Supporting structure of tilting nacelle
By designing the limiting mechanism of the tilt shaft and the support member, the problem of unstable load transmission in different flight attitudes of tilt rotor electric vertical take-off and landing vehicles is solved, and the stable load transmission and the stability of the aircraft are achieved.
Patent Information
- Application Number
- CN202422487123.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-15
AI Technical Summary
The tilt nacelles of existing tilt rotor electric vertical take-off and landing vehicles are difficult to transfer load stably under different flight attitudes.
A support structure including a tilt shaft, a support member and a limiting mechanism is designed. Through the combination of the outer and inner support structures, the axial displacement and circumferential fixed angle rotation of the bearing are restricted to achieve stable load transmission.
It can transfer load stably under different flight attitudes, ensuring the stability and reliability of electric vertical take-off and landing vehicles.
Smart Images
Figure CN223148688U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of aircrafts, in particular to a support structure for a tilting nacelle. Background Art
[0002] At present, the configurations of EVTOL (electric vertical take-off and landing aircraft) mainly include multi-rotor configuration, compound wing configuration and tilt-rotor configuration. The advantage of the multi-rotor configuration is that the design is relatively simple, while the disadvantages are low cruise speed, short range and low payload; compared with the compound wing configuration, the tilt-rotor configuration has a higher thrust-to-weight ratio and higher aerodynamic efficiency, so more aircraft enterprises choose the tilt-rotor structure.
[0003] The tilting mechanisms adopted by tilt-rotor type electric vertical take-off and landing aircrafts are different in design, including rotor tilting, tilting nacelle, tilting wing, tilting duct, etc. For the design of the tilting nacelle, since the tilting nacelle will generate loads and torques in multiple directions during the flight of the electric vertical take-off and landing aircraft in different attitudes, therefore, aiming at the load transfer characteristics of the tilting nacelle in different attitude flights, it is urgent to design a support structure for the tilting nacelle that can stably transfer loads with the conversion of flight attitudes. Summary of the Utility Model
[0004] The utility model provides a support structure for a tilting nacelle, which includes a tilting shaft (1) and at least one support member sleeved on the tilting shaft. The support member includes a bearing, a tilting rib plate and a limiting mechanism. The bearing is sleeved on the tilting shaft, the tilting rib plate is installed on the bearing, and the limiting mechanism is installed in the middle of the tilting rib plate. The limiting mechanism includes at least one limiting ring sleeved on the tilting shaft to limit the axial displacement of the bearing.
[0005] The support structure for a tilting nacelle as described above, wherein the support member includes an outer support structure (2) and an inner support structure (3). The outer support structure (2) is installed at the end of the tilting shaft (1), and the inner support structure (3) is installed in the middle section of the tilting shaft (1).
[0006] The support structure for a tilting nacelle as described above, wherein the outer support structure (2) includes an outer bearing (21), an outer tilting rib plate (22) and an outer limiting mechanism (23). The outer bearing (21) is sleeved at the end of the tilting shaft (1), the outer tilting rib plate (22) is installed on the outer bearing (21), the outer limiting mechanism (23) is fixedly connected to the middle of the outer tilting rib plate (22), the outer limiting mechanism (23) is sleeved on the tilting shaft (1), and the outer limiting mechanism (23) and the tilting shaft (1) are provided with rotatable limiting components that cooperate with each other.
[0007] A support structure for a tilting nacelle as described above, wherein the outer limiting mechanism (23) includes a locking nut (232), and the outer bearing (21) is connected and locked to the end of the tilting shaft (1) through the locking nut (232).
[0008] A support structure for a tilting nacelle as described above, wherein the outer limiting mechanism (23) includes an outer bearing inner retaining ring (231) installed on the side close to the inner support structure (3), and the outer bearing inner retaining ring (231) is fixedly connected to the outer tilting rib plate (22).
