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
  • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
  • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
  • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
• • 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
  • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
  • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
  • B66F7/0641—Single levers, e.g. parallel links

Definitions

• the invention relates to a flat lifting platform with a lifting plate which is articulated to a lifting arm pivotally supported on the base frame, the lifting arm being pivotable about an articulation axis on the base frame via a drive engaging the lifting arm and the drive also being connected via a handlebar a pivot point above the pivot axis of the lifting arm on the base frame is connected to the lifting arm, which is higher than the point of attack of the drive on the handlebar when the lifting arm is in the retracted position.
• Lifting platforms which are to be designed in such a way that when the platform or lifting plate is in the retracted position there are no parts projecting upward above the cubic plate are known, for example, from WO 89/11437 or WO 89/11438.
• These known devices are movable devices with which a motor vehicle can be raised by a predetermined stroke, for example for changing a tire.
• the known constructions require a relatively large drive if loads are to be lifted out of the extended position of the drive. With devices of this type, a load is usually only gripped and lifted after a predetermined stroke.
• Another lifting platform makes it possible to lift a platform with scissors using hydraulic cylinder-piston units which are arranged essentially parallel to a floor level.
• scissor lifts of this type the introduction of force in a first phase of the extension movement is relatively unfavorable, so that a relatively high overall height is required in order to be able to lift loads even from the retracted position.
• the aim of the invention is now to create a flat lift of the type mentioned at the outset, in which large loads can be safely lifted away from the fully retracted position with a considerably lower overall height and smaller drive units.
• the flat design is intended in particular to enable a lifting platform of this type to be retrofitted in floor constructions or ceiling constructions of a workshop, without the need for reinforcement of the floor or ceiling, and without openings in the floor or Ceiling are required to create the space required for the drive units.
• the lifting platform essentially consists in that the handlebar is designed as a two-armed pivotable lever in the manner of a toggle lever, the pivot axis of which lies between the free ends of the two-armed lever and can be pivoted in the height direction on the base frame via at least one other link is supported.
• the drive is connected to the lift arm via a link with a linkage above the pivot axis of the lifting arm on the base frame, a kind of toggle lever is formed, with a first when the drive is extended under the toggle action of this link Partial pivoting of the lifting arm is made.
• the translation of the toggle lever allows a much smaller drive and thus a flatter construction if the drive is to be accommodated in the base frame and under the lifting plate.
• the drive acts on the handlebar on the lifting arm below the articulation point of the handlebar and in that the same drive acts on the lifting arm with its other end,
• the drive can preferably be driven by a hydraulic cylinder piston
• This articulation point can, however, also be guided in an elongated hole parallel to the floor level or secured against rising by stops.
• the design is now such that the handlebar is designed as a two-armed pivotable lever, the pivot axis of which is pivotally supported on the base frame in the height direction by at least one further link.
• the handlebar is designed as a two-armed pivotable lever, the pivot axis of which is pivotally supported on the base frame in the height direction by at least one further link.
• 30 is sufficient if the lower end of the handlebar is slidably guided in the base frame in order to achieve the desired toggle action.
• the toggle action and operational safety can be significantly improved by a pivotable articulation, the advantageous translation of the toggle mechanism being effective over a longer pivoting path of the lifting arm in that at least one further link is pivotally supported on the base frame in the vertical direction.
• the design is advantageously made such that the lifting plate is connected to a link parallel to the lifting arm and is guided parallel to the floor level.
• the design is advantageously made such that the articulation point of the two-armed lever is in the retracted position of the lifting plate above the articulation point for the attack of the hydraulic Zylinderkolben ⁇ aggregates. In this way, kinematics are ensured.
• a particularly compact design can be achieved by the fact that the handlebar (s) for supporting the two-armed lever is (are) articulated on the base frame coaxially to the pivot axis of the parallelogram handlebar of the lifting plate.
• FIG. 1 shows a side view of the lifting platform with the side wall removed in the retracted position of the lifting plate and in the end position; 2 shows an analog representation with the lifting plate half raised and FIG. 3 shows a plan view of the representation of FIG. 1 at a point below the lifting plate.
• Fig. 1, 1 is a handlebar designed as a two-armed lever, which acts as a toggle lever.
• Handlebar 1 is pivotally attached to the base frame via two further links 2, the pivot axis being designated by 3.
• a hydraulic cylinder piston unit 5 is pivoted about a pivot axis 4, the other free end of which engages on a lifting arm 7 such that it can pivot about a pivot axis 6.
• the lifting arm 7 is attached to the base frame so that it can pivot about the axis 8.
• the second free end of the two-armed lever 1 engages on the lifting arm 7 via an articulation point 9.
• a link 10 can also be seen, which together with the lifting arm 7 results in a parallel guidance of the lifting plate 11, the parallelogram links 7 and 10 being connected to the lifting plate 11 via the pivot axes 12 and 13. The links 7 and 10 thus guide the lifting plate 11 parallel to the plane of the base frame.
• FIG. 3 shows that the articulation axis 3 of the link 2 essentially coincides with the articulation axis of the parallelogram link 10.
• REPLACEMENT BLA ⁇ (RULE 26) falls, whereby a particularly compact design is achieved.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Geology (AREA)
• Mechanical Engineering (AREA)
• Structural Engineering (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Jib Cranes (AREA)
• Transmission Devices (AREA)
• Liquid Crystal Substances (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=3516923

Family Applications (1)

Country Status (10)

Families Citing this family (12)

Family Cites Families (9)

• 1994
  • 1994-08-10 JP JP7506319A patent/JPH08506560A/ja active Pending
  • 1994-08-10 US US08/406,968 patent/US5613575A/en not_active Expired - Fee Related
  • 1994-08-10 CA CA002145880A patent/CA2145880A1/fr not_active Abandoned
  • 1994-08-10 AT AT94922348T patent/ATE176656T1/de not_active IP Right Cessation
  • 1994-08-10 EP EP94922348A patent/EP0664767B1/fr not_active Expired - Lifetime
  • 1994-08-10 DE DE59407806T patent/DE59407806D1/de not_active Expired - Fee Related
  • 1994-08-10 KR KR1019950701363A patent/KR950703484A/ko not_active Withdrawn
  • 1994-08-10 WO PCT/IB1994/000253 patent/WO1995004698A1/fr not_active Ceased
  • 1994-08-10 CN CN94190585A patent/CN1113383A/zh active Pending
  • 1994-11-11 TW TW083110437A patent/TW284742B/zh active

Non-Patent Citations (1)

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