EP3154895B1 - Scherenhubanordnung - Google Patents

Scherenhubanordnung Download PDF

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Publication number
EP3154895B1
EP3154895B1 EP15728501.6A EP15728501A EP3154895B1 EP 3154895 B1 EP3154895 B1 EP 3154895B1 EP 15728501 A EP15728501 A EP 15728501A EP 3154895 B1 EP3154895 B1 EP 3154895B1
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EP
European Patent Office
Prior art keywords
nut
arm
leg
carrier
foot
Prior art date
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Application number
EP15728501.6A
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English (en)
French (fr)
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EP3154895A1 (de
Inventor
Anders Sandberg
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Volvo Car Corp
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Volvo Car Corp
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Publication of EP3154895A1 publication Critical patent/EP3154895A1/de
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    • 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 present application relate to a scissor lifting arrangement, and especially a scissor lifting arrangement suitable for use as a motor vehicle lifting jack.
  • Scissor lifting arrangements such as half scissors and full scissors, are frequently used to provide cost efficient lifting capabilities.
  • a head and a foot are interconnected by a pair of arms pivotally joined to the head and a pair of legs pivotally joined to the foot. Each respective pair of one arm and one leg is then further pivotally joined at a respective knee.
  • a screw is attached to one of the two knees with a bearing (glide or ball bearing) and a nut held by a nut-carrier is attached to the other knee.
  • a mechanism is provided for turning the screw, such that as the screw is turned the two knees of the full scissor lifting arrangement are forced together causing a distance between a head and a foot to increase.
  • Scissor lifting arrangements both Full Scissor and Half Scissor lifting arrangements, which e.g. are the most common lifting jack concepts in the automotive industry, have a great weakness in that they are very weak as long as they are in a low position. This as the geometry for pulling the arms and legs thereof more upright from a low position is very unfavorable.
  • this retracted, low, position is today normally only used for storage of the scissor lifting arrangement, e.g. storage of a lifting jack in the trunk of an automobile.
  • Examples of such situations where the space between the jacking point at the vehicle body and the ground may be insufficient include situations such as: multiple tyres punctured on one side of the vehicle, vehicle placed on uneven ground, a need to place a support under the lifting jack due to soft ground or similar.
  • a scissor type lifting jack similar to that already described above is shown in which a linear actuator consists of a screw connected, not between the knees as above, but in accordance with GB 2125007 between levers protruding from the legs, and more specifically to pivotal connections at these levers which pivotal connections, in the lowermost position of figure 13, are offset from the pivot joints at the knees and the pivotal connections to the foot, i.e. offset from a plane through all of these pivotal connections.
  • these levers will provide leverage to assist operation of the jack, especially from the fully retracted condition.
  • offset pivotal connections are shown in the vicinity of the pivot joints at the knees, they may be located intermediate the pivotal connections at the knees and the foot or beyond (i.e. outwardly) of the pivot joints at the knees, in order to provide suitable leverage.
  • the screw is threaded at through a cross pin at one pivotal connection to one of these levers and a plain portion of the screw rod is rotatable through another cross pin at the other pivotal connection to the other lever and is constrained against axial movement relative to the other cross pin mainly by a thrust bearing and also by a washer located by projections on the plain rod portion.
  • a turning eye is provided at the non-threaded end of the screw.
  • Embodiments herein aim to provide an improved scissor lifting arrangement which is simple, practical and cost-effective in construction and is effective in its action; and by the use of which a heavy load may be easily lifted even when the lifting arrangement is lowered to its minimum height.
  • a scissor lifting arrangement that comprises: a foot for resting the lifting arrangement against a supporting surface; at least one leg having first and second longitudinal ends, the leg being pivotally coupled to the foot at the first longitudinal end thereof; at least one arm having first and second longitudinal ends, the first longitudinal end of the arm being pivotally coupled to the leg; a head for supporting a load to be lifted, the head being pivotally coupled to the second longitudinal end of the arm; a primary actuation mechanism, comprising a drive screw, a nut and a nut-carrier, by which a separation distance between the head and the foot is adjustable between an extended and a collapsed position; where the nut is held by the nut-carrier at which, during rotation of the drive screw, it is arranged to be translated between a first end and a second end of a predetermined range; the drive screw and nut-carrier are respectively operatively coupled to an arm and a leg, so that rotation of the drive screw in a first direction, from a minimum separation distance, causes translation of
  • the secondary actuation mechanism is based on a combination of a wedge shaped nut and at least one cam arranged at at least one of the leg, the arm, the head and the foot such that the cam will be contacted by the wedge shaped nut upon translation of the nut towards the first end of the predetermined range at the nut-carrier to cause at least one of the leg, the arm, the head and the foot to be pushed towards a more extended position.
  • the secondary actuation mechanism is based on a combination of a wedge shaped nut and at least one roller arranged at at least one of the leg, the arm, the head and the foot such that the roller will be contacted by the wedge shaped nut upon translation of the nut towards the first end of the predetermined range at the nut-carrier to cause at least one of the leg, the arm, the head and the foot to be pushed towards a more extended position.
