SE2250362A1 - Rotator for a rotator scale and a rotator scale for a lifting system - Google Patents

Rotator for a rotator scale and a rotator scale for a lifting system

Info

Publication number
SE2250362A1
SE2250362A1 SE2250362A SE2250362A SE2250362A1 SE 2250362 A1 SE2250362 A1 SE 2250362A1 SE 2250362 A SE2250362 A SE 2250362A SE 2250362 A SE2250362 A SE 2250362A SE 2250362 A1 SE2250362 A1 SE 2250362A1
Authority
SE
Sweden
Prior art keywords
rotator
loadcell
scale
shaft
connection
Prior art date
Application number
SE2250362A
Inventor
Olle Hildebrand
Original Assignee
Intermercato Ab
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 Intermercato Ab filed Critical Intermercato Ab
Priority to SE2250362A priority Critical patent/SE2250362A1/en
Priority to FI20235297A priority patent/FI20235297A1/en
Publication of SE2250362A1 publication Critical patent/SE2250362A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/005—Grab supports, e.g. articulations; Oscillation dampers; Orientation
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G23/00—Forestry
    • A01G23/003—Collecting felled trees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/16—Applications of indicating, registering, or weighing devices
    • 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
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681—Rotators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
    • G01G19/18—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads having electrical weight-sensitive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
    • G01G3/1402—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01G3/141—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being disc or ring shaped
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01L1/2231—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being disc- or ring-shaped, adapted for measuring a force along a single direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • B66C1/40—Crane hooks formed or fitted with load measuring or indicating 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
    • E02F9/24—Safety devices, e.g. for preventing overload

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Control And Safety Of Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The invention relates to a rotator (1 ) for a rotator scale (6) which comprises a rotator shaft (2) and is characterized in that the rotator shaft (2) is configured to receive a loadcell (3). The invention also relates to a rotator scale (6) for a lifting system (13), a method for weighing a load (7) handled by a rotator scale (6) and a computer program product.

