EP3789540A1 - Machine - Google Patents

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Publication number
EP3789540A1
EP3789540A1 EP19195748.9A EP19195748A EP3789540A1 EP 3789540 A1 EP3789540 A1 EP 3789540A1 EP 19195748 A EP19195748 A EP 19195748A EP 3789540 A1 EP3789540 A1 EP 3789540A1
Authority
EP
European Patent Office
Prior art keywords
machine
line
locking
tool
hydraulic
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.)
Withdrawn
Application number
EP19195748.9A
Other languages
German (de)
English (en)
Inventor
Karl Mauch
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP19195748.9A priority Critical patent/EP3789540A1/fr
Publication of EP3789540A1 publication Critical patent/EP3789540A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3654—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with energy coupler, e.g. coupler for hydraulic or electric lines, to provide energy to drive(s) mounted on the tool
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/365—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with redundant latching means, e.g. for safety purposes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated
    • 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

Definitions

  • the invention relates to a machine for actuating a tool, the machine having a hydraulic system with a first supply line for connection by means of a first coupling to a first hydraulic line of the tool, which first hydraulic line conveys actuation of the tool when pressurized, and a movably mounted in a locking cylinder Comprises locking bolt for securing the tool on the machine, wherein the locking bolt can be moved into a locking position by applying pressure to a locking line and into a release position by applying pressure to an unlocking line.
  • the invention further relates to a system comprising a machine according to the invention and a tool that can be actuated by the machine.
  • the invention is based on known machines that are coupled to a separate tool and can operate this hydraulically. These can be wheel loaders or tractors that can be coupled with a plow, an excavator shovel or a pair of tongs.
  • check valves are usually used, which open or close the machine.
  • Shut off the unlocking lines of the locking cylinder in particular leaks in the locking cylinder itself, in the locking line of the locking cylinder, in a shut-off valve and / or in the hydraulic system of the machine responsible for actuating the locking cylinder can lead to the locking bolt escaping from the safety position during operation of the machine and releasing the tool .
  • a system pressure prevailing in the hydraulic circuit can also act on the locking bolt, which can lead to a loosening of the locking bolt from the safety position.
  • This task is achieved in a machine for actuating a tool, the machine having a hydraulic system with a first supply line for connection by means of a first coupling to a first hydraulic line of the tool, which first hydraulic line conveys actuation of the tool when pressurized, and a movable one in a locking cylinder comprises stored locking bolt for securing the tool on the machine, wherein the locking bolt can be moved into a locking position by pressurizing a locking line and into a release position by pressurizing an unlocking line, released by the locking line being connected to the first supply line.
  • the hydraulic actuation of the locking line of the locking cylinder is not carried out by a separate hydraulic system, but by the same hydraulic system of the machine that also mediates the actuation of the tool.
  • This measure reliably prevents the tool from being inadvertently released from the machine during operation, since each time the tool is actuated - which is conveyed by pressurizing the first supply line - pressure is also applied to the locking line, which means that the locking bolt in Moved towards the locking position or held in the locking position.
  • Leakages in the locking cylinder itself or in the locking line of the locking cylinder, which in the prior art would lead to a loosening of the locking bolt are thus compensated for each time the tool is actuated by hydraulic fluid from the first supply line. It is also no longer necessary to shut off the locking line by means of a shut-off valve in order to keep the locking bolt in its secured position during operation of the machine, which leads to a further simplification of the hydraulic system of the machine.
  • the hydraulic system comprises a second supply line for connection by means of a second coupling to a second hydraulic line of the tool, which second hydraulic line also mediates an actuation of the tool when pressure is applied - namely in another Direction than by pressurizing the first supply line.
  • the unlocking line is connected to the second supply line and the machine comprises a shut-off valve which is at least set up to shut off and release the unlocking line.
  • both the locking line and the unlocking line of the locking cylinder can be hydraulically supplied by the hydraulic system of the tool.