[0009] A support structure for a tilting nacelle as described above, wherein a convex portion (2313) and a limiting slot (2314) are provided on the inner side of the outer bearing inner retaining ring (231), the convex portion (2313) protrudes towards the tilting shaft (1), and when the outer bearing inner retaining ring (231) is locked with the tilting shaft (1), the convex portion (2313) is in close contact with the tilting shaft (1).
[0010] A support structure for a tilting nacelle as described above, wherein the outer limiting mechanism (23) and the tilting shaft (1) are provided with rotatable limiting components that cooperate with each other, including: a limiting block (11) is provided on the tilting shaft (1), the limiting block (11) cooperates with the limiting slot (2314), and when the tilting shaft (1) rotates, the limiting block (11) is driven to rotate in the limiting slot (2314).
[0011] A support structure for a tilting nacelle as described above, wherein the inner support structure (3) includes an inner bearing (31), an inner tilting rib plate (32) and an inner limiting mechanism (33), the inner bearing (31) is sleeved on the middle part of the tilting shaft (1), the inner tilting rib plate (32) is installed on the inner bearing (31), the inner limiting mechanism (33) is connected to the middle part of the inner tilting rib plate (32), and the inner limiting mechanism (33) is sleeved on the tilting shaft (1).
[0012] A support structure for a tilting nacelle as described above, wherein the inner limiting mechanism (33) includes an inner bearing outer retaining ring (331), an inner bearing inner retaining ring (332) and a tilting shaft holding retaining ring (333), the inner bearing outer retaining ring (331) is installed on the side close to the outer support structure (2), the inner bearing inner retaining ring (332) and the tilting shaft holding retaining ring (333) are installed on the side far from the outer support structure (2); the inner bearing outer retaining ring (331) and the inner bearing inner retaining ring (332) are bolted to the inner tilting rib plate (32); the tilting shaft holding retaining ring (333) is fixedly connected to the tilting shaft (1).
[0013] A support structure for a tilting nacelle as described above, wherein the limiting ring is a pair of semi-circular structures, and both ends of the semi-circular structures are sleeved on the tilting shaft (1) through locking bolts.
[0014] The beneficial effects achieved by the present utility model are as follows: The present utility model can achieve the nacelle tilting of the tilt aircraft, enabling the electric vertical takeoff and landing aircraft to stably transmit loads in different flight postures. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.
[0016] Figure 1 and Figure 2 are the axonometric views of the tilt support structure in different directions provided by the embodiments of the present utility model;
[0017] Figure 3 is the sectional view of the tilt support structure along the axial direction of the tilt axis;
[0018] Figure 4 is the enlarged view of the outer support structure;
[0019] Figure 5 is the enlarged view of the inner support structure;
[0020] Figure 6 is the disassembled view of the tilt support structure;
[0021] Figure 7 is the circumferential rotation limiting structure between the inner ring of the outer bearing and the tilt axis.
[0022] Reference numerals:
[0023] 1, tilt axis; 2, outer support structure; 3, inner support structure; 21, outer bearing; 22, outer tilt rib plate; 23, outer limiting mechanism; 231, outer bearing inner retaining ring; 232, lock nut; 2311, outer bearing inner retaining half-ring one; 2312, outer bearing inner retaining half-ring two; 2313, protruding part; 2314, limiting card slot; 31, inner bearing; 32, inner tilt rib plate; 33, inner limiting mechanism; 331, outer retaining ring of the inner bearing; 332, inner retaining ring of the inner bearing; 333, tilt axis holding ring; 3311, outer retaining half-ring one of the inner bearing; 3312, outer retaining half-ring two of the inner bearing; 3331, tilt axis holding half-ring one; 3332, tilt axis holding half-ring two; 211, outer bearing dust cover; 311, inner bearing dust cover. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] Combined with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present utility model.
