CN215659971U

CN215659971U - Tightening tool for large-torque nut

Info

Publication number: CN215659971U
Application number: CN202122150458.3U
Authority: CN
Inventors: 刘金志; 王文成; 林大凯; 谢小帅
Original assignee: Wuxi Hyatech Technology Co ltd
Current assignee: Wuxi Hyatech Technology Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-01-28
Anticipated expiration: 2031-09-07

Abstract

The utility model provides a tightening tool for a large-torque nut, which can be used for installing a torque multiplier, so that the nut is convenient to tighten. The device comprises a fixing base plate, a connecting column, a mounting seat and a torque transfer shaft, wherein the fixing base plate is used for fixing a part with a nut to be screwed at the top; the fixed chassis is connected with the mount pad through the spliced pole, and the mount pad is located the top of treating to screw up the nut and is used for installing the moment multiplier, has seted up on the mount pad and has dodged the through-hole, and moment switching shaft one end is connected with treating to screw up the nut, and the other end extends to the mount pad top and is used for being connected with the moment multiplier through dodging the through-hole.

Description

Tightening tool for large-torque nut

Technical Field

The utility model relates to the technical field of nut screwing devices, in particular to a screwing tool for a large-torque nut.

Background

In the civil aircraft engine industry at present, a lot of key positions adopt the big moment of torsion nut of external spline formula to lock spare part or connect big unit body, like the gland nut behind the high vortex rotor secondary disk of many models, the connection between high-pressure turbine rotor and the high-pressure compressor rotor in addition, all adopt big moment of torsion nut, big moment of torsion nut is only depending on the spanner to realize hardly screwing up when screwing up, adopt the moment multiplier to assist the nut of screwing up usually, and if adopt the moment multiplier just need adopt suitable frock to operate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tightening tool for a large-torque nut, which can be used for mounting a torque multiplier so as to facilitate the tightening of the nut, and aims to solve the problem that the nut needs to be tightened by adopting a proper tool.

The technical scheme is as follows: the utility model provides a screw up frock of big moment of torsion nut, its includes fixed chassis, fixed chassis is used for fixed top to have the part of waiting to screw up the nut, its characterized in that: the device also comprises a connecting column, a mounting seat and a torque transfer shaft; the fixed chassis is connected with through the spliced pole the mount pad, the mount pad is located the top of treating to screw up the nut and is used for installing the moment multiplier, seted up on the mount pad and dodged the through-hole, moment switching shaft one end with treat to screw up the nut and be connected, the other end passes through dodge the through-hole and extend to the mount pad top and be used for with the moment multiplier is connected.

It is further characterized in that:

one end of the torque adapter shaft is provided with a connecting hole, the inner diameter of the connecting hole corresponds to the outer diameter of the nut to be screwed, and an internal spline is arranged inside the connecting hole and connected with an external spline of the nut to be screwed through the internal spline; the other end of the torque transfer shaft is provided with an external spline for being connected with a torque multiplier through the spline, and the outer diameter of the other end of the torque transfer shaft corresponds to the inner diameter of the connecting end of the torque multiplier; the middle of the torque adapter shaft is also provided with a reducer section;

the connecting column is connected with the mounting seat through a top ring; the top ring is annular and comprises counter bores and assembly holes which are uniformly arranged around the circle center of the top ring, the counter bores are used for installing and connecting bolts of the top ring and the connecting column, and the assembly holes are used for installing and connecting bolts of the top ring and the mounting seat;

the top of the mounting seat is provided with a step surface corresponding to the shape of the mounting surface of the torque multiplier.

The utility model has the beneficial effects that: when the torque multiplier is used, a part with a nut to be screwed down at the top is fixed on the fixed chassis, the torque transfer shaft is installed on the nut, the installation seat is installed on the fixed chassis through the connecting column, the torque transfer shaft extends out of the avoiding hole in the installation seat, the torque multiplier is installed on the installation seat and connected with the torque transfer shaft, and therefore the nut is screwed down through the torque multiplier by using the wrench, and the torque multiplier is convenient to use.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a view of the torque adapter shaft;

FIG. 3 is a view of the mounting base structure;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is a top ring structure view;

fig. 6 is a sectional view taken at B-B in fig. 5.

Detailed Description

The tightening tool for the large-torque nut shown in fig. 1 comprises a fixed base plate 1, wherein the bottom of the fixed base plate 1 is fixed through a ground pile bolt 7, the top of the fixed base plate 1 is fixed through a fixed base 3, a part 9 (a high-pressure turbine secondary disc) with a nut to be tightened is arranged at the top of the fixed base plate 1, and the tightening tool further comprises a connecting column 4, a mounting seat 2 and a torque transfer shaft 6; the fixed chassis 1 is connected with a mounting seat 2 through a connecting column 4, the mounting seat 2 is located above a nut 8 to be screwed and used for mounting a torque multiplier, as shown in a combined view in fig. 3, an avoiding through hole 21 is formed in the mounting seat 2, one end of a torque transfer shaft 6 is connected with the nut 8 to be screwed, and the other end of the torque transfer shaft extends to the upper side of the mounting seat 2 through the avoiding through hole 21 and is used for being connected with the torque multiplier.

