DE202020106662U1 - Industrial truck with attachment - Google Patents

Abstract

Industrial truck with a base body (2) and at least one attachment (5) that can be pivoted relative to this about an axis of rotation (6), the attachment being mounted on the base body (2) along the axis of rotation (6), so that the attachment (5) in at least one folded-up position and one folded-down position can be pivoted, the attachment (5) being independently movable from the folded-up position or an intermediate position into the folded-down position by the action of gravity, characterized in that a rotary damper (8) is positioned between the attachment (5) and the base body (2) is arranged such that a movement of the add-on part (5) caused by the action of gravity can be damped and/or slowed down.

Description

The innovation relates to an industrial truck with an attachment according to the preamble of claim 1.

Such industrial trucks are known for example from DE102005035790A1 , which discloses a load-carrying device for a vehicle, the load-carrying device comprising a foldable fork that can be folded up and fixed in the folded-up position by means of a socket pin.

The document US8979099B1 discloses a lift truck with foldable forks, which can also be fixed in the folded-up position.

A disadvantage of such industrial trucks with foldable forks is that after releasing the fixation or before the forks are fixed in the folded up position, the risk of injury from unintentional folding down or due to lack of care when lowering because of the often heavy weight of the forks is very high. In addition, the fixation of the load forks can sometimes only be solved together, such as in the 5 the US8979099B1 shown. If, moreover, the folded-up position is close to the vertical tilting position, it is very easy for the second fork to move inadvertently when the first fork is being lowered and to fall down in an uncontrolled manner. Because of the length of the fork, the tip of the same reaches a high speed, so that the risk of injury and damage caused by a fork falling in an uncontrolled manner is considerable.

Other components on the truck that can cause injury and damage if they fall down uncontrollably include battery flaps, which can trap fingers and hands.

The object of the present innovation is to create an industrial truck with an attachment in which the risk of injury from attachments falling in an uncontrolled manner is reduced.

According to the innovation, this object is achieved for an industrial truck with a base body and an attachment in that a rotary damper is arranged between the attachment and the base body in such a way that a movement of the attachment caused by the effect of gravity can be damped and/or slowed down. In this way, if the attachment is inadvertently moved or the operator is distracted while handling the attachment, the risk of injury and the risk of damage to the attachment can be minimized. The rotary damper absorbs the torque caused by the mass of the attachment and prevents the attachment from falling down in an uncontrolled manner. Instead, the attachment lowers to the lowered position in a slow, controlled movement. The arrangement of the rotary damper between the attachment and the base body does not mean a geometric position or position, but rather an arrangement such that the flow of force between the attachment and the base body takes place via the rotary damper, which means that the torque exerted by the weight of the attachment is absorbed and the movement dampened can cause. The word "between" thus refers here to an arrangement in relation to the power flow, whereby a corresponding geometric arrangement of the rotary damper between the add-on part and the base body is not to be ruled out.

Depending on the arrangement of the attachment on the industrial truck, gravity can cause the attachment to move directly from its folded-up position or it must first be brought into an intermediate position, e.g. into the vertical position or beyond, before gravity causes it to move independently movement sets.

Provision is preferably made for the rotary damper to be fastened directly to the attachment and the base body. For example, the rotary damper can have a housing ring that is attached to the attachment and a pin that is rotatable relative to the housing ring and that is attached to the base body, or vice versa. The damping takes place in a manner known per se with a relative rotation of the pin and the housing of the rotary damper. Such rotary dampers are known from the prior art.

Alternatively, it can be provided that a component that mediates the flow of force, in particular a bearing shaft, is arranged between the rotary damper and the add-on part and/or between the rotary damper and the base body. Depending on the arrangement, the bearing shaft can transfer the torque caused by the mass of the add-on part to the rotary damper or from the rotary damper to the base body. Other intermediary components such as adapter pieces or the like are conceivable.

Provision is made for the gravity-induced movement of the add-on part to take place from a folded-up position or an intermediate position. Is the attachment leaning against the truck in the folded up position or on fixed in any other way, a movement caused solely by gravity into the folded-down position from the folded-up position is not possible. To do this, the fixation must first be released or the attachment must be brought into an intermediate position. In this case, the movement takes place from the folded-up position via the at least one intermediate position into the folded-down position. This can be done intentionally by the operator or unintentionally, for example when driving over a bump. When the attachment is moved to the intermediate position, in this position gravity causes the attachment to move in the direction of the folded-down position. The intermediate position can be, for example, the upright position or any position between an upright position and the folded-down position.