Description

ROTATOR FOR A ROTATOR SCALE AND A ROTATOR SCALE FOR A LIFTING SYSTEM Technical field The invention relates to rotator for a rotator scale and a rotator scale for a lifting system. The invention also relates to a method for weighing a load handled by a rotator scale and a computer program product.
Background art ln many cases it is desirable to obtain knowledge of the weight of a load that is manipulated by lifting equipment such as a crane or similar, and in this way the weight of the total amount of goods manipulated. This type of information is important in order to make it possible to use the full loading capacity of a vehicle while at the same time avoiding overload. lt is not possible to obtain the said information if the weight of the goods is not known in advance. The same problem applies with other forces applied to a work implement, such as forces in terms of compression, tension or torsion.
There are several different types of loadcells for detecting and determining the size of a force applied to a work implement available on the market today. For example, different types of lifting equipment with integrated loadcells that can give, in response to an applied load, a signal that corresponds to the force that the applied load exerts on the loadcell is for example previously known.
According to prior art, a lifting system is conventionally constituted by a lifting arm connected to a rotator which in turn is connected to a first portion of a loadcell via a flange provided in the bottom section of the rotator. Some sort of work implement, such as a gripping tool, is then connected to a second portion of the loadcell.
A problem with such a lifting system is that it is very bulky and extensive, mainly in terms of hight and weight.
Summary of the invention lt is an objective of the present invention to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solve at least the above- mentioned problems.
According to a first aspect of the invention, these and other objects, and/or advantages that will be apparent from the following description of embodiments, are achieved, in full or at least in part, by a rotator for a rotator scale which comprises a rotator shaft and is characterized in that the rotator shaft is configured to receive a loadcell.
This is advantageous in that some of the components required to attach the loadcell to the rotator can be eliminated, such as, for example, the flange normally used to connect the loadcell to the bottom section of the rotator. ln turn, this will lead to a decreased weight, height and production cost for the rotator, or the system in which the rotator forms part.
The rotator shaft may be configured to penetrate a center through hole in the loadcell and be in direct connection with the loadcell when it is mounted to the rotator.
The rotator shaft may comprise attachment means on its outer periphery to be used for connection with an inner periphery of a center through hole in the loadcell.
The rotator shaft may comprise a threading, a wedge and/or splines to be used for connection with the loadcell.
The rotator shaft may protrude downwardly from the rotator in an axial direction thereof.
According to a second aspect of the invention, these and other objects are achieved, in full or at least in part, by a rotator scale for a lifting system. The rotator scale comprises a rotator having a rotator shaft, and a loadcell for detecting a weight of a load. The rotator scale is characterized in that the loadcell is connected to the rotator shaft of the rotator.
The loadcell may be equipped with a centre through hole through which the rotator shaft at least party extends.
The loadcell may be mounted directly onto the rotator shaft.
The rotator shaft may comprise attachment means on its outer periphery to be used for connection with the loadcell.
The attachments means may comprise a threading, a wedge and/or spfines.
The rotator scale may further comprise a connection plate housing electronics and/or a power supply, the connection plate being mounted to the rotator shaft and/or to a bottom portion of the Ioadcell.
The loadcell may comprise a first portion connectable to a lifting arm, a second portion connectable to a work implement, and an intermediate portion connecting the first portion and the second portion, wherein the intermediate portion comprising at least one strain gauge, and wherein the first portion, the second portion and the intermediate portion are connected to each other in a radial direction.
The loadcell may comprise attachment means on its inner periphery to be used for connection with the rotor shaft According to a third aspect of the invention, these and other objects are achieved, in full or at least in part, by a method for weighing a load handled by a rotator scale according to the features described above. The method is characterised by the steps of lifting the load by means of the work implement, and calculating a weight of the load based on a signal from the at least one strain gauge.
According to a fourth aspect of the invention, these and other objects are achieved, in full or at least in part, by a computer program product comprising a computer-readable storage medium with instructions adapted to carry out the method according to the features described above when executed by a device having processing capability.
Effects and features of the second, third and fourth aspects of the present invention are largely analogous to those described above in connection with the first aspect of the inventive concept. Embodiments mentioned in relation to the first aspect of the present invention are largely compatible with the further aspects of the invention.
Other objectives, features and advantages of the present invention will appear from the following detailed disclosure, from the attached claims, as well as from the drawings. lt is noted that the invention relates to all possible combinations of features.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [element, device, component, means, step, etc.]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, step, etc., unless explicitly stated otherwise.
As used herein, the term "comprising" and variations of that term are not intended to exclude other additives, components, integers or steps.
Brief description of the drawinds The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and non-limiting detailed description of embodiments of the present invention, with reference to the appended drawings, where the same reference numerals may be used for similar elements, and wherein: Fig. 1A is a perspective view of an exemplary embodiment of a rotator according to a first aspect of the invention.
Fig. 1B is a perspective view of an exemplary embodiment of a rotator according to a first aspect of the invention.
Fig. 2A and 2B are perspective views of an exemplary embodiment of a rotator scale according to a second aspect of the invention.
Fig. 3A is a perspective view of an exemplary embodiment of a loadcell of the rotator scale.
