EP3181307A1 - Vielseitiges handhabungswerkzeug - Google Patents

Vielseitiges handhabungswerkzeug Download PDF

Info

Publication number
EP3181307A1
EP3181307A1 EP15201300.9A EP15201300A EP3181307A1 EP 3181307 A1 EP3181307 A1 EP 3181307A1 EP 15201300 A EP15201300 A EP 15201300A EP 3181307 A1 EP3181307 A1 EP 3181307A1
Authority
EP
European Patent Office
Prior art keywords
tool
jib
balancing unit
fastener
mast
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.)
Granted
Application number
EP15201300.9A
Other languages
English (en)
French (fr)
Other versions
EP3181307B1 (de
Inventor
Joergen Klitgaard
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.)
Siemens Gamesa Renewable Energy AS
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP15201300.9A priority Critical patent/EP3181307B1/de
Priority to DK15201300.9T priority patent/DK3181307T3/en
Publication of EP3181307A1 publication Critical patent/EP3181307A1/de
Application granted granted Critical
Publication of EP3181307B1 publication Critical patent/EP3181307B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0028—Tool balancers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0042—Stands

Definitions

  • the invention relates to a device for handling a tool for tightening a fastener.
  • the invention relates to a portable versatile device for handling a tool too heavy to handle ergonomically safe for the operator, for instance when tightening a fastener.
  • the invention relates to a method of tightening a plurality of fasteners for assembling two components of a wind turbine.
  • Fasteners such as bolts, screws or nuts can be tightened by various ways.
  • a wrench is also referred to as a spanner and benefits from a leverage effect in order to impact the necessary torque on the fastener.
  • a torque wrench is a particularly shaped and configured wrench which is specifically suited to impact the necessary torque on the fastener. Such a torque wrench can be handled manually or hydraulically or pneumatically. A hydraulic torque wrench is particularly useful if high torques have to be applied to the fastener. This is in practice typically necessary for large bolts which are designed to withstand considerable forces.
  • a power tool When tightening structural bolts in a wind turbine, some sort of a power tool is needed due to the size of the fasteners, which implies that a high torque, i.e. a large force, is needed to tighten such fasteners.
  • a power tool is a hydraulic torque tool, but other types of power tools for tightening fasteners exist as well.
  • a standard tool balance is typically built with a spiral spring attached to a tapered cable drum, thereby it can provide a constant pulling force over a big working range.
  • An example of a conventional factory workplace with a standard tool balance is shown in Figure 1 .
  • a device for handling a tool for tightening a fastener wherein the device is suitable to assist assembly of two components of a wind turbine.
  • the device comprises a mast, a jib and a balancing unit.
  • the balancing unit is attached at the jib, is arranged and prepared to be connected to the tool, and is arranged and prepared to counteract at least partially the weight of the tool.
  • the mast comprises means for raising and lowering the jib.
  • the device is advantageous for handling a tool with a mass exceeding an ergonomic limit for manual handling of tools.
  • the key aspect is that the inventive device and method is particularly advantageous for manually handling a tool which is tiring or even health-damaging if carried out regularly.
  • a lower limit for the ergonomic limit is ten kilogram. This implies that the device is particularly advantageous for handling a tool with a mass exceeding ten kilogram.
  • the device is particularly advantageous for tools which have a weight exceeding security limits which may exist for protecting installation and servicingworkers who need to operate these tools on joints with multiple fasteners.
  • An example of such a tool is a torque wrench, in particular a hydraulic torque wrench.
  • torque wrench and in particular the hydraulic torque wrench, is purely one example out of many tools which could be thought of to be handled with the present device. In principle, any tool which is too heavy to handle manually on a regular basis is suitable to be used in connection with the inventive device.
  • the balancing unit is attached movably at the jib of the device. This is due to the fact that the plurality of fasteners shall be reached by the tool, which is connected to the balancing unit.
  • the balancing unit may also be attached rigidly to the jib, and the tool, which is connected to the balancing unit, is able the plurality of fasteners by other means, e.g. by featuring connection means which are long enough to reach all fastener needed.
  • fasteners which can be tightened by the tool are a bolt and a nut.
  • inventive device can on the one side beneficially be used to initially assemble the two components of the wind turbine. On the other side, it can beneficially be used to retighten already existing assemblies by means of retightening already existing fasteners.
  • a spring which is arranged and prepared to be connected to the tool and which is arranged and prepared to counteract at least partially the weight of the tool.
  • This can be a standard tool balancer or , for instance, a gas spring. Gas springs are often both light-weight and powerful
  • the device is used such that the resulting force which the worker has to lift when operating and working with a twenty-five kilogram hydraulic torque wrench is equivalent to a gravitational force of less than fifty Newton.