  • a combination of a wedge shaped nut and at least one roller provides for a low friction mechanism making it either easier to turn the drive screw or possible to have a steeper angle wedge shaped nut, providing for increased lift by the secondary actuation mechanism.
  • the secondary actuation mechanism is based on a combination of a nut and at least one curved cam arranged at at least one of the leg, the arm, the head and the foot such that the curved cam will be contacted by the nut upon translation of the nut towards the first end of the predetermined range at the nut-carrier to cause at least one of the leg, the arm, the head and the foot to be pushed towards a more extended position.
  • the secondary actuation mechanism is based on a combination of a nut and at least one linkarm operatively coupled to at least one of the leg, the arm, the head and the foot such that the linkarm will be contacted by the nut upon translation of the nut towards the first end of the predetermined range at the nut-carrier to cause at least one of the leg, the arm, the head and the foot to be pushed towards a more extended position.
  • the secondary actuation mechanism is based on a combination of a nut having an external rack and a at least one pinion gear arranged to drive a lifter arranged to operate at at least one of the leg, the arm, the head and the foot such that the pinion gear will be rotated by the rack of the nut upon translation of the nut towards the first end of the predetermined range at the nut-carrier to cause at least one of the leg, the arm, the head and the foot to be pushed towards a more extended position.
  • the secondary actuation mechanism is based on a combination of a nut having an external rack and a at least one pinion gear carrying a cam arranged to operate at at least one of the leg, the arm, the head and the foot such that the pinion gear will be rotated by the rack of the nut upon translation of the nut towards the first end of the predetermined range at the nut-carrier to cause at least one of the leg, the arm, the head and the foot to be pushed towards a more extended position.
  • it further comprises a locking arrangement enabling selective locking and release of the nut to the nut-carrier, when locked inhibiting translation of the nut at the nut-carrier.
  • a locking arrangement enabling selective locking and release of the nut to the nut-carrier provides for enhanced stability and enables well controlled angles of the arms and legs of the scissor lifting arrangement through eliminating the ability of the nut to be translated at the nut-carrier.
  • the locking arrangement comprises a ratchet arranged to selectively lock the nut to the nut-carrier at either of the first end and the second end of the predetermined range.
  • a ratchet arranged to selectively lock the nut to the nut-carrier at either of the first end and the second end of the predetermined range provides for a simple and robust locking arrangement.
  • a manual release actuator for effecting manual release of the nut when locked to the nut-carrier.
  • a manual release actuator provides for simple and reliable transition between only allowing the primary actuation mechanism and allowing transitions between the first and second actuation mechanisms and vice versa.
  • an eleventh aspect further comprises an automatic release actuator for effecting automatic release of the nut when locked to the nut-carrier at a predetermined separation distance between the foot and head.
  • an automatic release actuator for effecting automatic release at a predetermined separation distance provides for ensuring higher stability for some separation distances whilst enabling transitions between the first and second actuation mechanisms at other.
  • an twelfth aspect is provided that it further comprises a damping arrangement arranged to damp translation of the nut at the nut-carrier.
  • the scissor lifting arrangement further comprises a first arm and a second arm and a first leg and a second leg; and that the first longitudinal end of the first arm is pivotally coupled to the first leg at the second longitudinal end thereof to form a first knee; the second leg has first and second longitudinal ends, the second leg is pivotally coupled to the foot at the first longitudinal end thereof; the second arm has first and second longitudinal ends, the first longitudinal end of the second arm is pivotally coupled to the second leg at the second longitudinal end thereof to form a second knee; the drive screw and nut-carrier are respectively operatively coupled to the arms and legs at the first and second knees.
  • a scissor lifting cluster arrangement that comprises a plurality of scissor lifting arrangements as above the drive screws of which are arranged to be operated in synchronicity.
  • a vehicle lifting jack which comprises a scissor lifting arrangement as above.
  • a vehicle lifting jack which comprises a scissor lifting arrangement as above provides for a simple and reliable lifting jack which is able to lift a vehicle from a low position and which may be collapsed and stowed efficiently in the vehicle.
  • a scissor lifting arrangement that comprises: a foot integral with a supporting structure; at least one arm having first and second longitudinal ends, the first longitudinal end of the arm being pivotally coupled to a nut-carrier; a head integral with a lifting structure for supporting a load to be lifted, the lifting structure being pivotally coupled to the second longitudinal end of the arm; a guide mechanism for guiding the movement of the lifting structure in relation to the supporting structure; a primary actuation mechanism, comprising a drive screw, a nut and the nut-carrier, by which a separation distance between the lifting structure and the supporting structure is adjustable between an extended and a collapsed position; the nut is held by the nut-carrier at which, during rotation of the drive screw, it is arranged to be translated between a first end and a second end of a predetermined range; the drive screw being operatively coupled to the supporting structure and the nut-carrier being operatively coupled to the arm, so that rotation of the drive screw in a first direction, from
  • a secondary actuation mechanism where the translation of the nut is used to cause at least one of the arm and the lifting structure to be pushed towards a more extended position with respect to the supporting structure and increase the separation distance provides for an improved starting position for the primary actuation mechanism especially suitable for thin scissor lifting arrangements, such as those suitable to be used for lifting platforms or flatbeds of vehicle trailers.
