CN117740390A - Vector force multi-degree-of-freedom center loading device - Google Patents

Abstract

The application relates to a vector force multi-degree-of-freedom center loading device, which comprises a supporting bottom plate, a rotating table, a ball socket seat, a ball socket sliding seat and a thrust loading assembly; the rotary table is rotatably arranged on the supporting bottom plate; the ball socket seat is of an arc-shaped structure, the concave cambered surface of the ball socket seat is upwards arranged on the rotary table, and a track is arranged on the concave cambered surface of the ball socket seat; the ball socket sliding seat is matched with the track; one end of the thrust loading assembly is connected with the ball socket sliding seat, and the second end of the thrust loading assembly is suitable for being connected to the tail end of an engine. The vector force multi-degree-of-freedom center loading device solves the problem that an engine can measure vector thrust more accurately on the basis of ensuring simple structure, easiness in processing and convenience in operation. The application adopts the multi-degree-of-freedom loading to replace the traditional axial thrust loading mode, so that the engine thrust test can simulate the real working condition more truly.

Description

Vector force multi-degree-of-freedom center loading device

Technical Field

The application relates to the technical field of force value testing, in particular to a vector force multi-degree-of-freedom center loading device.

Background

In recent years, with the high-speed development of aviation technology, the performance of fighter aircraft is greatly improved, and vector thrust has become a necessary technology for improving technical and tactical indexes of fighter aircraft. Compared with the fixed direction thrust of the common engine, the vector thrust engine can regulate and control the tail jet flow direction within a certain angle range, so as to change the thrust direction to supplement or replace aerodynamic force generated by a conventional flight control surface, and improve the short-distance take-off and landing capability and maneuverability of the aircraft. The thrust and direction of an aero-engine are important factors in determining the speed, altitude and maneuverability of an aircraft. The accuracy of the vector thrust test result directly influences the flight envelope range, mission action and safety, and is the basis of the development and application of the aviation vector thrust engine, so that vector force needs to be accurately measured in the test research of the vector thrust engine and the vector spray pipe. The research of the vector thrust technology in China is relatively late, such as low reliability, low precision, lack of pneumatic correction technology and the like of vector thrust measurement results in the whole and part tests of the aero-engine, and the method becomes one of the bottlenecks for restricting the development of the whole vector thrust technology in China.

The multi-degree-of-freedom loading device is an important device for realizing vector thrust implementation, rolling motion of thrust in the circumferential range of 0-360 degrees and deflection motion loading in the range of 0-25 degrees can be realized through ingenious designs of a multi-angle loading base, a gear assembly and the like, and stable loading of vector thrust is finally realized through control of a hydraulic cylinder.

The multi-degree-of-freedom center loading device not only can be applied to the field of engine thrust test, but also can be applied to large-force-value multi-angle vector thrust tests of automobiles, ships and the like.

Disclosure of Invention

In view of this, the present application proposes a vector force multiple degree of freedom center loading device, including a support base plate, a rotary table, a ball socket seat, a ball socket sliding seat, and a thrust loading assembly; the rotary table is rotatably arranged on the supporting bottom plate; the ball socket seat is of an arc-shaped structure, the concave cambered surface of the ball socket seat is upwards arranged on the rotary table, and a track is arranged on the concave cambered surface of the ball socket seat; the ball socket sliding seat is matched with the track; one end of the thrust loading assembly is connected with the ball socket sliding seat, and the second end of the thrust loading assembly is suitable for being connected to the tail end of an engine.

In one possible implementation, the device further includes a first driving part; the middle part of the supporting bottom plate is provided with a first rotating shaft, the rotating table is fixedly arranged on the first rotating shaft in a penetrating mode, the first driving part is arranged at one end, close to one end, of the supporting bottom plate, and the first driving part is in transmission connection with the rotating table.

In one possible implementation manner, the support bottom plate is provided with rolling loading hole sites in the circumferential direction of the first rotating shaft, and the rotating platform is provided with through holes matched with the rolling loading hole sites; the ball socket seat is of an arc-shaped strip structure, a track is arranged on the ball socket seat, the track is arranged on the concave arc surface of the ball socket seat along the length direction of the ball socket seat, and a deflection loading hole site is arranged on the ball socket seat along the track.

In one possible implementation, the end face of the ball socket sliding seat, which contacts the rail, is provided with a plurality of balls so as to enable the ball socket sliding seat to be in rolling connection with the ball socket seat.

