EP3947227A1

EP3947227A1 - Winch comprising a winding device

Info

Publication number: EP3947227A1
Application number: EP20715291.9A
Authority: EP
Inventors: Andrew Abele
Original assignee: Movecat GmbH
Current assignee: Movecat GmbH
Priority date: 2019-03-27
Filing date: 2020-03-23
Publication date: 2022-02-09
Also published as: CA3134631A1; US20220185620A1; WO2020193477A1; DE102019107937A1

Abstract

The invention relates to a winch (1) comprising a winding device (21), which is simply constructed and works reliably, regardless of the position and orientation of the winch (1). The winch (1) comprises a drum (9), a support means (11), a winding device (21) and a frame (3), wherein the frame (3) has a bearing for the drum (9) and a linear guide for the winding device (21), wherein the drum (9) has a screw-type groove (45) and the winding device (21) has a coupling roller (41), and wherein the coupling roller (41) has at least one collar (43) which engages into the screw-type groove (45) of the drum (9).

Description

Winch with winding device

description

The invention relates to a winch comprising a drum, a support means, a winding device and a frame, the frame having a bearing for the drum and a

Has linear guide for the winding device.

Winding with a cylindrical drum on the one

Suspension means can be wound up and unwound are known in many ways. You will be in the

various areas of application from stage technology to recovery winches or crane construction. The term "suspension means" includes both ropes, in particular Steel ropes, as well as electrical cables, carry electrical currents or signals with the help of various wires

Cable. In many cases, a cord is incorporated into such a cable as a mechanical strain relief for the wires of the cable. These are also "suspension means" within the meaning of the invention.

Ropes and electrical cables usually have a circular cross-section, so that it is advantageous if a on the cylindrical outer surface of the drum

helical groove is present. This

helical groove is in terms of pitch and

Cross-sectional contour is matched to the diameter of the suspension element to be wound. The cross-sectional contour is designed to be complementary to the cross-section of the suspension element. The slope of the groove is at least as great as that

Diameter of the suspension element.

This way of winding a cable or a suspension element on a drum is very advantageous because a very large groove is formed between the suspension element and the groove when it is wound

Contact surface arises. By winding or unwinding the suspension element on the drum, the suspension element is neither twisted, kinked, nor damaged in any other way.

So-called winding devices are known in order to ensure that the suspension element lies down in the groove of the drum even under the most adverse conditions. This

Spooling devices are nothing more than a guide for the suspension element, which is parallel to the axis of rotation of the drum and moved in depending on the rotational movements of the drum. When the drum has made one revolution, the winder shifts by the amount of

Slope of the groove on the drum.

To produce the desired coupling between the winding device and the speed of the drum, trapezoidal and

Ball screw spindles are known which are arranged parallel to the drum and which are coupled to the drum via a toothed belt or spur gear teeth. A nut, which is coupled to the winding device, is arranged on the threaded spindle. In this way the coupling between the winder and the drum is established

guaranteed. This embodiment works, but is relatively complex to manufacture and requires an adaptation of the screw drive for each diameter of the suspension element. It also requires a coupling between the drum and the threaded rod. This causes relatively high manufacturing costs and makes them error-prone.

The invention is based on the object of providing a winch that works very reliably and with little noise. The latter aspect is especially important at

Applications in stage technology are important. Any operating noise, squeaking or rattling is not acceptable in this profession. In addition, the winch should be easily adaptable to different diameters of the suspension element. According to the invention, this object is achieved by a winch comprising a drum, a support means, a

Spooling device and a frame, the frame having a bearing for the drum and a linear guide for the spooling device, the drum having a

helical groove and the winding device has a coupling roller, and wherein the coupling roller has at least one collar which engages in the helical groove of the drum. The federal government has therefore preferred

Design has a cross section which is complementary to the profile of the helical groove.

According to the invention it is therefore provided that the

Has a winding device a coupling roller with a collar. This fret intervenes in the role of the drum.

The axes of rotation of the drum and coupling roller are usually parallel to each other. But it is also possible, the axis of rotation of the coupling roller relative to the axis of rotation

The drum can be tilted slightly. The angle between the axes of rotation of the drum and the coupling roller corresponds to this

Angle of helix of the helical groove of the drum. This results in a particularly friction and

quiet running of the coupling roller.

Alternatively or in addition, it is also possible to make the collar of the coupling roller somewhat narrower in cross section than the profile of the groove. Then - even if the axes of rotation of the coupling roller and drum run parallel to each other - the collar can engage in the helical groove of the drum without play and with little friction. The frame of the winch according to the invention preferably has two side walls. These side walls can be made of sheet metal, for example by CNC laser cutting. On the side walls is a storage for the

Drum formed. The storage can be realized by sliding and / or roller bearings. The drum is preferably rotatably mounted at both ends.

The distance between the side walls of the frame is ideally provided by cross members. This

Traverses can be round bars, preferably made of metal, which each have an internal thread at their ends and are screwed to the side walls of the frame.

At least one of the trusses is at the same time as

Linear guide designed for the winding device. In a further improved embodiment, two or more cross members running parallel to one another are designed as linear guides for the winding device.

In this case, the frame or housing has the

Spooling device on both sides guide bushes, preferably made of a friction-optimized plastic, e.g. PTFE, or metal, such as. B. brass on. These sockets slide on the crossbars and thereby create a linear guide.

