CN205780092U - A kind of anti-out-of-plane bending connector - Google Patents

Abstract

This utility model relates to a kind of anti-out-of-plane bending connector, for making upper and lower auricle in auricle attachment structure be subjected only to loads in plane, it is characterized in that, including auricle, connector, connecting bolt and locking nut, being provided with the step of depression in the middle part of described connecting bolt, and described ledge surface is smooth, connector is placed in described step, described connecting bolt passes two symmetrical auricles and connector and locks with locking nut, and connector and upper and lower auricle have gap.One of the present utility model anti-out-of-plane bending connector is placed in connecting bolt by connector, and make to be provided with between connector and auricle gap, auricle out-of-plane bending load is made to be converted into Tensile or Compressive Loading in face, and then load can only transmit with the form of tension and compression in face, reduce structural stress level, alleviate construction weight.

Description

An anti-out-of-plane bending connector

technical field

The utility model belongs to the field of aircraft strength design, in particular to an anti-out-of-plane bending connector.

Background technique

At present, the aircraft widely adopts the lug connection form to transfer the concentrated load. The lug structure connection form is simple, and generally bears the in-plane load. For example, a certain type of aircraft structure adopts lug bolt connection to transfer concentrated moment, see Figure 1. The connecting piece 1' is connected with the structural piece 4', and the force couple M of the connecting piece 1' is transmitted through the contact form of the bolt 3' and the lug 2'. There are two ways to balance the torque transmitted from the connecting piece 1' to the lug 2': Method 1 The force couple balance is formed by the reaction force F1-F1 of the bolt 3' on the ear hole. The second method is the force couple balance formed by the connecting piece 1' and the upper and lower ear piece extrusion force F2-F2. The schematic diagram of the moment balance is shown in Figure 2, the ear piece The force F1 is an in-plane tension and compression load, and the force F2 is an out-of-plane load for the lug structure. Under the action of F2, the bending stress at the root of the lug is very high. However, for some models due to space constraints and special development requirements, the lugs need to bear in-plane tensile loads and out-of-plane loads. The bending moment caused by out-of-plane loads significantly increases the local stress of the lugs. If it is damaged, the lug 2' and the structural part 4' are forced to be designed to be heavier, and the connecting part 1' is also larger, and a larger weight price is paid.

Utility model content

The purpose of this utility model is to provide an anti-out-of-plane bending connector to solve the above problems.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an anti-out-of-plane bending connecting piece, which is used to make the upper and lower lugs in the lug connection structure only bear the in-plane load, which includes lugs, connecting pieces, connecting bolts and a lock nut, the middle part of the connecting bolt is provided with a concave step, and the surface of the step is smooth, the connecting piece is placed in the step, and the connecting bolt passes through the two symmetrical lugs and the connecting piece and is locked The nut is locked tightly, and there is a gap between the connecting piece and the upper and lower lugs.

Further, the connecting piece includes a body and a splicing piece, both of which have semicircular grooves, and after splicing the body and the splicing pieces, the two semicircular grooves form a circular hole, the diameter of the circular hole is the same as the diameter of the middle step of the connecting bolt. The diameters are the same, and the round hole matches the step, and the body and the splicing piece are fixedly connected by bolts.

Further, there is a transition section at the step of the connecting bolt.

Further, the transition section is chamfered.

Further, the chamfer is a rounded corner.

An anti-out-of-plane bending connector of the utility model is placed in the connecting bolt through the connector, and a gap is provided between the connector and the ear piece, so that the out-of-plane bending load of the ear piece is converted into an in-plane tension and compression load, and then the load It can only be transmitted in the form of in-plane tension and compression, which reduces the structural stress level and reduces the structural weight.

Description of drawings

The accompanying drawings, which are incorporated in the specification and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and are used together with the specification to explain the principle of the utility model.

Fig. 1 is a schematic diagram of the connection structure of the tabs in the prior art;

Fig. 2 is a schematic diagram of the stress of the ear piece in the prior art;

Fig. 3 is a schematic diagram of the connecting structure of the ear piece and the connector of the present invention;

Fig. 4 is a structural schematic diagram of the connector of the present invention.

