EP0516314B1 - Wagenheber - Google Patents

Wagenheber Download PDF

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Publication number
EP0516314B1
EP0516314B1 EP19920304383 EP92304383A EP0516314B1 EP 0516314 B1 EP0516314 B1 EP 0516314B1 EP 19920304383 EP19920304383 EP 19920304383 EP 92304383 A EP92304383 A EP 92304383A EP 0516314 B1 EP0516314 B1 EP 0516314B1
Authority
EP
European Patent Office
Prior art keywords
foot
base
pin
jack
leg
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.)
Expired - Lifetime
Application number
EP19920304383
Other languages
English (en)
French (fr)
Other versions
EP0516314A3 (de
EP0516314A2 (de
Inventor
David Parke
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.)
Metallifacture Ltd
Original Assignee
Metallifacture Ltd
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 Metallifacture Ltd filed Critical Metallifacture Ltd
Publication of EP0516314A2 publication Critical patent/EP0516314A2/de
Publication of EP0516314A3 publication Critical patent/EP0516314A3/xx
Application granted granted Critical
Publication of EP0516314B1 publication Critical patent/EP0516314B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/12—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated comprising toggle levers

Definitions

  • This invention relates to vehicle jacks.
  • Jacks of both the scissor-type and the y-form type are well known.
  • GB-A- 1011933 describes a scissor-type jack comprising a pair of legs, whereby one leg carries a load support member at its upper end and the other leg has an angled foot at its lower end, and the two legs are pivotally joined mid-way along their lengths.
  • a screw is mounted between two adjacent ends of the legs.
  • GB-A-2053846 describes a y-form type jack comprising an arm pivoted on a leg and an actuator screw connected between the arm and the leg.
  • the leg comprises two elongate plates formed at its longitudinal edges, and the arm is pivoted between the plates. The plates are received in a foot and are welded thereto.
  • DE-U-8522952 (US-A-4765595) purports to provide an additional support stay to locate the jack at the start of a lifting operation.
  • the design of this jack is such that the entire weight of the vehicle is passed through a pin welded onto the surface of the foot adjacent to the support stay. This provides a weak point under a side load, and, therefore, this construction does not solve the problem adequately.
  • EP-A-0232836 The same problem is met with EP-A-0232836.
  • DE-U-9005572.1 also discloses a jack in which the leg is pivotally mounted by a pivot pin on a base. At the start of a jacking operation, the lower end of the leg may contact the base. When a force is exerted on the jack, in use, however, the leg pivots out of contact with the base, with no rolling movement from one support surface to another. The entire force on the jack is carried by the pivot pin.
  • DE-U-9015483.5 discloses a similar arrangement. Both of these disclosures, therefore, suffer the same problem as DE-U-8522952.
  • DE-A-3608003, DE-U-8702589.2, US-A-4015825 and FR-A-623956 also suffer from the same problem.
  • An object of the present invention is to overcome this problem.
  • the precharacterising part of Claim 1 is based on GB-A-2053846 as the closest prior art document.
  • This provides a vehicle jack comprising an elongate leg provided with a foot at one end, an arm supported by the leg and pivotally movable relative thereto, a load-engageable member carried by the arm, and a screw and nut arrangement for moving the arm relative to the leg for raising and lowering the load-engageable member, the foot having a supporting surface including a pair of relatively angled surface portions, a first of which supports the jack in a setting up position, the jack being capable of rolling on the supporting surface during lift to a position of support by the second of said surface portions.
  • the present invention is characterised by a ground-engageable base and in that said rolling movement is effected with the supporting surface in rolling contact with the base, and further characterised by locating means maintaining a predetermined location of the foot on the base.
  • an end of the leg adjoining the foot is adapted to receive a pin therein, and fastening means attach the pin to the base, so as to define said means.
