Portable pill winch

Abstract

Portable capstan winch (1) with a capstan drum (2), a motor (3) for driving the capstan drum (2), and a self-tensioning device (4) which is designed to automatically tension a rope section (5) extending from the capstan drum (2).

Description

[0001] The invention relates to a portable capstan winch with a capstan drum and a motor for driving the capstan drum.

[0002] Such devices are used, for example, for lifting or pulling trees and tree trunks or steel cables in forestry or for pulling game during hunting. Portable capstan winches are attached to a fixed point, such as a tree, which can absorb the pulling force of the capstan winch. The object to be pulled is attached to a rope, which is wound over the motor-driven capstan drum and, after a few wraps around the capstan drum, is unwound again. In this way, the capstan drum can transfer a pulling force to the rope to which the object to be pulled is attached. Portable capstan winches are known from the prior art, but they require an operator to manually pre-tension an outgoing section of rope. This manual operation can, depending on the work environment, pose a hazard to the operator due to, for example, falling objects or broken ropes.

[0003] The object of the invention is to improve portable capstan winches.

[0004] To achieve the stated object, the features of claim 1 are provided according to the invention. In particular, it is thus proposed that the portable capstan winch have a self-tensioning device designed to automatically tension a rope section extending from the capstan drum. The self-tensioning device enables a rope to be automatically unwound from the capstan drum without an operator having to hold it by an outgoing rope section and thus pre-tension it. Pre-tensioning the outgoing rope is necessary to enable reliable power transmission from the capstan drum to the rope wound around the capstan drum.

[0005] In one embodiment of the portable capstan winch, the self-tensioning device comprises an upper pulley and a lower pulley. A self-tensioning groove can be formed between the upper pulley and the lower pulley to accommodate the rope section extending from the capstan drum. When the capstan winch is in use, the outgoing rope section can be inserted into the self-tensioning groove and clamped between the upper pulley and lower pulley. When the capstan drum is rotated, the rope section extending from the capstan drum can then be tensioned.

[0006] The upper and lower pulleys can be pre-tensioned by spring force to clamp a cable section inserted into the self-tensioning groove. This allows the outgoing cable section to be clamped between the upper and lower pulleys using spring force. Especially when the upper and lower pulleys are conical, meaning the clamping gap between them tapers towards the base of the gap, the cable section can be easily and quickly released from the clamp. This is achieved by pulling on the cable in the appropriate direction.

[0007] To generate the aforementioned spring force, compression springs can be arranged between the upper and lower pulleys. These compression springs can exert a compressive force on the clamped cable section via the upper and lower pulleys, clamping it in the self-tightening groove. It is particularly advantageous to select the compression springs with a spring force that ensures the outgoing cable section is securely clamped in the self-tightening groove while still allowing the cable section to be easily released from the self-tightening groove.

[0008] The self-tensioning device can be arranged at a free end of the capstan drum. This allows for a space-saving and compact design of the capstan winch. Alternatively or additionally, the self-tensioning device can be connected to the capstan drum in a rotationally fixed manner. Thus, when the capstan drum rotates, the self-tensioning device rotates at the same angular velocity as the capstan drum. The self-tensioning device can have a larger diameter than the capstan drum, in particular as a drum section of the capstan drum adjacent to the self-tensioning device. The resulting diameter difference results in the outgoing rope section, which is guided in the self-tensioning device, moving at a higher track speed than the rope on the capstan drum.This keeps the outgoing rope section under tension and thus the rope section wound on the capstan drum is applied to the capstan drum under force, which ultimately promotes a reliable transmission of force from the capstan drum to the rope.

[0009] The portable capstan winch can be manually transportable. For this purpose, the capstan drum can be equipped with a carrying handle. This allows the operator to easily carry the capstan winch manually to the desired location.

