A pressure switch fatigue test device

Abstract

The utility model relates to pressure switch test field, concretely relates to a pressure switch fatigue test device. Including test base, cylinder support, cylinder pressure head, displacement table base, mounting seat, cylinder, displacement table, pressure switch, cylinder support is fixed on test base, and cylinder is installed on cylinder support, and cylinder pressure head is connected with cylinder, displacement table base is fixed on test base, and displacement table base is installed with displacement table, and the other end of displacement table is connected with mounting seat, and mounting seat is equipped with at least one pressure switch. The device structure is simple, can be adapted to with a variety of models pressure switch, can adjust the installation position according to pressure switch compression stroke requirement, to realize the pressure switch test of higher precision.

Description

Technical Field

[0001] This utility model relates to the field of pressure switch testing, specifically to a pressure switch fatigue testing device. Background Technology

[0002] Among the various assemblies in a car, the transmission is one of the most important assemblies in the transmission system. The performance of the transmission has a significant impact on the overall vehicle performance, and the pressure switch for neutral and reverse gear is one of the key components of the transmission. The working principle of the pressure switch is based on the elastic mechanical effect. When medium pressure is applied to the elastic element, it will generate a corresponding bending strain. By adjusting the stiffness of the elastic element and the preset trigger value, precise control and detection can be achieved within different pressure ranges. When the external driving pressure on the power element can overcome the elastic force of the compression spring, it pushes the piston rod upward, causing the microswitch to actuate, that is, the normally closed contact opens and the normally open contact closes, thereby controlling the circuit connection.

[0003] In summary, qualified and stable pressure switches are crucial for the transmission assembly, and efficient and accurate testing equipment can provide strong support for pressure switch testing. As the number of pressure switch models increases, the testing tasks for pressure switches also increase dramatically. Currently, existing equipment can only meet the testing needs of some specific pressure switch models and cannot better adapt to newly developed pressure switches. Furthermore, only one pressure switch can be tested at a time, resulting in low testing efficiency and poor results. Utility Model Content

[0004] The purpose of this invention is to provide a pressure switch fatigue testing device that is not limited by the travel of the pressure switch push rod. The device allows for arbitrary adjustment of the pressure switch's installation position and push rod trigger stroke. Using a cylinder as the actuator, the pressure switch push rod is extended and reciprocated to verify the pressure switch's durability. Simultaneously, the pressure switch can be connected to an external feedback signal to monitor whether its function is normal during the working stroke.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model proposes a pressure switch fatigue testing device, including a test base, a cylinder support, a cylinder head, a displacement stage base, a mounting base, a cylinder, a displacement stage, and a pressure switch;

[0007] The cylinder support is fixed on the test base, the cylinder is installed on the cylinder support, the cylinder head is connected to the cylinder, the displacement stage base is fixed on the test base, the displacement stage is installed on the displacement stage base, the other end of the displacement stage is connected to the mounting base, and the mounting base is provided with at least one pressure switch.

[0008] As a further improvement, a limiting stop is also included, which is mounted on the test base and has one end abutting against the mounting seat to limit the movement of the mounting seat.

[0009] As a further improvement, the bottom of the displacement stage base is provided with a U-shaped groove, which is adapted to the protrusion on the test base.

[0010] As a further improvement, the displacement stage includes an upper displacement stage and a lower displacement stage, wherein the upper displacement stage is fixedly connected to the mounting base, and the lower displacement stage is connected to the displacement stage base.

[0011] As a further improvement, the upper displacement stage and the lower displacement stage are movably connected.

[0012] As a further improvement, the cylinder head is connected to the piston rod in the cylinder.

[0013] As a further improvement, the cylinder is also connected to an external air circuit system.

[0014] As a further improvement, the pneumatic system includes a gas source, a pressure regulating valve, and a solenoid valve.

[0015] As a further improvement, the cylinder head is positioned opposite to the push rod in the pressure switch.

[0016] As a further improvement, the cylinder support is detachably connected to the test base.

[0017] Compared with the prior art, this utility model achieves the following technical effects:

[0018] The device of this utility model adopts a modular design. The displacement stage base and the test base are connected by a U-shaped groove and a protrusion to achieve quick positioning and installation, which facilitates the adjustment of the installation position of the pressure switch. The displacement stage is divided into upper and lower parts, which are fixed by a screw knob, allowing the stroke of the pressure switch to be adjusted to meet the testing requirements of different models of pressure switches. The cylinder support and the test base are detachably connected, further enhancing the flexibility and maintenance convenience of the device.

