Valve core positioning and adjusting structure for precision hydraulic valve

Abstract

The utility model discloses a valve core positioning and adjusting structure for precision hydraulic valve relates to valve core technical field, including valve core cover, the top sliding installation of valve core cover has valve core connecting rod, the inside sliding installation of valve core cover has with the fixed installation of valve core connecting rod water -passing valve core, the surface screw thread connection of valve core connecting rod has adjusting nut, still includes quick heightening mechanism, sets up at the surface of valve core cover and is used for the quick adjustment of the height position of adjusting nut. The utility model discloses through setting valve core cover, valve core connecting rod, water -passing valve core, adjusting nut, quick heightening mechanism and rotating support subassembly, can realize valve core quick coarse adjustment and accurate fine adjustment's efficient combination, and the adjusting process axial has no shift and strong stability, solved the traditional adjusting structure adjusting efficiency low, the adjusting process easy shift deviation, the dismounting maintenance operation complicated and long -term operation easy to loosen displacement problem.

Description

Technical Field

[0001] This utility model relates to the field of valve core technology, specifically to a valve core positioning and adjustment structure for a precision hydraulic valve. Background Technology

[0002] As the core control component of a hydraulic system, the positioning accuracy of the valve core directly determines the pressure regulation accuracy, flow control stability, and operational reliability of the hydraulic system. It is widely used in fields with extremely high control accuracy requirements, such as aerospace, precision machine tools, and engineering machinery. In the assembly, debugging, and subsequent maintenance of precision hydraulic valves, valve core positioning adjustment is a critical process. It is necessary to achieve precise displacement control of the valve core within the valve core sleeve through adjustment structure to ensure the opening and closing characteristics and control performance of the hydraulic valve. Currently, most existing precision hydraulic valve spool positioning and adjustment structures employ a single threaded adjustment method. This involves rotating the adjusting nut to drive the valve spool connecting rod, which in turn moves the valve spool to achieve positioning adjustment. However, this type of structure has several technical drawbacks in practical applications: Firstly, it suffers from low adjustment efficiency. When the valve spool needs to be adjusted to the target position, the adjusting nut must be continuously rotated for displacement compensation. Especially in the initial adjustment stage, multiple rotations are required to bring the valve spool close to the target position, severely impacting assembly and debugging efficiency. Secondly, it suffers from insufficient adjustment stability. The adjusting nut lacks a reliable rotational support structure during rotation, making it prone to axial movement or radial offset, resulting in decreased valve spool positioning accuracy and failing to meet the requirements of high-precision hydraulic systems. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a valve core positioning and adjustment structure for precision hydraulic valves. This structure combines rapid coarse adjustment with precise fine adjustment of the valve core, and features axial movement-free and high stability during the adjustment process. It solves the problems of low adjustment efficiency, easy movement and offset during the adjustment process, cumbersome disassembly and maintenance, and easy loosening and displacement during long-term operation of traditional adjustment structures.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a valve core positioning and adjustment structure for a precision hydraulic valve, comprising a valve core sleeve, a valve core connecting rod slidably mounted on the top of the valve core sleeve, a water-passing valve core slidably mounted inside the valve core sleeve and fixedly mounted to the valve core connecting rod, an adjusting nut threadedly connected to the surface of the valve core connecting rod, and a quick height adjustment mechanism disposed on the surface of the valve core sleeve and used to quickly adjust the height position of the adjusting nut; A rotating support assembly is located on top of the valve core sleeve and is used to provide rotational support for the adjusting nut, and is rotatably connected to the quick-adjustment mechanism.

[0005] In a preferred embodiment of this invention, the rapid height adjustment mechanism includes a height adjustment ring, a positioning pin, and a limiting and anti-loosening component. The height adjustment ring is slidably mounted on the top of the valve core sleeve surface. The positioning pin is inserted into the front side of the height adjustment ring. The limiting and loosening component is located on the side of the valve core sleeve near the positioning pin and is used to cooperate with the positioning pin to limit and loosen the height of the height adjustment ring.

[0006] As a preferred embodiment of this utility model, the limiting and anti-loosening component includes a height adjusting protrusion and a positioning hole. The height adjusting protrusion is fixedly installed on the side of the valve core sleeve near the positioning pull pin. The positioning hole is provided in several groups and is longitudinally opened at equal intervals inside the height adjusting protrusion, and is inserted and cooperated with the positioning pull pin.

