US20150152624A1 - Swing device of evacuator having anti-sliding device - Google Patents

Swing device of evacuator having anti-sliding device Download PDF

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Publication number
US20150152624A1
US20150152624A1 US14/364,289 US201314364289A US2015152624A1 US 20150152624 A1 US20150152624 A1 US 20150152624A1 US 201314364289 A US201314364289 A US 201314364289A US 2015152624 A1 US2015152624 A1 US 2015152624A1
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United States
Prior art keywords
channel
brake
spring compartment
excavator
delay
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US14/364,289
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English (en)
Inventor
Kyung Chul Shin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HD Hyundai Heavy Industries Co Ltd
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Hyundai Heavy Industries Co Ltd
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 Hyundai Heavy Industries Co Ltd filed Critical Hyundai Heavy Industries Co Ltd
Assigned to HYUNDAI HEAVY INDUSTRIES CO., LTD. reassignment HYUNDAI HEAVY INDUSTRIES CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHIN, KYUNG CHUL
Publication of US20150152624A1 publication Critical patent/US20150152624A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/128—Braking systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/26—Indicating devices
    • E02F9/264—Sensors and their calibration for indicating the position of the work tool
    • E02F9/265—Sensors and their calibration for indicating the position of the work tool with follow-up actions (e.g. control signals sent to actuate the work tool)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/06—Hill holder; Start aid systems on inclined road
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/202—Mechanical transmission, e.g. clutches, gears

