Model pose four-degree-of-freedom adjusting mechanism suitable for high-speed impact load

Abstract

The invention discloses a model pose four-degree-of-freedom adjusting mechanism suitable for a high-speed impact load, and relates to the technical field of aerospace test equipment. A moving frame of the translation lifting module can move on the surface of a base plate along the X axis, a lifting box body can ascend and descend in the moving frame along the Y axis, the bottom of the head end of a yaw rotating box body of the yaw adjusting module is rotationally connected with the surface of the lifting box body, the tail end of the yaw rotating box body can deflect around the Y axis, and the bottom of the head end of a supporting platform of the pitching adjusting module is hinged to the yaw rotating box body. And the guide supporting rails are arranged on the two sides of the translation lifting module and are connected with the movable frame through the overturn-preventing module, and locking and positioning can be carried out in all degrees of freedom. The model posture adjusting mechanism has four degrees of freedom and can be locked and positioned at any position, four-degree-of-freedom precise posture adjustment of the model is realized, and meanwhile, the anti-overturning module is matched, so that the posture precision and rigidity requirements of a wind tunnel on the large model posture adjusting mechanism are met.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace test equipment, and specifically to a four-degree-of-freedom adjustment mechanism for the model pose under high-speed impact loads. Background Art

[0002] As the core facilities for aerodynamic research, pneumatic test equipment such as hypersonic wind tunnels and aerospace engine tests are important platforms for testing the aerodynamic characteristics of aircraft and verifying the performance of engines. The model pose adjustment mechanism, as the core equipment of pneumatic tests, its performance directly affects the reliability of test data. By adjusting the angle of attack, yaw angle and spatial position of the test model, the model pose adjustment mechanism can simulate the aerodynamic loads of the aircraft under different flight postures and provide key parameters for aircraft design.

[0003] However, the movement of different degrees of freedom of traditional model pose adjustment mechanisms generally relies on the stop of power devices to determine the pose. For small model pose adjustment mechanisms, there is no obvious impact. However, for large model pose adjustment mechanisms with large loads, the load and power transmission of each degree of freedom are more complex, resulting in larger model pose adjustment errors. Moreover, each degree of freedom lacks fast and effective locking, and is prone to displacement under high dynamic loads (such as impact loads), unable to meet the test requirements.

[0004] In hypersonic wind tunnel experiments, the model pose adjustment mechanism needs to work in a complex environment (the working temperature in the local windward area reaches over 2000K for a short time, the single working time is in milliseconds, and it needs to adapt to the natural environment with high altitude and large humidity range), and at the same time, it also needs to withstand complex aerodynamic loads and impact loads. Therefore, for large model pose adjustment mechanisms, they must have excellent stiffness and strength characteristics and relatively high natural frequencies to meet the test requirements. Summary of the Invention

[0005] To solve the deficiencies in the background art, the present invention provides a four-degree-of-freedom adjustment mechanism for the model pose under high-speed impact loads, which has two linear motions of translation and lifting and two rotational motions of yaw and pitch, and can be locked and positioned at any position in the four degrees of freedom to achieve precise pose adjustment of the model in four degrees of freedom. At the same time, it is equipped with an anti-overturning module to meet the pose accuracy and rigidity requirements of the wind tunnel for large model pose adjustment mechanisms.

[0006] To achieve the above object, the present invention adopts the following technical solution: A four-degree-of-freedom adjustment mechanism for the model pose under high-speed impact loads, including a translation and lifting module, an anti-overturning module, a yaw adjustment module, a pitch adjustment module, and a guiding and supporting track; The translation and lifting module includes a base plate, a moving frame, and a lifting box. The moving frame is slidably connected to the surface of the base plate and is driven by a motor screw to displace along the X-axis. The lifting box is slidably connected to the moving frame and is driven by a lifting hydraulic cylinder to lift along the Y-axis. A translation locking assembly is provided on the moving frame for locking and positioning, and a Hanson lock 1 is provided on the lifting box to cooperate with a guide rod 1 for locking and positioning; The yaw adjustment module includes a yaw rotating box. The bottom of the head end of the yaw rotating box is rotatably connected to the surface of the lifting box through a slewing bearing. The tail end of the yaw rotating box is driven by a yaw hydraulic cylinder to deflect around the Y-axis, and a yaw locking assembly is provided for locking and positioning; The pitch adjustment module includes a support platform. The bottom of the head end of the support platform is hinged to the yaw rotating box through a rotating shaft. The bottom of the tail end of the support platform is driven by a pitch hydraulic cylinder to deflect around the Z-axis, and a Hanson lock 2 is provided to cooperate with a guide rod 2 for locking and positioning; The guiding and supporting tracks are horizontally arranged in parallel on both sides of the translation and lifting module along the X-axis. The anti-overturning module connects the moving frame and the guiding and supporting tracks and can be locked and positioned.

