CN115808103A - Grid rudder folding and unfolding device and carrier rocket - Google Patents
Grid rudder folding and unfolding device and carrier rocket Download PDFInfo
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- CN115808103A CN115808103A CN202211434964.8A CN202211434964A CN115808103A CN 115808103 A CN115808103 A CN 115808103A CN 202211434964 A CN202211434964 A CN 202211434964A CN 115808103 A CN115808103 A CN 115808103A
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Abstract
The invention provides a grid rudder folding and unfolding device and a carrier rocket, and relates to the technical field of flight attitude control of a flying machine, wherein the grid rudder folding and unfolding device comprises a rudder shaft assembly, a folding and unfolding mechanism and a swinging mechanism, one end of the rudder shaft assembly is hinged with a grid rudder through a first hinge shaft, and the other end of the rudder shaft assembly is connected with an rocket body; one end of the folding and unfolding mechanism is connected with the rudder shaft assembly, the other end of the folding and unfolding mechanism is hinged with the grid rudder through a second hinge shaft, the first hinge shaft and the second hinge shaft are parallel and arranged at intervals, and the folding and unfolding mechanism drives the grid rudder to fold/unfold around the first hinge shaft and the second hinge shaft relative to the arrow body; the swing mechanism is arranged on the arrow body, and the driving end of the swing mechanism is connected with the rudder shaft assembly to drive the grid rudder to swing around the axial direction of the rudder shaft assembly. The grid rudder folding and unfolding device disclosed by the invention is simple in structure and not easy to damage, so that the rocket body keeps a good pneumatic appearance and controls the posture of the rocket body, and the carrier rocket is ensured to land accurately.
Description
Technical Field
The invention relates to the technical field of flight attitude control of a flying device, in particular to a grid rudder folding and unfolding device and a carrier rocket.
Background
In the reentry and return process of the reusable carrier rocket, the operating surface of the pneumatic control mechanism is required to generate aerodynamic force, so that the maneuverability of the rocket is improved, and the stability and controllability of the rocket are improved, thereby better controlling the track and the posture of the rocket and enabling the rocket to accurately fly back to a landing field on land or on the sea.
After the existing rocket core is separated in one stage, the pneumatic stability is poor, the anti-interference capability is poor, most of the existing rocket core is in an unstable rolling state in the descending process, the falling point of the existing rocket core is greatly scattered, and the requirement of recycling cannot be met. At present, in the prior art, the problems are solved by arranging a grid rudder on an arrow body, an unfolding mechanism is arranged between the grid rudder and the arrow body, and the grid rudder in an unfolded state can control the track and the posture of a rocket. However, the existing grid rudder deployment mechanism has a complex structure, contains more parts, has poor structural reliability, is easy to damage, and even can cause serious consequences such as the rocket being unable to land accurately.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems that the unfolding mechanism of the conventional grid rudder has a complex structure, contains more parts, has poor structural reliability, is easy to damage and even can cause the defect that a rocket cannot land accurately, thereby providing the grid rudder folding and unfolding device and the carrier rocket which have the advantages of simple structure, less contained parts, good structural reliability, difficult damage and capability of ensuring the accurate landing of the carrier rocket.
In order to solve the above problems, the present invention provides a grid rudder folding and unfolding apparatus including:
one end of the rudder shaft assembly is hinged with the grid rudder through a first hinge shaft, and the other end of the rudder shaft assembly is connected with the arrow body;
one end of the folding and unfolding mechanism is connected with the rudder shaft assembly, the other end of the folding and unfolding mechanism is hinged with the grid rudder through a second hinge shaft, the first hinge shaft and the second hinge shaft are parallel and arranged at intervals, and the folding and unfolding mechanism drives the grid rudder to fold/unfold around the first hinge shaft and the second hinge shaft relative to the arrow body;
and the swinging mechanism is arranged on the arrow body, and the driving end of the swinging mechanism is connected with the rudder shaft assembly to drive the grid rudder to swing around the axial direction of the rudder shaft assembly.
