Fixing device for air tightness detection device

Abstract

The utility model relates to a fixing device for an air tightness detection device. The fixing device comprises a base, a control unit and a plurality of clamping and fixing units arranged on the base at intervals, the base comprises an operation table top, and each clamping and fixing unit comprises a workpiece positioning plate fixedly installed on the top face of the operation table top, a test piece lower template movably stacked on the workpiece positioning plate and used for bearing the bottom of a to-be-detected workpiece, and air cylinders vertically installed above the test piece lower template at intervals and used for jacking the to-be-detected workpiece from the upper portion. The air tightness detection device overcomes the defect that most existing air tightness detection devices cannot stably fix a detected workpiece due to the fact that a single-cylinder air cylinder is adopted to press the workpiece to be detected, and the workpiece to be detected (such as a lens and the like) is clamped through the up-and-down cooperation of the double-cylinder air cylinder, the pressing component and the test piece lower template. The device has the advantage of stably fixing the detected workpiece.

Description

Technical Field

[0001] This utility model relates to a fixing device for an airtightness testing device, which is applied in the production field of devices for fixing lenses or similar products on an airtightness testing device. Background Technology

[0002] Most current airtightness testing devices can only perform single-channel or multi-channel testing, failing to meet the need for simultaneous single-channel and multi-channel testing. The specific operating method for airtightness testing is as follows: Place a protective lower mold in the test area, place the workpiece to be tested (such as a lens) on the lower mold, and then place a corresponding protective upper mold on the lens. Press the operation button with one hand to transmit a signal to the control unit, which in turn controls the cylinder mounted on the airtightness testing device to press down, sequentially applying pressure to the support plate and the protective upper mold, clamping and fixing the lens. Then, perform single-channel or multi-channel airtightness testing. When the test is terminated, the cylinder will automatically return to its original position, completing one test cycle.

[0003] Currently, air tightness testing devices on the market have the following main drawbacks: 1. Most existing air tightness testing devices use a single-cylinder cylinder with a spherical structure at the outer end of the single-rod piston rod. This spherical structure clamps the lens by pressing against the support plate and the protective upper mold (i.e., ball positioning), which can easily cause the protective upper mold to tilt, resulting in the workpiece (such as the lens) to tilt, thus affecting the air tightness test results. It can also easily damage or render the cylinder and the solenoid valve of the control unit unusable; 2. The lens position cannot be quickly and easily adjusted after it tilts; 3. They can only test products through a single channel or multiple channels, which is time-consuming and inefficient (average test speed is 1 minute / piece); 4. Most lack independent safety warning functions, which can be dangerous if there is human error.

[0004] Therefore, it has become an urgent task to provide a fixing device for airtightness testing equipment that can stably fix the workpiece (such as a lens), quickly calibrate the lens position, combine single-channel and multi-channel detection, and also has an alarm function to prevent misoperation. Utility Model Content

[0005] To overcome the shortcomings of most existing airtightness testing devices, which cannot stably fix the workpiece due to the use of a single-cylinder air pressure on the workpiece, this utility model provides a fixing device for an airtightness testing device. By using a double-cylinder air pressure component and the upper and lower cooperation of the upper and lower template of the test piece to clamp the workpiece (such as a lens), it has the advantage of being able to stably fix the workpiece.

[0006] The technical solution of this utility model is as follows:

[0007] A fixing device for an airtightness testing apparatus includes a base, a control unit, and multiple clamping and fixing units spaced apart on the base. The base includes an operating table. Each clamping and fixing unit includes a workpiece positioning plate fixedly installed on the top surface of the operating table, a test piece lower template movably stacked on the workpiece positioning plate for supporting the bottom of the workpiece to be tested, and cylinders vertically spaced above the test piece lower template for pressing the workpiece to be tested from above. The fixing device for the airtightness testing apparatus also includes an air supply element connected to the cylinders of each clamping and fixing unit via air supply pipes for supplying air to the corresponding cylinders, and a solenoid valve provided on each air supply pipe for controlling the operation of the corresponding cylinder. The control unit includes a controller and a control signal input device connected to the controller. The controller is connected to the air supply element and each solenoid valve to control the operation of each solenoid valve and the air supply element according to the information input by the control signal input device.

[0008] The top surface of the workpiece positioning plate is provided with columnar protrusions or grooves, and the top surface of the test piece lower template is provided with grooves or protrusions of corresponding shapes and positions. The test piece lower template and the workpiece positioning plate are quickly positioned and snapped together through the cooperation of the protrusions and grooves. The cylinder is a double cylinder, and the two piston rods of each cylinder are vertically downward, and the lower ends of the two piston rods are connected and fixed with a pressing component for cooperating with the test piece lower template to press the workpiece to be tested.