In one possible implementation manner, a rack structure is arranged on one side of the ball socket seat along the track direction, and a rotating assembly is arranged on one side of the ball socket sliding seat adjacent to the rack structure; the rotating assembly comprises a support, a second driving part, a second rotating shaft and a fourth gear matched with the rack structure, wherein the support is installed on one side of the ball socket sliding seat, the second rotating shaft is installed on the support, the fourth gear is fixedly arranged on the second rotating shaft in a penetrating mode, and the second driving part is arranged on the second rotating shaft.

In one possible implementation, the ball valve sliding seat is symmetrically arranged along the central axis, and the inclination angle of the single-side cambered surface of the ball valve sliding seat is not more than 40 degrees.

In one possible implementation, the device further comprises a gear assembly, wherein the gear assembly is provided with at least a large gear; the gear wheel is arranged on the supporting bottom plate, the rotary table is of a circular structure, the diameter of the rotary table is slightly larger than that of the gear wheel, the gear wheel is coaxially arranged with the rotary table, and the gear wheel is integrally formed with the rotary table.

In one possible implementation, the thrust loading assembly includes a torque sensor and a ram; a first hinged ball head is arranged at one end of an output rod of the oil cylinder, and the oil cylinder is hinged and fixed with the ball socket sliding seat through the first hinged ball head; the torque sensor is arranged at the top of the oil cylinder, a second hinged ball head is arranged on the torque sensor, and the torque sensor is connected to the tail end of the engine through the second hinged ball head.

In one possible implementation, the torque sensor is a spoke sensor.

In one possible implementation, the ball socket is provided with an angle scale on the same side as the rack structure.

The beneficial effects of this application: through setting up rotatable revolving stage on supporting baseplate to be provided with the ball socket seat that concave cambered surface set up on the revolving stage, install the thrust loading subassembly on the ball socket seat can rotate 360 on supporting baseplate through one with the revolving stage, and accomplish the beat of predetermineeing the angle in the ball socket seat. The vector force multi-degree-of-freedom center loading device solves the problem of accurately measuring vector thrust on the basis of ensuring simple structure, easy processing and convenient operation.

In short, the application adopts the multi-degree-of-freedom loading to replace the traditional axial thrust loading mode, so that the engine thrust test can simulate the real working condition more truly. The loading rod is connected with the hydraulic oil cylinder in series, and is connected in a hinged ball head and ball socket mode, so that the multi-degree-of-freedom loading device is convenient to install and adjust.

In sum, the vector force multi-degree-of-freedom center loading device solves the problems that the calculated thrust and the actual loading thrust have larger deviation due to the deviation of the action point in the loading process, the unidirectional force space combination is limited to be fixed by a plurality of angles and the like in the traditional vector force loading, realizes the multi-angle and multi-point accurate loading of the vector thrust of the aero-engine, improves the measuring accuracy of the vector thrust measuring result of the aero-engine, and provides a quick, economic and reliable testing and calibrating means for the research of the vector thrust of the engine. The vector force multi-degree-of-freedom loading device acts on the vector force multi-degree-of-freedom measuring loading system formed by functions on the multi-component force measuring platform, the magnitude and the direction of the vector force are calculated through the multi-component force measuring platform, and the advantage that the whole table top acts on the tail of the engine through the multi-component force measuring platform is that the vector force actually born by the engine can be accurately obtained, and the problem that the actual loading force is inconsistent with the theoretical loading force due to the fact that an action point in the loading process is deviated when the traditional single-point acts on the engine is effectively solved.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the present application and together with the description, serve to explain the principles of the present application.

Fig. 1 shows a force value measurement scenario schematic diagram of a vector force multiple degree of freedom center loading device according to an embodiment of the present application;

FIG. 2 illustrates a schematic perspective view of a ball and socket slide and thrust loading assembly according to an embodiment of the present application;

FIG. 3 illustrates a schematic cross-sectional view of a ball and socket slide and thrust loading assembly of an embodiment of the present application;

FIG. 4 illustrates a top view of a vector force multiple degree of freedom center loading device according to an embodiment of the present application;

FIG. 5 illustrates a cross-sectional schematic view of a vector force multiple degree of freedom center loading device in accordance with an embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood, however, that the terms "center," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description or to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

In addition, numerous specific details are set forth in the following detailed description in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements, and circuits have not been described in detail as not to unnecessarily obscure the present application.