As a preferred technical solution of the grid rudder folding and unfolding device, the folding and unfolding mechanism includes a folding and unfolding driving member and a connecting rod, the folding and unfolding driving member is disposed on the rudder shaft assembly, a driving end of the folding and unfolding driving member is connected to the connecting rod and drives the connecting rod to move along an axial direction thereof, and one end of the connecting rod, which is far away from the folding and unfolding driving member, is hinged to the grid rudder through the second hinge shaft.
As a preferred technical solution of the grid rudder folding and unfolding device, the folding and unfolding mechanism further includes a limiting member, and the limiting member is disposed on the rudder shaft assembly and is used for limiting the unfolding angle of the grid rudder.
As an optimal technical scheme of the grid rudder folding and unfolding device, the limiting part comprises a stop block, the stop block is arranged close to the second hinge shaft, and when the grid rudder is unfolded to a preset unfolding angle, the grid rudder is abutted to the stop block.
As folding preferred technical scheme who expandes the device of grid rudder, rocking mechanism includes swing driving piece and rocking arm, and the rocking arm setting is on the steering column subassembly, and the swing driving piece sets up on the arrow body, and the swing driving piece is connected with the rocking arm, and the one end that the steering column subassembly is close to the arrow body is provided with aligning bearing subassembly.
Folding preferred technical scheme who expandes the device as the grid rudder, the rudder axle subassembly includes the rudder axle, the rudder axle passes through rudder axle support and arrow body coupling, the rudder axle passes through self-aligning bearing subassembly is installed on the rudder axle support, the rudder axle support with arrow body coupling.
As the folding preferred technical scheme who expandes the device of grid rudder, the rudder axle includes first dabber and second dabber, self-aligning bearing subassembly includes first self-aligning bearing and second self-aligning bearing, first self-aligning bearing cover is established outside the first dabber, the second self-aligning bearing cover is established outside the second dabber first self-aligning bearing go up threaded connection have be used for to the first gland nut of packing force is applyed to first self-aligning bearing threaded connection has on the second self-aligning bearing be used for to the second gland nut of packing force is applyed to the second self-aligning bearing.
As the preferred technical scheme of the grid rudder folding and unfolding device, the grid rudder is hinged with the steering shaft through the first hinge shaft, a hinge assembly is arranged at the hinged position of the grid rudder and the steering shaft, the hinge assembly comprises a pressing ring and a connecting piece, the first hinge shaft is arranged in the mounting grooves corresponding to the grid rudder and the steering shaft, the pressing ring is mounted on the outer surface of the first hinge shaft through a fastening piece, and the grid rudder and the steering shaft are connected through the connecting piece.
As a preferred technical solution of the grid rudder folding and unfolding device, the hinge assembly further includes a first sealing ring and a second sealing ring, the first sealing ring is disposed between the first hinge shaft and the mounting groove, and the second sealing ring is disposed on the first hinge shaft.
A launch vehicle comprises a grid rudder and an arrow body, wherein the grid rudder and the arrow body are connected through a grid rudder folding and unfolding device.
The technical scheme of the invention has the following advantages:
1. the invention provides a grid rudder folding and unfolding device, which comprises: the grid rudder comprises a rudder shaft assembly, a folding and unfolding mechanism and a swinging mechanism, wherein one end of the rudder shaft assembly is hinged with a grid rudder through a first hinge shaft, and the other end of the rudder shaft assembly is connected with an arrow body; one end of the folding and unfolding mechanism is connected with the rudder shaft assembly, the other end of the folding and unfolding mechanism is hinged with the grid rudder through a second hinge shaft, the first hinge shaft and the second hinge shaft are parallel and arranged at intervals, and the folding and unfolding mechanism drives the grid rudder to fold/unfold around the first hinge shaft and the second hinge shaft relative to the arrow body; the swing mechanism is arranged on the arrow body, and the driving end of the swing mechanism is connected with the rudder shaft assembly to drive the grid rudder to swing around the axial direction of the rudder shaft assembly. The grid rudder and the rocket body are connected through the folding and unfolding mechanism and the swinging mechanism, and the grid rudder can be attached to the surface of the rocket body in the ascending section of the carrier rocket, so that a good aerodynamic appearance is kept; the grid rudder can be unfolded through the folding and unfolding mechanism in the descending section of the carrier rocket, and the swinging mechanism can also make the grid rudder perform swinging motion, so that the posture of the rocket body is controlled, and the effective motion control of the grid rudder in two directions is realized.
