Composite load simulation system of actuator

Abstract

The invention provides a composite load simulation system of an actuator, which relates to the technical field of aircraft part test equipment and comprises a rack, a radial loading unit and an axial loading unit. An actuator fixing part and a sliding seat are arranged on the rack; the radial loading unit is used for applying radial loading force to the output shaft; the axial loading unit comprises a second linear power output unit and a force transmission unit; the telescopic end of the second linear power output unit is connected with the sliding seat so as to push the sliding seat to slide; the force transmission unit comprises a force sensor arranged on the sliding seat, a first supporting piece or a first rolling piece connected with the force sensor, and a first rolling piece or a first supporting piece correspondingly arranged on an output shaft of the linear actuator, and the first rolling piece abuts against the first supporting piece and can roll in the radial direction of the output shaft relative to the first supporting piece. The composite load simulation system of the actuator can prevent the coupling of the radial loading force and the axial loading force from influencing the test precision.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft parts testing equipment, and in particular to a composite load simulation system for an actuator. Background Art

[0002] Actuators are actuators used in aircraft and can be categorized into linear and rotary actuators based on their motion. The Linear Actuator Composite Load Simulation System is primarily used for functional testing of linear actuators. It simulates the various forces and moments to which the actuator is subjected during actual operation to verify its structural strength, control system performance, and reliability.

[0003] Existing load simulation systems mainly simulate the actual working conditions of linear actuators by directly applying loading forces in the axial and radial directions of the linear actuators. However, when radial load is applied to the linear actuator, it will be coupled with the axial load. Specifically, when the output shaft of the linear actuator is subjected to radial load, the output shaft will have a certain radial deformation. This deformation will affect the acquisition of the force sensor used to measure the axial loading force, resulting in a decrease in the loading accuracy of the axial load and a reduction in the restoration of the simulated load. Summary of the Invention

[0004] To this end, the present invention proposes a composite load simulation system for an actuator, so as to at least partially avoid coupling of radial loading and axial loading to affect simulation accuracy.

[0005] The technical solutions of the present invention are as follows: A composite load simulation system for an actuator, comprising: A test bench is provided with an actuator fixing portion and a sliding seat; the actuator fixing portion is used to fix the linear actuator to be tested; the sliding seat can slide on the test bench along the axial direction of the output shaft of the linear actuator; a radial loading unit, comprising a first linear power output unit disposed on the sliding seat, wherein an output rod of the first linear power output unit is perpendicular to the output shaft and is used to apply a radial force to the output shaft; The axial loading unit includes a fixed seat, a second linear power output unit and a force transmission unit; the fixed seat is arranged on the platform, the second linear power output unit is arranged between the fixed seat and the sliding seat, and can push the sliding seat to slide; the force transmission unit includes a force sensor fixed on the sliding seat, a first support member or a first rolling member connected to the pressure-bearing part of the force sensor, and a corresponding first rolling member or first support member arranged on the output shaft, the first rolling member abuts against the first support member, and can roll relative to the first support member along the radial direction of the output shaft.

[0006] Furthermore, a second support member or a second rolling member is provided on the end of the output rod, and a second rolling member or a second support member is correspondingly provided on the output shaft; the second rolling member abuts against the second support member and can roll relative to the second support member along the axial direction of the output shaft.

[0007] Furthermore, a connecting body is fixed on the end of the output shaft, and a rotating ring is rotatably provided on the connecting body; the first rolling member is fixed on the connecting body, and the second supporting member is fixed on the rotating ring; a bracket is provided on the sliding seat, and the first linear power output unit is installed on the bracket, and the bracket is fixed at a position on the sliding seat and can rotate around the axis of the output shaft.

[0008] Furthermore, the connecting body includes a base, a connecting part and an elastic member; the base is fixed on the output shaft, the connecting part can slide on the base along the axial direction of the output shaft, the elastic member abuts between the base and the connecting part, and applies a thrust to the connecting part to move the connecting part away from the base; the rotating ring is provided on the base, and the first rolling member is fixed on the connecting part; when the axial loading unit applies an axial loading force to the output shaft, the connecting part can slide close to the base to clamp the rotating ring with the base.

