EP2138272A2 - Outil de dévissage d'un piston sur la tige de piston d'un cylindre hydraulique et cylindre hydraulique - Google Patents

Outil de dévissage d'un piston sur la tige de piston d'un cylindre hydraulique et cylindre hydraulique Download PDF

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Publication number
EP2138272A2
EP2138272A2 EP09008156A EP09008156A EP2138272A2 EP 2138272 A2 EP2138272 A2 EP 2138272A2 EP 09008156 A EP09008156 A EP 09008156A EP 09008156 A EP09008156 A EP 09008156A EP 2138272 A2 EP2138272 A2 EP 2138272A2
Authority
EP
European Patent Office
Prior art keywords
piston
tool
connecting elements
piston rod
hydraulic cylinder
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Withdrawn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
EP09008156A
Other languages
German (de)
English (en)
Other versions
EP2138272A3 (fr
Inventor
Hans-Peter Lavergne
Ralph Söll
Christoph Guhl
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.)
Liebherr Hydraulikbagger GmbH
Original Assignee
Liebherr Hydraulikbagger GmbH
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 Liebherr Hydraulikbagger GmbH filed Critical Liebherr Hydraulikbagger GmbH
Publication of EP2138272A2 publication Critical patent/EP2138272A2/fr
Publication of EP2138272A3 publication Critical patent/EP2138272A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/488—Spanners; Wrenches for special purposes for connections where two parts must be turned in opposite directions by one tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0035—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for motor-vehicles
    • 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
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53687—Means to assemble or disassemble by rotation of work part

