CN213336632U - Air tightness test fixture - Google Patents

Abstract

The application relates to an air tightness test fixture which comprises an object placing seat, a driver, a push plate, an ejector rod and an elasticity test assembly, wherein the object placing seat is provided with a groove, the groove is provided with an opening, and a product to be tested is assembled at the opening of the groove; the driver is in transmission connection with the push plate, the ejector rod is fixedly connected with the push plate, the elastic testing assembly is movably connected with the push plate, the push plate is arranged corresponding to the object placing seat and is suspended above the object placing seat, and the driver push plate moves towards the direction close to or far away from the object placing seat to drive the ejector rod and the elastic testing assembly to be close to or far away from the object placing seat; the elastic testing component comprises a supporting rod, a rubber plug and an elastic piece, a perforation is arranged on the push plate, and the supporting rod is assembled and fixed in the perforation and movably connected to the push plate; the rubber plug is arranged at one end of the supporting rod, which is far away from the push plate, and is used for sealing the through hole; one end of the elastic piece is connected with the push plate in a butt mode, and the other end of the elastic piece is connected with one end, provided with the rubber plug, of the supporting rod in a butt mode. The air tightness test fixture can test the air tightness of a product with a through hole.

Description

Air tightness test fixture

Technical Field

The application relates to the field of air tightness tests, in particular to an air tightness test clamp.

Background

The air tightness test is to test the sealing of the product, and to avoid the generation of defective products so as to meet the design requirements. For some products which cover the cavity through the cover, the cover may be provided with other through holes such as screw holes and the like for installing and fixing parts, for the air tightness test, only the air tightness of the lower side part provided with the cavity and the air tightness of the cover are tested respectively, the air tightness of the lower side part is tested well, only a rubber tree with an opening of the cavity is needed, for the cover, the air tightness of the edge of the cover is difficult to test due to the fact that other through holes are arranged, and when the cover covers the lower side part, the conclusion on whether the contact position is sealed or not is difficult to be drawn. Therefore, for the airtightness test, when the product to be tested is provided with the through-hole, the airtightness test of the product becomes difficult.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide an air-tightness test jig for solving the problem that when a product to be tested is provided with a through hole, air-tightness test of the product becomes difficult.

An air tightness test fixture comprises an object placing seat, a driver, a push plate, a push rod and an elastic test assembly, wherein,

the article placing seat is provided with a groove, the groove is provided with an opening, and a product to be tested is assembled at the opening of the groove;

the driver is in transmission connection with the push plate, the ejector rod is fixedly connected with the push plate, the elasticity testing assembly is movably connected with the push plate, the push plate is arranged corresponding to the object placing seat and suspended above the object placing seat, and the push plate moves towards the direction close to or far away from the object placing seat under the driving of the driver, so that the ejector rod and the elasticity testing assembly are driven to be close to or far away from the object placing seat;

the elastic testing assembly comprises a supporting rod, a rubber plug and an elastic piece, a through hole is formed in the push plate, and the supporting rod is assembled and fixed in the through hole and movably connected to the push plate; the rubber plug is arranged at one end of the supporting rod, which is far away from the push plate, corresponds to the through hole on the product to be tested and is used for sealing the through hole; one end of the elastic piece is abutted against the push plate, and the other end of the elastic piece is abutted against one end of the supporting rod, which is provided with the rubber plug.

In one embodiment, the supporting rod is assembled in the through hole through a damping piece, and when the supporting rod is subjected to an external force to a certain extent, the supporting rod and the push plate can generate relative movement.

In one embodiment, a fixing position is arranged at one end of the supporting rod, which is far away from the push plate, and the rubber plug is at least partially contained in the fixing position.

In one embodiment, the distance between one end of the rubber plug far away from the push plate and the push plate is defined as H1, the distance between one end of the top rod far away from the push plate and the push plate is defined as H2, and H1 is larger than H2.

In one embodiment, one end of the supporting rod, which is far away from the push plate, is further provided with a blocking piece, and one end of the elastic piece, which is far away from the push plate, abuts against the blocking piece.

