A large-scale space-switchable dual-mode slewing bearing device and an aircraft

Abstract

The present invention discloses a large-scale space switchable dual-mode slewing support device and an aircraft. The switchable dual-mode slewing support device includes: a cabin interface flange, on which a first rolling support assembly and a first switching locking mechanism are provided; a truss interface flange, on which a second rolling support assembly and a second switching locking mechanism are provided, and the truss interface flange can rotate relative to the cabin interface flange in both the main mode and the backup mode; a guide rail, which is provided between the cabin interface flange and the truss interface flange and cooperates with the first rolling support assembly and the second rolling support assembly, the first switching locking mechanism is used to unlock the guide rail in the main mode and lock the guide rail in the backup mode, and the second switching locking mechanism is used to lock the guide rail in the main mode and unlock the guide rail in the backup mode. The purpose is to solve the technical problems such as the low load-bearing capacity of the sun-directed drive mechanism, the high quality cost, the short on-orbit service life, and the inability to eliminate single-mode faults.

Description

Technical Field

[0001] The present application relates to the technical field of large-scale space solar orientation devices, and in particular to a large-scale space switchable dual-mode rotary support device. Background Art

[0002] The Large-Scale Space-Based Direction-of-Sun (LBS) is currently the largest solar-direction-of-Sun drive mechanism in China. Its primary function is to meet the requirements of high-power space power transmission, withstand the loads of the flexible solar array launch and on-orbit sections at the ends of the mechanism's truss, and drive the solar arrays for long-term, stable rotation in orbit. Because the LBS is significantly larger and heavier than traditional solar-direction-of-Sun drive mechanisms, it is difficult to replace the entire mechanism in orbit. Its long-term stable operation directly impacts the service life of large spacecraft and the success of the entire spacecraft system mission. A failure would cause immeasurable losses. In existing technologies, solar-direction mechanisms, due to their relatively low loads, can employ a stable and reliable "motor + reducer + bearing + load" transmission system, with the bearings acting as slewing support. However, due to the high load and lightweight design requirements of the LBS, the "large bearing" solution was discarded due to the high overall mass of the mechanism. Summary of the Invention

[0003] The purpose of the present invention is to provide a large-scale space-switchable dual-mode slewing support device, which solves the technical problems of the existing technology such as the small load-bearing capacity of the sun-directional driving mechanism, high mass cost, short on-orbit service life, and inability to eliminate single-mode faults.

[0004] In a first aspect, a large-scale space-switchable dual-mode slewing support device is provided, comprising:

[0005] A cabin interface flange, on which a first rolling support assembly and a first switching locking mechanism are provided;

[0006] a truss interface flange, on which a second rolling support assembly and a second switching locking mechanism are provided, and wherein the truss interface flange is capable of rotating relative to the cabin interface flange in both a main mode and a backup mode;

[0007] The guide rail is arranged between the cabin interface flange and the truss interface flange, and cooperates with the first rolling support assembly and the second rolling support assembly. The first switching locking mechanism is used to unlock the guide rail in the main mode and lock the guide rail in the standby mode. The second switching locking mechanism is used to lock the guide rail in the main mode and unlock the guide rail in the standby mode.

[0008] In combination with the first aspect, in certain implementations of the first aspect, a first driving component is provided on the cabin interface flange, and a second driving component is provided on the truss interface flange; in the main mode, the first driving component is used to drive the guide rail to rotate and drive the truss interface flange to rotate, and in the standby mode, the second driving component is used to drive the truss interface flange to rotate.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the first driving component includes a first driving gear, the second driving component includes a second driving gear, a first gear ring is provided on one side of the guide rail close to the cabin interface flange, the first gear ring meshes and drives with the first driving gear, a second gear ring is provided on one side of the guide rail close to the truss interface flange, and the second gear ring meshes and drives with the second driving gear;

[0010] In the main mode, the first driving gear performs a self-rotation motion to drive the guide rail to rotate and drive the truss interface flange to rotate;

[0011] In the standby mode, the second driving gear performs a self-rotation motion to drive the truss interface flange to rotate.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the first switching and locking mechanism includes a first locking arm, a second locking arm, a motor driving part and a main structure part;

[0013] The main structure part is provided on the cabin interface flange and bears the first locking arm, the second locking arm and the motor driving part; the motor driving part is used to drive the first locking arm and / or the second locking arm to deflect relative to the main structure part to adjust the clamping distance between the first locking arm and the second locking arm, so that the first locking arm and the second locking arm clamp both sides of the guide rail or perform unlocking of the guide rail.

