Nitrogen spring finished product detection equipment and use method thereof

Abstract

The invention discloses nitrogen spring finished product detection equipment and a use method thereof, and the equipment comprises a bottom frame which is provided with a protection frame; the pressure detection mechanism is located in the protection frame and installed on the bottom frame; the bearing mechanism can be used for placing a nitrogen spring finished product and is mounted on the bottom frame; the gas leakage detection mechanism is used for spraying detection liquid to the nitrogen spring finished product; the electric control system is used for system control; the pressure detection mechanism is used for detecting nitrogen spring finished products placed on the bearing mechanism. According to the nitrogen spring finished product detection equipment, the servo press is matched with the pressure sensor and the pressure monitor to detect a nitrogen spring finished product, and a pressure monitoring curve is output while the pressure is detected; an alcohol spraying structure is arranged for detecting whether the nitrogen spring leaks gas; and the equipment is compatible with nitrogen springs with multiple diameters, multiple heights and different specifications for full-automatic one-stop detection, and is safe and reliable.

Description

Technical Field

[0001] This invention belongs to the technical field of equipment for testing finished nitrogen springs, specifically relating to a testing device for finished nitrogen springs and its usage method. Background Technology

[0002] Nitrogen springs are a new type of elastic component that uses high-pressure nitrogen as the working medium. They are small in size, have high elastic force, long stroke, stable operation, are precisely manufactured, have a long service life (one million cycles), a smooth elastic force curve, and do not require pre-tensioning. They can perform tasks that are difficult for conventional elastic components such as metal springs, rubber, and air cushions to accomplish, simplifying mold design and manufacturing, facilitating mold installation and adjustment, extending mold service life, and ensuring stable product quality. They can also be designed as a nitrogen spring system to work as part of the mold, and can easily achieve constant pressure and delayed action within the system. They are a new generation of ideal elastic components with flexible properties.

[0003] During the production of nitrogen springs, testing equipment is required for factory inspection to check the airtightness, yield height, and spring force of the nitrogen springs, ensuring the pass rate. The pressure test of nitrogen springs is measured by a pressure sensor. The specific steps are as follows: the nitrogen spring is pressed down through a pressure sensor and a pressure device. During the process, the compression signal is transmitted to the pressure sensor to measure the initial spring force, and the spring force is measured by continuing to press down.

[0004] Existing testing equipment uses hydraulic pressure sensors, which requires manual operation and is somewhat dangerous. It can only determine whether the pressure meets the standard, and its testing function is limited. Moreover, the above testing method usually requires multiple pressing operations to obtain accurate data on the nitrogen spring. Summary of the Invention

[0005] To address the aforementioned problems in existing technologies, this invention discloses a nitrogen spring finished product testing device and its usage method. A protective frame is mounted on the base frame, and a pressure testing mechanism is installed within the protective frame. The pressure testing mechanism is mounted on the base frame, which also houses a support mechanism for placing the nitrogen spring finished product. A leak detection mechanism is used to spray a testing liquid onto the nitrogen spring finished product. The device uses a servo press in conjunction with a pressure sensor and a pressure monitoring instrument to test the nitrogen spring finished product, outputting a pressure monitoring curve while detecting the pressure. It is equipped with an alcohol spraying structure to detect whether the nitrogen spring is leaking. The device is compatible with nitrogen springs of various diameters and heights for fully automated, one-stop testing, ensuring safety and reliability.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A nitrogen spring finished product testing device, comprising: A base frame, on which a protective frame is installed; A pressure detection mechanism is located within the protective frame and is mounted on the base frame. A support mechanism for holding finished nitrogen springs is mounted on the base frame; Leakage detection equipment, used to spray detection liquid onto finished nitrogen springs; and Electrical control systems used for system control; The pressure detection mechanism is used to detect the finished nitrogen spring placed on the bearing mechanism.

[0007] Furthermore, the pressure detection mechanism includes a drive assembly, a guide assembly, and a pressing assembly for performing the detection. The guide assembly includes four guide rods arranged parallel to each other. One end of each of the four guide rods is fixed to the base frame, and the other end of each guide rod is fixed to an electric cylinder mounting plate. The drive assembly is mounted on the electric cylinder mounting plate, and the pressing assembly is mounted on the output end of the drive assembly. The pressing assembly is located above the bearing mechanism, and the drive assembly can drive the pressing assembly to move in a direction closer to or further away from the bearing mechanism under the constraint of the guide assembly.

