DE2340719A1 - Fork lift truck with two steerable wheels - has one side of each wheel in same vertical plane as steering axle - Google Patents

Abstract

The rotational axis for each wheel passes through the limbs of an inverted U-shaped mounting which turns about the vertical steering axle aided by an intermediary friction- or ball-bearing. Each wheel is positioned at one end of its rotational axis by means of a distance piece. The steering axle for each wheel is formed by a bolt, screw or rivet which passes through the ring mounting which is fixed non-rotatably to the vehicle body, and through the roller bearing and U-shaped mounting. A threaded nut on the base of the steering axle holds the assembly together by way of support washer and a further friction- or ball-bearing.

Description

Bielefeld kitchen machine and transport equipment factories vom B r a u c k e GmbH, 48 Bielefeld-Schildesche

Meierfeld 14

"Plurfaufzeug, in particular Pallet stacker "

The invention relates to a floor conveyor, in particular a maneuverable fork lift truck, with at least two castors each steerable around an upright (vertical) axis.

In the industrial trucks that have become known in various designs the steerable wheels are mounted in a mostly fork-shaped housing, which is located below a turntable,

509807/0244

so that in the housing u. Space for a pest holder (Clamping device) remains.

The wheels are either freely movable (steering stabilization through caster - wheel contact point is behind the steering axle -) or are linked via a corresponding linkage.

In any case, lies with the previously known versions the steering axis above the steerable roller on the roller bisector, so that when steering (pivoting the roller) when the PlurfOrder machine is at a standstill, What is often the case with pallet stackers and the like, a drilling rubbing (erasing) of the rollers with the roadway arises because the rollers can still roll during the pivoting process due to the arrangement of the steering axles - thereby creates a high swivel resistance and a force-consuming To steer.

The object of the invention is to provide an industrial truck, in particular a pallet stacker truck, according to the type mentioned improve and with a low swivel resistance with the road even when the vehicle is at a standstill when steering equipped with steerable castors.

The castor steering bearing should be simple and cost-saving and should require little effort during the steering process require and offer the possibility of supporting the locking devices available for normal swivel castors.

Furthermore, the castor steering bearing should also be used in the event of excessive Steering angle give the truck good stability.

509807 / 02U - 3 -

According to the invention is in a floor vehicle, in particular Pallet stacker truck, according to the type mentioned at the beginning, each steerable roller with its tread bisecting the width outside the lowerable steering axis arranged.

In a preferred embodiment, the vertical Steering axis with a peripheral edge of the roller in a common vertical plane.

It is also preferred that the two steerable rollers arranged in a common edge area of the industrial truck to be provided laterally offset towards the center of the vehicle in relation to its steering axis.

Further features of the invention emerge from the other subclaims.

The scope of protection of the subject matter of the invention extends not only to the features of the individual claims, but rather also on their combination.

The industrial truck (pallet stacker) according to the invention is Equipped with advantageously steerable rollers, which when steering when the vehicle is at a standstill around the outside Their tread-width bisector lying and thus eccentrically arranged steering axis can roll what a results in a strong reduction in the swivel resistance between the roller and the roadway, thereby enabling energy-saving steering .

The steerable rollers are in a simple catfish on the pallet stacker kept steerable.

509807/02 kU

The offset towards the center of the vehicle is also advantageous Arrangement of the two steerable rollers - they lie with their width bisecting between the two Steering axles, which increases the stability of the vehicle in the event of excessive steering, since the tilting edge is more advantageous Wise shifted outwards and thus has a stabilizing effect.

The steerable rollers (wheels) are indeed via a linkage Forcibly guided or articulated with one another, however, the castor principle remains, which is a fork-shaped Housing under a slewing ring as opposed to the one-sided stub axle mounting, granted; this swivel castor principle enables standard wheel brakes to be attached.

An exemplary embodiment of the invention is shown in the drawing. Show it :

Fig. 1 is a side view of an industrial truck (Pallet stacker) with arranged on the chassis, fixed and steerable Rollers,

Fig. 2 is a front view of the chassis with rollers steerable around an upright axis, those with their bisector outside the steering axis in a bearing fork are rotatably held, partially cut.

An industrial truck according to the invention, in particular one that can be moved manually Pallet stacker truck, has two fixed and two around one upright (vertical) on a chassis Axis 11 steerable rollers (wheels) 12, 13, the steerable rollers 13 with their width bisector (Tread bisector) lie outside the upright steering axis 11.

