Torque overrun protection device for rotating arm end of dynamic flight simulator

Abstract

The invention relates to the technical field of flight simulators, and particularly discloses a torque overrun protection device for a rotating arm end of a dynamic flight simulator, which comprises a hydraulic expansion sleeve sleeved on a main shaft and fixedly connected to a rotating arm, and the hydraulic expansion sleeve is used for transmitting torque within a rated torque range and slides relative to the main shaft when the torque exceeds the limit; the taper sleeve is in interference fit with the main shaft and abuts against the conical surface of the inner wall of the hydraulic expansion sleeve through the outer conical surface of the taper sleeve, and the transmission component of the hydraulic expansion sleeve and the main shaft are locked; the bearing assembly is arranged between the main shaft and the rotating arm or the hydraulic expansion sleeve; a rotor of the rotary connector is connected with the main shaft, and a stator of the rotary connector is connected with the rotary arm, so that the continuity of electric connection is kept when relative sliding occurs. Therefore, on the premise that the normal training function of the dynamic flight simulator is not affected, potential harm to a pilot caused by sudden torque overshoot is effectively avoided, and the pilot can be reliably protected under the abnormal working condition.

Description

Technical Field

[0001] This invention relates to the field of flight simulator technology, and more specifically to a torque over-limit protection device for the boom end of a dynamic flight simulator. Background Technology

[0002] A dynamic flight simulator is a special device that uses rotational motion to generate inertial centrifugal force, simulating the continuous acceleration of an aircraft during maneuvering flight on the ground. This equipment is mainly used in fighter pilot selection, astronaut G-force adaptation training, and acceleration physiology research. It can effectively improve the operator's tolerance to high-G environments by realistically simulating flight loads, and features short system dynamic response time and a large torque overload change rate.

[0003] In traditional dynamic flight simulator designs, a direct rigid connection between the spindle and the swing arm is typically used to transmit motor torque, ensuring the reliability of the connection structure. However, this design presents certain safety risks in practical applications: the drive motors of dynamic flight simulators usually retain a certain torque margin. Although the probability of this happening is low, torque overshoot can still occur due to system malfunctions during equipment debugging or operation. Once such a condition occurs, the pilot, under high overload conditions, will face significant physiological risks, potentially even fatal injuries.

[0004] Therefore, effectively avoiding potential harm to pilots caused by sudden torque overshoot without affecting the normal training functions of dynamic flight simulators has become a pressing technical challenge in this field. To address this, the structure of flight simulators needs to be optimized and improved to ensure reliable pilot protection under abnormal operating conditions. Summary of the Invention

[0005] The purpose of this invention is to provide a torque over-limit protection device for the boom end of a dynamic flight simulator, so as to effectively avoid potential harm to the pilot caused by sudden torque overshoot without affecting the normal training function of the dynamic flight simulator, thereby enabling reliable protection of the pilot under abnormal operating conditions.

[0006] This invention is achieved through the following technical solution:

[0007] A torque over-limit protection device for the boom end of a dynamic flight simulator, comprising:

[0008] A hydraulic expansion sleeve is fitted onto the main shaft and fixedly connected to the rotating arm. This hydraulic expansion sleeve is used to transmit torque within the rated torque range and to slide relative to the main shaft when the torque exceeds the limit.

[0009] The tapered sleeve is interference-fitted with the main shaft, and its outer tapered surface presses against the tapered surface of the inner wall of the hydraulic expansion sleeve, thereby locking the transmission component of the hydraulic expansion sleeve to the main shaft;

[0010] A bearing assembly is disposed between the main shaft and the rotating arm or the hydraulic expansion sleeve;

[0011] A rotary connector, wherein the rotor is connected to the main shaft and the stator is connected to the rotating arm, to maintain the continuity of electrical connection when relative slippage occurs.

[0012] In one possible design, the hydraulic expansion sleeve has a sealed oil chamber inside that can be filled and drained with hydraulic oil.