[0010] The portable capstan winch may be equipped with a load-holding element. The load-holding element serves to prevent the rope from accidentally slipping in an undesired direction. If the rope section extending from the capstan drum accidentally detaches from the self-tensioning groove, the load-holding element can prevent the rope from unwinding from the capstan drum, or at least make it more difficult.

[0011] The load-holding element can be arranged at a distance from the capstan drum, allowing for a simple capstan winch design. Alternatively or additionally, the load-holding element can be arranged at a distance from the self-tensioning device, which also allows for a simple capstan winch design. The load-holding element can be a sheet cleat. Sheet cleats are reliable clamps and effectively and reliably prevent unwanted rope slippage.

[0012] In a preferred embodiment of the capstan winch, the capstan winch is provided with a rope deflection device. The rope deflection device can be arranged between the capstan drum and the self-tensioning device in a rope guide direction. The rope deflection device serves to deflect the rope leading from the capstan drum to the self-tensioning device. At least one deflection pulley can be provided as the rope deflection device.

[0013] The rope deflection device, particularly if designed as a pulley, can have a rotational axis parallel to the rotational axis of the capstan drum. This achieves advantageous rope guidance. Alternatively or additionally, the rope deflection device can have a rotational axis parallel to the rotational axis of the self-tensioning device. This alignment improves rope guidance between the rope deflection device and the self-tensioning device. The rope deflection device can be designed as a pulley, which represents a structurally simple type of deflection. It should be noted at this point that the self-tensioning device and the capstan drum can have congruent axes of rotation or even a common axis of rotation.

[0014] The capstan winch can have a control unit configured to control the motor. The control unit can, in particular, be configured to control the direction of rotation of the motor. Thus, a forward gear and a reverse gear can be available for operating the capstan winch. The forward and reverse gears can be used to drive the capstan drum in two different directions of rotation or to switch a transmission, described in more detail below, between a power gear and an overdrive gear. Alternatively or additionally, the control unit can be configured to control the speed of the motor. Thus, rotation of the capstan drum can be achieved at different speeds, for example, fast and slow. The forward and reverse gears can also be used to drive the capstan drum in the same direction of rotation.For this purpose, the capstan winch can have a corresponding gearbox, which can be arranged between the motor and the capstan drum.

[0015] The control unit of the capstan winch can have an interface for receiving control signals, so that the capstan winch can be remotely controlled using a remote control. Alternatively or additionally, the interface can also be configured to transmit control signals. The remote control can be connected to the capstan winch, for example, via a cable, so that an operator can operate it from a safe distance. Preferably, the control unit has an interface configured to receive wirelessly transmitted control signals. Alternatively or additionally, the interface can also be configured to transmit wireless control signals. Such a wireless interface enables the use of a wireless remote control, for example a radio remote control.A wireless remote control allows the operator of the capstan winch to remain at a sufficient safe distance from the capstan winch without the need for a potentially disruptive cable connection.

[0016] As already mentioned above, a gearbox can be arranged between the motor and the capstan drum of the capstan winch. The gearbox can be configured to receive and convert a torque and / or a speed and / or a direction of rotation of the motor. For example, the gearbox can increase or decrease the speed of the motor. This allows the operator to set a suitable speed for the respective application, which can, for example, influence the speed at which an object is pulled. Furthermore, the gearbox can be configured to increase and / or decrease the torque output by the motor.

[0017] The capstan winch's transmission can be a two-speed gearbox, providing a power gear and an overdrive gear. This allows an operator to take advantage of the engine's power, for example, by pulling a light object faster and a heavy object slower.

[0018] In one embodiment of the capstan winch, it has a rope guide element arranged behind the self-tensioning device in the rope guide direction. The rope section clamped in the self-tensioning device can be released from the self-tensioning device using the rope guide element. The rope guide element can be movable between an initial position and a use position. This allows the operator to control where the rope section is to be guided out of the self-tensioning device. The rope guide element can be a rope guide pin, which represents a simple design.

[0019] The capstan winch's motor can be an electric motor or a combustion engine. With an electric motor, the capstan winch can operate quietly and without local exhaust emissions.