In one embodiment, the elasticity test assembly is provided in plurality.

In one embodiment, the struts of different elasticity test assemblies are fixedly connected to each other, so that the struts of different elasticity test assemblies move synchronously.

In one embodiment, the test device further comprises an ejector piece, wherein at least part of the ejector piece is accommodated in the groove and used for ejecting the product to be tested out of the groove.

In one embodiment, the ejection member comprises a power member and an ejection mechanism, the power member is in transmission connection with the ejection mechanism, the ejection mechanism is arranged in the groove and moves under the driving of the power member when a product to be tested is assembled at the opening of the groove, so as to eject the product to be tested, and the product to be tested is separated from the storage seat and is fixed.

In one embodiment, the device further comprises a shell, the shell at least comprises a top plate and a bottom plate, the top plate and the bottom plate are oppositely arranged and fixed with each other through a support rod or a support plate, the object placing seat is arranged on the bottom plate, and the driver is arranged on the top plate;

the push plate is fixedly connected with the top plate, the top plate is provided with a through hole, the guide rod penetrates through the through hole, and in the process that the driver drives the push plate to move, part of the guide rod is always contained in the through hole.

Above-mentioned gas tightness test fixture, through fixing ejector pin and elasticity test subassembly to the push pedal, driver drive push pedal removes, and then drive ejector pin and elasticity test subassembly simultaneously and be close to the test product that awaits measuring on putting the thing seat, at the removal in-process, the plug of elasticity test subassembly says earlier that the through-hole is stopped up, then borrows the hard connection relation between roof and the push pedal, promote the test product that awaits measuring through the roof and remove, the swing joint relation of rethread branch and push pedal, if branch and push pedal produce relative movement, then explain the gas tightness of the peripheral sealing washer of the test product that awaits measuring is good, the gas tightness test of the product that has the through-hole has.

Drawings

Fig. 1 is a schematic structural diagram of an airtight testing fixture according to an embodiment of the present application when a product to be tested is assembled;

fig. 2 is a schematic structural diagram of an air tightness test fixture according to an embodiment of the present application when a product to be tested is not assembled;

fig. 3 is a schematic structural view of a fixing seat of an air tightness test fixture according to an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of a push plate of the airtightness testing jig according to the embodiment of the present application;

FIG. 5 is a schematic view of an assembly structure of a push plate, a push rod and an elastic testing component of the air tightness testing fixture according to an embodiment of the present application;

fig. 6 is a schematic cross-sectional view illustrating an elastic testing assembly according to an embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, a schematic structural diagram of a hermeticity test fixture 10 according to an embodiment of the present application is schematically shown. As shown in fig. 1, the air tightness testing fixture 10 includes a holder 110, a driver 120, a push plate 130, a top rod 140 and an elastic testing component 150, wherein the holder 110 is used for placing a product to be tested, the driver 120 is connected to the push plate 130 in a driving manner, the top rod 140 is fixedly connected to the push plate 130, the elastic testing component 150 is movably connected to the push plate 130, the driver 120 drives the push plate 130 to move, and the air tightness is determined by the relative displacement between the elastic testing component 150 and the push plate 130.

Referring to fig. 3, a recess 110a is disposed on the object holder 110, the recess 110a has an opening, and the product to be tested is mounted at the opening of the recess 110 a. For example, when the product to be tested is a cap, the cap covers the groove 110a, and the sealing ring around the cap abuts against the sidewall of the opening of the groove 110 a. It will be appreciated that the design of the opening of the recess 110a may be configured to conform to the design of the mating member of the cover (i.e., the lower member of the background art) in order to maximize product placement.

It can be understood that when the cover covers the opening of the groove 110a, the cavity formed by the cover and the groove 110a has a certain volume, and air is provided in the cavity to facilitate the air tightness test.

