EP0396233A1 - Cric de véhicule - Google Patents

Cric de véhicule Download PDF

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Publication number
EP0396233A1
EP0396233A1 EP90302629A EP90302629A EP0396233A1 EP 0396233 A1 EP0396233 A1 EP 0396233A1 EP 90302629 A EP90302629 A EP 90302629A EP 90302629 A EP90302629 A EP 90302629A EP 0396233 A1 EP0396233 A1 EP 0396233A1
Authority
EP
European Patent Office
Prior art keywords
arm
leg
foot
vehicle
jack
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.)
Withdrawn
Application number
EP90302629A
Other languages
German (de)
English (en)
Inventor
George Stibr
Graham Henry Colton
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 EP0396233A1 publication Critical patent/EP0396233A1/fr
Withdrawn legal-status Critical Current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 the type having a main leg pivotted to a base, or provided with a rolling base, and having an arm pivotted to the leg and carrying a shoe for engaging a load-point on a vehicle.
  • a screw is mounted between the leg and the arm for angularly moving them relatively, so as to effect lift.
  • a jack of this type, with a rolling base is known from GB-A-2053846.
  • This type of jack has gained favour, because it is cheap to produce and can easily be stowed in a vehicle, or even in a spare wheel.
  • One embodiment (Fig.4) of this jack also has an extension of the arm projecting to the opposite side of the leg for supporting the jack at the beginning of a lifting operation, but this is too short to be effective.
  • GB-A-1011933 discloses a similar type of jack with a rolling base and a much longer extension. This makes it easier to position the jack properly and more safely irrespective of whether the adjacent tyre is inflated or deflated.
  • the extension has no function during lift and is raised off the ground. This arrangement has the disadvantage that it is very bulky and difficult to stow.
  • GB A-2114537 discloses a similar jack, with its leg pivotted to a base, in which the extension is formed with a crank defining an auxiliary foot. This arrangement also positions the jack properly at the beginning of a lifting operation and is less bulky than that of GB-A-­10111933. The jack is still much more bulky and difficult to stow, however, than the jack shown in GB-A-­2053846. To facilitate stowage, the base can be detached, but this is an inconvenient arrangement and, even without the base, the jack remains bulky.
  • DE-A-2427443 discloses a similar type of jack in which the extension is pivotally mounted relative to the arm, so that stowage is facilitated. It is, however, necessary to manoeuvre the extension in setting up the jack and the loosely pivotted extension is inconvenient for handling.
  • DE-A-2621425 discloses an embodiment in which an additional link is provided between the base and the arm, being pivotted to both. This is an expensive arrangement which provides no assistance in stabilising the jack at the initiation of a jacking operation.
  • Another embodiment provides a sliding auxiliary foot, which again provides little assistance in setting up the jack.
  • a control arrangement on the arm extends the arm as the jack moves to a lifting position. This arrangement is also expensive to manufacture and suffers from substantial frictional resistance to sliding movement.
  • US-A-4720081 also discloses arrangements with extra links between the base and the arm.
  • FR-A-2353480 discloses a pivotted auxiliary foot which is controlled by a cam on the arm which engages a slide provided between the cam and the auxiliary foot. A further cam arrangement is provided to interconnect the slide and the foot. This is again a complex arrangement which is expensive to manufacture and has problems of frictional resistance.
  • DE-A-3712237 discloses an auxiliary foot fixed to the leg, so that it defines only a single setting up position for the jack and cannot be adjusted to accommodate a variable gap between the ground and the engagement point of a vehicle.
  • EP-A-0097558 discloses an auxiliary foot which is pivotally mounted on the leg and has control means in the form of an extension which bears against the underside of the arm.
  • a torsion spring biases the extension into bearing contact with the arm.
  • This arrangement provides for a variable setting up position of the auxiliary foot under the control of the arm and avoids most of the problems of the prior art referred to previously.
  • the auxiliary foot extends at an angle to the arm, which angle varies according to the position of the arm, so that the foot can be short, but effectively positioned.
  • This arrangement also has the disadvantage that a sliding bearing surface has to be provided, or there will be high frictional resistance and damage to paintwork on the arm. There is also a danger of the operator trapping a hand between the foot extension and the arm.
  • the present invention provides a jack which has the advantages of the jack of EP-A-0097558 without the disadvantages and with the easy stowability of the jack of GB-A-2053846.
