WO2014188031A1 - Appareil d'élévation de charge avec élément roulant rotatif intermédiaire relié élastiquement au corps principal de l'outil de levage - Google Patents

Appareil d'élévation de charge avec élément roulant rotatif intermédiaire relié élastiquement au corps principal de l'outil de levage Download PDF

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Publication number
WO2014188031A1
WO2014188031A1 PCT/ES2014/070354 ES2014070354W WO2014188031A1 WO 2014188031 A1 WO2014188031 A1 WO 2014188031A1 ES 2014070354 W ES2014070354 W ES 2014070354W WO 2014188031 A1 WO2014188031 A1 WO 2014188031A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling element
main body
rolling elements
intermediate rotating
jack
Prior art date
Application number
PCT/ES2014/070354
Other languages
English (en)
Spanish (es)
Inventor
Antonio Martinez Martinez
Original Assignee
Melchor Gabilondo, S.A.
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 Melchor Gabilondo, S.A. filed Critical Melchor Gabilondo, S.A.
Priority to EP14801403.8A priority Critical patent/EP3000767A4/fr
Publication of WO2014188031A1 publication Critical patent/WO2014188031A1/fr

Links

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
    • B66F5/00—Mobile jacks of the garage type mounted on wheels or rollers
    • B66F5/04—Mobile jacks of the garage type mounted on wheels or rollers with fluid-pressure-operated lifting gear
    • 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
    • B66F5/00—Mobile jacks of the garage type mounted on wheels or rollers
    • 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
    • B66F7/0625—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement with wheels for moving around the floor

