An actuator piston hydraulic positioning clamping device

Abstract

This invention belongs to the field of actuator piston positioning technology, specifically a hydraulic positioning and clamping device for actuator pistons, including a positioning base; one end of the positioning base is fixedly connected to a main oil connector, which can be connected to an external oil pump; an oil distributor is fixedly connected to the main oil connector, and the oil distributor is located inside the positioning base; the device achieves hydraulic clamping and positioning of the actuator piston through four clamping rods. When processing pistons of the same specification, the oil distributor assembly can finely adjust the hydraulic oil volume, allowing the clamping rods to be temporarily loosened to observe the overall state of the piston, and then reset and clamped after observation; when changing to pistons of different specifications, the oil pump draws back the original hydraulic oil and re-injects it to match the clamping requirements of the new specification. This not only allows for flexible adjustment of clamping force according to the processing state, reduces clamping deformation and ensures processing accuracy, but also automatically guides the offset piston to the center through the synchronous closing action of the clamping rods, thereby further improving the accuracy of positioning and processing.

Description

Technical Field

[0001] This invention belongs to the field of actuator piston positioning technology, specifically an actuator piston hydraulic positioning and clamping device. Background Technology

[0002] The actuator piston is the core load-bearing component in industrial actuators. It is mostly a piston-type irregular structure with multiple sealing ring grooves on the top for internal cylinder sealing. The skirt is designed with heat dissipation grooves and piston pin holes. The whole structure is thin-walled and needs to reciprocate within the cavity to transmit pressure energy and drive the mechanism. It has high requirements for machining accuracy, form and position tolerances and structural strength. It is a key component to ensure the sealing performance and operational reliability of the actuator.

[0003] Traditional actuator piston positioning and clamping devices are mostly manual tools, with manual operation as the core. They typically use manual wrenches to tighten bolts and pressure plates to clamp the workpiece, along with simple positioning pins to achieve workpiece positioning. They rely on the worker's experience to control the clamping force, resulting in problems such as low clamping efficiency, poor consistency of clamping force, easy deformation of thin-walled pistons, and unstable positioning accuracy.

[0004] With the development of technology, hydraulic positioning and clamping devices for actuator pistons have emerged, using hydraulic power to replace manual clamping. These devices limit the piston axially and radially through fixed positioning seats, positioning pins, and pressure plates, and rely on hydraulic cylinders to provide constant clamping force. Although existing hydraulic positioning and clamping devices for actuator pistons are more stable and labor-saving than manual clamping, their overall structure is simple and lacks versatility. They are usually suitable for pistons of a single specification and cannot adapt the clamping force to different specifications of pistons according to the processing conditions. Consequently, deformation can easily occur during the clamping process of the actuator piston, which can damage the machining accuracy of the workpiece.

[0005] Therefore, the present invention provides a hydraulic positioning and clamping device for an actuator piston. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides an actuator piston hydraulic positioning and clamping device, comprising a positioning base; a main oil connector is fixedly connected to one end of the positioning base, and the main oil connector can be externally connected to an oil pump; an oil distributor is fixedly connected to the main oil connector, and the oil distributor is located inside the positioning base; a main oil pipe is fixedly connected between the main oil connector and the oil distributor; four hydraulic cylinders are fixedly connected to the oil distributor via a solenoid valve; a sliding seat is fixedly connected to the output end of the hydraulic cylinder; a clamping rod is fixedly connected to the sliding seat; and an oil distribution assembly is provided on the main oil connector, which is used to control the position of the four clamping rods by supplying oil.

[0008] Preferably, the oil distribution assembly includes an oil distribution tank and an electric cylinder; the oil distribution tank is fixedly connected to the main oil connector via a second solenoid valve, and the oil distribution tank is fixedly connected to the outside of the positioning base; the electric cylinder is fixedly connected to the main oil connector, and the output end of the electric cylinder is located inside the oil distribution tank.

[0009] Preferably, an inner support seat is fixedly connected to the oil distributor via a No. 3 solenoid valve; four sliding plates are slidably connected inside the inner support seat; and an inner support block is fixedly connected to one end of each sliding plate.

[0010] Preferably, four rotating rollers are rotatably connected to the clamping rod via torsion springs, and the four rotating rollers are arranged in pairs facing each other; a clamping plate is fixed to the rotating roller, and the cross-sectional shape of the clamping plate is set as an arc.

[0011] Preferably, a guide rod is fixedly connected to the top of the clamping rod, and the top surface of the guide rod is set as an inclined surface; a first rubber block is fixedly connected to the clamping plate, and the first rubber block is attached to the side of the clamping plate near the first hydraulic cylinder; a second rubber block is fixedly connected to the end of the inner support block away from the sliding plate.

[0012] Preferably, a fixing frame is fixedly connected to the positioning base near the main oil connector; a pressing plate is slidably connected to the inner wall of the fixing frame via a first electric slider, and the cross-sectional shape of the pressing plate is set to L-shape; a connecting component is provided on the fixing frame, which is used to move the four clamping rods away from the workpiece when the pressing plate presses the workpiece.