[0020] In an embodiment of the capstan winch with an electric motor, the capstan winch can have a power connection for wired power supply and / or be equipped with a battery for wireless power supply.

[0021] In one embodiment of the capstan winch, the capstan drum can have a cylindrical shape. In another embodiment of the capstan winch, the capstan drum can have a conically tapered shape. This leads to advantageous winding of the rope on the capstan drum. In particular, the capstan drum has a conically tapered shape toward or extending from the self-tensioning device, which is advantageous for rope guidance on the capstan drum.

[0022] The capstan drum of the capstan winch can have a rough surface. Alternatively or additionally, the capstan drum can have a protruding and / or ribbed surface. These designs promote increased friction between the capstan drum and the rope, thus improving the power transmission from the capstan drum to the rope.

[0023] In an advantageous embodiment of the capstan winch, the self-tensioning device has a tool attachment point for a tool for manually cranking the capstan drum. This allows the capstan winch to be operated manually, for example, when the motor is unavailable.

[0024] The portable capstan winch is designed for use as a forestry capstan winch. As a forestry capstan winch, it can be used for lifting, pulling, lowering, or releasing trees or logs, for example. The portable capstan winch can be used as a forestry capstan winch for pulling and / or lifting operations.

[0025] The invention is described in more detail below using an exemplary embodiment, but is not limited to the exemplary embodiment. Further exemplary embodiments result from combining the features of one or more claims with one another and / or with one or more features of the exemplary embodiment.

[0026] It shows Fig. 1a capstan winch in perspective view from the front, Fig. 2the capstan winch from Fig. 1 in another perspective view from the front, Fig. 3 the capstan winch from Fig. 1-2 in side view from the front, Fig. 4the capstan winch from Fig. 1-3in side view from behind with a remote control, Fig. 5the capstan winch from Fig. 1-4 in perspective view from behind, Fig. 6 the capstan winch from Fig. 1-5 in perspective view from behind without battery, Fig. 7 a battery in perspective view and Fig. 8 a gearbox in perspective view.

[0027] The Figures 1 to 6 show a portable capstan winch 1, designated overall by 1. The capstan winch 1 comprises a capstan drum 2, a motor 3, and a self-tensioning device 4 for automatically tensioning a cable section 5 extending from the capstan drum 2. In the embodiments of the capstan winch 1 shown in the figures, the motor 3 is an electric motor. In an embodiment not shown, the capstan winch 1 is equipped with an internal combustion engine.

[0028] The self-tensioning device 4 has an upper pulley 6 and a lower pulley 7, between which a self-tensioning groove 8 is formed. The self-tensioning groove 8 is designed to accommodate the outgoing cable section 5. The cable section 9 inserted into the self-tensioning groove 8 is clamped by spring force. The upper pulley 6 and lower pulley 7 are pre-tensioned for this purpose. This pre-tension can be generated by a compression spring.

[0029] In the illustrated embodiments, the self-tensioning device 4 is connected to a free end 10 of the capstan drum 2 and is connected to the capstan drum 2 in a rotationally fixed manner. The capstan winch 1 has a carrying handle 11 for manual carrying. Downstream of the capstan drum 2 in a cable guide direction 29, the capstan winch 1 has a load-holding element 12, spaced apart from the capstan drum 2 and the self-tensioning device 4, which is designed here as a sheet clamp. This element serves to secure the cable 13 against slipping in the direction opposite to the cable guide direction 29.

[0030] Downstream of the load-holding element 12 in the cable guide direction 29, the capstan winch 1 has a cable deflection 14 arranged between the capstan drum 2 and the self-tensioning device 4. From the capstan drum 2, the cable 13 thus runs through the load-holding element 12 and via the cable deflection 14 to the self-tensioning device 4. In the illustrated embodiment, the cable deflection 14 is designed as a deflection pulley.

