SE444305B - A grab with two oscillating grip arms - Google Patents
A grab with two oscillating grip armsInfo
- Publication number
- SE444305B SE444305B SE8301872A SE8301872A SE444305B SE 444305 B SE444305 B SE 444305B SE 8301872 A SE8301872 A SE 8301872A SE 8301872 A SE8301872 A SE 8301872A SE 444305 B SE444305 B SE 444305B
- Authority
- SE
- Sweden
- Prior art keywords
- arms
- gripper
- guide
- support
- grab
- Prior art date
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
-
- 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
- B66C1/28—Duplicate, e.g. pivoted, members engaging the loads from two sides
-
- 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
- B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
- B66C1/425—Gripping members engaging only the external or internal surfaces of the articles motor actuated
- B66C1/427—Gripping members engaging only the external or internal surfaces of the articles motor actuated by hydraulic or pneumatic motors
-
- 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
- B66C3/14—Grabs opened or closed by driving motors thereon
- B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Description
DETALJERAD BESKRIVNING Av FÖREDRAGET UTFÖRANDE 8301372-1 2 organen kan bilda en rätlinjig förskjutningsbana för grip- armarnas svängaxlar i riktning mot och från varandra. Man reducerar därigenom den maximala höjden hos griparen ovanför griparmarnas svängaxlar samtidigt som organ för anslutning av griparen till en lyftanordning, kran eller dylikt kan anbringas fast på den styrningen omfattande stommen. Kraft- organet kan vidare lokaliseras förhållandevis väl skyddat mellan bärorganen och företrädesvis mellan partier av styr- ningen Samtidigt som länkarmarna säkerställer den erforder- liga svängningen av griparmarna. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 8301372-1 2 the means can form a rectilinear displacement path for the pivot axes of the gripping arms in the direction of and away from each other. This reduces the maximum height of the gripper above the pivot axes of the gripper arms, at the same time as means for connecting the gripper to a lifting device, crane or the like can be attached to the frame comprising the guide. The power member can furthermore be located relatively well protected between the support members and preferably between portions of the guide. At the same time as the link arms ensure the required pivoting of the gripper arms.
KORT BESKRIVNING AV RITNINGARNA Under hänvisning till bifogade ritning följer nedan en när- mare beskrivning av ett såsom exempel anfört utförande av uppfinningen.BRIEF DESCRIPTION OF THE DRAWINGS With reference to the accompanying drawing, a more detailed description of an exemplary embodiment of the invention follows.
Pä ritningen är fig 1 en vy av griparen i ett läge med minimal gripvidd betraktad i riktningen av pilen P1 i fig 3, fig 2 en vy av griparen i läge för maximal gripvidd betraktad i'riktningen av pilen P2 i fig 3 samt fig 3 en vy av griparen i läge enligt fig 1 betraktad ovan- ifrån. r ben på ritningen illustrerade griparen innefattar två mot och från varandra med hjälp av ett kraftorgan 1 svängbart rörliga griparmar 2, 3. Var och en av dessa griparmar inbe- grlper'två åtskilda, 1 parallellt förhållande anordnade armpartier 4, 5 respektive 6, 7. Armpartierna hos vardera griparmen kan vid sina ytterändar vara inbördes förbundna medelst uppstagande förbindelsestycken 8. Griparmarnas sväng- axlar är betecknade 9 och 10 och de bildar väsentligen paral- lella geometriska axlar 11, 12. Griparmarnas svängaxlar 9, > 10 är förbundna med bärorgan 13, 14, vilka är förskjutbart rörliga längs efter en i en stomme 15 hos griparen utformad styrning 16. 8501872-1 Organ 17, såsom kopplingsöron eller dylikt,för anslutning 'av griparen till en lyftanordning, kranarm eller dylikt är fast anbragta i det centrala området av stommen och skjuter i riktning uppåt från styrningen 16. Griparen är företrädes- vis utformad att monteras fritt hängande i en kranarm med griparmarna riktade neråt, varvid mellan griparen och kran~_ armen finns en rotator för rotation av griparen kring en vertikal axel.In the drawing, Fig. 1 is a view of the gripper in a position with minimum gripping width viewed in the direction of the arrow P1 in Fig. 3, Fig. 2 is a view of the gripper in position for maximum gripping width viewed in the direction of the arrow P2 in Fig. 3 and Fig. 3 a view of the gripper in position according to Fig. 1 viewed from above. The gripper illustrated in the drawing comprises two gripping arms 2, 3 pivotally movable towards and away from each other by means of a force member 1. Each of these gripping arms comprises two separate arm portions 4, 5 and 6, 7 arranged in parallel relationship. The arm portions of each gripper arm can be interconnected at their outer ends by means of receiving connecting pieces 8. The pivot axes of the gripper arms are designated 9 and 10 and they form substantially parallel geometric axes 11, 12. The pivot shafts 9,> 10 of the gripper arms are connected to support members 13 , 14, which are slidably movable along a guide 16 formed in a body 15 of the gripper 16. Means 17, such as coupling ears or the like, for connecting the gripper to a lifting device, crane arm or the like are fixedly arranged in the central area. of the body and projects in an upward direction from the guide 16. The gripper is preferably designed to be mounted freely hanging in a crane arm with the gripper arms directed downwards, wherein between the gripper and the crane arm there is a rotator for rotating the gripper about a vertical axis.
