CN109631683B - Folding and unfolding device of grid rudder - Google Patents
Folding and unfolding device of grid rudder Download PDFInfo
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- CN109631683B CN109631683B CN201811436731.5A CN201811436731A CN109631683B CN 109631683 B CN109631683 B CN 109631683B CN 201811436731 A CN201811436731 A CN 201811436731A CN 109631683 B CN109631683 B CN 109631683B
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- sleeve
- folding
- pawl
- rudder
- grid rudder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/02—Stabilising arrangements
- F42B10/14—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel
- F42B10/143—Lattice or grid fins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/60—Steering arrangements
- F42B10/62—Steering by movement of flight surfaces
- F42B10/64—Steering by movement of flight surfaces of fins
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Pivots And Pivotal Connections (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
The invention discloses a folding and unfolding device of a grid rudder, and relates to the technical field of aerospace. The outer frame of grid rudder is articulated through location pivot and rudder axle, and the outer frame is equipped with the otic placode towards the opposite side of rudder face, and folding expansion device includes: a fixed support; the inner wall of the sleeve is provided with two sections of internal threads with equal thread pitches and opposite spiral directions; two rod pieces are respectively provided with external threads matched with the two sections of internal threads, one end of one rod piece is hinged with the fixed support, and one end of the other rod piece is detachably hinged with the lug plate; and the ratchet mechanism is arranged on the outer wall of the sleeve and used for driving the sleeve to rotate. The invention can repeatedly fold and unfold the grid rudder.
Description
Technical Field
The invention relates to the technical field of aerospace, in particular to a folding and unfolding device for a grid rudder.
Background
The grid rudder is a space multi-lifting surface system which is arranged in a frame form or a honeycomb form by an outer frame and a plurality of thin lattice walls in the inner part. The folding and unfolding of the grid rudder can be widely applied to missiles and carrier rockets, for example, the folding of the grid rudder can reduce the space occupied by the missile body during storage and increase the number of the missile in a limited space.
The folding and the expansion of grid rudder usually need a set of complete grid rudder expansion mechanism, at present, expand for the grid rudder through the electric explosion mode and provide power, but the grid rudder can't fold again after expanding, can not used repeatedly, the daily training of army of being not convenient for.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a folding and unfolding device for a grid rudder, which can repeatedly fold and unfold the grid rudder.
The invention provides a folding and unfolding device of a grid rudder, wherein an outer frame of the grid rudder is hinged with a rudder shaft through a positioning rotating shaft, and an ear plate is arranged on the opposite side of the outer frame, facing a rudder surface, and the folding and unfolding device comprises:
a fixed support;
the inner wall of the sleeve is provided with two sections of internal threads with equal thread pitches and opposite spiral directions;
two rod pieces are respectively provided with external threads matched with the two sections of internal threads, one end of one rod piece is hinged with the fixed support, and one end of the other rod piece is detachably hinged with the lug plate;
and the ratchet mechanism is arranged on the outer wall of the sleeve and used for driving the sleeve to rotate.
On the basis of the technical scheme, the two rod pieces are respectively as follows: the first rod piece is connected to the fixed support through a rotating shaft, the second rod piece is connected to the lug plate through a pin shaft, and the pin shaft, the rotating shaft and the positioning rotating shaft are parallel.
On the basis of the technical scheme, the fixed support comprises a bottom plate and two mounting plates which are arranged on the bottom plate in parallel, a gap between the two mounting plates is used for accommodating the hinged end of the fixed support on the first rod piece, and through holes matched with the rotating shaft are processed on the hinged ends of the two mounting plates and the first rod piece.
On the basis of the technical scheme, the second rod piece and the hinged end of the lug plate are provided with a U-shaped groove for accommodating the lug plate, through holes matched with the pin shaft are processed on the two side walls of the U-shaped groove and the lug plate, and one end of the pin shaft is provided with a pull ring.
