EP4003897A1 - Appareil de levage - Google Patents

Appareil de levage

Info

Publication number
EP4003897A1
EP4003897A1 EP20710033.0A EP20710033A EP4003897A1 EP 4003897 A1 EP4003897 A1 EP 4003897A1 EP 20710033 A EP20710033 A EP 20710033A EP 4003897 A1 EP4003897 A1 EP 4003897A1
Authority
EP
European Patent Office
Prior art keywords
locking
disc
disk
control
contour
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
Application number
EP20710033.0A
Other languages
German (de)
English (en)
Other versions
EP4003897B1 (fr
EP4003897C0 (fr
Inventor
Detlef Struck
Wolfram SCHNEEBECK
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.)
Columbus McKinnon Industrial Products GmbH
Original Assignee
Columbus McKinnon Industrial Products GmbH
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 Columbus McKinnon Industrial Products GmbH filed Critical Columbus McKinnon Industrial Products GmbH
Publication of EP4003897A1 publication Critical patent/EP4003897A1/fr
Application granted granted Critical
Publication of EP4003897B1 publication Critical patent/EP4003897B1/fr
Publication of EP4003897C0 publication Critical patent/EP4003897C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/04—Driving gear manually operated
    • B66D1/06—Safety cranks for preventing unwanted crank rotation and subsequent lowering of the loads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/12—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable
    • B66D3/14—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable lever operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
    • B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/32—Detent devices
    • B66D5/34—Detent devices having latches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/05—Brakes with mechanisms with latches for hoists or similar devices

Definitions

  • the invention relates to a hoist, in particular a lever hoist, according to the features in the preamble of claim 1.
  • a hoist in particular a lever hoist, usually uses round steel chains as a support or traction device and is used to lift, lower and pull loads.
  • the lifting movement can be generated by manual operation, compressed air or an electric motor.
  • the present invention particularly relates to a hand-operated lever hoist.
  • a lever-operated hoist is known from DE 41 05 050 C2, which is also referred to as a pull stroke or chain hoist.
  • the hoist has a carrying hook as the upper fastening element and a load hook as the lower stop element.
  • the upper fastening element and the lower stop element are via a Housing indirectly connected to one another.
  • the stop element is connected via a load chain as a traction mechanism to a traction mechanism drive, which is located in the housing of the hoist.
  • the traction mechanism drive can be set in rotation within the housing by a pivoting movement of a hand lever.
  • the lever arm engages in a transmission device, which in turn is connected to the traction drive. In this way it is possible to relocate or lash an object.
  • the traction drive includes a load pressure brake, a load chain wheel and a gear, the gear often being designed as a planetary gear.
  • the hand lever and the ratchet wheel of the ratchet mechanism sit at one end of a drive shaft which passes through the load pressure brake and the load chain wheel.
  • the gearbox At the other end of the drive shaft is the gearbox, which is then connected to the load chain wheel to transmit torque.
  • the load pressure brake is composed of a ratchet disc with recesses or teeth on its outer circumference, two friction elements, mostly friction discs or linings, located on both sides of the ratchet disc, and two pawls linked to the housing, which are pressed against the ratchet disc under the influence of ratchet springs .
  • the two friction elements enter into a frictional connection on the one hand with the ratchet wheel and on the other hand with a pressure washer or the ratchet wheel attached to the shaft.
  • the ratchet wheel is axially displaceable on a movement thread of the drive shaft.
  • the load pressure brake has the task of holding the load carried by the hoist at the respective height or position when the ratchet wheel is stationary. Then the ratchet wheel is pressed against the pressure disk via the ratchet wheel disk and the integrated friction elements.
  • the pawls are located in the circumferential recesses of the ratchet wheel. If the ratchet wheel is rotated in the lifting direction, the pawls slide over the teeth of the ratchet wheel until the ratchet wheel comes to a standstill. Then the pawls snap back into the recesses in the ratchet disk.
  • the ratchet wheel When lowering the load, the ratchet wheel turns in the opposite direction rotated, whereby it slides axially on the movement thread of the drive shaft and the frictional contact with the friction elements of the ratchet disk and the pressure disk is canceled.
  • the load can drop until the rotating shaft compensates for the axial play again.
