EP2409943A1 - Teleskop-Hubvorrichtung mit Zahnrad- und Zahngestänge-Antrieb - Google Patents

Teleskop-Hubvorrichtung mit Zahnrad- und Zahngestänge-Antrieb Download PDF

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Publication number
EP2409943A1
EP2409943A1 EP10007497A EP10007497A EP2409943A1 EP 2409943 A1 EP2409943 A1 EP 2409943A1 EP 10007497 A EP10007497 A EP 10007497A EP 10007497 A EP10007497 A EP 10007497A EP 2409943 A1 EP2409943 A1 EP 2409943A1
Authority
EP
European Patent Office
Prior art keywords
rack
module
section
locking
pinion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10007497A
Other languages
English (en)
French (fr)
Other versions
EP2409943B1 (de
Inventor
François-Xavier Guyard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TALBOT LIFTING & SECURITY EUROPE LIMITED
Original Assignee
Talbot Industrie Decoupage Emboutissage
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Talbot Industrie Decoupage Emboutissage filed Critical Talbot Industrie Decoupage Emboutissage
Priority to ES10007497.0T priority Critical patent/ES2469869T3/es
Priority to EP20100007497 priority patent/EP2409943B1/de
Priority to US13/356,866 priority patent/US8840087B2/en
Publication of EP2409943A1 publication Critical patent/EP2409943A1/de
Application granted granted Critical
Publication of EP2409943B1 publication Critical patent/EP2409943B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/02—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with racks actuated by pinions

