An automatic press-fitting device for multi-displacement solenoid valves

Abstract

This utility model relates to the field of solenoid valve testing and press-fitting technology, and discloses an automatic press-fitting device for multi-displacement solenoid valves. It includes a structural frame for limiting the installation of various components and a drive mechanism. The drive mechanism includes a pneumatic drive mechanism and an electric drive mechanism used in conjunction. The structural frame has pneumatic locking mechanisms on both sides of the testing fixture for locking and limiting the electric drive mechanism. The bottom of the testing fixture has a pneumatic wiring mechanism for energizing and testing the solenoid valve. The device utilizes the rapid stroke characteristic of a pneumatic cylinder to achieve a rapid response to invalid displacement during the press-fitting process, and then utilizes the precise displacement and controllable pressure advantages of an electric cylinder to achieve final press-fitting. This mechanism combines the advantages of both pneumatic and electric cylinder press-fitting methods, applying both structural methods simultaneously for press-fitting. It can quickly achieve press-fitting and adjust and control the pressure output and feedback in real time, improving press-fitting efficiency and providing stable pressure.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve testing and press-fitting technology, specifically to an automatic press-fitting device for multi-displacement electromagnetic valves. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices, fundamental components of automation systems used to control fluids. They are actuators, not limited to hydraulic or pneumatic systems. Used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, ensuring both precision and flexibility. There are many types of solenoid valves, each playing a different role in the control system. The most common types are check valves, safety valves, directional control valves, and speed control valves.

[0003] After the solenoid valve is manufactured, it needs to be tested for performance. During the performance test, the solenoid valve is usually installed in the test fixture and then oil is introduced. The valve body performance is checked by adjusting the pressure and flow parameters of the oil. The oil pressure can reach up to 10MPa during the test, so the safety and stability of the test fixture are particularly important.

[0004] Conventional testing equipment typically employs electric, pneumatic, or mechanical limiting methods to perform pressure testing on solenoid valves. The electric method uses the torque of a servo motor to convert it into linear thrust through a lead screw transmission. The pneumatic method uses the thrust generated by compressed gas, applying both types of thrust directly to the valve body shell to ensure the safety and pressure conditions required for the test. The mechanical limiting method uses external structural components to constrain the valve body shell, thereby achieving the same pressure testing effect as the pneumatic and electric methods.

[0005] In current testing facilities, an additional clearance stroke is designed because material loading requires clearance space. This clearance stroke is ineffective for press fitting. The longer the solenoid valve being tested, the greater the required stroke. If a single-stroke electric press fitting is used, the time required will be longer. Although a single-stroke pneumatic press fitting can be completed quickly, it has the fatal flaw of unstable pressure. Therefore, further improvements are needed. Utility Model Content

[0006] To address the technical challenge of achieving rapid press-fitting and improved testing efficiency while simultaneously adjusting control pressure output and feedback in real-time during solenoid valve testing, this invention provides the following technical solution: an automatic press-fitting device for multi-displacement solenoid valves, comprising a structural frame for limiting the installation of various components and a drive mechanism. The drive mechanism includes a pneumatic drive mechanism and an electric drive mechanism used in conjunction. The bottom of the electric drive mechanism is equipped with a press-fitting head for press-fitting the solenoid valve. The lower limit is the end of the downward displacement of the electric drive mechanism. A test fixture for positioning the solenoid valve and a fixture plate is located directly below the electric drive mechanism. A position detection sensor for detecting whether the solenoid valve is within the fixture is installed on the structural frame corresponding to the test fixture. Pneumatic locking mechanisms for locking and limiting the electric drive mechanism are located on both sides of the structural frame on the test fixture. Buffers are fixedly installed on both sides of the bottom of the electric drive mechanism by limit bolts. A pneumatic wiring mechanism for energizing the solenoid valve is located on the bottom side of the test fixture. A proximity sensor for detecting whether the electric drive mechanism has reached the lower limit is located on one side of the bottom of the structural frame.

[0007] As an optimization, the pneumatic drive mechanism includes a linear guide rail and a drive cylinder. Both the linear guide rail and the drive cylinder are fixedly installed on one side of the back of the structural frame. A slider is slidably connected inside the linear guide rail, and the electric drive mechanism is installed on the slider. The end of the cylinder rod of the drive cylinder is connected to the electric drive mechanism. By driving the drive cylinder and the linear guide rail, the electric drive mechanism can achieve rapid and stable rising and falling.

[0008] As an optimization, the electric drive mechanism includes a servo motor, a planetary reducer, a ball screw, and a pressure sensor. The planetary reducer is located at the bottom of the servo motor. The ball screw and the output shaft of the servo motor are fixedly connected by a coupling. A locking plate that works in conjunction with a pneumatic locking mechanism is fixedly installed at the bottom of the electric drive mechanism to achieve precise pressure stroke of the test head and provide adjustable constant pressure output and feedback.

