WO2006086941A2

WO2006086941A2 - Lifting column unit for double-column platform lifts for vehicles

Info

Publication number: WO2006086941A2
Application number: PCT/DE2006/000146
Authority: WO
Inventors: Roland Hörnstein
Original assignee: Roland Hörnstein Gmbh & Co.Kg
Priority date: 2005-02-16
Filing date: 2006-02-02
Publication date: 2006-08-24
Also published as: DE102005006920B3; WO2006086941A3

Abstract

The invention relates to a lifting column unit (1) for above-ground platform lifts for vehicles, driven in an electromechanical or electrohydraulic manner. Said unit comprises at least one lifting column (4) that is connected to a floor fixing plate (3) in a fixed manner, and a lifting carriage (8) which is mounted and guided outside on the lifting column profiled element (4), and at least partially surrounds the same, and to which at least part of a load receiving element is applied, by which means the vehicles can be lifted. The inventive lifting column unit also comprises at least one drive element, e.g. a lifting spindle or a hydraulic cylinder, by which means the lifting carriage is moved up and down, and which is arranged outside the lifting column profiled element and parallel thereto.

Description

DESCRIPTION

Lifting column unit for two-post lifts for vehicles

TECHNICAL AREA

The invention relates to a lifting column unit for two-post lifts. This lifting column unit can be equipped with an electro-mechanical or with an electro-hydraulic drive. Two-post lifts will be used for lifting vehicles, for example. These lifting column units are anchored via corridor by means of fastening dowels on the workshop floor. Otherwise, the floor remains undamaged. Foundation work, openings or recesses in the workshop floor are not required.

The vehicles can be lifted by means of a two-post lift different levels to facilitate accessibility below the vehicle. A pit under the vehicle thus does not need to be present.

STATE OF THE ART

Two-post lifts of the type mentioned above are already available in many different designs. They always consist of two lifting column units next to the vehicle. Depending on the design, the lifting column of this lifting column unit usually consists of a polygonal steel profile of approx. 2,300 - 3,800 mm in length. At the lower end of this steel profile is welded to a floor mounting plate. With this steel plate, the lifting column unit is screwed onto the floor. The steel profile of the lifting column is the main backbone of the lifting column unit. There are known single and multi-shell profiles and also those in which reinforcements are welded in a single-shell profile. Furthermore, a distinction is made between open and closed profiles. For open profiles, the pallet truck is guided and stored within the column. With closed profiles, the lift truck encloses the lifting column at least partially and is guided outside the column and stored. The pallet truck, which moves up and down electromechanically or electro-hydraulically within or outside the lifting column, usually has four rotatably mounted and longitudinally extendable support arms which can be swiveled underneath the vehicle. At its end height-adjustable vehicle mountings are arranged, on which the vehicle rests. Instead of support arms can also serve rails or continuous longitudinal or longitudinal and transversely adjustable load receptacles for vehicle reception.

Another characteristic distinguishing feature is the housing of the electric drive motor in electro-mechanically driven lifts. This can be inside or outside the column profile. An executed within the lifting column arrangement is known from European Patent EP 0 816 28 I Bl. This invention relates to a lift for motor vehicles, which consists of at least one lifting column, which has a polygonal profile and the lifting element - is meant the pallet truck - is stored in the column. Within the lifting column and the rotatably mounted lifting spindle is also housed.

The utility model DE 20 2004 019 145 Ul shows a stand lift with an open Hubsäulenprofil in which the lifting spindle and the truck are located inside the Hubsäulenprofils. The driving electric motor is arranged at the upper end of the stand lift and sits partially outside and partially within the Hubsäulenprofils.

The patent GB 2 403 208 A shows a vehicle lift in which the lifting spindle, the lift truck and also the electric motor are arranged outside the lifting column. However, the lifting column is polygonal and not round.

Furthermore, there are already lifting columns of post lifts, which are round. The published patent application DE 198 05 189 A1 shows a round lifting column in sandwich construction. This lifting column has a round shaped body, which has an open profile and the a thin outer and inner shell. The interior space between the outer and inner sheath contains prestressed tension rods made of steel and a pourable, hardenable material, such as concrete or polymer concrete. The static backbone of this design is not a round steel tube. Furthermore, the lifting spindle is located inside the molded body. On the other hand, the electric motor is not arranged in the lifting column, but outside the lifting column.

PRESENTATION OF THE INVENTION

Based on the prior art, the present invention seeks to provide a technically improved Hubsäuleneinheit for two-post lifts with electro-mechanical or electro-hydraulic drive of the type mentioned. This invention is given by the features of the main claim. Other features and advantages will become apparent from the features further specified in the claims and from the following embodiments.