  • a scissor lifting arrangement 1 which, although primarily intended for use as a vehicle lifting jack, with appropriate adaption is capable of a wide variety of practical applications, e.g. where lifting, lateral displacement or pressure application is required.
  • the scissor lifting arrangement 1 has a foot 2 for resting the lifting arrangement against a supporting surface. At least one leg 3 having first and second longitudinal ends 3a, 3b is provided. The leg 3 is pivotally coupled to the foot 2 at the first longitudinal end 3a thereof. At least one arm 4 having first and second longitudinal ends 4a, 4b is provided. The first longitudinal end 4a of the arm 4 is pivotally coupled to the leg 3. A head 5 is also provided for supporting a load to be lifted. The head 5 is pivotally coupled to the second longitudinal end 4b of the arm 4.
  • a primary actuation mechanism comprising a drive screw 6, a nut 7 and a nut-carrier 8 is provided, by which a separation distance S between the head 5 and the foot 2 is adjustable between an extended position, c.f. figure 1c , and a collapsed position, c.f. figure 1a .
  • the nut 7 is held by the nut-carrier 8 at which, during rotation of the drive screw 6, it is arranged to be translated between a first end R1 and a second end R2 of a predetermined range R.
  • the predetermined range R is delimited by an end stop at at least the first end R1 thereof, such that the nut 7 will abut the end stop at the first end R1 thereof and cause the nut-carrier 8 to move with the nut 7 in the first direction, i.e. a direction extended from R2 towards R1, should the nut be translated in the first direction.
  • the nut-carrier 8 may e.g. be a bracket, as illustrated in the figures, inside of which the nut 7 is held translatable the predetermined range R.
  • the nut-carrier 8 may be at least one transverse pin (not shown), e.g. at a pivotal joint, which transverse pin runs through an elongated opening (not shown) in the nut 7 or any structure fixedly joined to the nut 7.
  • the elongated opening should then have an extension corresponding to the predetermined range R and be arranged such that the nut 7 may be translated the predetermined range R upon the transverse pin.
  • pins from two opposing sides (not shown) which runs in opposing side elongated slots in the nut 7 or any structure fixedly joined to the nut 7.
  • the elongated slots should then also have extensions corresponding to the predetermined range R and be arranged such that the nut 7 may be translated the predetermined range R upon the opposing side pins.
  • any arrangement of a nut-carrier 8 which allows the nut 7 to be translated the predetermined range R through turning of the drive screw 6 for affecting the functionality described herein may be feasible for realization of the scissor lifting arrangement 1 described herein.
  • the drive screw 6 and nut-carrier 8 are respectively operatively coupled to an arm 4 and a leg 3.
  • the drive screw 6 is threaded through the nut 7 held by the nut-carrier 8 which is pivotally connected to one of the arm 4 or the leg 3 and a plain portion of the rod shaped drive screw 6 is rotatable through a cross element 10 at another pivotal connection to the other of arm 4 and leg 3 and is constrained against axial movement relative to the cross element 10, e.g. by a thrust bearing, such as a glide or ball bearing (not shown).
  • a turning eye 6a or another kind of cranking arrangement is provided at the non-threaded end of the drive screw 6.
  • Rotation of the drive screw 6 in a first direction causes translation of the nut 7 towards the first end R1 of the predetermined range R.
  • the arm 4 and leg 3 Upon sustained rotation of the drive screw 6 in the first direction thereafter, the arm 4 and leg 3 will be pulled towards respective more extended positions, which increases the separation distance S.
  • a secondary actuation mechanism is arranged to be effected by translation of the nut 7 from the second R2 end towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the leg 3, the arm 4, the head 5 and the foot 2 to be pushed towards a more extended position, which increases the separation distance S.
  • the secondary actuation mechanism can be based on a combination of a wedge shaped nut 7 and at least one cam 9 arranged at at least one of the leg 3, the arm 4, the head 5 and the foot 2 such that the cam 9 will be contacted by the wedge shaped nut 7 upon translation of the nut 7 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the leg 3, the arm 4, the head 5 and the foot 2 to be pushed towards a more extended position, as illustrated in figure 1b .
  • the secondary actuation mechanism can be based on a combination of a wedge shaped nut 7 and at least one roller 9a arranged at at least one of the leg 3, the arm 4, the head 5 and the foot 2 such that the roller 9a will be contacted by the nut 7 upon translation of the nut 7 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the leg 3, the arm 4, the head 5 and the foot 2 to be pushed towards a more extended position, as illustrated in figure 2b .
  • the roller 9a may be carried by a roller bracket or a tappet, in relation to which it may be arranged to rotate by a bearing, such as a glide or ball-bearing.
  • the secondary actuation mechanism can be based on a combination of a nut 7 and at least one curved cam 11 arranged at at least one of the leg 3, the arm 4, the head 5 and the foot 2 such that the curved cam 11 will be contacted by the nut 7 upon translation of the nut 7 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the leg 3, the arm 4, the head 5 and the foot 2 to be pushed towards a more extended position.