Definitions

  • the invention relates to load lifting apparatus, for example a truck jack of the type of those assisting in the lifting of vehicles or other objects of high weight.
  • load lifting apparatuses In the state of the art, very diverse load lifting apparatuses are known, to allow the lifting of objects of high weight, for example of vehicles. Some devices of this type are the jacks (truck, bottle, etc.) that lift the load by pushing it from below, and the cranes, which raise the load by pulling it from above. Occasionally, load lifting devices include wheels to move relative to the ground.
  • a wheelbarrow jack generally comprises a main body, with respect to which some type of lifting element is disposed mobile that, duly acted by means of a hydraulic system or similar, is capable of lifting exerting sufficient force under the vehicle or heavy object to cause its elevation
  • lifting elements are an articulated lifting arm, a telescopic mechanism capable of extending vertically or inclined, and in any case with a vertical component facing up, etc.
  • the truck jack comprises drive means so that the user can cause the hydraulic system or the like to act and the consequent rise of the lifting element.
  • the jack comprises drive means for allow the controlled descent of the lifting element, said descent having to be carried out in a controlled manner since generally the lifting element is lowered in load, that is, while supporting the weight of the vehicle, and therefore to ensure safety it is vital to avoid imbalances , overturns or falls.
  • Known wheelbarrow jacks are capable of moving by wheels, rollers or other rolling elements comprised in the main body. Since the main body is generally very close to the ground and has a relatively reduced height, the cats usually comprise a lever that projects from the main body up to provide the user with a grip area to pull or on which push to move the cat from side to side, or to turn the car.
  • the jack has two swivel wheels in its rear area (area closest to the lever and therefore to the user) and two fixed wheels in its front area .
  • Another known solution is that the jack also has an additional fixed wheel placed on a lifting element in the form of a folding arm, where said additional fixed wheel only rests on the ground when the arm is not raised. In this case, when the ascent of the lifting element occurs, the additional fixed wheel is raised together with said lifting element and the jack is then supported on the two remaining fixed wheels and on the two rotating wheels. On the other hand, if the lifting element is not raised, the fixed wheel rests on the ground.
  • Wheelbarrow jacks are devices that can have a fairly high weight. For example, a cat capable of lifting 2 tons it can weigh approximately 45 kg; A cat capable of lifting 6 tons can weigh 81 kg.
  • the invention has as a particular objective the design of a wheelbarrow jack that simplifies and facilitates the realization of turns thereof, reducing the effort that the user must make. This is intended to improve the maneuverability of the cat to facilitate its positioning, for example to facilitate the user the action of positioning the cat properly with respect to the vehicle before proceeding to lift it.
  • the aim of the invention is to achieve a load lifting apparatus that, being provided with wheels or rolling elements to move along the ground, has improved maneuverability with respect to conventional rolling load lifting devices.
  • the object of the invention is a load lifting apparatus, comprising a main body with respect to which a lifting element is capable of ascending or descending to lift a heavy object, wherein said lifting element comprises a force apiicator capable of exerting an ascending force on the object.
  • the body The main one can rest and move on a floor by means of rolling elements.
  • the apparatus according to the invention has the particularity that it comprises at least one rear rolling element, located in a rear area of the user-operated apparatus for maneuvering with the apparatus; at least one front rolling element, located in a front zone of the apparatus closer to the force applicator than the rear zone; and an intermediate rotating rolling element.
  • the intermediate rotating rolling element is connected to the main body by an elastic element.
  • Said elastic element tends to cause a separation of the intermediate rotating rolling element with respect to the main body until all the rolling elements (front, rear and intermediate rotating) are not in the same plane.
  • said elastic element is capable of deforming until the rolling elements become in the same plane.
  • the intermediate rotating rolling element is located between the rear zone and the front zone. Also according to the invention, the proportion of mass of the apparatus distributed between the intermediate rotating rolling element and the rear rolling element is greater than the proportion of distributed mass between the intermediate rotating rolling element and the front rolling element. That is, the center of gravity is behind the intermediate rotating rolling element.
  • the apparatus according to the invention operates as follows. In the absence of a load, that is, by not exerting a force on the force applicator of the apparatus on the object, the elastic element separates the intermediate rotating rolling element sufficiently that the rolling elements of the apparatus are not in the same plane. Consequently, as a consequence of the position of the center of gravity and the action of the force of gravity, the rear rolling elements and the intermediate rotating rolling element are supported on the ground, the front rolling elements remaining in the air. On the other hand, in a load situation, in which the lifting element is exerting an ascending force on a heavy object and consequently receiving the corresponding reaction force of the heavy object, the elastic element is sufficiently loosed so that all rolling elements happen to be in the same plane and therefore the front rolling elements rest on the ground.