[0025] Embodiment
[0026] The present utility model provides a support structure for a tilting nacelle. The support structure includes a tilting shaft and at least one support member sleeved on the tilting shaft. The support member includes a bearing, a tilting rib plate, and a limiting mechanism. The bearing is sleeved on the tilting shaft, the tilting rib plate is installed on the bearing, and the limiting mechanism is installed in the middle of the tilting rib plate. The limiting mechanism includes at least one limiting ring sleeved on the tilting shaft to limit the axial displacement of the bearing. In the support structure provided by the embodiment of the present utility model, there can be only one support member, that is, the tilting shaft plus a single support rib is adopted. When the tilting shaft rotates, it drives the support member to rotate, and the tilting of the tilting nacelle can be realized.
[0027] Furthermore, the support structure provided by the present utility model can also adopt the tilting shaft plus double support ribs to enable the electric vertical takeoff and landing aircraft to stably transmit loads in different flight postures. As Figures 1 to 7 shown, the support member includes an outer support structure 2 and an inner support structure 3. The outer support structure 2 is installed at the outer end of the tilting shaft 1, and the inner support structure 3 is installed in the middle section of the tilting shaft 1. The outer support structure 2 includes an outer bearing 21, an outer tilting rib plate 22, and an outer limiting mechanism 23. The outer bearing 21 is sleeved on the end of the tilting shaft 1, the outer tilting rib plate 22 is installed on the outer bearing 21, and the outer limiting mechanism 23 is bolted in the middle of the outer tilting rib plate 22 and sleeved on the tilting shaft 1. The outer limiting mechanism 23 and the tilting shaft 1 are provided with mutually cooperating rotatable limiting components to limit the axial displacement and circumferential fixed-angle rotation of the outer bearing 21. The inner support structure 3 includes an inner bearing 31, an inner tilting rib plate 32, and an inner limiting mechanism 33. The inner bearing 31 is sleeved on the middle of the tilting shaft 1, the inner tilting rib plate 32 is installed on the inner bearing 31, and the inner limiting mechanism 33 is bolted in the middle of the inner tilting rib plate 32 and sleeved on the tilting shaft 1. The inner limiting mechanism 33 limits the axial displacement of the inner bearing 31.
[0028] See Figure 4, the outer limiting mechanism 23 includes an outer bearing inner retaining ring 231 and a locking nut 232. The outer bearing 21 is connected and locked to the end of the tilting shaft 1 through the locking nut 232 to prevent the outer bearing 21 from falling off; the outer bearing inner retaining ring 231 is installed on the side close to the inner support structure 3 and is bolted to the outer tilting rib plate 22.
[0029] See Figure 6 , the outer bearing inner retaining ring 231 includes an outer bearing inner half ring one 2311 and an outer bearing inner half ring two 2312. The outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312 are a pair of semi-circular ring structures, and both ends are sleeved on the tilting shaft 1 through locking bolts to prevent the outer bearing 21 from axially falling off and facilitate installation and disassembly.
[0030] See Figure 7 , limiting components are provided on the inner sides of both the outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312. The limiting components include a convex portion 2313 and a limiting card slot 2314. The convex portion 2313 protrudes towards the tilting shaft 1. When the outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312 are locked by bolts, the convex portions 2313 of the outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312 are in close contact with the tilting shaft 1, and the limiting card slots 2314 of the outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312 are connected together to form a large limiting card slot. A limiting block 11 is provided on the tilting shaft 1. When the tilting shaft 1 rotates, it drives the limiting block 11 to slide in the large limiting card slot formed by the outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312. The cooperation between the limiting card slot and the limiting block restricts the axial displacement and the circumferential fixed-angle rotation, restricts the tilting of the tilting rotor within a fixed-angle range, and prevents excessive tilting.
[0031] Optionally, limiting blocks 11 are symmetrically arranged above and below the tilting shaft 1. The convex portions 2313 of the outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312 are arranged in the middle, and both ends of the convex portion are limiting card slots 2314. When the outer bearing inner half ring one 2311 and the outer bearing inner half ring two 2312 are locked, two upper and lower large limiting card slots are formed. The upper limiting block 11 can rotate in the upper large limiting card slot, and the lower limiting block 11 can rotate in the lower large limiting card slot.