  • the secondary actuation mechanism is based on a combination of a nut 7 and at least one linkarm 12 operatively coupled to at least one of the leg 3, the arm 4, the head 5 and the foot 2 such that the linkarm 12 will be contacted by the nut 7 upon translation of the nut 7 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the leg 3, the arm 4, the head 5 and the foot 2 to be pushed towards a more extended position.
  • the secondary actuation mechanism is based on a combination of a nut 7 having an external rack 13 and a at least one pinion gear 14 arranged to drive a lifter 15 arranged to operate at at least one of the leg 3, the arm 4, the head 5 and the foot 2 such that the pinion gear 14 will be rotated by the rack 13 of the nut 7 upon translation of the nut 7 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the leg 3, the arm 4, the head 5 and the foot 2 to be pushed towards a more extended position.
  • the secondary actuation mechanism is based on a combination of a nut 7 having an external rack 13 and a at least one pinion gear 14 carrying a cam 16 arranged to operate at at least one of the leg 3, the arm 4, the head 5 and the foot 2 such that the pinion gear 14 will be rotated by the rack 13 of the nut 7 upon translation of the nut 7 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the leg 3, the arm 4, the head 5 and the foot 2 to be pushed towards a more extended position.
  • the scissor lifting arrangement 1 further comprises a locking arrangement 17 enabling selective locking and release of the nut 7 to the nut-carrier 8, as illustrated in figure 7 , which when locked inhibits translation of the nut 7 at the nut-carrier 8.
  • the locking arrangement in 17 some embodiments comprises a ratchet 17 arranged to selectively lock the nut 7 to the nut-carrier 8 at either of the first end R1 and the second end R2 of the predetermined range R.
  • the locking arrangement 17 further comprises a manual release actuator (not shown) for effecting manual release of the nut 7 when locked to the nut-carrier 8, and in other embodiments the locking arrangement 17 further comprises an automatic release actuator (not shown) for effecting automatic release of the nut 7 when locked to the nut-carrier 8 at a predetermined separation distance S between the foot 2 and head 5.
  • the lifting arrangement 1 further comprises a damping arrangement (not shown) arranged to damp translation of the nut 7 at the nut-carrier 8.
  • the damping arrangement in some embodiments comprises at least one of a rubber bushing, a fluid damper, a spring.
  • a full scissor lifting arrangement 1 has a foot 2 for resting the lifting arrangement against a supporting surface.
  • Figure 8a illustrates the full scissor lifting arrangement 1 in a collapsed position, figure 8b in an intermediate position and figure 8c in an extended position.
  • the scissor lifting arrangement 1 further comprises a first arm 4 and a second arm 4' and a first leg 3 and a second leg 3', each having respective first and second longitudinal ends (4a, 4b, 4'a, 4'b, 3a, 3b, 3'a, 3'b).
  • the first longitudinal end 4a of the first arm 4 is pivotally coupled to the first leg 3 at the second longitudinal end 3b thereof to form a first knee 18.
  • the first leg 3 and the second leg 3' are pivotally coupled to the foot 2 at the respective first longitudinal ends 3a, 3'a thereof.
  • the first longitudinal end 4'a of the second arm 4' is pivotally coupled to the second leg 3' at the second longitudinal end 3'b thereof to form a second knee 19.
  • a head 5 is also provided for supporting a load to be lifted.
  • the head 5 is pivotally coupled to the respective second longitudinal ends 4b, 4'b of the arms 4, 4'.
  • a primary actuation mechanism comprising a drive screw 6, a nut 7 and a nut-carrier 8 is provided, by which a separation distance S between the head 5 and the foot 2 is adjustable between an extended position, as illustrated in figure 8c , and a collapsed position, as illustrated in figure 8a .
  • the nut 7 is held by the nut-carrier 8 at which, during rotation of the drive screw 6, it is arranged to be translated between a first end R1 and a second end R2 of a predetermined range R.
  • the drive screw 6 and nut-carrier 8 are respectively operatively coupled to the arms 4, 4' and legs 3, 3' at the first and second knees 18, 19.
  • Rotation of the drive screw 6 in a first direction, from a minimum separation distance, as illustrated in figure 8a causes translation of the nut 7 towards the first end R1 of the predetermined range R.
  • the arms 4, 4'and legs 3, 3' will be pulled towards respective more extended positions, which increases the separation distance S.
  • Subsequent rotation of the drive screw 6 in a second direction, opposite to the first direction decreases the separation distance S, and sustained rotation of the drive screw 6 in the second direction, causes translation of the nut 7 towards the second end R2 of the predetermined range R at the minimum separation distance, as illustrated in figure 8a .
  • a secondary actuation mechanism is arranged to be effected by translation of the nut 7 from the second end R2 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the legs 3, 3' and the arms 4, 4' to be pushed towards a more extended position, which increases the separation distance S.
