KR20170052120A - Cylinder unit having stopping function - Google Patents

Cylinder unit having stopping function Download PDF

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Publication number
KR20170052120A
KR20170052120A KR1020150154160A KR20150154160A KR20170052120A KR 20170052120 A KR20170052120 A KR 20170052120A KR 1020150154160 A KR1020150154160 A KR 1020150154160A KR 20150154160 A KR20150154160 A KR 20150154160A KR 20170052120 A KR20170052120 A KR 20170052120A
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KR
South Korea
Prior art keywords
cylinder
piston rod
piston
hole
pin
Prior art date
Application number
KR1020150154160A
Other languages
Korean (ko)
Inventor
곽수만
주정환
이남수
Original Assignee
(주)에이스 힌지텍
주식회사 다옴텍
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Publication date
Application filed by (주)에이스 힌지텍, 주식회사 다옴텍 filed Critical (주)에이스 힌지텍
Priority to KR1020150154160A priority Critical patent/KR20170052120A/en
Publication of KR20170052120A publication Critical patent/KR20170052120A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The present invention relates to a cylinder assembly comprising a cylinder assembly and a stopper,
The structure of the present invention comprises a cylinder for containing oil; A piston having a tubular shape and having an enlarged portion corresponding to the inner wall of the cylinder at the other end side wall and having a through hole formed in the side wall of the intermediate portion; A piston rod connected to one end of the piston; A sealer provided at one end of the cylinder in a shape slidably surrounding a side of the piston rod; An operation pin slidably installed in the piston rod in the longitudinal direction and having an opposite end opened and closed at the other end of the piston according to a sliding position; And an operation unit installed at one side of the piston rod to adjust sliding movement of the operation pin.

Description

[0001] CYLINDER UNIT HAVING STOPPING FUNCTION [0002]

The present invention relates to a cylinder assembly having a stopping function, and more particularly, to a structure in which oil separated and contained in a cylinder through a piston is selectively flowed through a configuration of a piston rod and an operating pin, To a cylinder assembly having a stopping function that can conveniently lock the engaged state.

The cylinder assembly refers to a device configured to buffer the impact of an article connected through a gas or oil flow received in a cylinder.

Such a cylinder assembly is usually constructed such that a piston connected to a cylinder and a piston rod receive the pressure of gas or oil received inside the cylinder and flow so as to transmit a buffering force to the article connected to the cylinder and the piston rod .

For example, a conventional cylinder assembly structure has a structure in which a cylinder capable of accommodating gas or oil inside a cylinder, and a piston provided inside the cylinder and flowing in a longitudinal direction of the cylinder, The present invention has been proposed to improve a cylinder in which a gas or an oil is accommodated or to improve a coupling relation between a cylinder and a piston rod to increase the buffering force.

However, in the conventional cylinder assemblies, it is possible to improve the coupling relation between the cylinder and the piston rod or improve the cylinder or piston rod to increase the buffering force of the cylinder assembly. However, the position of the piston rod, which is slidably engaged with the cylinder, There is a problem in that it is difficult to keep the cylinder and the piston rod in a locked state smoothly when the cylinder and the piston rod are kept in a locked state.

(1) Korean Unexamined Patent Publication No. 2002-0040202 (May 30, 2002) (2) Korean Registered Patent Registration No. 10-1396236 (Apr. 20, 2014)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is as follows.

First, the oil accommodated in the cylinder flows selectively through the structure of the operation pin coupled to the inside of the piston rod, so that the locking state of the cylinder and the piston rod can be conveniently achieved according to the adjustment of the operation unit of the user .

Second, the operation pin coupled to the piston rod is controlled through the operation unit, so that the lock state of the cylinder and the piston rod can be conveniently and efficiently controlled according to the adjustment of the operation unit.

Third, by forming a pressure space for accommodating the gas through the construction of the free piston which is coupled to the inside of the cylinder, the overall buffering force of the cylinder assembly can be improved.

Fourthly, by forming the inside of the cylinder to form a divided space, separating the oil for controlling the flow of the piston rod to the inside of the divided space and the gas for improving the buffering force of the piston rod, It is possible to flexibly cope with changes in the volume, volume, and pressure of the gas and oil contained therein and to achieve a stable use of the cylinder assembly.