[0014] In combination with the first aspect, in certain implementations of the first aspect, locking pieces are provided on both the first locking arm and the second locking arm, and the locking pieces of the first locking arm and the locking pieces of the second locking arm are respectively attached to or separated from the outer side surface and the inner side surface of the guide rail.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the first locking arm is connected to the main structure part through a first rotating support shaft, and the first locking arm can rotate relative to the main structure part through the first rotating support shaft; the second locking arm is connected to the main structure part through a second rotating support shaft, and the second locking arm can rotate relative to the main structure part through the second rotating support shaft.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the first rolling support assembly includes a first clamping arm, a second clamping arm and a bottom clamping arm, the guide rail includes an inner inclined surface, an outer inclined surface and a bottom end surface, the first clamping arm fits the inner inclined surface, the second clamping arm fits the outer inclined surface, and the bottom clamping arm fits the bottom end surface, so that the rolling support assembly clamps the guide rail.

[0017] In combination with the first aspect, in certain implementations of the first aspect, a plurality of the first rolling support assemblies are evenly arranged on the cabin interface flange, and a plurality of the second rolling support assemblies are evenly arranged on the truss interface flange.

[0018] In combination with the first aspect, in certain implementations of the first aspect, the plurality of first rolling support assemblies and the plurality of second rolling support assemblies are arranged one by one relative to each other.

[0019] In combination with the first aspect, in certain implementations of the first aspect, two of the first switching locking mechanisms are evenly arranged on the cabin interface flange, and two of the second switching locking mechanisms are evenly arranged on the truss interface flange, and the line connecting the two first switching locking mechanisms is perpendicular to the line connecting the two second switching locking mechanisms.

[0020] In combination with the first aspect, in certain implementations of the first aspect, in the main mode, at least one of the two second switching locking mechanisms locks the guide rail, and in the standby mode, at least one of the two first switching locking mechanisms locks the guide rail.

[0021] In a second aspect, an aircraft is provided, comprising a large-scale space-switchable dual-mode slewing support device as described in any one of the implementations of the first aspect.

[0022] Compared with the existing technology, the solution provided by this application includes at least the following beneficial technical effects:

[0023] 1. This invention achieves a lightweight design for a high-load-bearing slewing support, resolving the issue of excessive bearing mass in existing solutions that use large bearings as slewing support components. This invention employs multiple sets of circumferentially evenly distributed rolling support assemblies to jointly clamp the guide rails, providing rotational freedom for the guide rails while also bearing the loads at the cabin truss ends. This significantly reduces the mass of the mechanism compared to solutions using large bearings.

[0024] 2. The present invention realizes the design of a slewing bearing device with a switchable dual mode, solving the problem in the prior art that the slewing bearing component is a single point of the mechanism. The present invention adopts a dual mode mechanism design of "main rolling support assembly + guide rail" and "backup rolling support assembly + guide rail". The functions of each mode are the same, both equivalent to the slewing bearing function similar to a bearing. By respectively arranging multiple sets of switching and locking mechanisms between the truss interface flange and the guide rail, and between the cabin interface flange and the guide rail, the high-rigidity connection between the truss interface flange and the guide rail, and the switching of the high-rigidity connection between the cabin interface flange and the guide rail are realized, thereby realizing the free switching of the dual mode.

[0025] 3. The present invention realizes a significant improvement in the service life of the slewing bearing device, solving the problem in the prior art that the service life of moving parts is limited and cannot meet the requirements of long-term on-orbit operation. The present invention adopts a design scheme of a switchable dual mode mechanism. Compared with the single mode, theoretically, the on-orbit life of the former is twice that of the latter, thereby significantly improving the on-orbit service life of the device.

[0026] 4. The present invention realizes the redundant design at the component set level, further improving the overall reliability of the slewing bearing device and solving the problem in the prior art that there is no redundant backup for the slewing bearing component. In the present invention, 8 sets of main rolling support components are provided and are of a detachable design. Each set is redundantly designed with each other. When one set fails, it can be disassembled without affecting the normal function of the device. The present invention is provided with 2 sets of switching and locking mechanisms at the cabin interface flange and the truss interface flange respectively. The two sets are independent of each other and are redundant backups for each other. When the performance of one set of mechanisms deteriorates, the other set of mechanisms can be used to replace it to perform tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the front view of the slewing bearing device of the present invention.

