A vacuum pressure switch testing device

Abstract

The embodiment of the present disclosure provides a vacuum pressure switch test device, which comprises a base, a microswitch fixing clamp rotatably connected with the base through a hinge shaft, wherein the microswitch fixing clamp is provided with an arc-shaped guide rail, and a plurality of groups of angle positioning grooves are arranged on the arc-shaped guide rail; a test rod assembly is installed on the base through a slide rail structure and is used for applying a mechanical trigger force to the microswitch; a pressure cabin is sealingly connected above the base; a vacuum pump interface is connected on one side of the pressure cabin through a threaded interface and is used for connecting a vacuum pump and providing a vacuum source for the system; wherein a conical pressing block is arranged above the arc-shaped guide rail to clamp the microswitch in cooperation with the angle positioning grooves, and a rubber anti-skid pad is arranged on the bottom of the conical pressing block. Through the scheme of the embodiment of the present disclosure, different test requirements can be met.

Description

Technical Field

[0001] This application relates to the field of test and measurement equipment technology, specifically to a vacuum pressure switch test device. Background Technology

[0002] Vacuum pressure switch testing equipment is primarily used to detect and calibrate various performance parameters of vacuum pressure switches, ensuring their stability and accuracy in practical applications. This type of equipment evaluates the operating characteristics and reliability of vacuum pressure switches by simulating different pressure or vacuum environments. However, in practical use, such equipment often faces the challenge of adapting to different testing requirements. For example, it needs to be compatible with multiple types of vacuum pressure switches, support different pressure ranges, or meet the requirements of specific industry standards. These issues pose significant challenges to the flexibility and versatility of the equipment. Summary of the Invention

[0003] In view of this, the present disclosure provides a vacuum pressure switch testing device that at least partially solves the problems existing in the prior art.

[0004] This application discloses a vacuum pressure switch testing device, comprising:

[0005] Base;

[0006] A micro switch fixing fixture is rotatably connected to the base via a hinge shaft, wherein the micro switch fixing fixture has an arc-shaped guide rail, and the arc-shaped guide rail is provided with multiple sets of equally spaced angle positioning grooves;

[0007] The test rod assembly is mounted on the base via a slide rail structure and is used to apply a mechanical triggering force to the micro switch;

[0008] The pressure chamber is sealed and connected to the base above it;

[0009] The vacuum pump interface component, connected to the pressure chamber side via a threaded interface, is used to connect the vacuum pump and provide a vacuum source to the system; among which,

[0010] A tapered pressure block is provided above the arc-shaped guide rail to clamp the micro switch in conjunction with the angle positioning groove, and a rubber anti-slip pad is installed at the bottom of the tapered pressure block.

[0011] Preferably, the adjustable angle positioning groove is V-shaped.

[0012] Preferably, the top of the base is provided with an arc-shaped guide groove that mates with the arc-shaped guide rail, for supporting and guiding the rotation of the micro switch fixing clamp.

[0013] Preferably, the test rod assembly is equipped with a flexible contact assembly to accommodate different types of micro switch contact structures.

[0014] Preferably, the base is provided with adjustable horizontal support feet at the bottom to keep the base level on uneven surfaces.

[0015] Preferably, a limit ring is provided on the outer side of the hinge shaft to prevent the micro switch fixing clamp from loosening.

[0016] Preferably, an observation window is installed on one side of the pressure chamber.

[0017] Preferably, a spring reset mechanism is provided between the test rod assembly and the base.

[0018] Preferably, the vacuum pump interface integrates an electronic pressure sensor to monitor the pressure value inside the pressure chamber.

[0019] Preferably, each end of the arc guide groove is provided with a set of limit blocks to limit the rotation range of the micro switch fixing fixture.

[0020] This disclosure provides a vacuum pressure switch testing device, comprising: a base; a micro switch fixing clamp rotatably connected to the base via a hinge shaft, wherein the micro switch fixing clamp has an arc-shaped guide rail with multiple sets of equally spaced angle positioning grooves; a test rod assembly mounted on the base via a slide rail structure for applying a mechanical triggering force to the micro switch; a pressure chamber sealed above the base; and a vacuum pump interface component connected to one side of the pressure chamber via a threaded interface for connecting a vacuum pump and providing a vacuum source to the system. A conical pressure block is provided above the arc-shaped guide rail to clamp the micro switch in conjunction with the angle positioning grooves, and a rubber anti-slip pad is installed at the bottom of the conical pressure block. This disclosure provides a solution for adapting to different testing requirements. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the exemplary embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the appearance of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0025] Figure 4 This is an exploded view of the micro switch fixing fixture in this utility model.

