Automatic centering device for servo valve

Abstract

The invention relates to the technical field of servo valve assembly, in particular to a servo valve automatic centering device which comprises a machine base, a centering mechanism is installed on the machine base through an assembly mechanism, the centering mechanism comprises an inverted-U-shaped plate, and the side wall of the inverted-U-shaped plate is rotationally connected with a reciprocating threaded pipe and a reciprocating threaded rod in a penetrating mode. One end of the reciprocating threaded pipe is rotatably connected with a circular plate, the side wall of the reciprocating threaded pipe is in threaded connection with a positioning nut, the positioning nut and the side wall of the circular plate are jointly provided with a plurality of X-shaped positioning telescopic frames, the X-shaped positioning telescopic frames are provided with positioning plates, and the side wall of the reciprocating threaded rod is provided with a circular ring plate; the side wall of the reciprocating threaded rod is in threaded connection with an adjusting nut, and the adjusting nut and the side wall of the annular plate are jointly provided with a plurality of X-shaped adjusting telescopic frames. By arranging the reciprocating threaded pipe, the positioning plate, the positioning nut and other structures, a hole in the side portion of the servo valve body and the reciprocating threaded pipe are coaxial, and preliminary centering operation is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of servo valve assembly, and particularly relates to an automatic centering device for a servo valve. Background Art

[0002] A servo valve is a precision device that precisely controls the flow rate, pressure, and direction of a fluid (hydraulic oil or gas) through an electrical signal. The servo valve includes a servo valve body and a receiver. After assembling and fitting the servo valve body and the receiver, gas enters the servo valve and flows into the nozzle inside the servo valve body. By controlling the angle of the nozzle, the gas entering the two air flow channels of the receiver is distributed, and finally the actuator is pushed to act in the corresponding direction. In the initial state without giving an instruction to the control device, theoretically, the center of the nozzle should be in the middle of the two air flow channels of the receiver.

[0003] After retrieval, the patent with the application number: CN202220499689.7, an automatic centering device for a servo valve, includes a base, a servo valve, and a receiver. A motor is provided on the base. The output end of the motor is connected to a screw rod. The end of the screw rod is rotatably installed on a docking seat at the other end of the base. A slide rail parallel to the bottom of the screw rod is installed. Automatic distance measurement is performed by a distance measuring instrument, which is connected and coordinated with a bottom controller and an electric control adjustment seat to achieve automatic adjustment and precise alignment. However, there are also some deficiencies:

[0004] When assembling and fitting the servo valve body and the receiver, it is necessary to first determine the distance of the center position of the servo valve before being able to perform centering by distance measurement with the distance measuring instrument. Then, it is necessary to mark the midpoint of the holes on the side of the servo valve every time, and the operation is relatively cumbersome. Moreover, it can only complete the centering adjustment in the horizontal direction and cannot perform centering adjustment in the vertical direction, having certain limitations. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and a kind of automatic centering device for a servo valve is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A servo valve automatic centering device, including a machine base, on which a centering mechanism is installed through a component mechanism. The centering mechanism includes an inverted U-shaped plate. A reciprocating threaded tube and a reciprocating threaded rod are rotatably connected through the side wall of the inverted U-shaped plate. One end of the reciprocating threaded tube is rotatably connected with a circular plate. A positioning nut is threadedly connected to the side wall of the reciprocating threaded tube. A plurality of X-shaped positioning telescopic frames are jointly installed on the side walls of the positioning nut and the circular plate. A positioning plate is provided on the X-shaped positioning telescopic frame. A circular ring plate is provided on the side wall of the reciprocating threaded rod. An adjusting nut is threadedly connected to the side wall of the reciprocating threaded rod. A plurality of X-shaped adjusting telescopic frames are jointly installed on the side walls of the adjusting nut and the circular ring plate. An adjusting plate is provided on the X-shaped adjusting telescopic frame. A first conical wheel is installed on the side wall of the reciprocating threaded tube through a first one-way bearing. A second conical wheel is installed on the side wall of the reciprocating threaded rod through a second one-way bearing. A motor is installed on the inner wall of the inverted U-shaped plate. The output end of the motor is fixedly connected with a driving conical wheel. A limiting rod is installed on the side wall of the positioning nut. The limiting rod slides through the side wall of the inverted U-shaped plate.

