CN105328627A

CN105328627A - Tool for replacing bolts at external field

Info

Publication number: CN105328627A
Application number: CN201510867794.6A
Authority: CN
Inventors: 刘恢先; 游丹; 柏林; 候宪勇
Original assignee: China National South Aviation Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2015-12-02
Filing date: 2015-12-02
Publication date: 2016-02-17
Anticipated expiration: 2035-12-02
Also published as: CN105328627B

Abstract

The invention discloses a tool for replacing bolts at the external field. The tool is used for disassembling and replacing installation bolts (10) of aero-engines at the external field and at least comprises an arch-shaped supporting plate (1) supported on the installation bolts (10), an extrusion bolt (2) installed at a middle protruding part (11) of the arch-shaped supporting plate (1), and a guide pin (3) arranged between the extrusion bolt (2) and the installation bolts (10). According to the tool for replacing the bolts at the external field, the problem that because the replacement space for the installation bolts of the aero-engines at the external field is small, disassembling tools cannot be fully stretched is solved. The tool is easy to use, greatly lowers the labor intensity and improves the labor efficiency.

Description

Tool for replacing bolts in outfield

Technical Field

The invention relates to a tool for maintaining an aircraft engine, in particular to a tool capable of disassembling and replacing an installation bolt of the aircraft engine under a field condition, and particularly relates to a tool for replacing the bolt in the field.

Background

Aircraft engines used in aircraft typically require regular maintenance, and sometimes disassembly for repair after failure or damage. Fig. 1 shows a schematic view of an engine assembly in which a plurality of mounting bolts 10 are arranged in a circle around the periphery of an aircraft engine, fig. 2 shows a schematic view of the right side of the mounting structure shown in fig. 1, and as is apparent from fig. 1 and 2, the number of bolts 10 used for engine mounting is large, and a large number of support and connection structures are arranged around the periphery of the engine, and the space is very narrow. When the bolts 10 are disassembled and assembled in the prior art, the hands of operators are difficult to reach the bolt, tools such as a wrench are more difficult, and sometimes even a plurality of peripheral structures need to be disassembled and removed completely to reach the position of the bolt 10, so that the disassembling and assembling operation can be carried out only by using special tools in a special repair warehouse, and the time, labor and efficiency are low.

However, for many cases, the aircraft needs to be maintained at the outfield, i.e. the aircraft engine needs to be quickly disassembled and replaced in the outfield environment with crude conditions, and the use of stations and tools is seriously affected due to the narrow space around the engine, so that the replacement is time-consuming and labor-consuming, and the disassembly trace is easily left on the hole wall of the bolt hole of the connecting bolt, which reduces the reliability of the connecting structure. Meanwhile, after the engine works for a period of time, the connection part where the bolt 10 is located is dislocated due to the deformation of parts, so that the bolt 10 is forcibly screwed out by a wrench with great strength, and the bolt hole after the bolt 10 is screwed out is often deformed and cannot be used for installing a new bolt. Therefore, before installing a new bolt, a reamer is required to ream the bolt hole, and the new bolt can be installed after the hole wall of the bolt is corrected and the decomposition mark is removed. Therefore, the work of replacing bolts in an outfield usually takes a long time, the labor intensity is high, and the task of replacing the connecting bolts with potential safety hazards at a user position in a specified time is difficult to ensure.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a tool for replacing bolts in an outfield, so as to reduce or avoid the problems.

In order to solve the technical problem, the invention provides a tool for replacing bolts in a field, which is used for disassembling and replacing mounting bolts of an aeroengine under the field condition.

Preferably, the convex support plate comprises the middle boss and a first pressing support part and a second pressing support part which are positioned at two ends of the middle boss, and pressing gaps are arranged on the first pressing support part and the second pressing support part.

Preferably, the tool further comprises a bracket and a compression bolt, wherein the bracket is used for clamping and fixing the first compression support part and/or the second compression support part on the mounting edge of the mounting bolt.

Preferably, the bracket has a threaded hole for engaging with the press bolt.

Preferably, the clip is clamped outside the pressure gap of the first and/or second pressure support.

Preferably, the tool further comprises a resiliently deformable wire for pulling the clamp bow into the clamping position.

Preferably, the end of the steel wire is provided with a clamping part for clamping the traction hole on the bow-shaped clamp.

Preferably, the guide pin comprises a plurality of guide pins of different diameters.

Preferably, the tool further comprises a plurality of correction pins with different diameters.

Preferably, the leveling pin is identical to the guide pin.