  • an independent hydraulic supply of the locking cylinder can be completely dispensed with, since the actuation of the locking cylinder is also taken over by the hydraulic system which mediates the actuation of the tool.
  • the second supply line is pressurized, pressure is applied to the unlocking line as well, provided the check valve releases the unlocking line, which means that the locking bolt is moved in the direction of the release position or is held in the release position. In this way, the tool can be deliberately secured by releasing the locking valve to release the unlocking line and actuating the second feed line.
  • the unlocking line must not be subjected to pressure, as this could move the locking bolt out of the secured position; therefore the shut-off valve is closed during operation of the machine.
  • the second supply line via the second coupling with the second hydraulic line of the Tool is connected, come through the prevailing pressure in the system "machine plus tool" to a counter pressure on the locking bolt.
  • the check valve prevents a corresponding counterpressure from being transmitted to the locking bolt via the unlocking line; but even if this shut-off valve should become permeable in the direction of the locking cylinder due to an error during the operation of the machine, the connection according to the invention between the first supply line and locking line ensures that this counter pressure does not lead to an unintentional release of the tool, since every time the first supply line is pressurized - So with each actuation of the tool in the "first direction" - a corresponding force acts on the locking bolt in the direction of the locking position.
  • the first supply line and / or the second supply line and / or the locking line and / or the unlocking line are preferably designed to be flexible in order to be able to receive the hydraulic fluid pushed out of the locking cylinder even during the locking and unlocking process when the Machine already have high pressures.
  • the shut-off valve is arranged along the unlocking line and designed as a 2/2-way valve, the unlocking line being shut off in a basic position of the 2/2-way valve and when the 2/2 -Way valve is released.
  • the 2/2-way valve is preloaded into the basic position by means of spring force.
  • the 2/2-way valve If the 2/2-way valve is in the basic position during operation of the machine, pressurization of the second supply line leads to actuation of the tool; it works but no force whatsoever on the locking bolt, since the unlocking line is blocked and thus a transmission of forces between the second supply line and the locking cylinder is not possible.
  • the locking bolt When the 2/2-way valve is actuated, the locking bolt can be moved into the release position by applying pressure to the second supply line (unlocking process); In addition, hydraulic fluid can escape from the locking cylinder during the locking process and be fed back into a hydraulic drive of the hydraulic system via the actuated shut-off valve.
  • connection between the second supply line and the second coupling in this embodiment is interrupted during the locking process, the second coupling cannot be subjected to pressure during locking.
  • the hydraulic fluid forced out of the locking cylinder by the locking bolt moving into the locking position can thus escape from the locking cylinder without applying pressure to the second clutch.
  • a load on the first clutch can occur during the unlocking process, since the first supply line is connected to the locking line and the hydraulic fluid displaced from the locking cylinder by the locking bolt moving into the release position thus leads to pressurization of the first clutch
  • a further shut-off valve is provided, the connection between the first supply line and the first coupling being interrupted when the further shut-off valve is actuated.
  • shut-off valve and / or the further shut-off valve is preferably preloaded into the basic position by means of spring force in order to release the first feed line and / or the second feed line during operation of the machine.
  • the first coupling is arranged in a locking connector of the machine connected to the locking cylinder and opposite the locking bolt.
  • the locking stub can interact with the locking bolt in order to secure the tool on the machine; For example, by bringing the locking connector into engagement with a first receptacle of the tool and then transferring the locking bolt into the securing position in which the locking bolt is positively engaged with another receptacle of the tool, so that the tool is secured to the machine.
  • the first receptacle is preferably a connection of the first hydraulic line of the tool. By securing the tool on the machine, in such embodiments, the connection between the first supply line and the first hydraulic line is also established at the same time.
  • the first coupling can, however, also be arranged in a further locking bolt which can be actuated by a locking cylinder.
  • the second coupling is arranged in the locking bolt.
  • the second receptacle, into which the locking bolt can protrude in its securing position, is preferably a connection of the second hydraulic line of the tool.
