EP0197109A1 - Double scissor-type vehicle jack. - Google Patents
Double scissor-type vehicle jack.Info
- Publication number
- EP0197109A1 EP0197109A1 EP19850905051 EP85905051A EP0197109A1 EP 0197109 A1 EP0197109 A1 EP 0197109A1 EP 19850905051 EP19850905051 EP 19850905051 EP 85905051 A EP85905051 A EP 85905051A EP 0197109 A1 EP0197109 A1 EP 0197109A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jack
- scissor
- scissor arms
- arms
- arm
- 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
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
- 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
- the invention relates to a double scissor jack with four scissor arms connected to one another to form a handlebar polygon, with a threaded spindle which passes through the handle polygon and can be actuated by hand, the pairs of scissor arms lying opposite one another with a spindle nut and with a spindle abutment is mounted, with joints connecting the scissor arms to one another at the top and bottom, and with a support part which is connected to the scissor arms in an articulated manner and which has a guide slot forming a sliding joint guide for articulating the scissor arms.
- jacks When lifting a motor vehicle, jacks have to absorb not only vertical but also horizontal forces. Such horizontal forces arise, for example, from the approximately circular-arc movement of the raised wagon side about the axis determined by the wheels resting on the floor.
- each scissor arm is connected to the associated head or foot piece via a special axis.
- the forces acting horizontally on the jack are dissipated via tooth segments which are present at the ends of the scissor arms on the foot or headpiece side and engage with one another. So that these toothed segments can absorb the forces that occur in practice, the material thickness of the legs of the scissor arms must be chosen to be correspondingly large. These jacks are therefore heavy and expensive. It is also known to produce additional tooth segments and to attach them to the scissor arms. Although this reduces the weight of the jacks, these remain expensive due to the special production of the additional toothed segments and their attachment to the scissor arms.
- the pairs of scissors arms form a parallelogram of the handlebars and have eccentrically rounded ends with which they are supported in pairs on the inner wall of the head or foot piece.
- the vertical bearing formed by this support only works optimally when the support surface on the motor vehicle and the footprint of the foot part are parallel to one another, which is not always ensured, in particular when the jack is attached to the motor vehicle.
- the invention is therefore based on the object of improving a double-scissor jack of the type mentioned in such a way that, with a simple structure, proper control of the jack is achieved only by using the supporting part.
- At least one arm of one pair of scissor arms is extended beyond the joint adjoining the arm of the other pair of scissor arms and rotatably engages with this extension on the support part, in the guide slot of which a control part of the scissor arm of the other pair of scissor arms engages.
- Vehicle jack has a stabilization in the foot area which acts against lateral tipping and / or a corresponding vertical position of the support part in the head area.
- the improved or safer control of the support part is associated with greater load-bearing capacity or resilience of the vertical bearing.
- the support part is U-shaped and has in its side cheeks projecting beyond the connecting joint connecting the two scissor arms, one guide slot each for the control part designed as a control axis, which is arranged on the spindle side of the rotary joint of the extension of the scissor arm.
- Such U-shaped support parts are known in conventional jack constructions and their advantages of simple design and conventional processing can consequently be transferred to the jack according to the invention.
- control section are the same size. This essentially results in a vertical guidance of the support part or the handlebar polygon when the support part is used as a foot piece. At the same time it is achieved that the vertical length of the support part and its width can be kept comparatively small without impairing a simple design of the control. A particularly unproblematic guidance results when the control slot of the control part is a vertical slot.
- an upper and a lower support part are formed as the head and foot piece of the jack, which enclose the scissor arms with side cheeks on the outside.
- the head and foot piece or their side cheeks in the areas of the pivot joints of the extensions of the scissor arms are loaded in a conventional manner.
- the control parts or control axles need to remove only relatively small horizontal loads, so that their guidance in the guide slots is unproblematic. Special wear is avoided and costly reinforcement of the material thickness of the legs is not necessary.
- the head and foot pieces of the jack largely cover the articulation points or the end areas of the scissor arms, which increases the safety of the jack, but also enables a comparatively large standing or supporting surface.
