DE7616061U1 - LIFTING DEVICE - Google Patents

Description

The innovation relates to a lifting device with a liftable and lowerable upper part / a Lower part, at least one pair of scissor arms, the between the upper part and the lower part for parallel guidance of the upper part when specifying and Lowering is arranged, one arm of the pair of scissors arms hinged at one end to the lower part is and is at its other end with the upper part in retaining engagement, while the other Scissor arm is hinged at one end to the upper part and at its other end from the lower part As well as with at least one pair of symmetrically arranged ones for maneuvering the upper part serving lifting devices that act in opposite directions and with their one end arranged on one scissor arm or in the vicinity of its ends and together so are designed that they act with their other ends on a swing arm attached to the pivot axis of the Scissor arms stored and firmly connected to the other scissor arm.

In a known embodiment of the type mentioned (e.g. DE-OS 18 05 941) scissor arms are provided, which are angled at their ends and vcn those of the one near its ends console-like Carries approaches to which one ends of the lifting devices are hinged; besides, these are Console-like approaches still connected to one another by an additionally provided pull rod. Included this known embodiment in cross section

equally sized scissor arms have the end kinks and some of the console-like approaches and also an additional pull rod
is provided on one of the scissor arms, results
a relatively complex and bulky one

Lifting device.

The task of the innovation is to provide a lifting device | of the type mentioned at the beginning, which is | characterized by their structural simplicity. |

■ I

According to the invention, this object is achieved by ';'

that the |

a scissor arm has a much slimmer con- | '

structure as the · solid with the swing _n

^arm connected other scissor arm. |

This training in accordance with the innovation is possible because '

the scissor arm connected to the lifting devices is essentially only exposed to a tensile force

while the other scissor arm, the one with the \

Swing arm is connected, also bending stress- |

so that the former see- «■ a much slimmer construction

can be called the last-mentioned scissor arm. This $

f. brings considerable advantages in terms of con- |

construction and costs. |

In the following, the innovation is based on one in the; Drawing illustrated embodiment
a lifting device described, the drawing only a schematic representation of the innovation
reproduces. M.

The lifting device contains an upper part consisting of a frame 1 and a lower part, which consists of a base frame 2. Between these two frames 1 and 2 are two pairs of scissor arms 5, 8 (only one pair is illustrated) for guiding the liftable and lowerable Frame 1 arranged by means of a pair or more pairs of lifting devices 3, 4 can be raised. In a preferred embodiment, the lifting devices 3, IQ hydraulic cylinder; however, it goes without saying also possible to use compressed air cylinders or just mechanical lifting devices, for example lifting devices that have screw threads.

One end 6 of a scissor arm 5 in each pair of scissors arms is hinged to the base frame 2 and is at its other end 7 with the frame 1 in engagement to support this, and that via a roller that can roll on a roller rail that extends along the frame 1. One end 9 of the other arm 8 of each pair of scissor arms is articulated on the frame 1 arranged and is supported at its other end 10 by the floor frame 2, via a roller, which can roll along a roller rail, which extends along the floor frame 2. Rolls with an identical positional arrangement on the two scissor arms can be on common shafts be attached, which extend between the pair of scissor arms.

According to the innovation, the lifting devices 3, 4 have a connection at one of their ends the scissor arm 5 (at its ends 6 and 7), while its other ends at the opposite Ends of a swing arm 12 are articulated, j 5 on the pivot axis 11 of the scissor arms 5, 8

is stored; this swing arm is firmly connected to a scissor arm 8. The swing arms 12, which are combined with the two pairs of scissor arms are connected to one another by means of a shaft, which in this case is designated by 11 and extends between the pair of scissor arms.

• · 0 ·· ■ ·· ti

In a non-illustrated embodiment, the cylinders are the hydraulic jack-5 facilities 3.4 not at the ends 6, 7 of the

Scissor arms 5, but arranged at a small distance from these ends.

In each pair of scissor arms, the arm 5, the lifting devices 3, 4 and the swing arm 12 form one Unit in which the scissor arm 5 is generally only exposed to tensile stress. Therefore, the scissor arm 5 received a considerably slimmer construction than the other scissor arm 8, the bending stress is exposed. The difference in dimensions between arms 5 and 8 is shown in the drawing illustrated.

The above statements are for description and illustration only, without representing a Represent limitation. Further variations and modifications are of course within the scope of the invention possible.

Claims (2)

Ans 3627 1 protection claims: 1. Lifting device, with a liftable and lowerable upper part, a lower part, at least one pair of scissors arms, which is arranged between the upper part and the lower part for parallel guidance of the upper part during its raising and lowering, one arm of the pair of scissors arms being hinged at one end to the lower part and with its other end is in holding engagement with the upper part, while the other scissor arm is hinged at one end to the upper part and is supported at its other end by the lower part, as well as with at least one pair of symmetrically arranged lifting devices serving to maneuver the upper part, which act in opposite directions and arranged with their one ends on one scissor arm or in the vicinity of its ends and are designed together so that they act with their other ends on a swing arm which is mounted on the pivot axis of the scissor arms and fixed to the the other scissor arm is connected,
characterized, that the one scissor arm (5) connected to the lifting devices (3, 4) is a much slimmer one Has construction than the other scissor arm (8) firmly connected to the swing arm (12). 2. Lifting device according to claim 1, characterized in that the lifting devices are hydraulic cylinders or compressed air cylinders.