[0013] Preferably, the connecting assembly includes an oil storage box and an oil pipe; the oil storage box is fixedly connected to the fixed frame, and an oil pressure plate is provided on the pressure plate, the oil pressure plate being slidably connected inside the oil storage box; an oil pipe is fixedly connected between the oil storage box and the main oil connector, and a solenoid valve is installed at the connection between the oil pipe and the main oil connector.

[0014] Preferably, a limiting plate is fixedly connected to the pressing plate, and the limiting plate has multiple limiting grooves; a rotating rod is rotatably connected to the limiting plate; a pressing block is fixedly connected to the bottom end of the rotating rod; a limiting block is sleeved on the rotating rod, and the limiting block can be engaged in one of the limiting grooves of the limiting plate; a threaded sleeve is threadedly connected to the rotating rod, and the threaded sleeve is located above the limiting block.

[0015] Preferably, a second hydraulic cylinder is fixedly connected to the fixed frame; a second oil pipe is fixedly connected between the second hydraulic cylinder and the oil distribution tank and the oil storage box, and a fifth solenoid valve is installed at the connection between the second oil pipe and the oil distribution tank; two sliding clamps are slidably connected to the fixed frame, and the two sliding clamps are arranged opposite to each other, with one sliding clamp fixedly connected to the output end of the second hydraulic cylinder; a gear is rotatably connected to the fixed frame, and the gear can mesh with the two sliding clamps.

[0016] Preferably, a fixing plate is fixedly connected to the sliding clamp plate; multiple clamping plates are fixedly connected to the fixing plate, and the cross-sectional shape of the clamping plates is set to V-shape; a No. 3 rubber block is fixedly connected to the side of the clamping plate away from the fixing plate.

[0017] The beneficial effects of this invention are as follows: 1. The present invention discloses a hydraulic positioning and clamping device for an actuator piston. This device achieves hydraulic clamping and positioning of the actuator piston through four clamping rods. When machining pistons of the same specification, the oil distribution component can finely adjust the hydraulic oil volume to briefly loosen the clamping rods to observe the overall state of the piston. After observation, the clamping is reset. When changing to pistons of different specifications, the oil pump draws back the original hydraulic oil and re-injects it to match the clamping requirements of the new specification. This not only allows for flexible adjustment of clamping force according to the machining state, reduces clamping deformation and ensures machining accuracy, but also automatically guides the offset piston to the center through the synchronous closing action of the clamping rods, thereby further improving the accuracy of positioning and machining.

[0018] 2. The actuator piston hydraulic positioning and clamping device of the present invention achieves flexible adjustment of the clamping force and position of the actuator piston through the coordinated control of an oil pump, an electric cylinder, and a solenoid valve. Before processing, the oil pump injects oil to open the clamping rod, and after the piston is placed in, the electric cylinder draws back the hydraulic oil to position and clamp it. When observation is required during processing, the electric cylinder squeezes a small amount of hydraulic oil to finely loosen the designated clamping rod, partially exposing the piston for inspection. When a piston of the same specification is unloaded, the electric cylinder completely drains the oil to reset the clamping rod. When changing specifications, the oil pump first empties the original hydraulic oil and then re-injects the appropriate amount of oil according to the new specification. This oil distribution component design can flexibly control the loosening range and degree of the clamping rod according to the processing stage and requirements, which is not only convenient for observation and improves processing accuracy and efficiency, but also can quickly adapt to the positioning and clamping requirements of different specifications of pistons, and has good versatility and flexibility. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the inner support structure in this invention; Figure 3 This is a schematic diagram of the oil distribution tank in this invention; Figure 4 This is a schematic diagram of the oil separator in this invention; Figure 5 This is a schematic diagram of the sliding plate in this invention; Figure 6 This is a schematic diagram of the limiting block in this invention.

