EP4335976A1 - Werkzeugmaschine mit schnellkupplung - Google Patents

Werkzeugmaschine mit schnellkupplung Download PDF

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Publication number
EP4335976A1
EP4335976A1 EP23196078.2A EP23196078A EP4335976A1 EP 4335976 A1 EP4335976 A1 EP 4335976A1 EP 23196078 A EP23196078 A EP 23196078A EP 4335976 A1 EP4335976 A1 EP 4335976A1
Authority
EP
European Patent Office
Prior art keywords
coupling
lifting arm
tube
pin
present
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.)
Pending
Application number
EP23196078.2A
Other languages
English (en)
French (fr)
Inventor
Jan Willem Josef Overbeek
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
Publication of EP4335976A1 publication Critical patent/EP4335976A1/de
Pending 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
    • E02F3/3636—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using two or four movable transversal pins
    • 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

Definitions

  • the invention relates to a mobile machine tool comprising:
  • Various tools can be hung in the lifting arm, such as a closed bucket, rubble bucket, pallet forks, stone clamp, lifting mast, stone rotator, sweeping broom, manure fork with top clamp, but also augers, mowers and feed dosing containers. Due to the possibility of connecting many different tools to the machine tool, the machine tool is suitable for many different applications.
  • Such a machine tool is generally known in the form of a shovel provided with a quick coupling of which the mechanical and hydraulic coupling means form part and with which a tool can be quickly connected to or disconnected from the lifting arm. If the tool is not correctly mechanically connected to the lifting arm, the hydraulic coupling cannot be performed properly and there is a risk of damage to the hydraulic couplings.
  • the hydraulic coupling can only take place if the tool is mechanically coupled to the lifting arm in a correct manner. If a correct mechanical coupling has not taken place, the hydraulic coupling can be damaged when activated.
  • An object of the invention is to provide a machine tool of the type described in the opening paragraph in which the hydraulic coupling means are damaged less quickly and therefore need to be repaired less often and which does not require major adjustments to existing tools.
  • the machine tool according to the invention is characterized in that it furthermore comprises:
  • the second moving means for coupling the hydraulic coupling pieces together can only be activated if the coupling pin protrudes through the coupling eye, it is ensured that the hydraulic coupling only takes place in case the mechanical coupling has been carried out correctly. This greatly reduces the chance of the hydraulic couplings being damaged during coupling.
  • An important further advantage of the machine tool according to the invention is that it can cooperate with existing tools that are not provided with hydraulics without these existing tools having to be adapted.
  • Existing tools are not equipped with switches, which means that the hydraulic coupling means on the lifting arm are not activated.
  • the second moving means for moving the first coupling piece can be hydraulic moving means, for example a piston present in a cylinder to which the first coupling piece is connected.
  • These second moving means can, however, also be designed differently, such as pneumatic or electromechanical, for example a spindle driven by an electric motor that moves a spindle nut present on the spindle along the spindle, which spindle nut is connected to the first coupling piece.
  • the transmission can be an electrical connection that transmits an electrical signal from the sensor to the actuator, but preferably the transmission is a mechanical transmission.
  • a robust and reliable design of the mechanical transmission is characterized in that the transmission is formed by a lever, of which one end is present in or near the coupling eye and can be moved by the coupling pin and of which the other end is located near the switch and can press it.
  • the hydraulic coupling may only engage after the mechanical coupling has been established.
  • the sensor detects the establishment of the mechanical coupling and activates the actuator via the transmission.
  • the actuator operates the switch that activates the hydraulic coupling.
  • the transmission is formed by a tube filled with roller bodies that are against each other and have a diameter that is slightly smaller than the height of the tube and have a width that is slightly smaller than the width of the tube such that if a rolling body is pushed into the tube at one end of the tube, all rolling bodies in the tube will move, whereby the rolling body at the other end of the tube is pushed out of the tube, whereby in each end of the tube, a pin is present that can be partially moved in and out of the tube, one of pins forms the sensor and can move the rolling bodies in the tube and the other pin forms the actuator which can be moved by the rolling bodies, and where one of the ends of the tube is present in or near the coupling eye and the pin present in that end can be moved by the coupling pin and the other end of the tube is present near the switch and the pin in that end can press the switch.
  • the rolling bodies are formed by balls and the tube is designed as a tube with a circular cross-section. This ensures that
  • the hydraulic coupling means are located in the lower half of the free end of the lifting arm near the moving means for the coupling pin and they are also operated by the moving means for moving the coupling pin.
  • the disadvantage of this is that the hydraulic coupling means regularly become contaminated or damaged by dirt or debris on the ground. As a result, the hydraulic coupling means often need to be cleaned or repaired.
  • the mechanical coupling means further comprise at least one coupling fork present on the lifting arm, as well as a coupling bar present on the tool and which, if the tool is coupled to the lifting arm, is coupled to the coupling fork, whereby the first and second hydraulic coupling pieces are closer to the coupling bar than to the coupling eye.
