External anti-rotation device of helicopter

Abstract

The utility model discloses an external anti-rotation device of a helicopter, which comprises a shell and a rotating cylinder, and an inner cylinder is integrally connected inside the shell. The hanging ring has the advantages that the rotating cylinder and the inner cylinder are adopted, the annular groove is formed in the top face of the inner cylinder, the balls are connected into the annular groove in a rolling mode, and the balls are steel balls and abut against the inner top face of the rotating cylinder in a rolling mode. When a helicopter hangs goods, the hanging ring is fixedly connected with a helicopter sling, the goods are hung on the hook, and the weight of the goods is transmitted to the rotating cylinder through the hanging rod; the first bearing and the second bearing are transmitted to the balls through the rotating cylinder and transmitted to the inner cylinder and the shell through the balls, so that the bearing effect is achieved, the situation that the first bearing and the second bearing are damaged due to large axial force is avoided, the service life is prolonged, the bearing capacity is improved, and meanwhile the rotating smoothness of the first bearing and the second bearing is guaranteed; and the hanging rod and the rotating cylinder can rotate freely, so that the helicopter sling is prevented from rotating, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of helicopter external hanging and transportation, in particular to a helicopter external hanging anti-rotation device. Background Art

[0002] Helicopter external lifting is a common mode of transportation service, which is widely used in military and civilian fields. When the helicopter is flying, the external objects are easily affected by gravity load and wind load, which increases the difficulty of external lifting. In order to ensure the stability of helicopter external lifting, it is necessary not only to standardize the operation of external lifting, but also to pay attention to the application of lifting technology to ensure the safety of helicopter external lifting.

[0003] After searching, it was found that the publication number is CN207374678U, and the name is a helicopter external anti-rotation device. The application points out the shortcomings of the existing helicopter external lifting: the cargo is generally fixedly lifted by a sling assembly, but during the flight of the helicopter, the cargo is affected by the wind, and the sling assembly will continuously rotate the cargo in the air, so a large rotational force is generated in the sling, and the rotational force has a great influence on the later use of the sling assembly, thereby greatly affecting the service life of the sling assembly. The sling assembly hung on the lower hook can be rotated with the influence of wind force by the swivel bearing arranged on the chassis, and the rotation of the swivel bearing reduces the rotation of the sling, so that a large rotational force will not be generated on the sling. The service life of the sling is extended, and the connecting piece arranged on the lower hook can close the opening on the lower hook. Since the connecting piece is connected to the retaining spring through a rotating pin, when opening the opening on the lower hook, it is only necessary to press the connecting piece. After hanging the sling, the connecting piece is released, and the connecting piece is quickly reset under the action of the retaining spring, thereby realizing the closure of the opening of the lower hook. However, this application adopts a rotating bearing as a rotating connecting piece. Since the limiting strength of the bearing for axial movement is limited, when the weight of the cargo is heavy, the strong axial force will seriously damage the bearing components, causing greater wear and tear, affecting the service life and work safety, and further improvements can be made. At the same time, the lateral swing of the cargo will also affect the stability of the sling, and further improvements can be made.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a helicopter external anti-rotation device, which has the advantages of extending service life and safety, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above advantages of extended service life and safety, the specific technical solutions adopted by the utility model are as follows:

[0009] A helicopter external anti-rotation device comprises an outer shell and a rotating cylinder, wherein an inner cylinder is integrally connected to the inside of the outer shell, and a rotating cylinder is installed between the outer shell and the inner cylinder, and a hanging rod is fixedly connected to the central axis position of the rotating cylinder, the hanging rod passes through the inner cylinder and is fixedly connected to a hook, and the hanging rod is rotatably connected to the inner cylinder through a second bearing, and the inner cylinder is rotatably connected to the rotating cylinder through a first bearing, an annular groove is provided on the top surface of the inner cylinder, and a ball is rollingly connected inside the annular groove, and the ball is rollingly abutted against the inner top surface of the rotating cylinder, a ball seat is fixedly connected to the top surface of the outer shell, and a ball is rollingly connected inside the ball seat, and a connecting rod is welded to the surface of the ball, and the other end of the connecting rod is fixedly connected to a hanging ring.

[0010] Furthermore, the ball seat, the rolling ball, the outer shell, the inner cylinder, and the rotating cylinder are coaxially arranged, and the inner cylinder, the first bearing, and the second bearing are coaxially arranged.

[0011] Furthermore, there are a plurality of balls distributed at equal angles along the central axis of the shell, and the balls are steel balls.

