Linear driving device and electric control valve

Abstract

The utility model discloses a linear driving device and an electric control valve, and belongs to the technical field of electromechanical equipment. Comprising a shell assembly, the shell assembly comprises a middle shell, a front shell and a rear shell, and the motor assembly comprises a stator and a rotor; the stator is fixedly installed in the middle shell and used for generating a magnetic field. The rotor comprises a magnet and a motor shaft, the motor shaft is hollow, and threads are arranged in the motor shaft; the linear driving assembly is arranged in the front shell, the stator and the rotor and the rear shell and comprises a stroke hole and a spline sleeve which are arranged on the front shell, a nut arranged in a motor rotor shaft, a lead screw coupled with the nut, a spline shaft fixedly connected with the lead screw and a universal ball head fixedly connected with the spline shaft; the displacement sensor is mounted in the rear shell; the linear driving device provided by the utility model can adapt to a smaller installation space, is good in sealing effect, is more accurate in displacement control, and is suitable for more application scenes.

Description

Technical Field

[0001] The present application relates to the technical field of electromechanical equipment, and more specifically, to a linear drive device and an electric control valve. Background Art

[0002] In electromechanical equipment that relies on media drive such as hydraulics, gas, and electricity, the ability to accurately control the flow direction and / or flow of the media, and thus accurately control the electromechanical equipment to perform various tasks, has attracted widespread attention.

[0003] A prior patent application, patent publication number PCT / CN2023 / 115632, discloses a valve body, at least one valve stem, and at least one motor. The motor acts as a linear drive device, controlling the movement of the valve stem and thereby regulating the flow direction and flow rate of the medium, thereby controlling the electromechanical device. Prior art linear drive devices have the following problems:

[0004] 1. Large space occupation:

[0005] Because the motor (i.e., linear drive) requires an additional bracket to be mounted on the valve body, this increases the overall system size and occupies a significant amount of installation space. In modern industrial applications, space is often a precious resource, so reducing equipment size and improving space utilization are important optimization areas.

[0006] 2. Complex structure:

[0007] To prevent corrosion and leakage caused by the exposed motor, many supporting structures are added in the prior art, such as protective covers, seals, etc. These additional components not only increase the manufacturing cost, but also make the structure of the entire system more complicated, increasing the difficulty of maintenance and repair.

[0008] 3. Limited control accuracy:

[0009] Although motors can achieve linear drive of valve stems to a certain extent, they may not achieve extremely high control accuracy due to their inherent mechanical characteristics and control methods. In applications that require precise adjustment of the flow direction and flow rate of the medium, this limitation may affect the overall performance of the electromechanical equipment.

[0010] 4. Limited application scenarios:

[0011] Due to the aforementioned issues of space occupation, structural complexity, and control precision, existing linear drive devices may not be suitable for all types of electromechanical equipment or application scenarios. In particular, existing technologies may not meet the requirements in some applications with strict space requirements and high control precision.

[0012] In order to solve existing problems and expand the range of choices, we propose a new linear drive device that can adapt to smaller installation spaces, has good sealing effects, more precise displacement control, and is suitable for more application scenarios. Utility Model Content

[0013] In view of the shortcomings of the prior art, the purpose of this application is to provide a linear drive device and an electronic control device that can effectively reduce the size of the device and reduce the demand for installation space.

[0014] In a first embodiment, a linear drive device is provided, comprising:

[0015] A housing assembly, comprising a middle housing, a front housing, and a rear housing, for accommodating and protecting internal components of the housing assembly;

[0016] a transition plate, one side of the transition plate being fixedly connected to the front housing and the other side of the transition plate being fixedly connected to the external valve;

[0017] Motor components, including stator and rotor;

[0018] The stator is fixedly installed inside the middle housing and is used to generate a magnetic field;

[0019] The rotor includes a magnet and a motor shaft. The rotor is rotatably mounted inside the middle housing. The rotor cooperates with the stator to realize electromagnetic drive. The motor shaft is hollow and has a thread inside.

[0020] A linear drive assembly, the linear drive assembly being disposed within the front housing, stator, rotor, and rear housing, the linear drive assembly comprising a travel hole disposed on the front housing, a nut disposed within the motor shaft, a lead screw coupled to the nut, a spline shaft fixedly connected to the lead screw, and a universal ball joint fixedly connected to the spline shaft; the universal ball joint being disposed on the valve stem of the external valve;

[0021] The displacement sensor is installed inside the rear housing and is used to monitor and feedback the displacement information of the rotor or related components in real time.