2. The grid rudder folding and unfolding device further comprises a limiting piece, wherein the limiting piece comprises a stop block, the stop block is arranged close to the second hinge shaft, when the grid rudder is unfolded to a preset unfolding angle, the grid rudder is abutted against the stop block, and the grid rudder cannot be unfolded continuously, so that the limitation of the unfolding angle is realized. The grid rudder is limited in unfolding by arranging the stop block, so that the unfolding angle of the grid rudder can be consistent with the preset angle, the reliability and accuracy of folding and unfolding movement of the grid rudder are guaranteed, and the running accuracy of a rocket is guaranteed.
3. The grid rudder folding and unfolding device provided by the invention has the advantages that the rudder shaft comprises the first mandrel and the second mandrel, the self-aligning bearing assembly comprises the first self-aligning bearing and the second self-aligning bearing, the first self-aligning bearing is sleeved outside the first mandrel, the second self-aligning bearing is sleeved outside the second mandrel, the first self-aligning bearing is in threaded connection with the first compression nut for applying pressing force to the first self-aligning bearing, and the second self-aligning bearing is in threaded connection with the second compression nut for applying pressing force to the second self-aligning bearing. Through setting up aligning bearing assembly, aligning bearing assembly has the alignment nature, can compensate to centering error, axle deformation, and aligning bearing assembly can bear radial load and axial load, has guaranteed the stability of rudder axle operating condition time, has avoided the rudder axle unnecessary wearing and tearing at the during operation, has prolonged the life of rudder axle, has reduced manufacturing cost.
4. The grid rudder folding and unfolding device provided by the invention has the advantages that the grid rudder and the rudder shaft are hinged through the first hinge shaft, the hinge part of the grid rudder and the rudder shaft is provided with the hinge assembly, the hinge assembly comprises the pressing ring and the connecting piece, the first hinge shaft is arranged in the mounting grooves corresponding to the grid rudder and the rudder shaft, the pressing ring is mounted on the outer surface of the first hinge shaft through the fastening piece, and the grid rudder and the rudder shaft are connected through the connecting piece. Through setting up first articulated shaft and articulated subassembly, reduce the friction when making the grid rudder rotate relative rudder axle, avoided rudder axle and grid rudder during operation unnecessary wearing and tearing, prolonged the life of rudder axle, and improve the reliability that the grid rudder was folded and is expanded.
5. The grid rudder folding and unfolding device provided by the invention further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is arranged between the first hinge shaft and the mounting groove, and the second sealing ring is arranged on the first hinge shaft. Through setting up first sealing washer and second sealing washer, can protect first articulated shaft, improve the leakproofness of grid rudder and rudder axle junction, prolong the life of first articulated shaft and articulated subassembly.
6. The carrier rocket provided by the invention has the beneficial effects of the grid rudder folding and unfolding device due to the grid rudder folding and unfolding device, and the details are not repeated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a grid rudder folding and unfolding device provided by the invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
FIG. 4 is an enlarged view of a portion of FIG. 1 at C;
FIG. 5 is an assembly view of a stop block of the grid rudder folding and unfolding apparatus provided by the present invention;
fig. 6 is a schematic structural diagram of a rocker arm of the grid rudder folding and unfolding device provided by the invention;
fig. 7 is a schematic structural diagram of a rudder shaft of the grid rudder folding and unfolding device provided by the invention;
fig. 8 is an assembly view of the grid rudder folding and unfolding device provided by the invention;
fig. 9 is a schematic structural view of the grid rudder folding and unfolding device provided by the invention in a folding state;
fig. 10 is a schematic structural view illustrating the grid rudder folding and unfolding device provided by the present invention unfolding from a folded state to an unfolded state;
fig. 11 is a schematic structural view of the grid rudder foldable and unfoldable device provided by the present invention at a first viewing angle when the device is in a fully unfolded state;
fig. 12 is a schematic structural view of the grid rudder foldable and unfoldable device provided by the present invention at a second viewing angle when the device is in a fully unfolded state;
fig. 13 is a schematic structural diagram of the grid rudder folding and unfolding device provided by the invention in a swinging state.