[0007] Further, arc-shaped reinforcing upper ribs are respectively fixed at the four corner positions of the bottom surface of the support platform, and arc-shaped reinforcing lower ribs are respectively fixedly matched at the corresponding positions on the surface of the yaw rotating box. The arc centers of the arc-shaped reinforcing upper ribs and the arc-shaped reinforcing lower ribs coincide with the rotating shaft. A pitch locking assembly is installed between the corresponding arc-shaped reinforcing upper ribs and arc-shaped reinforcing lower ribs for locking and positioning.

[0008] Further, the pitch locking assembly includes a telescopic cylinder 3, a wedge block 3, a roller block 3, a T-shaped pull rod 3, and a connecting seat 3. The connecting seat 3 is fixedly connected to the end of the outer surface of the arc-shaped reinforcing lower rib. The T-shaped pull rod 3 horizontally penetrates through the connecting seat 3 and the arc-shaped reinforcing lower rib. The nail head end of the T-shaped pull rod 3 extends into the arc groove prefabricated on the arc-shaped reinforcing upper rib. The other end of the T-shaped pull rod 3 is fixedly installed with the roller block 3. The telescopic cylinder 3 is fixed on the outer surface of the arc-shaped reinforcing lower rib and its telescopic end is fixedly provided with the wedge block 3. The wedge block 3 extends between the roller block 3 and the connecting seat 3.

[0009] Further, the translation locking assembly includes a telescopic cylinder 1, a wedge block 1, a roller block 1, a T-shaped pull rod 1, and a connecting seat 1. The connecting seat 1 is fixedly connected to the bottom edge of the moving frame. The T-shaped pull rod 1 vertically penetrates through the through hole prefabricated on the connecting seat 1. The nail head end of the T-shaped pull rod 1 extends into the T-shaped groove prefabricated on the surface of the base plate along the X-axis. The other end of the T-shaped pull rod 1 is fixedly installed with the roller block 1. The telescopic cylinder 1 is horizontally fixed on the surface of the connecting seat 1 and its telescopic end is fixedly provided with the wedge block 1. The wedge block 1 extends between the roller block 1 and the connecting seat 1.

[0010] Further, the first guiding rod is vertically fixed on the inner bottom surface of the moving frame, and the first Hanson lock is fixedly installed on the lifting box body and is slidably sleeved with the corresponding first guiding rod.

[0011] Further, the yaw locking assembly includes a second telescopic cylinder, a second wedge block, a second roller block, a positioning pin and a second connecting seat. The second connecting seat is fixedly connected to the surface of the lifting box body. The positioning pin is vertically fixed on the surface of the lifting box body, and a nut washer is installed at the upper end of the positioning pin. The middle hole of the second roller block is installed in the middle section of the positioning pin. The second telescopic cylinder is horizontally fixed on the surface of the second connecting seat, and a second wedge block is fixedly arranged at its telescopic end. The second wedge block extends between the end of the second roller block and the second connecting seat. The first end of the second roller block is integrally provided with a pressing part, and the pressing part cooperates with the arc-shaped outer edge integrally arranged at the bottom of the tail end of the yaw rotating box body.

[0012] Further, the upper end of the second guiding rod is hinged to the corresponding position on the bottom surface of the support platform, and the second Hanson lock is slidably sleeved on the second guiding rod and is hinged to the yaw rotating box body.

