Length-adjustable steel wire rope hoisting structure

Abstract

The invention belongs to the technical field of airplane strength design, and particularly relates to a length-adjustable steel wire rope hoisting structure which comprises a first pulley assembly, a second pulley assembly, a third pulley assembly and a steel wire rope. Wherein the first pulley assembly is provided with a first joint and a roller, the second pulley assembly is provided with a second joint and a roller, and the third pulley assembly is provided with a third joint and a roller; one end of the steel wire rope is fixed on the first joint, sequentially wound on the second pulley assembly, the first pulley assembly and the third pulley assembly and then fixed on the second joint; wherein the first connector is connected with a hoisting device, the third connector is connected with a hoisted device, the design of a length-adjustable hoisting structure is realized by adopting a structure that a pulley is matched with a steel wire rope, the weight of the hoisting structure is reduced, the mounting risk is reduced, and the working efficiency of length adjustment is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft strength design, and in particular relates to a length-adjustable steel wire rope hoisting structure. Background Art

[0002] In the static strength and fatigue strength tests of aircraft structures, length-adjustable hoisting equipment is a commonly used test equipment. The length-adjustable hoisting equipment currently used in the test is a hand chain hoist. However, for the hoisting of some light test equipment (such as levers, etc.), there are some obvious disadvantages if a hand chain hoist is used for hoisting. First, the hand chain hoist is heavy, which increases the difficulty of installation; second, in most cases, the location of the hoisting equipment is located directly above the aircraft structure. The use of a heavy hand chain hoist greatly increases the risk during the equipment installation process and poses certain hidden dangers to aircraft safety; third, the hand chain hoist uses a reduction gear set to adjust the hoisting length, and it is often necessary to pull a long distance of the manual chain to adjust to the appropriate length. For equipment that is light and only requires to be kept at a certain height, such as levers, it is not convenient to use a manual hoist. Summary of the invention

[0003] In order to solve the above problems, the present application provides a length-adjustable wire rope hoisting structure, comprising:

[0004] A first pulley assembly, a second pulley assembly, a third pulley assembly and a wire rope;

[0005] Among them, the first pulley assembly has a first joint and a roller, the second pulley assembly has a second joint and a roller, and the third pulley assembly has a third joint and a roller; one end of the wire rope is fixed on the first joint, and is fixed to the second joint after being wound around the second pulley assembly, the first pulley assembly, and the third pulley assembly in sequence; wherein the first joint is connected to the lifting device, and the third joint is connected to the lifted device.

[0006] Preferably, one end of the first joint has a U-shaped winding channel and the other end is a double-ear structure for mounting rollers, one end of the wire rope enters from the inlet of the U-shaped winding channel and extends from the outlet of the U-shaped winding channel.

[0007] Preferably, one end of the second joint has a U-shaped winding channel and the other end is a double-ear structure for mounting rollers, one end of the wire rope enters from the inlet of the U-shaped winding channel and extends from the outlet of the U-shaped winding channel.

[0008] Preferably, the end of the double-ear structure of the first joint has a through hole, and the through hole is connected with a bolt for connecting with the lifting device.

[0009] Preferably, the end of the double-ear structure of the second joint has a through hole, and the through hole is connected with a bolt for connecting with the hoisted device.

[0010] Preferably, there is an angle between the inlet axis and the outlet axis of the U-shaped winding channel.

[0011] Preferably, when the hoisting structure is hoisted, the inlet axis is parallel to the vertical, and the outlet axis has a self-locking angle with the vertical.

[0012] The advantages of the present application include: adopting a structure in which a pulley and a steel wire rope cooperate to realize the design of a hoisting structure with adjustable length, reducing the weight of the hoisting structure, reducing installation risks, and improving the efficiency of the length adjustment work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a preferred embodiment of the present application before length adjustment;

[0014] Figure 2 This is a schematic diagram of a preferred embodiment of the present application after length adjustment;

[0015] Figure 3 This is a schematic diagram of a length-adjustable wire rope hoisting structure according to a preferred embodiment of the present application;

[0016] Figure 4 This is a schematic diagram of the first joint in a preferred embodiment of the present application;

[0017] Figure 5 This is a schematic diagram of the second joint in a preferred embodiment of the present application;

[0018] Figure 6 This is a schematic diagram of the third joint in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0020] In order to solve the above problems, the present application provides a length-adjustable wire rope hoisting structure, such as Figure 3-Figure 4 As shown, including:

[0021] A first pulley assembly 1, a second pulley assembly 2, a third pulley assembly 3 and a wire rope 7;

[0022] Among them, the first pulley assembly 1 has a first joint 4 and a roller, the second pulley assembly 2 has a second joint 5 and a roller, and the third pulley assembly 3 has a third joint 6 and a roller; one end of the wire rope 7 is fixed on the first joint 4, and is successively wound around the second pulley assembly 2, the first pulley assembly 1, and the third pulley assembly 3 and then fixed to the second joint 5; wherein the first joint 4 is connected to the lifting device, and the third joint 6 is connected to the lifted device.