Fig. 3B is a perspective view of another exemplary embodiment of a loadcell of the rotator scale.
Fig. 4 is a perspective view of an exemplary embodiment of a lifting system which includes the rotator scale.
Detailed description of preferred embodiments of the invention Fig. 1A illustrates an exemplary embodiment of a rotator 1. The rotator comprises a rotator shaft 2 which protrudes downwardly from the rotator 1 in an axial direction thereof and which is configured to receive a loadcell 3. More specifically, the rotator shaft 2 is adapted to penetrate a center through hole 4 in the loadcell 3 and be in direct connection with the loadcell 3 when the loadcell 3 is mounted to the rotator 1. ln other words, the loadcell 3 is attached to the rotator 1 by being placed in a manner so that it surrounds the rotator shaft 2. ln the embodiment disc|osed in Fig 1A, the loadcell 3 is in direct contact with the rotator shaft 2 upon mounting to the rotator 1, however, other solutions are also possible. There could, for example, be a gap between the inner periphery of the center through hole 4 in the loadcell 3 and the rotator shaft 2. ln this case, the loadcell 3 is (only) attached directly to a bottom section of the rotator 1.
Fig. 1B illustrates another exemplary embodiment of a rotator 1. Here, the rotator shaft 2 comprises attachments means 5 on its outer periphery. The attachment means 5 comprises an outer threading but could naturally be constituted by a wedge and/or splines and/or other suitable solutions for connection with the loadcell 3. With such a solution, the loadcell 3 can be screwed onto the rotator shaft 2 and thereby attached to the rotator 1. ln Fig. 2A, an exemplary embodiment of a rotator scale 6 is illustrated. The rotator scale 6 comprises a rotator 1 having a rotator shaft 2, and a loadcell 3 for detecting a weight of a load 7. The loadcell 3 is connected to the rotator shaft 2 of the rotator 1. The rotator shaft 2 penetrates a center through hole 4 in the loadcell 3 in such a manner that the loadcell 3 will enclose the rotator shaft 2 of the rotator 1. ln this embodiment, the loadcell 3 is attached to a bottom section of the rotator 1 and in direct contact with the rotator shaft 2 upon mounting to the rotator 1 of the rotator scale 6.
However, other solutions are also possible. There could, for example, be a gap between the inner periphery of the center through hole 4 in the loadcell 3 and the rotator shaft 2. ln this case, the loadcell 3 is (only) attached directly to a bottom section of the rotator 1.
The rotator scale 6 also has a connection plate 8 which houses electronics and a power supply. The connection plate 8 also has a centre through hole which is penetrated by the rotator shaft 2 such that the connection plate encloses 8 the same. ln addition, the connection plate 8 is attached to a bottom portion of the loadcell 3. ln Fig. 2B, the rotator scale 6 is illustrated when completely mounted. ln this specific embodiment the loadcell 3 is in direct contact with the rotator shaft 2 of the rotator 1 but it is only attached to the bottom section of the of the rotator 1. The same applies to the connection plate 8 which also is in direct contact with the rotator shaft 2 of the rotator 1 but is only attached to a bottom portion of the loadcell 3.
Note, however, that the rotator shaft 2 may comprise attachments means 5 on its outer periphery. The attachment means 5 could be constituted by an outer threading but could naturally be constituted by a wedge and/or splines and/or other suitable solutions for connection with the loadcell 3. The same applies for the connection plate 8.
Fig. 3A illustrates an exemplary embodiment of the loadcell 3 in more detail. The load cell 3 is shaped as a round plate and comprises an outer portion 9, an inner portion 10 and an intermediate portion 11 connecting the outer portion 9 with the inner portion 10. The outer portion 9, the inner portion 10 and the intermediate portion 11 are integrally formed and connected to each other in a radial direction. ln another preferred embodiment, the outer portion 9, the inner portion 10 and the intermediate portion 11 are simply attached to each other in the radial direction of the load cell 3.
The intermediate portion 11 comprises a plurality of strain gauges 12 configured to measure the weight of the load 7 and provide a signal that is proportional to the weight of the load 7.
An upper section of the rotator 1 is connected to either the outer portion 9 or the inner portion 10 of the loadcell 3 while the connection plate 8 is connector to the other one of the outer portion 9 and the inner portion 10 of the loadcell 3. When the rotator scale 6 thereafter is connected to a lifting system, a lifting arm thereof is connected to the upper section of the rotator 1 and a working implement thereof is connected to the connection plate 8. ln one embodiment, the intermediate portion 11 comprises weakening portions (not shown) consisting of through holes which are evenly arranged adjacent to an outer end of the intermediate portion 11 in order to enhance any strain in the same. Here, the strain gauges 12 are arranged between the weakening portions of the intermediate portion 11, respectively.
Fig. 3B illustrates another exemplary embodiment of the loadcell 3 in more detail. Here, the loadcell 3 comprises attachment means 5 on its inner periphery to be used for connection with the rotor shaft 2. The attachment means 5 comprises an inner threading but could naturally be constituted by a wedge and/or splines and/or other suitable solutions for connection with the loadcell 3. ln Fig. 4, an exemplary embodiment of a lifting system 13 is illustrated. The lifting system 13 comprises a lifting arm 16 which is connected to a working unit 14 at one end and to the rotator scale 6 at the other end. The rotator scale 6 is in turn connected to a gripping tool 15.
When the weight of the load 7 carried by the gripping tool 15 is to be calculated, the strain in the intermediate portion 11 is measured by means of the strain gauges 12. The strain gauges 12 are configured to provide a signal that is proportional to the weight of the load 7. The strain in the intermediate portion 11 is a result of the forces acting on the outer portion 9 and the inner portion 10 in opposite directions.
Normally, a control unit (not shown) connected to the loadcell 3 is adapted to calculate the weight of the load 7 based on the signal from the strain gauges 12, and potentially display the results on some sort of display unit connected thereto. The control unit could potentially be located in a cab of the working unit 14 and the communication between the control unit and the display unit is preferably achieved by means of a cable or wireless connection.
The skilled person realizes that a number of modifications of the embodiments described herein are possible without departing from the scope of the invention, which is defined in the appended claims.
For instance, the size, number and shape of any components of the rotator 1 or rotator scale 6 may be varied in any suitable manner.

