CN217842941U - Centering and holding mechanism and air tightness testing equipment - Google Patents

Abstract

The application relates to the technical field of air tightness testing equipment, in particular to a centering and fixing mechanism and air tightness testing equipment. The centering and fixing mechanism comprises a mounting seat, a first mobile platform, a second mobile platform, a hinge mechanism and an air outlet pipe. The first mobile station is slidably coupled to the mount, and the first mobile station is movable in a first direction relative to the mount. The second mobile station is slidably connected to the first mobile station, and the second mobile station is capable of moving in a second direction relative to the mounting base, wherein the first direction and the second direction intersect. The hinge mechanism is connected with the second mobile platform, the air outlet pipe is rotatably connected with the second mobile platform through the hinge mechanism and is used for connecting the air conveying pipe of the air tightness testing equipment, and the air outlet pipe is intersected with the axis of the air outlet pipe based on at least one rotating axis of the hinge mechanism relative to the second mobile platform. The centering and fixing mechanism is convenient to center and can improve the accuracy of the test when being used in air tightness test equipment.

Description

Centering and fixing mechanism and air tightness testing equipment

Technical Field

The application relates to the technical field of air tightness testing equipment, in particular to a centering and fixing mechanism and air tightness testing equipment.

Background

Liner products or container products, such as electric water heaters and chemical containers, generally have high requirements on sealing performance. When the product is manufactured, in order to ensure the product quality, the product needs to be inflated for air tightness test.

Liner type or container type products are generally assembly line work, the incoming material positions of the products are different, and in the testing process, an air outlet piece of a testing machine is difficult to align with an air inlet of the products, so that air leakage is caused in the air inflation process of the products during testing, and the testing effect is influenced.

SUMMERY OF THE UTILITY MODEL

The application provides a centering and holding mechanism, and the application also provides air tightness testing equipment with the centering and holding mechanism.

In a first aspect, the application provides a centering and holding mechanism, which is applied to air tightness testing equipment and comprises a mounting seat, a first mobile platform, a second mobile platform, a hinge mechanism and an air outlet pipe. The first mobile station is slidably coupled to the mount, and the first mobile station is movable in a first direction relative to the mount. The second mobile station is slidably connected to the first mobile station, and the second mobile station is capable of moving in a second direction relative to the mounting base, wherein the first direction and the second direction intersect. The hinge mechanism is connected with the second mobile platform, the air outlet pipe is rotatably connected with the second mobile platform through the hinge mechanism and is used for connecting the air conveying pipe of the air tightness testing equipment, and the air outlet pipe is intersected with the axis of the air outlet pipe based on at least one rotating axis of the hinge mechanism relative to the second mobile platform.

In some alternative examples, the hinge mechanism includes a spherical bearing coupled to the second mobile station, and the outlet duct is disposed through the spherical bearing.

In some optional examples, the outlet duct includes body and spacing portion, and the body wears to locate spherical bearing, and spacing portion connects in the body periphery and for the periphery wall protrusion of body, spacing portion support in spherical bearing's terminal surface.

In some optional examples, the hinge mechanism includes a first hinge and a second hinge, the second hinge is connected to the second mobile station through the first hinge, and the second hinge is capable of rotating around a first rotation axis relative to the second mobile station based on the first hinge; the air outlet pipe is connected to the first hinge through a second hinge, the air outlet pipe can rotate around a second rotating shaft relative to the first hinge based on the second hinge, the second rotating shaft is intersected with the first rotating shaft, and at least one of the second rotating shaft and the first rotating shaft is intersected with the axis of the air outlet pipe; or the hinge mechanism comprises a spherical hinge, and the air outlet pipe is connected to the second mobile station through the spherical hinge.

In some optional examples, the mounting base is provided with a first sliding groove, the first sliding groove extends along a first direction, the first mobile station includes a first sliding base and a first sliding rail, the first sliding rail is slidably embedded in the first sliding groove, the first sliding base is connected to the first sliding rail, and the second mobile station is connected to the first sliding base.

In some optional examples, the first mobile station further includes a first guide member connected to the first sliding seat and extending along the first direction, and the first guide member is slidably disposed through the mounting seat.

In some optional examples, the second mobile station includes a second sliding seat and a second sliding rail, the second sliding rail slidably penetrates through the first mobile station along the second direction, the second sliding seat is connected to the second sliding rail, and the air outlet pipe is connected to the second sliding seat.

