Emergency brake device for a winch with a winch that is rotatable about an axis of rotation, winch and method for operating an emergency brake device

Abstract

An emergency braking device (102) for a cable winch (102) with a rotatable cable drum (104) is presented, wherein the emergency braking device comprises a braking unit (108) configured to decelerate the cable drum (104) when a translational force acts on the braking unit (108), further comprising a driver (110) rotatable about the axis of rotation (106) and linearly movable along the axis of rotation (106) and configured to engage in a driver contour of the cable drum (104) in an active state of the emergency braking device (102) in order to transmit a rotational movement of the cable drum (104) to the driver (110), and an adjuster (112) with a thread (114) and a connecting structure (116), wherein the adjuster (112) and the driver (110) are connected via the connecting structure (116) in a rotationally fixed and linearly movable manner, and wherein the thread (114) engages in a counter thread (118),to cause a linear movement of the feeder (112) in the direction of the brake unit (108) by means of the rotary movement transmitted to the feeder (112), in order to exert the translational force on the brake unit (108).

Description

State of the art

[0001] The invention relates to an emergency braking device for a cable winch with a cable drum rotatable about a rotation axis, a cable winch and a method for operating an emergency braking device according to the preamble of the independent claims.

[0002] Cable winches are used in the rescue sector, for example, in conjunction with helicopters as rescue winches, which typically meet a "Loss of HEC" requirement of the WASA. US 5904229 A1 concerns a brake assembly used as an automatically activated emergency brake for lifting platforms and elevators, among other things.

[0003] Against this background, the approach presented here provides an improved emergency braking device for a cable winch with a cable drum rotatable about a rotational axis, an improved cable winch, and an improved method for operating an emergency braking device according to the main claims. The measures listed in the dependent claims enable advantageous refinements and improvements of the device specified in the independent claim.

[0004] The approach presented here describes an emergency braking device that can be configured to decelerate a falling load, such as a person hanging from a rope, to a standstill without the need for additional energy. Sudden braking can also be avoided. This allows, for example, a maximum force acting on the rope to be reduced until a standstill is reached. This allows, for example, a sudden, sharp increase in force acting on the rope to be reduced.

[0005] An emergency braking device for a cable winch with a cable drum rotatable about a rotational axis is presented, wherein the emergency braking device has a braking unit designed to brake the cable drum when a translational force acts on the braking unit. The emergency braking device also has a driver that is rotatable about the rotational axis and linearly movable along the rotational axis and is shaped to engage with a driver contour of the cable drum in an active state of the emergency braking device in order to transmit a rotational movement of the cable drum to the driver, as well as a deliverer with a thread and a connecting structure, wherein the deliverer and the driver are connected via the connecting structure in a rotationally fixed manner and for linear movement along the rotational axis.The thread engages in a counter thread in order to cause a linear movement of the deliverer in the direction of the brake unit through the rotational movement transmitted from the driver to the deliverer in order to exert the translational force on the brake unit.

[0006] The emergency braking device can, for example, be described as a one-time brake that is activated in emergencies, for example in the event of an uncontrolled abseil, and can therefore be safety-relevant. The emergency braking device can, for example, be arranged on a helicopter with a cable winch, such as a rescue helicopter. The cable winch can be designed to unwind a cable so that, for example, people and, additionally or alternatively, objects can be lifted or lowered. For this purpose, the cable can be wound around the cable drum. When the emergency braking device is inactive, the driver can be decoupled from the cable drum so that movement of the cable drum is not impeded by the emergency braking device. For example, when inactive, the driver can be held away from the cable drum using a restraint device.In the active state, the driver can be pressed against the driver using a spring. The deliverer can, for example, be screwed towards the cable drum using the thread and the counter thread, thus exerting the translational force on the brake unit. The counter thread can be fixed. For example, the counter thread can be fixedly arranged on a housing of the cable winch or a structure. The counter thread can thus be decoupled from a rotation of the cable drum, so that the cable drum can rotate relative to the counter thread. The brake unit can brake the cable drum using the translational force, which can thus act as a braking force. The magnitude of the translational force can advantageously be related to a torque acting on the cable drum, which is caused, for example, by a falling load.Thus, the translational force can depend on the rotational speed of the cable drum, so that the translational force can always be sufficient to decelerate the cable drum. The driver can advantageously engage the driver contour in a form-fitting manner, allowing these two components to be firmly connected.