[0013] Further, the anti-overturning module is installed in the boxes at the four corners of the top of the moving frame, and includes a moving block, an auxiliary guide rail and four locking units. Each locking unit includes a fourth telescopic cylinder, a fourth wedge block, a fourth roller block, a fourth T-shaped pull rod and a fourth connecting seat. The outer side of the moving block abuts against the inner side of the guiding support rail, and guiding and positioning wheels are arranged at the upper and lower ends of the moving block and are clamped and matched with the prefabricated guide grooves of the guiding support rail to move along with it. Four adapter columns are vertically fixed at the four corners of the inner side of the moving block, and the four adapter columns all extend into the box of the moving frame for loading the corresponding locking units. The auxiliary guide rail is fixed at the middle position of the inner side of the moving block along the X-axis direction, and the slide block matched with the auxiliary guide rail is fixedly connected to the corresponding position of the box of the moving frame. The fourth connecting seat is fixedly connected to the adapter column. The fourth T-shaped pull rod horizontally penetrates through the through holes prefabricated in the fourth connecting seat, the adapter column and the moving block. The nail head end of the fourth T-shaped pull rod extends into the T-shaped groove prefabricated along the X-axis on the inner side of the guiding support rail, and the other end of the fourth T-shaped pull rod is fixedly installed with the fourth roller block. The fourth telescopic cylinder is fixed on the fourth connecting seat, and a fourth wedge block is fixedly arranged at its telescopic end. The fourth wedge block extends between the fourth roller block and the fourth connecting seat.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention realizes two linear motion degrees of freedom of translation and lifting through the translation and lifting module, and realizes two rotational motion degrees of freedom of yaw and pitch through the yaw adjustment module and the pitch adjustment module. Moreover, locking modules are designed for the four degrees of freedom respectively, enabling the overall model pose adjustment mechanism to be locked and positioned at any position of the four degrees of freedom. In addition, guiding and supporting rails are carried on both sides of the translation and lifting module, and the two are connected through an anti-overturning module with both sliding guidance and position locking functions, integrating multi-degree-of-freedom motion control and high-precision locking functions, and being able to realize the precise pose adjustment of the model in a complex flow field. Under the working conditions of extreme loads and working environments, the locking module can still maintain reliable operation, improve the overall rigidity, and achieve a natural frequency of more than 60 Hz, providing key technical support for aerodynamic tests of hypersonic aircraft, aero-engines, etc., and meeting the pose accuracy and rigidity requirements for large-scale model pose adjustment mechanisms. Description of the Drawings

[0015] Figure 1 is an axonometric view of the overall structure of the adjustment mechanism of the present invention; Figure 2 is an axonometric schematic view of the translation and lifting module in the adjustment mechanism of the present invention; Figure 3 is a front view schematic view of the translation and lifting module in the adjustment mechanism of the present invention; Figure 4 is a sectional structure schematic view of the translation locking assembly in the adjustment mechanism of the present invention; Figure 5 is a sectional structure schematic view of the anti-overturning module in the adjustment mechanism of the present invention; Figure 6 is an axonometric schematic view of the yaw adjustment module in the adjustment mechanism of the present invention; Figure 7 is a front view schematic view of the yaw adjustment module in the adjustment mechanism of the present invention; Figure 8 is a sectional structure schematic view of the yaw locking assembly in the adjustment mechanism of the present invention; Figure 9 is a three-dimensional schematic view of the pitch adjustment module in the adjustment mechanism of the present invention; Figure 10 is a sectional structure schematic view of the pitch locking assembly in the adjustment mechanism of the present invention.

[0016] In the figure: 1. Translation and lifting module; 2. Anti-overturning module; 3. Yaw adjustment module; 4. Pitch adjustment module; 5. Guide and support track; 101. Substrate; 102. Moving frame; 103. Motor screw; 104. Linear guide assembly; 105. Translation locking assembly; 106. Lifting box; 107. Hanson lock 1; 108. Guide rod 1; 109. Lifting hydraulic cylinder; 1051. Telescopic cylinder 1; 1052. Wedge block 1; 1053. Roller block 1; 1054. T-shaped pull rod 1; 1055. Connecting seat 1; 1056. Friction gasket; 201. Telescopic cylinder 4; 202. Wedge block 4; 203. Roller block 4; 204. T-shaped pull rod 4; 205. Connecting seat 4; 206. Adapter column; 207. Moving block; 208. Auxiliary guide; 301. Yaw rotating box; 302. Slewing bearing; 303. Circular arc guide assembly; 304. Yaw hydraulic cylinder; 305. Yaw locking assembly; 306. Hinge base; 307. Power base; 3051. Telescopic cylinder 2; 3052. Wedge block 2; 3053. Roller block 2; 3054. Positioning pin; 3055. Connecting seat 2; 401. Support platform; 402. Rotating shaft; 403. Pitch hydraulic cylinder; 404. Guide rod 2; 405. Hanson lock 2; 406. Arc-shaped reinforcing upper rib; 407. Arc-shaped reinforcing lower rib; 408. Pitch locking assembly; 4081. Telescopic cylinder 3; 4082. Wedge block 3; 4083. Roller block 3; 4084. T-shaped pull rod 3; 4085. Connecting seat 3. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] As Figures 1 to 10 shown, a four-degree-of-freedom adjustment mechanism for the model pose under high-speed impact loads, and its overall structure is shown in Figure 1As shown in the figure, it includes a translation and lifting module 1, an anti-overturning module 2, a yaw adjustment module 3, a pitch adjustment module 4, and a guiding and supporting track 5. Among them, the translation and lifting module 1 is located at the bottom as the foundation of the overall mechanism, having two linear motion degrees of freedom of translating along the X-axis and lifting along the Y-axis. The yaw adjustment module 3 is installed above the translation and lifting module 1, having a rotational motion degree of freedom of deflecting around the Y-axis. The pitch adjustment module 4 is installed above the yaw adjustment module 3, having a rotational motion degree of freedom of deflecting around the Z-axis. The guiding and supporting track 5 is horizontally arranged in parallel along the X-axis on both sides of the translation and lifting module 1. The anti-overturning module 2 connects the translation and lifting module 1 and the guiding and supporting track 5 to avoid the overturning problem caused by excessive load.

