KR101474861B1 - shock absorber - Google Patents

Abstract

The present invention relates to a shock absorber, comprising: a body having an interior hollow; a shock absorber tube slidably coupled to the body; and a shock absorber disposed in the body and supporting the shock absorber tube, Supports the load applied to the tube.

Description

Shock absorber

The present invention relates to a shock absorber.

Generally, when traveling on a motorcycle such as a bicycle, many vibrations and shocks occur due to the ground conditions. The vibration and shock are transmitted to the driver through the saddle to increase fatigue. Due to vibration and impact, the occupant is easily fatigued and can not make stable driving.

As a result, various shock absorbers have been found to mitigate the impact of the ground, but most of them are equipped with a buffer such as a spring. However, since the spring alone can not sufficiently serve as a buffer, the occupant's fatigue is not greatly reduced.

Patent Registration No. 10-0819724 (Mar. 31, 2008) Registration Utility Model No. 20-0145800 (Feb. 22, 1999)

The present invention provides a shock absorber that improves the load-bearing capacity and the shock-absorbing capacity against impact.

According to an embodiment of the present invention, a shock absorber includes an inner hollow body, a shock absorbing tube slidably coupled to the body, and a shock absorber disposed inside the body and supporting the shock absorber tube, And supports the load applied to the buffer tube.

The body includes a first tube having an inner part penetrating along the longitudinal direction and a second tube having one side connected to the first tube and the other side connected to the buffer tube and an operation chamber formed inside And the first tube, the second tube, and the inner space of the buffer tube may be connected to each other.

Wherein the buffer part comprises an inner tube rotatably disposed in the first tube and having a fluid chamber in which a working fluid is stored, and an inner tube having one side disposed in the fluid chamber and the other side connected to the buffer tube And may include an actuating portion movable with the buffer tube.

The operating portion includes a rod having one side disposed in the fluid chamber and the other side coupled to the buffer tube, a piston coupled to one side of the rod and pressurizing the working fluid, and a piston disposed inside the buffer tube, And an elastic body for applying an elastic force to the tube.

On the other side of the rod, a rotation preventing portion is formed along the longitudinal direction, the rotation preventing portion is in contact with the body and the buffer tube, and the buffer tube is not rotated in the circumferential direction by the rotation preventing portion.

The buffering part may further include a bearing tube having one side connected to the inner tube and installed to be rotatable together with the inner tube.

A rotation transmitting portion may be formed on a mating surface of the bearing tube and the inner tube so that the inner tube rotates along the bearing tube when the bearing tube rotates.

The shock absorber may further include a buffering force adjusting unit coupled to the body and having one side connected to the bearing tube and capable of rotating the bearing tube.

The buffering force adjusting portion includes a lever rotatably coupled to the outside of the body and a connecting pin having one side fixed to the lever and the other side coupled to the bearing tube, A hole may be formed in at least a part along the circumferential direction of the second tube.

The fluid chamber and the operation chamber are connected to each other by a flow path through which a working fluid moves. The flow path changes in cross sectional area according to the rotation of the inner tube, and the buffering force can be adjusted according to a change in sectional area of the flow path.

Wherein the flow path is formed along a circumferential direction at a portion where the first tube and the inner tube are in contact with each other in a longitudinal direction at a portion where the first tube and the inner tube are in contact with each other, A recovery fluid passage connected to one side of the tube fluid channel and the fluid chamber and having a check ball interposed therebetween for interrupting a working fluid, and a recovery fluid passage formed in the bearing tube, And the eccentric flow path may be formed at intervals along the longitudinal direction of the tube flow path, and the cross sectional area of the eccentric flow path may be changed from one side to the other side.

The fluid chamber and the operation chamber are connected by a plurality of flow paths.

