High-precision adjusting tool for valve element screw of proportional servo valve

Abstract

The utility model provides a high-precision adjusting tool for a valve element screw of a proportional servo valve. The high-precision adjusting tool comprises a double-clamping-point rotating zero setting tool and a nut screwing tool. Two clamping point structures are arranged at the end part of the double-clamping-point rotary zeroing tool and are matched with two clamping grooves of the proportional servo valve sensor; an inner hexagonal countersunk head structure is arranged at the end of the nut screwing tool and matched with a nut of a valve element screw of the proportional servo valve. A first through hole is formed in the center of the double-clamping-point rotating zero setting tool, the inner diameter of the first through hole is in transition fit with the outer diameter of the nut screwing tool, and the nut screwing tool is detachably connected with the double-clamping-point rotating zero setting tool in a sliding mode through the first through hole. According to the utility model, the structure is simple and reasonable, the integrity is strong, the value of the proportional servo valve sensor can be accurately adjusted and set, and the zero adjustment precision of the proportional servo valve sensor is effectively improved; a pure metal structure is adopted and can be repeatedly used for a long time; the preparation is simple, the price is low, and the popularization and application prospect is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of proportional servo valve regulation, and more specifically, to a high-precision regulation tool for the spool screw of a proportional servo valve. Background Art

[0002] Due to its very high control precision and response frequency, the proportional servo valve is widely used in industrial production. It is precisely because of the excellent performance of the proportional servo valve itself that very high precision requirements are also imposed on its own processing and manufacturing, especially the mechanical processing dimensions of the spool and valve body (valve sleeve) and the precision of the mating dimensions.

[0003] The full stroke of the spool of a conventional six-way proportional servo valve is only less than 2 mm. Then, for the mating setting between the spool and the valve body, that is, the precision requirement for zero position adjustment is extremely high, far less than 1% of the stroke, that is, less than 0.02 mm (2 mm × 1%).

[0004] However, at present, there is no professional regulation tool for the spool screw of a proportional servo valve. The regulation using conventional tools such as wrenches and pliers not only makes it difficult to achieve accurate adjustment precision, but also easily causes the screw to rotate when tightening the lock nut after adjustment, resulting in zero position deviation and reducing the precision. Since it is impossible to ensure that there will be no zero position deviation during the locking process of the nut (nut) after reaching the adjustment precision, the proportional servo valve often cannot be effectively used due to not meeting the required precision.

[0005] Therefore, there is an urgent need to design and develop an efficient and convenient regulation tool for the spool screw of a proportional servo valve to solve the above-mentioned defect problems in the regulation effect of the spool screw of the proportional servo valve at the present stage. Summary of the Utility Model

[0006] In view of this, the purpose of the present utility model is to develop and design a high-precision regulation tool for the spool screw of a proportional servo valve for zero position setting of the proportional servo valve. It adopts a two-part tool combination operation of double-card point rotation zero adjustment and nut screwing, with strong integrity, and will not change during the process of tightening the nut, and can accurately adjust and set the value of the proportional servo valve sensor, thereby improving the zero position adjustment precision of the proportional servo valve sensor; and it is simple to manufacture, low in price, and conducive to popularization and application.

[0007] The present utility model provides a high-precision regulation tool for the spool screw of a proportional servo valve, which includes the following two parts: a double-card point rotation zero adjustment tool and a nut screwing tool; wherein, two card point structures are arranged at the end of the double-card point rotation zero adjustment tool, and the two card point structures are adapted to two card slots of the proportional servo valve sensor; an internal hexagon countersunk head structure is arranged at the end of the nut screwing tool, and the internal hexagon countersunk head structure is adapted to the nut of the spool screw of the proportional servo valve;

[0008] The nut tightening tool is used to loosen and tighten the hexagonal nut (nut) on the adjusted proportional servo valve sensor; the double-card point rotation zero adjustment tool uses two card point structures to cooperate with the two card slots on the proportional servo valve sensor to position or tighten the proportional servo valve sensor.

[0009] A first through hole is provided at the center of the dual-clamping point rotary zeroing tool, the inner diameter of the first through hole is transitionally matched with the outer diameter of the nut screwing tool, and the nut screwing tool is detachably and slidably connected to the dual-clamping point rotary zeroing tool through the first through hole.

[0010] Furthermore, the outer diameter surface of the end of the dual-clamping point rotary zero adjustment tool away from the two clamping point structures is provided with a transverse threaded through hole in a normal orthogonal direction to the first through hole, and a fixing screw is detachably inserted through the transverse threaded through hole. The dual-clamping point rotary zero adjustment tool and the nut tightening tool can be pressed and positioned by the fixing screw.