[0008] Furthermore, the drive assembly includes a servo motor and an electric cylinder. The servo motor is connected to the electric cylinder via a belt. The electric cylinder is mounted on the electric cylinder mounting plate and is connected to the press-fit assembly.

[0009] Furthermore, the pressing assembly includes a pressing plate and a pressure sensor fixed to the end of the lead screw. The pressing plate is slidably connected to the four guide rods, and the pressure sensor is connected to the pressing plate.

[0010] Furthermore, the air leakage detection mechanism includes a profile frame, a servo module, a peristaltic pump, and a first three-axis cylinder mounted on a base frame. The servo module is fixedly mounted on the profile frame. The output end of the servo module is connected to the first three-axis cylinder, and the first three-axis cylinder can move along the height direction of the servo module. A guide block is installed at the output end of the first three-axis cylinder. The guide block is connected to the peristaltic pump and is also connected to a flexible hose so that the guide block can move horizontally after the first three-axis cylinder is working.

[0011] Furthermore, the supporting mechanism includes a bottom working plate, which is fixedly installed on the base frame and is used to place the finished nitrogen spring.

[0012] Furthermore, a shim assembly is installed on the bottom working plate, the shim assembly being used to place the finished nitrogen spring.

[0013] Furthermore, the elevation assembly includes a second three-axis cylinder, a support block, and a limiting assembly fixed on the bottom working plate. The second three-axis cylinder is mounted on the bottom working plate, and the support block is fixed at the output end of the second three-axis cylinder. The support block is equipped with a positioning assembly, which is used to place the finished nitrogen spring. The limiting assembly is located on both sides of the support block.

[0014] Furthermore, the limiting component includes two limiting strips fixed to the bottom working plate, the two limiting strips being parallel to each other and respectively set tightly against the bearing block.

[0015] Furthermore, the positioning component includes a connecting plate, a shim column, a first positioning plate, and a second positioning plate. The connecting plate is fixed to the bearing block, and the shim column is fixed to the upper part of the connecting plate. The shim column is used to place the finished nitrogen spring. The bearing block is slidably connected to the first positioning plate, and the first positioning plate is located at the location where the finished nitrogen spring is placed on the bottom working plate. The shim column is slidably connected to the second positioning plate, and the second positioning plate is located at the location where the finished nitrogen spring is placed on the shim column.

[0016] Furthermore, this invention also claims protection for a method of using a nitrogen spring finished product testing device, which includes the following steps: S1. The operator selects and confirms the model of the nitrogen spring to be tested on the touch screen. S2. The electrical control system analyzes and judges the pre-stored product information to determine the alcohol spray height and whether the second and third axis cylinders of the bearing mechanism extend or retract. S3. Place the finished nitrogen spring to be tested at the center of the mark (the center of the mark on the work board or the center of the mark on the raised column). S4. The operator steps out of the equipment and presses the green start button with both hands simultaneously to start the equipment. S5. The servo module of the air leakage detection mechanism is raised to the corresponding height of the product, the first three-axis cylinder extends, and alcohol is sprayed out at the center of the piston. S6. The pressure testing mechanism presses down the pressure plate, and the pressure testing mechanism outputs the pressure value and pressure curve. The operator observes from outside the equipment whether the nitrogen spring to be tested is leaking during the pressing process. If there is a leak, press the red button next to the equipment to stop the equipment from running. Otherwise, the equipment continues to press down until the action ends and returns to the original position. S7. Observe the pressure value and pressure curve to determine whether the standard is met; S8. The operator manually feeds the material.

[0017] Compared with existing technologies, the beneficial effects of this solution are: 1. The nitrogen spring finished product testing equipment of the present invention includes a protective frame mounted on a base frame, a pressure detection mechanism mounted inside the protective frame, and a bearing mechanism mounted on the base frame for placing the nitrogen spring finished product. A leak detection mechanism is also included for spraying detection liquid onto the nitrogen spring finished product. In this nitrogen spring finished product testing equipment, the pressure detection mechanism uses a servo motor in conjunction with a pressure sensor to achieve precise pressure control. The leak detection mechanism is mounted on the base frame of the pressure detection mechanism, located behind it. Its movement allows for spraying detection liquid onto different positions of the nitrogen spring finished product on the bearing mechanism. The bearing mechanism is located directly below the pressure detection mechanism and is suitable for accommodating nitrogen spring finished products of various specifications and sizes. The electrical control system includes a pressure testing instrument to output pressure curves and a touchscreen for automated control. This nitrogen spring finished product testing equipment of the present invention performs leak and pressure detection while being compatible with multiple product specifications, and can output data for archiving, ensuring worker safety while achieving standardized archiving of nitrogen spring finished products.