Description of reference numerals:
1. a grid rudder; 2. a first hinge shaft; 3. a second hinge shaft; 4. an arrow body; 51. a connecting rod; 52. a self-locking nut; 53. a shaft sleeve; 54. a bolt; 61. a rudder shaft; 611. a first mandrel; 612. a second mandrel; 62. a rudder shaft gland bush; 631. a first self-aligning bearing; 632. a first compression nut; 633. a second self-aligning bearing; 634. a second compression nut; 71. pressing a ring; 72. a connecting member; 73. a first seal ring; 74. a second seal ring; 75. a fastener; 8. a stop block; 9. a rocker arm; 91. a socket joint part; 92. and (4) swinging the arm part.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply 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 limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 to 7, it is a preferred embodiment of the grid rudder folding and unfolding device of the present invention. The grid rudder folding and unfolding device is simple in structure, few in contained parts, good in structural reliability and not prone to damage, and accurate landing of a carrier rocket is guaranteed.
The grid rudder folding and unfolding device of the embodiment comprises: one end of the rudder shaft assembly is hinged with the grid rudder 1 through a first hinged shaft 2, and the other end of the rudder shaft assembly is connected with the arrow body 4; one end of the folding and unfolding mechanism is connected with the rudder shaft assembly, the other end of the folding and unfolding mechanism is hinged with the grid rudder 1 through a second hinged shaft 3, a first hinged shaft 2 and a second hinged shaft 3 are arranged in parallel at intervals, and the folding and unfolding mechanism drives the grid rudder 1 to fold/unfold around the first hinged shaft 2 and the second hinged shaft 3 relative to the arrow body 4; the swinging mechanism is arranged on the arrow body 4, and the driving end of the swinging mechanism is connected with the rudder shaft assembly to drive the grid rudder 1 to swing around the axial direction of the rudder shaft assembly.
The grid rudder folding and unfolding device is characterized in that the grid rudder 1 and the rocket body 4 are connected through the folding and unfolding mechanism and the swing mechanism, and the grid rudder 1 can be attached to the surface of the rocket body 4 in the ascending section of the carrier rocket, so that a good pneumatic appearance is kept; the grid rudder 1 can be unfolded through the folding and unfolding mechanism in the descending section of the carrier rocket, and the grid rudder 1 can perform swinging motion through the swinging mechanism at the same time, so that the postures of the rocket body 4 are controlled, the motion control of the grid rudder 1 in different directions is realized, and the grid rudder folding and unfolding device has the advantages of simple structure, fewer contained parts and stronger structural reliability, can ensure the carrier rocket to land accurately, and improves the running safety and precision of the rocket.
In a preferred embodiment, the folding and unfolding mechanism comprises a folding and unfolding drive member and a link 51, the folding and unfolding drive member is arranged on the rudder shaft assembly, and the folding and unfolding drive member is used for providing folding and unfolding power for the grid rudder. The driving end of the folding and unfolding driving member is connected with the connecting rod 51 and drives the connecting rod 51 to move along the axial direction of the connecting rod 51, and one end of the connecting rod 51 far away from the folding and unfolding driving member is hinged with the grid rudder 1 through a second hinge shaft 3.
Specifically, as shown in fig. 1 and fig. 2, the folding and unfolding driving member includes an unfolding servo actuator, the unfolding servo actuator is installed on a rudder shaft assembly, the rudder shaft assembly includes a rudder shaft 61 and a rudder shaft gland 62, the rudder shaft gland 62 is covered on one end of the rudder shaft 61 close to the grid rudder 1, the rudder shaft 61 is connected with the arrow body 4 through a rudder shaft support, the grid rudder 1 and the rudder shaft 61 are formed by a high-strength titanium alloy laser deposition manufacturing process, the titanium alloy material is formed by a laser deposition manufacturing process and a machining forming technology, the structural efficiency is improved, meanwhile, the production period is shortened, the production cost is reduced, the rudder shaft gland 62 is formed by machining the high-strength titanium alloy, a mounting hole is formed in the rudder shaft gland 62, the connecting rod 51 passes through the mounting hole, one end of the connecting rod 51 is hinged to the unfolding servo actuator, the other end of the connecting rod 51 is hinged to the grid rudder 1 through the second hinge shaft 3, two ends of the connecting rod 51 are respectively provided with a connecting rod bearing, the connecting rod bearing is sleeved on the second hinge shaft 3, one end of the second hinge shaft 3 is sleeved with a shaft sleeve 53, the shaft sleeve 53 is fixed by a self-locking nut 52, and the other end is provided with a bolt 54.
