Self-hidden folding lifting lug device

Abstract

The invention relates to a self-hidden folding lifting lug device in the technical field of flying object hanging and hoisting, which comprises a U-shaped lifting lug, a base with the bottom mounted in a cavity and a cavity wall plate corresponding to the outside of the top of the base, and a U-shaped notch is formed in the plate surface of the cavity wall plate; the U-shaped lifting lug comprises a top transverse section and two vertical supporting sections, the two vertical supporting sections are located in two longitudinal strip holes of the U-shaped notch respectively, the bottom ends of the vertical supporting sections are rotationally connected with the top of the base through rotating shafts, so that the U-shaped notch can be blocked after the U-shaped lifting lug rotates and lies down from an external hanging state, and the outer lug surface of the U-shaped lifting lug is aligned and consistent with the outer plate surface of the cavity wall plate; the rotating shaft is sleeved with a torsional spring, and two force arm sections of the torsional spring are connected with the U-shaped lifting lug and the base correspondingly, so that the U-shaped lifting lug has the lying tendency; the inner lug surface and the outer lug surface of the U-shaped lifting lug are inclined surfaces capable of mutually forming an included angle, and the rotating center of the rotating shaft deviates from an angle bisection surface of the included angle; the lifting lug device is more simplified, lighter and standardized, and meanwhile, the pneumatic shape is optimized.

Description

Technical Field

[0001] The invention relates to the technical field of hanging flying objects, and in particular to a self-hidden folding lifting ear device. Background Art

[0002] As is known, the hanging objects are usually hung or suspended on the aircraft body through the hanging ears. When the hanging objects are dropped or released from the hanging stage, the hanging function is completed. If the hanging ears are still in the external hanging state, it will not only look abrupt in structure, but also increase the aerodynamic resistance of the aircraft body. Therefore, the folding technology is generally used to fold the hanging ears from the cavity opening into the cavity of the aircraft body, and then control the opening and closing plate to automatically close the cavity opening. The whole mechanism is very complicated.

[0003] The Chinese invention patent with announcement number CN209386894U discloses a folding ear device, which can compensate for the aerodynamic shape only by the folding ear and the body structure itself without using auxiliary structures such as a mouth cover and a cover plate, thereby simplifying the structure and control while meeting the aerodynamic requirements; however, the defects of the existing patent are: first, the ear is in a square frame shape as a whole, and the shape structure does not meet the ear mounting standard, the weight is heavy, and the rotation and folding are not flexible enough. The raised structure used to fill the ear hole of the ear is also directly arranged inside the body, occupying a large space. More importantly, when the ear is erected, whether it is the frame-shaped missing hole left or the arc surface in the middle of the ear, it will increase the wind resistance to a certain extent; second, the ear cannot automatically lie down and hide. Summary of the invention

[0004] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the present invention discloses a self-hidden folding eye device, which is more simplified, lightweight and standardized while optimizing the aerodynamic shape.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The U-shaped lifting ear device is a self-concealed folding lifting ear device, comprising a U-shaped lifting ear, a base installed in a cavity at the bottom, and a cavity wall plate corresponding to the outside of the top of the base, wherein the plate surface of the cavity wall plate is provided with a U-shaped notch composed of a horizontal bar hole and two vertical bar holes connected to each other; the U-shaped lifting ear comprises a top horizontal section and two vertical support sections respectively connected to the two ends of the top horizontal section, and the two vertical support sections are respectively located in the two vertical bar holes of the U-shaped notch. The bottom end of the vertical support section is rotatably connected to the top of the base through a rotating shaft along the direction of the top horizontal section, so that the U-shaped lifting ear can block the U-shaped notch after it is rotated and laid down from an external hanging state, and the outer ear surface of the U-shaped lifting ear is aligned with the outer plate surface of the cavity wall plate; the rotating shaft sleeve is provided with a torsion spring, and the two force arm sections of the torsion spring are respectively connected to the U-shaped lifting ear and the base, so that the U-shaped lifting ear has a tendency to lie down; the inner ear surface and the outer ear surface of the U-shaped lifting ear are both set as inclined planes that can form an angle with each other, and the rotation center of the rotating shaft deviates from the angular bisector of the angle.