[0009] As an optimization, the pneumatic locking mechanism includes a locking seat, a locking bolt, a locking cylinder, and a trigger sensor. The locking seat is located directly below the locking plate. The locking bolt, used for through-hole locking and limiting the locking plate, is movably inserted into the locking seat. A locking cylinder for driving the locking bolt is fixedly installed on one side of the front of the locking seat. A trigger sensor is provided at the locking cylinder. The trigger sensor detects whether the locking plate is inserted into the locking seat. After triggering, the locking bolt can be driven to penetrate the locking plate and insert into the locking seat, thus achieving the locking and limiting function.

[0010] As an optimization, the pneumatic wiring mechanism includes a slide cylinder, a positioning pin, an elastic probe, and an elastic clamp. The positioning pin is used to install the tooling plate, which enables the solenoid valve coil to be quickly energized, improving testing efficiency and stability.

[0011] As an optimization, the in-situ detection sensor is a diffuse reflection photoelectric sensor, used to detect whether the test object exists in the test fixture.

[0012] As an optimization, the proximity sensor is a capacitive sensor used to detect whether the electric drive mechanism has reached the corresponding position.

[0013] The beneficial effects of this utility model are:

[0014] This multi-displacement solenoid valve automatic pressing device utilizes the rapid stroke characteristic of a pneumatic cylinder to quickly respond to invalid displacements during the pressing process, and then leverages the precise displacement and controllable pressure of an electric cylinder to achieve final pressing. This mechanism combines the advantages of both pneumatic and electric cylinder pressing methods, employing both structural approaches simultaneously. It achieves rapid pressing while allowing real-time adjustment and control of pressure output and feedback, thus improving pressing efficiency and providing stable pressure to ensure consistent testing conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the driving structure of this utility model;

[0017] Figure 3 This is a cross-sectional schematic diagram of the drive structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the pneumatic locking structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the test fixture structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the pneumatic wiring structure of this utility model.

[0021] In the diagram: 1. Structural frame; 2. Pneumatic drive mechanism; 21. Linear guide rail; 22. Drive cylinder; 3. Electric drive mechanism; 31. Servo motor; 32. Planetary reducer; 33. Ball screw; 34. Pressure sensor; 35. Coupling; 36. Locking plate; 4. Test fixture; 5. In-situ detection sensor; 6. Pneumatic locking mechanism; 61. Locking seat; 62. Locking bolt; 63. Locking cylinder; 64. Trigger sensor; 7. Limit bolt; 8. Buffer; 9. Pneumatic wiring mechanism; 91. Slide cylinder; 92. Positioning pin; 93. Elastic probe; 10. Sensor. Detailed Implementation

[0022] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 An automatic press-fitting device for a multi-displacement solenoid valve includes a structural frame 1 for limiting the installation of various components and a drive mechanism. The drive mechanism includes a pneumatic drive mechanism 2 and an electric drive mechanism 3 used in conjunction. The bottom of the electric drive mechanism 3 is provided with a press-fitting head for pressing the solenoid valve. The lower limit is the end of the downward displacement of the electric drive mechanism 3. A test fixture 4 for positioning the solenoid valve and the fixture plate is provided directly below the electric drive mechanism 3. A position detection sensor 5 for detecting whether the solenoid valve is in the fixture is provided on the structural frame 1 corresponding to the test fixture 4. Pneumatic locking mechanisms 6 for locking and limiting the electric drive mechanism 3 are provided on both sides of the structural frame 1 located on the test fixture 4. Buffers 8 are fixedly installed on both sides of the bottom of the electric drive mechanism 3 by limiting bolts 7. A pneumatic wiring mechanism 9 for energizing and testing the solenoid valve is provided on the bottom side of the test fixture 4. A proximity sensor 10 for detecting whether the electric drive mechanism 3 has reached the lower limit is provided on one side of the bottom of the structural frame 1.

[0025] Please see Figure 2-3The pneumatic drive mechanism 2 includes a linear guide rail 21 and a drive cylinder 22. The linear guide rail 21 and the drive cylinder 22 are both fixedly installed on the back side of the structural frame 1. A slider is slidably connected inside the linear guide rail 21, and the electric drive mechanism 3 is installed on the slider. The end of the cylinder rod of the drive cylinder 22 is connected to the electric drive mechanism 3. By driving the drive cylinder 22 and the linear guide rail 21, the electric drive mechanism 3 can be rapidly and stably raised and lowered.