[0026] In the diagram: 1. Base; 2. Microswitch fixing fixture; 21. Angle positioning groove; 22. Quick locking knob; 23. Arc-shaped guide rail; 3. Vacuum pump interface; 4. Pressure chamber; 5. Test rod assembly; 6. Limit stop; 7. Pressure sensor; 8. Conical pressure block; 9. Arc-shaped guide groove; 10. Flexible contact assembly; 11. Adjustable horizontal support; 12. Hinge shaft; 13. Limit clasp; 14. Observation window; 15. Spring reset mechanism Detailed Implementation

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] like Figure 1 and Figure 2 As shown, a vacuum pressure switch testing device according to this application includes: a base 1, a microswitch fixing fixture 2, a vacuum pump interface 3, a pressure chamber 4, and a test rod assembly 5. These components are carefully designed to meet the performance testing requirements of the microswitch under different testing environments.

[0029] The base 1 of this equipment, as one of the core components, supports the entire testing device and provides a stable mounting platform for the remaining components. It is designed with mounting holes and hinge slots to facilitate the secure mechanical installation of other functional components in designated positions. The precise machining process on the base 1 ensures a rational overall layout and stable operation of the equipment. For example, in specific implementations, a plane with a specific shape is machined from high-precision aluminum alloy material, and several through holes or grooves are provided on its surface to accommodate various connecting accessories.

[0030] The microswitch fixing clamp 2 is used to stably hold the microswitch and is mounted to the base 1 via a hinge structure. The clamp has an adjustable angle positioning groove 21 inside (see details). Figure 4The operator can adjust the spatial angle of the microswitch relative to the horizontal plane or the test axis through the positioning slot. Simultaneously, a quick-locking knob 22 is located on one side of the fixture, allowing the microswitch to be quickly clamped without loosening after orientation adjustment. The presence of the arc-shaped guide rail 23 further ensures smoothness during the adjustment process, allowing the operator to manually slide the entire fixture for initial positioning as needed, and then use the knob to lock it in place. In terms of technical details, this guide structure is composed of precision-machined stainless steel parts, combined with an elastic reset component to achieve precise positioning.

[0031] The vacuum pump interface 3 is primarily responsible for connecting the piping between the external vacuum pump and the pressure chamber 4, thereby providing the necessary vacuum conditions to create the required test atmosphere. This part typically features a flanged interface or a standardized quick-connect interface for direct plug-and-play connection to the corresponding system piping network. The vacuum pump interface 3 also incorporates a backflow prevention design mechanism—such as a one-way valve element often embedded within the cavity—to prevent the reverse flow of the low-pressure environment that has already been created when the pumping operation stops.

[0032] Pressure chamber 4 is used to simulate real-world vacuum conditions or other special atmospheric pressure scenarios. This component is a precision-machined circular cavity with threaded connectors at both ends to match the vacuum pump interface 3 and the subsequent test object inlet pipeline requirements, thus forming a complete closed-loop circulation circuit. By selecting an appropriate size and wall thickness specification for pressure chamber 4 based on the actual application, it can broadly cover various extreme condition testing and capability evaluation tasks ranging from atmospheric pressure to below several megapascals.

[0033] The test rod assembly 5 bears the core responsibility of applying a predetermined mechanical triggering force to the micro switch, and uses two sets of linear guide units arranged in parallel above the base 1 for precise displacement adjustment. The main body of the rod is shaped like a long bar, with a flexible probe at one end for contacting the target area; the other end is equipped with a handwheel drive structure or a servo motor control system to generate a continuous and controllable force to propel the probe to the specified position. Furthermore, an encoding and reading device can be added to measure and feedback the travel distance to meet the requirements for quantitative result output.

[0034] like Figure 4As shown, in one embodiment, the microswitch fixing fixture 2 of the vacuum pressure switch testing equipment of this application achieves the functions of adjusting the installation angle and positioning the microswitch step by step through structural optimization. The main feature of this microswitch fixing fixture 2 is that its arc-shaped guide rail 23 is provided with multiple equally spaced angle positioning grooves 21. These angle positioning grooves 21 are used to progressively limit the adjustment angle of the microswitch, ensuring that each adjustment can be accurately and stably fixed in the designated position. The shape of the arc-shaped guide rail 23 combines the functional requirements of the fixing fixture, allowing the fixture to move along a certain curvature range, providing support for the installation of the microswitch at different angles.