[0007] As a preferred embodiment of this utility model, the rotating support assembly includes a connecting column, a rotating ring, a limiting ring frame, and fixing bolts. Two sets of connecting columns are provided and symmetrically arranged on both sides of the top of the height adjusting ring. The connecting column and the height adjusting ring are detachably installed. The rotating ring is rotatably installed inside the limiting ring frame and is detachably fixed to the adjusting nut by fixing bolts.

[0008] As a preferred embodiment of this utility model, the top of the valve core sleeve is provided with an installation groove, the surface of the valve core connecting rod is fitted with a spring, and the spring is located between the limiting ring frame and the valve core sleeve. The bottom of the spring is fixedly installed with the installation groove, and the top of the spring is movably engaged with the limiting ring frame.

[0009] As a preferred embodiment of this utility model, a tension spring is sleeved on the surface of the positioning pin, one end of the tension spring is fixedly installed with the positioning pin, and the other end is fixedly installed with the height adjustment ring.

[0010] As a preferred embodiment of this utility model, both sides of the bottom of the height adjustment ring are threaded with connecting bolts, and the top of the connecting bolts passes through the height adjustment ring and is threadedly fixed to the connecting column.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, by setting up a valve core sleeve, a valve core connecting rod, a water valve core, an adjusting nut, a quick height adjustment mechanism, and a rotating support assembly, can achieve an efficient combination of rapid coarse adjustment and precise fine adjustment of the valve core. The adjustment process is axial without movement and has strong stability. It solves the problems of low adjustment efficiency, easy movement and deviation during the adjustment process, cumbersome disassembly and maintenance operations, and easy loosening and displacement during long-term operation of traditional adjustment structures.

[0012] 1. This utility model, by setting a quick height adjustment mechanism, allows the height adjustment ring to slide and change its height on the surface of the valve core sleeve. The height adjustment ring drives the positioning pin for adjustment, and after adjustment, the position is fixed by the limit release component, thereby providing height support and fixing for the rotating support component.

[0013] 2. This utility model uses a limiting and anti-loosening component. The height adjustment protrusion can limit the rotation of the height adjustment ring, preventing the height adjustment ring from twisting during the sliding process. At the same time, the protruding part can increase the depth of the positioning pin insertion hole and improve the stability of the height support. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the axial explosion structure of this utility model; Figure 3 This is a half-sectional three-dimensional structural diagram of the valve core sleeve of this utility model; Figure 4 This is a schematic diagram of the exploded half-section structure of the valve core sleeve of this utility model.

[0015] In the diagram: 1. Valve core sleeve; 11. Height adjustment protrusion; 2. Height adjustment ring; 21. Positioning pin; 22. Connecting bolt; 23. Positioning hole; 24. Tension spring; 3. Connecting column; 4. Rotating ring; 41. Limiting ring bracket; 42. Fixing bolt; 5. Adjusting nut; 6. Valve core connecting rod; 7. Water valve core; 101. Mounting groove; 102. Spring. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0020] Example 1 Reference Figure 1-4 The first embodiment of this utility model adopts the following technical solution: a valve core positioning and adjustment structure for a precision hydraulic valve, including a valve core sleeve 1, a valve core connecting rod 6 slidably installed on the top of the valve core sleeve 1, a water-conducting valve core 7 slidably installed inside the valve core sleeve 1 and fixedly installed with the valve core connecting rod 6, an adjusting nut 5 threadedly connected to the surface of the valve core connecting rod 6, and a quick height adjustment mechanism, which is set on the surface of the valve core sleeve 1 and used to quickly adjust the height position of the adjusting nut 5. The quick height adjustment mechanism includes a height adjustment ring 2, a positioning pull pin 21 and a limit and anti-loosening component. The height adjustment ring 2 is slidably installed on the top of the surface of the valve core sleeve 1, the positioning pull pin 21 is inserted into the front side of the height adjustment ring 2, and the limit and loosening component is set on the side of the valve core sleeve 1 near the positioning pull pin 21 and is used to cooperate with the positioning pull pin 21 to limit and loosen the height of the height adjustment ring 2. A rotating support assembly is located on top of the valve core sleeve 1 and is used to provide rotating support for the adjusting nut 5, and is rotatably connected to the quick-adjustment mechanism.