[0008] Preferably, a box body is fixedly connected to the side wall of the reciprocating threaded rod. A through hole is opened on the side wall of the box body. A rectangular cylinder is slidably connected to the inner wall of the through hole. A reciprocating lead screw is rotatably connected through the inner wall of the box body. A screw sleeve is threadedly connected to the side wall of the reciprocating lead screw. The screw sleeve is fixedly connected with the rectangular cylinder. A second gear is fixedly connected to the side wall of the reciprocating lead screw. A first gear is sleeved and rotatably arranged on the side wall of the reciprocating threaded rod. Limiting rods are symmetrically installed on the side wall of the adjusting nut. The limiting rods slide through the first gear.

[0009] Preferably, a magnetic spring is fixedly connected to the inner wall of the rectangular cylinder. The other end of the magnetic spring is fixedly connected with a sliding column. A scraping plate is fixedly installed at the other end of the sliding column.

[0010] Preferably, an annular block is fixedly installed on the side wall of the inverted U-shaped plate. The annular block and the side wall of the reciprocating threaded rod are hermetically slidable. An annular groove is opened on the inner side wall of the annular block. An L-shaped tube is embedded and installed in the inner wall of the reciprocating threaded rod. One end of the L-shaped tube is located inside the annular groove. The other end of the L-shaped tube is located outside the reciprocating threaded rod. A communicating tube is fixedly connected through the inner wall of the annular block. The circular ring plate is fixedly connected with the side wall of the annular block.

[0011] Preferably, the first gear and the second gear are meshed and connected. The sliding column is slidably connected to the inner side wall of the rectangular cylinder.

[0012] Preferably, the first conical wheel and the driving conical wheel are meshed and connected. The second conical wheel and the driving conical wheel are meshed and connected.

[0013] Preferably, a positioning block is rotatably installed at one end of the X-shaped positioning telescopic frame away from the circular plate. The positioning block is slidably connected to the positioning plate, and one end of the X-shaped positioning telescopic frame away from the positioning nut is rotatably connected to the positioning plate.

[0014] Preferably, an adjusting block is rotatably installed at one end of the X-shaped adjusting telescopic frame away from the circular ring plate. The adjusting block is slidably connected to the adjusting plate, and one end of the X-shaped adjusting telescopic frame away from the adjusting nut is rotatably connected to the adjusting plate.

[0015] Preferably, the component mechanism includes a back plate frame fixedly connected to the machine base. A top plate is installed on the back plate frame, and an electric push rod is installed on the bottom wall of the top plate. The movable end of the electric push rod is fixedly connected to an inverted U-shaped plate.

[0016] Preferably, a right electric universal sliding table and a left electric universal sliding table are slidably installed on the machine base. Electric clamps are installed on the side walls of the right electric universal sliding table and the left electric universal sliding table, and both the right electric universal sliding table and the left electric universal sliding table have a self-locking function.

[0017] Compared with the existing technology, the advantages of the present invention are as follows:

[0018] 1. By setting structures such as a reciprocating threaded pipe, a positioning plate, and a positioning nut, the motor is turned on, so that multiple positioning plates center and lift the servo valve body during movement, making the holes on the side of the servo valve body coaxial with the reciprocating threaded pipe, completing the preliminary centering operation, and then using the left electric universal sliding table to stably clamp the positioned servo valve body;

[0019] 2. When the scraper abuts against the inner wall of the hole on the side of the receiver, the output end of the motor is reversed. During the rotation of the threaded rod, the threaded rod will drive the box body fixedly connected to it to rotate, and the box body will drive the scraper to rotate synchronously through the rectangular cylinder, the magnetic spring, and the sliding column. Then the scraper will scrape the debris adhering to the inner wall of the hole on the side of the receiver, avoiding affecting the subsequent use effects of the servo valve and the receiver;

[0020] 3. In the above process, by setting structures such as a limiting rod, a reciprocating lead screw, and a nut sleeve, the nut sleeve threadedly connected to the side wall of the reciprocating lead screw will move horizontally, and the nut sleeve will drive the scraper to move synchronously through the rectangular cylinder, the magnetic spring, and the sliding column. Then the scraper can continuously rotate during the horizontal movement along the inner wall of the hole on the side of the receiver, thereby increasing the cleaning range of the inner wall of the hole on the side of the receiver and improving the cleaning effect of its interior;