  • the connection between the second supply line and the second hydraulic line is also established at the same time in such embodiments.
  • Embodiments of the machine according to the invention are particularly preferred in which the first coupling is arranged in the locking connector and the second coupling is arranged in the locking bolt, and the first receptacle through the connection of the first hydraulic line of the tool and the second receptacle through the connection of the second hydraulic line of the tool is formed.
  • the hydraulic supply of the tool is established at the same time as the tool is secured to the machine according to the invention.
  • the locking cylinder is designed as a double-acting cylinder, preferably as a differential cylinder.
  • a first active direction of movement of the locking cylinder can be the direction "from the release position to the locking position" of the locking bolt; in order to move the locking bolt in this direction, the locking line of the locking cylinder can be pressurized in order to force hydraulic fluid into a first receiving volume of the locking cylinder which is delimited by a first piston surface.
  • a second active direction of movement of the locking cylinder can be the direction "from the locking position to the release position" of the locking bolt; in order to move the locking bolt in this direction, the unlocking line of the locking cylinder can be pressurized in order to force hydraulic fluid into a second receiving volume of the locking cylinder which is delimited by a second piston surface.
  • the locking bolt can attach to the second piston surface or be connected to it.
  • connection between the first supply line and the locking line can be established in a particularly simple manner by means of a T-piece.
  • the locking line is connected to the first supply line by means of a T-piece.
  • the unlocking line can be connected to the second supply line by means of a further T-piece.
  • a system comprising a machine according to the invention and a tool that can be actuated by the machine, the first hydraulic line and / or the second hydraulic line of the tool preferably being flexible.
  • the hydraulic fluid pushed out of the locking cylinder during the locking and unlocking process can be absorbed particularly well in the system "hydraulic system of the machine plus hydraulic system of the tool" without the hydraulic lines of the tool or to excessively load the supply lines of the machine.
  • the machine can preferably be designed as a wheel loader or tractor and / or the tool as a plow, an excavator shovel or a pair of tongs.
  • Fig. 1 shows the hydraulic circuit diagram of a first exemplary embodiment of the machine 1 according to the invention, which machine 1 is connected to a tool 2.
  • the machine 1 has a hydraulic system 3 which, among other things, also serves to actuate the working cylinder 3c.
  • a hydraulic drive 3c known per se, which hydraulically supplies a first hydraulic circuit for actuating two lifting cylinders 1a of the machine 1 and a second hydraulic circuit for actuating a tilting cylinder 1b of the machine 1
  • a 4/3-way valve that can be controlled, for example by means of a working lever, can be selected a first feed line 3a of the hydraulic system 3 or a second feed line 3b of the hydraulic system 3 can be pressurized.
  • the machine 1 comprises a locking cylinder 4 in which a locking bolt 5 is movably mounted ( Fig. 2 and 5 ).
  • a locking bolt 5 By applying pressure to a locking line 4a of the locking cylinder 4, the locking bolt 5 can be moved into a securing position, which securing position the locking bolt in detail A of Fig. 1 occupies.
  • the locking bolt 5 In the securing position, the locking bolt 5 is in engagement with the tool 2 in such a way that the tool 2 is secured on the machine 1.
  • Fig. 2 shows detail A. Fig. 1 , whereby the locking bolt 5 - unlike in Fig. 1 - is in the release position.
  • the locking bolt 5 of the machine 1 can be brought into engagement with a corresponding receptacle of the tool 2.
  • a securing can be achieved, for example, by bringing the locking connector 5 'into engagement with a first receptacle 2d of the tool 2 and then transferring the locking bolt 5 into the securing position, in which securing position the locking bolt 5 with a further receptacle 2e of the tool 2 in Is engaged so that the tool 2 is secured on the machine 1.
  • the first supply line 3a is pressurized.
