FR2719033A1 - Rotary stabiliser for lifting hooks e.g. used in helicopter winches etc - Google Patents

Abstract

The stabilising device is designed to prevent the hook from rotating when it is lifting loads. The lifting device consists of a drum, which can be driven in rotation in either direction. On the drum is rolled the lifting cable (1), with the free end linked to the shaft (10) of the hook (14), from which the load is suspended. Between the free end of the cable and the shaft of the hook is interposed a bracket (3), which contains the stabilising device.The hook is mounted so as to be able to rotate within the bracket, however, the device (7, 8 & 9) are provided to control the rotation of the hook. The bracket is mounted on the end of the cable by means of a bearing (2) and it carries a bearing housing (12) at the lower end to house the bearing (11), which carries the hook. The shaft of the hook is fixed to a pinion (9), which is meshed with a smaller drive pinion (8), which is driven by an electric motor (7) to produce the stabilising rotation.

Description

Stabilizing device for a suspension hook

  of a load of a lifting device.

  The present invention relates to a device

  stabilizer of a hook for hanging a cargo

age of a lifting device.

  The invention relates to lifting devices such as helicopter winches, overhead cranes,

cranes, etc.

  In such devices, provision is generally made

  ment a motor which drives, in one direction or the other, a drum which receives a cable whose free end is

connected to the pole of a hook.

  It has been found that very often the additional charge

  carried by the hook turned on itself, either due to the wind, the winding of the cable strands, in the

  helicopters due to the breath emitted by the blades of the ro-

  tor, etc ... This rotation of the load often turns out

  dangerous, in particular, for rescues.

  One of the aims of the present invention is to

remedy such a drawback.

  The stabilizing device according to the invention targets lifting devices such as a helicopter winch,

  traveling crane, crane comprising a drum driven in rotation

  one way or the other and on which is rolled up

  a cable whose free end is connected to the shaft of a hook intended for the suspension of the load, said

  device being characterized in that it comprises a sup-

  port inserted between the free end of the cable and the hook and on which said hook freely rotates, means

  being provided for controlling the rotation of the hook.

  So we can thwart the rotation of the

  load by hooking a rotation in opposite direction

  dried until said charge is stabilized.

  According to a constructive characteristic, the device comprises a housing provided with means for its

  fixing at the free end of the cable and having a lo-

  gement in which is inserted a guide bearing of the hook shank, said shank being integral with a pinion

  cooperating with means for its selective training-

one way or the other.

  According to another construction characteristic,

  ve, the box contains an electric motor on the shaft

  outlet from which a pinion cooperating with the pin is wedged

  rod stem, the cable having, in its core, conductors for the power supply of the engine, and inserted on

a supply circuit.

  According to a particular embodiment, the device comprises a control unit inserted on the motor supply circuit with the interposition of a rheostatic system. So you can control the motor

  with a fast or slow speed depending on the rotation

  tion of the load in order to easily stabilize it.

  To facilitate holding the hook in a determined angular position, the control unit includes a system for recalling the angular position of the hook. Finally, according to an alternative embodiment of the invention, the housing includes a housing for receiving

  a motor supply battery and a radio receiver

  electric control of said motor, the control being cons-

  held by a portable radio transmitter.

  The invention will now be described in more detail with reference to an embodiment.

  particular given by way of example only and representing

  tee to the accompanying drawings, in which: S Figure 1 is a sectional view of a device,

according to the invention.

  Figure 2 is a plan view showing the box

third order.

  Figure 3 shows in section a variant of

reading of the invention.

  The reference 1 designates a cable of a lifting system, for example, of a helicopter winch, a

overhead crane or other.

  The cable has, in its core, two conduc-

  electrical sensors 4 suitably insulated in a sheath 5.

  On the end of the cable 1 is fixed, by

flanges 2, a housing 3.

  Preferably this housing is waterproof and contains, internally, an electric motor 6 fixed by a flange 7 and on which the conductors are connected 4. On the output shaft of the electric motor 6 is wedged a pinion 8 which meshes with a pinion 9 fixed on an axis 10 guided in a bearing 11 inserted in a housing

12 of housing 3.

  The axis 10 constitutes the shaft of a hook 14

  extending outside the housing and having a ver-

security wheel 15.

  In the helicopter cabin o in the cab

  crane operator, there is a control unit 17

  which is inserted on the motor supply circuit 6.

