NL1024079C1 - Retaining device for a cable. - Google Patents

Retaining device for a cable. Download PDF

Info

Publication number
NL1024079C1
NL1024079C1 NL1024079A NL1024079A NL1024079C1 NL 1024079 C1 NL1024079 C1 NL 1024079C1 NL 1024079 A NL1024079 A NL 1024079A NL 1024079 A NL1024079 A NL 1024079A NL 1024079 C1 NL1024079 C1 NL 1024079C1
Authority
NL
Netherlands
Prior art keywords
drum
cable
lateral surface
preceding
holding device
Prior art date
Application number
NL1024079A
Other languages
Dutch (nl)
Inventor
Markus Van Der Laan
Original Assignee
Novatug B V
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 Novatug B V filed Critical Novatug B V
Priority to NL1024079 priority Critical
Priority to NL1024079A priority patent/NL1024079C1/en
Application granted granted Critical
Publication of NL1024079C1 publication Critical patent/NL1024079C1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • B66D1/30Rope, cable, or chain drums or barrels

Description

Retention device for a cable.

The present invention relates to a holding device for a cable, comprising a drum for containing at least two windings of the cable on the lateral surface thereof, which drum is mounted for rotation. Such a retaining device is generally known in the prior art. With the aid of a rotating drum, a cable can be tightened or released again. Such drums are used in particular in shipping such as on tugboats or other vessels.

10 When the cable is under tension and the cable is released, large "squeezing forces" occur in the cable wrapped around the drum with respect to the underlying cable, which limit the strength and service life of the cable.

In view of the larger diameter of the drum (and therefore large arm of outgoing cable), large forces are required to hold the cable under full load as well as to pull the cable. This means that the brake / blocking system (and to a lesser extent the drive motor) for the drum must be correspondingly heavy in order to be able to handle a large force on the cable, which translates via the diameter of the drum, into a large torque. bring. The diameter of the drum is determined by the diameter of the cable. Cables can only be subjected to a limited bend. If the bending is too great, there will be a considerable loss of strength as well as damage to the cables in the long run.

It is the object of the present invention to provide a cable holding device with which it is possible to apply a large holding force, i.e. a large torque, to the drum with a relatively small brake / blocking system and a simple drum. On the other hand, it must be ensured that sufficient displacement of the cable can be achieved with the drum.

This object is achieved with the retaining device described above in that the distance from the lateral surface of said drum to the axis of rotation of said bearing varies along the circumference of said drum.

According to the present invention, the center of the drum no longer coincides with the center of rotation of the drive thereof. As a result, the lateral surface of the drum on which the cable is to lie will alternately be closer to and further away from the center of rotation. The moment the center of rotation is closest to the lateral surface, the highest holding force can be exerted on the cable. At the moment that the lateral surface is farthest from the axis of rotation, this force is smallest. Due to the eccentric arrangement, it can be realized on the one hand that, by suitable choice of the engagement location of the cable, optimum holding force is provided and on the other hand, it is guaranteed that a sufficient winding / unwinding speed is present. In this way a relatively small brake / blocking system (which can include the drive motor) is sufficient. The limitation of the size of the brake / blocking system is essentially dependent on the reduction of the distance from the center of rotation to the lateral surface.

In a special embodiment, it appears that the capacity of the brake / blocking system 10 can be reduced by more than a factor of ten. This makes it possible to start from a completely modified, highly simplified construction.

If the distance from the lateral surface to the center of rotation of the drum is particularly small, there will be little or no moment of tension. The release of the cable must then be achieved by positively driving the drum by rotating a motor with I. Moreover, this also increases the distance after which movement I is automatically continued. However, the positive drive can also be realized by means of a mechanism or lever.

In all cases, the drum will be able to achieve considerable rotational speeds when unloading. Being eccentric in principle causes imbalance. According to the present invention, this imbalance is removed by providing balancing, for example by applying additional weights. Moreover, by applying these weights to the outer circumference as much as possible, the H moment of inertia is increased

An important advantage of this rotating embodiment is that during unloading the cable moves under great load together with the supporting surface (no slip) and does not cause any wear on both surfaces.

According to an advantageous embodiment of the invention, at least one location of the circumference of the lateral surface substantially coincides with the center of rotation of said bearing. By essentially it is to be understood that some distance may exist because of the diameter of the drive shaft.