  • EP 0 279 144 B1 includes a safety brake for a driven shaft in the prior art. This comprises a brake disk and a cam disk for a roller which can be pressed onto it by a release spring and which, when the shaft rotates too high, causes a pawl to engage in a toothed ring arranged on the shaft.
  • EP 3 395 746 A1 proposes a further safety device in the form of a safety brake which uses the centrifugal force of centrifugal elements to limit the speed.
  • the invention is based on the object of providing a lifting device that is improved in terms of safety and operational technology, in particular a lever hoist, in which an impermissible increase in the speed of the drive shaft is prevented.
  • a hoist in particular a lever hoist, comprises a housing in which a load chain wheel and a drive shaft that drives the load chain wheel via a transmission are rotatably mounted.
  • a drive, a load pressure brake and a safety brake are also provided.
  • a load chain can be moved via the load chain wheel.
  • the safety brake has a locking disc with ratchet teeth and a control disc with control cams and a catch hook.
  • the locking disk and the control disk can be rotated relative to one another, the rotation being limited by a rotation path limitation.
  • the catch hook is arranged to be pivotable.
  • the catch hook is two-legged and has a latch contour at a front end and a tactile contour at a rear end.
  • the catch hook is assigned to the locking disk and the control disk in such a way that the feeler contour, under the influence of a spring element, rests against the control disk, in particular the outer contour of the control disk, and slides along it when the control disk is rotated.
  • the pawl contour can be brought into locking engagement with a locking tooth of the locking disk.
  • the catching hook is guided with the tactile contour over the control disk and the pawl contour does not engage the locking disk.
  • the feeler contour of the catch hook lifts off the control disc or the control cam of the control disc and the pawl contour of the catch hook snaps into a ratchet tooth of the locking disc.
  • the locking disk is stopped while the control disk, which is arranged coaxially behind the locking disk, continues to rotate along a predetermined rotational path of the rotational path limitation until the rotational path is exhausted and the locking disk and the control disk lock against each other.
  • the release includes a reset button and a blocking body which is designed to block the locking disk while the control disk connected to the drive shaft is rotated in the stroke direction (clockwise) until the two disks are aligned with each other again in the starting position.
  • the blocking body By operating the reset button, the blocking body can be brought into an unlocked position. In the unlocked position, the locking disk comes to rest on the blocking body and is held by it in such a way that the control disk can be rotated relative to the locking disk and can be rotated into the starting position.
  • the unlocking creates the possibility to unlock the safety brake from the outside without having to dismantle the device. In this way, the safety brake can be completely reset to its normal operating state, i.e. the standby mode, in the starting position of the locking disk and control disk. Unlocking is initiated by pressing the reset button. The blocking body is thereby brought into the unlocked position. The safety brake is turned clockwise using the handwheel until the locking disc comes into contact with the blocking body.
  • the reset button is preferably rotatably mounted in the housing, in particular with limited pivoting movement.
  • the reset button cooperates with a tension spring.
  • the tension spring is used to release the unlocking and to move the reset button and the blocking body back to their starting position after unlocking.
  • a practically advantageous embodiment provides that the reset button and the blocking body form a unit.
  • the unlocking device can have a catch which secures the reset button and / or the blocking body in the unlocked position.
  • the blocking body can be brought into an unlocking position by actuating the reset button, in which the locking disc is held by the blocking body in such a way that the control disc can be rotated relative to the locking disc and thus the control disc and the locking disc are again aligned congruently with one another, i.e. in the starting position are transferable.
  • the blocking body advantageously has an abutment surface on which the locking disc is supported in the unlocked position with an outer flank of a locking tooth.
  • the catch has a catch body which engages in a catch receptacle in the unlocked position.
  • the unlocking process is then carried out and the locking disk and the control disk are returned to their initial aligned position.
  • the locking disk and the control disk work together, the joint rotary movement applying such a high torque or force to the abutment surface of the blocking body that the locking body is moved, in particular lifted, out of the locking receptacle.
  • the unlocked position is then canceled and the tension spring swivels the reset button and the blocking body into the starting or neutral position.
  • a further advantageous embodiment of the hoist according to the invention provides that the blocking body has a tooth contour with a tooth flank which can be brought into engagement with a locking tooth of the locking disk. This embodiment creates the possibility of bringing the safety brake into a parking mode in which the safety brake is locked manually.