[0012] Furthermore, the inner height of the ball seat is greater than the radius of the rolling ball, and the top diameter of the ball seat is smaller than the diameter of the rolling ball.

[0013] Furthermore, the annular groove is coaxially arranged with the hanging rod, and the depth of the annular groove is smaller than the radius of the ball.

[0014] Furthermore, an annular groove is also provided on the inner top surface of the rotating cylinder.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a helicopter external anti-rotation device, which has the following beneficial effects:

[0017] (1) The utility model adopts a rotating cylinder and an inner cylinder. The top surface of the inner cylinder is provided with an annular groove. Balls are rollingly connected inside the annular groove. The balls are steel balls and rollingly abut against the top surface of the rotating cylinder. When the helicopter is hanging cargo, the hanging ring is fixedly connected to the helicopter sling, and the cargo is hung on the hook. The weight of the cargo is transmitted to the rotating cylinder through the hanging rod, and then to the balls through the rotating cylinder, and then to the inner cylinder and the outer shell through the balls, and then to the helicopter. The balls play a bearing role, avoiding the first bearing and the second bearing from being damaged by a large axial force, extending the service life, increasing the load capacity, and ensuring the smooth rotation of the first bearing and the second bearing, so that the hanging rod and the rotating cylinder can rotate freely, avoiding the helicopter sling from rotating, and improving the safety of use.

[0018] (2) The utility model adopts a ball seat and a rolling ball. The rolling ball rolls inside the ball seat. When the cargo swings, the ball seat and the rolling ball rotate relative to each other, thereby avoiding the impact of the cargo swing on the sling, further reducing the adverse impact on the sling, and further improving the safety and stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the internal structure of a helicopter external anti-rotation device proposed by the utility model;

[0021] Figure 2 This is a schematic diagram of the external structure of a helicopter external anti-rotation device proposed by the utility model;

[0022] Figure 3 It is a schematic diagram of the external structure of the rotating drum proposed by the utility model;

[0023] Figure 4 It is an AA cross-sectional view of a helicopter external anti-rotation device proposed by the utility model.

[0024] In the figure:

[0025] 1. Outer shell; 2. Inner cylinder; 3. Rotating cylinder; 4. Hanging rod; 5. Hook; 6. First bearing; 7. Second bearing; 8. Ball; 9. Ball seat; 10. Ball; 11. Connecting rod; 12. Hanging ring; 13. Ring groove. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the utility model, a helicopter external anti-rotation device is provided.

[0028] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4As shown, according to an embodiment of the utility model, a helicopter external anti-rotation device comprises an outer shell 1 and a rotating cylinder 3, wherein an inner cylinder 2 is integrally connected to the inner shell 1, and a rotating cylinder 3 is installed between the outer shell 1 and the inner cylinder 2, and a hanging rod 4 is fixedly connected to the central axis position of the rotating cylinder 3, the hanging rod 4 passes through the inner cylinder 2 and is fixedly connected to a hook 5, and the hanging rod 4 is rotatably connected to the inner cylinder 2 through a second bearing 7, and the inner cylinder 2 is rotatably connected to the rotating cylinder 3 through a first bearing 6, an annular groove 13 is provided on the top surface of the inner cylinder 2, and a ball 8 is rollingly connected inside the annular groove 13, and the ball 8 is rollingly abutted against the inner top surface of the rotating cylinder 3, a ball seat 9 is fixedly connected to the top surface of the outer shell 1, and a ball 10 is rollingly connected inside the ball seat 9, and a connecting rod 11 is welded to the surface of the ball 10, and a hanging ring 12 is fixedly connected to the other end of the connecting rod 11. When the helicopter is hanging cargo, the hanging ring 1 2 is fixedly connected to the helicopter sling, and the cargo is hung with the hook 5. The weight of the cargo is transferred to the rotating cylinder 3 through the hanging rod 4, and then to the ball 8 through the rotating cylinder 3, and then to the inner cylinder 2 and the outer shell 1 through the ball 8, and then to the helicopter. The ball 8 plays a bearing role, avoiding the first bearing 6 and the second bearing 7 from being damaged by a large axial force, extending the service life, improving the load capacity, and ensuring the smoothness of the rotation of the first bearing 6 and the second bearing 7, so that the hanging rod 4 and the rotating cylinder 3 can rotate freely, avoiding the self-rotation of the helicopter sling, and improving the safety of use. At the same time, the ball 10 rolls inside the ball seat 9. When the cargo swings, the ball seat 9 and the ball 10 rotate relative to each other, thereby avoiding the swing of the cargo to affect the sling, further reducing the adverse effects on the sling, and further improving the safety and stability of use.

