Press fitting device for electro-hydraulic servo valve nozzle

Abstract

The utility model relates to an electro-hydraulic servo valve nozzle press-fitting device, which comprises a measuring system used for monitoring the actual position of a nozzle pressed into a servo valve body on line; the press fitting tool comprises a hydraulic actuator, a displacement sensor and a tool base, a servo valve body is arranged on the tool base, the displacement sensor is used for detecting the moving position of a telescopic rod of the hydraulic actuator, and the telescopic rod of the hydraulic actuator is used for pressing the nozzle into the servo valve body. According to the electro-hydraulic servo valve nozzle press-fitting device, the nozzle can be pressed into a valve body through online monitoring, real-time displacement is fed back to the hydraulic actuator through the displacement sensor, and the position precision of the nozzle pressed into the valve body can be controlled and monitored in real time through combination of the hydraulic actuator, the displacement sensor and the high-precision imager. Therefore, labor cost is saved, efficiency is improved, and consistency of position precision is good.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic precision control components, and in particular to an electro-hydraulic servo valve nozzle press-fitting device. Background Technology

[0002] Electro-hydraulic servo valves are high-precision electro-hydraulic servo control components with high dynamic response, used in electro-hydraulic control systems. They can be used in precise hydraulic control systems for displacement, velocity, force, and acceleration. The nozzle assembly is the core control component of the electro-hydraulic servo valve, and the quality of its press-fit assembly plays a decisive role in the accuracy of the pre-stage and even the entire servo valve, as well as its various important performance parameters.

[0003] The positioning accuracy of the nozzle pressing into the servo valve body plays a crucial role in the final performance of the servo valve, but this positioning accuracy is difficult to control during the actual pressing process. Currently, the nozzle position is repeatedly adjusted manually, which not only results in low efficiency and a high rate of valve body scrap, but also poor consistency in positioning accuracy. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem in the prior art that workers need to repeatedly tap, measure, pull out, measure again, and tap again to press the nozzle into the appropriate position.

[0005] To address the aforementioned technical problems, this utility model provides an electro-hydraulic servo valve nozzle press-fitting device, comprising: a measuring system for online monitoring of the actual position of the nozzle pressed into the servo valve body; and a press-fitting fixture including a hydraulic actuator, a displacement sensor, and a fixture base. The fixture base is fixedly mounted on the measuring system, and the servo valve body is mounted on the fixture base. Both the hydraulic actuator and the displacement sensor are mounted on the fixture base. The displacement sensor detects the movement position of the hydraulic actuator's telescopic rod, which presses the nozzle into the servo valve body. This electro-hydraulic servo valve nozzle press-fitting device accurately presses the nozzle into the servo valve body, reducing repetitive steps and improving work efficiency. Furthermore, it effectively ensures the coaxiality of the servo valve body and the nozzle during the press-fitting process, improving assembly quality and meeting the requirements for automated nozzle press-fitting, making it suitable for mass production.

[0006] In one embodiment of this utility model, the measurement system includes a measuring machine, an image sensor, and a touch screen. The image sensor is mounted on the crossbeam of the measuring machine, and the tooling base is mounted on the worktable of the measuring machine and located directly below the image sensor. The touch screen is used to receive position information of the nozzle actually being pressed into the servo valve body.

[0007] In one embodiment of this utility model, the tooling base is flat, and tooling handles are connected to both opposite side walls of the tooling base.

[0008] In one embodiment of the present invention, a sensor mounting block is provided on the tooling base, a clamping block is connected to the sensor mounting block, the displacement sensor is disposed on the sensor mounting block, the clamping block is connected to the sensor mounting block, and the clamping block is used to limit the displacement sensor on the sensor mounting block.

[0009] In one embodiment of this utility model, both the clamping block and the sensor mounting block are rectangular blocks. The upper end face of the sensor mounting block is provided with an arc-shaped groove one, and the lower end face of the clamping block is provided with an arc-shaped groove two. The displacement sensor is placed in the integral groove formed by the arc-shaped groove one and the arc-shaped groove two.

[0010] In one embodiment of this utility model, the displacement sensor and the telescopic rod of the hydraulic actuator are arranged in the same direction of movement.

[0011] In one embodiment of this utility model, the tooling base is provided with a rectangular boss, the upper end of the rectangular boss is provided with a valve body placement groove, and the servo valve body is disposed in the valve body placement groove.