On the basis of the technical scheme, the ratchet mechanism comprises a ratchet fixedly sleeved on the sleeve and a rotating part rotationally arranged on the sleeve, the rotating part is provided with a direction control assembly and a pawl assembly meshed with the ratchet, and the direction control assembly selects a corresponding ratchet direction for the ratchet mechanism by changing the meshing position of the pawl assembly and the ratchet.
On the basis of the technical scheme, the rotating part comprises a supporting plate and two rotating discs, wherein the supporting plate is sleeved on the sleeve, the two rotating discs are both rotatably connected with the sleeve, or the supporting plate is rotatably connected with the sleeve;
the ratchet wheel and the supporting plate are positioned between the two turntables, and the two turntables are connected with the supporting plate through bolts;
the rotating component further comprises a handle rod connected with the supporting plate, and the handle rod and the sleeve are oppositely arranged.
On the basis of the technical scheme, the pawl assembly comprises a left pawl and a right pawl which are respectively hinged to the supporting plate, the direction control assembly is arranged between the left pawl and the right pawl and controls the left pawl or the right pawl to be in the meshing position meshed with the ratchet wheel.
On the basis of the technical scheme, the direction control assembly comprises a base shaft and a cam fixed on the base shaft, one end of the base shaft is hinged to the plate surface of the supporting plate, a steering lock is arranged at the other end of the base shaft, and when the steering lock rotates left and right, the cam pushes the left pawl or the right pawl away from the ratchet wheel to release meshing.
On the basis of the technical scheme, the pawl assembly further comprises a limiting element arranged on the supporting plate, and the limiting element is arranged between the movable ends of the left pawl and the right pawl.
On the basis of the technical scheme, the cross section of the part, connected with the inner wall of the sleeve, of each rod piece is the largest in size.
Compared with the prior art, the embodiment of the invention provides a folding and unfolding device of a grid rudder, wherein an outer frame of the grid rudder is rotationally connected with a rudder shaft through a positioning rotating shaft, the folding and unfolding device comprises a fixed support, a sleeve, two rod pieces and a ratchet mechanism, and two sections of internal threads with equal thread pitches and opposite spiral directions are processed on the inner wall of the sleeve; the two rod pieces are arranged in the sleeve end to end and are provided with external threads matched with the two sections of internal threads, and the opposite ends of the two rod pieces are positioned outside the sleeve and are respectively hinged with the fixed support and the outer frame; the ratchet mechanism is arranged on the outer wall of the sleeve, drives the sleeve to rotate, and can perform repeated folding and unfolding operations on the grid rudder.
Drawings
FIG. 1 is an assembled schematic view of a grid rudder and a folding and unfolding apparatus with the grid rudder turned to a folded position in accordance with an embodiment of the present invention;
FIG. 2 is an assembled schematic view of a grid rudder and a folding and unfolding apparatus with the grid rudder rotated to an unfolded position in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a folding and unfolding apparatus for a grid rudder according to an embodiment of the present invention;
FIG. 4 is a partial side view of a folding and unfolding apparatus for a grid rudder in accordance with an embodiment of the present invention;
FIG. 5 is another side view of a folding and unfolding apparatus for a grid rudder in accordance with an embodiment of the present invention;
fig. 6 is a top view of the turntable of fig. 5 with the turntable removed.
In the figure:
1-fixed support, 11-bottom plate, 12-mounting plate, 2-sleeve, 21-inner hole, 21 a-left-handed internal thread and 21 b-right-handed internal thread;
3-ratchet mechanism, 31-ratchet, 32-rotating part, 321-support plate, 322-turntable, 323-handle bar, 33-pawl component, 331-left pawl, 332-right pawl, 333-limit element, 34-direction control component, 341-base shaft, 342-cam, 343-steering lock;
4-first rod piece, 5-second rod piece, 51-U-shaped groove, 52-extension part, 6-rotating shaft, 7-pin shaft, 71-pull ring;
10-an outer frame, 20-a positioning rotating shaft, 30-a rudder shaft, 40-an ear plate, 50-a first lug, 501-a first limit surface, 502-a second limit surface and 60-a limit hole.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The embodiment of the invention provides a folding and unfolding device of a grid rudder, which is used for carrying out repeated folding and unfolding operations on the grid rudder.
