Series actuator cylinder movement anti-rotation mechanism
By setting a combination structure of sensor connection bracket, anti-torsion link and sliding bushing on the series actuator, the problem of linear displacement sensor torsion caused by piston rod rotation is solved, realizing the linear motion of piston rod and improving the reliability and safety of actuator.
Patent Information
- Application Number
- CN202423172473.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In the prior art, the piston rod of the series actuator is prone to circumferential rotation under hydraulic pressure, which causes the linear displacement sensor installed on the outside of the piston rod to twist and deform, potentially leading to malfunction and affecting the reliability and safety of the aircraft.
Design a series actuator motion anti-rotation mechanism, including a sensor connection bracket, an anti-torsion linkage and a sliding bushing. Through structural design, prevent the piston rod from rotating circumferentially, ensuring that the linear displacement sensor does not rotate with the piston rod.
This effectively prevents the piston rod from rotating circumferentially, ensuring the stability of the linear displacement sensor and improving the reliability and safety of the actuator.
Smart Images
Figure CN223621913U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to aviation hydraulic actuation technology, specifically relating to a tandem actuator cylinder motion anti-rotation mechanism. Background Technology
[0002] Hydraulic actuators are an important component of flight control systems, and their reliability and safety level directly determine the reliability and safety of the aircraft.
[0003] For actuators with two hydraulic systems connected in series, the piston rod undergoes slight circumferential rotation under hydraulic pressure during normal operation. To prevent the linear displacement sensor mounted on the actuator from rotating with the piston rod, for structures where the sensor is installed inside the piston rod, a bearing can be installed between the sensor and the piston rod to ensure that the sensor does not rotate with the piston rod. However, for some servo motors, there is not enough space inside the piston rod to install the sensor.
[0004] If the sensor is installed on the outside of the piston rod, the sensor may malfunction due to torsion deformation caused by the rotation of the piston rod. Therefore, it is urgent to prevent the piston rod from rotating through structural design, so as to ensure that the linear displacement sensor does not twist. Utility Model Content
[0005] The purpose of this invention is to solve the problem of the linear displacement sensor of the series actuator rotating with the piston rod. This invention proposes a mechanism to prevent rotation of the series actuator, which ensures that the piston rod does not rotate, thereby ensuring that the linear displacement sensor does not rotate.
[0006] This utility model provides a series actuator anti-rotation mechanism, which is installed on the series actuator. The series actuator anti-rotation mechanism includes: a sensor connecting bracket 1, an anti-torsion connecting rod 3, and a sliding bushing 4.
[0007] The sensor connection bracket 1 is fan-shaped, with a piston rod mounting threaded hole 11 at the center, a sensor mounting threaded hole 8 at the arc edge, and a first anti-torsion connecting rod mounting through hole 9 and two anti-torsion connecting rod mounting threaded holes 10 on the side.
[0008] Piston rod 2 is threaded into threaded hole 11;
[0009] The linear displacement sensor coil 6 is fixedly connected to the cylinder 5, and the linear displacement sensor core 7 is threadedly connected to the sensor mounting threaded hole 8.
[0010] One end of the anti-torsion link 3 is rod-shaped, and the other end is provided with a connecting plate. The connecting plate is provided with two second anti-torsion link mounting through holes 12.
[0011] The rod-shaped end of the anti-torsion link 3 passes through the first anti-torsion link mounting through hole 9, and two screws pass through the two anti-torsion link mounting threaded holes 10 and the two second anti-torsion link mounting through holes 12 to connect the anti-torsion link 3 and the sensor connecting bracket 1, so that the anti-torsion link 3 moves linearly with the piston rod 2.
[0012] The sliding bushing 4 is interference-fitted into the mounting hole on the cylinder 5, and the anti-torsion connecting rod 3 passes through the sliding bushing 4 and moves in the sliding inner hole 13 of the sliding bushing 4.
[0013] Optionally, the outer diameter of the anti-torsion connecting rod 3 and the diameter of the sliding inner hole 13 on the sliding bushing 4 are clearance fit.
[0014] Optionally, the inner ring of the sliding bushing 4 is provided with a lubricating oil groove 14;
[0015] The lubricating oil tank 14 is filled with lubricating oil.
[0016] Optionally, the linear displacement sensor coil 6 is fixedly connected to the cylinder 5 via an intermediate bushing structure.
[0017] Optionally, the sensor connection bracket 1 is a fan-shaped frame structure.
[0018] Optionally, the number of linear displacement sensor coil 6, linear displacement sensor core 7, and sensor mounting threaded holes 8 is three.