[0021] 4. Since one end of the connecting pipe is fixedly connected to the external fan, after starting the external fan, the fan will extract air from the connecting pipe, and then extract air through the annular groove and the hole on the side of the receiver through the L-shaped pipe, which can extract the impurities scraped off by the scraper and prevent the blockage of the holes of the receiver caused by the remaining of these impurities;

[0022] 5. After completing the above operations, insert multiple adjusting plates into the holes on the side wall of the receiver, and still make the output end of the motor rotate in the reverse direction, so that each adjusting plate is in contact with the inner wall of the hole on the side wall of the receiver. Since the reciprocating threaded pipe and the reciprocating threaded rod are coaxially arranged, the centering operation of the connection between the servo valve and the receiver can be completed at this time, which is convenient for continuing to complete the assembly and installation of the servo valve and the receiver. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the external structure of a servo valve automatic centering device proposed by the present invention;

[0024] Figure 2 It is a schematic diagram of the external structure of the centering mechanism in a servo valve automatic centering device proposed by the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the box in a servo valve automatic centering device proposed by the present invention;

[0026] Figure 4 It is a schematic diagram of the internal structure of the rectangular cylinder in a servo valve automatic centering device proposed by the present invention;

[0027] Figure 5 It is a schematic diagram of the installation relationship between the first one-way bearing and the second one-way bearing in a servo valve automatic centering device proposed by the present invention;

[0028] Figure 6 It is a schematic diagram of the internal structure of the annular groove in a servo valve automatic centering device proposed by the present invention;

[0029] Figure 7 It is a schematic diagram of the connection relationship between the L-shaped pipe and the reciprocating threaded rod in a servo valve automatic centering device proposed by the present invention.

[0030] In the figure: 1. Machine base; 2. Left electric universal sliding table; 3. Right electric universal sliding table; 4. Backplate frame; 5. Top plate; 6. Electric push rod; 7. Inverted U-shaped plate; 8. Reciprocating threaded pipe; 9. Positioning nut; 10. Circular plate; 11. X-shaped positioning telescopic frame; 12. Positioning block; 13. Positioning plate; 14. First one-way bearing; 15. First conical wheel; 16. Reciprocating threaded rod; 17. Ring plate; 18. X-shaped adjusting telescopic frame; 19. Adjusting nut; 20. Adjusting plate; 21. Limit rod; 22. Ring block; 23. Ring groove; 24. L-shaped pipe; 25. Connecting pipe; 27. First gear; 28. Box body; 29. Through hole; 30. Reciprocating lead screw; 31. Second gear; 32. Nut sleeve; 34. Rectangular cylinder; 35. Magnetic spring; 36. Slide column; 37. Scraper; 38. Second one-way bearing; 39. Second conical wheel; 40. Motor; 41. Driving conical wheel; 42. Restricting rod. Detailed implementation manner

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Refer to Figure 1 - Figure 7 , a servo valve automatic centering device, including a machine base 1, a centering mechanism is installed on the machine base 1 through a component mechanism, the centering mechanism includes an inverted U-shaped plate 7, a reciprocating threaded pipe 8 and a reciprocating threaded rod 16 are rotatably connected through the side wall of the inverted U-shaped plate 7 (in combination with Figure 2 and Figure 5 ), one end of the reciprocating threaded pipe 8 is rotatably connected to a circular plate 10, a positioning nut 9 is threadedly connected to the side wall of the reciprocating threaded pipe 8, a plurality of X-shaped positioning telescopic frames 11 are jointly installed on the side walls of the positioning nut 9 and the circular plate 10, a positioning plate 13 is provided on the X-shaped positioning telescopic frame 11, the X-shaped positioning telescopic frame 11 is a prior art and will not be elaborated here, a ring plate 17 is provided on the side wall of the reciprocating threaded rod 16, an adjusting nut 19 is threadedly connected to the side wall of the reciprocating threaded rod 16, a plurality of X-shaped adjusting telescopic frames 18 are jointly installed on the side walls of the adjusting nut 19 and the ring plate 17, an adjusting plate 20 is provided on the X-shaped adjusting telescopic frame 18, and a first one-way bearing 14 is fixedly connected to the side wall of the reciprocating threaded pipe 8 (as Figure 5As shown, a first conical wheel 15 is installed on the outer ring part of the first one-way bearing 14. A second one-way bearing 38 is fixedly connected to the side wall of the reciprocating threaded rod 16. A second conical wheel 39 is installed on the outer ring part of the second one-way bearing 38. A motor 40 is installed on the inner wall of the inverted U-shaped plate 7. The output end of the motor 40 is fixedly connected to a driving conical wheel 41. A limiting rod 21 is installed on the side wall of the positioning nut 9. The limiting rod 21 penetrates and slides through the side wall of the inverted U-shaped plate 7. Under the action of the limiting rod 21, the positioning nut 9 will not rotate on its own.