The grid rudder as an efficient pneumatic control surface has been successfully applied to attitude control of a launch vehicle. Because the grid rudder for the carrier rocket is large in size and heavy in weight, in order to reduce the structural space required for storage, transportation and transportation of the rocket, the rocket projectile body and the grid rudder are usually stored and transported separately, and the grid rudder is installed in place before launching.
The grid rudder shown in fig. 1 is a positioning and load-bearing integrated self-locking folded grid rudder comprising: 1 rudder shaft 30, 1 lattice rudder, 2 positioning shafts 20, 2 compression springs and 2 lock nuts, the lattice rudder being in the form of a frame composed of an outer frame 10 and a plurality of thin lattice walls arranged inside the outer frame 10, the 2 compression springs not being shown in fig. 1.
The outer frame 10 of the lattice rudder and the rudder shaft 30 are both provided with a plurality of support lugs, the positioning rotating shaft 20 penetrates through rotating shaft holes formed in the support lugs, one end of the positioning rotating shaft 20 is provided with threads, and 2 locking nuts are respectively fastened at the end, so that the outer frame 10 of the lattice rudder is hinged to the rudder shaft 30 through the positioning rotating shaft 20.
In practical application, one end of the rudder shaft 30 is connected with the installation cabin section of the grid rudder, and the other end is connected with the outer frame 10 of the grid rudder through the positioning rotating shaft 20.
The grid rudder shown in the figure 1 is high in mounting and positioning precision, does not need special tools during mounting, is short in mounting time, and meets the requirement for rapid launching of rockets.
Fig. 1 is a schematic view of the grid rudder turned to a folded position, in which the axis of the rudder shaft 30 is substantially perpendicular to the rudder surface, which reduces the space occupied during storage and transport.
Fig. 2 is a schematic view of the grid rudder rotated to a deployed position, where the axis of the rudder shaft 30 is substantially parallel to the control surface, which is facing the direction of flight.
In the assembly schematic shown in fig. 1 and 2, the positioning shaft 20 and the rudder surface are located on the same side, the outer frame 10 is provided with an ear plate 40 on the opposite side to the rudder surface, and the folding and unfolding device is located below the grid rudder and the rudder shaft 30. In other embodiments, the positioning shaft 20 may be located on the side of the outer frame 10.
Preferably, the lug plate 40 and the positioning shaft 20 are close to the rudder shaft 30, and do not affect the lift performance of the grid rudder during flight.
The first lug 50 disposed on the outer frame 10 further has a first limiting surface 501, the side surface of the outer frame 10 is a second limiting surface 502, the rudder shaft 30 has a first corresponding limiting surface and a second corresponding limiting surface, and when the lattice rudder rotates to the state that the first limiting surface 501 contacts with the first corresponding limiting surface, the lattice rudder reaches the folded position. When the grid rudder rotates to the state that the second limiting surface 502 is in contact with the second corresponding limiting surface, the grid rudder reaches the unfolding position, and the positioning accuracy of the grid rudder at the unfolding position can be high.
The rudder shaft 30 and the outer frame 10 are also provided with a limiting hole 60 with corresponding positions, and when the grid rudder rotates to the unfolding position, the grid rudder and the rudder shaft 30 are locked by a locking bolt 503 passing through the limiting hole 60, so that the grid rudder is locked.
Referring to fig. 1 to 3, the folding and unfolding device comprises a fixed support 1, a sleeve 2, two rods and a ratchet mechanism 3, wherein the sleeve 2 is provided with an inner hole 21 extending along the longitudinal axis of the sleeve 2, and two sections of internal threads with equal thread pitch and opposite spiral directions are processed on the inner wall of the sleeve 2; two rod pieces are respectively provided with external threads matched with the two sections of internal threads, one end of one rod piece is hinged with the fixed support 1, and one end of the other rod piece is detachably hinged with the lug plate 40. The ratchet mechanism 3 is arranged on the outer wall of the sleeve 2 and used for driving the sleeve 2 to rotate.