The outer surface of the body and the inner surface of the buffer tube are in contact with each other, and at least one hermetic member may be provided between the body and the buffer tube.
A buffer according to an embodiment of the present invention includes a body having an operation chamber formed therein, a buffer tube connected to the body and capable of sliding on one side of the body by an external force and having an air chamber formed therein, An inner tube disposed inside the body and positioned so as not to overlap with the operation chamber and having a fluid chamber formed therein, a piston movable in the fluid chamber, and a piston connected to the fluid chamber, the operation chamber, And a rod that is coupled to the buffer tube at one side and is coupled to the piston at the other side and is movable by an external force applied to the buffer tube, wherein the fluid chamber and the operation chamber are connected by a flow path , The piston reciprocates only in the fluid chamber, Wherein the working chamber and the air chamber are connected by a gap smaller than a cross sectional area of the operation chamber and the air chamber and an external force is applied to the buffer tube so that the rod is moved into the body The air in the air chamber can be moved to the operation chamber through the gap or the oil in the operation chamber can be moved to the air chamber through the gap.
Even if the buffer tube slides, the shape of the buffer tube itself does not change.
A buffer according to an embodiment of the present invention includes a body having an empty space therein, a buffer tube slidably connected to the body, a buffer tube disposed inside the body and the buffer tube, one side coupled to the buffer tube, And a rod coupled to the piston, wherein the rod is provided with a rotation preventing portion along the longitudinal direction, the rotation preventing portion being in contact with the body and the buffer tube, and the buffer tube is moved in the circumferential direction .
A buffer according to an embodiment of the present invention includes a body, a buffer tube slidably connected to the body, an inner tube disposed in the body, a bearing tube disposed in the body and connected to the inner tube, And a rod having one side coupled to the cushioning tube and the other side coupled to a piston located within the inner tube, wherein when the bearing tube rotates, the inner tube is rotated with the bearing tube, The rotation transmitting portion is formed on the coupling surface of the inner tube, and the buffering force is adjusted in accordance with the rotation of the inner tube.
The buffer according to an embodiment of the present invention includes a body, a buffer tube slidably connected to the body, an inner tube disposed in the body, a bearing tube disposed in the body and coupled with the inner tube, And a buffering force adjusting unit installed on the body and capable of rotating the bearing tube. The buffering force adjusting unit includes a lever rotatably connected to the outside of the body, one side fixed to the lever, and the other side fixed to the bearing tube And a through hole through which the connection pin passes is formed in at least a portion of the body along a circumferential direction of the body.
A buffer according to an embodiment of the present invention includes a body having an operation chamber formed therein, a buffer tube connected to the body and capable of sliding on one side of the body by an external force and having an air chamber formed therein, An inner tube disposed inside the body and having a fluid chamber formed therein, a bearing tube disposed in the body and positioned between the fluid chamber and the operation chamber and connected to the inner tube, The fluid chamber and the operation chamber are connected by a plurality of flow paths, and the plurality of flow paths are connected to the body and the inner A tube channel formed along the longitudinal direction at a portion where the tube contacts with the tube, An eccentric flow path formed along a circumferential direction at a portion in contact with the inner tube and connected to the fluid chamber by an orifice hole formed in the inner tube, and an eccentric flow path formed in the bearing tube, one side connected to the tube flow path, And a bearing passage connected to the operation chamber, wherein the eccentric flow passage is formed at an interval along the longitudinal direction of the tube passage, and the cross sectional area of the eccentric flow passage changes from one side to the other side.

According to the embodiment of the present invention, the air and the working fluid support the load applied to the cushioning tube, and the speed control when the cushioning tube descends by the impact can be smoothly controlled by the hydraulic pressure. As a result, fatigue to the occupant of the two-wheeled vehicle can be minimized to provide a comfortable ride.

According to the embodiment of the present invention, since the rotation preventing portion is formed on the rod, the second tube and the buffer tube portion in contact with the rod, the buffer tube is not rotated even if an external force is applied to the buffer tube connected to the saddle. As a result, the saddle is not rotated so that the sense of ride can be improved.

1 is a cross-sectional view of a shock absorber according to an embodiment of the present invention;
2 is an exploded cross-sectional view of the shock absorber shown in Fig.
Fig. 3 is an enlarged view of the first tube and the inner tube portion shown in Fig. 1; Fig.
4 is a cross-sectional view of the first tube and the inner tube taken along line IV-IV shown in Fig.
5 is an exploded perspective view showing the inner tube and the bearing tube shown in Fig.
FIG. 6 is an exploded perspective view showing the operating part, the second tube and the buffer tube shown in FIG. 2; FIG.
7 is an enlarged sectional view showing the buffering force adjusting section shown in Fig.
FIG. 8 is a cross-sectional view of the buffer force adjusting section taken along the line VIII-VIII shown in FIG. 7; FIG.
Fig. 9 is an operational view showing the cushioning state of the shock absorber shown in Fig. 1. Fig.
10 is an enlarged view showing a main part shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.