  • the invention is also directed to a method of tightening joints with multiple fasteners.
  • the method comprises the steps of
  • a key aspect of the inventive method is that, by means of e.g. telescopic cylinders of the mast, tension on the tool can be applied and relieved selectively.
  • tension on the tool by means of the balancing unit is applied, the gravitational force which is due to the mass of the tool may be reduced significantly.
  • the mass of the tool being thirty kilogram may be virtually reduced to less than five kilogram by putting tension on the tool via the balancing unit. This is advantageous for the person operating the tool because then only the virtual mass of less than five kilogram has to be lifted, instead of the true mass of approximately thirty kilogram.
  • Applying tension on the balancing unit is done by raising e.g. the telescopic cylinders of the mast of the device. This is also referred to as raising the telescopic arm or telescopic column of the mast. Raising of the telescopic mast of the device can in principal be achieved by any means, e.g. electrically, pneumatically, hydraulically, manually, etc. In order to provide a simple, robust and light-weight tool, a preferred option is to provide a mechanical crank on the mast and to raise and lower the telescopic cylinders of the mast manually.
  • the device is attached to a specific section of the first component of the two components which need to be assembled together.
  • This first section may for example refer to a nut or a bolt or a hole of the component.
  • one option is to choose one of the nuts which needs to be tightened and attach the foot of the mast of the device to this nut.
  • This nut may then be referred to as the attachment nut.
  • the first fastener could be this nut which is (a) the furthest away from the attachment nut, but (b) which is still in reach of the jib of the device.
  • This nut would then advantageously be chosen to be the first fastener where the hydraulic torque wrench is located and placed at.
  • the tool is connected with the balancing unit.
  • the jib is raised by means of the telescopic cylinders of the mast. Raising can be performed for example by a mechanical crank. Due to the fact that the tool is connected with a balancing unit and the balancing unit is connected with the jib, by raising the jib a tension is put on the tool.
  • This tension provides a force which is substantially opposite to the gravitational force of the tool.
  • the resulting force which is experienced by the tool and which is experienced by a person operating and lifting the tool is the difference between the gravitational force and the tension force exerted by the balancing unit.
  • the jib is raised to such an extent that the weight of the tool is sufficiently reduced.
  • the actual mass of the tool of thirty kilogram may be reduced to less than five kilogram (or - equivalently - fifty Newton) by raising the jib by means of the telescopic arms of the mast accordingly.
  • the first fastener e.g. the first nut
  • the tool e.g. the hydraulic torque wrench.
  • the tool is taken from the first fastener and is moved substantially horizontally along the jib to the next fastener which needs to be tightened. Typically this is the fastener which is adjacent to the first fastener. The tool is applied to the next fastener and then this next fastener is tightened.
  • the telescopic mast is lowered such that tension on the tool is relieved.
  • the actual weight that is experienced by a person moving the device is only the weight of the device without the weight of the tool.
  • An example for the weight of the device is a mass of approximately ten kilogram.
  • the device is advantageously attached to another section, such as another attachment nut, and the described steps of tightening all nuts being in reach within the reach of the jib can be repeated.
  • the tool when moving the mast from one attachment nut to the next attachment nut, the tool as such can either be connected or disconnected from the balancing unit. It is, however, important that in any case tension on the tool needs to be relieved - advantageously entirely and completely relieved. Then it is ensured that the person who is transporting the device from one attachment nut to the next one only needs to carry and move the weight of the device and not additionally also the weight of the tool.
  • the mast is directed substantially vertically and/or the jib is directed substantially horizontally.
  • the mast which is, for instance, perfectly vertical in an unloaded state, might incline a few degrees, e.g. two degree, when the device is loaded by connecting the tool to the balancing unit and raising the jib.
  • substantially horizontal/ substantially vertical includes deviations up to five percent.
  • the tool is operated by hand, i.e. having a tension on it which causes the reduction of its mass experienced by the person operating the tool.
  • the tool can be operated within the reach of the horizontal jib of the device. This allows tightening a plurality of fasteners with a tool which might be too heavy to handle manually and with a device which is simple, robust and relatively light-weight.
  • Figure 1 shows a conventional factory workplace with a standard tool balance.
  • the workplace comprises a conventional device 30 with a mast 11, a horizontal jib 12 and a balancing unit 13.
  • the balancing unit 13 is a standard tool balance.