[0033] A box body 28 is fixedly connected to the side wall of the reciprocating threaded rod 16 (as Figure 3 and Figure 4 shown). A through hole 29 is opened on the side wall of the box body 28. A rectangular cylinder 34 is slidably connected to the inner wall of the through hole 29. A reciprocating lead screw 30 is rotatably connected through the inner wall of the box body 28. A nut sleeve 32 is threadedly connected to the side wall of the reciprocating lead screw 30. The nut sleeve 32 is fixedly connected to the rectangular cylinder 34. Since the rectangular cylinder 34 slides on the inner wall of the through hole 29, the nut sleeve 32 will not rotate on its own. A second gear 31 is fixedly connected to the side wall of the reciprocating lead screw 30. A first gear 27 is sleeved and rotatably connected to the side wall of the reciprocating threaded rod 16. Limiting rods 42 are symmetrically installed on the side wall of the adjusting nut 19. The limiting rods 42 penetrate and slide through the first gear 27.

[0034] A magnetic spring 35 is fixedly connected to the inner wall of the rectangular cylinder 34. The magnetic spring 35 is a prior art. After the magnetic spring 35 is energized, due to electromagnetic induction, the magnetic spring 35 interacts with the current in the external magnetic field to generate different magnitudes of pulling forces to control the stretching deformation and motion state of the magnetic spring 35, that is, the magnetic spring 35 will contract after being energized. The other end of the magnetic spring 35 is fixedly connected to a sliding column 36. A scraping plate 37 is fixedly installed at the other end of the sliding column 36.

[0035] An annular block 22 is fixedly installed on the side wall of the inverted U-shaped plate 7. The annular block 22 is hermetically slidably connected to the side wall of the reciprocating threaded rod 16. An annular groove 23 is opened on the inner side wall of the annular block 22 (as Figure 6 shown). An L-shaped pipe 24 is embedded and installed in the inner wall of the reciprocating threaded rod 16 (as Figure 7 shown). A part of the pipe body of the L-shaped pipe 24 is coaxial with the reciprocating threaded rod 16. One end of the L-shaped pipe 24 is located inside the annular groove 23, and the other end of the L-shaped pipe 24 is located outside the reciprocating threaded rod 16. A communicating pipe 25 is fixedly connected through the inner wall of the annular block 22. When the reciprocating threaded rod 16 drives the L-shaped pipe 24 to rotate, the other end of the L-shaped pipe 24 is always located inside the annular groove 23, thereby facilitating the communicating pipe 25 to suck impurities from the inside of the L-shaped pipe 24 through the annular groove 23. The circular ring plate 17 is fixedly connected to the side wall of the annular block 22.

[0036] The reciprocating threaded tube 8 is sleeved on the side wall of the reciprocating threaded rod 16. The first gear 27 and the second gear 31 are meshed and connected. The sliding column 36 is slidably connected to the inner side wall of the rectangular cylinder 34.

[0037] The first conical wheel 15 and the driving conical wheel 41 are meshed and connected. The second conical wheel 39 and the driving conical wheel 41 are meshed and connected.

[0038] One end of the X-shaped positioning telescopic frame 11 away from the circular plate 10 is rotatably installed with a positioning block 12. The positioning block 12 and the positioning plate 13 are slidably connected. The setting of the positioning block 12 avoids the movement interference of the X-shaped positioning telescopic frame 11. One end of the X-shaped positioning telescopic frame 11 away from the positioning nut 9 is rotatably connected to the positioning plate 13.

[0039] One end of the X-shaped adjusting telescopic frame 18 away from the circular ring plate 17 is rotatably installed with an adjusting block. The adjusting block and the adjusting plate 20 are slidably connected, avoiding the movement interference of the X-shaped adjusting telescopic frame 18. One end of the X-shaped adjusting telescopic frame 18 away from the adjusting nut 19 is rotatably connected to the adjusting plate 20.