Referring to fig. 2, in one or more embodiments, an ejection member 160 may be further included, and the ejection member 160 is at least partially received in the groove 110a and is used for ejecting the product to be tested out of the groove 110 a. For example, the ejecting member 160 may include a power member 161 and an ejecting mechanism 163, the power member 161 is connected to the ejecting mechanism 163 in a transmission manner, and the ejecting mechanism 163 is disposed in the groove 110a and moves under the driving of the power member 161 when the product to be tested is assembled at the opening of the groove 110a, so as to eject the product to be tested, and the product to be tested is separated from the object placing base 110. When the power member 161 is small enough and the recess 110a is large enough to place the power member 161, the power member 161 may also be disposed in the recess 110 a. In the embodiment shown in fig. 2, the power element 161 is a cylinder, which has a large volume and is disposed outside the storage seat 110. For example, the power element 161 is disposed on a side of the storage seat 110 away from the push plate 130, and is fixedly connected to the storage seat 110. It can be understood that the power unit 161 is connected to the ejecting mechanism 163 through a transmission shaft, and the transmission shaft passes through the bottom of the recess 110a and can maintain air tightness at the contact position of the transmission shaft and the object placing seat 110.

Referring to fig. 1, the rack may further include a housing 170, and the object holder 110, the driver 120, and the push plate 130 are all disposed on the housing 170. Specifically, the housing 170 at least includes a top plate 171 and a bottom plate 173, the top plate 171 and the bottom plate 173 are disposed opposite to each other and fixed to each other by a support rod 175 or a support plate 177, and the storage holder 110 and the ejector 160 are disposed on the bottom plate 173. Specifically, the receptacle 110 is fixedly connected to the bottom plate 173 by a plurality of support columns 179, such that the receptacle 110 is suspended with respect to the bottom plate 173, and the ejector 160 is disposed below the receptacle 110 and is fixedly connected to the receptacle 110.

The driver 120 is disposed on the top plate 171, and the driver 120 may be specifically an air cylinder, a motor, a steering engine, and the like.

Referring to fig. 1 and 2, the push plate 130 is disposed corresponding to the object holder 110 and suspended above the object holder 110, and under the driving of the driver 120, the push plate 130 moves toward or away from the object holder 110, so as to drive the push rod 140 and the elastic testing component 150 to approach or leave the object holder 110. For example, the driver 120 has an output shaft, and the end of the output shaft is fixed on the end surface of the push plate 130 facing away from the storage seat 110, so that when the driver 120 provides power, the rotation of the output shaft drives the movement of the push plate 130, so that the push plate 130 approaches to or departs from the storage seat 110.

Referring to fig. 1 and 4, in some embodiments, the device further includes a guide rod 180, one end of the guide rod 180 is fixedly connected to the push plate 130, the top plate 171 is provided with a through hole 171a, the guide rod 180 passes through the through hole 171a, and the guide rod 180 is always partially received in the through hole 171a during the movement of the push plate 130 driven by the driver 120. Therefore, as the guide rod 180 is partially accommodated in the through hole 171a all the time, the through hole 171a limits the position of the guide rod 180, and thus indirectly corrects the position of the push plate 130, and guides the movement of the push plate 130, thereby ensuring that the push plate 130 moves along a preset path.

The number of the guide rods 180 may be set to at least two to provide a better guiding function. For example, in the embodiment shown in fig. 1, two guide rods 180 are provided.

A bearing may be further assembled and fixed at the through hole 171a, and the guide rod 180 is fixedly connected to the top plate 171 through the bearing, so as to realize smooth movement during the movement of the guide rod 180.

Referring to fig. 4 and 5, one end of the top bar 140 is fixedly connected to the push plate 130, and the other end is a free end, which abuts against the product to be tested. Under the driving of the driver 120, the push rod 140 moves toward the direction close to the object placing seat 110, and when the free end abuts against the product to be tested, if the driver 120 continues to drive, the push rod 140 has a tendency of pushing the product to be tested to move toward the bottom of the groove 110 a.