Two sides of the rudder shaft 61 are hinged to the grid rudder 1 through the first hinge shaft 2, the driving end of the unfolding servo actuator stretches and retracts to drive the connecting rod 51 to stretch and retract along the axial direction of the connecting rod 51, and then the grid rudder 1 hinged to the connecting rod 51 is driven to fold or unfold around the first hinge shaft 2 and the second hinge shaft 3.
In a preferred embodiment, the folding and unfolding mechanism further includes a limiting member, the limiting member is disposed on the rudder shaft assembly, the limiting member includes a stop block 8, the stop block 8 is disposed near the second hinge shaft 3, and when the grid rudder 1 is unfolded to a preset unfolding angle, the grid rudder 1 abuts against the stop block 8. Specifically, as shown in fig. 1, 5 and 7, the stopper 8 is formed by machining a high-strength titanium alloy, the stopper 8 is fixedly connected to the rudder shaft 61 through a screw, the stopper 8 protrudes from an end surface of the rudder shaft 61 facing the grid rudder, preferably, an extending direction of the stopper 8 is parallel to an axial direction of the rudder shaft 61, when the grid rudder 1 is unfolded through the first hinge shaft 2 and the second hinge shaft 3, when the grid rudder 1 is unfolded in place (the unfolding angle reaches a preset unfolding angle), in this embodiment, the preset unfolding angle is an angle when the grid rudder 1 moves to be parallel to the axial direction of the rudder shaft 61, an end surface of the grid rudder 1 close to the rudder shaft 61 abuts against an end surface of the stopper 8, the grid rudder 1 cannot be unfolded any more, the stopper 8 limits the unfolding angle of the grid rudder 1, the unfolding angle of the grid rudder 1 is ensured to be consistent with the preset unfolding angle, and accuracy and reliability of the folding and unfolding motion of the grid rudder 1 are improved. Of course, the preset unfolding angle can be adjusted by adjusting the height of the stop block 8 protruding from the end face of the rudder shaft 61.
In a preferred embodiment, the swing mechanism comprises a swing driving member and a rocker arm 9, the rocker arm 9 is arranged on the steering shaft assembly, the swing driving member is arranged on the arrow body 4 and is connected with the rocker arm 9, and one end of the steering shaft assembly close to the arrow body 4 is provided with a self-aligning bearing assembly. Specifically, as shown in fig. 1 and fig. 6, the rocker arm 9 includes the cup joint portion 91 and the rocker arm portion 92, the rocker arm 9 is the mechanical processing shaping of high strength titanium alloy, the swing driving piece includes swing servo actuator, swing servo actuator installs on the arrow body 4, the cup joint portion 91 cover is established on rudder axle 61, swing servo actuator's drive end is articulated with rocker arm portion 92, the axial of swing servo actuator drive end and the axial parallel arrangement of rocker arm 9, swing servo actuator drives rocker arm 9 and swings around rudder axle 61, and then drive rudder axle 61 that is connected with rocker arm 9 and sway, then drive the grid rudder 1 that is connected with rudder axle 61 and carry out the swing motion. By arranging the swing mechanism, the grid rudder 1 changes the rudder attack angle through swing motion to provide lift force, so as to control the rocket attitude, and the rocket has the advantages of compact layout, small change range of chord direction pressure center, small hinge moment, large stall rudder deflection angle and the like; and the normal force generated by the grid rudder 1 in a larger attack angle range is basically linearly changed along with the attack angle, the slope of a lifting line can be adjusted, and the grid rudder is an effective control mechanism for an aircraft at supersonic speed, can delay stall, enables the rocket body 4 to have stronger capability of maintaining the lifting force than a single-sided wing, and slowly descends after the stalling attack angle is exceeded, so that the stalling characteristic of a control surface is improved, and the maneuvering performance of the rocket is enhanced.
