Universal airtightness detection tool

Abstract

The utility model discloses a general airtightness detection tool, comprising a pedestal, a support assembly arranged on the pedestal, a bottom plate arranged above the support assembly, a pressing cylinder assembly arranged on the pedestal, the pressing cylinder assembly being distributed on four sides of the pedestal, the support assembly being located on the inner side of the pressing cylinder assembly, and the bottom plate being located on the inner side of the pressing cylinder assembly. The base is provided with a pressing air cylinder assembly, the pressing air cylinder assembly is used for pressing the edge of the upper cover of the battery box to be tested, the edge of the base is provided with a pressing strip assembly, the upper portion of the pressing strip assembly is located above the upper cover of the battery box to be tested, and the bottom plate is further provided with an air inlet assembly. The air cylinder pressing mechanism has the advantages that the air cylinder pressing mechanism has a flexible adjusting and pressing function; each product corresponds to one rubber mat and one rubber strip, and when the products are switched, the rubber mats can be switched; the air inlet assembly is reliable in sealing and convenient to disassemble; the pressing strip assembly has a flexible function; the jig is universal, the jig development number is reduced, the production site is saved, and the development, manufacturing and management cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of manufacturing battery boxes for new energy electric vehicles, and in particular to a universal airtightness detection fixture. Background Art

[0002] The power stamping electric box of new energy vehicles has very high requirements for the sealing of the lower box and the upper cover. Most of the airtightness test processes for stamping electric boxes are tested separately for the lower box and the upper cover. The current testing process is to place the product in a special airtightness test tooling, connect the airtightness detection equipment, fill the volume of the product to be tested with compressed air of a certain pressure, and then maintain the pressure. The pressure difference method or flow method is used to test whether there is gas leakage in the product, and the airtightness of the product is judged according to the amount of leakage.

[0003] At present, many new energy pure electric vehicle power battery covers are formed by sheet metal stamping, with a rectangular shape, a length dimension of 2000mm~2200mm, and a width dimension of 1200mm~1500mm. If a dedicated airtightness detection tool is developed for each cover, not only will the manufacturing cost of the cover increase, but it will also greatly occupy the working area of ​​the production workshop, and the management cost will also increase significantly. Therefore, a universal airtightness detection fixture for the cover is provided, which can complete the airtightness test of the cover products with a length and width difference of no more than 300mm and similar shapes, reduce the number of fixtures developed, save production space, and reduce development, manufacturing and management costs. Summary of the invention

[0004] In order to solve the above technical problems, the utility model provides a universal airtight detection fixture which reduces the development, manufacturing and management costs.

[0005] The technical scheme is as follows: a universal airtight detection fixture, the main points of which are that it includes a base, a support assembly is arranged on the base, a bottom plate is installed above the support assembly, a clamping cylinder assembly is also arranged on the base, the clamping cylinder assembly is distributed on the four sides of the base, the support assembly is located on the inner side of the clamping cylinder assembly, the clamping cylinder assembly is used to clamp the edge of the upper cover of the battery box to be tested, a pressure strip assembly is installed at the edge of the base, the upper part of the pressure strip assembly is located above the upper cover of the battery box to be tested, and an air intake assembly is also provided on the bottom plate. With the above structure, the clamping cylinder assembly is clamped on the edge of the upper cover of the battery box, and is composed of 2 groups of fixed cylinders and 3 groups of movable cylinders. It has a flexible adjustment and clamping function, and is suitable for a variety of different types of battery box upper covers. The air intake assembly cooperates with the pressure strip assembly, rubber pad, and rubber strip, and the sealing is reliable and easy to disassemble. The detection fixture can be universal, and there is no need to develop a fixture for each product separately, which reduces the number of fixture development, saves production space, and reduces development, manufacturing and management costs.

[0006] Preferably, the clamping cylinder assembly includes a fixed cylinder and a movable cylinder, and the fixed cylinder and the movable cylinder are respectively in two groups and three groups. The fixed cylinder and the movable cylinder are respectively arranged on the opposite sides of the base, and the two groups of movable cylinders are located on the same side; the upper part of all clamping cylinder assemblies is connected to a clamping head. With the above structure, the fixed cylinder and the movable cylinder cooperate with each other, the fixed cylinder does not move, and the movable cylinder is adjusted according to the shape of the different battery box covers to meet the needs of different types, so that the universality of the detection fixture can be achieved.