Kraftorganet1 har sin kolvstång ansluten till det ena bär- organet 13 och sin cylinder ansluten till det andra bären organet 14. Styrningen 16 innefattar två inbördes åtskilda; väsentligen parallella balkpartier 17, 18 medan vart och ett av.bärorganen innefattar två hylsor 19, 20 respektive 21, 22, som omgriper styrningspartierna 17, 18. Mellan hylsorna i vart och ett av paren sträcker sig en axel' 23 respektive 24, vilken är omgripen av en med kraftorganets 1 kolvstång fast förbunden hylsa 25resp.ennæd kraftorganets cylinder fast förbunden hylsa 26. Kraftorganet är således beläget mellan styrningspartierna 17 och 18 och axlarna 23 och 24.The power member 1 has its piston rod connected to one support member 13 and its cylinder connected to the other support member 14. The guide 16 comprises two mutually separated ones; substantially parallel beam portions 17, 18 while each of the support members comprises two sleeves 19, 20 and 21, 22, respectively, which surround the guide portions 17, 18. Between the sleeves in each of the pairs extends a shaft 23 and 24, respectively, which is gripped by a sleeve 25 fixedly connected to the piston rod of the power member 1, respectively. The cylinder 26 fixedly connected to the cylinder of the power member is thus located between the guide portions 17 and 18 and the shafts 23 and 24.
De tidigare Omnämnda svängaxlarna 9, 10 för griparmarna 2, 3 är bildade av axeltappar som är fastsatta på hylsorna 19-22 och sträcker sig utåt från dessa.The previously mentioned pivot shafts 9, 10 for the gripping arms 2, 3 are formed by shaft pins which are attached to the sleeves 19-22 and extend outwards therefrom.
Hylsornas 19-22 förskjutbarhet längs med styrningspartierna 17, 18 begränsas i riktning mot griparens centrum med hjälp av stoppklackar 27 anordnade på styrningspartierna och i rikt- ning bort från centrum med hjälp av tvärstycken 28 som är lösgörbart fixerade vid styrningspartiernas 17, 18 motsatta ändar. ' Såsom tydligast framgår av fig 1 och 2 är axlarna 9, 10 belägna mitt på styrningspartierna 17, 18 så att alltså för- längningar av axlarna 9, 10 skär dessa styrningspartier. 8501872-1 Genom expansioncxfiisammandragning av kraftorganet 1 kan nu 'bärorganen 13, 14 och därmed axlarna 9, 10 förflyttas i riktning mot och från varandra utmed styrningen 16. För att samordna denna förflyttning med griparmarnas svängrörelser är anordnade två länkarmar 29 och 30. Länkarmen 29 har sin ena ände vridbart lagrad kring axeln 10 utanför grioarmens 3 armparti 4 medan länkarmens andra ände är ledat ansluten till griparmens 2 armparti 6 kring en axel 31 belägen pá avstånd på axeln 9. Den andra länkarmen 30 har sin ena ände roterbart ansluten till den på griparens andra sida befintliga axeltappen 9 innanför griparmens 2 armparti 7. Den andra änden av länkarmen 30 är vridbart ansluten till griparmenv 3 a avstand 3 kring en axel 32 belägen/från sistnämnda griparms sväng- axel 10; Räta linjer genom ledaxlarna till länkarmarna 29, 30 korsar varandra såsom antydes i fig 1 betraktat längs_ med nämnda axlar. :V A Vid expansion av kraftorganet kommer hylsorna 19-20 och 21-22 att förskjutas bort från varandra medan samtidigt griparmarna svängs isär genom de dragkrafter som förmedlas av länkarmarna 29, 30. Vid sammandragning av kraftorganet sker det motsatta, dvs att hylsorna och de därav burna axlarna 9, 10 kommer att närma sig varandra samtidigt som de tryck- krafter länkarmarna 29, 30 nu förmedlar ger upphov till svängning av griparmarna i riktning mot varandra.The displaceability of the sleeves 19-22 along the guide portions 17, 18 is limited in the direction of the center of the gripper by means of stop lugs 27 arranged on the guide portions and in the direction away from the center by means of cross pieces 28 which are releasably fixed at the opposite ends of the guide portions 17, 18. As can be seen most clearly from Figs. 1 and 2, the shafts 9, 10 are located in the middle of the guide portions 17, 18 so that extensions of the shafts 9, 10 thus intersect these guide