WO2018199343A1

WO2018199343A1 - Tool for bushing replacement work

Info

Publication number: WO2018199343A1
Application number: PCT/KR2017/004335
Authority: WO
Inventors: 강성삼
Original assignee: 주식회사 에스엠모터스
Priority date: 2017-04-24
Filing date: 2017-04-24
Publication date: 2018-11-01

Abstract

The present invention relates to a tool for bushing replacement work, which has a simple structure and accommodates a bushing released from a vehicle member so as to enable simple assembly and installation and remarkably reduce the time and labor force required for bushing replacement work, and the tool includes: an upper adapter having a lower groove formed on the bottom surface thereof such that the upper end of a bushing is fitted with the lower surface and a central through hole formed in the center between the upper surface and the lower groove; a lower adapter formed in a long tubular shape with an open upper part such that a vehicle member for fixing the bushing is held on the upper end and the bushing separated from the vehicle member is released downwards and accommodated, and having a closing part formed on the bottom surface so as to close the bottom part thereof and a lower through hole formed, by corresponding to the central through hole, in the center of the closing part; and a bolt which is fitted through the lower through hole, the inner sleeve of the bushing, and the central through hole in a state, in which the head part is held on the bottom surface of the closing part, and to which a nut is screw-coupled to a part exposed to the upper part of the upper adapter.

Description

Bushing replacement tool

The present invention relates to a tool for a bushing replacement operation, and more particularly, a bushing replacement that accommodates a bushing missing in a vehicle member, thereby simplifying assembly and installation while significantly reducing the time and manpower required for the bushing replacement operation. It relates to a working tool.

In general, a lot of bushing is required to connect parts and parts in the suspension system of the automobile. In automobiles, the bushing connects the parts organically like the knee is bent to reduce wear during perturbation between parts, and absorbs the vibration transmitted from the road surface to the vehicle body when driving the engine or prevents noise and vibration. It is essential for a good ride.

There are many types of bushings used in automobiles, but a so-called rubber bushing using rubber as a shock absorbing filler is commonly used. Referring to FIG. 9, the bushing 1 is a structure in which two

metal sleeves

2 and 3 are coaxially disposed and an elastic rubber filler 4 is filled between the inner sleeve 2 and the outer sleeve 3. The inner sleeve 2 is here generally longer than the outer sleeve 3. The outer sleeve 3 fits snugly into the installation hole of the vehicle member 5, such as an automobile part, for example, an arm or a plate, and is fixed integrally. The inner sleeve 2 of the bushing 1 can be fitted with a bolt to connect with another member. As long as the vehicle member 5 and the other member are connected via the bushing 1, they can each move around the fastening bolt element. The rubber filler 4 absorbs impacts that elastically correspond to the movement of the two members and act in any direction perpendicular to or parallel to the axis.

If the

metallic sleeves

2 and 3 of the bushing 1 described above are corroded or the rubber filler 4 loses its elasticity, it will not function properly, but rather will cause metallic noises with severe vibrations. The checks need to be made and replaced with new ones at the right time.

To replace the bushing (1), remove the bushing to be replaced and replace it with a new one.The primitive method, such as tapping with a hammer to remove or insert it, is difficult, time consuming, and can damage the product. A tool or jig was needed.

In accordance with such a necessity, the present applicant has developed and applied for a patent for a tool used for bushing replacement, and has been registered as Patent Registration No. 10-1454350, "Tool for Bushing Replacement Work." 12 to 12, the configuration and operation relationship will be described.