According to an aspect of the present invention, there is provided an oil pump comprising: a cylinder for containing oil; A piston having a tubular shape and having an enlarged portion corresponding to the inner wall of the cylinder at the other end side wall and having a through hole formed in the side wall of the intermediate portion; A piston rod connected to one end of the piston; A sealer provided at one end of the cylinder in a shape slidably surrounding a side of the piston rod; An operation pin slidably installed in the piston rod in the longitudinal direction and having an opposite end opened and closed at the other end of the piston according to a sliding position; And an operation unit installed on one side of the piston rod to adjust sliding movement of the operation pin.

At this time, the piston defines a connection hole to which the piston rod is connected and a flow hole connected to the connection hole and the through hole at the other end of the extension portion corresponding to the connection hole, and the piston rod is slidable And a guide hole for engaging with each other.

The operation pin may include an operation bar slidably engaged with the guide hole, and a valve provided at one end of the operation bar to open and close the flow hole according to a sliding position of the operation bar.

The operation unit may include a fixture provided on one side of the piston rod with a connection ring, and a control lever hinged to the fixture and connecting one end to the operation pin.

In addition, a free piston may be further coupled to form a gas receiving portion for receiving a gas inside the cylinder.

According to the present invention, the oil that is divided and contained in the cylinder through the piston is selectively flowed through the structure of the piston rod and the operating pin engaged with the cylinder, so that the combination of the cylinder and the piston rod The state can be conveniently adjusted.

In addition, since the oil accommodated in the cylinder is configured to flow in the cylinder only through the operating pin combined with the piston rod, the combined state of the cylinder and the piston rod can be efficiently and stably controlled.

A pressure space is formed in the cylinder through the construction of the free piston which is coupled to the inside of the cylinder and the buffer force of the cylinder and the piston rod is improved through the gas accommodated in the pressure space to improve the buffering capacity of the entire cylinder assembly. have.

In addition, unnecessary troubles can be prevented and stable use can be achieved without a complicated fastening structure, thereby ensuring convenience in use, preventing unnecessary manufacturing costs and maintenance costs from being increased, and achieving stable use.

1 is a side sectional view showing a cylinder assembly having a stopping function according to the present invention.
FIG. 2 is an enlarged view of a main portion showing a combined state of a cylinder, a piston, and a piston rod according to FIG. 1; FIG.
3 is a side sectional view showing an operating state of a cylinder assembly having a stopping function according to the present invention.
Fig. 4 is an enlarged view of the main portion showing the operating states of the cylinder and the piston rod according to Fig. 3; Fig.
5 is a cross-sectional side view of a cylinder assembly having a stopping function according to the present invention.
FIG. 6 is another cross-sectional side view of a cylinder assembly having a stopping function according to the present invention. FIG.

The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings, but the inventor may appropriately define the concept of the term to describe its invention in the best way Can be interpreted as meaning and concept consistent with the technical idea of the present invention.

It should be noted that the embodiments described in this specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that various equivalents and modifications may be present.

The present invention relates to a cylinder (10) for containing oil (O); A piston 20 having a tubular shape and having an enlarged portion 21 which is in close contact with an inner wall of the cylinder 10 at a side wall of the other end portion and a through hole 22 is formed in a side wall of the intermediate portion; A piston rod 30 connected to one end of the piston 20; A sealer (40) installed at one end of the cylinder (10) so as to slidably surround the side of the piston rod (30); An operating pin (50) slidably installed in the piston rod (30) in the longitudinal direction, and the other end of which opens and closes the other end of the piston (20) according to the sliding position; And an operation unit (60) installed at one side of the piston rod (30) to adjust the sliding movement of the operation pin (50).

The cylinder 10 has the same function and configuration as a conventional cylinder capable of accommodating oil O or gas G inside the cylinder 10 as shown in FIGS. 1 to 4 A detailed description thereof will be omitted.

1 to 4, the cylinder 10 of the present invention includes a piston 20 installed inside the cylinder 10 and a piston rod (not shown) coupled to the piston 20 so as to be concentric with the piston 30, the inner space of the cylinder 10 accommodating the oil O is divided around the piston 20 as a center.