portions. By expansion and contraction of the force member 1, the support members 13, 14 and thus the shafts 9, 10 can now be moved in the direction of and away from each other along the guide 16. To coordinate this movement with the pivoting movements of the gripper arms, two link arms 29 and 30 are provided. has one end rotatably mounted about the shaft 10 outside the arm portion 4 of the gripper arm 3 while the other end of the link arm is articulated connected to the arm portion 6 of the gripper arm 2 about a shaft 31 spaced from the shaft 9. The other link arm 30 has its one end rotatably connected to the the shaft pin 9 located on the other side of the gripper arm inside the arm portion 7 of the gripper arm 2, the other end of the link arm 30 is rotatably connected to the gripper arm 3a at a distance 3 around an axis 32 located / from the pivot axis 10 of the latter gripper arm; Straight lines through the hinge axes of the link arms 29, 30 cross each other as indicated in Fig. 1 viewed along said axes. : VA When expanding the power member, the sleeves 19-20 and 21-22 will be displaced away from each other while at the same time the gripping arms are pivoted apart by the tensile forces mediated by the link arms 29, 30. When the power member is contracted, the opposite happens, ie the sleeves and the the supported shafts 9, 10 will approach each other at the same time as the compressive forces the link arms 29, 30 now convey give rise to pivoting of the gripping arms in the direction of each other.
Uppfinningen kan modifieras på ett flertal sätt inom ramen för uppfinningstanken. Det är exempelvis icke nödvändigt -att länkarmarna 29 och 30 ansluts just till svängaxlarna 10 respektive 9 utan i stället skulle nämnda ändar av länk- armarna kunna fästas på bärorganen 13 respektive 14 på vrid- vbart sätt. i ! i | |The invention can be modified in a number of ways within the scope of the inventive concept. It is not necessary, for example, for the link arms 29 and 30 to be connected precisely to the pivot shafts 10 and 9, respectively, but instead the said ends of the link arms could be fastened to the support members 13 and 14, respectively, in a rotatable manner. i! i | |
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8301872A SE444305C (en) | 1983-04-06 | 1983-04-06 | GRIPERS WITH TWO TOGETHER AND FROM EVERY POWERFUL GRIP ARMS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8301872A SE444305C (en) | 1983-04-06 | 1983-04-06 | GRIPERS WITH TWO TOGETHER AND FROM EVERY POWERFUL GRIP ARMS |
Publications (4)
Publication Number | Publication Date |
---|---|
SE8301872D0 SE8301872D0 (en) | 1983-04-06 |
SE8301872L SE8301872L (en) | 1984-10-07 |
SE444305B true SE444305B (en) | 1986-04-07 |
SE444305C SE444305C (en) | 1992-03-30 |
Family
ID=20350666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8301872A SE444305C (en) | 1983-04-06 | 1983-04-06 | GRIPERS WITH TWO TOGETHER AND FROM EVERY POWERFUL GRIP ARMS |
Country Status (1)
Country | Link |
---|---|
SE (1) | SE444305C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989003800A1 (en) * | 1987-10-19 | 1989-05-05 | Hiab-Foco Ab | Crane-mounted implement |
WO2010042037A1 (en) * | 2008-10-09 | 2010-04-15 | Hultdin System Ab | Gripping device |
US10159200B2 (en) | 2015-11-12 | 2018-12-25 | Ramtec Oy | Stump extraction device, system and method for extracting stumps |
-
1983
- 1983-04-06 SE SE8301872A patent/SE444305C/en not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989003800A1 (en) * | 1987-10-19 | 1989-05-05 | Hiab-Foco Ab | Crane-mounted implement |
WO2010042037A1 (en) * | 2008-10-09 | 2010-04-15 | Hultdin System Ab | Gripping device |
US10159200B2 (en) | 2015-11-12 | 2018-12-25 | Ramtec Oy | Stump extraction device, system and method for extracting stumps |
Also Published As
Publication number | Publication date |
---|---|
SE444305C (en) | 1992-03-30 |
SE8301872L (en) | 1984-10-07 |
SE8301872D0 (en) | 1983-04-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
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