[0009] Furthermore, the base is provided with a plurality of insertion holes, the connecting part is fixed with a plurality of insertion rods, the insertion rods can be slidably inserted into the insertion holes, the elastic member is a spring installed in the insertion hole, and the spring abuts between the bottom surface of the insertion hole and the insertion rod.

[0010] Furthermore, two elongated holes are provided on the sliding seat, the center lines of the two elongated holes are arc-shaped, and the center of the center lines is located on the axis of the output shaft; corresponding to each of the elongated holes, at least one screw is fixed on the bracket, and the screw can pass through the corresponding elongated hole and be screwed to the nut to fix the bracket on the sliding seat.

[0011] Furthermore, the first support member is connected to the input end of the force sensor, and a through hole is constructed on the first support member, the length direction of which is perpendicular to the axial direction of the output shaft, and a through hole is constructed on the side wall of the through hole close to the linear actuator; a connecting rod is provided on the output shaft and can be inserted into the through hole through the through hole, and the first rolling member is rotatably provided on the end of the connecting rod.

[0012] Furthermore, the stand is fixedly provided with two guide rails which are parallel and spaced apart, and the sliding seat is fixedly provided with a slider which can slide correspondingly on the two guide rails.

[0013] Furthermore, it also includes a displacement sensor provided on the stand and located on one side of the sliding seat, and the sliding seat is connected to the signal input end of the displacement sensor.

[0014] The working principle and beneficial effects of the present invention are: The composite load simulation system of the actuator provided by the present invention is achieved by arranging a first support member or a first rolling member at the input end of the force sensor and correspondingly arranging a first rolling member or a first support member on the output shaft, wherein the first rolling member abuts against the first support member and can roll radially along the output shaft relative to the first support member; when a radial load is applied to the output shaft, the first rolling member can slide relative to the first support member, thereby avoiding affecting the accuracy of axial loading due to deformation of the output shaft along its radial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 A three-dimensional diagram of a composite load simulation system for an actuator provided by an embodiment of the present invention; Figure 2 A three-dimensional diagram of the composite load simulation system of the actuator provided by an embodiment of the present invention from another angle; Figure 3 for Figure 1 A partial enlarged view of point A in the middle; Figure 4 An exploded view of a connection body provided in an embodiment of the present invention; Figure 5 An exploded view of the connecting body from another angle provided by an embodiment of the present invention; Figure 6 An exploded view of the cooperation between the bracket and the sliding seat provided in an embodiment of the present invention; In the figure: 100, stand; 110, actuator fixing part; 120, sliding seat; 121, bracket; 122, screw; 130, guide rail; 200, radial loading unit; 210, first linear power output unit; 211, tension and pressure sensor; 212, output rod; 213, second rolling element; 214, second support member; 201, long hole; 300, axial loading unit; 310, fixed seat; 320, second linear power output unit; 330, force transmission unit; 331, force sensor; 332, first support member; 333, first rolling element; 400, linear actuator; 401, insertion hole; 410, output shaft; 420, connecting body; 421, base; 422, connecting part; 423, insertion rod; 424, elastic member; 430, rotating ring; 500, displacement sensor. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] This embodiment provides a composite load simulation system for an actuator, which will be referred to as a load simulation system in the following text. Figure 1 and Figure 2 As shown, the load simulation system includes a test stand 100, a radial loading unit 200, and an axial loading unit 300. An actuator fixing portion 110 and a sliding seat 120 are provided on the test stand 100. The actuator fixing portion 110 is used to fix the linear actuator 400 to be tested. The sliding seat 120 is provided on the test stand 100 in a guideable and slidable manner, and the sliding direction of the sliding seat 120 is parallel to the axial direction of the output shaft 410 of the linear actuator 400.

