Air tightness test fixture

Abstract

The present application relates to an airtightness test fixture, including a storage seat, a driver, a push plate, a push rod and an elastic test assembly. The storage seat is provided with a groove, the groove has an opening, and the product to be tested is assembled at the opening of the groove; the driver is connected to the push plate by transmission, the push rod is fixedly connected to the push plate, the elastic test assembly is movably connected to the push plate, the push plate is arranged corresponding to the storage seat, and is suspended above the storage seat. The driver push plate moves in the direction of approaching or moving away from the storage seat, driving the push rod and the elastic test assembly to approach or move away from the storage seat; the elastic test assembly includes a support rod, a rubber plug and an elastic member, a perforation is provided on the push plate, the support rod is assembled and fixed in the perforation, and is movably connected to the push plate; the rubber plug is provided at one end of the support rod away from the push plate, and the rubber plug is used to seal the through hole; one end of the elastic member abuts against the push plate, and the other end abuts against one end of the support rod provided with the rubber plug. The airtightness test fixture can perform airtightness tests on products with through holes.

Description

Technical Field

[0001] The present application relates to the field of air tightness testing, and in particular to an air tightness testing fixture. Background Art

[0002] The airtightness test is to test the sealing of the product to prevent the production of defective products and meet the design requirements. For some products that cover the cavity with a lid, there may be other through holes such as screw holes on the lid for installing and fixing parts. For the airtightness test, it is sufficient to test the airtightness of the lower part with the cavity and the lid separately. The airtightness of the lower part is easier to test, and only a rubber tree with an opening to the cavity is needed. For the lid, since other through holes are provided, the airtightness of the edge of the lid is difficult to test. When the lid is covered on the lower part, it is difficult to conclude whether it is sealed at the contact position. Therefore, for the airtightness test, when the product to be tested is provided with through holes, the airtightness test of the product becomes more difficult. Summary of the invention

[0003] Based on this, it is necessary to provide an airtightness test fixture to address the problem that when the product to be tested is provided with a through hole, the airtightness test of the product becomes more difficult.

[0004] An air tightness test fixture includes a storage seat, a driver, a push plate, a push rod and an elastic test assembly, wherein:

[0005] The storage seat is provided with a groove, the groove has an opening, and the product to be tested is assembled at the opening of the groove;

[0006] The driver is transmission-connected to the push plate, the push rod is fixedly connected to the push plate, and the elastic test assembly is movably connected to the push plate. The push plate is arranged corresponding to the storage seat and is suspended above the storage seat. Under the drive of the driver, the push plate moves toward or away from the storage seat, thereby driving the push rod and the elastic test assembly to move toward or away from the storage seat.

[0007] The elastic testing assembly includes a support rod, a rubber plug and an elastic member. The push plate is provided with a through hole. The support rod is assembled and fixed in the through hole and is movably connected to the push plate. The rubber plug is provided at one end of the support rod away from the push plate. The rubber plug corresponds to the through hole on the product to be tested and is used to seal the through hole. One end of the elastic member abuts against the push plate, and the other end abuts against one end of the support rod provided with the rubber plug.

[0008] In one of the embodiments, the support rod is assembled in the through hole through a damping member, and when the external force applied to the support rod is greater than a certain level, relative movement can occur between the support rod and the push plate.

[0009] In one of the embodiments, a fixing position is provided at one end of the support rod away from the push plate, and the rubber plug is at least partially accommodated in the fixing position.

[0010] In one embodiment, the distance between the end of the rubber plug away from the push plate and the push plate is defined as H1, the distance between the end of the push rod away from the push plate and the push plate is defined as H2, and H1 is greater than H2.

[0011] In one of the embodiments, a blocking member is further provided at one end of the support rod away from the push plate, and one end of the elastic member away from the push plate abuts against the blocking member.

[0012] In one embodiment, the elastic testing assembly is provided in plurality.

[0013] In one embodiment, the support rods of different elastic testing assemblies are fixedly connected to each other so that the support rods of different elastic testing assemblies can move synchronously.

[0014] In one of the embodiments, an ejector is further included, wherein the ejector is at least partially received in the groove and is used to eject the product to be tested out of the groove.

[0015] In one of the embodiments, the ejection member includes a power member and an ejection mechanism, the power member is transmission-connected to the ejection mechanism, the ejection mechanism is disposed in the groove, and when the product to be tested is assembled at the opening of the groove, the ejection mechanism moves under the drive of the power member to eject the product to be tested, so that the product to be tested is detached from the storage seat.

[0016] In one embodiment, it further comprises a housing, the housing comprising at least a top plate and a bottom plate, the top plate and the bottom plate are arranged opposite to each other and fixed to each other by a support rod or a support plate, the storage seat is arranged on the bottom plate, and the driver is arranged on the top plate;

[0017] It also includes a guide rod, one end of which is fixedly connected to the push plate, and a through hole is provided on the top plate. The guide rod passes through the through hole, and when the driver drives the push plate to move, the guide rod is always partially accommodated in the through hole.