[0009] The fixing device for the airtightness testing apparatus of this application employs a double-cylinder cylinder, along with a pressing component and the upper and lower cooperation of the test piece lower template to clamp the workpiece to be tested (such as a lens), which has the advantage of stably fixing the workpiece to be tested. Compared with the single-cylinder cylinders mostly used in existing airtightness testing apparatuses, whose single piston rod has a spherical structure at its outer end, this spherical structure can easily cause the protective upper mold to tilt when it clamps the lens by pressing the support plate and the protective upper mold in sequence (i.e., ball positioning), which in turn can cause the test piece (such as a lens) to tilt, thus affecting the airtightness test results. It can also easily lead to damage and scrapping of the cylinder and the solenoid valve of the control unit. In contrast, the double-cylinder cylinder of this application adopts planar positioning and double-rod operation. The outer ends of the two piston rods cooperate with the pressing component to ensure that the workpiece to be tested (such as a lens) does not tilt when clamped from above and below, and can also reduce the scrapping and damage of the solenoid valve and cylinder, making the test more stable. At the same time, the quick-positioning snap-fit ​​design between the test piece lower template and the workpiece positioning plate is not only convenient to use, but also convenient to maintain and clean. It is recommended to use four or more clamping and fixing units for easy operation and to ensure efficiency.

[0010] The top-pressing component includes a test connection transition plate, a test balance adjustment plate, and a test piece upper template stacked in parallel from top to bottom. The test connection transition plate is fixedly installed at the lower end of the cylinder piston rod and is parallel to the top surface of the operating table. The test balance adjustment plate is detachably connected to the test piece upper template. The top surface of the test balance adjustment plate has multiple connection holes spaced apart. The test connection transition plate has multiple through holes that pass through its top and bottom surfaces and correspond to the positions of the connection holes. The test connection transition plate and the test balance adjustment plate are movably connected together by screws that pass through the corresponding through holes and connection holes. The relative position between the test piece upper template and the test connection transition plate can be finely adjusted by adjusting the tightness of the screws.

[0011] The three-layer top-pressure component structure, consisting of a test connection transition plate, a test balance adjustment plate, and a template on the test piece, and their interconnections, allow for micro-positioning of the template, enabling quick and convenient adjustment of the fixed position of the clamped workpiece under test, thus achieving the tilt coaxial calibration function. Furthermore, the template is preferably made of polyoxymethylene (POM) material, which does not generate static electricity, while existing test piece templates are made of metal, which is prone to generating static electricity and thus affecting the test results.

[0012] The control signal input device includes multiple selection buttons corresponding to the solenoid valves of each clamping and fixing unit for selecting the operation of a cylinder of a certain clamping and fixing unit, an emergency stop button for stopping the operation of the air supply element, and two hands-protection operation buttons located on both sides of the emergency stop button, which can only start the operation of the air supply element when pressed simultaneously. The selection buttons, emergency stop button, and hands-protection operation buttons are all connected to the control unit.

[0013] First, select the desired clamping and fixing unit using the selection button. Then, simultaneously press the two hand-protection operation buttons located on either side of the emergency stop button to activate the selected clamping and fixing unit. In the event of unexpected situations such as damage to the workpiece under test, hand injury, or abnormal operation, pressing the emergency stop button will quickly interrupt the operation of the clamping and fixing unit. This design allows the fixing device for airtightness testing in this case to perform both single-channel and multi-channel testing, with short testing time, high efficiency, and long test stroke. It can operate independently or in combination without interference.

[0014] The selection button is an illuminated button.

[0015] The preferred selection button uses light indicators to make operation more intuitive and convenient.

[0016] The control signal input device is located on the base, and the clamping and fixing units are arranged horizontally at intervals. The fixing device for the airtightness detection device also includes an alarm element and a pair of safety light curtain sensors located on the outer sides of the two clamping and fixing units on the left and right sides, between the control signal input device and the clamping and fixing units. These sensors are used to sense whether a person has put their hand near the clamping and fixing unit and to trigger an alarm to prevent the person from being pinched. Both safety light curtain sensors and the alarm element are connected to the control unit, and the alarm element is installed on the base.

[0017] The safety light curtain sensor is designed to trigger an alarm whenever a hand is placed on the work surface between the two light curtains, which can more effectively remind the operator and prevent accidental hand injuries and danger.

[0018] Compared with the prior art, this utility model application has the following advantages:

[0019] 1) The fixing device for the airtightness testing device of this application has the advantage of being able to stably fix the workpiece to be tested by using a double-cylinder cylinder, and the upper and lower cooperation of the top pressing component and the lower template of the test piece to clamp the workpiece to be tested (such as a lens).