In some optional examples, the second mobile station further includes a second guiding member, the second guiding member is connected to the second sliding seat and extends along the second direction, and the second guiding member is slidably disposed through the first mobile station.

In a second aspect, the present application further provides an air tightness testing apparatus, which includes an air supply pipe and the centering and holding mechanism, wherein the air supply pipe is connected to the air outlet pipe and communicated with the air outlet pipe.

Compared with the prior art, when the centering and holding mechanism provided by the application is applied to the air tightness testing equipment, the position of the air outlet pipe relative to the container to be tested in the first direction is adjusted by moving the first moving platform, so that the air outlet pipe is close to the container to be tested. And then the second mobile platform is moved to adjust the position of the air outlet pipe relative to the container to be measured in the second direction so as to align the air outlet pipe with the air inlet of the container to be measured. The outlet duct is based on articulated mechanism and is crossing for the axis of second mobile station pivoted at least one rotation axis and outlet duct, and the outlet duct rotates for the second mobile station promptly and can change the angle of outlet duct for the second mobile station, and the alignment of the inlet of outlet duct and the container that awaits measuring of being convenient for has improved efficiency of software testing. The centering and fixing mechanism can realize the random movement of the air outlet pipe in the first direction and the second direction on the plane, is convenient to center, and is used for accurately aligning the air outlet pipe with the air inlet of a container to be tested when the air tightness testing equipment is used, so that the testing reliability and the accuracy of a testing result are greatly improved.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a simplified structural schematic diagram of a hermeticity testing apparatus according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of a container under test that may be inspected using the hermeticity testing apparatus shown in fig. 1.

Fig. 3 is a schematic perspective view of a centering and retaining mechanism according to an embodiment of the present application.

Fig. 4 is a schematic perspective sectional view of a part of the centering and holding mechanism shown in fig. 3.

Fig. 5 is a schematic cross-sectional view of the centering and retaining mechanism shown in fig. 3.

Fig. 6 is a schematic structural view of another embodiment of the hinge mechanism of the centering and retaining mechanism shown in fig. 3.

Fig. 7 is a schematic structural view of still another embodiment of the hinge mechanism of the centering and holding mechanism shown in fig. 3.

Description of reference numerals: 100. a centering and holding mechanism; 10. a mounting base; 11. a first connection portion; 12. a second connecting portion; 13. connecting the support columns; 14. a fitting portion; 141. a first chute; 30. a first mobile station; 32. a first sliding seat; 321. a first mounting plate; 323. a second chute; 34. a first slide rail; 36. a first guide member; 50. a second mobile station; 52. a second sliding seat; 521. a second mounting plate; 54. a second slide rail; 56. a second guide member; 70. an air outlet pipe; 71. inner chamfering; 72. a pipe body; 721. a first end; 723. a second end; 74. a limiting part; 90. a hinge mechanism; 92. a spherical bearing; 93. an installation table; 932. installing a cavity; 934. installing a channel; 94. a first hinge member; 96. a second hinge member; 98. spherical hinge; 200. air tightness testing equipment; 201. a main body; 203. a gas delivery pipe; 205. a work table; 206. an air pressure sensor; 207. an airflow sensor; 300. a container to be tested; 301. an air inlet; 3012. chamfering the outer part; x, a first direction; y, a second direction; o1, a first rotating shaft; o2 and a second rotating shaft.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present application and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

Throughout the description of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a removable connection, or an integral connection unless expressly stated or limited otherwise. Either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Referring to fig. 1 and fig. 2, an embodiment of the present disclosure provides a centering and holding mechanism 100, and the centering and holding mechanism 100 may be applied to a hermeticity testing apparatus 200.

The air tightness testing device 200 is used for testing the air tightness of inner containers or container products (such as the container 300 to be tested), the air tightness testing device 200 may include a main body 201, an air pipe 203 and the centering and holding mechanism 100, the centering and holding mechanism 100 is connected to the main body 201, and the air pipe 203 is connected to the centering and holding mechanism 100. The centering and holding mechanism 100 is used for holding the air pipe 203 and adjusting the position of the air pipe 203 relative to the container 300 to be tested so as to facilitate the air tightness test. One end of the air pipe 203 may be used to connect an external air supply device (e.g., an air pump) or an air supply device connected to the air tightness testing device 200, and the other end is connected to the centering and holding mechanism 100, and the specification does not limit the specific material of the air pipe 203, for example, the air pipe 203 may be a metal pipe or a hose, and in this embodiment, the air pipe 203 is a hose.