[0007] As a preference: a moving assembly is provided at the bottom of all the movable cylinders, the moving assembly has a slide rail and a slide plate, the slide rail is fixed on the base, and the slide plate is mounted on the slide rail. With the above structure, the movable cylinder is mounted on the moving assembly, and the moving assembly drives the movable cylinder to move, pushing the movable cylinder to press different types of products to be tested.

[0008] As a preference: the pressure strip assembly includes a mounting seat and a pressure strip arranged above the mounting seat, the mounting seats are respectively located on opposite sides of the base, the mounting seat on one side is arranged at the edge of the base, and the mounting seat on the other side is flush with the fixed cylinder position. With the above structure, the upper end is in close contact with the upper surface of the product to be tested, and the Z direction is adjustable, and the installation position can be adjusted according to the product to be tested.

[0009] Preferably, a rubber pad is laid on the bottom plate, and a through hole is opened on the rubber pad corresponding to the air intake component, and the air intake component can pass through the rubber pad through the through hole. With the above structure, the rubber pad can correspond to different types of products one by one, and can achieve the purpose of rapid replacement. At the same time, the air intake component passes through the rubber pad to ensure its sealing.

[0010] As a preference: a rubber strip is attached to the surface of the rubber pad, and the shape of the rubber strip is arranged along the flange edge of the battery box upper cover. The above structure further improves the sealing performance, can achieve one-to-one correspondence with different types of products, and can achieve rapid replacement.

[0011] Preferably, the support assembly includes a plurality of support columns, the number of which is nine, all of which are of equal height, and the support assembly is welded to the base. With the above structure, multiple support columns can ensure the stability of the airtightness detection above, and the equal height setting of the support columns ensures that the bottom plate is at the same horizontal height. The support assembly can be firmly connected to the base bracket by being installed on the base by welding.

[0012] Preferably, the base includes a reference plate, and an air path component and a centralized control component are arranged at one of the wide sides of the reference plate, and the air path component and the centralized control component are located at the wide side where the fixed cylinder is located. The above structure can realize effective control of the air intake component and other components on the detection fixture.

[0013] Preferably, lifting rings are provided at the four corners of the reference plate, and weight-reducing avoidance holes are provided below the lifting rings. All the weight-reducing avoidance holes are located at both ends of the long side of the reference plate, and casters are also provided below the reference plate. With the above structure, the lifting rings facilitate lifting the detection fixture, and the casters facilitate movement, reducing manpower handling.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the cylinder pressure head is pressed on the flange edge of the product to be tested, and is composed of 2 groups of fixed cylinders and 3 groups of movable cylinders, with a flexible adjustment and clamping function; each product corresponds to 1 rubber pad and 1 rubber strip, and the rubber strip is pasted on the rubber pad, and when the product is switched, the rubber pad can be switched; the air intake component is reliably sealed and easy to disassemble; the filler can be universal; the pressure strip component has a flexible function; the fixture can be universal, and there is no need to develop a fixture for each product separately, which reduces the number of fixture development, saves production space, and reduces development, manufacturing and management costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure with a battery box upper cover;

[0017] Figure 3 for Figure 1 A top view of

[0018] Figure 4 It is a schematic diagram of the structure of the compression cylinder assembly;

[0019] Figure 5 Schematic diagram of the base and support assembly structure. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with embodiments and drawings.

[0021] like Figure 1 to Figure 2As shown, a universal airtight detection fixture mainly includes a base 1, a support assembly 2 is arranged on the base 1, a bottom plate 3 is installed above the support assembly 2, a clamping cylinder assembly 4 is also arranged on the base 1, the clamping cylinder assembly 4 is distributed on the four sides of the base 1, the support assembly 2 is located on the inner side of the clamping cylinder assembly 4, the clamping cylinder assembly 4 is used to clamp the edge of the upper cover of the battery box to be tested, a pressure strip assembly 5 is installed at the edge of the base 1, the upper part of the pressure strip assembly 5 is located above the upper cover of the battery box to be tested, and an air intake assembly 6 is also opened on the bottom plate 3, and the gas enters the bottom plate 3 and the upper cover of the battery box to be tested from the air intake assembly 6, so as to perform airtightness detection on the upper cover of the battery box to be tested.