[0007] Furthermore, when the U-shaped lifting eye is in a lying state, the torsion spring still has a residual force to suppress the U-shaped lifting eye from automatically bouncing up.

[0008] Furthermore, a central clamping block and two side blocks symmetrically arranged on both sides of the central clamping block are fixed on the top of the base, and the central clamping block and the side blocks are respectively provided with coaxial threaded holes and sockets, and a rotating shaft is inserted in the socket of each side block, and the outer end shaft body of the rotating shaft is sleeved with a torsion spring, and the inner end shaft body of the rotating shaft is provided with an external thread adapted to be screwed into the threaded hole, and the bottom ends of the two vertical support sections of the U-shaped lifting ear are respectively and movably inserted into the gaps between the two side blocks and the central clamping block, and the bottom ends of the vertical support sections are provided with rotating holes adapted to allow the corresponding shaft bodies of the rotating shaft to rotate through.

[0009] Furthermore, the outer wall of the edge block is provided with a positioning screw hole which is vertically connected to the insertion hole, the shaft body of the rotating shaft corresponding to the positioning screw hole is provided with a positioning ring groove, and a safety screw which is adapted to be screwed in the positioning screw hole and is used to resist the bottom of the positioning ring groove.

[0010] Furthermore, a wear-resistant bushing is installed in the rotating hole.

[0011] Furthermore, a limiting block is provided in front of the base, which contacts the inner ear surface of the U-shaped lifting ear when the base is in a lying state; and a buffer pad is provided on the upper surface of the limiting block.

[0012] Furthermore, a detachable positioning plate is detachably mounted on the outer surface of the cavity wall plate for contacting the inner ear surface of the U-shaped lifting ear in the external hanging state.

[0013] Furthermore, the bottom end of the upright support section corresponds to the side extension of the outer ear surface of the U-shaped lifting ear to form a first limiting portion, and the base is provided with a second limiting portion that can correspond to the first limiting portion to allow the U-shaped lifting ear to have a rotation limit from a lying state to an external hanging state.

[0014] Furthermore, a groove cavity is provided on the hole wall of the transverse bar hole away from the longitudinal bar hole, and a guard plate is slidably inserted in the groove cavity, and a spring is connected between the inner end of the guard plate and the bottom surface of the groove cavity, and the outer end of the guard plate is configured to be able to extend out of the groove cavity to cover the U-shaped hole when the U-shaped ear is in an external hanging state, and the U-shaped fork portion contacts the end of the U-shaped ear and is bent obliquely outwards of the cavity wall plate to form an inclined top folded edge, and the inclined top folded edge is lower than the outer plate surface of the cavity wall plate, and a chamfer for accommodating the inclined top folded edge is provided at the notch of the groove cavity.

[0015] Furthermore, the outer plate surface of the cavity wall plate is provided with a fixing screw hole corresponding to the notch of the groove cavity, and the fixing screw hole is provided with a countersunk screw for screwing the abutment guard plate.

[0016] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects:

[0017] The self-concealing folding ear device disclosed in the present invention adopts a U-shaped ear to block the U-shaped missing hole on the cavity wall plate, and after the eccentric design, the upper load-bearing body of the ear can be overall in a cone-like shape with two inclined sides, which is more in line with the ear standard. When automatically folded by a torsion spring, no additional filling structure is required to occupy the cavity space, which can make the cavity wall plate opening area smaller and more convenient to manufacture, and the aerodynamic shape of the outer panel surface is more completely preserved to better protect the inside of the cavity. The U-shaped ear itself can also be made lighter and more flexible to rotate. The rotating part of the lower part of the U-shaped ear can also be better protected in the cavity, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side view schematic diagram of the U-shaped lifting lug of the present invention in an external hanging state;

[0019] Figure 2 It is a front view schematic diagram of the U-shaped lifting lug of the present invention in an external hanging state;

[0020] Figure 3 It is a top view schematic diagram of the U-shaped lifting lug of the present invention in a lying state;

[0021] Figure 4 yes Figure 3 AA section structural diagram;

[0022] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle U-shaped lifting eye in external hanging state;

[0023] Figure 6 is a schematic diagram of the top view of the guard plate;

[0024] Figure 7 yes Figure 1 3D schematic diagram of the explosion structure.