[0019] Combined with Figures 2 to 3 As shown in the figure, the translation and lifting module 1 includes a base plate 101, a moving frame 102, and a lifting box body 106. The base plate 101 is assembled by splicing along the X-axis direction and is fixed on the surface of the bottom matrix after leveling. The splicing position of the base plate 101 should be strengthened by internal reinforcing ribs. The bottom of the moving frame 102 is slidably connected to the surface of the base plate 101 through a linear guide rail assembly 104. The linear guide rail assembly 104 not only plays a guiding role but also provides longitudinal support for all components above the moving frame 102. The power source for the displacement of the moving frame 102 along the X-axis is a motor screw 103. The screw part of the motor screw 103 is installed at the middle position of the surface of the base plate 101 through a bearing seat. The nut on the screw is fixedly connected to the bottom of the moving frame 102, and the motor part of the motor screw 103 is fixed at the end of the base plate 101. The two sides of the lifting box body 106 are vertically slidably installed inside the moving frame 102 through a slideway module. The power source for the lifting of the lifting box body 106 along the Y-axis is four lifting hydraulic cylinders 109. The cylinder bodies of the four lifting hydraulic cylinders 109 are fixed at the four corners of the inner bottom surface of the moving frame 102, and the piston rod ends of the four lifting hydraulic cylinders 109 extend into the inside of the lifting box body 106 and are hinged to its top panel.

[0020] In addition, locking modules are respectively provided for the X-axis displacement of the moving frame 102 and the Y-axis lifting of the lifting box body 106, where: The locking module of the moving frame 102 uses four translation locking components 105. The four translation locking components 105 are installed at the four corners of the bottom of the moving frame 102 and cooperate with the base plate 101, and can lock and position the moving frame 102 at any position during its displacement along the X-axis. For the specific structure, please refer to Figure 4As shown in the figure, each translation locking assembly 105 includes a first telescopic cylinder 1051, a first wedge block 1052, a first roller block 1053, a first T-shaped pull rod 1054, and a first connecting seat 1055. The first connecting seat 1055 is fixedly connected to the bottom edge of the moving frame 102. The first T-shaped pull rod 1054 vertically penetrates through a prefabricated through hole of the first connecting seat 1055, and the nail head end of the first T-shaped pull rod 1054 extends into a T-shaped groove prefabricated on the surface of the substrate 101 along the X-axis. The other end of the first T-shaped pull rod 1054 is fixedly installed with the first roller block 1053. The first telescopic cylinder 1051 is horizontally fixed on the surface of the first connecting seat 1055, and its telescopic end is fixedly provided with the first wedge block 1052. The first wedge block 1052 extends between the first roller block 1053 and the first connecting seat 1055. By controlling the movement of the first wedge block 1052 by the first telescopic cylinder 1051 to lift the first roller block 1053, the first T-shaped pull rod 1054 is further lifted to press the first connecting seat 1055 against the substrate 101, realizing the positioning of the moving frame 102 at any position on the X-axis. In addition, a friction gasket 1056 can be installed between the first connecting seat 1055 and the substrate 101. The friction gasket 1056 is fixedly connected to the bottom of the first connecting seat 1055 to further increase the friction force between the two.

[0021] The locking module for lifting the box body 106 adopts multiple groups of corresponding Han Chen lockers 107 and guide rods 108. For the specific structure, please refer to Figure 3 As shown in the figure, the first guide rod 108 is vertically fixed on the inner bottom surface of the moving frame 102. The first Han Chen locker 107 is fixedly installed on the bottom panel of the lifting box body 106 and is slidably sleeved with the corresponding first guide rod 108. By locking the first Han Chen locker 107 and the first guide rod 108, the positioning of the lifting box body 106 at any position on the Y-axis is realized.