[0020] 2) The three-layer top-pressure component structure and its connection relationship, consisting of the test connection transition plate, the test balance adjustment plate and the template on the test piece, enable the template on the test piece to move slightly, thereby quickly and conveniently adjusting the fixed position of the clamped workpiece to be tested, that is, realizing the tilt coaxial calibration function.

[0021] 3) It has both single-channel and multi-channel detection capabilities, with short testing time, high efficiency, and long test stroke. It can operate independently or in combination without affecting each other. 4) The safety light curtain sensor, combined with the alarm element, greatly improves the safety of operation. Attached Figure Description

[0022] Figure 1 This is a perspective view of the fixing device for the airtightness testing device described in this utility model;

[0023] Figure 2 This is a front view of the fixing device for the airtightness testing device described in this utility model;

[0024] Figure 3 This is a cross-sectional view of the workpiece positioning plate and the lower template of the test piece in the stacked state of the fixing device for the airtightness testing device of this utility model. Figure 1 ;

[0025] Figure 4 This is a cross-sectional view of the workpiece positioning plate and the lower template of the test piece in the stacked state of the fixing device for the airtightness testing device of this utility model. Figure 2 .

[0026] Label Explanation:

[0027] 1. Base, 2. Workpiece positioning plate, 3. Test piece lower template, 4. Cylinder, 5. Air supply element, 6. Top pressing component, 7. Selection button, 8. Emergency stop button, 9. Two-handed operation button, 10. Safety light curtain sensor, 11. Protrusion, 12. Groove, 13. Solenoid valve, 6-1. Test connection transition plate, 6-2. Test balance adjustment plate, 6-3. Test piece upper template. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0029] like Figure 1-4 As shown, the present invention provides a fixing device for an airtightness testing device, comprising a base 1, a control unit, and multiple clamping and fixing units 2 spaced apart on the base 1. The base 1 includes an operating table. Each clamping and fixing unit 2 includes a workpiece positioning plate 2 fixedly installed on the top surface of the operating table, a test piece lower template 3 movably stacked on the workpiece positioning plate 2 for supporting the bottom of the workpiece to be tested, and cylinders 4 vertically spaced above the test piece lower template 3 for pressing the workpiece to be tested from above. The fixing device for the airtightness testing device also includes an air supply element 5 connected to each clamping and fixing unit 2's cylinder 4 via an air supply pipe for supplying air to the corresponding cylinder 4, and a solenoid valve 13 located on each air supply pipe for controlling the operation of the corresponding cylinder 4. The control unit is connected to a controller and a control signal input device connected to the controller. The controller is connected to the air supply element 5 and each solenoid valve 13 respectively, thereby controlling the operation of each solenoid valve 13 and the air supply element 5 according to the information input by the control signal input device.

[0030] The top surface of the workpiece positioning plate 2 is provided with a columnar protrusion 11 or a groove 12, and the top surface of the test piece lower template 3 is provided with a groove 12 or a protrusion 11 of corresponding shape and position. The test piece lower template 3 and the workpiece positioning plate 2 are quickly positioned and snapped together by the cooperation of the protrusion 11 and the groove 12. The cylinder 4 is a double cylinder 4, and the two piston rods of each cylinder 4 are vertically downward, and the lower ends of the two piston rods are connected and fixed with a pressing component 6 for cooperating with the test piece lower template 3 to press the workpiece to be tested.

[0031] The top-pressing component 6 includes a test connection transition plate 6-1, a test balance adjustment plate 6-2, and a test piece upper template 6-3 stacked in parallel from top to bottom. The test connection transition plate 6-1 is fixedly installed at the lower end of the piston rod of the cylinder 4 and is parallel to the top surface of the operating table. The test balance adjustment plate 6-2 is detachably connected to the test piece upper template 6-3. The top surface of the test balance adjustment plate 6-2 has multiple connection holes spaced apart. The test connection transition plate 6-1 has multiple through holes that pass through its top and bottom surfaces and correspond to the positions of the connection holes. The test connection transition plate 6-1 and the test balance adjustment plate 6-2 are movably connected together by screws that pass through the corresponding through holes and connection holes. The relative position between the test piece upper template 6-3 and the test connection transition plate 6-1 can be finely adjusted by adjusting the tightness of the screws.

[0032] The control signal input device includes multiple selection buttons 7 corresponding to the solenoid valves 13 of each clamping and fixing unit 2 for selecting the operation of a certain clamping and fixing unit 2 cylinder, an emergency stop button 8 for stopping the operation of the air supply element 5, and two hands-protection operation buttons 9 located on both sides of the emergency stop button 8 and which can only start the operation of the air supply element 5 when pressed simultaneously. The selection buttons 7, the emergency stop button 8, and the hands-protection operation buttons 9 are all connected to the control unit.