As shown in fig. 1-5, the vector force multiple degree of freedom center loading device comprises: the ball socket seat 221 is of an arc-shaped structure, the concave arc surface of the ball socket seat 221 is upwards arranged on the rotary table 213, a track 224 is arranged on the concave arc surface of the ball socket seat 221, the ball socket seat 222 is matched with the track 224, one end of the thrust loading assembly is connected with the ball socket seat 222, and the second end of the thrust loading assembly is suitable for being connected to the tail end of an engine.

In this embodiment, by providing the rotatable rotation table 213 on the support base 211 and providing the ball socket seat 221 provided with the concave arc surface facing upward on the rotation table 213, the thrust loading assembly mounted on the ball socket seat can be rotated 360 ° on the support base 211 together with the rotation table 213, and the deflection of the preset angle is completed in the ball socket seat 221. The vector force multi-degree-of-freedom center loading device solves the problem that an engine can measure vector thrust more accurately on the basis of ensuring simple structure, easy processing and convenient operation.

In short, the application adopts the multi-degree-of-freedom loading to replace the traditional axial thrust loading mode, so that the engine thrust test can simulate the real working condition more truly. The loading rod is connected in series with the hydraulic cylinder 231 and is connected in a hinged ball head and ball socket mode, so that the multi-degree-of-freedom loading device is convenient to install and adjust.

In sum, the vector force multi-degree-of-freedom center loading device solves the problems that the calculated thrust and the actual loading thrust have larger deviation due to the deviation of the action point in the loading process, the unidirectional force space combination is limited to be fixed by a plurality of angles and the like in the traditional vector force loading, realizes the multi-angle and multi-point accurate loading of the vector thrust of the aero-engine, improves the measuring accuracy of the vector thrust measuring result of the aero-engine, and provides a quick, economic and reliable testing and calibrating means for the research of the vector thrust of the engine.

More specifically, the vector force multi-degree-of-freedom loading device acts on the component force platform 30 and the tail end of the engine, and the advantage of integrally acting on the tail end 40 of the engine through the component force platform 30 is that the vector force actually born by the engine can be accurately obtained, so that the problem that the actual loading force and the theoretical loading force are inconsistent due to the fact that the action point is deviated in the loading process when the traditional single-point acting on the engine is effectively solved.

It should be noted that, the thrust loading assembly may be directly connected to the tail end of the engine, or the thrust loading assembly may be installed on the component force platform 30, and the component force platform 30 may be directly implemented by using the prior art through the component force platform 30 being connected to the tail end of the engine, so that the component force platform 30 is not described in more detail in this application.

In one embodiment, the rotary table 213 further includes a first driving portion 215, a first rotation shaft is disposed in the middle of the supporting base 211, the rotation table 213 is fixed on the first rotation shaft in a penetrating manner, the first driving portion 215 is disposed near one end of the supporting base 211, and the first driving portion 215 is in transmission connection with the rotation table 213.

In this embodiment, the first drive portion 215 may be a motor or a hand wheel. When the hand wheel is adopted for driving, at least a small, medium and large three-stage transmission mechanism is adopted, and the design of the multi-stage gear assembly 212 can enable the multi-degree-of-freedom loading device to save more labor when in rolling motion.

As shown in fig. 5, in one embodiment, the gear assembly 212 is designed to make the multiple degrees of freedom loading device more labor-saving when performing two degrees of freedom motions of rolling and swaying, and the supporting base plate 211 and the ball socket base 221 are provided with positioning holes for prompting the user to rotate to a fixed point, so as to facilitate the adjustment of the angle.

More specifically, the supporting base plate 211 is provided with a rolling loading hole site 216 in the circumferential direction of the first rotation shaft, the rotation table 213 is provided with a through hole matched with the rolling loading hole site 216, the ball socket seat 221 is in an arc-shaped strip structure, the ball socket seat 221 is provided with a track 224, the track 224 is arranged on the concave arc surface of the ball socket seat 221 along the length direction of the ball socket seat 221, and the ball socket seat 221 is provided with a deflection loading hole site 229 along the track 224.

