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Title:
WINCH AND ASSEMBLY OF SUCH A WINCH WITH A STORAGE DRUM AND/OR AN ENDLESS ROPE
Document Type and Number:
WIPO Patent Application WO/2008/133518
Kind Code:
A1
Abstract:
Winch suitable for a boat, in particular a sailing boat, the winch having winch drum (2) and a foot (9), the winch drum being rotateable relative to the foot in a first direction and being blocked for rotation in the opposite direction, the drum is manually driveable for rotation with a winch handle which is detachably connectable to the winch adjacent a free end of the winch drum, the foot of the winch being mounted on a base which base (11) is driveable for rotation relative to the boat in two directions by means of a motor. Also an assembly of such a winch with a rope storage drum is described.

Inventors:
OCKELS WUBBO JOHANNES (NL)
Application Number:
NL2008/050261
Publication Date:
November 06, 2008
Filing Date:
April 28, 2008
Export Citation:
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Assignee:
WUBBO OCKELS B V (NL)
OCKELS WUBBO JOHANNES (NL)
International Classes:
B66D1/74
Foreign References:
EP0479624A11992-04-08
US6712338B22004-03-30
FR2802909A12001-06-29
Attorney, Agent or Firm:
HATZMANN, M.J. (Johan de Wittlaan 7, JR Den Haag, NL)
Download PDF:
Claims:

Claims

1. Winch suitable for a boat, in particular a sailing boat, the winch having winch drum and a foot, the winch drum being rotateable relative to the foot in a first direction and being blocked for rotation in the opposite direction, the drum is manually driveable for rotation relative to the foot with a winch handle which is detachably connectable to the winch adjacent a free end of the winch drum, the foot of the winch being mounted on a base which base is driveable for rotation relative to the boat in two directions by means of a motor.

2. Winch according to claim 1, wherein, in a manual operation mode, the base is fixed for rotation relative to the boat.

3. Winch according to claim 1 or 2, wherein the winch motor is an electric motor.

4. Winch according to claim 1 or 2, wherein the winch motor is a hydraulic motor. 5. Assembly of a winch according to anyone of claims 1-4 and a rope storage drum.

6. Assembly of claim 5, wherein the rope storage drum is rotatably drivable by a storage drum motor.

7. Assembly of claim 6, wherein the storage drum motor is an electric motor.

8. Assembly of claim 6, wherein the storage drum motor is a hydraulic motor.

9. Assembly of claim 6, wherein the storage drum motor is a spring motor, which exerts a torque on the storage drum so that a rope part extending between the winch drum and the storage drum is always kept under slight tension.

10. Assembly of claim 5, wherein the storage drum is rotateably drivable by a electric or hydraulic storage drum motor, wherein between the electric or hydraulic storage drum motor on the one hand and the storage drum on the other hand a spring motor is mounted so that that a rope part extending between the winch drum and the storage drum is always kept under slight tension.

11. Assembly according to claim 9 or 10, wherein the spring motor is of the type marketed under the registered trademark Neg'ator®.

12. Assembly of a winch according to anyone of claims 1-4 and a rope, wherein the rope is closed in itself so that a rope part of the rope at a low tension side of the winch is connected with a rope part of the rope at a high tension side of the winch, wherein the assembly includes a tensioning device for providing a pre-tension in the rope part at the low tension side of the winch. 13. Assembly according to claim 12, wherein the tensioning device includes a turning pulley which is connected to the mast or the hull of a ship via a tensioning spring.

14. Assembly according to claim 12 or 13, wherein the rope part at the high tension side of the winch is connected to a load, e.g. a sail to be adjusted with the rope.

15. Assembly according to claim 13, wherein the tensioning device is a storage drum as described in anyone of claims 5-11.

Description:

Title: Winch and assembly of such a winch with a storage drum and/or an endless rope

Technical Field

The invention relates to a winch suitable for a boat, in particular a sailing boat. The invention also relates to an assembly of such a winch with a storage drum.