A buffer according to an embodiment of the present invention will now be described with reference to FIGS. 1 and 2. FIG.

1 and 2, a shock absorber 200 according to an embodiment of the present invention is disposed between a body frame (not shown) of a bicycle and a saddle (not shown), and loads a load applied to the saddle And provides a comfort to the occupant by cushioning with a working fluid such as oil during impact. The shock absorber 200 includes a body 1, a cushioning tube 2, and a cushioning portion 3.

The body 1 has a predetermined length and includes a first tube 11 and a second tube 12 which are hollow inside.

The first tube 11 has a predetermined length. The inside of the first tube 11 penetrates along the longitudinal direction. A connection frame 13 coupled to the body frame may be coupled to one side of the first tube 11. The first tube 11 and the connecting frame 13 can be coupled in a forced or screwed manner.

The second tube 12 has a predetermined length through which the inside of the second tube 12 passes. The other side of the first tube 11 is inserted into one side of the second tube 12. A mood bolt 123 is coupled to the coupled portion of the second tube 12 and the first tube 11. The mud bolts 123 prevent the first tube 11 and the second tube 12 from being separated. However, the first tube 11 and the second tube 12 may be detachably coupled in a screw manner.

The second tube 12 has an operation chamber 121 through which air and a working fluid can flow. Steps 122a and 122b are formed on both sides of the operation chamber 121. [ The other side of the first tube 11 is in close contact with the one-side step 122a.

The buffer tube 2 is formed to have a predetermined length. In the inside of the buffer tube 2, an air chamber 21 opened in one direction is formed.

The other side of the second tube 12 is inserted into one side of the buffer tube 2. The saddle can be coupled to the other side of the buffer tube 2. The buffer tube 2 can slide along the longitudinal direction of the second tube 12 when a load is applied.

At least one hermetic member 24 is coupled between the second tube 12 and the buffer tube 2. The airtightness member 24 prevents air from leaking between the second tube 12 and the cushioning tube 2.

On the other hand, an air inlet 22 for injecting air into the air chamber 21 is formed on the other side of the cushioning tube 2. The air injection port 22 is provided with a cap 23 for interrupting air. The cap 23 is provided with a check valve (not shown). The check valve prevents air from being discharged from the air chamber 21 through the air inlet 22.

The buffering part (3) is disposed inside the body (1) and the buffering tube (2). The buffer part (3) buffers the load applied to the buffer tube (2) and shocks. The buffering portion 3 includes an inner tube 31 and an operating portion 34.

Referring to FIG. 3, the inner tube 31 is rotatably disposed on one side of the first tube 11. A fluid injection port 311 is formed in one side of the inner tube 31 and a fluid chamber 312 connected to the fluid injection port 311 is formed on the other side. Here, the fluid chamber 312 is open toward the other side of the inner tube 31.

In addition, a check ball 311a for interrupting the oil is disposed at a portion where the fluid injection port 311 and the fluid chamber 312 are connected. The check ball 311a opens in a direction in which oil flows into the fluid chamber 312. [

One side of the inner tube 31 is formed with a recovery flow path 313 for connecting the fluid injection port 311 and the first tube 11.

An orifice hole 314 for connecting the fluid chamber 312 and the first tube 11 is formed on the inner surface of the inner tube 31. The orifice holes 314 are formed at intervals along the longitudinal direction of the inner tube 31.

On the peripheral surface of the inner tube 31, an eccentric flow path 315 is formed as shown in Fig. The eccentric flow paths 315 are formed at intervals along the longitudinal direction of the inner tube 31.