With reference to FIG. 10, FIG. 11 shows the operation | work state which removes the bushing 1 from the vehicle member 5 in which the bushing 1 was installed. A bushing base adapter 30 suitable for the size of the bushing 1 to be worked is placed on the base 21 of the tool main body 20, and a vehicle member 5 provided with a bushing 1 to be pulled out is placed thereon. Then, the ram 13 of the hydraulic actuator 10 is attached with a bushing pressurizing adapter 40 corresponding to the size of the bushing 1. When the preparation is completed, when hydraulic oil is supplied to the hydraulic actuator 10 and operated, the ram 13 is lowered, and the lower end of the bushing pressurizing adapter 40 attached thereto is located above the outside of the bushing 1. The bushing 1 is pushed out of the vehicle member 5 by the force of the ram 13, which is in contact with the sleeve and is continuously pressed from this, and is collected in the hollow portion 32 of the lower bushing support adapter 30. When the bushing 1 is removed in this way, the pressure oil supply is stopped and the ram 13 is returned to complete the work.

Next, referring to FIG. 10, FIG. 12 shows a working state of fitting the bushing 1 to be replaced to the vehicle member 5. In FIG. 8, a new bushing 1 ′ to be replaced is placed on the vehicle member 5 having the bushing 1 removed, and the hydraulic actuator 10 is operated again. In this case, the bushing pressurizing adapter 40 is preferably used. ), A dedicated bushing pressurizing adapter 60 having the truncated cone-shaped hole 61 of FIG. 7 described above can be used.

On the other hand, in this work, it is necessary to raise the position of the ram 13 corresponding to the height of the bushing 1 'placed on the vehicle member 5, and the hydraulic actuator 10 is rotated in the direction of releasing the screw connection. Can be adjusted simply. When the hydraulic actuator 10 is operated after the preparation is completed, the ram 13 is lowered and the bushing 1 'is pressed by the bushing pressurizing adapter 60 to be inserted into the installation hole of the vehicle member 5, wherein the bushing As the inner sleeve end of the bushing 1 'is accommodated by the truncated cone-shaped hole 61 of the pressure adapter 60, the work can proceed without fear of damaging the bushing 1'.

However, the above conventional technologies have the following problems.

The conventional bushing replacement tool is a structurally complex and very inconvenient to fix the vehicle, such that the replacement of the bushing requires a lot of time and manpower.

Accordingly, the present invention has been made to solve the conventional problems as described above,

It is an object of the present invention to provide a bushing replacement tool for reducing the time and manpower required for bushing replacement work while simplifying assembly and installation by accommodating a bushing missing in a vehicle member with a simple structure.

In order to achieve the above object, the "butter replacement tool" according to the present invention, a lower groove is formed so that the upper end of the bushing on the lower surface, the upper adapter is formed in the center central hole between the upper surface and the lower groove Wow; A vehicle member for fixing the bushing is caught at an upper end, and the bushing separated from the vehicle member is formed in an elongated tubular shape having an upper portion open to be received while being lowered to a lower portion, and a closing portion is formed at a lower surface thereof so that the lower portion is closed. A lower adapter corresponding to a lower hole formed in a center of the closure part; A bolt in which a head is fitted through the lower through hole, the inner sleeve of the bushing, and the central through hole in a state where the head is caught by the closing part, and a nut is screwed to a portion exposed to the upper portion of the upper adapter; It is characterized by including.

The lower adapter of the bushing replacement tool according to the present invention may further include a seating jaw formed around the upper inner circumference of the lower adapter so that the lower circumference of the vehicle member is seated, and cut from the upper end of the lower adapter to the lower portion. It is characterized in that it further comprises a plurality of see-through grooves.

The bolt of the bushing replacement tool according to the present invention includes a thrust bearing fitted to the bolt under the head and a washer fitted between the lower surface of the thrust bearing and an upper surface of the head. It further comprises.

In addition, the "butter replacement tool" according to the present invention, the ram is installed in the lower portion of the cylinder actuated hydraulically, a through-hole is vertically formed in the center from the upper end of the cylinder to the lower end of the ram, the ram A hydraulic actuator in which an upper adapter is installed; It further comprises.