[0022] Combined with Figure 1 、 Figure 5 As shown in the figure, the anti-overturning module 2 is installed in the boxes at the four corner positions of the top of the moving frame 102 and cooperates with the guiding and supporting tracks 5 on both sides. It has both sliding guiding and position locking functions, can provide a tension force perpendicular to the two side planes, and can further improve the overall rigidity while preventing overturning. For the specific structure, please refer to Figure 5As shown in the figure, the anti-overturning module 2 includes a moving block 207, an auxiliary guide rail 208, and four locking units. Each of the locking units includes a telescopic cylinder four 201, a wedge block four 202, a roller block four 203, a T-shaped pull rod four 204, and a connecting seat four 205. The outer side of the moving block 207 is abutted against the inner side of the guiding and supporting track 5, and guiding and positioning wheels are arranged at the upper and lower ends of the moving block 207 to be clamped and matched with the prefabricated guide grooves of the guiding and supporting track 5 so as to move along with it. Four adapter columns 206 are vertically fixed at the four corner positions of the inner side of the moving block 207. The four adapter columns 206 all extend into the box body of the moving frame 102 for loading the corresponding locking units. The auxiliary guide rail 208 is fixed at the middle position of the inner side of the moving block 207 along the X-axis direction, and the slider matched with the auxiliary guide rail 208 is fixedly connected with the corresponding position of the box body of the moving frame 102. The connecting seat four 205 is fixedly connected with the adapter column 206. The T-shaped pull rod four 204 horizontally penetrates through the through holes prefabricated in the connecting seat four 205, the adapter column 206, and the moving block 207. The nail head end of the T-shaped pull rod four 204 extends into the T-shaped groove prefabricated along the X-axis on the inner side of the guiding and supporting track 5. The other end of the T-shaped pull rod four 204 is fixedly installed with the roller block four 203. The telescopic cylinder four 201 is fixed on the connecting seat four 205 and its telescopic end is fixedly provided with the wedge block four 202. The wedge block four 202 extends between the roller block four 203 and the connecting seat four 205. Among them, each component of the locking unit has no connection relationship with the box body of the moving frame 102, but is carried and assembled by the four adapter columns 206 on the moving block 207. When the telescopic cylinder four 201 extends, the wedge block four 202 pushes the roller block four 203 to move the T-shaped pull rod four 204. The nail head end of the T-shaped pull rod four 204 contacts the T-shaped groove of the guiding and supporting track 5 to generate a force effect, so as to restrict the displacement of the moving block 207 along the guiding and supporting track 5 in the X-axis direction by relying on the frictional force. There is a gap between the adapter column 206 and the corresponding hole of the box body of the moving frame 102. At this time, the locking unit does not strictly restrict the movement of the moving frame 102 in the X-axis direction. Since the moving block 207 is fixed, the interaction between the auxiliary guide rail 208 and its slider provides a pulling force perpendicular to the surface for the moving frame 102, so as to achieve the anti-overturning effect.

[0023] Combined with Figures 6 to 7As shown in the figure, the yaw adjustment module 3 includes a yaw rotating box body 301 and a yaw hydraulic cylinder 304. The bottom of the head end of the yaw rotating box body 301 is rotationally connected to the surface of the lifting box body 106 through a slewing bearing 302. An arc guide rail assembly 303 is arranged between the bottom surface of the yaw rotating box body 301 and the surface of the lifting box body 106 with the slewing bearing 302 as the center for connection, providing longitudinal support and guiding for yaw rotation at the same time. Hinge bases 306 and power bases 307 are respectively fixed at the head and tail ends of the surface of the yaw rotating box body 301 for the load-bearing assembly of the top pitch adjustment module 4. The yaw hydraulic cylinder 304 is used as a power source to control the deflection action of the yaw rotating box body 301. The yaw hydraulic cylinder 304 is horizontally and rotationally installed on the surface of the lifting box body 106 through an adapter support and is located at the tail end of the yaw rotating box body 301. The piston rod end of the yaw hydraulic cylinder 304 is hinged to the side of the tail end of the yaw rotating box body 301, and the yaw angle of the yaw rotating box body 301 is controlled by the telescopic action of the yaw hydraulic cylinder 304.

