Electric mechanism with manual control function

Abstract

The invention relates to an electric mechanism with a manual control function, which comprises a motor, a sector gear, an output shaft, a manual control assembly and a control module which are arranged in a shell, the control module is used for sending a control signal to the motor, the sector gear is fixedly arranged on the output shaft, the motor drives the output shaft to rotate within a specified angle through the sector gear, and the manual control assembly is arranged on the output shaft. The rear end of the output shaft penetrates through the shell and is connected to the valve; the manual control assembly comprises a limiting disc, a handle, an adjusting stud, a first spring, an ejector rod and a roller. According to the electric mechanism, by means of the lever principle, a handle mode is adopted, larger torque can be provided, more labor is saved, the flexibility can be effectively improved, and a signal for opening and closing a valve can be responded in time; meanwhile, the sector gear is adopted, when the output shaft is out of control and continuously rotates, the special structure of the sector gear is used for interrupting power transmission of the motor, the motor is made to idle, the valve is prevented from being damaged, and therefore the stability of valve control is improved, and operation safety is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of valve control technology, and specifically relates to an electric mechanism that also has manual control function. Background Technology

[0002] The electric actuator is the unit that controls the opening and closing of the valve. By receiving external control signals, it drives the valve to open, close, and adjust its angle. When power failure or system malfunction occurs, the electric actuator will be unable to control the valve properly. In this case, manual operation is required to control the valve. In current technology, a handwheel is usually used to achieve manual control. Although this method is reliable, the handwheel is relatively laborious to operate, has poor flexibility, and cannot respond to valve opening and closing signals in a timely manner. In addition, severe system malfunctions may even damage the valve. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to address the shortcomings of the prior art by providing an electric mechanism that also has manual control function, thereby improving the stability of valve control.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An electric mechanism with manual control function includes a motor, a sector gear, an output shaft, a manual control component, and a control module disposed within a housing. The control module is used to send control signals to the motor. The sector gear is fixedly disposed on the output shaft. The motor drives the output shaft to rotate within a specified angle through the sector gear. The rear end of the output shaft passes through the housing and is connected to a valve. The manual control assembly includes a limit plate, a handle, an adjusting stud, a spring, a push rod, and a roller. The limit plate is fixedly mounted on the output shaft. The front end of the handle is connected to the limit plate, and the rear end of the handle extends to the outside of the housing. The push rod is slidably mounted inside the housing. The adjusting stud is threadedly connected to the housing. The spring is positioned between the adjusting stud and the push rod. The roller is positioned at the tail of the push rod and presses against the side of the limit plate under the action of the spring. The side of the limit plate has two circumferentially oriented grooves. Rotating the handle around the circumference of the output shaft causes the roller to roll between the side of the limit plate and the circumferential grooves.

[0005] To better realize the present invention, the above structure is further optimized, and the limiting groove is an arc-shaped structure.

[0006] To better realize the present invention, the above structure is further optimized. The front end of the adjusting stud is provided with an internal hexagonal groove, the rear end of the adjusting stud is provided with a sleeve post, the front end of the push rod is provided with a slot, one end of the spring is sleeved on the sleeve post, and the other end is provided in the slot.

[0007] To better realize the present invention, the above structure is further optimized by including a gear reducer, through which the motor meshes with a sector gear for transmission.

[0008] To better realize the present invention, the above structure is further optimized by providing valve switch markings on the left and right sides of the handle on the housing.

[0009] To better realize the present invention, the above structure is further optimized, and the control module is a circuit control board.

[0010] To better realize the present invention, further optimizations are made to the above structure. A triggering component and a feedback component are also provided inside the housing. The feedback component includes a pin and two microswitches mounted on the mounting plate. The mounting plate is fixedly mounted inside the housing. The microswitches are used to send switching signals to the control module. The pin is vertically mounted on the mounting plate. The two microswitches are symmetrically mounted on both sides of the pin. Two transmission levers are rotatably mounted on the pin. A second spring is provided between the front ends of the two transmission levers. The second spring pushes the front ends of the two transmission levers to press and activate the two microswitches respectively. The triggering component includes a vertically rotating shaft mounted on the mounting plate. The shaft and the output shaft are driven by a gear set with a gear ratio of 1. The shaft is equipped with a trigger element that is circumferentially opposite to the rear ends of the two transmission levers. Rotating the output shaft in either the forward or reverse direction can cause the trigger element to press against the rear end of one of the transmission levers individually, thereby causing the front end of the corresponding transmission lever to overcome the pressure of the second spring and release the micro switch.

