A high-precision structural characteristic static parameter testing equipment

Abstract

The present invention provides a high-precision structural characteristic static parameter testing device. The device comprises an auxiliary leveling mechanism, a transmission and lifting mechanism, a center of mass testing device, a moment of inertia and product of inertia testing device, and a fixture. When using the device, the test device is first leveled, and then the structural characteristic static parameter test is performed. Next, the transmission and lifting mechanism is used to place the workbench in a center of mass testing state, thereby performing the center of mass test of the object to be tested. The transmission and lifting mechanism is then used again to place the workbench in a moment of inertia and product of inertia testing state, and the fixture is used to measure the different postures of the object to be tested, obtaining the moment of inertia of the object to be tested in different measurement postures, thereby achieving the structural characteristic static parameter test of the object to be tested. The device is easy to install, simple to operate, and has high measurement accuracy. It is suitable for high-precision testing of the structural characteristic static parameters of small unmanned aerial vehicles.

Description

Technical Field

[0001] The invention relates to the technical field of structural characteristic quantity static parameter testing, and particularly relates to high-precision structural characteristic quantity static parameter testing equipment. Background Art

[0002] Testing of static structural parameters typically involves center of mass, moment of inertia, and product of inertia. These parameters determine product performance and quality. Existing static structural parameter testing equipment is mostly designed for measuring the static structural parameters of rotating aircraft such as missiles and rockets. Few are designed for measuring the static structural parameters of non-rotating objects such as drones. Furthermore, measuring all static structural parameters on a single test device is generally impossible, and the object under test requires repeated clamping, making the operation extremely complex. Therefore, designing high-precision static structural parameter testing equipment is crucial for improving the accuracy of static structural parameter testing for drones. Summary of the Invention

[0003] The purpose of the present invention is to improve the measurement accuracy of the static parameters of structural characteristics. A high-precision structural characteristic static parameter testing device is provided. The test equipment is leveled by an auxiliary leveling mechanism, the height of the workbench is achieved by a transmission lifting mechanism, and the switching of the measurement state is achieved by cooperating with the weighing sensor pressure head. Different combinations of tooling fixtures are used to achieve measurement requirements of different measurement postures. When measuring the center of mass, first use the transmission lifting mechanism in conjunction with the weighing sensor pressure head to switch the measurement state to the center of mass measurement state, then use the horizontal fixture and the vertical fixture in conjunction to change the measurement posture of the object to be measured to achieve the measurement of the three-dimensional center of mass of the object to be measured, and use the positional relationship between the weighing sensor reading and the known weighing sensor to calculate the center of mass of the object to be measured. When measuring the moment of inertia and product of inertia, first remove the weighing sensor pressure head, use the transmission lifting mechanism to switch the measurement state to the moment of inertia and product of inertia measurement state, then use the horizontal fixture, the inclined fixture, and the vertical fixture in conjunction to achieve the measurement requirements of different measurement postures. Secondly, use the release mechanism for pre-tightening and release, record the torsion pendulum cycle, and thus achieve the measurement of the moment of inertia and product of inertia.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-precision structural characteristic static parameter testing equipment, characterized in that the equipment consists of an auxiliary leveling mechanism part, a transmission lifting mechanism part, a center of mass testing part, a moment of inertia and inertia product testing part and a fixture part, the auxiliary leveling mechanism part consists of a leveling foot, a support plate and screws, the transmission lifting mechanism part consists of a reducer, a universal joint, a transmission shaft, a screw lift, a lifting nut, a lifting frame, a workbench, a limit block, and screws and bolts, the center of mass testing part consists of a support frame, a weighing sensor pad block, a weighing sensor, a sensor pressure head, a workbench and screws, the moment of inertia and inertia product testing part consists of a release mechanism, a torsion bar fixing seat, a torsion bar, a stepped shaft, a bearing, a sleeve, an end cover, a torsion pendulum bracket, a workbench, an explosion-proof box and fixing screws.

[0005] Further, as a preference, the auxiliary leveling mechanism is composed of a leveling foot, a support plate and a screw; the leveling foot is composed of a leveling pad, a bearing, a screw and a nut; the leveling pad is provided with a groove and a through hole; the screw is provided with a rotating handle and a stepped shaft; the stepped shaft is provided with a thread; the bearing is placed inside the groove of the leveling pad and cooperates with the shoulder of the stepped shaft; the nut cooperates with the thread of the stepped shaft; the support plate is provided with a positioning hole; the leveling foot cooperates with the positioning hole of the support plate to form the auxiliary leveling mechanism.