[0007] The emergency braking device can be used for various applications where rotating objects must be brought to a complete stop (emergency stop). Thus, the cable drum represents a rotating part that can be stopped by the emergency braking device.

[0008] According to one embodiment, the delivery device can have a retaining collar with the connecting structure and a receiving section for receiving a spring unit, wherein the spring unit can be secured in an inactive state of the emergency braking device. The spring unit can be released in the active state of the emergency braking device in order to be able to press the driver along the axis of rotation into the driver contour. The connecting structure can therefore be implemented in the retaining collar, for example as a through-opening or as a recess. The receiving section can be designed as a niche-like recess so that the spring unit fits into it. The released spring unit can advantageously cause the linear movement of the driver in order to connect the driver in a rotationally fixed manner to the cable drum.

[0009] For example, the carrier can be held in place in the inactive state of the emergency braking device using a cable, such as a steel cable. The cable can counteract a preloaded wave spring, which can press the carrier against the cable drum if the cable is severed.

[0010] According to one embodiment, the emergency braking device can have a trigger that can be configured to release the spring unit. The trigger can be actuated manually by a user, for example, or automatically, for example, when a certain rotational speed of the cable drum is exceeded. For example, the trigger can comprise a pyrotechnic device with which a restraint device for restraining the driver is destroyed. For example, a cable for restraining the driver can be severed using the trigger. Advantageously, the emergency braking device can be referred to as a safety component, which can be configured to protect people.

[0011] According to one embodiment, the brake unit may comprise a brake disc and a brake pad, wherein the brake disc may be configured to be pressed against the brake pad using the translational force to decelerate the cable drum. The translational force may advantageously be dependent on the rotational speed and additionally or alternatively on the falling load, i.e., the person hanging from the cable, so that the cable drum can be decelerated.

[0012] Furthermore, the feeder can be shaped to press the brake disc against the brake pad. This means that the brake disc can be pressed against the brake pad, and the resulting frictional force can slow down and ultimately stop the rotation of the cable drum.

[0013] According to one embodiment, the brake pad can be rigidly connected to the cable drum. For example, the brake pad can be formed as an annular extension of the cable drum.

[0014] The brake unit can comprise a brake assembly comprising the brake disc, a support, and an additional spring unit arranged between the brake disc and the support. Using the additional spring unit can prevent a sudden stop of the cable drum. Advantageously, the braking process can be perceived more comfortably for a person hanging from the cable, as the spring unit mitigates the braking effect.

[0015] According to one embodiment, the driver can have at least one projection that can be designed to engage the driver contour. The projection can be referred to, for example, as a retaining element and can be shaped, for example, as a tooth that can engage the driver contour. The driver contour can form at least one ramp. This can advantageously prevent the driver from engaging the driver contour when the cable drum moves in a direction of rotation for winding the cable.

[0016] Furthermore, a cable winch with a cable drum rotatable about a rotation axis and with an emergency braking device in a previously mentioned variant is presented.

[0017] The cable winch can advantageously be designed for rescue helicopters, such as those used in the mountains or on water. The cable drum can advantageously be designed to wind up a rescue rope and additionally or alternatively unwind it. For this purpose, the cable drum can be arranged so that it can move around the rotation axis.

[0018] Furthermore, a method for operating an emergency braking device in a previously mentioned variant is presented. The method comprises a step of engaging the driver in the driver contour of the cable drum in order to transmit the rotational movement of the cable drum to the driver, a step of transmitting the rotational movement from the driver to the deliverer, a step of causing the linear movement of the deliverer in the direction of the braking unit by the engagement of the thread in the counter-thread and by the rotational movement transmitted from the driver to the deliverer, and a step of exerting a translational force on the braking unit through the linear movement of the deliverer in order to brake the cable drum using the braking unit.