  • the apparatus according to the invention has the following advantages.
  • the fact of having an intermediate rotating rolling element closer to the rear area of the apparatus (zone operated by the user to maneuver with the apparatus) than the front rolling elements added to the fact that in the absence of loading the front rolling elements do not rest on the ground, it allows the device to be equipped with great maneuverability.
  • Maneuverability means that the rotation of the front area of the apparatus is maximized, where the force squeezer or area of the lifting element that pushes the heavy object is generally located, for the same angle of rotation of the rear area of the apparatus, where there is the operating lever or other actuation means operated by the user.
  • Figure 1 shows a perspective view of an embodiment of an apparatus according to the invention, in this case in the form of a wheelbarrow jack.
  • FIG. 2 shows a side view of the cat of Figure 1 in an unloading or resting situation.
  • FIG. 3 shows a front view in enlarged section, in accordance with section plane A-A illustrated in Figure 2.
  • Figure 4 shows a side view of the cat of Figure 1 under load.
  • FIG. 5 shows a front view in enlarged section, in accordance with section plane B-B illustrated in Figure 4.
  • FIG. 1 shows a perspective view of an embodiment of a load lifting apparatus according to the invention.
  • the load lifting apparatus is a jack (1) of the type known as a truck jack.
  • the jack (1) comprises a main body (2) with respect to which it is capable of ascending or descending a lifting element (3) intended to exert a force on a heavy object to produce the elevation of the same and also intended to support the heavy object during the descent operation thereof.
  • the lifting element (3) is a lifting arm capable of folding with respect to the main body (2), as indicated by an arrow (4).
  • the lifting element (3) has a force apiicator (5) at its end, said force apiicator (5) being precisely the area in charge of exerting the ascending force on the object to produce its elevation.
  • the force squeezer (5) is a flat circular surface intended to come into contact with the bottom of a vehicle or with a lower surface of the object to be raised.
  • the cat (1) has been represented resting on a floor (6).
  • the main body (2) can move with respect to said floor (6) by means of various rolling elements. More concretely, and! jack (1) comprises at least one rear rolling element (7) located in a rear area (8) of the jack (1).
  • the rear area (8) of the jack (1) is the area that is user-operated to maneuver with the jack (1), specifically acting on a handle (9a) of a drive lever (9), in this particular case , the jack (1) comprises two rear rolling elements (7) in the form of fixed wheels, that is, two rear wheels whose axis of rotation does not change direction.
  • the jack (1) comprises at least one front rolling element (10) located in a front area (1 1) of the apparatus closer to the force applicator (5) than the rear area (8).
  • the front rolling element (10) is a single cylinder or roller that is fixed, that is, whose axis of rotation does not change direction.
  • the jack (1) also comprises an intermediate rotating rolling element (12).
  • the intermediate rotating rolling element (12) is a wheel that is capable of rotating on itself along a central axis of rotation (13) to be able to roll with respect to the ground (6).
  • the intermediate rotating rolling element (12) is also capable of rotating also with respect to a vertical axis of rotation (14), causing the axis of rotation (13) to have a variable direction.
  • the intermediate rotating rolling element (12) is elastically fixed to the main body (2) allowing said elastic connection that the vertical position of the intermediate rotating rolling element (12) can vary. By elastic connection it is understood that the intermediate rotating rolling element (12) is fixed to the main body (2) by means of an elastic element (18).
  • the proportion of mass of the jack (1) distributed between the intermediate rotating rolling element (12) and the rear rolling elements (7) is greater than the proportion of distributed mass between the intermediate rotating rolling element ( 12) and the front rolling element (10). That is, the center of gravity of the jack (1), in the absence of load, is located behind the intermediate rotating rolling element (12), between the intermediate rotating rolling element (12) and the rear area (8) of the jack (1). ).
  • FIG. 2 A schematic side view of the jack (1) of Figure 1 is shown in Figure 2 in a situation in which the lifting element (3) is find down against e! main body! (2) and in which the jack (1) is devoid of charge, that is, it is not exerting a force on an object.
  • the lowest points of the rolling elements (7, 1, 1, 12) are not in the same plane, but the lowest point of the intermediate rotating rolling element (12) is below of an imaginary plane (15) that joins the lowest points of the rear rolling elements (7) and the front rolling element (10).
  • Figure 3 shows a front sectional view of the jack (1) of the previous figure, in which it is clearly seen that the intermediate rotating rolling element (12) is fixed to the main body (2) by means of an elastic element (16), which in this case has the form of a strap that extends between two inner walls (2a, 2b) of the main body (2).
  • the intermediate rotating rolling element (12) is fixed to the central area of said strap and is capable of varying its height depending on the deformation of the strap.
  • Figure 4 shows the jack (1) of Figure 2 in a load situation, that is, in a situation in which the lifting element (3) is exerting a force on a heavy object (17), schematically represented as a irregular polygon, and consequently the object (17) exerts a reaction force (F) on the lifting element (3).
  • the lifting element (3) is shown in its lowest position, even if it has not started to turn upwards as indicated by the arrow (4).