[0019] This invention proposes for the first time a series actuator cylinder motion anti-rotation mechanism. This structure can ensure that the piston rod will not rotate circumferentially under the action of oil pressure, thereby ensuring that the linear displacement sensor does not rotate, thus improving the reliability and safety of the actuator cylinder. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a series actuator anti-rotation mechanism provided in an embodiment of this application;
[0021] Figure 2 This is a schematic diagram of a sensor connection bracket structure in a series actuator anti-rotation mechanism provided in an embodiment of this application;
[0022] Figure 3 This is a schematic diagram of an anti-torsion linkage structure in a series actuator motion anti-rotation mechanism provided in an embodiment of this application;
[0023] Figure 4 A schematic diagram of a sliding bushing structure in a series actuator anti-rotation mechanism provided in this application embodiment. Figure 1 ;
[0024] Figure 5 A schematic diagram of a sliding bushing structure in a series actuator anti-rotation mechanism provided in this application embodiment. Figure 2 ;
[0025] Explanation of reference numerals in the attached figures:
[0026] 1-Sensor connection bracket;
[0027] 2-Piston rod;
[0028] 3-Anti-torsion linkage;
[0029] 4-Sliding bushing;
[0030] 5-Cylinder body;
[0031] 6-Linear displacement sensor coil;
[0032] 7-Linear displacement sensor core;
[0033] 8-Sensor mounting threaded hole;
[0034] 9- First anti-torsion linkage mounting through hole;
[0035] 10 - Anti-torsion linkage mounting threaded hole;
[0036] 11-Piston rod mounting threaded hole;
[0037] 12-Second anti-torsion linkage mounting through hole;
[0038] 13 - Inner hole of sliding bushing;
[0039] 14-Lubricating oil cavity. Detailed Implementation
[0040] 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 scope of protection of this utility model.
[0041] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and apparatus without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.
[0042] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0043] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0044] This utility model provides a series actuator anti-rotation mechanism, which is installed on the series actuator. The series actuator anti-rotation mechanism includes: a sensor connecting bracket 1, an anti-torsion connecting rod 3, and a sliding bushing 4.
[0045] The sensor connection bracket 1 is fan-shaped, with a piston rod mounting threaded hole 11 at the center, a sensor mounting threaded hole 8 at the arc edge, and a first anti-torsion connecting rod mounting through hole 9 and two anti-torsion connecting rod mounting threaded holes 10 on the side.
[0046] Piston rod 2 is threaded into threaded hole 11;
[0047] The linear displacement sensor coil 6 is fixedly connected to the cylinder 5, and the linear displacement sensor core 7 is threadedly connected to the sensor mounting threaded hole 8.
[0048] One end of the anti-torsion link 3 is rod-shaped, and the other end is provided with a connecting plate. The connecting plate is provided with two second anti-torsion link mounting through holes 12.
[0049] The rod-shaped end of the anti-torsion link 3 passes through the first anti-torsion link mounting through hole 9, and two screws pass through the two anti-torsion link mounting threaded holes 10 and the two second anti-torsion link mounting through holes 12 to connect the anti-torsion link 3 and the sensor connecting bracket 1, so that the anti-torsion link 3 moves linearly with the piston rod 2.
[0050] The sliding bushing 4 is interference-fitted into the mounting hole on the cylinder 5, and the anti-torsion connecting rod 3 passes through the sliding bushing 4 and moves in the sliding inner hole 13 of the sliding bushing 4.
[0051] The mounting threaded hole 8 on the sensor connecting bracket 1 connects the linear displacement sensor core 7 to the sensor connecting bracket 1 via a threaded connection. The anti-torsion connecting rod 3 is connected to the sensor connecting bracket 1 via a through hole 9 and a threaded hole 10. The piston rod is connected to the sensor connecting bracket 1 via a threaded hole 11.
[0052] The mounting hole 12 on the anti-torsion link 3 is connected to the sensor connection bracket 1 by screws, and the anti-torsion link 3 moves linearly with the piston 2.
[0053] The sliding bushing 4 is interference-fitted into the mounting hole on the cylinder 5, and the anti-torsion connecting rod 3 moves in the sliding inner hole 13 of the sliding bushing.
[0054] For example, the outer diameter of the anti-torsion connecting rod 3 and the diameter of the sliding inner hole 13 on the sliding bushing 4 are in clearance fit. The selected clearance must ensure that the movement between the anti-torsion connecting rod 3 and the sliding bushing 4 will not be blocked, while avoiding the presence of clearance that would cause the piston rod to rotate.
[0055] For example, the sliding bushing 4 is provided with a lubricating oil groove 14. Lubricating oil is added to the lubricating oil groove regularly. On the one hand, it can ensure the lubrication of the relative movement between the anti-torsion link 3 and the sliding bushing 4. On the other hand, it can serve as a storage space for excess material between the anti-torsion link 3 and the sliding bushing 4, so as to avoid movement jamming caused by excess material.
[0056] This utility model prevents circumferential torsion during the movement of the piston rod of the series actuator cylinder by the cooperation of parts such as the sensor connecting bracket 1, the anti-torsion connecting rod 3, and the sliding bushing 4.
[0057] The sensor connecting bracket 1 connects the piston rod 2, the linear displacement sensor core 7, and the anti-torsion connecting rod 3 into a whole, so that the linear displacement sensor core 7 and the anti-torsion connecting rod 3 can move linearly with the piston rod 2.