  • the first and second hydraulic coupling pieces seen in side view, are located at the location of the coupling bars.
  • the mechanical coupling means preferably comprise two parallel coupling forks of which said coupling fork forms part, as well as two in-line coupling bars of which said coupling bar forms part.
  • the mechanical coupling means preferably further comprise two in-line coupling pins that can be moved in opposite directions, of which said coupling pin forms a part, as well as two parallel coupling eyes of which said coupling eye forms a part.
  • a lifting arm 1 of a machine tool is shown in side view and in top view near the free end 3 of the lifting arm.
  • the machine tool is a wheel loader of which only part of the lifting arm 1 is shown.
  • the lifting arm 1 is provided at the free end 3 with mechanical and hydraulic coupling means for coupling with a tool.
  • the lifting arm 1 is connected at one end to a frame (not shown) of the machine tool and at the other, free end 3 is provided with mechanical coupling means for coupling to a tool.
  • These mechanical coupling means are formed by two parallel coupling forks 5 and two movable coupling pins 7.
  • moving means 9 formed by a hydraulic cylinder in which pistons can be moved to which the coupling pins 7 are attached.
  • the free end 3 of the lifting arm 1 is further provided with hydraulic coupling means.
  • These hydraulic coupling means are formed by first hydraulic coupling pieces 11 (tube pieces) that are present at the ends of hydraulic hoses 13.
  • the lifting arm 1 is further provided with further moving means 17 that can slide the hydraulic coupling pieces 11 into and out of a housing. These further moving means 17 can be switched on by a switch 15 present on the lifting arm.
  • Figures 3 and 4 show a tool 21 designed as a shovel bucket in side view and in rear view.
  • the tool 21 is also provided with mechanical and hydraulic coupling means.
  • the mechanical coupling means of the tool 21 are formed by two coupling bars 23 with which the coupling forks 5 can be coupled and two coupling eyes 25 into which the coupling pins 7 can be inserted.
  • the hydraulic coupling means are formed by second hydraulic coupling pieces 27 to which the first hydraulic coupling pieces 11 can be coupled. These second hydraulic coupling pieces 27 are also formed by pipe pieces into which the first hydraulic coupling pieces 11 can be slid.
  • the second hydraulic coupling pieces 27 are connected via further hydraulic hoses 26 to hydraulic cylinders 28 for rotating the shovel bucket (these hydraulic cylinders are not shown in Figures 4 and 6 ).
  • the tool 21 further has a sensor and an actuator.
  • the sensor is formed by a sensor pin 29 and the actuator by an actuator pin 31.
  • the sensor pin 29 is present at the location of one of the coupling eyes 25 and is moved during coupling or uncoupling of the lifting arm 1 with the tool 21 by one of the coupling pins 7 during insertion into the coupling eye 25 or withdrawal from the coupling eye 25.
  • the actuator pin 31 is located at a distance from the sensor pin 29 and - after moving the sensor pin 29 - operates the switch 15 that is present on the end of the lifting arm 1.
  • the switch 15 switches on the further moving means 17, which move the first hydraulic coupling pieces 11 so that they are coupled to or disconnected from the second hydraulic coupling pieces 27 on the tool 21.
  • the sensor pin 29 and the actuator pin 31 there is a mechanical transmission formed by a tube 33 filled with balls 35. These balls are in contact with each other and have a diameter that is almost equal to the inner diameter of the tube 33.
  • the sensor pin 29 and the actuator pin 31 are present in the ends of the tube 33 and are in contact with the balls 35 in the ends of the tube 33.
  • the tool coupled to the lifting arm is shown in side view and in rear view.
  • the coupling forks 5 are first slid around the coupling bars 23 by manipulating the lifting arm 1 and the coupling forks 5.
  • the coupling forks 5 are then rotated until the coupling pins 7 are located in front of the coupling eyes 25 on the tool 21.
  • the coupling pins 7 are then inserted into the coupling eyes 25 by the moving means 9.
  • One of the coupling pins 7 pushes the sensor pin 29 further into the tube 33. This sensor pin pushes away the balls 35 present in the tube 33 and these balls 35 push the actuator pin 31 further out of the tube 33.
  • This actuator pin presses the switch 15 on the lifting arm 1, which then switches on the further moving means 17.
  • the further moving means 17 slide the hydraulic coupling pieces 11 from a coupling block (housing) present on the lifting arm 1 into the further hydraulic coupling pieces 27 that are present in a coupling block (housing) present on the tool 21.
  • these two coupling blocks are positioned relative to each other with the coupling pieces 11 and 27 directly opposite each other.
  • Figure 7 shows the tool coupled to the lifting arm, but now provided with a second mechanical embodiment of the transmission.
  • This transmission is formed by a lever 39.
  • a protrusion that forms the sensor and is in contact with one of the coupling pins 7 and at the other end of the lever there is a further protrusion that forms the actuator and is in contact with the switch 15. If the coupling pin 7 protrudes through the coupling eye 25, it turns the lever 39, which in turn presses the switch 15, causing the further moving means 17 to be activated.
  • Figure 8 shows the tool coupled to the lifting arm provided with an electrical embodiment of the transmission.
  • the sensor is formed by a switch 43 of an electrical circuit 41 and the actuator is formed by an electrical contact 45 that is connected to the switch 15. If the coupling pin 7 protrudes through the coupling eye 25, it closes the electrical switch 43, causing a current to flow through the electrical circuit 41. Via the electrical contact 45, the switch 15 is supplied with power, which in turn activates the further moving means 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
EP23196078.2A 2022-09-08 2023-09-07 Werkzeugmaschine mit schnellkupplung Pending EP4335976A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2032988 2022-09-08

