KR101605798B1 - Device and method getting a bushing into a hole - Google Patents

Abstract

The present invention relates to a device (1000) for inserting a bushing into a hole and, more specifically, to a device (1000) for inserting a bushing into a hole, which inserts a bushing (20) into a hole (11) of a structure (10) using pulling force in a desired direction using an actuator (200) and enables the rapid and simple insertion of the bushing (20).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bushing press-

The present invention relates to a bushing press-fitting apparatus and method, and more particularly, to a bushing press-fitting apparatus and method capable of press-fitting a bushing into a hole of a structure with a pulling force in a desired direction by using an actuator.

The most commonly used method for press-fitting flange-type bushings is to pressurize the bushing by cold shrinking the liquid nitrogen in a short time using an aba-press.

As an example, referring to Fig. 1, the upper surface of the bushing 110 is pressurized using the upper and lower pressing surfaces 10, as in Korean Patent Publication No. 2002-0090560 (" A pusher 11 for pressing the bushing 110 while being vertically moved and a flange 12 capable of adjusting the stroke and being combined with the upper end of the pusher 11 to press the pusher 11 which can accommodate the pusher 11 and the auxiliary pedestal 13 and which is set in a concentric circle on the installation site of the bushing 110 and which guides the up and down movement of the pusher 11, And a guide (14).

Such prior literature is difficult to precisely align the tool at the center of the bushing, and even if it is adjusted to some extent at the beginning of the work, the tool tends to squeeze or slip on the press during pressurization, There is a problem that the rubber body is damaged or the bushing mounting portion of the structure, that is, the hole around the bushing mounting portion is damaged, the bushing function is deteriorated as well as reusable, and even the entire structure must be replaced due to hole damage There is a problem.

Also, in this type of press-in method, a large-sized structure can not be mounted due to the limited width of the press, and the worker must place the cold-shrunk bushing at the hole center of the structure in the center of the hole in a short period of time .

Korean Patent Publication No. 2002-0090560 (published on December 22, 2002)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a bushing device capable of pressing a bushing into a hole of a structure with a pulling force in a desired direction by using an actuator, And to provide a bushing press apparatus and method that can press the bushing easily.

A bushing press apparatus according to an embodiment of the present invention includes: a structure having a hole extending in the longitudinal direction; And a bushing formed of a flange portion and a pipe portion and having an outer circumferential surface of the pipe portion inserted into the hole of the structure and a bottom surface of the flange portion abutting one end surface of the structure, A bushing press-in device for press-fitting the bushing, the bushing press-in device comprising: a mandrel passing through the hole; An actuator connected to the other end of the mandrel; A first adapter covering the outer circumferential surface of the mandrel and movable in the longitudinal direction, the first adapter contacting the other end surface of the structure; A second adapter covering the outer circumferential surface of the mandrel and being movable in the longitudinal direction, the second adapter being provided in contact with the inner circumferential surface of the bushing and the one end surface of the flange portion; And a third adapter which is in contact with one end face of the second adapter so as to be pressed on one end face of the structure and is coupled to one end of the mandrel.

Further, the actuator is a hydraulic puller device.

The outer diameter of the other end of the first adapter is larger than the diameter of the hole of the first adapter, and the outer diameter of one end of the first adapter is equal to the diameter of the hole of the first adapter. And is inserted into the hole.

The other end of the second adapter is formed as a pipe portion so that the outer diameter of the other end of the second adapter is equal to the diameter of the hole of the second adapter. And is inserted into the hole.

The second adapter may have a single or a plurality of grooves on an outer circumferential surface at one end.

In addition, the third adapter is plate-shaped and has a through-hole extending from the center to the outside, so that the third adapter can be attached to and detached from the mandrel.

The bushing press-fitting method using the bushing press-fitting device may further include connecting the actuator to the other end of the mandrel; Passing the mandrel through the hole after inserting the first adapter into the mandrel and bringing the first adapter into close contact with the other end surface of the structure; Cold shrinking the bushing; A step of inserting the other surface of the second adapter into one surface of the bushing, and then the combined body of the bushing and the second adapter is brought into contact with one end of the structure; Coupling a third adapter to one end of the mandrel; The actuator pulling the mandrel toward the other end; And pressing the bushing into the hole of the structure.

Also, the bushing press-in method includes disassembling and removing the mandrel, the first adapter, the second adapter, and the third adapter after the bushing is press-fitted into the hole of the structure.