[0011] To better realize the present invention, the above structure is further optimized. The actuating element includes a positioning block and two positioning pins. The positioning block is fixedly mounted on the rotating shaft, and the two positioning pins are symmetrically mounted on both sides of the positioning block. Rotating the output shaft in the forward or reverse direction can cause one of the positioning pins to press against the rear end of a transmission lever.

[0012] To better realize the present invention, the above structure is further optimized. The transmission lever is "L" shaped, and the front ends of the two transmission levers are provided with mounting grooves on opposite surfaces. The two ends of the second spring are respectively set in the two mounting grooves.

[0013] To better realize the present invention, the above structure is further optimized so that the positions of the two mounting slots are opposite.

[0014] Compared with the prior art, the present invention has the following advantages: The electric mechanism provided by this invention is equipped with a manual control component that is easy to operate and precise to control. By using a lever principle and a handle mode, it can provide greater torque, save more effort, effectively improve flexibility, and respond to valve opening and closing signals in a timely manner. At the same time, it uses a sector gear. When the output shaft rotates uncontrollably, the special structure of the sector gear interrupts the transmission of motor power, allowing the motor to idle and preventing the valve from being damaged. This improves the stability of valve control and ensures safe operation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 yes Figure 2 The main view; Figure 4 This is a schematic diagram of the connection structure between the sector gear, the manual control component, and the output shaft in this invention; Figure 5 yes Figure 4 The main view; Figure 6 This is one of the schematic diagrams of the connection structure between the trigger and the transmission lever in this invention; Figure 7 This is the second schematic diagram of the connection structure between the trigger and the transmission lever in this invention; Figure 8 This is a top view of the actuating element and the transmission lever in this invention.

[0017] In the picture: 1-Housing, 101-Valve switch mark, 2-Motor, 3-Sector gear, 4-Output shaft, 5-Manual control component, 501-Limit plate, 5011-Limit groove, 502-Handle, 503-Adjusting stud, 5031-Hex socket, 5032-Sleeve, 504-Spring 1, 505-Push rod, 5051-Slot, 506-Roller, 6-Control module, 7-Gear reducer, 8-Mounting plate, 9-Pin, 10-Micro switch, 11-Transmission lever, 1101-Mounting groove, 12-Spring 2, 13-Rotating shaft, 14-Gear set, 15-Actuating element, 1501-Positioning block, 1502-Positioning pin. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," 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 the invention 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 of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should also 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Please refer to Figures 1-8The electric mechanism with manual control function provided by this invention includes a motor 2, a sector gear 3, an output shaft 4, a manual control component 5, and a control module 6, all housed within a housing 1. The control module 6 is a circuit control board used to send control signals to the motor 2 to control its forward and reverse rotation. The sector gear 3 is fixedly mounted on the output shaft 4, which is rotatably mounted within the housing 1 via bearings. The motor 2 drives the output shaft 4 to rotate within a specified angle via the sector gear 3. Due to the presence of the sector gear 3, when the output shaft 4 rotates uncontrollably and continuously, the transmission is broken when the sector gear 3 rotates to a position where there are no meshing teeth. The power of the motor 2 can no longer be transmitted to the output shaft 4 through the sector gear 3, and the output shaft 4 loses power and stops rotating. The special structure of the sector gear 3 interrupts the power transmission of the motor 2, allowing the motor 2 to idle, preventing damage to the valve, thereby improving the stability of valve control and ensuring operational safety. The rear end of the output shaft 4 passes through the housing 1 and is connected to the valve. The motor 2 is driven by the gear reducer 7 meshing with the sector gear 3 to increase the output torque, so that the output shaft 4 can quickly open and close the valve.

