KR101839977B1 - Shock absorber component for railway car truck - Google Patents

Shock absorber component for railway car truck Download PDF

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Publication number
KR101839977B1
KR101839977B1 KR1020160032197A KR20160032197A KR101839977B1 KR 101839977 B1 KR101839977 B1 KR 101839977B1 KR 1020160032197 A KR1020160032197 A KR 1020160032197A KR 20160032197 A KR20160032197 A KR 20160032197A KR 101839977 B1 KR101839977 B1 KR 101839977B1
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KR
South Korea
Prior art keywords
valve disc
valve
disc
shock absorber
hollow
Prior art date
Application number
KR1020160032197A
Other languages
Korean (ko)
Other versions
KR20170108387A (en
Inventor
김남호
Original Assignee
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020160032197A priority Critical patent/KR101839977B1/en
Priority to US15/459,615 priority patent/US10233995B2/en
Priority to DE102017002566.5A priority patent/DE102017002566B4/en
Priority to CN201710160303.3A priority patent/CN107200035B/en
Publication of KR20170108387A publication Critical patent/KR20170108387A/en
Application granted granted Critical
Publication of KR101839977B1 publication Critical patent/KR101839977B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/12—Buffers with fluid springs or shock-absorbers; Combinations thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/18—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/09—Pistons; Trunk pistons; Plungers with means for guiding fluids

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A shock absorber for a railway vehicle having a piston valve structure for dividing the interior of a cylinder filled with a fluid into a compression chamber and a tension chamber, the piston valve comprising: A valve disc which is in close contact with the upper and lower portions of the main body to block the output of the main flow path and to open the outlet of the main flow path during compression and tensioning to generate a damping force; And eccentrically positioned eccentrically in a direction opposite to the initial open position of the valve disc to allow sequential opening along the edge of the valve disc from the initial open position of the valve disc during compression and tensioning.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a shock absorber for a railway vehicle,

The present invention relates to a shock absorber for a railway vehicle, and more particularly, to a shock absorber for a railway vehicle, and more particularly to a shock absorber for a railway vehicle, which comprises a valve disk having an eccentric disk disposed eccentrically on the back surface thereof, The present invention relates to a shock absorber for a railway vehicle capable of controlling a damping force in a low speed section and being capable of realizing a soft damping force.

Generally, a railroad car buffer is used to absorb impacts, such as a railroad car or a connecting mechanism between carriages.

The shock absorber for a railway vehicle includes a cylinder in which a working fluid is charged and one end of which is coupled to a railway vehicle, a piston valve for dividing the inside of the cylinder into a compression chamber and a tension chamber to generate a damping force, A piston rod for compression and tensioning, and the like.

The piston valve includes a body in which a main passage is formed by dividing the inside of the cylinder into a compression chamber and a tension chamber, and a valve disk coupled to the body in multiple layers to open and close the main passage.

That is, the conventional piston valve has a structure in which a damping force is generated in a process of moving a fluid, which is moved through a main flow path, during a compression stroke and a tension stroke, to a compression chamber or a tension chamber while pushing the valve disk.

However, the conventional piston valve is not capable of discontinuously discharging the fluid since the initial opening position of the valve disc is not specified during compression and tensioning strokes, which causes discontinuous blow off phenomenon when the valve disc is opened And there was a difficulty in realizing the damping force characteristic in the low speed section.

A prior art related to the present invention is Korean Patent Laid-Open No. 10-2011-0089078 (Aug. 04, 2011), which discloses a shock absorber.

It is an object of the present invention to provide a valve disc in which the eccentric disc is eccentrically positioned on the back surface of the valve disc and the supporting force with respect to the initial opening position of the valve disc is set relatively low, And the valve disc is continuously opened from the initial open position, so that there is no blow off phenomenon and a smooth damping force can be realized.

The shock absorber for a railway vehicle according to the present invention is a shock absorber for a railway vehicle having a piston valve structure for dividing the inside of a cylinder filled with a fluid into a compression chamber and a tension chamber, A valve disc which is in close contact with an upper portion and a lower portion of the main body so as to block the output of the main flow path and to open a discharge port of the main flow path during compression and tensioning to generate a damping force, And eccentric discs positioned eccentrically in a direction opposite to the initial opening position of the valve disc so as to open sequentially along the rim from the initial open position of the valve disc during compression and tensioning .

Preferably, the eccentric disc has one side thereof aligned with a rim portion of the valve disc, and the other side thereof is spaced apart from a rim of the valve disc to form the initial open position.