The two rod pieces are respectively: a first rod 4 connected to the fixed support 1 by a rotation shaft 6, and a second rod 5 detachably connected to the ear plate 40 by a pin 7, the first rod 4 and the second rod 5 being arranged end to end, the pin 7, the rotation shaft 6 and the positioning rotation shaft 20 being parallel.
The internal thread includes that pitch equals and extends to the levogyration internal thread and the dextrorotation internal thread at sleeve 2 both ends respectively, and first member 4 and second member 5 have the external screw thread of cooperation levogyration internal thread and dextrorotation internal thread respectively.
Preferably, the first rod piece 4 and the second rod piece 5 are respectively a left-handed stud and a right-handed stud, a left-handed internal thread 21a and a right-handed internal thread 21b which are matched with the left-handed stud and the right-handed stud are respectively machined in the inner hole 21, and the left-handed internal thread 21a and the right-handed internal thread 21b respectively account for half of the inner wall of the sleeve 2. When the sleeve 2 rotates, the two studs with opposite rotation directions extend or shorten along the axis direction of the sleeve 2 at the same time due to the fact that the rotation directions of the studs are opposite, so that the relative distance is doubled, the folding and unfolding efficiency of the grid rudder is improved, the grid rudder connected with the grid rudder is driven to rotate around the positioning rotating shaft, and the grid rudder can be folded and unfolded quickly.
In other embodiments, the first rod 4 and the second rod 5 may also be a right-hand stud and a left-hand stud, respectively.
In practical use, the fixed support 1 may be mounted on the installation cabin section of the grid rudder, or may be mounted on the ground or a platform arranged on the ground.
Referring to fig. 1 to 4, in the present embodiment, the positioning rotating shaft 20 and the rudder surface are located on the same side, and the fixed support 1 and the rudder shaft 30 are both mounted on the installation cabin. In practical application, the pin 7, the rotating shaft 6 and the positioning rotating shaft 20 are not located in the same plane, so that the two rod pieces can be stretched in the inner hole 21 of the sleeve 2 at the same time, the relative distance is changed, the pin 7 applies torque to the grid rudder to drive the grid rudder to rotate around the positioning rotating shaft 20, and the situation that the pin 7, the rotating shaft 6 and the positioning rotating shaft 20 are located in the same plane and apply thrust force but not torque to the positioning rotating shaft 20 is avoided.
An operator rotates the sleeve 2 by using the ratchet mechanism 3, so that the two rod pieces stretch out and draw back in the sleeve 2 at the same time to drive the grid rudder to rotate to a folding position or a unfolding position around the positioning rotating shaft 20, the grid rudder can be repeatedly folded and unfolded, and the folding or unfolding efficiency of the grid rudder is improved. After the grid rudder rotates to the unfolding position, the grid rudder and the rudder shaft 30 are locked by using a locking bolt to penetrate through the limiting hole 60, and the pin shaft 7 is pulled out, so that the grid rudder is separated from the folding and unfolding device, the rotating operation of the grid rudder is not influenced in the flying process, and the use reliability of the grid rudder is ensured.
In addition, the fixed support 1, the sleeve 2 and the two rod pieces in the folding and unfolding device are connected, so that the grid rudder is not required to be disassembled and assembled in the folding and unfolding processes, and the operation is convenient.
Preferably, the cross-sectional dimension of the portion of each rod member connected to the inner wall of the sleeve 2 is the largest, and the cross-sectional dimension in the direction from the connected portion to the hinged end is reduced, thereby improving the mechanical strength of the rod member, reducing the weight, facilitating the operation and reducing the load of the operator.
Referring to fig. 4, the fixing support 1 includes a bottom plate 11 and two mounting plates 12 juxtaposed on the bottom plate 11, a gap between the two mounting plates 12 accommodates a hinged end of the first rod 4 and the fixing support 1, and through holes matched with the rotating shaft 6 are processed on the hinged ends of the two mounting plates 12 and the first rod 4.