Publications (1)

Publication Number Publication Date
EP4335976A1 true EP4335976A1 (de) 2024-03-13

Family

ID=88147091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23196078.2A Pending EP4335976A1 (de) 2022-09-08 2023-09-07 Werkzeugmaschine mit schnellkupplung

Country Status (2)

Country Link
EP (1) EP4335976A1 (de)
NL (1) NL2035762A (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10200836A1 (de) * 2002-01-08 2003-07-24 Thomas Sauer Schnellwechselvorrichtung für Arbeitsmaschinen
US6735929B2 (en) * 2002-03-18 2004-05-18 Deere & Company Multifunction latch for a combine
US6899509B1 (en) * 2000-09-08 2005-05-31 Mailleux S.A. Method and a system for establishing mechanical and multiple-fluid couplings between a tool and a tool-carrier frame
US20180171576A1 (en) * 2015-06-26 2018-06-21 Caterpillar Sarl Indication system for a quick coupler assembly
US10681866B2 (en) * 2017-03-10 2020-06-16 Agco Do Brasil Sa Ltda Lock proving system for an agricultural machine attachment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6899509B1 (en) * 2000-09-08 2005-05-31 Mailleux S.A. Method and a system for establishing mechanical and multiple-fluid couplings between a tool and a tool-carrier frame
DE10200836A1 (de) * 2002-01-08 2003-07-24 Thomas Sauer Schnellwechselvorrichtung für Arbeitsmaschinen
US6735929B2 (en) * 2002-03-18 2004-05-18 Deere & Company Multifunction latch for a combine
US20180171576A1 (en) * 2015-06-26 2018-06-21 Caterpillar Sarl Indication system for a quick coupler assembly
US10681866B2 (en) * 2017-03-10 2020-06-16 Agco Do Brasil Sa Ltda Lock proving system for an agricultural machine attachment

Also Published As

Publication number Publication date
NL2035762A (nl) 2024-03-14

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