Sensor connecting structure for hydraulic valve and hydraulic valve

Abstract

The utility model discloses a sensor connecting structure for a hydraulic valve and the hydraulic valve, and belongs to the technical field of hydraulic elements, and the sensor connecting structure comprises a valve element, a connecting piece, a connecting piece and a connecting piece, the displacement sensor comprises a shell and an induction iron core provided with external threads, the induction iron core is arranged in a sliding mode relative to the shell, and the induction iron core is fixedly connected with the threaded hole of the valve element through the external threads; the first locking nut is in threaded connection with the induction iron core, and the first locking nut is located between the shell and the valve element; the first locking nut is configured to be capable of moving to abut against the valve element through the screwing action when the induction iron core is screwed to the valve element. According to the hydraulic valve, the first locking nut is screwed to abut against the induction iron core, so that the axial stability of the induction iron core relative to the valve element can be improved, the influence of vibration of the hydraulic valve on the connection stability between the induction iron core and the valve element is reduced, and the induction iron core is prevented from loosening relative to the valve element.

Description

Technical Field

[0001] This application relates to the field of hydraulic component technology, specifically to a sensor connection structure for a hydraulic valve and a hydraulic valve. Background Technology

[0002] Hydraulic valves are core components of hydraulic systems, used to control the flow direction, pressure, and flow rate of fluids. The performance and reliability of hydraulic valves directly affect the working efficiency and safety of the entire hydraulic system. A typical hydraulic valve includes a valve body, a valve core housed within the valve body, and a displacement sensor fixedly mounted to the valve core. The inductive core of the displacement sensor is fixedly mounted to one end of the valve core. When fluid flows into the valve body, the fluid pushes the valve core to slide relative to the valve body. This causes the valve body to move the inductive core, and the displacement of the inductive core and valve body can be detected by the induction coil in the displacement sensor.

[0003] In related technologies, the sensing core is typically threaded onto one end of the valve core. This connection method suffers from problems such as unstable connection and susceptibility to vibration, which can cause the sensing core to loosen relative to the valve core, leading to a decrease in the measurement accuracy of the displacement sensor. Furthermore, in related technologies, the displacement sensor is generally fixed to the valve body via a sensor mounting base, also threaded onto the base. Similarly, the threaded connection between the displacement sensor and the mounting base also suffers from problems such as unstable connection and susceptibility to vibration, which can cause the displacement sensor to loosen relative to the mounting base. This not only reduces the measurement accuracy of the displacement sensor but also affects the sealing performance of the hydraulic valve. Utility Model Content

[0004] This application aims to address one of the technical problems in the related art to a certain extent. To this end, this application provides a sensor connection structure for a hydraulic valve and a hydraulic valve.

[0005] To achieve the above objectives, this application adopts the following technical solution: a sensor connection structure for a hydraulic valve, the sensor connection structure comprising:

[0006] The valve core has a threaded hole.

[0007] A displacement sensor includes a housing and a sensing core with external threads, the sensing core being slidably disposed relative to the housing, and the sensing core being fixedly connected to a threaded hole of a valve core via the external threads; and,

[0008] A first locking nut is threadedly connected to the induction core, and the first locking nut is located between the housing and the valve core;

[0009] The first locking nut is configured to move to abut against the valve core by a screwing action when the induction core is tightened to the valve core.

[0010] The application of this application has the following beneficial effects: A first locking nut is threaded onto the induction iron core. After the induction iron core and the valve core are tightened, the first locking nut can be tightened against the induction iron core by screwing it on. This can improve the axial stability of the induction iron core relative to the valve core, reduce the impact of hydraulic valve vibration on the connection stability between the induction iron core and the valve core, and prevent the induction iron core from loosening relative to the valve core.

[0011] Optionally, the sensor connection structure further includes a first elastic washer, which is sleeved on the outside of the inductive core and located between the first locking nut and the valve core. The first elastic washer replenishes stress promptly when the first locking nut experiences stress relaxation relative to the inductive core, preventing the first locking nut from loosening and further improving the connection stability between the inductive core and the valve core.

[0012] Optionally, the sensor connection structure further includes a mounting base for fixed installation with the valve body of the hydraulic valve; the mounting base is provided with a through mounting hole, the housing extends into the mounting hole from one end and is threadedly connected to the mounting hole, and the sensing iron core extends out from the other end of the mounting hole.

[0013] Optionally, the inner wall of the mounting hole is provided with an internal thread for threaded connection with the housing, and the axial dimension of the mounting hole is greater than the axial dimension of the internal thread on the inner wall of the mounting hole. This way, when the housing is screwed into the mounting hole, the screwing is limited to the edge of the internal thread within the mounting hole, thereby improving the stability of the housing relative to the mounting base.