[0025] In the figure: 1, cavity wall plate; 2, U-shaped notch; 3, U-shaped lifting ear; 301, outer ear surface; 302, inner ear surface; 303, first limiting part; 4, base; 5, rotating shaft; 6, side block; 7, safety screw; 8, limiting block; 9, central clamping block; 10, torsion spring; 11, fastening screw hole; 12, groove cavity; 13, guard plate; 1301, inclined top folded edge; 14, spring. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction:

[0027] Embodiment 1:

[0028] Combined with Figure 1 , 2 The self-concealed folding ear device described in 7 comprises a U-shaped ear 3, a base 4 installed in the cavity at the bottom, and a cavity wall plate 1 corresponding to the outside of the top of the base 4, the plate surface of the cavity wall plate 1 is provided with a U-shaped hole 2 composed of a horizontal hole and two vertical holes connected, the U-shaped hole 2 can make the cavity wall plate 1 have a smaller opening area, more convenient to manufacture, and the aerodynamic shape of the outer plate surface is more completely preserved, which provides better protection for the interior of the cavity; the U-shaped ear 3 comprises a top horizontal section and two vertical support sections respectively connected to the two ends of the top horizontal section, the two vertical support sections are respectively located in the two vertical holes of the U-shaped hole 2, the bottom end of the vertical support section is rotatably connected to the top of the base 4 through a rotating shaft 5 along the direction of the top horizontal section, so that the U-shaped ear 3 can block the U-shaped hole 2 after it is rotated and laid down from the external hanging state, and the outer ear surface 301 of the U-shaped ear 3 is consistent with the outer plate surface of the cavity wall plate 1, whether the outer plate surface of the cavity wall plate 1 is flat or curved, the U-shaped The outer ear surface 301 of the lifting ear 3 can be designed to be consistent; as needed, the rotating shaft 5 is provided with a torsion spring 10, and the two force arm sections of the torsion spring 10 are respectively connected to the U-shaped lifting ear 3 and the base 4, so that the U-shaped lifting ear 3 has a tendency to lie down, and can be manually erected when the U-shaped lifting ear 3 is mounted. When the mounting is released, the U-shaped lifting ear 3 can automatically lie down under the action of the torsion spring 10; when the U-shaped lifting ear 3 is in a lying state, the torsion spring 10 still has a surplus force to suppress the automatic rebound of the U-shaped lifting ear 3 under the inertial load of autonomous flight. When designing the surplus force, the movement state of the body must be considered to ensure that the lying U-shaped lifting ear will not be lifted up due to the vibration of the body or the influence of airflow in any direction. Generally, the U-shaped lifting ears 3 are designed in pairs, and the lying directions of the two U-shaped lifting ears 3 may be the same or opposite, and may be with the wind or against the wind. In either case, the demand for not automatically rebounding should be met;

[0029] As needed, the inner ear surface 302 and the outer ear surface 301 of the U-shaped ear 3 are both set as inclined surfaces that can form an angle with each other. After the eccentric design, the upper load-bearing body of the ear can be a cone-like shape with two inclined surfaces as a whole, which is more in line with the ear standard and ensures that the interface adaptability remains unchanged. Then, according to the preset lying direction of the U-shaped ear 3, the outer ear surface 301 is curved to meet the requirement of being flush with the fuselage curved surface after lying down. It should be noted that the inclined surface here is not necessarily an inclined plane, but refers to the inclination trend of the overall surface of the outer ear surface 301 relative to the inner ear surface 302. The outer ear surface 301 itself must first meet the aerodynamic requirements; when both the inner ear surface 302 and the outer ear surface 301 are inclined surfaces, only when the rotation center of the design shaft 5 deviates from the angular bisector of the angle can rotation interference be avoided and the requirement of the U-shaped ear 3 to block the U-shaped hole 2 be met. The specific deviation direction is as shown in the attached figure. Figure 1 As shown, the rotation direction deviates by the U-shaped lifting eye.