[0023] like Figure 1 Points A and B in the figure are two lifting points, the thick dotted line is the wire rope, and the wire rope is wound around three pulleys as shown in the figure. The triangle position in the figure indicates that the end of the wire rope is fixed to the pulley center axis structure.

[0024] like Figure 1 As shown, the initial position is Figure 1 As shown in the left figure, the distance between the two suspension points A and B is N, and the distance between the centers of the second pulley assembly 2 and the third pulley assembly 3 is M. At this time, the length relationship satisfies LC=2N+ML, which is the total length of the wire rope, and C is the sum of the semi-circumferences of the three pulleys; after the length is adjusted, Figure 1 As shown in the right figure, the distance between the two suspension points A and B is N', and the center distance between the second pulley assembly 2 and the third pulley assembly 3 is M'. At this time, the length relationship satisfies LC = 2N' + M'. As can be seen from the figure, adjusting the length of M can adjust the length of N. The length between the suspension points A and B can be adjusted by adjusting the position of the joint 2, thereby achieving length adjustment.

[0025] Preferably, the first joint 4 has a U-shaped winding channel at one end and a double-ear structure for mounting rollers at the other end, and the wire rope 7 enters from the inlet of the U-shaped winding channel and extends from the outlet of the U-shaped winding channel. The second joint 5 has a U-shaped winding channel at one end and a double-ear structure for mounting rollers at the other end, and the wire rope 7 enters from the inlet of the U-shaped winding channel and extends from the outlet of the U-shaped winding channel. The U-shaped winding channel is formed by wedge blocks 8 and 9, and its structure forms a self-locking structure of the wire rope 7, so that the wire rope cannot escape by pulling force.

[0026] Preferably, the end of the double-ear structure of the first joint 4 has a through hole, and the through hole is connected to a bolt for connecting to a lifting device, and the end of the double-ear structure of the second joint 5 has a through hole, and the through hole is connected to a bolt for connecting to a lifted device.

[0027] Preferably, there is an angle between the inlet axis and the outlet axis of the U-shaped winding channel. When the hoisting structure is hoisted, the inlet axis is parallel to the vertical direction, and the outlet axis has a self-locking angle with the vertical direction.

[0028] The advantages of the present application include: adopting a structure in which a pulley and a steel wire rope cooperate to realize the design of a hoisting structure with adjustable length, reducing the weight of the hoisting structure, reducing installation risks, and improving the efficiency of the length adjustment work.

[0029] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A length-adjustable wire rope hoisting structure, characterized in that: include: A first pulley assembly (1), a second pulley assembly (2), a third pulley assembly (3) and a steel wire rope (7); The first pulley assembly (1) has a first joint (4) and a roller, the second pulley assembly (2) has a second joint (5) and a roller, and the third pulley assembly (3) has a third joint (6) and a roller; one end of the steel wire rope (7) is fixed to the first joint (4), and is successively wound around the second pulley assembly (2), the first pulley assembly (1), and the third pulley assembly (3) before being fixed to the second joint (5); the first joint (4) is connected to a hoisting device, and the third joint (6) is connected to a hoisted device.

2. The length-adjustable steel wire rope hoisting structure according to claim 1, characterized in that: One end of the first joint (4) is provided with a U-shaped winding channel and the other end is a double-ear structure for mounting rollers. One end of the steel wire rope (7) enters from the inlet of the U-shaped winding channel and extends from the outlet of the U-shaped winding channel.

3. The length-adjustable steel wire rope hoisting structure according to claim 1, characterized in that: One end of the second joint (5) is provided with a U-shaped winding channel and the other end is a double-ear structure for mounting rollers. One end of the steel wire rope (7) enters from the inlet of the U-shaped winding channel and extends from the outlet of the U-shaped winding channel.

4. The length-adjustable steel wire rope hoisting structure according to claim 1, characterized in that: The double-ear structure end of the first joint (4) has a through hole, and the through hole is connected with a bolt for connecting with the lifting device.

5. The length-adjustable steel wire rope hoisting structure according to claim 1, characterized in that: The end of the double-ear structure of the second joint (5) is provided with a through hole, and the through hole is connected with a bolt for connecting with the hoisted device.

6. The length-adjustable steel wire rope hoisting structure as claimed in claim 3, characterized in that: There is an angle between the inlet axis and the outlet axis of the U-shaped winding channel.

7. The length-adjustable steel wire rope hoisting structure as claimed in claim 3, characterized in that: When the hoisting structure is hoisted, the inlet axis is parallel to the vertical, and the outlet axis has a self-locking angle with the vertical.

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