An electric valve actuator

Abstract

The utility model discloses an electric valve actuator, including bottom shell, face cover, power component, output component, clutch component and transmission component, and power component includes drive motor and the motor gear on its output shaft, and output component includes valve output connecting sleeve pipe and the output gear of rotation connection at its end, and clutch component includes manual clutch press bar and clutch gear, and the side edge of clutch gear passes through the axial stop piece on manual clutch press bar and is linked with manual clutch press bar, and transmission component includes first transmission gear, second transmission gear, third transmission gear, when pressing manual clutch press bar, axial stop piece drives clutch gear to move upwards and separates from the meshing of second transmission gear, makes the power of power component unable to be transmitted to output gear. The utility model discloses the linkage design of manual clutch press bar and clutch gear, and the power transmission can be cut off by pressing, realizes manual operation, and after loosening, automatic reset restores electric drive, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of valve actuator technology, and more specifically, to an electric valve actuator. Background Technology

[0002] An electric valve actuator is an electrically driven device used to control the opening, closing, or adjustment of a valve's position, thereby achieving automated control of the flow, pressure, or direction of fluids (liquids, gases, etc.). A traditional electric valve actuator, such as the one disclosed in utility model publication CN217177601U, includes a housing and an end cover. A main gear is connected to the motor's output shaft, and the main gear rotates with the motor's output shaft. The main gear is connected to a follower gear via a transmission gear, and the follower gear is fixed to the main shaft and drives the main shaft to rotate. This patent's power transmission system typically uses a fixed connection, which creates a mechanical lock when the motor stops, hindering manual operation. Furthermore, it lacks a quick switching mechanism, making it impossible to promptly switch to manual mode to control the valve's state, leading to valve control failure. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide an electric valve actuator with a quick clutch function and support for convenient switching between electric and manual modes.

[0004] To achieve the above objectives, this utility model provides an electric valve actuator, including a base shell, a cover, a power component, an output component, a clutch component, and a transmission component. The power component, output component, clutch component, and transmission component are all installed between the base shell and the cover. The power component includes a drive motor and a motor gear connected to its output shaft. The output component includes a valve output connecting sleeve and an output gear rotatably connected to its end. The clutch component includes a manual clutch push rod and a clutch gear. One edge of the clutch gear is linked to the manual clutch push rod via an axial limiting member on the push rod sleeve. The transmission component includes a first transmission gear, a second transmission gear, and a third transmission gear. The first transmission gear meshes with the motor gear. The second transmission gear meshes with the first transmission gear via the clutch gear. The third transmission gear meshes with the second transmission gear. The output gear meshes with the third transmission gear. When the manual clutch push rod is pressed, the axial limiting member causes the clutch gear to move upward and disengage from the second transmission gear, preventing the power from the power component from being transmitted to the output gear.

[0005] Preferably, the axial limiting member is configured as a limiting opening groove that is vertically connected to the outer wall of the sleeve of the manual clutch pressing rod.

[0006] Preferably, the manual clutch push rod further includes a clutch spring and a clutch support shaft. The axial limiting member is fixedly connected to the outer wall of the rod sleeve. The tail end of the rod sleeve has a stepped mounting cavity for accommodating the clutch support shaft along its axial direction. The clutch support shaft is fixedly installed at the bottom of the cover and located in the stepped mounting cavity. The clutch spring is sleeved on the clutch support shaft and located between the cover and the stepped mounting cavity. By pressing or releasing the head pressing end of the rod sleeve, the clutch spring can be compressed, thereby controlling the engagement or disengagement of the clutch gear and the second transmission gear through the axial limiting member.

[0007] Preferably, the output gear is configured as a sector gear, and a spline shaft for connecting to an external valve is fixedly provided at the center of the mounting end of the output gear.

[0008] Preferably, the output assembly further includes a first output end ball bearing and a second output end ball bearing. The first output end ball bearing is sleeved between the end of the valve output connecting sleeve and the bottom of the mounting end of the output gear. The output gear is rotatably connected to the valve output connecting sleeve through the first output end ball bearing. The second output end ball bearing is sleeved on the outside of the spline shaft and located at the top of the mounting end of the output gear.

[0009] Preferably, the top of the spline shaft and the second output ball bearing protrudes from the top surface of the cover.

[0010] Preferably, the system also includes a first encoder gear and a second encoder gear, wherein the first encoder gear is mounted on one side of the bottom of the third transmission gear, and the second encoder gear is mounted on the bottom housing and located on the other side of the third transmission gear.

