A clip-type loading lever

Abstract

The present application belongs to the technical field of aircraft strength test, and particularly relates to a clip-type loading lever. The device comprises a lever body (4), a resultant bolt (12), a secondary lever bolt (9) and a secondary bushing (2); wherein the lever body (4) comprises two clips, the middle of which is connected by a resultant bolt (12), the first end of each clip is provided with a circular hole (1), and the second end is provided with a strip hole (7), the first ends of the two clips are connected by a secondary lever bolt (9) and a secondary bushing (2) passing through the circular hole (1), and the second ends of the two clips are connected by another secondary lever bolt (14) and another secondary bushing (8) passing through the strip hole (7). The present application realizes the self-adaptation of the top lever to the deformation of the secondary lever and the test piece, ensures that the loading system does not limit the deformation of the test piece, and increases the loading accuracy of the lever system.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft strength testing, and in particular relates to a clip-type loading lever. Background Art

[0002] During the ground verification test of structural strength, the top lever is connected to the actuator through a single ear / double ear, transferring the actuator load to the secondary lever system and tension and compression pads for load application. It is the top-level lever.

[0003] There are two main types of top-loading levers available. One is an M-shaped top-loading lever, connected to the secondary lever via grooves on its bottom surfaces at both ends. The angle between the M-shaped top-loading lever and the secondary lever is generally between 50° and 90°, influenced by the width of the grooves in the main body. The other is a jujube-shaped, overlapping top-loading lever, with two ears at each end designed to overlap the secondary lever. The top lever is taller than the secondary lever to prevent interference in the same space.

[0004] For a typical tension and compression pad-lever system where the tension and compression pads are distributed in a line, the installation angle of each lever is close to 0°. The original M-shaped top lever cannot meet the installation requirements of this scenario. The top lever in the form of a jujube-shaped overlap meets the requirements for loading with installation angles of levers at all levels close to 0°, but the lever system that is gradually raised will reduce the overall load stability of the lever system. The two ears fixed at both ends also limit the movement of the secondary lever along the axial direction of the top lever, thereby limiting the deformation of the test piece and affecting the loading accuracy of the lever system. Therefore, for this typical tension and compression pad-lever system where the tension and compression pads are in a line, the original top lever still needs to be improved to obtain greater stability and higher loading accuracy. Summary of the Invention

[0005] In order to solve the above technical problems, the present application proposes a clip-type loading lever, which improves the structural form and connection form of the top lever, thereby increasing the structural stability and loading accuracy of the entire lever system.

[0006] The clip-type loading lever provided in this application mainly includes a lever body, a force-resulting point bolt, a force-resulting point inclined bushing, a secondary lever bolt and a secondary bushing;

[0007] Among them, the lever body includes two relatively arranged sheet-type plate-like structure clips, each of which has a main mounting hole in the middle of the clip, and the two clips are connected by a combined force point bolt arranged in the main mounting hole. The combined force point bolt is provided with two combined force point oblique bushings, and the inner ends of the two combined force point oblique bushings are fitted in the middle of the combined force point bolt, and the outer ends are fitted into the outside of the clip after passing through the mounting hole. The first end of each clip is provided with a circular hole, and the second end is provided with a long hole. The first ends of the two clips are connected by a secondary lever bolt and a secondary bushing passing through the circular hole, and the second ends of the two clips are connected by another secondary lever bolt and another secondary bushing passing through the long hole.

[0008] Preferably, the outer diameter of the force-combining point inclined bushing is a variable outer diameter, which gradually decreases from the outer end to the inner end.

[0009] Preferably, the clip is a jujube-shaped metal structure, which is wide in the middle and narrow at both ends along the length direction, and has flanges perpendicular to the clip plate surface on both sides along the width direction for reinforcing the strength and rigidity of the clip.

[0010] Preferably, the positions of the main mounting holes, the round holes and the elongated holes of the clip have inwardly protruding protrusions for shortening the distance between the positions and another clip.

[0011] Preferably, at the locations of the mounting circular holes and the elongated holes of the clips, trapezoidal grooves having a larger size than that of the circular holes or the elongated holes are provided on the outer sides of the two clips facing each other.