Definitions

  • the present invention relates to a tool for screwing a piston on the piston rod of a hydraulic cylinder and a corresponding hydraulic cylinder.
  • the hydraulic cylinder is advantageously the hydraulic cylinder of a working machine, in particular a hydraulic cylinder for moving a working device of a working machine.
  • the hydraulic cylinder can be used in a hydraulic excavator for moving the excavator handle.
  • the present invention is used with particularly advantageous effect in hydraulic cylinders with a piston diameter between 200mm and 500mm for use.
  • connection between the piston rod and the piston of a hydraulic cylinder is usually tightened today with rotation angle specification.
  • the predetermined angle of the threaded connection in particular for piston sizes of 200 mm piston diameter and more, but can only be achieved with very high torques.
  • Object of the present invention is therefore to provide a tool for screwing a piston on the piston rod of a hydraulic cylinder, by which the necessary tightening torques can be applied while easier handling. Furthermore, it is an object of the present invention to provide a hydraulic cylinder available, for which the tool according to the invention can be used.
  • the inventive tool for screwing a piston on the piston rod of a hydraulic cylinder in particular a hydraulic cylinder with a piston diameter of more than 200 mm, in this case has a first tool element with connecting elements for releasable connection to the piston and a relation to the first tool element rotatable second tool element with connecting elements detachable connection with the piston rod.
  • the first tool element is rotatably mounted on the second tool element.
  • the storage of the first tool element on the second Tool element can be done either directly or via one or more intermediate elements.
  • the bearing allows a rotational movement between the first and the second tool element about an axis of rotation, which, when the tool is connected to the piston and piston rod, corresponds to the axis of rotation of the screw connection between the piston and the piston rod.
  • a tool is provided, via which the piston can be securely and conveniently screwed onto the piston rod of the hydraulic cylinder, wherein the necessary tightening torques can be applied in a controlled manner.
  • a mobile tool is provided, which represents an economical alternative to existing stationary tightening machines.
  • the tool is easy and convenient to use on the job site.
  • the connecting elements of the tool in this case engage on the piston side on the piston rod, in particular on the piston side arranged mating connecting elements.
  • the piston rod no longer has to be fixed on the side facing away from the piston, since the second tool element engages on the piston rod on the piston rod.
  • a compact tool can be provided, which is thus easily transportable and manageable by a single operator.
  • the connecting elements engage at the end faces of the piston and / or piston rod.
  • the piston usually has a continuous bore, into which the piston rod is screwed, so that the piston-side end face of the piston rod is accessible.
  • counter-connecting elements are provided, on which engage the connecting elements of the tool.
  • connection of the connecting elements with the piston and / or piston rod takes place by positive engagement. This results in a secure connection over which high torques are transferable.
  • the connecting elements thereby comprise pins, which can be inserted into recesses on the piston and / or the piston rod, the insertion advantageously taking place axially.
  • the tool can be easily connected to the piston and / or the piston rod by it is advantageously pushed in the axial direction of the piston and / or piston rod.
  • the tool can be pushed simultaneously on the piston and the piston rod, so that the connection between the tool and piston and piston rod takes place in a single step.
  • the tool according to the invention further comprises a force member, in particular a gear, in particular a spindle gear, via which the rotational movement between the first tool element and the second tool element can be generated.
  • the force member thus generates the necessary for the tightening of the piston and piston rod high torques, which are applied via the first and the second tool element on the piston and piston rod.
  • the force member in this case has a connection element, via which it can be driven by means of any external drive, in particular an electric screwdriver.
  • the power element in particular in the form of a transmission, in particular in the form of a spindle gear, can thus be easily driven by an external drive, so that the tool can do without a drive itself.
  • the tool can in turn be made compact and inexpensive, being used as a drive by already existing on construction sites drives such. B. an electric screwdriver takes place.
  • any force members can be used.
  • a hydraulic cylinder which is driven by a small compact unit, find advantageous application.
  • electrohydraulic cylinders or pneumatic cylinders or any other linear drive for example, electrohydraulic cylinders or pneumatic cylinders or any other linear drive.
  • the first tool element and the second tool element on lever arms, via which the torque is introduced into the first tool element and the second tool element.
  • a high torque can be generated by the leverage of the lever arms.
  • a force element in particular a spindle gear
  • a spindle gear is provided between the lever arms of the first and the second tool element, via which the torque is generated.
  • the tool according to the invention has one or more adapters, via which the tool can be used for different pistons and / or piston rods.
  • the adapter is advantageously connected to the connecting elements of the tool and itself has connecting elements, via which the adapter with the piston and the piston rod of the hydraulic cylinder is releasably connectable.
  • the adapter transmits the torques necessary for tightening the piston and the piston rod to those hydraulic cylinders which have counter-connecting elements which are not compatible with the connecting elements provided on the tool.
  • the present invention further comprises a hydraulic cylinder with a piston rod and a piston screwed onto the piston rod, in particular a hydraulic cylinder with a piston diameter of more than 200 mm, wherein piston and piston rod mating connection elements for releasably connecting with the connecting elements of a tool for screwing the piston, in particular Counter-links for releasable connection with the fasteners of a tool as set forth above.
  • a hydraulic cylinder can accordingly the invention Tool can be used to easily and reliably tighten the piston on the piston cylinder.
  • the present invention further includes a piston rod for a hydraulic cylinder, as set forth above, with piston-side mating connection members for releasable connection to the connecting elements of a tool for screwing the piston.
  • the device comprises a piston for a hydraulic cylinder, as described above, with counter-connecting elements for releasable connection with the connecting elements of a tool for screwing the piston.
  • connection between the connecting elements and the counter-connecting elements takes place by positive locking.
  • connections can be made with simple structural means, via which the necessary high torques can be transmitted.
  • the counter-connecting elements are arranged on the front side of the piston rod and / or piston.
  • a relatively small-sized tool can be used, which only has to act on the end faces of piston rod and piston.
  • the mating connecting elements comprise recesses into which the connecting elements of the tool can be inserted in a form-fitting manner, the insertion advantageously taking place axially.
  • the present invention further includes an adapter for a tool, as set forth above, via which the tool can be used for different pistons and / or piston rods.
  • the adapter thus allows the assembly of different hydraulic cylinders with only one tool by the adapter provides the necessary for the mating connecting elements on the respective piston or on the respective piston rod fasteners.
  • the adapter has a first and a second adapter element which are rotatable relative to each other.
  • the two adapter elements are rotatably mounted to each other.
  • the adapter has counter-connecting elements for connection to the connecting elements of the tool and connecting elements for connection to the counter-connecting elements of the piston and the piston rod.