According to the bushing press-fitting apparatus and method of the present invention, the bushing can be press-fitted into a hole of a structure with a pulling force in a desired direction by using an actuator, and the bushing can be press- .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram illustrating the use of a cartridge heater according to an embodiment of the present invention; FIG.
2 is a perspective view of a bushing press apparatus according to an embodiment of the present invention;
3 is an exploded perspective view of a bushing press apparatus according to an embodiment of the present invention.
4 is a sectional view of a bushing press apparatus according to an embodiment of the present invention;
5 is a flowchart (1) of a bushing indenting method according to an embodiment of the present invention;
6 is a flowchart (2) of a bushing indentation method according to an embodiment of the present invention;
7 is a bushing indentation disassembly method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a bushing press apparatus 1000 and a method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The following drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms. In addition, like reference numerals designate like elements throughout the specification.

In this case, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the following description and the accompanying drawings, A description of known functions and configurations that may unnecessarily obscure the description of the present invention will be omitted.

FIG. 2 is a perspective view of a bushing press apparatus 1000 according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a bushing press apparatus 1000 according to an embodiment of the present invention, Sectional view of a bushing press apparatus 1000 according to an embodiment.

2, 3 and 4, the bushing press apparatus 1000 includes a structure 10 having a hole 11 extending in the longitudinal direction thereof; The flange portion 21 is formed by the flange portion 21 and the pipe portion 22 and the outer circumferential surface of the pipe portion 22 is inserted into the hole 11 of the structure 10, A bushing press-fitting device 1000 for press-fitting the bushing 20 into the hole 11 with respect to a structure 10-bushing 20 assembly including a bushing 20, A mandrel 100 penetrating the inside of the hole 11; An actuator 200 connected to the other end of the mandrel 100; A first adapter 300 which covers the outer circumferential surface of the mandrel 100 and is movable in the longitudinal direction, and contacts the other end surface of the structure 10; A second adapter 400 which is movable in a longitudinal direction around the mandrel 100 and is provided to abut the inner circumferential surface of the bushing 20 and one end surface of the flange portion 21; A third adapter 500 coupled to one end of the second adapter 400 so as to press the second adapter 400 on one end surface of the structure 10 and coupled to one end of the mandrel 100; As shown in FIG.

The structure 10 may be, for example, a main landing gear of an aircraft. Conventionally, a press has been used to press-fit the bushing 20 into the general structure 10. However, since the aircraft structure 10 is so large that the width that the press can accommodate is limited, have.

Therefore, the bushing press apparatus 1000 may be used to press the bushing 20 into the hole 11 of the structure 10. [

Accordingly, the actuator 200 used to press-fit the bushing 20 may be provided as a hydraulic puller device.

In this case, the entire shape of the actuator 200 is omitted in FIG. 1, and only a connecting portion of the actuator 200 may be partially shown.

In addition, the actuator 200 is a hydraulic puller and is ideal for pulling various components such as bearings, wheels, gears, and pulleys. In addition, since the pump handle is rotated 360 degrees, the puller device can be used in the easiest position.

Therefore, the bushing press-in apparatus 1000 is effective for press-fitting the bushing 20 by a pulling force.

One end of the actuator 200 may have a connecting portion formed with the female threaded portion 210 and may be screwed to the other end of the mandrel 100 having the male threaded portion 110 formed thereon.

The mandrel 100 may be formed in a shape that is parallel to the hole 11 of the structure 10 and is longer than the inner length of the hole 11 and has an outer diameter smaller than the diameter of the hole 11. [

The other end of the first adapter 300 may be a flange 310, and the other end of the first adapter 300 may be a pipe 320.

The outer diameter of the other end of the first adapter 300 is larger than the diameter of the hole 11 and the outer diameter of the first end of the first adapter 300 matches the diameter of the hole 11 and can be inserted into the hole 11.

At this time, the first adapter 300 may help the mandrel 100 to be positioned at the center of the hole 11.

The actuator 200 is connected to the other end of the mandrel 100 and the mandrel 100 is inserted into the hole 11 after the first adapter 300 is inserted into the mandrel 100. In other words, Through. Accordingly, the mandrel 100 can be positioned at the center of the hole 11 by the first adapter 300.

Also, the second adapter 400 may have one end formed of the flange portion 410 and the other end formed of the pipe portion 420.

The outer diameter of one end of the second adapter 400 is larger than the diameter of the hole 11 and the outer diameter of the other end of the second adapter 400 is the same as the diameter of the hole 11 and can be inserted into the hole 11.

