CN-122015586-A - Landing device capable of reusing rocket

Abstract

The invention relates to a landing device capable of reusing a rocket, and belongs to the field of aerospace ground guaranteeing equipment. The device comprises a fixed outer cylinder, a telescopic piece, a locking seat, a locking shell, a locking block and a locking baffle piece. The locking seat is fixedly arranged on the inner side of the fixed outer cylinder, and the locking shell is fixedly connected with the telescopic piece and is slidably embedded on the inner side of the telescopic piece. The locking shell is provided with a locking inner cylinder with a locking through groove, the locking seat is provided with a locking outer cylinder with a locking opening, and the locking inner cylinder is slidably sleeved on the inner side of the locking outer cylinder. The locking block is embedded in the locking through groove, and the locking baffle piece is slidably arranged in a locking gap between the locking inner cylinder and the telescopic piece. When the locking block is embedded into the locking opening, the locking seat is locked with the locking shell to limit the movement of the telescopic piece, and when the locking baffle piece is far away and the locking block is separated from the locking opening, the locking is released. The invention adopts the split design of the sleeve and the locking structure, combines light weight and high bearing, and realizes compact structure and reliable action through passive locking.

Inventors

• WANG MINGGANG
• ZHANG LEI
• SU ZHIQIANG
• QIN CHUNYUN
• YANG PENG
• ZHANG BEN
• LIU JIANKUN
• LI XIAO
• LI JIAN
• LIU QIA
• QIN BAOLIANG
• ZHU QIAN
• DAI ZHENG
• WANG CHANGJIANG
• LI JIAJIAN
• ZHU WEIDONG
• SHANG MINGYOU
• ZHANG XIAODONG
• ZHANG ZHENTAO

Assignees

• 蓝箭航天空间科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260407

Claims (10)

1. 1. A landing gear for a reusable rocket, comprising: the fixed outer cylinder (1) is of a hollow structure; One end of the telescopic piece (2) is slidably embedded in the fixed outer cylinder (1), and the other end of the telescopic piece extends out of the fixed outer cylinder (1); the locking seat (3) is fixedly arranged on the inner side of the fixed outer cylinder (1); the locking shell (4) is embedded in the inner side of the telescopic piece (2) in a sliding manner and is fixedly connected with the telescopic piece (2); a locking inner cylinder (41) arranged on one side of the locking shell (4) close to the locking seat (3), wherein a through locking through groove (42) is formed in the side wall of the locking inner cylinder (41), and a locking gap (43) is formed between the locking inner cylinder (41) and the telescopic piece (2); the locking outer cylinder (31) is arranged on one side, close to the locking shell (4), of the locking seat (3), the locking inner cylinder (41) is slidably sleeved on the inner side of the locking outer cylinder (31), and a locking opening (32) corresponding to the locking through groove (42) is formed in the side wall of the locking outer cylinder (31); the locking block (5) is embedded in the locking through groove (42) and can slide relative to the locking through groove (42) along the radial direction; a locking stopper (6) slidably fitted in the locking gap (43) for effecting locking by pushing the locking block (5) into the locking port (32) by sliding radially inward of the locking block (5); When the locking block (5) slides to be embedded in the locking opening (32), the locking seat (3) and the locking shell (4) are in a locking state to limit the axial movement of the telescopic piece (2), and when the locking baffle piece (6) is far away from the locking through groove (42) and the locking block (5) is separated from the locking opening (32), the locking seat (3) and the locking shell (4) are in an unlocking state to allow the telescopic piece (2) to axially move.
2. 2. Landing gear for a reusable rocket according to claim 1, further comprising a return spring (7), said return spring (7) being embedded inside the locking seat (3) with one end abutting against the locking catch (6) for driving the locking catch (6) towards the locking shell (4) for holding the locking catch (6) against the locking through slot (42).
3. 3. Landing gear for a reusable rocket according to claim 2, further comprising a spring support (8) arranged in the locking seat (3), the spring support (8) being provided with a spring groove (81), the return spring (7) being embedded in the spring groove (81).
4. 4. A landing gear of a reusable rocket according to claim 3, characterized in that the number of return springs (7) is several, several of the return springs (7) being circumferentially spaced inside the locking seat (3); The spring support piece (8) is annular, the spring support piece (8) is provided with a plurality of along circumference interval spring groove (81), every spring groove (81) is embedded to be equipped with in correspondence reset spring (7), a plurality of reset spring (7) one end all butt in locking fender piece (6).
5. 5. Landing gear for a reusable rocket according to claim 1, further comprising a closing cap (9), said closing cap (9) being arranged at the end of the fixed outer cylinder (1) remote from the locking shell (4), said closing cap (9) being provided with a through hole in the axial direction, said telescopic element (2) protruding from said through hole.
6. 6. Landing gear of a reusable rocket according to claim 1, characterized in that the number of locking through slots (42) is several, equally spaced along the circumference of the locking inner barrel (41); The number of the locking blocks (5) is the same as that of the locking through grooves (42), and the locking blocks are embedded in the locking through grooves (42) in a one-to-one correspondence manner; The number of the locking openings (32) is the same as that of the locking through grooves (42), and the positions are in one-to-one correspondence.
7. 7. Landing gear for a reusable rocket according to claim 1, characterized in that the locking seat (3) is provided with a first chamfer (33) on the side close to the locking shell (4) for guiding the embedding of the locking shell (4).
8. 8. Landing gear for a reusable rocket according to claim 1, characterized in that the side of the locking stop (6) close to the locking shell (4) is provided with a second chamfer (61) for guiding the locking block (5) to slide into the locking opening (32).
9. 9. Landing gear for a reusable rocket according to claim 1, characterized in that the side of the locking opening (32) close to the locking shell (4) is provided with a third chamfer (321) for pushing the locking block (5) out of the locking opening (32) when unlocking.
10. 10. Landing gear for reusable rockets according to claim 1, characterized in that the corners of the locking blocks (5) are provided with chamfers.