4 and 5, one side of the eccentric flow path 315 is connected to the orifice hole 314. The eccentric flow path 315 may be formed within a range of 280 to 320 degrees (R1) with respect to the orifice hole 314. The cross sectional area of the eccentric flow path 315 becomes smaller from one side to the other side. At this time, the width and depth of the eccentric flow path 315 are reduced, and the sectional area thereof is reduced. However, either the width or the depth may be reduced and the cross-sectional area thereof may be reduced.

Referring again to FIG. 3, a tube channel 111 is formed on the inner surface of the first tube 11 along the longitudinal direction. The tube flow path 111 is connected to the eccentric flow path 315. A recovery space 112 connected to the recovery flow path 313 is formed on one inner peripheral surface of the first tube 11. A connecting space 113 is formed on the inner circumferential surface on the other side of the first tube 11. Here, the recovery space 112 and the connection space 113 are connected to the tube flow path 111.

Meanwhile, the buffer part 3 according to the present embodiment may further include a bearing tube 32.

2 and 7, the bearing tube 32 is rotatably disposed inside the other side of the first tube 11. The bearing tube 32 and the first tube 11 are in surface contact with each other. One side of the bearing tube (32) is located in the connection space (113). The circumferential surface of the connection space 113 and the circumferential surface of the bearing tube 32 are spaced apart.

At least a portion of the other side of the bearing tube 32 protrudes from the first tube 11 and the protruded portion is inserted into one side of the second tube 12 to be in contact with the inner surface of the second tube 12. [

Rotation transmitting portions 33a and 33b are formed at portions where the inner tube 31 and the bearing tube 32 are in contact with each other so that the inner tube 31 can rotate along the bearing tube 32 have. 5) The rotation transmitting portions 33a and 33b are formed in a planar shape at least a part of the circumferential surface where the inner tube 31 and the bearing tube 32 are in contact with each other. The inner tube 31 and the flat portion of the bearing tube 32 are brought into contact with each other so that the rotational force can be transmitted to the inner tube 31 when the bearing tube 32 rotates.

The rotation transmission portions 33a and 33b are formed in the same plane as the rotation transmission portions 33a and 33b in the case where the rotation transmission portions 33a and 33b are formed in the plane of the bolt passing through the overlapped portion of the bearing tube 32 and the inner tube 31, , Weld bead, and the like.

The other side of the bearing tube (32) is inserted into one side of the second tube (12). At this time, the other side of the bearing tube 32 is in contact with the circumferential surface of one step 122a of the second tube 12. A sealing member is disposed between the bearing tube 32 and the step 122a and between the bearing tube 32 and the first tube 11 to prevent leakage of oil and air.

In the bearing tube 32, a bearing flow path 321 is formed. The bearing flow path 321 connects the connection space 113 and the operation chamber 121. A pressure space 322 connected to the bearing passage 321 is formed between the bearing tube 32 and the inner tube 31. The pressure space 322 is also connected to the other side of the fluid chamber 312. In the pressure space 322, a check ball 322a for interrupting the flow of the working fluid is disposed.

The fluid chamber 312 and the operation chamber 121 are connected through the orifice hole 314, the eccentric flow path 315, the tube flow path 111, the connection space 113, and the bearing flow path 321.

On the other hand, the speed and the buffering force of the piston 341 can be adjusted according to the area of the eccentric flow passage 315 connected to the tube passage 111.

1 and 2, the operating portion 34 connects the buffer tube 2 and the inner tube 31 to support a load applied to the buffer tube 2, . The operating portion 34 may include a piston 341, a rod 342, and an elastic body 343.

The rod 342 is formed to have a predetermined length. The rod 342 is supported movably through the inside of the bearing tube 32 and the other step 122b of the second tube 12. One side of the rod 342 is located in the fluid chamber 312. The other side of the rod 342 is coupled to the other side of the buffer tube 2. The buffer tube 2 and the rod 342 are tightly coupled to each other so as not to be separated from each other.

6, a surface around the step 122b of the second tube 12 in contact with the rod 342, the rod 342, and the surface of the buffer tube 2, which are in contact with the rod 342, (35a, 35b, 35c) are formed on the inner surface of the housing (2). The rotation preventing portions 35a, 35b, and 35c are formed in a planar shape. The rotation preventing portion 35a formed on the rod 342 is formed along the length of the rod 342. [

The cushioning tube 2 is not rotated by an external force because the rotation preventing portion 35a of the rod 342 contacts the second tube 12 and the rotation preventing portions 35b and 35c of the cushioning tube 2.