[0031] A rotation axis 15 of the rope deflection 14 runs parallel to the common rotation axis 16 of the capstan drum 1 and the self-tensioning device 4. Since the self-tensioning device 4 is arranged in a rotationally fixed manner on the capstan drum 1, the self-tensioning device 4 and the capstan drum 1 have the same rotation axis 16.

[0032] The capstan winch 1 has a control unit 17 configured to control the direction of rotation and the speed and direction of rotation of the motor 3. The control unit 17 has an interface for receiving and transmitting wirelessly transmitted control signals, so that the capstan winch 1 can be remotely controlled using a wireless remote control 18. The remote control 18 is in Fig. 4 shown in a side view.

[0033] A gearbox 19 is arranged between the motor 3 and the capstan drum 2. This gearbox is designed to increase and decrease the drive speed and drive torque of the motor 3. Furthermore, the gearbox 19 is designed as a direction-dependent two-speed gearbox, which provides a power gear and an overdrive gear depending on the direction of rotation fed into the gearbox 19.

[0034] Fig. 8shows the gear 19 of the capstan winch 1. A drive shaft 24 of the motor 3 transmits a torque to gears 25 of the gear 19 in order to drive the capstan drum 2 via a drive shaft 26 of the capstan drum 2.

[0035] The operator can select a power gear and an overdrive gear. When rotating clockwise, torque is transmitted to a gear 27 of the power gear, while a sleeve freewheel between a gear 28 of the overdrive gear and the drive shaft 24 prevents torque transmission between the drive shaft 24 and the gear 28.

[0036] When the drive shaft 24 rotates counterclockwise, a torque is transmitted to the gear 28 of the overdrive gear of the transmission 19, whereby a sleeve freewheel between the gear 27 for the power gear and the drive shaft 24 prevents a torque transmission between the drive shaft 24 and the gear 27.

[0037] Of course, the reverse directions—i.e., driving the power gear by counterclockwise rotation and driving the overdrive gear by clockwise rotation—are also conceivable and encompassed by the invention. It is also conceivable for the transmission to comprise only one power gear or only one overdrive gear.

[0038] In order to release the cable 13 from the self-tensioning groove 8, a cable guide element 20 is arranged behind the self-tensioning device 4. The cable guide element 20 is designed as a cable guide pin and is movable between an initial position and a use position. The initial position is in Fig. 2 shown, wherein the cable guide element 20 is folded away from the self-tensioning device 4. Fig. 1 shows the rope guide element 20 in its position of use close to the self-tensioning device 4 in order to lead the rope 13 out of it.

[0039] The capstan drum 2 has a cylindrical shape or a shape that tapers conically from the self-tensioning device 4 or toward the self-tensioning device 4. The conical shape of the capstan drum 2 can improve rope guidance on the capstan drum 2. To increase friction between the capstan drum 2 and the rope 13, the capstan drum 2 has a rough and / or ribbed surface in an embodiment not shown.

[0040] In Fig. 3 it is shown that the self-tensioning device 4 has a tool engagement point 21 for a tool for manually cranking the capstan drum 2.

[0041] The capstan winch 1 shown is designed for use as a forestry capstan winch and is used for pulling and / or lifting operations.

[0042] According to the Fig. 1-5The capstan winch 1 has a battery 22 which serves to supply power to the motor 3. The battery 22 can be detached from its connection position on the motor 3, as shown in Fig. 6 shown. In Fig. 7 the battery is shown as a separate part.