Background

Winches for sailing boats are e.g. marketed by Lewmar® and Harken®. An example of a winch is described in EP-A-O 106 422 or EP-A-O 887 302. The known winches normally have a winch drum and a foot which are coaxially arranged around a main shaft. The main shaft can be driven by a winch handle which is detachably connectable to the main shaft adjacent a free end of the winch drum. When the main shaft is rotated also the drum rotates. Normally, gearing is present between the main shaft and the drum. The foot is fixedly mounted on e.g. the deck or the mast of a boat. Normally, the drum can rotate relative to the foot in a first direction and is blocked for rotation in the opposite direction. When the main shaft is driven with the winch handle, the drum also rotates. With the known winch, a rope connected to e.g. a sail can be winched in. On the tail end of the rope, i.e. the free end of the rope a small force has to be exerted. This force can be exerted by a crew member or by a self-tailing provision on the winch. This relatively small force is amplified by the rotating winch drum, dependent on the number of loops with which the rope is winded around the winch drum. A relatively small pretension in the tail end of the rope together with the rotation of the winch drum leads to a relatively high rope tension in the tension side of the winch. When

the rope has to be veered out, a crew member lets the rope slip around the drum.

Both Lewmar® and Harken® also market motor driven winches. With these winches the main shaft is driven by an electric or hydraulic motor. Consequently, when the rope has to be veered, again a crew member has to let the rope slip around the drum.

The object of the invention is to provide a winch which can be fully automatically operated, i.e. both for winching in and veering out a rope, which provides a full manual backup and which, from an esthetical point of view, is as attractive as the known winches.

Summary of the invention

The invention provides winch suitable for a boat, in particular a sailing boat. The winch has a winch drum and a foot. The winch drum is rotateable relative to the foot in a first direction and blocked for rotation in the opposite direction. The drum is manually driveable for rotation relative to the foot with a winch handle which is detachably connectable to the winch adjacent a free end of the winch drum. The foot of the winch is mounted on a base which base is driveable for rotation relative to the boat in two directions by means of a motor.

It should be noted that the foot and the base may be one integral part. Because the foot of the winch is mounted on a base which can be rotated by a motor in to opposite directions relative to the boat, i.e. relative to the deck or the mast of the boat, both automatically winching in as automatically veering out of a rope is possible by driving the motor in a first direction or in the opposite direction. In other words, a fully automated winch for both winching in and veering out is provided.

When no energy is present for driving the motor, or when the motor is broken, the base and thus the foot will be fixed, or at least can be fixed relative to the boat. Under those circumstances the winch will act as a

standard manually operable winch. In other words, a full manual backup is provided.

The rotateable base can be integrated into the deck of the ship so that a top side thereof is flush with the top side of the deck. Consequently, the appearance of the winch can be as attractive as the appearance of a standard winch.

Additionally, the additional costs of the solution for obtaining this additional functionality relative to the known electrically or hydraulically driven winches with the limited functionality are minimal. The motor for driving the rotation of the base, i.e. the winch motor can be an electric motor or a hydraulic motor.

The invention provides an assembly of a winch according to the invention and a rope storage drum. The rope storage drum is rotatably drivable by a storage drum motor. The rope storage drum serves for storing the tail of the rope. The storage drum can be positioned below the deck of the boat.

The storage drum motor can be an electric or a hydraulic motor.

In another elaboration the storage drum motor can be a spring motor, which exerts a torque on the storage drum so that a rope part extending between the winch drum and the storage drum is always kept under slight tension.

Such a variant has the advantage that no electrical or hydraulic energy is consumed for driving the storage drum.

In still another elaboration of the invention, the storage drum is rotateably drivable by a electric or hydraulic storage drum motor, wherein between the electric or hydraulic storage drum motor on the one hand and the storage drum on the other hand a spring motor is mounted so that that a rope part extending between the winch drum and the storage drum is always kept under slight tension.