  • Such alternative secondary actuation mechanisms include: a combination of a wedge shaped nut 7 and at least one roller 9a; a combination of a nut 7 and at least one curved cam 11; a combination of a nut 7 and at least one linkarm 12; a combination of a nut 7 having an external rack 13 and a at least one pinion gear 14 arranged to drive a lifter 15; and a combination of a nut 7 having an external rack 13 and a at least one pinion gear 14 carrying a cam 16, as illustrated in figures 3 - 6 .
  • the full scissor lifting arrangement 1 according to figures 8a, 8b and 8c can also be provided with a locking arrangement 17 enabling selective locking and release of the nut 7 to the nut-carrier 8, which, as illustrated in the figure 7 embodiment, can comprise a ratchet 17 arranged to selectively lock the nut 7 to the nut-carrier 8 at either of the first end R1 and the second end R2 of the predetermined range R.
  • the full scissor lifting arrangement 1 according to figures 8a, 8b and 8c can also, in some embodiments, be provided with a manual release actuator (not shown) for effecting manual release of the nut 7 when locked to the nut-carrier 8, or an automatic release actuator (not shown) for effecting automatic release of the nut 7 when locked to the nut-carrier 8 at a predetermined separation distance S between the foot 2 and head 5.
  • a manual release actuator not shown
  • an automatic release actuator for effecting automatic release of the nut 7 when locked to the nut-carrier 8 at a predetermined separation distance S between the foot 2 and head 5.
  • the full scissor lifting arrangement 1 according to figures 8a, 8b and 8c can also, in some embodiments, be provided with a damping arrangement (not shown) arranged to damp translation of the nut 7 at the nut-carrier 8, which damping arrangement in some embodiments can comprise at least one of a rubber bushing, a fluid damper, and a spring.
  • a scissor lifting cluster arrangement as illustrated in figure 9 , which comprises a plurality of scissor lifting arrangements 1, as above, the drive screws 6 of which are arranged to be operated in synchronicity.
  • a scissor lifting cluster arrangement as above, where the drive screws 6 of the scissor lifting arrangements 1 are arranged to be operated in synchronicity provides for highly stable lifting applications involving multiple scissor lifting arrangements 1 which are perfectly synchronized with each other and operable with one common crank.
  • a vehicle lifting jack comprising a scissor lifting arrangement 1 as described in the foregoing.
  • a vehicle lifting jack that comprises a scissor lifting arrangement 1, as above, is able to lift a vehicle from a low position and may also be collapsed and stowed efficiently in the vehicle.
  • a scissor lifting arrangement 1 comprises a foot 2 integral with a supporting structure, such as the base of a trailer (not shown) or similar.
  • the scissor lifting arrangement 1 further comprises at least one arm 4 having first and second longitudinal ends 4a, 4b, the first longitudinal end 4a of the arm 4 being pivotally coupled to a nut-carrier 8.
  • the arm 4 is illustrated in dashed lines in figures 10a, 10b , 10c and 10d , in order not to obscure further details of the arrangement.
  • a head 5 is integral with a lifting structure (e.g. platform or flatbed) arranged at the trailer, and is provided for supporting a load to be lifted.
  • the lifting structure 5 is pivotally coupled to the second longitudinal end 4b of the arm 4.
  • a guide mechanism (not shown) for guiding the movement of the lifting structure 5 in relation to the supporting structure 2 is further provided.
  • a number of different varieties of such mechanisms suitable to be used with this embodiment are well known to the person skilled in the art, e.g. scissor mechanisms, telescopic mechanisms, link arms, sliding surfaces, wires, hinges etc., and will therefore not be elucidated further herein.
  • a primary actuation mechanism which comprises a drive screw 6, a nut 7 and the nut-carrier 8, by which a separation distance S between the lifting structure 5 and the supporting structure 2 is adjustable between an extended and a collapsed position.
  • the nut 7 is held by the nut-carrier 8 at which, during rotation of the drive screw 6, it is arranged to be translated between a first end R1 and a second end R2 of a predetermined range R.
  • the drive screw 6 is operatively coupled to the supporting structure 2, e.g. through the drive screw 6 being rotatable through a cross element 10, (e.g.
  • a secondary actuation mechanism arranged to be effected by translation of the nut 7 from the second end R2 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the arm 4 and the lifting structure 5 to be pushed towards a more extended position with respect to the supporting structure 2, which increases the separation distance S.
  • the secondary actuation mechanism can be based on a combination of a wedge shaped nut 7 and at least one cam 9 arranged at at least one of the arm 4 and the lifting structure 5, in figures 10a, 10b , 10c and 10d arranged at the lifting structure 5, such that the cam 9 will be contacted by the wedge shaped nut 7 upon translation of the nut 7 towards the first end R1 of the predetermined range R at the nut-carrier 8 to cause at least one of the arm 4 and the lifting structure 5 to be pushed towards a more extended position.
  • this secondary actuation mechanism can be based on a combination of a wedge shaped nut 7 and at least one roller 9a, a combination of a nut 7 and at least one curved cam 11, a combination of a nut 7 and at least one linkarm 12, a combination of a nut 7 having an external rack 13 and a at least one pinion gear 14 arranged to drive a lifter 15, and a combination of a nut 7 having an external rack 13 and a at least one pinion 14 gear carrying a cam 16, as in some of the previous embodiments described herein and as illustrated in figures 2 through 6 .