[0043] The capstan winch 1 has a load-holding handle 23 to which, for example, a strap can be attached in order to secure the capstan winch 1 to a fixed point, such as a tree. List of reference symbols

[0044] 1 Capstan winch 2 Capstan drum 3 Motor 4 Self-tensioning device 5 Outgoing rope section 6 Upper pulley 7 Lower pulley 8 Self-tensioning groove 9 Rope section in self-tensioning groove 10 Free end of the capstan drum 11 Carrying handle 12 Load-holding element 13 Rope 14 Rope deflection 15 Rotation axis of the rope deflection 16 Rotation axis of the self-tensioning device / capstan drum 17 Control unit 18 Remote control 19 Gearbox 20 Rope guide element 21 Tool attachment point 22 Battery 23 Load-holding handle 24 Motor drive shaft 25 Gear 26 Capstan drum drive shaft 27 Power gear gear 28 Overdrive gear 29 Rope guide direction

Claims

1. Portable capstan winch (1) with a capstan drum (2), a motor (3) for driving the capstan drum (2), and a self-tensioning device (4) which is designed to automatically tension a rope section (5) leading from the capstan drum (2).

2. Portable capstan winch (1) according to claim 1, characterized in that the self-tensioning device (4) has an upper pulley (6) and a lower pulley (7), between which a self-tensioning groove (8) is formed for receiving the rope section (5) extending from the capstan drum (2).

3. Portable capstan winch (2) according to claim 2, wherein the upper disc (6) and the lower disc (7) are pre-tensioned by spring force to clamp a cable section (9) inserted into the self-tensioning groove (8), in particular wherein at least one compression spring is arranged between the upper disc (6) and the lower disc (7).

4. Portable capstan winch (1) according to one of the preceding claims, characterized in thatthe self-tensioning device (4) is arranged at a free end (10) of the capstan drum (2) and / or is connected to the capstan drum (2) in a rotationally fixed manner.

5. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan winch (1) is manually portable, in particular wherein the capstan winch (1) has at least one carrying handle (11).

6. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan winch (1) has a load-holding element (12), in particular a sheet clamp, which is preferably arranged at a distance from the capstan drum (1) and / or the self-tensioning device (4).

7. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan winch (1) has a cable deflection (14), in particular a deflection pulley, preferably wherein the cable deflection (14) is arranged in a cable guide direction (29) between the capstan drum (2) and the self-tensioning device (4).

8. Portable capstan winch (1) according to the preceding claim, characterized in that the rope deflection (14), in particular the deflection pulley, has a rotation axis (15) which is aligned parallel to the rotation axis (16) of the capstan drum (2) and / or the self-tensioning device (4).

9. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan winch (1) has a control unit (17) which is designed to control the motor (3), in particular to control a direction of rotation and / or a speed of the motor (3).

10. Portable capstan winch (1) according to the preceding claim, characterized in that the control unit (17) has an interface for receiving and / or transmitting control signals, preferably transmitted wirelessly, so that the capstan winch (1) can be remotely controlled by a remote control (18).

11. Portable capstan winch (1) according to one of the preceding claims, characterized in thata gear (19) is arranged between the motor (3) and the capstan drum (2), which gear is designed to increase and / or decrease a drive speed and / or a drive torque of the motor (3).

12. Portable capstan winch (1) according to the preceding claim, characterized in that the transmission (19) is a two-speed transmission, preferably one that is dependent on the direction of rotation, which provides a power gear and an overdrive gear.

13. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan winch (1) has a cable guide element (20), in particular a cable guide pin, which is preferably movable between an initial position and a use position and which is arranged behind the self-tensioning device (4) in the cable guide direction (29).

14. Portable capstan winch (1) according to one of the preceding claims, characterized in that the motor (3) is an electric motor or an internal combustion engine.

15. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan drum (2), in particular starting from or towards the self-tensioning device (4), has a conically tapered shape, or that the capstan drum (2) is cylindrical.

16. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan drum (2) has a rough and / or ribbed surface.

17. Portable capstan winch (1) according to one of the preceding claims, characterized in that the self-tensioning device (4) has a tool engagement point (21) for a tool for manually cranking the capstan drum (2).

18. Portable capstan winch (1) according to one of the preceding claims, characterized in that the capstan winch (1) is designed for use as a forestry capstan winch.

19. Use of a portable capstan winch (1) according to one of the preceding claims as a forestry capstan winch for pulling and / or lifting work.

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