According to an advantageous embodiment of the invention, preferably when used on tugboats with towing installations that can be rotated through 360 degrees in the horizontal plane, the axis of rotation will preferably be substantially vertical. This makes it possible, in contrast to conventional winches with horizontal axes of rotation, to realize a low installation height, while the cable nevertheless undergoes a slight bending (large drum diameter).

According to a further advantageous embodiment, the lateral surface is cylindrical and more particularly circular cylindrical. To increase the holding force of the cable, grooves are provided (on a part) of the lateral surface for receiving the cable. When using such grooves, the holding force can be increased to a higher percentage of the tensile strength of the cable. Up to 95% of the breaking strength of the non-bent cable has been found by choosing an optimum diameter of the drum.

According to a further advantageous embodiment, the surface of the lateral surface is made rougher or provided with other materials with a greater coefficient of friction to increase the friction between the lateral surface and the cable. As a result, more force is transmitted per winding and fewer windings on the drum will suffice.

According to a further advantageous embodiment, the drum consists of an eccentric part and a centric part, wherein a guide system can guide the cable from one part to the other. Hereby it is possible to guide the cable on the centric part when it is brought in and out and only to guide the cable around the eccentric part in the case of holding it. The separation between these parts can be carried out by a bulkhead provided with an opening of 10 - 25% of the circumference.

According to a further advantageous embodiment, the drum is not only designed as a holding device for the cable, but also as storage. In this case, the part for storing the cable will usually be placed centrally with respect to the axis of rotation. In general, a separate part of the drum that is above or below the holding device will be used for this.

The invention also relates to a winch system in which the storage of the cable is separate from the retaining device. This storage is at a distance 30 and can take place in a variety of ways, including storage on a single drum, storage around a system of several drums, stored in a storage system, etc.

The invention will be explained in more detail below with reference to an exemplary embodiment shown in the drawing. It shows: 1 02407 3 I 4

FIG. 1 shows schematically the retaining device according to the invention in combination with I

I a separate cable storage; and I

FIG. 2 is a bottom view of the holding device according to the invention; and I

FIG. 3 schematically the retaining device according to another variant of the invention in combination with a separate cable storage.

In Fig. 1, 1 denotes the holding device according to the invention. This I consists of a drum 2 which is driven by a motor 10 and I brake / blocking system 20 and 21. The bearing of the structure is indicated by 9, but it will be understood that any other bearing can be used. Drum 2 is circularly cylindrical with a center line 11. On top of drum 2 the circular cylindrical storage drum 14 is attached with a center line 12. In the illustrated embodiment, the center of the storage drum 14 coincides with center line 12.

However, it is also possible to place it eccentrically, such as drum 2.

The axis of rotation of the drive shaft 8 of motor 10 is indicated by 12. From fig.

1 and 2 it appears that the axis of rotation 11 and 12 are displaced relative to each other. The drum 2 is provided on the lateral surface 13 with circumferential grooves 3 for receiving

I of two windings of cable 4. I

Reference numeral 5 designates a cable guide which can be moved up and down in the direction of arrow 6 in order to guide the cable properly into the groove or to guide the cable from the drum 2 to the storage drum 14 and I vice versa. From the lower part of drum 2, an edge 20 depends on which a brake block 21 can engage in a very schematic manner.

In Fig. 2 the drum is shown in the position in which the greatest pulling force I can be supplied. It appears that the center line 12 substantially coincides with the lateral surface 13, so that on cable 4 the maximum tension, resp.

I release force can be applied.

Fig. 3 shows another variant of the invention with a separate storage drum 7. The cable 4 first runs around the circular cylindrical drum 2 with axis 11, then a number of layers around the circular cylindrical part with axis 12 and then on to the individual storage drum 7. In the illustrated embodiment, the center of the upper drum coincides with center line 12.

However, it is also possible for this part to coincide with center line 11, the cable I then runs a number of windings around an eccentric drum and then runs through to the individual storage drum 7. Moreover, it is possible move motor 10 for driving storage drum 7. Drum 2 is driven by driving storage drum 7.

When reading the above, clear variants S will occur to those skilled in the art, in particular these depend on the use of the holding device. Such variants are within the scope of the appended claims.