[0029] In one embodiment, the ball seat 9, the rolling ball 10, the outer shell 1, the inner cylinder 2, and the rotating cylinder 3 are coaxially arranged, and the inner cylinder 2, the first bearing 6, and the second bearing 7 are coaxially arranged, which improves the stability of rotation.

[0030] In one embodiment, a plurality of balls 8 are distributed at equal angles along the central axis of the housing 1, and the balls 8 are steel balls, which have a stable structure and high strength, thereby improving the bearing capacity and rotation stability.

[0031] In one embodiment, the inner height of the ball seat 9 is greater than the radius of the rolling ball 10, and the top diameter of the ball seat 9 is smaller than the diameter of the rolling ball 10, so as to prevent the rolling ball 10 from falling off.

[0032] In one embodiment, the annular groove 13 is coaxially arranged with the hanging rod 4, and the depth of the annular groove 13 is smaller than the radius of the ball 8, wherein the inner top surface of the rotating cylinder 3 is also provided with an annular groove 13 to prevent the ball 8 from falling off.

[0033] Working principle:

[0034] When the helicopter is hanging cargo, the hanging ring 12 is fixedly connected to the helicopter sling, and the cargo is hung on the hook 5. The weight of the cargo is transmitted to the rotating cylinder 3 through the hanging rod 4, and then to the ball 8 through the rotating cylinder 3, and then to the inner cylinder 2 and the outer shell 1 through the ball 8, and then to the helicopter. The ball 8 plays a load-bearing role to prevent the first bearing 6 and the second bearing 7 from being damaged by a large axial force, thereby extending the service life, increasing the load capacity, and ensuring the smooth rotation of the first bearing 6 and the second bearing 7, so that the hanging rod 4 and the rotating cylinder 3 can rotate freely, avoiding the helicopter sling from rotating, and improving the safety of use. At the same time, the ball 10 rolls inside the ball seat 9. When the cargo swings, the ball seat 9 and the ball 10 rotate relative to each other, thereby preventing the swing of the cargo from affecting the sling, further reducing the adverse effects on the sling, and further improving the safety and stability of use.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A helicopter external anti-rotation device, characterized in that: The invention comprises an outer shell (1) and a rotating cylinder (3), wherein the inner cylinder (2) is integrally connected to the inner shell (1), and the rotating cylinder (3) is installed between the outer shell (1) and the inner cylinder (2) and located inside the outer shell (1), and a hanging rod (4) is fixedly connected to the central axis of the rotating cylinder (3), and the hanging rod (4) passes through the inner cylinder (2) and is fixedly connected to a hook (5), and the hanging rod (4) is rotatably connected to the inner cylinder (2) via a second bearing (7), and the inner cylinder (2) is fixedly connected to the inner cylinder (2) via a first bearing (6) is rotatably connected to the rotating cylinder (3), the top surface of the inner cylinder (2) is provided with an annular groove (13), and a ball (8) is rollingly connected inside the annular groove (13), and the ball (8) is rollingly abutted against the top surface of the rotating cylinder (3), the top surface of the outer shell (1) is fixedly connected with a ball seat (9), and a ball (10) is rollingly connected inside the ball seat (9), and a connecting rod (11) is welded to the surface of the ball (10), and the other end of the connecting rod (11) is fixedly connected with a hanging ring (12).

2. The helicopter external anti-rotation device according to claim 1, characterized in that: The ball seat (9), the rolling ball (10), the outer shell (1), the inner cylinder (2), and the rotating cylinder (3) are coaxially arranged, and the inner cylinder (2), the first bearing (6), and the second bearing (7) are coaxially arranged.

3. The helicopter external anti-rotation device according to claim 1, characterized in that: A plurality of the balls (8) are distributed at equal angles along the central axis of the housing (1), and the balls (8) are steel balls.

4. The helicopter external anti-rotation device according to claim 1, characterized in that: The inner height of the ball seat (9) is greater than the radius of the rolling ball (10), and the top diameter of the ball seat (9) is smaller than the diameter of the rolling ball (10).

5. The helicopter external anti-rotation device according to claim 1, characterized in that: The annular groove (13) is coaxially arranged with the hanging rod (4), and the depth of the annular groove (13) is smaller than the radius of the ball (8).

6. The helicopter external anti-rotation device according to claim 1, characterized in that: The inner top surface of the rotating cylinder (3) is also provided with an annular groove (13).

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