The angle between the intermediate position, in particular the vertical position, and the folded-up position is preferably less than 30°, measured from the folded-up position in the direction of the folded-down position. For example, in the case of foldable load forks, it can be provided that these are folded up beyond the vertical position and lean against the base body of the industrial truck in the folded up position and are not readily set in motion by gravity in this position. However, there is at least one intermediate position in which the attachment is set in motion solely by the effect of gravity. This can be the vertical position, for example. The innovation is particularly beneficial for add-on parts that have a large mass and therefore exert a large torque on the rotary damper. It is therefore preferably provided that the torque absorbed by the rotary damper is greater than 50 Nm, in particular greater than 100 Nm.

Since the add-on parts preferably have a large mass, pivoting from the folded-down position into the folded-up position can be strenuous. In this case, it is preferably provided that the force to be applied for pivoting into the folded-up position can be reduced by means of an auxiliary device, or the add-on part can be pivoted automatically into the folded-up position. The auxiliary device can in particular comprise a cable winch. The cable winch can be actuated by a motor or permanently spring-loaded and can pivot the attachment either automatically or only be designed to support the pivoting process

The add-on part can preferably be designed as a folding fork. More preferably, the folding fork has a U-shaped profile and encloses a fork of the industrial truck in its folded-down position.

In an advantageous embodiment, the folding fork has a recess for engaging the auxiliary device. For example, a cable winch is arranged as an auxiliary device on the base body and is connected to a crossbar that has hook-like formations that engage in recesses in the folding fork.

The industrial truck preferably has a battery compartment and the attachment is designed as a battery flap.

• 1 ein neuerungsgemäßes Flurförderzeug mit Klappgabeln im heruntergeklappten Zustand,
• 2 ein neuerungsgemäßes Flurförderzeug mit Klappgabeln im hochgeklappten Zustand und
• 3 eine Schemazeichnung eines neuerungsgemäßen Wirkprinzips einer Klappgabel.

Further advantageous configurations result from the figures and the description of the figures. show here

• 1 a modern industrial truck with folding forks folded down,
• 2 a modern industrial truck with folding forks in the folded up state and
• 3 a schematic drawing of an innovation according to the principle of action of a folding fork.

An industrial truck designed as a low-lift truck 1 is in 1 shown with a base body 2, which accommodates a travel drive, a lifting device and an energy store in a manner known per se and not shown in detail. The base body can consist of a drive part 3 and a load part 4, which can be moved in height relative to one another. In this case, the load part preferably also accommodates the energy store of the industrial truck, for example in the form of a lithium-ion battery. A tiller 5 is also arranged on the drive part of the vehicle for steering the industrial truck and controlling its functions, in particular the traction drive and the lifting drive. Folding forks 5 are used to hold load carriers, which can be pallets in particular. The folding forks are pivotable about a geometric axis 6 on the vehicle. For this purpose, each of the folding forks is mounted in the respective area of the connection 7 by means of an axle component and is thus pivotably connected to the base body of the industrial truck 1 . A rotary damper 8 is arranged on both sides along the axis 6 in the outer area of the industrial truck, which is connected on the one hand to the base body 2 and on the other hand to the respective folding fork 5 . For example, a housing rim of the rotary damper 8 can be connected to the folding fork 7 and the rotary damper 8 can also have a rotatable pin which is connected to the base body 2 with a force fit or a form fit, for example. This connection can be made in the area of connection 7 take place, in addition, in the region of the connection 7, an axle component mounted there can run, which ends on both sides of the connection 7 in a tab 9 of the folding fork, in which the axle component is also mounted. While the folding fork is supported by an axle component that runs through the connection 7 and ends on both sides in brackets 9 of the folding fork 5, the rotary damper 8 absorbs the torque exerted by gravity during a rotary movement of the respective folding fork 5 and limits it in this way the speed of a rotary movement of the folding fork 5.