[0033] The selection button 7 is an illuminated button.

[0034] The control signal input device is located on the base 1. The clamping and fixing units 2 are arranged horizontally in sequence. The fixing device for the airtightness detection device also includes an alarm element and a pair of safety light curtain sensors 10 located on the outer side of the two clamping and fixing units 2 on the left and right sides and between the control signal input device and the clamping and fixing units 2. These sensors are used to sense whether a person has put their hand near the clamping and fixing units 2 and to trigger an alarm to prevent the person from being pinched. The two safety light curtain sensors 10 and the alarm element are all connected to the control unit. The alarm element is installed on the base 1.

Claims

1. A fixing device for an airtightness testing device, characterized in that: The device includes a base (1), a control unit, and multiple clamping and fixing units spaced apart on the base (1). The base (1) includes an operating table. Each clamping and fixing unit includes a workpiece positioning plate (2) fixedly installed on the top surface of the operating table, a test piece lower template (3) movably stacked on the workpiece positioning plate (2) to support the bottom of the workpiece to be tested, and cylinders (4) vertically spaced above the test piece lower template (3) to press the workpiece to be tested from above. The fixing device for the airtightness testing device also includes an air supply element (5) connected to the cylinders (4) of each clamping and fixing unit through an air supply pipe to supply air to the corresponding cylinders (4), and a solenoid valve (13) provided on each air supply pipe to control the operation of the corresponding cylinders (4). The control unit is connected to a controller and a control signal input device connected to the controller. The controller is connected to the air supply element (5) and each solenoid valve (13) to control the operation of each solenoid valve (13) and the air supply element (5) according to the information input by the control signal input device. The top surface of the workpiece positioning plate (2) is provided with a columnar protrusion (11) or a groove (12), and the top surface of the test piece lower template (3) is provided with a groove (12) or a protrusion (11) of the corresponding shape and position. The test piece lower template (3) and the workpiece positioning plate (2) are quickly positioned and snapped together by the cooperation of the protrusion (11) and the groove (12). The cylinder (4) is a double cylinder (4). The two piston rods of each cylinder (4) are vertically downward, and the lower ends of the two piston rods are connected and fixed with a top pressing component (6) for cooperating with the test piece lower template (3) to press the workpiece to be tested.

2. The fixing device for an airtightness testing device according to claim 1, characterized in that: The top-pressing component (6) includes a test connection transition plate (6-1), a test balance adjustment plate (6-2), and a test piece upper template (6-3) stacked in parallel from top to bottom. The test connection transition plate (6-1) is fixedly installed at the lower end of the piston rod of the cylinder (4) and is parallel to the top surface of the operating table. The test balance adjustment plate (6-2) and the test piece upper template (6-3) are detachably connected. The top surface of the test balance adjustment plate (6-2) is provided with multiple connection holes spaced apart. The test connection transition plate (6-1) is provided with multiple through holes that pass through its top and bottom surfaces and are corresponding to the positions of the connection holes. The test connection transition plate (6-1) and the test balance adjustment plate (6-2) are movably connected together by screws that pass through the corresponding through holes and connection holes in sequence. The relative position between the test piece upper template (6-3) and the test connection transition plate (6-1) can be finely adjusted by adjusting the tightness of the screws.

3. The fixing device for an airtightness testing device according to claim 1, characterized in that: The control signal input device includes multiple selection buttons (7) corresponding to the solenoid valves (13) of each clamping and fixing unit for selecting the operation of a certain clamping and fixing unit cylinder, an emergency stop button (8) for stopping the operation of the air supply element (5), and two hands-protection operation buttons (9) located on both sides of the emergency stop button (8) and which can only start the operation of the air supply element (5) when pressed simultaneously. The selection buttons (7), emergency stop button (8), and hands-protection operation buttons (9) are all connected to the control unit.

4. The fixing device for an airtightness testing device according to claim 3, characterized in that: The selection button (7) is an illuminated button.

5. The fixing device for an airtightness testing device according to claim 3, characterized in that: The control signal input device is located on the base (1). Each clamping and fixing unit is arranged horizontally in sequence. The fixing device for the airtightness detection device also includes an alarm element and a pair of safety light curtain sensors (10) located on the outer side of the two clamping and fixing units on the left and right sides and between the control signal input device and the clamping and fixing unit. These sensors are used to sense whether a person has put their hand near the clamping and fixing unit and to alarm the person to prevent them from being pinched. The two safety light curtain sensors (10) and the alarm element are all connected to the control unit. The alarm element is installed on the base (1).

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