[0018] 2. The nitrogen spring finished product testing equipment of the present invention uses a servo press in conjunction with a pressure sensor and a pressure monitoring instrument to test the finished nitrogen springs, and outputs a pressure monitoring curve while detecting the pressure; it is equipped with an alcohol spraying structure to detect whether the nitrogen spring is leaking; and the equipment is compatible with nitrogen springs of different specifications with multiple diameters and heights for fully automatic one-stop testing, which is safe and reliable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the nitrogen spring finished product testing equipment; Figure 2 This is a schematic diagram of the overall structure of the nitrogen spring finished product testing equipment without the protective frame. Figure 3 for Figure 2 Side view; Figure 4 This is a schematic diagram of the load-bearing mechanism; Figure 5 This is a schematic diagram of the retraction structure of the second and third axis cylinders of the load-bearing mechanism; Figure 6 This is a schematic diagram of a leak detection mechanism.

[0020] The reference numerals in the attached figures are as follows: Base frame 1, protective frame 11, electrical cabinet 12, pressure detection mechanism 2, guide rod 21, electric cylinder mounting plate 22, servo motor 23, lead screw 24, pressing plate 25, pressure sensor 26, bearing mechanism 3, bottom working plate 31, second three-axis cylinder 32, bearing block 33, limit strip 34, connecting plate 35, shim column 36, first positioning plate 37, second positioning plate 38, air leakage detection mechanism 4, profile frame 41, servo module 42, first three-axis cylinder 43, guide block 44, hose 45. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] A nitrogen spring finished product testing device, such as Figures 1-3 As shown, it includes: Base frame 1, on which a protective frame 11 is installed; The pressure detection mechanism 2 is located within the protective frame 11 and is mounted on the base frame 1; The supporting mechanism 3, which can hold finished nitrogen springs, is mounted on the base frame 1; Leakage detection mechanism 4, which is used to spray detection liquid onto the finished nitrogen spring; and Electrical control systems used for system control; The pressure detection mechanism 2 is used to detect the finished nitrogen spring placed on the bearing mechanism 3.

[0023] According to an embodiment of the present invention, the electrical control system is integrated on the protective frame 11. The base frame 1 serves as the base of the entire testing equipment, and the protective frame 11 is an outer protective frame fixed to the base frame 1 for protection during the operation of the nitrogen spring testing equipment. The lower part of the base frame 1 is the electrical cabinet 12. The pressure testing mechanism 2 uses a servo motor 23 in conjunction with a pressure sensor 26 to achieve precise pressure control. The leakage detection mechanism 4 is installed on the base frame 1 of the pressure testing mechanism 2, located behind the pressure testing mechanism 2. By moving, it sprays detection liquid at different positions on the nitrogen spring finished product on the carrying mechanism 3. In this embodiment, the detection liquid is alcohol. The carrying mechanism 3 is located directly below the pressure testing mechanism 2 and is used to adapt to nitrogen spring finished products of various specifications and sizes. The electrical control system is equipped with a pressure testing instrument to output pressure curves and a touch screen for automated control. The nitrogen spring finished product testing equipment of the present invention performs leakage and pressure testing while being compatible with multiple specifications of products, and can output data for archiving, ensuring worker safety while achieving standardized archiving of nitrogen spring finished products.

[0024] Furthermore, the pressure detection mechanism 2 includes a drive assembly, a guide assembly, and a pressing assembly for performing the detection. The guide assembly includes four guide rods 21 arranged parallel to each other. One end of each guide rod 21 is fixed to the base frame 1, and the other end of each guide rod 21 is fixed to an electric cylinder mounting plate 22. The drive assembly is mounted on the electric cylinder mounting plate 22, and the pressing assembly is mounted on the output end of the drive assembly. The pressing assembly is located above the bearing mechanism 3, and the drive assembly can drive the pressing assembly to move in a direction closer to or further away from the bearing mechanism 3 under the constraint of the guide assembly.

