Oil-immersed electric mechanism

Abstract

The oil-immersed electric mechanism comprises a motor, a planetary reducer, an output shaft, a feedback assembly and a control module which are arranged in a shell assembly, and the rear end of the output shaft penetrates through the shell assembly to be connected to a cross-linking valve; the feedback assembly comprises a pin shaft and two microswitches which are arranged on a mounting plate, the mounting plate is fixedly arranged in the shell assembly, the microswitches are used for sending switching signals to the control module, the pin shaft is vertically arranged on the mounting plate, the two microswitches are symmetrically arranged on the two sides of the pin shaft, two transmission levers are rotationally arranged on the pin shaft, and the two transmission levers are arranged on the mounting plate. A spring is arranged between the front ends of the two transmission levers; the spring pushes the front ends of the two transmission levers to respectively press and touch the two microswitches; the output shaft is provided with a touch piece, and the front end of the transmission lever corresponding to the touch piece can overcome the pressure of the spring and release the microswitch by rotating the output shaft in the forward direction or the reverse direction. The device is small in size, large in torque, high in stability and capable of being soaked in oil for a long time to work.

Description

Technical Field

[0001] This invention belongs to the field of valve control technology, and specifically relates to an oil-immersed electric mechanism. Background Technology

[0002] The crosslink valve used in aircraft fuel systems connects two independent fuel tanks. Its function is to open the crosslink valve via an electric mechanism (an actuator that controls the valve's opening and closing) when the fuel pump in one tank malfunctions and fails to supply fuel. This connects the two fuel tanks, allowing for full utilization of the fuel in the tank with the faulty pump. Due to the limitations of the aircraft's unique operating environment, it must meet the performance requirements of small size, high torque, and high stability.

[0003] Currently available electric mechanisms cannot simultaneously meet the requirements of small size, high output torque, and long-term immersion in oil. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to address the shortcomings of the prior art by providing an oil-immersed electric mechanism that can operate while being immersed in oil for an extended period of time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An oil-immersed electric mechanism includes a motor, a planetary reducer, an output shaft, a feedback component, and a control module disposed within a housing assembly. The control module is used to send control signals to the motor. The motor drives the output shaft to rotate through the planetary reducer. The rear end of the output shaft passes through the housing assembly and is connected to a crosslinking valve. A seal is provided between the output shaft and the housing assembly. The feedback component includes a pin on the mounting plate and two microswitches. The mounting plate is fixedly installed inside the housing assembly. 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 arranged on both sides of the pin. Two transmission levers are rotatably mounted on the pin. A spring is installed between the front ends of the two transmission levers. The spring pushes the front ends of the two transmission levers to press and actuate the two microswitches respectively. The output shaft is equipped with a trigger that is circumferentially opposite to the rear end of the two transmission levers. Rotating the output shaft in the forward or reverse direction can cause the trigger 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 spring and release the micro switch.

[0006] To better realize the present invention, the above structure is further optimized. The trigger includes a positioning block and two positioning screws. The positioning block is fixed on the output shaft by fastening screws. Two limiting plates are symmetrically arranged on both sides of the positioning block. The two positioning screws are threadedly connected to the two limiting plates respectively. Rotating the output shaft in the forward or reverse direction can cause one of the positioning screws to press against the rear end of a transmission lever. When the output shaft continues to rotate out of control, the limiting plate can press against the mounting plate.

[0007] 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 spring are respectively set in the two mounting grooves, and the rear ends of the two transmission levers are provided with pressure blocks.

[0008] To better realize the present invention, the above structure is further optimized, with the two mounting slots positioned opposite each other and the two pressure blocks positioned opposite each other.

[0009] To better realize the present invention, the above structure is further optimized. The planetary reducer includes multiple transmission groups arranged inside the internal gear ring and driven sequentially from top to bottom. The internal gear ring is fixedly arranged inside the housing assembly. The motor drives the uppermost transmission group and the lowermost transmission group drives the output shaft to rotate.

[0010] To better realize the present invention, the above structure is further optimized. The transmission group includes a sun gear, planet gears and a planet carrier. The sun gear and the internal gear ring are meshed by several planet gears. The planet gears are rotatably connected to the planet carrier through mounting bearings. The planet carrier is fixedly connected to the sun gear of the lower transmission group. The motor drives the uppermost sun gear and the lowermost planet carrier is fixedly connected to the output shaft and drives it to rotate.

[0011] To better realize the present invention, the above structure is further optimized. The housing assembly includes an upper housing and a lower housing, which are connected by a connecting plate. A seal is also provided between the upper housing, the lower housing and the connecting plate. The motor and the control module are fixedly installed in the upper housing, and the planetary reducer, the output shaft and the feedback assembly are installed in the lower housing.

[0012] To better realize the present invention, the above structure is further optimized, and the housing assembly is made of rust-resistant material.