[0022] like Figure 3 As shown, a rubber pad 8 is laid on the bottom plate 3, and a through hole is opened in the rubber pad 8 corresponding to the air intake component 6. The air intake component 6 can pass through the rubber pad 8 through the through hole. The material of the rubber pad 8 is rubber, with a thickness of 10mm, and a Ф18mm hole is cut for the air intake component 6 to pass through. The rubber pad 8 corresponds to the upper cover of the battery box to be tested one by one and can be quickly replaced.

[0023] A rubber strip 9 is pasted on the surface of the rubber pad 8. The shape of the rubber strip 9 is arranged along the flange edge line of the battery box cover. The material of the rubber strip 9 is foam silicone, and it is pasted on the surface of the rubber pad 8 with double-sided tape. The cross-sectional shape is rectangular, the width is 30mm, and the height is 6mm-8mm. The rubber strip 9 corresponds one-to-one to the battery box cover to be tested.

[0024] A plurality of filling blocks 10 are arranged on the rubber pad 8. The filling blocks 10 are made of aluminum alloy plate with a thickness of 5 mm. A plurality of filling blocks 10 can be selected according to different products to ensure that the filling volume reaches 80% to 90% of the volume to be tested, so that the gas introduced by the air intake assembly 6 can quickly fill the upper cover of the battery box to be tested, saving time, saving gas, and effectively reducing costs.

[0025] like Figure 4 As shown, the clamping cylinder assembly 4 includes a fixed cylinder 401 and a movable cylinder 402, and the fixed cylinder 401 and the movable cylinder 402 are respectively divided into two groups and three groups. The fixed cylinder 401 and the movable cylinder 402 are respectively arranged on the opposite sides of the base 1, wherein the two groups of the movable cylinder 402 are located on the same side; the upper parts of all the clamping cylinder assemblies 4 are connected with clamping heads 403, and all the clamping heads 403 are used to clamp the edges of the upper cover 5 of the battery box to be tested.

[0026] A moving assembly 7 is provided at the bottom of all the movable cylinders 402. The moving assembly 7 includes a slide rail 701 and a slide plate 702. The slide rail 701 is fixed on the base 1, and the slide plate 702 is installed on the slide rail 701. The moving assembly 7 can drive the movable cylinder 402 to move, so as to be adjusted according to the different shapes and sizes of the upper cover of the battery box to be tested, thereby ensuring that all cylinders can press the edge of the upper cover of the battery box to be tested, and realizing the universal use of the fixture.

[0027] The pressure strip assembly 5 includes a mounting seat 501 and a pressure strip 502 arranged above the mounting seat 501, and the mounting seats 501 are respectively located on opposite sides of the base 1. The mounting seat 501 on one side is arranged at the edge of the base 1, and the mounting seat 501 on the other side is flush with the fixed cylinder 401. The pressure strip 502 is in contact with the upper surface of the upper cover of the battery box to be tested, and is adjustable in the Z direction, and the installation position can be adjusted according to the upper cover of the battery box to be tested.

[0028] like Figure 5 As shown, the support assembly 2 includes a plurality of support columns 201, the number of the support columns 201 is nine, all the support columns 201 are of the same height, and the support assembly 2 is welded to the base 1 by MAG. The support assembly 2 includes a plurality of support columns 201, the number of the support columns 201 is nine, and every three columns form a vertical group, all the support columns 201 are of the same height, and the support assembly 2 is welded to the base 1 by MAG.

[0029] The base 1 includes a reference plate 101, and an air circuit component 103 and a centralized control component 14 are arranged at one of the wide sides of the reference plate 101. The air circuit component 103 and the centralized control component 104 are located at the wide side where the fixed cylinder 401 is located, which can realize effective control of the air tightness detection of the fixture.

[0030] Two hollow positions are provided on the reference plate 101, and the hollow positions are respectively located between the vertical groups. Lifting rings 102 are provided at the four corners of the reference plate 101, and weight reduction avoidance holes 106 are provided below the lifting rings 102. All the weight reduction avoidance holes 106 are located at both ends of the long sides of the reference plate 101. Casters 105 are also provided below the reference plate 101.