[0011] Furthermore, a chamfer structure is provided on the connecting edge between the end surface of one end of the double-clamping-point rotary zero adjustment tool away from the two clamping-point structures and the first through hole, and the chamfer structure facilitates the nut-tightening tool to slide into the first through hole.

[0012] Furthermore, a second through hole is provided at the center of the nut tightening tool.

[0013] The second through hole facilitates the operator to check the rotation state of the nut of the proportional servo valve core screw.

[0014] Furthermore, the end of the nut screwing tool away from the hexagonal countersunk structure is provided with a transverse optical through hole in a normal direction orthogonal to the second through hole, and a rotating lever is detachably inserted through the transverse optical through hole. The rotating lever can lengthen the rotating force arm to facilitate the screwing operation.

[0015] Preferably, the transverse optical through holes are evenly distributed in two groups along the circumferential direction of the nut tightening tool, so that the operator can choose to change the insertion angle of the rotating rod according to the rotation angle of the nut tightening tool.

[0016] Furthermore, the circumferential side edges of each of the clamping point structures are transitionally matched with the circumferential side edges of the clamping groove of the proportional servo valve sensor.

[0017] Transition fit is suitable for relatively static connections that require precise positioning and are easy to disassemble and assemble. Transition fit will not cause excessive gaps between the card point structure and the card slot, thus avoiding errors in adjusting the zero position.

[0018] Furthermore, the heights of the two clamping point structures along the axial direction of the dual clamping point rotation zeroing tool are equal, and the height of each clamping point structure along the axial direction of the dual clamping point rotation zeroing tool is ≥ the depth of each clamping groove along the axial direction of the proportional servo valve sensor.

[0019] The height of the card point structure is greater than or equal to the depth of the card slot, so that the card slot can be completely embedded in the card point structure, increasing the stability and reliability of the connection, and improving the alignment of the double card point rotary zero adjustment tool and the proportional servo valve sensor, further ensuring the accuracy of the zero position adjustment.

[0020] Furthermore, an outer diameter surface of an end of the nut tightening tool facing away from the internal hexagonal countersunk structure is provided with a knurling structure.

[0021] The knurled structure increases the friction during hand-tightening operation, making it easier to tighten the nut when a large torque is required.

[0022] Furthermore, an outer diameter surface of the nut tightening tool is provided with an outer circle polishing structure, the outer circle polishing structure and the nut tightening tool are an integrated structure, and the polishing degree of the outer circle polishing structure is Ra0.2-0.3μm.

[0023] Furthermore, the inner diameter surface of the double-clamping-point rotary zeroing tool is provided with an inner circle polishing structure, the inner circle polishing structure and the double-clamping-point rotary zeroing tool are an integrated structure, and the polishing degree of the inner circle polishing structure is Ra0.2-0.3μm.

[0024] The outer circle polishing structure and the inner circle polishing structure prevent friction between the nut tightening tool and prevent retention, jamming and the like from occurring during the sliding stroke of the nut tightening tool in the first through hole of the double-clamping-point rotary zeroing tool. The nut tightening tool can be accurately pushed onto the nut of the proportional servo valve core screw for alignment and tightening.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] The utility model discloses a proportional servo valve core screw high-precision adjustment tool with simple and reasonable structure, adopts double-clamp point rotation zero adjustment and nut twisting two-part tool combination operation, has strong integrity, will not change during the process of locking the nut, can accurately adjust the set value of the proportional servo valve sensor, and effectively improves the zero position adjustment accuracy of the proportional servo valve sensor; the proportional servo valve core screw high-precision adjustment tool adopts a pure metal structure, can achieve long-term repeated use, and has good reliability; it is simple to manufacture, low in price, and has broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiments. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model.

[0028] In the drawings:

[0029] Figure 1 It is a component structure diagram of a high-precision adjustment tool for the spool screw of a proportional servo valve of the present utility model;

[0030] Figure 2 It is a structural operation schematic diagram of a high-precision adjustment tool for the spool screw of a proportional servo valve in an embodiment of the present utility model.

[0031] The reference numerals in the drawings are denoted as:

[0032] 1. Double-card point rotation zero adjustment tool, 2. Nut screwing tool,

[0033] 3. Hexagon socket countersunk head structure, 4. First through hole,

[0034] 5. Chamfer structure, 6. Second through hole,

[0035] 7. Transverse threaded through hole, 8. Transverse light through hole,

[0036] 9. Card point structure, 10. Proportional servo valve sensor.