[0024] In addition, a locking module is also provided for the yaw rotation of the yaw rotating box body 301. A plurality of yaw locking components 305 are arranged at the tail end of the yaw rotating box body 301. For the specific structure, please refer to Figure 8 As shown in the figure, an arc-shaped outer edge is integrally provided at the bottom of the tail end of the yaw rotating box body 301. The arc-shaped outer edge is centered on the slewing bearing 302. A plurality of yaw locking components 305 are arranged adjacent to each other on the periphery of the arc-shaped outer edge. Each yaw locking component 305 includes a second telescopic cylinder 3051, a second wedge block 3052, a second roller block 3053, a positioning pin 3054 and a second connecting seat 3055. The second connecting seat 3055 is fixedly connected to the surface of the lifting box body 106. The positioning pin 3054 is vertically fixed to the surface of the lifting box body 106 by a thread pair. A nut washer is installed at the upper end of the positioning pin 3054. A hole is machined in the middle of the second roller block 3053 and installed on the middle section of the positioning pin 3054. The second telescopic cylinder 3051 is horizontally fixed on the surface of the second connecting seat 3055 and a second wedge block 3052 is fixedly arranged at its telescopic end. The second wedge block 3052 extends into the space between the end of the second roller block 3053 and the second connecting seat 3055. A pressing part is integrally provided at the head end of the second roller block 3053. When the second telescopic cylinder 3051 controls the second wedge block 3052 to continue to extend, the end of the second roller block 3053 gradually lifts up. Under the lever action, the pressing part at the head end of the second roller block 3053 presses down on the arc-shaped outer edge, realizing the positioning of the yaw rotating box body 301 and the lifting box body 106 at any yaw angle.

[0025] Combined with Figure 6 、 Figure 9As shown in the figure, the pitch adjustment module 4 includes a support platform 401, a pitch hydraulic cylinder 403, an arc-shaped reinforcing upper rib 406, and an arc-shaped reinforcing lower rib 407. The bottom of the head end of the support platform 401 is rotatably connected to the hinge base 306 through a rotating shaft 402, enabling the end of the support platform 401 to pitch and swing around the rotating shaft 402. The pitch hydraulic cylinder 403 serves as a power source to control the pitch movement of the support platform 401. The bottom of the cylinder body of the pitch hydraulic cylinder 403 is hinged to the power base 307, and the piston rod end of the pitch hydraulic cylinder 403 is hinged to the bottom of the end of the support platform 401. The pitch angle of the support platform 401 is controlled by the telescopic movement of the pitch hydraulic cylinder 403. To enhance the overall stability and rigidity of the support platform 401 during pitching, arc-shaped reinforcing upper ribs 406 are respectively fixed at the four corners of the bottom surface of the support platform 401, and arc-shaped reinforcing lower ribs 407 are respectively fixedly fitted at the corresponding positions on the surface of the yaw rotating box body 301. The arc centers of the arc-shaped reinforcing upper ribs 406 and the arc-shaped reinforcing lower ribs 407 coincide with the rotating shaft 402, and the corresponding arc-shaped reinforcing upper ribs 406 and arc-shaped reinforcing lower ribs 407 are slidably connected.

[0026] In addition, a locking module is also provided for the pitch rotation of the support platform 401, which consists of two parts: a power area and an arc-shaped reinforcement area. Among them: The locking module in the power area adopts a corresponding guiding rod two 404 and a Hanson lock two 405. For the specific structure, please refer to Figure 9 As shown in the figure, the lower end of the guiding rod two 404 extends into a preset through hole in the power base 307, and the upper end of the guiding rod two 404 is hinged to the corresponding position on the bottom surface of the support platform 401. The Hanson lock two 405 is sleeved on the guiding rod two 404 and is hinged to the power base 307. The positioning of the support platform 401 with the yaw rotating box body 301 at any pitch angle is achieved through the locking of the Hanson lock two 405 and the guiding rod two 404.

[0027] The locking module in the arc-shaped reinforcement area adopts a pitch locking assembly 408 installed on the corresponding arc-shaped reinforcing upper rib 406 and arc-shaped reinforcing lower rib 407. For the specific structure, please refer to Figure 10As shown in the figure, the pitch locking assembly 408 includes a telescopic cylinder three 4081, a wedge three 4082, a roller block three 4083, a T-shaped pull rod three 4084, and a connecting seat three 4085. The connecting seat three 4085 is fixedly connected to the end of the outer surface of the arc-shaped reinforced lower rib 407. The T-shaped pull rod three 4084 horizontally penetrates through the through holes prefabricated in the connecting seat three 4085 and the arc-shaped reinforced lower rib 407. The nail head end of the T-shaped pull rod three 4084 extends into the arc groove prefabricated in the arc-shaped reinforced upper rib 406. The other end of the T-shaped pull rod three 4084 is fixedly installed with the roller block three 4083. The telescopic cylinder three 4081 is fixed on the outer surface of the arc-shaped reinforced lower rib 407, and its telescopic end is fixedly provided with the wedge three 4082. The wedge three 4082 extends between the roller block three 4083 and the connecting seat three 4085. By controlling the movement of the wedge three 4082 by the telescopic cylinder three 4081 to lift the roller block three 4083, the T-shaped pull rod three 4084 can press and lock the corresponding arc-shaped reinforced upper rib 406 and the arc-shaped reinforced lower rib 407. Through the locking of the four groups of arc-shaped reinforced areas, the stiffness of the equipment can be significantly improved, and the seismic resistance of the system can be enhanced.

