Unmanned aerial vehicle side wing unfolding driving mechanism with locking function

Abstract

The invention discloses an unmanned aerial vehicle side wing unfolding driving mechanism with a locking function. The locking function module is designed in the space envelope of the unfolding function module, the two functions of unfolding and locking of the side wings are achieved at the same time in the limited space, and the situation that the aerodynamic configuration of the unmanned aerial vehicle is damaged due to the fact that the wing face protruding out of the mechanism is too large is avoided; the aerodynamic resistance in the flight process of the unmanned aerial vehicle is reduced, the lift-drag ratio of the aircraft is improved, and the flight time is prolonged. And the sizes of fit clearances between the locking clamping blocks and the right hinge in the two groups of locking function modules are different. The large gap ensures that the clamping block can be locked in, and the small gap ensures that the clamping block can be locked tightly. The two gaps are matched and complemented with each other, and the reliability of the locking function of the mechanism is improved. According to the invention, the output torque of the unfolding function module is improved by adopting a double-torsion-spring parallel connection mode, and the problems that the axial space occupation of the mechanism is too large, the flight resistance is increased and the lift-drag ratio of the aircraft is reduced due to the adoption of a large-wire-diameter and single-torsion-spring scheme are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of morphing aircraft, and particularly relates to a side wing unfolding driving mechanism of an unmanned aerial vehicle with a locking function. BACKGROUND

[0002] In order to realize flight performance such as long range and high lift, an unmanned aerial vehicle usually adopts a large wing span lifting body aerodynamic layout. However, the defect of large space occupation of the large wing span lifting body aerodynamic layout is contradictory to the constraint of limited loading space of a launch platform, and seriously limits the number of unmanned aerial vehicles loaded and launched by the launch platform at one time. Morphing wing technology is a core technology for the unmanned aerial vehicle to break through the constraint of the narrow loading space of the launch platform, and is a key basis for improving the mobility and flight distance of the unmanned aerial vehicle and increasing the number of unmanned aerial vehicles loaded and launched by the launch platform at one time. A morphing mechanism is a core component of the morphing wing technology, and is a core device for realizing the switching of the unmanned aerial vehicle from the folded state in the barrel (box) before launching to the unfolded flight state after being launched out of the barrel (box).

[0003] The large wing span lifting body morphing unmanned aerial vehicle is reduced in size by multiple folding of components such as a main wing, a side wing, a tail wing and an air speed tube before launching, and is accommodated in a launch barrel (box). After the unmanned aerial vehicle is ejected from the barrel (box), the main wing, the side wing, the tail wing and the air speed tube device are unfolded under the common driving of multiple morphing mechanisms, so as to realize the switching of the unmanned aerial vehicle from the folded and accommodated state in the barrel (box) before launching to the unfolded flight state after being launched out of the barrel (box).

[0004] The core functions of the morphing mechanism include driving the unfolding of components such as the main wing, the side wing, the tail wing and the air speed tube of the unmanned aerial vehicle and realizing the position and angle locking after unfolding. SUMMARY

[0005] The present application provides a side wing unfolding driving mechanism of an unmanned aerial vehicle with a locking function, which realizes the rotation and unfolding of the side wing of the unmanned aerial vehicle and the position locking after unfolding in a limited space by arranging a wing locking function module in the space envelope of an unfolding function module, and avoids the damage of the large space occupation of the side wing unfolding driving mechanism to the aerodynamic shape of the unmanned aerial vehicle.

[0006] In a first aspect, a side wing unfolding driving mechanism of an unmanned aerial vehicle with a locking function is provided, which includes an unfolding function module and a first locking function module.

[0007] The unfolding function module comprises a first torsion spring, a central shaft, a right hinge and a left hinge; the left hinge and the right hinge of the unfolding function module are fixedly connected with the main wing and the side wing respectively; the left hinge is provided with a first left connecting seat, and the right hinge is provided with a first right connecting seat; the first right connecting seat is located between the first torsion spring and the first left connecting seat; the first left connecting seat is provided with a left connecting hole, and the first right connecting seat is provided with a right connecting hole; the left connecting hole and the right connecting hole are sleeved on the central shaft, so that the right hinge and the left hinge are relatively rotated around the central shaft; the first torsion spring is sleeved on the central shaft and drives the right hinge to rotate relative to the left hinge.