[0019] The method advantageously allows the cable winch to be secured for emergencies, so that the cable drum can be braked and brought to a standstill using the emergency braking device in the event of, for example, an uncontrolled abseil.

[0020] According to one embodiment, the method may include a step of unlocking the emergency braking device using a trigger to enable the driver to engage the driver contour. For example, the emergency braking device may be activated by the unlocking step.

[0021] Examples of the approach presented here are shown in the drawings and explained in more detail in the following description. It shows: Fig. 1 a schematic sectional view of a cable winch with an emergency braking device according to an embodiment; Fig. 2a schematic sectional view of an embodiment of a cable winch; Fig. 3 a schematic representation of a driver according to an embodiment; Fig. 4 a schematic representation of a cable drum with a driver contour according to an embodiment; Fig. 5 a schematic sectional view of an embodiment of an arrangement of a deliverer and a driver; Fig. 6 a schematic sectional view of a portion of an emergency braking device according to an embodiment; Fig. 7 a schematic representation of a brake pad according to an embodiment; Fig. 8 a schematic representation of a spring-loaded brake disc according to an embodiment; Fig. 9 a schematic representation of an embodiment of a spring-loaded brake disc; and Fig. 10 a flowchart of an embodiment of a method for operating an emergency braking device.

[0022] In the following description of advantageous embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, whereby a repeated description of these elements is omitted.

[0023] Fig. 1shows a schematic sectional view of a cable winch 100 with an emergency braking device 102 according to one exemplary embodiment. The cable winch 100 is arranged, for example, in or on a helicopter, for example a rescue helicopter. According to this exemplary embodiment, the cable winch 100 is shown in a longitudinal section and has the emergency braking device 102 and a rotating part, for example in the form of a cable drum 104. The cable drum 104 is designed, for example, to wind up or unwind a cable and is therefore rotatable about a rotation axis 106. Even though the invention is described here with reference to a cable winch 100, the emergency braking device 102 can also be used to brake other rotating parts, for example a rotating machine part of a work machine. In such a case, the cable drum 104 can be understood, for example, as a section of a shaft.

[0024] The emergency braking device 102 is also referred to, for example, as an arrestor and comprises a braking unit 108, a driver 110, and a feeder 112. The braking unit 108 is designed to brake the cable drum 104 when a translational force acts on the braking unit 108. The braking unit 108, or at least parts thereof, are arranged or can be arranged, for example, on a housing. The driver 110 is rotatable about the rotation axis 106 and is arranged for linear movement along the rotation axis 106.

[0025] The driver 110 is shaped to engage with a driver contour of the cable drum 104 in an active state of the emergency braking device 102, also referred to as the braking state, in order to transmit a rotational movement of the cable drum 104 to the driver 110. The driver 110 is also rotationally fixed to the feeder 112 and linearly connected along the rotation axis 106, i.e., movably connected in the direction of the cable drum 104. For this purpose, the feeder 112 has a thread 114 and a connecting structure 116. The feeder 112 is coupled to the driver 110 via the connecting structure 116, which is shaped, for example, as a through-opening. The thread 114 engages with a fixed counter-thread 118 that is decoupled from any rotation of the cable drum 104. A torque transmitted from the cable drum 104 via the driver 110 to the thread 114 thus leads to a rotation of the thread 114 in the counter thread 118.This results in a linear movement of the feeder 112 toward the cable drum 104 and thus toward the brake unit 108, allowing the translational force to be exerted on the brake unit 108. This means that the emergency brake device 102 screws in using the thread 114 and the counter-thread 118 when a load, for example, a person hanging from a cable, falls. The emergency brake device 102, or more precisely, the brake unit 108, absorbs the load, which acts as a translational force on the brake unit 108, and stops the rotational movement.

[0026] Advantageously, energy from a rotating part, here, for example, the cable drum 104, is absorbed via the thread 114 and the counter-thread 118 and used to decelerate the rotating part. If the thread 114 and the counter-thread 118 are designed to be stiff, the energy of the rotating part can be converted into heat energy via the thread 114 and the counter-thread 118, thereby slightly decelerating the rotating part.