Recesses 10 in the folding forks 5 allow an auxiliary device 11 to be hooked on. The cable 15 of a cable winch 13 is fastened to the center of the crossbar. The cable winch 13 can be motor-operated or permanently spring-loaded and the folding forks 5 either pivot automatically or are only designed to support the pivoting process, so that the driver of the industrial truck raises the folding forks 5 using the cable winch 13 manually. Storage boxes 14 are also arranged on the side of the base body. These are located in front of the rotary dampers 8 in the direction of travel and thus prevent the rotary dampers 8 protruding laterally beyond the base body 2 from being sheared off in the event of a collision.

The industrial truck 1 with the folding forks 5 folded up is in 2 shown. The folding cables 5 have a U-shaped profile and, when folded down, enclose the forks 21 of the basic device, shown here without load wheels. Also shown are the hooks 22 of the crossbar 12, which fix the folding forks 5 in the folded-up position. It is also easy to see that the folding forks 5 are longer than the forks 21 of the basic truck and therefore have more space to accommodate load carriers, and that folding up the folding forks 5 saves space and makes the truck easier to maneuver when unloaded cares.

3 shows the schematic arrangement of the folding forks 5 on the truck and the rotary expression. When folded down, the folding forks 5 enclose the forks 21 with the load rollers 31. The folding forks 5 are mounted in the area of the brackets 9. An axle component is provided for this purpose, which runs along the axis 6 and is attached to the base body 2 of the industrial truck 1 in the area of the Connection 7 is stored. This enables the folding fork to be pivoted about the axis 6 relative to the base body of the industrial truck. In addition, a rotary damper 8 for damping the rotational speed of the folding fork 5 is provided. The rotary damper 8 is attached to the cap fork 5 in the area of the lug 9, for example by means of a screw connection. For this, an in 3 not shown housing ring of the rotary damper 8 can be provided with corresponding through holes. The rotary damper is also attached to the connection 7 by means of a pin 32; this can be done, for example, by means of a form fit, so that the rotary damper 8 can absorb the torque caused by the weight of the folding fork during the folding process.

Reference List

1

industrial truck

2

body

3

drive part

4

load part

5

folding fork

6

axis of rotation

7

connection

8th

rotary damper

9

tab

10

recess

11

auxiliary device

12

crossbar

13

winch

14

storage boxes

21

fork

22

hook

31

load roller

32

cones

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102005035790 A1 [0002]
• US 8979099 B1 [0003, 0004]

Claims (11)

Industrial truck with a base body (2) and at least one attachment (5) that can be pivoted relative to this about an axis of rotation (6), the attachment being mounted on the base body (2) along the axis of rotation (6), so that the attachment (5) in at least one folded-up position and one folded-down position can be pivoted, the attachment (5) being independently movable from the folded-up position or an intermediate position into the folded-down position by the action of gravity, characterized in that a rotary damper (8) is positioned between the attachment (5) and the base body (2) is arranged such that a movement of the add-on part (5) caused by the action of gravity can be damped and/or slowed down. industrial truck claim 1 , characterized in that the rotary damper (8) is attached directly to the attachment (5) and the base body (2). industrial truck claim 1 , characterized in that between the rotary damper (8) and the attachment (5) and/or between the rotary damper (8) and the base body (2), a component that mediates the flow of force, in particular a bearing shaft, is arranged. Industrial truck according to one of the preceding claims, characterized in that the angle between the intermediate position, in particular the vertical position, and the folded-up position is less than 30°, measured from the folded-up position in the direction of the folded-down position. industrial truck claim 1 or 2 , characterized in that the torque absorbed by the rotary damper (8) is greater than 50 Nm, in particular greater than 100 Nm. Industrial truck according to one of the preceding claims, characterized in that the force required for pivoting into the folded-up position can be reduced by means of an auxiliary device (11) or the add-on part (5) can be pivoted automatically into the folded-up position. industrial truck claim 4 , characterized in that the auxiliary device (11) comprises a cable winch (13). Industrial truck according to one of the preceding claims, characterized in that the add-on part (5) is designed as a folding fork. industrial truck claim 8 , characterized in that the folding fork has a U-shaped profile and in its folded-down position encloses a fork (21) of the industrial truck. industrial truck claim 8 , characterized in that the folding fork (5) has a recess (10) for engagement of the auxiliary device (11). industrial truck claim 1 - 7 characterized in that the industrial truck has a battery compartment and the attachment is designed as a battery flap.

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