At this time, the second adapter 400 may serve to fix the position of the bushing 20.

The inner diameter of the pipe portion 22 of the bushing 20 may be equal to the outer diameter of the pipe portion 420 of the second adapter 400 when the bushing 20 is in a cold contracted state.

When the bushing 20 is inflated after a certain period of time after the bushing 20 is press-fitted, when the gap between the bushing 20 and the second adapter 400 is generated, Can be easily disassembled.

In addition, the second adapter 400 may have a single or a plurality of grooves 430 on the outer circumferential surface at one end thereof.

This is because when the actuator 200 pulls the mandrel 100, the other surface of the flange portion 410 of the second adapter 400 is pressed against one surface of the structure 10, can do. A groove 430 having a predetermined length may be formed on the outer circumferential surface of the second adapter 400 so that the diameter of the flange 420 of the second adapter 400 can be increased or decreased according to external pressure .

Meanwhile, the third adapter 500 is plate-shaped, and a through-hole 510 extending from the center to the outside can be formed, and the third adapter 500 can be detachably attached to the mandrel 100.

This is because the groove 120 can be formed on the circumferential surface of the mandrel 100 by the thickness of the third adapter 500 at a position where the third adapter 500 is in contact with the one surface of the second adapter 400 . Accordingly, the third adapter 500 may be detachably attached to the groove 120 formed in the mandrel 100 in a side opened form.

FIG. 5 is a flowchart (1) of a bushing indenting method according to an embodiment of the present invention, and FIG. 6 is a flowchart (2) of a bushing indenting method according to an embodiment of the present invention.

Referring to FIGS. 5 and 6, the bushing indenting method using the bushing press fitting apparatus 1000 of the present invention is composed of the following sequential steps.

(A) connecting the actuator (200) to the other end of the mandrel (100).

After the first adapter 300 is inserted into the mandrel 100, the mandrel 100 is passed through the hole 11 so that the first adapter 300 closely contacts the other end surface of the structure 10 (B, c).

And cold shrinking the bushing (20).

The step (d) of inserting the other surface of the second adapter 400 on one surface of the bushing 20 and then contacting the combined body of the bushing 20 and the second adapter 400 to one end of the structure 10.

(E) coupling a third adapter (500) to one end of the mandrel (100).

And the actuator 200 pulls the mandrel 100 toward the other end.

The step (f) of pushing the bushing (20) into the hole (11) of the structure (10).

At this time, the actuator 200 can be coupled by coupling the other end of the mandrel 100 having the male threaded portion 110 and the connecting portion formed with the female threaded portion 210 at one end thereof.

Thereafter, the first adapter 300 is inserted into the mandrel 100 in the other end direction, and one end face of the flange portion 310 of the first adapter 300 is brought into contact with the other end face of the structure 10 The mandrel 100 can be passed through the hole 11 so that the mandrel 100 can be inserted into the hole 11.

The bushing 20 is inserted into the bushing 20 so that the peripheral surface of the pipe 420 of the second adapter 400 is closely contacted with the inner diameter of the bushing 20, The adapter 400 may be disposed to be in contact with one end of the structure 10.

The third adapter 500 may then be inserted into the groove 120 of the mandrel 100 to be closely attached to one end surface of the second adapter 400.

Here, the actuator 200, the first adapter 300, the bushing 20, the second adapter 400, and the third adapter 500 are coupled to the mandrel 100. When the process is completed, the actuator 200 is operated to pull the mandrel 100 toward the other end so that the bushing 20 can be press-fitted into the hole 11.

At this time, the actuator 200 may be provided as a hydraulic puller device. On the other hand, various devices can be used as long as they are capable of applying a hydraulic force, a pneumatic pressure or other force to pull.

7 is a bushing 20 indentation disassembly method according to an embodiment of the present invention.

7, after the bushing 20 is press-fitted into the hole 11 of the structure 10, the mandrel 100, the first adapter 300, the second adapter 400, 3 disassembling and removing the adapter 500.

More specifically, the actuator 200 may be firstly disassembled (①), and then the third adapter 500 may be taken out and disassembled (②). In addition, one side of the mandrel 100 can be pulled in one direction so as to come out of the hole 11 (3).

At this time, the first adapter 300 and the second adapter 400 can be automatically disengaged from the mandrel 100 while the mandrel 100 is disassembled (step 4).