[0028] Figure 2 It is the overall view of the slewing bearing device of the present invention.

[0029] Figure 3 It is the schematic diagram of the guide rail structure of the present invention.

[0030] Figure 4 It is the schematic diagram of the cross-sectional structure of the guide rail of the present invention.

[0031] Figure 5 It is the schematic diagram of the structure of the main rolling support assembly of the present invention.

[0032] Figure 6 It is the schematic diagram of the structure of the backup rolling support assembly of the present invention.

[0033] Figure 7 It is the schematic diagram of the installation of TBA and the guide rail of the present invention.

[0034] Figure 8 Schematic diagram of the open state of the clamping part of the rolling support assembly of the present invention.

[0035] Figure 9 Schematic diagram of the structure of the installation part of the rolling support assembly of the present invention.

[0036] Figure 10 Schematic diagram of the movement of the sliding table and the installation base of the installation part of the rolling support assembly of the present invention.

[0037] Figure 11 Schematic diagram of the structure of the switching locking mechanism of the present invention.

[0038] Figure 12 Schematic diagram of the combined installation (locked state) of the switching locking mechanism and the guide rail of the present invention.

[0039] Figure 13 Schematic diagram of the combined installation (unlocked state) of the switching locking mechanism and the guide rail of the present invention. Detailed implementation manners

[0040] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] To solve the problems existing in the background art, the present invention designs a solution for a slewing support device to meet the design requirements of the sun-pointing drive mechanism. In addition, to further improve the reliability of the large-scale space sun-pointing device and ensure stable long-term on-orbit operation, the present invention realizes the main-backup redundancy design in the mechanism scheme design, increases the comprehensive service life of the mechanical transmission part, and at the same time solves the problem of single-mode failure of the mechanism that may occur on orbit through mode switching, which has very important significance.

[0042] Please refer to Figure 1 and Figure 2 , a large-scale space switchable dual-mode slewing support device, the slewing support device includes a cabin interface flange 1, a guide rail 2, a truss interface flange 3, a primary rolling support assembly 4, a backup rolling support assembly 5, and a switching locking mechanism 6. The cabin interface flange 1 and the truss interface flange 3 are arranged opposite to each other and are respectively located on both sides of the guide rail 2. The primary rolling support assembly 4 is installed on the cabin interface flange 1 and cooperates with the side of the guide rail 2 facing the cabin interface flange 1. The backup rolling support assembly 5 is installed on the truss interface flange 3 and cooperates with the side of the guide rail 2 facing the truss interface flange 3. That is to say, the primary rolling support assembly 4 and the backup rolling support assembly 5 respectively clamp the upper and lower ends of the guide rail 2 (the up and down direction is Figure 1The directions shown on the drawing. In fact, this up-and-down relationship is only a relative relationship and does not represent an absolute up-and-down relationship). There are 8 sets of primary rolling support assemblies 4 and backup rolling support assemblies 5 respectively, which are evenly installed in a circumferential pattern. Part of the partial switching locking mechanism 6 is installed on the cabin interface flange 1, and part of the partial switching locking mechanism 6 is installed on the truss interface flange 3, which are radially symmetrically arranged and can all clamp the inner side surface 2-1 and the outer side surface 2-2 of the guide rail 2 (see Figure 4 ). In Figure 1 and Figure 2 In the illustrated embodiment, the connection lines of the two switching locking mechanisms 6 provided on the cabin interface flange 1 and the connection lines of the two switching locking mechanisms 6 provided on the truss interface flange 3 are perpendicular to each other.

[0043] Figure 3 and Figure 4 show a schematic structural diagram of a guide rail 2 provided by an embodiment of the present application. The guide rail 2 is an overall circular ring structure. The upper and lower ends are symmetric triangular structures in cross-section, including an inner inclined surface 2-3, an outer inclined surface 2-4, and an end surface 2-5. The middle cross-section of the guide rail 2 is a regular rectangle and can be divided into an inner side surface 2-1 and an outer side surface 2-2.