Definitions

  • the present disclosure relates to a swing device of an excavator having an anti-sliding device, and more particularly, to a swing device of an excavator having an anti-sliding device which, when a brake releasing signal is applied in a state where an excavator is located on a slope, prevents a hydraulic pressure at a spring of a brake piston to discharge so that a moving speed of the brake piston is lowered and thus the braking is smoothly released, thereby preventing the braking from being instantly released.
  • An excavator basically includes a lower frame to which a driving device is mounted and an upper frame to which a working device is mounted.
  • the lower frame and the upper frame are connected to a swing device which may rotate a full 360 degrees, and the upper frame is also rotatable due to the rotation of the swing device (Korean Utility Model Registration No. 20-0168768).
  • the swing device has a swing motor and operates or stops turning according to the operation of the swing motor.
  • a circuit configuration of an existing swing device of an excavator is shown in FIG. 1 .
  • the existing swing device includes a swing motor for driving a reducer, a brake piston and a friction plate for braking the swing motor, a select valve and a brake hydraulic port for selectively supplying a hydraulic pressure to the brake piston, or the like.
  • the braking operation and brake-releasing operation of the existing swing device are as follows. If a brake releasing signal is applied, a brake hydraulic port (PG) is opened by the select valve to apply a hydraulic pressure to the brake piston, and the hydraulic pressure pushes a spring to release the brake. On the contrary, if a braking signal (SH) is applied, the brake hydraulic port is blocked, and the hydraulic pressure applied to the brake piston is discharged. Accordingly, the piston moves to the left by the spring so that the swing motor is braked by the friction plate.
  • PG brake hydraulic port
  • SH braking signal
  • the existing swing device configured as above instantly releases the brake by a hydraulic pressure supplied to the brake piston. Accordingly, if the brake is released in a state where an excavator is on a slope, the upper portion of the excavator may be pushed by the weight of the upper frame or any other weight, which increase the danger of an accident.
  • the present disclosure is directed to providing a swing device of an excavator having an anti-sliding device which, when a brake releasing signal is applied in a state where an excavator is located on a slope, prevents a hydraulic pressure at a spring of a brake piston to discharge so that a moving speed of the brake piston is lowered and thus the braking is smoothly released, thereby preventing the braking from being instantly released.
  • the present disclosure provides a swing device of an excavator having an anti-sliding device, which includes: a brake channel connected to a hydraulic chamber of a brake piston; a select valve for connecting the brake channel to a brake hydraulic port or a delay channel; a spring compartment channel having one side connected to a spring compartment of the brake piston and the other side connected to one point of the delay channel; a check valve provided at the spring compartment channel to allow a hydraulic pressure to be supplied only in a direction from the delay channel toward the spring compartment; a spring compartment bypass channel for connecting one point of the spring compartment channel between the spring compartment and the check valve and one point of the spring compartment channel between the check valve and the delay channel; an anti-sliding valve provided at the spring compartment bypass channel to block or open the spring compartment bypass channel; a slope detection sensor provided at one side of the excavator to sense a slope; and an anti-sliding valve controller for blocking the anti-sliding valve when the excavator located on a slope and opening the anti-sliding valve
  • the brake channel When the brake is released in a state where the excavator is located on a slope, the brake channel may be connected to the delay channel so that a hydraulic pressure of the hydraulic chamber of the brake piston is discharged to the delay channel, the spring compartment bypass channel may be blocked to prevent a hydraulic pressure from being discharged at the spring compartment, and a travel time of the brake piston in a brake releasing direction may be delayed.
  • the present disclosure provides a swing device of an excavator having an anti-sliding device, which includes: a brake channel connected to a hydraulic chamber of a brake piston; a select valve for connecting the brake channel to a brake hydraulic port or a delay channel; a spring compartment channel having one side connected to a spring compartment of the brake piston and the other side connected to one point of the delay channel; a check valve provided at the spring compartment channel to allow a hydraulic pressure to be supplied only in a direction from the delay channel toward the spring compartment; a spring compartment bypass channel for connecting one point of the spring compartment channel between the spring compartment and the check valve and one point of the spring compartment channel between the check valve and the delay channel; and an orifice provided on the spring compartment bypass channel to lower a discharge speed of the hydraulic pressure supplied from the spring compartment to the delay channel when the brake is released.
  • the brake channel When the brake of the excavator is released, the brake channel may be blocked from the delay channel so that a pressure is supplied to the hydraulic chamber and the brake piston is to move in a direction of releasing the brake, and the discharge speed of the hydraulic pressure at the spring compartment may be lowered by the orifice so that a travel time of the brake piston in a brake releasing direction is delayed.
  • FIG. 1 is a circuit diagram showing an existing swing device of an excavator.
  • FIG. 2 is a circuit diagram showing a swing device of an excavator having an anti-sliding device according to an embodiment of the present disclosure.
  • FIG. 3 is a reference view showing a brake releasing operation when an excavator is located on a slope.
  • This specification proposes a technique for preventing an excavator from being pushed by its weight or any other weights due to instant brake release, by restraining or delaying the discharge of a hydraulic pressure at a spring compartment of a brake piston so that the brake is smoothly released, when the brake is released in a state where the excavator is located on a slope.
  • the swing device of an excavator having an anti-sliding device includes a swing motor 210 for driving a reducer, a brake piston 220 and a friction plate for selectively braking the swing motor 210 , a brake hydraulic port (PG) for supplying a hydraulic pressure to a hydraulic chamber 221 of the brake piston 220 , and a select valve 230 for selectively connecting the brake hydraulic chamber 221 to the brake hydraulic port.
