US3394828A - Industrial trucks - Google Patents

Industrial trucks Download PDF

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Publication number
US3394828A
US3394828A US541825A US54182566A US3394828A US 3394828 A US3394828 A US 3394828A US 541825 A US541825 A US 541825A US 54182566 A US54182566 A US 54182566A US 3394828 A US3394828 A US 3394828A
Authority
US
United States
Prior art keywords
mast
chassis
truck
section
tilt
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.)
Expired - Lifetime
Application number
US541825A
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English (en)
Inventor
Dixon John David
Goodacre Ronald
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.)
Linde Material Handling UK Ltd
Original Assignee
Lansing Bagnall Ltd
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 Lansing Bagnall Ltd filed Critical Lansing Bagnall Ltd
Application granted granted Critical
Publication of US3394828A publication Critical patent/US3394828A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/08—Masts; Guides; Chains
    • B66F9/082—Masts; Guides; Chains inclinable

Definitions

  • An industrial lift truck is provided with a chassis, a detachable mast releasably and pivotally mounted on the chassis at a point above the lower end of the mast, and two tilt-jacks, each jack being pivotally connected at one end to the chassis and at its other end to a common connecting member which is in turn releasably connected to the lower end of the mast.
  • the arrangement is such that pivotal mounting of the mast on the chassis and the common connecting member provide means by which the mast is readily detachable from the chassis whilst maintaining the alignment of the tilt-jacks.
  • This invention relates to industrial trucks and more particularly to industrial trucks having masts.
  • a lift-truck is provided with a chassis, a detachable mast pivotally mounted on the chassis by means of releasable trunnion bearings located at some distance above the bottom end of the mast, and a tilt-jack mechanism below the trunnion bearings which mechanism comprises a tilt-jack or jacks attached to the chassis of the truck and detachably connected to the mast.
  • the tilt-jack or jacks are connected to the mast by a member which is detachably secured to the mast and pivoted to the tilt-jack or jacks.
  • the said member may comprise a cross member located at the bottom end of the mast and carrying pivotal connections for two tilt-jacks arranged sideby-side behind the mast.
  • the mast has a permanent bottom cross member which rests on the cross member to which it is detachably secured, and the permanent bottom cross member supports a lift-jack on the mast.
  • such a jack may be provided with a flexible hydraulic supply pipe and there may be a quick-release coupling by which the supply pipe can be connected to a supply on the chassis.
  • the controls for the supply of hydraulic fluid to apparatus on the mast are all easily located on the chassis of the truck and when the supply pipe is connected up the apparatus on the mast will be immediately operable.
  • FIGURE 1 is an elevation of the truck
  • FIGURE 2 is a plan view of the truck shown in FIG- URE 1, part of the mast of the truck being shown in section.
  • a truck 10 comprising a chassis 11 having longitudinal lateral members 12 which, at the front end, carry downwardly extending brackets 13 supporting a drive axle 14 and ground wheels 15.
  • the rear end of the chassis is also provided with further wheels 16 and means for steering them in known manner.
  • the brackets 13 at the front end of the chassis 11 of the truck extend from an inverted channel section member 17 made from steel plate which member is bent longitudinally above the ground wheel 15 on each side of the truck so as to form front Wheel arches 18 over the ground wheels 15.
  • a mast 19 having a first or fixed section comprising two upright members 20 of channel shape with the flanges of the channel members facing towards each other.
  • the members 20 are united by cross members 21, 22 at top and bottom respectively and a second or movable section of the mast, which section comprises two uprights 20a, runs between them.
  • a loadlifting carriage 23 to run up and down the uprights 20a and raise and lower loads.
  • the bottom cross-member 22 of the mast supports a central upright lifting jack 41 for raising the movable section of the mast and the loadlifting carriage 2-3.
  • a third section of mast in known manner, may be provided if desired.
  • trunnions 24 On the outside of the outer channel members 20 of the mast 19 a short distance above the level of the top of the wheel arches 18 there are laterally projecting trunnions 24 and secured to the upper surface of each arch member 18 below the associated trunnion 24 is a bottom section 25 of a trunnion block 26. Recesses 27 in the bottom sections 25 of the trunnion blocks are provided for reception of the trunnions 24, the trunnion blocks taking the weight of the mast when the mast is located in position.
  • each trunnion 24 is an upper or cap section 28 of the associated trunnion block 26 which upper section is pivoted at its rear end to the lower section of the block and is held down over the trunnion 24 by a bolt 29 directed upwardly from the lower section of the block and a nut 30 above it.
  • the upper section 28 of the trunnion block is provided with a slot 31 to receive the bolt 29 and the bolt is hinged to the lower section of the block so that when the nut 30 is released, the bolt can be swung forward and then the upper section 28 of the trunnion block can be swung upwardly to release the trunnion 24 on that side of the mast.
  • an angle-section cross member 32 having an upwardly projecting upright flange 33 behind behind the mast and a forwardly projecting horizontal flange 34 below the cross-member 22 on the mast, the cross-member 22 being bolted to the horizontal flange 34 of the cross-member 32 by bolts 35 which are easily accessible from the front of the truck.
  • brackets 37 Carried on the rear face of the upright flange 33 of the cross-member 32 are brackets 37 comprising pivotcarrying eyes which brackets are secured by pivot pins 38, to the rams 39 of two tilt jacks 40. These tilt jacks 40 are also pivoted on the chassis 11 of the truck at 44,
  • the lifting jack 41 on the mast 19 has a flexible hydraulic supply pipe 42 and the flexible pipe is led to a quick release self-sealing coupling 43 on the chassis 11 of the truck.
  • the mast 19 together with the lifting carriage 23 mounted upon it can then be removed entirely by lifting it from the remainder of the truck with suitable tackle and it can, if desired, be replaced by another mast, which may be of different design provided it is such as to fit on to the angle-shaped bottom cross-member 32 to which the tilt jacks are connected and it carries tr-unnions 24 of a suitable size to engage the trunnion blocks 26 on the chassis.
  • a truck of the type described above is in ports where the truck would sometimes be used on the quayside and at other times below decks on a ship.
  • the truck could be conveniently provided with a choice of two masts, one mast being, for example, a triple mast for use on the quayside and the other mast being a short one or two stage mast for use on the ships.
  • An industrial lift truck having a chassis, a detachable mast, a releasable pivotal mounting connecting the mast to the chassis at a point above the lower end of the mast and a tilt-jack mechanism comprising two tilt-jacks, each jack being pivotally connected at one end to the chassis and pivotally connected at its other end to a separately constructed common connecting member which member is in turn releasably connected to the lower end of the mast and thereby below the said pivotal mounting of the mast on the chassis, the said releasable pivotal mounting of the mast on the chassis and the said common connecting member providing means by which the mast is readily detachable from the chassis while maintaining the alignment of the tilt-jacks.
  • a truck as claimed in claim 1 in which the mast comprises two spaced-apart uprights united by a cross-member at their lower ends and in which the said cross-member rests on the said common connecting member connnecting the said other ends of the tilt-jacks and is fixed thereto by detachable means which are located between the mast uprights and readily accessible from the front of the truck.
  • a truck as claimed in claim 1 in which the said pivotal mounting of the mast on the chassis comprises two horizontal shafts fixed to the mast and received within trunnion bearings fixed to the chassis of the truck, each trunnion bearing comprising a lower section fixed to the chassis and an upper or cap section capable of holding the associated shaft between the two sections of the bearing, the said upper or cap section being displaceable with respect to the said lower section to allow assembly of the shaft with and removal of the shaft from the bearing.
  • a truck as claimed in claim 3 in which the upper or cap section of each trunnion bearing is hinged to its associated lower section and in which means are provided for fixing the upper or cap section in a position which holds the associated shaft between the two sections of the bearing.
  • a truck as claimed in claim 1 in which the mast is provided with a load-lifting carriage and a jack for raising the carriage relatively to the mast, in which the jack is provided with a flexible hydraulic supply pipe and in which there is a quick release coupling by which the supply pipe is connected to a supply on the chassis.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US541825A 1965-04-12 1966-04-11 Industrial trucks Expired - Lifetime US3394828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15528/65A GB1085537A (en) 1965-04-12 1965-04-12 Improvements in or relating to industrial trucks having masts