Claims (15)

Claims
1. A rotator (1 ) for a rotator scale (6), comprising: a rotator shaft (2), characterized in that the rotator shaft (2) is configured to receive a loadcell (3).
2. The rotator (1) according to claim 1, wherein the rotator shaft (2) is configured to penetrate a center through hole (4) in the loadcell (3) and be in direct connection with the loadcell (3) when it is mounted to the rotator (1).
3. The rotator (1) according to claim 1 or 2, wherein the rotator shaft (2) comprises attachment means (5) on its outer periphery to be used for connection with an inner periphery of a center through hole (4) in the loadcell (s).
4. The rotator (1) according to claim 1 or 2, wherein the attachment means (5) of the rotator shaft (2) comprises a threading, a wedge and/or splines to be used for connection with the loadcell (3).
5. The rotator (1) according to anyone of the preceding claims, wherein the rotator shaft (2) protrudes downwardly from the rotator in an axial direction thereof.
6. A rotator scale (6) for a lifting system (13), comprising: a rotator (1) having a rotator shaft (2), and a loadcell (3) for detecting a weight of a load (7), characterized in that the loadcell (3) is connected to the rotator shaft (2) of the rotator (1 ).
7. The rotator scale (6) according to claim 7, wherein the loadcell (3) is equipped with a centre through hole (4) through which the rotator shaft (2) at least party extends.
8. The rotator scale (6) according to claim 7 or 8, wherein loadcell (3) is mounted directly onto the rotator shaft (2).
9. The rotator scale (6) according to any one of the claims 6 to 8, wherein the rotator shaft (2) comprises attachment means (5) on its outer periphery to be used for connection with the loadcell (3).
10. The rotator scale (6) according to 9, wherein the attachments means (5) comprises a threading, a wedge and/or splines.
11. The rotator scale (6) according to any one of the claims 6 to 10, further comprising a connection plate (8) housing electronics and/or a power supply, the connection plate (8) being mounted to the rotator shaft (2) and/or to a bottom portion of the loadcell (3).
12. The rotator scale (6) according to anyone of the claims 6 to 11, wherein the loadcell (3) comprises: a first portion (9; 10) connectable to a lifting arm (16), a second portion (9; 10) connectable to a work implement (15), and an intermediate portion (11) connecting the first portion (9; 10) and the second portion (9;10), wherein the intermediate portion (11) comprising at least one strain gauge (12), and wherein the first portion (9;10), the second portion (9;10) and the intermediate portion (11) are connected to each other in a radial direction.
13. The rotator scale (6) according to anyone of the claims 6 to 12, wherein the loadcell (3) comprises attachment means (5) on its inner periphery to be used for connection with the rotor shaft (2).
14. A method for weighing a load (7) handled by a rotator scale (6) according to claim 13, characterised by the steps of lifting the load (7) by means of the work implement (15), and calculating a weight of the load (7) based on a signal from the at least one strain gauge (12).
15. A computer program product comprising a computer-readable 5 storage medium with instructions adapted to carry out the method according to claim 14 when executed by a device having processing capability.
SE2250362A 2022-03-24 2022-03-24 Rotator for a rotator scale and a rotator scale for a lifting system SE2250362A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE2250362A SE2250362A1 (en) 2022-03-24 2022-03-24 Rotator for a rotator scale and a rotator scale for a lifting system
FI20235297A FI20235297A1 (en) 2022-03-24 2023-03-14 Rotator for a rotator scale and a rotator scale for a lifting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2250362A SE2250362A1 (en) 2022-03-24 2022-03-24 Rotator for a rotator scale and a rotator scale for a lifting system