[0032] See Figure 4 and Figure 5, the inner limiting mechanism 33 includes an inner bearing outer retaining ring 331, an inner bearing inner retaining ring 332, and a tilting shaft clamping retaining ring 333. The inner bearing outer retaining ring 331 is installed on the side close to the outer support structure 2, and the inner bearing inner retaining ring 332 and the tilting shaft clamping retaining ring 333 are installed on the side far from the outer support structure 2. The inner bearing outer retaining ring 331 and the inner bearing inner retaining ring 332 are bolted to the inner tilting rib plate 32; the inner tilting rib plate 32 cooperates with the inner bearing 31, and the inner bearing outer retaining ring 331 and the inner bearing inner retaining ring 332 limit the axial displacement of the inner bearing 31; the tilting shaft clamping retaining ring 333 is locked and fixed to the tilting shaft 1 with bolts, the inner bearing 31 cooperates with the tilting shaft 1, and the tilting shaft 1 and the tilting shaft clamping retaining ring 333 limit the axial displacement of the inner bearing 31.
[0033] See Figure 6 , the inner bearing outer retaining ring 331 includes an inner bearing outer half ring one 3311 and an inner bearing outer half ring two 3312. The inner bearing outer half ring one 3311 and the inner bearing outer half ring two 3312 are a pair of semi-circular ring structures, and both ends are sleeved on the tilting shaft 1 through locking bolts, limiting the axial displacement of the inner bearing 31 and facilitating installation and disassembly.
[0034] The tilting shaft clamping retaining ring 333 includes a tilting shaft clamping half ring one 3331 and a tilting shaft clamping half ring two 3332. The tilting shaft clamping half ring one 3331 and the tilting shaft clamping half ring two 3332 are a pair of semi-circular ring structures, and both ends are sleeved on the tilting shaft 1 through locking bolts, limiting the axial displacement of the inner bearing 31 and facilitating installation and disassembly.
[0035] Preferably, to prevent dust, impurities, and moisture from entering the bearing interior, protect the bearing, and maintain the cleanliness of the lubricating grease, an outer bearing dust cover 211 is installed on the outer bearing 21, and an inner bearing dust cover 311 is installed on the inner bearing 31.
[0036] The working principle of the present utility model:
[0037] For an electric vertical takeoff and landing aircraft with a tilting shaft + single support structure, when tilting of the rotor is required, the tilting shaft 1 is controlled to rotate. The rotation of the tilting shaft 1 drives the rotation of the single support structure, and the single support structure limits the axial displacement of the inner bearing. Thus, the rotation of the tilting shaft 1 drives the rotation of the single support structure to achieve tilting of the rotor.
[0038] For an electric vertical take-off and landing aircraft with a tilting shaft + double support structure, when the rotor needs to be tilted, the tilting shaft 1 is controlled to rotate, and the limit block 11 of the tilting shaft 1 rotates within the limit card slot 2314 of the outer bearing inner retaining ring 231; the rotation of the tilting shaft 1 drives the rotation of the inner bearing 31, and the outer retaining ring 331 of the inner bearing, the inner retaining ring 332 of the inner bearing, and the tilting shaft retaining ring 333 limit the axial displacement of the inner bearing 31. Thus, the rotation of the tilting shaft 1 drives the rotation of the inner support structure 3, and the outer support structure 2 and the inner support structure 3 undergo relative displacement to achieve the tilting of the rotor.
[0039] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.