[0027] According to one embodiment, the deliverer 110 has an annular retaining collar 120 on which the connecting structure 116 is arranged or into which it is integrated. According to one embodiment, the deliverer 112 has a receiving section 122 designed to receive a spring unit 124. The spring unit 124 is further secured in an inactive state of the emergency braking device 100 and is released in the active state of the emergency braking device 100 in order to press the driver 110 along the rotation axis 106 into the driver contour. Only optionally does the emergency braking device 100 have a trigger designed to release the spring unit 124. The trigger is actuated, for example, manually by a user or mechanically, for example, when the rotational speed of the cable drum 104 is exceeded. For example, the trigger comprises pyrotechnics used to release the preloaded driver 110.After the driver 110 is released, an unintentional unwinding of the rope from the rope drum 104 can be reliably prevented by using the emergency braking device 102.

[0028] According to one exemplary embodiment, the brake unit 108 has a brake disc 126 and a brake pad 128. The brake disc 126 is shaped to act on the brake pad 128 using the translational force. In other words, the brake disc 126 is pressed onto the brake pad 128, and the resulting frictional force slows down the rotational movement of the cable drum 104. According to this exemplary embodiment, the feeder 112 is accordingly shaped to press the brake disc 126 onto the brake pad 128. This is achieved, for example, by means of a connection point between the feeder 112 and the brake unit 108 in the region of the retaining collar 120. Overall, the brake unit 108 according to this exemplary embodiment is designed in a ring-like manner. According to one exemplary embodiment, the brake disc 126 is decoupled from the rotation of the cable drum 104, i.e., it does not rotate with the cable drum 104.The brake pad 128, on the other hand, is rigidly coupled to the cable drum 104 and rotates accordingly with the cable drum 104. According to one embodiment, the brake disc 126 is coupled to a further spring unit 130, which is designed to at least partially counteract the translational force in order to prevent a sudden stop of the cable drum 104. Instead, using the further spring unit 130, a comparatively gentle braking is achieved, so that, for example, the cable and the person are protected during the braking process. In other words, the spring force counteracts the translational force.

[0029] According to one embodiment, the emergency braking device 102 is designed as an arrestor, i.e., an emergency brake, without an energy storage device. The emergency braking device 102 is configured to stop the cable drum 104 if the cable unwinds uncontrollably. Only optionally, the cable drum 104 is implemented as a direct winder or, for example, as a capstan winch and is brought to a standstill by means of the emergency braking device 102. The utilization of the rotational energy of the cable drum 104 and the falling load ensures that the corresponding braking pressure, described here as a translational force, is generated for each falling load, up to a standstill or a halt.

[0030] In other words, it is a brake that uses the energy of the rotating cable drum 104 to close the thread 114. The frictional engagement is created by the energy of the rotating cable drum 104 and the falling load and is thus so great that the cable drum 104, and thus also the falling load, comes to a standstill. The brake is designed as a one-time brake. It cannot be easily opened, so it is designed or can be designed as a safety element.

[0031] The driver 110, which is spring-loaded according to one embodiment, is brought into engagement with the driver structure and released, for example, using a trigger. This initiates the rotation. The driver 110 then transfers the rotation to the feeder 112, with the driver 110 and the feeder 112 being rotationally fixed to one another. Since the feeder 112 has the thread 114 on the rotation axis 106, also referred to as the rotation axis, and the counter thread 118 is immovable with respect to the rotation of the feeder 112, this rotation leads to a translation of the feeder 112.

[0032] The translation pushes the rotation-free brake disc 126, which is spring-loaded to prevent the braking force from increasing too suddenly, against the brake pad 128 on the cable drum 104. The further the cable drum 104 rotates, the greater the pressing force becomes between the braking surfaces, described here as the brake disc 126 and the brake pad 128. The frictional engagement between the brake disc 126 and the brake pad 128 causes the cable drum 104 to stop.