Preferably, the eccentric disk is formed with a smaller diameter than the valve disk.

A second hollow is formed at the center of the valve disc so that the second hollow is formed at a center of the eccentric disc and has a diameter larger than that of the first hollow. .

Since the eccentric disc is eccentrically positioned on the back surface of the valve disc and the supporting force of the valve disc relative to the initial opening position is set relatively low, the valve disc is continuously opened from the initial opening position of the valve disc during the stroke so that the damping force Since the valve disc is continuously opened from the initial open position, there is no blow off phenomenon and a smooth damping force can be realized.

1 is a cross-sectional view showing a shock absorber for a railway vehicle according to the present invention.
2 is a cross-sectional view showing the shape of an eccentric disc in a shock absorber for a railway vehicle according to the present invention.
3 is an operational state diagram showing a flow of a fluid during a compression stroke in a valve structure of a shock absorber according to the present invention.
4 is an operational state diagram for showing the flow of fluid during a tensile stroke in the valve structure of the shock absorber according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

FIG. 1 is a cross-sectional view showing a shock absorber for a railway vehicle according to the present invention, and FIG. 2 is a sectional view showing the shape of an eccentric disc in a shock absorber for a railway vehicle according to the present invention.

FIG. 3 is an operational state view showing a flow of fluid during a compression stroke in a buffer for a railway car according to the present invention. FIG. 4 is an operational state diagram showing a flow of fluid during a tension stroke in the buffer for a railway vehicle according to the present invention. to be.

1 to 4, a shock absorber for a railway vehicle according to the present invention includes a cylinder 10, a piston rod 20, and a piston valve 100.

First, the cylinder 10 may have a cylindrical shape that forms a space therein, and a fluid (oil, O) is filled in the cylinder 10.

The inside of the cylinder 10 is divided by the piston valve 100 into a compression chamber 11 on the lower side and a tension chamber 12 on the upper side.

One end of the piston rod 20 is coupled to the piston valve 100, which will be described later, and is reciprocated in the compression and tensile direction, and the opposite end is coupled to the vehicle.

The piston valve 100 is coupled to one end of a piston rod 20 inserted into the cylinder 10 to divide the inside of the cylinder 10 into a compression chamber 11 and a tension chamber 12.

The piston valve 100 for this purpose includes a body 110, a valve disc 120, and a non-eccentric disc 130.

First, the body 110 has a cylindrical shape corresponding to the inner diameter of the cylinder 10, and the side of the body 110 is moved in the compressing and tensile directions in tight contact with the inner peripheral surface of the cylinder 10.

Here, the side surface of the body 110 is moved in the compression or tensile direction in close contact with the inner circumferential surface of the cylinder 10.

A hollow may be formed at the center of the body 110 so that the piston rod 20 can be vertically penetrated.

The body 110 is formed with a main flow path 111 through which the fluid O moves in the direction of the compression chamber 11 and the tension chamber 12 during the compression stroke and the tension stroke.

The main passage 111 is divided into a compression side and a tension side, and an outlet side of the main passage 111 is closely supported by a valve disk 120 to be described later.

On the other hand, the inlet side of the main flow passage 111 is separated from the valve disc 120 to be described later, and communicates with the compression chamber 11 and the tension chamber 12.

The valve disc 120 is coupled to the upper and lower portions of the body 110 so as to be in close contact with the upper and lower portions of the body 110 to block the outflow of the main flow path 111, respectively.

Here, the valve disc 120 is formed with a first hollow 121 passing through the center thereof so as to be coupled with the piston rod 20, and the valve disc 120 preferably has a disc shape.

In addition, the edge of the valve disc 120 is closely attached to the lower end of the body 110 to block the outflow of the main flow path 111.

For example, in the case of compression and tensioning, the fluid O is pushed open at the rim of the valve disc 120.

At this time, the rim portion of the valve disc 120 is spaced away from the outflow side of the main flow path 111 during compression and tension stroke.

The eccentric disc 130 is coupled to the back surface of the valve disc 120 so that the eccentric disc 130 is eccentrically positioned in a direction opposite to the initial opening position A of the valve disc 120.

Here, the eccentric disc 130 may be formed as a circular ring using a metal material having a certain elasticity.

The eccentric disc 130 is formed with a second hollow 131 through which the piston rod 20 can be inserted.

The center of the eccentric disc 130 is positioned eccentrically from the center of the valve disc 120 as shown in FIG.