[0012] Preferably, the clip is provided with avoidance holes between the main mounting hole and the circular hole, and between the main mounting hole and the elongated hole.

[0013] This application realizes the self-adaptation of the top lever to the deformation of the secondary lever and the test piece through the design of long holes and round holes at both ends of the lever body, ensuring that the loading system does not restrict the deformation of the test piece and increasing the loading accuracy of the lever system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a restraint device of a preferred embodiment of the clip-type loading lever of the present application.

[0015] Among them, 1-circular hole, 2-secondary bushing, 3-avoidance hole, 4-lever body, 41-flange, 42-raised structure, 5-force point inclined bushing, 6-avoidance hole, 7-long hole, 8-secondary bushing, 9-secondary lever bolt, 10-trapezoidal groove, 11-avoidance hole, 12-force point bolt, 13-avoidance hole, 14-secondary lever bolt, 15-trapezoidal groove. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the implementation of this application will be described in more detail below in conjunction with the drawings in the implementation of this application. In the drawings, the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and should not be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in conjunction with the drawings.

[0017] The present application provides a clip-type loading lever, such as Figure 1 As shown, it mainly includes a lever body 4, a resultant force bolt 12, a resultant force oblique bushing 5, a secondary lever bolt 9 and a secondary bushing 2;

[0018] Among them, the lever body 4 includes two relatively arranged sheet-type plate-like structure clips, each of which has a main mounting hole in the middle of the clip, and the two clips are connected by a combined force point bolt 12 arranged in the main mounting hole. The combined force point bolt 12 is provided with two combined force point inclined bushings 5. The inner ends of the two combined force point inclined bushings 5 ​​are fitted together in the middle of the combined force point bolt 12, and the outer ends are fitted together on the outside of the clip after passing through the mounting hole. The first end of each clip is provided with a circular hole 1, and the second end is provided with a long hole 7. The first ends of the two clips are connected by a secondary lever bolt 9 and a secondary bushing 2 passing through the circular hole 1, and the second ends of the two clips are connected by another secondary lever bolt 14 and another secondary bushing 8 passing through the long hole 7.

[0019] The loading lever of this application is the top lever, used to connect the actuator and the secondary lever. In this embodiment, the circular hole 1 is usually opened at one end of the short lever arm, and the elongated hole 7 is opened at one end of the long lever arm. That is, in comparison, the circular hole 1 is closer to the main mounting hole. The resultant force point bolt installed in the main mounting hole is mainly used to connect and transfer load to the top lever and the actuator. The circular hole 1 and the elongated hole 7 are mainly used for connection with the secondary lever. It should be noted that the secondary lever structure is similar to the top lever structure of this application. The middle of the secondary lever is a single-ear structure that is adapted to be installed on the secondary lever bolts 9 at both ends of the top lever.

[0020] This application realizes the self-adaptation of the top lever to the deformation of the secondary lever and the test piece through the design of long holes and round holes at both ends of the lever body, ensuring that the loading system does not restrict the deformation of the test piece and increasing the loading accuracy of the lever system.

[0021] In some optional embodiments, the outer diameter of the combined force point oblique bushing 5 is a variable outer diameter, gradually decreasing from the outer end to the inner end. In this embodiment, the combined force point oblique bushing 5 is a multi-section hollow cylinder as a whole, used in pairs, the opposite ends of the two combined force point oblique bushings 5 ​​are the head, and the part passing through the main mounting hole is the tail. The head has a small outer diameter and the tail has a large outer diameter. The bosses at both ends of the tail are clamped on the outside of the clip, used for the outer limit of the clip-type lever. This smaller outer diameter design on the inside of the bushing is used to limit the single ear of the actuator at the combined force point, so that the single ear of the actuator at the combined force point and the clip-type lever of this application can both transmit load and not contact, thereby avoiding friction and load deviation.

[0022] Furthermore, the secondary lever bolt 9 and secondary bushing 2 connect the top lever end to the secondary lever and transmit load. The secondary bushing is a multi-section hollow cylinder. Its two end bosses engage the outer side of the clip, while its interior rests against the outer side of the secondary lever bearing, limiting the position of the secondary lever. Together, the secondary lever bolt and secondary bushing transmit load.