In addition, the hydraulic actuator of the "butter replacement tool" according to the present invention, the screw thread on the outer circumferential surface to be screwed to the spiral coupling hole formed in the periphery of the through hole to the lower surface of the ram, the length can be adjusted to the spiral coupling hole The length adjustment rod is formed, the mounting disc is mounted to the lower end of the length adjustment rod and the upper adapter is installed on the lower surface, and is formed through the center of the spiral coupling hole and the mounting disc to communicate with the through hole so that the bolt is penetrated Auxiliary through-holes, characterized in that it further comprises.

Further, the hydraulic actuator of the "bushing replacement work tool" according to the present invention further includes a plurality of first magnets attached to the lower surface of the mounting disc, wherein the upper adapter is inserted into the mounting disc. And an upper groove formed on an upper surface of the upper adapter to be bonded by the first magnet.

The hydraulic actuator of the " bushing tool for replacing work " according to the present invention is further characterized by further comprising a second magnet attached to the upper surface of the cylinder around the through hole.

On the other hand, in order to achieve the above object "bushing replacement tool" according to another embodiment of the present invention, the lower groove is formed so that the upper end of the bushing on the lower surface, the upper adapter is formed on the upper surface and ; A lower adapter having a vehicle member for fixing a bushing to an upper end thereof, the lower adapter being formed in an elongated tubular shape in which an upper portion thereof is opened so as to be received while the bushing separated from the vehicle member falls downward; A hydraulic actuator including a spiral portion installed in a lower portion of the hydraulically actuated cylinder, the upper adapter installed in the ram, and a spiral portion formed on an outer circumferential surface of the cylinder to enable a helical coupling; A support portion installed to the lower side of the lower adapter, a support portion coupled to the spiral portion to an upper side of the support portion, a pair of frames attached between the support portion and the support portion, and the support portion to pass through the bushing. A bracket having a through hole; It has a circular main body fitted to the through hole, the upper end of the circular main body is formed around the upper end of the catching jaw, and the multi-stage jaw is formed in multiple stages to narrow the inner diameter toward the lower side in the inner side of the circular body, A multistage member having lower ends of the lower adapters having different diameters mounted on the multistage jaws; It is characterized by including.

The bracket of the " bushing tool for replacing work " according to the present invention is characterized in that it further comprises a plurality of third magnets which are attached to the upper surface of the supporting part.

The present invention as described above has a simple structure and easy to assemble and install by accommodating the bushing missing in the vehicle member, and has the effect of significantly reducing the time and manpower required for the bushing replacement work.

1 is a schematic exploded perspective view of a tool for bushing replacement work according to a first embodiment of the present invention;

Figure 2 is a schematic longitudinal cross-sectional view showing a state of use of the tool for the bushing replacement operation according to a first embodiment of the present invention,

3 is a schematic exploded perspective view of a tool for bushing replacement work according to a second embodiment of the present invention;

4 is a schematic exploded bottom perspective view of a main part of a tool for replacing a bushing according to a second embodiment of the present invention;

5 is a schematic longitudinal sectional view showing a state of use of a tool for replacing a bushing according to a second embodiment of the present invention;

6 is a schematic partial exploded perspective view of a tool for bushing replacement work according to a third embodiment of the present invention;

7 is a schematic bottom bottom perspective view of a tool for replacing a bushing according to a third embodiment of the present invention;

8 is a schematic longitudinal sectional view showing a state of use of a tool for replacing a bushing according to a third embodiment of the present invention;

9 is a partial cutaway perspective view of a vehicle bushing;

10 to 12 are schematic views showing a conventional bushing replacement tool.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the present invention may be embodied in many different forms and should not be limited to the described embodiments.

1 is a schematic exploded perspective view of a tool for bushing replacement work according to a first embodiment of the present invention, and FIG. 2 is a schematic longitudinal sectional view showing a state of use of the tool for bushing replacement work according to the first embodiment of the present invention.

