A rotary valve electric drive actuator
By driving the hinge frame to rotate via a motor, the push rod is driven to move the valve core axially, which solves the problems of slow response speed and valve jamming of solenoid valves, making it suitable for complex working conditions of tractors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BODING JINGGONG INTELLIGENT TECH (SHANDONG) CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing technology, the response speed of the solenoid valve driven valve core is slow and there is a risk of valve jamming, which makes it unsuitable for complex working conditions of tractors.
The hinge frame is driven by a motor to rotate, and the push rod is driven by the transmission mechanism to move the valve core axially, eliminating the need for pilot oil flow and resulting in high mechanical structure stability.
It achieves faster valve core response speed, reduces valve jamming, and adapts to complex tractor operating conditions.
Smart Images
Figure CN224497654U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of directional valve technology, specifically to an electric actuator for a directional valve. Background Technology
[0002] A directional control valve is the "traffic commander" in a fluid power system. By precisely changing the connection between its internal flow channels, it switches the direction of fluid flow, thereby controlling the direction of action of the actuators and the state of the system (start, stop, unload, float). In a directional control valve, changing the connection between the flow channels is often achieved by the axial movement of the valve core. The valve body of the directional control valve has a valve hole, in which a valve core that can be driven to move axially is slidably installed. By moving the valve core axially, the position of the valve core is switched, thereby realizing the opening and closing of the oil inlet, oil return port and working port.
[0003] In existing technologies, the valve core driving device is mostly a solenoid valve, such as the solenoid valve disclosed in Chinese invention patent CN109707690B, "An Electro-proportional Load Sensitive Multi-way Valve with Integrated Hydraulic Lock." Solenoid valves, as valve core driving devices, have advantages such as high control precision and convenient operation. However, solenoid valves require pilot oil flow when driving the valve core, resulting in a relatively slow response speed. Furthermore, using solenoid valves as valve core driving devices carries the risk of valve jamming, making them unsuitable for the complex operating conditions of tractors. Utility Model Content
[0004] To address the aforementioned problems, this utility model provides an electric actuator for a directional valve, which solves the issues of slow response speed of the solenoid valve driven valve core in the prior art, the risk of valve jamming, and its unsuitability for complex working conditions of tractors.
[0005] This utility model is achieved using the following technical solution: a reversing valve electric actuator, including a first housing, a mounting cavity with an opening on one side on the first housing, a second housing fixedly mounted on the bottom of the first housing, a motor fixedly mounted inside the second housing, a rotating shaft rotatably mounted inside the mounting cavity, a hinge frame fixedly mounted on the rotating shaft, a push rod for driving the axial movement of the valve core is hinged at a position off the rotating shaft on the hinge frame, and a transmission mechanism is provided between the motor output shaft and the hinge frame, so that the motor can drive the hinge frame to rotate through the transmission mechanism.
[0006] With the above structure, the hinge frame is driven by a motor to rotate, thereby controlling the push rod to push the valve core to move axially. Compared with the solenoid valve as the driving device, the driving device in this utility model does not require the flow of pilot oil during driving, and the response speed of driving the valve core is faster. In addition, driving by a motor can effectively reduce the occurrence of valve jamming, making this device more adaptable to the complex working conditions of tractors.
[0007] Preferably, the transmission mechanism includes a first bevel gear rotatably mounted in the mounting cavity, the first bevel gear being coaxially and fixedly connected to the motor output shaft, and a second bevel gear coaxially and fixedly connected to the rotating shaft, meshing with the first bevel gear, the second bevel gear being fixedly connected to the hinge frame. Through the engagement of the first and second bevel gears, the motor can drive the rotating shaft to rotate, thereby causing the hinge frame to rotate, and thus pushing the valve core to move axially.
[0008] Preferably, the hinge frame includes a rotating sleeve coaxially and fixedly connected to the rotating shaft and the second bevel gear. A hinge plate is fixedly connected to the side wall of the rotating sleeve, and the hinge plate is hinged to the push rod. By setting the rotating sleeve and the hinge plate, the push rod is hinged to the hinge frame at a position offset from the rotating shaft, so that the hinge frame can push the valve core to move axially when rotating.
[0009] Preferably, two hinge plates are provided, located at opposite ends of the rotating sleeve. The two hinge plates are parallel to each other, with the hinge plate closer to the second bevel gear fixedly connected to the second bevel gear. The push rod is located between the two hinge plates. The arrangement of two parallel hinge plates makes the hinge connection between the hinge frame and the push rod more stable.
[0010] Preferably, the second bevel gear includes a flat plate portion fixedly connected to the rotating shaft coaxially and a tooth portion fixedly connected to one side of the flat plate portion. The side of the flat plate portion near the tooth portion is fixedly connected to a hinge frame, which is located inside the tooth portion. By fixing the flat plate portion of the second bevel gear to the hinge frame, the structure of this device is more compact, reducing the space occupied by the device.
[0011] Preferably, the hinge plate and the rotating sleeve are integrally formed. This integral forming of the hinge plate and rotating sleeve makes the hinge frame structure more stable and improves its service life.