  • the reaction force (F) on the lifting element (3) is transferred to the main body (2), by be the lifting element (3) fixed to it.
  • the reaction force (F) applied on the main body (2) causes the main body (2) to descend with respect to the intermediate rotating rolling element (12) while the elastic element (16) is flexed.
  • the elastic element (16) flexes sufficiently so that the front rolling element (10) rests on the ground, as can be seen in the figure.
  • the front rolling element (10) starts to support the weight of the object (17), the intermediate rotating rolling element (12) not having to support it, which has a lower capacity to support weight by the Made of being rotating.
  • Figure 5 shows a front sectional view of the jack (1) of the previous figure, in which it is clearly seen that the elastic element (16) has been deformed allowing the descent of the main body (2) with respect to the rolling element intermediate swivel (12) that is resting on the floor (6).
  • the elastic element (16) is configured so that it exerts an elastic force that tends to cause the intermediate rotating rolling element (12) to descend with respect to the main body (2) until the lowest points of the rolling elements (7 , 10, 12) are not found are not in the same plane. That is, it tends to return the jack (1) to the rest situation of Figure 2, in which the lowest point of the intermediate rotating rolling element (12) rests on the ground while the lowest point of the rolling element Front (10) is in the air. Therefore, in the absence of load, the jack (1) automatically returns to said resting situation.
  • Figures 6, 7 and 8 show schematic top views of two cats known in the state of the art and of the cat (1) according to the invention represented in the previous figures, in order to illustrate the improvement in maneuverability achieved in the cat of the present invention.
  • Figure 8 shows a conventional jack (100) equipped with two rear wheels (107) rotating in its rear area (108), two front wheels (1 10) fixed in its front area (1 1 1), and a lever drive (109) located in its rear area (108).
  • a lever drive (109) located in its rear area (108).
  • the turning point (150) of this first conventional jack is between the fixed and equidistant front wheels (1 10), in front of the force applicator (105) (jack zone (1) intended to exercise the force on the object to be raised).
  • the handle (109a) of the operating lever (109) an arc (A1) as illustrated in the figure, the rotation of the practically zero front area (1 1 1) is caused, and a rotation of the very small force applicator (105), indicated by the arc (B1). That is, the user must rotate the rear area (108) of the jack (100) enormously to achieve a very small rotation of the front area (1 1 1) and the force applicator (105), thus requiring a great effort.
  • Figure 7 shows another conventional jack (200), in this case equipped with two rear wheels (207) rotating in its rear area (208), two front wheels (210) fixed in its front area (21 1) and a fixed wheel intermediate (212).
  • the intermediate fixed wheel (212) because it is fixed, serves as the turning point (250) of the jack. Therefore, a turning arc (A2) similar to the turning arc (A1) of the previous figure causes the force applicator (205) to rotate an arc (B2) larger than the arc (B1) of the previous figure.
  • FIG. 8 shows the jack according to the invention, provided with two rear wheels or rolling elements (7) in its rear area (8), a roller or front rolling element (10) in its front area (1 1) and an intermediate rotating wheel or rolling element (12).
  • the front rolling element (10) is not supported on the ground whereby the pivot point (50) of the jack is in the area of the rolling elements rear (7) for being these fixed and for being rotating the intermediate rotating rolling element (12), specifically, the turning point (50) is located between the rear rolling elements (7) and equidistant from them, very close to the lever drive (9).
  • the actuation lever (9) is represented in a more advanced position compared to the actuation levers (109, 209) of the two previous figures, but if its handle had been represented in the same way it would be positioned in the point represented in the present figure.
  • the elastic element (16) is a strap connected to the main body (2) and to which the intermediate rotating rolling element (12) is fixed.
  • the elastic element (16) can be a spring or a shock absorber connected to the main body (2) and to which the intermediate rotating rolling element (12) is fixed.
  • Other embodiments in this regard are not ruled out.
  • the intermediate rotating rolling element (12) is approximately in the center of the main body, seen said body in plan.
  • the intermediate rotating rolling element (12) according to the invention can be found at other points of the main body (2) away a certain distance from the center and located between the rear rolling elements (7) and the rolling elements front (10).
  • both the front rolling elements and the rear rolling elements can be fixed - as in the embodiment represented in the figures - or rotating.
  • Fixed means that its axis of rotation does not change direction.
  • Rotary means that its axis of rotation can change direction.
  • the rear rolling elements are fixed, as in the embodiment of the figures, has certain advantages that can be seen in the jack (1) of the figures.
  • the resulting cat (1) may be narrower.
  • the rear rolling elements (7) can be large and consequently cause the jack (1) to be much more pleasant and easy to handle.
  • the force applicator (5) is a flat circular surface intended to come into contact with the bottoms of a vehicle or with a lower surface of the object to be raised.
  • the invention contemplates different force applicators, capable of pushing the object or load upwards (for example, a shaft of a piston) or capable of pulling the object from above (for example, a hook or a claw).

