Airtight test tool

Abstract

The embodiment of the present application discloses an airtight test fixture, which is used to clamp a workpiece when performing an airtight test on the workpiece. The airtight test fixture of the embodiment of the present application includes: the fixed seat is fixedly connected to the cylinder, the fixed seat is provided with a first air hole for supplying air to the workpiece, the fixed seat is provided with a second air hole for connecting to an external air source, and the first air hole is connected to the second air hole; the clip is installed on the fixed seat; the cylinder is installed on the base plate, the cylinder includes a cylinder body and a piston rod, the cylinder body is connected to an external air source, and the piston rod is used to drive the clip, so that when the air pressure of the cylinder increases, the clip clamps the workpiece on the first air hole.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of mechanical processing, and specifically to an airtight testing tool. Background Art

[0002] Airtightness test is a common test in industrial production, mainly used to test whether the workpiece is well sealed. The usual test method is to spray soapy water or other foaming liquid on the surface of the workpiece, and then inflate the workpiece to produce bubbles in the part of the workpiece with poor airtightness. Workers can observe the location of the bubbles and infer the location of the workpiece with poor airtightness.

[0003] Before inflating the workpiece, you need to align the workpiece with the air hole and fill the workpiece with air through the air hole. In order to avoid air leakage due to the insufficient fit between the workpiece and the air hole during inflation, the workpiece should be fixed on the air hole as firmly as possible. A common method of fixing the workpiece is to set screw holes around the air hole. During each airtightness test, the workpiece is screwed to the air hole with screws. After the test is completed, the screws are removed and then the workpiece is removed.

[0004] In the current airtightness testing process, the procedure for threaded fixing of workpieces is rather cumbersome, which consumes too much of the workers' time and energy, affecting production efficiency. Summary of the invention

[0005] An embodiment of the present application provides an airtight testing tool for fixing a workpiece on an air hole when testing the airtightness of the workpiece.

[0006] The airtight test tool provided in the embodiment of the present application includes: a base plate, a fixing seat, a cylinder and a buckle;

[0007] The fixing seat is fixedly connected to the cylinder, the fixing seat is provided with a first air hole for supplying air to the workpiece, the fixing seat is provided with a second air hole for connecting to an external air source, and the first air hole is communicated with the second air hole;

[0008] The clip is mounted on the fixing seat; the cylinder is mounted on the base plate, the cylinder comprises a cylinder body and a piston rod, the cylinder body is connected to an external air source, and the piston rod is used to drive the clip, so that when the air pressure in the cylinder increases, the clip clamps the workpiece on the first air hole.

[0009] Preferably, the buckle comprises: a clamping portion, a buckle body, a first hook portion and a second hook portion;

[0010] The clamping portion and the first hook portion are respectively arranged on both sides of the buckle body, and the top of the piston rod abuts against the first hook portion of the buckle;

[0011] The second hook portion is disposed at the lower end of the buckle body and is arranged on the same side of the buckle as the first hook portion;

[0012] A through hole is provided in the middle of the piston rod, and the second hook passes through the through hole;

[0013] The lower end of the buckle body is fixed to the fixing seat via a rotating shaft, so that when the piston rod moves, it can drive the buckle to rotate around the rotating shaft.

[0014] Preferably, the movement direction of the piston rod is perpendicular to the horizontal plane.

[0015] Preferably, the cylinder body is communicated with the second air hole.

[0016] Preferably, a buffer portion made of elastic material is provided on the clamping portion.

[0017] Preferably, positioning pins are provided around the first air hole for positioning the product to be tested.

[0018] Preferably, the first air hole is circular, and two positioning pins are provided along the diameter direction of the first air hole, and the two positioning pins are distributed on both sides of the first air hole.

[0019] Preferably, anti-slip pads of preset height are provided at the four bottom corners of the bottom plate.

[0020] Preferably, the fixing seat is provided with a plurality of first air holes for performing airtightness tests on a plurality of workpieces.

[0021] Preferably, the cylinder is fixed to the base plate via a threaded connection, and the fixing seat is fixedly mounted on the cylinder via a threaded connection.