Referring to fig. 4 and 5, the elasticity testing assembly 150 includes a supporting rod 151, a rubber plug 153 and an elastic member 155, a through hole 130a is formed in the push plate 130, the supporting rod 151 is fixed in the through hole 130a and movably connected to the push plate 130, the rubber plug 153 is disposed at one end of the supporting rod 151 away from the push plate 130, one end of the elastic member 155 abuts against the push plate 130, and the other end abuts against one end of the supporting rod 151 at which the rubber plug 153 is disposed.

Specifically, the rod 151 is fitted into the through hole 130a, and when the rod 151 is subjected to an external force greater than a certain level, relative movement between the rod 151 and the push plate 130 is generated. For example, the rod 151 is fitted into the through hole 130a by a damping member, and when the rod 151 is subjected to an external force sufficient to overcome the damping provided by the damping member, the rod 151 moves relative to the push plate 130.

One end of the supporting rod 151, which is far away from the pushing plate 130, may be provided with a fixing position 151a, and the rubber plug 153 is at least partially accommodated in the fixing position 151 a. For example, the rubber plug 153 is fixed to the fixing station 151a by tight fitting.

Referring to fig. 5 and 6, a blocking member 1511 may be further disposed at an end of the supporting rod 151 away from the push plate 130, and an end of the elastic member 155 away from the push plate 130 abuts against the blocking member 1511, in the illustrated embodiment, the blocking member 1511 is two extending rods, and it is understood that the blocking member 1511 may be an outwardly extending annular boss, a plurality of convex columns, or other forms.

The rubber plug 153 corresponds to a through hole in the product to be tested and is used for sealing the through hole, so that the product to be tested can be subjected to air tightness test after the through hole is sealed.

The elastic member 155 may be a spring. Of course, the shape may be a spring plate or other shapes.

In order to ensure that the through hole is blocked firstly and then the gas tightness test is carried out, the distance between one end of the rubber plug 153 far away from the push plate 130 and the push plate 130 is defined as H1, the distance between one end of the top rod 140 far away from the push plate 130 and the push plate 130 is defined as H2, and H1 is larger than H2.

Referring to fig. 5, in one or more embodiments, the elastic testing assembly 150 may be provided in a plurality, and when the elastic testing assembly 150 is provided in a plurality, the supporting rods 151 of different elastic testing assemblies 150 may be fixedly connected to each other, so that the supporting rods 151 of different elastic testing assemblies 150 can move synchronously. For example, the supporting rods 151 of the different elastic testing assemblies 150 are connected by a cross bar, and the rubber plugs 153 and the push plate 130 are respectively located at two sides of the cross bar. It will be appreciated that the number of the elastic test elements 150 is adapted to the number of the through holes on the product to be tested.

When driving piece drive push pedal 130 removed, under the initial condition, roof 171, plug 153 were the contact product that awaits measuring, and back between predetermineeing, plug 153 compares ejector pin 140 and touches the product that awaits measuring earlier, and in plug 153 entered into the through-hole of the product that awaits measuring, seals the through-hole, then roof 171 contact product that awaits measuring. The driver 120 continues to drive, and under the combined action of the top plate 171 and the supporting rod 151, the product to be tested has a tendency to move toward the bottom of the groove 110a, and if the air tightness is good, the air pressure in the groove 110a is increased, the product to be tested provides a reaction force to the ejector pin 140 and the rubber plug 153, because the top rod 140 is hard connected with the push plate 130, the supporting rod 151 is movably connected with the push plate 130, when the reaction force is applied to the supporting rod 151 through the rubber plug 153, the elastic member 155 is compressed, so that the supporting rod 151 is pushed to move toward the push plate 130, and if the airtightness is good, the reaction force is gradually increased as the air pressure in the groove 110a is increased, the reaction force and the driving force of the driver 120 provided through the push plate 130 are respectively applied to both ends of the spring, when the sum of the reaction force and the driving force is greater than the damping between the supporting rod 151 and the push plate 130, the supporting rod 151 and the push plate 130 are relatively moved. If the supporting rod 151 and the pushing plate 130 move relatively, it is indicated that the sealing ring around the product to be tested has good air tightness.