[0013] In one possible design, the hydraulic expansion sleeve includes an integrally formed connecting body and a main body, the connecting body being connected to the rotating arm; the main body having the oil cavity; the connecting body having an oil injection hole communicating with the oil cavity and a screw plug for sealing the oil injection hole.

[0014] In one possible design, the upper end of the spindle is provided with a blade that is positioned opposite the screw plug. This blade is used to cut off the screw plug when the driving torque exceeds the preset torque of the hydraulic expansion sleeve, so that the oil in the oil chamber can be discharged through the cut.

[0015] In one possible design, the working end of the blade is provided with an opening groove for clamping the screw plug, and the inside of the opening groove is provided with a sharp cutting edge.

[0016] In one possible design, the oil chamber is cylindrical and located in the central region of the hydraulic expansion sleeve along the thickness direction.

[0017] In one possible design, the bearing assembly includes a thrust bearing and a radial bearing; the thrust bearing is mounted between the end face of the tapered sleeve and the rotating arm; the radial bearing is mounted between the main shaft and the hydraulic expansion sleeve.

[0018] In one possible design, the rotor of the rotary connector is fixed to the top of the spindle by fasteners.

[0019] In one possible design, the torque over-limit protection device also includes an anti-rotation rod connected to the top of the rotary connector for insertion into a corresponding socket.

[0020] In one possible design, the top of the rotary connector is provided with an extension plate extending radially, and the anti-rotation rod is vertically arranged and connected to the extension plate.

[0021] In one possible design, the hydraulic expansion sleeve is fixedly connected to the rotating arm by bolts; wherein, multiple bolts are provided and evenly spaced along the circumferential direction of the hydraulic expansion sleeve.

[0022] In one possible design, the rotary connector is a conductive slip ring with its rotor fixed to the end of the spindle.

[0023] The advantages of this invention over the prior art are as follows:

[0024] By presetting the torque transmission capacity of the hydraulic expansion sleeve to below the maximum dangerous torque, the torque over-limit protection device can automatically trigger sliding separation when abnormal torque overshoot occurs, thereby cutting off the transmission path of overload torque to the boom and pilot. This effectively solves the safety hazard of potential injury caused by rigid connections in the background technology. Based on the bearing assembly configuration, after the hydraulic expansion sleeve slips, the boom's movement immediately changes from rigid drive to relative rotation supported by the bearing. This avoids severe vibration, collision, or instability that may occur if the boom loses support, ensuring the smoothness and controllability of the protection action and preventing secondary damage. The rotary connector can continuously transmit power and signals during dynamic processes, avoiding equipment power outages, control failures, or data interruptions caused by cable entanglement and breakage. This ensures that the flight simulator maintains its basic electrical and communication functions even under protection conditions, providing a guarantee for safe shutdown or fault diagnosis. Therefore, this torque over-limit protection device can transiently respond to sudden torque overshoot events, has high reliability, and is easy to integrate into existing dynamic flight simulator structures. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0026] Figure 1 This is a cross-sectional view of one embodiment of the torque over-limit protection device for the boom end of a dynamic flight simulator provided by the present invention.

[0027] Figure 2 This is a schematic diagram of the hydraulic expansion sleeve in one embodiment of the torque over-limit protection device for the boom end of a dynamic flight simulator provided by the present invention;

[0028] Figure 3 This is a schematic diagram of the cone sleeve in one embodiment of the torque over-limit protection device for the boom end of a dynamic flight simulator provided by the present invention;

[0029] Figure 4 This is a schematic diagram of the rotary connector in one embodiment of the torque over-limit protection device for the boom end of a dynamic flight simulator provided by the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the torque over-limit protection device for the boom end of a dynamic flight simulator provided by the present invention in one embodiment;

[0031] Figure 6 This is a schematic diagram of the blade in one embodiment of the torque over-limit protection device for the boom end of a dynamic flight simulator provided by the present invention.

