Rope-driven synchronous folding mechanism based on pyrotechnic operation

Abstract

The invention provides a rope-driven synchronous folding mechanism based on pyrotechnic operation, and belongs to the field of aerospace equipment. The problem that folding wings of an existing aircraft cannot be instantly and synchronously unfolded is solved. The device comprises a triangular frame, a rope linkage assembly, a fire driving assembly and a rotation avoiding assembly, the triangular frame is installed on an aircraft body, the rope linkage assembly is arranged on the triangular frame, and the fire driving assembly is installed on the triangular frame and combined with the rope linkage assembly to drive the rotation avoiding assembly to rotate. The rotary avoiding assembly is connected with the rope linkage assembly and the triangular frame, the fire driving assembly drives the rope linkage assembly to rotate, the rotary avoiding assembly is driven to rotate through the rope linkage assembly, the rotary avoiding assembly retreats after rotating in place, and unfolding of the folding wing is achieved. The folding wing is mainly used for spanwise bending of the folding wing.

Description

Technical Field

[0001] The invention belongs to the field of aerospace equipment, and in particular relates to a rope-driven synchronous folding mechanism based on pyrotechnic action. Background Art

[0002] In recent years, with the advancement of modern industrial technology and the development of aviation knowledge, the design and manufacture of aircraft have become more complex and diversified. In order to meet the design requirements of aircraft miniaturization, researchers need to further optimize the structure and layout of aircraft on the basis of ensuring the performance and function of aircraft, so as to save space and improve transportation efficiency.

[0003] In this context, folding wing technology came into being. By designing a foldable wing structure, folding wing technology can reduce the lateral size of the aircraft to a minimum, so that the aircraft can take up less space during storage, transportation and launch, while also increasing the carrying capacity of the transport vehicle, thereby maximizing transportation efficiency.

[0004] When more wing surfaces need to be deployed instantly, without occupying the internal space of the aircraft, the rigid mechanical transmission structure can no longer meet the requirements of light weight and small size, so a flexible transmission structure, such as wire rope, is required. Due to the high strength and wear resistance of wire rope materials, it can withstand large tensile and torque loads, and has high reliability in operation under extreme environments and heavy load conditions. At the same time, wire rope transmission has high efficiency and low energy loss.

[0005] In this case, driving methods such as torsion springs and electric actuation cannot meet the requirements, while pyrotechnic actuation has the advantages of fast response speed, large output energy, light weight, and stable driving force, which can meet the needs of instantaneous deployment of multiple wing surfaces of the aircraft. Summary of the invention

[0006] In order to solve the problems in the prior art, the present invention proposes a rope-driven synchronous folding mechanism based on fire operation.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a rope-driven synchronous folding mechanism based on pyrotechnic operation, which includes a triangular frame, a rope linkage assembly, a pyrotechnic drive assembly and a rotation avoidance assembly, the triangular frame is installed on the aircraft body, the rope linkage assembly is arranged on the triangular frame, the pyrotechnic drive assembly is installed on the triangular frame and combined with the rope linkage assembly, the rotation avoidance assembly is connected with the rope linkage assembly and the triangular frame, the pyrotechnic drive assembly drives the rope linkage assembly to rotate, and the rotation avoidance assembly is driven by the rope linkage assembly to rotate, and the rotation avoidance assembly performs a retreat movement after rotating into place, thereby realizing the unfolding of the folding wings.

[0008] Furthermore, the rope linkage assembly includes a rotating pulley, a wire rope, a transition pulley and a limit bolt. The rotating pulley is respectively connected to the upper-level wire rope and the lower-level wire rope, the end of the wire rope is locked with the rotating pulley, and the transition pulley is fixedly connected to the triangular frame to provide guide support for the wire rope between two adjacent rotating pulleys. The limit bolt is installed on the triangular frame and fits with the transition pulley.

[0009] Furthermore, the pyrotechnic drive assembly includes a pyrotechnic actuator base, a pyrotechnic actuator, a crank, and an initial locking baffle. The pyrotechnic actuator base is fixedly connected to the triangular frame, the pyrotechnic actuator is hinged to the pyrotechnic actuator base, the crank is hinged to the pyrotechnic actuator, and the initial locking baffle is fixedly connected to the triangular frame and to the crank.