[0035] Specifically, the design of the arc-shaped guide rail 23 determines the range of motion and stability of the angle adjustment. The angle positioning groove 21 works in conjunction with the quick-locking knob 22; after selecting a suitable positioning groove, the quick-locking knob 22 can securely fix the fixture through mechanical locking. This design allows the operator to easily perform fine-tuning actions and quickly switch test states.

[0036] For example, high-precision machining processes can be used to manufacture the arc-shaped guide rail 23 and its angle positioning groove 21 to ensure the uniformity of the positioning groove distribution and dimensional accuracy. Subsequently, a pin mechanism with an elastic component can be provided at the end of the quick-locking knob 22. This pin generates moderate friction when pressed into the positioning groove, satisfying both adjustment flexibility and fixed stability. In this technical solution, the mating positions between components are strictly limited within the arc-shaped track range, thereby avoiding problems such as loose connections or misalignment.

[0037] like Figure 4 As shown, in one embodiment, the microswitch clamp 2 of the vacuum pressure switch testing device of this application employs a unique adjustable structure. Specifically, its key feature is the fine adjustment of the microswitch's angular position through a cleverly designed angle positioning groove 21. This angle positioning groove 21 has a V-shaped structure, is installed in the microswitch clamp 2, and cooperates with the quick-lock knob 22, thereby enabling the microswitch to be securely clamped within a specific operating range and allowing for angle changes. This device is fixedly connected to the hinge shaft 12 on the base 1, facilitating fine-tuning throughout the device while maintaining coordination with other components.

[0038] Furthermore, the V-shaped structure allows the microswitch to move along the arc-shaped guide rail 23 and select different angles within a specified range. The arc-shaped guide rail 23 extends through the fixed clamp section in the structural layout. The quick-lock knob 22 is used to ultimately ensure the stability of the selected positioning state to meet the precision requirements of complex testing tasks and conditions. The position and form of this positioning system directly determine the technical boundaries of the device's compatibility with various types of switches.

[0039] For example, this adjustable angle positioning function is achieved by precision CNC machining of a standard V-shaped groove, combined with stainless steel material to enhance durability. Furthermore, a spring-loaded return mechanism ensures that the device returns to its initial state after each unlocking, guaranteeing consistency across multiple operations. This method makes the pre-assembly and testing preparation process more convenient and reliable.

[0040] like Figure 4 As shown, in one embodiment, the micro switch fixing fixture 2 of the vacuum pressure switch testing equipment of this application improves reliability and stability through an improved clamping method. Specifically, the quick-lock knob 22 is used to adjust the clamping force, and the conical pressure block 8 achieves safe clamping of the micro switch. The conical pressure block 8 adopts a specific geometric design, the shape of which allows force to be transmitted to the surface of the micro switch when the quick-lock knob 22 is rotated, and the conical pressure block 8 is located below the quick-lock knob 22, playing a role in stable fixation.

[0041] Furthermore, to prevent damage to the microswitch surface due to direct contact, a rubber anti-slip pad is fitted to the bottom of the conical pressure block 8. The rubber anti-slip pad provides soft protection and enhances clamping stability through friction. The pad is fixed to the bottom surface of the conical pressure block 8 by adhesive or other suitable means, ensuring a secure connection to accommodate vibrations or force changes that may occur during testing.

[0042] For example, when the operator turns the quick-lock knob 22, the resulting longitudinal displacement drives the conical pressure block 8 downward and presses against the micro switch. Due to the conical structure, the force applied by the pressure block can be distributed more evenly in all directions. The rubber anti-slip pad acts as a buffer element, directly acting on the micro switch housing to achieve a protective function, while ensuring clamping stability, thus adapting to the needs of micro switches of different specifications.

[0043] like Figure 2 As shown, in one embodiment, the base 1 of a vacuum pressure switch testing device of this application is provided with a set of arc-shaped guide grooves 9 on its top, which cooperate with the arc-shaped guide rail 23 in the micro switch fixing fixture 2 to guide and support the angular rotation of the micro switch fixing fixture 2. Specifically, this arc-shaped guide groove 9 design allows the micro switch fixing fixture 2 to smoothly and stably adjust its angular position within the rotation range of the hinge shaft 12, thereby adapting to the needs of different testing scenarios. The arc-shaped guide grooves 9 are installed in the corresponding area on the top of the base 1, and their arc trajectory perfectly matches the shape of the arc-shaped guide rail 23 on the micro switch fixing fixture 2, thereby providing reliable sliding support.