  • this secondary actuation mechanism further can comprise a locking arrangement 17 enabling selective locking and release of the nut 7 to the nut-carrier 8, when locked inhibiting translation of the nut 7 at the nut-carrier 8, where the locking arrangement 17 may for such selective locking and release e.g. comprise a ratchet 17 arranged to selectively lock the nut 7 to the nut-carrier 8 at either of the first end R1 and the second end R2 of the predetermined range R, as in some of the previous embodiments described herein and as illustrated in figures 7a and 7b .
  • the locking arrangement 17 may for such selective locking and release e.g. comprise a ratchet 17 arranged to selectively lock the nut 7 to the nut-carrier 8 at either of the first end R1 and the second end R2 of the predetermined range R, as in some of the previous embodiments described herein and as illustrated in figures 7a and 7b .
  • it may also comprise a manual release actuator (not shown) for effecting manual release of the nut 7 when locked to the nut-carrier 8, an automatic release actuator (not shown) for effecting automatic release of the nut 7 when locked to the nut-carrier 8 at a predetermined separation distance S between the supporting structure 2 and lifting structure 5 and a damping arrangement (not shown) arranged to damp translation of the nut 7 at the nut-carrier 8, as in some of the previous embodiments described herein.
  • a manual release actuator for effecting manual release of the nut 7 when locked to the nut-carrier 8
  • an automatic release actuator for effecting automatic release of the nut 7 when locked to the nut-carrier 8 at a predetermined separation distance S between the supporting structure 2 and lifting structure 5
  • a damping arrangement not shown
  • the scissor lifting arrangements 1 described herein will work equally well if placed up-side-down, as compared to the views of figures 1-4 and 8-10 of the drawings, in which case the foots 2 should appropriately be referred to as heads, and the heads 5 as foots.
  • the scissor lifting arrangements 1 described herein will work equally well if placed sideways and, e.g. used for lateral displacement or pressure application.

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Claims (16)

  1. Scherenhubanordnung (1), umfassend:
    einen Fuß (2) zum Abstützen der Hubanordnung (1) gegen eine Stützfläche;
    mindestens einem Schenkel (3) mit ersten und zweiten Längsenden (3a, 3b), wobei der Schenkel (3) an seinem ersten Längsende (3a) schwenkbar mit dem Fuß (2) verbunden ist;
    mindestens einen Arm (4) mit ersten und zweiten Längsenden (4a, 4b), wobei das erste Längsende (4a) des Arms (4) schwenkbar mit dem Schenkel (3) verbunden ist;
    einen Kopf (5) zum Tragen einer zu hebenden Last, wobei der Kopf (5) schwenkbar mit dem zweiten Längsende (4b) des Arms (4) gekoppelt ist;
    ein Hauptbetätigungsmechanismus, umfassend eine Antriebsschraube (6), eine Mutter (7) und einen Mutternträger (8), mit denen ein Trennungsabstand (S) zwischen dem Kopf (5) und dem Fuß (2) zwischen einer verlängerten und eine kollabierten Position einstellbar ist;
    dadurch gekennzeichnet, dass
    die Mutter (7) durch den Mutternträger (8) gehalten wird, an dem sie während der Drehung der Antriebsschraube (6) so angeordnet ist, dass sie zwischen einem ersten Ende (R1) und einem zweiten Ende (R2) von einem vorbestimmten Bereich (R) verschoben wird;
    die Antriebsschraube (6) und der Mutternträger (8) jeweils mit einem Arm (4) und einem Schenkel (3) wirkverbunden sind, so dass die Drehung der Antriebsschraube (6) in einer ersten Richtung, in einem minimalen Trennungsabstand (S), eine Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) bewirkt, wobei nach einer anhaltenden Drehung der Antriebsschraube (6) in der ersten Richtung der Arm (4) und der Schenkel (3) in Richtung der jeweiligen weiter verlängerten Positionen gezogen werden, welche den Trennungsabstand (S) vergrößert;
    und anschließendes Drehen der Antriebsschraube (6) in einer zweiten Richtung, entgegengesetzt zu der ersten Richtung, verringernd den Trennungsabstand (S), und anhaltende Drehung der Antriebsschraube (6) in der zweiten Richtung, bewirkt eine Übersetzung der Mutter (7) in Richtung des zweiten Endes (R2) des vorbestimmten Bereichs (R) bei minimalem Trennungsabstand (S);
    einen sekundären Betätigungsmechanismus, der so angeordnet ist, dass er durch Übersetzung der Mutter (7) von dem zweiten Ende (R2) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) bewirkt, mindestens eines des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) zu bewirken, um in eine weiter ausgefahrene Position gedrückt zu werden, was den Trennungsabstand (S) vergrößert.