[0025] According to an embodiment of the present invention, a pressure detection mechanism 2 is provided. The pressure detection mechanism 2 is located above the base frame 1, and four guide rods 21 are vertically mounted on the base frame 1. The upper ends of the guide rods 21 are fixed to the electric cylinder mounting plate 22. The pressing assembly is disposed between the electric cylinder mounting plate 22 and the base frame 1. A drive assembly is mounted on the upper part of the electric cylinder mounting plate 22 and is used to drive the pressing assembly to move in a direction close to or away from the bearing mechanism 3 under the constraint of the guide assembly.

[0026] Furthermore, the drive assembly includes a servo motor 23 and an electric cylinder. The servo motor 23 is connected to the electric cylinder via a belt. The electric cylinder is mounted on the electric cylinder mounting plate 22 and is connected to the pressing assembly. The electric cylinder includes a lead screw 24 and a piston rod. The rotation of the lead screw 24 drives the piston rod to move vertically, and the piston rod is connected to the pressing assembly.

[0027] Furthermore, the pressing assembly includes a pressing plate 25 and a pressure sensor 26 fixed to the end of the lead screw 24. The pressing plate 25 is slidably connected to the four guide rods 21, and the pressure sensor 26 is connected to the pressing plate 25.

[0028] According to one embodiment of the present invention, specifically, the guide rod 21 is disposed through the pressure plate 25, and the pressure sensor 26 is fixedly connected to the pressure plate 25 by fasteners. The pressure sensor 26 is located between the pressure plate 25 and the lead screw 24.

[0029] The servo motor 23 and the lead screw 24 adopt an existing structure (i.e., an electric cylinder). The servo motor 23 and the lead screw 24 are arranged parallel to each other. The servo motor 23 drives the lead screw 24 to rotate via a belt, which in turn pushes the threaded cylinder to move in the height direction. The lead screw 24 is externally fixed to the electric cylinder mounting plate 22 via a flange. Since the drive component in this embodiment uses a servo motor 23, it can stably output the pressure values ​​of the nitrogen spring at different strokes, and the pressure values ​​and pressure curves can be displayed by the control system.

[0030] Furthermore, such as Figure 6As shown, the air leakage detection mechanism 4 includes a profile frame 41 mounted on the base frame 1, a servo module 42, a peristaltic pump (not visible in the figure), and a first three-axis cylinder 43. The servo module 42 is fixedly mounted on the profile frame 41. The output end of the servo module 42 is connected to the first three-axis cylinder 43, and the first three-axis cylinder 43 can move along the height direction of the servo module 42. A guide block 44 is installed at the output end of the first three-axis cylinder 43. The guide block 44 is connected to the peristaltic pump and is also connected to a hose 45 so that the guide block 44 can move horizontally after the first three-axis cylinder 43 is working.

[0031] According to one embodiment of the present invention, a first three-axis cylinder 43 is installed in a horizontal direction. A guide block 44 is installed at the output end of the piston rod of the first three-axis cylinder 43 to drive the guide block 44 to move horizontally. The first three-axis cylinder 43 itself can move in the opposite direction of height by being driven by a servo module 42. The servo module 42 can adopt an existing structure and is vertically installed on the profile frame 41. The guide block 44 is installed at the rod end of the first three-axis cylinder 43, and the guide block 44 is also connected to a hose 45. According to the nitrogen springs of different height specifications, the servo module 42 can drive the cylinder to move up and down to control the height of alcohol spraying. When the first three-axis cylinder 43 is in a non-working state, it gives way to the finished nitrogen spring to be tested. The first three-axis cylinder 43 extends, the outlet of the hose 45 points to the piston, the peristaltic pump starts to work, and the alcohol is accurately sprayed onto the piston of the finished nitrogen spring for testing.

[0032] Furthermore, such as Figure 4 and Figure 5 As shown, the supporting mechanism 3 includes a bottom working plate 31, which is fixedly installed on the base frame 1. The bottom working plate 31 is used to place the finished nitrogen spring.

[0033] According to an embodiment of the present invention, the supporting mechanism 3 is only a bottom working plate 31 fixedly installed on the base frame 1. The bottom working plate 31 has a center placement mark in the middle for placing the finished nitrogen spring.