Among them, 1-connecting bolt, 2-lock nut, 3-lug, 4-connecting piece, 11-step, 12-transition section, 41-body, 42-splice, 43-semi-circular groove, 44-round hole , 1'-connector, 2'-ear, 3'-bolt, 4'-structure.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model more clear, the technical solution in the utility model embodiment will be described in more detail below in conjunction with the accompanying drawings in the utility model embodiment. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some embodiments of the present utility model, but not all embodiments. The embodiments described below with reference to the figures are exemplary and are intended to explain the present invention, but should not be construed as limitations of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Embodiments of the utility model are described in detail below in conjunction with the accompanying drawings.

In describing the present invention, it should be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present utility model.

As shown in Figure 3, the out-of-plane bending connector of the present invention includes lugs 3, connectors 4, connecting bolts 1 and lock nuts 2, and the number of lugs 3 is two, which are symmetrically arranged on the structural parts of the aircraft. The lug 3 and the connecting piece 4 are connected through the connecting bolt 1, and then locked with the lock nut 2, that is, the connection between the two structural parts of the aircraft is realized. The connecting bolt 1 in the utility model is a bolt with a recessed step 11 in the middle part, and the surface of the recessed part is smooth to reduce stress, and there is a transition section 12 at the end of the step, and the transition section 12 part exists in the form of rounded corners. This can reduce the stress concentration on the connecting bolt 1 and improve the bearing capacity. In addition, the connecting piece 4 includes a body 41 and a splicing piece 42. Both the body 41 and the splicing piece 42 have semicircular grooves 43. After aligning the semicircular grooves of the body 41 and the splicing piece 42, they are spliced together so that the two semicircular grooves 43 form a Circular hole 44, the step 11 of the connecting bolt passes through the circular hole 44, so the diameter of the circular hole 44 is the same as the diameter of the step 11, and then the body 41 and the splice 42 are connected with bolts, as shown in Figure 4 . In the utility model, there is a large enough gap between the connector 4 and the lug 3, and the out-of-plane bending load of the lug is converted into an in-plane tension and compression load, and then the load can only be transmitted in the form of in-plane tension and compression, reducing structural stress level, reducing structural weight.

An anti-out-of-plane bending connector of the present utility model has the following advantages and positive effects:

1) The stepped bolt connection form is adopted to ensure that the lug is loaded in the form of in-plane tension and compression;

2) The stepped bolt connection form effectively reduces the local stress level of the structure, reduces the structural weight, and reduces the production cost;

3) The connection form is designed, the assembly form is simple, the process is convenient to implement, and it has good interchangeability.

The above is only the best specific implementation of the utility model, but the scope of protection of the utility model is not limited thereto, any skilled person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (5)

1. an anti-out-of-plane bending connector, is used for making upper and lower auricle in auricle attachment structure be subjected only in face Load, it is characterised in that include auricle (3), connector (4), connecting bolt (1) and locking nut (2), described connecting bolt (1) middle part is provided with the step (11) of depression, and described step (11) table Face is smooth, and connector (4) is placed in described step (11), and described connecting bolt (1) is through symmetry Two auricles (3) and connector (4) and with locking nut (2) lock, connector (4) is with upper Lower auricle has gap.

Anti-out-of-plane bending connector the most according to claim 1, it is characterised in that described connector (4) include that body (41) and splice (42), body (41) and splice (42) all have semicircle Groove (43), and body (41) and splice (42) splice latter two half slot formed circular hole (44), The diameter of described circular hole (44) is identical with the diameter at connecting bolt middle bench (11) place, and circle Hole (44) coordinates with step (11), and body (41) is bolted to connection with splice (42).

Anti-out-of-plane bending connector the most according to claim 1, it is characterised in that described connection spiral shell Bolt step (11) place also has changeover portion (12).

Anti-out-of-plane bending connector the most according to claim 3, it is characterised in that described changeover portion (12) it is chamfering.

Anti-out-of-plane bending connector the most according to claim 4, it is characterised in that described chamfering is Rounding.