When the gas tightness testing device is used, the centering and holding mechanism 100 adjusts the gas outlet of the gas pipe 203 to align with the gas inlet of the container 300 to be tested, the gas feeding device of the external gas feeding equipment or the gas tightness testing equipment 200 transmits gas to the gas pipe 203, and the gas is transmitted into the container 300 to be tested through the gas pipe 203 so as to detect the gas tightness of the container 300 to be tested.

In some embodiments, the hermeticity testing apparatus 200 may further include a worktable 205, an air pressure sensor 206, an air flow sensor 207, and the like, wherein the worktable 205 is disposed at one side of the main body 201 and is used for mounting and placing the container 300 to be tested, and a holding structure 208, such as a jig, a fixture, and the like, for holding the container 300 to be tested may be disposed on the worktable 205. The air pressure sensor 206 and the air flow sensor 207 are connected to the air pipe 203, and are respectively used for reading parameters of air tightness detection such as pressure and flow of air in the container 300 to be tested during testing.

Referring to fig. 3, in the present embodiment, the centering and holding mechanism 100 includes a mounting base 10, a first movable stage 30, a second movable stage 50, and an air outlet pipe 70. The mount 10 is fixedly coupled to the main body 201, the first mobile station 30 is slidably coupled to the mount 10, the second mobile station 50 is slidably coupled to the first mobile station 30, and a sliding direction of the second mobile station 50 intersects with a sliding direction of the first mobile station 30. The air outlet pipe 70 is connected to the second mobile station 50, and the air outlet pipe 70 is connected to the air supply pipe 203 and communicates with the air supply pipe 203.

The gas pipe 203 is communicated with the gas outlet pipe 70, and the gas pipe 203 conveys the test gas into the container 300 to be tested through the gas outlet pipe 70. In use, the first movable stage 30 slides relative to the mounting base 10, the position of the air outlet pipe 70 relative to the container 300 to be measured in the sliding direction of the first movable stage 30 is adjusted, the second movable stage 50 slides relative to the mounting base 10, and the position of the air outlet pipe 70 relative to the container 300 to be measured in the sliding direction of the second movable stage 50 is adjusted. First mobile station 30 and second mobile station 50 can adjust the position of outlet duct 70 for the container 300 that awaits measuring for outlet duct 70 can accurately be aimed at with the container 300 that awaits measuring, guarantees the gas tightness preferred of gas transmission stage, thereby realizes comparatively accurate gas tightness test smoothly, improves efficiency of software testing.

The mount 10 includes a first connection portion 11, a second connection portion 12, a fitting portion 14, and a connection pillar 13, and the connection pillar 13 is connected between the first connection portion 11 and the second connection portion 12. The first connecting portion 11 is used for connecting the main body 201, for example, the first connecting portion 11 is fixedly connected to the main body 201 by a bolt. In some embodiments, the main body 201 may include a lifting mechanism, and the first connecting portion 11 may also be connected to a driving end of a lifting driving member of the lifting mechanism, so as to adjust the height of the centering and retaining mechanism 100, thereby adapting to different sizes of containers 300 to be tested. In this embodiment, the first connecting portion 11 is substantially disc-shaped, and the connecting strut 13 is connected to one side of the first connecting portion 11 and substantially perpendicular to the first connecting portion 11. The number of the connection pillars 13 is plural, and in the present embodiment, the number of the connection pillars 13 is four, and four connection pillars 13 are distributed at substantially equal intervals in the circumferential direction of the first connection portion 11. The second connecting portion 12 is connected to an end of the connecting strut 13 facing away from the first connecting portion 11. In the present embodiment, the second connecting portion 12 has a substantially square block shape. The engaging portion 14 is fixed to a side of the second connecting portion 12 facing away from the connecting strut 13, and is adapted to slidably engage with the first movable stage 30.