Referring again to the bushing press apparatus 1000 according to an embodiment of the present invention, the first adapter 300, the bushing 20, the second adapter 400, The actuator 200 is connected to the other end of the mandrel 100 by coupling the adapter 500 so that the bushing 20 is pulled in the desired direction from the hole 11 of the structure 10 So that the bushing 20 can be press-fitted into the large-size structure 10 as well.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Therefore, it is to be understood that the subject matter of the present invention is not limited to the described embodiments, and all of the equivalents or equivalents of the claims are included in the scope of the present invention will be.

10: Structure 20: Bushing
100: Mandrel 200: Actuator
300: first adapter 400: second adapter
500: Third adapter
11: hole 21 of the structure: flange portion of the bushing
22: pipe portion of bushing 110: number of mandrel thread portion
120: groove of mandrel 210: female thread portion of structure
310: flange portion of first adapter 320: pipe portion of first adapter
410: flange portion of the second adapter 420: pipe portion of the second adapter
430: groove of the second adapter 510: penetration groove of the third adapter
1000: Bushing press fitting

Claims (8)

A structure (10) having a hole (11) extending in the longitudinal direction; The flange portion 21 is formed by the flange portion 21 and the pipe portion 22 and the outer circumferential surface of the pipe portion 22 is inserted into the hole 11 of the structure 10, A bushing press-fitting device 1000 for press-fitting the bushing 20 into the hole 11 with respect to a structure 10-bushing 20 assembly including a bushing 20, As a result,
A mandrel 100 penetrating the inside of the hole 11;
An actuator 200 connected to the other end of the mandrel 100;
And is movable in the longitudinal direction around the mandrel 100, and is in contact with the other end surface of the structure 10,
And the other end is formed by the flange portion 310 and the other end is larger in diameter than the hole 11 and the other end is formed by the pipe portion 320 so that the outer diameter of the one end matches the diameter of the hole 11, A first adapter 300 inserted into the body 11;
A second adapter 400 which is movable in a longitudinal direction around the mandrel 100 and is provided to abut the inner circumferential surface of the bushing 20 and one end surface of the flange portion 21;
The other surface of the second adapter 400 is inserted into one surface of the bushing 20 and then the bushing 20 is inserted into the bushing 20 before the combined body of the bushing 20 and the second adapter 400 contacts the one end of the structure 10. [ Means for cold-shrinking; And
A third adapter 500 which is in contact with one end face of the second adapter 400 and is coupled to one end of the mandrel 100 so that the second adapter 400 is pressed onto one end face of the structure 10; Including,
The actuator 200 is a hydraulic puller that applies a force in a direction to pull the mandrel 100,
The first adapter 300, the bushing 20, the second adapter 400 and the third adapter 500 are coupled to the mandrel 100 and the actuator (not shown) is coupled to the other end of the mandrel 100 Wherein the bushing can be press-fitted into the hole of the structure by applying a pulling force toward the other end by connecting the bushing to the hole of the structure.
2. The apparatus of claim 1, wherein the actuator (200)
Characterized in that it is a hydraulic puller device.
delete The apparatus of claim 1, wherein the second adapter (400)
And the other end of the second adapter 400 is formed of a pipe portion 420 so that the outer diameter of the other end of the second adapter 400 is smaller than the diameter of the hole 11 ) Diameter of the bushing (10), and is inserted into the hole (11).
5. The apparatus of claim 4, wherein the second adapter (400)
And a plurality of grooves (430) are formed on the outer circumferential surface of one end of the bushing press apparatus (1000).
The apparatus of claim 1, wherein the third adapter (500)
Wherein a plate-shaped through groove (510) extending from the center to the outside is formed and is detachable to the mandrel (100).
A bushing indenting method using the bushing press-in apparatus (1000) according to any one of items 1, 2, 4, 5, and 6,
Connecting the actuator (200) to the other end of the mandrel (100);
After the first adapter 300 is inserted into the mandrel 100, the mandrel 100 is passed through the hole 11 so that the first adapter 300 closely contacts the other end surface of the structure 10 ;
Cold shrinking the bushing (20);
A step of inserting the other surface of the second adapter 400 on one surface of the bushing 20 and then connecting the combined body of the bushing 20 and the second adapter 400 to one end of the structure 10;
Coupling a third adapter 500 to one end of the mandrel 100;
Pulling the actuator (200) toward the other end of the mandrel (100);
And bending the bushing (20) into the hole (11) of the structure (10).
8. The method of claim 7,
The first adapter 300, the second adapter 400, and the third adapter 500 after the bushing 20 is press-fitted into the hole 11 of the structure 10, And disassembling and removing the bushing using the bushing press-fitting apparatus.

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