[0012] In one embodiment of this utility model, a pressing head is connected to the telescopic rod of the hydraulic actuator. The pressing head includes a connecting sleeve and a top head. A circular cavity is provided at the central axis position of the connecting sleeve. The connecting sleeve is sleeved on the telescopic rod of the hydraulic actuator. The top head and the end of the connecting sleeve away from the hydraulic actuator are fixedly connected. The hydraulic actuator drives the top head to press the nozzle into the valve body of the servo valve.

[0013] In one embodiment of this utility model, the top head is cylindrical, and the top head and the connecting sleeve are coaxially arranged. The diameter of the top head is smaller than the diameter of the connecting sleeve, and a transition conical surface is provided at the transition position between the top head and the connecting sleeve.

[0014] In one embodiment of this utility model, the pressure value of the hydraulic actuator is within 450 kgf.

[0015] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0016] The electro-hydraulic servo valve nozzle pressing device of this utility model can monitor the nozzle being pressed into the valve body online and feed back the real-time displacement to the hydraulic actuator through a displacement sensor. This achieves the actual forward distance display accuracy control within ±0.001mm and the precise pressing accuracy control within ±0.005mm. By combining hydraulic actuation, displacement sensor and high-precision imager, the positional accuracy of the nozzle being pressed into the valve body can be controlled and monitored in real time. This not only saves labor costs and improves efficiency, but also ensures good consistency of positional accuracy. Attached Figure Description

[0017] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the electro-hydraulic servo valve nozzle press-fitting device of this utility model;

[0019] Figure 2 This is a schematic diagram of the pressing tool of this utility model;

[0020] Figure 3 This is a structural schematic diagram of the tooling base of this utility model;

[0021] Figure 4 This is a partial structural schematic diagram of the tooling base of this utility model;

[0022] Figure 5 This is a schematic diagram of the pressing head of this utility model.

[0023] Explanation of reference numerals in the accompanying drawings: Measurement system 1, Measurement platform 11, Image sensor 12, Touch screen 13, Press fitting fixture 2, Hydraulic actuator 21, Displacement sensor 22, Fixture base 23, Rectangular boss 231, Valve body placement groove 232, Spherical groove 233, Fixture handle 24, Sensor mounting block 25, Arc groove one 251, Clamping block 26, Arc groove two 261, Press fitting head 27, Connecting sleeve 271, Top head 272, Servo valve body 10, Nozzle 20. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0025] Reference Figure 1 , 2As shown, the electro-hydraulic servo valve nozzle pressing device of this utility model includes: a measurement system 1, which is used to monitor online the actual position of the nozzle 20 pressed into the servo valve body 10; and a pressing fixture 2, which includes a hydraulic actuator 21, a displacement sensor 22, and a fixture base 23. The fixture base 23 is fixedly mounted on the measurement system 1, and the servo valve body 10 is mounted on the fixture base 23. The hydraulic actuator 21 and the displacement sensor 22 are both mounted on the fixture base 23. The displacement sensor 22 is used to detect the movement position of the telescopic rod of the hydraulic actuator 21. The displacement sensor 22 is arranged in the same direction as the movement direction of the telescopic rod of the hydraulic actuator 21. The telescopic rod of the hydraulic actuator 21 is used to press the nozzle 20 into the servo valve body 10.

[0026] In the above structure, the measurement system 1 includes a measuring machine 11, an image instrument 12, and a touch screen 13. The image instrument 12 is mounted on the crossbeam of the measuring machine 11, and the tooling base 23 is mounted on the worktable of the measuring machine 11, with the tooling base 23 located directly below the image instrument 12. The touch screen 13 is used to receive the position information of the nozzle 20 actually being pressed into the servo valve body 10.

[0027] Reference Figure 3 As shown, the tooling base 23 is flat, and tooling handles 24 are connected to two opposite side walls of the tooling base 23. A sensor mounting block 25 is provided on the tooling base 23, and a clamping block 26 is connected to the sensor mounting block 25. The displacement sensor 22 is mounted on the sensor mounting block 25. The clamping block 26 is connected to the sensor mounting block 25 and is used to confine the displacement sensor 22 on the sensor mounting block 25. Both the clamping block 26 and the sensor mounting block 25 are rectangular blocks. The upper end face of the sensor mounting block 25 has a first arc-shaped groove 251, and the lower end face of the clamping block 26 has a second arc-shaped groove 261. The displacement sensor 22 is placed within the integral groove formed by the first arc-shaped groove 251 and the second arc-shaped groove 261.

[0028] Reference Figure 4 As shown, the tooling base 23 is provided with a rectangular boss 231, and the upper end of the rectangular boss 231 is provided with a valve body placement groove 232. The servo valve body 10 is disposed in the valve body placement groove 232. The valve body placement groove 232 is a rectangular groove, and each of the four corners of the valve body placement groove 232 is provided with a spherical groove 233. The four corners of the servo valve body 10 are respectively disposed in the spherical grooves 233.

