GB2191990A - Boom assembly for a work machine - Google Patents

Boom assembly for a work machine Download PDF

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Publication number
GB2191990A
GB2191990A GB08615620A GB8615620A GB2191990A GB 2191990 A GB2191990 A GB 2191990A GB 08615620 A GB08615620 A GB 08615620A GB 8615620 A GB8615620 A GB 8615620A GB 2191990 A GB2191990 A GB 2191990A
Authority
GB
United Kingdom
Prior art keywords
boom
jib
far end
bending
pivotally attached
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Withdrawn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
GB08615620A
Other versions
GB8615620D0 (en
Inventor
Simo Lahikainen
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
Priority to SE8602761A priority Critical patent/SE449882B/en
Application filed by Individual filed Critical Individual
Priority to GB08615620A priority patent/GB2191990A/en
Publication of GB8615620D0 publication Critical patent/GB8615620D0/en
Publication of GB2191990A publication Critical patent/GB2191990A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • 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
    • B66C1/58—Gripping members engaging only the external or internal surfaces of the articles and deforming the articles, e.g. by using gripping members such as tongs or grapples
    • B66C1/585—Log grapples
    • 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
    • B66C1/68—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 mounted on, or guided by, jibs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

A boom assembly, for a work machine, comprises a hoist boom (1) mountable at one end on the work machine, and a bending boom (3) pivotally attached to the far end of the hoist boom and moved by aid of an actuator (2). At the far end of the bending boom (3) there is pivotally attached a jib (4), and at the far end of the jib there is pivotally attached an auxiliary jib (5), at the far end of which auxiliary jib (5) there can be installed, by means of conventional technique, various prior art working devices such as a log grab (6). To the bending boom (3) and the jib (4) there is pivotally connected an actuator (7) in order to move the jib with respect to the bending boom. To the jib (4) and the auxiliary jib (5) there is pivotally connected an actuator (8) in order to move the auxiliary jib with respect to the jib. A ground-engaging supporting means, shown as a plate (10) attached to part (9) of the jib (4), secures the jib (4) firmly against the ground, even if the ground is soft. Alternatively a support leg may be used. <IMAGE>

Description

SPECIFICATION Boom assembly for a work machine The present invention relates to a boom assembly for a work machine, defined in the introductorysection of the appended patent claim 1.
The types of work machines currently used in connection with lorries, tractors and forest work machines are generally boom cranes consisting of a hoist boom pivotally attached to the work machine in question, and of a bending boom pivotally attached to the far end of the hoist boom, wherein various working equipment can be attached to the far end of the bending boom in orderto carry out different work tasks. In order to extend the working range, i.e.
the scope ofthe crane, the bending boom is often provided with a telescopic jib whereby the working range can be enlarged by roughly 50% of the length of the bending boom.
In the prior artthere is also known a method for extending the length of the boom assembly by first providing the bending boom with an articulated jib and then adding yet another articulated jib thereto, so that the whole boom assembly consists of four interarticulated arms. As regards the prior art, the following publications are referred to: US 2598517, US 3 221 908, US 3 253 716, and US 3 557 967.
The range of the boom assembly can naturally be enlarged by increasing the length of each arm. In that case, however, the whole apparatus becomes too heavy two be installed in light, farmer-type grab bucket loaders and the like. Consequently, the conventional heavy, long-range boom arrangements can be employed only in heavy duty machines.
The objectofthe present invention is to eliminate the aforementioned drawbacks. Another, specific object of the invention is to introduce a low-cost, simple and light boom assembly for a work machine, which boom assembly can be installed even in con nectionwith lightfarmer-type work machines, such as grab bucket loaders and tractors, and which has a working range almost twice as wide as any prior art equipment designed for light work machines.
The characteristic novel features ofthe invention are apparent from the claims section of the appended patent claims.
In the boom assembly of the invention, there can also be employed conventional telescopic arms con nectable to the jib, by aid of which the range ofthe boom assembly can be further extended. According to the invention, the boom assembly is provided with a supporting means whereby the boom assembly can be secured to the ground during the working performance. The supporting means may lean for instance against the bending boom or against the jib.
One advantage ofthe invention, as compared to the prior art, is that while for instance collecting logs inaforest,the damages causedforyoung growth are diminished because the created fresh tracks are not as numerous as while working with ordinary equipment. Moreover, the light structure and simple operation of the boom assembly provide forthe use of lighterwork machines than before.
In the following the invention is explained in more detail with reference to the appended drawing, which is an illustration of a preferred embodiment of the boom assembly of the invention.
The apparatus of the invention illustrated in the drawing comprises the hoist boom 1, the near end whereof is mountable, by conventional technique, on the employed work machine. At the far end ofthe hoist boom 1 there is pivotally attached the bending boom 3 which is moved, with respect to the hoist boom 1, by means of the actuator 2 which is a hydraulic cylinder. At the far end ofthe bending boom 3, the near end ofthe jib 4 is pivotally attached so thatthe jib 4 can be moved, with respect to the bending boom 3, supported by theircommon articul- ation 11 and driven by the actuator7 which is a hydraulic cylinder and is pivotally attached both to the bending boom 3 and the jib 4. Atthefarend ofthe jib 4, the near end ofthe auxiliary jib 5 is connected by means of the articulation 12.The auxiliary jib 5 is moved, with respect to the jib 4, supported by the articulation 12 and driven by the actuator 8 which again is a hydraulic cylinder. At the far end ofthe auxiliary jib 5there is installed, by means of conventional technique, the log grab 6. In addition to this, the apparatus comprises the supporting means 10 provided in the part 9 of the jib 4, which part is pressed againstthe ground while working. Thus the jib 4 can be firmly secured againstthe ground even if the ground is soft.
The preferred embodiment of the invention, illustrated in the drawing, is operated as follows. While collecting logs in a forest with light equipment, the hoist boom 1 and the bending boom 3 are extended towards the logs so thatthe far end of the bending boom 3 its finally pressed against the ground.
Thereafterthejib 4, run by the actuator 7, and the auxiliary jib 5, run by the actuator 8, reach towards the logs to be collected, whereafterthe logs are picked up by employing the log grab 6. Irrespective of the considerable length of the arm assembly, the work machine is not subjectto strong inclining forces becausetheapparatus is supported, by intermediation of the support plate 10, firmly on the ground. Thus it is unnecessary to use any extra supportfootingswhich are commonly used in prior art cranes and in the work machines housing the said cranes.
The invention is particularly well suited for farm tractors with a light construction, to be employed in small-farm forestwork. The invention is not, however, limitedtothis line of application only, but itcan also be applied in heavy duty work machines, as well as in lorries and corresponding vehicles ofvarying sizes. The actuators of the boom assembly are conventional hydraulic cylinders, the pressure hoses whereof are attached to the frame 1,3 and 4, and proceed in accordance with the frame structure.
Similarly, the log grab 6 iocated at the far end of the auxiliaryjib 5, is a device operated in conventional fashion, and it can be replaced by various other working devices. Accordingly, the above described preferred embodiment and application of the invention do not in anyway restrict the invention and its use, but the various applications of the invention can be largely modified within the scope of the in ventional idea presented in the appended patent claims. Thus for instance the support apparatus can be, apart from a support plate, also a supporting leg oranyothertype of supporting member leaning againstthe ground.