  • Figure 1 further shows a tool 21, which could e.g. be a tool for tightening fasteners, wherein the tool 21 is attached to the balancing unit 13.
  • the conventional device 30 is firmly attached to the ground. In other words, the conventional device 30 is immobile. Consequently, the items to be worked with by a worker 31, e.g. the fasteners which need to be fastened, are transported to the conventional device 30, instead of the device being transported to the fasteners.
  • FIG. 2 shows such a portable device 10 for handling a tool 21 for tightening a fastener.
  • Figure 2 is a perspective view on such a device 10.
  • the device 10 comprises a mast 11, wherein the mast 11 comprises two telescopic cylinders, namely a first telescopic cylinder 111 and a second telescopic cylinder 112.
  • the length of the mast in longitudinal direction can be varied.
  • An extension or a reduction of the length of the mast 11 can be achieved by operating a crank 113.
  • the crank 113 enables raising or lowering of the second telescopic cylinder 112 with regard to the first telescopic cylinder 111 by rotating manually the crank in clockwise or in counterclockwise direction, respectively.
  • a jib such as an arm is attached.
  • the jib 12 is orientated substantially perpendicular to the two telescopic cylinders 111, 112.
  • the jib is mounted and attached to the second telescopic cylinder 112; at the other end of the jib 12, a balancing unit 13 is attached to the jib 12.
  • the balancing unit is movably attached to the jib 12. This enables the user of the device 10 to vary and chose different positions of the balancing unit 13 with regard to the mast 11 of the device 10.
  • the balancing unit 13 is realized by a gas spring.
  • Figure 3 shows the same device 10 as illustrated in Figure 2 ; however, in a slightly different perspective.
  • the mast 11 with the two telescopic cylinders 111, 112 and the crank 113 can be discerned.
  • the jib 12 which is attached at its one end to the second telescopic cylinder 112 can be seen.
  • the balancing unit 113 is movably attached to the jib 12.
  • the direction of movement of the tool is referenced by reference sign 212.
  • the tool 21 which is supposed to be connected to the balancing unit 13 is arranged to be moved in the direction of 212.
  • Figure 3 furthermore illustrates the direction of movement of the jib 121.
  • the jib 12 is raised or lowered in substantially vertical direction by means of a relative movement of the first telescopic cylinder 111 and the second telescopic cylinder 112.
  • Figure 4 shows the device 10 during operation, namely during tightening nuts in a tower of a wind turbine.
  • Figure 4 shows two tower segments of a wind turbine, namely a first tower segment 23 and a second tower segment 24. These tower segments 23, 24 are held together, in other words assembled, by a plurality of fasteners.
  • Each fastener comprises a bolt and a nut.
  • the number of fasteners which are necessary to assemble and connect both tower segments amounts up to one hundred.
  • FIG. 4 shows the device 10 comprising the mast 11, the jib 12 and the balancing unit 13.
  • the mast 11 is placed upon one of the nuts, namely the attachment nut 25.
  • the attachment nut 25 is not a nut which is designed differently than the other nuts, it is just a nut that has been chosen to be the one where the device 10 is attached to.
  • the heavy hydraulic torque wrench or generally the tool 21, is connected to the balancing unit 13.
  • This connection might be carried out by a simple hook.
  • the balancing unit 13 might be realized by a standard gas spring, which is lightweight and powerful.
  • the telescopic cylinders 111, 112 are extended.
  • the jib 12 is raised. This is done manually by rotating the mechanical crank 113 which is located at the bottom of the mast 11.
  • the jib 12 is raised to such an extent that the tool 21 is sufficiently balanced. This means that the jib 12 is raised to such an extent that the virtual mass, that the person who is handling the tool 21 experiences, is significantly reduced. This might be for example the case when the mass of the tool 21 is reduced to an amount of less than five kilogram.
  • the tool 21 After having tightened the first fastener 221, the tool 21 is lifted slightly and shifted horizontally towards the mast 11 until reaching the second fastener 222. Lifting of the tool 21 is significantly facilitated as the tool 21 is balanced. Then the tool 21 is put into place for tightening the second fastener 222. Once the second fastener 222 is completely tightened, the tool 21 is lifted slightly again and shifted horizontally towards the mast until the third fastener 223 is reached. Subsequently, the tool 21 is lowered again slightly and the third fastener 223 is tightened by activating and operating the hydraulic torque wrench.
  • inventive concept in principle can well be transferred to other applications such as tightening fasteners at other areas in the wind turbine, for example the nacelle or the hub.
  • this inventive concept can also be applied outside the field of wind turbines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Wind Motors (AREA)
EP15201300.9A 2015-12-18 2015-12-18 Vielseitiges handhabungswerkzeug Not-in-force EP3181307B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15201300.9A EP3181307B1 (de) 2015-12-18 2015-12-18 Vielseitiges handhabungswerkzeug
DK15201300.9T DK3181307T3 (en) 2015-12-18 2015-12-18 ALTERNATIVE HANDLING TOOL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15201300.9A EP3181307B1 (de) 2015-12-18 2015-12-18 Vielseitiges handhabungswerkzeug