[0013] To better realize the present invention, the above structure is further optimized, and the output shaft is rotatably mounted in the lower housing via a support bearing.

[0014] To better realize the present invention, the above structure is further optimized, and the control module is a circuit control board.

[0015] Compared with the prior art, the present invention has the following advantages: The oil-immersed electric mechanism provided by this invention utilizes the small size and high reduction ratio of a planetary reducer to provide greater torque to the output shaft. Simultaneously, it achieves mechanical linkage control through the design of a structurally stable actuator and feedback component. Furthermore, because a spring is installed between the two transmission levers to achieve linkage, when the front end of one transmission lever overcomes the spring pressure and releases the microswitch, the other transmission lever will be subjected to greater pressure to prevent loosening due to long-term use. This ensures that the switching signal of the microswitch can be accurately sent to the control module, guaranteeing stable transmission and accurate signal delivery even in harsh working environments. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the external structure of the oil-immersed electric mechanism of the present invention; Figure 2 This is one of the internal structural schematic diagrams of the oil-immersed electric mechanism of the present invention; Figure 3 This is the second schematic diagram of the internal structure of the oil-immersed electric mechanism of the present invention; Figure 4 This is a schematic diagram of the interaction between the trigger and the feedback component in this invention; Figure 5 This is a schematic diagram of the structure of the trigger element in this invention; Figure 6 This is one of the structural schematic diagrams of the feedback component in this invention; Figure 7 This is the second schematic diagram of the feedback component in this invention; Figure 8 This is a schematic diagram of the internal connection structure of the planetary reducer in this invention.

[0018] In the picture: 1-Housing assembly, 101-Upper housing, 102-Lower housing, 103-Connecting plate, 2-Motor, 3-Planetary reducer, 301-Internal gear ring, 302-Sun gear, 303-Planet gear, 304-Planet carrier, 305-Mounting bearing, 4-Output shaft, 401-Support bearing, 5-Feedback assembly, 501-Mounting plate, 502-Pin shaft, 503-Micro switch, 504-Transmission lever, 5041-Mounting groove, 5042-Pressure block, 505-Spring, 6-Control module, 7-Seal, 8-Actuator, 801-Positioning block, 8011-Fixing hole, 8012-Limiting plate, 802-Positioning screw. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Please refer to Figures 1-8The oil-immersed electric mechanism provided by this invention includes a housing assembly 1, a motor 2, a planetary reducer 3, an output shaft 4, a feedback assembly 5, and a control module 6. The housing assembly 1 is made of rust-resistant material and includes an upper housing 101 and a lower housing 102, which are connected by a connecting plate 103. A sealing element 7 is provided between the upper housing 101, the lower housing 102, and the connecting plate 103. The motor 2 and the control module 6 are fixedly installed inside the upper housing 101. The control module 6 is a circuit control board. The control module 6 sends control signals to the motor 2 to control its forward and reverse rotation. The motor 2 drives the output shaft 4 to rotate through the planetary reducer 3, thus transmitting high torque from the output shaft 4.

[0023] like Figure 3 and Figure 8 As shown, the planetary reducer 3 includes multiple transmission groups arranged inside the internal gear ring 301, which drive sequentially from top to bottom, reducing speed layer by layer from top to bottom. The internal gear ring 301 is fixedly mounted inside the housing assembly 1 by a pin on its outer circumference. The motor 2 drives the uppermost transmission group, and the lowermost transmission group drives the output shaft 4 to rotate. The multi-stage planetary gear transmission group can increase the reduction ratio and improve the output torque. At the same time, the planetary reducer has a compact structure, which has the characteristics of stable transmission, high space utilization, small volume, large multi-stage series transmission ratio, simplified structure with fewer types of parts, and high power split transmission efficiency. It can output sufficient torque in a limited space. The transmission assembly includes a sun gear 302, planet gears 303, and a planet carrier 304. The sun gear 302 and the internal gear ring 301 are meshed through three planet gears 303. Each planet gear 303 is rotatably connected to the planet carrier 304 through a mounting bearing 305. The planet carrier 304 is fixedly connected to the sun gear 302 of the lower transmission assembly. The motor 2 drives the uppermost sun gear 302 and then drives it downwards in sequence. The lowermost planet carrier 304 is fixedly connected to the output shaft 4 and drives it to rotate.

[0024] The planetary reducer 3, output shaft 4, and feedback assembly 5 are housed within the lower housing 102. The output shaft 4 is rotatably mounted within the lower housing 102 via a support bearing 401, allowing for smooth power transmission. The rear end of the output shaft 4 passes through the lower housing 102 and connects to a cross-linking valve for controlling its opening and closing. A seal 7 is also provided between the output shaft 4 and the lower housing 102. The seal 7 can be a sealing ring, gasket, or other sealing method. Since this device operates immersed in an oil tank, it is essential to ensure that the seal 7 meets all performance standards. In particular, the seal 7 between the output shaft 4 and the lower housing 102, as a moving part, requires special attention to prevent leakage. In this embodiment, two sealing rings are provided between the output shaft 4 and the lower housing 102 for a double sealing effect. Seals 7 in other locations also need to adopt appropriate sealing methods based on their specific locations. Therefore, the form of the seal 7 is not limited to these, as long as it meets the sealing performance requirements.