[0037] 11. Nut. Specific embodiments

[0038] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "the" and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0040] It should be understood that although the terms first, second, and third may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0041] An embodiment of the present utility model provides a high-precision adjustment tool for the spool screw of a proportional servo valve. Refer to Figure 1 、 2 As shown, it includes the following two parts: a double-card-point rotation zero-adjustment tool 1 and a nut screwing tool 2; wherein, two card-point structures 9 are provided at the end of the double-card-point rotation zero-adjustment tool 1, and the two card-point structures 9 are adapted to two card slots of the proportional servo valve sensor 10; an internal hexagonal countersunk head structure 3 is provided at the end of the nut screwing tool 2, and the internal hexagonal countersunk head structure 3 is adapted to the nut 11 of the spool screw of the proportional servo valve.

[0042] The nut screwing tool 2 is used to loosen and tighten the external hexagonal nut (nut) on the proportional servo valve sensor to be adjusted; the double-card-point rotation zero-adjustment tool 1 uses the two card-point structures 9 to cooperate with the two card slots on the proportional servo valve sensor for positioning or screwing the proportional servo valve sensor.

[0043] There is an interference fit between the circumferential side of each card-point structure 9 and the circumferential side of the card slot of the proportional servo valve sensor. The interference fit will not cause too large a gap between the card-point structure 9 and the card slot, avoiding the error of adjusting the zero position. The heights of the two card-point structures 9 in the axial direction of the double-card-point rotation zero-adjustment tool 1 are equal, and the height of each card-point structure 9 in the axial direction of the double-card-point rotation zero-adjustment tool 1 ≥ the depth of each card slot in the axial direction of the proportional servo valve sensor 10. The height of the card-point structure 9 is greater than or equal to the depth of the card slot, so that the card slot can be completely embedded by the card-point structure 9, increasing the stability and reliability of the connection, and improving the centering degree of the double-card-point rotation zero-adjustment tool 1 and the proportional servo valve sensor 10, further ensuring the accuracy of adjusting the zero position.

[0044] A first through hole 4 is provided at the center of the double-card-point rotation zero-adjusting tool 1. The inner diameter of the first through hole 4 is in transitional fit with the outer diameter of the nut screwing tool 2. The nut screwing tool 2 is detachably and slidably connected to the double-card-point rotation zero-adjusting tool 1 through the first through hole 4. On the outer diameter surface of one end of the double-card-point rotation zero-adjusting tool 1 departing from the two card-point structures, a transverse threaded through hole 7 in a direction normal and orthogonal to the first through hole 4 is provided. A set screw is detachably inserted through the transverse threaded through hole 7. The double-card-point rotation zero-adjusting tool 1 and the nut screwing tool 2 can be pressed and positioned through the set screw. On the connecting edge between the end face of one end of the double-card-point rotation zero-adjusting tool 1 departing from the two card-point structures and the first through hole 4, a chamfer structure 5 is provided. The chamfer structure 5 facilitates the nut screwing tool 2 to slide into the first through hole 4.

[0045] A second through hole 6 is provided at the center of the nut screwing tool 2. The second through hole 6 facilitates the operator to observe the rotation state of the nut of the proportional servo valve spool screw. At one end of the nut screwing tool 2 departing from the internal hexagonal countersunk head structure 3, a transverse light through hole 8 in a direction normal and orthogonal to the second through hole 6 is provided. A rotating bar is detachably inserted through the transverse light through hole 8. Two groups of transverse light through holes are evenly distributed along the circumferential direction of the nut screwing tool. According to the rotation angle of the nut screwing tool, the insertion angle of the rotating bar can be changed. The rotating bar lengthens the rotation force arm, increases the rotation torque, and facilitates the screwing operation. On the outer diameter surface of one end of the nut screwing tool 2 departing from the internal hexagonal countersunk head structure 3, a knurling structure is provided. The knurling structure increases the friction during the hand-screwing operation and facilitates the screwing operation when the torque required for screwing the nut is large.

[0046] An outer circle polishing structure is provided on the outer diameter surface of the nut screwing tool 2. The outer circle polishing structure and the nut screwing tool 2 are of an integral structure, and the polishing degree of the outer circle polishing structure is Ra0.2 - 0.3μm. An inner circle polishing structure is provided on the inner diameter surface of the double-card-point rotation zero-adjusting tool 1. The inner circle polishing structure and the double-card-point rotation zero-adjusting tool 1 are of an integral structure, and the polishing degree of the inner circle polishing structure is Ra0.2 - 0.3μm. The outer circle polishing structure and the inner circle polishing structure prevent friction between each other during the sliding stroke of the nut screwing tool 2 in the first through hole 4 of the double-card-point rotation zero-adjusting tool 1, and phenomena such as sticking and jamming will not occur, and the nut screwing tool 2 can be accurately pushed onto the nut 11 of the proportional servo valve spool screw for alignment and screwing.