[0032] The attached diagram shows the markings and corresponding component names: 1-Hydraulic expansion sleeve, 11-Oil chamber, 12-Oil injection hole, 13-Plug, 14-Connector, 15-Main body, 2-Conical sleeve, 3-Main shaft, 4-Rotating arm, 5-Bearing assembly, 51-Thrust bearing, 52-Radial bearing, 6-Rotary connector, 61-Rotor, 62-Anti-rotation rod, 7-Fastener, 8-Anti-rotation rod, 9-Bolt, 100-Blade, 101-Opening slot, 102-Blade edge. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that while the description of these embodiments is intended to aid in understanding the invention, it does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0034] According to a first aspect of this disclosure, a torque over-limit protection device for the boom end of a dynamic flight simulator is provided. Wherein, Figures 1 to 6 Specific embodiments thereof are shown.

[0035] See Figures 1 to 6 As shown, the torque over-limit protection device for the swing arm end of a dynamic flight simulator includes: a hydraulic expansion sleeve 1, which is sleeved on the main shaft 3 and fixedly connected to the swing arm 4. The hydraulic expansion sleeve 1 is used to transmit torque within the rated torque range and to slide relative to the main shaft 3 when the torque exceeds the limit; a tapered sleeve 2, which is interference-fitted with the main shaft 3 and presses against the tapered surface of the inner wall of the hydraulic expansion sleeve 1 through its outer tapered surface, thereby locking the transmission component of the hydraulic expansion sleeve 1 to the main shaft 3; a bearing assembly 5, which is disposed between the main shaft 3 and the swing arm 4 or the hydraulic expansion sleeve 1; and a rotary connector 6, whose rotor is connected to the main shaft 3 and whose stator is connected to the swing arm 4, so as to maintain the continuity of electrical connection when relative sliding occurs.

[0036] Depending on whether the transmitted torque exceeds a preset safety threshold, the torque over-limit protection device operates under two conditions: normal transmission condition and over-limit protection condition. Under normal transmission condition, the hydraulic expansion sleeve 1 generates sufficient radial clamping force at a set oil pressure, ensuring its inner wall is firmly connected to the main shaft 3 via the tapered sleeve 2. At this time, the torque of the drive motor is reliably transmitted to the rotating arm 4 through the main shaft 3, tapered sleeve 2, and hydraulic expansion sleeve 1, causing the rotating arm 4 and the load (such as a flight simulator cockpit) to rotate smoothly. During this process, the bearing assembly 5, located between the main shaft 3 and the rotating arm 4 or the hydraulic expansion sleeve 1, primarily serves as an auxiliary support. There is no relative movement between the rotor and stator of the rotary connector 6; it only acts as a static electrical path.

[0037] When a system malfunctions and the driving torque suddenly increases and exceeds the preset torque threshold of the hydraulic expansion sleeve 1, the device enters over-limit protection mode. At this time, the static friction between the inner wall of the hydraulic expansion sleeve 1 and the surface of the tapered sleeve 2 is broken, and the two slide relative to each other. The rotational motion of the main shaft 3 and the tapered sleeve 2 can no longer be fully transmitted to the hydraulic expansion sleeve 1 and the rotating arm 4. Due to the presence of the bearing assembly 5, after losing the main driving torque, the rotating arm 4 can enter a stable coasting or deceleration state relative to the main shaft 3 under the support of the bearing, thereby avoiding mechanical impact or structural damage caused by sudden torque changes. At the same time, as the rotating arm 4 and the main shaft 3 rotate relative to each other, the rotor 61 and the stator of the rotary connector 6 begin to rotate relative to each other, so that the power supply lines and signal lines to the rotating arm 4 are not broken during continuous torsion, thereby maintaining the safety and continuity of electrical functions.