Abstract

L'invention concerne un appareil d'élévation de charge comprenant un corps principal (2), lequel comporte au moins un élément roulant arrière (7) situé au niveau d'une zone arrière (8) de l'appareil, actionnable par l'utilisateur pour manoeuvrer avec l'appareil ; au moins un élément roulant avant (10) situé au niveau d'une zone avant (11) de l'appareil plus proche de l'applicateur de force (5) que la zone arrière (8) ; un élément roulant rotatif intermédiaire (12) situé entre la zone arrière (8) et la zone avant (11) de l'appareil et relié élastiquement au corps principal (2), le centre de gravité de l'appareil étant disposé à l'arrière de l'élément roulant rotatif intermédiaire (12), de sorte que, en situation de charge, tous les éléments roulants (7, 10, 12) appuient sur le sol, et qu'en situation de décharge, les éléments roulants avant (10) n'appuient pas, ce qui améliore la maniabilité de l'appareil.
PCT/ES2014/070354 2013-05-20 2014-04-23 Appareil d'élévation de charge avec élément roulant rotatif intermédiaire relié élastiquement au corps principal de l'outil de levage WO2014188031A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14801403.8A EP3000767A4 (fr) 2013-05-20 2014-04-23 Appareil d'élévation de charge avec élément roulant rotatif intermédiaire relié élastiquement au corps principal de l'outil de levage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201300468 2013-05-20
ES201300468A ES2531423B1 (es) 2013-05-20 2013-05-20 Aparato de elevación de carga con elemento rodante giratorio intermedio conectado elásticamente al cuerpo principal del gato

Publications (1)

Publication Number Publication Date
WO2014188031A1 true WO2014188031A1 (fr) 2014-11-27

Family

ID=51932992

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2014/070354 WO2014188031A1 (fr) 2013-05-20 2014-04-23 Appareil d'élévation de charge avec élément roulant rotatif intermédiaire relié élastiquement au corps principal de l'outil de levage

Country Status (3)

Country Link
EP (1) EP3000767A4 (fr)
ES (1) ES2531423B1 (fr)
WO (1) WO2014188031A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418194A1 (fr) * 1978-02-23 1979-09-21 Epinat Charles Chariot a roues metalliques et similaires, recevant des charges a soulever et/ou a transporter du type cric pneumatique
GB2298408A (en) * 1995-03-03 1996-09-04 Pfaff Silberblau Hebezeug Mobile lifting system for rail vehicle bogies
EP0776810A1 (fr) * 1995-11-29 1997-06-04 Rockwool Lapinus B.V. Véhicule de transport
US20050189737A1 (en) * 2002-12-30 2005-09-01 Goldie Lowell D. Jack dolly with brake
WO2007095672A1 (fr) * 2006-02-20 2007-08-30 Easy Place Trolleys Pty Ltd Chariot élévateur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1699835A1 (ru) * 1989-12-29 1991-12-23 Автокомбинат N1 Мосгорисполкома Устройство дл подъема и перемещени транспортного средства
DE19626119A1 (de) * 1996-06-28 1998-01-02 Paul Erich Kettler Rangierwagenheber
FR2927874B1 (fr) * 2008-02-22 2010-06-11 Caddie Support pour roulette auxiliaire de chariot de manutention et chariot de manutention muni d'un tel support
SG195293A1 (en) * 2011-06-17 2013-12-30 Austech And Design Pty Ltd Lifting and transporting device for wheeled objects including hospital beds

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418194A1 (fr) * 1978-02-23 1979-09-21 Epinat Charles Chariot a roues metalliques et similaires, recevant des charges a soulever et/ou a transporter du type cric pneumatique
GB2298408A (en) * 1995-03-03 1996-09-04 Pfaff Silberblau Hebezeug Mobile lifting system for rail vehicle bogies
EP0776810A1 (fr) * 1995-11-29 1997-06-04 Rockwool Lapinus B.V. Véhicule de transport
US20050189737A1 (en) * 2002-12-30 2005-09-01 Goldie Lowell D. Jack dolly with brake
WO2007095672A1 (fr) * 2006-02-20 2007-08-30 Easy Place Trolleys Pty Ltd Chariot élévateur

Also Published As

Publication number Publication date
ES2531423B1 (es) 2015-12-22
ES2531423A1 (es) 2015-03-13
EP3000767A4 (fr) 2017-01-11
EP3000767A1 (fr) 2016-03-30

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