[0044] Figure 5 and Figure 6 show a schematic structural diagram of a rolling support assembly provided by an embodiment of the present application. This rolling support assembly can be the primary rolling support assembly 4 or the backup rolling support assembly 5. That is to say, the structures of the primary rolling support assembly 4 and the backup rolling support assembly 5 can be the same or substantially the same, that is, generally similar. The specific differences will be described in the following content.

[0045] The rolling support assembly may include a clamping portion 4-5-1 and a mounting portion 4-5-2.

[0046] The clamping portion 4-5-1 is used to clamp the upper and lower ends of the guide rail 2. Among them, the clamping portion 4-5-1 of the primary rolling support assembly 4 is used to clamp the lower end of the guide rail 2. The clamping portion 4-5-1 of the backup rolling support assembly 5 is used to clamp the upper end of the guide rail 2.

[0047] The mounting portion 4-5-2 is used to be mounted on the flange. Among them, the mounting portion 4-5-2 of the primary rolling support assembly 4 is used to be fixedly connected to the cabin interface flange 1. The mounting portion 4-5-2 of the backup rolling support assembly 5 is used to be fixedly connected to the truss interface flange 3. In addition, the mounting portion 4-5-2 of the primary rolling support assembly 4 can be a detachable structure, such as Figure 5 shown; the backup rolling support assembly 5 can be a non-detachable structure, such as Figure 6 shown. In other embodiments, the primary rolling support assembly 4 can also be a non-detachable structure; the backup rolling support assembly 5 can also be a detachable structure.

[0048] The clamping part 4-5-1 includes a main clamping arm 4-5-3, a secondary clamping arm 4-5-4 and a bottom clamping arm 4-5-5. The bottom clamping arm 4-5-5 is fixed to the mounting part 4-5-2. Both the main clamping arm 4-5-3 and the secondary clamping arm 4-5-4 can be connected to the mounting part 4-5-2 through a pin shaft 4-5-6, so that both the main clamping arm 4-5-3 and the secondary clamping arm 4-5-4 can rotate around the pin shaft 4-5-6. In Figure 6 In the illustrated embodiment, the pin shaft 4-5-6 can pass through the through hole on the mounting part 4-5-2, and the end can extend to the through hole on the bottom clamping arm 4-5-5.

[0049] Figure 7 The assembly schematic diagram of the main rolling support assembly 4 and the backup rolling support assembly 5 with the guide rail 2 is shown. Combining Figures 4 to 7 , the main clamping arm 4-5-3, the secondary clamping arm 4-5-4 and the bottom clamping arm 4-5-5 respectively cooperate with the outer inclined surface 2-4, the inner inclined surface 2-3 and the end surface 2-5 of the guide rail 2. Each clamping arm is provided with a freely rotatable roller assembly 4-5-7. A freely rotatable roller 4-5-71 is arranged inside the roller assembly 4-5-7. The rotating shaft of the roller 4-5-71 can be arranged parallel to the surface of the guide rail 2 that cooperates with the roller 4-5-71. In Figure 5 In the illustrated embodiment, the roller assembly 4-5-7 and the main clamping arm 4-5-3 or the secondary clamping arm 4-5-4 can be fixedly connected through a pin shaft, so as to facilitate fine-tuning the inclination angle of the rotating shaft of the roller 4-5-71.

[0050] The roller 4-5-71 of the main clamping arm 4-5-3 can roll relatively on the outer inclined surface 2-4 as the guide rail 2 rotates, the roller 4-5-71 of the secondary clamping arm 4-5-4 can roll relatively on the inner inclined surface 2-3 as the guide rail 2 rotates, and the roller 4-5-71 of the bottom clamping arm 4-5-5 can roll relatively on the end surface 2-5 as the guide rail 2 rotates, so as to provide the rotational freedom of the guide rail 2 and play a role in clamping and supporting the guide rail 2. The rotational freedom of the roller 4-5-71 assembly can adapt to the micro-changes of the angles of each surface of the guide rail 2 during the operation process, ensuring good contact between the outer ring surface of the roller 4-5-71 and the surface of the guide rail 2.

[0051] The main rolling support assembly 4 and the backup rolling support assembly 5 are respectively arranged at the upper and lower ends of the guide rail 2, and the two clamp the guide rail 2 independently. Whether the main mode rotational movement between the main rolling support assembly 4 and the guide rail 2 is normal does not affect the backup mode rotational movement between the backup rolling support assembly 5 and the guide rail 2, and vice versa, that is, the main and backup mode rotational movements do not interfere with each other.

