Electro-hydrostatic servo mechanism

Abstract

The utility model discloses an electro-hydrostatic servo mechanism, which relates to the technical field of hydraulic servo control, and comprises a hydraulic cylinder, a pump body, a motor and an energy accumulator, the end part of the energy accumulator is communicated with an oil outlet pipe, the end part of the pump body is communicated with an oil inlet pipe and an oil guide pipe, a filter pipe is arranged between the oil outlet pipe and the oil inlet pipe, and a filter screen is fixedly embedded in the filter pipe. Supporting pipes are arranged at the two ends of the filter pipe in a communicating mode, connecting threads are formed outside the ends, away from each other, of the two supporting pipes, inner threaded pipes are arranged on the ends, away from each other, of the two supporting pipes in a threaded sleeving mode, outer threads are formed in the pipe walls of the oil outlet pipe and the oil inlet pipe and are in threaded fit with the inner threaded pipes, and rotary locking mechanisms are arranged on the pipe walls of the supporting pipes; and the rotary locking mechanism is used for driving the internal thread pipe to rotate. When the servo mechanism operates, oil flowing into the mechanism can be filtered in advance, and impurities in the oil are prevented from entering mechanism components to affect the overall stable operation of the mechanism as much as possible.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic servo control technology, specifically to an electro-hydraulic servo mechanism. Background Technology

[0002] The electro-hydraulic servo mechanism is mainly composed of hydraulic servo valves, hydraulic actuators and other hydraulic components, which are responsible for efficiently converting hydraulic energy into mechanical energy to achieve precise control of the load.

[0003] In existing electro-hydraulic servo mechanisms, hydraulic fluid is input through an accumulator, and the pump body drives the hydraulic actuator to move via a motor, thereby achieving precise control of the corresponding actions. However, when the hydraulic fluid flows in the internal pipeline of the mechanism, impurities in the outside air can enter the pipeline through sealing gaps and vents, contaminating the hydraulic fluid. If the hydraulic fluid flows out directly from the accumulator without being filtered, it can easily affect the stable operation of the subsequent pump body and the internal components of the hydraulic actuator, thus reducing the overall operational stability of the mechanism. Utility Model Content

[0004] In view of the problems existing in the above-mentioned electro-hydraulic servo mechanism, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide an electrostatic servo mechanism that solves the problem that the oil inside the existing electrostatic servo mechanism is not effectively filtered during the flow process, and is easily mixed with external impurities, causing pollution and affecting the stable operation of the internal components of the overall mechanism.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An electro-hydraulic servo mechanism includes a hydraulic cylinder, a pump body, a motor, and an accumulator. The accumulator is characterized by having an oil outlet pipe connected to its end, an oil inlet pipe and an oil guide pipe connected to the end of the pump body, and a filter pipe between the oil outlet pipe and the oil inlet pipe, with a filter screen fixedly embedded inside the filter pipe.

[0008] Both ends of the filter tube are connected to support tubes. The two support tubes are connected by threads at the ends that are far apart from each other, and are threaded with internal thread tubes. The walls of the oil outlet tube and the oil inlet tube are threaded with external threads, which are threaded with the internal thread tubes.

[0009] The wall of the support tube is provided with a rotary locking mechanism, which is used to drive the internally threaded tube to rotate.

[0010] Preferably, the rotary locking mechanism includes a movable ring and a rotating ring. The movable ring is slidably sleeved on the outside of the support tube, and the rotating ring is rotatably sleeved on the outer wall of the movable ring. A guide rod is fixedly embedded on the side of the movable ring. A guide groove is opened on the wall of the support tube. The end of the guide rod is slidably disposed in the guide groove. A connecting plate is fixed between the rotating ring and the internally threaded tube.

[0011] Preferably, the outer wall of the filter tube is fixedly provided with two symmetrically arranged mounting plates, and each of the two mounting plates is rotatably provided with a drive screw. The end of the drive screw is threaded with a sliding plate, the sliding plate is fixedly connected to the moving ring, and a telescopic rod is fixedly provided between the mounting plate and the sliding plate.