As shown therein, the tool for replacing the bushing according to the first embodiment of the present invention includes an upper adapter 100 positioned at the upper end of the bushing 1 and a lower adapter 200 positioned at the lower end of the bushing 1. ) And a bolt 300 installed through the upper adapter 100, the bushing 1, and the lower adapter 200.

The upper adapter 100 is a lower groove 101 is formed so that the upper end of the bushing (1) on the lower surface and the central through hole 102 is formed in the center between the upper surface and the lower groove 101, the bushing It is to be able to press the bushing (1) to the lower side in the state in which the upper surface of the (1) is fitted into the lower groove (101).

It is more preferable that the upper adapter 100 is formed such that an outer step is formed around the lower end of the lower end so that the outer step is caught on the upper surface of the outer sleeve 3 of the bushing 1. The central through hole 102 serves to provide a passage through which the bolt 300 is slidably penetrated.

The lower adapter 200 is fastened to the vehicle member (5) to secure the bushing (1) on the upper end is formed in a long tubular shape of the upper open and the lower portion is closed to form a closed portion 201 and the central through hole ( The lower through hole 202 is formed in the center of the closing part 201 in correspondence with the 102, and the bushing 1 detached from the vehicle member 5 inward while supporting the lower end of the vehicle member 5. ) Serves as a space to be accommodated while falling to the bottom.

The lower adapter 200 may be formed in various sizes according to the outer diameter of the vehicle member 5 to which the bushing 1 is fitted.

The closure 201 is to provide a place where the lower end of the bolt 300 is supported, the lower through hole 202 provides a passage through which the bolt 300 penetrates the closure 201. It plays a role.

The lower adapter 200 further includes a seating jaw 203 formed around an inner side of an upper end thereof, and a plurality of viewing grooves 204 formed by cutting downward from an upper end of the lower adapter 200.

The seating jaw 203 allows the lower end of the vehicle member 5 to be seated inside the lower adapter 200 so that the vehicle member 5 can be supported more precisely. In addition, the seating jaw 203 is more preferably formed such that the inner diameter is gradually narrowed toward the lower portion, that is, the inclined surface is formed on the inner circumferential surface so that the bushing 1 more easily fall into the inner side.

The sight groove 204 is to visually confirm that the bushing 1 is pulled out of the vehicle member 5 by the pressurization of the upper adapter 100 and received inside the lower adapter 200. .

The bolt 300 passes through the lower through hole 202, the inner sleeve 2 of the bushing 1, and the central through hole 102 with the head 301 caught on the lower surface of the closure 201. The nut 302 is screwed to a portion of the upper adapter 100 that is exposed to the upper portion of the upper adapter 100, and the lower adapter 200 is caught by the head 301 on the lower surface of the lower adapter 200. The nut 302 on the upper surface of the upper adapter 100 after being fitted through the lower through hole 202, the inner sleeve 2 of the bushing 1, and the central through hole 102 of the upper adapter 100. Screwed together.

The bolt 300 is provided between the thrust bearing 303 fitted to the bolt 300 to the lower portion of the head 301, the lower surface of the thrust bearing 303 and the upper surface of the head 301. It further comprises a washer (304) fitted to the bolt (300).

The thrust bearing 303 rotatably supports the head 301 to allow the bolt 300 to be easily rotated together with the head 301. The washer 304 supports between the lower surface of the head 301 and the upper surface of the thrust bearing 303 to allow the head 301 to be fixed to the upper surface of the thrust bearing 303.

The washer 304 is preferably fitted to the bolt 300 as the lower surface of the nut 302 so that the nut 302 is fixed to the upper surface of the upper adapter 100.

When the worker forcibly rotates the head 301 while the bolt 300 and the nut 302 are coupled as described above, the thrust bearing 303 caught by the washer 304 in the head 301. As the bolt is rotated so that the upper adapter 100 is pushed by the nut 302 to move to the lower side, the upper adapter 100 pushes the bushing 1 downward, thereby lowering the lower adapter ( The bushing 1 may be removed from the vehicle member 5 caught in the 200 or the bushing 1 may be inserted into the vehicle member 5.