  • the fastening means may comprise horse-shoe shaped brackets adapted to pass around the pin and into the base.
  • the scissor-type jack comprises a leg 20 with a foot 22 at its lower end, and a main arm 24a articulated on a horizontal axis and presenting at its free end a load support member 26a.
  • the leg 20 and arm 24a are pivotally interconnected mid-way along their lengths by a linkage comprising two articulated support arms 28a, 29a.
  • a screw 30a is pivotally mounted at the articulation joint 11 between the support arms and screw engages in a nut 12 at the articulation joint between the main arm 24a and the leg 20.
  • the leg 20 comprises a pair of elongated, parallel, spaced channel members 20a, 20b and the main arm 24a pivots between the members. The channel members are welded to the foot 22.
  • the jack shown comprises an arm 24b pivoted on a leg 20 to define a y-shape, with an actuator screw 30b connected between a pivot point 11b and a nut 12b on the arm 24b and the leg 20 respectively.
  • the upper end of the arm 24b carries a load support member 26b.
  • the foot 22 has a supporting surface including a pair of relatively angled surface portions.
  • a first angled surface portion 34 supports the jack in a setting up position (see Figure 3). The jack rolls on the supporting surface during lift to a position of support by the second angled surface portion 36.
  • Each type of jack further comprises a ground-engageable base 38.
  • the base has a large area, relative to the foot, in contact with the ground.
  • the angled surface portions 34,36 of the foot have rolling contact with the large area top surface of the base 38, means being provided to maintain location of the foot 22 on the base 38.
  • a pin 40 is located at the end of the leg 20 adjacent to the foot 22 and is received in the bend of the foot between the angled surface portions 34, 36.
  • the channel members 20a,20b have arcuate cutout portions 42, which co-operate with the foot to define apertures which receive the pin 40.
  • the pin is substantially the same length as the foot, extending along the foot from one side to the other.
  • the pin 40 may also be tack welded to the foot 22 to prevent it from coming adrift.
  • Fastening means attach the pin 40 to the base 38, thereby locating the foot 22 on the base 38.
  • a pair of holes 44 is provided in the second angled surface 36 of the foot 22 to receive fastening means, which pass around the pin 40, through the holes in the second angled surface portion 36 of the foot, to attach the pin 40 to the base.
  • the fastening means comprise horseshoe shaped brackets 46 which receive the pin 40 and are attached to the base 38.
  • the legs of each bracket 46 terminate in reduced width portions 50 defining shoulders.
  • the reduced width portions are received in sockets 48 in the base and are turned under to secure the brackets to the base (see Figure 5).
  • the shoulders, defined by the reduced width portions 50 seat on the top of the base.
  • a third hole 52 in the second angled surface portion 36 of the foot 22 is provided approximately mid-way between said pair of holes 44 and receives a torsion spring 54 located around the pin.
  • the torsion spring 54 serves to resist the rolling movement of the foot from the first angled surface portion 34, which supports the jack in a setting up position, onto the second angled surface portion 36, which supports the jack during lift, thereby to dampen movement of the foot relative to the base and to bias the foot to its setting up position.
  • the ground-engageable base 38 provides good stability for the jacks by providing a large contact area with the ground.
  • the base prevents slippage of the jack in use, when side-load is put on the jack during lift, and prevents sinkage of the jack into soft ground.
  • the large area base 38 also makes it easier to locate the jack properly to the correct setting up position.
  • the connection of the foot with the base is such that side load on the jack does not pass through the pin, but through the brackets 46.
  • the pin serves only to locate the foot on the base, and no load is passed through the pin under side forces on the jack. The side forces are taken by the brackets, providing a stable and strong construction.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Claims (5)

