CN212421146U

CN212421146U - Interference shaft sleeve disassembling tool

Info

Publication number: CN212421146U
Application number: CN202021136562.6U
Authority: CN
Inventors: 姚星; 胡一廷; 杨波
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-01-29
Anticipated expiration: 2030-06-18

Abstract

The utility model provides an interference shaft sleeve decomposing tool, which comprises a jaw assembly, a sleeve and a pressing piece, wherein the sleeve is sleeved outside the jaw assembly, and the pressing piece is arranged at the upper end of the jaw assembly and is pressed on the sleeve; the clamping jaw assembly comprises a base and two clamping jaws, and the clamping jaws are rotatably connected to the lower end of the base through a rotating shaft; by screwing down the pressing member so that the sleeve moves downward, the claws contract inward to grip the member to be disassembled, and the claws move upward to apply an upward disassembling force to the member to be disassembled by the screwing force of the pressing member. The utility model discloses a jack catch structural style that harmomegathus realizes the quick location to the bush decomposition application of force position, through the application of screw rod mechanism realization decomposition power, easy operation. The decomposing tool is simple in structure, convenient to assemble and disassemble and high in decomposing efficiency.

Description

Interference shaft sleeve disassembling tool

Technical Field

The utility model relates to an engine assembling field, in particular to interference axle sleeve decomposes instrument.

Background

Fig. 1 is a first structural schematic diagram of a low-pressure turbine disc assembly in the prior art. Fig. 2 is a schematic structural diagram of a low-pressure turbine disc assembly in the prior art.

As shown in fig. 1 and 2, in the prior art, in order to improve the performance of the low-pressure turbine, increase the number of turbine stages and reduce the weight increase as much as possible, a part of the turbine disk 10 is designed in a compact structure, and the connecting bolts between the turbine disks 10 are in a structural form of D-bolts 20 and bushings 30. And the bushing 30 and the connecting hole at the mounting edge of the turbine disk 10 are in interference fit A. Wherein, clearance fit B is arranged between the polish rod part of the D-shaped bolt 20 and the inner hole of the lining 30, and the D-shaped bolt 20 can freely move between the annular step and the mounting edge of the turbine disc 10 in a serial mode.

Fig. 3 is a schematic view of the height difference between the bushing and the turbine disk in the prior art low-pressure turbine disk assembly.

As shown in fig. 3, due to the interference fit, and the height difference H between the annular step 31 of the bushing and the turbine disk 10 is only 0.5mm, the operating space is small, when the assembly of the turbine disk is inspected and disassembled, it is difficult to disassemble the D-shaped bolt and the bushing by using a conventional tool, and the bolt, the bushing and the turbine disk are easily damaged.

In view of the above, there is a need for a new interference sleeve disassembling tool to overcome the above technical problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to decompose low pressure turbine dish subassembly more difficult in order to overcome among the prior art conventional instrument, and cause defects such as damage to bolt, bush and turbine dish easily, provide an interference axle sleeve and decompose instrument.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

the interference shaft sleeve decomposition tool is characterized by comprising a jaw assembly, a sleeve and a pressing piece, wherein the sleeve is sleeved outside the jaw assembly, and the pressing piece is mounted at the upper end of the jaw assembly and pressed on the sleeve; the clamping jaw assembly comprises a base and two clamping jaws, and the clamping jaws are rotatably connected to the lower end of the base through a rotating shaft;

by screwing down the pressing member so that the sleeve moves downward, the claws contract inward to grip the member to be disassembled, and the claws move upward to apply an upward disassembling force to the member to be disassembled by the screwing force of the pressing member.

According to the utility model discloses an embodiment, the jack catch subassembly still includes the screw rod, the screw rod passes through the mounting to be fixed in the base, the pivot is worn to establish one side of base, the jack catch is worn to establish in the pivot, makes the jack catch can wind the pivot is rotated and is expanded or closed.

According to the utility model discloses an embodiment, a hole has been seted up to one side of base, the pivot is worn to establish downthehole.

