Signal feedback switch and motor valve comprising the same

Abstract

The utility model relates to signal feedback switch and contain the motor valve of this signal feedback switch, including switch support, first switch spring piece, second switch spring piece, third switch spring piece and trigger shaft, first switch spring piece, second switch spring piece, third switch spring piece all are detachable connection in switch support, trigger shaft is matched with first switch spring piece, second switch spring piece, third switch spring piece assembly, when the valve is in the closed state, trigger shaft makes first switch spring piece with third switch spring piece connection, to output close valve to place feedback signal, when the valve is in the open state, trigger shaft makes second switch spring piece with third switch spring piece connection, to output open valve to place feedback signal, the utility model discloses ingenious, have open valve to place and close valve to place signal feedback function simultaneously, need not pass through the locked -rotor current and judge to place situation, greatly reduced the valve power consumption.

Description

Technical Field

[0001] This utility model belongs to the field of switching device technology, specifically relating to a signal feedback switch and a motor valve including the signal feedback switch. Background Technology

[0002] Signal feedback switches are frequently used in various fields such as electronic equipment, instruments, and power systems. The electronic signals fed back by the signal feedback switch are used to control corresponding operations. For example, in the charging gun of new energy vehicles, the on / off signal fed back by the signal feedback switch located inside the charging gun is judged to control the charging gun to charge normally or cut off the power, which greatly improves the safety of the charging gun in practical applications.

[0003] However, in the field of gas control, screw valves are a common type of motor-driven valve. Their working principle involves a motor driving a reduction gear assembly to rotate a screw, which in turn moves a valve plug assembly to open and close the valve. However, traditional screw valve technology has significant drawbacks that severely impact performance and lifespan. Specific problems are as follows: 1. Lack of signal feedback: Some motorized valves lack a feedback mechanism for valve opening / closing status, relying solely on the stall torque generated after the valve is fully open / closed, and determining the status by detecting a sudden increase in current. This method not only significantly increases valve power consumption, but the continuous stall stress also accelerates component wear and significantly shortens the valve's lifespan.

[0004] 2. Limitations of single signal feedback: Another type of motor valve only has one signal feedback function, either valve open or valve closed, which cannot fully cover the key states of valve operation. It still cannot avoid the problems of increased power consumption and shortened lifespan mentioned above, and it is difficult to meet the control system's requirement for accurate monitoring of valve status.

[0005] Therefore, improvements are needed to address the aforementioned technical issues. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies in terms of signal feedback, power consumption control, and lifespan, and to provide a signal feedback switch and a motor valve containing the switch, so as to realize dual signal feedback of valve opening and valve closing, avoid stall losses, improve control accuracy and lifespan, and reduce maintenance costs.

[0007] To achieve the above objectives, this utility model provides a signal feedback switch, including a switch bracket, a first switch spring, a second switch spring, a third switch spring, and a trigger shaft; the first switch spring, the second switch spring, and the third switch spring are all detachably connected to the switch bracket; the trigger shaft is adapted and assembled with the first switch spring, the second switch spring, and the third switch spring; signal feedback is achieved through the cooperation of the trigger shaft with the first switch spring, the second switch spring, and the third switch spring; this signal feedback switch has dual signal feedback functions of valve open and valve close, outputting a valve close signal when closed, no signal output for a short period during opening, and outputting a valve open signal when fully opened.

[0008] Furthermore, the first switch spring, the second switch spring, and the third switch spring are distributed at a predetermined interval on the switch bracket, and the elastic coefficients of the first switch spring, the second switch spring, and the third switch spring are adapted to the triggering force of the trigger shaft, ensuring that signal switching can be stably achieved when the trigger shaft contacts.

[0009] Furthermore, the detachable connection is a snap-fit ​​connection or a bolt connection, so as to facilitate the individual disassembly and replacement of the first switch spring, the second switch spring, and the third switch spring.

[0010] Furthermore, the trigger shaft connects the squeezed spring to the third switch spring by squeezing the first or second switch spring.

[0011] Furthermore, the first switch spring, the second switch spring, and the third switch spring are all conductive springs, and signal feedback is achieved through the electrical connection between the springs.

[0012] Furthermore, the third switch spring is located between the first switch spring and the second switch spring, and the trigger shaft can switch its operating position between the first switch spring and the third switch spring, and between the second switch spring and the third switch spring.