[0028] The present invention adopts a series-connected four-degree-of-freedom modular structure for the large-scale model pose adjustment mechanism, which is successively an axial translation structure, a normal lifting structure, a yaw swing structure, and a pitch angle of attack structure from bottom to top. Each module is coupled with a servo drive system through a high-rigidity guide rail to achieve full-dimensional adjustment of spatial position and attitude. Compared with the conventional model pose adjustment mechanism, it can bear the self-weight of the 160t mechanism + the 70t model load, and achieve the pitch / yaw angle positioning accuracy of ±0.1° and the axial positioning accuracy of ±2mm, which can meet the test requirements of frontier fields such as hypersonic aircraft and variable cycle engines.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other forms of devices without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A four-degree-of-freedom adjustment mechanism for the model pose under high-speed impact loads, characterized in that: It includes a translation and lifting module (1), an anti-overturning module (2), a yaw adjustment module (3), a pitch adjustment module (4), and a guiding and supporting track (5); The translation and lifting module (1) includes a base plate (101), a moving frame (102), and a lifting box body (106). The moving frame (102) is slidably connected to the surface of the base plate (101) and is driven by a motor screw (103) to displace along the X-axis. The lifting box body (106) is slidably connected to the moving frame (102) and is driven by a lifting hydraulic cylinder (109) to lift along the Y-axis. A translation locking assembly (105) is provided on the moving frame (102) for locking and positioning, and a Hanson lock one (107) is provided on the lifting box body (106) to cooperate with a guide rod one (108) for locking and positioning; The yaw adjustment module (3) includes a yaw rotating box body (301). The bottom of the head end of the yaw rotating box body (301) is rotatably connected to the surface of the lifting box body (106) through a slewing bearing (302). The tail end of the yaw rotating box body (301) is driven by a yaw hydraulic cylinder (304) to deflect around the Y-axis, and a yaw locking assembly (305) is provided for locking and positioning; The pitch adjustment module (4) includes a support platform (401). The bottom of the head end of the support platform (401) is hinged to the yaw rotating box body (301) through a rotating shaft (402). The bottom of the tail end of the support platform (401) is driven by a pitch hydraulic cylinder (403) to deflect around the Z-axis, and a Hanson lock two (405) is provided to cooperate with a guide rod two (404) for locking and positioning; The guiding and supporting tracks (5) are horizontally arranged in parallel on both sides of the translation and lifting module (1) along the X-axis. The anti-overturning module (2) connects the moving frame (102) and the guiding and supporting tracks (5) and can be locked and positioned.

2. The four-degree-of-freedom adjustment mechanism for the model pose applicable to high-speed impact loads according to claim 1, characterized in that: Arc-shaped reinforcing upper ribs (406) are respectively fixed at the four corner positions of the bottom surface of the support platform (401). Arc-shaped reinforcing lower ribs (407) are respectively fixedly matched at the corresponding positions on the surface of the yaw rotating box body (301). The arc centers of the arc-shaped reinforcing upper ribs (406) and the arc-shaped reinforcing lower ribs (407) coincide with the rotating shaft (402). A pitch locking assembly (408) is installed between the corresponding arc-shaped reinforcing upper ribs (406) and arc-shaped reinforcing lower ribs (407) for locking and positioning.

3. A four-degree-of-freedom adjustment mechanism for the model pose applicable to high-speed impact loads according to claim 2, characterized in that: The pitching locking assembly (408) includes a telescopic cylinder three (4081), a wedge three (4082), a roller block three (4083), a T-shaped pull rod three (4084) and a connecting seat three (4085). The connecting seat three (4085) is fixedly connected to the end of the outer surface of the arc-shaped reinforced lower rib (407). The T-shaped pull rod three (4084) horizontally penetrates through the connecting seat three (4085) and the arc-shaped reinforced lower rib (407). The head end of the T-shaped pull rod three (4084) extends into the arc-shaped groove prefabricated in the arc-shaped reinforced upper rib (406). The other end of the T-shaped pull rod three (4084) is fixedly installed with the roller block three (4083). The telescopic cylinder three (4081) is fixed on the outer surface of the arc-shaped reinforced lower rib (407), and its telescopic end is fixedly provided with the wedge three (4082). The wedge three (4082) extends between the roller block three (4083) and the connecting seat three (4085).