[0022] like Figure 4 and Figure 5 As shown, the manual control component 5 includes a limit plate 501, a handle 502, an adjusting stud 503, a spring 504, a push rod 505, and a roller 506. The limit plate 501 is fixedly mounted on the output shaft 4 by fastening screws. The front end of the handle 502 is connected to the limit plate 501, and the rear end of the handle 502 extends to the outside of the housing 1. The housing 1 has a channel for accommodating the handle 502 to swing around the circumference. By moving the rear end of the handle 502 around the circumference of the output shaft 4, it can drive the output shaft 4 to rotate a certain angle, thereby controlling the opening and closing of the valve when the power is off. The push rod 505 is slidably disposed inside the housing 1. The adjusting stud 503 is threadedly connected to the housing 1. The spring 504 is disposed between the adjusting stud 503 and the push rod 505. The roller 506 is disposed at the tail of the push rod 505 and presses against the side of the limiting plate 501 under the action of the spring 504. The side of the limiting plate 501 has two limiting grooves 5011 along the circumferential direction. The limiting grooves 5011 are arc-shaped. The arc-shaped structure design allows the roller 506 to smoothly enter and exit the limiting grooves 5011 without jamming. Rotating the handle 502 around the output shaft 4 allows the roller 506 to roll between the side of the limiting plate 501 and the limiting grooves 5011. When the handle 502 is manually turned, the roller 506 falling into the limit groove 5011 indicates that the valve has been fully opened or closed. If the handle 502 is to be turned to the opposite position, a certain amount of additional force needs to be applied to push the roller 506 out of the limit groove 5011. This serves as a limit and indicator, indicating whether the valve is fully open or closed, and also provides a certain amount of resistance to prevent accidental valve operation and improper opening or closing.

[0023] The front end of the adjusting stud 503 is provided with an internal hexagonal groove 5031 for easy adjustment with a wrench. The rear end of the adjusting stud 503 is provided with a sleeve 5032, and the front end of the push rod 505 has a slot 5051. One end of the spring 504 is fitted onto the sleeve 5032, and the other end extends into the slot 5051. The distance between the adjusting stud 503 and the push rod 505 is adjusted by turning the adjusting stud 503 with a wrench, thereby controlling the pressure applied by the spring 504 to the push rod 505. In actual use, the adjustment is made according to the force of pushing the handle 502. If the spring force is too small, the limiting groove 5011 cannot play a certain limiting role for the roller 506. If the spring force is too large, it is difficult to push the roller 506 out of the limiting groove 5011. Therefore, it is necessary to adjust it manually according to the actual situation. In addition, valve switch markings 101 are provided on the housing 1 on both sides of the handle 502 to facilitate the identification of the valve opening and closing direction and avoid misoperation.

[0024] like Figures 6-8 As shown, the housing 1 also includes a triggering component and a feedback component. The feedback component includes a pin 9 mounted on a mounting plate 8 and two microswitches 10. The mounting plate 8 is fixedly mounted inside the housing 1 for support. The microswitches 10 are used to send switching signals to the control module 6, enabling the control module 6 to obtain the rotation status of the output shaft 4, thereby forming a closed-loop control. This prevents the output shaft 4 from failing to move after the control module 6 sends a rotation signal to the motor 2, and provides precise position information support for the next step of controlling the output shaft 4. The specific structure is as follows: the pin 9 is vertically mounted on the mounting plate 8, and the two microswitches 10 are symmetrically arranged on both sides of the pin 9. Two transmission levers 11 are rotatably mounted on the pin 9, and a spring 12 is arranged between the front ends of the two transmission levers 11. The spring 12 pushes the front ends of the two transmission levers 11 to press and actuate the two microswitches 10 respectively.

[0025] In this embodiment, the transmission lever 11 is designed in an "L" shape, with two "L"-shaped transmission levers 11 arranged symmetrically on the left and right. Each of the two transmission levers 11 has a mounting groove 1101 on its opposite front end. The two ends of the second spring 12 are respectively positioned within the two mounting grooves 1101, ensuring that the second spring 12 maintains its position during compression and extension. The two mounting grooves 1101 are positioned opposite each other. By modifying the front end of the transmission lever 11 and adding an extension, the mounting grooves 1101 at the front ends of the two transmission levers 11 are aligned, thus avoiding the impact of misalignment of the two transmission levers 11.