[0013] Furthermore, the trigger shaft is a conductive shaft. When the trigger shaft is connected to the corresponding switch spring, a conductive circuit is formed to output a feedback signal.

[0014] Furthermore, the trigger shaft has a cylindrical structure, and the diameter of the trigger shaft matches the contact spacing of the first switch spring, the second switch spring, and the third switch spring. One end of the trigger shaft is used to link with the internal transmission component of the motor valve, and the contact state with the three switch springs changes synchronously with the movement of the transmission component.

[0015] A motor valve including a signal feedback switch includes a valve body and a drive assembly installed in the valve body; the valve body forms a gas inlet and a gas outlet that are interconnected; the drive assembly is provided with a valve plug assembly for controlling the opening or closing of the gas outlet; the signal feedback switch is fixedly installed inside the drive assembly, and the switch bracket of the signal feedback switch is fixedly connected to the inner wall of the drive assembly by screws.

[0016] Furthermore, the motor valve also includes a reduction gear assembly, a screw, and a nut bracket; the drive assembly includes a motor, which drives the reduction gear assembly to rotate the screw. When the screw rotates, it drives the nut bracket to move linearly along the screw axis. The nut bracket drives the valve plug assembly to move synchronously to realize the opening and closing of the valve. The nut bracket is fixedly connected to the end of the trigger shaft of the signal feedback switch away from the switch spring, driving the trigger shaft to move synchronously to trigger signal feedback.

[0017] Furthermore, the engagement stroke of the drive assembly and the valve plug assembly is adapted to the diameter of the gas outlet of the motor valve. When the valve plug assembly moves to the extreme position close to the gas outlet, it completely blocks the gas outlet; when the valve plug assembly moves to the extreme position far away from the gas outlet, it completely opens the gas outlet.

[0018] Furthermore, the nut bracket is fixedly connected to the valve plug assembly, and the linear movement of the nut bracket drives the valve plug assembly and the trigger shaft to move synchronously in a linear motion.

[0019] The beneficial effects of this utility model are: 1. This utility model has a clever design with dual signal feedback for precise control: the signal feedback switch has dual signal feedback functions for valve opening and valve closing, with clear signal logic, which allows the control system to accurately identify the three states of valve closing, opening process and fully open, avoiding control errors caused by misjudgment of state.

[0020] 2. This utility model avoids stall losses and extends service life: By outputting a position signal in real time through a signal feedback switch, there is no need to rely on stall torque to determine the valve status, which completely avoids the wear and tear on components such as the motor and screw caused by continuous stall stress, effectively reducing valve power consumption and extending service life.

[0021] 3. This utility model is easy to maintain and reduces costs: the switch spring adopts a detachable connection method. When a single spring is damaged, there is no need to replace the entire switch assembly. Only the faulty spring needs to be disassembled and replaced, which greatly reduces maintenance costs and operational difficulty.

[0022] 4. This utility model has reliable transmission and strong adaptability: the motor valve realizes the synchronous movement of the valve plug assembly and the trigger shaft through the transmission structure of the screw and nut bracket, and the transmission accuracy is high; moreover, the cooperation stroke of the drive assembly and the valve plug assembly can be adapted to gas outlets of different diameters, and the application range is wide. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the signal feedback switch of this utility model; Figure 2 This is a schematic diagram of the assembly of the switch bracket and three switch springs of this utility model; Figure 3 This is an exploded view of the switch bracket and three switch springs of this utility model; Figure 4 This is a schematic diagram of the structure of the motor valve of this utility model; Figure 5 This is an exploded view of the structure of the motor valve of this utility model; Figure 6 This is a schematic diagram showing the connection between the drive assembly and the valve plug assembly of this utility model; Figure 7 This is a partial structural diagram of the closed-in signal state of this utility model; Figure 8 This is a partial structural diagram of the activated position signal state of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Switch bracket; 2. Trigger shaft; 3. First switch spring; 4. Second switch spring; 5. Third switch spring; 6. Nut bracket; 7. Valve plug assembly; 8. Signal feedback switch; 10. Valve body; 11. Gas inlet; 12. Gas outlet; 20. Drive assembly; 21. Motor; 22. Reduction assembly; 23. Screw. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example 1