[0034] Furthermore, a shim assembly is installed on the bottom working plate 31, which is used to place the finished nitrogen spring.

[0035] Furthermore, the elevation assembly includes a second three-axis cylinder 32, a support block 33, and a limiting assembly fixed to the bottom working plate 31. The second three-axis cylinder 32 is mounted on the bottom working plate 31, and the support block 33 is fixed to the output end of the second three-axis cylinder 32. The support block 33 is equipped with a positioning assembly for placing the nitrogen spring product. The limiting assembly is located on both sides of the support block 33. In order to be compatible with nitrogen spring products of different height specifications, the second three-axis cylinder 32 is a three-axis cylinder with a large diameter. When the second three-axis cylinder 32 is working, the support block 33 slides along the surface of the bottom working plate 31, and the positioning assembly is used to position the nitrogen spring product.

[0036] Furthermore, the limiting component includes two limiting strips 34 fixed on the bottom working plate 31. The two limiting strips 34 are parallel to each other and are respectively set in close contact with the support block 33. This can prevent the trajectory of the support block 33 from deviating when it moves.

[0037] Furthermore, the positioning assembly includes a connecting plate 35, a shim column 36, a first positioning plate 37, and a second positioning plate 38. The connecting plate 35 is fixed to the bearing block 33, and the shim column 36 is fixed to the upper part of the connecting plate 35. The shim column 36 is used to place the finished nitrogen spring. The bearing block 33 is slidably connected to the first positioning plate 37, which is located at the location where the finished nitrogen spring is placed on the bottom working plate 31. The shim column 36 is slidably connected to the second positioning plate 38, which is located at the location where the finished nitrogen spring is placed on the shim column 36.

[0038] In this embodiment, the first positioning plate 37 and the second positioning plate 38 have the same structure. Both have a "V"-shaped groove structure with a corresponding nitrogen spring forming a cylindrical outer wall on one side, and a strip hole on the other side that slides to connect with the connecting plate 35 on the bearing block 33. The positioning assembly can adjust the first positioning plate 37 according to the cylinder diameter to position the cylinder. When the product height is low, the cylinder rod of the second three-axis cylinder 32 extends, and the workpiece is placed in the center position on the shim column 36. The second positioning plate 38 is then adjusted according to the cylinder diameter to position the cylinder. The entire set of equipment has great product compatibility and can determine whether the product is leaking while detecting pressure, thus saving efficiency.

[0039] Furthermore, this invention also claims protection for a method of using a nitrogen spring finished product testing device, which includes the following steps: S1. The operator selects and confirms the model of the nitrogen spring to be tested on the touch screen. S2. The electric control system analyzes and judges the pre-stored product information to determine the alcohol spray height and whether the second three-axis cylinder 32 of the bearing mechanism 3 extends or retracts. S3. Place the finished nitrogen spring to be tested at the center of the mark (the center of the mark on the work board or the center of the mark on the raised column 36). S4. The operator steps out of the equipment and presses the green start button with both hands simultaneously to start the equipment. S5, the air leakage detection mechanism 4 servo module 42 is raised to the corresponding height of the product, the first three-axis cylinder 43 extends, and alcohol is sprayed out at the center of the piston. S6. Press down the pressure plate 25 of the pressure detection mechanism 2. The pressure detection mechanism outputs the pressure value and pressure curve. The operator observes from outside the equipment whether the nitrogen spring product to be tested is leaking during the pressing process. If there is a leak, press the red button next to the equipment to stop the equipment from running. Otherwise, the equipment continues to press down until the action ends and returns to the original position. S7. Observe the pressure value and pressure curve to determine whether the standard is met; S8. The operator manually feeds the material.

[0040] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A nitrogen spring finished product testing device, characterized in that, include: A base frame, on which a protective frame is installed; A pressure detection mechanism is located within the protective frame and is mounted on the base frame. A support mechanism for holding finished nitrogen springs is mounted on the base frame; A leak detection device, used to spray a detection liquid onto finished nitrogen springs; as well as Electrical control systems used for system control; The pressure detection mechanism is used to detect the finished nitrogen spring placed on the bearing mechanism.