[0021] In the diagram: 1. Positioning base; 11. Main oil connector; 12. Main oil pipe; 13. Oil distributor; 14. Hydraulic cylinder No. 1; 15. Sliding seat; 16. Clamping rod; 2. Oil distribution tank; 21. Electric cylinder; 3. Inner support seat; 31. Sliding plate; 32. Inner support block; 4. Rotating roller; 41. Clamping plate; 5. Guide rod; 51. Rubber block No. 1; 52. Rubber block No. 2; 6. Fixing frame; 61. Pressing plate; 7. Oil storage box; 71. Oil pipe No. 1; 8. Limiting plate; 81. Rotating rod; 82. Pressing block; 83. Limiting block; 84. Threaded sleeve; 9. Oil pipe No. 2; 91. Hydraulic cylinder No. 2; 92. Sliding clamping plate; 93. Gear; 94. Fixing plate; 95. Clamping plate; 96. Rubber block No. 3. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 5 As shown in the embodiment of the present invention, a hydraulic positioning and clamping device for an actuator piston includes a positioning base 1; one end of the positioning base 1 is fixedly connected to a main oil connector 11, and the main oil connector 11 can be externally connected to an oil pump; an oil distributor 13 is fixedly connected to the main oil connector 11, and the oil distributor 13 is located inside the positioning base 1; a main oil pipe 12 is fixedly connected between the main oil connector 11 and the oil distributor 13; four hydraulic cylinders 14 are fixedly connected to the oil distributor 13 via a solenoid valve; a sliding seat 15 is fixedly connected to the output end of the hydraulic cylinder 14; a clamping rod 16 is fixedly connected to the sliding seat 15; an oil distribution assembly is provided on the main oil connector 11, which is used to control the position of the four clamping rods 16 by oil delivery; when the actuator piston is being processed and clamped, the positioning base 1 acts as the actuator. The main support of the piston hydraulic positioning and clamping device is the main oil connector 11, which is fixed to one end of the positioning base 1 and connected to the oil pump. The main oil connector 11 is connected to the output end and input end of the oil pump respectively. The oil pump sends oil into the main oil connector 11, and then sends it to the oil distribution cylinder 13 through the main oil pipe 12. The four No. 1 solenoid valves open synchronously, and the hydraulic oil is injected into the four No. 1 hydraulic cylinders 14 in the oil distribution cylinder 13. The four No. 1 hydraulic cylinders 14 push the clamping rods 16 on the sliding seat 15 to slide. The four clamping rods 16 are spread open, and then the actuator piston is placed in the center of the four clamping rods 16. Then the oil distribution assembly opens to extract part of the hydraulic oil, causing the output end of the four No. 1 hydraulic cylinders 14 to retract, which drives the four clamping rods 16 to slide and clamp the actuator piston, thus playing the role of hydraulic positioning and clamping of the actuator piston. During the machining of the actuator piston, the four clamping rods 16 clamp the piston around its perimeter, maintaining its position. When the machining process is stopped for observation, the oil distribution assembly injects a small amount of hydraulic oil into the four hydraulic cylinders 14, causing a small section of the clamping rods 16 to move away from the surface of the actuator piston, exposing the piston for easier observation. After observation, the oil distribution assembly removes the injected hydraulic oil, allowing the four clamping rods 16 to hydraulically position and clamp the actuator piston again. When machining and clamping actuator pistons of the same specification, only the position of the four clamping rods 16 needs to be finely adjusted by controlling the oil distribution assembly to pump hydraulic oil. When machining and clamping actuator pistons of different specifications, the hydraulic oil needs to be pumped back and re-injected according to the specifications to ensure the tightness of the clamping rods 16 in holding the actuator piston after the specification change. This allows for adaptive adjustment of the clamping force for pistons of the same and different specifications according to the machining state, thereby reducing deformation problems during actuator piston clamping and ensuring the machining accuracy of the actuator piston. Meanwhile, after the actuator pistons of different specifications are placed in the center of the four clamping rods 16, the four clamping rods 16 clamp the actuator pistons close to each other, which can guide the offset actuator pistons to be clamped in the center, further improving the accuracy of processing.

[0024] The oil distribution assembly includes an oil distribution tank 2 and an electric cylinder 21. The oil distribution tank 2 is fixedly connected to the main oil connector 11 via a second solenoid valve, and is also fixedly connected to the outside of the positioning base 1. The electric cylinder 21 is fixedly connected to the main oil connector 11, and its output end is located inside the oil distribution tank 2. When the positions of the four clamping rods 16 are adjusted according to the processing state of the actuator piston, the oil pump supplies oil into the main oil connector 11. At this time, the second solenoid valve closes, the four clamping rods 16 are opened, the oil pump stops supplying oil, the actuator piston is placed in the center of the four clamping rods 16, and then the second solenoid valve opens, and the output end of the electric cylinder 21 is located inside the oil distribution tank 2. The hydraulic oil in oil tank 2 retracts to draw hydraulic oil until the four clamping rods 16 position and clamp the actuator piston. The first solenoid valve closes, and the actuator piston is then processed. When it is necessary to observe the processing of the actuator piston during processing, the first solenoid valve opens, and the output of the electric cylinder 21 squeezes the hydraulic oil in oil tank 2. A small amount of hydraulic oil enters the four clamping rods 16, allowing for fine-tuning of their positions to expose the actuator piston for easy observation. When it is necessary to observe the processing of one side of the actuator piston during processing, the first solenoid valve on that side opens, and the output of the electric cylinder 21 squeezes... Hydraulic oil in the oil distribution tank 2 is distributed in small amounts to one or more interconnected clamping rods 16. The positions of these clamping rods 16 are fine-tuned to expose the desired position on the actuator piston. When machining actuator pistons of the same specification and unloading the finished piston, the electric cylinder 21 squeezes out all the hydraulic oil from the oil distribution tank 2, causing the four clamping rods 16 to reset and open. When machining pistons of different specifications, after the four clamping rods 16 reset and open, the oil pump draws out the injected hydraulic oil, and then injects hydraulic oil according to the actuator piston specifications. This oil distribution assembly design can... The device can control the position and state of the four clamping rods 16 according to different processing stages and requirements of the actuator piston, thereby achieving effective positioning and clamping of the actuator piston. Its unique hydraulic control method allows for flexible adjustment of the exposure degree of the actuator piston during processing, facilitating operators to observe the processing situation and improving processing accuracy and efficiency. Moreover, the device can adapt well to actuator pistons of the same and different specifications. By adjusting the amount of hydraulic oil injected, different positioning and clamping effects can be achieved, demonstrating the flexibility and versatility of the device, which can meet the processing needs of actuator pistons of different specifications.