[0028] like Figures 1-3As shown, the signal feedback switch includes a switch bracket 1, a first switch spring 3, a second switch spring 4, a third switch spring 5, and a trigger shaft 2. The first switch spring 3, second switch spring 4, and third switch spring 5 are detachably connected to the switch bracket 1. The trigger shaft 2 is fitted and assembled with the first switch spring 3, second switch spring 4, and third switch spring 5. Signal feedback is achieved through the cooperation of the trigger shaft 2 with the first switch spring 3, second switch spring 4, and third switch spring 5. This signal feedback switch has dual signal feedback functions for valve opening and valve closing. In the closed state, it outputs a valve closing signal; during the opening process, there is no signal output for a short period; and after fully opening, it outputs a valve opening signal. This utility model is ingeniously designed with dual signal feedback for precise control: the signal feedback switch has dual signal feedback functions for valve opening and valve closing, with clear signal logic, allowing the control system to accurately identify the three states of valve closing, opening, and fully opening, avoiding control errors caused by misjudgment of the state.

[0029] The first switch spring 3, the second switch spring 4, and the third switch spring 5 are distributed at a predetermined distance on the switch bracket 1, and the elastic coefficients of the first switch spring 3, the second switch spring 4, and the third switch spring 5 are adapted to the triggering force of the trigger shaft 2 to ensure that the signal switching can be stably realized when the trigger shaft 2 contacts, avoiding signal delay or false triggering; the third switch spring 5 is located between the first switch spring 3 and the second switch spring 4, and is the common end for signal transmission.

[0030] Specifically, the detachable connection is a snap-fit ​​connection or a bolt connection, so as to facilitate the individual disassembly and replacement of the first switch spring 3, the second switch spring 4, and the third switch spring 5, thereby reducing maintenance costs; in addition, the trigger shaft 2 is adapted to be assembled with the first switch spring 3, the second switch spring 4, and the third switch spring 5, and can change the contact state with the switch spring as the external transmission components move.

[0031] The first switch spring 3, the second switch spring 4, and the third switch spring 5 are all conductive springs. Signal feedback is achieved through the electrical connection between the springs. The third switch spring 5 is located between the first switch spring 3 and the second switch spring 4. The trigger shaft 2 can switch its operating position between the first switch spring 3 and the third switch spring 5, and between the second switch spring 4 and the third switch spring 5.

[0032] Trigger shaft 2 is a conductive shaft. When trigger shaft 2 is connected to the corresponding switch spring, a conductive circuit is formed to output a feedback signal, and the signal transmission is stable and reliable.

[0033] The trigger shaft 2 has a cylindrical structure. The diameter of the trigger shaft 2 matches the contact spacing of the first switch spring 3, the second switch spring 4, and the third switch spring 5. One end of the trigger shaft 2 is used to link with the internal transmission components of the motor valve, and the contact state with the three switch springs changes synchronously with the movement of the transmission components. Signal feedback is achieved through the electrical connection between the springs: when the trigger shaft 2 presses the first switch spring 3, the first switch spring 3 and the third switch spring 5 are connected to form a conductive circuit, and a valve-closed signal is output; when the trigger shaft 2 presses the second switch spring 4, the second switch spring 4 and the third switch spring 5 are connected to form a conductive circuit, and a valve-open signal is output; during the opening process, the trigger shaft 2 is in the transition position between the first switch spring 3 and the second switch spring 4, and does not form an effective connection with any spring, and there is no signal output for a short period of time.

[0034] Furthermore, the trigger shaft 2's action on the switch springs is not limited to the aforementioned intermediate connection. It can also achieve signal feedback by pressing the first switch spring 3 or the second switch spring 4 from the side, causing the pressed spring to contact and conduct with the third switch spring 5. Simultaneously, the trigger shaft 2 can switch its operating position between the first switch spring 3 and the third switch spring 5, and between the second switch spring 4 and the third switch spring 5, to adapt to different signal feedback requirements.

[0035] The assembly and debugging of the signal feedback switch includes the following steps: Step 1: Component assembly: Install the first switch spring 3, the second switch spring 4, and the third switch spring 5 into the preset mounting position of the switch bracket 1 by means of snap-fit ​​connection, ensuring that the third switch spring 5 is located between the first switch spring 3 and the second switch spring 4, and that the spacing between the three meets the design requirements; fix one end of the trigger shaft 2 to the nut bracket 6 of the motor valve, and align the other end with the contact area of ​​the three switch springs.