[0014] Optionally, the housing includes a main body and a connecting part. The connecting part includes a first connecting segment disposed on the main body and a second connecting segment disposed on the first connecting segment. The first connecting segment is provided with external threads. The housing is threadedly connected to a mounting hole through the first connecting segment, and the second connecting segment extends into the mounting hole.

[0015] Optionally, a sealing structure is provided between the second connecting section and the inner wall of the mounting hole, the sealing structure being used to prevent fluid inside the valve body of the hydraulic valve from overflowing through the mounting hole.

[0016] Optionally, the sealing structure includes a first annular groove disposed on the inner wall of the mounting hole and a first sealing ring disposed in the first annular groove, the first sealing ring being clamped between the bottom wall of the first annular groove and the second connecting section; and / or, the first sealing structure includes a second annular groove disposed on the second connecting section and a second sealing ring disposed in the second annular groove, the second sealing ring being clamped between the bottom wall of the second annular groove and the inner wall of the mounting hole.

[0017] Optionally, the sensor connection structure further includes a second locking nut threaded to the first connecting section. The second locking nut is located between the main body and the mounting base, and is configured to move to abut against the mounting base by a screwing action when the first connecting section is tightened to the mounting base. After the first connecting section is tightened to the mounting base, the second locking nut can be screwed to abut against the mounting base. This improves the axial stability of the first connecting section relative to the mounting base, reduces the impact of hydraulic valve vibration on the connection stability between the first connecting section and the mounting base, and prevents the displacement sensor from becoming loose relative to the mounting base.

[0018] Optionally, the sensor connection structure further includes a second elastic washer, which is sleeved outside the first connecting section and located between the second locking nut and the mounting base. The second elastic washer replenishes stress promptly when the second locking nut experiences stress relaxation relative to the first connecting section, preventing the second locking nut from loosening and further improving the connection stability between the first connecting section and the mounting base.

[0019] Furthermore, this application also provides a hydraulic valve, including a valve body having a valve cavity and a through hole communicating the valve cavity with the outside. The hydraulic valve further includes a sensor connection structure as described in any of the above technical solutions, wherein the valve core is slidably disposed within the valve cavity, and the displacement sensor extends out of the valve body through the through hole. The reasoning process for the beneficial effects of the hydraulic valve provided in this application and the aforementioned sensor connection structure is similar, and will not be repeated here.

[0020] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. The best embodiments or means of this application will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this application. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0021] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0022] Figure 1 A schematic diagram of a sensor connection structure for a hydraulic valve provided in an embodiment of this application;

[0023] Figure 2 An exploded view of the sensor connection structure;

[0024] Figure 3 for Figure 2 A further exploded view of the sensor connection structure in the image;

[0025] Figure 4 This is a cross-sectional view of the sensor connection structure;

[0026] Figure 5 A schematic diagram of the hydraulic valve for applying the sensor connection structure provided in this embodiment.

[0027] The components are as follows: 1. Valve core; 10. Threaded hole; 2. Induction core; 3. Housing; 30. Main body; 31. Connecting part; 310. First connecting section; 311. Second connecting section; 3110. Second annular groove; 3111. Second sealing ring; 4. First locking nut; 5. First elastic washer; 6. Mounting seat; 60. Mounting hole; 61. First annular groove; 62. First sealing ring; 63. Third sealing ring; 7. Second locking nut; 8. Valve body. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0029] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0030] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] This embodiment provides a sensor connection structure for hydraulic valves, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the sensor connection structure includes a valve core 1, a displacement sensor, and a first locking nut 4. The valve core 1 has a threaded hole 10 (not shown in the figure). The displacement sensor includes a housing 3 and an induction core 2 with external threads (not shown in the figure). The induction core 2 is slidably disposed relative to the housing 3 and is fixedly connected to the threaded hole 10 of the valve core 1 via the external threads. With this structure, when the valve core 1 slides under the drive of fluid, it can move the induction core 2. The induction coil in the displacement sensor can detect the movement of the induction core 2, that is, it can detect the amount of movement of the valve core 1, thereby enabling monitoring of the hydraulic valve's operating status. In this embodiment, the first locking nut 4 is threadedly connected to the induction core 2 and is located between the housing 3 and the valve core 1. The first locking nut 4 is configured to move to abut against the valve core 1 by a screwing action when the induction core 2 is tightened to the valve core 1. That is, after the induction core 2 is tightened to the valve core 1, the first locking nut 4 can be screwed to abut against the induction core 2. This can improve the axial stability of the induction core 2 relative to the valve core 1, reduce the impact of hydraulic valve vibration on the connection stability between the induction core 2 and the valve core 1, and prevent the induction core 2 from becoming loose relative to the valve core 1.