[0030] As needed, the bottom end of the upright support section corresponds to the side extension of the outer ear surface 301 of the U-shaped lifting ear 3 to form a first limiting portion 303, and the base 4 is provided with a second limiting portion that can correspond to the first limiting portion 303 to make the U-shaped lifting ear 3 have a rotation limit from a lying state to an external hanging state. This limit can not only position the upright external hanging state of the U-shaped lifting ear 3, generally upright at 90 degrees, but also increase the load in the contact direction of the first limiting portion 303. In addition, a limiting block 8 is provided in front of the base 4, which corresponds to the lying state and contacts the inner ear surface 302 of the U-shaped lifting ear 3. The limiting block 8 can position the lying state of the U-shaped lifting ear 3. Specifically, a buffer pad can be provided on the upper surface of the limiting block 8 to reduce the vibration of the U-shaped lifting ear 3 and avoid structural wear.

[0031] Preferably, a central clamping block 9 and two side blocks 6 symmetrically arranged on both sides of the central clamping block 9 are fixed on the top of the base 4, and the central clamping block 9 and the side blocks 6 are respectively provided with coaxial threaded holes and sockets, and a rotating shaft 5 is inserted in the socket of each side block 6. The outer end shaft body of the rotating shaft 5 is sleeved with a torsion spring 10, and the inner end shaft body of the rotating shaft 5 is provided with an external thread adapted to be screwed into the threaded hole, which is generally a fine pitch thread. The bottom ends of the two vertical support sections of the U-shaped ear 3 are respectively and movably inserted into the gaps between the two side blocks 6 and the central clamping block 9, and the bottom ends of the vertical support sections are provided with rotating holes adapted to the rotation of the corresponding shaft bodies of the rotating shaft 5, so as to ensure that the entire rotating structure is easy to install and the U-shaped ear 3 can be adjusted by using the side block 6 and the central clamping block 9. Clamping, increasing the load of the U-shaped lifting ear 3 in the clamping direction, and at the same time, the external pulling load of the U-shaped lifting ear 3 can be increased by increasing the diameter of the rotating shaft 5 and the wall thickness of the rotating hole, the plug hole and the threaded hole; as needed, the outer wall of the side block 6 is provided with a positioning screw hole vertically connected to the plug hole, and the shaft body of the rotating shaft 6 corresponding to the positioning screw hole is provided with a positioning ring groove, and the positioning screw hole is adapted to be screwed with a safety screw 7 for resisting the bottom of the positioning ring groove. The safety screw 7 can prevent the rotating shaft 5 from accidentally withdrawing from the threaded hole of the central clamping block 9. Of course, designing a resistance on the outer end face of the rotating shaft 5 can also achieve the same effect; in addition, a wear-resistant bushing, such as a tin bronze bushing, is installed in the rotating hole to ensure load-bearing while achieving smooth rotation.

[0032] According to needs, the outer surface of the cavity wall plate 1 is detachably installed with a detachable positioning plate for contacting the inner ear surface 302 of the U-shaped lifting ear 3 when in the external hanging state. This is mainly because when manually mounting, there is no need to manually hold the U-shaped lifting ear 3 to maintain the vertical external hanging state, but instead use the detachable positioning plate for contact positioning. After mounting, the detachable positioning plate can be removed.

[0033] When the self-hidden folding ear device described in the present invention is implemented, after the U-shaped ear 3 is assembled, when mounting, it is only necessary to manually rotate and lift the U-shaped ear 3, and then support or use the detachable positioning plate to resist to keep the U-shaped ear 3 in an external hanging state, and then mount and install it. When the mounted object is released during the flight of the aircraft, the U-shaped ear 3 can automatically rotate and lie down through the torsion spring 10 to block the U-shaped hole 2, and keep the aerodynamic shape of the aircraft at this point smooth.