In this configuration, the oil (O) accommodated in the cylinder (10) is divided into the inside of the cylinder (10) through the structure in which the piston (20) and the piston rod And only when the actuating pin 50 slidably engaged with the piston rod 30 is adjusted by the user's choice, as shown in Fig. 4, So that the oil 0 can flow.

1 to 4, the piston 20 is formed by forming an extension 21 which is in close contact with the inner wall of the cylinder 10, And a through hole (22) is formed in the side wall of the portion.

When the piston 20 and the piston rod 30 are coupled to the inside of the cylinder 10 as shown in FIGS. 1 to 4, the shaft portion of the piston rod 30 can be slidably A sealer 40 is installed to form a wrapping shape.

1 to 4, oil (O) stored in the cylinder 10 flows through the cylinder 20 due to the flow of the piston 20 and the piston rod 30 10 to the outside.

2 and 4, the piston 20 includes a connecting hole 23 to which the piston rod 30 is connected and a connecting hole 23 to which the connecting hole 23 is connected, And a flow hole (24) connected to the connection hole (23) and the through hole (22) at the other end.

As shown in FIGS. 2 and 4, the connection hole 23 allows the piston rod 30 to be smoothly coupled to one side of the piston 20, and as shown in FIGS. 1 to 4, And one side of the piston rod 30 can be coupled to the inside of the connection hole 23.

However, the connection hole 23 may be deleted according to the user's selection, and the piston rod 30 may be integrally connected to one side of the piston 20.

As shown in FIGS. 1 to 4, the flow hole 24 is connected to the connection hole 23 and the through hole 22, as shown in FIGS. 2 and 4, So that the oil O divided and accommodated in the cylinder 10 through the oil passage 20 can flow only by the flow of the piston 20.

That is, the flow hole 24 is formed in the flow hole 24 through the structure of the piston rod 30 coupled to the connection hole 23 of the piston 20 and the operation pin 50 coupled to the piston rod 30, 2 and 4, when oil is selectively opened and closed, the oil (0) divided and contained in the cylinder 10 through the piston 20 is supplied to the cylinder 10 in which the piston 20 is installed, So that it can smoothly flow in the longitudinal direction of both sides.

The structure in which the piston rod 30 and the actuating pin 50 are coupled will be described in detail.

The piston rod 30 includes a guide hole 31 into which the actuating pin 50 is slidably engaged.

1 to 4, the guide hole 31 is formed in the guide hole 31 so as to smoothly engage the operation pin 50 to the inside of the piston rod 30. As shown in FIGS. 1 to 4, By coupling the actuating pin 50 to be able to flow inside the connecting hole 23 and the flow hole 24 of the piston 20 when the actuating pin 50 is coupled to the inside of the piston 20, The flow hole 24 of the piston 20 is connected to the operation pin 50 through the structure of the piston rod 30 connected to the piston 20 and the operation pin 50. [ 50 can be selectively opened and closed.

Particularly, when the fluid hole 24 of the piston 20 is selectively opened and closed through the operation pin 50 through the above-described coupling, the piston rod 30 to which the operation pin 50 is coupled, The piston 20 is controlled so as to flow simultaneously in the longitudinal direction of the cylinder 10 so that the oil 0 divided and accommodated in the cylinder 10 flows smoothly through the flow hole 24 of the piston 20, .

The actuating pin 50 includes an actuating bar 51 slidably coupled to the connecting hole 23 of the piston 20 and an actuating bar 51 provided at one end of the actuating bar 51, And a valve (52) for opening and closing the flow hole (24) in accordance with the sliding position of the valve seat.

For example, the operation bar 51 is inserted into the guide hole 31 of the piston rod 30 to be able to flow in the longitudinal direction of the piston rod 30, and the valve 52 is connected to the piston 20 so as to selectively open and close the flow holes 24 of the flow holes 24. [

2 and 4, when the user moves the operating bar 51 along the guide hole 31 of the piston rod 30 as described above, the piston 20 The valve 52 is in close contact with or separated from the flow hole 24 so that the flow hole 24 can be opened and closed smoothly.

5 and 6, the operation pin 50 is operated through an operation unit 60 installed on one side of the piston rod 30, and the operation unit 60 for this operation pin 50, A hinge h is connected to the fixture 61 and the other end of the hinge h is connected to the operation pin 50. The hinge h is connected to the fixture 61, And an adjusting lever 62 to be connected.