[0008] The first locking function module is installed on the left hinge; the first locking function module comprises a first locking block, a first compression spring and a first guide core shaft.

[0009] The first locking block is provided with a locking block through hole, the first locking block is sleeved on the first guide core shaft through the locking block through hole, and the first guide core shaft is fixed on the first left connecting seat of the left hinge; the first guide core shaft is provided with a step on the side away from the first locking block, the first compression spring is sleeved on the first guide core shaft and abuts between the first locking block and the step of the first guide core shaft; the first locking block is driven by the first compression spring to slide relative to the first guide core shaft.

[0010] Before the right hinge is unfolded to the position, the first locking block is in contact with the side surface of the first right connecting seat of the right hinge; the first right connecting seat is further provided with a notch matched with the shape of the first locking block.

[0011] After the right hinge is unfolded to the position, the first locking block is clamped into the notch on the first right connecting seat under the driving of the first compression spring, and structural self-locking is formed.

[0012] With reference to the first aspect, in some implementations of the first aspect, the unfolding function module further comprises a left hinge torsion spring arm pad and a right hinge torsion spring arm pad, the left hinge torsion spring arm pad is arranged on the left hinge, and the right hinge torsion spring arm pad is arranged on the right hinge; the left hinge torsion spring arm pad and the right hinge torsion spring arm pad are both used for supporting the torsion spring wire of the first torsion spring.

[0013] With reference to the first aspect, in some implementations of the first aspect, the mechanism further comprises:

[0014] a second torsion spring arranged symmetrically with the first torsion spring,

[0015] a second left connecting seat arranged symmetrically with the first left connecting seat,

[0016] a second right connecting seat arranged symmetrically with the first right connecting seat,

[0017] a second locking function module arranged symmetrically with the first locking function module.

[0018] With reference to the first aspect, in some implementations of the first aspect, a fitting gap between the first locking block of the first locking function module and the notch on the first right connecting seat is a first gap, a fitting gap between the second locking block of the second locking function module and the notch on the second right connecting seat is a second gap, and the first gap is different from the second gap.

[0019] With reference to the first aspect, in some implementations of the first aspect, the right hinge has a rotation angle range of 0°-180° relative to the left hinge.

[0020] Compared with the prior art, the scheme provided by the present application has at least the following beneficial technical effects:

[0021] 1) The unfolding function module is arranged in a limited space, and both unfolding and locking functions of the side wing are realized in the limited space, so that damage of the mechanism protruding wing surface to the aerodynamic shape of the unmanned aerial vehicle is avoided, and the aerodynamic drag of the unmanned aerial vehicle during flight is reduced, the lift-drag ratio of the aircraft is improved, and the flight time is prolonged.

[0022] 2) The present application designs two groups of locking function modules in a limited space envelope, and the fitting gaps between the locking blocks and the right hinges in the two groups of locking function modules are different in size. The large gap ensures that the block can be "locked in", and the small gap ensures that the block can be "locked tightly". The two gaps complement each other, improving the reliability of the locking function of the mechanism.

[0023] 3) The present application uses a double torsional spring parallel mode to improve the output torque of the unfolding function module, realizes the effect of "1+1>2", and avoids the problems of large axial space occupation, increased flight resistance, and reduced lift-drag ratio of the aircraft caused by the large-diameter, single-torsional spring scheme. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic diagram of an unfolding function module of a side wing unfolding drive mechanism.

[0025] Figure 2 FIG. 2 is a schematic diagram of the internal structure of the unfolding function module of the side wing unfolding drive mechanism.

[0026] Figure 3 FIG. 3 is a schematic diagram of a locking function module of a side wing unfolding drive mechanism.

[0027] Figure 4 FIG. 4 is a schematic diagram of the overall appearance of the side wing unfolding drive mechanism in a folded 180° state.