Referring to fig. 4, the hinged end of the second rod 5 and the ear plate 40 is provided with a U-shaped groove 51 for accommodating the ear plate 40, through holes matched with the pin 7 are formed on both side walls of the U-shaped groove 51 and the ear plate 40, and one end of the pin 7 is provided with a pull ring 71.
Preferably, one side wall of the U-shaped groove 51 has an extended portion 52 extending outward in a direction perpendicular to the length direction of the second rod 5, and the extended portion 52 is adapted to receive the pin 7 when the pin 7 is pulled out of the U-shaped groove 51, so as to prevent the pin 7 from falling off.
Referring to fig. 5 and 6, the ratchet mechanism 3 includes a ratchet 31 fixedly sleeved on the sleeve 2 and a rotating member 32 rotatably disposed on the sleeve 2, wherein the ratchet 31 is fixedly connected with the sleeve 2 through a fixing pin, the rotating member 32 is provided with a direction control assembly 34 and a pawl assembly 33 engaged with the ratchet 31, and the direction control assembly 34 selects a corresponding ratchet direction for the ratchet mechanism 3 by changing an engagement position of the pawl assembly 33 and the ratchet 31, so that the ratchet 31 rotates clockwise or counterclockwise together with the sleeve 2.
In one embodiment, the rotating member 32 includes a supporting plate 321 sleeved on the sleeve 2 and two rotating discs 322 rotatably connected to the sleeve 2, the ratchet 31 and the supporting plate 321 are located between the two rotating discs 322, and the two rotating discs 322 are connected to the supporting plate 321 through bolts.
The turning member 32 further comprises a handle bar 323 connected to the support plate 321, the handle bar 323 being arranged opposite the sleeve 2. Specifically, the handle bar 323 is connected with the support plate 321 through a bolt, so that the handle bar 323 can be assembled on site, and the handle bar 323 with different lengths can be replaced conveniently according to actual use conditions.
The two turntables 322 are connected by using bolts, so that the support plate 321 and the ratchet wheel 31 are clamped between the two turntables 322 in parallel, stable support is provided for the support plate 321, the engagement connection between the ratchet wheel 31 and the pawl assembly 33 on the support plate 321 is stable and reliable, and the ratchet wheel 31 is ensured to drive the sleeve 2 to rotate stably.
Preferably, the direction control assembly 34 includes a base shaft 341 and a cam 342 fixed on the base shaft 341, one end of the base shaft 341 is hinged to the plate surface of the supporting plate 322, the other end of the base shaft 341 is provided with a steering lock 343, and when the steering lock 343 is rotated left and right, the cam 342 pushes the left pawl 331 or the right pawl 332 away from the ratchet 31 to disengage.
The steering lock 343 controls the left pawl 331 or the right pawl 332 to be respectively engaged with and disengaged from the ratchet wheel 31 through the cam 342 connected with the steering lock 343, so that the rotation directions of the ratchet wheel 31 and the sleeve 2 are controlled, and in the folding and unfolding operation process, the handle rod 323 does not need to be repeatedly installed for many times, and the folding or unfolding efficiency of the grid rudder is further improved.
The pawl assembly 33 further includes a limiting element 333 disposed on the support plate 322, the limiting element 333 being disposed between the movable ends of the left pawl 331 and the right pawl 332.
When the steering lock 343 rotates left and right, the cam 342 pushes the left pawl 331 or the right pawl 332 away from the ratchet wheel 31 to disengage, and the handle lever 323 is continuously rotated back and forth to push the ratchet wheel 31 and the sleeve 2 to rotate together in different directions, so that the relative distance between the first rod 4 and the second rod 5 is increased or decreased, and the grid rudder is folded and unfolded around the positioning rotating shaft 20.
Referring to fig. 4, in another embodiment, the rotating member 32 includes a supporting plate 321 rotatably connected to the sleeve 2 and two rotating discs 322 sleeved on the sleeve 2, the ratchet 31 and the supporting plate 321 are located between the two rotating discs 322, and the two rotating discs 322 are connected to the supporting plate 321 through bolts.