[0031] The battery box cover to be tested can be installed on the base plate 3, the size of the base plate 3 is designed according to the largest size of the battery box cover to be tested, and the clamping cylinder assemblies 4 arranged around are adjusted according to the shapes of different battery box covers to be tested to adjust the positions of the clamping cylinder assemblies 4 so that all the clamping cylinder assemblies 4 can clamp the battery box cover to be tested. At the same time, a filling block is also arranged on the base plate 3, and the filling block reaches 80%~90% of the volume to be tested. The gas enters between the base plate 3 and the battery box cover to be tested from the air intake assembly 6, and the battery box cover to be tested is tightly fitted to the base plate 3 to avoid air leakage from all sides, resulting in inaccurate airtightness detection. The setting of the filling block can make the gas quickly fill the volume to be tested, thereby saving gas and time. The pressure strip assembly 6 is arranged to be close to the upper surface of the battery box cover to be tested, and is adjustable in the Z direction, and the installation position can be adjusted according to the battery box cover to be tested.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A universal airtightness detection fixture, characterized in that: The invention comprises a base (1), a support assembly (2) is arranged on the base (1), a bottom plate (3) is installed above the support assembly (2), a pressing cylinder assembly (4) is also arranged on the base (1), the pressing cylinder assembly (4) is distributed on the four sides of the base (1), the support assembly (2) is located on the inner side of the pressing cylinder assembly (4), the pressing cylinder assembly (4) is used to press the edge of the upper cover of the battery box to be tested, a pressure strip assembly (5) is installed at the edge of the base (1), the upper part of the pressure strip assembly (5) is located above the upper cover of the battery box to be tested, and an air intake assembly (6) is also provided on the bottom plate (3); The clamping cylinder assembly (4) comprises a fixed cylinder (401) and a movable cylinder (402), wherein the fixed cylinder (401) and the movable cylinder (402) are respectively provided in two groups and three groups, and the fixed cylinder (401) and the movable cylinder (402) are respectively provided on opposite sides of the base (1), wherein the two groups of the movable cylinder (402) are located on the same side; and the upper parts of all the clamping cylinder assemblies (4) are connected to a clamping head (403).

2. A universal airtightness detection fixture according to claim 1, characterized in that: A moving assembly (7) is arranged at the bottom of all the movable cylinders (402), wherein the moving assembly (7) comprises a slide rail (701) and a slide plate (702), wherein the slide rail (701) is fixed on the base (1), and the slide plate (702) is mounted on the slide rail (701).

3. A universal airtightness detection fixture according to claim 1, characterized in that: The pressure strip assembly (5) comprises a mounting seat (501) and a pressure strip (502) arranged above the mounting seat (501), wherein the mounting seats (501) are respectively located on opposite sides of the base (1), the mounting seat (501) on one side is arranged at the edge of the base (1), and the mounting seat (501) on the other side is flush with the fixed cylinder (401).

4. A universal airtightness detection fixture according to claim 1, characterized in that: A rubber pad (8) is laid on the bottom plate (3), and a through hole is opened in the rubber pad (8) corresponding to the air intake component (6), so that the air intake component (6) can pass through the rubber pad (8) through the through hole.

5. A universal airtightness detection fixture according to claim 4, characterized in that: A rubber strip (9) is adhered to the surface of the rubber pad (8), and the outer shape of the rubber strip (9) is arranged along the flange edge line of the upper cover of the battery box to be tested.

6. A universal airtightness detection fixture according to claim 1, characterized in that: The support assembly (2) comprises a plurality of support columns (201), the number of the support columns (201) being nine, all the support columns (201) being of the same height, and the support assembly (2) being welded on the base (1).

7. A universal airtightness detection fixture according to claim 1, characterized in that: The base (1) comprises a reference plate (101), and an air path component (103) and a centralized control component (104) are arranged at one of the wide sides of the reference plate (101), and the air path component (103) and the centralized control component (104) are located at the wide side where the fixed cylinder (401) is located.

8. A universal airtightness detection fixture according to claim 7, characterized in that: Lifting rings (102) are provided at the four corners of the reference plate (101), and weight-reducing avoidance holes (106) are provided below the lifting rings (102). All the weight-reducing avoidance holes (106) are located at both ends of the long side of the reference plate (101), and casters (105) are also provided below the reference plate (101).

Images