GB2293363A - Lift Truck - Google Patents

Lift Truck Download PDF

Info

Publication number
GB2293363A
GB2293363A GB9519314A GB9519314A GB2293363A GB 2293363 A GB2293363 A GB 2293363A GB 9519314 A GB9519314 A GB 9519314A GB 9519314 A GB9519314 A GB 9519314A GB 2293363 A GB2293363 A GB 2293363A
Authority
GB
United Kingdom
Prior art keywords
lever
frame
load
rod
lift truck
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
GB9519314A
Other versions
GB9519314D0 (en
GB2293363B (en
Inventor
Rudolf Hendrich
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 GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of GB9519314D0 publication Critical patent/GB9519314D0/en
Publication of GB2293363A publication Critical patent/GB2293363A/en
Application granted granted Critical
Publication of GB2293363B publication Critical patent/GB2293363B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
    • B62B3/0612—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground power operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
    • B62B2301/20—Resilient wheel suspension using springs
    • B62B2301/23—Resilient wheel suspension using springs the pressure of the wheel on the ground being controlled, e.g. by the load or the wheel slip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
    • B62B3/0625—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground using rigid mechanical lifting mechanisms, e.g. levers, cams or gears

Description

1 2293363 TJft truck with a load-denendent pretensionable drive unit The
invention relates to a lift truck with a drive frame which has a vertically movable drive unit which can be pretensioned in a loaddependent manner in a vertical direction, and has a load-carrying frame which can be raised relative to the drive frame, wherein as a result of raising the load-carrying frame a lever is rotated about a horizontal transverse axis, which lever is disposed in the region of the loadcarrying frame adjoining the drive frame, and wherein a rod is articulated to the end of the lever, which rod is hingedly connected to a pivotable roller-type load-bearing member which is mounted on a load arm connected to the loadcarrying frame.
A lift truck of this type is known from DE 39 04 798 C2. By articulating the lower end of a hydraulic lift cylinder to a parallel linkage mounting of the drive unit, the reaction force of the lift cylinder occurring during raising the loadcarrying frame is used so as to act on the drive unit with a vertical force component in the direction of the ground surface, thereby rendering the ground contact force of the drive unit dependent on the size of the load. The drive wheel pressure is thereby continuously adapted to load conditions.
An object of the present invention is to make available a lift truck of the above type, in which a purely mechanical system is used for the loaddependent pretensioning of the drive unit.
According to the invention, in a lift truck of this type the rod is operatively connected to the drive unit via a link assembly for generating a substantially vertical force acting in the direction of the ground surface. Irrespective of whether a hydraulic lift cylinder is provided, a universally utilisable system is provided for the load- dependent pressing of the drive unit on the ground surface.
2 According to an advantageous development of the invention, to provide a simple construction, a second lever is connected, in a manner precluding relative rotation, to the first mentioned lever or to a component coupled thereto so as to be fixed in rotation therewith, and a second rod is articulated to the second lever, which second rod is hingedly connected to one end of a toggle lever which is mounted on the drive frame and the other end of which is coupled to the drive unit.
Advantageously, in a lift truck in which the drive unit is articulated to the drive frame by a parallel linkage mounting, the other end of the toggle lever is connected to at least one link of the parallel linkage mounting.
Further advantages and details of the invention will be described in more detail with reference to an embodiment illustrated, by way of example, in the accompanying diagrammatic drawings, wherein:
Figure 1 shows, in side view, a lift truck according to the invention, with a load-carrying frame in its lowered position; and Figure 2 shows the lift truck of Figure 1, with the loadcarrying frame in its raised position.
The lift truck illustrated in Figures 1 and 2 has a drive frame 1 and a load-carrying frame 2 mounted for movement thereon in a vertical direction. Raising the loadcarrying frame 2 is effected by means of a lifting assembly 3. A lever 4, which is disposed near to the ground in the region in which the load-carrying frame 2 adjoins the drive frame 1, is rotated about a horizontal transverse axis Q by means of a hinge assembly (not shown in the drawings) which is known per se. The end of the lever 4 is flexibly connected to a substantially horizontally arranged rod 5 which can be subjected to thrust loads and which is hingedly connected to a roller-type load-bearing member 6. The roller- type loadbearing member 6 is mounted on a load arm 2a of the loadcarrying frame 2. Upon rotation of the lever 4, the rollertype load-carrying member 6 is pivoted and induces parallel 3 lifting of the load-carrying frame 2.
A drive unit 7 is mounted for vertical movement on the drive frame 1 via a parallel linkage mechanism 8 and, preferably, is under spring tension acting in the direction of the ground surface. Furthermore, pivot rollers (not shown in the drawings) are mounted on the drive frame 1 laterally of the drive unit 7.
A second lever 9 is connected with the lever 4 so as to be relatively fixed in rotation and which, therefore, upon rotation of the lever 4 rotates therewith about the horizontal transverse axis Q. A second substantially vertically arranged rod 10, which can be subjected to thrust loads and which is hingedly connected to one end of a toggle lever 11 mounted on the drive frame 1, is articulated to the end of the lever 9. The other end of the toggle lever 11 is connected to a lower link 13 of the parallel linkage mechanism 8 by a third substantially vertically arranged rod 12.
When the load-carrying frame 2 is raised, a force, which is dependent on the load accommodated by the load-carrying frame 2, acts on the drive unit in the direction of the ground surface via the roller-type load- bearing member 6, the rod 5, the levers 4 and 9, the second rod 10, the toggle lever 11 and the third rod 12.
It will be appreciated that the third rod can be connected with an upper link 14 of the parallel linkage mechanism 8 alternatively or additionally to its articulation to the link 13.
4

Claims (4)