[0038] Through the above technical solution, the torque transmission capacity of the hydraulic expansion sleeve 1 is preset to be below the maximum dangerous torque. When abnormal torque overshoot occurs, the torque over-limit protection device automatically triggers sliding separation, thereby cutting off the transmission path of the overload torque to the swing arm 4 and the pilot. This effectively solves the safety hazard of potential injury caused by rigid connections in the background technology. Based on the configuration of the bearing assembly 5, after the hydraulic expansion sleeve 1 slips, the movement of the swing arm 4 immediately changes from rigid drive to relative rotation supported by the bearing. This avoids severe vibration, collision, or instability that may occur if the swing arm 4 loses support, ensuring the smoothness and controllability of the protection action and preventing secondary damage. The rotary connector 6 can continuously transmit power and signals during dynamic processes, avoiding equipment power outages, control failures, or data interruptions caused by cable entanglement and breakage. This ensures that the flight simulator maintains its basic electrical and communication functions under protection conditions, providing a guarantee for safe shutdown or fault diagnosis. Therefore, this torque over-limit protection device can transiently respond to sudden torque overshoot events, has high reliability, and is easy to integrate into existing dynamic flight simulator structures.

[0039] It should be noted that directional terms such as "inner" and "outer" refer to "inner" and "outer" relative to the contour of the component; "inner" refers to the direction towards the component, and "outer" refers to the direction away from it. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Moreover, in the accompanying drawings, the same reference numerals in different drawings represent the same element. It should be noted that "and / or" in the text refers to A and / or B, indicating that there are three possible scenarios: only A, only B, and both A and B. Conversely, "and" in the text refers to A and B, indicating that there are two possible scenarios: only A and both A and B.

[0040] In one embodiment of this disclosure, the hydraulic expansion sleeve 1 has a sealed oil chamber 11 that can be filled and drained with hydraulic oil. By injecting or releasing hydraulic oil into the oil chamber 11, its internal pressure can be easily adjusted, thereby changing the radial clamping force of the hydraulic expansion sleeve 1 on the main shaft 3. This makes the torque protection threshold a flexibly set and continuously adjustable parameter, rather than a fixed value. The operator can accurately set and calibrate the required disengagement torque according to different training subjects, pilot tolerance levels, or equipment safety specifications, improving the adaptability and safety control capabilities of the equipment.

[0041] During normal operation, the static pressure in the oil chamber 11 is uniformly converted into a normal force acting on the main shaft 3 through the expansion sleeve, transmitting torque through static friction, resulting in smooth and noiseless operation. Once the torque exceeds the limit, the static friction is broken, and the expansion sleeve slides relative to the main shaft 3. This process is automatically triggered by physical laws, with a rapid response and no need for external sensors or control circuits. This constitutes a purely mechanical passive safety system with good reliability, thus preventing malfunctions.

[0042] Furthermore, the hydraulic expansion sleeve 1 includes an integrally formed connecting body 14 and a main body 15. The connecting body 14 is connected to the rotating arm 4. The main body 15 is provided with an oil cavity 11. The connecting body 14 is provided with an oil injection hole 12 communicating with the oil cavity 11 and a screw plug 13 for sealing the oil injection hole 12.

[0043] The integrally molded structure can ensure the structural strength between the connecting body 14 and the main body 15, thereby integrating the connecting body 14, which bears the connecting load of the swing arm 4, and the main body 15, which performs the core torque transmission and overload protection functions, into a complete rigid component. This ensures that the hydraulic expansion sleeve 1 has higher structural integrity and mechanical reliability when subjected to complex alternating loads, and avoids the loss of the entire protection device function due to connection failure.

[0044] By placing the oil injection port 12 on the connector 14, which is in a relatively static position with low stress concentration, the risk of cracking or leakage due to stress fatigue under long-term high-load cycling can be reduced to some extent. This improves the long-term stability of the hydraulic system seal and ensures the long-term reliability of the preset torque threshold. Simultaneously, this design allows the oil injection operation and maintenance points to be located on the outside of the structure, facilitating access, operation, and maintenance.

[0045] In this disclosure, see Figure 5 As shown, the upper end of the spindle 3 is provided with a blade 100 that is opposite to the screw plug 13, which is used to cut the screw plug 13 when the driving torque exceeds the preset torque of the hydraulic expansion sleeve 1, so that the oil in the oil chamber 11 can be discharged through the cut.