The first mobile station 30 includes a first slide rail 34 and a first sliding seat 32, the first slide rail 34 is slidably engaged with the engaging portion 14, and the first sliding seat 32 is fixed to the first slide rail 34. Further, the matching portion 14 is provided with a first sliding slot 141, the first sliding slot 141 penetrates through the matching portion 14 along the first direction X, and the first sliding rail 34 penetrates through the first sliding slot 141 and is in sliding fit with the first sliding slot 141. The first sliding seat 32 is connected to a side of the first sliding rail 34 away from the matching portion 14. The specific direction of the first direction X is not limited in the present specification, for example, the first direction X may be a longitudinal direction of the first sliding seat 32, or may also be a width direction of the first sliding seat 32, and in the present embodiment, the first direction X is a longitudinal direction of the first sliding seat 32. The first sliding seat 32 can slide along the first direction X relative to the mounting seat 10, and in some embodiments, the first moving stage 30 can further include a movable driving member, which can be a driving source such as an air cylinder, a hydraulic cylinder, or a linear motor, and the first sliding seat 32 can be connected to an output end of the movable driving member and can slide along the first direction X under the driving of the movable driving member, so as to adjust the position of the outlet pipe 70 in the first direction X.

In the present embodiment, the first moving stage 30 further includes a first guiding element 36, and the first guiding element 36 is used for providing guidance for the sliding of the first sliding seat 32, so that the relative movement between the first sliding rail 34 and the mating portion 14 is smoother. The first guide 36 is substantially in the shape of a round bar, and the first guide 36 is slidably disposed through the second connecting portion 12 along the first direction X. In order to facilitate the installation of the first guide 36, the first mobile station 30 may further include two first mounting plates 321, and the two first mounting plates 321 are respectively disposed at two ends of the first sliding seat 32 and located at two sides of the second connecting portion 12. Both ends of the first guide 36 are fixedly connected to the two first mounting plates 321, respectively. The number of the first guides 36 is two, two first guides 36 are substantially parallel to each other, and the two first guides 36 are arranged in parallel at an interval in the second direction Y. The second direction Y intersects (e.g., is perpendicular to) the first direction X, and in this embodiment, the second direction Y is a width direction of the first sliding seat 32.

Referring to fig. 3 and fig. 4, the second moving stage 50 is connected to a side of the first sliding seat 32 away from the first sliding rail 34, and the second moving stage 50 is used for adjusting the position of the air outlet pipe 70 in the second direction Y. The second mobile station 50 includes a second slide rail 54 and a second slide seat 52, the second slide rail 54 is slidably engaged with the first slide seat 32, and the second slide seat 52 is fixed to the second slide rail 54. Further, the first sliding seat 32 is provided with a second sliding chute 323, the second sliding chute 323 penetrates through the first sliding seat 32 along the second direction Y, and the second slide rail 54 penetrates through the second sliding chute 323 and is in sliding fit with the second sliding chute 323. The second sliding seat 52 is connected to a side of the second slide rail 54 away from the first sliding seat 32. The second sliding seat 52 can slide along the second direction Y relative to the mounting seat 10, and in some embodiments, the second moving stage 50 can further include a movable driving member, which can be a driving source such as an air cylinder, a hydraulic cylinder, or a linear motor, and the second sliding seat 52 can be connected to an output end of the movable driving member and can slide along the second direction Y under the driving of the movable driving member, so as to adjust the position of the outlet pipe 70 in the second direction Y.

In this embodiment, the second moving stage 50 further includes a second guiding member 56, and the second guiding member 56 is used for guiding the sliding of the second sliding seat 52, so that the relative movement between the second sliding rail 54 and the first sliding seat 32 is smoother. The second guide member 56 is substantially in the shape of a circular rod, and the second guide member 56 is slidably disposed through the first sliding seat 32 along the second direction Y. In order to facilitate the installation of the second guide 56, the second moving stage 50 may further include two second mounting plates 521, where the number of the second mounting plates 521 is two, and the two second mounting plates 521 are respectively disposed at two ends of the second sliding seat 52 and are respectively located at two sides of the first sliding seat 32. Both ends of the second guide 56 are fixedly connected to the two second mounting plates 521, respectively. The number of the second guides 56 is two, two second guides 56 are substantially parallel to each other, and the two second guides 56 are arranged in parallel at intervals in the first direction X.