2. The nitrogen spring finished product testing equipment according to claim 1, characterized in that: The pressure detection mechanism includes a drive assembly, a guide assembly, and a pressing assembly for performing the detection. The guide assembly includes four guide rods arranged parallel to each other. One end of each guide rod is fixed to the base frame, and the other end of each guide rod is fixed to an electric cylinder mounting plate. The drive assembly is mounted on the electric cylinder mounting plate, and the pressing assembly is mounted on the output end of the drive assembly. The pressing assembly is located above the bearing mechanism, and the drive assembly can drive the pressing assembly to move in a direction closer to or further away from the bearing mechanism under the constraint of the guide assembly.

3. The nitrogen spring finished product testing equipment according to claim 2, characterized in that, The drive assembly includes a servo motor and an electric cylinder. The servo motor is connected to the electric cylinder via a belt. The electric cylinder is mounted on the electric cylinder mounting plate and is connected to the press assembly.

4. The nitrogen spring finished product testing equipment according to claim 3, characterized in that: The press-fit assembly includes a press-fit plate and a pressure sensor fixed to the end of the lead screw. The press-fit plate is slidably connected to the four guide rods, and the pressure sensor is connected to the press-fit plate.

5. The nitrogen spring finished product testing equipment according to claim 3, characterized in that: The air leakage detection mechanism includes a profile frame, a servo module, a peristaltic pump, and a first three-axis cylinder mounted on a base frame. The servo module is fixedly mounted on the profile frame. The output end of the servo module is connected to the first three-axis cylinder, and the first three-axis cylinder can move along the height direction of the servo module. A guide block is installed at the output end of the first three-axis cylinder. The guide block is connected to the peristaltic pump and is also connected to a flexible hose so that the guide block can move horizontally after the first three-axis cylinder is working.

6. The nitrogen spring finished product testing equipment according to claim 5, characterized in that: The supporting mechanism includes a bottom working plate, which is fixedly installed on the base frame and is used to place the finished nitrogen spring.

7. The nitrogen spring finished product testing equipment according to claim 6, characterized in that: A shim assembly is installed on the bottom working plate. The shim assembly includes a second three-axis cylinder, a bearing block, and a limiting assembly fixed on the bottom working plate. The second three-axis cylinder is installed on the bottom working plate, and the bearing block is fixed at the output end of the second three-axis cylinder. A positioning assembly is installed on the bearing block. The positioning assembly is used to place the finished nitrogen spring. The limiting assembly is located on both sides of the bearing block.

8. The nitrogen spring finished product testing equipment according to claim 7, characterized in that: The limiting component includes two limiting strips fixed to the bottom working plate. The two limiting strips are parallel to each other and are respectively set close to the bearing block.

9. A nitrogen spring finished product testing device according to claim 8, characterized in that: The positioning assembly includes a connecting plate, a shim column, a first positioning plate, and a second positioning plate. The connecting plate is fixed to the bearing block, and the shim column is fixed to the upper part of the connecting plate. The shim column is used to place the finished nitrogen spring. The bearing block is slidably connected to the first positioning plate, which is located at the position where the finished nitrogen spring is placed on the bottom working plate. The shim column is slidably connected to the second positioning plate, which is located at the position where the finished nitrogen spring is placed on the shim column.

10. A method for using a nitrogen spring finished product testing equipment, characterized in that... Using a nitrogen spring finished product testing device as described in any one of claims 1-9, the process includes the following steps: S1. The operator selects and confirms the model of the nitrogen spring to be tested on the touch screen. S2. The electrical control system analyzes and judges the pre-stored product information to determine the alcohol spray height and whether the second and third axis cylinders of the bearing mechanism extend or retract. S3. Place the finished nitrogen spring to be tested at the center of the mark (the center of the mark on the work board or the center of the mark on the raised column). S4. The operator steps out of the equipment and presses the green start button with both hands simultaneously to start the equipment. S5. The servo module of the air leakage detection mechanism is raised to the corresponding height of the product, the first three-axis cylinder extends, and alcohol is sprayed out at the center of the piston. S6. The pressure testing mechanism presses down the pressure plate, and the pressure testing mechanism outputs the pressure value and pressure curve. The operator observes from outside the equipment whether the nitrogen spring to be tested is leaking during the pressing process. If there is a leak, press the red button next to the equipment to stop the equipment from running. Otherwise, the equipment continues to press down until the action ends and returns to the original position. S7. Observe the pressure value and pressure curve to determine whether the standard is met; S8. The operator manually feeds the material.

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