Publications (2)

Publication Number Publication Date
EP3181307A1 true EP3181307A1 (de) 2017-06-21
EP3181307B1 EP3181307B1 (de) 2018-11-14

Family

ID=54850443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15201300.9A Not-in-force EP3181307B1 (de) 2015-12-18 2015-12-18 Vielseitiges handhabungswerkzeug

Country Status (2)

Country Link
EP (1) EP3181307B1 (de)
DK (1) DK3181307T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109682927A (zh) * 2017-10-19 2019-04-26 江苏骆驼环保科技有限公司 一种固定污染源监测设备用防护安装装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2640447A1 (de) * 1976-09-08 1978-03-16 Weber Schraubautomaten Vorrichtung zum gewichtsentlasteten halten eines handschraubers
US4969625A (en) * 1988-05-26 1990-11-13 Nasco Industries, Inc. Torque reaction tool support apparatus
WO1996024000A1 (en) * 1993-07-09 1996-08-08 Cohen, Ruthie Extensible and retractable elements and various uses for the elements
DE19623265A1 (de) * 1995-06-24 1997-01-23 Volkswagen Ag Haltevorrichtung für ein Werkzeug
FR2749788A1 (fr) * 1996-06-12 1997-12-19 Chaffoteaux Et Maury Visseuse automatique d'atelier
WO2002011521A1 (fr) * 2000-08-10 2002-02-14 Yves Gourmelen Dispositif de support pour un outil coupant, notamment un taille haie
JP2014006080A (ja) * 2012-06-21 2014-01-16 Toyota Motor Corp 工具位置検知装置及び工具位置検知方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2640447A1 (de) * 1976-09-08 1978-03-16 Weber Schraubautomaten Vorrichtung zum gewichtsentlasteten halten eines handschraubers
US4969625A (en) * 1988-05-26 1990-11-13 Nasco Industries, Inc. Torque reaction tool support apparatus
WO1996024000A1 (en) * 1993-07-09 1996-08-08 Cohen, Ruthie Extensible and retractable elements and various uses for the elements
DE19623265A1 (de) * 1995-06-24 1997-01-23 Volkswagen Ag Haltevorrichtung für ein Werkzeug
FR2749788A1 (fr) * 1996-06-12 1997-12-19 Chaffoteaux Et Maury Visseuse automatique d'atelier
WO2002011521A1 (fr) * 2000-08-10 2002-02-14 Yves Gourmelen Dispositif de support pour un outil coupant, notamment un taille haie
JP2014006080A (ja) * 2012-06-21 2014-01-16 Toyota Motor Corp 工具位置検知装置及び工具位置検知方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109682927A (zh) * 2017-10-19 2019-04-26 江苏骆驼环保科技有限公司 一种固定污染源监测设备用防护安装装置

Also Published As

Publication number Publication date
EP3181307B1 (de) 2018-11-14
DK3181307T3 (en) 2019-02-25

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