[0021] Specifically, the height adjustment ring 2 can slide on the surface of the valve core sleeve 1 to change its height, and the positioning pin 21 is adjusted by the height adjustment ring 2. After adjustment, the position is fixed by the limit release component, thereby providing height support and fixing for the rotating support component.

[0022] Example 2 The second embodiment of this utility model adopts the following technical solution: the limiting and anti-loosening component includes a height adjusting protrusion 11 and a positioning hole 23. The height adjusting protrusion 11 is fixedly installed on the side of the valve core sleeve 1 near the positioning pull pin 21. Several sets of positioning holes 23 are provided and are longitudinally opened at equal intervals inside the height adjusting protrusion 11, and are inserted and cooperated with the positioning pull pin 21. The rotating support component includes a connecting column 3, a rotating ring 4, a limiting ring frame 41 and a fixing bolt 42. Two sets of connecting columns 3 are provided and are symmetrically arranged on both sides of the top of the height adjusting ring 2. The connecting column 3 and the height adjusting ring 2 are detachably installed. The rotating ring 4 is rotatably installed inside the limiting ring frame 41. The rotating ring 4 is detachably fixed to the adjusting nut 5 by the fixing bolt 42.

[0023] Specifically, the height adjustment protrusion 11 can limit the rotation of the height adjustment ring 2, preventing the height adjustment ring 2 from twisting during its sliding process. At the same time, the protrusion can increase the depth of the positioning pin 21 into the positioning hole 23, improving the stability of the height support. The connecting column 3 can fix and support the limiting ring frame 41, thereby limiting the rotation of the rotating ring 4 through the limiting ring frame 41. When the connecting column 3 is fixed, the limiting ring frame 41, the rotating ring 4, and the adjusting nut 5 will not move axially. At this time, twisting the adjusting nut 5 can adjust the height of the valve core connecting rod 6. Since the limiting ring frame 41, the connecting column 3, and the height adjustment ring 2 can slide and adjust, the adjustment speed is increased, and it can be quickly moved to the desired position before twisting the adjusting nut 5 for fine adjustment.

[0024] Example 3 The third embodiment of this utility model adopts the following technical solution: the top of the valve core sleeve 1 is provided with an installation groove 101, the surface of the valve core connecting rod 6 is provided with a spring 102, and the spring 102 is located between the limiting ring frame 41 and the valve core sleeve 1. The bottom of the spring 102 is fixedly installed with the installation groove 101, and the top is movably engaged with the limiting ring frame 41. The surface of the positioning pull pin 21 is provided with a tension spring 24. One end of the tension spring 24 is fixedly installed with the positioning pull pin 21, and the other end is fixedly installed with the height adjustment ring 2. Both sides of the bottom of the height adjustment ring 2 are threaded with connecting bolts 22, and the top of the connecting bolts 22 passes through the height adjustment ring 2 and is threadedly fixed with the connecting post 3.

[0025] Specifically, the mounting groove 101 can limit the spring 102, preventing the bottom of the spring 102 from being misaligned and affecting the support of the limiting ring frame 41. When it is necessary to easily remove the adjusting nut 5, the positioning pin 21 can be pulled open, and the adjusting nut 5 and the valve core connecting rod 6 can be quickly ejected by the elastic force of the spring 102, improving the speed of disassembly and maintenance. The tension spring 24 can make it easy for the positioning pin 21 to have tension after being pulled, so that the positioning pin 21 can be stably inserted into the positioning hole 23, and will not slip and fall off due to its own weight, improving the stability after height adjustment. The connecting bolt 22 can easily connect and remove the connecting column 3, the top limiting ring frame 41 and the rotating ring 4, improving the convenience of maintenance.