[0019] refer to Figure 1 As shown, the radial loading unit 200 includes a first linear power output unit 210 arranged on the sliding seat 120, and the output rod 212 of the first linear power output unit 210 is perpendicular to the output shaft 410 of the linear actuator 400. The first linear power output unit 210 is used to apply a loading force to the output shaft 410 along the radial direction of the output shaft 410.

[0020] refer to Figures 1 to 3 As shown, the axial loading unit 300 includes a fixed seat 310, a second linear power output unit 320 and a force transmission unit 330; the fixed seat 310 is fixed on the platform 100, the telescopic end of the second linear power output unit 320 is connected to the sliding seat 120, and the other end is connected to the fixed seat 310, and can push the sliding seat 120 to slide.

[0021] The force transmission unit 330 includes a force sensor 331 fixed on the sliding seat 120, a first support member 332 or a first rolling member 333 connected to the pressure-bearing part of the force sensor 331, and a corresponding first rolling member 333 or a first support member 332 provided on the output shaft 410. The first rolling member 333 abuts against the first support member 332 and can roll radially along the output shaft 410 relative to the first support member 332.

[0022] Based on the above structure, when the load simulation system of this embodiment is in use, the second linear power output unit 320 can push the sliding seat 120 to apply an axial load to the output shaft 410. Furthermore, the first linear power output unit 210 can push the output shaft 410 radially to apply a radial load to the output shaft 410, thereby completing load simulation on the linear actuator 400. Furthermore, in the load simulation system of this embodiment, when the radial load is applied to the output shaft 410, the deformation of the output shaft 410 caused by the radial load will cause the first rolling member 333 to slide radially relative to the first support member 332 along the output shaft 410, thereby preventing the measurement results of the force sensor 331 from being affected and thus preventing the test accuracy from being affected.

[0023] For specific structure, refer to Figure 1 and Figure 2 As shown, the platform 100 of this embodiment is a foundation for mounting other components, which can be configured as needed and will not be described in detail here. The actuator fixing portion 110 of this embodiment includes a base fixedly mounted on the platform 100, and the linear actuator 400 to be tested is fixed on the base.

[0024] refer to Figure 1 and Figure 2 As shown, in this embodiment, two parallel and spaced guide rails 130 are fixed to the stage 100. The two guide rails 130 are located on either side of the base, and the length direction of the two guide rails 130 is parallel to the axial direction of the output shaft 410 of the linear actuator 400. Slide blocks are fixed to the sliding seat 120, each of which can slide on the two guide rails 130. In other words, in this embodiment, the cooperation between the guide rails 130 and the slide blocks guides the sliding of the sliding seat 120 on the stage, thereby enabling the sliding seat 120 to slide on the stage 100 along the axial direction of the output shaft 410.

[0025] In some embodiments, two guide rods may be fixedly provided on the platform 100 , and linear bearings slidably mounted on the guide rods may be fixed on the sliding seat 120 to guide the sliding of the sliding seat 120 .

[0026] In this embodiment, the first linear power output unit 210 is a voice coil motor mounted on the sliding base 120. The voice coil motor can be an existing product, and its structure and operating principle are not described in detail here. In some embodiments, the first linear power output unit 210 can also be a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic cylinder.

[0027] refer to Figure 1 and Figure 3As shown, in this embodiment, a tension and pressure sensor 211 is provided at the telescopic end of the voice coil motor, and the aforementioned output rod 212 is connected to the pressure-bearing portion of the tension and pressure sensor 211. A second rolling element 213 is provided at the end of the output rod 212, and a second support member 214 is fixed to the output shaft 410 of the linear actuator 400. The second rolling element 213 abuts the second support member 214 and can roll relative to the second support member 214 along the axial direction of the output shaft 410.

[0028] A specific structure of the second support member 214 can be referred to Figure 3 As shown, the second support member 214 is rectangular in shape and has an elongated through-hole formed therein, with the length of the through-hole parallel to the axial direction of the output shaft 410. A through-hole is formed on the side wall of the through-hole away from the output shaft 410, through which the end of the output rod 212 away from the tension and pressure sensor 211 is inserted. The second rolling member 213 is rotatably mounted on the end of the output rod 212 located within the through-hole.