Referring to fig. 2 and 5, the air outlet pipe 70 is connected to the second sliding seat 52, the air outlet pipe 70 is used for connecting the air pipe 203 to inflate the container 300 to be tested, and the container 300 to be tested has an air inlet 301. The inner wall of the end, departing from the second sliding seat 52, of the air outlet pipe 70 is provided with an inner chamfer 71, the air inlet 301 is provided with an outer chamfer 3012, when the air inlet 301 is sleeved with the air outlet pipe 70, the inner chamfer 71 is buckled on the outer chamfer 3012, and the matching of the outer chamfer 3012 and the inner chamfer 71 can provide a guiding effect for the air outlet pipe 70. In the process of guiding the air outlet pipe 70 by matching the outer chamfer 3012 and the inner chamfer 71, the second sliding seat 52 and the container 300 to be tested can move relatively, for example, the second sliding seat 52 moves relative to the container 300 to be tested based on the outer chamfer 3012, and the first moving table 30 and the second moving table 50 provide freedom in two directions (the first direction X and the second direction Y), so that the air outlet pipe 70 is allowed to move more freely, and smooth centering and guiding are realized.

In an actual production line, due to the difference of the position of the supplied materials of the product and the difference of the precision of the product, the air outlet pipe 70 and the air inlet 301 are not coaxial, so that air leakage occurs during testing, and the normal testing is difficult. In order to facilitate the outlet pipe mouth of the outlet pipe 70 to be adjusted to be coaxial with the inlet 301, in this embodiment, the centering and holding mechanism 100 further includes a hinge mechanism 90, and the outlet pipe 70 is rotatably connected to the second sliding seat 52 through the hinge mechanism 90.

The outlet duct 70 intersects the axis of the outlet duct 70 based on at least one axis of rotation of the hinge mechanism 90 relative to the second sliding seat 52, i.e., rotation of the outlet duct 70 relative to the second sliding seat 52 changes the angle of the outlet duct 70 relative to the second sliding seat 52. In this embodiment, the air outlet tube 70 can be deflected at any angle, and can be perfectly coaxial with the air inlet 301 under the guiding action of the outer chamfer 3012 and the inner chamfer 71, so that the air outlet tube 70 and the air inlet 301 can be aligned conveniently, and the testing efficiency is improved.

Referring again to fig. 4, the present disclosure is not limited to the specific structure of the hinge mechanism 90, for example, in the present embodiment, the hinge mechanism 90 may include a spherical bearing 92. To facilitate mounting of the spherical bearing 92, the hinge mechanism 90 further comprises a mounting block 93, the mounting block 93 being connected to the second sliding seat 52, which is substantially circular truncated cone shaped. The mount 93 has a mount cavity 932, the mount cavity 932 penetrates the mount 93 in the longitudinal direction of the connecting strut 13, and the spherical bearing 92 is disposed in the mount cavity 932.

The outlet pipe 70 comprises a pipe body 72 and a limiting part 74, the pipe body 72 is arranged in the installation cavity 932 in a penetrating manner and arranged on the spherical bearing 92 in a penetrating manner, the pipe body 72 is provided with a first end 721 and a second end 723 which are opposite, the first end 721 is arranged in the installation cavity 932, and the second end 723 extends out of the installation cavity 932 to be matched with the air inlet 301 for inflation. The stopper 74 is substantially annular plate-shaped, and the stopper 74 is fixedly fitted to the outer periphery of the first end 721 of the pipe 72 on the side close to the spherical bearing 92 and protrudes from the outer periphery of the pipe 72. The outer diameter of the stopper 74 is larger than the outer diameter of the pipe 72, and the stopper 74 abuts against the end face of the spherical bearing 92. The outlet pipe 70 can be arbitrarily deflected by a certain angle relative to the mounting table 93 based on the spherical bearing 92, so as to be adjusted to be coaxial with the air inlet 301 under the traction of the matching of the outer chamfer 3012 and the inner chamfer 71 (shown in fig. 5), and the efficiency and the detection accuracy of the air tightness test are improved.

The mounting platform 93 may also be provided with mounting channels 934, the mounting channels 934 being provided along a radial extension of the mounting platform 93, the mounting channels 934 communicating with an exterior of the mounting platform 93 and the mounting cavity 932. The air pipe 203 is arranged in the installation channel 934 in a penetrating manner, one end of the air pipe 203 extends into the installation cavity 932 and is connected to the side wall of the first end 721, and the air pipe 203 is communicated with the air outlet pipe 70.