  • the present invention permits the design to be such that the foot is correctly positioned whatever the loading of the vehicle, or with the wheel to be replaced having an inflated tyre, or deflated tyre. Correct positioning is important with this type of jack to ensure stability.
  • the pre-characterising part of Claim 1 is based on EP-A-0097558 and the invention is characterised in that the control means between the arm and the foot, providing for angular movement of the foot under the control of the arm, comprises gearing interconnecting the arm and the foot.
  • the ratio of the gearing can be pre-determined to provide optimum positioning of the foot in setting up the jack for different states of the vehicle.
  • the jack shown comprises a main leg (11) comprising two spaced, parallel members (11 a , 11 b ) secured together, near upper ends, by a brace (12) and, at lower ends, by a base (13).
  • the base is of a "rolling" type having a setting-up surface (14) and relatively angled main support surface (15). In use, during a lifting operation, the jack rolls from initial support on the setting-up surface to support on the main support surface.
  • a channel-shaped arm (20) extends between the leg members (11 a , 11 b ) and is pivotally mounted to the members, adjacent one end of the arm, by a pivot pin (21).
  • the arm extends almost wholly between the members in the stowed position ( Figure 4) of the jack and is angularly movable from this position relative to the leg about the axis of the pivot pin (21) towards an operative position, projecting to one side of the leg (11). This movement is effected by means of a screw (23).
  • a nut (24) is pivotally mounted between the leg members (11 a , 11 b ) by trunnions (25) ( Figure 2) and a pivot member (26) is pivotally mounted in the channel of the arm (20) between the sides (20 a , 20 b ) of the channel in apertures in the sides.
  • the screw (23) extends radially through the pivot member (26) and terminates in a head (27).
  • a bearing race (28) is mounted on the screw (23) between the head (27) and the pivot member (26).
  • the screw (23) screw-engages in the nut (24) and extends therethrough, a handle (32) being mounted on the end of the screw.
  • a shoe (30) is mounted on the upper end of the arm (20) and has a slot (31).
  • the shoe is designed to engage with a load point on a vehicle and may have a varying construction.
  • the handle (32) is turned to rotate the screw (23), so that the arm (20) is moved angularly relative to the leg (11).
  • the jack is set up with shoe (30) engaged with the load point of a vehicle and the jack is supported on the setting-up surface (14). As the load on the jack increases, the jack pivots so as to be supported on the support surface (15), with the leg substantially upright, as shown in Figure 3.
  • An auxiliary foot (40) is provided for supporting the jack in its setting-up position.
  • the foot is angularly adjustable relative to the leg (11) so as to position the foot in an optimum position for setting up the jack irrespective of the height of the shoe (30) above the base (13) in the setting-up position.
  • the foot is also angularly movable to a stowed position generally parallel to the leg as shown in Figure 4. Means is provided to move the foot automatically as the jack is operated.
  • the foot (40) is a one piece metal pressing and has an elongate body (41) of channel form with a main portion (46) and an integral base (42) at one end of the body.
  • the channel sides terminate at the opposite end to the base in spaced heads (43, 47), one of which (43) has an arcuate rack of teeth (44).
  • the foot is located between the leg members with the geared head (43)adjacent one leg member (11 b ) and the non-geared head (47) adjacent the other leg member (11a).
  • the heads are pivotally mounted on the leg members by a pin (45), the teeth (44) being co-axial with the pin (45)axis.
  • One of the channel sides (20b) of the arm (20) is provided with an arcuate row of teeth (48) co-axial with the pivot pin (21) which mounts the arm on the leg.
  • the teeth (48) of the arm mesh with the teeth (44) of the geared head (43) of the foot (40).
  • This arrangement means that the foot is forced, by the meshed teeth to move angularly relative to the base (13) as the arm is angularly moved to place the jack in a setting-up position. Conversely, as the arm is moved to the stowed position, the foot is automatically moved to its stowed position in which the jack is very compact for storage.
  • the ratio of the gearing can be pre-determined to provide optimum setting-up positions of the foot relative to the base (13).
  • the jack is designed with additional links attached to the arm and the main leg in a parallelogram arrangement with the arm and the leg, for example, as shown in GB-B-2 030 108.
  • the shoe (30) is then indirectly carried by the arm (20) and may be mounted on either of the links, or on both of the links, e.g. in the manner shown in GB-B-2 152 474.