[0036] Step 2: Debugging process: Manually push the nut bracket 6 and observe the contact state between the trigger shaft 2 and the switch spring: When pushed to the closed position, the trigger shaft 2 should stably press the first switch spring 3, making it conductive with the third switch spring 5, and detect the valve closing signal; when pushed to the open position, the trigger shaft 2 should stably press the second switch spring 4, making it conductive with the third switch spring 5, and detect the valve opening signal; there is no signal output during the transition process. After the debugging is qualified, fix the connection between the switch bracket 1 and the drive assembly 20.

[0037] Example 2

[0038] like Figures 4-6As shown, an electric motor valve includes a valve body 10 and a drive assembly 20 installed inside the valve body 10; the valve body 10 has a gas inlet 11 and a gas outlet 12 that are interconnected; the drive assembly 20 is provided with a valve plug assembly 7 for controlling the opening or closing of the gas outlet 12; a signal feedback switch 8 is fixedly installed inside the drive assembly 20, and the switch bracket 1 of the signal feedback switch 8 is fixedly connected to the inner wall of the drive assembly 20 by screws to ensure installation stability.

[0039] Specifically, the motor valve also includes a reduction gear assembly 22, a screw 23, and a nut bracket 6; the drive assembly 20 includes a motor 21, which drives the screw 23 to rotate through the reduction gear assembly 22. When the screw 23 rotates, it drives the nut bracket 6 to move linearly along the axis of the screw 23. The nut bracket 6 drives the valve plug assembly 7 to move synchronously to realize the opening and closing of the valve. The nut bracket 6 is fixedly connected to the end of the trigger shaft 2 of the signal feedback switch 8 away from the switch spring, and drives the trigger shaft 2 to move synchronously to trigger signal feedback.

[0040] The drive assembly 20 and the valve plug assembly 7 are matched with the diameter of the gas outlet 12 of the motor valve. When the valve plug assembly 7 moves to the extreme position close to the gas outlet 12, it completely blocks the gas outlet 12, thus closing the valve. At this time, the nut bracket 6 drives the trigger shaft 2 to press the first switch spring 3, so that the first switch spring 3 is connected to the third switch spring 5, and outputs a valve-closed signal. When the valve plug assembly 7 moves to the extreme position far away from the gas outlet 12, it fully opens the gas outlet 12, thus opening the valve. At this time, the nut bracket 6 drives the trigger shaft 2 to press the second switch spring 4, so that the second switch spring 4 is connected to the third switch spring 5, and outputs a valve-open signal.

[0041] The nut bracket 6 is fixedly connected to the valve plug assembly 7. The linear motion of the nut bracket 6 drives the valve plug assembly 7 and the trigger shaft 2 to move linearly in sync.

[0042] As shown in Figure 7, when the valve is in the closed state: the valve plug assembly 7 blocks the gas outlet, the nut bracket 6 drives the trigger shaft 2 to move to the corresponding position, the trigger shaft 2 makes the first switch spring 3 and the third switch spring 5 contact and conduct, at this time a conductive circuit is formed, and the valve is closed feedback signal is output.

[0043] like Figure 8As shown, when the valve performs the opening action: the motor drives the nut bracket 6 to move the trigger shaft 2 away from the closed position, the first switch spring 3 and the third switch spring 5 separate, and the valve closing position signal is disconnected; before the valve is fully opened, that is, in the middle state of the opening process, the trigger shaft 2 does not connect the second switch spring 4 and the third switch spring 5, and there is no position signal feedback at this time; when the valve is fully opened, the trigger shaft 2 makes the second switch spring 4 and the third switch spring 5 contact and conduct, forming a conductive circuit, and outputs the valve opening position feedback signal.

[0044] The working process of the motor valve in this embodiment is as follows: Valve closed state: The motor valve is initially closed. The valve plug assembly 7 blocks the gas outlet 12. The trigger shaft 2 presses the first switch spring 3. The first switch spring 3 and the third switch spring 5 are connected, and the valve is closed in place signal is output. The control system recognizes that the valve is in the closed state.

[0045] Opening process: When the valve needs to be opened, the control system sends a start signal to the motor 21. The motor 21 drives the reduction assembly 22 to rotate, which in turn drives the screw 23 to rotate. The rotation of the screw 23 causes the nut bracket 6 to move away from the gas outlet 12 along the screw axis, which in turn drives the valve plug assembly 7 and the trigger shaft 2 to move. The trigger shaft 2 disengages from the first switch spring 3 and enters the transition area. At this time, there is no signal output, and the control system recognizes that the valve is in the opening process.