[0029] By providing the second support member 214 and the second rolling member 213, the first linear power output unit 210 can apply only radial loading force to the output shaft 410. Specifically, if the output rod 212 is fixedly connected or hinged to the output shaft 410, it is difficult to make the output rod 212 perpendicular to the output shaft 410 because the connection point between the output rod 212 and the output shaft 410 is fixed. If the output rod 212 is not perpendicular to the output shaft 410, the output rod 212 will apply an axial force component to the output shaft 410, affecting the test results. However, by providing the second support member 214 and the second rolling member 213, because the connection point between the output rod 212 and the output shaft 410 is not fixed, it is easier to make the output rod 212 perpendicular to the output shaft 410. This allows the output rod 212 to apply only radial loading force to the output shaft 410, thus avoiding affecting the test results.

[0030] In some embodiments, the second rolling member 213 may be disposed on the output shaft 410 , and the second supporting member 214 may be disposed on the output rod 212 ; the principles are the same and will not be described in detail herein.

[0031] refer to Figure 1 and Figure 2 As shown, the fixed seat 310 is located on the other side of the sliding seat 120 relative to the side with the base. In this embodiment, the second linear power output unit 320 is an electric telescopic cylinder. One end of the electric telescopic cylinder is hinged to the fixed seat 310, and its telescopic end is hinged to the sliding seat 120. The telescopic end of the electric telescopic cylinder can drive the sliding seat 120 to apply an axial load force to the output shaft 410. In some embodiments, the second linear power output unit 320 can also be a pneumatic cylinder or a hydraulic cylinder.

[0032] refer to Figure 1 and Figure 2 As shown, the force sensor 331 is fixed to the sliding seat 120, and the first support member 332 is connected to the input end of the force sensor 331. A first rolling member 333 is fixed to the output shaft 410 of the linear actuator 400. The first rolling member 333 abuts the first support member 332 and can slide relative to the first support member 332 along the radial direction of the output shaft 410. It should be noted that the first rolling member 333 and the second rolling member 213 have the same structure, and the first support member 332 and the second support member 214 have the same structure and operating principle, differing only in the installation direction, and will not be further described here.

[0033] In this embodiment, by providing a first rolling member 333 and a first support member 332, when the first linear power unit applies a radial load to the output shaft 410, the deformation of the output shaft 410 causes the first rolling member 333 to slide relative to the first support member 332, so that the first support member 332 is only subjected to the force along the axial direction of the output shaft 410, resulting in more accurate measurement results from the force sensor 331. Compared to the solution of this embodiment, if the output shaft 410 is fixedly connected to the input end of the force sensor 331, radial deformation of the output shaft 410 will also affect the detection results of the force sensor 331, distorting the data measured by the force sensor 331 and affecting test accuracy.

[0034] In some embodiments, the first rolling member 333 may be connected to the input end of the force sensor 331, and the first supporting member 332 may be fixedly connected to the output shaft 410. They have the same working principle and are not described in detail here.

[0035] In some embodiments, as Figure 4 、 Figure 5 and Figure 6 As shown, a connecting body 420 is fixed to the end of the output shaft 410, and a rotating ring 430 is rotatably mounted on the connecting body 420. The first rolling member 333 is fixed to the connecting body 420, and the second support member 214 is fixed to the rotating ring 430. Furthermore, a bracket 121 is provided on the sliding seat 120, and the first linear power output unit 210 is specifically fixedly mounted on this bracket 121. The bracket 121 is fixed to the sliding seat 120 so as to be rotatable about the axis of the output shaft 410.

[0036] By enabling bracket 121 to rotate about the axis of output shaft 410, and thus enabling first linear power output unit 210 to rotate about the axis of output shaft 410, radial loads in various directions can be applied to output shaft 410. For example, by enabling bracket 121 to rotate within a 180° range, in conjunction with first linear power output unit 210 applying a thrust or pull to output shaft 410, radial loads can be applied to output shaft 410 within a 360° range.