Figure 3 is a schematic exploded perspective view of a tool for bushing replacement work according to a second embodiment of the present invention, Figure 4 is a schematic exploded bottom perspective view of a tool for a bushing replacement work according to a second embodiment of the present invention, Figure 5 Is a schematic longitudinal sectional view showing a state of use of a tool for bushing replacement work according to a second embodiment of the present invention.

As shown therein, the tool for replacing the bushing according to the second embodiment of the present invention includes an upper adapter 100, a lower adapter 200 positioned at a lower end of the bushing 1, and an upper adapter 100. And a bolt 300 installed through the bushing 1 and the lower adapter 200 and a hydraulic actuator 400 fitted with an upper end of the bolt 300.

The upper adapter 100 further includes an upper groove 103 formed on an upper surface thereof. The upper groove 103 is described below and serves to provide a place where the mounting disc 404 is installed to be attached to the hydraulic actuator 400 is fitted.

Since the lower adapter 200 and the bolt 300 have the same configuration as the first embodiment of the present invention described above, a detailed description thereof will be omitted, and the above description will be referred to.

The hydraulic actuator 400 has a ram 400b installed at a lower portion of the cylinder 400a which is hydraulically operated, and a through hole 401 perpendicular to the center from an upper end of the cylinder 400a to a lower end of the ram 400b. The upper adapter 100 is installed in the ram 400b, and the hydraulic pressure is supplied through the port on one side, and the bushing 1 is lowered while the ram 400b is lowered to the lower portion of the cylinder 400a. It acts to pressurize. The through hole 401 serves to provide a passage through which the bolt 300 penetrates.

The hydraulic actuator 400 is a lower surface of the ram 400b and a helical coupling hole 402 formed around the through hole 401 and an outer circumferential surface of the spiral coupling hole 402 to be screwed to be adjustable in length. Length adjustment rod 403 is formed in the thread, the mounting disk 404 is mounted to the lower end of the length adjustment rod 403 and the upper adapter 100 is installed on the lower surface, and the bolt 300 penetrates It further includes an auxiliary through hole 405 formed through the center of the spiral coupling hole 402 and the mounting disc 404 so as to communicate with the through hole 401.

The spiral coupling hole 402 is to provide a place where the length adjustment rod 403 is screwed, the length adjustment rod 403 is the lower surface of the ram 400b the mounting disc 404 up and down It is to be installed with the length adjusted. The mounting disc 404 is mounted in the inserted state in the upper groove 103 serves to assemble the upper adapter 100 and the hydraulic actuator 400. The auxiliary through hole 406 serves to provide a passage through which the bolt 300 passes.

The hydraulic actuator 400 further includes a plurality of first magnets 406 attached to the bottom surface of the mounting disc 404. The first magnet 406 is to allow the bottom surface of the mounting disc 404 to be bonded by magnetic force in a state of being inserted into the upper groove 103 of the upper adapter 100.

The hydraulic actuator 400 further includes a second magnet 407 attached to the upper surface of the cylinder 400a around the through hole 401. The second magnet 407 is the upper surface of the cylinder 400a is magnetically bonded to a vehicle or other metal parts so that the cylinder 400a can be easily fixed.

This tool is configured such that the hydraulic actuator 400, the upper adapter 100 and the lower adapter 200 to the bushing (1) in the state that the vehicle member (5) is fixed to the bolt 300 and the nut (302) By operating the hydraulic actuator 400 in a fixed state by walking with) to the upper adapter 100 to remove or insert the bushing (1) from the vehicle member (5).