[0019] The mounting base of this utility model can be equipped with multiple pressure switches, supporting simultaneous testing of multiple pressure switches, which can significantly shorten the testing cycle. The cylinder, through an external air circuit system, can drive the push rod of the pressure switch to reciprocate, which can efficiently simulate the fatigue state under actual working conditions and improve testing efficiency. The limiting baffle of this utility model abuts against the mounting base, effectively limiting the displacement range and avoiding deviation caused by vibration or load changes during the test, thus ensuring the accuracy of the test data.

[0020] This device solves the problems of poor adaptability and low efficiency of existing equipment through structural optimization and functional synergy, providing an efficient, reliable and flexible solution for fatigue testing of pressure switches, especially suitable for testing scenarios with multiple models and large quantities. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a side view of the structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the gas circuit system connection of this utility model.

[0024] Reference numerals in the attached diagram: 1. Test base; 2. Cylinder support; 3. Cylinder head; 4. Displacement stage base; 5. Mounting seat; 6. Limiting plate; 7. Cylinder; 8. Displacement stage; 9. Pressure switch; 10. Air source; 11. Pressure regulating valve; 12. Pressure gauge; 13. Two-position five-way solenoid valve. Detailed Implementation

[0025] The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Rather, the embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0026] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0027] See Figure 1 This utility model discloses a pressure switch fatigue testing device, comprising a test base 1, a cylinder support 2, a cylinder head 3, a displacement stage base 4, a mounting base 5, a cylinder 7, a displacement stage 8, and a pressure switch 9. The cylinder support 2 is fixed on the test base 1, the cylinder 7 is mounted on the cylinder support 2, the cylinder head 3 is connected to the cylinder 7, the displacement stage base 4 is fixed on the test base 1, the displacement stage 8 is mounted on the displacement stage base 4, the other end of the displacement stage 8 is connected to the mounting base 5, and at least one pressure switch 9 is provided on the mounting base 5.

[0028] See Figure 1 and Figure 2In this embodiment, the cylinder support 2 is installed at one end of the test base 1, and the displacement stage base 4 is installed at the other end of the test base 1. The test base 1 is a rectangular steel plate with a rust-proof surface and is made of Q235 carbon steel, which has high rigidity and resistance to deformation. M12 bolt holes are provided at the four corners of the base for fixing the whole device. The test base 1 is provided with protrusions, which are used to cooperate with the U-shaped groove of the displacement stage base 4 to realize positioning and installation position adjustment.

[0029] In this embodiment, the cylinder support 2 is a U-shaped structure. The cylinder support 2 is vertically fixed to the test base 1 by four bolts, which facilitates disassembly, replacement or maintenance. The top of the cylinder support 2 is provided with an opening for installing the cylinder 7 and the cylinder head 3.

[0030] In this embodiment, cylinder 7 is bolted to the top of cylinder support 2, and the piston rod end of cylinder 7 is connected to cylinder head 3. Figure 1 As shown, the cylinder head 3 has a cylindrical structure, is made of 45# steel, and is chrome-plated to enhance wear resistance. The front end of the cylinder head 3 has a hemispherical groove, the shape and size of which match the end of the push rod of the pressure switch 9. In use, when the piston rod extends, it pushes the cylinder head 3 towards the push rod of the pressure switch 9, compressing it. When the piston rod retracts, the push rod of the pressure switch 9 is reset by its internal spring, thus achieving the reciprocating motion of the push rod of the pressure switch 9 and enabling durability testing of the pressure switch.

[0031] The displacement stage base 4 in this embodiment has a rectangular structure with a U-shaped groove machined on the bottom. The U-shaped groove engages with the protrusion of the test base 1. The displacement stage 8 in this embodiment is divided into an upper displacement stage and a lower displacement stage. The lower displacement stage is fixed to the displacement stage base 4 by bolts. The upper displacement stage and the lower displacement stage are slidably connected. The top of the upper displacement stage is fixedly connected to the mounting base 5 by bolts. One end of the upper displacement stage is connected to a threaded knob. Rotating the threaded knob can adjust the position of the upper displacement stage 8, thereby adjusting the position of the pressure switch 9.

[0032] In this embodiment, the mounting base 5 is an L-shaped plate with multiple threaded holes evenly distributed on its surface. Each threaded hole supports the installation of a pressure switch 9. In this embodiment, there are 3 threaded holes, but it is not limited to this. Multiple threaded holes can be provided according to experimental needs. When installing the pressure switch 9 in the threaded hole, the push rod of the pressure switch 9 is set opposite to the cylinder head 3.

[0033] In this embodiment, the limiting baffle 6 is also an L-shaped plate. The limiting baffle 6 is fixed to the test base 1 by bolts, and one end abuts against the mounting base 5 to bear the force of the pressure switch 9 and prevent the displacement stage 8 from being damaged.