[0022] It can be seen from the above technical solution that the embodiment of the present application has the following advantages: a special pneumatic clamp is provided on the airtight testing device, and the pneumatic clamp can be controlled to clamp or loosen the workpiece, thereby avoiding the cumbersome steps of threaded fixing of the workpiece and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram provided for an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a buckle provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of the cylinder and the fastener provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] An embodiment of the present application provides an airtight testing tool for fixing a workpiece on a fixing seat when testing the airtightness of the workpiece.

[0027] The traditional airtightness test fixture is to align the workpiece with the air hole before the airtightness test, fix the workpiece on the air hole through threaded connection, and then start the airtightness test. After the test is completed, the screws connecting the workpiece and the fixing seat need to be removed before the workpiece can be removed. The process is relatively cumbersome, especially when installing the workpiece through threaded connection, which will consume a lot of time for the operator to install and remove multiple screws.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1 An embodiment of the airtight test tool provided in the present application includes: a base plate 10, a fixing seat 20, a cylinder 30 and a fastener 40.

[0030] Among them, four cylinders 30 are fixedly mounted on the bottom plate 10, each cylinder 30 is provided with a threaded hole, and the fixing seat 20 is fixedly mounted on the cylinder 30 through the threaded hole. Part of the free space is left on the bottom plate 10, which can be used to place the air tightness test device.

[0031] The fixing seat 20 is provided with two first air holes 201 for supplying air to the workpiece, and a second air hole 202 connected to an external air source, and the first air hole 201 and the second air hole 202 are connected inside the fixing seat; the fixing seat 20 is provided with four grooves 203, and a clip 40 is installed in each groove 203. Each cylinder 30 includes a cylinder body 301 and a piston rod 302, wherein the cylinder body 301 is connected to an external air source, and the manipulation of the external air source can drive the piston rod 302 of the cylinder 30 to extend and retract.

[0032] The piston rod 302 can drive the clip 40 to clamp or release the workpiece. When in use, place the two workpieces at each of the first air holes. When the air pressure in the cylinder 30 increases, the piston rod 302 extends, pushing the clip 40 to rotate a certain angle around the rotating shaft. During the rotation, the clip 40 contacts the workpiece and fixes the workpiece on the fixed seat 20. At the same time, the clip 40 stops moving and the piston rod 302 no longer extends. At this time, the workpiece and the first air hole 201 fit tightly, and there will be no gap for air leakage between the workpiece and the first air hole 201, ensuring that the airtightness test operation can be carried out normally.

[0033] In this embodiment, in order to enable the workpiece to be quickly and accurately aligned with the first air hole 201 during the airtight test, a positioning pin 203 is provided on each side of each first air hole 201. Before the airtight test, the workpiece to be tested can be placed by aligning it with the positioning pins. After the workpiece and the positioning pins 203 are completely fitted, the air cylinder air source is controlled to pressurize, and the air cylinder 30 is used to drive the buckle 40 to fix the workpiece.

[0034] In this embodiment, the buckle 40 is generally in a "T" shape as a whole. Please refer to Figure 2 , a specific buckle 40 may include: a clamping part 401, a buckle main body 402, a first hook part 403 and a second hook part 404; wherein the clamping part 401 and the first hook part 403 are respectively arranged on both sides of the upper end of the buckle main body, forming the upper part of the "T", and the second hook part 404 is located at the lower end of the buckle 40, which can be analogous to the hook-shaped structure below the "T". The lower end of the buckle 40 is also fixed on the air cylinder 30 through a rotating shaft.

[0035] Please refer to Figure 3 , an air cylinder 30 includes a cylinder body 301 and a piston rod 302. When the piston rod 302 extends, the piston rod against the lower part of the first hook part 403 will push the buckle 40 to rotate around the fixed rotating shaft, and then the clamping part 401 of the buckle 40 contacts the workpiece, and the workpiece is buckled at the measured position of the first air hole 201. A through hole is also provided in the middle of the piston rod 302, and the second hook part 404 passes through the through hole on the piston rod 302, so that when the piston rod 302 retracts, the second hook part 404 is pressed down, driving the buckle 40 to release the workpiece clamped by the clamping part 401.

[0036] It should be noted that the above embodiment is only one embodiment of the present application. In actual use, the buckle 40 can also be of other shapes, as long as the buckle 40 can stably clamp the workpiece on the first air hole 201. Other numbers of positioning pins 203 can also be provided around each first air hole 201, and the layout of the positioning pins 203 can also be designed as other layouts according to the shape of the part. For example, taking the first air hole as the center, 3 equally spaced positioning pins are arranged clockwise to facilitate the accurate positioning of the workpiece by the worker during operation.