[0022] Furthermore, the displacement sensor includes a circuit board and a magnetic ring. The circuit board is fixedly installed in the rear shell. A Hall sensor is installed on the circuit board. The magnetic ring is fixedly installed on the rotor to achieve coupling between the Hall sensor and the magnetic ring, thereby monitoring the displacement.

[0023] Furthermore, a spline sleeve is fixedly installed inside the front housing, and the spline sleeve is slidably matched with the spline shaft to support and guide the horizontal sliding of the spline shaft.

[0024] Furthermore, a sealing groove is provided on one side of the transition plate, and a sealing member is installed in the sealing groove.

[0025] Furthermore, the universal ball head includes a sphere and a ball sleeve, the sphere is fixedly connected to the spline shaft, and the ball sleeve has an external thread and a notch design, which facilitates flexible connection of different components.

[0026] Furthermore, the screw and the spline shaft, as well as the spline shaft and the sphere, are fixedly connected to ensure stable and reliable transmission.

[0027] Furthermore, it also includes a control circuit and a communication circuit for executing instructions, receiving and feeding back signals, so as to facilitate controlling the displacement direction and / or stroke of the linear drive device by wireless or wired means.

[0028] In the second scheme, an electrically controlled valve is provided, including a valve body and a valve stem. The linear drive device is used to drive the valve stem to move relative to the valve body, and can accurately control the sliding position of the valve stem in the valve body to achieve medium reversal and / or precise control of medium quantity, thereby realizing control of electromechanical equipment.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. This application installs a magnetic ring on the rotor. When the rotor rotates, the Hall sensor collects the changes in magnetic field strength to detect the displacement of the screw. This can effectively reduce the size of the device, reduce the requirement for installation space, and can be applied to various working conditions.

[0031] 2. This application opens a travel hole inside the front shell so that the spline shaft, ball head, and ball sleeve can all move in the travel hole. When installed with the valve body through the transition plate, the travel hole will be closed, thereby protecting the internal components of the linear drive device and thereby increasing the service life of the device.

[0032] 3. Compact structure and good sealing:

[0033] By optimizing the internal structure and adopting advanced sealing technology, the linear drive device should be able to achieve a good sealing effect to prevent medium leakage and erosion of the equipment by the external environment.

[0034] 4. High control precision:

[0035] Using advanced control and sensor technologies, linear drive devices should be able to achieve high-precision displacement control to meet the needs of various complex application scenarios.

[0036] 5. Wide range of applications:

[0037] This application has multiple applications, including hydraulic valves, gas valves, and potentiometric valves. By driving these devices through a linear drive, it can achieve the purpose of reversing the direction of a medium (such as liquid, gas, or electrical signal) and / or precisely controlling the amount of medium passing through. Furthermore, by driving the electromechanical device through the medium, it can achieve the purpose of controlling the mechanical device. It has good versatility and scalability, can adapt to different types of electromechanical equipment and application scenarios, provide users with more choices and flexibility, and solve the problems encountered in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of a linear drive device;

[0039] Figure 2 It is a schematic diagram of the internal structure of a linear drive device;

[0040] Figure 3 It is a schematic diagram of the overall structure of an electronic control device;

[0041] Figure 4 It is a schematic diagram of the driving structure of an electronically controlled device;

[0042] In the figure: 101, front housing; 1011, travel hole; 102, rear housing; 103, middle housing; 2, stator; 3, rotor; 4, motor shaft; 5, screw; 6, spline shaft; 601, ball; 602, ball sleeve; 7, circuit board; 8, magnetic ring; 9, limit piece; 10, transition plate; 11, valve body; 1101, valve stem. DETAILED DESCRIPTION

[0043] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings.

[0044] Example 1:

[0045] See also Figure 1 and Figure 2 ,This application provides a linear drive device, including a transition plate 10, a housing, a stator 2, and a rotor 3;

[0046] The housing includes a middle housing 103, a front housing 101 and a rear housing 102. The front housing 101 and the rear housing 102 are both connected and fixed to the middle housing 103, and the front housing 101 is installed and fixed to the front housing 101;

[0047] The transition plate 10 is fixedly mounted on one side of the front housing 101. Screw holes are provided on the transition plate 10. A sealing groove is provided on one side of the transition plate 10, and a seal is installed in the groove. The seal is placed in the groove, filling the gap between the transition plate 10 and the external device. The device is then secured to the external device using the screw holes and bolts on the transition plate 10. In this installation method, the front housing 101 protects the spline shaft 6, ball 601, and ball sleeve 602, allowing them to move within the sealed travel cavity 1011, preventing external moisture from entering the device and increasing its service life.

