High-precision displacement measuring device for double-cylinder parallel actuator cylinder

Abstract

The utility model provides a high-precision displacement measuring device for a double-cylinder parallel actuator cylinder. The high-precision displacement measuring device comprises a structure device and a measuring device, the structure device comprises a bottom plate (1), an actuating cylinder seat (2), a first debugging table shaft pin (3), an inner side rocker arm (4), a connecting rod (6), a rocker arm support (8), a second debugging table shaft pin (9) and an angular contact bearing (10). The measuring device comprises a magnetostrictive linear displacement sensor and a sensor connecting rod; the magnetostrictive linear displacement sensor is arranged on the actuator cylinder seat (2), one end of the sensor connecting rod is connected in a bearing hole of the magnetostrictive linear displacement sensor, and the other end of the sensor connecting rod is connected with the second debugging table shaft pin (9) and moves along with the second debugging table shaft pin (9). The magnetostriction linear displacement sensor determines the displacement of the double-cylinder parallel actuator cylinder by measuring the displacement of the sensor connecting rod in the bearing hole.

Description

Technical Field

[0001] This utility model belongs to the field of actuator testing technology, and relates to a high-precision displacement measuring device for a dual-cylinder parallel actuator. Background Technology

[0002] Dual-cylinder parallel actuators are widely used in servo actuator technology. Their main feature is that two sets of cylinders are connected in parallel, simultaneously driving the control surface, greatly improving work efficiency. However, because dual-cylinder parallel actuators consist of two sets of cylinders and four single pistons, force conflict is prone to occur when they are used synchronously. Force conflict arises from the accumulation of errors during actuator manufacturing and assembly, or from inconsistent outputs of different actuators due to long-term wear, causing the two actuators to interfere with each other and create conflict.

[0003] The cumulative force conflicts between actuators can cause fatigue or damage to local structures of aircraft control surfaces. Therefore, the hydraulic field urgently needs a fixture suitable for high-precision displacement measurement of parallel twin-cylinder actuators, capable of accurately simulating and measuring the displacement of parallel twin-cylinder actuators on the aircraft.

[0004] Currently, directly using a measuring fixture for a single-cylinder actuator to measure the displacement accuracy of each cylinder in a double-cylinder parallel actuator does not actually reflect the actual output displacement of the double-cylinder parallel actuator, nor can it reflect the force conflict issues that exist in the double-cylinder parallel actuator. Utility Model Content

[0005] This invention provides a high-precision displacement measuring device for a dual-cylinder parallel actuator. By simulating a real connection on a machine, it measures the displacement of the dual-cylinder parallel actuator on the machine, solving the problem that existing measuring fixtures cannot actually measure the displacement of the dual-cylinder parallel actuator.

[0006] This utility model provides a high-precision displacement measuring device for a dual-cylinder parallel actuator, comprising: a structural device and a measuring device; wherein...

[0007] The structural device includes: a base plate 1, an actuator cylinder seat 2, a first test bench pin 3, an inner rocker arm 4, a connecting rod 6, a rocker arm support 8, a second test bench pin 9, and an angular contact bearing 10.

[0008] The measuring device includes a magnetostrictive linear displacement sensor and a sensor linkage;

[0009] The actuator base 2 and the two rocker arm supports 8 are connected to the base plate 1 by bolts and positioning pins; the double-cylinder parallel actuator is fixed to the actuator base 2;

[0010] The two ends of the inner rocker arm 4 are rotatably connected to the two rocker arm supports 8 via angular contact bearings 10;

[0011] The inner rocker arm 4 and the first ends of the four connecting rods 6 are connected by the first adjustment table shaft pin 3 to achieve single and double ear rotation connection;

[0012] The lugs of the four pistons of the double-barrel parallel actuator are connected to the second ends of the four connecting rods 6 through the second adjustment table shaft pin 9 to achieve single and double lug rotation connection;

[0013] The magnetostrictive linear displacement sensor is mounted on the actuator cylinder base 2. One end of the sensor connecting rod is connected to the bearing hole of the magnetostrictive linear displacement sensor, and the other end is connected to the shaft pin 9 of the second debugging table. As the shaft pin 9 of the second debugging table moves, the magnetostrictive linear displacement sensor determines the displacement of the parallel actuator cylinder by measuring the displacement of the sensor connecting rod in the bearing hole.

[0014] Optionally, the number of the first test stand shaft pin 3 and the second test stand shaft pin 9 are both two;

[0015] Two connecting rods 6 are connected to each first test bench pin 3 and each second test bench pin 9.