[0040] The component mechanism includes a back plate frame 4 fixedly connected to the machine base 1. A top plate 5 is installed on the back plate frame 4. An electric push rod 6 is installed on the inner wall of the top plate 5. The movable end of the electric push rod 6 is fixedly connected to an inverted U-shaped plate 7.

[0041] A right electric universal sliding table 3 and a left electric universal sliding table 2 are slidably installed on the machine base 1. The right electric universal sliding table 3 and the left electric universal sliding table 2 are prior arts, capable of moving a fixed object in different directions along a vertical plane and having the ability to self-lock. Both the right electric universal sliding table 3 and the left electric universal sliding table 2 have a self-locking function at different sliding positions. Electric clamps (not shown in the figure) are installed on the side walls of both the right electric universal sliding table 3 and the left electric universal sliding table 2.

[0042] In the present invention, the user turns on the electric push rod 6. The movable end of the electric push rod 6 drives the inverted U-shaped plate 7 fixedly connected thereto to move downward along the vertical direction for a certain distance. The user holds the servo valve body and continuously approaches the plurality of positioning plates 13 until the plurality of positioning plates 13 extend into the holes on the side of the servo valve body.

[0043] Turn on the motor 40. The motor 40 is a forward and reverse motor. When the output end of the motor 40 rotates clockwise, the output end of the motor 40 drives the driving conical wheel 41 fixedly connected thereto to rotate synchronously. Then, the driving conical wheel 41 will drive the first conical wheel 15 and the second conical wheel 39 engaged therewith to rotate. At this time, under the action of the first one-way bearing 14, the first one-way bearing 14 will drive the reciprocating threaded pipe 8 fixedly connected thereto to rotate, while the second one-way bearing 38 will not drive the reciprocating threaded rod 16 fixedly connected thereto to rotate. Under the limiting action of the limiting rod 21, when the reciprocating threaded pipe 8 rotates, the positioning nut 9 threadedly connected to the side wall of the reciprocating threaded pipe 8 will move a certain distance. Then, the positioning nut 9 will drive one end of the X-shaped positioning telescopic frame 11 rotatably connected to its side wall to move a certain distance. Then, the X-shaped positioning telescopic frame 11 will drive the positioning plate 13 connected thereto to move outward a certain distance, so that the positioning plate 13 moves to abut against the inner side wall of the hole on the side of the servo valve body. During this process, the plurality of positioning plates 13 will center and lift the servo valve body during movement, so that the hole on the side of the servo valve body is coaxial with the reciprocating threaded pipe 8. Then, use the electric clamp on the side of the left electric universal slide 2 to stably clamp and fix the positioned servo valve body at this position.

[0044] Then, the user installs the receiver on the side of the right electric universal slide 3 through the electric clamp, and makes the right electric universal slide 3 move in the direction close to the servo valve body until the scraper 37 enters the hole on the side of the receiver. The controller cuts off the power supply to the magnetic spring 35. Then, the powered-off magnetic spring 35 will drive the scraper 37 to move a certain distance, so that the scraper 37 abuts against the inner wall of the hole on the side of the receiver.

[0045] Turn on the motor 40 and make the output end of the motor 40 rotate in the reverse direction. Then, the output end of the motor 40 drives the driving conical wheel 41 to rotate in the reverse direction, and the driving conical wheel 41 drives the first conical wheel 15 and the second conical wheel 39 to rotate in the reverse direction. Then, under the action of the first one-way bearing 14, the reciprocating threaded pipe 8 will not rotate at this time, while under the action of the second one-way bearing 38, the reciprocating threaded rod 16 starts to rotate. At this time, the adjusting nut 19 reciprocates on the side wall of the reciprocating threaded rod 16. Since the plurality of adjusting plates 20 are located outside the receiver, the movement of the adjusting plates 20 will not cause interference. Then, during the rotation of the reciprocating threaded rod 16, the reciprocating threaded rod 16 will drive the box body 28 fixedly connected thereto to rotate, and the box body 28 will drive the scraper 37 to rotate synchronously through the rectangular cylinder 34, the magnetic spring 35, and the sliding column 36. Then, the scraper 37 will scrape the debris adhered to the inner wall of the hole on the side of the receiver to avoid affecting the use effect of the subsequent servo valve and receiver after assembly.