[0026] The triggering component includes a vertically rotatable shaft 13 mounted on the mounting plate 8. The shaft 13 and the output shaft 4 are driven by a gear set 14 with a transmission ratio of 1:1, meaning that the shaft 13 and the output shaft 4 move synchronously, and the angle rotated by the output shaft 4 is accurately fed back to the shaft 13. The shaft 13 is provided with an actuating element 15 that is circumferentially opposite to the rear ends of the two transmission levers 11. Rotating the output shaft 4 in either the forward or reverse direction causes the actuating element 15 to press against the rear end of one of the transmission levers 11 individually, thereby causing the front end of the corresponding transmission lever 11 to overcome the pressure of the spring 12 and release the micro switch 10.

[0027] In this embodiment, the actuating element 15 includes a positioning block 1501 and two positioning pins 1502. The positioning block 1501 is fixedly mounted on the rotating shaft 13, and the two positioning pins 1502 are symmetrically arranged on both sides of the positioning block 1501. Rotating the output shaft 4 in the forward or reverse direction can cause one of the positioning pins 1502 to press against the rear end of a transmission lever 11, thereby causing the front end of the transmission lever 11 corresponding to the rear end to overcome the pressure of the spring 12 and release the micro switch 10. At the same time, the micro switch 10 feeds back the position signal to the control module 6. The control module 6 receives the sent position signal and obtains the real-time position information of the output shaft 4. It can then switch the current direction according to the position information to control the forward and reverse rotation of the motor 2, or keep the output shaft 4 at a specified angle. In addition, to improve reliability, the control module 6 also has reverse connection protection and overvoltage protection functions.

[0028] Furthermore, the positioning pin 1502 can be a screw or a pin with adjustable length. When it is necessary to adjust the rotation angle of the output shaft 4, it is only necessary to adjust the length of the positioning pin 1502 from the rear end of the transmission lever 11. For example, if it is necessary to increase the rotation angle of the output shaft 4 according to the valve, the distance between the end of the positioning pin 1502 and the rear end of the transmission lever 11 is increased. In this way, when the output shaft 4 rotates, the output shaft 4 needs to rotate a longer distance to touch the rear end of the transmission lever 11. Therefore, the rotation angle of the output shaft 4 also becomes larger, the time for the front end of the transmission lever 11 to release the micro switch 10 becomes longer, and the time for the control module 6 to receive the signal also becomes longer, thus making the closed loop period longer. Conversely, if it is necessary to reduce the rotation angle of the output shaft 4, it is only necessary to reduce the length of the positioning pin 1502 from the rear end of the transmission lever 11 to shorten the closed loop period.

[0029] Working principle: During normal operation, the control module 6 sends a control signal to the motor 2, causing the motor 2 to mesh with the sector gear 3 through the gear reducer 7, increasing the output torque. The sector gear 3 then drives the output shaft 4 to rotate, enabling the output shaft 4 to quickly open or close the valve. Simultaneously, the rotating shaft 13, which moves synchronously with the output shaft 4, drives the actuating element 15 to rotate. The positioning pin 1502 on the actuating element 15 presses against the rear end of a transmission lever 11, thereby causing the front end of the transmission lever 11 corresponding to the rear end to overcome the pressure of the spring 12 and release the micro switch 10. At the same time, the micro switch 10 feeds back the position signal to the control module 6. Upon receiving the position signal, the control module 6 controls the motor 2 to keep the output shaft 4 stationary at a specified angle (or controls the motor 2 to rotate in the opposite direction by switching the current direction). The position of the output shaft 4 can be fed back to the control module 6 in real time, thereby realizing closed-loop control.

[0030] When the system is powered off, the valve needs to be controlled by the manual control component 5. First, determine the valve's opening and closing direction according to the valve switch mark 101, and then push the handle 502 to rotate in the corresponding direction. When it is rotated to the designated position, the roller 506 will fall into the limit groove 5011. At this time, it means that the handle 502 has been rotated to the correct position. If you want to switch the valve's opening and closing state, push the handle 502 in the opposite direction.

[0031] When the system malfunctions and the control module 6 cannot control the operation of the motor 2, the motor 2 will drive the sector gear 3 to continue rotating through the gear reducer 7. When the sector gear 3 rotates to a position where there are no meshing teeth, the transmission between the gear reducer 7 and the sector gear 3 is disconnected. The power of the motor 2 will not be able to be transmitted to the output shaft 4 through the sector gear 3. The output shaft 4 loses power and stops rotating, preventing the valve from being damaged by the large torque output by the output shaft 4.