[0016] Optionally, the two ends of the connecting rod 6 are double-ear structures, making the structure of the connecting rod 6 H-shaped.

[0017] Optionally, the inner rocker arm 4 is arranged parallel to the actuating cylinder seat 2.

[0018] Optionally, the high-precision displacement measuring device for the dual-cylinder parallel actuator also includes: a first bushing 5 and a second bushing 7;

[0019] The inner rocker arm 4 is connected to the first test bench shaft pin 3 via the first bushing 5;

[0020] The connecting rod 6 is connected to the first test bench pin 3 and the second test bench pin 9 via the second bushing 7.

[0021] Optionally, a pin hole is provided at the end of the second test stand shaft pin 9 near the magnetostrictive linear displacement sensor.

[0022] The other end of the sensor connecting rod is inserted into the pin hole and connected to the second test bench shaft pin 9.

[0023] This utility model provides a high-precision displacement measuring device for a dual-cylinder parallel actuator. By designing a debugging fixture that can simulate the connection method on a real machine, it can measure the displacement of the dual-cylinder parallel actuator under real service conditions. This is beneficial for understanding the performance data of the actuator product, thereby providing more accurate feedback on the debugging results of the dual-cylinder parallel actuator. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention 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.

[0025] Figure 1 This is a schematic diagram of the high-precision displacement measuring device for the dual-cylinder parallel actuator of the present invention.

[0026] Figure 2 This is a schematic diagram of the sensor linkage structure of the present invention;

[0027] Explanation of reference numerals in the attached figures:

[0028] Base plate-1, actuator cylinder seat-2, first test bench pin-3, inner rocker arm-4, first bushing-5, connecting rod-6, second bushing-7, rocker arm support-8, second test bench pin-9, angular contact ball bearing-10. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 This is a schematic diagram of a high-precision displacement measuring device with two parallel actuator cylinders. Figure 2 This is a schematic diagram of the sensor linkage structure. This invention provides a high-precision displacement measuring device for a dual-cylinder parallel actuator, comprising: a structural device and a measuring device; wherein,

[0034] The structural device includes: a base plate 1, an actuator cylinder seat 2, a first test bench pin 3, an inner rocker arm 4, a connecting rod 6, a rocker arm support 8, a second test bench pin 9, and an angular contact bearing 10.

[0035] The measuring device includes a magnetostrictive linear displacement sensor and a sensor linkage;

[0036] The actuator base 2 and the two rocker arm supports 8 are connected to the base plate 1 by bolts and positioning pins; the double-cylinder parallel actuator is fixed to the actuator base 2;

[0037] The two ends of the inner rocker arm 4 are rotatably connected to the two rocker arm supports 8 via angular contact bearings 10;

[0038] The inner rocker arm 4 and the first ends of the four connecting rods 6 are connected by the first adjustment table shaft pin 3 to achieve single and double ear rotation connection;

[0039] The lugs of the four pistons of the double-barrel parallel actuator are connected to the second ends of the four connecting rods 6 through the second adjustment table shaft pin 9 to achieve single and double lug rotation connection;

[0040] The magnetostrictive linear displacement sensor is mounted on the actuator cylinder base 2. One end of the sensor connecting rod is connected to the bearing hole of the magnetostrictive linear displacement sensor, and the other end is connected to the shaft pin 9 of the second debugging table. As the shaft pin 9 of the second debugging table moves, the magnetostrictive linear displacement sensor determines the displacement of the parallel actuator cylinder by measuring the displacement of the sensor connecting rod in the bearing hole.

[0041] Optionally, the number of the first test stand shaft pin 3 and the second test stand shaft pin 9 are both two;

[0042] Two connecting rods 6 are connected to each first test bench pin 3 and each second test bench pin 9.

[0043] Optionally, the two ends of the connecting rod 6 are double-ear structures, making the structure of the connecting rod 6 H-shaped.

[0044] Optionally, the inner rocker arm 4 is arranged parallel to the actuating cylinder seat 2.

[0045] Optionally, the high-precision displacement measuring device for the dual-cylinder parallel actuator also includes: a first bushing 5 and a second bushing 7;

[0046] The inner rocker arm 4 is connected to the first test bench shaft pin 3 via the first bushing 5;

[0047] The connecting rod 6 is connected to the first test bench pin 3 and the second test bench pin 9 via the second bushing 7.

[0048] Optionally, a pin hole is provided at the end of the second test stand shaft pin 9 near the magnetostrictive linear displacement sensor.

[0049] The other end of the sensor connecting rod is inserted into the pin hole and connected to the second test bench shaft pin 9.