1. A lift truck with a drive frame which has a vertically movable drive unit which can be pretensioned in a loaddependent manner in a vertical direction, and has a loadcarrying frame which can be raised relative to the drive frame, wherein as a result of raising the load-carrying frame a lever is rotated about a horizontal transverse axis, which lever is disposed in the region of the load-carrying frame adjoining the drive frame, and wherein a rod is articulated to the end of the lever, which rod is hingedly connected to a pivotable roller-type load-bearing member which is mounted on a load arm connected to the load-carrying frame, characterised in that the rod is operatively connected to the drive unit via a link assembly for generating a substantially vertical force acting in the direction of the ground surface.
2. A lift truck according to Claim 1, wherein a second lever is connected, in a manner precluding relative rotation, to the first mentioned lever or to a component coupled thereto so as to be fixed in rotation therewith, a second rod being articulated to the second lever, which second rod is hingedly connected to one end of a toggle lever which is mounted on the drive frame and the other end of which is coupled to the drive unit.
3. A lift truck according to Claim 2, wherein the drive unit is articulated to the drive frame by a parallel linkage mounting, and the other end of the toggle lever is connected to at least one link of the parallel linkage mounting.
4. A lift truck substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB9519314A 1994-09-26 1995-09-21 Lift truck with a load-dependent pretensionable drive unit Expired - Fee Related GB2293363B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944434327 DE4434327B4 (en) 1994-09-26 1994-09-26 Pallet truck with a load-dependent prestressed drive unit

Publications (3)

Publication Number Publication Date
GB9519314D0 GB9519314D0 (en) 1995-11-22
GB2293363A true GB2293363A (en) 1996-03-27
GB2293363B GB2293363B (en) 1998-02-11

Family

ID=6529198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9519314A Expired - Fee Related GB2293363B (en) 1994-09-26 1995-09-21 Lift truck with a load-dependent pretensionable drive unit

Country Status (3)

Country Link
DE (1) DE4434327B4 (en)
FR (1) FR2724921B1 (en)
GB (1) GB2293363B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1897842A2 (en) * 2006-09-06 2008-03-12 Jungheinrich Aktiengesellschaft Premounting unit for operating an industrial truck
CN105365868A (en) * 2015-11-30 2016-03-02 湖州优创科技有限公司 Solid wood floor timber drying van
FR3101053A1 (en) * 2019-09-20 2021-03-26 Eurial Forklift

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116546A1 (en) * 2001-04-03 2002-10-17 Kreativ Metall Forked lift truck has support elements on free end sections of support arms and on cross web to project into internal space between arms for easier handling of loads
DE10148458A1 (en) * 2001-10-01 2003-04-17 Still Sarl Rotating electrical board

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253778A2 (en) * 1986-07-15 1988-01-20 Automated Container Loading Limited Vehicle for the remote handling of loads
EP0329504A1 (en) * 1988-01-29 1989-08-23 M I C Société Anonyme: Service trolley
GB2285618A (en) * 1994-01-18 1995-07-19 Jungheinrich Ag Lift truck

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126102B (en) * 1957-04-09 1962-03-22 Friedrich Jungheinrich Dr Ing Pallet truck
US3072418A (en) * 1959-04-22 1963-01-08 Steinbock Gmbh Fork lift truck
DE1148056B (en) * 1959-04-23 1963-05-02 Steinbock G M B H Pallet truck
GB1453387A (en) * 1974-12-16 1976-10-20 Miller D M Lifting and loading device for use in combination with a power driven lift truck
SE449482B (en) * 1985-07-08 1987-05-04 Bygg Och Transportekonomie Ab DEVICE FOR OPENING THE BRAKE FORM OF INDUSTRIAL TRUCKS
FI79286C (en) * 1988-01-22 1989-12-11 Rocla Oy Truck.
DE3904798A1 (en) * 1989-02-17 1990-08-30 Wagner Foerdertechnik LIFTING WAGON WITH A DRIVE UNIT PRELOADLY PRESSED IN A VERTICAL DIRECTION
FR2680773B1 (en) * 1991-09-03 1997-09-26 Fenwick Linde Sarl HANDLING CARRIAGE WITH STABILITY INCREASED BY ISOSTATIC DISTRIBUTION OF LOADS.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253778A2 (en) * 1986-07-15 1988-01-20 Automated Container Loading Limited Vehicle for the remote handling of loads
EP0329504A1 (en) * 1988-01-29 1989-08-23 M I C Société Anonyme: Service trolley
GB2285618A (en) * 1994-01-18 1995-07-19 Jungheinrich Ag Lift truck

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1897842A2 (en) * 2006-09-06 2008-03-12 Jungheinrich Aktiengesellschaft Premounting unit for operating an industrial truck
EP1897842A3 (en) * 2006-09-06 2009-05-06 Jungheinrich Aktiengesellschaft Premounting unit for operating an industrial truck
CN101138946B (en) * 2006-09-06 2010-12-08 容海因里希股份公司 Premounting unit for operating an industrial truck
US7854280B2 (en) 2006-09-06 2010-12-21 Jungheinrich Aktiengesellschaft Preassembly unit for the drive of an industrial truck
CN105365868A (en) * 2015-11-30 2016-03-02 湖州优创科技有限公司 Solid wood floor timber drying van
FR3101053A1 (en) * 2019-09-20 2021-03-26 Eurial Forklift

Also Published As

Publication number Publication date
GB9519314D0 (en) 1995-11-22
FR2724921A1 (en) 1996-03-29
GB2293363B (en) 1998-02-11
DE4434327B4 (en) 2005-12-01
FR2724921B1 (en) 1998-02-20
DE4434327A1 (en) 1996-03-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020921