[0018] The above-mentioned air tightness test fixture fixes the push rod and the elastic test assembly to the push plate, and the driver drives the push plate to move, thereby simultaneously driving the push rod and the elastic test assembly to approach the product to be tested on the storage seat. During the movement, the rubber plug of the elastic test assembly first blocks the through hole, and then uses the hard connection between the top plate and the push plate to push the product to be tested to move through the top plate, and then through the movable connection between the support rod and the push plate, if the support rod and the push plate produce relative movement, it means that the air tightness of the sealing ring around the product to be tested is good, that is, the air tightness test of the product with a through hole is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an airtightness test fixture according to an embodiment of the present application when a product to be tested is assembled therein;

[0020] Figure 2 This is a schematic structural diagram of an airtightness test fixture according to an embodiment of the present application when no product to be tested is assembled;

[0021] Figure 3 This is a schematic structural diagram of a fixing base of an airtightness test fixture according to an embodiment of the present application;

[0022] Figure 4 It is an enlarged view of the local structure of the push plate of the airtightness test fixture according to one embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the assembly structure of the push plate, the push rod, and the elasticity test assembly of the airtightness test fixture according to an embodiment of the present application;

[0024] Figure 6 It is a schematic cross-sectional structure diagram of an elasticity testing assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] See also Figure 1 and Figure 2 , exemplarily shows a schematic structural diagram of an airtightness test fixture 10 according to an embodiment of the present application. Figure 1 As shown, the airtightness test fixture 10 includes a storage seat 110, a driver 120, a push plate 130, a push rod 140 and an elastic test assembly 150. The storage seat 110 is used to place the product to be tested, the driver 120 is transmission-connected to the push plate 130, the push rod 140 is fixedly connected to the push plate 130, and the elastic test assembly 150 is movably connected to the push plate 130. The driver 120 drives the push plate 130 to move, and the airtightness is judged by the relative displacement between the elastic test assembly 150 and the push plate 130.

[0029] See also Figure 3 , a groove 110a is provided on the storage seat 110, and the groove 110a has an opening, and the product to be tested is assembled at the opening of the groove 110a. For example, when the product to be tested is a cover, the cover is covered with the groove 110a, and the sealing ring around the cover abuts against the side wall at the opening of the groove 110a. It can be understood that in order to place the product as much as possible, the structural design of the opening of the groove 110a can be set to be consistent with the design of the matching part (i.e., the lower part in the background technology) of the cover.

[0030] It can be understood that when the cover is covered on the opening of the groove 110a, the cavity formed by the cover and the groove 110a has a certain volume, and there is air in the cavity to facilitate airtightness testing.

[0031] See also Figure 2 In one or more embodiments, an ejector 160 may also be included. The ejector 160 is at least partially received in the groove 110a and is used to eject the product to be tested out of the groove 110a. For example, the ejector 160 may include a power member 161 and an ejector mechanism 163. The power member 161 is transmission-connected to the ejector mechanism 163. The ejector mechanism 163 is disposed in the groove 110a. When the product to be tested is assembled at the opening of the groove 110a, the power member 161 moves under the drive of the power member 161 to eject the product to be tested, so that the product to be tested is detached from the storage seat 110. When the power member 161 is small enough and the groove 110a is large enough to accommodate the power member 161, the power member 161 may also be disposed in the groove 110a. Figure 2In the illustrated embodiment, the power member 161 is a cylinder, which is relatively large and is therefore disposed outside the storage seat 110. For example, the power member 161 is disposed on a side of the storage seat 110 that is away from the push plate 130 and is fixedly connected to the storage seat 110. It can be understood that the power member 161 is connected to the ejection mechanism 163 via a transmission shaft, the transmission shaft passes through the bottom of the groove 110a, and the contact between the transmission shaft and the storage seat 110 can maintain airtightness.

[0032] See also Figure 1 , and may further include a housing 170, on which the storage seat 110, the driver 120, and the push plate 130 are all arranged. Specifically, the housing 170 includes at least a top plate 171 and a bottom plate 173, which are arranged opposite to each other and fixed to each other by a support rod 175 or a support plate 177, and the storage seat 110 and the ejector 160 are arranged on the bottom plate 173. Specifically, the storage seat 110 is fixedly connected to the bottom plate 173 by a plurality of pillars 179, so that the storage seat 110 is suspended relative to the bottom plate 173, and the ejector 160 is arranged below the storage seat 110 and fixedly connected to the storage seat 110.

[0033] The driver 120 is disposed on the top plate 171 , and the driver 120 may specifically be a cylinder, a motor, a steering gear, etc.