[0037] In some specific embodiments, the moving direction of the piston rod 302 during expansion and contraction is perpendicular to the horizontal plane.

[0038] In some specific embodiments, the cylinder body 301 is connected to the second air hole 202, and the cylinder 30 and the workpiece to be tested are connected to the same external air source. By using the same external air source, the piston rod 302 can automatically drive the clamp 40 to clamp the workpiece to be tested while the high-pressure gas is passed into the workpiece to be tested, and there is no need to perform unnecessary operations to control the clamp 40. After the airtightness test is completed, the external air source no longer supplies air, the pressure of the cylinder 30 drops to a lower level, and the clamp 40 automatically releases the clamped workpiece. In addition, the airtightness test device for the cylinder 30 and the workpiece uses one air source, which can make full use of the air source for the airtightness test, and there is no need to equip the cylinder 30 with other controllable air sources, further reducing the cost of the airtightness test.

[0039] In some specific embodiments, in order to prevent the fastener 40 from damaging the workpiece when clamping, the clamping portion 401 in contact with the workpiece is also provided with a buffer portion made of rubber or other elastic material. When the cylinder drives the fastener 40 to rotate, the fastener 40 contacts the workpiece through the buffer portion, fixing the workpiece on the first air hole 201 of the fixing seat 20.

[0040] In some specific embodiments, anti-skid pads 101 of preset height are provided at the four corners of the bottom of the base plate, which can not only prevent slipping, but also raise the base plate 10, making it easier for a forklift to extend the forks from under the base plate 10 during transportation, thereby improving transportation efficiency.

[0041] In some specific implementations, the number of the first air holes 201 on the fixing base may be one or more. If multiple first air holes 201 are provided, a workpiece that needs to be airtightly tested may be arranged on each first air hole 201. In one airtight test, multiple workpieces may be airtightly tested at the same time, which greatly improves the efficiency of the airtight test.

[0042] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An airtight test tool, characterized in that: include: Base plate, fixing seat, cylinder and buckle; The fixing seat is fixedly connected to the cylinder, the fixing seat is provided with a first air hole for supplying air to the workpiece, the fixing seat is provided with a second air hole for connecting to an external air source, and the first air hole is communicated with the second air hole; The clip is mounted on the fixing seat; the cylinder is mounted on the bottom plate, the cylinder comprises a cylinder body and a piston rod, the cylinder body is connected to an external air source, the movement direction of the piston rod is perpendicular to the horizontal plane, and the piston rod is used to drive the clip, so that when the air pressure of the cylinder increases, the clip clamps the workpiece on the first air hole; The buckle comprises: a clamping portion, a buckle body, a first hook portion and a second hook portion; The clamping portion and the first hook portion are respectively arranged on both sides of the buckle body, and the top of the piston rod abuts against the first hook portion of the buckle; the second hook portion is arranged at the lower end of the buckle body and is arranged on the same side of the buckle as the first hook portion; a through hole is provided in the middle of the piston rod, and the second hook portion passes through the through hole; The lower end of the buckle body is fixed to the fixing seat via a rotating shaft, so that when the piston rod moves, it can drive the buckle to rotate around the rotating shaft.

2. The airtight test tool according to claim 1, characterized in that: The cylinder is communicated with the second air hole.

3. The airtight test tool according to claim 1, characterized in that: The clamping part is provided with a buffer part made of elastic material.

4. The airtight test tool according to claim 1, characterized in that: Positioning pins are arranged around the first air hole to position the product under test.

5. The airtight test tool according to claim 4, characterized in that: The first air hole is circular, and two positioning pins are provided along the diameter direction of the first air hole, and the two positioning pins are distributed on both sides of the first air hole.

6. The airtight test tool according to claim 1, characterized in that: The four corners of the bottom of the base plate are also provided with anti-skid pads of preset heights.

7. The airtight test tool according to claim 1, characterized in that: The fixing seat is provided with a plurality of first air holes for performing airtightness tests on a plurality of workpieces.

8. The airtight test tool according to claim 1, characterized in that: The cylinder is fixed to the base plate through a threaded connection, and the fixing seat is fixedly installed on the cylinder through a threaded connection.

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