  • the reset button is also pressed until it is in the unlocked position.
  • the safety brake can then be turned counterclockwise using the handwheel until the locking tooth of the locking disk rests on the tooth flank of the tooth contour of the locking body.
  • the safety brake is then turned 45 ° further counterclockwise using the handwheel until the locking disk and the control disk are completely interlaced. In this position the safety brake engages noticeably.
  • the reset button springs back automatically or is released manually.
  • the tension spring swivels the reset button and the blocking body back into the starting position.
  • the safety brake is now locked. After a further rotation of a maximum of 45 ° counterclockwise, the safety catch of the safety brake would automatically take over the load. Further movement, in particular lowering a load, is then no longer possible.
  • the rotational path limitation has at least one cam track and a stop body which can be displaced along the cam track. In the end position, i.e. after exhaustion of the rotational path between the locking disk and the control disk, the stop body comes to a stop at the end of the cam track.
  • the curved path is preferably formed by an elongated hole.
  • the elongated hole is formed in the control disk.
  • An elongated hole is preferably designed in an arc shape with a radius around the center of the control disk. It is particularly advantageous if several elongated holes are provided offset from one another on a pitch circle in the control disk. But it is also possible that the Cam track is formed in a groove. This can be provided in the control disk or in the locking disk.
  • the stop body is preferably a pin.
  • the stop pin or pins are preferably fixed in the locking disk and protrude from it in the direction of the control disk, engaging the elongated holes.
  • latching elements are incorporated between the locking disk and the control disk. These fix the locking disk and the control disk in the starting position or in the end position.
  • the locking elements are preferably formed by balls.
  • the locking elements are held in receptacles and interact with locking surfaces.
  • An advantageous embodiment provides that the receptacles are in the control disk and the locking surfaces are formed in the locking disk.
  • a plurality of ratchet teeth are advantageously arranged in a uniformly distributed manner on the circumference of the ratchet disk.
  • several control cams are provided evenly distributed on the circumference of the control disk.
  • the control cams are formed in particular by the contour of the control disk itself.
  • the control disk is preferably configured triangularly with a rounded outer contour.
  • the control disk has a central connector provided with internal teeth. With the internal toothing, the control disk sits on a length section of the drive shaft provided with external toothing. The control disk with a central bearing section is positioned on the central connecting piece. The locking disk is secured on the socket by means of securing elements.
  • An advantageous practical embodiment provides that, in the starting position of the locking disk and control disk, the rear outer contour of the locking teeth is aligned with the outer contour of the control disk.
  • the control disk covers the adjacent flat side of the locking disk.
  • the catch hook of the catch brake is pivotably mounted on a bolt on a side plate that can be integrated into the housing.
  • the spring element is preferably a leg spring.
  • damping elements can be incorporated between the locking disc and the control disc in order to dampen the braking effect during emergency braking.
  • the woven fabric according to the invention can be used in a wide variety of applications. It can be used in any application with reversing loads, for example in overhead line construction or for personal security.
  • the hoist is compact and lightweight.
  • the additional safety function via the safety brake is implemented with just a few parts.
  • the mechanics require an active movement, so that if the spring is no longer available, the pawls of the load pressure brake are stuck, etc., the safety brake is triggered.
  • the safety brake locks automatically. As a result, the catch hook always remains in engagement even if the load oscillates.
  • FIG. 1 a lifting device according to the invention in the form of a lever block in a longitudinal section;
  • FIG. 2 shows the lever hoist in an exploded view of its components
  • FIG. 3 shows a side view of part of the lever block
  • Figure 4 is a perspective view of the safety brake
  • Figure 5 is a perspective view of the locking disk and the
  • FIG. 6 components of the safety brake in an explosion-like exploded view
  • FIG. 7 shows a view of the representation in FIG. 5 from above
  • FIG. 8 shows a section through the illustration of FIG. 7 along the line
  • FIG. 9 shows a section through the illustration of FIG. 7 along the line
  • FIG. 10 shows the illustration corresponding to FIG. 5 in a view from below
  • Figure 1 the open lever with a view of the area of
  • FIG. 12 shows the illustration corresponding to FIG. 11 in one
  • Figure 13 is a view of the safety brake of the lever train in a first
  • FIG. 14 the safety brake in a second operating situation
  • FIG. 15 the safety brake in a third operating situation
  • FIG. 16 shows the safety brake in a fourth operating situation
  • FIG. 17 the illustration of the safety brake with an unlocking at one
  • FIG. 18 shows a lever pull with an unlocking device in the standby mode
  • FIG. 19 shows the lever pull corresponding to the illustration in FIG. 18 with the safety brake locked
  • FIG. 20 shows the lever pull in a first stage of the unlocking process
  • FIG. 21 the lever pull in a second stage of the unlocking process
  • Figure 22 the lever with the representation of the first stage of a manual locking process
  • Figure 23 shows the lever pull in a second stage of a manual
  • Figures 1 and 2 show a hoist according to the invention in the form of a manually operated lever hoist 1.