[0012] Preferably, the push rod includes a hinged arm with one end hinged to the hinge frame, a connecting rod fixedly connected to the other end of the hinged arm, and a ball head fixedly connected to the end of the connecting rod away from the hinged arm for connecting to the valve core. The ball head, in conjunction with the mounting groove on the valve core, forms a universal structure, facilitating the push rod's tilting under the action of the hinge frame during the pushing of the valve core.
[0013] Preferably, the hinge arm is a block structure, with its two sides abutting against two hinge plates. This abutment arrangement between the hinge arm and the two hinge plates enhances the stability of the hinge frame when moving the push rod.
[0014] Preferably, the ball head, connecting rod, and hinge arm are integrally formed. This integral forming design makes the push rod structure more stable and increases its service life.
[0015] Preferably, the first housing extends upward and downward on the side near the opening of the mounting cavity to form mounting plates. The mounting plates enhance the stability of the device when mounted on the valve body of the reversing valve.
[0016] In summary, the beneficial effects of this invention are as follows: the motor output shaft drives the second bevel gear to rotate via the first bevel gear, which in turn drives the hinge frame to rotate via the rotating shaft. Simultaneously, the push rod, driven by the hinge frame, pushes the valve core to move axially. When switching the valve core is required, simply starting the motor directly drives the valve core's movement. Compared to a solenoid valve, this eliminates the need for pilot oil flow, resulting in a faster response speed in driving the valve core. Furthermore, compared to a solenoid valve, the mechanical structure of this device is more stable, and the force output by the push rod is more stable, effectively reducing the occurrence of valve jamming. This makes it more suitable for use on agricultural machinery such as tractors that need to operate under complex conditions. Attached Figure Description
[0017] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;
[0019] Figure 3 This is a schematic diagram of the internal mounting structure of the mounting cavity.
[0020] In the figure: 1-First housing; 2-Second housing; 3-Mounting plate; 4-Mounting cavity; 5-Ball head; 6-First bevel gear; 7-Plate section; 8-Rotating sleeve; 9-Hinge plate; 10-Hinge frame; 11-Hinge arm; 12-Connecting rod; 13-Rotating shaft; 14-Push rod; 15-Motor; 16-Gear tooth section; 17-Second bevel gear. Detailed Implementation
[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0022] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0023] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.
[0024] like Figure 1 , Figure 2 As shown, this utility model provides an electric actuator for a directional valve, including a first housing 1 for mounting on the valve body of the directional valve. The first housing 1 extends upwards and downwards on the side near the valve body to form mounting plates 3. A mounting cavity 4 is provided on the first housing 1, with an opening at one end near the valve body, corresponding to a valve hole on the valve body. A second housing 2 is fixedly mounted on the bottom of the first housing 1, and a motor 15 is fixedly mounted inside the second housing 2. A rotating shaft 13 is rotatably mounted inside the mounting cavity 4, and a hinge frame 10 is fixedly mounted on the rotating shaft 13. A push rod 14 for driving the axial movement of the valve core is hinged to the hinge frame 10 at a position offset from the rotating shaft 13. A transmission mechanism is provided between the output shaft of the motor 15 and the hinge frame 10, enabling the motor 15 to drive the hinge frame 10 to rotate via the transmission mechanism.
[0025] like Figure 2 , Figure 3 As shown, the transmission mechanism is any mechanism that can drive the rotating shaft to rotate. In this embodiment, the transmission mechanism includes a first bevel gear 6 rotatably installed in the mounting cavity 4. The first bevel gear 6 is coaxially and fixedly connected to the output shaft of the motor 15. A second bevel gear 17 that meshes with the first bevel gear 6 is coaxially and fixedly connected to the rotating shaft 13. The second bevel gear 17 is fixedly connected to the hinge frame 10.
[0026] The aforementioned hinge frame 10 includes a rotating sleeve 8 coaxially and fixedly connected to the rotating shaft 13 and the second bevel gear 17. A hinge plate 9 is fixedly connected to the side wall of the rotating sleeve 8, and the hinge plate 9 is hinged to the push rod 14. In order to make the structure of the hinge frame 10 more stable, the rotating sleeve 8 and the hinge plate 9 are designed as an integral molding structure. The integral molding structure not only makes the structure of the hinge frame 10 more stable, but also facilitates the mass production of the hinge frame 10, which has good economic benefits.
[0027] To make the hinge between the hinge plate 9 and the push rod 14 more stable, two hinge plates 9 are provided. The two hinge plates 9 are located at the two ends of the rotating sleeve 8, and the two hinge plates 9 are parallel to each other. The hinge plate 9 closer to the second bevel gear 17 is fixedly connected to the second bevel gear 17, and the push rod 14 is located between the two hinge plates 9.
[0028] As a further illustration of this example, the second bevel gear 17 includes a flat plate portion 7 that is fixedly connected to the rotating shaft 13 on the same axis and a gear tooth portion 16 that is fixedly connected to one side of the flat plate portion 7. The side of the flat plate portion 7 near the gear tooth portion 16 is fixedly connected to the hinge frame 10, and the hinge frame 10 is located inside the gear tooth portion 16.