Claims (4)

1. A boom assemblyfor a work machine, the said assembly comprising a hoist boom (1 ) attached at one end to the work machine; a bending boom (3) pivotally attached to the far end ofthe hoist boom and moved by means of an actuator (2); a jib (4) pivotally attached to the far end ofthe bending boom (3); an auxiliaryjib (5) pivotally attached to the far end of the jib, to the far end ofwhich auxiliary jib (5) there can be connected, by conventional technique, various priorartworking devices such asa log grab (6); an actuator (7) pivotally attached botto the bending boom (3) and the jib (4) in orderto move the jib with respect to the bending boom; and an actuator (8) pivotally attached both to the jib (4) and the auxil iary (5) in order to move the auxiliaryjib with re- specttothejib,ch a ra cte rize d inthatthe boom assembly comprises a supporting means leaning againstthe bending boom orthejib in orderto secure the boom assembly firmly against the ground while working.
2. The boom assembly of claim 1, c h a r a c t e r i z e din that the supporting means is a support plate (10).
3. A boom assembly for a work machine su bstan- tially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
4. Awork machine provided with a boom assembly as claimed in any one of claims 1 to 3.
GB08615620A 1986-06-26 1986-06-26 Boom assembly for a work machine Withdrawn GB2191990A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE8602761A SE449882B (en) 1986-06-26 1986-06-23 TREE STRUCTURE FOR A WORKING MACHINE
GB08615620A GB2191990A (en) 1986-06-26 1986-06-26 Boom assembly for a work machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08615620A GB2191990A (en) 1986-06-26 1986-06-26 Boom assembly for a work machine

Publications (2)

Publication Number Publication Date
GB8615620D0 GB8615620D0 (en) 1986-07-30
GB2191990A true GB2191990A (en) 1987-12-31

Family

ID=10600137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08615620A Withdrawn GB2191990A (en) 1986-06-26 1986-06-26 Boom assembly for a work machine

Country Status (2)

Country Link
GB (1) GB2191990A (en)
SE (1) SE449882B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301513A1 (en) * 1992-10-22 1994-07-28 Karl Heitzler Apparatus for lifting plants by the individual root balls
WO1997008419A1 (en) * 1995-08-25 1997-03-06 Knut Dalland Multi-linked working boom for working machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033871A (en) * 1978-10-17 1980-05-29 Liner Ltd Improvements in or relating to lifting trucks
US4290731A (en) * 1979-03-26 1981-09-22 Griffith John A Apparatus for picking up overturned vehicles
EP0082377A1 (en) * 1981-12-04 1983-06-29 Fmc Corporation Extendable support for telescoping boom
GB2160497A (en) * 1984-06-19 1985-12-24 Gen Mining Union Corp Overhead loader

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033871A (en) * 1978-10-17 1980-05-29 Liner Ltd Improvements in or relating to lifting trucks
US4290731A (en) * 1979-03-26 1981-09-22 Griffith John A Apparatus for picking up overturned vehicles
EP0082377A1 (en) * 1981-12-04 1983-06-29 Fmc Corporation Extendable support for telescoping boom
GB2160497A (en) * 1984-06-19 1985-12-24 Gen Mining Union Corp Overhead loader

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301513A1 (en) * 1992-10-22 1994-07-28 Karl Heitzler Apparatus for lifting plants by the individual root balls
WO1997008419A1 (en) * 1995-08-25 1997-03-06 Knut Dalland Multi-linked working boom for working machine
US6076615A (en) * 1995-08-25 2000-06-20 Dalland; Knut Multi-linked working boom for working machine

Also Published As

Publication number Publication date
SE8602761D0 (en) 1986-06-23
GB8615620D0 (en) 1986-07-30
SE449882B (en) 1987-05-25

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)