[0006] Further, as a preference, the transmission lifting mechanism is composed of a reducer, a universal joint, a transmission shaft, a screw lift, a lifting nut, a lifting frame, a workbench, a limit block, an explosion-proof box, and screws and bolts. The reducer and the screw lift are provided with through holes at the bottom and are connected to the support plate through bolts. The reducer, the screw lift and the transmission shaft are connected through a universal joint. The lifting nut is provided with a threaded hole, the lifting frame is provided with a through hole, a guide column and a limit column, the guide column is provided with a groove, the limit column is provided with two scale lines, namely the upper scale line and the lower scale line, the lifting nut is connected to the lifting frame through a screw, the lifting nut is connected to the screw lift through a thread, the limit block is provided with a positioning hole, the explosion-proof box is provided with a positioning hole and a through hole, and is connected to the support plate and the limit block by screws respectively, the workbench is provided with a positioning hole, three special-shaped contact blocks, a torsion tentacles, and a support tentacles. The three special-shaped contact blocks, the torsion tentacles, and the support tentacles are all connected to the workbench through screws.

[0007] Further, as a preference, the center of mass test part is composed of a support frame, a weighing sensor pad, a weighing sensor, a sensor pressure head, a workbench and screws; the support frame is composed of four cylinders and a support platform; the support platform is provided with threaded holes and through holes; the upper and lower surfaces of the cylinder are provided with threaded holes, and are connected to the support plate and the support platform respectively by screws; the weighing sensor pad is provided with a through hole, and is connected to the support platform by screws; the weighing sensor is provided with a positioning hole, and is connected to the weighing sensor pad by screws; the sensor pressure head is provided with a positioning boss, a spherical groove and a steel ball; the positioning boss is matched with the positioning hole of the weighing sensor, and the steel ball is matched with the spherical groove.

[0008] Further, as a preference, the moment of inertia and product of inertia testing part is composed of a release mechanism, a torsion bar fixing seat, a torsion bar, a stepped shaft, a bearing, a sleeve, an end cover, a torsion pendulum bracket, a workbench, an explosion-proof box and fixing screws; the release mechanism is composed of a slide rail, a slider, a limiting cylinder, a connecting block, a handle, a roller, a stopper and a screw; the slide rail is provided with a through hole and a trapezoidal groove, and the slide rail is connected to the explosion-proof box by a screw; the limiting cylinder is provided with a stepped hole and the limiting cylinder is connected to the explosion-proof box by a screw; the slider is provided with a threaded hole and a trapezoidal boss and cooperates with the trapezoidal groove of the slide rail; the connecting block is provided with a stepped hole and a threaded hole, and the connecting block is connected to the slider by a screw; the handle is provided with a thread and is connected to the connecting block by a thread; the roller is connected by a bolt Connected to the connecting block, the block is L-shaped and has a through hole. It is connected to the workbench by screws. The torsion bar fixing seat is provided with a polygonal groove and a through hole, and is connected to the support plate by screws. The torsion bar is provided with polygonal bosses at both ends, and cooperates with the polygonal groove on the torsion bar fixing seat. The stepped shaft is provided with a threaded hole and a polygonal groove and cooperates with the polygonal boss on the torsion bar. The sleeve is provided with a threaded hole and is connected to the support platform by screws. The bearing is mounted on the stepped shaft and positioned by the end cover. The end cover is provided with a through hole and is connected to the sleeve by screws. The torsion pendulum bracket is provided with a stepped hole and a conical groove, and is connected to the stepped shaft by screws. The torsion pendulum bracket is coordinated with the workbench by cooperating with the torsion pendulum antenna and the conical groove.

[0009] Further, as a preference, the tooling fixture part is composed of a horizontal tooling fixture, an inclined tooling fixture, and a vertical tooling fixture. The horizontal tooling fixture, the inclined tooling fixture, and the vertical tooling fixture are all provided with through holes, and the horizontal tooling fixture, the inclined tooling fixture, and the vertical tooling fixture can be connected to the workbench respectively by screws. The horizontal tooling fixture and the vertical tooling fixture can also be connected by screws, and they can be connected to the workbench as a whole by screws. In addition, the horizontal tooling fixture and the inclined tooling fixture can also be connected by screws, and they can be connected to the workbench as a whole by screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the overall assembly of high-precision structural characteristic static parameter testing equipment