To test vector forces at different angles, the turntable 213 is rotated to different angles, and matched screws are installed in the tumble loading hole site 216, and the turntable 213 and the ball socket 221 are fixed on the support base 211. Similarly, for the ball socket sliding seat 222, the ball socket sliding seat 221 needs to slide to a certain angle, and matched screws are installed in the deflection loading hole site 229, so that the ball socket sliding seat 222 is completely fixed at a certain angle position of the ball socket seat 221, and finally as shown in fig. 1, the supporting base plate 211 is fixed to the engine reaction frame, and then the supporting seat 10 is fixed to complete a force value test experiment of vector thrust of each angle position.

It should be specifically explained that, regarding the location of the rolling loading hole site 216 on the rotary table 213, the present application is not limited, and only needs to ensure that the rolling loading hole site 216 on the rotary table 213 can coincide with more than two rolling loading hole sites 216 on the support base 211 when the rotary table 211 rotates on the support base 211, and that the fixing hole sites can ensure that the device itself has sufficient structural strength and does not shake during the experimental process.

Similarly, the setting position of the yaw loading hole 229 on the ball socket sliding seat 221 is not limited in this application, and only the ball socket sliding seat 222 is required to slide or roll on the ball socket seat 221, where the yaw loading hole 229 can be overlapped with the yaw loading hole 229 on the ball socket sliding seat 222, and in the experimental process, the fixing hole can ensure that the device has enough structural strength and can not shake.

More specifically, in one embodiment, the supporting base 211 is provided with rolling loading holes 216 in the circumferential direction of the first rotating shaft, the rotating platform 213 is provided with through holes matched with the rolling loading holes, the ball socket base 221 is in an arc-shaped strip structure, the ball socket base 221 is provided with a track, the track is arranged on the concave arc surface of the ball socket base 221 along the length direction of the ball socket base 221, the ball socket base 221 is provided with deflection loading holes 229 along the track, the number of the rolling loading holes 216 is 16, the rolling loading holes 216 are uniformly arranged in the circumferential direction of the first rotating shaft, the deflection loading holes 229 are arranged on the upper surface of the track, and the adjacent deflection loading holes 229 are arranged at intervals of 5 degrees.

In one embodiment, the end surface of the ball socket slide 222 in contact with the rail 224 is provided with a plurality of balls to rollingly connect the ball socket slide 222 with the ball socket 221.

In this embodiment, rolling steel balls are disposed in the seat body where the ball socket sliding seat 222 contacts with the ball socket seat 221, so that sliding friction is converted into rolling friction, and the thrust loading device is more time-saving and labor-saving when performing the yaw motion.

In one embodiment, a rack structure 225 is disposed on one side of the ball socket base 221 along the direction of the track 224, a rotating assembly is disposed on one side of the ball socket sliding base 222 adjacent to the rack structure 225, the rotating assembly includes a bracket, a second driving portion 227, a second rotating shaft, and a fourth gear matched with the rack structure 225, the bracket is mounted on one side of the ball socket sliding base 222, the second rotating shaft is mounted on the bracket, the fourth gear is fixedly mounted on the second rotating shaft in a penetrating manner, and the second driving portion 227 is disposed on the second rotating shaft.

In this embodiment, the second driving portion 227 may be driven by a motor or a hand wheel, and may adopt a multi-stage gear transmission manner, so that the yaw angle movement of the thrust loading device is more labor-saving when the hand wheel rotates.

In one embodiment, the ball valve sliding seat 222 is symmetrically disposed along the central axis, and the single-sided arc of the ball valve sliding seat 222 is inclined by no more than 30 °.

In one embodiment, the gear assembly 212 in the supporting base 211 includes a large gear, a medium gear and a small gear, the rotating table 213 has a circular structure, the diameter of the rotating table 213 is slightly larger than that of the large gear, and the large gear and the rotating table 213 are integrally formed.

In this embodiment, the diameters of the large gear, the medium gear, and the small gear decrease in order.

In one specific embodiment, the thrust loading assembly includes a torque sensor 232 and an oil cylinder 231, wherein a first hinged ball 223 is installed at one end of an output rod of the oil cylinder 231, the oil cylinder 231 is hinged and fixed with the ball socket sliding seat 222 through the first hinged ball 223, the torque sensor 232 is arranged at the top of the oil cylinder 231, a second hinged ball 233 is arranged on the torque sensor 232, and the torque sensor 232 is connected to the tail end of the engine through the second hinged ball 233.