  • a swing motor 210 for driving a reducer
  • a brake piston 220 and a friction plate for selectively braking the swing motor 210
  • PG brake hydraulic port
  • select valve 230 for selectively connecting the brake hydraulic chamber 221 to the brake hydraulic port.
  • the swing motor 210 performs a braking process and a brake releasing process at a place other than a slope according to the following procedure.
  • braking the connection between the hydraulic chamber 221 of the brake piston 220 and the brake hydraulic port is blocked, so that a hydraulic pressure in the hydraulic chamber 221 of the brake piston 220 is discharged and also a hydraulic pressure is supplied to the spring compartment 222 of the brake piston 220 . Accordingly, the friction plate is moved to the left by a spring force of the brake piston 220 , thereby braking the swing motor 210 .
  • brake releasing the hydraulic chamber 221 of the brake piston 220 is connected to the brake hydraulic port by the select valve 230 .
  • a hydraulic pressure is supplied to the hydraulic chamber 221 of the brake piston 220 and also a hydraulic pressure in the spring compartment 222 is discharged.
  • the hydraulic pressure supplied to the hydraulic chamber 221 moves the brake piston 220 and the friction plate to the right, thereby releasing the brake.
  • a channel between the hydraulic chamber 221 of the brake piston 220 and the select valve 230 is called a brake channel, and a channel between the select valve 230 and the swing motor 210 is called a delay channel, for convenience.
  • the brake channel is connected to the brake hydraulic port or the delay channel by the select valve 230 .
  • a time delay valve 240 is provided at the delay channel to prevent a hydraulic pressure from being abruptly discharged from the hydraulic chamber 221 of the brake piston 220 during a braking process.
  • the discharge of the hydraulic pressure in the spring compartment 222 of the brake piston 220 is prevented or delayed, and thus even though the hydraulic pressure is applied to the hydraulic chamber 221 of the brake piston 220 , the speed of the spring 223 pushed to the right by the hydraulic pressure in the spring compartment 222 is lowered so that the brake releasing speed is delayed.
  • a hydraulic pressure remains in the spring compartment 222 so that the speed of the spring 223 pushed to the right is delayed by the hydraulic pressure of the hydraulic chamber 221 .
  • the swing device of an excavator according to this embodiment further includes an anti-sliding device.
  • the anti-sliding device includes an anti-sliding valve 260 , an anti-sliding valve controller 270 and a slope detection sensor 280 .
  • the anti-sliding valve 260 selectively opens or blocks the spring compartment bypass channel 204 .
  • a check valve 250 is provided at a channel which connects the spring compartment 222 of the brake piston 220 to the delay channel, namely the spring compartment channel 203 .
  • the check valve 250 allows a hydraulic pressure to be supplied only in a direction from the delay channel toward the spring compartment 222 of the brake piston 220 and prevents a hydraulic pressure from being supplied in an opposite direction.
  • the spring compartment bypass channel 204 is a channel which connects one point of the spring compartment channel 203 at an upper portion of the check valve 250 and one point of the spring compartment channel 203 at a lower portion of the check valve 250 .
  • the hydraulic pressure is supplied to the spring compartment 222 of the brake piston 220 through the spring compartment channel 203 , and the hydraulic pressure is discharged at the spring compartment 222 through the spring compartment bypass channel 204 .
  • the anti-sliding valve 260 In case of brake releasing in a state where the excavator is located at a place other than a slope, the anti-sliding valve 260 is in an opened state, and the hydraulic pressure of the spring compartment 222 is discharged through the spring compartment bypass channel 204 . Meanwhile, in case of brake releasing in a state where the excavator is located on a slope, the anti-sliding valve 260 is blocked, and accordingly the spring compartment bypass channel 204 is also blocked, namely in a kind of a closed loop state. By doing so, the discharge of hydraulic pressure from the spring compartment 222 is prevented (see FIG. 3 ).
  • the anti-sliding valve controller 270 blocks or opens the anti-sliding valve 260 based on slope information sent from the slope detection sensor 280 . In case of a slope, the anti-sliding valve 260 is blocked by the anti-sliding valve controller 270 , but in case of a place other than a slope, the anti-sliding valve 260 is opened.
  • the slope detection sensor 280 is provided at one side of the excavator to sense a slope over a certain angle and may employ, for example, a gyro sensor.
  • the anti-sliding device has been illustrated as including the anti-sliding valve 260 , the anti-sliding valve controller 270 and the slope detection sensor 280 , but the anti-sliding device may also be configured by combining the spring compartment bypass channel 204 with an orifice.
  • the spring compartment bypass channel 204 is a channel which connects the spring compartment 222 of the brake piston 220 to the delay channel as described above, and the orifice is provided on the spring compartment bypass channel 204 to lower a discharge speed of the hydraulic pressure discharged from the spring compartment 222 to the delay channel when the brake is released.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Braking Arrangements (AREA)
US14/364,289 2013-05-06 2013-11-11 Swing device of evacuator having anti-sliding device Abandoned US20150152624A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2013-0050626 2013-05-06
KR1020130050626A KR101471288B1 (ko) 2013-05-06 2013-05-06 선회밀림방지장치를 구비한 굴삭기 선회장치
PCT/KR2013/010169 WO2014181940A1 (ko) 2013-05-06 2013-11-11 선회밀림방지장치를 구비한 굴삭기 선회장치

Publications (1)

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US20150152624A1 true US20150152624A1 (en) 2015-06-04

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Application Number Title Priority Date Filing Date
US14/364,289 Abandoned US20150152624A1 (en) 2013-05-06 2013-11-11 Swing device of evacuator having anti-sliding device

Country Status (8)

Country Link
US (1) US20150152624A1 (https=)
EP (1) EP2837744A4 (https=)
KR (1) KR101471288B1 (https=)
CN (1) CN104321490B (https=)
BR (1) BR112014018958A8 (https=)
IN (1) IN2014MN01139A (https=)
RU (1) RU2014121791A (https=)
WO (1) WO2014181940A1 (https=)

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KR20140131711A (ko) 2014-11-14
CN104321490B (zh) 2016-05-11
KR101471288B1 (ko) 2014-12-09
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EP2837744A4 (en) 2016-01-13
WO2014181940A1 (ko) 2014-11-13

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