[0011] Figure 2 Schematic diagram of the internal structure assembly of the high-precision structural characteristic static parameter testing equipment

[0012] Figure 3 Schematic diagram of the center of mass test part assembly

[0013] Figure 4 Assembly diagram for moment of inertia test part

[0014] Figure 5 Assembly diagram for the release mechanism

[0015] Figure 6 Schematic diagram of the explosion of the auxiliary leveling mechanism

[0016] Figure 7 Schematic diagram of the support plate

[0017] Figure 8 Schematic diagram of the lifting frame

[0018] Figure 9 Schematic diagram of the support platform

[0019] Figure 10 Schematic diagram of explosion-proof box

[0020] Figure 11 Schematic diagram of the workbench

[0021] Figure 12 Schematic diagram of the torsion bracket

[0022] Figure 13 Schematic diagram of a torsion bar

[0023] Figure 14 Schematic diagram of the torsion bar fixing seat

[0024] Figure 15 Schematic diagram of a stepped shaft

[0025] Figure 16 Schematic diagram of the limit block

[0026] Figure 17 Schematic diagram of horizontal fixture

[0027] Figure 18 Schematic diagram of the tilting fixture

[0028] Figure 19 Schematic diagram of vertical fixture

[0029] In the figure: 1. Reducer, 2. Explosion-proof box, 2-1. Through hole for supporting plate, 2-2. Positioning hole for limit block, 2-3. Threaded hole for limit block, 2-4. Threaded hole for limiting cylinder, 2-5. Threaded hole for slide rail, 3. Limit block, 3-1. Stepped hole for explosion-proof box, 3-2. Positioning hole for limit column, 4. Workbench, 4-1. Special-shaped contact block, 4-2. Torsion and swinging feeler, 4-3. Threaded hole for fixture, 4-4. Support feeler, 5. Stopper, 6. Release mechanism, 7. Adjustment Leveling feet, 8. Support plate, 8-1. Positioning holes for leveling feet, 8-2. Four through holes for the reducer, 8-3. Threaded holes for the nuts, 8-4. Threaded holes for the explosion-proof box, 8-5. Threaded holes for the screw jack, 8-6. Threaded holes for the torsion bar holder, 8-7. Threaded holes for the cylinder, 9. Universal joint, 10. Screw jack, 11. Cylinder, 12. Torsion bar holder, 12-1. Through hole for the support plate, 12-2. Polygonal groove for the torsion bar, 13. Torsion bar, 14. End cap, 15. Sleeve, 16. Drive shaft, 17. Steel ball, 18. Weighing sensor, 19. Weighing sensor spacer, 20. Pendulum bracket, 20-1. Conical groove for cooperating with the pendulum feeler, 20-2. Stepped hole for cooperating with the stepped shaft, 21. Weighing sensor pressure head, 22. Lifting nut, 23. Lifting frame, 23-1. Limiting column, 23-2. Guide column, 23-3. Lifting nut positioning hole, 23-4. Six threaded holes for cooperating with the lifting nut, 24. Stepped shaft, 24-1. Screw for cooperating with the pendulum bracket Grooved holes, 24-2, shoulder for matching with the upper bearing, 24-3, shoulder for matching with the lower bearing, 24-4, polygonal groove for matching with the torsion bar, 25, bearing, 26, slide rail, 27, slider, 28, limiting cylinder, 29, roller, 30, handle, 31, screw, 32, nut, 33, bearing, 34, leveling pad, 35, support platform, 35-1, through hole for matching with the end cover, 35-2, stepped shaft positioning hole, 35-3, stepped hole for matching with the cylinder, 35-4, threaded hole for matching with the sensor pad. DETAILED DESCRIPTION

[0030] The present invention provides a high-precision static parameter testing device for structural characteristics. The following, in conjunction with the accompanying drawings of the embodiments of the present invention, provides a clear and complete description of the technical solutions in the embodiments of the present invention. It is apparent that the embodiments described are only a portion of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0031] The present invention mainly consists of five parts, namely an auxiliary leveling mechanism part, a transmission lifting mechanism part, a center of mass test part, a moment of inertia and product of inertia test part and a fixture part. Because the present invention is a composite structure, the installation sequence is from bottom to top. The auxiliary leveling mechanism part of the device is composed of a leveling foot (7), a support plate (8) and a screw. First, the nut (32) is positioned with the leveling foot positioning hole (8-1) on the support plate, and then the nut (32) is fixed with the threaded hole (8-3) on the support plate with a screw. Then, the screw (31) is matched with the nut (32), and the bearing (33) is installed inside the leveling pad (34) and matched with the screw (31), thereby realizing the installation work of the auxiliary leveling mechanism part of the device.