In a preferred embodiment, the rudder shaft 61 is mounted on the rudder shaft 61 support through a self-aligning bearing assembly, the rudder shaft 61 includes a first core shaft 611 and a second core shaft 612, the self-aligning bearing assembly includes a first self-aligning bearing 631 and a second self-aligning bearing 633, the first self-aligning bearing 631 is sleeved outside the first core shaft 611, the second self-aligning bearing 633 is sleeved outside the second core shaft 612, a first compression nut 632 for applying a pressing force to the first self-aligning bearing 631 is screwed on the first self-aligning bearing 631, and a second compression nut 634 for applying a pressing force to the second self-aligning bearing 633 is screwed on the second self-aligning bearing 633.
Specifically, as shown in fig. 1 and 7, the first mandrel 611 and the second mandrel 612 are disposed from the rudder shaft 61 to a direction away from the rudder shaft 61, and the first mandrel 611 and the second mandrel 612 are disposed coaxially, the first self-aligning bearing 631 is sleeved outside the first mandrel 611 and fixed by the first gland nut 632, the second self-aligning bearing 633 is sleeved outside the second mandrel 612 and fixed by the second gland nut 634, the first self-aligning bearing 631, the second self-aligning bearing 633, the first gland nut 632, and the second gland nut 634 are formed by machining a high-strength titanium alloy, by providing a self-aligning bearing assembly, the self-aligning bearing assembly has a self-aligning property, which can compensate the centering error and the shaft deformation of the rudder shaft 61, and can bear radial load and axial load, thereby ensuring the stability of the rudder shaft 61 in a working state, avoiding unnecessary wear of the rudder shaft 61 during working, prolonging the service life of the rudder shaft 61, and reducing the production cost.
In a preferred embodiment, the grid rudder 1 and the rudder shaft 61 are hinged through a first hinge shaft 2, and a hinge assembly is arranged at the hinge position of the grid rudder 1 and the rudder shaft 61, the hinge assembly comprises a pressing ring 71 and a connector 72, the first hinge shaft 2 is arranged in a corresponding mounting groove of the grid rudder 1 and the rudder shaft 61, the pressing ring 71 is mounted on the outer surface of the first hinge shaft 2 through a fastener 75, and the grid rudder 1 and the rudder shaft 61 are connected through the connector 72.
Specifically, as shown in fig. 1 and fig. 3, mounting grooves have been all seted up to rudder axle 61 both sides, first articulated shaft 2 assembles in the mounting groove, first articulated shaft 2 includes self-aligning bearing, clamping ring 71 passes through fastener 75 and sets up like fastening screw in the self-aligning bearing upper end, grid rudder 1 sets up in the rudder axle 61 outside, grid rudder 1 inboard contacts with the rudder axle 61 outside promptly, and connect like connecting screw through connecting piece 72, through setting up articulated subassembly and self-aligning bearing, make grid rudder 1 and rudder axle 61 junction can bear radial load, make grid rudder 1 reduce the friction when relative rudder axle 61 rotates, avoided rudder axle 61 and grid rudder 1 unnecessary wearing and tearing at the during operation, the life of rudder axle 61 and grid rudder 1 has been prolonged.