Above-mentioned gas tightness test fixture 10, through fixing ejector pin 140 and elasticity test assembly 150 to push pedal 130 on, driver 120 drive push pedal 130 removes, and then drive ejector pin 140 and elasticity test assembly 150 simultaneously and be close to the examination product that awaits measuring on putting thing seat 110, in the removal in-process, the plug 153 of elasticity test assembly 150 says the through-hole earlier and blocks up, then borrows the hard joint relation between roof 171 and the push pedal 130, promote the examination product that awaits measuring through roof 171 and remove, rethread branch 151 and the swing joint relation of push pedal 130, if branch 151 and push pedal 130 produce relative movement, it is good to explain the gas tightness of the peripheral sealing washer of examination product that awaits measuring, the gas tightness test has been realized promptly.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The air tightness test fixture is characterized by comprising an object placing seat, a driver, a push plate, a push rod and an elastic test assembly, wherein,

the article placing seat is provided with a groove, the groove is provided with an opening, and a product to be tested is assembled at the opening of the groove;

the driver is in transmission connection with the push plate, the ejector rod is fixedly connected with the push plate, the elasticity testing assembly is movably connected with the push plate, the push plate is arranged corresponding to the object placing seat and suspended above the object placing seat, and the push plate moves towards the direction close to or far away from the object placing seat under the driving of the driver, so that the ejector rod and the elasticity testing assembly are driven to be close to or far away from the object placing seat;

the elastic testing assembly comprises a supporting rod, a rubber plug and an elastic piece, a through hole is formed in the push plate, and the supporting rod is assembled and fixed in the through hole and movably connected to the push plate; the rubber plug is arranged at one end of the supporting rod, which is far away from the push plate, corresponds to the through hole on the product to be tested and is used for sealing the through hole; one end of the elastic piece is abutted against the push plate, and the other end of the elastic piece is abutted against one end of the supporting rod, which is provided with the rubber plug.

2. The airtightness test fixture according to claim 1, wherein the support rod is fitted in the through hole via a damping member, and when the support rod is subjected to an external force greater than a certain degree, relative movement can be generated between the support rod and the push plate.

3. The airtightness test fixture according to claim 1, wherein one end of the support rod, which is away from the push plate, is provided with a fixing position, and the rubber plug is at least partially accommodated in the fixing position.

4. The airtightness test fixture according to claim 1, wherein a distance between an end of the rubber plug remote from the pusher plate and the pusher plate is defined as H1, a distance between an end of the ejector pin remote from the pusher plate and the pusher plate is defined as H2, and H1 is greater than H2.

5. The airtightness test fixture according to claim 1, wherein one end of the support rod, which is away from the push plate, is further provided with a blocking member, and one end of the elastic member, which is away from the push plate, abuts against the blocking member.

6. The hermeticity test fixture of claim 1, wherein the resilient test assembly is provided in plurality.

7. The tightness test fixture of claim 6, wherein the struts of different elasticity test assemblies are fixedly connected to each other such that the struts of different elasticity test assemblies move in unison.

8. The airtightness test fixture according to claim 1, further comprising an ejector member, which is at least partially accommodated in the groove, for ejecting the product to be tested out of the groove.

9. The airtightness test fixture according to claim 8, wherein the ejection member includes a power member and an ejection mechanism, the power member is connected to the ejection mechanism in a transmission manner, and the ejection mechanism is disposed in the groove and moves under the driving of the power member when the product to be tested is assembled at the opening of the groove, so as to eject the product to be tested, and the product to be tested is separated from the storage seat.

10. The airtightness test fixture according to claim 1, further comprising a housing, wherein the housing includes at least a top plate and a bottom plate, the top plate and the bottom plate are disposed opposite to each other and fixed to each other by a support rod or a support plate, the placement seat is disposed on the bottom plate, and the driver is disposed on the top plate;

the push plate is fixedly connected with the top plate, the top plate is provided with a through hole, the guide rod penetrates through the through hole, and in the process that the driver drives the push plate to move, part of the guide rod is always contained in the through hole.

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