Such a variant has the advantage that a big length of rope can be stored on the storage drum while also the tension in the tail end of the rope is determined by the spring motor. Consequently, the tension can be kept rather constant. The spring motor can be of the type marketed under the registered trademark Neg'ator and shown in US-3,251,627 for retracting a seat belt.

The invention also provides an assembly of a winch according to the invention and a rope, wherein the rope is closed in itself so that a rope part of the rope at a low tension side of the winch is connected with a rope part of the rope at a high tension side of the winch, wherein the assembly includes a tensioning device for providing a pre-tension in the rope part at the low tension side of the winch. The tensioning device can e.g. be a turning pulley which is connected to the mast or the hull of a ship via a tensioning spring. The tensioning spring can be a helical spring or a pneumatic spring. An embodiment comprising the combination of the assembly of a winch with an endless rope and as tensioning device a storage drum driven by a hydraulic, electric and/or spring motor is also feasible.

Other features and aspects of this disclosure will be apparent from the following description and the accompanying drawings.

Brief Description of the Drawings

Fig. 1 shows a schematic vertical cross section through the winch and the drum;

Fig. 2 shows a schematic perspective view of an assembly of a winch with a storage drum; and

Fig. 3 shows a schematic perspective view of an assembly of a winch and an endless rope.

Detailed Description

Fig. 1 shows a winch 1 of the self -tailing type. Also a standard winch may be used. The winch 1 is provided with a drum 2 and a self-tailing channel

3 that rotates with the drum. The drum is mounted for rotation by means of bearings 4 on a cylindrical casing 5 which is fixedly connected to a foot 9. There is a main shaft 6 inside the casing 5 which may driven by a winch handle from its top end 6a (the winch handle and a corresponding socket in the main shaft 6 are not shown) to transmit rotation to gear trains 7, 8 which are rotatably connected to the foot 9 of the winch and which drive the drum 2 through internal gear rack 10. The arrangement and nature of the gearing between the main shaft 6 and the drum 2 forms no part of the present invention and the invention is applicable to winches of which the drum 2 is driven by the main shaft 6 directly, through a single gear train, or through a plurality of gear trains.

The winch of the embodiment shown in Fig. 1 is mounted on a base 11. From a top view, the base is circular. The foot 9 of the winch is fixedly connected to the base 11. It should be noted that base 11 and foot 9 also may be one integral part. The base 11 is driveable for rotation about the axis L which is coaxial with the axis of the main shaft 6. To that end a motor 12 is provided which is connected with the boat, in this example with the deck 13 of the boat. A winch motor shaft 20 is provided with a crown gear wheel 21. A base shaft 23, which is connected to the base 11 is also provided with a crown gear 22 which co-operates with the crown gear wheel 21. It is clear that also other drive connections between the motor 12 and the base 11 are feasible.

The winch motor 12 can rotate the base 11 in two opposite directions. Consequently, the rope 14 can be winched in and veered out by the motor 12. The winch motor can be an electric or a hydraulic motor. When the motor is broke, or no power is available, the base 11 will not rotate and the winch 1 can be operated manually with the winch handle as a standard manually operated winch.

It is clear that the winch 1 can also be connected to another part of the boat, e.g. a mast.

Fig. 1 also shows a rope storage drum 15. The rope storage drum 15 can be positioned on the deck 13 or below the deck 13 or on any suitable place on or in the boat. The tail 14a of the rope 14 is only partly shown and is guided to the rope storage drum 15 via well-known rope guide means. The rope storage drum 15 is in the present example driven by a spring motor 16. Such a spring motor 16 is e.g. marketed under the trademark Neg'ator®. The constant spring motor 16 shown has a leaf spring 17 which is wound around and connected to a first shaft 18 which is driveably connected to the shaft of the storage drum 15. Another end of the leaf spring 17 can be wound around a second shaft 19 when the storage drum 15 is rotated. When the spring is a partly unwounded from the first shaft 18 to the second shaft 19 a slight constant torque is exerted on the first shaft 18 tending to rotate the storage drum 15 so as to wind up the tail end 14a of the rope 14 on the rope storage drum 15. In stead of a spring motor 16 also an electric motor or a hydraulic motor can be used to drive the rope storage drum 15. Also a combination of a spring motor 16 with a electric or hydraulic motor is possible.