- control parts of the head and foot piece are arranged approximately in the plane of the swivel joints of the extensions of the scissor arms located on the head and foot piece.
- At least one guide slot forms the head piece of the jack control curve following the vehicle movement during the lifting process.
- both the guide slot of the head part and the guide slot of the foot part as a cam, which requires smaller support parts and an additional inclination of the threaded spindle, which makes operation easier.
- FIG. 1 shows a side view of a double scissor jack in the transport position, partially in section
- FIG. 2 shows a side view of the jack of FIG. 1 in the lifting position.
- the jack shown in Fig. 1 has four scissor arms 10 to 13, of which the scissor arms 10, 11 and 12, 13 each form a pair of scissor arms.
- the scissor arms 10 to 13 form a handlebar polygon or parallelogram which is penetrated by a horizontal threaded spindle 14. This has a spindle head 15 for engaging a hand crank and is z.
- B. designed as a roller bearing abutment 16 supported on the scissor arms 12, 13 or on a bearing sleeve 18, which engages with bearing pins 17 in the scissor arms 12, 13.
- the threaded spindle 14 passes through a cylindrical bore of the bearing sleeve 18 and engages with its opposite end in a spindle nut (not shown), the bearing pins 19 of which form a joint for the scissor arms 10, 11.
- a spindle nut not shown
- support parts 20, 21 are present, which function as the head and foot of the jack.
- the jack With the lower support part 21, the jack is placed on a floor surface and the upper support part 20 is attached to the motor vehicle when the jack is raised, for which purpose the fork part 22, which is firmly connected to the support part 20, is used. This prevents lateral relative slipping between the motor vehicle and the support part 20.
- the support parts 20, 21 are each U-shaped and include with their side cheeks 20 ', 21' the upper and lower ends of the scissor arms 10, 12 and
- the scissor arms 10, 12 and 11, 13 are connected in a rotatable manner by means of connecting joints 23 designed as joint axes.
- the connecting joints 23 are each located so that the arms
- control parts 27 designed as control axes which engage in these guide slots 26.
- the control parts 27 are arranged parallel to the axes of the joints 23, 25. Their distances x 1 and y 1 to the connecting joints 23 are equal to the distances x, y of the rotary joints 25 to the connecting joints 23. This results in a vertical alignment of the support parts 20, 21 in the event that the Guide slots 26 as shown in FIGS. 1, 2 are vertical elongated holes.
- these guide slots 26 in an arcuate manner so that they control the support part 20 or the handlebar polygon formed from the scissor arms 10 to 13 in such a way that the support part 22 follows the vehicle movement during the lifting process, that is to say an arc ⁇ shaped movement performed. This precludes relative movements between the motor vehicle and the jack, which consequently maintains the desired stability. The jack does not experience any horizontal vertical movements in the area of the support piece 22.
- the arrangement of the control parts 27 shown in FIG. 1 in the plane of the swivel joints 25 is exited, without however reducing the stability of the jack.
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)
- Handcart (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
Le cric pour véhicules, en forme de pince double possède quatre branches (10 à 13) reliées les unes aux autres par un polygone de guidage. Le cric comporte un arbre fileté (14) manuellement commandé, qui traverse le polygone et est supporté par une paire de pinces, l'une en face de l'autre, avec un écrou d'arbre et un palier d'appui (16). En haut et en bas il existe des articulations (23, 25) qui relient les pinces (10, 12; 11, 13) les unes aux autres. Le cric possède une partie de support (20, 21) qui est connectée aux pinces (10, 12; 11, 13) et possède une ouverture de guidage (26) qui sert de guide coulissant pour une articulation des pinces. Pour réaliser une conception simple offrant une commande parfaite du cric simplement par l'extension de la partie de support, au moins une partie (12) de l'une des pinces (12, 13) comporte un prolongement au delà de l'articulation qui se trouve à côté de l'élément (10) de l'autre pince (10, 11) et exerce un effet de rotation, grâce à ce prolongement (24), sur la partie de support (20), dans l'ouverture de guidage dont une partie de commande (27) de l'élément de pince (10) entraîne l'autre paire de pinces (10, 11).The vehicle jack, in the form of a double clamp, has four branches (10 to 13) connected to each other by a guide polygon. The jack has a manually controlled threaded shaft (14) which crosses the polygon and is supported by a pair of pliers, one opposite the other, with a shaft nut and a support bearing (16) . At the top and bottom there are joints (23, 25) which connect the clamps (10, 12; 11, 13) to each other. The jack has a support part (20, 21) which is connected to the clamps (10, 12; 11, 13) and has a guide opening (26) which serves as a sliding guide for articulation of the clamps. To achieve a simple design offering perfect control of the jack simply by extending the support part, at least one part (12) of one of the clamps (12, 13) has an extension beyond the articulation which is located next to the element (10) of the other clamp (10, 11) and exerts a rotation effect, thanks to this extension (24), on the support part (20), in the opening of guide, one control part (27) of the clamp element (10) of which drives the other pair of clamps (10, 11).