  • the first supply line 3a for example via a T-piece 7, is connected to the locking line 4a of the locking cylinder 4 (namely fluidically connected), so that when the first supply line 3a is pressurized, hydraulic fluid flows via the locking line 4a into a first piston surface 8a Receiving volume 8 of the locking cylinder 4 is initiated.
  • the force acting on the first piston surface 8a finally forces the locking bolt 5 into the securing position in which the locking bolt 5 secures the tool 2 on the machine 1 ( Fig. 1 ).
  • the unlocking line 4b of the locking cylinder 4 can be subjected to pressure. This can be done either via a separate hydraulic supply to the unlocking line 4b, or by connecting the unlocking line 4b to a hydraulic line of the machine 1 that mediates the actuation of the tool 2, in the specific case with the second supply line 3b, as in FIG Fig. 1 and 2 the case.
  • the connection between the second supply line 3b and unlocking line 4b can for example be mediated by a further T-piece 7 'and basically has the advantage that the locking cylinder 4 can be supplied completely by the hydraulic system 3 of the machine 1, which is used to actuate the tool 2 ; an additional hydraulic system for supplying the locking cylinder 4 can thus be omitted.
  • the machine 1 comprises a shut-off valve 6, which is at least set up to shut off the unlocking line 4b, namely during operation of the machine 1, or to release it, namely during the unlocking and locking process.
  • the second supply line 3b can be pressurized. While the shut-off valve 6 shuts off the unlocking line 4b during operation of the machine 1 ( Fig. 1 ), for unlocking it is necessary that the shut-off valve 6 releases the unlocking line 4b ( Fig. 2 ).
  • the pressurization of the second supply line 3b then leads to hydraulic fluid being introduced via the shut-off valve 6 into a second receiving volume 9 of the locking cylinder 4, which second receiving volume 9 is delimited by a second piston surface 9a.
  • the force acting on the second piston surface 9a moves the locking bolt 5 into the release position, which the locking bolt 5 in Fig. 2 occupies.
  • shut-off valve 6 must also release the unlocking line 4b connected to the second supply line 3b in order to allow hydraulic fluid to escape from the second receiving volume 9 of the locking cylinder 4.
  • the first receptacle 2d is preferably a connection of the first hydraulic line 2a of the tool 2 and the further receptacle 2e is a connection of the second hydraulic line 2b of the tool 2. If the first coupling 5a is in a tool-side end section of the locking connector 5 'and the second coupling 5b are arranged in a tool-side end section of the locking bolt 5, by securing the tool 2 on the machine 1 by means of the locking connector 5 'and the locking bolt 5, the fluidic connection between the first supply line 3a and the first hydraulic line 2a or the second Supply line 3b and the second hydraulic line 2b made. A separate work step for establishing the hydraulic connection of the hydraulic systems of the tool 2 and the machine 1 can thus be omitted.
  • the invention also offers the advantage that any (fault-related) permeability of the shut-off valve 6 in the direction of the locking cylinder 4 during operation cannot lead to an unintentional detachment of the tool 1 from the machine 1.
  • hydraulic fluid can get into the second receiving volume 9 if the second feed line 3b is pressurized for the purpose of actuating the tool 2; however, a force resulting therefrom on the second piston surface 9a is immediately counteracted again, namely already when the first feed line 3a is pressurized for the purpose of actuating the tool 2 and hydraulic fluid is subsequently fed into the first receiving volume 8 becomes. If the machine 1 is operated as intended, this will be the case regularly and at short time intervals.
  • connection according to the invention between the first supply line 3a and the locking line 4a prevents leaks in the working cylinder 2c of the tool 2, the first hydraulic line 2a, the first supply line 3a including the first coupling 5a, the locking line 4a, and / or the locking cylinder 4, which leaks can arise from the counterpressure on the locking bolt 5 due to the coupling force to be overcome and the counterforce from the closed hydraulic connection, or leaks in the check valve 6 to loosen the locking bolt 5 and, in the worst case, to an escape of the locking bolt 5 from the locking position during the operation of the machine 1 can lead.