[0050] like Figure 1 As shown, the support and base plate of the entire tooling are interference fit, effectively eliminating tooling clearance; the actuator seat is machined as a single piece, and the horizontal side-by-side placement of the actuators effectively enhances the tooling strength and torsional resistance. The double-cylinder parallel actuators are fastened to the flange face and actuator support through four bolts, spring washers, and flat washers.

[0051] like Figure 1 As shown, the entire fixture uses a linkage and rocker arm structure similar to the actual installation on the simulator. Four linkages connect the actuator piston to the rocker arm, enabling the measurement of the displacement of the dual-cylinder parallel actuator under real service conditions. Furthermore, because this fixture directly measures the center displacement of the earring, it overcomes the traditional method of indirectly measuring displacement using a grating ruler and slide plate, thus significantly reducing fixture clearances and measurement errors.

[0052] like Figure 2 As shown, the sensor connecting rod includes a connecting rod head 11 and a connecting rod post 12. The magnetostrictive linear displacement sensor is mounted on the actuating cylinder base 2. One end of the connecting rod post 12 is connected to the bearing hole of the magnetostrictive linear displacement sensor, and the other end of the connecting rod head 11 is connected to the shaft pin 9 of the second test bench. As the shaft pin 9 of the second test bench moves, the magnetostrictive linear displacement sensor determines the displacement of the dual-cylinder parallel actuating cylinder by measuring the displacement of the sensor connecting rod in the bearing hole.

[0053] Extensive experiments have demonstrated that the dual-cylinder parallel high-precision displacement measuring fixture of this invention is not only simple in structure and easy to assemble and disassemble, but also possesses high strength and can effectively simulate the actual connection methods and stress states on an aircraft. Currently, this fixture has been applied to the debugging of multiple aircraft actuators.

[0054] 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 high-precision displacement measuring device for a double-cylinder parallel actuator, characterized in that, include: Structural devices and measuring devices; among which, The structural device includes: a base plate (1), an actuator cylinder seat (2), a first test bench pin (3), an inner rocker arm (4), a connecting rod (6), a rocker arm support (8), a second test bench pin (9), and an angular contact bearing (10). The measuring device includes a magnetostrictive linear displacement sensor and a sensor linkage; The actuator base (2) and two rocker arm supports (8) are connected to the base plate (1) by bolts and positioning pins; the double-cylinder parallel actuator is fixed on the actuator base (2); The two ends of the inner rocker arm (4) are rotatably connected to the two rocker arm supports (8) through angular contact bearings (10); The inner rocker arm (4) and the first ends of the four connecting rods (6) are connected by the first adjustment table shaft pin (3) to achieve single and double ear rotation connection; The lugs of the four pistons of the double-cylinder parallel actuator are connected to the second ends of the four connecting rods (6) through the second adjustment table shaft pin (9) to achieve single and double lug rotation connection; The magnetostrictive linear displacement sensor is installed on the actuator cylinder seat (2). One end of the sensor connecting rod is connected to the bearing hole of the magnetostrictive linear displacement sensor, and the other end is connected to the shaft pin (9) of the second debugging table. As the shaft pin (9) of the second debugging table moves, the magnetostrictive linear displacement sensor determines the displacement of the parallel actuator cylinder by measuring the displacement of the sensor connecting rod in the bearing hole.

2. The high-precision displacement measuring device for a double-cylinder parallel actuator according to claim 1, characterized in that, The number of the first test bench pin (3) and the second test bench pin (9) are both two; Two connecting rods (6) are connected to each first test bench pin (3) and each second test bench pin (9).

3. The high-precision displacement measuring device for dual-cylinder parallel actuators according to claim 1, characterized in that, The two ends of the connecting rod (6) are double-ear structures, making the structure of the connecting rod (6) H-shaped.

4. The high-precision displacement measuring device for a dual-cylinder parallel actuator according to claim 1, characterized in that, The inner rocker arm (4) is set parallel to the actuating cylinder seat (2).

5. The high-precision displacement measuring device for a double-cylinder parallel actuator according to claim 1, characterized in that, Also includes: First bushing (5) and second bushing (7); The inner rocker arm (4) is connected to the first test bench pin (3) via the first bushing (5); The connecting rod (6) is connected to the first test bench pin (3) and the second test bench pin (9) through the second bushing (7).

6. The high-precision displacement measuring device for a dual-cylinder parallel actuator according to claim 1, characterized in that, The end of the second test bench shaft pin (9) near the magnetostrictive linear displacement sensor is provided with a pin hole; The other end of the sensor connecting rod is inserted into the pin hole and connected to the second test bench shaft pin (9).

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