[0037] For specific structure, refer to Figure 6 As shown, two elongated holes 201 are constructed on the sliding seat 120. The centerlines of both elongated holes 201 are arc-shaped, with the centerlines located on the axis of the output shaft 410. Furthermore, a plurality of screws 122 are fixed to the bracket 121. Each screw 122 can pass through the elongated hole 201 and be screwed to a nut, thereby securing the bracket 121 to the sliding seat 120. The fixed position of the bracket 121 on the sliding seat 120 can be adjusted about the axis of the output shaft 410 by adjusting the position of the screw 122 within the elongated hole 201.

[0038] refer to Figure 4 and Figure 6 As shown, the connecting body 420 of this embodiment includes a base 421, a connecting portion 422 and an elastic member 424. The base 421 is fixed on the output shaft 410, and a plurality of insertion holes 401 are provided on the base 421, the axial direction of which is parallel to the axial direction of the output shaft 410. The connecting portion 422 is provided with an insertion rod 423 that can slide in each insertion hole 401. The sliding of the insertion rod 423 in the insertion hole 401 enables the connecting portion 422 to slide on the base 421 along the axial direction of the output shaft 410. The elastic member 424 is installed in the insertion hole 401 to apply a thrust to the connecting portion 422 to move the connecting portion 422 away from the base 421. The aforementioned rotating ring 430 is specifically rotatably provided on the base 421, while the first rolling member 333 is fixedly provided on the connecting portion 422.

[0039] Based on the above structure, when the axial loading unit 300 applies an axial loading force to the output shaft 410 via the first rolling element 333, it first pushes the connecting portion 422 to compress the elastic element 424, causing the connecting portion 422 to approach the base 421. This causes the connecting portion 422 and the base 421 to clamp the rotating ring 430, restricting the rotation of the rotating ring 430 and preventing unexpected rotation of the rotating ring 430. Specifically, by providing the rotating ring 430, when the position of the bracket 121, i.e., the first linear power output unit 210, needs to be adjusted, the first support member 332 on the rotating ring 430 can rotate with the bracket 121, thereby conveniently adjusting the position of the bracket 121, i.e., the first linear power output unit 210. After the position of the bracket 121 is adjusted, if the rotating ring 430 is not fixed, if the force applied to the first support member 332 by the first linear power output unit 210 is unbalanced, the first support member 332 will drive the rotating ring 430 to rotate, affecting the radial loading force applied to the output shaft 410.

[0040] By providing the above-mentioned base 421 and connecting portion 422, when conducting a test load test, after the bracket 121 is adjusted to a suitable position, the axial loading unit 300 can first apply an axial loading force to the output shaft 410 of the linear actuator 400 while fixing the rotating ring 430. Thereafter, the radial loading unit 200 can apply a radial loading force to the output shaft 410 without being affected by the rotation of the rotating ring 430.

[0041] refer to Figure 2 As shown, the load simulation system of this embodiment further includes a displacement sensor 500 provided on the platform 100 and located on one side of the sliding seat 120 . The sliding seat 120 is connected to a signal input end of the displacement sensor 500 so that the displacement of the sliding seat 120 is measured by the displacement sensor 500 .

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A composite load simulation system for an actuator, characterized in that: include: A stand (100), wherein an actuator fixing portion (110) and a sliding seat (120) are provided on the stand (100); the actuator fixing portion (110) is used to fix the linear actuator (400) to be tested; and the sliding seat (120) is capable of sliding on the stand (100) along the axial direction of the output shaft (410) of the linear actuator (400); A radial loading unit (200) comprises a first linear power output unit (210) provided on the sliding seat (120), wherein an output rod (212) of the first linear power output unit (210) is perpendicular to the output shaft (410) and is used to apply a radial force to the output shaft (410); The axial loading unit (300) comprises a fixed seat (310), a second linear power output unit (320) and a force transmission unit (330); the fixed seat (310) is arranged on the platform (100), the second linear power output unit (320) is arranged between the fixed seat (310) and the sliding seat (120), and is capable of pushing the sliding seat (120) to slide; the force transmission unit (330) comprises a force sensor (331) fixed on the sliding seat (120), a first support member (332) or a first rolling member (333) connected to the pressure-bearing portion of the force sensor (331), and a corresponding first rolling member (333) or a first support member (332) arranged on the output shaft (410), the first rolling member (333) abutting against the first support member (332) and being capable of rolling relative to the first support member (332) along the radial direction of the output shaft (410).