[0034] See also Figure 1 and Figure 2 The push plate 130 is arranged corresponding to the storage seat 110 and is suspended above the storage seat 110. Under the drive of the driver 120, the push plate 130 moves toward or away from the storage seat 110, thereby driving the push rod 140 and the elastic testing assembly 150 to move toward or away from the storage seat 110. For example, the driver 120 has an output shaft, and the end of the output shaft is fixed to the end surface of the push plate 130 away from the storage seat 110, so that when the driver 120 provides power, the push plate 130 is driven to move by the rotation of the output shaft, so that the push plate 130 moves toward or away from the storage seat 110.

[0035] See also Figure 1 and Figure 4 In some embodiments, a guide rod 180 is further included, one end of which is fixedly connected to the push plate 130. A through hole 171a is provided on the top plate 171. The guide rod 180 passes through the through hole 171a. When the driver 120 drives the push plate 130 to move, the guide rod 180 is always partially accommodated in the through hole 171a. Therefore, since the guide rod 180 is always partially accommodated in the through hole 171a, the through hole 171a forms a limit for the guide rod 180, and then indirectly corrects the position of the push plate 130, guides the movement of the push plate 130, and ensures that the push plate 130 moves along a preset path.

[0036] The number of guide rods 180 can be set to at least two to provide a better guiding effect. Figure 1 In the illustrated embodiment, two guide rods 180 are provided.

[0037] A bearing may also be fixedly mounted at the through hole 171 a , and the guide rod 180 is fixedly connected to the top plate 171 via the bearing, so as to achieve smooth movement during the movement of the guide rod 180 .

[0038] See also Figure 4 and Figure 5 One end of the push rod 140 is fixedly connected to the push plate 130, and the other end is a free end, and the free end abuts against the product to be tested. Under the drive of the driver 120, the push rod 140 moves toward the placement seat 110. 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 to push the product to be tested to move toward the bottom of the groove 110a.

[0039] See also Figure 4 and Figure 5 The elastic testing assembly 150 includes a support rod 151, a rubber plug 153 and an elastic member 155. A through hole 130a is provided on the push plate 130. The support rod 151 is assembled and fixed in the through hole 130a and is movably connected to the push plate 130. The rubber plug 153 is provided at one end of the support 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 support rod 151 where the rubber plug 153 is provided.

[0040] Specifically, the support rod 151 is assembled in the through hole 130a, and when the external force applied to the support rod 151 is greater than a certain degree, the support rod 151 and the push plate 130 can move relative to each other. For example, the support rod 151 is assembled in the through hole 130a through a damping member, and when the external force applied to the support rod 151 is sufficient to overcome the damping provided by the damping member, the support rod 151 moves relative to the push plate 130.

[0041] The end of the support rod 151 away from the push plate 130 may be provided with a fixing position 151a, and the rubber plug 153 is at least partially received in the fixing position 151a. For example, the rubber plug 153 is fixed to the fixing position 151a by a tight fit.

[0042] See also Figure 5 and Figure 6 A blocking member 1511 may also be provided at one end of the support rod 151 away from the push plate 130, and one 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 extension rods. It can be understood that the blocking member 1511 may also be other forms such as an annular boss extending outward, multiple bosses, etc.

[0043] The rubber plug 153 corresponds to the through hole on the product to be tested and is used to seal the through hole so that the product to be tested can be tested for air tightness after the through hole is sealed.

[0044] The elastic member 155 can be a spring, or a spring sheet or other forms.

[0045] In order to ensure that the through hole is blocked first and then the air tightness test is performed, the distance between the end of the rubber plug 153 away from the push plate 130 and the push plate 130 is defined as H1, and the distance between the end of the push rod 140 away from the push plate 130 and the push plate 130 is defined as H2, and H1 is greater than H2.

[0046] See also Figure 5 In one or more embodiments, a plurality of elastic test assemblies 150 may be provided. When a plurality of elastic test assemblies 150 are provided, the support rods 151 of different elastic test assemblies 150 may be fixedly connected to each other so that the support rods 151 of different elastic test assemblies 150 can move synchronously. For example, the support rods 151 of different elastic test assemblies 150 are connected by a cross bar, and the rubber plug 153 and the push plate 130 are respectively located on both sides of the cross bar. It can be understood that the number of elastic test assemblies 150 is adapted to the number of through holes on the product to be tested.