  • a component of the lever hoist 1 is a housing 2, which is composed of several housing parts 3, 4 and side plates 5, 6 and spacer frame 7.
  • the lever hoist 1 has a support hook 8 as an upper fastening element and a load hook 9 as a lower stop element.
  • the support hook 8 and the load hook 9 are indirectly connected to one another via the housing 2.
  • the load hook 9 is attached to one end of a load chain 10. At the other end of the load chain 10, a chain end piece 11 is provided.
  • the load chain 10 can be moved via a traction mechanism.
  • the traction drive essentially comprises a drive 12 with a hand lever 13, a ratchet wheel 14 and a switchable ratchet mechanism 15, a load pressure brake 16, a load chain wheel 17 and a gear 18.
  • the hand lever 13 and the ratchet wheel 14 of the ratchet mechanism 15 sit at one end 19 of a Drive shaft 20, which passes through the load pressure brake 16 and the load chain wheel 17.
  • At the other end 21 of the drive shaft 20 is the transmission 18, which is connected to the load chain wheel 17 in a torque-transmitting manner.
  • a hand wheel 22 is used to move the ratchet wheel 14 axially on the drive shaft 20 in order to actuate a freewheel mechanism 23 of the lever hoist 1.
  • the load pressure brake 16 has a ratchet wheel disk 24 provided with teeth on its outer circumference.
  • the ratchet disk 24 is provided on both sides with friction elements 25 in the form of friction linings.
  • the load pressure brake 16 has two locking pawls 26 which are pivotably mounted on the side plate 6 in the housing 2 and which are pressed against the locking wheel disk 24 under the influence of locking hook springs 27.
  • the load pressure brake 16 includes a pressure disk 28 on which the ratchet disk 24 is mounted.
  • the ratchet wheel 14 is axially displaceable on a movement thread 29 of the drive shaft 20.
  • FIG. 3 shows the lever block 1 with the ratchet wheel 14, hand lever 13 and hand wheel 22 removed.
  • the load pressure brake 16 has the task of holding the load carried by the lever hoist 1 when the ratchet wheel 14 is stationary. Then the ratchet wheel 14 is pressed against the pressure disk 28 via the ratchet wheel disk 24 and the integrated friction elements 25.
  • the ratchet pawls 26 are located in the circumferential recesses of the ratchet wheel 24. If the ratchet wheel 14 is rotated in the lifting direction, the ratchet pawls 26 slide over the teeth of the ratchet wheel disk 24 until the ratchet wheel 14 comes to a standstill. Then the pawls 26 snap back into the recess of the ratchet wheel 24.
  • the ratchet wheel 14 When the load is lowered, the ratchet wheel 14 is rotated in the opposite direction, whereby it slides axially on the movement thread 29 of the drive shaft 20 and the frictional contact with the friction elements 25 of the ratchet wheel 24 and the Pressure disc 28 is canceled. The load can then drop until the rotating drive shaft 20 compensates for the axial play again.
  • the lever hoist 1 has a safety brake 30, 31.
  • the safety brake 30, 31 has the task of performing emergency braking in extreme situations in which the drive shaft 20 can rotate at such a high speed that the load pressure brake 16 no longer engages due to inertia.
  • a safety brake 30 and its mode of operation is described with reference to FIGS. 4 to 17.
  • a corresponding embodiment of a safety brake 31 is also shown in FIGS. 18 to 23. Components or component components that correspond to one another are provided with the same reference symbols.
  • the safety brake 30, 31 is arranged coaxially below or behind the load pressure brake 16 in the direction of the load chain wheel 17.