[0034] Embodiment 2:

[0035] As attached Figure 3-6As shown, the difference from the first embodiment is that no additional detachable positioning plate is required to position the U-shaped lifting ear 3 during external loading. Specifically, a groove cavity 12 is provided on the hole wall away from the longitudinal hole of the horizontal bar hole, and a guard plate 13 is slidably inserted in the groove cavity 12. A spring 14 is connected between the inner end of the guard plate 13 and the groove bottom surface of the groove cavity 12. The outer end of the guard plate 13 is configured to extend out of the groove cavity 12 to cover the U-shaped missing hole 2 when the U-shaped lifting ear 3 is in the external hanging state. The U-shaped fork portion contacts the end of the U-shaped lifting ear and is bent obliquely toward the cavity wall plate 1 to form an oblique top folded edge 1 301, the inclined top folding edge 1301 is lower than the outer plate surface of the cavity wall plate 1, and the notch of the groove cavity 12 is provided with a chamfer for accommodating the inclined top folding edge 1301; when the U-shaped lifting ear 3 is rotated and lifted up, under the action of the spring 14, the guard plate 13 extends out of the groove cavity 12, which can not only resist the U-shaped lifting ear 3, but also cover the exposed part of the U-shaped notch 2, thereby improving the cavity protection, and optimizing the aerodynamic shape at this time by blocking the U-shaped notch 2, and when the U-shaped lifting ear 3 releases the carrier and rotates and lies down, it can also automatically push the guard plate 13 back into the groove cavity 12, the design of the inclined top folding edge 1301 can ensure that the guard plate 13 will not be pressed and stuck during the entire process of the U-shaped lifting ear 3 rotating and lying down, and the chamfer of the groove cavity 12 can accommodate the inclined top folding edge 1301, ensuring that there will be no large gap when the U-shaped lifting ear 3 fills the U-shaped missing hole 2; according to needs, the outer plate surface of the cavity wall plate 1 is provided with a corresponding fixing screw hole that passes through the notch of the groove cavity 12, and the fixing screw hole 11 is equipped with a countersunk screw 11 for screwing the contact guard plate 13. When the U-shaped lifting ear 3 is loaded and erected, the lying force of the torsion spring 10 is definitely large The U-shaped lifting ear 3 is due to the external thrust of the spring 14, otherwise the guard plate 13 cannot be automatically pushed back when it lies down. Therefore, when the U-shaped lifting ear 3 is loaded with hanging objects, the countersunk screw 11 can be tightened to press the guard plate 13, so that the guard plate 13 can be positioned against the U-shaped lifting ear 3 without the need to hold the U-shaped lifting ear 3 additionally. After the loading is completed, the countersunk screw 11 can be loosened; of course, if you do not want to use the guard plate 13 during the whole process, you can also tighten the countersunk screw 11 when the guard plate 13 is retracted into the groove cavity 12, and the guard plate 13 can be left in the groove cavity 12 without being used.

[0036] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A self-hidden folding ear device, characterized by: The invention comprises a U-shaped lifting ear (3), a base (4) whose bottom is installed in the cavity, and a cavity wall plate (1) corresponding to the outside of the top of the base (4), wherein the plate surface of the cavity wall plate (1) is provided with a U-shaped hole (2) composed of a horizontal hole and two vertical holes connected to each other; the U-shaped lifting ear (3) comprises a top horizontal section and two vertical support sections respectively connected to the two ends of the top horizontal section, the two vertical support sections are respectively located in the two vertical holes of the U-shaped hole (2), and the bottom end of the vertical support section is rotatably connected to the top of the base (4) via a rotating shaft (5) along the direction of the top horizontal section, so that the U-shaped lifting ear (3) can be rotated from the outside After rotating and lying down in the hanging state, the U-shaped missing hole (2) can be blocked, and the outer ear surface (301) of the U-shaped lifting ear (3) is aligned with the outer plate surface of the cavity wall plate (1); the rotating shaft (5) is sleeved with a torsion spring (10), and the two force arm sections of the torsion spring (10) are respectively connected to the U-shaped lifting ear (3) and the base (4) to make the U-shaped lifting ear (3) have a tendency to lie down; the inner ear surface (302) and the outer ear surface (301) of the U-shaped lifting ear (3) are both set as inclined surfaces that can form an angle with each other, and the rotation center of the rotating shaft (5) deviates from the angular bisector of the angle.