[0032] The transmission lifting mechanism is composed of a reducer (1), a universal joint (9), a transmission shaft (16), a screw lift (10), a lifting nut (22), a lifting frame (23), a workbench (4), a limit block (3), an explosion-proof box (2), and screws and bolts. First, the reducer (1) is connected to the support plate (8) through bolts, and the screw lift (10) is connected to the support plate (8) through bolts. The transmission between the two screw lifts is realized by the transmission shaft (16) using the universal joint (9). The reducer (1) and the screw lift are connected to each other. The connection between the two parts is also achieved through the universal joint (9), and then the lifting nut (22) is connected to the screw lift (10) through a thread, the lifting frame (23) is fixed to the lifting nut (22) through a screw, the explosion-proof box (2) is connected to the support plate (8) through a screw, the limit block (3) is connected to the explosion-proof box (2) through a screw, and the workbench (4) cooperates with the guide column (23-2) on the lifting frame (23) through a contact feeler (4-4), thereby achieving the installation work of the transmission lifting mechanism part of the equipment.

[0033] The centroid test part is composed of a support frame, a weighing sensor pad (19), a weighing sensor (18), a weighing sensor pressure head (21), a workbench (4) and screws. First, the cylinder (11) is connected to the threaded hole (8-7) on the support plate (8) by screws, and then the support platform (35) is connected to the cylinder (11) by screws. The weighing sensor pad (19) is connected to the support platform (35) by screws, and then the weighing sensor (18) is fixed to the weighing sensor pad (19) by screws. The weighing sensor pressure head (21) is matched with the weighing sensor (18) through the positioning hole. The steel ball (17) is located inside the weighing sensor pressure head (21) and matches with the special-shaped contact block (4-1) on the workbench (4), thereby realizing the installation work of the centroid test part of the device.

[0034] The moment of inertia and product of inertia test part is composed of a release mechanism (6), a torsion bar fixing seat (12), a torsion bar (13), a stepped shaft (24), a bearing (25), a sleeve (15), an end cover (14), a torsion pendulum bracket (20), a workbench (4), an explosion-proof box (2) and fixing screws. First, the sleeve (15) is connected to the support platform (35) by screws, and then the torsion bar fixing seat (12) is connected to the support plate (8) by screws. The torsion bar (13) is installed in the torsion bar fixing seat (12), and the bearing (25 ) is installed on the stepped shaft (24), the polygonal groove (24-4) on the stepped shaft (24) is matched with the torsion bar (13), the end cover (14) and the sleeve (15) are fixed by screws, the torsion pendulum bracket (20) is matched with the threaded hole (24-1) on the stepped shaft (24) by screws, the torsion pendulum feeler (4-2) on the workbench (4) is matched with the torsion pendulum bracket (20), and the release mechanism (6) is connected to the explosion-proof box by screws, thereby realizing the installation work of the moment of inertia and product of inertia test part of the equipment.

[0035] The fixture part consists of a horizontal fixture (36), an inclined fixture (37), and a vertical fixture (38), and is connected to the workbench through screws.