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)
EP90302629A 1989-04-29 1990-03-13 Cric de véhicule Withdrawn EP0396233A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8909918 1989-04-29
GB898909918A GB8909918D0 (en) 1989-04-29 1989-04-29 Vehicle jack

Publications (1)

Publication Number Publication Date
EP0396233A1 true EP0396233A1 (fr) 1990-11-07

Family

ID=10656002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90302629A Withdrawn EP0396233A1 (fr) 1989-04-29 1990-03-13 Cric de véhicule

Country Status (2)

Country Link
EP (1) EP0396233A1 (fr)
GB (1) GB8909918D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0622328A2 (fr) * 1993-04-30 1994-11-02 August Bilstein GmbH & Co. KG Cric de véhicule
EP0688736A1 (fr) 1994-06-20 1995-12-27 E.A. Storz Gmbh & Co. Kg Cric pour véhicule
WO2000069772A1 (fr) * 1999-05-17 2000-11-23 Batz, S. Coop. Cric de levage de vehicules
WO2001072627A1 (fr) * 2000-03-27 2001-10-04 Thyssenkrupp Bilstein Gmbh Cric
WO2003029128A1 (fr) * 2001-09-24 2003-04-10 Thyssenkrupp Bilstein Gmbh Cric pour vehicule automobile
WO2008015303A1 (fr) * 2006-08-04 2008-02-07 De Alba Perinan Juan Manuel Cric électromécanique amélioré pour véhicules

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2427443A1 (de) * 1974-06-07 1975-12-18 Bilstein August Fa Wagenheber
DE2621425A1 (de) * 1976-05-14 1977-11-17 Allendorfer Stahl Gelenkwagenheber
FR2353480A1 (fr) * 1976-06-04 1977-12-30 Bilstein August Cric pour voiture
GB2053846A (en) * 1979-07-12 1981-02-11 Metallifacture Ltd Vehicle jacks
GB2114537A (en) * 1982-02-01 1983-08-24 Kenneth Carter Motor vehicle jack
EP0097558A1 (fr) * 1982-06-14 1984-01-04 Automobiles Peugeot Cric en Y pour véhicule automobile
US4720081A (en) * 1987-04-29 1988-01-19 General Motors Corporation Screw drive six link side lift vehicle jack assembly
DE3712237A1 (de) * 1987-04-10 1988-10-27 Audi Ag Wagenheber

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2427443A1 (de) * 1974-06-07 1975-12-18 Bilstein August Fa Wagenheber
DE2621425A1 (de) * 1976-05-14 1977-11-17 Allendorfer Stahl Gelenkwagenheber
FR2353480A1 (fr) * 1976-06-04 1977-12-30 Bilstein August Cric pour voiture
GB2053846A (en) * 1979-07-12 1981-02-11 Metallifacture Ltd Vehicle jacks
GB2114537A (en) * 1982-02-01 1983-08-24 Kenneth Carter Motor vehicle jack
EP0097558A1 (fr) * 1982-06-14 1984-01-04 Automobiles Peugeot Cric en Y pour véhicule automobile
DE3712237A1 (de) * 1987-04-10 1988-10-27 Audi Ag Wagenheber
US4720081A (en) * 1987-04-29 1988-01-19 General Motors Corporation Screw drive six link side lift vehicle jack assembly

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0622328A2 (fr) * 1993-04-30 1994-11-02 August Bilstein GmbH & Co. KG Cric de véhicule
EP0622328A3 (fr) * 1993-04-30 1994-12-28 Bilstein August Gmbh Co Kg Cric de véhicule.
EP0688736A1 (fr) 1994-06-20 1995-12-27 E.A. Storz Gmbh & Co. Kg Cric pour véhicule
DE4421464A1 (de) * 1994-06-20 1996-01-11 Storz E A Kg Wagenheber
WO2000069772A1 (fr) * 1999-05-17 2000-11-23 Batz, S. Coop. Cric de levage de vehicules
ES2181510A1 (es) * 1999-05-17 2003-02-16 Batz S Coop Gato elevacoches.
US6974124B1 (en) 1999-05-17 2005-12-13 Batz S. Coop Automobile lifting jack
WO2001072627A1 (fr) * 2000-03-27 2001-10-04 Thyssenkrupp Bilstein Gmbh Cric
WO2003029128A1 (fr) * 2001-09-24 2003-04-10 Thyssenkrupp Bilstein Gmbh Cric pour vehicule automobile
DE10146856B4 (de) * 2001-09-24 2008-11-27 Brano Wagenheber Gmbh Wagenheber für ein Kraftfahrzeug
WO2008015303A1 (fr) * 2006-08-04 2008-02-07 De Alba Perinan Juan Manuel Cric électromécanique amélioré pour véhicules

Also Published As

Publication number Publication date
GB8909918D0 (en) 1989-06-14

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