The lifting column unit according to the invention is characterized in that it has a round and closed column profile. This pillar profile can be a seamless or welded steel or precision steel tube. At its lower end, it is firmly connected to a steel plate as Bodenbefestigungsplatte. With this steel plate, the lifting column unit is screwed onto the floor. The steel plate may have an opening in the region of the tube which is sufficiently large that it allows the electric motor to be mounted or a compact hydraulic drive unit to be moved from below into the lifting column profile and fastened to the upper end of the lifting column profile.

According to the accuracy requirements, the Hubsäulenprofil may be unprocessed or machined at its outer diameter. With a longitudinally machined outer diameter, a very accurate diameter and, together with the sliding elements arranged in the lift truck, a very accurate bearing and guidance are produced even with a roughing chip with a large feed. If the outer diameter remains unprocessed, a guide and bearing is created between the lifting column and the pallet truck, which in their accuracy of Guidance and storage in about the known embodiments of polygonal lifting columns and their truck corresponds. According to further quality requirements, eg. As to leadership and running behavior, the Hubsäulenprofil can be painted on its outer diameter either and / or completely or partially surrounded by a permanently attached thin stainless steel sheet.

The one or more stainless steel sheets are attached at least where the or the sliding elements of the lift truck bear and the bearing and executives are removed. The stainless steel sheet can be preformed in such a way that it is rounded. The pre-rounded diameter of the stainless steel sheet is smaller than the machined outer diameter of the column profile, so that the pre-rounded stainless steel sheet after assembling these two parts fitted with a residual stress on the column profile sits.

The stainless steel sheet may have a surface quality which corresponds approximately to the quality of a finely ground surface. The stainless steel sheet as such already represents a sufficient corrosion protection. It requires z. B. no further electrochemical finishing.

The permanent attachment of the stainless steel sheet can be achieved by chemical attachment techniques, such. B. by gluing and / or by mechanical fastening techniques, such. B. rivets or clinching done. If the stainless steel sheet is executed all around, creates a gap at the meeting of the two end faces. This gap can be very small according to the requirements, z. B. be performed less than 1 mm. This gap can be arranged so that it is hidden and not visible. If the gap is visible, it can be closed with adhesive or by adding a metallic and / or non-metallic material which is applied in a viscous or doughy form and then cured. Another possibility is to cover the gap with a kind of tape.

In terms of design, care must be taken to ensure that no storage or guidance takes place at or at the cleavage sites. Be it that the sliding guide is in a different position or excluded at the cleavage point. The outer diameter of the lifting column profile plus The 2-fold wall thickness of the stainless steel sheet, which also has a tolerated thickness, plus possibly 2 times the thickness of the adhesive layer give the outer diameter of Hubsäulenprofils.

In this way, a Hubsäulenprofil with an exact outer diameter within desired and, if necessary, close tolerances, which has a corrosion-resistant surface and excellent surface quality and can be produced with low production costs and costs.

In the version with electro-mechanical drive, the rotatably mounted lifting spindle is located outside of the lifting column profile. It also serves - at least in part - as an external anti-rotation device for the pallet truck.

In the version with electro-hydraulic drive, the hydraulic cylinder unit is located outside of the lifting column profile instead of the lifting spindle. It also serves - at least in part - as an external anti-rotation device for the pallet truck.

The arranged outside the Hubsäulenprofils drive parts - in one case, the mechanical drive technology, in the other case, the hydraulic drive technology - are completely or partially covered by covers. These covers can also be design elements that can determine the optical design of the lifts individually and characteristically.

V O R T E I L E D E R E R F I N D G E

The advantages of the invention are that starting from the prior art, a Hubsäuleneinheit is proposed with electro-mechanical or electro-hydraulic drive, which has a round column profile. This round column profile can be manufactured cost-effectively in the outer diameter, eg in tolerance class 9. For the counterpart, the round sliding surfaces of the lift truck, the same applies. This accuracy between the two sliding partners allows a very short length of the lift truck in the column longitudinal direction and thus the entire lifting column unit. Nevertheless, an exact guide and Storage of the lift truck ensured. Due to the round shape of the lifting column, the inner-round shape of the lift truck and the plain bearings, all occurring forces and load moments are always picked up and removed at right angles and almost completely over the entire load plane. This reduces the pressure and frictional forces and contributes to a quiet running behavior. The round, closed shape of the column profile is very stable and has the same moment of resistance in all stress levels.