  • the safety brake 30, 31 has a locking disk 32 with locking teeth 33 and a control disk 34 with control cams 35 and a catch hook 36. On the circumference of the locking disk 32, a plurality of locking teeth 33, three in the exemplary embodiment, are arranged evenly distributed.
  • the control disk 34 has a triangular configuration with control cams 35 which are rounded on its circumference.
  • the control disk 34 has a central connector 38 provided with internal teeth 37, on which the locking disk 32 with a central bearing section 39 is positioned and secured in position by securing elements 40, 41.
  • the control disk 34 and, together with the control disk 34, the locking disk 32 are held on a threaded section 43 of the drive shaft 20 provided with an external toothing 42 via the connecting piece 38 and the internal toothing 37.
  • the catch hook 36 is pivotably arranged on the side plate 5 of the lever hoist 1. With the incorporation of a spring element 44 in the form of a leg spring, the catch hook 36 is mounted on a bolt 45 on the side plate 5 and secured by a securing ring 46. The mounting of the catch hook 36 on the bolt 45 is in the middle length range of the catch hook 36, so that the catch hook 36 is mounted like a rocker.
  • the locking disk 32 and the control disk 34 can be rotated relative to one another.
  • the rotation of locking disk 32 and control disk 34 relative to one another is limited by a rotation limit 47.
  • the rotational path limitation 47 comprises a cam track 48 which is formed in an elongated hole 49 in the shape of a circular arc segment in the control disk 34.
  • a stop body 50 in the form of a pin can be displaced along the cam track 48. It can be seen that three elongated holes 49 are arranged uniformly offset on a pitch circle in the control disk 34. Correspondingly, three pins are incorporated as stop bodies 50 in assembly openings 51 of the locking disk 32.
  • the stop bodies 50 protrude in the direction of the control disk 34 with respect to the locking disk 32 and engage in the elongated holes 49.
  • the rotational path limitation 47 enables the locking disk 32 to be rotated by 45 ° with respect to the control disk 34.
  • Latching elements 52 in the form of steel balls are incorporated between the locking disk 32 and the control disk 34.
  • the locking elements 52 fix the locking disk 32 and the control disk 34 in the initial position or in the end position after rotation.
  • the latching elements 52 are held in receptacles 53 in the control disc 34 and contact spherical segment-shaped latching surfaces 54 in the locking disc 32 and cooperate with them in a counter-bearing and movement-inhibiting manner.
  • the catch hook 36 has a pawl contour 56 at a front end 55.
  • the pawl contour 56 has a pointed catch tooth 57 with a front catch flank 58, which is configuratively adapted to a front locking flank 59 of a locking tooth 33 of the locking disk 32.
  • a tactile contour 61 is formed on the catch hook 36 at the rear end 60.
  • the rear end 60 of the catch hook 36 is rounded.
  • the spring element 44 has the effect that the pawl contour 56 lies outside the outer circumference of the locking disk 32 during normal operation. In normal operation, the catch hook 36 slides with the rear feeler contour 61 along the control disk 34. The front latch contour 56 is lifted out.
  • the tracer contour 61 of the catch hook 36 lifts off the control disk 34 or the control cam 35 due to the inertia and the acting acceleration forces.
  • the catch hook 36 tilts and rotates around the bolt 35 in the locking disk 32.
  • the pawl contour 56 of the catch hook 36 snaps into a locking tooth 33 of the locking disk 32 and there comes to rest with the catching flank 58 on the locking flank 59.
  • the locking disk 32 is stopped while the control disk 34 arranged coaxially behind it continues to rotate along the predetermined rotational path of the rotational path limiter 47. The rotation takes place until the stop bodies 50 come to the stop at the end 62 of the elongated holes 49 located in the direction of rotation.
  • the locking disk 32 and the control disk 34 are then blocked against one another. In this way, a positive connection between the drive shaft 20 and the lever block 1 is established. Any further spinning of the load chain wheel 17 and the load chain 10 will stop.
  • FIG. 11 shows a normal situation of load pressure brake 16 and safety brake 30.
  • the pawls 26 engage in the ratchet disk 24 and hold the load.
  • Figure 12 shows a problem situation.
  • the pawls 26 of the load pressure brake 16 are not free to move.