The tool for replacing the bolts in the outfield can be used for quickly and reliably replacing the bolts with potential safety hazards in the outfield environment, solves the problems that the replacement space of the bolts for installing the outfield aeroengine is small, and the disassembling tool is difficult to put in place, is simple and easy to use, greatly reduces the labor intensity and improves the labor efficiency. The tool disclosed by the invention is used for reducing the time for replacing one bolt in situ in an outfield from 5-6 hours to 1 hour.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein,

FIG. 1 is a schematic view of an engine assembly;

FIG. 2 is a right side schematic view of the mounting structure shown in FIG. 1;

FIG. 3 is a partially enlarged view of a tooling for field bolt replacement according to an embodiment of the present invention applied to the assembly structure shown in FIG. 1;

fig. 4 is an exploded perspective view illustrating a tool for outfield replacement of bolts according to an embodiment of the present invention.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

As described in the background section, in order to replace the engine connecting bolt quickly and efficiently, the invention provides a tool for replacing a bolt in a outfield, which is used for disassembling and replacing a mounting bolt 10 of an aeroengine under the condition of the outfield. Fig. 3 is a partially enlarged view illustrating a tool for a field bolt changer according to an embodiment of the present invention applied to the assembly structure shown in fig. 1, wherein the tool of the present invention is installed in the area indicated by the circle a shown in fig. 1, the space is very narrow due to the many supporting and connecting structures arranged on the periphery of the engine, and the whole tool is relatively troublesome even if the tool is enlarged in fig. 3, so that fig. 4 shows the whole tool separately from the installation position of fig. 3 for the sake of clarity, that is, fig. 4 is an exploded perspective view illustrating the tool for the field bolt changer according to an embodiment of the present invention.

As shown in fig. 3 to 4, the tooling for field bolt replacement of the present invention includes at least a male bracket 1 supported above a mounting bolt 10, an extrusion bolt 2 mounted at a middle boss 11 of the male bracket 1, and a guide pin 3 disposed between the extrusion bolt 2 and the mounting bolt 10.

When the tool is used, firstly, the nut of the mounting bolt 10 to be disassembled is removed (the nut is usually not damaged and is easily screwed off), then the convex support plate 1 is fixed at the corresponding position above the mounting bolt 10, the extrusion bolt 2 is aligned with the mounting bolt 10, then the extrusion bolt 2 is screwed downwards, and the mounting bolt 10 is gradually and slowly extruded out of the bolt hole through the downward force of the extrusion bolt 2. When the extrusion bolt 2 approaches the edge of the bolt hole, the extrusion bolt 2 cannot go down further because the diameter of the extrusion bolt 2 is larger than the diameter of the mounting bolt 10 (the extrusion bolt 2 is too thin and is easy to bend, and the diameter is larger and better). At this time, the pressing bolt 2 may be upwardly screwed to allow the pressing bolt 2 and the mounting bolt 10 to be spaced apart from each other, so that the guide pin 3 having a smaller diameter than the bolt hole may be placed on the top of the mounting bolt 10 from which half of the mounting bolt 10 is removed, and the pressing bolt 2 may be downwardly screwed to completely press out the mounting bolt 10 by the length of the guide pin 3 extending into the bolt hole, thereby completing the removal process.

In one embodiment, as shown in FIG. 4, the male bracket 1 includes a central boss 11 and a first compression support 12 and a second compression support 13 at opposite ends of the central boss 11, the first compression support 12 and the second compression support 13 having compression notches 14 formed therein. The pressing notches 14 can be used for being clamped by other mounting bolts at two sides of the mounting bolt 10 to be disassembled, that is, when in use, the nut of the mounting bolt 10 to be disassembled is firstly removed, then the nuts of the two mounting bolts at two sides of the mounting screw 10 are further unscrewed, the two pressing notches 14 of the first pressing and supporting part 12 and the second pressing and supporting part 13 are respectively clamped below the two unscrewed nuts, and then the two nuts are screwed to fix the arch support plate 1 at a corresponding position above the mounting bolt 10.

Of course, in another embodiment, the tool may further include a bracket 4 and a pressing bolt 5 for clamping and fixing the first pressing support portion 12 and/or the second pressing support portion 13 on the mounting edge of the mounting bolt 10, and the bracket 4 has a threaded hole 41 for matching with the pressing bolt 5. That is, as shown in fig. 3, since the first pressing support portion 12 has no mounting bolt available, one arcuate clamp 4 is provided outside the pressing notch 14 of the first pressing support portion 12, and the second pressing support portion 13 is fixed by one mounting bolt.

It is further preferred that the bracket 4 is clamped outside the contact indentation 14 of the first contact support 12 and/or the second contact support 13, as shown in fig. 4, i.e. when the first contact support 12 cannot be assisted by other mounting bolts, the bracket 4 is used to clamp outside the contact indentation 14 to avoid the contact indentation 14, and other mounting bolts which are difficult to detach may protrude from the contact indentation 14, and avoiding the contact indentation 14 can avoid interference.