[0040] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
Claims
1. A support structure for a tilting nacelle, characterized in that, It includes a tilting shaft (1) and at least one supporting member sleeved on the tilting shaft. The supporting member includes a bearing, a tilting rib plate, and a limiting mechanism. The bearing is sleeved on the tilting shaft, the tilting rib plate is installed on the bearing, and the limiting mechanism is installed in the middle of the tilting rib plate. The limiting mechanism includes at least one limiting ring sleeved on the tilting shaft to limit the axial displacement of the bearing.
2. The support structure of a tilt nacelle according to claim 1, wherein The supporting member includes an outer supporting structure (2) and an inner supporting structure (3). The outer supporting structure (2) is installed at the end of the tilting shaft (1), and the inner supporting structure (3) is installed in the middle section of the tilting shaft (1).
3. The support structure of a tilt nacelle according to claim 2, characterized in that, The outer supporting structure (2) includes an outer bearing (21), an outer tilting rib plate (22), and an outer limiting mechanism (23). The outer bearing (21) is sleeved at the end of the tilting shaft (1), the outer tilting rib plate (22) is installed on the outer bearing (21), and the outer limiting mechanism (23) is fixedly connected to the middle of the outer tilting rib plate (22). The outer limiting mechanism (23) is sleeved on the tilting shaft (1), and the outer limiting mechanism (23) and the tilting shaft (1) are provided with rotatable limiting components that cooperate with each other.
4. The support structure of a tilting nacelle according to claim 3, characterized in that, The outer limiting mechanism (23) includes a locking nut (232), and the outer bearing (21) is connected and locked to the end of the tilting shaft (1) through the locking nut (232).
5. The support structure of a tilting nacelle according to claim 3, characterized in that, The outer limiting mechanism (23) includes an outer bearing inner retaining ring (231) installed on the side close to the inner supporting structure (3), and the outer bearing inner retaining ring (231) is fixedly connected to the outer tilting rib plate (22).
6. The support structure of a tilting nacelle according to claim 5, characterized in that, The inner side of the outer bearing inner retaining ring (231) is provided with a convex portion (2313) and a limiting groove (2314). The convex portion (2313) protrudes towards the tilting shaft (1), and when the outer bearing inner retaining ring (231) is locked with the tilting shaft (1), the convex portion (2313) closely adheres to the tilting shaft (1).
7. The support structure of a tilting nacelle according to claim 6, characterized in that, The outer limiting mechanism (23) and the tilting shaft (1) are provided with rotatable limiting components that cooperate with each other, including: a limiting block (11) is arranged on the tilting shaft (1), and the limiting block (11) cooperates with the limiting groove (2314). When the tilting shaft (1) rotates, the limiting block (11) is driven to rotate in the limiting groove (2314).
8. The support structure of a tilt nacelle according to claim 2, characterized in that, The inner supporting structure (3) includes an inner bearing (31), an inner tilting rib plate (32), and an inner limiting mechanism (33). The inner bearing (31) is sleeved in the middle of the tilting shaft (1), the inner tilting rib plate (32) is installed on the inner bearing (31), and the inner limiting mechanism (33) is connected to the middle of the inner tilting rib plate (32). The inner limiting mechanism (33) is sleeved on the tilting shaft (1).
9. The support structure of a tilting nacelle according to claim 7, characterized in that, The inner limiting mechanism (33) includes an inner bearing outer retaining ring (331), an inner bearing inner retaining ring (332), and a tilting shaft holding retaining ring (333). The inner bearing outer retaining ring (331) is installed on the side close to the outer support structure (2), and the inner bearing inner retaining ring (332) and the tilting shaft holding retaining ring (333) are installed on the side far from the outer support structure (2). The inner bearing outer retaining ring (331) and the inner bearing inner retaining ring (332) are bolted to the inner tilting rib plate (32). The tilting shaft holding retaining ring (333) is fixedly connected to the tilting shaft (1).
10. The support structure of a tilting nacelle according to claim 1, characterized in that, The limiting rings are a pair of semi-circular structures, and both ends of the semi-circular structures are sleeved on the tilting shaft (1) through locking bolts.