosure spaces, and convenient debugging is maintained, places industrial control all-in-one, keyboard and mouse in conveniently watching and the position of convenient operation, has rationally distributed, convenient operation, the guard effect is good and the outward appearance is pleasing to the eye advantage.

In the preferred embodiment of the present invention, a scanning gun 71 is installed in the first upper cabinet corresponding to each set of air tightness testing mechanism; a grating sensor 72 is mounted on the front end of the workbench corresponding to each air tightness testing mechanism.

In the preferred embodiment of the present invention, the Z-axis driving device comprises a cylinder fixing plate 333 mounted above the mounting plate via four supporting columns 332, and a down-pressing cylinder 334 mounted on the cylinder fixing plate; the lower pressing plate is arranged at the lower end of a piston rod of the lower pressing cylinder, and a lower pressing guide mechanism is arranged between the lower pressing plate and the cylinder fixing plate; the downward-pressing guide mechanism comprises two guide pillars 335 arranged on the lower pressing plate and two guide sleeves 336 arranged on the cylinder fixing plate and matched with the guide pillars, the guide pillars penetrate through the guide sleeves, and the upper ends of the guide pillars are higher than the upper surface of the cylinder fixing plate. The down-pressing cylinder adopts a large-stroke cylinder, so that the positioning is more accurate, and the down-pressing plate can be conveniently lifted or lowered. Preferably, a limiting part and a buffer are further installed between the guide sleeve and the cylinder fixing plate, and the buffer can reduce noise generated by movement of the upper clamp and play a role in pressing and buffering. The limiting piece can control the descending position of the lower pressing plate.

In the preferred embodiment of the present invention, a sealing ring is disposed between the upper clamp and the lower clamp, and the sealing ring is located on the outer peripheral side of the testing cavity; specifically, set up the sealing washer mounting groove on last anchor clamps, the sealing washer inlays to be located in the sealing washer mounting groove. After the upper clamp and the lower clamp are matched and connected, the tightness between the upper clamp and the lower clamp can be ensured, the tightness of the test cavity is ensured, and the test accuracy of a tested product is improved.

In the preferred embodiment of the present invention, the lower clamp 342 has a positioning hole 3423, the bottom of the upper clamp 341 has a positioning post 3412 matching with the positioning hole, and the positioning post can be inserted into or separated from the positioning hole during descending or ascending, which has the advantages of accurate positioning and easy assembly and disassembly.

In this embodiment, an air tightness test is performed with the upper case or the bottom case of the smart watch as a product to be tested, and the specific test method is as follows:

a test method of a gas tightness test device comprises the following steps:

a preparation step; the rodless cylinder is controlled to drive the sliding seat and the lower clamp to slide on the guide rail along the Y-axis direction, a tested product is placed into a lower cavity of the lower clamp after the lower clamp moves to an assembly station, then the rodless cylinder is continuously controlled to drive the sliding seat and the lower clamp to slide on the guide rail along the Y-axis direction, and when the lower clamp moves to the position right below the upper clamp, the Z-axis driving device is controlled to drive the lower pressing plate and the upper clamp to descend in the Z-axis direction, so that the upper clamp and the upper clamp are matched; communicating the tester with an air inlet of the sealing clamp;

and (3) testing: filling compressed air with preset pressure into the test cavity by the tester, detecting a pressure change value in the test cavity by the tester after preset pressure maintaining time, and judging that the tested product is an air-tightness unqualified product if the pressure change value exceeds a specified range; and if the pressure change value is within the specified range, judging that the tested product is an air-tightness qualified product.

In the preferred embodiment of the present invention, in the preparation step, when the lower clamp moves to a position right below the upper clamp, the scanning gun scans and decodes the product to be tested and compares the signal with the data in the database to generate a code reading signal, and the wireless communication unit receives and transmits the code reading signal to the display device of the industrial control integrated machine for display; in the testing process, when a foreign object enters the operating area, the grating sensor sends a detection signal to the industrial control integrated machine, and the industrial control integrated machine controls the alarm device to realize alarm.

Example 2

Referring to fig. 7-10, the present embodiment is characterized in that: the sealing clamp further comprises a plugging part 343 which is arranged in the test cavity and used for plugging the air holes on the tested product, and a driving mechanism which is arranged on the lower clamp and used for driving the plugging part to act; the blocking part 343 comprises a soft rubber profiling block, and the soft rubber profiling block is provided with a profiling binding surface matched with the air vent of the tested product; the driving mechanism comprises a slide block 344 connected with the blocking part and a cylinder assembly 345 which is in transmission connection with the slide block and is used for driving the slide block to move; the lower clamp is provided with a sliding groove communicated with the test cavity, and the sliding block is in sliding fit with the sliding groove.

The utility model discloses be provided with the shutoff portion that is used for the shutoff to be surveyed the bleeder vent of product in the test intracavity, carry out automatic shutoff to the bleeder vent of being surveyed the product through actuating mechanism drive shutoff portion, the shutoff is accurate in place, and difficult pine takes off, and the leakproofness is good, can not lead to the misdetection, is favorable to improving efficiency of software testing. The soft gel-like block may be made of silicon gel, rubber or other flexible materials, which is not limited in this embodiment.

The rest is the same as in example 1.

Example 3:

referring to fig. 1, the present embodiment is characterized in that: the upper clamp or the lower clamp is provided with a partial pressure air hole communicated with the test cavity, the third lower mounting chamber is also internally provided with two partial pressure tanks 80, and each partial pressure tank is communicated with the partial pressure air hole of a group of air tightness test mechanisms through an air path assembly. Specifically, the gas circuit subassembly includes the partial pressure valve, and the one end and the partial pressure gas pocket intercommunication of partial pressure valve, its other end and partial pressure jar intercommunication.