[0033] Fig. 2 shows a schematic sectional view of an embodiment of a cable winch 100. The Fig. 2 The cable winch 100 shown has the emergency braking device 102 at least partially, wherein the cable winch 100 and thus also the emergency braking device of the Fig. 1described cable winch 100. According to this exemplary embodiment, the emergency braking device 102 is shown without the previously described deliverer. Instead, according to this exemplary embodiment, an effective direction of the direction of movement 200 of the driver 110 in the direction of the cable drum 104 is symbolically shown. According to this exemplary embodiment, fastening elements 202, for example screws or rivets, are also shown, which are designed, for example, to fasten the deliverer to the spring unit 124. By way of example, the spring unit 124 is designed as a wave spring. The driver 110 further has a stabilizing structure 204, by means of which the driver 110 is stabilized, for example, in its position.

[0034] Fig. 3 shows a schematic representation of a driver 110 according to an embodiment. The driver 110 corresponds, for example, to the one shown in at least one of the Figures 1 to 2described driver 110. According to this exemplary embodiment, it is clear that the driver 110 is essentially ring-shaped. Furthermore, the driver 110 according to this exemplary embodiment has at least one projection 300, more precisely two opposing and similarly shaped projections 300. The at least one projection 300 is designed to engage in the driver contour. The projection 300 further has an elongated through-opening 302. Furthermore, the driver 110 according to this exemplary embodiment has a first holding section 304, a second holding section 306 opposite the first holding section 304, a third holding section 308 arranged between the first holding section 304 and the second holding section 306, and a fourth holding section 310 opposite the third holding section 308.The first holding section 304 and the second holding section 306 are optionally designed to be identical. Furthermore, the third holding section 308 and the fourth holding section 310 are optionally designed to be identical. According to this exemplary embodiment, the first and second holding sections 304, 306 each have an engagement opening 312. In contrast, the third and fourth holding sections 308, 310 each have a receiving opening 314, which is shaped, for example, to insert or screw in a fixing element.

[0035] Fig. 4 shows a schematic representation of a cable drum 104 with a driver contour 400 according to an embodiment. The cable drum 104 shown here corresponds, for example, to the one shown in one of the Figures 1 to 2 described cable drum 104. The driver contour 400 is formed, for example, in such a way that the projections of the driver, as they are shown, for example, in Fig. 3described, engage in them. The driver contour 400 functions, for example, as a rail in which the driver rotates by a maximum of 180° until it encounters a stop edge 402 of the driver contour 400. Optionally, the driver contour 400 additionally has a further stop edge 404, which is arranged opposite the stop edge 402. In the region of the stop edge 402, the driver contour 400 is shaped in steps and from there falls away until it encounters the further stop edge 404. The further stop edge 404 is therefore implemented analogously to the stop edge 402, so that the further stop edge 404 is also shaped in steps. Overall, the number of stop edges 402, 404 on the driver contour 400 is equal to the number of projections on the driver.

[0036] According to one embodiment, the driver contour 400 is shaped like a ramp. For example, the driver contour 400 forms at least one, here two, ramps 406. The ramp-like shape of the driver contour 400 enables continuous rotation of the cable drum 104 in one direction of rotation, even when the driver engages with the cable drum 104. This enables rotation of the cable drum 104 to retract the cable even when the emergency brake device is activated. In contrast, the rotation of the cable drum 104 in the opposite direction of rotation is very quickly stopped by the engagement of the driver and the resulting activation of the brake unit.

[0037] Fig. 5 shows a schematic sectional view of an embodiment of an arrangement of a deliverer 112 and a driver 110. The driver 110 corresponds, for example, to the one shown in one of the Figures 1 to 3described driver 110 and the deliverer 112 corresponds, for example, to the one in Fig. 1 described feeder 112. Here, too, the spring unit 124 is arranged in the receiving area 122 of the feeder 112, by which the driver 110 is pressed into the driver contour of the cable drum. The driver 110 and the feeder 112 are also connected to one another via the retaining collar 120, which has the connecting structure 116. Here, too, the thread 114 is arranged on the feeder 112, which engages the mating thread 118. According to this exemplary embodiment, a section 500 is marked, which is described in more detail in the following figure.