[0048] A travel hole 1011 is provided in the middle of the front housing 101; the stator 2 is fixedly mounted inside the middle housing 103, the rotor 3 is rotatably mounted inside the middle housing 103, a lead screw 5 is threadedly connected to the middle of the rotor 3, and a spline shaft 6 is fixedly connected to the end of the lead screw 5. The lead screw 5 and the spline shaft 6 can be connected by threads or by an integrally formed connection. A spline sleeve is fixedly mounted inside the front housing 101, and the spline sleeve is slidably connected to the spline shaft 6, so that the spline shaft 6 can be horizontally slidably arranged in the front housing 101. A universal ball head is fixedly connected to the end of the key shaft 6; the universal ball head includes a sphere 601 and a ball sleeve 602, the sphere 601 is fixedly connected to the spline shaft 6, the sphere 601 and the spline shaft 6 can be connected by a threaded connection method, or by an integrally formed connection method, the side of the ball sleeve 602 is provided with an external thread, and the end face of the ball sleeve 602 is provided with a notch; when the ball sleeve 602 is connected to an external device, the sphere 601 and the ball sleeve 602 can rotate relative to each other, increasing the degree of freedom of the connection part and avoiding rigid connection to cause structural damage.

[0049] A displacement sensor is installed inside the rear housing 102; the displacement sensor includes a circuit board 7 and a magnetic ring 8; the circuit board 7 is fixedly installed in the front housing 101, a Hall sensor is installed on the circuit board 7, the magnetic ring 8 is fixedly installed on the rotor 3, and the Hall sensor is coupled to the magnetic ring 8.

[0050] The specific application of this embodiment is as follows: during operation, when rotor 3 rotates, driving lead screw 5 to linear displacement, magnetic ring 8 mounted on the end of rotor 3 also rotates in a circular motion, changing the magnetic field strength at the Hall effect sensor. The control mechanism collects the Hall effect sensor signal and calculates the current angle of rotor 3 by counting the number of pulses and tracking the sequence of the pulses. By having multiple magnets on magnetic ring 8, the signal generated by each magnet can provide finer angular resolution, enabling accurate detection of the linear displacement of lead screw 5.

[0051] Example 2:

[0052] See also Figure 3 and Figure 4The present application also provides an electrically controlled valve that utilizes the linear drive device described in Example 1. The linear drive device can drive a valve stem to move relative to a valve body and precisely control the sliding position of the valve stem within the valve body to achieve precise control of medium direction and / or medium volume. The electrically controlled device is a hydraulic valve. When the linear drive device described in Example 1 is used to drive the hydraulic valve, the hydraulic valve includes a valve body 11, within which a valve stem 1101 is slidably connected. A transition plate 10 is fixedly mounted to the valve body 11, and a spline shaft 6 is connected to the valve stem 1101 via a universal ball joint.

[0053] By threading the ball sleeve 602 to the valve stem 1101, the connection between the spline shaft 6 and the valve stem 1101 has a certain degree of freedom of movement. By driving the valve stem 1101 to move through the above-mentioned linear drive device, different flow channels can be formed in the valve body 11, thereby achieving the purpose of reversing the liquid in the hydraulic valve and / or accurately controlling the amount of medium passing through.

[0054] Example 3:

[0055] The present application also provides an electrically controlled valve that utilizes the linear drive device described in Example 1. The electrically controlled device is a gas valve. When the linear drive device described in Example 1 is used to drive the gas valve, the gas valve includes a valve body 11, a valve stem 1101 being slidably connected to the interior of the valve body 11, a transition plate 10 being fixedly mounted to the valve body 11, and a spline shaft 6 being connected to the valve stem 1101 via a universal ball joint. The gas valve employing the linear drive device can achieve precise regulation of gas flow.

[0056] Example 4:

[0057] The present application also provides an electrically controlled valve, which utilizes a linear drive device as described in Example 1. The electrically controlled device is a potentiometric valve. When the linear drive device as described in Example 1 is used to drive the potentiometric valve, the valve includes a valve body 11, a valve stem 1101 being slidably connected to the interior of the valve body 11, a transition plate 10 being fixedly mounted to the valve body 11, and a spline shaft 6 being connected to the valve stem 1101 via a universal ball joint. The potentiometric valve can accurately adjust its potential value under the action of the linear drive device.