[0046] At this time, under the action of multiple limiting rods 42, the first gear 27 is in a static state. The second gear 31 meshes with the first gear 27. Then, when the box body 28 drives the reciprocating lead screw 30 to rotate around the reciprocating threaded rod 16 as the axis, the second gear 31 will drive the reciprocating lead screw 30 to rotate continuously. Then, the nut sleeve 32 threadedly connected to the side wall of the reciprocating lead screw 30 will move horizontally. The nut sleeve 32 drives the scraping plate 37 to move synchronously through the rectangular cylinder 34, the magnetic spring 35, and the sliding column 36. Then, the scraping plate 37 can rotate continuously during the process of moving horizontally along the inner wall of the hole on the side of the receiver. That is, the movement of the scraping plate 37 presents a spiral trajectory, thereby increasing the cleaning range of the inner wall of the hole on the side of the receiver and improving the cleaning effect of its interior. One end of the communicating pipe 25 is fixedly communicated with an external fan. Then, after starting the external fan, the fan will extract air from the communicating pipe 25, and then extract air through the annular groove 23 and the L-shaped pipe 24 in the hole on the side of the receiver, and can extract the impurities scraped off by the scraping plate 37 to avoid blockage of the hole of the receiver caused by the remaining of these impurities.

[0047] After completing the above operations, insert multiple adjusting plates 20 into the holes on the side wall of the receiver. Then, still make the output end of the motor 40 rotate in the reverse direction. Then, during the rotation of the reciprocating threaded rod 16, the reciprocating threaded rod 16 will make the adjusting nut 19 threadedly connected to its side wall move a certain distance. Then, the adjusting nut 19 will drive multiple X-shaped adjustable telescopic frames 18 arranged on its side wall to move outward synchronously for a certain distance, so that each adjusting plate 20 is in contact with the inner wall of the hole on the side wall of the receiver. The electric clamp on the side of the right electric universal slide table 3 adapts and adjusts the position until it is coaxial and then locks. Since the reciprocating threaded pipe 8 and the reciprocating threaded rod 16 are arranged coaxially, the centering operation of the connection between the servo valve and the receiver can be completed at this time. Subsequently, make the left electric universal slide table 2 and the right electric universal slide table 3 move away from each other for a certain distance. Then, the left electric universal slide table 2 will drive the positioned servo valve body to move horizontally to the left for a certain distance, while the right electric universal slide table 3 will drive the receiver to move horizontally to the right for a certain distance. Since the positioning plate 13 and the inner wall of the servo valve body are in linear contact and the sliding resistance is small, the servo valve body and multiple positioning plates 13 can slide away from each other. Similarly, the receiver and multiple adjusting plates 20 can slide away from each other. Then, drive the inverted U-shaped plate 7 to move upward for a certain distance through the electric push rod 6. By controlling the motor 40, make the reciprocating threaded rod 16 or the reciprocating threaded pipe 8 rotate, and then drive the positioning plate 13 and the adjusting plate 20 to move in the reverse direction for reset. Finally, make the left electric universal slide table 2 and the right electric universal slide table 3 move towards each other until they fit together to complete the assembly and installation of the servo valve and the receiver.

[0048] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention any equivalent replacement or change made according to the technical solution and inventive concept of the present invention.

Claims

1. A servo valve automatic centering device, comprising a base (1), characterized in that: The machine base (1) is provided with a centering mechanism through a component mechanism, the centering mechanism comprising an inverted shaped plate (7), a reciprocating threaded tube (8) and a reciprocating threaded rod (16) being rotatably connected through the side wall of the inverted shaped plate (7), a circular plate (10) being rotatably connected to one end of the reciprocating threaded tube (8), a positioning nut (9) being threadedly connected to the side wall of the reciprocating threaded tube (8), a plurality of X-shaped positioning telescopic frames (11) being jointly installed on the positioning nut (9) and the side wall of the circular plate (10), a positioning plate (13) being provided on the X-shaped positioning telescopic frame (11), a circular ring plate (17) being provided on the side wall of the reciprocating threaded rod (16), an adjusting nut (19) being threadedly connected to the side wall of the reciprocating threaded rod (16) ), the adjusting nut (19) and the side wall of the annular plate (17) are jointly mounted with a plurality of X-shaped adjusting telescopic frames (18), an adjusting plate (20) is arranged on the X-shaped adjusting telescopic frame (18), a first conical wheel (15) is mounted on the side wall of the reciprocating threaded tube (8) via a first one-way bearing (14), a second conical wheel (39) is mounted on the side wall of the reciprocating threaded rod (16) via a second one-way bearing (38), a motor (40) is mounted on the inner wall of the inverted shaped plate (7), an output end of the motor (40) is fixedly connected with a driving conical wheel (41), a limiting rod (21) is mounted on the side wall of the positioning nut (9), and the limiting rod (21) and the side wall of the inverted shaped plate (7) penetrate and slide.