In a preferred embodiment, the hinge assembly further includes a first sealing ring 73 and a second sealing ring 74, the first sealing ring 73 being disposed between the first hinge shaft 2 and the mounting groove, and the second sealing ring 74 being disposed on the first hinge shaft 2. Specifically, as shown in fig. 1 and 4, the first sealing ring 73 and the second sealing ring 74 are made of rubber, the self-aligning bearing is installed in the installation groove, the pressing ring 71 is pressed on the axial end face of the outer ring of the self-aligning bearing, the first sealing ring 73 is arranged in a gap between the self-aligning bearing and the installation groove, the sealing performance of the self-aligning bearing is enhanced while the self-aligning bearing and the installation groove are assembled and positioned, a stepped annular groove is formed on the outer circumferential face of the inner ring of the self-aligning bearing and the inner circumferential face of the outer ring of the bearing, the second sealing ring 74 is arranged in the stepped annular groove, the inner end face of the second sealing ring 74 is in abutting limiting fit with the circumferential face of the stepped annular groove, the press-mounting precision and the sealing effect of the combined sealing ring are guaranteed, and the sealing performance and the service life of the self-aligning bearing are improved.
The embodiment also provides a carrier rocket which comprises a grid rudder 1 and an arrow body 4, wherein the grid rudder 1 and the arrow body 4 are connected through the grid rudder folding and unfolding device.
In the ascending stage of the carrier rocket of the embodiment, the length direction of the grid rudder 1 is parallel to the outer wall of the arrow body 4, so that the grid rudder 1 is attached to the arrow body 4, the arrow body 4 can keep a good aerodynamic shape, and the whole grid rudder 1 mechanism does not act at this stage.
When the carrier rocket of this embodiment is in a first-stage descending section, the grid rudder 1 makes unfolding motion through the folding and unfolding mechanism, as shown in fig. 9 to fig. 11, the unfolding servo actuator drives the connecting rod 51 to move towards one end close to the arrow body 4, and further drives the grid rudder 1 to rotate around the first hinge shaft 2, so that the grid rudder 1 is gradually unfolded from a position parallel to the arrow body 4 to a direction perpendicular to the arrow body 4, when the grid rudder 1 is unfolded in place (reaches a preset unfolding angle), the preset unfolding angle in this embodiment is an angle when the grid rudder 1 is perpendicular to the outer wall of the arrow body 4, at this time, the end surface of the grid rudder 1 close to the rudder shaft 61 abuts against the end surface of the stop block 8, the stop block 8 limits the unfolding angle of the grid rudder 1, so that the grid rudder 1 cannot continue to move towards the direction far away from the rudder shaft 61, and the unfolding angle of the grid rudder 1 is consistent with the preset unfolding angle, meanwhile, due to the self-locking force of the unfolding servo actuator, the angle position of the grid rudder 1 can be locked, the grid rudder 1 is always kept at the position of a preset unfolding angle, the accuracy and the reliability of the folding and unfolding motion of the grid rudder 1 are improved, the grid rudder 1 can do swinging motion through a swinging mechanism while performing the unfolding motion, as shown in fig. 12 and 13, the swinging servo actuator drives a swinging arm part 92 to swing, so that a rudder shaft 61 is driven to swing, and then the grid rudder 1 swings around the rudder shaft, so that the posture of the rocket body 4 is controlled, the motion control of the grid rudder 1 in different directions is realized, the carrier rocket of the embodiment integrates the folding and unfolding motion and the swinging motion into a whole, the pneumatic resistance of the ascending section of the rocket body 4 is reduced, and the pneumatic control capability of the returning section is improved.
When folding, expansion servo actuator drives connecting rod 51 to keeping away from arrow body 4 one end motion, and then drives grid rudder 1 and rotate around first articulated shaft 2, makes grid rudder 1 from the position perpendicular to arrow body 4 to the direction parallel with arrow body 4 folding gradually.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A grid rudder folding and unfolding device is characterized by comprising:
one end of the rudder shaft component is hinged with the grid rudder (1) through a first hinged shaft (2), and the other end of the rudder shaft component is connected with the arrow body (4);
one end of the folding and unfolding mechanism is connected with the rudder shaft assembly, the other end of the folding and unfolding mechanism is hinged with the grid rudder (1) through a second hinge shaft (3), the first hinge shaft (2) and the second hinge shaft (3) are arranged in parallel at intervals, and the folding and unfolding mechanism drives the grid rudder (1) to fold/unfold around the first hinge shaft (2) and the second hinge shaft (3) relative to the arrow body (4);
and the swinging mechanism is arranged on the arrow body (4), and the driving end of the swinging mechanism is connected with the rudder shaft assembly to drive the grid rudder (1) to swing around the axial direction of the rudder shaft assembly.