[0025] like Figures 2-7 As shown, the feedback component 5 includes a pin 502 and two microswitches 503 mounted on a mounting plate 501. The microswitches 503 are fixedly connected to the mounting plate 501 by pins. The mounting plate 501 is fixedly mounted inside the housing assembly 1 and serves to support the relevant components of the feedback component 5. The microswitches 503 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 avoids the situation where the output shaft 4 does not 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 502 is vertically mounted on the mounting plate 501, and the two microswitches 503 are symmetrically arranged on both sides of the pin 502. Two transmission levers 504 are rotatably mounted on the pin 502, and a spring 505 is arranged between the front ends of the two transmission levers 504. The spring 505 pushes the front ends of the two transmission levers 504 to press and actuate the two microswitches 503 respectively. The transmission levers 504 are L-shaped, with two L-shaped transmission levers 504 arranged symmetrically on the left and right. Each of the front ends of the two transmission levers 504 has a mounting groove 5041 on its opposite surface. The two ends of the spring 505 are respectively positioned within the two mounting grooves 5041, ensuring that the spring 505 maintains its position during compression and extension. Each of the rear ends of the two transmission levers 504 has a pressure block 5042 to increase the surface area, allowing for better engagement with the actuating element 8 and completing the transmission. The two mounting grooves 5041 and the two pressure blocks 5042 are positioned opposite each other. By modifying the front and rear ends of the transmission levers 504 and adding extensions, the two ends of the two transmission levers 504 are aligned, thus avoiding the impact of misalignment of the two transmission levers 504.

[0026] like Figures 2-5As shown, the output shaft 4 is equipped with an actuating element 8 that is circumferentially opposite to the rear ends of the two transmission levers 504. The output shaft 4 synchronously drives the actuating element 8 to rotate, allowing the actuating element 8 to transmit power to the rear ends of the two transmission levers 504. The actuating element 8 includes a positioning block 801 and two positioning screws 802. The positioning block 801 is fixedly connected to the output shaft 4 by fastening screws passing through the fixing holes 8011 on it, so that the positioning block 801 and the output shaft 4 rotate synchronously. Two limit plates 8012 are symmetrically arranged on both sides of the positioning block 801. Two positioning screws 802 are threadedly connected to the two limit plates 8012 respectively. Rotating the output shaft 4 in the forward or reverse direction can cause one of the positioning screws 802 to press against the rear end of a transmission lever 504, so that the front end of the transmission lever 504 corresponding to the rear end overcomes the pressure of the spring 505 and releases the micro switch 503. At the same time, the micro switch 503 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.

[0027] like Figure 2 As shown, the mounting plate 501 is provided with an abutment part opposite to the limit plate 8012. When the output shaft 4 continues to rotate out of control, the limit plate 8012 can abut against the abutment part of the mounting plate 501 to prevent the valve from rotating and not stopping after the control module 6 fails and goes out of control. In the design, the rotation angle of the limit plate 8012 is slightly larger than the rotation angle of the valve. If the valve rotates abnormally and exceeds the required range, the limit plate 8012 will abut against the mounting plate 501 to stop the valve from rotating.

[0028] When it is necessary to adjust the rotation angle of the output shaft 4, simply adjust the distance between the positioning screw 802 and the rear end of the transmission lever 504 by rotating the positioning screw 802. For example, if it is necessary to increase the rotation angle of the output shaft 4 according to the crosslinking valve, rotate the positioning screw 802 to increase the distance between the end of the positioning screw 802 and the rear end of the transmission lever 504. 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 504. Therefore, the rotation angle of the output shaft 4 also becomes larger, the time for the front end of the transmission lever 504 to release the micro switch 503 becomes longer, and the time for the control module 6 to receive the signal also becomes longer, thus lengthening the closed-loop cycle. Conversely, if it is necessary to reduce the rotation angle of the output shaft 4, simply reduce the length between the positioning screw 802 and the rear end of the transmission lever 504 to shorten the closed-loop cycle.

[0029] Working principle: When a working command is input to the control module 6, the control module 6 controls the motor 2 to start and drive the planetary reducer 3 to move. The planetary reducer 3 then transmits power to the output shaft 4. Finally, the output shaft 4 outputs a large torque to the crosslinking valve that it is paired with, controlling its action. At the same time, the positioning block 801 rotates synchronously with the output shaft 4. When the output shaft 4 rotates to the specified angle, the positioning screw 802 on the positioning block 801 pushes the rear end of a transmission lever 504, causing the front end of the transmission lever 504 to overcome the pressure of the spring 505 and release the micro switch 503 it was pressing. The micro switch 503 pops up and 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 the 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 and accurately controlling the final rotation angle of the output shaft 4.