[0052] In Figure 5In the illustrated embodiment, the main clamping arm 4-5-3 and the secondary clamping arm 4-5-4 can be connected by a clamping bolt 4-5-8. By tightening the clamping bolt 4-5-8, the distance between the main clamping arm 4-5-3 and the secondary clamping arm 4-5-4 can be restricted. Specifically, when the roller 4-5-71 of the bottom clamping arm 4-5-5 abuts against the end face 2-5 of the guide rail 2, the roller 4-5-71 of the main clamping arm 4-5-3 can be in contact with the outer inclined surface 2-4 of the guide rail 2, and the roller 4-5-71 of the secondary clamping arm 4-5-4 can be in contact with the inner inclined surface 2-3 of the guide rail 2, forming a stable clamping state.

[0053] Figure 8 Fig. shows a schematic structural diagram of the state after the clamping bolt 4-5-8 is loosened. After loosening and disconnecting the clamping bolt 4-5-8 from the secondary clamping arm 4-5-4, the secondary clamping arm 4-5-4 can rotate around the pin shaft 4-5-6, making the clamping part 4-5-1 in an open state.

[0054] Please refer to Figure 2 , Figure 5 , Figure 9 , Figure 10 , the mounting part 4-5-2 of the main rolling support assembly 4 can be divided into a slide table 4-5-21, a transmission lead screw 4-5-22, and a mounting base 4-5-23. The slide table 4-5-21 and the transmission lead screw 4-5-22 are relatively fixed in position, and the transmission lead screw 4-5-22 can rotate freely in the slide table 4-5-21. The slide table 4-5-21 is pushed into and out of the mounting base 4-5-23 through the transmission lead screw 4-5-22, realizing the overall disassembly and assembly of the slide table 4-5-21 together with the open clamping part 4-5-1, that is, realizing the on-orbit disassembly and assembly of a single set of the main rolling support assembly 4.

[0055] Please refer to Figure 2 , Figures 11 to 13 , the switching locking mechanism 6 includes a main locking arm 6-1, a secondary locking arm 6-2, a motor drive part 6-3, and a main structure part 6-4. The main structure part 6-4 provides a connection mechanical interface between the switching locking mechanism 6 and the cabin interface flange 1 or the truss interface flange 3. The main locking arm 6-1 and the secondary locking arm 6-2 are connected to the main structure part 6-4 through a rotary support shaft 6-5 and can rotate around the rotary support shaft 6-5. A locking piece 6-6 is installed at the end of both the main locking arm 6-1 and the secondary locking arm 6-2. Combining Figure 4 and Figure 11 , the locking piece 6-6 of the main locking arm 6-1 and the locking piece 6-6 of the secondary locking arm 6-2 are respectively in contact with or separated from the outer side surface 2-2 and the inner side surface 2-1 of the guide rail 2. The motor drive part 6-3 is installed on the main structure part 6-4 and is connected to the main locking arm 6-1 and the secondary locking arm 6-2 to form a linkage mechanism. As Figure 12 and Figure 13As shown, the operation of the motor drive part 6-3 can drive the main locking arm 6-1 and the secondary locking arm 6-2 to lock or unlock the guide rail 2 together.

[0056] Each set of switching and locking mechanism 6 can independently lock and unlock the guide rail 2. When the switching and locking mechanism 6 at the end of the truss interface flange 3 locks the guide rail 2, a high-rigidity connection is formed between the truss interface flange 3 and the guide rail 2. When the switching and locking mechanism 6 at the end of the truss interface flange 3 unlocks the guide rail 2, there is no constraint between the truss interface flange 3 and the guide rail 2. Similarly, when the switching and locking mechanism 6 at the end of the cabin interface flange 1 locks the guide rail 2, a high-rigidity connection is formed between the cabin interface flange 1 and the guide rail 2. When the switching and locking mechanism 6 at the end of the cabin interface flange 1 unlocks the guide rail 2, there is no constraint between the cabin interface flange 1 and the guide rail 2. By adjusting the combination form of the switching and locking mechanism 6 to lock / unlock the guide rail 2, the switching between the high-rigidity connection of the guide rail 2 and the truss interface flange 3 and the high-rigidity connection of the guide rail 2 and the cabin interface flange 1 is realized.