FIG. 6 is a schematic partial exploded perspective view of a tool for replacing a bushing according to a third embodiment of the present invention. FIG. 7 is a bottom perspective view schematically illustrating a main portion of a tool for replacing a bushing according to a third embodiment of the present invention. Is a schematic longitudinal sectional view showing a state of use of a tool for replacing a bushing according to a third embodiment of the present invention.

As shown in the drawing, the hydraulic actuator 400 of the bushing replacement tool according to the third embodiment of the present invention further includes a spiral portion 408 formed on the outer circumferential surface of the cylinder 400a to be helically coupled. .

In addition, the tool is a support portion 501 is installed to the lower side of the lower adapter 200, the support portion 502 coupled to the spiral portion 408 to the upper side of the support portion 501, and the support portion And a bracket 500 having a pair of frames 503 attached between the 501 and the support 502, and a through hole 504 formed in the support 501 to allow the bushing 1 to pass therethrough. do.

The bracket 500 configured as described above serves to support the cylinder 400a through the frame 503 and the support 502 to the upper portion of the support 501. Here, the support 502 is screwed to the spiral portion 408 of the cylinder 400a to adjust the vertical position of the cylinder 400a in correspondence with the support 502.

The bracket 500 further includes a plurality of third magnets 505 that are attached to the upper surface of the support part 501. The third magnet 505 is to enable the multi-stage member 600 described below on the upper surface of the support 501 to be easily fixed to the upper surface of the support 500 by magnetic force.

The tool is a circular body 601 to be fitted into the through hole 504, a locking projection 602 formed around the upper end of the circular body 601 and caught on the upper surface of the support 501, and the circular body 601 has a multi-stage jaw 603 is formed in a multi-stage to narrow the inner diameter toward the lower side, the multi-stage member that is seated on the lower end of the lower adapter 200 having a different diameter to the multi-stage (603) ( 600).

The circular body 601 serves to provide a space in which the multi-stage jaw 603 is formed, and the locking jaw 602 has a lower surface thereof caught on an upper surface of the support part 501 to support the space. The circular body 601 is to be easily assembled to the portion 501.

The multi-stage 603 allows the lower adapter 200 having different outer diameters to be seated on the upper surface thereof so that the bushing 1 can be easily replaced by simply supporting the vehicle members 5 having different diameters. To be assembled.

The tool configured as described above adjusts the vertical position of the cylinder 400a through the spiral part 408 and the support part 502 in the state where the hydraulic actuator 400 is mounted to the bracket 500 and the length thereof. After adjusting the up and down position of the mounting disc 404 through the adjustment rod 403, the hydraulic actuator 400, the upper adapter 100, the lower adapter 200 and the multi-stage member 600 to the bracket 500 By operating the hydraulic actuator 400 in a fixed state to the upper adapter 100, the bushing (1) is removed or inserted into the vehicle member (5).

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Claims

An upper adapter 100 having a lower groove 101 formed on the lower surface of the bushing, and having a central through hole 102 formed in the center between the upper surface and the lower groove 101;

A vehicle member for fixing the bushing is caught at an upper end, and the bushing separated from the vehicle member is formed in an elongated tubular shape, the upper part of which is opened to be accommodated while falling down to the lower part, and the closing part 201 is formed on the lower surface of the lower part so as to be closed. A lower adapter 200 having a lower through hole 202 formed in the center of the closing part 201 in correspondence with the central through hole 102;

The head 301 is fitted through the lower through hole 202, the inner sleeve of the bushing, the central through hole 102 in a state of being caught by the lower surface of the closing portion 201, the upper portion of the upper adapter 100 A bolt 300 to which the nut 302 is screwed to the exposed portion;

Ram 400b is installed under the hydraulic cylinder 400a, and a through hole 401 is formed vertically from the upper end of the cylinder 400a to the lower end of the ram 400b, and the ram A hydraulic actuator 400 to which the upper adapter 100 is installed; Including,

The hydraulic actuator 400,

A spiral coupling hole 402 formed around the through hole 401 as a lower surface of the ram 400b;