Description

Landing device capable of reusing rocket Technical Field The invention relates to the field of aerospace ground guarantee equipment. In particular to a landing gear of a reusable rocket. Background The landing system of the reusable rocket is a key link for determining success and failure of the recovery task. The landing leg and other structures of the system are in a folded and folded state at the flight stage and are clung to an arrow body, and after receiving an unfolding instruction, the landing leg and other structures are rapidly unfolded and locked, and then ground contact buffering and safe landing are completed. The transition from the folded state to the locked state is finally confirmed by the action of the locking mechanism, and the reliable realization of the functions is the premise of forming a stable supporting structure and realizing buffering and energy absorption. In the prior art, chinese patent No. 107215484A discloses a rocket recycling landing device, which adopts a four-leg support structure and consists of four parts of a rocket stage, a driving support, a driven support and a hydraulic damping rod, and integrally forms a crank mechanism. The working principle of the hydraulic damping device is that after the double-element explosion bolt is unlocked, the driven bracket is naturally unfolded under the action of gravity, and the hydraulic damping rod is clamped by the locker, so that the bracket is locked at the dead point of the crank mechanism, thereby maintaining the unfolded state; However, the prior art still has the defects that firstly, the locking mode depends on the geometric dead point position of the crank mechanism, the locking structure is externally hinged and locked, the locking structure is dispersed at the joint part of the bracket, the whole occupied space is large, and the layout is difficult to further optimize in the limited storage space of the arrow body. Secondly, in this scheme the locker only carries out spacingly to the hydraulic damping pole, and the lock point is single, and load transfer path is longer and dispersion, and when facing the complicated impact load in the landing moment, the atress condition at locking position is comparatively complicated, has put forward higher requirement to structural strength and rigidity. In addition, the unfolding process depends on the action of gravity, and the system can be completely unfolded only by motor assistance under special working conditions, so that the control complexity of the system is increased, and if the crank mechanism is folded after dead point locking, reverse driving or an additional unlocking mechanism is often needed, so that the quick resetting and repeated use are not facilitated. Aiming at the problems, the invention provides a brand new locking device, which integrates a locking structure in the sleeve, adopts a split type design and a passive locking mechanism, and fundamentally solves the problems of low space utilization rate, complex bearing path, inconvenient unlocking and resetting and the like in the prior art. Disclosure of Invention The invention aims to provide a landing device capable of reusing a rocket, so as to solve one or all of the technical problems in the prior art. In order to achieve the above object, the present invention provides the following solutions: The invention provides a landing gear of a reusable rocket, comprising: The fixed outer cylinder is of a hollow structure; One end of the telescopic piece is slidably embedded in the fixed outer cylinder, and the other end of the telescopic piece extends out of the fixed outer cylinder; The locking seat is fixedly arranged on the inner side of the fixed outer cylinder; the locking shell is embedded in the inner side of the telescopic piece in a sliding manner and is fixedly connected with the telescopic piece; The locking inner cylinder is arranged at one side of the locking shell, which is close to the locking seat, the side wall of the locking inner cylinder is provided with a through locking through groove, and a locking gap is formed between the locking inner cylinder and the telescopic piece; the locking outer cylinder is arranged on one side of the locking seat, which is close to the locking shell, the locking inner cylinder is slidably sleeved on the inner side of the locking outer cylinder, and a locking opening corresponding to the locking through groove is formed in the side wall of the locking outer cylinder; The locking block is embedded in the locking through groove and can slide relative to the locking through groove along the radial direction; The locking baffle piece is slidably embedded in the locking gap and is used for pushing the locking block to enter the locking port to realize locking by sliding on the radial inner side of the locking block; When the locking baffle piece is far away from the locking through groove, and the locking block is separated from the locking opening, the locking seat a