[0046] When the system malfunctions and the driving torque suddenly increases and exceeds the preset torque threshold of the hydraulic expansion sleeve 1, the device enters over-limit protection mode. At this time, the blade 100 installed on the upper end of the spindle 3 cuts off the upper end of the screw plug 13. Since the upper end of the screw plug 13 has a through hole connected to the oil chamber 11, the hydraulic oil in the oil chamber 11 is quickly discharged through the cut, causing the static friction between the inner wall of the hydraulic expansion sleeve 1 and the surface of the tapered sleeve 2 to be broken, and the two slide relative to each other, causing the hydraulic expansion sleeve 1 to fail.

[0047] The rotational motion of the main shaft 3 and the tapered sleeve 2 can no longer be fully transmitted to the hydraulic expansion sleeve 1 and the rotating arm 4. Due to the supporting effect of the bearing assembly 5, after losing the main driving torque, the rotating arm 4 can enter a stable coasting or deceleration state relative to the main shaft 3 under the support of the bearing assembly 5, thereby avoiding mechanical shock or structural damage caused by sudden torque changes. At the same time, as the rotating arm 4 and the main shaft 3 rotate relative to each other, the rotor and stator of the rotary connector 6 rotate relative to each other, ensuring that the power supply lines and signal lines to the rotating arm 4 are not broken during continuous torsion, thereby maintaining the continuity and safety of electrical functions.

[0048] Further, see Figure 6 As shown, the working end of the blade 100 is provided with an opening groove 101 for clamping the screw plug 13, and the inner side of the opening groove 101 is provided with a sharp cutting edge 102. At the moment when the torque exceeds the limit and the spindle 3 and the rotating arm 4 slide relative to each other, the blade 100 rotates with the spindle 3 and moves towards the screw plug 13. The opening groove 101 can accurately engage with the neck of the screw plug 13, constraining it within the groove, effectively preventing slippage or displacement due to vibration or centrifugal force during the cutting process. This clamping and positioning design ensures reliable execution of the cutting action, avoids the risk of cutting failure or failure to release hydraulic pressure due to poor contact or positional misalignment, and guarantees the deterministic triggering of the protection function.

[0049] By setting the inner side of the slot 101 as a sharp blade 102, the instantaneous force required for cutting can be reduced. Compared to flat-end extrusion or impact cutting, the sharp blade 102 can form extremely high local pressure on the surface of the plug 13 with a very small contact area, achieving a cutting method similar to "cutting" or "shearing," rather than relying on overall structural deformation or fracture. This makes the cutting action faster and more decisive, greatly shortening the response delay between torque over-limit and oil chamber 11 depressurization, allowing the hydraulic expansion sleeve 1 to complete failure disengagement in the shortest possible time, thereby further improving the dynamic response speed of the entire protection device to sudden overload conditions. The blade 102 is located inside the slot and does not contact the plug 13 under normal operating conditions, only performing the cutting task at the moment of operation. This ensures both long-term interference-free operation and functional effectiveness in emergency conditions, achieving a balance between reliability, response speed, and structural simplicity.

[0050] Specifically, the oil cavity 11 is cylindrical and located in the central region of the hydraulic expansion sleeve 1 along the thickness direction. The cylindrical annular structure allows the hydraulic oil pressure to act evenly on the inner wall of the hydraulic expansion sleeve 1 along the circumference of the main shaft 3, thereby generating a uniform and stable radial clamping force. This is beneficial for smoother torque transmission and ensures that the preset torque slippage threshold remains consistent in the circumferential direction. It also ensures that the trigger point of the protection action is accurate and reliable, avoiding premature or uneven slippage caused by local stress concentration.