[0028] Figure 5 FIG. 5 is a schematic diagram of the overall appearance of the side wing unfolding drive mechanism in a folded 90° state.

[0029] Figure 6This is a schematic diagram showing the overall appearance of the wing deployment drive mechanism in its deployed state.

[0030] Reference numerals: 1—First torsion spring, 2—Central shaft, 3—Second torsion spring, 4—Right hinge, 5—Left hinge, 6—Left hinge torsion spring support arm pad, 7—Left connecting seat, 8—Right connecting seat, 9—First locking block, 10—First compression spring, 11—First guide spindle, 12—Second locking block, 13—Second compression spring, 14—Second guide spindle. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 As shown, the present invention provides a side wing deployment drive mechanism for a drone with a locking function. The drone side wing deployment drive mechanism includes a deployment function module and at least one locking function module, wherein the deployment function module realizes the rotational deployment movement of the side wing, and the locking function module locks the side wing in its deployed position.

[0033] like Figure 1 and Figure 2 As shown, the unfolding functional module includes a first torsion spring 1, a central shaft 2, a second torsion spring 3, a right hinge 4, and a left hinge 5. The left hinge 5 and right hinge 4 of the unfolding functional module are fixedly connected to the main wing and side wing, respectively. Left connecting seats 7 are provided on both sides of the left hinge 5, and right connecting seats 8 are provided on both sides of the right hinge 4. The two right connecting seats 8 are located inside the two left connecting seats 7. The left connecting seats 7 on both sides of the left hinge 5 have coaxial left connecting holes, and the right connecting seats 8 on both sides of the right hinge 4 have coaxial right connecting holes. Both left and right connecting holes are fitted onto the central shaft 2 and can rotate relative to the central shaft 2, thereby enabling the right hinge 4 and left hinge 5 to rotate relative to each other around the central shaft 2. The first torsion spring 1 and the second torsion spring 3 are fitted onto the central shaft 2, located between the two left connecting seats 7 and between the two right connecting seats 8. The unfolding function module uses a parallel connection of the first torsion spring 1 and the second torsion spring 3 to increase the output torque, driving the right hinge 4 to reduce the rotation angle relative to the left hinge 5 from 180° to 0°.

[0034] The unfolding function module may also include a left hinge torsion spring support arm pad and a right hinge torsion spring support arm pad. The left hinge torsion spring support arm pad is set on the left hinge 5, and the right hinge torsion spring support arm pad is set on the right hinge 4. Both the left hinge torsion spring support arm pad and the right hinge torsion spring support arm pad are used to support the support feet or arms extended by the first torsion spring 1 and the second torsion spring 3.

[0035] exist Figure 3In the illustrated embodiment, the UAV wing deployment drive mechanism includes two locking function modules, both of which are mounted on the left hinge 5. In other embodiments, the locking function modules may also be mounted on the right hinge 4.

[0036] The two locking function modules are a first locking function module and a second locking function module. The first locking function module includes a first locking block 9, a first compression spring 10, and a first guide spindle 11. The second locking function module includes a second locking block 12, a second compression spring 13, and a second guide spindle 14.

[0037] Taking the first locking function module as an example, the first locking block 9 has a locking block through hole, and the first locking block 9 is sleeved on the first guide spindle 11 through the locking block through hole. The first guide spindle 11 is fixed on the left connecting block 7 of the left hinge 5. The first guide spindle 11 has a step on the side opposite to the first locking block 9, and a first compression spring 10 is sleeved on the first guide spindle 11 and presses against the step between the first locking block 9 and the first guide spindle 11. The first locking block 9 is driven by the first compression spring 10 to realize the sliding of the first locking block 9 relative to the first guide spindle 11.

[0038] like Figure 4 and Figure 5 As shown, before the right hinge 4 is fully extended (angle > 0°), the first locking block 9 contacts the side of the right connecting seat 8 of the right hinge 4. The right connecting seat 8 also has a notch that matches the shape of the first locking block 9. Figure 6 As shown, after the right hinge 4 is fully extended (rotation angle = 0°), the first locking block 9, driven by the first compression spring 10, engages in the notch on the right connecting seat 8, with a transmission angle of 0°, thus forming a self-locking structure.