  • the first adapter element carries the mating connection elements for connection to the connection elements of the first tool element and the connection elements for connection to the mating connection elements of the piston
  • the second adapter element carries the mating connection elements for connection to the connection elements of the second tool element and the connection elements for connection to the mating connection elements of the piston.
  • the mating connecting elements of the adapter can be formed as recesses into which the connecting elements of the tool engage, the connecting elements of the adapter can be designed as pins, which engage in the formed as a recess mating connecting elements on the piston and piston rod.
  • a plurality of adapters may be provided which allow the tool according to the invention to be used with a plurality of different hydraulic cylinders.
  • the present invention comprises a working device, in particular a movable working device, in particular a construction device, in particular a hydraulic excavator, with at least one hydraulic cylinder according to the invention.
  • FIGS. 1 a and 1 b A first embodiment of the inventive tool for screwing a piston 3 on the piston rod 4 of a hydraulic cylinder is in FIGS. 1 a and 1 b shown.
  • the tool has a first tool element 1 with connecting elements 10 for detachable connection to the piston 3 and a second tool element 2 rotatable relative to the first tool element 1 with connecting elements 20 for detachable connection to the piston rod 4.
  • the connecting elements 10 and 20 are pins, which can be inserted axially into corresponding bores on the piston and piston rod. Via the connecting elements 10 and 20, a positive connection between the first tool element 1 and the piston or the second tool element 2 and the piston rod 4 can be produced via which the torques necessary for tightening the piston on the piston rod can be transmitted.
  • the mating connection elements on Piston 3 and the piston rod 4 are arranged on the piston-side end faces of piston rod and piston, so that the tool can be slid easily axially on the piston and piston rod.
  • the second tool element 2 in this case has a disc-shaped connecting plate, on which the connecting elements 20 are arranged, the first tool element 1, a likewise disk-shaped connecting plate on which the connecting elements 10 are arranged.
  • the connecting plate of the first tool element 1 is annular disk-shaped and has a central opening through which the connecting elements 20 pass on the connecting disk of the second tool element 2. In this opening and the connecting disc of the second tool element 2 is guided.
  • the first tool element 1 is rotatably mounted on the second tool element 2, so that after connecting the tool with the piston and piston rod by rotating the first tool element 1 against the second tool element 2, the necessary for screwing piston 3 and piston rod 4 torque on the connecting elements 10 and 20th can be applied to the piston and the piston rod.
  • the tool element 1 is thereby rotated by a force member 30 relative to the second tool element 2, whereby the connecting elements 10 are rotated relative to the connecting elements 20 and so tighten the piston on the piston rod.
  • a force member 30 a spindle gear is provided in the embodiment.
  • the spindle gear in this case has a threaded rod 31 which is rotatably mounted on a bearing 32.
  • the spindle nut 33 On the threaded rod 31, the spindle nut 33 is arranged, which is so moved by rotating the threaded rod 31 along this.
  • the transmission of the force generated by the movement of the spindle gear is effected via a lever arm 11 of the first tool element 1 and a lever arm 21 of the second tool element 2.
  • the bearing 32 for the threaded rod 31 on a lever arm, the spindle nut 33 is arranged on the other lever arm.
  • the bearing 32 and the spindle nut 33 are pivoted to the lever arms in each case about a vertical pivot axis extending to the threaded rod.
  • the Linkage of the spindle nut 33 on the lever arm 11 prevents a rotational movement of the spindle 33 about the axis of the threaded rod 31st
  • a connecting element 34 is provided, via which the spindle by means of an external drive, for. B. an electric screwdriver is driven.
  • an electric screwdriver is driven.
  • the connection between the piston and piston rod can be either opened or closed.
  • the connecting elements 10 and 20 on the tool each comprise pins which are arranged perpendicular to the axis of rotation of the first and the second tool element and in each case opposite to the axis of rotation.
  • any other connection means are conceivable.
  • a second embodiment of the tool according to the invention is shown, in which instead of two pins a hexagonal contour 22 is provided on the tool element 2, which engages in a hexagon socket on the cylinder rod.
  • other geometries are also conceivable for the connecting elements 10 on the first tool element 1.
  • FIG. 2 Now the embodiment of the piston 3 and the piston rod 4 according to the invention is shown in a perspective view showing the respective piston-side end faces.
  • the counter-connecting elements 6 on the piston and the counter-connecting elements 8 can be seen on the piston rod, which serve the releasable connection with the connecting elements 10 and 20 on the tool according to the invention.
  • the counter-connecting elements 6 and 8 are recesses in which the connecting elements can be inserted axially.
  • the counter-connecting elements are each arranged on the front side of the piston and piston rod.
  • the externally arranged connecting elements 10 of the first tool element 1 are thereby in the mating connecting elements 6 on the piston, the internally arranged connecting elements 20 on the second tool element 2 in the mating connecting elements 8 at the Inserted end face of the piston rod.
  • the piston 3 By rotating the connecting elements 10 on the first tool element 1 and the connecting elements 20 on the second tool element 2, the piston 3 can then be screwed onto the piston rod 4 or unscrewed therefrom.
  • FIG. 2 To facilitate the attachment of the tool on piston and piston rod, are alternative to the in FIG. 2 also shown a plurality of circumferentially distributed counter-connecting elements 6 and 8 conceivable, so that the elements 1 and 2 are each connectable in different positions with the piston and piston rod.
  • a contour is used with a multi-directional symmetry, so that at a fixed position of piston 3 and piston rod 4 more positions of the tool elements 1 and 2 are possible to each other, in which a connection between the tool, piston and piston rod is possible.
  • the present invention further comprises an adapter.
  • the adapter 5 is in FIG. 3 shown.
  • the adapter comprises a first adapter element 51, which is connectable to the first tool element 1.
  • the adapter comprises a second adapter element 52, which is connectable via the counter-connecting elements 72 with the second tool element.
  • the connecting elements 10 and 20 are respectively inserted into the mating connecting elements 72.
  • the adapter elements further comprise connecting elements 61 and 62, via which the connection to the piston or the piston rod is produced.
  • the connecting elements 61 and 62 are inserted into the mating connecting elements 6 and 8 on the piston and piston rod.
  • the first adapter element 51 is in turn annular disc-shaped and has in its center a circular recess into which the second adapter element 52 is rotatably inserted.
  • the use of the adapter between the piston and piston rod and tool is also off FIG. 1 seen.
  • the present invention is used in a particularly advantageous manner in hydraulic cylinders, which have a piston diameter between 200 and 500 mm.
  • hydraulic cylinders of implements used especially of mobile equipment such.
  • Particularly advantageous it can be z. B. are used in hydraulic excavators.
  • the tool according to the invention can also be used generally for tightening large screw connections, when the parts to be screwed together have mating connecting elements, via which they can be connected to the connecting elements of the tool according to the invention.
  • appropriate adapter can be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Earth Drilling (AREA)
EP09008156.3A 2008-06-24 2009-06-22 Outil de dévissage d'un piston sur la tige de piston d'un cylindre hydraulique et cylindre hydraulique Withdrawn EP2138272A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202008008446U DE202008008446U1 (de) 2008-06-24 2008-06-24 Werkzeug zum Aufschrauben eines Kolbens auf der Kolbenstange eines Hydraulikzylinders und Hydraulikzylinder