[0057] The working principle provided by the embodiments of the present application is introduced below. The cabin interface flange 1, the primary rolling support assembly 4, the switching and locking mechanism 6 at the end of the cabin interface flange 1 and the end of the guide rail 2 close to the cabin interface flange 1 constitute the primary mode. The truss interface flange 3, the backup rolling support assembly 5, the switching and locking mechanism 6 at the end of the truss interface flange 3 and the end of the guide rail 2 close to the truss interface flange 3 constitute the backup mode.

[0058] When operating in the single-primary mode or single-backup mode in orbit, the cabin interface flange 1 can be regarded as fixed relative to the cabin, and the truss interface flange 3 can be regarded as axially rotating relative to the cabin. That is to say, the end of the truss interface flange 3 can be a rotating body, and the end of the cabin interface flange 1 can be a stationary body. For example, a load outside the cabin can be provided on the truss interface flange 3. A primary drive source is provided on the cabin interface flange 1 for driving the rotation of the guide rail 2. A backup drive source is provided on the truss interface flange 3 for driving the rotation of the truss interface flange 3.

[0059] Combined with Figure 4 , on the inner side of the lower end of the guide rail 2 (i.e., the end cooperating with the cabin interface flange 1), a primary gear ring 2-7 is provided. The primary drive source on the cabin interface flange 1 can be a primary drive gear, and the primary drive gear can mesh with the primary gear ring 2-7. On the inner side of the upper end of the guide rail 2 (i.e., the end cooperating with the truss interface flange 3), a backup gear ring 2-8 is provided. The backup drive source on the cabin interface flange 1 can be a backup drive gear, and the backup drive gear can mesh with the backup gear ring 2-8.

[0060] When operating in the single-master mode in orbit, the two sets of switching and locking mechanisms 6 at the flange 1 end of the cabin interface are both in the unlocked state, and at least one of the two sets of switching and locking mechanisms 6 at the flange 3 end of the truss interface is in the locked state. Under the driving action of the main driving gear, the main gear ring 2-7 of the guide rail 2 can rotate, and then drive the guide rail 2 to rotate. Therefore, the guide rail 2 rotates relative to the main rolling support assembly 4 on the side of the cabin interface flange 1, and the main rolling support assembly 4 on the cabin interface flange 1 can support the guide rail. The connection between the truss interface flange 3 and the guide rail 2 is of high stiffness, and the truss interface flange 3 can rotate under the drive of the guide rail 2 through the backup rolling support assembly 5.

[0061] When operating in the single-master mode in orbit, the guide rail 2, the truss interface flange 3, and the switching and locking mechanisms 6 and the backup rolling support assembly 5 installed thereon can rotate relative to the cabin, while the cabin interface flange 1 and the switching and locking mechanisms 6 and the main rolling support assembly 4 installed thereon can remain stationary relative to the cabin, so as to realize the mutual rolling transmission between the main rolling support assembly 4 and the guide rail 2 by the guide rail 2 surface at the flange 1 end of the cabin interface.

[0062] When operating in the single-backup mode in orbit, the two sets of switching and locking mechanisms 6 at the flange 3 end of the truss interface are both in the unlocked state, and at least one of the two sets of switching and locking mechanisms 6 at the flange 1 end of the cabin interface is in the locked state. The connection between the cabin interface flange 1 and the guide rail 2 is of high stiffness, and there is no relative rotational movement between the main rolling support assembly 4 on the side of the cabin interface flange 1 and the guide rail 2. The backup driving gear can revolve on the backup gear ring 2-8 of the guide rail 2 under the driving action of the self-rotation movement. The truss interface flange 3 is fixedly connected to the backup driving gear. Therefore, there is a relative rotational movement between the main rolling support assembly 4 on the side of the truss interface flange 3 and the guide rail 2, and it plays a supporting role.

[0063] When operating in the single-backup mode in orbit, the guide rail , the cabin interface flange 1, and the switching and locking mechanisms 6 and the main rolling support assembly 4 installed thereon can remain stationary relative to the cabin, while the truss interface flange 3 and the switching and locking mechanisms 6 and the backup rolling support assembly 5 installed thereon can rotate relative to the cabin, so as to realize the mutual rolling transmission between the backup rolling support assembly 5 and the guide rail 2 by the guide rail 2 surface at the flange 3 end of the truss interface.