  • the pawls 26 do not engage the ratchet disk 24.
  • a load cannot be held. It can be dangerous
  • An excessive speed increase in the opposite direction to the pulling direction of the lever hoist 1 is associated with a noise in the load chain 10.
  • Figures 13 and 14 show the safety brake 30 each in a normal situation or starting position.
  • the locking disk 32 and the control disk 34 are aligned such that the rear outer contour of the locking teeth 33 coincides with the outer contour of the control disk 32.
  • the tactile contour 61 of the catch hook 36 is pressed against the outer contour of the control disk 34 by the spring force of the leg spring and slides along the control cam 35.
  • the tactile contour 61 lies both in the top dead center of the control disk 34 (FIG. 13) and in the bottom dead center of the control disk 34 ( 14) on a control cam 35.
  • the front pawl contour 56 of the catch hook 36 is lifted out of the effective area of the locking disk 32 or its locking teeth 33.
  • the feeler contour 61 of the safety hook 36 is accelerated outward and lifts off the control disk 34.
  • the front fang 57 of the pawl contour 56 snaps into the locking disk 32 (see FIG. 15) and comes to rest with its front flank 58 blocking the locking flank 59 of a locking tooth 33 (see FIG. 16).
  • the control disk 34 rotates, driven by the load, by 45 ° in the counterclockwise direction (arrow P1) and thereby locks the ratchet wheel 14. This effect is self-reinforcing; H. the catch hook 36 drops the deeper the more the tactile contour 61 on the opposite side is raised by the control disk 34.
  • An unlocking device 63 is provided in order to release the blocking of the safety brake 30 and to set the control disk 34 and the locking disk 32 back to their initial aligned state.
  • this includes a reset button 64 in the form of a slide for actuating the unlocking device 63 and a blocking body 66 under the influence of a tension spring 65.
  • the reset button 64 By pressing the reset button 64 (arrow P2), it blocks the locking disc 32 with the blocking body 66 and holds it so that the locking disk 32 on a Rotation is prevented while the control disk 34 is actuated in the lifting direction (clockwise) (arrow P3) via the hand wheel 22 or the hand lever 13. In this way, the locking disk 32 and the control disk 34 are displaced relative to one another and brought into their initial aligned position.
  • the lever hoist 1 shown in FIGS. 18 to 23 has a safety brake 31, which corresponds in structure and mode of operation to the safety brake 30 explained above.
  • the safety brake 31 has a locking disk 32 with locking teeth 33 and a control disk 34 with locking cams 35 and a safety catch 36.
  • the lever hoist 1 has a release 63.
  • the unlocking device 63 has a reset button 64 and a blocking body 66 which functionally form a unit 67.
  • the reset button 64 and the blocking body 66 are non-positively and positively connected to one another.
  • the reset button 64 is rotatable or pivotable in the housing 2 of the lever hoist 1, mounted about a bolt 68.
  • the reset button 64 interacts with a tension spring 65 which is mounted in the housing 2 and engages the lever arm 69 of the reset button 64.
  • the unlocking device 63 also has a catch 70 with a catch body 71 which can be displaced against the force of a compression spring (not shown here) arranged in the reset button 64.
  • a support strip 72 is provided in the housing 2.
  • Two latching receptacles 73, 74 are formed in the support strip 72 at a distance from one another.
  • the latching body 71 engages in the latching receptacles 73, 74 depending on the position of the reset button 64.
  • the unlocking device 63 can also be designed without a catch 70 and the catch function. To carry out an unlocking process, the reset button 64 is then actuated and held manually.
  • FIG. 18 shows the lever pull 1 and the safety brake 31 in the standby mode, ie the locking disk 32 and the control disk 34 of the safety brake 31 are in their starting position, in which the locking disk 32 and the control disk 34 are congruent, ie the rear outer contour of the ratchet teeth 33 is aligned with the outer contour of the control disk 34.
  • the tactile contour 61 of the catch hook 36 is spring-loaded against the control disk 34. A load can be raised and lowered at any time without any problems.
  • the unlocking device 63 is in its neutral position.
  • the latching body 71 of the latch 70 is located in the first latching receptacle 73 further outward.
  • the blocking body 66 is located outside of it
  • the illustration in FIG. 19 shows the safety brake 31 in the locked state.