According to the utility model discloses an embodiment, the jack catch with the base is through the pivot is riveted integratively.

According to an embodiment of the present invention, the rotating shaft is a connecting pin.

According to an embodiment of the invention, when the jaws rotate closed, a gap is left between the two jaws.

According to the utility model discloses an embodiment, the jack catch bottom is provided with the claw hook, the claw hook is followed the inner wall of jack catch bottom is to interior extension.

According to the utility model discloses an embodiment, a mounting hole has been seted up to the upper end of base, the screw rod passes through the nut to be installed in the mounting hole.

According to an embodiment of the present invention, the screw is in the mounting hole free rotation.

According to an embodiment of the present invention, the pressing member is a pressing nut.

The utility model discloses an actively advance the effect and lie in:

the utility model discloses interference axle sleeve decomposes instrument and adopts harmomegathus jack catch structural style, realizes the quick location to the bush decomposition application of force position, realizes exerting, easy operation of decomposition power through screw rod mechanism. The decomposing tool is simple in structure, convenient to assemble and disassemble and high in decomposing efficiency.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout, and in which:

fig. 1 is a first structural schematic diagram of a low-pressure turbine disc assembly in the prior art.

Fig. 2 is a schematic structural diagram of a low-pressure turbine disc assembly in the prior art.

Fig. 4 is a first installation schematic diagram of the shaft sleeve disassembling tool of the present invention.

Fig. 5 is a second schematic view of the installation of the shaft sleeve disassembling tool of the present invention.

Fig. 6 is an exploded view of the jaw assembly of the shaft sleeve disassembling tool of the present invention.

Fig. 7 is a schematic view of the state of the jaw assembly of the shaft sleeve disassembling tool when the jaw is opened.

Fig. 8 is a schematic view of the shaft sleeve disassembling tool according to the present invention, when the jaws of the jaw assembly are closed.

[ reference numerals ]

Turbine disk 10

D-bolt 20

Bushing 30

Interference fit A

Clearance fit B

Bushing annular step 31

Jaw assembly 100

Sleeve 200

Pressing member 300

Base 110

Claw 120

Rotating shaft 121

Screw 130

Gap a

Claw hook 122

Mounting hole 111

Nut 140

Bolt avoiding hole C

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.

Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.

Fig. 4 is a first installation schematic diagram of the shaft sleeve disassembling tool of the present invention. Fig. 5 is a second schematic view of the installation of the shaft sleeve disassembling tool of the present invention. Fig. 6 is an exploded view of the jaw assembly of the shaft sleeve disassembling tool of the present invention. Fig. 7 is a schematic view of the state of the jaw assembly of the shaft sleeve disassembling tool when the jaw is opened. Fig. 8 is a schematic view of the shaft sleeve disassembling tool according to the present invention, when the jaws of the jaw assembly are closed.

As shown in fig. 4 to 8, the utility model discloses an interference shaft sleeve disassembling tool, it includes jaw assembly 100, sleeve 200 and compresses tightly a 300, establishes sleeve 200 cover in jaw assembly 100's outside, compresses tightly a 300 and installs the upper end at jaw assembly 100 to compress tightly on sleeve 200. The jaw assembly 100 includes a base 110 and two jaws 120, and the jaws 120 are rotatably connected to a lower end of the base 110 by a rotating shaft 121. In use, by tightening the pressing member 300 downward such that the sleeve 200 moves downward, the jaws 120 contract inward to grip the member to be disassembled, and the jaws 120 move upward to apply an upward disassembling force to the member to be disassembled, driven by the tightening force of the pressing member 300.

Here, the pressing member 300 is preferably a pressing nut. The component to be disassembled is a bushing 30.

Preferably, the jaw assembly 100 further includes a screw 130, the screw 130 is fixed in the base 110 by a fixing member, the rotating shaft 121 is disposed through one side of the base 110, and the jaw 120 is disposed through the rotating shaft 121, so that the jaw 120 can be rotated around the rotating shaft 121 to be unfolded or closed.