The rotating member 32 further comprises a handle bar 323 connected to the supporting plate 321, the handle bar 323 is disposed opposite to the sleeve 2, and a connecting portion of the handle bar 323 and the supporting plate 321 is clamped between the two rotating discs 322 by using a plurality of (e.g., three) bolts, so that the handle bar 323, the supporting plate 321, and the two rotating discs 322 are fixedly connected, the stress condition of the folding and unfolding device is improved, the reliability is improved, and the service life is prolonged.
A through slot is formed on one of the turntables 322, and one end of the base shaft 341 passes through the through slot and is connected to the steering lock 343, so as to facilitate operation.
The two turntables 322 are connected by using bolts, so that the support plate 321 and the ratchet wheel 31 are clamped between the two turntables 322 in parallel, stable support is provided for the support plate 321, the engagement connection between the ratchet wheel 31 and the pawl assembly 33 on the support plate 321 is stable and reliable, and the ratchet wheel 31 is ensured to drive the sleeve 2 to rotate stably. In addition, the ratchet wheel 31, the pawl assembly 33 and the cam 342 are all positioned between the two turntables 322, which not only can protect the components of the folding and unfolding device, but also can ensure the safety of operators.
The folding and unfolding device provided by the embodiment of the invention does not contain initiating explosive devices, and is convenient and safe for personnel to operate. Simple structure, connection reliability is high, and occupation space is little, and it is fast to expand, dismantles the convenience. The device can be repeatedly operated and used for many times, and can meet the training requirements of folding and unfolding the daily grid rudder of an army.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (7)
1. A folding and unfolding device of a grid rudder, wherein an outer frame (10) of the grid rudder is hinged with a rudder shaft (30) through a positioning rotating shaft (20), and an ear plate (40) is arranged on the outer frame (10) towards the opposite side of a rudder surface, and the folding and unfolding device is characterized by comprising:
a fixed support (1);
the inner wall of the sleeve (2) is provided with two sections of internal threads with equal thread pitches and opposite spiral directions;
two rod pieces are respectively provided with external threads matched with the two sections of internal threads, one end of one rod piece is hinged with the fixed support (1), and one end of the other rod piece is detachably hinged with the lug plate (40);
the ratchet mechanism (3) is arranged on the outer wall of the sleeve (2) and is used for driving the sleeve (2) to rotate;
the two rod pieces are respectively: a first rod (4) connected to the fixed support (1) through a rotating shaft (6), and a second rod (5) connected to the lug plate (40) through a pin shaft (7), wherein the pin shaft (7), the rotating shaft (6) and the positioning rotating shaft (20) are parallel;
the fixed support (1) comprises a bottom plate (11) and two mounting plates (12) which are arranged on the bottom plate (11) in parallel, a gap between the two mounting plates (12) accommodates a hinged end of the first rod piece (4) and the fixed support (1), and through holes matched with the rotating shaft (6) are processed on the hinged ends of the two mounting plates (12) and the first rod piece (4);
a U-shaped groove (51) for accommodating the lug plate (40) is formed in the hinged end of the second rod piece (5) and the lug plate (40), through holes matched with the pin shaft (7) are formed in the two side walls of the U-shaped groove (51) and the lug plate (40), and a pull ring (71) is arranged at one end of the pin shaft (7);
one side wall of the U-shaped groove (51) is provided with an extension part (52) which extends outwards along the length direction perpendicular to the second rod piece (5), and the extension part (52) is used for accommodating the pin shaft (7) when the pin shaft (7) is pulled out of the U-shaped groove (51).
2. The folding and unfolding apparatus for a grid rudder according to claim 1, wherein: the ratchet mechanism (3) comprises a ratchet wheel (31) fixedly sleeved on the sleeve (2) and a rotating part (32) rotatably arranged on the sleeve (2), a direction control assembly (34) and a pawl assembly (33) meshed with the ratchet wheel (31) are arranged on the rotating part (32), and the direction control assembly (34) selects a corresponding ratchet direction for the ratchet mechanism (3) by changing the meshing position of the pawl assembly (33) and the ratchet wheel (31).