In one embodiment, the torque sensor 232 is a spoke-type sensor and the ball socket 221 is provided with an angular scale 226 on the same side as the rack structure 225.

In one embodiment, the vector force multiple degree of freedom center loading device of the present application includes a supporting base 211, a gear assembly 212, a rotary table 213, a first locking mechanism 214, and a hand wheel, wherein the supporting base 211 is provided with 6 phi 24 through holes, 4M 20 threaded holes, 8M 12 threaded holes, and a rotation shaft mounting hole for fixing with the engine reaction frame rear supporting seat 10, and 16M 12 threaded holes for connecting with the ball socket 221 every 22.5 ° in 360 ° to realize rotation. The gear assembly 212 is formed by combining large, medium and small gears, and drives the large gear to rotate through the rotation of a hand wheel, and the large gear and the rotary table 213 are integrally machined. Four rolling loading hole sites 216 are arranged in the center of the rotary table 213, and the rotary table 213 and the supporting bottom plate 211 are fixed into a whole through bolts to drive the ball socket base 221 to rotate.

Further, the ball socket 221 is integrally arc-shaped, and has a horizontal rotation track 224 and a plurality of positioning bolts for sliding and positioning the ball socket sliding seat 222. The contact surface of the ball socket sliding seat 222 and the track 224 adopts rolling steel balls, so that friction in deflection is reduced. The oil cylinder 231 is connected with the spoke type force sensor in series and is connected with two ends through a ball head and a ball socket base 221. The ball seat 234 and the ball socket sliding seat 222 are provided with grease filling ports in the inner cavities, the second hinged ball 233 can freely rotate in the inner cavities of the ball seat 234 and the ball socket sliding seat 222 by grease filling, and the second hinged ball 233 can bear the loading force of the oil cylinder 231.

More specifically, the vector force multi-degree-of-freedom center loading device of the application has the following specific working procedures:

and (3) rolling motion adjustment: the hand wheel on the support base 211 is manually operated, the hand wheel drives the pinion to rotate, and the large gear drives the rotary table 213 to rotate through the transmission of the large, medium and small gears, so that the rotary table 213 can rotate within the range of 0-360 degrees. The support base 211 is provided with 45 deg. range loading points for rotation angle indication. A second locking handle mechanism 214 is arranged at the position of the hand wheel and is used for temporarily locking when the angle of the hand wheel is adjusted.

And (3) deflection movement adjustment: the hand wheel on the ball socket base 221 of the thrust loading device is manually operated, and the ball socket sliding base 222 is driven to slide on the ball socket base 221 through the transmission of the pinion and the arc-shaped rack, so that the left-and-right swing of-25 degrees to 0-25 degrees is realized, and the side surface of the ball socket base 221 is provided with a rotation angle scale 226, so that an angle prompt effect is achieved, and the loading angle adjustment of 0 degrees, 5 degrees, 10 degrees, 15 degrees, 20 degrees and 25 degrees is satisfied. A second locking handle mechanism 228 is provided at the hand wheel position for temporary locking when the hand wheel is angularly adjusted. When the system is loaded, the ball socket sliding seat 222 is connected with the ball socket seat 221 for rigidity and safety, four deflection loading holes 229 are formed in the ball socket sliding seat 222, and the ball socket seat 221 and the ball socket sliding seat 222 are fixed into a whole through bolts.

After the position and the angle to be loaded are adjusted, the positioning bolts are ensured to be fixed, the hydraulic servo control system is started, the oil cylinder 231 is controlled to generate thrust, and the spoke type force sensors connected in series are used for monitoring the generated thrust in real time. The sensor is connected with the data acquisition system through a signal wire, mV-level voltage signals output by the sensor are subjected to operation by an amplifier of the data acquisition system, signal amplification is realized, analog signals are converted into digital signals through A/D conversion, the digital signals are transmitted to the upper computer through a USB port, and functions of reading, acquiring, displaying, analyzing, storing and the like of sensor data are performed.

The vector force multi-degree-of-freedom center loading device is tested in the vertical direction by adopting a 300kN superposition type force standard machine, and detailed test data are shown in the attached table 1.1. The vector force calibration device is adopted to carry out an angular (10 DEG) loading test on the vector force multi-degree-of-freedom central loading device, and detailed test data are shown in the attached table 1.2.