[0010] Furthermore, the rotation avoidance component includes a root frame, a spline shaft, a movable tooth, a fixed tooth, a separation spring and a fork rod, the root frame is fixedly connected to the triangular frame, the spline shaft is hinged to the triangular frame, the movable tooth is hinged to the spline shaft, the fixed tooth is spline-connected to the spline shaft, the movable tooth and the fixed tooth are meshed with each other, the separation spring is installed between the movable tooth and the fixed tooth, and the fork rod is fixedly connected to the movable tooth.

[0011] Furthermore, the rotating rope pulley is connected to the spline shaft with a flat key.

[0012] Furthermore, the crank is connected to the spline shaft with a flat key and fits the rotating rope pulley up and down.

[0013] Furthermore, the fork rod cooperates with the folding wing.

[0014] Compared with the prior art, the beneficial effect of the present invention is that the present invention solves the problem that the folding wings of the prior aircraft cannot be unfolded synchronously and instantaneously.

[0015] The present invention introduces the modular design concept into the design of the instantaneous synchronous folding mechanism. The pyrotechnic drive assembly is installed at a specific position of the triangular frame. The folding wings are driven by the pyrotechnic drive assembly and the rope linkage assembly is driven to achieve unfolding. After the folding wings are rotated into place, the fork rod of the rotary avoidance assembly is retracted to prevent the folding wings from being damaged. The initial state of the aircraft is the folded wing state. Since the envelope range of the aircraft is the smallest, the placement space of the aircraft can be effectively reduced. When the aircraft is launched, the folding wings are unfolded to achieve flight.

[0016] The invention has a simple structure, is easy to produce and install, is suitable for large-scale production, and has a low manufacturing cost. A triangular frame is used to support the entire mechanism, thereby preventing the mechanism from occupying the internal space of the aircraft. A steel wire rope is used as a transmission structure, and the folding wing has good synchronization when unfolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the initial state of the rope-driven synchronous folding mechanism based on fire action according to the present invention;

[0018] Figure 2 It is a schematic diagram of the positional relationship of the triangular frame, the rope linkage assembly, the pyrotechnic drive assembly, and the rotary avoidance assembly of the present invention;

[0019] Figure 3 It is a partial schematic diagram of the rope-driven synchronous folding mechanism based on fire action according to the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the slewing avoidance assembly of the present invention;

[0021] Figure 5 It is a schematic diagram of the unfolded state of the rope-driven synchronous folding mechanism based on fire action described in the present invention.

[0022] 1-aircraft body, 2-folding wings, 3-pyrotechnic drive assembly, 4-first rotation avoidance assembly, 5-triangular frame, 6-rope linkage assembly, 7-second rotation avoidance assembly, 8-rotating pulley, 9-wire rope, 10-transition pulley, 11-limiting bolt, 12-third rotation avoidance assembly, 13-pyrotechnic actuator base, 14-pyrotechnic actuator, 15-crank, 16-fork rod, 17-root frame, 18-initial locking baffle, 19-spline shaft, 20-moving tooth embedment, 21-fixed tooth embedment, 22-separation spring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figure 1-5 The present embodiment is described as a rope-driven synchronous folding mechanism based on pyrotechnic operation, which includes a triangular frame 5, a rope linkage assembly 6, a pyrotechnic drive assembly 3 and a rotation avoidance assembly. The triangular frame 5 is installed on the aircraft body 1, the rope linkage assembly 6 is arranged on the triangular frame 5, the pyrotechnic drive assembly 3 is installed on the triangular frame 5 and combined with the rope linkage assembly 6, the rotation avoidance assembly and the rope linkage assembly 6 are connected to the triangular frame 5, the pyrotechnic drive assembly 3 drives the rope linkage assembly 6 to rotate, and the rope linkage assembly 6 drives the rotation avoidance assembly to rotate, and the rotation avoidance assembly is driven by the rope linkage assembly 6, and the rotation avoidance assembly performs a retreat movement after rotating into place, so as to realize the unfolding of the folding wing 2.

[0025] The pyrotechnic drive assembly 3 includes a pyrotechnic actuator base 13, a pyrotechnic actuator 14, a crank 15, and an initial locking baffle 18. The pyrotechnic actuator base 13 is fixedly connected to the triangular frame 5, the pyrotechnic actuator 14 is hinged to the pyrotechnic actuator base 13, the crank 15 is hinged to the pyrotechnic actuator 14, the crank 15 is flat-keyed to the spline shaft 19, and fits the rotating rope pulley 8 up and down. The initial locking baffle 18 is fixedly connected to the triangular frame 5 and fixedly connected to the crank 15.