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8429156U | 1984-10-04 | ||
DE19848429156 DE8429156U1 (en) | 1984-10-04 | 1984-10-04 | DOUBLE SCISSOR LIFT |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0197109A1 true EP0197109A1 (en) | 1986-10-15 |
EP0197109B1 EP0197109B1 (en) | 1988-03-02 |
Family
ID=6771373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850905051 Expired EP0197109B1 (en) | 1984-10-04 | 1985-10-02 | Double scissor-type vehicle jack |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0197109B1 (en) |
AU (1) | AU4958185A (en) |
DE (2) | DE8429156U1 (en) |
ES (1) | ES289302U (en) |
WO (1) | WO1986002060A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD268229A1 (en) * | 1988-01-14 | 1989-05-24 | Suhl Hebezeugwerk | JACK |
CA1302389C (en) * | 1988-02-11 | 1992-06-02 | Rudolf Gruber | Jack and components therefor |
GB2231859B (en) * | 1989-05-19 | 1993-09-29 | Land Rover Uk Ltd | A jack for a vehicle |
US5421369A (en) * | 1992-12-30 | 1995-06-06 | Combustion Engineering, Inc. | Mechanically actuated plug |
ES2138533B1 (en) * | 1997-06-19 | 2000-09-16 | Batz S Coop Ltda | SCISSOR JACK. |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR34858E (en) * | 1927-10-22 | |||
FR458793A (en) * | 1912-09-02 | 1913-10-18 | Edgard Cremieu Javal | Improvements in the construction of folding lifting devices |
FR548718A (en) * | 1922-01-11 | 1923-01-22 | Improvements to lifting cylinders | |
GB266810A (en) * | 1925-12-02 | 1927-03-02 | Florence Fee Hern | Improvements in or relating to lifting jacks and the like |
FR692878A (en) * | 1930-03-28 | 1930-11-12 | Jack for motor vehicles | |
GB424764A (en) * | 1933-08-18 | 1935-02-18 | Auncel Brian Fee Hern | Improvements in and relating to lifting jacks and the like |
FR2132577B1 (en) * | 1971-04-09 | 1975-09-26 | Rousseau Jean | |
JPS6042159B2 (en) * | 1978-07-25 | 1985-09-20 | アイシン精機株式会社 | Pantograph type jack |
-
1984
- 1984-10-04 DE DE19848429156 patent/DE8429156U1/en not_active Expired
-
1985
- 1985-09-30 ES ES1985289302U patent/ES289302U/en active Pending
- 1985-10-02 WO PCT/DE1985/000342 patent/WO1986002060A1/en active IP Right Grant
- 1985-10-02 AU AU49581/85A patent/AU4958185A/en not_active Abandoned
- 1985-10-02 EP EP19850905051 patent/EP0197109B1/en not_active Expired
- 1985-10-02 DE DE8585905051T patent/DE3561715D1/en not_active Expired
Non-Patent Citations (1)
Title |
---|
See references of WO8602060A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0197109B1 (en) | 1988-03-02 |
ES289302U (en) | 1986-03-16 |
WO1986002060A1 (en) | 1986-04-10 |
DE8429156U1 (en) | 1985-02-28 |
AU4958185A (en) | 1986-04-17 |
DE3561715D1 (en) | 1988-04-07 |
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Legal Events
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