[0011] Preferably, the drive motor of the power component is a brushless motor.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model features a novel structure and reasonable design. A drive motor drives a multi-stage transmission gear to reduce speed and increase torque, which in turn drives the output gear. The clutch assembly controls the engagement state between the clutch gear and the second transmission gear via a manual clutch lever. Pressing the manual clutch lever disengages the clutch gear, cutting off power transmission and allowing direct manual operation of the valve. Releasing the lever automatically resets the clutch using a clutch spring, restoring the electric drive state. This enables convenient switching between electric and manual modes. The design is compact, efficient, and precisely controls valve movement. It can be manually operated even during power outages, making it highly practical. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an exploded view of the electric valve actuator provided in this embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the electric valve actuator provided in this embodiment of the utility model (default gear meshing state);

[0017] Figure 3 This is a schematic diagram of the internal structure of the electric valve actuator provided in this embodiment of the utility model (clutch disengagement state). Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Please refer to Figure 1 This utility model provides an electric valve actuator, including a base shell 1, a cover 2, a power component, an output component, a clutch component, and a transmission component. The power component includes a drive motor 3 and a motor gear 31 connected to its output shaft. The output component includes a valve output connecting sleeve 4 and an output gear 41 rotatably connected to its end. The clutch component includes a manual clutch push rod 5 and a clutch gear 51. The transmission component includes a first transmission gear 61, a second transmission gear 62, and a third transmission gear 63. The various components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, the power assembly, output assembly, clutch assembly, and transmission assembly can all be installed between the base shell 1 and the cover 2 at intervals. The base shell 1 and the cover 2 serve as the main frame of the actuator, providing installation support for the power assembly, output assembly, clutch assembly, and transmission assembly, forming a closed installation space to protect the internal components.

[0021] like Figure 2As shown, one edge of the clutch gear 51 can be linked with the manual clutch push rod 5 via the axial limiting member 50 on the sleeve 501 of the manual clutch push rod 5. The first transmission gear 61 meshes with the motor gear 31, the second transmission gear 62 can mesh with the first transmission gear 61 through the clutch gear 51, the third transmission gear 63 meshes with the second transmission gear 62, and the output gear 41 meshes with the third transmission gear 63. The transmission assembly is driven by the meshing of the first transmission gear 61, the second transmission gear 62, and the third transmission gear 63. Through multi-stage gear transmission, the speed is reduced, which can increase the output torque and enable the output gear to obtain sufficient force to drive the external valve, meeting the torque requirements of valve control. In addition, the cooperation between the second transmission gear 62 and the clutch gear 41 can realize the connection or disconnection of power transmission under the operation of the manual clutch push rod 5, flexibly switching between electric and manual operation modes, further improving the ease of use and reliability of the actuator.

[0022] Preferably, the drive motor 3 of the power component can be set as a brushless motor. Brushless motors have advantages such as high efficiency, low noise, long life and convenient maintenance, and can provide stable and reliable power to the actuator.

[0023] Among them, the valve output connecting sleeve 4 connects the output gear 41 to the external valve, provides installation support for the output gear 41, and transmits the rotation of the output gear 41 to the external valve; the manual clutch push rod 5 controls the engagement or disengagement of the clutch gear 51 and the second transmission gear 52 by pressing or releasing, realizing the switching between electric and manual operation;

[0024] In this embodiment, the axial limiting member 50 can be configured as a limiting opening groove that is vertically connected to the outer wall of the sleeve 501 of the manual clutch pressing rod 5.

[0025] In practice, when the manual clutch lever 5 is pressed, the axial limiting member 50 drives the clutch gear to move upward and disengage from the second transmission gear 62, thus the clutch takes effect, preventing the power assembly from transmitting the power of the drive motor 3 to the output gear 41.

[0026] Specifically, the manual clutch push lever 5 may also include a clutch spring 502 and a clutch support shaft 503. An axial limiting member 50 is fixedly connected to the outer wall of the lever sleeve 501. The tail end of the lever sleeve 501 is provided with a stepped mounting cavity for accommodating the clutch support shaft 503 along its axial direction. The clutch support shaft 503 is fixedly installed at the bottom of the face cover 2 and located in the stepped mounting cavity. The clutch spring 502 is sleeved on the clutch support shaft 503 and located between the face cover 2 and the stepped mounting cavity.

[0027] In practice, pressing or releasing the head pressing end of the lever sleeve 501 can compress the clutch spring 502, thereby controlling the engagement or disengagement of the clutch gear 51 and the second transmission gear 62 through the axial limiting member 50; the clutch spring 502 enables the manual clutch pressing lever 5 to automatically reset after being released, ensuring the normal engagement of the clutch gear 51 and the second transmission gear 52, and realizing the automatic recovery of the electric operation mode.

[0028] Preferably, the output gear 41 can be configured as a sector gear, and a splined shaft 42 for connecting to an external valve is fixedly provided in the middle of the mounting end of the output gear 41.

[0029] Specifically, the output assembly may also include a first output end ball bearing 43 and a second output end ball bearing 44. The first output end ball bearing 43 is sleeved between the end of the valve output connecting sleeve 4 and the bottom of the mounting end of the output gear 41. The output gear 41 is rotatably connected to the valve output connecting sleeve 4 through the first output end ball bearing 43. The second output end ball bearing 44 is sleeved on the outside of the spline shaft 42 and located at the top of the mounting end of the output gear 41.

[0030] The first output end ball bearing 43 reduces the friction between the output gear 41 and the valve output connecting sleeve 4, allowing the output gear 41 to rotate flexibly. The second output end ball bearing 44 further supports the rotation of the output gear 41, enhancing the stability and load-bearing capacity of the output gear 41 and preventing swaying or jamming.