[0026] Please see Figure 2-3 The electric drive mechanism 3 includes a servo motor 31, a planetary reducer 32, a ball screw 33, and a pressure sensor 34. The planetary reducer 32 is located at the bottom of the servo motor 31. The ball screw 33 and the output shaft of the servo motor 31 are fixedly connected by a coupling 35. A locking plate 36 is fixedly installed at the bottom of the electric drive mechanism 3 for locking in conjunction with the pneumatic locking mechanism 6. The pressure sensor 34 detects the thrust of the electric cylinder pressing and can convert the pressure value into an analog signal. After the system collects the data, it is displayed on the operation interface, which can realize the precise stroke of the test head pressing down and provide adjustable constant pressure output and feedback.

[0027] Please see Figure 4 The pneumatic locking mechanism 6 includes a locking seat 61, a locking bolt 62, a locking cylinder 63, and a trigger sensor 64. The locking seat 61 is located directly below the locking plate 36. The locking bolt 62, which is used to lock and limit the locking plate 36, is movably inserted into the locking seat 61. The locking cylinder 63, which drives the locking bolt 62, is fixedly installed on one side of the front of the locking seat 61. The trigger sensor 64 is set at the locking cylinder 63. During the test, the pneumatic drive mechanism 2 and the electric drive mechanism 3 will be subjected to the hydraulic reaction force of the workpiece. After the pneumatic drive mechanism 2 is pressed down into place, the locking cylinder 63 inserts the planetary reducer 32 into the locking plate 36 inside the locking seat 61, and then the electric drive mechanism 3 presses the workpiece tightly. At this time, the pneumatic locking mechanism 6 can provide a stable locking function to prevent the electric drive mechanism 3 from being displaced and affecting the test performance.

[0028] Please see Figure 5-6 The pneumatic wiring mechanism 9 includes a slide cylinder 91, a positioning pin 92, an elastic probe 93, and an elastic clamp. The positioning pin 92 is used to install the tooling plate. By activating the slide cylinder 91, the elastic probe 93 can be brought into contact with the mating part on the tooling plate. The other end of the elastic probe 93 is connected to the power supply. The mating part on the tooling plate is connected to the coil terminal of the solenoid valve, thereby enabling the solenoid valve coil to be quickly energized, improving testing efficiency and stability.

[0029] Under the above-mentioned typical test conditions, the movement speed of the cylinder rod is generally 300-500 mm / s, and the movement speed of the low-speed, high-load electric drive mechanism 3 is generally 5-10 mm / s. Therefore, we can first use the cylinder to quickly complete the above-mentioned ineffective pressing displacement, and then use the electric cylinder to complete the end displacement of the pressing.

[0030] Two-stage displacement:

[0031] The first segment is pneumatic displacement, which is the aforementioned ineffective press-fit displacement, determined by the length of the solenoid valve, typically 200-300mm.

[0032] The second stage is the end displacement of the press fitting, with a typical stroke of about 10-20mm.

[0033] Multi-stage displacement: When the solenoid valve is particularly long or in a special installation environment where a large avoidance displacement is required, we can add cylinders and stack them. When multiple cylinders act simultaneously, a faster displacement can be achieved, thereby improving the pressing efficiency.

[0034] In the two pressing schemes mentioned above: the first stage of displacement can also be replaced by hydraulic drive. When a larger stroke is required, more stages of displacement can be used to achieve rapid pressing.

[0035] Hydraulic drive: This includes a hydraulic station, hydraulic cylinder, and control components, which can control the reciprocating linear motion of the hydraulic rod to replace the motion of the pneumatic cylinder.

[0036] Hydraulic drive and pneumatic drive operate on the same principle, but use different media: compressed liquid and compressed gas, respectively.

[0037] Compressed liquids provide high pressure, making them suitable for heavy-duty applications;

[0038] Compressed gas provides lower pressure and is suitable for light loads.

[0039] Multi-stroke: When long-stroke pressing is required under special environmental conditions, multi-stage drives can be superimposed and synchronous control can be used to reduce the action time required for long strokes, thereby improving work efficiency.

[0040] Working principle: First, the solenoid valve to be tested and its tooling plate are placed on the test tooling 4 by manual or robotic arm, and fixed and positioned by positioning pin 92. Then, the test part is detected by the in-position detection sensor 5, and then the drive cylinder 22 is activated, so the electric drive mechanism 3 is quickly pushed down to the lower limit. At this time, the buffer 8 can prevent hard collision from causing vibration or damaging parts.

[0041] When the electric drive mechanism 3 reaches the lower limit, the proximity sensor 10 detects that the electric drive mechanism 3 has reached the current position. The trigger judgment is in place, so the locking cylinders 63 on both sides of the bottom will be activated, pushing the locking bolt 62 into the locking seat 61. At this time, the electric drive mechanism 3 will be limited and unable to move upward. After the magnetic sensor on the right end of the locking cylinder 63 detects the position of the piston rod of the drive cylinder 22, the servo motor 31 of the electric drive mechanism 3 will rotate in reverse. Then, the speed will be reduced by the planetary reducer 32 and the torque will be amplified. Then, the rotational motion will be converted into linear motion by the anti-rotation positioning of the ball screw 33 nut. The pressure sensor 34 detects the pressing force of the electric cylinder and converts the pressure value into an analog signal. The system collects the data and displays it on the operation interface for feedback. The pressure value between the pressing head and the solenoid valve housing can be set arbitrarily.