[0025] like Figures 1 to 4As shown, an inner support seat 3 is fixedly connected to the oil distribution cylinder 13 via a No. 3 solenoid valve; four sliding plates 31 are slidably connected inside the inner support seat 3; an inner support block 32 is fixedly connected to one end of each sliding plate 31; when the actuator piston is positioned and clamped, the actuator piston is first placed in the center of the four clamping rods 16 and located on the inner support seat 3. The No. 3 solenoid valve is opened, and then the oil pump supplies oil to the multiple No. 1 hydraulic cylinders 14 connected to the oil distribution cylinder 13 and the interior of the inner support seat 3. The multiple sliding plates 31 slide out synchronously, cooperating with the inner support block 32 to press against the inner wall of the bottom of the actuator piston, positioning the bottom of the actuator piston. Then the No. 3 solenoid valve is closed, and the four The inner support block 32 maintains support for the bottom of the actuator piston. The electric cylinder 21 draws hydraulic oil from the four No. 1 hydraulic cylinders 14, causing the four clamping rods 16 to position and clamp the actuator piston. When it is necessary to release the actuator piston, the electric cylinder 21 injects hydraulic oil into the four No. 1 hydraulic cylinders 14, causing the four clamping rods 16 to release their positioning clamp on the actuator piston. Then, the No. 3 solenoid valve opens, and the oil pump draws out the hydraulic oil from the inner support seat 3. Multiple sliding plates 31 retract synchronously, and the inner support block 32 no longer supports the inner wall of the bottom of the actuator piston. At this time, the actuator piston can be easily removed, thus playing the role of supporting the bottom of actuator pistons of different specifications.

[0026] Four rotating rollers 4 are rotatably connected to the clamping rod 16 via torsion springs, and the four rotating rollers 4 are arranged in pairs facing each other. A clamping plate 41 is fixed to the rotating roller 4, and the cross-sectional shape of the clamping plate 41 is set as an arc. When clamping actuator pistons of different specifications, the four clamping rods 16 approach each other to the surface of the actuator piston, and multiple clamping plates 41 first adhere to the surface of the actuator piston and press. As the four clamping rods 16 continue to approach each other, the clamping plates 41 rotate in conjunction with the rotating rollers 4, and the torsion springs are stressed, so that multiple arc-shaped clamping plates 41 surround the surface of the actuator piston, improving the tightness of clamping the actuator piston.

[0027] A guide rod 5 is fixedly connected to the top of the clamping rod 16, and the top surface of the guide rod 5 is set as an inclined surface; a first rubber block 51 is fixedly connected to the clamping plate 41, and the first rubber block 51 is attached to the side of the clamping plate 41 near the first hydraulic cylinder 14; a second rubber block 52 is fixedly connected to the end of the inner support block 32 away from the sliding plate 31; when an actuator piston of the same specification is placed, the guide rod 5 on the four clamping rods 16 can guide the actuator piston by its inclined surface, so that the actuator piston is quickly positioned between the four clamping rods 16. As the four inner support blocks 32 support the bottom of the actuator piston, the second rubber block 52 can protect the inner support of the actuator piston, and the multiple first rubber blocks 51 also protect the clamping part of the clamping plate 41, reducing the damage caused when clamping the actuator piston.

[0028] like Figures 1 to 5As shown, a fixing frame 6 is fixedly connected to the positioning base 1 near the main oil connector 11; a pressing plate 61 is slidably connected to the inner wall of the fixing frame 6 via a first electric slider, and the cross-sectional shape of the pressing plate 61 is set to L-shape; a connecting assembly is provided on the fixing frame 6, which is used to move the four clamping rods 16 away from the workpiece when the pressing plate 61 presses against it; when processing the lower half of the actuator piston, the four clamping rods 16 are easily obstructed and affect the processing. The first electric slider drives the pressing plate 61 to slide down into the interior of the fixing frame 6, and the connecting assembly simultaneously squeezes hydraulic oil to open the four clamping rods 16 away from the actuator piston. As the pressing plate 61 presses against the top of the actuator piston, the actuator piston is clamped from top to bottom, and the four clamping rods 16 on the side are moved away. The lower half of the actuator piston can be machined, avoiding obstruction during machining and improving machining convenience and efficiency. After machining is completed, the first electric slider drives the pressure plate 61 to rise, and the connecting assembly returns the hydraulic oil, allowing the four clamping rods 16 to approach the actuator piston again, restoring the side clamping state of the actuator piston and preparing for the next operation. This flexible clamping method can adapt to different machining needs, improving the practicality and versatility of the actuator piston hydraulic positioning and clamping device. Moreover, the L-shaped design of the pressure plate 61 can better fit the top of the actuator piston, increasing the stability and firmness of the pressure, reducing the shaking of the actuator piston during machining, and ensuring machining accuracy and quality.