The embodiment provides a fully automated winching in and veering out of a rope. Further, when no power is available or the winch motor is broke, a fully functional manual backup is available. Further, the costs of the system are very reasonable. Finally, the aesthetic appearance of the winch is as beautiful as a standard winch.

Fig. 2 shows a schematic perspective view of an assembly as shown in Fig. 1. In this embodiment, the drum 2 has no self-tailing channel. In fact, a self-tailing channel is not necessary when a rope storage drum 15 provides the tensioning force on the tail end 14a of the rope 14 as is the case in the embodiment of Fig. 2. In the embodiment of Fig. 2, the rope storage drum 15 is driven by spring motor 16. The embodiment of Fig. 2 shows a flange 30 that connects the winch with the deck 13 or the mast of a ship. A ring motor 112 is provided. The ring motor 112 may drive a base 11 of the winch in two opposite

directions. Base 11 (not visible) may be inside ring motor 112. As in the embodiment of Fig. 1, the foot 9 (not visible) of the which is fixedly connected to the base 11 or may form an integral part therewith. By virtue of this construction, winch drum 2 may be driven in two opposite directions by motor 112.

In the rope part 14a between the winch drum 2 and the rope storage drum 15 a relative low tension is present. The rope part 14b leading to a load, e.g a sail 24 to be adjusted, a relatively high tension is present. The amplification of the tension in the rope is dependent on the number of loops with which the rope 14 is wound around the winch drum 2.

Fig. 3 shows a schematic perspective view of an assembly of a winch including a winch drum 2 and a rope 25. Again, the winch drum 2 does not have a self-tailing channel although the drum may have such a channel. Also in this embodiment a flange 30 is provided that connects the winch with the deck 13 or the mast of a ship. A ring motor 112 is provided that may drive a base 11 in two opposite directions. Base 11 (not visible) may be inside ring motor 12. As in the embodiment of Fig. 1, the foot 9 (not visible) of the winch is fixedly connected to the base 11 or may form an integral part thereof. By virtue of this construction, winch drum 2 may be driven in two opposite directions by motor 112.

The rope 25 is closed in itself, i.e. endless, so that a rope part 25a of the rope 25 at a low tension side of the winch drum 2 is connected with a rope part 25b of the rope 25 at a high tension side of the winch drum 2. The assembly includes a tensioning device 26 for providing a pre-tension in the rope part 25a at the low tension side of the winch drum 2. In the embodiment shown, the tensioning device 26 includes a turning pulley 27 which is connected to the mast or the hull of a ship via a tensioning spring 28. The tension spring 28 can be any type of spring, e.g. a helical spring, a pneumatic spring or a spring motor of the Neg'ator® type. In addition to the tension spring 28, a manual tensioner 31 may be provided between the turning pulley

27 and the connection point 33 to the mast or the hull of the ship. With such a manual tensioner 31 the tension spring 28 may be pre-tensioned. The tensioning device 26 may also be a storage drum of the type described above with a motor, such as a hydraulic, a electric or a spring motor. The rope part 25b at the high tension side of the winch drum 2 is connected to a load, e.g. a sail 29 to be adjusted with the rope 24. To that end, rope part 25b may be negotiated around several guides such as pulleys 32. Because the winch drum 2 can be driven in two opposite directions, the assembly with the endless rope 25 is feasible. Although the preferred embodiments of this invention have been described herein, improvements and modifications may be incorporated without departing from the scope of the following claims.