2. The composite load simulation system for an actuator according to claim 1, characterized in that: A second support member (214) or a second rolling member (213) is provided on the end of the output rod (212), and a second rolling member (213) or a second support member (214) is correspondingly provided on the output shaft (410); the second rolling member (213) abuts against the second support member (214) and is capable of rolling relative to the second support member (214) along the axial direction of the output shaft (410).

3. The composite load simulation system for an actuator according to claim 2, characterized in that: A connecting body (420) is fixedly provided on the end of the output shaft (410), and a rotating ring (430) is rotatably provided on the connecting body (420); the first rolling member (333) is fixedly provided on the connecting body (420), and the second supporting member (214) is fixedly provided on the rotating ring (430); a bracket (121) is provided on the sliding seat (120), the first linear power output unit (210) is mounted on the bracket (121), and the bracket (121) is able to rotate around the axis of the output shaft (410) at a fixed position on the sliding seat (120).

4. The composite load simulation system for an actuator according to claim 3, characterized in that: The connecting body (420) includes a base (421), a connecting portion (422) and an elastic member (424); the base (421) is fixed on the output shaft (410), the connecting portion (422) can slide on the base (421) along the axial direction of the output shaft (410), and the elastic member (424) abuts between the base (421) and the connecting portion (422) and applies a force to the connecting portion (422) to make the connecting portion (422) The connecting portion (422) is pushed away from the base (421); the rotating ring (430) is provided on the base (421), and the first rolling element (333) is fixed on the connecting portion (422); when the axial loading unit (300) applies an axial loading force to the output shaft (410), the connecting portion (422) can slide close to the base (421) to clamp the rotating ring (430) with the base (421).

5. The composite load simulation system for an actuator according to claim 4, characterized in that: The base (421) is provided with a plurality of insertion holes (401), the connecting portion (422) is fixedly provided with a plurality of insertion rods (423), the insertion rods (423) are slidably inserted into the insertion holes (401), and the elastic member (424) is a spring installed in the insertion hole (401), and the spring abuts between the bottom surface of the insertion hole (401) and the insertion rods (423).

6. The composite load simulation system for an actuator according to claim 3, characterized in that: The sliding seat (120) is provided with two elongated holes (201), the center lines of the two elongated holes (201) are arc-shaped, and the centers of the center lines are located on the axis of the output shaft (410); corresponding to each elongated hole (201), at least one screw rod (122) is fixedly provided on the bracket (121), and the screw rod (122) can pass through the corresponding elongated hole (201) and be screwed to a nut to fix the bracket (121) on the sliding seat (120).

7. The composite load simulation system for an actuator according to claim 1, characterized in that: The first support member (332) is connected to the input end of the force sensor (331), and the first support member (332) is provided with a through hole whose length direction is perpendicular to the axial direction of the output shaft (410), and the through hole is provided with a through hole on the side wall close to the linear actuator (400); the output shaft (410) is provided with a connecting rod capable of being inserted into the through hole through the through hole, and the first rolling member (333) is rotatably provided on the end of the connecting rod.

8. The composite load simulation system for an actuator according to claim 1, characterized in that: Two parallel and spaced guide rails (130) are fixedly provided on the platform (100), and a sliding block capable of correspondingly sliding on the two guide rails (130) is fixedly provided on the sliding seat (120).

9. The composite load simulation system for an actuator according to claim 1, characterized in that: It also includes a displacement sensor provided on the platform (100) and located on one side of the sliding seat (120), and the sliding seat (120) is connected to a signal input end of the displacement sensor.

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