For further quality demands can with little manufacturing and cost, eg. B. by whole or partial covering the Hubsäulenprofils with one or more Edelstalilblechen a corrosion-resistant surface with an excellent surface quality can be created.

The Hubsäulenprofil is hollow and despite the compact design of the inner diameter large enough to receive at the upper end in the interior of the electric motor or a compact hydraulic unit. This allows a compact design of the lifting column.

The design carried out: Closed, round lifting column profile, externally guided lifting carriage and lifting spindle or lifting cylinder unit arranged outside the lifting column as an external anti-twist device enables free access to all components, in particular the drive components.

The top and side covers can each be removed in a few steps. Both covers are not just fairings. You can - without having to change the lifting column and the mechanical spindle lifting unit - be customized. This enables a new level of design diversity and, through this possibility of differentiation, opens up a more attractive and better marketing opportunity for different customers.

The truck has a hermetically sealed cavity in which a relatively large amount of lubricant can be accommodated. The sliding surfaces are protected arranged between the scrapers and always lubricated by the sealed lubricant even at long maintenance intervals.

BRIEF DESCRIPTION OF THE DRAWING

The invention will be described in more detail below with reference to the exemplary embodiment of an electromechanically driven two-post lift shown in the drawing and explained. For the electro-hydraulic variant, instead of the electro-mechanical lifting and drive system (lifting spindle / carrying nut and electric motor) equipped with an electro-hydraulic lifting and drive system (lifting cylinder unit and hydraulic unit), the same applies mutatis mutandis. It show for the variant of the electro-mechanical driven Zweisäulenhebühne:

Fig. 1 is a schematic and simplified, not to scale sectional view of the side view of the Hubsäuleneinheit invention with electro-mechanical Spindelhubeinheit without stainless steel paneling

Fig. 2 is a schematic and simplified, not to scale sectional view of the top view of the Hubsäuleneinheit invention with electro-mechanical Spindelhubeinheit without stainless steel paneling

Fig. 3 is a schematic and simplified, not to scale sectional view across the lifting column with a lifting column surrounding the lifting gap up to the longitudinal gap glued stainless steel sheet

Fig. 4 is a schematic and simplified, not to scale sectional view across the lifting column with a plurality of the lifting column only partially surrounding glued stainless steel strips The lifting column according to the invention shown in Fig. 1 and 2 with electro-mechanical Spindelhubeinheit (1) is firmly anchored to the floor (2) with a bottom mounting plate (3). The Hubsäulenprofil (4) is firmly connected to the floor mounting plate (3). The floor mounting plate (3) has within the Hubsäulenprofils (4) has a sufficiently large opening (5), so that the drive unit (6) - in the case of electro-mechanical variant - the electric motor from below into the Hubsäulenprofil (4) and at the top End can be connected to the top plate (7). The lifting column profile (4) is round and closed.

The round shape of the Hubsäulenprofils (4) is ideally suited to store the pallet truck (8) and lead exactly and on the load-bearing support arms (not shown) introduced forces and load moments that are transmitted through the bearings (9) in every possible to remove and absorb in particular eccentric, unfavorable or extremely unilateral acting form. The lift truck (8) is provided at its upper and lower end with sliding guides (10) and each sealed with a seal (11). This results in the interior of the lift truck (8) a the column profile (4) enclosing cavity (12) for storing a lubricant (12a) and can be refilled from the outside via a grease nipple.

With the lift truck (8) on the one hand on the bearing points (9), the support arms (not shown) rotatably connected, on the other hand has the lift truck (8) at the upper end of a training (8a), to which the truck (8) on the support nut ( 13) rests and at the bottom of a training (8b), in which the lifting spindle (14) is guided. The lifting spindle (14) is in the bottom mounting plate radially (3a) and hanging up, z. B. via a bearing housing (15) radially and axially in the top plate (7).

The lifting spindle (14) is arranged parallel to the Hubsäulenprofil (4) and also serves as an external rotation of the lift truck (8). In order to meet the function of the rotation more effectively, the lifting spindle (14) at the upper and lower end of the lift truck (8) in the formations (8a) and (8b) is mounted. The support nut (13) is non-rotatable connected to the truck (8). The below the support nut (13) also rotatably arranged follower nut (16) serves as a safety nut and carries the truck (8) when the support nut (13) fails. The lifting spindle (14) is connected at its upper end with a pulley (17). A drive belt (18) connects the pulley (17) and the motor shaft (19) and transmits the rotational speed and the torque of the electric motor (6) according to the gear ratio on the lifting spindle (14). Rotating in one direction of rotation, the support nut (13) raises the lift truck, rotating in the other direction of rotation, the support nut lowers. The lift truck (8) follows in the lowering of the support nut, at least due to the intrinsic and traffic loads.