[0033] Furthermore, such as Figure 4 As shown, the sensor connection structure in this embodiment also includes a first elastic washer 5. The first elastic washer 5 is sleeved on the outside of the inductive core 2 and is located between the first locking nut 4 and the valve core 1. The first elastic washer 5 can replenish the stress in time when the first locking nut 4 experiences stress relaxation relative to the inductive core 2, preventing the first locking nut 4 from loosening, thereby further improving the connection stability between the inductive core 2 and the valve core 1.

[0034] The sensor connection structure provided in this embodiment also includes a mounting base 6, which is used for fixed installation with the valve body 8 of the hydraulic valve. The mounting base 6 has a through mounting hole 60. The housing 3 extends into the mounting hole 60 from one end and is threadedly connected to it, while the sensing core 2 extends out from the other end of the mounting hole 60. The mounting base 6 facilitates the fixed installation of the displacement sensor onto the valve body 8 and also seals the opening of the valve body 8. Furthermore, the inner wall of the mounting hole 60 in this embodiment has an internal thread (not shown in the figure) for threaded connection with the housing 3, and the axial dimension of the mounting hole 60 is larger than the axial dimension of the internal thread on the inner wall of the mounting hole 60. This restricts the housing 3 from further screwing into the mounting hole 60 when it reaches the edge of the internal thread, thereby improving the stability of the housing 3 relative to the mounting base 6.

[0035] like Figure 3 As shown, the housing 3 of the displacement sensor in this embodiment includes a main body 30 and a connecting part 31. The connecting part 31 includes a first connecting section 310 disposed on the main body 30 and a second connecting section 311 disposed on the first connecting section 310. The first connecting section 310 is provided with external threads (not shown in the figure). The housing 3 is threadedly connected to the mounting hole 60 through the first connecting section 310, and the second connecting section 311 extends into the mounting hole 60. With the above structural arrangement, it is convenient for the second connecting section 311 to directly extend into the part of the mounting hole 60 that is not provided with internal threads, avoiding collision between the second connecting section 311 and the internal threads in the mounting hole 60.

[0036] The sensor connection structure provided in this embodiment can be applied to hydraulic valves, such as... Figure 5 As shown, the hydraulic valve includes a valve body 8, which has a valve cavity and a through hole connecting the valve cavity to the outside. In the sensor connection structure provided in this embodiment, the valve core 1 is slidably disposed in the valve cavity, and the displacement sensor extends out of the valve body 8 through the through hole. As mentioned earlier, when fluid flows into the valve cavity, the valve core 1 can slide relative to the valve body 8 under the pressure of the fluid, and at the same time, the valve core 1 can drive the induction core 2 to move. Therefore, there is a risk of fluid leakage from the mounting hole 60 on the mounting base 6 and the through hole on the valve body 8 in this sensor connection structure. Therefore, in combination with Figure 3 and Figure 4 As shown, in this embodiment, a sealing structure is provided between the second connecting section 311 and the inner wall of the mounting hole 60. The sealing structure is used to prevent fluid inside the valve body 8 of the hydraulic valve from overflowing through the mounting hole 60.

[0037] Specifically, the sealing structure in this embodiment includes a first annular groove 61 disposed on the inner wall of the mounting hole 60, a first sealing ring 62 disposed within the first annular groove 61, a second annular groove 3110 disposed on the second connecting section 311, and a second sealing ring 3111 disposed within the second annular groove 3110. The first sealing ring 62 is clamped between the bottom wall of the first annular groove 61 and the second connecting section 311, and the second sealing ring 3111 is clamped between the bottom wall of the second annular groove 3110 and the inner wall of the mounting hole 60. That is, in this embodiment, two sealing rings are provided between the inner wall of the mounting hole 60 and the second connecting section 311. It is readily understood that in other optional embodiments, the sealing structure may only include the first annular groove 61 and the first sealing ring 62, or the sealing structure may only include the second annular groove 3110 and the second sealing ring 3111.

[0038] Similarly, to prevent fluid leakage from the valve body 8 through the through hole in the valve cavity, a third annular groove can be provided on the mounting base 6, and a third sealing ring 63 can be provided in the third annular groove. The mounting base 6 is threaded to the through hole of the valve body 8 (with internal threads on the inner wall of the through hole), and the sealing performance is improved by clamping the third sealing ring 63 between the inner wall of the through hole and the mounting base 6.

[0039] Furthermore, the sensor connection structure provided in this embodiment also includes a second locking nut 7 threadedly connected to the first connecting segment 310. The second locking nut 7 is located between the main body 30 and the mounting base 6, and is configured to move to abut against the mounting base 6 by a screwing action when the first connecting segment 310 is tightened to the mounting base 6. That is, after the first connecting segment 310 is tightened to the mounting base 6, the second locking nut 7 can be screwed to abut against the mounting base 6. This improves the axial stability of the first connecting segment 310 relative to the mounting base 6, reduces the impact of hydraulic valve vibration on the connection stability between the first connecting segment 310 and the mounting base 6, and prevents the displacement sensor from becoming loose relative to the mounting base 6.