Referring to fig. 6, in other embodiments, the hinge mechanism 90 may include a first hinge 94 and a second hinge 96. The second hinge member 96 is connected to the second sliding seat 52 by the first hinge member 94, and the second hinge member 96 rotates around the first rotation axis O1 relative to the second sliding seat 52 based on the first hinge member 94. The outlet duct 70 is connected to the first hinge member 94 by a second hinge member 96, the outlet duct 70 rotates around a second rotation axis O2 based on the second hinge member 96 relative to the first hinge member 94, the second rotation axis O2 intersects (e.g., is perpendicular to) the first rotation axis O1, and at least one of the second rotation axis O2 and the first rotation axis O1 intersects with an axis of the outlet duct 70. Therefore, the first hinge part 94 and the second hinge part 96 can provide at least two directions of freedom for the outlet pipe 70 to rotate, so that the outlet pipe 70 can rotate in multiple directions, thereby ensuring that the angle of the outlet pipe 70 relative to the second sliding seat 52 can be changed when the outlet pipe 70 rotates relative to the second sliding seat 52, and the angle of the outlet pipe 70 relative to the second sliding seat 52 can be adapted to the angle of the air inlet 301. Of course, on this basis, the hinge mechanism 90 may further include a third hinge (not shown), the outlet duct 70 is connected to the second hinge 96 through the third hinge and can rotate around a third rotation axis relative to the second hinge 96 based on the third hinge, and the third rotation axis, the second rotation axis O2 and the first rotation axis O1 are orthogonal to each other, so as to provide three directions of rotational freedom for the outlet duct 70, and make the rotation of the outlet duct 70 more flexible.

In these embodiments, the first hinge 94, the second hinge 96 and the third hinge can be realized by a rotatable rotating shaft, which is not limited in this specification. For example, the first hinge member 94 may be a bracket structure and pivotally connected to the second sliding seat 52, or/and the second hinge member 96 may be a bracket structure and pivotally connected to the first hinge member 94, or/and the third hinge member may be a bracket structure and pivotally connected to the second hinge member 96, and the outlet duct 70 may be mounted on the bracket structure of the third hinge member, or may be directly mounted on the bracket structure of the second hinge member 96 (when the hinge mechanism 90 does not include the third hinge member). Further, the outlet pipe 70 may also be mounted to the third hinge or the second hinge 96 through the spherical bearing 92, for example, the spherical bearing 92 (as shown in fig. 4) may be mounted to the third hinge or the second hinge 96, that is, the spherical bearing 92 is connected to the second sliding seat 52 through the third hinge or the second hinge 96, and the outlet pipe 70 is disposed through the spherical bearing 92.

In this embodiment, the second rotation axis O2 and the first rotation axis O1 are both parallel to the surface of the second sliding seat 52 departing from the second sliding rail 54, the first rotation axis O1 may be substantially perpendicular to the second rotation axis O2, and both the second rotation axis O2 and the first rotation axis O1 intersect with the axis of the air outlet pipe 70. The air outlet pipe 70 can be arbitrarily deflected by a certain angle relative to the second sliding seat 52 based on the first hinge part 94 and the second hinge part 96, so as to be adjusted to be coaxial with the air inlet 301 under the traction of the matching of the outer chamfer 3012 and the inner chamfer 71 (shown in fig. 5), and the efficiency and the detection accuracy of the air tightness test are improved.

Referring to fig. 3 and 7, in other embodiments, the hinge mechanism 90 may further include a spherical hinge 98, the outlet tube 70 is connected to the second sliding seat 52 by the spherical hinge 98, and the spherical hinge 98 can provide at least two directions of rotational freedom for the outlet tube 70, so that the outlet tube 70 can rotate in multiple directions.

When the centering and holding mechanism 100 provided in the embodiment of the present application is applied to the air tightness testing apparatus 200, the container 300 to be tested is held on the worktable 205, and the air pipe 203 is connected to the air outlet pipe 70. The position of the outlet pipe 70 in the first direction X relative to the inlet port 301 is adjusted by moving the first slide holder 32 so as to approach the inlet port 301. The position of the outlet duct 70 in the second direction Y relative to the inlet opening 301 is then adjusted by moving the second slide holder 52 so as to be aligned with the inlet opening 301. The main body 201 controls the air outlet pipe 70 to be close to the air inlet 301, and is sleeved at the air inlet 301, if the air outlet pipe 70 is not coaxial with the air inlet 301, the outer chamfer 3012 at the air inlet 301 and the inner chamfer 71 of the air outlet pipe 70 are matched to pull the air outlet pipe 70 to rotate or/and move until the air outlet pipe 70 and the air inlet 301 are coaxial, finally, the air outlet pipe 70 is sleeved outside the air inlet 301, and the air conveying pipe 203 starts to convey air to inflate the container 300 to be tested to test the air tightness of the container.