In this embodiment, the smart watch finished product is used as a tested product to perform the air tightness test, and the specific test method is as follows:

a test method of a gas tightness test device comprises the following steps:

small leakage test link: filling compressed air with preset pressure into the test cavity by the tester, detecting a pressure change value in the test cavity by the tester after preset pressure maintaining time, and if the pressure change value exceeds a specified range, judging that the tested product is a small-leakage unqualified product and entering an exhaust link; if the pressure change value is in the specified range, judging that the tested product is a qualified product with small leakage, and entering a large leakage testing link;

a large leakage testing link: opening a pressure dividing valve, enabling gas in the test cavity to enter a pressure dividing tank, detecting a pressure change value in the pressure dividing tank by a tester after a preset balance time, and judging that the tested product is a large-leakage unqualified product if the pressure change value exceeds a specified range; and if the pressure change value is within the specified range, judging that the detected product is a large-leakage qualified product.

The rest is the same as in example 1.

Other examples are as follows:

the number of the air tightness testing mechanisms can be 1 group, 3 groups, 4 groups or more, and the air tightness testing mechanisms can be adjusted according to actual needs. The tester adopts a product in the prior art, specifically can be a tester with the model number of CD300 produced by Guangzhou Appton Automation systems, which is used for testing a finished intelligent watch; the tester with the model number of UT811S, manufactured by Appton Automation systems, Inc. of Guangzhou, is used for testing semi-finished products of the smart watch, such as an upper shell and a bottom shell. While only certain features and embodiments of the application have been illustrated and described, many modifications and changes may occur to those skilled in the art (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the scope and spirit of the invention in the claims.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The air tightness testing device comprises a rack, wherein a horizontal workbench is arranged on the rack, the length direction of the workbench is the X-axis direction, the width direction of the workbench is the Y-axis direction, and the height direction of the workbench is the Z-axis direction; the method is characterized in that: the workbench is provided with at least one group of air tightness testing mechanism, and the air tightness testing mechanism comprises an installation plate fixedly installed on the workbench, a Y-axis sliding mechanism, a Z-axis lifting mechanism and a sealing clamp;

2. The airtightness testing apparatus according to claim 1, wherein: the guide rails comprise two guide rails which are arranged in parallel along the Y-axis direction; correspondingly, the number of the sliding blocks is two, and each sliding block is in sliding fit with one guide rail; a stop block extends downwards from the bottom of the sliding seat; two buffering devices for providing damping in the Y-axis direction are further arranged between the two guide rails on the mounting plate, and a position sensor is arranged on one side of each buffering device on the mounting plate; the stop block is positioned between the two buffer devices and is positioned on the same Y-axis with the two buffer devices; the stop block can be respectively abutted against the two buffer devices under the driving of the rodless cylinder.

3. The airtightness testing apparatus according to claim 1, wherein: the rack comprises an upper cabinet body and a lower cabinet body; the workbench is arranged at the top of the lower cabinet body and is used as a top plate of the lower cabinet body;

4. The airtightness testing apparatus according to claim 3, wherein: the upper clamp or the lower clamp is provided with a partial pressure air hole communicated with the test cavity, the third lower mounting chamber is also internally provided with two partial pressure tanks, and each partial pressure tank is communicated with the partial pressure air hole of a group of air tightness test mechanisms through an air path assembly.

5. The airtightness testing apparatus according to claim 3, wherein: a scanning gun is installed corresponding to each group of air tightness testing mechanisms in the first upper cabinet body.

6. The airtightness testing apparatus according to claim 3, wherein: and a grating sensor is arranged at the front end of the workbench corresponding to each group of air tightness testing mechanisms.

7. The airtightness testing apparatus according to claim 1, wherein: the Z-axis driving device comprises a cylinder fixing plate and a lower pressing cylinder, wherein the cylinder fixing plate is arranged above the mounting plate through a support column; the lower pressing plate is arranged at the lower end of a piston rod of the lower pressing cylinder, and a lower pressing guide mechanism is arranged between the lower pressing plate and the cylinder fixing plate; the downward pressing guide mechanism comprises two guide pillars respectively arranged on the lower pressing plate and two guide sleeves respectively arranged on the cylinder fixing plate and matched with the guide pillars, the guide pillars penetrate through the guide sleeves, and the upper ends of the guide pillars are higher than the upper surface of the cylinder fixing plate.

8. The airtightness testing apparatus according to claim 1, wherein: a sealing ring is arranged between the upper clamp and the lower clamp and is positioned on the outer peripheral side of the test cavity; the lower clamp is provided with a positioning hole, the bottom of the upper clamp is provided with a positioning column matched with the positioning hole, and the positioning column can be inserted into or separated from the positioning hole in the descending or ascending process.

9. The airtightness testing apparatus according to claim 8, wherein: the sealing clamp further comprises a plugging part which is arranged in the test cavity and used for plugging the air holes in the tested product, and a driving mechanism which is arranged on the lower clamp and used for driving the plugging part to act.

10. The airtightness testing apparatus according to claim 9, wherein: the plugging part comprises a soft rubber profiling block, and the soft rubber profiling block is provided with a profiling binding surface matched with the air vent of the tested product; the driving mechanism comprises a sliding block connected with the plugging part and a cylinder assembly which is in transmission connection with the sliding block and is used for driving the sliding block to act; and the lower clamp is provided with a sliding groove communicated with the test cavity, and the sliding block is in sliding fit with the sliding groove.