[0044] For example, the arc-shaped guide groove 9 can be precision machined and made of low-friction materials or surface treatment processes to reduce running resistance while ensuring stability over long-term use. Through this structural design, the microswitch fixing clamp 2 can be accurately positioned at any angle, ensuring that the force direction between the microswitch and the test rod assembly 5 always maintains the expected relationship. This method is both simple and efficient, achieving angle adjustment without adding complex mechanical structures.

[0045] like Figure 2 As shown, in one embodiment, a flexible contact assembly 10 is fitted to one end of the test rod assembly 5 of a vacuum pressure switch testing device according to this application. This component is mounted at the end of the test rod assembly 5, providing flexibility when in contact with the microswitch contact under test. The flexible contact assembly 10 is made of an elastic material, specifically silicone, polyurethane, or other composite materials with good elasticity, and its overall structure is designed as a replaceable module. In this way, the flexible contact assembly 10 can be adjusted according to different microswitch contact shapes, ensuring that the position of the force application point precisely matches the target test area.

[0046] Furthermore, the connection between the flexible contact assembly 10 and the test rod assembly 5 adopts a quick-release interface structure, such as a snap-fit ​​or magnetic fixing method, which facilitates the quick replacement of different types of flexible contact assemblies 10 according to different test requirements. Specifically, this connection method achieves the alignment of the flexible structure by embedding a positioning groove at the end of the test rod assembly 5, while ensuring that the contact will not shift or detach due to external force during the test.

[0047] For example, by pre-customizing flexible contacts of different diameters or shapes, appropriate flexible contact assemblies 10 can be selected for specific models of microswitches and assembled onto the test rod assembly 5. This modular assembly helps improve the compatibility of the entire testing equipment with different types of microswitches.

[0048] like Figure 2 As shown, in one embodiment, the base 1 of a vacuum pressure switch testing device of this application is provided with adjustable horizontal support legs 11 to ensure that the entire device remains level on uneven or inclined mounting surfaces. These horizontal support legs are installed at the bottom of the base 1 and are designed to allow for multi-directional height adjustment to adapt to complex placement environments. The specific structure includes a telescopic rod and a locking mechanism. The telescopic rod can be adjusted in length via threads or sleeve nesting, while the locking mechanism secures the required telescopic length by rotating a knob or tightening screws, thereby meeting the adjustment requirements for different height deviations. Furthermore, the horizontal support legs are distributed in different corner areas of the bottom of the base 1, ensuring uniform force distribution and good stability.

[0049] Specifically, in each horizontal support leg, the telescopic part is connected to the base 1 via a threaded connection or a slot. The telescopic part is locked into the appropriate position by manually adjusting and tightening it, while simultaneously using a level to confirm that the overall levelness meets the preset accuracy standard. In this way, whether operating indoors or in the field, the equipment can maintain the required operational accuracy on non-ideal surfaces.

[0050] like Figure 4 As shown, in one embodiment, the micro switch fixing fixture 2 of the vacuum pressure switch testing equipment of this application is connected to the base 1 via a hinge shaft 12. In the actual design and assembly process, a special structure is added to the periphery of the hinge shaft 12 to improve the overall performance. This structure consists of a limiting ring 13 disposed on the outside of the hinge shaft 12, which is used to constrain the connection part of the micro switch fixing fixture 2. The limiting ring 13 can prevent the micro switch fixing fixture 2 on the hinge shaft 12 from unexpectedly loosening or rotating due to external vibration or improper operation, thus ensuring the stability of the testing process.

[0051] The limiting ring 13 is positioned adjacent to the outer periphery of the hinge shaft 12, its internal shape matches the outer surface of the hinge shaft 12, and both ends are equipped with anti-detachment structures to ensure its secure installation. The limiting ring 13 is typically designed as a split type or an adjustable locking buckle to facilitate adjustment during equipment assembly and debugging. Furthermore, the limiting ring 13 does not interfere with the angle adjustment function of the microswitch fixing clamp 2; it only serves to prevent the device from falling off. For example, in actual production, the limiting ring 13 can be pre-fixed to a hinge shaft 12 of a specific size, and a tight fit can be ensured by an elastic clamping plate, ultimately achieving the technical requirements. This structural design allows the equipment to maintain stable connection under various conditions, while also facilitating later maintenance and replacement.