[0064] During the launch stage, the switching and locking mechanisms 6 at both ends of the cabin interface flange 1 and the truss interface flange 3 are in the locked state. The cabin interface flange 1 is highly rigidly connected to the guide rail 2, and the truss interface flange 3 is highly rigidly connected to the guide rail 2. There is no relative rotational movement between the guide rail 2 and the primary rolling support assembly 4 and the backup rolling support assembly 5. The switching and locking mechanism 6, the primary rolling support assembly 4, and the backup rolling support assembly 5 jointly bear the load during the ascending stage of the device. After entering orbit, which set of switching and locking mechanisms 6 to unlock is determined according to the selected operating mode. If the primary mode is selected for operation, the two sets of switching and locking mechanisms 6 at the end of the cabin interface flange 1 are unlocked, and at least one of the two sets of switching and locking mechanisms 6 at the end of the truss interface flange 3 is kept in the locked state. If the backup mode is selected for operation, the two sets of switching and locking mechanisms 6 at the end of the truss interface flange 3 are unlocked, and at least one of the two sets of switching and locking mechanisms 6 at the end of the cabin interface flange 1 is kept in the locked state.

[0065] When switching between the primary and backup modes, after the primary drive gear or the backup drive gear stops rotating, due to the tooth meshing relationship, the truss interface flange 3, the guide rail 2, and the cabin interface flange 1 are all in a relatively stationary state. If switching from the primary mode to the backup mode, at least one of the two sets of switching and locking mechanisms 6 at the end of the cabin interface flange 1 is locked, and the two sets of switching and locking mechanisms 6 at the end of the truss interface flange 3 are unlocked. If switching from the backup mode to the primary mode, at least one of the two sets of switching and locking mechanisms 6 at the end of the truss interface flange 3 is locked, and the two sets of switching and locking mechanisms 6 at the end of the cabin interface flange 1 are unlocked.

[0066] In summary, the present invention provides a large-scale space-switchable dual-mode slewing bearing device. The slewing bearing device includes a cabin interface flange, a guide rail, a truss interface flange, a primary rolling support assembly, a backup rolling support assembly, and a switching and locking mechanism. The primary rolling support assembly is installed on the cabin interface flange, and the backup rolling support assembly is installed on the truss interface flange. There are 8 sets each of the primary rolling support assembly and the backup rolling support assembly, which are evenly distributed circumferentially. The two ends of the guide rail are respectively clamped between the primary rolling support assembly and the backup rolling support assembly. Part of the switching and locking mechanism is installed on the cabin interface flange, and part of the switching and locking mechanism is installed on the truss interface flange, which are radially symmetrically arranged and clamp the inner and outer sides of the guide rail. When the switching and locking mechanism at the end of the truss interface flange locks the guide rail, the truss interface flange and the guide rail form a high-rigidity connection. When the switching and locking mechanism at the end of the cabin interface flange locks the guide rail, the cabin interface flange and the guide rail form a high-rigidity connection. By adjusting the combination form of locking / unlocking the guide rail by the switching and locking mechanism, the switching between the rigid connection of the guide rail and the truss interface flange and the rigid connection of the guide rail and the cabin interface flange is achieved.

[0067] Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined by the claims of the present invention.

Claims

1. A large-scale spatial switchable dual-mode slewing bearing device, characterized in that Comprising: A cabin interface flange (1), on which a first rolling support assembly (4) and a first switching and locking mechanism are provided; A truss interface flange (3), on which a second rolling support assembly (5) and a second switching and locking mechanism are provided, and the truss interface flange (3) can rotate relative to the cabin interface flange (1) in both the main mode and the standby mode; A guide rail (2), which is arranged between the cabin interface flange (1) and the truss interface flange (3) and cooperates with the first rolling support assembly (4) and the second rolling support assembly (5). The first switching and locking mechanism is used to unlock the guide rail (2) in the main mode and lock the guide rail (2) in the standby mode. The second switching and locking mechanism is used to lock the guide rail (2) in the main mode and unlock the guide rail (2) in the standby mode.

2. The large-scale space-switchable dual-mode slewing bearing device according to claim 1, characterized in that, A first driving assembly is provided on the cabin interface flange (1), and a second driving assembly is provided on the truss interface flange (3); in the main mode, the first driving assembly is used to drive the guide rail (2) to rotate and drive the truss interface flange (3) to rotate, and in the standby mode, the second driving assembly is used to drive the truss interface flange (3) to rotate.