[0032] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electric mechanism with both manual and manual control functions, characterized in that: The device includes a motor (2), a sector gear (3), an output shaft (4), a manual control component (5), and a control module (6) housed within a housing (1). The control module (6) is used to send control signals to the motor (2). The sector gear (3) is fixedly mounted on the output shaft (4). The motor (2) drives the output shaft (4) to rotate within a specified angle via the sector gear (3). The rear end of the output shaft (4) passes through the housing (1) and connects to a valve. The manual control component (5) includes a limiting plate (501), a handle (502), an adjusting stud (503), a spring (504), a push rod (505), and a roller (506). The limiting plate (501) is fixedly mounted on the output shaft (4). The front end of the handle (502) is connected to the limiting plate (501), and the rear end of the handle (502) extends to the outside of the housing (1). The push rod (505) is slidably mounted inside the housing (1). The adjusting stud (503) is threadedly connected to the housing (1). Spring 1 (504) is disposed between the adjusting stud (503) and the push rod (505). Roller (506) is disposed at the tail of the push rod (505) and presses against the side of the limiting plate (501) under the action of spring 1 (504). The side of the limiting plate (501) has two limiting grooves (5011) along the circumferential direction. Rotating the handle (502) around the output shaft (4) can make the roller (506) roll between the side of the limiting plate (501) and the limiting grooves (5011).

2. The electric mechanism with manual control function according to claim 1, characterized in that: The limiting groove (5011) has an arc-shaped structure.

3. An electric mechanism with manual control function according to claim 2, characterized in that: The front end of the adjusting stud (503) is provided with an internal hexagonal groove (5031), the rear end of the adjusting stud (503) is provided with a sleeve (5032), the front end of the push rod (505) is provided with a slot (5051), one end of the spring (504) is sleeved on the sleeve (5032), and the other end is provided in the slot (5051).

4. An electric mechanism with manual control function according to claim 1, characterized in that: It also includes a gear reducer (7), through which the motor (2) meshes with the sector gear (3).

5. An electric mechanism with manual control function according to claim 1, characterized in that: Valve switch markings (101) are provided on the left and right sides of the handle (502) on the housing (1).

6. An electric mechanism with manual control function according to claim 1, characterized in that: The control module (6) is a circuit control board.

7. An electric mechanism with manual control function according to any one of claims 1-6, characterized in that: The housing (1) is also provided with a triggering component and a feedback component. The feedback component includes a pin (9) and two micro switches (10) set on the mounting plate (8). The mounting plate (8) is fixedly set in the housing (1). The micro switches (10) are used to send a switch signal to the control module (6). The pin (9) is vertically set on the mounting plate (8). The two micro switches (10) are symmetrically set on both sides of the pin (9). Two transmission levers (11) are rotatably set on the pin (9). A second spring (12) is set between the front ends of the two transmission levers (11). The second spring (12) pushes the front ends of the two transmission levers (11) to press and activate the two micro switches (10) respectively. The triggering component includes a rotating shaft (13) that is vertically rotatably mounted on the mounting plate (8). The rotating shaft (13) and the output shaft (4) are driven by a gear set (14) with a transmission ratio of 1. The rotating shaft (13) is provided with a trigger (15) that is circumferentially opposite to the rear end of the two transmission levers (11). Rotating the output shaft (4) in the forward or reverse direction can cause the trigger (15) to press against the rear end of one of the transmission levers (11) individually, thereby causing the front end of the corresponding transmission lever (11) to overcome the pressure of the second spring (12) and release the micro switch (10).

8. An electric mechanism with manual control function according to claim 7, characterized in that: The actuating element (15) includes a positioning block (1501) and two positioning pins (1502). The positioning block (1501) is fixedly mounted on the rotating shaft (13), and the two positioning pins (1502) are symmetrically arranged on both sides of the positioning block (1501). Rotating the output shaft (4) in the forward or reverse direction can cause one of the positioning pins (1502) to press against the rear end of one of the transmission levers (11) individually.

9. An electric mechanism with manual control function according to claim 8, characterized in that: The transmission lever (11) is "L" shaped, and the front ends of the two transmission levers (11) are provided with mounting grooves (1101) on opposite surfaces. The two ends of the second spring (12) are respectively set in the two mounting grooves (1101).

10. An electric mechanism with manual control function according to claim 9, characterized in that: The two mounting slots (1101) are positioned opposite each other.

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