[0029] Reference Figure 5As shown, a press-fit head 27 is connected to the telescopic rod of the hydraulic actuator 21. The press-fit head 27 includes a connecting sleeve 271 and a top head 272. A circular cavity is provided at the central axis position of the connecting sleeve 271. The connecting sleeve 271 is sleeved on the telescopic rod of the hydraulic actuator 21. The top head 272 and the end of the connecting sleeve 271 away from the hydraulic actuator 21 are fixedly connected. The hydraulic actuator 21 drives the top head 272 to press the nozzle 20 into the servo valve body 10.

[0030] In the above structure, the top head 272 is cylindrical, and the top head 272 and the connecting sleeve 271 are coaxially arranged. The diameter of the top head 272 is smaller than the diameter of the connecting sleeve 271, and a transition conical surface is provided at the transition position between the top head 272 and the connecting sleeve 271.

[0031] In the above structure, the pressure value of the hydraulic actuator 21 is within 450 kgf.

[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A nozzle press-fitting device for an electro-hydraulic servo valve, characterized in that, include: A measurement system is used to monitor online the actual position of the nozzle pressed into the servo valve body; The press-fitting fixture includes a hydraulic actuator, a displacement sensor, and a fixture base. The fixture base is fixedly mounted on the measurement system, and a servo valve body is mounted on the fixture base. Both the hydraulic actuator and the displacement sensor are mounted on the fixture base. The displacement sensor is used to detect the movement position of the extension rod of the hydraulic actuator, and the extension rod of the hydraulic actuator is used to press the nozzle into the servo valve body.

2. The electro-hydraulic servo valve nozzle press-fitting device according to claim 1, characterized in that: The measurement system includes a measuring machine, an image sensor, and a touch screen. The image sensor is mounted on the crossbeam of the measuring machine, and the tooling base is mounted on the worktable of the measuring machine, with the tooling base located directly below the image sensor. The touch screen is used to receive position information of the nozzle actually being pressed into the servo valve body.

3. The electro-hydraulic servo valve nozzle press-fitting device according to claim 1, characterized in that: The tooling base is flat, and tooling handles are connected to the two opposite side walls of the tooling base.

4. The electro-hydraulic servo valve nozzle press-fitting device according to claim 1, characterized in that: The tooling base is provided with a sensor mounting block, and a clamping block is connected to the sensor mounting block. The displacement sensor is mounted on the sensor mounting block, and the clamping block is connected to the sensor mounting block. The clamping block is used to limit the displacement sensor on the sensor mounting block.

5. The electro-hydraulic servo valve nozzle press-fitting device according to claim 4, characterized in that: Both the clamping block and the sensor mounting block are rectangular blocks. The upper end face of the sensor mounting block is provided with an arc-shaped groove one, and the lower end face of the clamping block is provided with an arc-shaped groove two. The displacement sensor is placed in the integral groove formed by the arc-shaped groove one and the arc-shaped groove two.

6. The electro-hydraulic servo valve nozzle press-fitting device according to claim 1, characterized in that: The displacement sensor is positioned in the same direction as the telescopic rod of the hydraulic actuator.

7. The electro-hydraulic servo valve nozzle press-fitting device according to claim 1, characterized in that: The tooling base is provided with a rectangular boss, and the upper end of the rectangular boss is provided with a valve body placement groove, and the servo valve body is placed in the valve body placement groove.

8. The electro-hydraulic servo valve nozzle press-fitting device according to claim 1, characterized in that: A press-fit head is connected to the telescopic rod of the hydraulic actuator. The press-fit head includes a connecting sleeve and a top head. A circular cavity is provided at the central axis of the connecting sleeve. The connecting sleeve is sleeved on the telescopic rod of the hydraulic actuator. The top head and the end of the connecting sleeve away from the hydraulic actuator are fixedly connected. The hydraulic actuator drives the top head to press the nozzle into the servo valve body.

9. The electro-hydraulic servo valve nozzle press-fitting device according to claim 8, characterized in that: The top head is cylindrical and is coaxially arranged with the connecting sleeve. The diameter of the top head is smaller than the diameter of the connecting sleeve, and a transition conical surface is provided at the transition position between the top head and the connecting sleeve.

10. The electro-hydraulic servo valve nozzle press-fitting device according to claim 1, characterized in that: The pressure value of the hydraulic actuator is within 450 kgf.

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