1 to 6, the adjusting lever 62 is provided on the outer side of the piston rod 30 coupled with the cylinder 10, and the adjusting lever 62 is fixed to the fixing hole 61, And one end of the piston rod 30 is connected to the actuating bar 51 of the actuating pin 50 coupled to the sliding hole 31 of the piston rod 30.

5 and 6, the operating bar 51 of the actuating pin 50 corresponds to the flow of the adjusting lever 62, 5 and 6, the valve (not shown) of the operating pin 50, which is brought into close contact with the flow hole 24 of the piston 20, 52) The user can smoothly control the flow.

5 and 6, it is preferable that the control lever 62 is configured to be controlled through an operation means such as a wire w, and the operation means is described in detail in the present invention (Not shown), a hydraulic cylinder (not shown), a gear assembly (not shown), and the like, as well as the illustrated wire w as well as the illustrated wire It is possible to apply various configurations according to the selection of the < RTI ID = 0.0 >

5 and 6, the adjustment lever 62, which is hinged to the fixture 61 constituting the operation unit 60, is connected to the wire w, It is most preferable to configure the operation to be performed through a simple configuration such as the above.

5 and 6, a free piston 70 is further coupled to the cylinder 10 so as to form a gas receiving portion 10b for accommodating the gas G in the cylinder 10, .

5 and 6, the free piston 70 is coupled to one side of a piston 20 which is coupled to the inside of the cylinder 10, So that the gas G can be divided and accommodated.

6, the connection ring 61a of the fixture 61 to be coupled to the piston rod 30 and the connection ring 10a of the cylinder 10 to transmit a buffering force to the connection ring 10a of the cylinder 10 Is intended to improve the overall buffering force of the cylinder assembly through engagement of the piston rod (30) and the cylinder (10) when joining the articles (m) respectively.

That is, even when the piston rod 30 flows into the cylinder 10 to change the engagement position of the cylinder 10 and the piston rod 30, the cylinder 10 to which the piston rod 30 is coupled The piston 20 and the piston rod 30 are caused to continuously communicate with each other by allowing the pressure of the gas containing portion 10b containing the gas G to be continuously transmitted in the direction of the piston 20 inside the cylinder 10, So that the buffering force of the cylinder assembly can be maintained.

The oil O controlling the flow of the piston 20 and the piston rod 30 through the above configuration and the gas G for improving the buffering force of the piston 20 and the piston rod 30 Even when the volume, volume and pressure of the gas G and the oil O accommodated inside the cylinder change due to the change in the external temperature, the cylinder 10 and the piston 20 can be flexibly accommodated, , And the piston rod (30), the buffering force can be stably maintained.

In addition, when the valve 52 of the operation pin 50 blocks the flow hole 24 of the piston 20 due to the nature of the fluid in which the oil O accommodated in the cylinder 10 can not be compressed The gas G in the pressure space 10b formed through the construction of the free piston 70 is supplied to the cylinder 10 and the piston rod 30 in a state in which the cylinder 10 and the piston rod 30 are stably stopped. When the volume of the oil O accommodated in the cylinder 10 changes due to the change in the external temperature, the volume of the oil O accommodated in the expansion space So that the stability and efficiency of the cylinder assembly can be ensured.

In addition, a plurality of seals 80 are provided at the connecting portions of the cylinder 10, the piston 20, the piston rod 30, the operating pin 50, and the free piston 70.

The seal 80 includes a piston 20 and a piston rod 30 coupled to the inside of the cylinder 10 and an operation pin 50 engaged with the guide hole 31 of the piston rod 30, It is possible to prevent the oil 10 from flowing into the respective connected portions of the cylinder 10 and the piston 20 and the piston rod 30, Can be made to flow only through the flow of the operation pin (50) slidingly engaged with the guide hole (31) of the cylinder (30), so that the user can more smoothly adjust the state of engagement between the cylinder (10) and the piston rod will be.