  This control unit has two buttons 18 and 19 cor-

  corresponding, the first to the rise of cable 1 and the second

  at the descent of it. On the housing 17, it is pre-

  seen a lever 20 which can, from a new position

  tre 21, turn either in one direction or in the other and which closes the power supply circuit of the motor 7 through a rheostat. By turning the lever 20 in the direction of the arrow f, it is thus possible to power the motor 7 so that the pinion 8 drives the pinion 9 in the direction of the directions.

  watch first, at a slow speed to not

  ser, when said lever reaches the end of travel, against

  a stop 20, gradually, at a rapid speed.

  By turning the handle 20 in the direction of the arrow g, the motor 7 is supplied so that the pinion 9 is driven in the direction opposite to the direction of clockwise and, gradually, rapidly until the

stop 22.

  In order to facilitate the location in space S of the angular position of the hook 14, on the housing 17, a wind rose is provided with an index 24 movable on an axis 25, said index 24 being connected to the hook 14 so the operator can act on lever 20

  in order to keep the hook 14 in the angular position

re suitable.

  In Figure 3, a variant is shown

of the remote-controlled invention.

  In this figure we have reported the references

  previously used to designate the corresponding bodies

  heavy, but assigned the letter "a".

  The housing 3a, at its upper end, is

  integral with a hook 27 allowing its attachment to an ex-

  end of a cable. The hook has a safety lock

rity 28.

  In the housing are provided a first compar-

  tent 30 intended to receive a battery 31 for the power supply

  tation of the motor 6a and a second compartment 33 in the-

  which is housed a radio receiver 34 of a tele-

  control provided with an antenna 35 projecting from the surface of the housing 3a which also includes a switch 36

  to open or close the receiver circuit 34.

  The receiver 34 can be controlled by a sim-

  ple portable radio transmitter with two channels, one of which corresponds to the rotation in one direction of the motor 6a and the other to the rotation in the other direction of said motor 6a.

  An embodiment has also been represented.

  tion in which a single cable is provided but the provision

  sitive, according to the invention, is perfectly adaptable in the case of a system providing two coiling cables and

  taking place from two drums driven simultaneously

  by the same motor and the free ends of which are connected by a supporting rod, in

  a mid-length midpoint, a hook.

  Of course, the invention is not limited

  to the embodiment which has just been described and represented

  smelled. We can make many modifications

  detail without departing from the scope of the invention.

Claims (6)

  1. Stabilizing device for a load suspension hook for lifting devices such as   helicopter winch, overhead crane, crane including a drum   bour rotated in one direction or the other and on which is wound a cable (1) whose free end is connected to the shaft (10) of a hook (14) intended for the suspension of the load, characterized in that it comprises a support (3) inserted between the free end of the cable (1) and the hook (14) and on which said freely rotates   hook (14), means (7, 8, 9) being provided for request the rotation of the hook (14).   2. Stabilizing device for a hook for hanging a load for lifting devices, according to claim 1, characterized in that it comprises a   housing (3) provided with means (2) for fixing it to the ex-   free end of the cable (1) and having a housing (12)   in which is inserted a bearing (11) for guiding the ham-   pe (10) of the hook (14), said pole (10) being integral   a pinion (9) cooperating with means (8) for its   selectively dragging one way or the other.   3. Stabilizing device for a load suspension hook for lifting devices, according to   claims 1 and 2, characterized in that the box   tier (3) contains an electric motor on the output shaft   tie of which is wedged a pinion cooperating with the pinion   the pole (10), the cable having in its core conduits-   tors (4) for the motor supply and inserted on a power circuit.   4. Stabilizing device for a load suspension hook for lifting devices, according to   claims 1, 2 and 3, characterized in that it comprises   carries a control unit (17) inserted on the circuit   motor supply (7) with interposition of a system rheostatic teme.   5. Stabilizing device for a load suspension hook for lifting devices, according to   claims 1, 2, 3 and 4, characterized in that the   control box includes a system for recalling the angular position of the hook. 6. Stabilizing device for a load suspension hook for lifting devices, according to   claims 1 and 2, characterized in that the box   tier (3a) has a housing (30) for receiving a bat-   motor supply terminal (6a) and a radio receiver   electric control of said motor, the control being cons-   held by a portable radio transmitter.