Definitions

  • the present invention relates to the design and construction of a rack-and-pinion type telescopic lifting apparatus.
  • a rack-and-pinion type telescopic lifting apparatus Such a device makes it possible to move a load vertically over a few meters. It comprises a telescopic mast that can be equipped as needed, at the base of a fixed or mobile base system and in the upper part of any system for fixing or handling the load.
  • Telescopic masts which comprise modules sliding vertically on each other and in which the movement of an upper module relative to a lower module is obtained by means of one or more cables connecting the modules to each other.
  • a traction force exerted on the crank of a winch which is fixed outside the lower module, at the base of the device, and to which is connected the end of one of the cables, ensures the deployment of the device and allows the vertical displacement of the load attached to the upper module.
  • the aim of the invention is to avoid these drawbacks by means of a telescopic mast lifting device in which, to control the movement of an upper module element with respect to a lower module element, a mechanical drive system is available.
  • direct rack and pinion, motion transmission between a crank rotatably mounted in the lower element of the referenced module, or fixed base module, and a rack integral with the element of the upper module being provided, in a conventional manner, by a gear train with a rotary gear co-operating with the tooth of the rack.
  • the present invention provides to protect the lifting mechanism by a non-return locking device whose implementation is automatically controlled during training development telescopic mast by friction coupling with a gear of the gear train ensuring the transmission of movement of the mounted crank accessible from the outside on the lower element to the rack secured to the upper element.
  • the lifting device according to the invention thus involves a drive mechanism whose performance is advantageous and which is particularly safe in its operation.
  • non-return drive locking device which may advantageously comprise a friction brake inspired by those described for a winch in the published patent document.
  • EP 2058266 and in the European patent application filed under the number 09 010459.7 one and other citing the same inventor as the present European patent application and filed in the name of a company related to the applicant company. It may be referred to in case of need to facilitate the understanding of the description of the figures which will follow.
  • the hoisting apparatus in its preferred embodiments for implementation industrially, present other characteristics that relate to the constitution of the rack equipping the upper module of the telescopic stage.
  • the rack is advantageously made of several parts, succeeding one another longitudinally or stacking transversely, which assemble in mounted position in the upper module of the telescopic stage by self-locking relative to each other mutually and together with respect to said module.
  • the rack is thus formed of superimposed layers of cut sheet metal, the final thickness of the multi-layer rack being equivalent to the width of the groove formed by the profile of the corresponding module. (upper module of the telescopic stage) to the effect of a self-locking assembly.
  • the invention thus has the advantage of leading to a light material realization, both for the rack and the profiled tube in which it is mounted. Furthermore, the multi-layer embodiment allows the rack to resist buckling even though it has to cash in the large forces that are due in particular to the friction coupling of the rack drive system with a blocking system opposing inadvertent return during operation when lifting charge.
  • the design according to the invention also has the advantage of facilitating a simple and inexpensive manufacture.
  • the lifting device comprises a telescopic mast 2 adapted to deploy under the action of a crank 4 which is attached to the mast and which is associated with a gear reduction device 6 for the drive of a rack 8 secured to a module of the mast, said module then moving telescopically with respect to the base of the mast.
  • the drive of the rack by the action on the crank allows the movement of the module which is associated with the rack, upwards or downwards depending on whether it is desired to go up or down the telescopic system, which eliminates the use of a winch and a cable and which gives the system reliability and safety in all circumstances, the drive device being coupled with a friction brake system which ensures the passive locking of the load in its position without the operator being obliged to provide an effort in opposition to the descent of this load.
  • the telescopic mast consists of two profiled modules 11 and 12, as can be seen on the Figures 1 to 3 the second module sliding inside the first basic module.
  • the base module 11 carries the drive and gearing mechanism associated with the crank and the brake system
  • the sliding module 12 carries the rack adapted to cooperate with a pinion of the drive system.
  • the base module is formed by a profiled tube, preferably aluminum so that the entire mast has a weight allowing its movement on a work area.
  • a base 14 may be provided for the stabilization of the mast and is then fixed on the base module.
  • the tube is formed of two side walls 16 facing one another and a rear wall 18 which connects the rear ends of the side walls transversely. It is observed that the front face of the tube is open so that the tube has a substantially U-shaped section.
  • a cover 20 can be fixed to close and secure the profile on its open part.
  • a central core 22 extends transversely inside the tube parallel to the rear wall between the two side walls.
  • the central core thus defines two zones, a housing zone of the drive mechanism 24 which will be located on the open side of the tube, and a guide zone of the sliding module 26.
  • the guide zone comprises stiffening walls and leaves free a guide corridor of equivalent section to the section of the second module.
  • a notch 28 is formed in the central core to provide communication between the housing area of the drive mechanism and the guide channel of the sliding module.
  • the gear drive and gear mechanism 6 has a set of two-axis gears which extend into the housing area between the side walls of the tube.
  • a first axis forms a primary shaft 30 and carries mainly a driving gear 32, a spring 34 and a ratchet wheel 36.
  • This primary shaft is rotatably mounted on bearings 38 set in the side walls.
  • One end of the first axis is integral with the crank.
  • a second axis forms a secondary shaft 40, which extends parallel to the primary shaft.
  • the secondary shaft mainly carries a driven pinion 42, which is engaged with the drive gear, and a rack pinion 44 which is positioned so that a portion of this pinion passes through the notch achieved in the central soul.
  • a third axis 46 is mounted between the side walls of the tube and carries a safety pawl 48, which is positioned in engagement with the ratchet wheel of the primary shaft. The operation of this mechanical safety device will be described later.
  • the sliding module 12 is formed by a profiled tube, preferably aluminum so that the entire mast has a weight allowing its movement on a work area.
  • the profiled tube forming the sliding module comprises a central compartment 50, a rear compartment 52 and a receiving groove of the rack 54. It will be understood that in the case of a two-module mast embodiment, the central and rear compartments remain empty. and will eventually be used for fixing the load at the end of the sliding module. In the case of a non shown where the number of sliding modules of the telescopic mast is greater than two, these compartments are intended to receive a sliding module and a strap for the deployment of this additional module.
  • the groove in the upper module serves as a receiving groove for the rack which is automatically trapped there. In a nonlimiting manner in the embodiment described here as an example, it is carried out on one side of the module sliding between a side wall 56 and a wall defining the central compartment and the rear compartment. This groove extends over the entire width of the sliding module and an intermediate wall 58 is disposed vertically in this groove. Grooves 60 are formed in the intermediate wall to allow the passage of protruding portions of the rack to be accommodated in the groove.
  • the basic module is equipped in its upper part with a protective cover 62 which also integrates a guide function of the module. It follows the inner walls of the area receiving the second module. It is equipped with self-locking clips so that when the second module is in place, the room is captive.
  • the second module is equipped at its lower end, intended to remain in operation in the volume of the first module, a not shown part covering the outer walls and guiding the second module inside the first module.
  • the basic module is equipped with a guiding device of the second module to facilitate movement and limit friction between each module.
  • a pinion gear reduction system is connected to the crank which is fixed or removable, so as to be in direct contact with the rack secured to the profile and drive it in displacement.