As described above, according to the present invention, when the user moves the operation pin 50, which is engaged with the guide hole 31 of the piston rod 30, by adjusting the operation unit 60 as shown in FIG. 5 The valve 52 of the actuating pin 50 falls in a state of being in close contact with the flow hole 24 of the piston 20 in order to suppress the oil flow inside the cylinder 10 so that the length of the cylinder 10 The flow of the piston 20 and the piston rod 30 can be smoothly achieved along the direction of the piston 20. On the contrary, when the operation unit 60 is adjusted as shown in FIG. 6, The valve 52 of the actuating body 50 closely contacts the hole 24 to firmly block the flow hole 24 so that the engaged state of the piston rod 30 coupled to the cylinder 10 is stopped It can be maintained smoothly.

As described above, according to the present invention, the coupling state of the cylinder and the piston rod can be conveniently adjusted and used according to the adjustment of the operation unit of the user, so that not only the buffering capacity of the cylinder assembly can be ensured, The stopping state can be efficiently and smoothly achieved.

Description of the Related Art [0002]
10: cylinder 20: piston
21: extension part 22: through hole
23: connecting hole 24: floating ball
30: Piston rod 31: Guide ball
40: sealer 50: actuating pin
51: Operation bar 52: Valve
60: Operation unit 61: Fixture
61a: connecting ring 62: adjusting lever
70: Free piston 80: Seal
O: Oil G: Gas

Claims (5)

A cylinder (10) for receiving the oil (O);
A piston 20 having a tubular shape and having an enlarged portion 21 which is in close contact with an inner wall of the cylinder 10 at a side wall of the other end portion and a through hole 22 is formed in a side wall of the intermediate portion;
A piston rod 30 connected to one end of the piston 20;
A sealer (40) installed at one end of the cylinder (10) so as to slidably surround the side of the piston rod (30);
An operating pin (50) slidably installed in the piston rod (30) in the longitudinal direction, and the other end of which opens and closes the other end of the piston (20) according to the sliding position; And
And an operation unit (60) installed at one side of the piston rod (30) to adjust the sliding movement of the operation pin (50).
The method according to claim 1,
The piston (20)
A connecting hole 23 to which the piston rod 30 is connected and a connecting hole 23 which is connected to the connecting hole 23 and the through hole 22 at the other end of the extending portion 21 corresponding to the connecting hole 23, (24)
The piston rod (30)
And a guide hole (31) for slidably coupling the operation pin (50) to the inside of the cylinder block.
3. The method of claim 2,
The actuating pin (50)
An operation bar 51 slidably engaged with the guide hole 31,
And a valve (52) provided at one end of the operating bar (51) for opening and closing the flow hole (24) according to a sliding position of the operating bar (51) Assembly.
The method according to claim 1,
The operation unit (60)
A fixture 61 having a connection ring 61a and installed on one side of the piston rod 30,
And a control lever (62) connecting a hinge (h) to the fixture (61) and connecting one end to the actuating pin (50).
The method according to claim 1,
Wherein a free piston (70) is further coupled to form a gas receiving portion (10b) for accommodating gas (G) in the cylinder (10).
KR1020150154160A 2015-11-03 2015-11-03 Cylinder unit having stopping function KR20170052120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150154160A KR20170052120A (en) 2015-11-03 2015-11-03 Cylinder unit having stopping function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150154160A KR20170052120A (en) 2015-11-03 2015-11-03 Cylinder unit having stopping function

Publications (1)

Publication Number Publication Date
KR20170052120A true KR20170052120A (en) 2017-05-12

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Application Number Title Priority Date Filing Date
KR1020150154160A KR20170052120A (en) 2015-11-03 2015-11-03 Cylinder unit having stopping function

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107228149A (en) * 2017-06-04 2017-10-03 周满阳 Buffer unit and buffer unit array that liquid gas coexists
US20220097795A1 (en) * 2019-07-31 2022-03-31 Hitachi Astemo, Ltd. Shock absorber and saddle-type vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107228149A (en) * 2017-06-04 2017-10-03 周满阳 Buffer unit and buffer unit array that liquid gas coexists
US20220097795A1 (en) * 2019-07-31 2022-03-31 Hitachi Astemo, Ltd. Shock absorber and saddle-type vehicle
US12077242B2 (en) * 2019-07-31 2024-09-03 Hitachi Astemo, Ltd. Shock absorber and saddle-type vehicle

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