  • the shut-off valve 6 of the first embodiment is designed as a 2/2-way valve which is closed in its basic position and permeable in both directions in its actuating position.
  • a disadvantage of the in Fig. 1 and 2 The illustrated embodiment consists in the fact that during the locking process a considerable load occurs on the second clutch 5b because the hydraulic fluid flowing out of the second receiving volume 9 presses on the second clutch 5b for as long as there is no connection between the second clutch 5b and the connection of the second hydraulic line 2b of the tool 2 until the locking bolt 5 has reached its securing position and the connection between the second coupling 5b and the connection of the second hydraulic line 2b is established.
  • the check valve 6 of the in the Fig. 3 and 4th is designed as a 3/2-way valve, whereby in the basic position of the 3/2-way valve, the second supply line 3b is released, but the unlocking line 4b is blocked, and when the 3/2-way valve is actuated, the unlocking line 4b is released, but a connection between the second supply line 3b and the second coupling 5b is interrupted.
  • the shut-off valve 6 of this exemplary embodiment is in its actuating position ( Fig. 4 )
  • a pressurization of the second clutch 5b by the hydraulic fluid escaping from the second receiving volume 9 is therefore not possible.
  • the shut-off valve 6 can replace the further T-piece 7 'of the first exemplary embodiment.
  • the T-piece 7 connecting the first supply line 3a and the locking line 4a can also be replaced by a corresponding 3/2-way valve which upon actuation - that is, during the unlocking process - interrupts the connection between the first supply line 3a and the first coupling 5a.
  • Fig. 5 shows an embodiment of the locking cylinder 4 of the machine 1 according to the invention, wherein the locking bolt 5 is not in its securing position and the locking connector 5 'is also not in engagement with the first receptacle 2d of the tool 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
EP19195748.9A 2019-09-05 2019-09-05 Machine Withdrawn EP3789540A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19195748.9A EP3789540A1 (fr) 2019-09-05 2019-09-05 Machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19195748.9A EP3789540A1 (fr) 2019-09-05 2019-09-05 Machine

Publications (1)

Publication Number Publication Date
EP3789540A1 true EP3789540A1 (fr) 2021-03-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19195748.9A Withdrawn EP3789540A1 (fr) 2019-09-05 2019-09-05 Machine

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EP (1) EP3789540A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2640840A1 (de) * 1975-09-12 1977-04-07 Renholmens Mek Verkstad Ab Automatische schnellkupplungsvorrichtung
AT2322U2 (de) * 1998-05-19 1998-08-25 Baumaschinentechnik Ges M B H Schnellwechselvorrichtung für bagger mit verriegelungssicherung
EP1329559A2 (fr) * 2002-01-08 2003-07-23 Thomas Sauer Dispositif d'attache rapide pour engins de travail
WO2011019312A1 (fr) * 2009-08-11 2011-02-17 Oilquick Ab Porte-outil doté d’une fonction de verrouillage à commande hydraulique
WO2019110122A1 (fr) * 2017-12-08 2019-06-13 Volvo Construction Equipment Ab Dispositif de fixation d'outil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2640840A1 (de) * 1975-09-12 1977-04-07 Renholmens Mek Verkstad Ab Automatische schnellkupplungsvorrichtung
AT2322U2 (de) * 1998-05-19 1998-08-25 Baumaschinentechnik Ges M B H Schnellwechselvorrichtung für bagger mit verriegelungssicherung
EP1329559A2 (fr) * 2002-01-08 2003-07-23 Thomas Sauer Dispositif d'attache rapide pour engins de travail
WO2011019312A1 (fr) * 2009-08-11 2011-02-17 Oilquick Ab Porte-outil doté d’une fonction de verrouillage à commande hydraulique
WO2019110122A1 (fr) * 2017-12-08 2019-06-13 Volvo Construction Equipment Ab Dispositif de fixation d'outil

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