Publications (1)

Publication Number Publication Date
US3394828A true US3394828A (en) 1968-07-30

Family

ID=10060727

Family Applications (1)

Application Number Title Priority Date Filing Date
US541825A Expired - Lifetime US3394828A (en) 1965-04-12 1966-04-11 Industrial trucks

Country Status (5)

Country Link
US (1) US3394828A (de)
CH (1) CH447942A (de)
DE (1) DE1456647A1 (de)
GB (1) GB1085537A (de)
SE (1) SE309194B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50613Y1 (de) * 1968-11-08 1975-01-09
DE3617026A1 (de) * 1986-05-21 1987-11-26 Jungheinrich Kg Stapelfahrzeug mit einem schwenkbar gelagerten hubgeruest

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712391A (en) * 1952-06-09 1955-07-05 Ernest C Jones Mobile lift fork
US2867341A (en) * 1957-01-04 1959-01-06 Henry A Tieslau Load carriage for a road vehicle
US2923426A (en) * 1957-10-14 1960-02-02 Vernon J Brandt Releasable tool mounting apparatus
US3081891A (en) * 1958-07-16 1963-03-19 Warner Swasey Co Material handling apparatus
US3198278A (en) * 1959-12-04 1965-08-03 Linde Eismasch Ag Frame for a fork lifting vehicle
US3272287A (en) * 1964-08-18 1966-09-13 Jimmy D Worthey Materials handling apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712391A (en) * 1952-06-09 1955-07-05 Ernest C Jones Mobile lift fork
US2867341A (en) * 1957-01-04 1959-01-06 Henry A Tieslau Load carriage for a road vehicle
US2923426A (en) * 1957-10-14 1960-02-02 Vernon J Brandt Releasable tool mounting apparatus
US3081891A (en) * 1958-07-16 1963-03-19 Warner Swasey Co Material handling apparatus
US3198278A (en) * 1959-12-04 1965-08-03 Linde Eismasch Ag Frame for a fork lifting vehicle
US3272287A (en) * 1964-08-18 1966-09-13 Jimmy D Worthey Materials handling apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50613Y1 (de) * 1968-11-08 1975-01-09
DE3617026A1 (de) * 1986-05-21 1987-11-26 Jungheinrich Kg Stapelfahrzeug mit einem schwenkbar gelagerten hubgeruest

Also Published As

Publication number Publication date
DE1456647A1 (de) 1969-01-02
CH447942A (de) 1967-11-30
GB1085537A (en) 1967-10-04
SE309194B (de) 1969-03-10

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