3. The folding and unfolding apparatus for a grid rudder according to claim 2, wherein:
the rotating part (32) comprises a supporting plate (321) and two rotating discs (322) which are sleeved on the sleeve (2), wherein the two rotating discs (322) are both rotatably connected with the sleeve (2), or the supporting plate (321) is rotatably connected with the sleeve (2);
the ratchet wheel (31) and the supporting plate (321) are positioned between the two turntables (322), and the two turntables (322) are connected with the supporting plate (321) through bolts;
the rotating part (32) further comprises a handle rod (323) connected with the supporting plate (321), and the handle rod (323) and the sleeve (2) are arranged oppositely.
4. A folding and unfolding apparatus of a grid rudder as claimed in claim 3, wherein:
the pawl assembly (33) comprises a left pawl (331) and a right pawl (332) which are hinged to the supporting plate (321) respectively, the direction control assembly (34) is arranged between the left pawl (331) and the right pawl (332) and controls the left pawl (331) or the right pawl (332) to be in the meshing position meshed with the ratchet wheel (31).
5. The folding and unfolding apparatus for a grid rudder according to claim 4, wherein: the direction control assembly (34) comprises a base shaft (341) and a cam (342) fixed on the base shaft (341), one end of the base shaft (341) is hinged to the plate surface of the supporting plate (321), the other end of the base shaft (341) is provided with a steering lock (343), and when the steering lock (343) rotates left and right, the cam (342) pushes the left pawl (331) or the right pawl (332) away from the ratchet wheel (31) to be disengaged.
6. The folding and unfolding apparatus for a grid rudder according to claim 5, wherein: the pawl assembly (33) further comprises a limiting element (333) arranged on the supporting plate (321), and the limiting element (333) is arranged between the movable ends of the left pawl (331) and the right pawl (332).
7. The folding and unfolding apparatus for a grid rudder according to claim 1, wherein: the cross-sectional dimension of the portion of each rod member connected to the inner wall of the sleeve (2) is the largest.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811436731.5A CN109631683B (en) | 2018-11-28 | 2018-11-28 | Folding and unfolding device of grid rudder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811436731.5A CN109631683B (en) | 2018-11-28 | 2018-11-28 | Folding and unfolding device of grid rudder |
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| CN109631683A CN109631683A (en) | 2019-04-16 |
| CN109631683B true CN109631683B (en) | 2021-06-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110525633B (en) * | 2019-08-06 | 2020-12-15 | 上海机电工程研究所 | Stabilizer for aircraft |
| CN114152151B (en) * | 2021-12-08 | 2023-08-04 | 航天科工火箭技术有限公司 | Folding grid rudder |
| CN115808103A (en) * | 2022-11-16 | 2023-03-17 | 北京星际荣耀科技有限责任公司 | Grid rudder folding and unfolding device and carrier rocket |
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| DE2841773A1 (en) * | 1978-09-26 | 1980-04-03 | Messerschmitt Boelkow Blohm | Missile pivoting guidance mechanism - has fins extending in lengthwise direction of missile in rest position |
| JPS6239398A (en) * | 1985-08-12 | 1987-02-20 | グラマン・エアロスペ−ス・コ−ポレイシヨン | Folding blade structure |
| CN200992390Y (en) * | 2006-12-08 | 2007-12-19 | 安徽精科机器有限公司 | Ratchet-wheel type fastener |
| CN201744930U (en) * | 2010-05-20 | 2011-02-16 | 广州永联钢结构有限公司 | Bracing device for manufacturing steel structure |
| CN106197172A (en) * | 2016-09-08 | 2016-12-07 | 湖北航天技术研究院总体设计所 | A kind of self-locking positioning carrying integration folds grid rudder |
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| CN109631683A (en) | 2019-04-16 |
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