2. The automatic centering device for a servo valve according to claim 1, characterized in that: The side wall of the reciprocating threaded rod (16) is fixedly connected to a box body (28), a through hole (29) is formed on the side wall of the box body (28), a rectangular tube (34) is slidably connected to the inner wall of the through hole (29), a reciprocating screw (30) is rotatably connected to the inner wall of the box body (28), a screw sleeve (32) is threadedly connected to the side wall of the reciprocating screw (30), the screw sleeve (32) and the rectangular tube (34) are fixedly connected, a second gear (31) is fixedly connected to the side wall of the reciprocating threaded rod (16), a first gear (27) is rotatably sleeved on the side wall of the reciprocating threaded rod (16), and a limiting rod (42) is symmetrically installed on the side wall of the adjusting nut (19), and the limiting rod (42) and the first gear (27) are slidably penetrated.

3. The automatic centering device for a servo valve according to claim 2, characterized in that: A magnetic spring (35) is fixedly connected to the inner wall of the rectangular tube (34), the other end of the magnetic spring (35) is fixedly connected to a sliding column (36), and the other end of the sliding column (36) is fixedly mounted with a scraper (37).

4. The automatic centering device for a servo valve according to claim 1, characterized in that: An annular block (22) is fixedly mounted on the side wall of the inverted shaped plate (7), and the annular block (22) and the side wall of the reciprocating threaded rod (16) are sealed and slidably mounted. An annular groove (23) is formed on the inner side wall of the annular block (22), and an L-shaped tube (24) is embedded and mounted on the inner wall of the reciprocating threaded rod (16), one end of the L-shaped tube (24) is located inside the annular groove (23), and the other end of the L-shaped tube (24) is located outside the reciprocating threaded rod (16). A connecting tube (25) is fixedly connected to and penetrates the inner wall of the annular block (22), and the circular ring plate (17) and the side wall of the annular block (22) are fixedly connected.

5. The automatic centering device for a servo valve according to claim 3, characterized in that: The first gear (27) and the second gear (31) are meshed and connected, and the sliding column (36) is slidably connected to the inner wall of the rectangular tube (34).

6. The automatic centering device for a servo valve according to claim 1, characterized in that: The first conical wheel (15) is meshedly connected to the driving conical wheel (41), and the second conical wheel (39) is meshedly connected to the driving conical wheel (41).

7. The automatic centering device for a servo valve according to claim 1, characterized in that: A positioning block (12) is rotatably mounted on one end of the X-shaped positioning telescopic frame (11) away from the circular plate (10); the positioning block (12) is slidably connected to the positioning plate (13); and one end of the X-shaped positioning telescopic frame (11) away from the positioning nut (9) is rotatably connected to the positioning plate (13).

8. The automatic centering device for a servo valve according to claim 1, characterized in that: An adjusting block is rotatably mounted on one end of the X-shaped adjusting telescopic frame (18) away from the annular plate (17); the adjusting block is slidably connected to the adjusting plate (20); and one end of the X-shaped adjusting telescopic frame (18) away from the adjusting nut (19) is rotatably connected to the adjusting plate (20).

9. The automatic centering device for a servo valve according to claim 1, characterized in that: The assembly mechanism comprises a back plate frame (4) fixedly connected to a machine base (1); a top plate (5) is mounted on the back plate frame (4); an electric push rod (6) is mounted on the bottom wall of the top plate (5); and a movable end of the electric push rod (6) is fixedly connected to an inverted U-shaped plate (7).

10. The automatic centering device for a servo valve according to claim 1, characterized in that: A right electric universal slide (3) and a left electric universal slide (2) are slidably connected to the machine base (1), and electric clamps are installed on the side walls of the right electric universal slide (3) and the left electric universal slide (2).

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