[0038] Fig. 6 shows a schematic sectional view of a section 500 of an emergency braking device according to an embodiment. The section 500 is shown enlarged and corresponds, for example, to the section shown in Fig. 5mentioned section 500. The section 500 therefore corresponds to a contact area in which the driver 110 contacts the feeder 112 and the feeder 112 contacts the thread 114. Furthermore, the thread 114 is arranged such that it can interact with the counter-thread 118 and thus engages the counter-thread 118. The thread 114 is temporarily rotating, i.e., starting from an activation of the emergency braking device by engagement of the driver in the cable drum, until the cable drum comes to a standstill. The counter-thread 118, on the other hand, is fixed, i.e., in particular, fixed in relation to the rotation of the cable drum. This enables a screwing movement of the feeder 112 and / or the driver 110 in order to, using the braking unit, as used, for example, in Fig. 1 described to stop the rotation of the rope drum.

[0039] Fig. 7shows a schematic representation of a brake pad 128 according to one embodiment. According to this embodiment, the brake pad 128 is arranged on the cable drum 104, which according to one embodiment is at least partially hollow. According to this embodiment, the brake pad 128 is arranged in a ring around the driver contour 400. This means that the brake pad 128 has a larger diameter than the driver structure 400. For example, the cable drum 104 and the brake pad 128 are formed as a single piece. Alternatively, the brake pad 128 is attached to the cable drum 104.

[0040] Fig. 8 shows a schematic representation of a brake assembly 826 with a spring-loaded brake disc 126 according to an embodiment. The brake disc 126 corresponds, for example, to the brake assembly 826 shown in Fig. 1described brake disc 126. According to this embodiment, the further spring unit 130 is designed as part of the brake package 826 between a receptacle 830 and the brake disc 126. More precisely, the further spring unit 130 is arranged on the rear side of a braking surface 800 of the brake disc 126, which in a braking operation is acted upon by the Fig. 7shown brake pad is pressed. On the rear side, the brake disc 126 has, according to one embodiment, at least one, here two, holding elements on the receptacle 830, which are implemented differently. A first holding element 802 of the holding elements is pin-like according to this embodiment, and a second holding element 804 of the holding elements is shaped as a receptacle, so that, for example, a rotational movement of the brake assembly 826 and thus of the brake disc 126 is prevented. The brake disc 126 and the receptacle 830 are ring-shaped according to this embodiment. The spring unit 130 has, according to one embodiment, a plurality of springs which are distributed between the receptacle 830 and the brake disc 126. For example, coil springs are used as springs.

[0041] The mount 830 and the brake disc 126 are coupled to each other via the spring unit 130 and via a plurality of bolts that provide rotational locking. For example, the bolts are attached to the brake disc 126, and free ends of the bolts are received by receiving contours of the mount 830.

[0042] When the feeder is moved translationally as described due to the relative movement between the thread and the counter-thread, the feeder, according to one embodiment, exerts the activation force on the receptacle 830 and displaces the receptacle 830 and thus the entire brake assembly 826 toward the cable drum. As soon as the brake disc 126 touches the cable drum, further movement of the receptacle 830 toward the cable drum initially compresses the springs of the spring unit 130. As a result, the braking torque exerted on the cable drum via the brake disc 126 initially increases slowly. By appropriately designing the spring unit 130, which can also be referred to as a spring assembly, it is possible to control how quickly the braking effect of the emergency braking device increases.

[0043] Fig. 9 shows a schematic representation of an embodiment of a spring-loaded brake disc 126. The brake disc 126 is at least similar to the one shown in Fig. 8 described brake disc 126 and is shown here only from the rear. According to this exemplary embodiment, the receptacle 830 also optionally has the holding elements 802, 804. According to this exemplary embodiment, the brake disc 126 has only two spaced-apart first holding elements 802, which are designed in a pin-like manner, and the second holding element 804. The holding elements 802, 804 are designed as rotation-inhibiting elements and are translationally free.