The centering and holding mechanism 100 provided by the application can realize the arbitrary movement of the air outlet pipe 70 on the plane of the first direction X and the second direction Y, and the air outlet pipe 70 can also deflect at will by a certain angle through the hinge mechanism 90 so as to be adjusted to be coaxial with the air inlet 301 under the traction of the matching of the outer chamfer 3012 and the inner chamfer 71, thereby greatly improving the testing efficiency and the testing accuracy.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made. Such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (9)

1. A centering and holding mechanism is applied to air tightness testing equipment and comprises:

a mounting base;

a first mobile station slidably coupled to the mount, the first mobile station being movable in a first direction relative to the mount;

a second mobile station slidably coupled to the first mobile station, the second mobile station being movable relative to the mount in a second direction, the first direction and the second direction intersecting;

a hinge mechanism connected to the second mobile station;

and the air outlet pipe is rotatably connected to the second mobile platform through the hinge mechanism and is used for connecting the air pipe of the air tightness testing equipment, and the air outlet pipe is intersected with the axis of the air outlet pipe based on at least one rotating axis of the hinge mechanism, which rotates relative to the second mobile platform.

2. The centering and retaining mechanism as claimed in claim 1, wherein said hinge mechanism includes a spherical bearing, said spherical bearing is connected to said second movable stage, and said air outlet pipe is inserted through said spherical bearing.

3. The centering and retaining mechanism according to claim 2, wherein said outlet tube comprises a tube body and a position-limiting portion, said tube body is inserted through said spherical bearing, said position-limiting portion is connected to the outer periphery of said tube body and protrudes relative to the outer peripheral wall of said tube body, and said position-limiting portion abuts against the end face of said spherical bearing.

4. The centering and retaining mechanism according to claim 1, wherein said hinge mechanism includes a first hinge member and a second hinge member, said second hinge member being connected to said second mobile station through said first hinge member, said second hinge member being rotatable about a first rotation axis with respect to said second mobile station based on said first hinge member; the air outlet pipe is connected to the first hinge through the second hinge, the air outlet pipe can rotate around a second rotating shaft relative to the first hinge based on the second hinge, the second rotating shaft is intersected with the first rotating shaft, and at least one of the second rotating shaft and the first rotating shaft is intersected with the axis of the air outlet pipe; or the hinge mechanism comprises a spherical hinge, and the air outlet pipe is connected to the second mobile station through the spherical hinge.

5. The centering and retaining mechanism according to any one of claims 1 to 4, wherein the mounting seat is provided with a first sliding groove, the first sliding groove extends along the first direction, the first mobile station comprises a first sliding seat and a first sliding rail, the first sliding rail is slidably embedded in the first sliding groove, the first sliding seat is connected to the first sliding rail, and the second mobile station is connected to the first sliding seat.

6. The centering and retaining mechanism of claim 5, wherein said first movable stage further comprises a first guiding member, said first guiding member is connected to said first sliding seat and extends along said first direction, and said first guiding member slidably penetrates through said mounting seat.

7. The centering and retaining mechanism according to any one of claims 1 to 4, wherein the second movable platform includes a second sliding seat and a second sliding rail, the second sliding rail slidably penetrates through the first movable platform along the second direction, the second sliding seat is connected to the second sliding rail, and the air outlet pipe is connected to the second sliding seat.

8. The centering and retaining mechanism of claim 7, wherein said second movable stage further comprises a second guiding member, said second guiding member is connected to said second sliding seat and extends along said second direction, said second guiding member is slidably disposed through said first movable stage.

9. An airtightness testing apparatus comprising:

a gas delivery pipe;

the centering and holding mechanism as claimed in any one of claims 1 to 8, wherein the gas pipe is connected to the gas outlet pipe and communicated with the gas outlet pipe.

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