[0046] Valve opening state: When the nut bracket 6 moves to the limit position, the valve plug assembly 7 fully opens the gas outlet 12, the trigger shaft 2 squeezes the second switch spring 4, the second switch spring 4 and the third switch spring 5 are connected, and the valve opening signal is output; after the control system receives the valve opening signal, the control motor 21 stops running, the valve is stably in the open state, and the gas flows in from the inlet 11 and is output through the outlet 12.

[0047] Closing process: When the valve needs to be closed, the control system controls the motor 21 to reverse, driving the reduction assembly 22 and the screw 23 to rotate in the opposite direction. The nut bracket 6 drives the valve plug assembly 7 and the trigger shaft 2 to move towards the gas outlet 12. The trigger shaft 2 disengages from the second switch spring 4 and enters the transition area, with no signal output. Until the valve plug assembly 7 blocks the gas outlet 12, the trigger shaft 2 squeezes the first switch spring 3, outputting a valve-closed signal, and the motor 21 stops running, completing the closing process.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0049] Although this document frequently uses reference numerals from the figures, such as switch bracket 1, trigger shaft 2, first switch spring 3, second switch spring 4, third switch spring 5, nut bracket 6, valve plug assembly 7, signal feedback switch 8, valve body 10, gas inlet 11, gas outlet 12, drive assembly 20, motor 21, reduction assembly 22, and screw 23, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A signal feedback switch, characterized in that, It includes a switch bracket (1), a first switch spring (3), a second switch spring (4), a third switch spring (5), and a trigger shaft (2); the first switch spring (3), the second switch spring (4), and the third switch spring (5) are all detachably connected to the switch bracket (1); the trigger shaft (2) is adapted to and assembled with the first switch spring (3), the second switch spring (4), and the third switch spring (5).

2. The signal feedback switch according to claim 1, characterized in that, The first switch spring (3), the second switch spring (4), and the third switch spring (5) are distributed at a predetermined interval on the switch bracket (1).

3. The signal feedback switch according to claim 1, characterized in that, The detachable connection is either a snap-fit ​​connection or a bolt connection.

4. The signal feedback switch according to claim 1, characterized in that, The trigger shaft (2) connects the squeezed spring (3) or the second switch spring (4) to the third switch spring (5).

5. The signal feedback switch according to claim 1, characterized in that, The first switch spring (3), the second switch spring (4) and the third switch spring (5) are all conductive springs.

6. The signal feedback switch according to claim 1, characterized in that, The third switch spring (5) is located between the first switch spring (3) and the second switch spring (4), and the trigger shaft (2) switches its operating position between the first switch spring (3) and the third switch spring (5) and between the second switch spring (4) and the third switch spring (5).

7. The signal feedback switch according to claim 1, characterized in that, The trigger shaft (2) is a conductive shaft. When the trigger shaft (2) is connected to the corresponding switch spring, a conductive circuit is formed to output a feedback signal.

8. The signal feedback switch according to claim 1, characterized in that, The trigger shaft (2) is a cylindrical structure, and the diameter of the trigger shaft (2) matches the contact spacing of the first switch spring (3), the second switch spring (4), and the third switch spring (5).

9. A motor valve comprising the signal feedback switch according to any one of claims 1-8, characterized in that, The device includes a valve body (10) and a drive assembly (20) installed inside the valve body (10); the valve body (10) has a gas inlet (11) and a gas outlet (12) that are interconnected; the drive assembly (20) is provided with a valve plug assembly (7) for controlling the opening or closing of the gas outlet (12); the signal feedback switch (8) is fixedly installed inside the drive assembly (20), and the switch bracket (1) of the signal feedback switch (8) is fixedly connected to the inner wall of the drive assembly (20) by screws.

10. The motor valve according to claim 9, characterized in that, It also includes a deceleration assembly (22), a screw (23) and a nut bracket (6); the drive assembly (20) includes a motor (21), which drives the screw (23) to rotate by driving the deceleration assembly (22). When the screw (23) rotates, it drives the nut bracket (6) to move linearly along the axis of the screw (23). The nut bracket (6) drives the valve plug assembly (7) to move synchronously to realize the opening and closing of the valve. The nut bracket (6) is fixedly connected to the end of the trigger shaft (2) of the signal feedback switch (8) away from the switch spring, and drives the trigger shaft (2) to move synchronously to trigger signal feedback.

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