  1. Wagenheber mit einem langgestreckten Standbein (20), das an seinem einen Ende einen Fuß (22) aufweist, mit einem Lastarm (24a, 24b), der von dem Standbein getragen und diesem gegenüber schwenkbeweglich ist, mit einem von dem Lastarm getragenen Lastkopf (26, 26b) und mit einer Mutter/Spindel-Anordnung (12, 30a, 30b) zum Bewegen des Lastarms relativ zum Standbein beim Anheben und Ablassen des Lastkopfes, wobei der Fuß (22) eine Tragfläche mit zwei im Winkel zueinander angeordneten Oberflächenbereichen (34, 36) aufweist, von denen der erste Oberflächenbereich (34) den Wagenheber in einer Ansetzstellung trägt und der Wagenheber während des Anhebevorgangs über die Tragfläche in den zweiten Oberflächenbereich (36) schwenkt, dadurch gekennzeichnet, daß eine Bodenplatte (38) vorgesehen ist, auf der die Tragfläche während des Anhebevorgangs abrollt, und daß Anordnungsmittel für die Beibehaltung einer vorher festgelegten Relativlage zwischen dem Fuß (22) und der Bodenplatte (38) vorgesehen sind.
  2. Wagenheber nach Anspruch 1, dadurch gekennzeichnet, daß die Anordnungsmittel einen Bolzen (40) aufweisen, der über Fixiermittel an der Bodenplatte (38) gehalten ist, und daß das Standbein (20) auf dem Bolzen (40) schwenkbar angeordnet ist.
  3. Wagenheber nach Anspruch 2, dadurch gekennzeichnet, daß die Fixiermittel U-förmige Klammern (46) aufweisen, die sich um den Bolzen (40) erstrecken und an der Bodenplatte (38) befestigt sind.
  4. Wagenheber nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Bolzen (40) an dem Fuß (22) durch eine Schweißung angehaftet ist.
  5. Wagenheber nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß auf dem Bolzen (40) eine Torsionsfeder (54) gelagert ist, die den Fuß (22) in Richtung auf die Ansetzstellung beaufschlagt.
EP19920304383 1991-05-29 1992-05-14 Wagenheber Expired - Lifetime EP0516314B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9111502 1991-05-29
GB919111502A GB9111502D0 (en) 1991-05-29 1991-05-29 Vehicle jacks

Publications (3)

Publication Number Publication Date
EP0516314A2 EP0516314A2 (de) 1992-12-02
EP0516314A3 EP0516314A3 (de) 1994-02-23
EP0516314B1 true EP0516314B1 (de) 1996-11-06

Family

ID=10695720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920304383 Expired - Lifetime EP0516314B1 (de) 1991-05-29 1992-05-14 Wagenheber

Country Status (3)

Country Link
EP (1) EP0516314B1 (de)
DE (1) DE69215005T2 (de)
GB (1) GB9111502D0 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES1024192Y (es) * 1993-03-30 1994-04-16 Tub Sa Dispositivo estabilizador automatico y de refuerzo para gatos elevadores.
FR2758806B1 (fr) * 1997-01-24 1999-04-16 Adwest Bowden France Sa Cric pour soulever un vehicule
US9938714B2 (en) * 2016-03-24 2018-04-10 Omg, Inc. Hinged building shrinkage compensation device
US10745913B2 (en) 2016-03-24 2020-08-18 Omg, Inc. Building shrinkage compensation device with rotating gears

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR623956A (fr) * 1925-10-31 1927-07-05 Cric à parallélogramme articulé
US4015825A (en) * 1976-01-28 1977-04-05 Auto Specialties Manufacturing Company Tiltable jack
DE3608003A1 (de) * 1986-03-11 1987-09-17 Storz E A Kg Wagenheber
DE8702589U1 (de) * 1987-02-20 1987-07-30 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
ES1013831Y (es) * 1990-04-10 1991-06-16 Salvador Rovira Xavier Gato mecanico mejorado para vehiculos automoviles.
DE9015483U1 (de) * 1990-11-12 1991-01-31 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
DE9005572U1 (de) * 1990-05-16 1990-07-19 August Bilstein GmbH & Co KG, 5828 Ennepetal Wagenheber
ES1014898Y (es) * 1990-07-30 1991-11-16 Salvador Rovira Xavier Gato mecanico perfeccionado para vehiculos automoviles.

Also Published As

Publication number Publication date
GB9111502D0 (en) 1991-07-17
EP0516314A3 (de) 1994-02-23
DE69215005T2 (de) 1997-03-06
DE69215005D1 (de) 1996-12-12
EP0516314A2 (de) 1992-12-02

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