[0029] The connecting assembly includes an oil accumulator 7 and a first oil pipe 71. The oil accumulator 7 is fixedly connected to the fixed frame 6, and a pressure plate is provided on the pressure plate 61, which is slidably connected inside the oil accumulator 7. The first oil pipe 71 is fixedly connected between the oil accumulator 7 and the main oil connector 11, and a fourth solenoid valve is installed at the connection between the first oil pipe 71 and the main oil connector 11. When the first electric slider drives the pressure plate 61 to slide down, the pressure plate on the pressure plate 61 is located inside the oil accumulator 7 and squeezes the hydraulic oil. The fourth solenoid valve opens and the second solenoid valve closes. Then, the hydraulic oil in the oil accumulator 7 is sent to the four first hydraulic cylinders 14 through the first oil pipe 71, so that the four clamping rods 16 move away from each other, thereby clamping the actuator piston up and down. When pressing the top of the actuator piston of different specifications, the pressure plate 61 needs to press on the top of the actuator piston, and excess hydraulic oil can be extracted by opening the second solenoid valve to accommodate the clamping of actuator pistons of different heights.

[0030] like Figures 1 to 6As shown, a limiting plate 8 is fixedly connected to the pressing plate 61, and the limiting plate 8 has multiple limiting grooves; a rotating rod 81 is rotatably connected to the limiting plate 8; a pressing block 82 is fixedly connected to the bottom end of the rotating rod 81; a limiting block 83 is sleeved on the rotating rod 81, and the limiting block 83 can be inserted into one of the limiting grooves of the limiting plate 8; a threaded sleeve 84 is threadedly connected to the rotating rod 81, and the threaded sleeve 84 is located above the limiting block 83; when clamping actuator pistons at different protruding positions, the position of the pressing block 82 is adjusted by rotating the rotating rod 81 according to the model of the actuator piston to be clamped, and then the limiting block 83 is inserted into one of the limiting grooves of the limiting plate 8, and the threaded sleeve 84 is rotated until the threaded sleeve 84 presses against the upper limit of the limiting block 83, so that the actuator pistons at different protruding positions can be clamped up and down by relying on the pressing block 82.

[0031] like Figures 1 to 5 As shown, a second hydraulic cylinder 91 is fixedly connected to the fixed frame 6; a second oil pipe 9 is fixedly connected between the second hydraulic cylinder 91 and the oil distribution tank 2 and the oil storage box 7, and a fifth solenoid valve is installed at the connection between the second oil pipe 9 and the oil distribution tank 2; two sliding clamps 92 are slidably connected to the fixed frame 6, and the two sliding clamps 92 are arranged opposite to each other, with one sliding clamp 92 fixedly connected to the output end of the second hydraulic cylinder 91; a gear 93 is rotatably connected to the fixed frame 6, and the gear 93 can mesh with the two sliding clamps 92; when processing the lower half of the actuator piston, the pressure plate 61 drives the pressure plate to slide down, causing... As the four clamping rods 16 move away from the actuator piston, the hydraulic oil in the oil accumulator 7 is sent to the four hydraulic cylinders 14 through the first oil pipe 71. Some hydraulic oil is sent to the second hydraulic cylinder 91 through the second oil pipe 9. Excess hydraulic oil can be temporarily stored in the oil distribution tank 2 by opening the fifth solenoid valve. The output end of the second hydraulic cylinder 91 drives a sliding clamp 92 to slide. The sliding clamp 92 synchronously drives another sliding clamp 92 meshing with the gear 93 to slide, so that the two sliding clamps 92 can clamp the upper part of the actuator piston, improving the stability of processing the lower part of the actuator piston.

[0032] A fixing plate 94 is fixedly connected to the sliding clamping plate 92; multiple clamping plates 95 are fixedly connected to the fixing plate 94, and the cross-sectional shape of the clamping plates 95 is set to V-shape; a third rubber block 96 is fixedly connected to the side of the clamping plate 95 away from the fixing plate 94; when clamping the upper part of the actuator piston, the fixing plate 94 is fixed to the sliding clamping plate 92, and the multiple clamping plates 95 and the third rubber block 96 are used to adapt to the shape of different types of actuator pistons. The V-shaped clamping plate 95 can increase the contact area with the surface of the actuator piston, thereby increasing the friction and making the clamping more stable. The third rubber block 96 further enhances the fit with the actuator piston, reducing the loosening and displacement during the clamping process. Even if the surface of the actuator piston is uneven, the clamping plate 95 and the third rubber block 96 can be well adapted to ensure effective clamping of different types of actuator pistons.

