Tension connecting piece with weak point protection

Abstract

The utility model belongs to the technical field of aircraft testing, and particularly relates to a tensile connecting piece with weak point protection, the tensile connecting piece (1) is of a rod type structure, the middle of the rod type structure is provided with a weak part (11) which can be snapped under a preset tensile force, the two sides of the weak part (11) of the rod type structure are respectively provided with a straight section, the straight sections are provided with planes, and the plane is provided with a plane. The sleeve (2) is arranged on the tension connecting piece (1) in a sleeving manner and at least covers the weak part (11) and the straight sections on the two sides, the two ends of the sleeve (2) are provided with binding faces parallel to the plane, and after the binding faces are attached to the planes of the straight sections, the sleeve (2) is connected with the two straight sections through fasteners (3). The device is simple in structure and convenient to mount, and can protect the tensile connecting piece from being broken in advance due to the influence of bending moment and torque.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aircraft testing, and particularly relates to a tension connection with weak point protection. BACKGROUND

[0002] In the testing of an aircraft device, a tension connection is installed on the original platform structure to test the force, displacement and other parameters of the relevant structure. A simple, light and reliable tension connection plays a key role in the transmission of force and displacement in the engineering application field. However, in many engineering fields, due to the limitations of the installation position space and the characteristics of the platform structure, once excessive stress is applied, the platform structure will be damaged, which will cause serious consequences. Therefore, a weak point is arranged on the tension connection to make the connection break immediately when the predetermined breaking force value is reached, so as to effectively protect the platform structure.

[0003] In the process of daily disassembly, maintenance and use, it is found that the weak point of the tension connection is often damaged and broken in advance due to additional bending moment or torque, and the predetermined breaking force value has not been reached at this time, so the inherent function of testing force, displacement and other parameters cannot be normally realized. Therefore, the protection of the weak point is particularly important. The conventional measure is to design the weak point to be stronger, but this often leads to the breaking force value of the weak point exceeding the standard, and the protection of the platform structure cannot be achieved. CONTENT OF THE INVENTION

[0004] In order to solve the above problems, the present application provides a tension connection with weak point protection to solve the problems of weak mechanical environment resistance of the weak point of the tension connection, accidental breakage caused by bending moment, torque and other external forces in the process of installation and use, and the like.

[0005] The tension connection with weak point protection provided by the present application is a rod structure, the middle of the rod structure has a weak part that can be broken under a predetermined tension, and one flat section is arranged on each side of the weak part. The flat section is machined with a flat surface, a sleeve is sleeved on the tension connection and covers at least the weak part and the flat sections on both sides, the two ends of the sleeve have a fitting surface parallel to the flat surface, and the fitting surface is fitted on the flat surface of the flat section and connected to the two flat sections through fasteners respectively.

[0006] Preferably, the weak part is an arc-shaped section with a reduced radial dimension.

[0007] Preferably, the flat section is formed by milling.

[0008] Preferably, the flat section on either side of the weak part includes two flat surfaces that are symmetrical.

[0009] Preferably, the fitting surface of the sleeve and the plane of the flat section of the tension connector are preformed with mounting through holes.

[0010] Preferably, the fastener is a rivet.

[0011] The present application has simple structure and is easy to install, and can protect the tension connector from being broken in advance due to the bending moment and the torsion moment. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of a preferred embodiment of the tension connector with weak point protection of the present application.

[0013] In the figure, 1 is a tension connector, 11 is a weak part, 2 is a sleeve, and 3 is a fastener. DETAILED DESCRIPTION

[0014] To make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in more detail below in combination with the drawings of the embodiments of the present application. In the drawings, the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, but not all of the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, but cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0015] The present application provides a tension connector with weak point protection, as shown in Figure 1 The tension connector 1 is a rod structure, the rod structure has a weak part 11 capable of being broken under a preset tension in the middle, and a flat section is arranged on each side of the weak part 11, a sleeve 2 is sleeved on the tension connector 1 and covers at least the weak part 11 and the flat sections on both sides, both ends of the sleeve 2 have a fitting surface parallel to the plane, and after being fitted on the plane of the flat section, the sleeve 2 is connected to the two flat sections by fasteners 3.

[0016] The inner and outer planes of the sleeve 2 of the present application and the flat section planes of the tension connector 1 are parallel to each other and need to meet the design requirement of the gap fit tolerance. The present application strengthens the bending moment and torsion moment resistance of the tension connector through the sleeve 2, so as to protect the weak part 11 of the tension connector from being affected by the bending moment or the torsion moment, and does not increase the breaking force value of the weak part.

[0017] In some alternative embodiments, the weak part 11 is an arc-shaped section with reduced radial dimension. In this embodiment, referring to Figure 1 , the weak part 11 has the smallest radial dimension in the middle and transitions to other parts of the rod structure through an arc shape. The design of the weak part 11 enables the tensile connector to bear the required axial tension.

[0018] In some alternative embodiments, the flat section is formed by milling. Multiple planes can be milled along the circumference of the flat section.

[0019] In some alternative embodiments, the flat section on either side of the weak part 11 includes two symmetric planes. In this embodiment, the flat section is connected to the sleeve 2 by the fastener 3 that penetrates the flat section. Therefore, the flat section has at least two symmetric planes to mate with the sleeve 2 that also has a mating surface parallel to the planes.

[0020] In some alternative embodiments, the mating surface of the sleeve 2 and the planes of the flat section of the tensile connector 1 are pre-fabricated with mounting through holes. The fastener is installed in the through holes to fix the sleeve 2 and the tensile connector 1.

[0021] In some alternative embodiments, the fastener is a rivet that penetrates the sleeve 2 and the tensile connector 1 to achieve effective fixation.

[0022] The present application can effectively prevent the weak point of the tensile connector from accidentally breaking due to external factors such as bending moment and torque, and can also break only under the condition of a predetermined breaking force, effectively protecting the platform structure from damage. The present application effectively solves the problem of weak mechanical environmental resistance of the weak point of the tensile connector, accidental breaking due to external factors such as bending moment and torque during installation and use, and other problems. The design is simple and effective, easy and fast to operate, and has good versatility.

[0023] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tension link having a weak point protection, characterized in that The tensile connector (1) is a rod structure, the middle of the rod structure has a weak position (11) capable of being pulled off under a preset tension, both sides of the weak position (11) of the rod structure are respectively provided with a flat section, the flat section is processed with a plane, a sleeve (2) is sleeved on the tensile connector (1) and covers at least the weak position (11) and the flat sections on both sides, both ends of the sleeve (2) have a fitting surface parallel to the plane and are fitted on the plane of the flat sections and are connected with the two flat sections through fasteners (3) respectively.

2. The tension link having a weak point protection of claim 1, wherein, The weak position (11) is an arc section with a reduced radial dimension.

3. The tension link having a weak point protection of claim 1, wherein, The flat sections are formed by milling.

4. The tension link having a weak point protection of claim 1, wherein, The flat sections on either side of the weak position (11) include two planes symmetrical in up and down.

5. The tension link having a weak point protection of claim 1, wherein, The fitting surface of the sleeve (2) and the plane of the flat sections of the tensile connector (1) are preformed with mounting through holes.

6. The tension link having a weak point protection of claim 5, wherein, The fastener is a rivet.

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