[0026] The rope linkage assembly 6 includes three rotating sheaves 8, wire ropes 9, transition sheaves 10 and limit bolts 11. The rotating sheaves 8 are connected to the spline shaft 19 by a flat key. The two rotating sheaves 8 are connected by wire ropes 9. The ends of the wire ropes 9 are locked with the rotating sheaves 8. The transition sheaves 10 are fixedly connected with the triangular frame 5 to provide guide support for the wire ropes 9 between the two adjacent rotating sheaves 8. The limit bolts 11 are installed on the triangular frame 5 and fit with the transition sheaves 10 to prevent the wire ropes 9 from falling off the transition sheaves 10. The initial locking is ensured by the pre-tightening force of the wire ropes 9 between the rotating sheaves 8.

[0027] In this embodiment, there are three groups of rotation avoidance components, namely a first rotation avoidance component 4 , a second rotation avoidance component 7 , and a third rotation avoidance component 12 .

[0028] The first rotary avoidance component 4 includes a root frame 17, a spline shaft 19, a movable tooth 20, a fixed tooth 21, a separation spring 22 and a fork rod 16. The root frame 17 is fixedly connected to the triangular frame 5, the spline shaft 19 is hinged to the triangular frame 5, the movable tooth 20 is hinged to the spline shaft 19, the fixed tooth 21 is spline-connected to the spline shaft 19, the movable tooth 20 and the fixed tooth 21 are meshed with each other, the separation spring 22 is installed between the movable tooth 20 and the fixed tooth 21, the fork rod 16 is fixedly connected to the movable tooth 20, and cooperates with the folding wing 2.

[0029] The second rotation avoidance component 7 includes a root frame 17, a spline shaft 19, a movable tooth 20, a fixed tooth 21, a separation spring 22 and a fork rod 16. The root frame 17 is fixedly connected to the triangular frame 5, the spline shaft 19 is hinged to the triangular frame 5, the movable tooth 20 is hinged to the spline shaft 19, the fixed tooth 21 is spline-connected to the spline shaft 19, the movable tooth 20 and the fixed tooth 21 are meshed with each other, the separation spring 22 is installed between the movable tooth 20 and the fixed tooth 21, the fork rod 16 is fixedly connected to the movable tooth 20, and cooperates with the folding wing 2.

[0030] The third rotation avoidance component 12 includes a root frame 17, a spline shaft 19, a movable tooth 20, a fixed tooth 21, a separation spring 22 and a fork rod 16. The root frame 17 is fixedly connected to the triangular frame 5, the spline shaft 19 is hinged to the triangular frame 5, the movable tooth 20 is hinged to the spline shaft 19, the fixed tooth 21 is spline-connected to the spline shaft 19, the movable tooth 20 and the fixed tooth 21 are meshed with each other, the separation spring 22 is installed between the movable tooth 20 and the fixed tooth 21, the fork rod 16 is fixedly connected to the movable tooth 20, and cooperates with the folding wing 2.

[0031] Here’s how it works:

[0032] Assume the aircraft status is Figure 1 As shown, at this time, the pyrotechnic actuator 14 of the pyrotechnic drive assembly 3 is ignited, and the push rod of the pyrotechnic actuator 14 pushes the crank 15 to break the shear pin of the initial locking baffle 18 and rotate it. Since the crank 15 is connected to the spline shaft 19 with a flat key, the rotating rope pulley 8 is connected to the spline shaft 19 with a flat key, so that the first rotary avoidance assembly 4 and the rotating rope pulley 8 connected thereto are rotated. Since the two rotating rope pulleys 8 are connected by a steel wire rope 9, the second rotary avoidance assembly 7, the third rotary avoidance assembly 12 and the rotating rope pulley 8 connected thereto are rotated. Since the fixed tooth 21 is splined to the spline shaft 19, the movable tooth 20 cooperates with the fixed tooth 21, and the fork rod 16 is fixedly connected to the movable tooth 20, the fork rod 16 is rotated, thereby driving the folding wing 2 to rotate. At this time, the separation spring 22 installed between the movable tooth 20 and the fixed tooth 21 is in an energy storage state. When the folding wing 2 is rotated into place and locked, the movable tooth 20 rotates to the retraction groove position of the root frame 17, and the separation spring 22 releases the stored energy to push the movable tooth 20 and the fork rod 16 to retract in the direction of the rotating rope wheel 8, so as to separate the fork rod 16 from the folding wing 2, thereby preventing the folding wing 2 from being damaged during the flight of the aircraft. Figure 5 shown.