[0033] Working process: During the clamping of the actuator piston, the positioning base 1 serves as the main support for the hydraulic positioning and clamping device of the actuator piston. The main oil connector 11 is fixed to one end of the positioning base 1 and connected to the oil pump. The main oil connector 11 is connected to the output end and input end of the oil pump respectively. Oil is pumped into the main oil connector 11 and sent to the oil distribution cylinder 13 through the main oil pipe 12. The four No. 1 solenoid valves open synchronously, and hydraulic oil is injected into the four No. 1 hydraulic cylinders 14 in the oil distribution cylinder 13. The four No. 1 hydraulic cylinders 14 push the clamping rod 16 on the sliding seat 15 synchronously. The four clamping rods 16 are opened, and the actuator piston is then placed in the center of the four clamping rods 16. Immediately afterwards, the oil distribution assembly opens to draw in some hydraulic oil, causing the output ends of the four hydraulic cylinders 14 to retract. This retracts the four clamping rods 16, which then slide and clamp the actuator piston, providing hydraulic positioning and clamping for the piston. During the actuator piston's machining process, the four clamping rods 16 clamp around the actuator piston, maintaining its position. When the actuator piston's machining process is stopped for observation, the oil distribution assembly can supply hydraulic oil to the four hydraulic cylinders 14. A small amount of hydraulic oil is injected into the actuator piston to keep the four clamping rods 16 segments away from the surface of the actuator piston, exposing the entire actuator piston for easy observation. After observation, the oil distribution assembly extracts the injected hydraulic oil again, allowing the four clamping rods 16 to hydraulically position and clamp the actuator piston again. When clamping actuator pistons of the same specification, only the position of the four clamping rods 16 needs to be finely adjusted by controlling the oil distribution assembly to pump hydraulic oil. When clamping actuator pistons of different specifications, the hydraulic oil needs to be pumped back and re-injected according to the different specifications to ensure the tightness of the clamping rods 16 in clamping the actuator piston after the specification change. This allows for adaptive adjustment of the clamping force for pistons of the same and different specifications according to the processing state, thereby reducing deformation problems during actuator piston clamping and ensuring the processing accuracy of the actuator piston. At the same time, after the actuator pistons of different specifications are placed in the center of the four clamping rods 16, the four clamping rods 16 clamp the actuator piston close to each other, which can guide the offset actuator piston to be centered and clamped, further improving the processing accuracy. When the positions of the four clamping rods 16 are adjusted according to the machining status of the actuator piston, oil is pumped into the main oil connector 11. At this time, the second solenoid valve is closed, the four clamping rods 16 are spread open, the oil pump stops pumping oil, and the actuator piston is placed in the center of the four clamping rods 16. Then, the second solenoid valve is opened, and the output end of the electric cylinder 21 retracts inside the oil distribution tank 2 to draw hydraulic oil until the four clamping rods 16 position and clamp the actuator piston. The first solenoid valve is then closed, and the actuator piston is then machined. When it is necessary to observe the machining status of the actuator piston during the machining process, the first solenoid valve is opened, and the output end of the electric cylinder 21 squeezes the hydraulic oil in the oil distribution tank 2. A small amount of hydraulic oil enters the four clamping rods 16 respectively. Inside, the positions of the four clamping rods 16 are finely adjusted to expose the actuator piston for easy observation. When it is necessary to observe the processing of one side of the actuator piston during processing, the No. 1 solenoid valve on the side to be observed is opened, and the output end of the electric cylinder 21 squeezes the hydraulic oil in the oil distribution tank 2. A small amount of hydraulic oil enters one or more connected clamping rods 16. The positions of the one or more clamping rods 16 are finely adjusted to expose the position of the actuator piston to be observed. When processing actuator pistons of the same specification and unloading the processed actuator piston, the electric cylinder 21 squeezes out all the hydraulic oil in the oil distribution tank 2, so that the four clamping rods 16 are reset and opened. When processing pistons of different specifications, the four clamping rods 16 are adjusted to expose the position of the actuator piston for easy observation. After the clamping rod 16 is reset and opened, the oil pump draws out the injected hydraulic oil, and then injects hydraulic oil of appropriate size according to the actuator piston specifications. This oil distribution assembly design can control the position and state of the four clamping rods 16 according to different processing stages and requirements of the actuator piston, thereby achieving effective positioning and clamping of the actuator piston. Its unique hydraulic control method allows for flexible adjustment of the actuator piston exposure during processing, facilitating operator observation of the processing status and improving processing accuracy and efficiency. Moreover, this device can adapt well to actuator pistons of the same and different specifications, achieving different positioning and clamping effects by adjusting the amount of hydraulic oil injected, demonstrating the device's effectiveness. The flexibility and versatility of the design can meet the processing requirements of actuator pistons of different specifications. When the actuator piston is positioned and clamped, the actuator piston is first placed in the center of the four clamping rods 16 and located on the inner support seat 3. The No. 3 solenoid valve is opened, and then the oil pump supplies oil to the multiple No. 1 hydraulic cylinders 14 connected to the oil distribution cylinder 13 and the interior of the inner support seat 3. Multiple sliding plates 31 slide out synchronously and cooperate with the inner support block 32 to press against the inner wall of the bottom of the actuator piston, positioning the bottom of the actuator piston. Then the No. 3 solenoid valve is closed, and the four inner support blocks 32 maintain support for the bottom of the actuator piston. The electric cylinder 21 draws hydraulic oil from the four No. 1 hydraulic cylinders 14, so that the four clamping rods 16 position and clamp the actuator piston.When the actuator piston needs to be released, the electric cylinder 21 injects hydraulic