  • the safety brake 31 has triggered after a load was lowered too quickly or after the load chain was manually pulled too quickly in the load direction in the release mode.
  • the fang 57 of the catch hook 36 engages in the locking disk 32 (point S).
  • the locking disk 32 and the control disk 34 are interlocked with one another.
  • the catch hook 36 is prevented from falling out by the contour of the control disk 34 which is rotated by 45 ° (point N).
  • point N point N
  • the unlocking device 63 is actuated.
  • the reset button 64 is pressed for this purpose (arrow P4).
  • the reset button 64 is moved inwardly into the housing 2.
  • the blocking body 66 is brought into an unlocked position E by the reset button 64.
  • the latching body 71 of the latch 70 is moved with the reset button 64 and latches in the unlocked position E in the second inner latching receptacle 74.
  • the reset button 64 and with it the blocking body 66 are secured in the unlocked position E.
  • the safety brake 31 is then turned clockwise (arrow P5) using the handwheel until the locking disk 32 comes to rest on the blocking body 66 (point E).
  • the blocking body 66 and the locking disk 32 are in operative connection.
  • the blocking body 66 has a rounded abutment surface 75 on its outside.
  • the locking disk 32 is supported with an outer flank 76 of a locking tooth 33 on the abutment surface 75.
  • the locking disk 32 is prevented from further rotation in the clockwise direction by the blocking body 66.
  • the locking disk 32 is held by the blocking body 66 in such a way that the control disk 34 can be rotated relative to the locking disk 32 and brought into the starting position (see FIG. 21).
  • the safety brake 31 is rotated further 45 ° clockwise using the handwheel (arrow P6) until the locking disk 32 and the control disk 34 are congruent again, i.e. the starting position is reached. In this position the safety brake 31 engages noticeably.
  • the reset button 64 springs back (arrow P7). This is brought about by the action of the control disk 34 and the locking disk 32 against the rounded contour of the abutment surface 75.
  • stop bodies 50 are also moved in the elongated holes 49 of the rotational path limiter 47 (see also FIGS. 6 to 10).
  • stop bodies 50 designed as pins come to rest on the end of cam track 48 or elongated holes 49.
  • the torque applied via the handwheel is then transmitted via the control disk 34 and the locking disk 32 and the latching body 71 of the latch 70 is lifted out of the latching receptacle 74.
  • the tension spring 65 pivots the reset button 64 back into its starting or neutral position in the standby mode.
  • the safety brake 31 is ready for use again and is in its freely moving normal position.
  • a manual locking process of the safety brake 31 is explained with the aid of FIGS. 22 and 23.
  • the blocking body 66 has a tooth contour 77 with a tooth flank 78.
  • the reset button 64 is pressed (arrow P8) until it engages.
  • the latching body 71 of the latch 70 is located in the second latching receptacle 74. The position corresponds to Unlocked position. If a safety brake 31 is not equipped with a locking function, the reset button 64 is pressed and held manually.
  • the safety brake 31 is then rotated counterclockwise (arrow P9) via the flange wheel until the locking tooth 33 of the locking disk 32 rests on the tooth flank 78 of the blocking body 66 (point P in FIG. 22).
  • the safety brake 31 is then rotated further counterclockwise by 45 ° via the Fland wheel (arrow P10) until the locking disk 32 and the control disk 34 are completely interlaced.
  • the interlacing of locking disk 32 and control disk 34 can be seen in FIG.
  • the safety brake 31 engages noticeably in this position as well.
  • the reset button 64 automatically springs back. In the case of a safety brake 31 without a locking function, the reset button 64 is released.