[0040] Furthermore, similar to the provision of the first elastic washer 5, a second elastic washer (not shown in the figure) can also be fitted over the first connecting section 310. The second elastic washer is located between the second locking nut 7 and the mounting base 6. By providing the second elastic washer, stress can be replenished promptly when the second locking nut 7 experiences stress relaxation relative to the first connecting section 310, preventing the second locking nut 7 from loosening, thereby further improving the connection stability between the first connecting section 310 and the mounting base 6.

[0041] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art should understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. A sensor connection structure for a hydraulic valve, characterized by, The sensor connecting structure comprises: a valve core (1) provided with a threaded hole (10); a displacement sensor comprising a shell (3) and a sensing iron core (2) provided with external threads, the sensing iron core (2) being slidingly arranged relative to the shell (3), and the sensing iron core (2) being fixedly connected with the threaded hole (10) of the valve core (1) through the external threads; and a first locking nut (4) threadedly connected with the sensing iron core (2), and the first locking nut (4) being located between the shell (3) and the valve core (1). The first locking nut (4) is configured to be moved to abut against the valve core (1) through a screwing action when the sensing iron core (2) is tightened on the valve core (1).

2. The sensor connection structure according to claim 1, wherein The sensor connecting structure further comprises a first elastic washer (5) sleeved on the sensing iron core (2), and the first elastic washer (5) is located between the first locking nut (4) and the valve core (1).

3. The sensor connection structure according to claim 1 or 2, wherein The sensor connecting structure further comprises a mounting seat (6) for fixedly mounting with a valve body (8) of a hydraulic valve. The mounting seat (6) is provided with a mounting hole (60) penetrating therethrough, the shell (3) extends into the mounting hole (60) from one end of the mounting hole (60) and is threadedly connected with the mounting hole (60), and the sensing iron core (2) extends out of the mounting hole (60) from the other end of the mounting hole (60).

4. The sensor connection structure according to claim 3, wherein An inner wall of the mounting hole (60) is provided with internal threads for threadedly connecting with the shell (3), and an axial dimension of the mounting hole (60) is greater than an axial dimension of the internal threads on the inner wall of the mounting hole (60).

5. The sensor connection structure according to claim 3, wherein The shell (3) comprises a main body portion (30) and a connecting portion (31), the connecting portion (31) comprises a first connecting segment (310) provided on the main body portion (30) and a second connecting segment (311) provided on the first connecting segment (310), the first connecting segment (310) is provided with external threads, the shell (3) is threadedly connected with the mounting hole (60) through the first connecting segment (310), and the second connecting segment (311) extends into the mounting hole (60).

6. The sensor connection structure according to claim 4, wherein A sealing structure is arranged between the second connecting segment (311) and the inner wall of the mounting hole (60), and the sealing structure is used to prevent fluid inside the valve body (8) of the hydraulic valve from overflowing through the mounting hole (60).

7. The sensor connection structure according to claim 6, wherein The sealing structure comprises a first annular groove (61) provided on the inner wall of the mounting hole (60) and a first sealing ring (62) provided in the first annular groove (61), and the first sealing ring (62) is clamped between the bottom wall of the first annular groove (61) and the second connecting segment (311). And / or, the first sealing structure comprises a second annular groove (3110) provided on the second connecting segment (311) and a second sealing ring (3111) provided in the second annular groove (3110), and the second sealing ring (3111) is clamped between the bottom wall of the second annular groove (3110) and the inner wall of the mounting hole (60).

8. The sensor connection structure according to claim 4, wherein The sensor connecting structure further comprises a second locking nut (7) screwed to the first connecting section (310), the second locking nut (7) being located between the main body (30) and the mounting seat (6), and the second locking nut (7) being configured to be moved to abut against the mounting seat (6) by a screwing action when the first connecting section (310) is screwed to the mounting seat (6).

9. The sensor connection structure according to claim 8, wherein The sensor connecting structure further comprises a second elastic washer, the second elastic washer being sleeved outside the first connecting section (310), and the second elastic washer being located between the second locking nut (7) and the mounting seat (6).

10. A hydraulic valve comprising a valve body (8) having a valve chamber and a through hole communicating the valve chamber with the outside, characterized in that The hydraulic valve further comprises the sensor connecting structure according to any one of claims 1 to 9, wherein the spool (1) is slidingly arranged in the valve cavity, and the displacement sensor is extended out of the valve body (8) by the through hole.

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