oil into the four hydraulic cylinders 14, causing the four clamping rods 16 to release their positioning clamps on the actuator piston. Then, the solenoid valve 3 opens, and the oil pump extracts the hydraulic oil from the inner support seat 3. Multiple sliding plates 31 retract synchronously, and the inner support block 32 no longer supports the inner wall of the bottom of the actuator piston. At this time, the actuator piston can be easily removed, which serves as an inner support for the bottom of actuator pistons of different specifications. When clamping actuator pistons of different specifications, the four clamping rods 16 approach each other to the surface of the actuator piston, and multiple clamping plates 41 first press against the surface of the actuator piston. As the four clamping rods 16 continue to approach each other, the clamping plates 41 rotate in conjunction with the rotating roller 4, and the torsion spring is stressed, so that multiple curved clamping plates 41 surround the surface of the actuator piston, improving the tightness of the clamping of the actuator piston. When placing actuator pistons of the same specification, the guide rods 5 on the four clamping rods 16 can guide the actuator piston by their inclined surfaces, so that the actuator piston is quickly positioned between the four clamping rods 16. As the four inner support blocks 32 support the bottom of the actuator piston, the second rubber block 52 can protect the inner support of the actuator piston. The multiple first rubber blocks 51 also protect the clamping part of the clamping plate 41, reducing the possibility of damage to the actuator piston when clamping. When machining the lower half of the actuator piston, the four clamping rods 16 can easily obstruct the machining process. By using the first electric slider to slide the pressure plate 61 down into the fixed frame 6, the connecting assembly simultaneously squeezes hydraulic oil to open the four clamping rods 16 away from the actuator piston. As the pressure plate 61 presses against the top of the actuator piston, the piston is clamped vertically, and the four side clamping rods 16 are moved away, allowing machining of the lower half of the actuator piston to proceed without obstruction, thus improving machining convenience and efficiency. After machining is complete, the first electric slider raises the pressure plate 61, and the connecting assembly returns the hydraulic oil, causing the four clamping rods 16 to move closer to the actuator piston again, restoring the side clamping state and preparing for the next operation. This flexible clamping method can adapt to different machining needs and improves the hydraulic performance of the actuator piston. The pressure positioning clamping device is practical and versatile. Moreover, the L-shaped design of the pressure plate 61 can better fit the top of the actuator piston, increasing the stability and firmness of the pressure, reducing the shaking of the actuator piston during processing, and ensuring the accuracy and quality of processing. When the first electric slider drives the pressure plate 61 to slide down, the oil pressure plate on the pressure plate 61 is located inside the oil accumulator 7 and squeezes the hydraulic oil. The fourth solenoid valve opens and the second solenoid valve closes. Then, the hydraulic oil in the oil accumulator 7 is sent to the four first hydraulic cylinders 14 through the first oil pipe 71, so that the four clamping rods 16 move away from each other, realizing the upper and lower clamping of the actuator piston. When pressing the top of the actuator piston of different specifications, the pressure plate 61 needs to press on the top of the actuator piston, and excess hydraulic oil can be extracted by opening the second solenoid valve to accommodate the upper and lower clamping of actuator pistons of different heights. When clamping actuator pistons at different protruding positions, adjust the position of the pressing block 82 by rotating the rotating rod 81 according to the model of the actuator piston to be clamped. Then, insert the limiting block 83 into a limiting groove of the limiting plate 8. Rotate the threaded sleeve 84 until the threaded sleeve 84 presses against the upper limit of the limiting block 83. The pressing block 82 can then be used to clamp actuator pistons at different protruding positions. When machining the lower half of the actuator piston, the pressure plate 61 drives the pressure oil plate to slide down, causing the four clamping rods 16 to move away from the actuator piston. During the downward movement, the hydraulic oil in the oil accumulator 7 is sent to the four hydraulic cylinders 14 through the first oil pipe 71, and some hydraulic oil is sent to the second hydraulic cylinder 91 through the second oil pipe 9. Excess hydraulic oil can be temporarily stored in the oil distribution tank 2 by opening the fifth solenoid valve. The output end of the second hydraulic cylinder 91 drives a sliding clamp 92 to slide. The sliding clamp 92 synchronously drives another sliding clamp 92 meshing with the gear 93, so that the two sliding clamps 92 can clamp the upper half of the actuator piston, improving the clamping effect on the lower half of the actuator piston. Stability of the upper part of the actuator piston: When clamping the upper part of the actuator piston, the fixing plate 94 is fixed on the sliding clamping plate 92, and together with multiple clamping plates 95 and rubber block 96, it adapts to the shape of different types of actuator pistons. The V-shaped clamping plate 95 can increase the contact area with the surface of the actuator piston, thereby increasing the friction and making the clamping more stable. The rubber block 96 further enhances the fit with the actuator piston, reducing the loosening and displacement during the clamping process. Even if the surface of the actuator piston is uneven, the clamping plate 95 and the rubber block 96 can adapt well to ensure effective clamping of different types of actuator pistons.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic positioning and clamping device for an actuator piston, characterized in that: The system includes a positioning base; a main oil connector is fixedly connected to one end of the positioning base, and the main oil connector can be connected to an external oil pump; an oil distributor is fixedly connected to the main oil connector, and the oil distributor is located inside the positioning base; a main oil pipe is fixedly connected between the main oil connector and the oil distributor; four hydraulic cylinders are fixedly connected to the oil distributor via a solenoid valve; a sliding seat is fixedly connected to the output end of the hydraulic cylinder; a clamping rod is fixedly connected to the sliding seat; and an oil distribution assembly is provided on the main oil connector, which is used to control the position of the four clamping rods by supplying oil.

