Combined nut wrench for assembling in aero-engine accessory drive casing

Abstract

The invention discloses a combined nut wrench for assembling in an aero-engine accessory drive casing. The combined nut wrench comprises a tong head, an adaptor and a torque wrench, wherein the tong head extends into the aero-engine accessory drive casing and is matched and connected with a nut in the aero-engine accessory drive casing; the adaptor is fixedly connected to the tong head and is used for changing the direction of applying a torque to the tong head; the torque wrench is connected with the adaptor, and is used for applying the torque; a first end of the adaptor is fixedly connected with a rotating shaft of the tong head; a connecting part used for being connected with the torque wrench is arranged at a second end of the adaptor; the torque wrench and the adaptor are assembled at the connecting part after being connected angularly; and the axis of the torque wrench and the rotating shaft of the tong head are positioned on different planes. The torque wrench is used for applying the torque to the adaptor; the conversion of the direction of transferring the torque by the torque wrench is realized through the adaptor, the torque after conversion is transmitted to the tong head through the rotating shaft, and through the matched connection of the tong head and the nut, the assembly or disassembly of the nut is realized. The combined nut wrench can be suitable for assembling nuts in various narrow spaces.

Description

technical field [0001] The invention relates to the field of aviation assembly devices, in particular to a combined nut wrench used for internal assembly of an aeroengine accessory drive casing. Background technique [0002] A large number of nuts and bolts are assembled and connected in the aero-engine accessory transmission casing, so the assembly of nuts is an assembly process that is often faced during the assembly process of the aero-engine accessory transmission casing. [0003] Take the assembly of a round nut with grooves inside the transmission case of a certain type of engine accessory as an example. The tooling inside the case has a narrow operable space, and the head of the torque wrench interferes with the inner wall of the case. The actual assembly torque of the round nut cannot be controlled, which is a typical assembly. blind spot. The existing assembly method of the slotted round nut inside the casing is as follows: set the nut wrench set on the slotted rou...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a combined nut wrench used for internal assembly of the aero-engine accessory drive case to solve the problem of the torque wrench easily interfering with the inner wall of the case due to the narrow operable space during the assembly process of the nut inside the aero-engine accessory drive case. It cannot be used; when using an iron rod and a nut wrench for combined assembly, the nut assembly torque is uncontrollable, it takes more than six minutes to assemble a single nut, and the assembly efficiency is very low.

Images