[0030] 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 oil-immersed electric mechanism, characterized in that: The device includes a motor (2), a planetary reducer (3), an output shaft (4), a feedback component (5), and a control module (6) disposed within a housing assembly (1). The control module (6) is used to send control signals to the motor (2). The motor (2) drives the output shaft (4) to rotate through the planetary reducer (3). The rear end of the output shaft (4) passes through the housing assembly (1) and is connected to a crosslinking valve. A seal (7) is provided between the output shaft (4) and the housing assembly (1). The feedback component (5) includes a pin (502) and two microswitches (503) mounted on a mounting plate (501). The mounting plate (501) is fixedly mounted inside the housing assembly (1). The microswitches (503) are used to send switching signals to the control module (6). The pin (502) is vertically mounted on the mounting plate (501). The two microswitches (503) are symmetrically mounted on both sides of the pin (502). Two transmission levers (504) are rotatably mounted on the pin (502). A spring (505) is provided between the front ends of the two transmission levers (504). The spring (505) pushes the front ends of the two transmission levers (504) to press and activate the two microswitches (503) respectively. The output shaft (4) is provided with a trigger (8) that is opposite to the rear end of the two transmission levers (504) along the circumferential direction. Rotating the output shaft (4) in the forward or reverse direction can cause the trigger (8) to press against the rear end of one of the transmission levers (504) individually, thereby causing the front end of the corresponding transmission lever (504) to overcome the pressure of the spring (505) and release the micro switch (503).

2. The oil-immersed electric mechanism according to claim 1, characterized in that: The trigger (8) includes a positioning block (801) and two positioning screws (802). The positioning block (801) is fixed on the output shaft (4) by fastening screws. Two limiting plates (8012) are symmetrically arranged on both sides of the positioning block (801). The two positioning screws (802) are threadedly connected to the two limiting plates (8012) respectively. Rotating the output shaft (4) in the forward or reverse direction can cause one of the positioning screws (802) to press against the rear end of one of the transmission levers (504) individually. When the output shaft (4) continues to rotate out of control, the limiting plate (8012) can press against the mounting plate (501).

3. The oil-immersed electric mechanism according to claim 2, characterized in that: The transmission lever (504) is L-shaped. The front ends of the two transmission levers (504) are provided with mounting grooves (5041) on opposite surfaces. The two ends of the spring (505) are respectively set in the two mounting grooves (5041). The rear ends of the two transmission levers (504) are provided with pressure blocks (5042).

4. The oil-immersed electric mechanism according to claim 3, characterized in that: The two mounting slots (5041) are positioned opposite each other, and the two pressure blocks (5042) are positioned opposite each other.

5. The oil-immersed electric mechanism according to claim 1, characterized in that: The planetary reducer (3) includes multiple transmission groups arranged inside the internal gear ring (301) and driven sequentially from top to bottom. The internal gear ring (301) is fixedly arranged inside the housing assembly (1). The motor (2) drives the uppermost transmission group and the lowermost transmission group drives the output shaft (4) to rotate.

6. The oil-immersed electric mechanism according to claim 5, characterized in that: The transmission assembly includes a sun gear (302), planet gears (303), and a planet carrier (304). The sun gear (302) and the internal gear ring (301) are meshed by several planet gears (303). Each planet gear (303) is rotatably connected to the planet carrier (304) through a mounting bearing (305). The planet carrier (304) is fixedly connected to the sun gear (302) of the transmission assembly below. The motor (2) drives the uppermost sun gear (302), and the lowermost planet carrier (304) is fixedly connected to the output shaft (4) and drives it to rotate.

7. The oil-immersed electric mechanism according to claim 1, characterized in that: The housing assembly (1) includes an upper housing (101) and a lower housing (102). The upper housing (101) and the lower housing (102) are connected by a connecting plate (103). A sealing element (7) is also provided between the upper housing (101), the lower housing (102) and the connecting plate (103). The motor (2) and the control module (6) are fixedly installed in the upper housing (101). The planetary reducer (3), the output shaft (4) and the feedback component (5) are installed in the lower housing (102).

8. The oil-immersed electric mechanism according to claim 7, characterized in that: The housing assembly (1) is made of rust-resistant material.

9. The oil-immersed electric mechanism according to claim 7, characterized in that: The output shaft (4) is rotatably mounted in the lower housing (102) via a support bearing (401).

10. The oil-immersed electric mechanism according to claim 1, characterized in that: The control module (6) is a circuit control board.

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