[0042] Reactivating the pneumatic wiring mechanism 9 causes the slide cylinder 91 to actuate, which brings the elastic probe 93 into contact with the mating part on the tooling plate. The other end of the elastic probe 93 is connected to the power supply, and the mating part on the tooling plate is connected to the coil terminal of the solenoid valve. At this time, the coil of the solenoid valve will be energized, and then the solenoid valve can be tested.

[0043] In summary, this multi-displacement solenoid valve automatic pressing device utilizes the rapid stroke characteristic of a pneumatic cylinder to achieve a quick response to invalid displacements during the pressing process, and then leverages the precise displacement and controllable pressure of an electric cylinder to achieve final pressing. This mechanism combines the advantages of both pneumatic and electric cylinder pressing methods, employing both structural approaches simultaneously. It enables rapid pressing while allowing real-time adjustment and control of pressure output and feedback, thus improving pressing efficiency and providing stable pressure to ensure consistent testing conditions.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings.

[0046] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A multi-displacement solenoid valve automatic press-fitting device, comprising a structural frame (1) for positioning and mounting each component and a driving mechanism, characterized in that: The drive mechanism includes a pneumatic drive mechanism (2) and an electric drive mechanism (3) used in conjunction. The bottom of the electric drive mechanism (3) is provided with a press head for press-fitting the solenoid valve. The lower limit is the end of the downward displacement of the electric drive mechanism (3). A test fixture (4) for positioning the solenoid valve and the tooling plate is provided directly below the electric drive mechanism (3). A position detection sensor (5) for detecting whether the solenoid valve is in the tooling is provided on the structural frame (1) corresponding to the test fixture (4). A pneumatic locking mechanism (6) for locking and limiting the electric drive mechanism (3) is provided on both sides of the structural frame (1) located on the test fixture (4). A buffer (8) is fixedly installed on both sides of the bottom of the electric drive mechanism (3) by a limit bolt (7). A pneumatic wiring mechanism (9) for energizing the solenoid valve is provided on the bottom side of the test fixture (4). A proximity sensor (10) for detecting whether the electric drive mechanism (3) has reached the lower limit is provided on one side of the bottom of the structural frame (1).

2. The multi-displacement solenoid valve automatic press-fit device according to claim 1, characterized in that: The pneumatic drive mechanism (2) includes a linear guide rail (21) and a drive cylinder (22). The linear guide rail (21) and the drive cylinder (22) are both fixedly installed on the back side of the structural frame (1). A slider is slidably connected inside the linear guide rail (21), and the electric drive mechanism (3) is installed on the slider. The end of the cylinder rod of the drive cylinder (22) is connected to the electric drive mechanism (3).

3. The multi-displacement solenoid valve automatic press-fit device according to claim 2, characterized in that: The electric drive mechanism (3) includes a servo motor (31), a planetary reducer (32), a ball screw (33), and a pressure sensor (34). The planetary reducer (32) is located at the bottom of the servo motor (31). The ball screw (33) and the output shaft of the servo motor (31) are fixedly connected by a coupling (35). A locking plate (36) is fixedly installed at the bottom of the electric drive mechanism (3) for locking in conjunction with the pneumatic locking mechanism (6).

4. The multi-displacement solenoid valve automatic press-fit device according to claim 3, characterized in that: The pneumatic locking mechanism (6) includes a locking seat (61), a locking bolt (62), a locking cylinder (63), and a trigger sensor (64). The locking seat (61) is located directly below the locking plate (36). The locking bolt (62) for locking and limiting the locking plate (36) is movably inserted into the locking seat (61). The locking cylinder (63) for driving the locking bolt (62) is fixedly installed on one side of the front of the locking seat (61). The trigger sensor (64) is provided at the locking cylinder (63).

5. The multi-displacement solenoid automatic press-fit device according to claim 1, characterized in that: The pneumatic wiring mechanism (9) includes a slide cylinder (91), a positioning pin (92), an elastic probe (93), and an elastic clamp. The positioning pin (92) is used to install the tooling plate.

6. The multi-displacement solenoid valve automatic press-fit device according to any one of claims 1-5, characterized in that: The in-situ detection sensor (5) is a diffuse reflection photoelectric sensor.

7. The multi-displacement solenoid valve automatic press-fit device according to any one of claims 1-5, characterized in that: The proximity sensor (10) is a capacitive sensor.

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