[0051] Placing the oil cavity 11 in the central region of the component thickness ensures that the deformation of the inner and outer walls of the hydraulic expansion sleeve 1 is more symmetrical and coordinated under hydraulic pressure, effectively reducing the risk of local buckling or excessive deformation. This symmetrical stress state improves stress distribution, giving it superior fatigue performance under high-cycle alternating loads, thereby ensuring the durability and reliability of the device under long-term, repeated overload protection conditions.

[0052] Furthermore, the relatively regular volume of the cylindrical oil chamber 11 facilitates the rapid establishment or release of pressure in the hydraulic system, meeting the system response speed requirements of the dynamic flight simulator. Simultaneously, the centrally symmetrical structure reduces the possibility of localized wear or leakage of the seals due to uneven deformation, further ensuring the long-term stability of the pressure in the oil chamber 11 and maintaining the accuracy of the torque protection function's preset value.

[0053] In one embodiment provided in this disclosure, the bearing assembly 5 includes a thrust bearing 51 and a radial bearing 52; the thrust bearing 51 is installed between the end face of the tapered sleeve 2 and the rotating arm 4; the radial bearing 52 is installed between the main shaft 3 and the hydraulic expansion sleeve 1.

[0054] The thrust bearing 51 is positioned along the path bearing the axial load, specifically between the end face of the tapered sleeve 2 and the rotating arm 4. It serves to bear and guide any axial forces and moments that may arise, preventing unintended axial movement of the rotating arm 4 relative to the main shaft 3. Simultaneously, the radial bearing 52 is precisely installed between the main shaft 3 and the hydraulic expansion sleeve 1, thereby defining the radial relative position between the rotating arm 4 (via the hydraulic expansion sleeve 1) and the main shaft 3, ensuring a stable coaxial relationship during slippage. Based on this arrangement, both bearings together constrain the degree of freedom of the rotating arm 4 to a single, smooth rotation about the axis of the main shaft 3, preventing vibration, swaying, or jamming that may occur after the loss of main drive, thus making the protective sliding process highly controllable.

[0055] In emergency situations where torque exceeds limits or hydraulic expansion sleeve 1 fails, the inertial rotation of the swing arm 4 is entirely supported by the thrust bearing 51 and the radial bearing 52. The rolling bearing can replace the possible metal-to-metal dry friction (for example, without the bearing, the inner hole of the swing arm 4 may directly scrape against the outer wall of the main shaft 3 or the surface of the tapered sleeve 2), converting sliding friction into rolling friction. This makes the triggering and execution of the protection action smoother and less resistant, reducing the energy loss required for the action. As a result, it effectively protects the mating surfaces of core transmission components such as the main shaft 3, tapered sleeve 2, and hydraulic expansion sleeve 1, ensuring that they are basically undamaged after a slippage event. After reset, the device can quickly restore its original transmission accuracy and function.

[0056] In this disclosure, the rotor of the rotary connector 6 is fixed to the top of the spindle 3 by fasteners 7, realizing the tight integration of the electrical connection unit and the mechanical transmission unit and the optimization of axial space. By utilizing the inherent structural space at the end of the spindle 3, the rotary connector 6 becomes part of the axial extension of the spindle 3, avoiding the need to add complex brackets or adapter structures for arranging electrical paths. This makes the layout of the entire device extremely compact and effectively reduces the axial dimension and overall complexity of the system.

[0057] Specifically, fastener 7 refers to fastening parts such as screws and bolts.

[0058] In one embodiment provided in this disclosure, the torque over-limit protection device further includes an anti-rotation rod 8, which is connected to the top of the rotary connector 6 and inserted into a corresponding socket. The anti-rotation rod 8 provides a defined and reliable circumferential positioning for the rotor of the rotary connector 6. By connecting the upper end of the anti-rotation rod 8 to the top of the rotor and inserting its lower end into a fixed socket (e.g., fixed to a machine frame or stationary component), accidental and uncontrolled rotation of the rotor following the spindle 3 can be effectively prevented.