[0026] Working principle: The height adjustment ring 2 is slidably mounted on the top surface of the valve core sleeve 1. The positioning pin 21 is inserted into the corresponding positioning hole 23 of the height adjustment protrusion 11 to achieve the initial positioning of the height adjustment ring 2. The connecting column 3 is fixedly connected to the height adjustment ring 2 by the connecting bolt 22, and the limiting ring frame 41 is in the initial height position with the connecting column 3. The rotating ring 4 is fixedly connected to the adjusting nut 5 by the fixing bolt 42, and the adjusting nut 5 is threadedly connected to the valve core connecting rod 6. The spring 102 is sleeved on the surface of the valve core connecting rod 6, with its bottom fixedly installed in the mounting groove 101 of the valve core sleeve 1, and its top movably engaged with the limiting ring frame 41, and is in a pre-compressed state. The tension spring 24 on the surface of the positioning pin 21 is in a naturally stretched state to ensure the stability of the positioning pin 21 and the positioning hole 23. Insert; pull the positioning pin 21 outward to disengage it from the positioning hole 23 on the height adjusting protrusion 11. At this time, the tension spring 24 on the surface of the positioning pin 21 is stretched, storing elastic potential energy. Since the height adjusting protrusion 11 acts as a rotation limiter for the height adjusting ring 2, it can prevent the height adjusting ring 2 from twisting during sliding, ensuring adjustment stability. Slide the height adjusting ring 2 up and down along the axial direction of the valve core sleeve 1. The height adjusting ring 2 drives the connecting column 3 to move synchronously through the connecting bolt 22. The connecting column 3 drives the limiting ring frame 41, the rotating ring 4, and the adjusting nut 5 fixed thereto to move synchronously axially. Since the adjusting nut 5 is threadedly connected to the valve core connecting rod 6, the axial movement of the adjusting nut 5 will drive the valve core connecting rod 6 to drive the water valve core 7. The valve core moves synchronously within the valve core sleeve 1 to achieve rapid coarse adjustment of the valve core. When the valve core approaches the target position through coarse adjustment, the positioning pin 21 is released, the tension spring 24 releases its elastic potential energy, and pulls the positioning pin 21 to re-insert into the positioning hole 23 corresponding to the height of the height adjustment protrusion 11, thus completing the height positioning and fixing of the height adjustment ring 2. The protruding structure of the height adjustment protrusion 11 can increase the insertion depth of the positioning pin 21 and the positioning hole 23, further improving the stability of the height support and preventing the height adjustment ring 2 from shifting during subsequent fine adjustment. During fine adjustment, the connecting column 3 provides stable fixed support for the limiting ring frame 41, and the rotating ring 4 is rotatably installed inside the limiting ring frame 41, and the rotating ring 4 is fixed to the adjusting nut 5 by the fixing bolt 42. Connection; Since the height adjustment ring 2 is fixed by the positioning pin 21, the connecting column 3 and the limiting ring frame 41 are both in a fixed state. Then, the rotating ring 4 is limited by the limiting ring frame 41 to ensure that the adjusting nut 5 can only rotate and will not move axially, thus providing a guarantee for precise fine adjustment; Rotating the adjusting nut 5, since the adjusting nut 5 is threadedly connected to the valve core connecting rod 6, and the valve core connecting rod 6 is subject to the sliding limiting effect of the water valve core 7 and the valve core sleeve 1, the rotational movement of the adjusting nut 5 is converted into the axial linear movement of the valve core connecting rod 6, which drives the water valve core 7 to make a slight displacement adjustment within the valve core sleeve 1; By controlling the rotation angle of the adjusting nut 5, the valve core can be accurately positioned, meeting the high-precision control requirements of precision hydraulic valves;The bottom of spring 102 is fixed to valve core sleeve 1 via mounting groove 101. Mounting groove 101 can limit the movement of spring 102 to prevent its bottom from misaligning. The top of spring 102 is movably engaged with limit ring frame 41, providing elastic support to limit ring frame 41 during adjustment and reducing vibration during adjustment. When it is necessary to remove adjusting nut 5 for maintenance, pull open positioning pin 21 to release the height limit. Spring 102 releases elastic potential energy, quickly ejecting limit ring frame 41, rotating ring 4, adjusting nut 5, and valve core connecting rod 6, greatly improving disassembly and maintenance speed. One end of tension spring 24 on the surface of positioning pin 21 is fixed to positioning pin 21, and the other end is fixed to height adjusting ring 2, allowing positioning pin 21 to... After being pulled, it provides continuous tension, ensuring stable insertion into the positioning hole 23 and preventing the positioning pin 21 from slipping and falling due to its own weight or equipment vibration, thus ensuring structural stability after height adjustment. When maintenance is required on the water valve core 7 or the adjustment assembly, first remove the fixing bolt 42 to separate the rotating ring 4 from the adjusting nut 5; then pull the positioning pin 21 outward, and the spring 102 will release the tension, popping out the adjusting nut 5, valve core connecting rod 6, and water valve core 7 for easy maintenance. If the rotating support assembly needs to be removed, the connecting bolt 22 can be unscrewed to separate the connecting column 3 from the height adjustment ring 2, completing the disassembly of each component. After maintenance, reassemble according to the reverse steps above to restore the normal use of the device.