  • the tension spring 65 pivots the reset button 64 back into its starting position according to the arrow P11. The safety brake 31 is now locked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Retarders (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

L'invention concerne un appareil de levage, en particulier un palan à levier (1). Ce dernier présente un carter (2) dans lequel une roue de chaîne de levage (17) et un arbre d'entraînement (20) entraînant la roue de chaîne de levage (17) par l'intermédiaire d'une transmission (18) sont montés rotatifs ainsi qu'un mécanisme d'entraînement (12), un frein actionné par la charge (16) et un frein parachute (30). Une chaîne de levage (10) peut être déplacée par l'intermédiaire d'une roue de chaîne de levage (17). Le frein parachute (30) induit un freinage d'urgence en cas de vitesse de rotation excessive de l'arbre d'entraînement (20). Le frein parachute (30) présente un disque de blocage (32) muni de dents de blocage (33) et un disque de commande (34) muni de cames de commande (35) ainsi qu'un crochet parachute (36). Le disque de blocage (32) et le disque de commande (34) peuvent tourner de manière limitée l'un par rapport à l'autre. La rotation est limitée par une limitation de parcours de rotation (47). Le crochet parachute (36) est monté pivotant et présente à une extrémité avant (55) un contour de cliquet (56) et à une extrémité arrière (60), un contour détecteur (61). Le contour détecteur (61) repose sur le disque de commande (34), sous l'effet de l'action d'un élément élastique (44). Lorsqu'une vitesse de rotation définie passe au-dessus d'un seuil, le contour détecteur (61) du crochet parachute (36) se soulève du disque de commande (34). Le contour de cliquet (56) se tourne en direction du disque de blocage (32) et vient s'engrener avec effet bloquant avec une dent de blocage (33) du disque de blocage (32). Après déclenchement du frein parachute, l'appareil de levage est verrouillé. Pour effectuer un déverrouillage, il est prévu un dispositif de déverrouillage (63) destiné à ramener le disque de blocage (32) et le disque de commande (34) dans leur position initiale.
EP20710033.0A 2019-07-24 2020-02-13 Appareil de levage Active EP4003897B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019120036.9A DE102019120036A1 (de) 2019-07-24 2019-07-24 Hebezeug
PCT/DE2020/100100 WO2021013285A1 (fr) 2019-07-24 2020-02-13 Appareil de levage

Publications (3)

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EP4003897A1 true EP4003897A1 (fr) 2022-06-01
EP4003897B1 EP4003897B1 (fr) 2023-06-28
EP4003897C0 EP4003897C0 (fr) 2023-06-28

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EP20708417.9A Active EP4003896B1 (fr) 2019-07-24 2020-02-13 Appareil de levage

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EP (2) EP4003897B1 (fr)
JP (2) JP7232378B2 (fr)
CN (2) CN114174210B (fr)
AT (2) AT17646U1 (fr)
CA (3) CA3164748A1 (fr)
DE (3) DE102019120036A1 (fr)
ES (2) ES2952011T3 (fr)
PL (2) PL4003897T3 (fr)
WO (2) WO2021013286A1 (fr)
ZA (2) ZA202200895B (fr)

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US11999600B2 (en) 2019-07-24 2024-06-04 Columbus Mckinnon Industrial Products Gmbh Lifting gear

Also Published As

Publication number Publication date
EP4003897B1 (fr) 2023-06-28
JP2022542856A (ja) 2022-10-07
JP2022542244A (ja) 2022-09-30
US12006190B2 (en) 2024-06-11
CA3146206A1 (fr) 2021-01-28
CN114174210A (zh) 2022-03-11
ES2952011T3 (es) 2023-10-26
CN114174210B (zh) 2023-06-23
ZA202200896B (en) 2023-06-28
CA3164748A1 (fr) 2021-01-28
EP4003897C0 (fr) 2023-06-28
AT17647U1 (de) 2022-10-15
JP7232378B2 (ja) 2023-03-02
ES2952196T3 (es) 2023-10-30
WO2021013286A1 (fr) 2021-01-28
CN114174211B (zh) 2023-07-18
JP7295331B2 (ja) 2023-06-20
DE202020106349U1 (de) 2020-11-23
DE102019120036A1 (de) 2021-01-28
EP4003896C0 (fr) 2023-06-28
EP4003896B1 (fr) 2023-06-28
US20220242704A1 (en) 2022-08-04
CN114174211A (zh) 2022-03-11
CA3153687A1 (fr) 2021-01-28
ZA202200895B (en) 2023-09-27
EP4003896A1 (fr) 2022-06-01
PL4003896T3 (pl) 2023-10-02
US20220274813A1 (en) 2022-09-01
WO2021013285A1 (fr) 2021-01-28
PL4003897T3 (pl) 2023-10-09
US11999600B2 (en) 2024-06-04
AT17646U1 (de) 2022-10-15
DE202020106350U1 (de) 2020-11-23

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