[0029] Since the valve core moves axially and does not tilt, but the hinge point between the push rod 14 and the hinge frame 10 is off-center, the push rod 14 tilts as it pushes the valve core axially under the influence of the hinge frame 10, while the valve core does not. Therefore, a universal joint structure is required at the connection between the push rod 14 and the valve core. In this device, the push rod 14 mainly includes a ball head for connecting to the valve core. A mounting groove is provided on the valve core, and the ball head engages with the mounting groove, allowing the push rod 14 to tilt to a certain extent. A connecting rod 12 is fixedly connected to the side of the ball head 5 furthest from the valve core. A hinge arm 11 is fixedly connected to the end of the connecting rod 12 furthest from the ball head 5. The end of the hinge arm 11 furthest from the connecting rod 12 is located between and hinged to the two hinge plates 9.
[0030] The hinge arm 11 has a block structure; specifically, the part of the hinge arm 11 near the connecting rod 12 is a cuboid block structure, and the part of the hinge arm 11 that is hinged to the hinge plate 9 is a semi-cylindrical block structure. In order to make the hinge frame 10 more stable when driving the push rod 14 to move, the two sides of the hinge arm 11 are in contact with the inner sides of the two hinge plates 9.
[0031] As a further illustration of this example, the ball head 5, connecting rod 12, and hinge arm 11 are integrally formed structures. The integrally formed design of the push rod 14 makes the structure of the push rod 14 more stable, increases the service life of the push rod 14, and also makes it easier to mass-produce the push rod 14, resulting in better economic benefits.
[0032] The operating principle of this device is as follows: When it is necessary to drive the valve core to move, the motor 15 is started. The motor 15 drives the hinge frame 10 to rotate through the first bevel gear 6 and the second bevel gear 17. By rotating the motor 15 forward or backward, the push rod 14 can push or pull the valve core to move axially, thereby realizing the switching of the valve core.
[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A directional valve electric actuator, comprising a first housing (1), characterized in that, The first housing (1) is provided with a mounting cavity (4) with an opening on one side. A motor (15) is fixedly installed at the bottom of the first housing (1). A rotating shaft (13) is rotatably installed in the mounting cavity (4). A hinge frame (10) is fixedly installed on the rotating shaft (13). A push rod (14) for driving the valve core to move axially is hinged at a position of the hinge frame (10) away from the rotating shaft (13). A transmission mechanism is provided between the output shaft of the motor (15) and the hinge frame (10). The motor (15) can drive the hinge frame (10) to rotate through the transmission mechanism.
2. The electric actuator for a directional valve according to claim 1, characterized in that, The transmission mechanism includes a first bevel gear (6) rotatably installed in the mounting cavity (4), the first bevel gear (6) being coaxially fixedly connected to the output shaft of the motor (15), and a second bevel gear (17) coaxially fixedly connected to the rotating shaft (13) and meshing with the first bevel gear (6), the second bevel gear (17) being fixedly connected to the hinge frame (10).
3. The electric actuator for a directional valve according to claim 2, characterized in that, The hinge frame (10) includes a rotating sleeve (8) that is coaxially and fixedly connected to the rotating shaft (13) and the second bevel gear (17). A hinge plate (9) is fixedly connected to the side wall of the rotating sleeve (8), and the hinge plate (9) is hinged to the push rod (14).
4. The electric actuator for a directional valve according to claim 3, characterized in that, There are two hinge plates (9). The two hinge plates (9) are located at the two ends of the rotating sleeve (8). The two hinge plates (9) are parallel to each other. The hinge plate (9) closer to the second bevel gear (17) is fixedly connected to the second bevel gear (17). The push rod (14) is located between the two hinge plates (9).
5. The electric actuator for a directional valve according to claim 4, characterized in that, The second bevel gear (17) includes a flat plate portion (7) coaxially fixedly connected to the rotating shaft (13) and a gear tooth portion (16) fixedly connected to one side of the flat plate portion (7). The side of the flat plate portion (7) near the gear tooth portion (16) is fixedly connected to the hinge frame (10), and the hinge frame (10) is located inside the gear tooth portion (16).
6. The electric actuator for a directional valve according to claim 3, characterized in that, The hinge plate (9) and the rotating sleeve (8) are integrally formed.
7. The electric actuator for a directional valve according to claim 4, characterized in that, The push rod (14) includes a hinge arm (11) with one end hinged to the hinge frame (10), and a connecting rod (12) fixedly connected to the other end of the hinge arm (11). A ball head (5) for connecting to the valve core is fixedly connected to the end of the connecting rod (12) away from the hinge arm (11).
8. The electric actuator for a directional valve according to claim 7, characterized in that, The hinge arm (11) is a block structure, and the two sides of the hinge arm (11) are attached to the two hinge plates (9).
9. The electric actuator for a directional valve according to claim 7, characterized in that, The ball head (5), connecting rod (12), and hinge arm (11) are integrally formed structures.
10. The electric actuator for a directional valve according to claim 1, characterized in that, The first housing (1) extends upward and downward on the side near the opening of the mounting cavity (4) to form a mounting plate (3).