Furthermore, the rotation preventing portion 35a of the rod 342 is also in contact with the rotation preventing portion 35c of the cushioning tube 2 to prevent the cushioning tube 2 from rotating.

On the other hand, a gap G (see FIG. 1) is formed between the circumferential surface of the rod 342 and the circumferential surface of the step 122b of the bearing tube 12. When a load is applied to the buffer tube 2, the air in the air chamber 21 flows into the operation chamber 121 through the gap G, or the oil in the operation chamber 121 flows through the gap G, (21). The rod 342 moves the piston 341 in the direction of the fluid injection port 311.

The piston 314 is coupled to one side of the rod 342. The piston 341 is movably disposed in the fluid chamber 312. A hermetic seal is maintained between the piston 341 and the fluid chamber 312 and pressurizes the oil in the fluid chamber 312 when the piston 341 moves.

The elastic body 343 is disposed in the air chamber 21. One side of the elastic body 343 is supported by the step 122b and the other side is supported by the other side inner surface of the buffer tube 2. The elastic body 343 applies an elastic force to the buffer tube 2 so as to be away from the second tube 12 and supports the load.

The buffer 200 according to the present embodiment may further include a buffer capacity adjusting unit 36. Referring to FIGS. 7 and 8, the buffering force adjusting unit 36 adjusts the buffering force by changing the sectional area of the eccentric flow path 315 facing the tube flow path 111. The buffering force adjusting portion 36 includes a lever 361 and a connecting pin 362.

The lever 361 is formed in a cylindrical shape. The lever 361 surrounds the outside of the first tube 11 and the second tube 12. The lever 361 can rotate along the circumferential direction of the tube 11, 12. (Not shown) may be formed on the lever 361 and the tubes 11 and 12 and the graduation display portion may have a buffering force varying depending on the cross-sectional area of the eccentric flow passage 315 contacting the tube passage 111 Displays the size.

The connection pin 362 has a predetermined length and is formed in a mood bolt shape. The connecting pin 362 has an end fixed to the bearing tube 32 through the lever 361 and the first tube 11.

A through hole 114 is formed in the first tube 11 through which the connection pin 362 passes. The through hole 114 is formed along the circumferential direction of the first tube 11. The through-hole 124 may be formed in the range of 280 to 320 degrees (R2). The lever 361 can rotate along the circumferential direction of the first tube 11 within the range where the through hole 124 is formed.

When the lever 361 is rotated by the connecting pin 362 connecting the lever 361 and the bearing tube 32, the bearing tube 32 rotates and further the bearing tube 32 and the rotation transmitting portions 33a and 33b The inner tube 31 connected to the inner tube 31 rotates together. The connection position of the tube passage 111 and the eccentric passage 315 is set by the rotation of the inner tube 31 and the speed and buffering force of the piston 341 can be adjusted.

Next, the operation of the buffer described above will be described with reference to Figs. 9 and 10. Fig.

Referring to FIG. 9, viscous oil is injected into the fluid chamber 312 of the shock absorber 200 through the fluid inlet 311. Air is injected into the air chamber 21 through the air inlet 22, . Depending on the injection pressure of oil and air, it is possible to adjust the support load and the buffering force according to the impact.

The body frame 100a is coupled to the connection frame 13 of the shock absorber 200 and the saddle 100b is coupled to the shock absorber 2.

When an impact is applied to the cushioning tube 2 through the saddle, the cushioning tube 2 slides in the direction of the first tube 11 from the second tube 12. At this time, the inner surface of the buffer tube 2 pressurizes the air, and some air may flow into the operation chamber 121 through the gap G. However, when the operation chamber 121 is sufficiently filled with oil, the oil may move to the air chamber 21 through the gap G. [

By the movement of the buffer tube 2, the rod 342 presses the piston 341 toward the fluid injection port 311. The piston 341 moves in the direction of the fluid injection port 311 and presses the oil in the front space of the piston 341.