The adoption of the arch clamp 4 can improve the flexibility of the tool, and for the situations that the mounting bolt is easy to disassemble or the space is narrow and difficult to operate, the arch clamp 4 can be used as a fixed connecting piece, the pressing notch 14 is not needed, or only one of the pressing notches 14 is needed, so that the tool is convenient to use, and the working efficiency can be greatly improved.

In yet another embodiment, the tool may further comprise an elastically deformable wire 6 for pulling the bow clamp 4 into a clamped and secured position. The end of the wire 6 is provided with a stop 61 which catches the pull-in opening 42 in the bracket 4. That is, as described above, since the space is narrow, even the clip 4 is sometimes difficult to be mounted in place, the clip 4 can be pulled to a proper mounting position by passing the elastic wire 6 through the pulling hole 42 of the clip 4, being caught by the catching portion 61, and then pulling the other end of the wire 6 to pass through the narrow space.

In yet another embodiment, the guide pin 3 may comprise a plurality of guide pins of different diameters. That is, when the mounting bolt 10 is removed, if the bolt hole is deformed more than enough, the guide pin 3 for pressing the mounting bolt 10 may be stuck and taken out after pressing the mounting bolt 10 downward, and the stuck guide pin 3 may be pressed out by using a guide pin having a smaller diameter as a medium in the same step of pressing the mounting bolt, and sometimes, the process may be repeated several times, that is, the guide pin having a smaller diameter is pressed and stuck again.

Further, the tool may further include a plurality of leveling pins (not shown) having different diameters. That is, when the mounting bolt 10 is completely removed, a decomposition trace is left on the hole wall of the bolt hole, and it is necessary to align the bolt hole up and down to facilitate mounting of a new mounting bolt. The measure adopted by the invention is to gradually enlarge the holes by using the correcting pins with different diameters, namely, the correcting pin with small diameter is firstly placed in the bolt hole to be corrected, the correcting pin is downwards extruded by adopting the same steps of disassembling and installing the bolt 10, and the correcting pins with certain diameters are gradually changed until the correction is finished. Of course, the last leveling pin tends to get stuck, and therefore it is also necessary to push the last leveling pin out with a smaller diameter leveling pin in turn. Further preferably, the leveling pin is identical to the guide pin. The pin can be used as a guide pin and a correcting pin, is convenient to manufacture, easy to exchange and strong in universality, and saves cost.

In conclusion, the tool for replacing the bolts in the outfield can be used for quickly and reliably replacing the bolts with potential safety hazards in the outfield environment, solves the problems that the replacement space of the bolts for installing the outfield aeroengine is small and the disassembling tool is difficult to put in place, is simple and easy to use, greatly reduces the labor intensity and improves the labor efficiency. The tool disclosed by the invention is used for reducing the time for replacing one bolt in situ in an outfield from 5-6 hours to 1 hour.

It should be appreciated by those of skill in the art that while the present invention has been described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including technical equivalents which are related to the embodiments and which are combined with each other to illustrate the scope of the present invention.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the invention.

Claims

1. The utility model provides a frock for outfield replacement bolt for dismantle the replacement under the outfield condition to aeroengine's construction bolt 10 and carry out the change, its characterized in that, the frock is at least including supporting bow-shaped extension board (1) above construction bolt 10, install extrusion bolt (2) of bulge (11) in the middle of convex extension board (1) and set up and be in extrusion bolt (2) with guide pin (3) between construction bolt 10.

2. The tooling of claim 1, wherein the male support plate (1) comprises the middle boss (11) and a first pressing support part (12) and a second pressing support part (13) which are positioned at two ends of the middle boss (11), and pressing notches (14) are arranged on the first pressing support part (12) and the second pressing support part (13).

3. The tool according to claim 2, characterized in that the tool further comprises a bracket (4) and a pressure bolt (5) for clamping and fixing the first pressure support (12) and/or the second pressure support (13) to the mounting edge of the mounting bolt 10.

4. Tooling according to claim 3, characterized in that the bow (4) has a threaded hole (41) cooperating with the pressure bolt (5).

5. The tool according to claim 4, characterized in that the bracket (4) is clamped outside the contact indentation (14) of the first contact support (12) and/or the second contact support (13).

6. Tool according to one of claims 3 to 5, characterized in that it further comprises an elastically deformable wire (6) which draws the bow (4) into a clamping and fixing position.

7. Tool according to claim 6, characterized in that the end of the wire (6) is provided with a stop (61) for catching the pull hole (42) in the bracket (4).

8. The tooling according to one of the claims 1 to 7, characterized in that the guide pin (3) comprises a plurality of guide pins of different diameters.

9. The tool of claim 8, further comprising a plurality of alignment pins having different diameters.

10. The tooling of claim 9, wherein the leveling pin is identical to the guide pin.