  • the gear reduction system consists of sprockets and rotating axles. The number, size and positioning of these can vary and are defined according to the load, speed and effort required.
  • the action on the crank for lifting the load rotates the driving pinion 32 mounted on the primary shaft and which is in direct contact with the driven pinion 42 mounted on the secondary shaft.
  • this action on the crank in a direction of rotation shown on the figure 3 by the arrow F1, generates the rotation of the secondary shaft and the rack pinion 44 which is integral, and therefore the rise of the rack and the sliding module on which the rack is fixed. It is observed that in the direction of rotation along the arrow F1, the shape of the ratchet wheel engaged with the safety pawl does not prevent rotation of the primary shaft.
  • All reduction and braking systems are integrated directly into the basic module. It will be understood that they may however be positioned projecting therefrom and be housed in a box attached to the base module.
  • the system allows the rotation of a rack pinion which passes through the central core of the profiled tube and which cooperates with the teeth of the rack of the sliding module for the displacement of this module.
  • the driving device is frictionally coupled to a self-locking drive locking system 64 so that the load is permanently maintained whether or not there is action on the crank on the part of the operator.
  • the ratchet wheel is used here as a typical example of a cam disk. It is mounted free to rotate on the primary shaft, between two friction rings 65 (visible in particular on the figure 4 ) integral with this tree. Under the effect of a lateral force, in the axis of the primary shaft and directed to the crank, the friction rings are pressed radially against the cam disc and all three parts is secured by friction. The cam disk is then rotatably connected to the primary shaft, and the locking system is coupled by this friction with the drive device.
  • the lateral force for securing the ratchet wheel with the friction rings is obtained either by a displacement of the pinion driving along the primary shaft in the direction of the ratchet wheel, or by the action of a spring mounted in compression around the primary shaft and tending to press the drive gear against the ratchet wheel.
  • the drive gear has an internal thread 66 and is mounted cooperatively on a threaded portion 68 of the primary shaft.
  • the orientation of the threads is such that when the primary shaft is rotated clockwise to deploy the telescopic assembly by raising the upper element (arrow F1 on the figure 3 ), the pinion tends to move axially towards the crank and therefore to the ratchet wheel.
  • the primary shaft is rotated in the opposite direction to the needles of a watch.
  • the effect of the spring with that of the driving pinion which is pushed towards the friction rings, secures the ratchet wheel to the friction rings and makes the ratchet wheel integral with the rotation of the primary shaft.
  • the shape of the teeth of this wheel allows the rotation of the shaft by releasing each time the ratchet.
  • the primary shaft For moving the sliding module in the direction of approaching the base module, the primary shaft is rotated in the clockwise direction.
  • the direction of the threads made on the primary shaft and inside the driving pinion forces this pinion to move towards the spring.
  • the ratchet wheel is disengaged in rotation relative to the primary shaft since the friction rings are not pressed against said wheel, so that the ratchet wheel does not oppose the rotation of the shaft and the retraction of the sliding module.
  • the operator must provide a torque on the crank sufficiently strong that the drive gear can move against the biasing force of the spring.
  • the rack of the particular mode of implementation chosen to best illustrate the invention consists of a vertical and transverse stack of standard parts.
  • the rack is formed of three blades 76 side by side forming a set.
  • the number of blades bonded to form a section may vary. The number of blades can thus differ according to the desired final thickness for the rack.
  • Each blade of the same section of rack has an identical shape.
  • the blades For the upper section and for the intermediate section, the blades have a generally rectangular sectional shape with a toothed side 78, the shape of the teeth being made to cooperate with the drive pinion of the drive system.
  • the opposite side of the toothed side has a straight edge 80 and projecting hooks, with a first upper hook 82 and a second intermediate hook 84 at mid-height of the blade.
  • the upper side of the blade has a notch 86, which forms with the upper hook, a U-shaped notch, while the lower side of the blade has indexing tabs 88.
  • the blades have shapes identical to the blade shape previously described, except that the lower part is not toothed.
  • This lower section thus comprises a non-toothed portion 90, which forms a stop during the deployment of the sliding module and prevents, in a position of abutment visible on the figure 2a , all of said sliding module out of the volume of the basic module.
  • the blades forming this lower section further comprise a bore passing through the thickness of the blade.
  • the blades are made by cutting into a sheet metal strip.
  • standard parts of complex shape are obtained inexpensively, under identical cutting profiles, as well for producing the tabs and notches as for producing the teeth.
  • the blades of each rack section are locked against each other, in respective positions that automatically match the tabs and mounting notches , as well as the teeth on the toothing side.
  • the rack mounts in the receiving groove as follows.
  • the upper rack section is slid into the groove.
  • the upper and middle hooks of this section are passed through the grooves and the rack section is placed in the bottom of the groove so that the straight edge of the section bears against the intermediate wall of the groove.
  • the upper section is then raised upwards until the U-shaped notch comes into abutment against the intermediate wall, as can be seen in particular on the figure 6 .
  • the upper section is maintained in this vertical position, and the intermediate section is slid into the groove, in the same way as previously cooperating the hooks of the rack and the grooves of the profiled module.
  • the intermediate section is raised upwards until the U-shaped notch comes into abutment against the intermediate wall. In this position, the indexing tab located in the lower part of the upper rack section is locked in position between the intermediate wall and the U-shaped notch of the intermediate section. The intermediate section is then maintained in this vertical position, the upper section being self-locking with the intermediate section and the walls of the groove. Lastly, the lower section is slid and the same procedure as before is carried out so that the notch of the lower section co-operates with the indexing tab of the intermediate section. The vertical stacking of the rack sections is then locked by fixing a screw 92 passing through the lower rack section and the walls of the profile so that all parts are captive in the groove.
  • each rack section Due to the self-locking assembly of each rack section with its direct neighbor and the complementary use of a screw for holding the lower section in position, the rack is blocked as a whole in the two opposite directions by translation. It is also locked in the third direction, transversely to the translation direction, inter alia by maintaining the blades which constitute it in each section between the side walls of the receiving groove, whose width is substantially equal to the total thickness of the boards glued together.
  • the lower rack section forms an abutment zone thus constituting a mechanical limit switch.
  • This stop limits the deployment of the mast beyond the defined height. And it is particularly advantageous that this stop is here obtained without adding an additional mechanical part to perform this function.
  • the rack is here advantageously made by a stack of standard shapes which has the advantage of simplifying the manufacture and not having too heavy rack, which would be complicated to manufacture and which would be particularly detrimental to the efforts to provide for the uprising a charge.
  • the multi-layer realization of bonded blades also allows it to present good characteristics of resistance to effort and stress despite its lightness.
EP20100007497 2010-07-20 2010-07-20 Teleskop-Hubvorrichtung mit Zahnrad- und Zahngestänge-Antrieb Active EP2409943B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES10007497.0T ES2469869T3 (es) 2010-07-20 2010-07-20 Dispositivo telescópico de elevación con arrastre por pi��n y cremallera
EP20100007497 EP2409943B1 (de) 2010-07-20 2010-07-20 Teleskop-Hubvorrichtung mit Zahnrad- und Zahngestänge-Antrieb
US13/356,866 US8840087B2 (en) 2010-07-20 2012-01-24 Telescopic rack-and-pinion lifting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100007497 EP2409943B1 (de) 2010-07-20 2010-07-20 Teleskop-Hubvorrichtung mit Zahnrad- und Zahngestänge-Antrieb