The test data show that the vector force multi-degree-of-freedom center loading device is simple and efficient to install, the measured data is accurate and reliable, the stability of force values can reach 0.001%, the traceability performance is good, the vector force multi-degree-of-freedom center loading device can be applied to the thrust test of an aeroengine, and can also be applied to the on-site thrust test of various weaponry, so that the problems that the traditional axial thrust test or the angular loading can only generate lateral force, the measurement accuracy is low and the like are solved.

Table 1.1

Vector force multi-degree-of-freedom center loading device test record 1

Ambient temperature:22℃humidity:45％RH，

loading angle:turning angle 0 degree and deflection angle 0 degree

Table 1.2

Vector force multi-degree-of-freedom center loading device test record 1

Ambient temperature:24℃humidity:38％RH，

loading angle:turning angle 90 degrees and deflection angle 10 degrees

The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The vector force multi-degree-of-freedom center loading device is characterized by comprising a supporting bottom plate, a rotating table, a ball socket seat, a ball socket sliding seat and a thrust loading assembly;

the rotary table is rotatably arranged on the supporting bottom plate;

the ball socket seat is of an arc-shaped structure, the concave cambered surface of the ball socket seat is upwards arranged on the rotary table, and a track is arranged on the concave cambered surface of the ball socket seat;

the ball socket sliding seat is matched with the track;

one end of the thrust loading assembly is connected with the ball socket sliding seat, and the second end of the thrust loading assembly is suitable for being connected to the tail end of an engine.

2. The vector force multiple degree of freedom center loading device of claim 1 further comprising a first drive portion;

the middle part of the supporting bottom plate is provided with a first rotating shaft, the rotating table is fixedly arranged on the first rotating shaft in a penetrating mode, the first driving part is arranged at one end, close to one end, of the supporting bottom plate, and the first driving part is in transmission connection with the rotating table.

3. The vector force multiple degree of freedom center loading device of claim 2 wherein the support base plate is provided with a tumble loading hole site in the circumferential direction of the first rotation axis, the rotation stage having a through hole matching the tumble loading hole site;

the ball socket seat is of an arc-shaped strip structure, a track is arranged on the ball socket seat, the track is arranged on the concave arc surface of the ball socket seat along the length direction of the ball socket seat, and a deflection loading hole site is arranged on the ball socket seat along the track.

4. The vector force multiple degree of freedom center loading device of claim 1 wherein the end face of the ball socket slide contacting the track is provided with a plurality of balls to rollingly couple the ball socket slide to the ball socket slide.

5. The vector force multiple degree of freedom center loading device of claim 1 wherein one side of the ball socket seat is provided with a rack structure along the track direction, and one side of the ball socket slide seat adjacent to the rack structure is provided with a rotating assembly;

the rotating component comprises a bracket, a second driving part, a second rotating shaft and a fourth gear matched with the rack structure,

the support is installed one side of ball socket sliding seat, just install on the support the second axis of rotation, the fourth gear wears to establish to be fixed in on the second axis of rotation, just be provided with on the second axis of rotation the second drive portion.

6. The vector force multiple degree of freedom center loading device of claim 1 wherein the ball valve slide is symmetrically disposed about the central axis, and wherein the single side arcuate surface of the ball valve slide is inclined at an angle of no more than 40 °.

7. The vector force multiple degree of freedom center loading device of claim 1 further comprising a gear assembly having at least a large gear therein;

the gear wheel is arranged on the supporting bottom plate, the rotary table is of a circular structure, the diameter of the rotary table is slightly larger than that of the gear wheel, the gear wheel is coaxially arranged with the rotary table, and the gear wheel is integrally formed with the rotary table.

8. The vector force multiple degree of freedom center loading device of claim 1 wherein the thrust loading assembly includes a torque sensor and a ram;

a first hinged ball head is arranged at one end of an output rod of the oil cylinder, and the oil cylinder is hinged and fixed with the ball socket sliding seat through the first hinged ball head;

the torque sensor is arranged at the top of the oil cylinder, a second hinged ball head is arranged on the torque sensor, and the torque sensor is connected to the tail end of the engine through the second hinged ball head.

9. The vector force multiple degree of freedom center loading device of claim 8 wherein the torque sensor is a spoke sensor.

10. The vector force multiple degree of freedom center loading device of claim 5 wherein the ball socket is provided with an angular scale on the same side of the rack structure.