2. The actuator piston hydraulic positioning and clamping device according to claim 1, characterized in that: The oil distribution assembly includes an oil distribution tank and an electric cylinder; the oil distribution tank is fixedly connected to the main oil connector via a second solenoid valve, and the oil distribution tank is fixedly connected to the outside of the positioning base; the electric cylinder is fixedly connected to the main oil connector, and the output end of the electric cylinder is located inside the oil distribution tank.

3. The actuator piston hydraulic positioning and clamping device according to claim 2, characterized in that: An inner support seat is fixedly connected to the oil separator via a No. 3 solenoid valve; four sliding plates are slidably connected inside the inner support seat; an inner support block is fixedly connected to one end of each sliding plate.

4. The actuator piston hydraulic positioning and clamping device according to claim 3, characterized in that: The clamping rod is rotatably connected to four rotating rollers via torsion springs, and the four rotating rollers are arranged in pairs facing each other; a clamping plate is fixed to the rotating roller, and the cross-sectional shape of the clamping plate is set as an arc.

5. The actuator piston hydraulic positioning and clamping device according to claim 4, characterized in that: A guide rod is fixed to the top of the clamping rod, and the top surface of the guide rod is set as an inclined surface; a first rubber block is fixed to the clamping plate, and the first rubber block is attached to the side of the clamping plate near the first hydraulic cylinder; a second rubber block is fixed to the end of the inner support block away from the sliding plate.

6. The actuator piston hydraulic positioning and clamping device according to claim 2, characterized in that: A fixing frame is fixedly connected to the positioning base near the main oil connector; a pressure plate is slidably connected to the inner wall of the fixing frame via a first electric slider, and the cross-sectional shape of the pressure plate is set to L-shape; a connecting component is provided on the fixing frame, which is used to move the four clamping rods away from the workpiece when the pressure plate presses the workpiece.

7. The actuator piston hydraulic positioning and clamping device according to claim 6, characterized in that: The connecting assembly includes an oil storage box and an oil pipe No. 1; the oil storage box is fixedly connected to the fixed frame, and an oil pressure plate is provided on the pressure plate, which is slidably connected inside the oil storage box; an oil pipe No. 1 is fixedly connected between the oil storage box and the main oil connector, and a solenoid valve No. 4 is installed at the connection between the oil pipe No. 1 and the main oil connector.

8. The actuator piston hydraulic positioning and clamping device according to claim 6, characterized in that: A limiting plate is fixedly attached to the pressing plate, and the limiting plate has multiple limiting grooves; a rotating rod is rotatably connected to the limiting plate; a pressing block is fixedly attached to the bottom end of the rotating rod; a limiting block is sleeved on the rotating rod, and the limiting block can be inserted into one of the limiting grooves of the limiting plate; a threaded sleeve is threadedly connected to the rotating rod, and the threaded sleeve is located above the limiting block.

9. The actuator piston hydraulic positioning and clamping device according to claim 7, characterized in that: A second hydraulic cylinder is fixedly connected to the fixed frame; a second oil pipe is fixedly connected between the second hydraulic cylinder and the oil distribution tank and the oil storage box, and a fifth solenoid valve is installed at the connection between the second oil pipe and the oil distribution tank; two sliding clamps are slidably connected to the fixed frame, and the two sliding clamps are arranged opposite to each other, with one sliding clamp fixedly connected to the output end of the second hydraulic cylinder; a gear is rotatably connected to the fixed frame, and the gear can mesh with the two sliding clamps.

10. The actuator piston hydraulic positioning and clamping device according to claim 9, characterized in that: A fixing plate is fixedly connected to the sliding clamp plate; multiple clamping plates are fixedly connected to the fixing plate, and the cross-sectional shape of the clamping plates is set to V-shape; a No. 3 rubber block is fixedly connected to the side of the clamping plate away from the fixing plate.

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