A length adjusting rod 403 having a screw thread formed on an outer circumferential surface thereof so as to be screwed to the spiral coupling hole 402 to be adjustable in length;

A mounting disc 404 mounted to a lower end of the length adjusting rod 403 and having an upper adapter 100 installed on a lower surface thereof;

Further comprising a secondary through hole 405 formed through the center of the spiral coupling hole 402 and the mounting disc 404 in communication with the through hole 401 to pass through the bolt 300, characterized in that it further comprises Bushing replacement tool.
The method of claim 1,

The lower adapter 200,

A seating jaw 203 formed around an upper inner circumference of the lower adapter 200 to seat the lower circumference of the vehicle member;

A plurality of perspective grooves 204 formed by cutting from the upper end of the lower adapter 200 to the lower,

Bushing replacement work tool, characterized in that it further comprises.
The method of claim 1,

The bolt 300 is,

The thrust bearing 303 is fitted to the bolt 300 to the lower portion of the head 301,

Bushing replacement work tool, characterized in that it further comprises.
The method of claim 1,

The hydraulic actuator 400,

Further comprising a plurality of first magnets 406 embedded in the lower surface of the mounting disc 404,

The upper adapter 100,

Bushing replacement work tool, characterized in that it further comprises an upper groove (103) formed in the upper surface of the upper adapter (100) to be inserted into the mounting disc (404) and bonded by the first magnet (406).
The method of claim 1,

The hydraulic actuator 400,

A second magnet 407 attached to an upper surface of the cylinder 400a around the through hole 401,

Bushing replacement work tool, characterized in that it further comprises.
An upper adapter 100 having a lower groove 101 formed on the lower surface of the bushing, and having an upper groove 103 formed on the upper surface thereof;

A lower adapter 200 having a vehicle member for fixing a bushing to an upper end thereof, the lower adapter being formed in an elongated tubular shape in which an upper portion thereof is opened so as to be received while the bushing separated from the vehicle member falls downward;

The ram 400b is installed under the hydraulic cylinder 400a, and the upper adapter 100 is installed on the ram 400b, and the spiral is formed on the outer circumferential surface of the cylinder 400a to be helically coupled. A hydraulic actuator 400 including a part 408;

Support portion 501 is installed to the lower side of the lower adapter 200, the support portion 502 coupled to the spiral portion 408 to the upper side of the support portion 501, the support portion 501 and the support portion A bracket (500) having a pair of frames (503) attached between the (502) and through holes (504) formed in the support portion (501) to allow the bushing to pass therethrough;

The circular body 601 to be fitted into the through hole 504, the locking projection 602 formed around the upper end of the circular body 601 and caught on the upper surface of the support 501, and the circular body 601 The multi-stage member 600 has a multi-stage jaw 603 is formed in a multi-stage to narrow the inner diameter toward the lower side, the lower stage of the lower adapter 200 having a different diameter on the multi-stage jaw 603 is seated ; Including,

The bracket 500 is,

Further comprising a plurality of third magnets 505 embedded in the upper surface of the support portion 501,

The hydraulic actuator 400,

A spiral coupling hole 402 formed on a bottom surface of the ram 400b;

A length adjusting rod 403 having a screw thread formed on an outer circumferential surface thereof so as to be screwed to the spiral coupling hole 402 to be adjustable in length;

Bushing replacement tool is characterized in that it further comprises a mounting disc 404, which is mounted to the lower end of the length adjusting rod 403 and the upper adapter 100 is installed on the lower surface.
The method of claim 8,

The lower adapter 200,

A seating jaw 203 formed around an upper inner circumference of the lower adapter 200 to seat the lower circumference of the vehicle member;

A plurality of perspective grooves 204 formed by cutting from the upper end of the lower adapter 200 to the lower,

Bushing replacement work tool, characterized in that it further comprises.