[0039] In some embodiments, the two sets of locking function modules correspond to the two right connecting seats 8 respectively; wherein, the fitting clearance between the first locking block 9 and the notch on the first right connecting seat is the first clearance, and the fitting clearance between the second locking block 12 and the notch on the second right connecting seat is the second clearance. The first clearance and the second clearance are different, that is, one is a large clearance and the other is a small clearance. The large clearance ensures that it can be "locked in", and the small clearance ensures that it can be "locked tightly". The two clearances cooperate with each other to improve the reliability of the locking function module. This ensures that the side wings remain in the deployed position and do not rotate under the action of aerodynamic force.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.

Claims

1. A side wing deployment drive mechanism for a UAV with locking function, characterized in that, Includes an expansion function module and a first locking function module; The unfolding functional module includes a first torsion spring (1), a central shaft (2), a right hinge (4), and a left hinge (5); the left hinge (5) and the right hinge (4) of the unfolding functional module are fixedly connected to the main wing and the side wing, respectively; the left hinge (5) is provided with a first left connecting seat, and the right hinge (4) is provided with a first right connecting seat, the first right connecting seat being located between the first torsion spring (1) and the first left connecting seat; the first left connecting seat has a left connecting hole, and the first right connecting seat has a right connecting hole, both the left connecting hole and the right connecting hole are sleeved on the central shaft (2), thereby realizing the relative rotation of the right hinge (4) and the left hinge (5) around the central shaft (2); the first torsion spring (1) is sleeved on the central shaft (2), driving the right hinge (4) to rotate relative to the left hinge (5); The first locking function module is installed on the left hinge (5); the first locking function module includes a first locking block (9), a first compression spring (10), and a first guide spindle (11); The first locking block (9) has a locking block through hole, and the first locking block (9) is sleeved on the first guide spindle (11) through the locking block through hole. The first guide spindle (11) is fixed on the first left connecting seat of the left hinge (5). The first guide spindle (11) has a step on the side opposite to the first locking block (9). The first compression spring (10) is sleeved on the first guide spindle (11) and presses against the step between the first locking block (9) and the first guide spindle (11). The first locking block (9) is driven by the first compression spring (10) to realize the sliding of the first locking block (9) relative to the first guide spindle (11). Before the right hinge (4) is fully extended, the first locking block (9) contacts the side of the first right connecting seat of the right hinge (4); the first right connecting seat also has a notch that matches the shape of the first locking block (9); After the right hinge (4) is fully extended, the first locking block (9) is driven by the first compression spring (10) and engages in the notch on the first right connecting seat to form a self-locking structure.

2. The mechanism according to claim 1, characterized in that, The unfolding function module also includes a left hinge torsion spring support arm pad and a right hinge torsion spring support arm pad. The left hinge torsion spring support arm pad is set on the left hinge (5), and the right hinge torsion spring support arm pad is set on the right hinge (4). Both the left hinge torsion spring support arm pad and the right hinge torsion spring support arm pad are used to support the torsion spring wires extending from the first torsion spring (1).

3. The mechanism according to claim 1, characterized in that, The organization also includes: The second torsion spring (3) is symmetrically arranged with respect to the first torsion spring (1). The second left connecting seat is symmetrically arranged with respect to the first left connecting seat. The second right connecting seat is symmetrically arranged with respect to the first right connecting seat. A second locking function module is set symmetrically to the first locking function module.

4. The mechanism according to claim 3, characterized in that, The first locking block (9) of the first locking function module and the notch on the first right connecting seat have a first gap in their fit. The second locking block (12) of the second locking function module and the notch on the second right connecting seat have a second gap in their fit. The first gap and the second gap are different.

5. The mechanism according to claim 1, characterized in that, The right hinge (4) rotates relative to the left hinge (5) at an angle ranging from 0° to 180°.

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