[0044] Fig. 10 shows a flowchart of an embodiment of a method 1000 for operating an emergency braking device. The method 1000 is carried out, for example, for an emergency braking device as described, for example, in at least one of the Figures 1 to 2The method 1000 comprises an engagement step 1002, a transmission step 1004, an effecting step 1006, and an exerting step 1008. In engagement step 1002, an engagement of the driver in the driver contour of the cable drum is effected in order to transmit the rotational movement of the cable drum to the driver. In transmission step 1004, the rotational movement is transmitted from the driver to the deliverer. In effecting step 1006, the linear movement of the deliverer in the direction of the braking unit is effected by the engagement of the thread in the counter thread and by the rotational movement transmitted from the driver to the deliverer. In exerting step 1008, a translational force is exerted on the braking unit by the linear movement of the deliverer in order to brake the cable drum using the braking unit.

[0045] Only optionally, the method 1000 further comprises a step 1010 of releasing the emergency braking device using a trigger prior to the engagement step 1002, in order to cause the driver to engage the driver contour. For example, a cable for holding the driver back is severed. Subsequently, the driver is moved toward the cable drum, driven, for example, by a preloaded spring, in order to engage the cable drum.

Claims

1. Emergency braking device (102) for a cable winch (102) with a cable drum (104) rotatable about a rotation axis (106), the emergency braking device (102) having the following features: a braking unit (108) designed to brake the cable drum (104) when a translational force acts on the braking unit (108); a driver (110) rotatable about the rotation axis (106) and linearly movable along the rotation axis (106) and shaped to engage in a driver contour (400) of the cable drum (104) in an active state of the emergency braking device (102) in order to transmit a rotational movement of the cable drum (104) to the driver (110);and a deliverer (112) with a thread (114) and a connecting structure (116), wherein the deliverer (112) and the driver (110) are connected via the connecting structure (116) in a rotationally fixed manner and in a linearly movable manner along the axis of rotation (106), and wherein the thread (114) engages in a counter-thread (118) in order to effect a linear movement of the deliverer (112) in the direction of the braking unit (108) by means of the rotational movement transmitted from the driver (110) to the deliverer (112) in order to exert the translational force on the braking unit (108); characterized in that the driver (110) has at least one projection (300) which is designed to engage in the driver contour (400), wherein the driver contour (400) forms at least one ramp (406).

2. Emergency braking device (102) according to claim 1, wherein the deliverer (112) has a retaining collar (120) with the connecting structure (116) and a receiving portion (122) for receiving a spring unit (124), wherein the spring unit (124) is secured in an inactive state of the emergency braking device (102), and wherein the spring unit (124) is released in the active state of the emergency braking device (102) in order to press the driver (110) along the axis of rotation (106) into the driver contour (400).

3. Emergency braking device (102) according to claim 2, comprising a trigger configured to release the spring unit (124).

4. Emergency braking device (102) according to one of the preceding claims, wherein the braking unit (108) comprises a brake disc (126) and a brake pad (128), wherein the brake disc (126) is pressed against the brake pad (128) using the translational force in order to brake the cable drum (104).

5. Emergency braking device (102) according to claim 4, wherein the brake pad (128) is rigidly connected to the cable drum (104).

6. Emergency braking device (102) according to one of claims 4 to 5, wherein the braking unit (108) has a braking package (826) which comprises the braking disc (126), a receptacle (830) and a further spring unit (130) arranged between the braking disc (126) and the receptacle for preventing a sudden stopping of the cable drum (104).

7. A cable winch (100) comprising: an emergency braking device (102) according to any one of the preceding claims; and the cable drum (104) rotatable about the rotation axis (106).

8. A method (1000) for operating an emergency braking device (102) according to one of claims 1 to 6, wherein the method (1000) comprises the following steps: engaging (1002) the driver (110) in the driver contour (400) of the cable drum (104) in order to transmit the rotational movement of the cable drum (104) to the driver (110); transmitting (1004) the rotational movement from the driver (110) to the deliverer (112); causing (1006) the linear movement of the deliverer (112) in the direction of the braking unit (108) by the engagement of the thread (114) in the counter thread (118) and by the rotational movement transmitted from the driver (110) to the deliverer (112); and exerting (1008) a translational force on the braking unit (108) by the linear movement of the feeder (112) in order to brake the cable drum (104) using the braking unit (108).

9. Method (1000) according to claim 8, comprising a step (1010) of unlocking the emergency braking device (102) in order to cause the driver (110) to engage in the driver contour (400).

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