2. The self-hidden folding ear device according to claim 1 is characterized in that: When the U-shaped lifting eye (3) is in a lying state, the torsion spring (10) still has a surplus force to suppress the U-shaped lifting eye (3) from automatically bouncing up.

3. The self-hidden folding ear device according to claim 1 is characterized in that: A central clamping block (9) and two side blocks (6) symmetrically arranged on both sides of the central clamping block (9) are fixed on the top of the base (4); the central clamping block (9) and the side blocks (6) are respectively provided with coaxial threaded holes and insertion holes; a rotating shaft (5) is inserted into the insertion hole of each side block (6); a torsion spring (10) is sleeved on the outer end shaft body of the rotating shaft (5); an inner end shaft body of the rotating shaft (5) is provided with an external thread adapted to be screwed into the threaded hole; the bottom ends of the two vertical support sections of the U-shaped lifting ear (3) are respectively and movably inserted into the gaps between the two side blocks (6) and the central clamping block (9); and the bottom ends of the vertical support sections are provided with a rotating hole adapted to be rotated through by the corresponding shaft body of the rotating shaft (5).

4. The self-hidden folding ear device according to claim 3 is characterized in that: The outer wall of the edge block (6) is provided with a positioning screw hole which is vertically connected to the insertion hole, and the shaft body of the rotating shaft (6) corresponding to the positioning screw hole is provided with a positioning ring groove, and a safety screw (7) adapted to be screwed in the positioning screw hole for resisting the bottom of the positioning ring groove is provided.

5. The self-hidden folding ear device according to claim 3 is characterized in that: A wear-resistant bushing is installed in the rotating hole.

6. The self-hidden folding ear device according to claim 1 is characterized in that: A limiting block (8) is provided in front of the base (4) for contacting the inner ear surface (302) of the U-shaped lifting ear (3) when the base (4) is in a lying state; a buffer pad is provided on the upper surface of the limiting block (8).

7. The self-hidden folding ear device according to claim 1 is characterized in that: The outer plate surface of the cavity wall plate (1) is detachably mounted with a detachable positioning plate for contacting the inner ear surface (302) of the U-shaped lifting ear (3) in an external hanging state.

8. The self-hidden folding ear device according to claim 1 is characterized in that: The bottom end of the upright support section corresponds to the side extension of the outer ear surface (301) of the U-shaped lifting ear (3) to form a first limiting portion (303), and the base (4) is provided with a second limiting portion that can correspond to the first limiting portion (303) so that the U-shaped lifting ear (3) has a rotation limit from a lying state to an external hanging state.

9. The self-hidden folding ear device according to claim 1, characterized in that: A groove cavity (12) is provided on the hole wall of the transverse hole away from the longitudinal hole, a guard plate (13) is slidably inserted in the groove cavity (12), a spring (14) is connected between the inner end of the guard plate (13) and the groove bottom surface of the groove cavity (12), the outer end of the guard plate (13) is configured to be a U-shaped fork portion that can extend out of the groove cavity (12) to cover the U-shaped missing hole (2) when the U-shaped ear (3) is in an external hanging state, the U-shaped fork portion contacts the end of the U-shaped ear and is bent obliquely toward the outside of the cavity wall plate (1) to form an oblique top folded edge (1301), the oblique top folded edge (1301) is lower than the outer plate surface of the cavity wall plate (1), and a chamfer for accommodating the oblique top folded edge (1301) is provided at the notch of the groove cavity (12).

10. The self-hidden folding ear device according to claim 9, characterized in that: The outer plate surface of the cavity wall plate (1) is provided with a fixing screw hole corresponding to the notch of the groove cavity (12), and the fixing screw hole (11) is provided with a countersunk screw (11) for screwing the abutment guard plate (13).

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