Specifically, referring to fig. 2, one end of the torque transfer shaft 6 is provided with a connecting hole 61, the inner diameter of the connecting hole 61 corresponds to the outer diameter of the nut 8 to be screwed, and an internal spline 62 is arranged inside the connecting hole 61 and connected with the external spline of the nut 8 to be screwed through the internal spline 62; the other end of the torque transfer shaft 6 is provided with an external spline 63 for connecting with a torque multiplier through a spline, and the external diameter of the other end of the torque transfer shaft 6 corresponds to the internal diameter of the connecting end of the torque multiplier; the moment adapter shaft 6 is also provided with a reducing section 64 in the middle, so that even if the sizes of the moment multiplier and the nut are inconsistent, the moment multiplier and the nut can still be normally used by selecting the proper moment adapter shaft 6.

The connecting column 4 is connected with the mounting seat 2 through a top ring 5; with reference to fig. 5 and 6, the top ring 5 is annular and includes countersunk holes 51 and assembly holes 52 uniformly arranged around the center of the top ring, the countersunk holes 51 are used for installing bolts for connecting the top ring 5 and the connection column 4, and the assembly holes 52 are used for installing bolts for connecting the top ring 5 and the mounting base 2. Through setting up the apical ring 5, be connected with mount pad 2 through apical ring 5, after screwing up the nut like this, only need dismantle mount pad 2, apical ring 5 down, spliced pole 4 still can remain the frock that is used for installing next processing step.

Referring to fig. 4, the top of the mounting base 2 is provided with a stepped surface 22 corresponding to the shape of the mounting surface of the torque multiplier, so that the stepped surface can be dislocated with the high and low points of the contact surface of the torque multiplier, and the torque multiplier is perpendicular to the torque adapter shaft after being mounted.

When in use, the fixed chassis 1 is fixed through the ground pile bolt 7, the fixed base 3 and the connecting column 4 are installed on the fixed base 3, the high-pressure turbine secondary disc is fixed on the fixed base 3, the nut is screwed on the rear shaft of the high-pressure turbine secondary disc, the internal spline of the connecting hole 61 of the torque transfer shaft 6 is matched with the external spline of the nut, the mounting seat 2 is installed through the top ring 5, the torque transfer shaft 6 extends out of the avoiding hole 21 on the mounting seat 2, the torque multiplier (Hazettate torque multiplier, model: 8112) is installed on the mounting seat 2 and connected with the external spline of the torque transfer shaft 6, the fixing pin of the torque multiplier is inserted into the positioning hole 23 on the mounting seat 2, the torque multiple needing to be increased is calculated, the torque wrench is adjusted, the torque wrench is screwed until the torque value reaches the required torque value, nuts and torque multipliers with different sizes can be connected through the torque transfer shaft 6, the whole process is convenient to use.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a screw up frock of big moment of torsion nut, its includes fixed chassis, fixed chassis is used for fixed top to have the part of waiting to screw up the nut, its characterized in that: the device also comprises a connecting column, a mounting seat and a torque transfer shaft; the fixed chassis is connected with through the spliced pole the mount pad, the mount pad is located the top of treating to screw up the nut and is used for installing the moment multiplier, seted up on the mount pad and dodged the through-hole, moment switching shaft one end with treat to screw up the nut and be connected, the other end passes through dodge the through-hole and extend to the mount pad top and be used for with the moment multiplier is connected.

2. The tightening tool for the large-torque nut as claimed in claim 1, wherein: one end of the torque adapter shaft is provided with a connecting hole, the inner diameter of the connecting hole corresponds to the outer diameter of the nut to be screwed, and an internal spline is arranged inside the connecting hole and connected with an external spline of the nut to be screwed through the internal spline; the other end of the torque transfer shaft is provided with an external spline for being connected with a torque multiplier through the spline, and the outer diameter of the other end of the torque transfer shaft corresponds to the inner diameter of the connecting end of the torque multiplier; the moment adapter shaft is also provided with a reducer section in the middle.

3. The tightening tool for the large-torque nut as claimed in claim 1 or 2, wherein: the connecting column is connected with the mounting seat through a top ring; the apical ring is cyclic annular, and it includes counter sink, the pilot hole that evenly sets up around its centre of a circle, the counter sink is used for the erection joint the apical ring with the bolt of spliced pole, the pilot hole is used for the erection joint the apical ring with the bolt of mount pad.

4. The tightening tool for the large-torque nut as claimed in claim 1 or 2, wherein: the top of the mounting seat is provided with a step surface corresponding to the shape of the mounting surface of the torque multiplier.