Referring to FIG. 10, the check ball 311a at the lower end blocks the fluid injection port 311 by the oil pressure, so the oil moves to the eccentric flow passage 315 through the orifice hole 314. The working fluid moved to the eccentric flow path 315 moves to the connection space 113 through the tube flow path 111.

The working fluid introduced into the connection space 113 moves to the operation chamber 21 through the bearing flow path 321.

The speed of the piston 341 for pressurizing the oil may be varied depending on the area of the eccentric flow path 315 facing the tube flow path 111. A part of the oil which enters the bearing passage 321 through the tube passage 111 and the connection space 113 pushes the check ball 322a at the upper end downward and flows through the pressure space 322 to the rear of the piston 341 Space.

It is possible to prevent the rear space of the piston 341 from being evacuated by the oil supplied to the rear space of the piston 341.

By adjusting the cross-sectional area of the portion of the eccentric flow passage 315 connected to the tube passage 111 when the oil moves from the fluid chamber 312 to the operation chamber 121, the buffer force generated in the buffer and the movement speed of the piston can be adjusted .

On the contrary, when the load applied to the buffer tube 2 is removed, the elastic body 343 is restored and the buffer tube 2 moves in a direction away from the first tube 11 by the compressed air.

And the movement of the cushioning tube 2 causes the rod 342 and the piston 341 to move away from the fluid injection port 311. At this time, the piston 341 pressurizes the oil located in the rear space. The pressurized oil presses the upper check ball 322a upwardly to block the connected portion of the bearing passage 321 and the pressure space 322.

The volume of the front space of the piston 341 is widened because the piston 341 moves in the direction away from the fluid injection port 311. [

The oil in the operation chamber 121 flows into the recovery space 112 through the bearing flow path 321, the connection space 113, and the tube flow path 111 by its own weight. The oil introduced into the recovery flow path 313 through the recovery space 112 pushes the check ball 311a and flows into the fluid chamber 312 or the front space of the piston 341. [

The oil introduced into the tube channel 111 may be introduced into the fluid chamber 312 through the eccentric channel 315 and the orifice hole 314 formed on one side of the inner tube 31.

In the shock absorber 200 according to the present embodiment, the load that can be supported by the pressure of the air injected into the air chamber 21 is determined, and the buffering speed control at the time of impact can be smoothly controlled by the hydraulic pressure. Therefore, the fatigue applied to the passenger of the two-wheeled vehicle equipped with the shock absorber 200 is minimized and a comfortable ride is provided.

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 exemplary embodiments, Of the right.

100a: Body frame 100b: Saddle
200: buffer
1: Body 11: First tube
111: tube tube 112: recovery space
113: connection space 114: through hole
12: second tube 121: operation chamber
122a and 122b: step 123: mood bolt
13: connection frame 2: buffer tube
21: air chamber 22: air inlet
23: cap 24: airtight member
3: buffering portion 31: inner tube
311: Fluid inlet 311a: Check ball
312: fluid chamber 313:
314: Orifice hole 315: Eccentric flow path
32: bearing tube 321: bearing channel
322: pressure space 322a: check ball
33a, 33b: rotation transmitting portion 34:
341: piston 342: rod
343: elastic body 35a, 35b:
36: buffer force adjusting unit 361: lever
362: Connection pin R1: Eccentric flow path forming range
R2: Through-hole forming range G: Clearance between rod and step

Claims (13)