At this time, one side of the eccentric disc 130 coincides with a rim portion of the valve disc 120, and the other side of the eccentric disc 130 is spaced apart from a rim of the valve disc 120, .

The eccentric disc 130 is sequentially opened from the initial open position A of the valve disc 120.

2, the eccentric disc 130 is formed with a diameter smaller than that of the valve disc 120, and the second hollow 131 has a larger diameter than the first hollow 121 of the valve disc 120 As shown in FIG.

The outer diameter of the eccentric disc 130 is preferably smaller than the outer diameter of the valve disc 120 as shown in FIG.

Since the eccentric disc 130 is eccentrically positioned on one side of the valve disc 120, the bearing capacity of the valve disc 120 with respect to the initial open position A can be relatively small.

Therefore, since the valve disc 120 is continuously opened from the initial opening position A of the valve disc 120 during the compression and the tensile stroke, the valve disc 120 can be opened in a constant and smooth damping force.

One or more valve discs 140 may be further coupled to the back surface of the eccentric disc 130 and a retainer 150 may be coupled to the back surface of the valve disc 140.

A washer 160 may be coupled to the back surface of the retainer 150. The piston rod 20 is inserted through the hollow of the retainer 150 and the washer 160, The nut 170 may be coupled to the lower end of the housing 170 in a screwed manner.

As a result, the eccentric disc 130 can be eccentrically positioned on the back surface of the valve disc to set the bearing capacity of the valve disc 120 to the initial opening position A relatively low.

Thus, the present invention is continuously open from the initial open position A of the valve disc 120 during the stroke, so that the damping force of the low speed section can be controlled and the valve disc 120 is continuously opened So that a soft damping force can be realized without a blow off phenomenon.

Although the concrete embodiments of the shock absorber for a railway vehicle according to the present invention have been described so far, it is apparent that various modifications can be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

10: cylinder 11: compression chamber
12: tension chamber 20: piston rod
100: Piston valve 110: Body
111: Main flow path 120: Valve disk
121: first hollow 130: eccentric disk
131: Second hollow 140: Valve disk
150: retainer 160: washer
170: Nut A: Initial opening position
O: fluid

Claims (4)

And a piston valve structure that divides the inside of the cylinder filled with the fluid into a compression chamber and a tension chamber, wherein the piston valve comprises: a body having a main flow path formed therein for moving fluid during compression and tensioning; A valve disc which is in close contact with an upper portion and a lower portion of the body to block the output of the main flow path and to open a discharge side of the main flow path during compression and tension stroke to generate a damping force; Eccentrically located in a direction opposite to an initial opening position of the valve disc and being opened sequentially along a rim from an initial opening position of the valve disc during compression and tensioning,
Wherein the eccentric disc has one side thereof coinciding with a rim portion of the valve disc and the other opposite side thereof being spaced apart from a rim portion of the valve disc to form the initial open position,
Wherein a first hollow is formed in the center of the valve disc and a second hollow is formed in the center of the eccentric disc to have a larger diameter than the first hollow and eccentrically positioned on one side of the first hollow Wherein the shock absorber is mounted on a railway vehicle. delete The method according to claim 1,
The outer diameter of the eccentric disk
Wherein the diameter of the valve disc is smaller than the diameter of the valve disc. delete
KR1020160032197A 2016-03-17 2016-03-17 Shock absorber component for railway car truck KR101839977B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020160032197A KR101839977B1 (en) 2016-03-17 2016-03-17 Shock absorber component for railway car truck
US15/459,615 US10233995B2 (en) 2016-03-17 2017-03-15 Shock absorber for railway vehicle
DE102017002566.5A DE102017002566B4 (en) 2016-03-17 2017-03-16 VIBRATION DAMPER FOR A RAILWAY VEHICLE
CN201710160303.3A CN107200035B (en) 2016-03-17 2017-03-17 Shock absorber for railway vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160032197A KR101839977B1 (en) 2016-03-17 2016-03-17 Shock absorber component for railway car truck

Publications (2)

Publication Number Publication Date
KR20170108387A KR20170108387A (en) 2017-09-27
KR101839977B1 true KR101839977B1 (en) 2018-03-19

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KR1020160032197A KR101839977B1 (en) 2016-03-17 2016-03-17 Shock absorber component for railway car truck

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011058562A (en) * 2009-09-10 2011-03-24 Kyb Co Ltd Valve structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011058562A (en) * 2009-09-10 2011-03-24 Kyb Co Ltd Valve structure

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