[0027] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0028] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0029] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A valve core positioning and adjustment structure for a precision hydraulic valve, comprising a valve core sleeve (1), a valve core connecting rod (6) slidably mounted on the top of the valve core sleeve (1), a water-conducting valve core (7) fixedly mounted to the valve core connecting rod (6) slidably mounted inside the valve core sleeve (1), and an adjusting nut (5) threadedly connected to the surface of the valve core connecting rod (6), characterized in that: It also includes a quick height adjustment mechanism, which is set on the surface of the valve core sleeve (1) and is used to quickly adjust the height position of the adjusting nut (5); A rotating support assembly is disposed on top of the valve core sleeve (1) and is used to provide rotating support for the adjusting nut (5), and is rotatably connected to the quick-adjustment mechanism.

2. The valve core positioning and adjustment structure for a precision hydraulic valve according to claim 1, characterized in that: The rapid height adjustment mechanism includes a height adjustment ring (2), a positioning pin (21), and a limiting and anti-loosening component. The height adjustment ring (2) is slidably installed on the top of the surface of the valve core sleeve (1). The positioning pin (21) is inserted into the front side of the height adjustment ring (2). The limiting and anti-loosening component is located on the side of the valve core sleeve (1) near the positioning pin (21) and is used to cooperate with the positioning pin (21) to limit and loosen the height of the height adjustment ring (2).

3. The valve core positioning and adjustment structure for a precision hydraulic valve according to claim 2, characterized in that: The limiting and anti-loosening component includes a height adjustment protrusion (11) and a positioning hole (23). The height adjustment protrusion (11) is fixedly installed on the side of the valve core sleeve (1) near the positioning pull pin (21). The positioning hole (23) is provided in several groups and is opened longitudinally at equal distances inside the height adjustment protrusion (11) and is inserted and cooperated with the positioning pull pin (21).

4. The valve core positioning and adjustment structure for a precision hydraulic valve according to claim 2, characterized in that: The rotating support assembly includes a connecting column (3), a rotating ring (4), a limiting ring frame (41), and a fixing bolt (42). There are two sets of connecting columns (3), which are symmetrically arranged on both sides of the top of the height adjusting ring (2). The connecting column (3) and the height adjusting ring (2) are detachably installed. The rotating ring (4) is rotatably installed inside the limiting ring frame (41). The rotating ring (4) is detachably fixed to the adjusting nut (5) by the fixing bolt (42).

5. The valve core positioning and adjustment structure for a precision hydraulic valve according to claim 4, characterized in that: The valve core sleeve (1) has an installation groove (101) on its top. The valve core connecting rod (6) is fitted with a spring (102), and the spring (102) is located between the limiting ring frame (41) and the valve core sleeve (1). The bottom of the spring (102) is fixedly installed with the installation groove (101), and the top is movably engaged with the limiting ring frame (41).

6. The valve core positioning and adjustment structure for a precision hydraulic valve according to claim 2, characterized in that: A tension spring (24) is fitted on the surface of the positioning pin (21). One end of the tension spring (24) is fixedly installed with the positioning pin (21), and the other end is fixedly installed with the height adjustment ring (2).

7. The valve core positioning and adjustment structure for a precision hydraulic valve according to claim 4, characterized in that: Both sides of the bottom of the height adjustment ring (2) are threaded with connecting bolts (22), and the top of the connecting bolts (22) passes through the height adjustment ring (2) and is threadedly fixed to the connecting column (3).

Images