[0052] like Figure 1 As shown, in one embodiment, the pressure chamber 4 of the vacuum pressure switch testing device of this application is provided with an observation window 14 on its side wall. The observation window 14 is made of transparent material and is installed on the side wall of the pressure chamber 4. This design allows the user to directly observe the installation process and operating angle state of the microswitch without opening the pressure chamber 4. Since the testing environment involves vacuum or pressure changes, the observation window 14 is fixed to the pressure chamber 4 by a sealing structure and can withstand the stress under the corresponding environment, thereby avoiding any impact on the overall airtightness.

[0053] The observation window 14 may further include a reinforcing frame to enhance the robustness and sealing performance at the junction with the pressure chamber 4. To accommodate different viewing angles, the position of the observation window 14 can be rationally selected and determined during the design phase of the pressure chamber 4, based on the specific arrangement of the microswitches and the required viewing angle. For example, when the microswitches are located at a fixed point inside the pressure chamber 4, the position of the observation window 14 relative to that fixed point can be adjusted to ensure that the operator can clearly obtain relevant information from the outside.

[0054] Specifically, during the manufacturing process of pressure chamber 4, a transparent panel with an embedded sealing gasket can be assembled together first, and then the entire assembly can be fixed to the reserved opening area on the side wall of pressure chamber 4 using bolts, thereby forming a complete observation window 14 structure and meeting its functional requirements.

[0055] like Figure 2 As shown, in one embodiment, a spring reset mechanism 15 is added between the test rod assembly 5 and the base 1 of the vacuum pressure switch testing device of this application to improve the stability and repeatability during the application of triggering force. The spring reset mechanism 15 is installed between the test rod assembly 5 and the base 1, achieving stable pre-compression and return functions through a specific mechanical connection. Specifically, the spring reset mechanism 15 mainly consists of a compression spring and a guide rod structure, wherein the guide rod restricts the spring deformation path, ensuring that the force transmission proceeds along a predetermined direction. One end of this mechanism is fixed in a reserved mounting position on the base 1, and the other end is connected to the test rod assembly 5.

[0056] The spring return mechanism 15 is securely assembled at both ends by connecting components, ensuring that it can work in conjunction with the test rod assembly 5 and maintain a constant spring reaction force within its stroke range. For example, one end of the guide rod is inserted into the slider of the test rod assembly 5 and prevented from dislodging by a limiting collar; the spring is fitted onto the outside of the guide rod and axially positioned by retaining rings at both ends. This design ensures the accuracy of the reset of the test rod assembly 5 throughout its stroke range.

[0057] Specifically, the spring reset mechanism 15 uses a helical spring with excellent linear characteristics, paired with a hardened smooth guide rod to reduce friction and extend service life. This assembly method, combined with the slide rail movement characteristics of the test rod assembly 5, ensures consistent output of triggering force during equipment operation.

[0058] like Figure 3As shown, in one embodiment, an electronic pressure sensor 7 is integrated inside the vacuum pump interface 3 of the vacuum pressure switch testing device of this application. The electronic pressure sensor 7 is installed in the core area inside the vacuum pump interface 3, ensuring that it can accurately sense changes in the pressure flowing through the interface and transmit the detected pressure data to the controller in real time for analysis and display. Because the electronic pressure sensor 7 is integrated inside the vacuum pump interface 3, its position is between the connecting pipe and the vacuum pump channel. This arrangement allows the sensor to directly capture the dynamic response characteristics of the chamber pressure when the system establishes or breaks the vacuum environment, thus providing high-precision monitoring support. Combined with the design structure of the pressure chamber 4 and the testing system, the monitoring results of the electronic pressure sensor 7 provide necessary reference data for microswitch trigger calibration, enabling the operation of the entire system to be based on accurate pressure information.

[0059] For example, a thin-film piezoelectric sensor can be selected as the implementation of the electronic pressure sensor 7, and it can be fixed to a designated position inside the vacuum pump interface 3 using epoxy resin or other high-strength adhesives. Simultaneously, a dedicated cable is used to lead the sensor signal terminal to an external controller interface to ensure the effectiveness and stability of signal transmission. Furthermore, a protective layer is provided at the contact point between the sensor and the vacuum medium to prevent leakage or external interference from affecting performance.

[0060] like Figure 2 As shown, in one embodiment, the microswitch fixing clamp 2 of the vacuum pressure switch testing equipment of this application is positioned in a specially structured mounting location, which achieves angle adjustment via a hinge with the base 1. To control its rotation range, limit stops 6 are provided on both sides of the arc guide groove 9 in the equipment. These components prevent the microswitch fixing clamp 2 from excessive rotation, thereby avoiding potential risks arising from exceeding the safe range. The aforementioned limiting components are rigidly connected to the equipment, located at one end of the plane of the arc guide groove 9, and ensuring sufficient assembly accuracy with other components of the equipment. Furthermore, the material selection of the limiting components typically needs to meet the requirements of the testing environment to adapt to the need for long-term stable operation.