  2. Scherenhubanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der sekundäre Betätigungsmechanismus auf einer Kombination einer keilförmigen Mutter (7) und mindestens einer Nocke (9) basiert, die an mindestens einem des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) angeordnet ist, so dass der Nocken (9) durch die keilförmige Mutter (7) bei der Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) kontaktiert wird, um zu bewirken, dass mindestens eines des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) in eine weiter ausgefahrene Position geschoben werden.
  3. Scherenhubanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der sekundäre Betätigungsmechanismus auf einer Kombination einer keilförmigen Mutter (7) und wenigstens einer Rolle (9a) basiert, die an mindestens einem des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) angeordnet ist, so dass die Rolle (9a) durch die keilförmige Mutter (7) bei der Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) kontaktiert wird, um zu bewirken, dass mindestens eines des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) in eine weiter ausgefahrene Position geschoben werden.
  4. Scherenhubanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der sekundäre Betätigungsmechanismus auf einer Kombination einer Mutter (7) und wenigstens einer gekrümmten Nocke (11) basiert, die an mindestens einem des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) angeordnet ist, so dass der gekrümmte Nocken (11) durch die Mutter (7) bei der Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) kontaktiert wird, um zu bewirken, dass mindestens eines des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) in eine weiter ausgefahrene geschoben werden.
  5. Scherenhubanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der sekundäre Betätigungsmechanismus auf einer Kombination einer Mutter (7) und mindestens einem Gelenkarm (12) basiert, der an mindestens einem des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) angeordnet ist, so dass der Gelenkarm (12) durch die Mutter (7) bei der Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) kontaktiert wird, um zu bewirken, dass mindestens eines des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) in eine weiter ausgefahrene Position geschoben werden.
  6. Scherenhubanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der sekundäre Betätigungsmechanismus auf einer Kombination einer Mutter (7) mit einer äußeren Zahnstange (13) und einem mindestens einen Ritzel (14) basiert, um einen Heber (15) anzutreiben, der so angeordnet ist, dass er an mindestens einen des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) derart arbeitet, dass das Ritzel (14) durch die Zahnstange (13) der Mutter (7), bei der Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) gedreht wird, um zu bewirken, dass mindestens eines des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) in eine weiter ausgefahrene Position geschoben werden.
  7. Scherenhubanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der sekundäre Betätigungsmechanismus auf einer Kombination einer Mutter (7) mit einer äußeren Zahnstange (13) und einem mindestens einen Ritzel (14) mit einer Nocke (16) basiert, der so angeordnet ist, dass er an mindestens einen des Schenkels (3), des Arms (4), des Kopfs (5) und des Fußes (2) derart arbeitet, dass das Ritzel (14) durch die Zahnstange (13) der Mutter (7), bei der Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) gedreht wird, um zu bewirken, dass mindestens eines des Schenkels (3), des Armes (4), des Kopfs (5) und des Fußes (2) in eine weiter ausgefahrene Position geschoben werden.
  8. Scherenhubanordnung (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass sie weiterhin eine Verriegelungsanordnung (17) aufweist, die ein selektives Verriegeln und Lösen der Mutter (7) an dem Mutternträger (8) ermöglicht, in dem verriegelten Zustand die Übersetzung der Mutter (7) an dem Mutternträger (8) verhindert.
  9. Scherenhubanordnung (1) nach Anspruch 8, dadurch gekennzeichnet, dass die Verriegelungsanordnung (17) eine Sperrklinke (17) umfasst, die angeordnet ist, um selektiv die Mutter (7) an dem Mutternträger (8) entweder an dem ersten Ende (R1), oder an dem zweiten Ende (R2) des vorbestimmten Bereichs (R) zu verriegeln.
  10. Scherenhubanordnung (1) nach einem der Ansprüche 8 bis 9, dadurch gekennzeichnet, dass sie weiterhin einen manuellen Freigabeaktuator zum Bewirken einer manuellen Freigabe der Mutter (7), wenn sie an dem Mutternträger (8) verriegelt ist, umfasst.
  11. Scherenhubanordnung (1) nach einem der Ansprüche 8 bis 9, dadurch gekennzeichnet, dass sie weiterhin einen automatischen Freigabeaktuator zum automatischen Lösen der Mutter (7), in dem verriegelten Zustand mit dem Mutternträger (8) bei einen vorbestimmten Trennungsabstand (S) zwischen dem Fuß (2) und dem Kopf (5), umfasst.
  12. Scherenhubanordnung (1) nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass sie weiterhin eine Dämpfungsanordnung umfasst, die angeordnet ist, um die Übersetzung der Mutter (7) an dem Mutternträger (8) zu dämpfen.