024079

Claims (11)

  1. Clamping device (1) for a cable (4), comprising a drum (2) for containing at least two windings of the cable on its lateral surface (13), which drum is rotatably mounted with the drum characterized in that the distance from the lateral surface of said drum to the axis of rotation I (12) of said bearing varies along the circumference of said drum
  2. 2. Retaining device according to claim 1, wherein at least one location of the circumference of the lateral surface substantially coincides with the center of rotation of said bearing.
  3. 3. Holding device according to one of the preceding claims, wherein said lateral surface is circular cylindrical. I 15
  4. Holding device according to one of the preceding claims, wherein the drum is driven by a motor (10).
  5. 5. Holding device according to one of the preceding claims, wherein cable receiving grooves (3) are arranged in said lateral surface.
  6. 6. Holding device according to one of the preceding claims, wherein the surface of the lateral surface is provided with means for obtaining more friction between the lateral surface and the cable. I 25
  7. 7. Holding device as claimed in any of the foregoing claims, wherein said drum is designed for receiving a supply of cable. i
  8. 8. Retaining device followers according to one of the preceding claims, comprising braking means. I 1024079
  9. A winch system comprising a wrapping / wrapping drum (7) comprising a supply cable and a retaining device (1) according to one of the preceding claims.
  10. Tugboat comprising a winch device with holding device as claimed in any of the claims 1-8, wherein the cable delivery point / receiving point can be adjusted 360 ° in a substantially horizontal plane with respect to that boat.
  11. 11. Tugboat according to claim 10, wherein the center line of said drum is substantially vertical in the unloaded state. 1024079
NL1024079A 2003-08-11 2003-08-11 Retaining device for a cable. NL1024079C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL1024079 2003-08-11
NL1024079A NL1024079C1 (en) 2003-08-11 2003-08-11 Retaining device for a cable.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
NL1024079A NL1024079C1 (en) 2003-08-11 2003-08-11 Retaining device for a cable.
BRPI0413510 BRPI0413510A (en) 2003-08-11 2004-08-10 winch system comprising a cable retaining device and tug
US10/567,458 US20060226278A1 (en) 2003-08-11 2004-08-10 Retraining device for a cable
PCT/NL2004/000561 WO2005019088A1 (en) 2003-08-11 2004-08-10 Retaining device for a cable
AU2004266984A AU2004266984A1 (en) 2003-08-11 2004-08-10 Retaining device for a cable
EP20040774868 EP1654186A1 (en) 2003-08-11 2004-08-10 Retaining device for a cable

Publications (1)

Publication Number Publication Date
NL1024079C1 true NL1024079C1 (en) 2005-02-14

Family

ID=34214840

Family Applications (1)

Application Number Title Priority Date Filing Date
NL1024079A NL1024079C1 (en) 2003-08-11 2003-08-11 Retaining device for a cable.

Country Status (6)

Country Link
US (1) US20060226278A1 (en)
EP (1) EP1654186A1 (en)
AU (1) AU2004266984A1 (en)
BR (1) BRPI0413510A (en)
NL (1) NL1024079C1 (en)
WO (1) WO2005019088A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7909308B2 (en) * 2007-04-19 2011-03-22 Sikorsky Aircraft Corporation Winch system for VTOL aircraft
NL2011226C2 (en) * 2013-07-26 2015-01-27 Novatug Holding B V Retaining device for a cable, winch control arrangement comprising such a retaining device and method for operating such a winch control arrangement.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1621714A (en) * 1926-02-12 1927-03-22 Joseph G Dyer Bull-wheel attachment
NO434273L (en) * 1973-11-13 1975-06-09 Hydraulik Brattvaag As
DE3149589A1 (en) * 1981-12-15 1983-06-23 Stetter Gmbh Rope drum for a rope winch of a hoisting machine
GB2296229A (en) * 1994-12-20 1996-06-26 Alform Extrusions Ltd Winding drum
NL1012977C1 (en) * 1999-09-03 2001-03-06 Imc Group B V Design for tug.
AU2003243424A1 (en) * 2002-06-06 2003-12-22 Gilman A. Hill Deep-well, continuous-coiled-tubing apparatus and method of use
US7364136B2 (en) * 2005-07-15 2008-04-29 Tiffin Scenic Studios, Inc. Hoist assembly

Also Published As

Publication number Publication date
AU2004266984A1 (en) 2005-03-03
US20060226278A1 (en) 2006-10-12
EP1654186A1 (en) 2006-05-10
BRPI0413510A (en) 2006-10-10
WO2005019088A1 (en) 2005-03-03

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Legal Events

Date Code Title Description
VD2 Lapsed due to expiration of the term of protection

Effective date: 20090811