[0034] See Figure 3The pneumatic system of this embodiment includes an independent air source 10, a pressure regulating valve 11, and a two-position five-way solenoid valve 13. The air source 10 is used to provide gas with a certain pressure. The pressure regulating valve 11 is installed between the air source 10 and the two-position five-way solenoid valve 13 to regulate the gas pressure entering the pneumatic system, ensuring that the cylinder 7 works within a suitable pressure range, preventing damage to components due to excessive pressure or weak operation of the cylinder 7 due to excessively low pressure.

[0035] The two-position five-way solenoid valve 13 is used to control the direction of airflow. Its inlet is connected to the air source 10, and its two outlets are connected to the two air holes of the cylinder 7 respectively. When the two-position five-way solenoid valve 13 switches, the air coming out of the different outlets will push the piston rod of the cylinder 7 to reciprocate, thereby pressing the push rod of the pressure switch 9 to extend and retract.

[0036] In this embodiment, a pressure gauge 12 is also installed after the pressure regulating valve 11 to monitor the pressure in the gas path in real time.

[0037] During installation, mount the mounting base 5 onto the test base 1, ensuring a secure and accurate installation. (See attached image.) Figure 2 Install cylinder 7 and cylinder head 3 in the indicated positions. During installation, ensure that the connection between cylinder 7 and cylinder head 3 is tight to avoid installation deviations that may affect subsequent testing.

[0038] Install the displacement stage base 4 onto the test base 1, and use the U-shaped groove on the displacement stage base 4 for initial position adjustment to ensure that the displacement stage base 4 is installed horizontally and in the correct position. Then tighten the bolts to fix the displacement stage base 4. Install the displacement stage 8 onto the displacement stage base 4, and then install the mounting base 5 onto the displacement stage 8.

[0039] After the mounting base 5 is installed, fix the pressure switch 9 on the mounting base 5. At this time, the initial installation position of the pressure switch 9 can be fine-tuned by rotating the threaded knob on the displacement stage 8. During the fine-tuning process, a vernier caliper can be used to accurately measure the installation position of the pressure switch 9 to ensure that it meets the working requirements of the pressure switch 9. After the installation position of the pressure switch 9 is adjusted, the side of the limit stop 6 is tightly pressed against the side of the mounting base 5 and the bolts are tightened. This can prevent the displacement stage 8 from being displaced or damaged due to force during subsequent testing, and ensure the stability and accuracy of the test.

[0040] See Figure 3To connect the air circuit, ensure the air circuit system is operating normally during the connection process. During testing, connect pressure switch 9 to the feedback signal line and start the device. When the solenoid valve switches operation, cylinder 7 will reciprocate to push the pressure switch 9 push rod. During the test, the solenoid valve relay will count the number of compressions of the pressure switch 9 push rod, and the signal of pressure switch 9 itself will also participate in the counting. The signal of pressure switch 9 will be fed back to the solenoid valve control line in real time. When pressure switch 9 fails, the solenoid valve will immediately stop switching, and cylinder 7 will also stop operating, completing the pressure switch test.

[0041] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0042] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A pressure switch fatigue testing device, characterized in that, Includes test base, cylinder support, cylinder head, displacement stage base, mounting base, cylinder, displacement stage, and pressure switch; The cylinder support is fixed on the test base, the cylinder is installed on the cylinder support, the cylinder head is connected to the cylinder, the displacement stage base is fixed on the test base, the displacement stage is installed on the displacement stage base, the other end of the displacement stage is connected to the mounting base, and the mounting base is provided with at least one pressure switch.

2. The pressure switch fatigue testing device according to claim 1, characterized in that, It also includes a limiting stop plate, which is installed on the test base and one end abuts against the mounting seat to limit the movement of the mounting seat.

3. The pressure switch fatigue testing device according to claim 1, characterized in that, The bottom of the displacement stage base is provided with a U-shaped groove, which is adapted to the protrusion on the test base.

4. The pressure switch fatigue testing device according to claim 1, characterized in that, The displacement stage includes an upper displacement stage and a lower displacement stage, wherein the upper displacement stage is fixedly connected to the mounting base, and the lower displacement stage is connected to the displacement stage base.

5. The pressure switch fatigue testing device according to claim 4, characterized in that, The upper displacement stage and the lower displacement stage are movably connected.

6. The pressure switch fatigue testing device according to claim 1, characterized in that, The cylinder head is connected to the piston rod in the cylinder.

7. The pressure switch fatigue testing device according to claim 6, characterized in that, The cylinder is also connected to an external air system.

8. The pressure switch fatigue testing device according to claim 7, characterized in that, The gas system includes a gas source, a pressure regulating valve, and a solenoid valve.

9. The pressure switch fatigue testing device according to claim 6, characterized in that, The cylinder head is positioned opposite to the push rod in the pressure switch.

10. The pressure switch fatigue testing device according to claim 1, characterized in that, The cylinder support is detachably connected to the test base.

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