  13. Scherenhubanordnung (1) nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass:
    sie einen ersten Arm (4) und einen zweiten Arm (4') und einen ersten Schenkel (3) und einen zweiten Schenkel (3') umfasst; und dass
    das erste Längsende (4a) des ersten Arms (4) an seinem zweiten Längsende (3b) schwenkbar mit dem ersten Schenkel (3) gekoppelt ist, um ein erstes Knie (18) zu bilden;
    der zweite Schenkel (3') erste und zweite Längsenden (3'a, 3'b) aufweist, der zweite Schenkel (3') an seinem ersten Längsende (3'a) schwenkbar mit dem Fuß (2) verbunden ist;
    der zweite Arm (4') erste und zweite Längsenden (4'a, 4'b) aufweist, wobei das erste Längsende (4'a) des zweiten Arms (4') schwenkbar mit dem zweiten Schenkel (3') an seinem zweiten Längsende (3'b) verbunden ist, um ein zweites Knie (19) zu bilden;
    die Antriebsschraube (6) und der Mutternträger (8) jeweils mit den Armen (4, 4') und Schenkel (3, 3') an den ersten und zweiten Knien (18, 19) wirkverbunden sind.
  14. Scherenhubanordnung, dadurch gekennzeichnet, dass sie eine Vielzahl von Scherenhubanordnungen (1) nach einem der Ansprüche 1 bis 13 umfasst, deren Antriebsschrauben (6) so angeordnet sind, dass sie synchron betrieben werden.
  15. Wagenheber, dadurch gekennzeichnet, dass er eine Scherenhubanordnung (1) nach einem der Ansprüche 1 bis 13 umfasst.
  16. Scherenhubanordnung (1), umfassend:
    einen Fuß (2), der mit einer Stützstruktur einstückig ist;
    mindestens einen Arm (4) mit ersten und zweiten Längsenden (4a, 4b), dadurch gekennzeichnet, dass das erste Längsende (4a) des Arms (4) schwenkbar mit einem Mutternträger (8) gekoppelt ist;
    einen Kopf (5), der einstückig mit einer Hebestruktur zum Tragen einer zu hebenden Last ist, wobei die Hebestruktur (5) schwenkbar mit dem zweiten Längsende (4b) des Arms (4) gekoppelt ist;
    einen Führungsmechanismus zum Führen der Bewegung der Hebestruktur (5) in Bezug auf die Tragstruktur (2);
    ein primärer Betätigungsmechanismus, umfassend eine Antriebsschraube (6), eine Mutter (7) und den Mutternträger (8), mit denen ein Trennungsabstand (S) zwischen der Hebestruktur (5) und der Tragstruktur (2) zwischen einer ausgefahrenen und einer kollabierten Position einstellbar ist;
    die Mutter (7) wird durch den Mutternträger (8) gehalten, an dem sie während der Drehung der Antriebsschraube (6) so angeordnet ist, dass sie zwischen einem ersten Ende (R1) und einem zweiten Ende (R2) eines vorbestimmten Bereichs (R) verschoben wird;
    wobei die Antriebsschraube (6) mit der Tragstruktur (2) und der Mutternträger (8) mit dem Arm (4) angeordnet sind, so dass die Drehung der Antriebsschraube (6) in einer ersten Richtung, in einem minimalen Trennungsabstand (S), eine Übersetzung der Mutter (7) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) bewirkt, wobei nach einer anhaltenden Drehung der Antriebsschraube (6) in der ersten Richtung der Arm (4) in Richtung einer weiter ausgefahrenen Position gezogen wird, welche den Trennungsabstand (S) vergrößert;
    und anschließendes Drehen der Antriebsschraube (6) in einer zweiten Richtung, entgegengesetzt zu der ersten Richtung, verringernd den Trennungsabstand (S), und anhaltende Drehung der Antriebsschraube (6) in der zweiten Richtung, die eine Übersetzung der Mutter (7) in Richtung des zweiten Endes (R2) des vorbestimmten Bereichs (R) bei minimalem Trennungsabstand (S) bewirkt;
    einen sekundären Betätigungsmechanismus, der so angeordnet ist, dass er durch Übersetzung der Mutter (7) von dem zweiten Ende (R2) in Richtung des ersten Endes (R1) des vorbestimmten Bereichs (R) an dem Mutternträger (8) bewirkt wird, um mindestens einen des Arms (4) und der Hebestruktur (5) zu bewirken, um in eine weiter ausgefahrene Position in Bezug auf die Stützstruktur (2) gedrückt zu werden, was den Trennungsabstand (S) vergrößert.
EP15728501.6A 2014-06-11 2015-06-10 Scherenhubanordnung Active EP3154895B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14171916.1A EP2955148A1 (de) 2014-06-11 2014-06-11 Scherenhubanordnung
PCT/EP2015/062922 WO2015189260A1 (en) 2014-06-11 2015-06-10 Scissor lifting arrangement

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EP3154895A1 EP3154895A1 (de) 2017-04-19
EP3154895B1 true EP3154895B1 (de) 2018-08-01

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EP15728501.6A Active EP3154895B1 (de) 2014-06-11 2015-06-10 Scherenhubanordnung

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1991255A (en) * 1932-02-29 1935-02-12 Martin Louis Joseph Henri Elevator for any applications
US2560797A (en) * 1946-07-10 1951-07-17 Marion W Humphreys Jack
GB2125007B (en) 1982-08-09 1986-09-10 Kenneth Mortimer Scissor type jack
DE10014767A1 (de) * 2000-03-27 2001-10-18 Krupp Bilstein Gmbh Wagenheber

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EP3154895A1 (de) 2017-04-19
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