3. The large-space switchable dual-mode slewing bearing device according to claim 2, wherein The first driving assembly includes a first driving gear, and the second driving assembly includes a second driving gear. A first gear ring (2-7) is arranged on one side of the guide rail (2) close to the cabin interface flange (1), and the first gear ring (2-7) meshes with the first driving gear for transmission. A second gear ring (2-8) is arranged on one side of the guide rail (2) close to the truss interface flange (3), and the second gear ring (2-8) meshes with the second driving gear for transmission; In the main mode, the first driving gear performs a self-rotation movement to drive the guide rail (2) to rotate and drive the truss interface flange (3) to rotate; In the standby mode, the second driving gear performs a self-rotation movement to drive the truss interface flange (3) to rotate.

4. The large-scale space-switchable dual-mode slewing bearing device according to claim 1, characterized in that, The first switching and locking mechanism (6) includes a first locking arm (6-1), a second locking arm (6-2), a motor driving part (6-3) and a main structure part (6-4); The main structure part (6-4) is arranged on the cabin interface flange (1) and bears the first locking arm (6-1), the second locking arm (6-2) and the motor driving part (6-3); the motor driving part (6-3) is used to drive the first locking arm (6-1) and / or the second locking arm (6-2) to deflect relative to the main structure part (6-4) to adjust the clamping distance between the first locking arm (6-1) and the second locking arm (6-2), so that the first locking arm (6-1) and the second locking arm (6-2) clamp both sides of the guide rail (2) or perform unlocking of the guide rail (2).

5. The large-space switchable dual-mode slewing bearing device according to claim 4, characterized in that, Both the first locking arm (6-1) and the second locking arm (6-2) are provided with locking pieces (6-6), and the locking pieces (6-6) of the first locking arm (6-1) and the locking pieces (6-6) of the second locking arm (6-2) are respectively in contact with or separated from the outer side surface and the inner side surface of the guide rail (2).

6. The large-space switchable dual-mode slewing bearing device according to claim 4 or 5, characterized in that, The first locking arm (6-1) and the main structure part (6-4) are connected by a first rotating support shaft, and the first locking arm (6-1) can rotate relative to the main structure part (6-4) through the first rotating support shaft; the second locking arm (6-2) and the main structure part (6-4) are connected by a second rotating support shaft, and the second locking arm (6-2) can rotate relative to the main structure part (6-4) through the second rotating support shaft.

7. The large-space switchable dual-mode slewing bearing device according to claim 1, wherein The first rolling support assembly (4) includes a first clamping arm (4-5-3), a second clamping arm (4-5-4) and a bottom clamping arm (4-5-5). The guide rail (2) includes an inner inclined surface (2-3), an outer inclined surface (2-4) and a bottom end surface (2-5). The first clamping arm (4-5-3) is in contact with the inner inclined surface (2-3), the second clamping arm (4-5-4) is in contact with the outer inclined surface (2-4), and the bottom clamping arm (4-5-5) is in contact with the bottom end surface (2-5) so that the rolling support assembly clamps the guide rail (2).

8. The large-space switchable dual-mode slewing bearing device according to claim 1, characterized in that A plurality of the first rolling support assemblies (4) are uniformly arranged on the cabin interface flange (1), and a plurality of the second rolling support assemblies (5) are uniformly arranged on the truss interface flange (3).

9. The large-space switchable dual-mode slewing bearing device according to claim 8, wherein A plurality of the first rolling support assemblies (4) and a plurality of the second rolling support assemblies (5) are arranged opposite to each other one by one.

10. The large-space switchable dual-mode slewing bearing device according to claim 1, characterized in that, Two of the first switching and locking mechanisms are uniformly arranged on the cabin interface flange (1), and two of the second switching and locking mechanisms are uniformly arranged on the truss interface flange (3). The connection line of the two first switching and locking mechanisms is perpendicular to the connection line of the two second switching and locking mechanisms.

11. The large-space switchable dual-mode slewing bearing device according to claim 10, characterized in that, In the main mode, at least one of the two second switching and locking mechanisms locks the guide rail (2), and in the standby mode, at least one of the two first switching and locking mechanisms locks the guide rail (2).

12. An aircraft, characterized in that, The aircraft includes the large-space switchable dual-mode slewing support device according to any one of claims 1 to 11.

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