[0061] Furthermore, to ensure precise positioning of the microswitch fixing fixture 2, the limiting structure is perfectly matched to its corresponding motion trajectory during installation, forming a closely related action relationship. For example, operational consistency within a specific rotation angle range is achieved by adjusting the position and size parameters of the arc guide groove 9 and the limiting components. Under this design, when the microswitch fixing fixture 2 approaches the set safety boundary, these limiting components provide effective physical obstruction.

[0062] In the technical implementation, the limiting function can be achieved by pre-fixing the limiting components at both ends to the end positions of the arc guide groove 9, while combining precision machining technology to ensure that the mating surfaces of the two are perfectly aligned. In this way, no matter what expected rotational movement the micro switch fixing fixture 2 undergoes, its running trajectory is always limited to this safe operating range constructed by the components at both ends.

[0063] In actual operation, when this device is used, the microswitch is placed in the microswitch fixing fixture 2, and the required test angle is adapted by adjusting the angle positioning groove 21. The microswitch is then firmly fixed using the quick-locking knob 22, and the microswitch is connected to the base 1 through a hinge structure. The vacuum pump interface 3 is connected to an external vacuum pump, while ensuring a reliable sealed connection between the pressure chamber 4 and the vacuum pump interface 3. By starting the vacuum pump, a vacuum environment is gradually established inside the pressure chamber 4, simulating different vacuum or pressure conditions. Based on this, the position and stroke of the trigger force are adjusted by moving the test rod assembly 5 mounted on the slide rail of the base 1, thereby mechanically triggering the microswitch. The performance of the microswitch under different conditions is then recorded and analyzed to complete the test process.

[0064] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A vacuum pressure switch testing device, characterized in that, include: Base (1); The micro switch fixing fixture (2) is rotatably connected to the base (1) via a hinge shaft (12), wherein the micro switch fixing fixture (2) has an arc-shaped guide rail (23), and the arc-shaped guide rail (23) is provided with multiple sets of equally spaced angle positioning grooves (21). The test rod assembly (5) is mounted on the base (1) via a slide rail structure and is used to apply a mechanical triggering force to the micro switch; Pressure chamber (4) is sealed and connected above the base (1); The vacuum pump interface component (3) is connected to one side of the pressure chamber (4) via a threaded interface, and is used to connect the vacuum pump and provide a vacuum source to the system; wherein, The arc-shaped guide rail (23) is provided with a conical pressure block (8) above it to cooperate with the angle positioning groove (21) to clamp the micro switch, and a rubber anti-slip pad is installed at the bottom of the conical pressure block (8).

2. The vacuum pressure switch testing device according to claim 1, characterized in that: The angle positioning groove (21) is V-shaped.

3. The vacuum pressure switch testing device according to claim 1, characterized in that: The base (1) has an arc guide groove (9) on its top that matches the arc guide rail (23) for supporting and guiding the rotation of the micro switch fixing fixture (2).

4. The vacuum pressure switch testing device according to claim 1, characterized in that: The test rod assembly (5) is equipped with a flexible contact assembly (10) to accommodate different types of micro switch contact structures.

5. The vacuum pressure switch testing device according to claim 1, characterized in that: The base (1) is provided with adjustable horizontal support feet (11) at the bottom so that the base (1) can maintain a horizontal state on uneven surfaces.

6. The vacuum pressure switch testing device according to claim 1, characterized in that: A limit ring (13) is provided on the outside of the hinge shaft (12) to prevent the micro switch fixing clamp (2) from loosening.

7. The vacuum pressure switch testing device according to claim 1, characterized in that: An observation window (14) is installed on one side of the pressure chamber (4).

8. The vacuum pressure switch testing device according to claim 1, characterized in that: A spring reset mechanism (15) is provided between the test rod assembly (5) and the base (1).

9. The vacuum pressure switch testing device according to claim 1, characterized in that: The vacuum pump interface (3) integrates an electronic pressure sensor (7) to monitor the pressure value inside the pressure chamber (4).

10. A vacuum pressure switch testing device according to claim 3, characterized in that: Each end of the arc guide groove (9) is provided with a set of limit blocks (6) to limit the rotation range of the micro switch fixing fixture (2).

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