Publications (1)

Publication Number Publication Date
SE2250362A1 true SE2250362A1 (en) 2023-09-25

Family

ID=88192358

Family Applications (1)

Application Number Title Priority Date Filing Date
SE2250362A SE2250362A1 (en) 2022-03-24 2022-03-24 Rotator for a rotator scale and a rotator scale for a lifting system

Country Status (2)

Country Link
FI (1) FI20235297A1 (en)
SE (1) SE2250362A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974257U (en) * 1972-10-11 1974-06-27
DE102005028123A1 (en) * 2005-04-25 2006-10-26 EBM Brosa Messgeräte GmbH & Co. KG Force measurement cell, for suspended tool of working device, has coupling, force measurement device, arranged so force flow into measurement body under compression misses force measurement device, force due to traction passes it
KR20120040982A (en) * 2010-10-20 2012-04-30 주식회사 티엠티엔지니어링 Load cell unit for knuckle crane
CN204958193U (en) * 2015-07-15 2016-01-13 北京东方威特称重设备系统有限公司 Hang weighing device on container weight and centre of gravity place check out test set
EP3409635A1 (en) * 2017-05-29 2018-12-05 Intermercato AB Weighing system for a lifting device
EP3644026A1 (en) * 2018-10-19 2020-04-29 Indexator Rotator Systems AB A weighing link for a rotator
WO2020240093A1 (en) * 2019-05-29 2020-12-03 Ponsse Oyj Suspendable scale for weighing a bundle and arrangement for hoisting a bundle
WO2022002871A1 (en) * 2020-07-03 2022-01-06 Indexator Rotator Systems Ab Rotator for a tool

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974257U (en) * 1972-10-11 1974-06-27
DE102005028123A1 (en) * 2005-04-25 2006-10-26 EBM Brosa Messgeräte GmbH & Co. KG Force measurement cell, for suspended tool of working device, has coupling, force measurement device, arranged so force flow into measurement body under compression misses force measurement device, force due to traction passes it
KR20120040982A (en) * 2010-10-20 2012-04-30 주식회사 티엠티엔지니어링 Load cell unit for knuckle crane
CN204958193U (en) * 2015-07-15 2016-01-13 北京东方威特称重设备系统有限公司 Hang weighing device on container weight and centre of gravity place check out test set
EP3409635A1 (en) * 2017-05-29 2018-12-05 Intermercato AB Weighing system for a lifting device
EP3644026A1 (en) * 2018-10-19 2020-04-29 Indexator Rotator Systems AB A weighing link for a rotator
WO2020240093A1 (en) * 2019-05-29 2020-12-03 Ponsse Oyj Suspendable scale for weighing a bundle and arrangement for hoisting a bundle
WO2022002871A1 (en) * 2020-07-03 2022-01-06 Indexator Rotator Systems Ab Rotator for a tool

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