[0023] The above embodiment realizes the connection of the secondary and top levers at the same height with an installation angle of 0° to 5° through a clip-type lever design, thereby improving the overall stability of the lever system.

[0024] In some optional embodiments, the clip is a jujube-shaped metal structure, which is wide in the middle and narrow at both ends along the length direction, and has flanges 41 perpendicular to the clip plate surface on both sides along the width direction to enhance the strength and rigidity of the clip, and is reshaped for spatial coordination with the secondary lever.

[0025] In some optional embodiments, the positions of the main mounting hole, the circular hole 1 and the elongated hole 7 of the clip have an inwardly protruding protrusion structure 42 for shortening the distance between the position and the other clip. The boss design at both ends can shorten the bending distance of the connecting bolt and reduce the load on the connecting bolt.

[0026] In some optional embodiments, trapezoidal grooves 10 and 15, larger than the circular or elongated holes, are located on the opposite sides of the clips at the locations of the mounting circular holes 1 and elongated holes 7. In this embodiment, the trapezoidal grooves are used to reduce weight and the overall length of the secondary lever bolt.

[0027] In some optional embodiments, the clip is provided with avoidance holes 3, 6, 11, and 13 between the main mounting hole and the circular hole 1, and between the main mounting hole and the elongated hole 7. As previously mentioned, the secondary lever is similar in structure to the top lever, but slightly shorter in length. After the single ear at the center of the secondary lever is connected to the end of the top lever of the present application, one end of the secondary lever will extend to a position approximately 1 / 4 of the distance from the end of the top lever of the present application. Since the secondary lever needs to rotate to a certain extent relative to the top lever of the present application, avoidance holes are required to be provided in the clip. Since the rotation angle of the secondary lever is small, the size of the avoidance holes can be slightly larger than the size of the circular hole or elongated hole at the end, so that the position of the mounting bolt at the end of the secondary lever has a certain degree of freedom of movement.

[0028] The clip-type lever of the present application has a simple structure, is easy to process, and has a small size, which saves space occupied by test equipment and is more convenient for inspection during ground verification tests of structural strength.

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

Claims

1. A clip-type loading lever, characterized in that: It comprises a lever body (4), a combined force point bolt (12), a combined force point inclined bushing (5), a secondary lever bolt (9) and a secondary bushing (2); The lever body (4) comprises two relatively arranged sheet-type plate-like structure clips, each of which has a main mounting hole in the middle, and the two clips are connected by a combined force point bolt (12) arranged in the main mounting hole, and the combined force point bolt (12) is provided with two combined force point inclined bushings (5), the inner ends of the two combined force point inclined bushings (5) are fitted in the middle of the combined force point bolt (12), and the outer ends are fitted on the outside of the clip after passing through the mounting hole, and the first end of each clip is provided with a circular hole (1), and the second end is provided with a long hole (7), the first ends of the two clips are connected by a secondary lever bolt (9) and a secondary bushing (2) passing through the circular hole (1), and the second ends of the two clips are connected by another secondary lever bolt (14) and another secondary bushing (8) passing through the long hole (7).

2. The clip-type loading lever according to claim 1, wherein: The outer diameter of the force-combining point inclined bushing (5) is a variable outer diameter, which gradually decreases from the outer end to the inner end.

3. The clip-type loading lever according to claim 1, wherein: The clip is a jujube-shaped metal structure, which is wide in the middle and narrow at both ends along the length direction, and is provided with flanges (41) perpendicular to the clip plate surface on both sides along the width direction for reinforcing the strength and rigidity of the clip.

4. The clip-type loading lever according to claim 1, wherein: The positions of the main mounting hole, the circular hole (1) and the elongated hole (7) of the clip have an inwardly protruding protrusion structure (42) for shortening the distance between the position and another clip.

5. The clip-type loading lever according to claim 4, wherein: At the locations of the mounting circular holes (1) and the elongated holes (7) of the clips, trapezoidal grooves (10, 15) having a larger size than the circular holes or the elongated holes are provided on the outer sides of the two clips facing each other.

6. The clip-type loading lever according to claim 1, wherein: The clip is provided with avoidance holes (3, 6, 11, 13) between the main mounting hole and the circular hole (1), and between the main mounting hole and the elongated hole (7).

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