Publications (2)

Publication Number Publication Date
EP2138272A2 true EP2138272A2 (fr) 2009-12-30
EP2138272A3 EP2138272A3 (fr) 2013-04-24

Family

ID=40940592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09008156.3A Withdrawn EP2138272A3 (fr) 2008-06-24 2009-06-22 Outil de dévissage d'un piston sur la tige de piston d'un cylindre hydraulique et cylindre hydraulique

Country Status (6)

Country Link
US (1) US8402879B2 (fr)
EP (1) EP2138272A3 (fr)
AU (1) AU2009202527A1 (fr)
CA (1) CA2669689A1 (fr)
DE (2) DE202008008446U1 (fr)
RU (1) RU2506153C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106256755A (zh) * 2015-06-19 2016-12-28 强哲菲 用于活塞加工生产线的转运叉车及活塞加工生产线
CN108381440A (zh) * 2018-05-11 2018-08-10 江苏永钢集团有限公司 一种用于拆装油缸底座的简易式旋转调节扳手
CN109079692A (zh) * 2018-01-08 2018-12-25 中国航天员科研训练中心 省力扳手组件

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DE112011104106B4 (de) 2010-08-12 2023-01-12 Schaeffler Technologies AG & Co. KG Werkzeug und Verfahren zur Rückstellung einer Verspanneinrichtung einer Steckverzahnung
US11001129B2 (en) 2015-12-30 2021-05-11 Nikola Corporation Cargo door for semi-truck
US10981609B2 (en) 2015-12-30 2021-04-20 Nikola Corporation Systems, methods, and devices for an automobile door or window
US10500701B2 (en) 2017-05-03 2019-12-10 Horizon Systems Machining, Inc. Spanner wrench
CN108730261B (zh) * 2018-06-08 2024-09-10 中国电建集团贵阳勘测设计研究院有限公司 一种油缸支铰的改进方法及结构
DE102020118658A1 (de) 2020-07-15 2022-01-20 Endress+Hauser Conducta Gmbh+Co. Kg Vorrichtung zum Öffnen eines Sensors und Sensorsystem

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Publication number Priority date Publication date Assignee Title
CN106256755A (zh) * 2015-06-19 2016-12-28 强哲菲 用于活塞加工生产线的转运叉车及活塞加工生产线
CN109079692A (zh) * 2018-01-08 2018-12-25 中国航天员科研训练中心 省力扳手组件
CN108381440A (zh) * 2018-05-11 2018-08-10 江苏永钢集团有限公司 一种用于拆装油缸底座的简易式旋转调节扳手

Also Published As

Publication number Publication date
CA2669689A1 (fr) 2009-12-24
DE202008008446U1 (de) 2009-11-05
RU2009123981A (ru) 2010-12-27
RU2506153C2 (ru) 2014-02-10
EP2138272A3 (fr) 2013-04-24
AU2009202527A1 (en) 2010-01-14
US20100018083A1 (en) 2010-01-28
US8402879B2 (en) 2013-03-26
DE102009030285A1 (de) 2010-02-25

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