[0059] In this way, under normal operating conditions, although the spindle 3 drives the rotating arm 4 to rotate at high speed, the rotor of the rotary connector 6 can always remain stationary, thereby maintaining a normal and stable interface for the transmission of power and signals from the stationary end to the rotating end inside, thus preventing the rotor from undergoing unexpected minor rotations under vibration or inertia, and avoiding tangling or even damage to external cables.

[0060] Since the anti-rotation rod 8 does not rely on complex sensors or electronic locking devices, but achieves its anti-rotation function through the physical constraint of rigid rods, it has strong anti-interference capabilities and is not sensitive to harsh electromagnetic or vibration environments, meeting the requirements of high-reliability special equipment. At the same time, the plug-in connection method facilitates precise alignment and fixation during installation and commissioning, and allows for easy removal when necessary (such as for maintenance and replacement of the rotary connector), achieving a good combination of functional reliability and maintenance convenience.

[0061] Furthermore, the rotary connector 6 has a radially extending extension plate 62 at its top, and the anti-rotation rod 8 is vertically positioned and connected to the extension plate 62. Connecting the anti-rotation rod 8 to the extension plate 62, which extends radially from the top of the rotor, instead of directly connecting it to the center of the rotor's top, effectively increases the distance between the fixing point of the anti-rotation rod 8 and the axis of the main shaft 3, thus increasing the lever arm length. Therefore, when the rotor of the rotary connector 6 is subjected to a torque that causes it to rotate, the structure of the anti-rotation rod 8 and the extension plate 62 can resist this torque with less internal stress, reducing stress concentration at the connection point and thereby improving the overall rigidity and fatigue resistance of the anti-rotation structure.

[0062] Furthermore, the radially extending extension plate 62 provides the operator with a wide, more accessible operating plane away from the center of the spindle 3. When installing the anti-rotation rod 8, its position can be easily adjusted, drilled, or tightened on this plane, ensuring that the anti-rotation rod 8 can be accurately aligned and smoothly inserted into the corresponding socket. Subsequent maintenance also facilitates the inspection and disassembly of the anti-rotation rod 8 and the rotary connector 6, effectively improving the maintainability and assembly process of the equipment.

[0063] In one embodiment, the hydraulic expansion sleeve 1 is fixedly connected to the rotating arm 4 by bolts 9; wherein, multiple bolts 9 are provided and are evenly spaced along the circumferential direction of the hydraulic expansion sleeve 1.

[0064] Multiple bolts 9 are evenly arranged along the circumference, generating a uniformly distributed preload on the mating surface. This ensures that the flange end face of the hydraulic expansion sleeve 1 fits tightly against the mounting surface of the swing arm 4, forming a robust mechanical unit. This connection method can reliably withstand and transmit complex composite loads generated by enormous centrifugal inertial forces and working torques, avoiding loosening, displacement, or fretting wear caused by insufficient connection strength or uneven stress. It provides a stable structural foundation for torque transmission and protection functions.

[0065] The uniform circumferential preload ensures that when the hydraulic expansion sleeve 1 expands slightly radially under internal oil pressure, its flange end face can still maintain uniform contact and pressure balance with the mounting surface of the swing arm 4, preventing local warping or gaps, and helping to ensure the effectiveness of other related sealing interfaces (such as the end seal of the oil cavity 11), preventing the risk of leakage due to uneven deformation.

[0066] It should be noted that the bolt 9 connection is a standardized and modular mechanical connection method. When it is necessary to replace the hydraulic expansion sleeve 1, perform calibration maintenance, or repair the internal bearings, simply remove this ring of bolts 9 in sequence to separate the entire torque protection module (including the expansion sleeve, bearings, etc.) from the swing arm 4 without damaging or cutting the main structural components. This makes the inspection, replacement, and functional reset of components efficient and economical, reduces the total life-cycle maintenance cost of the equipment, and improves the flexibility of equipment use.