[0031] To facilitate quick docking with external valves, the tops of both the spline shaft 42 and the second output ball bearing 44 can protrude from the top surface of the cover 2.

[0032] Preferably, it may also include a first encoder gear 7 and a second encoder gear 8 for detecting the rotational position or angle of the valve. The first encoder gear 7 is mounted on one side of the bottom of the third transmission gear 63, and the second encoder gear 8 is mounted on the bottom housing 1 and located on the other side of the third transmission gear 63.

[0033] The working principle of this embodiment is as follows:

[0034] In the default gear meshing state, such as Figure 2 As shown, the manual clutch lever is in a pop-up state under the action of the clutch spring, the clutch gear meshes with the second transmission gear, and the drive motor can drive the motor gear to rotate after being powered on. The motor gear meshes with the first transmission gear, the second transmission gear, and the third transmission gear in sequence, and finally drives the output gear to rotate. The output gear drives the external valve to open or close through the spline shaft, so as to realize the valve opening and closing by controlling the forward and reverse rotation of the drive motor.

[0035] When the clutch is disengaged, such as Figure 3 As shown, pressing the head of the manual clutch lever compresses the clutch spring, which in turn moves the axial limiting component on its sleeve upward, causing the clutch gear to move upward and disengage from the second transmission gear, thus cutting off power transmission. At this time, the external valve can be operated manually to achieve manual control. After releasing the manual clutch lever, the clutch spring returns to its original position, and the clutch gear re-engages with the second transmission gear, restoring the default gear engagement state.

[0036] In summary, this utility model drives the output gear by driving a multi-stage transmission gear through a drive motor to reduce speed and increase torque. The clutch assembly controls the meshing state of the clutch gear and the second transmission gear through a manual clutch push rod. When the manual clutch push rod is pressed, the clutch gear disengages, cutting off power transmission, allowing direct manual operation of the valve. After releasing, the clutch spring automatically resets the valve, restoring the electric drive state. This enables convenient switching between electric and manual modes. The structure is compact, efficient, and can accurately control valve action. It can be manually operated even in the event of a power outage, making it highly practical.

[0037] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. An electric valve actuator, characterized in that: The device includes a base shell, a top cover, a power assembly, an output assembly, a clutch assembly, and a transmission assembly. All components are mounted between the base shell and the top cover. The power assembly includes a drive motor and a motor gear connected to its output shaft. The output assembly includes a valve output connecting sleeve and an output gear rotatably connected to its end. The clutch assembly includes a manual clutch push rod and a clutch gear. One edge of the clutch gear is linked to the manual clutch push rod via an axial limiting member on the push rod sleeve. The transmission assembly includes a first transmission gear, a second transmission gear, and a third transmission gear. The first transmission gear meshes with the motor gear. The second transmission gear meshes with the first transmission gear via the clutch gear. The third transmission gear meshes with the second transmission gear. The output gear meshes with the third transmission gear. When the manual clutch push rod is pressed, the axial limiting member causes the clutch gear to move upward and disengage from the second transmission gear, preventing the power from the power assembly from being transmitted to the output gear.

2. The electric valve actuator according to claim 1, characterized in that: The axial limiting component is configured as a limiting opening groove that is vertically connected to the outer wall of the sleeve of the manual clutch pressing rod.

3. An electric valve actuator according to claim 2, characterized in that: The manual clutch push rod also includes a clutch spring and a clutch support shaft. The axial limiting member is fixedly connected to the outer wall of the rod sleeve. The tail end of the rod sleeve has a stepped mounting cavity for accommodating the clutch support shaft along its axial direction. The clutch support shaft is fixedly installed at the bottom of the cover and located in the stepped mounting cavity. The clutch spring is sleeved on the clutch support shaft and located between the cover and the stepped mounting cavity. By pressing or releasing the head pressing end of the rod sleeve, the clutch spring can be compressed, thereby controlling the engagement or disengagement of the clutch gear and the second transmission gear through the axial limiting member.

4. An electric valve actuator according to claim 1, characterized in that: The output gear is configured as a sector gear, and a spline shaft for connecting to an external valve is fixedly provided at the center of the mounting end of the output gear.

5. An electric valve actuator according to claim 4, characterized in that: The output assembly further includes a first output end ball bearing and a second output end ball bearing. The first output end ball bearing is sleeved between the end of the valve output connecting sleeve and the bottom of the mounting end of the output gear. The output gear is rotatably connected to the valve output connecting sleeve through the first output end ball bearing. The second output end ball bearing is sleeved on the outside of the spline shaft and located at the top of the mounting end of the output gear.

6. An electric valve actuator according to claim 5, characterized in that: The tops of the splined shaft and the second output ball bearing are both exposed on the top surface of the cover.

7. An electric valve actuator according to claim 1, characterized in that: It also includes a first encoder gear and a second encoder gear, the first encoder gear being mounted on one side of the bottom of the third transmission gear, and the second encoder gear being mounted on the bottom housing and located on the other side of the third transmission gear.

8. An electric valve actuator according to claim 1, characterized in that: The drive motor of the power component is a brushless motor.

Images