[0012] Preferably, the two drive screws are fixed together at one end close to each other with a rotating block.

[0013] Furthermore, the guide groove is arranged in a serpentine shape.

[0014] Preferably, the rotating ring is rotatably fitted onto the outside of the moving ring via its internal bearing.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. This utility model, through the provided pump body, motor, hydraulic cylinder, accumulator, oil outlet pipe, oil inlet pipe, filter pipe and filter screen, can filter the oil flowing into the mechanism in advance during the operation of the servo mechanism, so as to avoid impurities inside the oil from entering the internal components of the mechanism and affecting the overall stable operation of the mechanism.

[0017] 2. This utility model, through the provided oil outlet pipe, oil inlet pipe, filter pipe, support pipe, internal threaded pipe and rotary locking mechanism, enables the two ends of the filter pipe to be quickly threadedly connected to the oil outlet pipe and the oil inlet pipe, ensuring effective sealing during the operation of the overall mechanism. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of part A;

[0021] Figure 3This is a three-dimensional structural diagram of the filter tube of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Hydraulic cylinder; 2. Pump body; 3. Motor; 4. Accumulator; 5. Oil outlet pipe; 6. Oil inlet pipe; 7. Oil guide pipe; 8. Filter pipe; 9. Filter screen; 10. Support pipe; 11. Internally threaded pipe; 12. Moving ring; 13. Rotating ring; 14. Guide rod; 15. Guide groove; 16. Connecting plate; 17. Mounting plate; 18. Drive screw; 19. Slide plate; 20. Telescopic rod; 21. Rotating block. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model discloses an electrostatic servo mechanism.

[0026] This utility model provides, for example Figure 1-3 An electro-hydraulic servo mechanism is shown, including a hydraulic cylinder 1, a pump body 2, a motor 3 and an accumulator 4. An oil outlet pipe 5 is connected to the end of the accumulator 4, and an oil inlet pipe 6 and an oil guide pipe 7 are connected to the end of the pump body 2. A filter pipe 8 is provided between the oil outlet pipe 5 and the oil inlet pipe 6, and a filter screen 9 is fixedly embedded inside the filter pipe 8.

[0027] Both ends of the filter pipe 8 are connected to support pipes 10. The two support pipes 10 are connected by threads on the outside of the ends that are far apart, and are threaded with internal thread pipes 11. The walls of the oil outlet pipe 5 and the oil inlet pipe 6 are threaded and are threaded with the internal thread pipes 11.

[0028] In order to achieve a quick and sealed connection between filter pipe 8 and oil outlet pipe 5 and oil inlet pipe 6, such as Figure 2-3 As shown, the support tube 10 has a rotating locking mechanism on its wall. The rotating locking mechanism is used to drive the internally threaded tube 11 to rotate. The rotating locking mechanism includes a moving ring 12 and a rotating ring 13. The moving ring 12 is slidably sleeved on the outside of the support tube 10. The rotating ring 13 is rotatably sleeved on the outside of the moving ring 12 through its internal bearing. The rotating ring 13 is rotatably sleeved on the outer wall of the moving ring 12. A guide rod 14 is fixedly embedded on the side of the moving ring 12. A guide groove 15 is opened on the wall of the support tube 10. The guide groove 15 is serpentine. The end of the guide rod 14 is slidably disposed in the guide groove 15. A connecting plate 16 is fixedly provided between the rotating ring 13 and the internally threaded tube 11.

[0029] Two symmetrically arranged mounting plates 17 are fixedly provided on the outer wall of the filter tube 8. Both mounting plates 17 are rotatably provided with drive screws 18. The two drive screws 18 are fixedly provided with a rotating block 21 at one end close to each other. The end of the drive screw 18 is threaded with a sliding plate 19. The sliding plate 19 is fixedly connected to the moving ring 12. A telescopic rod 20 is fixedly provided between the mounting plate 17 and the sliding plate 19.

[0030] Usage: When using this electro-hydraulic servo mechanism, align the internal threaded tubes 11 on the support tubes 10 at both ends of the filter tube 8 with the oil outlet tube 5 and the oil inlet tube 6 respectively, so that the internal threaded tubes 11 make initial contact with the external threads of the oil outlet tube 5 and the oil inlet tube 6.