2. The grid rudder folding and unfolding device according to claim 1, wherein the folding and unfolding mechanism comprises a folding and unfolding driving member and a connecting rod (51), the folding and unfolding driving member is arranged on the rudder shaft assembly, a driving end of the folding and unfolding driving member is connected with the connecting rod (51) and drives the connecting rod (51) to move along an axial direction of the connecting rod, and one end of the connecting rod (51) far away from the folding and unfolding driving member is hinged with the grid rudder (1) through the second hinge shaft (3).
3. The grid rudder folding and unfolding device according to claim 2, wherein the folding and unfolding mechanism further comprises a limiting member disposed on the rudder shaft assembly for limiting the unfolding angle of the grid rudder (1).
4. The grid rudder folding and unfolding device according to claim 3, wherein the limiting member comprises a stop block (8), the stop block (8) is arranged close to the second hinge shaft (3), and when the grid rudder (1) is unfolded to a preset unfolding angle, the grid rudder (1) abuts against the stop block (8).
5. The grid rudder folding and unfolding device according to claim 1, wherein the swinging mechanism comprises a swinging driving part and a rocker arm (9), the rocker arm (9) is arranged on the rudder shaft assembly, the swinging driving part is arranged on the arrow body (4), the swinging driving part is connected with the rocker arm (9), and one end of the rudder shaft assembly, which is close to the arrow body (4), is provided with a self-aligning bearing assembly.
6. Grid rudder folding and unfolding device according to claim 5, characterized in that the rudder shaft assembly comprises a rudder shaft (61), the rudder shaft (61) is connected with the arrow body (4) through a rudder shaft support, the rudder shaft (61) is mounted on the rudder shaft support through the self-aligning bearing assembly, and the rudder shaft support is connected with the arrow body (4).
7. The grid rudder folding and unfolding device according to claim 6, wherein the rudder shaft (61) comprises a first mandrel (611) and a second mandrel (612), the self-aligning bearing assembly comprises a first self-aligning bearing (631) and a second self-aligning bearing (633), the first self-aligning bearing (631) is sleeved outside the first mandrel (611), the second self-aligning bearing (633) is sleeved outside the second mandrel (612), a first compression nut (632) used for applying a pressing force to the first self-aligning bearing (631) is in threaded connection with the first self-aligning bearing (631), and a second compression nut (634) used for applying a pressing force to the second self-aligning bearing (633) is in threaded connection with the second self-aligning bearing (633).
8. Grid rudder folding and unfolding device according to claim 6 or 7, characterized in that the grid rudder (1) and the rudder shaft (61) are hinged through the first hinge shaft (2), and a hinge assembly is arranged at the hinge of the two hinge shafts, the hinge assembly comprises a pressing ring (71) and a connecting piece (72), the first hinge shaft (2) is arranged in a corresponding mounting groove of the grid rudder (1) and the rudder shaft (61), the pressing ring (71) is mounted on the outer surface of the first hinge shaft (2) through a fastening piece (75), and the grid rudder (1) and the rudder shaft (61) are connected through the connecting piece (72).
9. Grid rudder folding and unfolding device according to claim 8, characterised in that said hinge assembly further comprises a first sealing ring (73) and a second sealing ring (74), said first sealing ring (73) being arranged between said first hinge axis (2) and said mounting slot, said second sealing ring (74) being arranged on said first hinge axis (2).
10. A launch vehicle characterized by comprising a grid rudder (1) and an arrow body (4), said grid rudder (1) and said arrow body (4) being connected by a grid rudder fold deployment device according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211434964.8A CN115808103A (en) | 2022-11-16 | 2022-11-16 | Grid rudder folding and unfolding device and carrier rocket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211434964.8A CN115808103A (en) | 2022-11-16 | 2022-11-16 | Grid rudder folding and unfolding device and carrier rocket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115808103A true CN115808103A (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211434964.8A Pending CN115808103A (en) | 2022-11-16 | 2022-11-16 | Grid rudder folding and unfolding device and carrier rocket |
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| CN (1) | CN115808103A (en) |
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