4. A four-degree-of-freedom adjustment mechanism for the model pose applicable to high-speed impact loads according to claim 1, characterized in that: The translation locking assembly (105) includes a telescopic cylinder one (1051), a wedge one (1052), a roller block one (1053), a T-shaped pull rod one (1054) and a connecting seat one (1055). The connecting seat one (1055) is fixedly connected to the bottom edge of the moving frame (102). The T-shaped pull rod one (1054) vertically penetrates through the through hole prefabricated in the connecting seat one (1055). The head end of the T-shaped pull rod one (1054) extends into the T-shaped groove prefabricated along the X-axis on the surface of the substrate (101). The other end of the T-shaped pull rod one (1054) is fixedly installed with the roller block one (1053). The telescopic cylinder one (1051) is horizontally fixed on the surface of the connecting seat one (1055), and its telescopic end is fixedly provided with the wedge one (1052). The wedge one (1052) extends between the roller block one (1053) and the connecting seat one (1055).

5. A four-degree-of-freedom adjustment mechanism for the model pose applicable to high-speed impact loads according to claim 1, characterized in that: The guide rod one (108) is vertically fixed on the inner bottom surface of the moving frame (102). The Hanshen lock one (107) is fixedly installed on the lifting box body (106) and is slidably connected to the corresponding guide rod one (108).

6. The four-degree-of-freedom adjustment mechanism for the model pose applicable to high-speed impact loads according to claim 1, wherein: The yaw locking assembly (305) includes a telescopic cylinder two (3051), a wedge two (3052), a roller block two (3053), a positioning pin (3054) and a connecting seat two (3055). The connecting seat two (3055) is fixedly connected to the surface of the lifting box body (106). The positioning pin (3054) is vertically fixed on the surface of the lifting box body (106). A nut washer is installed at the upper end of the positioning pin (3054). The middle hole of the roller block two (3053) is installed in the middle section of the positioning pin (3054). The telescopic cylinder two (3051) is horizontally fixed on the surface of the connecting seat two (3055), and its telescopic end is fixedly provided with the wedge two (3052). The wedge two (3052) extends between the end of the roller block two (3053) and the connecting seat two (3055). The head end of the roller block two (3053) is integrally provided with a pressing part, and the pressing part cooperates with the arc-shaped outer edge integrally provided at the bottom of the tail end of the yaw rotating box body (301).

7. A four-degree-of-freedom adjustment mechanism for the model pose applicable to high-speed impact loads according to claim 1, characterized in that: The upper end of the second guide rod (404) is hinged to the corresponding position on the bottom surface of the support platform (401), and the second Hanshen lock (405) is slidably sleeved on the second guide rod (404) and hinged to the yaw rotating box body (301).

8. A four-degree-of-freedom adjustment mechanism for the model pose applicable to high-speed impact loads according to claim 1, characterized in that: The anti-overturning module (2) is installed in the boxes at the four corners of the top of the moving frame (102), and includes a moving block (207), an auxiliary guide rail (208) and four locking units. Each locking unit includes a fourth telescopic cylinder (201), a fourth wedge block (202), a fourth roller block (203), a fourth T-shaped pull rod (204) and a fourth connecting seat (205). The outer side of the moving block (207) abuts against the inner side of the guiding support track (5), and guiding and positioning wheels are arranged at the upper and lower ends of the moving block (207) to be clamped and matched with the prefabricated guide grooves of the guiding support track (5) so as to move along with it. Four transfer columns (206) are vertically fixed at the four corner positions on the inner side of the moving block (207), and the four transfer columns (206) all extend into the box body of the moving frame (102) for loading the corresponding locking units. The auxiliary guide rail (208) is fixed at the middle position on the inner side of the moving block (207) along the X-axis direction, and the slider matched with the auxiliary guide rail (208) is fixedly connected to the corresponding position of the box body of the moving frame (102). The fourth connecting seat (205) is fixedly connected to the transfer column (206). The fourth T-shaped pull rod (204) horizontally penetrates through the through holes prefabricated in the fourth connecting seat (205), the transfer column (206) and the moving block (207). The nail head end of the fourth T-shaped pull rod (204) extends into the T-shaped groove prefabricated along the X-axis on the inner side of the guiding support track (5), and the other end of the fourth T-shaped pull rod (204) is fixedly installed with the fourth roller block (203). The fourth telescopic cylinder (201) is fixed on the fourth connecting seat (205), and its telescopic end is fixedly provided with the fourth wedge block (202), and the fourth wedge block (202) extends between the fourth roller block (203) and the fourth connecting seat (205).

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