A body having an operation chamber formed therein,
A buffer tube connected to the body and slidable on one side of the body by an external force and having an air chamber formed therein,
An inner tube disposed inside the body and not in overlap with the operation chamber, the inner tube having a fluid chamber formed therein,
A rod which is positioned at the same time in the air chamber, the operation chamber and the fluid chamber, one side of which is engaged with the buffer tube, and which can be moved by an external force applied to the buffer tube,
A piston coupled to the other side of the rod and moving in the fluid chamber with movement of the rod,
/ RTI >
Wherein the fluid chamber and the operation chamber are connected by a flow passage, the operation chamber and the air chamber are connected by a gap smaller than a cross sectional area of the operation chamber and the air chamber,
When an external force is applied to the buffer tube and the rod is drawn into the body, air in the air chamber moves to the operation chamber through the gap or oil in the operation chamber flows through the gap into the air chamber Mobile
buffer. The method of claim 1,
The body includes a first tube and a second tube having one side connected to the first tube and the other side connected to the buffer tube and having an operation chamber formed therein,
Wherein an inner tube is disposed inside the first tube and the piston is movable only in the fluid chamber formed in the inner tube and the shape of the buffer tube does not change even if the buffer tube slides
buffer. 3. The method of claim 2,
And a bearing tube disposed inside the body and connected to the inner tube, the bearing tube being installed to be rotatable together with the inner tube. 3. The method of claim 2,
Wherein the fluid chamber and the operation chamber are connected by a plurality of flow paths, the flow path changes in cross sectional area according to the rotation of the inner tube, and the buffering force is adjusted in accordance with a change in sectional area of the flow path. An empty body,
A cushioning tube slidably connected to the body,
And a piston which is located inside the body and inside the buffer tube and has one side coupled to the buffer tube and the other side coupled to the piston,
/ RTI >
Wherein the rod is provided with a rotation preventing portion along the longitudinal direction, the rotation preventing portion is in contact with the body and the buffer tube, and the buffer tube is not rotated in the circumferential direction by the rotation preventing portion. delete body,
A buffer tube slidably connected to the body,
An inner tube disposed inside the body,
A bearing tube disposed in the body and connected to the inner tube,
A rod having one end coupled to the cushioning tube and the other end coupled to a piston located within the inner tube,
/ RTI >
Wherein a rotation transmitting portion is formed on a coupling surface of the bearing tube and the inner tube so that the inner tube rotates together with the bearing tube when the bearing tube rotates, and the buffering force is controlled according to the rotation of the inner tube. 8. The method according to claim 3 or 7,
And a buffering force adjusting unit installed on the body and connected to the bearing tube to rotate the bearing tube. body,
A buffer tube slidably connected to the body,
An inner tube disposed inside the body,
A bearing tube disposed within the body and coupled with the inner tube,
A buffering force adjusting unit installed on the body and capable of rotating the bearing tube,
Lt; / RTI >
The buffering-
A lever rotatably connected to the outside of the body and
And one end of which is fixed to the lever and the other end of which is connected to the bearing tube
/ RTI >
And a through hole through which the connection pin passes is formed in at least a part of the body along the circumferential direction of the body
buffer. A body having an operation chamber formed therein,
A cushioning tube connected to the body and slidable on one side of the body by an external force and having an air chamber formed therein,
An inner tube disposed inside the body and having a fluid chamber formed therein,
A bearing tube disposed within the body and positioned between the fluid chamber and the actuating chamber, the bearing tube being connected to the inner tube,
A rod having one side coupled to the buffer tube and the other side coupled to a piston located in the fluid chamber,
Lt; / RTI >
Wherein the fluid chamber and the operation chamber are connected by a plurality of flow paths,
The plurality of flow paths
A tube channel formed along the longitudinal direction at a portion where the body and the inner tube are in contact with each other,
An eccentric flow passage formed along a circumferential direction at a portion where the body and the inner tube are in contact with each other, one side of which is connected to the fluid chamber by an orifice hole formed in the inner tube,
A bearing tube formed on the bearing tube and having one side connected to the tube channel and the other side connected to the operation chamber,
/ RTI >
Wherein the eccentric flow path is formed at intervals along the longitudinal direction of the tube channel, and the cross-sectional area of the eccentric flow path changes from one side to the other side
buffer. 11. The method of claim 10,
Further comprising a return flow path for connecting the opposite side of the tube channel to the fluid tube connected to the bearing tube, wherein when the rod is drawn out, the oil of the return flow path pushes the check ball disposed in the inner tube, A shock absorber moving into the fluid chamber. 11. The method of claim 10,
And a check ball disposed between the bearing channel and the fluid chamber, wherein the check ball is opened when the piston is drawn in and closed when the piston is drawn out. The method of claim 1,
Wherein the outer surface of the body and the inner surface of the buffer tube are in contact with each other so that the buffer tube slides on the outer surface of the body and at least one hermetic member is provided between the body and the buffer tube.

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