[0058] The electronically controlled devices described in the embodiments include but are not limited to hydraulic valves, gas valves, and potentiometric valves. By driving the above-mentioned devices through a linear drive device, the purpose of reversing the medium (such as liquid, gas, electrical signal) and / or precisely controlling the amount of medium passing through can be achieved, thereby driving the electromechanical equipment to work through the medium to achieve the purpose of controlling the mechanical equipment.

[0059] Example 5:

[0060] See also Figure 3 and Figure 4The present application also provides a control circuit and a communication circuit for a linear drive device, which are applied to a linear drive device described in Example 1, and are used to receive feedback signals from a displacement sensor and control the action of the linear drive device to achieve closed-loop control. By collecting signals from the Hall sensor, the displacement of the lead screw 5 is calculated; and the external control signal can be received through wireless or wired communication, and the linear drive device can be controlled according to the external signal to adjust the displacement of the lead screw 5.

[0061] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A linear drive device, characterized in that: include: A housing assembly comprising a middle housing (103), a front housing (101) and a rear housing (102) for accommodating and protecting internal components of the housing assembly; a transition plate (10), wherein one side of the transition plate (10) is fixedly connected to the front housing (101), and the other side of the transition plate (10) is fixedly connected to the external valve; A motor assembly comprising a stator (2) and a rotor (3); The stator (2) is fixedly mounted inside the middle housing (103) and is used to generate a magnetic field; The rotor (3) comprises a magnet and a motor shaft (4); the rotor (3) is rotatably mounted inside the middle housing (103); the rotor (3) cooperates with the stator (2) to realize electromagnetic drive; the motor shaft (4) is hollow and has a thread inside; A linear drive assembly, the linear drive assembly being arranged inside the front housing (101), the stator (2), the rotor (3), and the rear housing (102), the linear drive assembly comprising a travel hole (1011) arranged on the front housing (101), a nut arranged inside the motor shaft (4), a lead screw (5) coupled to the nut, a spline shaft (6) fixedly connected to the lead screw (5), and a universal ball head fixedly connected to the spline shaft (6); the universal ball head being arranged on the valve stem of the external valve; The displacement sensor is installed inside the rear housing (102) and is used for real-time monitoring and feedback of displacement information of the rotor (3) or related components.

2. A linear drive device according to claim 1, characterized in that: The displacement sensor comprises a circuit board (7) and a magnetic ring (8); the circuit board (7) is fixedly mounted in a rear housing (102); a Hall sensor is mounted on the circuit board (7); and the magnetic ring (8) is fixedly mounted on a rotor (3) to achieve coupling between the Hall sensor and the magnetic ring (8), thereby monitoring displacement.

3. The linear drive device according to claim 1, characterized in that: A spline sleeve is fixedly installed inside the front housing (101), and the spline sleeve is in sliding cooperation with the spline shaft (6) to support and guide the horizontal sliding of the spline shaft (6).

4. The linear drive device according to claim 1, characterized in that: A sealing groove is provided on one side of the transition plate (10), and a sealing member is installed in the sealing groove.

5. The linear drive device according to claim 1, characterized in that: The universal ball head comprises a sphere (601) and a ball sleeve (602), wherein the sphere (601) is fixedly connected to the spline shaft (6), and the ball sleeve (602) has an external thread and a notch design, which facilitates flexible connection of different components.

6. The linear drive device according to claim 5, characterized in that: The screw (5) and the spline shaft (6), as well as the spline shaft (6) and the sphere (601), are fixedly connected to ensure stable and reliable transmission.

7. The linear drive device according to claim 1, characterized in that: It also includes a control circuit and a communication circuit for executing instructions, receiving and feeding back signals, so as to facilitate controlling the displacement direction and / or stroke of the linear drive device by wireless or wired means.

8. An electrically controlled valve, comprising a valve body (11) and a valve stem (1101), using a linear drive device according to any one of claims 1 to 7, characterized in that: The linear drive device is used to drive the valve stem (1101) to move relative to the valve body (11), and can accurately control the sliding position of the valve stem (1101) in the valve body (11) to achieve precise control of medium reversal and / or medium quantity, thereby realizing the control of electromechanical equipment.

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