[0058] The sliding bushing 4 is installed on the cylinder 5. The anti-torsion connecting rod 3 moves relative to the sliding bushing 4. Through the fit gap between the anti-torsion connecting rod 3 and the sliding bushing 4, the circumferential movement of the sensor connecting bracket 1 along the central axis is restricted, thereby preventing the circumferential movement of the piston rod 2, thus achieving the purpose of preventing torsion of the series actuator cylinder movement.
[0059] Lubricating oil is periodically added to the lubrication groove 14 on the sliding bushing 4. This ensures the lubrication of the relative movement between the anti-torsion link 3 and the sliding bushing 4, and also serves as a storage space for excess material between the anti-torsion link 3 and the sliding bushing 4, preventing movement jamming caused by excess material.
[0060] The sensor connecting bracket 1, anti-torsion connecting rod 3, and sliding bushing 4 described in this utility model are installed on the actuating cylinder. The sliding bushing 4 is installed on the cylinder body 5. The linear displacement sensor coil 6 is also fixedly connected to the cylinder body 5 through the intermediate bushing structure. The sliding bushing 4, cylinder body 5, and linear displacement sensor coil 6 are the stator assembly of the actuating cylinder. The sensor connecting bracket 1 is fixedly connected to the piston rod 2, linear displacement sensor core 7, and anti-torsion connecting rod 3 through threaded connection, and is the mover assembly of the actuating cylinder.
[0061] When the actuator cylinder is working normally, the hydraulic oil pushes the piston rod to move linearly, thereby driving the sensor connecting bracket 1, the linear displacement sensor core 7, and the anti-torsion link 3 to move linearly. The relative movement points of the mover assembly and the stator assembly are located at three points, respectively between the piston rod 2 and the cylinder 5, the linear displacement sensor core 7 and the linear displacement sensor coil 6, and the anti-torsion link 3 and the sliding bushing 4. Through the clearance fit between the anti-torsion link 3 and the sliding bushing 4, the circumferential rotation of the piston rod along the central axis of the actuator cylinder is restricted, thereby achieving anti-torsion of the actuator cylinder's movement.
[0062] The above-described embodiments are merely preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the present utility model patent. It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should be included within the protection scope of the present utility model.
Claims
1. A mechanism for preventing rotation of a series-actuated cylinder, characterized in that, The anti-rotation mechanism of the series actuator cylinder is disposed on the series actuator cylinder. The anti-rotation mechanism of the series actuator cylinder includes: sensor connecting bracket (1), anti-torsion connecting rod (3) and sliding bushing (4). The sensor connection bracket (1) is fan-shaped, with a piston rod mounting threaded hole (11) at the center, a sensor mounting threaded hole (8) at the arc edge, and a first anti-torsion connecting rod mounting through hole (9) and two anti-torsion connecting rod mounting threaded holes (10) on the side. The piston rod (2) is threaded into the threaded hole (11); The coil (6) of the linear displacement sensor is fixedly connected to the cylinder (5), and the iron core (7) of the linear displacement sensor is threadedly connected to the sensor mounting threaded hole (8). One end of the anti-torsion link (3) is rod-shaped, and the other end is provided with a connecting plate. The connecting plate is provided with two second anti-torsion link mounting through holes (12). The rod-shaped end of the anti-torsion link (3) passes through the first anti-torsion link mounting through hole (9), and two screws pass through the two anti-torsion link mounting threaded holes (10) and the two second anti-torsion link mounting through holes (12) to connect the anti-torsion link (3) and the sensor connecting bracket (1), so that the anti-torsion link (3) moves linearly with the piston rod (2); The sliding bushing (4) is interference-fitted into the mounting hole on the cylinder (5), and the anti-torsion connecting rod (3) passes through the sliding bushing (4) and moves in the sliding inner hole (13) of the sliding bushing (4).
2. The anti-rotation mechanism for the series-driven actuator cylinder according to claim 1, characterized in that, The outer diameter of the anti-torsion connecting rod (3) and the diameter of the sliding inner hole 13 on the sliding bushing (4) are in clearance fit.
3. The anti-rotation mechanism for the series-driven actuator cylinder according to claim 1, characterized in that, The inner ring of the sliding bushing (4) is provided with a lubricating oil groove (14); Lubricating oil is added to the lubricating oil tank (14).
4. The anti-rotation mechanism for the series-driven actuator cylinder according to claim 1, characterized in that, The linear displacement sensor coil (6) is fixedly connected to the cylinder (5) through an intermediate bushing structure.
5. The anti-rotation mechanism for the series-driven actuator cylinder according to claim 1, characterized in that, The sensor connection bracket (1) has a fan-shaped frame structure.
6. The anti-rotation mechanism for the series-driven actuator cylinder according to claim 1, characterized in that, The linear displacement sensor coil (6), the linear displacement sensor core (7), and the sensor mounting threaded hole (8) are three in number.