[0036] When the device is in a non-measuring state, the rotating reducer causes the workbench (4) to be in a suspended state. When performing center of mass measurement, firstly, the leveling feet (7) are used for leveling, and then the UAV is clamped on the fixture. The rotating reducer (1) causes the special-shaped contact block (4-1) on the workbench (4) to contact the steel ball (17). When performing moment of inertia and product of inertia measurement, the rotating reducer (1) causes the torsion pendulum feeler (4-2) on the workbench (4) to contact the conical groove (20-1) on the torsion pendulum bracket (20), and cooperates with the release mechanism (6) to realize the test of the static parameters of the structural characteristic quantity of the UAV.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision structural characteristic static parameter testing device, characterized by: The equipment consists of an auxiliary leveling mechanism, a transmission lifting mechanism, a center of mass test part, a moment of inertia and inertia product test part and a fixture part. The auxiliary leveling mechanism consists of a leveling foot, a support plate and screws. The transmission lifting mechanism consists of a reducer, a universal joint, a transmission shaft, a screw lift, a lifting nut, a lifting frame, a workbench and a limit block. The center of mass test part consists of a support frame, a weighing sensor pad, a weighing sensor, a weighing sensor pressure head and a workbench. The moment of inertia and inertia product test part consists of a release mechanism, a torsion bar fixing seat, a torsion bar, a stepped shaft, a bearing, a sleeve, an end cover, a torsion bar, a The support frame is composed of four cylinders and a support platform. The support platform is provided with threaded holes and through holes. The upper and lower surfaces of the cylinders are provided with threaded holes and are connected to the support plate and the support platform respectively by screws. The weighing sensor pad is provided with a through hole and is connected to the support platform by screws. The weighing sensor is provided with a positioning hole and is connected to the weighing sensor pad by screws. The weighing sensor pressure head is provided with a positioning boss, a spherical groove and a steel ball. The positioning boss is matched with the positioning hole of the weighing sensor, and the steel ball is matched with the spherical groove; the release mechanism It consists of a slide rail, a slider, a limiting cylinder, a connecting block, a handle, a roller, a stopper and a screw. The slide rail is provided with a through hole and a trapezoidal groove, and the slide rail is connected to the explosion-proof box by screws. The limiting cylinder is provided with a stepped hole and the limiting cylinder is connected to the explosion-proof box by screws. The slider is provided with a threaded hole and a trapezoidal boss and cooperates with the trapezoidal groove of the slide rail. The connecting block is provided with a stepped hole and a threaded hole. The connecting block is connected to the slider with a screw. The handle is provided with a thread and is connected to the connecting block by a thread. The roller is connected to the connecting block by a bolt. The stopper is L-shaped and provided with a through hole. It is connected to the workbench with a screw. The torsion bar fixing seat It is provided with polygonal grooves and through holes, and is connected to the support plate by screws. Polygonal bosses are provided at both ends of the torsion bar, and cooperate with the polygonal grooves on the torsion bar fixing seat. The stepped shaft is provided with threaded holes and polygonal grooves and cooperate with the polygonal bosses on the torsion bar. The sleeve is provided with threaded holes and is connected to the support platform by screws. The bearing is mounted on the stepped shaft and positioned by the end cover. The end cover is provided with a through hole and is connected to the sleeve by screws. The torsion pendulum bracket is provided with a stepped hole and a conical groove, and is connected to the stepped shaft by screws. The torsion pendulum bracket and the workbench are coordinated by the torsion pendulum feeler and the conical groove.

2. The high-precision structural characteristic static parameter testing device according to claim 1, characterized in that: The leveling foot consists of a supporting pad, a bearing, a screw and a nut. The supporting pad is provided with a groove and a through hole. The screw is provided with a rotating handle and a stepped shaft. The stepped shaft is provided with a thread. The bearing is placed inside the groove of the supporting pad and cooperates with the shoulder of the stepped shaft. The nut cooperates with the thread of the stepped shaft. The support plate is provided with a positioning hole. The leveling foot cooperates with the positioning hole of the support plate to form an auxiliary leveling part.

3. The high-precision structural characteristic static parameter testing device according to claim 1, characterized in that: The transmission lifting mechanism also includes an explosion-proof box and screws. The reducer and the bottom of the screw lift are provided with through holes and are connected to the support plate through bolts. The reducer, screw lift and transmission shaft are connected by a universal joint. The lifting nut is provided with a threaded hole, the lifting frame is provided with a through hole, a guide column and a limit column, the guide column is provided with a groove, and the limit column is provided with two scale lines, namely the upper scale line and the lower scale line. The lifting nut is connected to the lifting frame through a screw, and the lifting nut is connected to the screw lift through a thread. The limit block is provided with a positioning hole, and the explosion-proof box is provided with a positioning hole and a through hole, which are respectively connected to the support plate and the limit block by screws. The workbench is provided with a positioning hole, three special-shaped contact blocks, a torsion and swing antennae, and a support antennae. The three special-shaped contact blocks, the torsion and swing antennae, and the support antennae are all connected to the workbench by screws.

4. The high-precision structural characteristic static parameter testing device according to claim 1, characterized in that: The fixture part consists of a horizontal fixture, an inclined fixture, and a vertical fixture. The horizontal fixture, the inclined fixture, and the vertical fixture are all provided with through holes. The horizontal fixture, the inclined fixture, and the vertical fixture can be connected to the workbench respectively by screws. The horizontal fixture and the vertical fixture can also be connected by screws, and they can be connected to the workbench as a whole by screws. In addition, the horizontal fixture and the inclined fixture can also be connected by screws, and they can be connected to the workbench as a whole by screws.

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