More specifically, for example, a hole may be formed on one side of the base 110, and the rotating shaft 121 may be inserted into the hole. The rotation shaft 121 may preferably be a connection pin here. The jaws 120 and the base 110 are riveted together by a rotating shaft 121, and the two halves of the jaws 120 can freely rotate around a connecting pin and can be unfolded or closed.

In addition, when the jaws 120 are rotated to close, a gap a is left between the two jaws 120, namely, the two halves of the jaws 120 are not completely attached in a closing mode, and a gap (namely, the gap a) is left, so that the operation is easier.

Preferably, a claw hook 122 is provided at the bottom of the claw 120, and the claw hook 122 extends inward along the inner wall surface of the bottom of the claw 120 for grasping the bush 30.

In addition, a mounting hole 111 is opened at the upper end of the base 110, and the screw 130 is mounted in the mounting hole 111 through a nut 140 and integrated with the base 110. The screw 130 is freely rotatable in the mounting hole 111 for transmitting the upward resolving force.

The sleeve 200 is preferably a hollow cylindrical sleeve, which is fitted over the jaws 120 and the base 110, so that the jaws 120 are in a closed condition, thus hooking the bushing annular table 31, and at the same time acting as a reaction force resolving transmission. A compression nut 300 is mounted on the screw 130, compressing the sleeve 200, for applying the resolving force.

According to the structure description, the utility model discloses when axle sleeve decomposes instrument and uses, at first accomplish the installation of jack catch subassembly, its installation is:

first, the two jaws 120 are aligned with the connecting ear holes and combined together.

Then, the base 110 is placed on the upper end of the jaw in alignment with the coupling hole.

Then, the claw 120 and the base 110 are coupled by a coupling pin (i.e., a rotating shaft 121), and the coupling pin is riveted after the coupling, so that the claw 120, the base 110, and the coupling pin are integrated.

Next, the screw 130 is mounted into the top mounting hole 111 of the base 110.

Finally, the nut 140 is installed without compressing the screw 130, and the screw 130 can rotate freely in the installation hole of the base.

As shown in fig. 4 and 5, the interference bush disassembling tool is installed on the turbine disk 10 and the bush 30, so that after the bush 30 is disassembled, the D-bolt 20 is removed, and the specific process is as follows:

first, the jaw assembly 100 is installed on the turbine disk 10, and after the jaws 120 are unfolded from the jaw notches, they are laterally placed under the liner ring table 31, and at this time, the half jaws 122 are positioned under the liner ring table 31.

Then, the other half of the jaws 120 are manually moved so that the jaws 120 rotate closed about the connecting shaft 121, enclosing the bushing 30.

Next, the sleeve 200 is installed on the jaw assembly 100, and a pressing member 300 (e.g., a pressing nut) is installed on the screw 130 and presses the sleeve 200.

Next, tightening of the tightening member 300 (e.g., the tightening nut) is continued, so that the sleeve 200 moves downward, so that the two jaws 120 are always in a closed state, hooking the annular table of the bushing 30. At this time, the jaw 120 is higher than the D-bolt 20 to form a bolt escape hole C.

Subsequently, after the lower end surface of the sleeve 200 contacts the turbine disk 10, the pressing member 300 (e.g., a pressing nut) is further tightened, and the bush 30 is slowly pulled out.

Next, the compression member 300 (e.g., compression nut) is released and the sleeve 200 is pulled upward so that the sleeve 200 is raised above the uppermost ends of the jaws 120.

Then, any of the jaws 120 is pulled out from the gap (i.e., gap a) so that the jaws 120 are spread apart around the connecting pin.

Finally, after the bushing 30 is pulled out, the D-bolt 20 is inclined and disassembled from the turbine disk 10.