[0047] When the driving member drives the push plate 130 to move, in the initial state, the top plate 171 and the rubber plug 153 are both in contact with the product to be tested. After a preset time, the rubber plug 153 contacts the product to be tested before the push rod 140, and the rubber plug 153 enters the through hole of the product to be tested to seal the through hole, and then the top plate 171 contacts the product to be tested. The driver 120 continues to drive, and under the joint action of the top plate 171 and the support rod 151, the product to be tested has a tendency to move toward the bottom of the groove 110a. If the air tightness is good, the air pressure in the groove 110a increases, and the product to be tested provides a reaction force to the push rod 140 and the rubber plug 153. Since the push rod 140 and the push plate 130 are hard connected, and the support rod 151 and the push plate 130 are movably connected, when the reaction force acts on the support rod 151 through the rubber plug 153, it has a tendency to compress the elastic member 155 and push the support rod 151 to move toward the push plate 130. If the air tightness is good, as the air pressure in the groove 110a increases, the reaction force gradually increases. The reaction force and the driving force provided by the driver 120 through the push plate 130 act on the two ends of the spring respectively. When the sum of the reaction force and the driving force is greater than the damping between the support rod 151 and the push plate 130, the support rod 151 and the push plate 130 move relative to each other. If the support rod 151 and the push plate 130 move relative to each other, it means that the air tightness of the sealing ring around the product to be tested is good.

[0048] The air tightness test fixture 10 is configured such that the push rod 140 and the elastic test assembly 150 are fixed to the push plate 130, and the driver 120 drives the push plate 130 to move, thereby simultaneously driving the push rod 140 and the elastic test assembly 150 to approach the product to be tested on the storage seat 110. During the movement, the rubber plug 153 of the elastic test assembly 150 first blocks the through hole, and then the hard connection between the top plate 171 and the push plate 130 is used to push the product to be tested to move through the top plate 171, and then through the movable connection between the support rod 151 and the push plate 130, if the support rod 151 and the push plate 130 produce relative movement, it means that the air tightness of the sealing ring around the product to be tested is good, that is, the air tightness test is achieved.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An airtightness test fixture, characterized in that: It includes a storage seat, a driver, a push plate, a push rod and an elasticity test component, wherein: The storage seat is provided with a groove, the groove has an opening, and the product to be tested is assembled at the opening of the groove; The driver is transmission-connected to the push plate, the push rod is fixedly connected to the push plate, and the elastic test assembly is movably connected to the push plate. The push plate is arranged corresponding to the storage seat and is suspended above the storage seat. Under the drive of the driver, the push plate moves toward or away from the storage seat, thereby driving the push rod and the elastic test assembly to move toward or away from the storage seat. The elastic testing assembly comprises a support rod, a rubber plug and an elastic member. The push plate is provided with a through hole, the support rod is assembled and fixed in the through hole, and is movably connected to the push plate; the rubber plug is provided at one end of the support rod away from the push plate, the rubber plug corresponds to the through hole on the product to be tested, and is used to seal the through hole; one end of the elastic member abuts against the push plate, and the other end abuts against one end of the support rod provided with the rubber plug; The support rod is assembled in the through hole through a damping member. When the external force applied to the support rod is greater than a certain degree, relative movement can occur between the support rod and the push plate. The distance between the end of the rubber plug away from the push plate and the push plate is defined as H1, and the distance between the end of the push rod away from the push plate and the push plate is defined as H2, and H1 is greater than H2.

2. The airtightness test fixture according to claim 1, characterized in that: One end of the support rod away from the push plate is provided with a fixing position, and the rubber plug is at least partially accommodated in the fixing position.

3. The airtightness test fixture according to claim 1, characterized in that: A blocking member is further provided at one end of the support rod away from the push plate, and one end of the elastic member away from the push plate abuts against the blocking member.

4. The airtightness test fixture according to claim 1, characterized in that: The elasticity testing components are provided in plurality.

5. The airtightness test fixture according to claim 4, characterized in that: The support rods of different elastic test assemblies are fixedly connected to each other so that the support rods of different elastic test assemblies can move synchronously.

6. The airtightness test fixture according to claim 1, characterized in that: It also includes an ejector, which is at least partially accommodated in the groove and is used to eject the product to be tested out of the groove.

7. The airtightness test fixture according to claim 6, characterized in that: The ejection member includes a power member and an ejection mechanism, the power member is transmission-connected to the ejection mechanism, the ejection mechanism is arranged in the groove, and when the product to be tested is assembled at the opening of the groove, the ejection mechanism moves under the drive of the power member to eject the product to be tested, so that the product to be tested is detached from the placement seat.

8. The airtightness test fixture according to claim 1, characterized in that: It also includes a shell, the shell includes at least a top plate and a bottom plate, the top plate and the bottom plate are arranged opposite to each other and fixed to each other through a support rod or a support plate, the storage seat is arranged on the bottom plate, and the driver is arranged on the top plate; It also includes a guide rod, one end of which is fixedly connected to the push plate, and a through hole is provided on the top plate. The guide rod passes through the through hole, and when the driver drives the push plate to move, the guide rod is always partially accommodated in the through hole.

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