[0033] The above is a detailed introduction to a rope-driven synchronous folding mechanism based on fire action provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A rope-driven synchronous folding mechanism based on fire action, characterized in that: The invention comprises a triangular frame (5), a rope linkage assembly (6), a pyrotechnic drive assembly (3) and a slewing avoidance assembly. The triangular frame (5) is mounted on an aircraft body (1). The rope linkage assembly (6) is arranged on the triangular frame (5). The pyrotechnic drive assembly (3) is mounted on the triangular frame (5) and combined with the rope linkage assembly (6). The slewing avoidance assembly and the rope linkage assembly (6) are connected to the triangular frame (5). The pyrotechnic drive assembly (3) drives the rope linkage assembly (6) to rotate, and the slewing avoidance assembly is driven to slew through the rope linkage assembly (6). After the slewing avoidance assembly rotates to a certain position, it moves backward to realize the unfolding of the folding wing (2).

2. The rope-driven synchronous folding mechanism based on fire action according to claim 1, characterized in that: The rope linkage assembly (6) comprises three rotating rope wheels (8), a steel wire rope (9), a transition rope wheel (10) and a limiting bolt (11); the rotating rope wheel (8) is flat-keyed with a spline shaft (19); the two rotating rope wheels (8) are connected via a steel wire rope (9); the ends of the steel wire rope (9) are locked with the rotating rope wheels (8); the transition rope wheel (10) is fixedly connected with a triangular frame (5) to provide a guide support for the steel wire rope (9) between two adjacent rotating rope wheels (8); the limiting bolt (11) is installed on the triangular frame (5) and fits with the transition rope wheel (10) to prevent the steel wire rope (9) from falling off the transition rope wheel (10); the initial locking between the rotating rope wheels (8) is ensured by the pre-tightening force of the steel wire rope (9).

3. The rope-driven synchronous folding mechanism based on fire action according to claim 1, characterized in that: The pyrotechnic drive assembly (3) comprises a pyrotechnic actuator base (13), a pyrotechnic actuator (14), a crank (15), and an initial locking baffle (18); the pyrotechnic actuator base (13) is fixedly connected to the triangular frame (5); the pyrotechnic actuator (14) is hinged to the pyrotechnic actuator base (13); the crank (15) is hinged to the pyrotechnic actuator (14); the crank (15) is keyed to a spline shaft (19) and fits the rotating rope wheel (8) up and down; the initial locking baffle (18) is fixedly connected to the triangular frame (5) and to the crank (15).

4. The rope-driven synchronous folding mechanism based on fire action according to claim 1, characterized in that: The slewing avoidance assembly comprises a root frame (17), a spline shaft (19), a movable tooth insert (20), a fixed tooth insert (21), a separation spring (22) and a fork rod (16); the root frame (17) is fixedly connected to the triangular frame (5); the spline shaft (19) is hinged to the triangular frame (5); the movable tooth insert (20) is hinged to the spline shaft (19); the fixed tooth insert (21) is spline-connected to the spline shaft (19); the movable tooth insert (20) and the fixed tooth insert (21) are meshed with each other; the separation spring (22) is installed between the movable tooth insert (20) and the fixed tooth insert (21); and the fork rod (16) is fixedly connected to the movable tooth insert (20).

5. A rope-driven synchronous folding mechanism based on fire action according to claim 2 or 3, characterized in that: The rotating rope wheel (8) is parallel-keyed to the spline shaft (19).

6. The rope-driven synchronous folding mechanism based on fire action according to claim 3 is characterized in that: The crank (15) is connected with a spline shaft (19) by a flat key and fits with the rotating rope wheel (8) up and down.

7. The rope-driven synchronous folding mechanism based on fire action according to claim 4 is characterized in that: The fork rod (16) cooperates with the folding wing (2).

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