Particularly, the utility model discloses interference axle sleeve decomposes instrument has following characteristics:

the clamping jaws are of an outer-wrapping opening-closing type, during installation, the clamping jaws are unfolded along the connecting pins and placed below the annular platform of the lining from the side, the clamping jaws are higher than the bolts to form bolt avoiding holes, the bolt avoiding holes can be sleeved on the D-shaped bolts to avoid the bolts, the lining can be hooked when the bolt avoiding holes are closed, and an acting point for decomposing the lining is provided.

And secondly, the circular sleeve is sleeved outside the clamping jaw, so that the clamping jaw is always in a closed state and hooks the annular platform of the bushing.

And thirdly, the nut is arranged on the screw rod at the upper end of the clamping jaw and is tightly pressed on the circular sleeve, the nut is screwed up to drive the circular sleeve to move downwards to contact with the turbine disc, meanwhile, the clamping jaw is driven inwards to contract, the nut is continuously screwed up, and then the clamping jaw is driven to move upwards, so that upward decomposition force is applied to the bushing.

And a gap is reserved when the two clamping jaws are closed, a non-complete attaching structure is adopted, and the clamping jaws can be unfolded or closed from the gap during operation.

The utility model discloses interference axle sleeve decomposes instrument and adopts outsourcing open-close type jack catch structural style, and the jack catch stretches into the H space of bush annular platform and turbine dish, hooks the bush, utilizes screw rod mechanism to apply ascending decomposition force to the bush to decompose the bush, then decompose the D type bolt slope back from the turbine dish and get off. Interference axle sleeve decomposition instrument simple structure installs and removes the convenience, decomposes efficiently.

In addition, the clamping jaws for decomposition have opening and closing performance, the clamping jaws can be unfolded in a rotating mode around the connecting pins, when the clamping jaws are opened, bolts can be avoided and placed below the annular table of the bushing from the side face, and when the clamping jaws are closed, the bushing can be wrapped from the periphery to hook the bushing. The interference shaft sleeve decomposing tool applies upward decomposing force to the clamping jaws, so that the decomposing tool is convenient to assemble and disassemble and high in decomposing efficiency.

To sum up, the utility model discloses interference axle sleeve decomposes instrument and adopts harmomegathus jack catch structural style, realizes the quick location to bush decomposition application of force position, realizes exerting of decomposition power, easy operation through screw rod mechanism. The decomposing tool is simple in structure, convenient to assemble and disassemble and high in decomposing efficiency.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.

Claims

1. The interference shaft sleeve disassembling tool is characterized by comprising a jaw assembly, a sleeve and a pressing piece, wherein the sleeve is sleeved outside the jaw assembly, and the pressing piece is mounted at the upper end of the jaw assembly and pressed on the sleeve; the clamping jaw assembly comprises a base and two clamping jaws, and the clamping jaws are rotatably connected to the lower end of the base through a rotating shaft;

2. The interference bushing disassembling tool of claim 1, wherein the jaw assembly further comprises a screw fixed in the base by a fixing member, the rotating shaft is disposed through one side of the base, and the jaw is disposed on the rotating shaft so that the jaw can be opened or closed by rotating around the rotating shaft.

3. The interference bushing resolution tool of claim 2, wherein a hole is formed in one side of said base, and said shaft is inserted into said hole.

4. The interference bushing resolution tool of claim 3, wherein said jaws and said base are riveted together by said spindle.

5. The interference sleeve resolution tool of claim 3, wherein said spindle is a connector pin.

6. The interference bushing resolution tool of claim 2, wherein said jaws are rotationally closed with a gap therebetween.

7. The interference sleeve resolution tool of claim 6, wherein said jaw base is provided with a claw hook extending inwardly along an inner wall surface of said jaw base.

8. The bushing decomposition tool according to claim 2, wherein said base has a mounting hole formed at an upper end thereof, and said screw is mounted in said mounting hole by means of a nut.

9. The bushing resolution tool according to claim 8, wherein said threaded rod is free to rotate within said mounting hole.

10. The bushing decomposition tool according to claim 1, wherein said compression member is a compression nut.