The rotating parts are covered by an upper cover (20) fixed to the top plate (7). The side cover (21) shown only in Fig. 2, which is fixed to the top plate (7) and the bottom mounting plate (3) covers areas of the lift truck (8), the lifting spindle (14), carrying nut (13), follower (16) and other parts, such. As electric cables and the like. Both covers (20) and (21) are not only covers that perform a protective function, but at the same time design elements over which the appearance of the lifting column with mechanical Spindelhubeinheit (1) can be determined individually and characteristically.

According to the respective requirements, the round Hubsäulenprofil (4) on its outer diameter (22) unprocessed or machined longitudinally and have a precise and tolerated outer diameter (22). The surface can be painted or see FIGS. 3 and 4 with a single (23) or with a plurality of stainless steel sheets (24) and (25), which may have a different width, up to at least a single longitudinal gap (26) completely or partially clad be. The only stainless steel sheet (23) or the stainless steel sheets (24) and (25) are preferably arranged at the locations where the Hubsäulenprofil (4), the bearing and management forces, which are introduced by the truck (8) receives.

The or the stainless steel sheets (23) and (24) have a high surface quality, so that they represent a suitable sliding and guiding surface. The or the stainless steel sheets (23) or (24) are permanently fixed to the lifting column profile (4). This can be achieved by chemical attachment techniques such. B. by gluing and / or by mechanical fastening techniques, such. B. rivets or clinching done. If it is done by gluing on the Hubsäulenprofϊl (4) before joining with the stainless steel sheets (23) or (24) applied an adhesive (26). After joining Hubsäulenprofil (4) and the single stainless steel sheet (23) creates a small longitudinal gap (25). Excess adhesive (26) can escape from this longitudinal gap (25). Furthermore, this longitudinal gap (25) can be filled with adhesive (26) or another filler (27) of non-metallic or metallic viscous or doughy material.

ELEVATIO N S T A T IO N S E S T E Lifting column with mechanical spindle lifting unit Floor Floor mounting plate a Lower spindle guide in the floor mounting plate Lifting column profile Opening in the floor mounting plate Drive unit, e. B. Electric motor or hydraulic unit Top plate Lifting truck a Training at the upper end of the lift truck Training at the lower end of the lift truck Bearing for bearing arms 0 Sliding guides 1 Seal 2 Cavity 2a Lubricant 3 Carrier nut 4 Lifting spindle 5 Bearing housing 6 Follower nut 7 Pulley 8 Belt 9 Motor shaft 0 Upper cover 1 Lateral cover 2 Outer diameter of lifting column profile 3 single stainless steel sheet 4 several stainless steel sheets, if necessary with different width 5 longitudinal gap 6 adhesive 7 Filler made of non-metallic or metallic material

Claims

1. Lifting column unit (1) for overhead lifts for vehicles, which is driven by electro-mechanical or electro-hydraulic,

- With at least one lifting column (4) which is firmly connected to a floor mounting plate (3),

- With a lift truck (8) which is mounted and guided on the outside of Hubsäulenprofil (4) and the Hubsäulenprofil (4) at least partially surrounds and on which at least a portion of a load bearing is mounted, can be raised with the vehicles,

- With at least one drive member, for. B. lifting spindle or hydraulic cylinder through which the lift truck is moved up and down, which is arranged outside the Hubsäulenprofils and parallel to this, characterized in that

- The Hubsäulenprofϊl (4) consists of a tube or a tube-like column which is at least outside round, hollow inside and closed all around and the drive unit (6), electric motor or hydraulic unit, arranged within the Hubsäulenprofils (4) and at the upper end of the Hubsäulenprofüs (4) is installed.

2. Hubsäuleneinheit (1) for above-floor lifts to spoke 1, characterized in that

- This Hubsäulenprofil (4) on the outside a (23) or more stainless steel sheets (24), which surround the Hubsäulenprofil (4) in whole or in part.

3. lifting column unit (1) for above-floor lifts according to one of the preceding claims, characterized in that the lifting truck (8) in its interior has a Hubsäulenprofil (4) surrounding cavity (12) with lubricant, the top and bottom by seals (11) is sealed.

4. Lifting column unit (1) for overhead conveyors according to one of the preceding claims, characterized in that the lifting spindle (14) secures the lifting carriage (8) against rotation on the Hubsäulenprofil.