[0047] The working principle and operation method of the high-precision adjusting tool for the proportional servo valve spool screw provided in this embodiment are as follows:

[0048] (1) As Figure 2 shown, connect the double-card-point rotation zero-adjusting tool 1 and the nut screwing tool 2 to the end part with the nut 11 of the proportional servo valve sensor 10 in sequence.

[0049] (2) Keep one hand pressing the dual-card point rotation zero-adjustment tool 1 firmly against the proportional servo valve sensor 10 without moving; with the other hand, rotate the nut screwing tool 2 counterclockwise to loosen the nut 11 of the proportional servo valve sensor 10.

[0050] (3) Keep the nut screwing tool 2 still with one hand. According to the adjustment requirement, rotate the dual-card point rotation zero-adjustment tool 1 clockwise or counterclockwise with the other hand until the zero position is adjusted to the required set value.

[0051] (4) Keep the position of the dual-card point rotation zero-adjustment tool 1 still with one hand. Rotate the nut screwing tool 2 clockwise with the other hand to lock the nut 11 and ensure that the accurate position after adjusting the zero position remains unchanged.

[0052] During the operation of locking the nut 11, keep the dual-card point rotation zero-adjustment tool 1 still. If the dual-card point rotation zero-adjustment tool 1 moves, the accurate position of the set value may also change. This is also the key reason why the high-precision adjustment tool for the proportional servo valve spool screw provided by the embodiment of the present invention can accurately adjust the value of the set proportional servo valve sensor and will not change during the process of locking the nut 11 compared with the traditional conventional tool.

[0053] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0054] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. High-precision adjustment tool for the valve core screw of the proportional servo valve, characterized in that: The invention comprises the following two parts: a double-clamping point rotary zeroing tool and a nut screwing tool; wherein the end of the double-clamping point rotary zeroing tool is provided with two clamping point structures, and the two clamping point structures are adapted to the two clamping grooves of the proportional servo valve sensor; the end of the nut screwing tool is provided with a hexagonal countersunk structure, and the hexagonal countersunk structure is adapted to the nut of the valve core screw of the proportional servo valve; A first through hole is provided at the center of the dual-clamping point rotary zeroing tool, the inner diameter of the first through hole is transitionally matched with the outer diameter of the nut screwing tool, and the nut screwing tool is detachably and slidably connected to the dual-clamping point rotary zeroing tool through the first through hole.

2. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1 is characterized in that: The outer diameter surface of one end of the dual-clamping point rotary zero adjustment tool away from the two clamping point structures is provided with a transverse threaded through hole which is orthogonal to the first through hole in a normal direction, and a tightening screw is detachably inserted into the transverse threaded through hole.

3. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1 is characterized in that: A chamfer structure is provided on a connecting edge between an end surface of one end of the dual-clamping-point rotary zero-adjusting tool away from the two clamping-point structures and the first through hole.

4. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1 is characterized in that: A second through hole is arranged at the center of the nut screwing tool.

5. The high-precision adjustment tool for the proportional servo valve core screw according to claim 4 is characterized in that: One end of the nut screwing tool away from the hexagonal countersunk structure is provided with a transverse optical through hole in a normal direction orthogonal to the second through hole, and a rotating rod is detachably penetrated through the transverse optical through hole.

6. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1, characterized in that: The circumferential side edges of each of the clamping point structures are transitionally matched with the circumferential side edges of the clamping groove of the proportional servo valve sensor.

7. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1, characterized in that: The heights of the two clamping point structures along the axis direction of the dual clamping point rotation zeroing tool are equal, and the height of each clamping point structure along the axis direction of the dual clamping point rotation zeroing tool is greater than or equal to the depth of each clamping slot along the axis direction of the proportional servo valve sensor.

8. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1, characterized in that: The outer diameter surface of one end of the nut screwing tool away from the hexagonal countersunk structure is provided with a knurling structure.

9. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1, characterized in that: The outer diameter surface of the nut screwing tool is provided with an outer circle polishing structure, the outer circle polishing structure and the nut screwing tool are an integrated structure, and the polishing degree of the outer circle polishing structure is Ra0.2-0.3μm.

10. The high-precision adjustment tool for the proportional servo valve core screw according to claim 1, characterized in that: The inner diameter surface of the double-clamping-point rotary zeroing tool is provided with an inner circle polishing structure, the inner circle polishing structure and the double-clamping-point rotary zeroing tool are an integrated structure, and the polishing degree of the inner circle polishing structure is Ra0.2-0.3μm.

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