[0031] Next, the rotating locking mechanism is operated by rotating the rotating block 21. The rotating block 21 drives the two drive screws 18 to rotate synchronously. Since the slide plate 19 is threadedly engaged with the drive screw 18, and a telescopic rod 20 is provided between the mounting plate 17 and the slide plate 19, the slide plate 19 will move along the axial direction of the drive screw 18 when the drive screw 18 rotates. Since the slide plate 19 is fixedly connected to the moving ring 12, the moving ring 12 will slide on the support tube 10.

[0032] The guide rod 14 on the side of the moving ring 12 slides in the serpentine guide groove 15. This design of the serpentine guide groove 15 allows the moving ring 12 to move axially while also driving the rotating ring 13 to rotate. The rotating ring 13 is fixedly connected to the internal threaded pipe 11 through the connecting plate 16. The rotation of the rotating ring 13 drives the internal threaded pipe 11 to rotate, thereby achieving a tight threaded connection between the internal threaded pipe 11 and the oil outlet pipe 5 and the oil inlet pipe 6, ensuring the sealing performance between the filter pipe 8 and the oil outlet pipe 5 and the oil inlet pipe 6, and preventing oil leakage.

[0033] After installation, start motor 3. Motor 3 drives pump body 2 to run. Oil in accumulator 4 flows out through oil outlet pipe 5. When passing through filter pipe 8, impurities in the oil are filtered and intercepted by filter screen 9. The filtered clean oil enters pump body 2 through oil inlet pipe 6. Then pump body 2 delivers oil to hydraulic cylinder 1, driving the piston of hydraulic cylinder 1 to move, thus achieving precise control of the load.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An electro-hydraulic servo mechanism comprising a hydraulic cylinder (1), a pump body (2), an electric motor (3) and an accumulator (4), characterized in that, The end of the accumulator (4) is connected to an oil outlet pipe (5), the end of the pump body (2) is connected to an oil inlet pipe (6) and an oil guide pipe (7), a filter pipe (8) is provided between the oil outlet pipe (5) and the oil inlet pipe (6), and a filter screen (9) is fixedly embedded inside the filter pipe (8). Both ends of the filter tube (8) are connected to support tubes (10). The two support tubes (10) are connected by connecting threads at one end away from each other, and are threaded with internal thread tubes (11). The walls of the oil outlet tube (5) and the oil inlet tube (6) are threaded and are threaded with the internal thread tubes (11). The wall of the support tube (10) is provided with a rotary locking mechanism, which is used to drive the internally threaded tube (11) to rotate.

2. The electro-hydrostatic actuator of claim 1, wherein, The rotary locking mechanism includes a movable ring (12) and a rotating ring (13). The movable ring (12) is slidably sleeved on the outside of the support tube (10). The rotating ring (13) is rotatably sleeved on the outer wall of the movable ring (12). A guide rod (14) is fixedly embedded on the side of the movable ring (12). A guide groove (15) is opened on the wall of the support tube (10). The end of the guide rod (14) is slidably disposed in the guide groove (15). A connecting plate (16) is fixedly provided between the rotating ring (13) and the internally threaded tube (11).

3. The electro-hydrostatic actuator of claim 1, wherein, The outer wall of the filter tube (8) is fixed with two symmetrically arranged mounting plates (17). The interior of each mounting plate (17) is rotatably provided with a drive screw (18). The end of the drive screw (18) is threaded with a sliding plate (19). The sliding plate (19) is fixedly connected to the moving ring (12). A telescopic rod (20) is fixed between the mounting plate (17) and the sliding plate (19).

4. The electro-hydrostatic actuator of claim 3, wherein, The two drive screws (18) are fixed together at one end with a rotating block (21).

5. The electro-hydrostatic actuator of claim 2, wherein, The guide groove (15) is arranged in a serpentine shape.

6. The electro-hydraulic servo mechanism according to claim 2, characterized in that, The rotating ring (13) is rotatably sleeved on the outside of the moving ring (12) via its internal bearing.

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