[0067] In one embodiment, the rotary connector 6 is a conductive slip ring, with its rotor fixed to the end of the main shaft 3. The conductive slip ring, through the sliding contact between its internal brush and the conductive ring, enables continuous power and signal transmission between two relatively rotating components. This technology is mature and reliable, fully meeting the stringent requirements of dynamic flight simulators for the durability and stability of electrical connections under high-speed and high-vibration conditions. By fixing its rotor to the end of the main shaft 3, the stationary side (brush) of the slip ring is synchronized with the main shaft 3, while the rotating side (conductive ring) is connected to the rotating arm 4 via a cable. This ensures that when the main shaft 3 and the rotating arm 4 slide relative to each other, the slip ring can immediately and accurately respond and establish relative rotational motion between the dynamic and stationary interfaces, thus reliably maintaining the physical path of the electrical connection and preventing cable entanglement and breakage.

[0068] By directly mounting the conductive slip ring at the end of the main shaft 3, making it a natural extension of the drive shaft system, there is no need for additional complex conversion mechanisms and lengthy cable routing. This not only saves space and reduces potential electromagnetic interference paths, but also shortens the power and signal transmission distance from stationary equipment on the ground to rotating loads (such as instruments and actuators in the cockpit). This helps to reduce line loss, improve signal integrity, and enhance the simplicity and reliability of the overall system layout.

[0069] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0070] Finally, it should be noted that this invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products under the guidance of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention, which should be determined by the claims, and the specification can interpret the claims.

Claims

1. A torque over-limit protection device for the boom end of a dynamic flight simulator, characterized in that, include: A hydraulic expansion sleeve is fitted onto the main shaft and fixedly connected to the rotating arm. This hydraulic expansion sleeve is used to transmit torque within the rated torque range and to slide relative to the main shaft when the torque exceeds the limit. The tapered sleeve is interference-fitted with the main shaft, and its outer tapered surface presses against the tapered surface of the inner wall of the hydraulic expansion sleeve, thereby locking the transmission component of the hydraulic expansion sleeve to the main shaft; A bearing assembly is disposed between the main shaft and the rotating arm or the hydraulic expansion sleeve; A rotary connector, wherein the rotor is connected to the main shaft and the stator is connected to the rotating arm, to maintain the continuity of electrical connection when relative slippage occurs.

2. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 1, characterized in that, The hydraulic expansion sleeve has a sealed oil chamber inside that can be filled and drained with hydraulic oil.

3. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 2, characterized in that, The hydraulic expansion sleeve includes an integrally formed connecting body and a main body. The connecting body is connected to the rotating arm. The main body is provided with the oil cavity. The connecting body is provided with an oil injection hole communicating with the oil cavity and a screw plug for sealing the oil injection hole.

4. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 3, characterized in that, The upper end of the spindle is provided with a blade that is positioned opposite to the screw plug. This blade is used to cut off the screw plug when the driving torque exceeds the preset torque of the hydraulic expansion sleeve, so that the oil in the oil chamber can be discharged through the cut.

5. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 2, characterized in that, The oil cavity is cylindrical and is located in the central region of the hydraulic expansion sleeve along the thickness direction.

6. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 1, characterized in that, The bearing assembly includes a thrust bearing and a radial bearing; the thrust bearing is installed between the end face of the tapered sleeve and the rotating arm; the radial bearing is installed between the main shaft and the hydraulic expansion sleeve.

7. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 1, characterized in that, The rotor of the rotary connector is fixed to the top of the spindle by fasteners.

8. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 1, characterized in that, The torque over-limit protection device also includes an anti-rotation rod, which is connected to the top of the rotary connector and inserted into the corresponding socket.

9. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 8, characterized in that, The top of the rotary connector is provided with an extension plate that extends radially, and the anti-rotation rod is vertically arranged and connected to the extension plate.

10. The torque over-limit protection device for the boom end of a dynamic flight simulator according to claim 1, characterized in that, The hydraulic expansion sleeve is fixedly connected to the rotating arm by bolts; wherein, multiple bolts are provided and are evenly spaced along the circumference of the hydraulic expansion sleeve.

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