Publications (2)

Publication Number Publication Date
EP2409943A1 true EP2409943A1 (de) 2012-01-25
EP2409943B1 EP2409943B1 (de) 2014-03-12

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EP20100007497 Active EP2409943B1 (de) 2010-07-20 2010-07-20 Teleskop-Hubvorrichtung mit Zahnrad- und Zahngestänge-Antrieb

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US (1) US8840087B2 (de)
EP (1) EP2409943B1 (de)
ES (1) ES2469869T3 (de)

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CN105382144A (zh) * 2015-12-28 2016-03-09 汪涛 一种带有可视窗口的电缆切断装置
CN105382142A (zh) * 2015-12-28 2016-03-09 汪涛 一种带有限位开关和可视窗口的电缆切断装置
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EP2058268A1 (de) 2006-08-17 2009-05-13 Tsao, Kuo-hsiang Bremsvorrichtung mit planaren reibflächen für elektrische winde und elektrische winde

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CN103449328A (zh) * 2013-09-04 2013-12-18 清华大学 一种手动便携抬升装置
CN103449328B (zh) * 2013-09-04 2016-04-20 清华大学 一种手动便携抬升装置
CN105363970A (zh) * 2015-12-28 2016-03-02 汪涛 一种带有可视窗口且可防滑的电缆切断装置
CN105382145A (zh) * 2015-12-28 2016-03-09 汪涛 一种可导屑的电缆切断装置
CN105382141A (zh) * 2015-12-28 2016-03-09 汪涛 一种带有滚轮且可导屑的电缆切断装置
CN105382144A (zh) * 2015-12-28 2016-03-09 汪涛 一种带有可视窗口的电缆切断装置
CN105382142A (zh) * 2015-12-28 2016-03-09 汪涛 一种带有限位开关和可视窗口的电缆切断装置
CN108706492A (zh) * 2018-07-04 2018-10-26 奇瑞汽车股份有限公司 一种抓地能力强的千斤顶
CN111317423A (zh) * 2018-12-14 2020-06-23 佛山市顺德区美的洗涤电器制造有限公司 升降装置和家用电器
CN110950257A (zh) * 2019-11-15 2020-04-03 嘉善广翔电器制造有限公司 一种用于起吊机械设备的钢丝收放装置

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US20120181490A1 (en) 2012-07-19
EP2409943B1 (de) 2014-03-12
US8840087B2 (en) 2014-09-23

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