509807/02 4 4

In a preferred manner, a roller edge (an edge of the running surface) 13a lies with the vertical steering axis 11 in a common vertical plane.

Each steerable roller 13 is about an axis 14 directed transversely (horizontally) to the steering axis 11 for driving the industrial truck rotatably mounted in a bearing fork (swivel housing) 15 and this bearing fork 15 is above the steering axis 11 with the interposition of sliding and / or roller bearings 16 with the chassis 10 in a connection, these Fork 15 with roller 13 is held on the chassis 10 so as to be rotatable about the axis 11 by 360 °.

The steering axis 11 extends on the bisector of the fork 15 above the steering roller 13 and the steering roller 13 is rotatably mounted about the axis of rotation IiJ outside the fork width bisector; it is advantageous to use the swivel castor 13 laterally offset with respect to the steering axis 11 by a spacer 17, such as a spacer sleeve, in the longitudinal direction of the axis of rotation to be determined in terms of location.

The bearing fork 15 is designed as a thrust bearing 16 through the steering axis 11 on a turntable 18 for The steering is rotatably supported and the turntable 18 is connected to the chassis 10 via fastening means 19, such as screws non-rotatable connection.

Formed by a screw, a bolt, a rivet or the like The steering axis 11 extends through the turntable 18, the roller bearing 16 and the bearing fork 15 in their web area from above and represents a lying against the underside of the fork bridge 15 a Plain and / or roller bearing 20 with an abutment disk and a holding means 22, preferably a nut, a rotatable and releasable connection between the bearing fork 15 and the chassis 10 ago.

■ - 6 509807/0244

In a preferred manner, the two steerable rollers 11, which are arranged at a distance from one another in an end region of the chassis, are arranged offset (FIG. 2).

On the bearing fork 15 can be arranged in each case a not shown roller lock.

The two steerable rollers 13 of the chassis 10 are rigidly connected to one another for steering via a connecting rod 23 engaging their bearing forks 15 and to which Linkage 23 engages a steering and pull rod 24.

Due to the laterally offset arrangement of the steerable rollers 13 with respect to its steering axis 11, the rollers also roll when the truck is being steered at a standstill 13 on the roadway (standing area), as it is about the steering axis lying outside of the width bisecting its tread 11 move around - this means that less effort is required to steer when the vehicle is at a standstill, and it becomes a rubbing (erasing) between the roller and the road surface with the rollers lying in a vertical plane with their tread bisecting the width of the steering axis prevents the high swivel resistance from being switched off as well.

The further inward, that is to say in the direction of the center of the vehicle, rollers 13 have the advantage that when extreme (critical) turning of the rollers 13, the tilting edge is shifted outward and not inward, so that a high level of stability of the industrial truck is achieved.

- 7 509807 / 02U

Claims (1)

Claims Ij industrial truck, in particular pallet stacker, with ^s at least two castors each steerable around an upright (vertical) axis, characterized in that each steerable castor is arranged with its width bisector (tread-width bisector) outside the vertical steering axis. 2. Industrial truck according to claim 1, characterized in that the steering axis (11) with a roller Ranäkante (13a) is arranged in a common vertical plane. 3. Industrial truck according to claim 1 and 2, characterized in that that one on the steering axis (11) with a chassis (10) with the interposition of a sliding and / or Rolling bearing (16) rotatably connected bearing fork (15) a transversely (horizontally) to the steering axis (11) directed axis of rotation (14) holds around which the steerable roller (13) in the longitudinal direction of the axis of rotation outside of the fork width bisector - laterally offset - fixed in terms of position, preferably is fixed in position by a spacer (17). M. industrial truck according to claims 1 to 3, characterized in that that the roller bearing fork (15) through the steering axis (11) via a designed as a thrust bearing Rolling bearing (16) is rotatably connected to a fixed, non-rotatable turntable (18) on the chassis (10). 509807/0244 Industrial truck according to Claims 1 to 4, characterized in that that the steering axis (11) od a bolt, a screw, a rivet. The like. Is formed and from above the turntable (18), the roller bearing (16) and the bearing fork (15) grips in their web area and a retaining means (22), preferably a nut, arranged on the steering axis (11) below the fork web (15a), and a sliding and / or roller bearing (20) resting against the fork web (15a), the bearing fork (15) with the on Chassis (10) attached turntable (18) connects. 6. Industrial truck according to claims 1 to 5, characterized in that that the two rollers arranged at a distance from one another in a chassis end region (13) are arranged laterally offset towards the center of the vehicle with respect to their steering axis (11). 5 o 9 8 o 7 / o 2 ku