The winding device according to the invention comprises a

Guide roller for the suspension element, the guide roller having a circumferential groove, the groove base of which at least as follows wide as the diameter of the suspension element. Then the suspension element rests on the bottom of the groove and is optimally guided by the guide roller and cannot be sideways

dodge. Because the winding device according to the invention is coupled to the drum via the coupling roller, the winding device moves along with the drum. This

The movement of the winding device is coupled to the rotary movements of the drum via the coupling roller. This ensures that the suspension element of the guide roller is always centered, i.e. H. is inserted into the groove of the drum without offset when the suspension element is rolled onto the drum. Even when unwinding the suspension element from the roll, it is ensured that the suspension element is straight and without any offset or mechanical loads

Drum expires. Due to the guide roller, the drum is also protected from side forces caused by the

Suspension means can be introduced into the winch,

relieved.

In a further advantageous embodiment of the invention it is provided that the winding device has a hold-down roller. This hold-down roller engages in the groove of the guide roller. Between the outer diameter of the

Hold-down roller and the bottom of the groove in the

There is enough space for the guide role

suspension means to be wound up. The interlocking guide roller and hold-down roller prevent the suspension element from accidentally "jumping out" of the guide roller. The winding device according to the invention ensures an ideal alignment of the suspension element relative to the groove of the drum even under adverse operating conditions. This is very precise and gentle on the suspension element

Guaranteed winding of the suspension element on the drum. This applies regardless of the working position and orientation of the winch.

In an advantageous development, the coupling roller has two collars. Both frets engage in the groove of the drum.

The axial distance between the collars is as great as the pitch of the helical groove. It can also be an integral multiple of the pitch of the helical groove. This will make the coupling between

Spooling device and drum improved again.

It is also possible for the two collars of the coupling roller to be formed at the two ends of the coupling roller and for the suspension element to be wound or unwound to run through the two collars. Then a fret cannot engage in the groove of the drum, but rolls on a web between two adjacent turns of the groove.

In a simplified embodiment, the functions of the coupling roller and the guide roller are integrated in one role. This means that the coupling roller is axially spaced from the at least one collar and has a groove in which the suspension element is guided. This results in a more compact and cheaper construction. The suspension element can be an electrical cable, in particular with a tension cord, or a rope. It can

Steel ropes or ropes made of aramid or other fibers are used.

In an advantageous further development, the winch has a rotation angle sensor and / or which is coupled to the drum

Limit switch on. The limit switches ensure that the suspension element is not unwound too far from the drum. Then it could happen that the

Weight forces acting on the suspension element overload the attachment of the suspension element to the drum. As a rule, it is provided that the angle of wrap of the suspension element around the drum is not less than 360 °. It is preferably equal to or greater than 720 °. The tensile forces to be introduced into the drum by the suspension element are then via the

Transferring frictional engagement between the wound suspension element and the drum and not via a mechanical one

Clamp with which the suspension element is usually mechanically connected inside the drum. The mechanical one

Clamping piece is helpful when assembling the winch and provides one when the winch is in operation

redundant securing of the suspension element.

A limit switch is also required in the other end position, ie when the drum is full. It should ensure that the end of the suspension element is not drawn into the winch. In particular if there is a hook or a load, such as for example, at the end of the suspension element If a luminaire is attached, pulling this end too far into the winch would damage the winch and / or the hook / load. The structural details of the transmission of electrical power and / or electrical signals from the frame of the winch to the drum or to the one on the drum

attached electrical cables (e.g. via

Slip ring contacts) are not the subject of the invention; they are known to the person skilled in the art and are therefore not explained in the.

Further advantages and advantageous embodiments of the invention are shown in the following drawing, in which

Description and claims can be found. All of the features disclosed in the drawing, its description and the patent claims can be essential to the invention both individually and in any combination.

Show it:

FIG. 1 shows the isometric view of a winch according to the invention from the drive side;

Figure 2 shows a second isometric view of the invention

Winch;

FIG. 3 shows a side view of the winch with the drive; FIG. 4 shows the winch according to the invention with one removed

Side wall;

Figure 5 is an isometric view of the

winding device according to the invention; Figures 6 to 8 further detailed views of the winding device according to the invention;

Figure 9 is a front view of the drum, the

Linear guide and the winding device;

FIG. 10 shows a pressure roller for the suspension element in the groove of the drum; and

Figures 11 and 12 exploded views of the

winch according to the invention.

Description of the embodiment

The winch shown in the figures concerns a

Exemplary embodiment in different views. In some cases, not all components of the winch are shown in order to improve clarity.

For example, one of the two is shown in FIG

Side walls not shown, so you can see the drum, its storage and a rotation angle sensor and its

Can clearly see the coupling with the drum via a toothed belt.

The same reference symbols are used for the same components. The construction of the winch according to the invention, and in particular of its winding device, can be clearly seen from the synopsis of FIGS. 1 to 9.

In FIG. 1, a winch 1 according to the invention is shown in isometric view. The winch 1 according to the invention comprises a frame 3, which consists of side walls 5 and several cross members 7. The crossbars 7 simultaneously serve as spacers for the side walls 5. One or more of the crossbars can also form the linear guide for a winding device according to the invention (not visible in FIG. 1). The traverses 7 are in this

Embodiment rods made of round material, which have an internal thread at their ends. In the side walls 5 there are through openings at the corresponding points. Through these through openings, screws are screwed into the internal threads of the crossbars. In this way, the cross members 7 and the side walls 5 are braced to form a stable frame 3.

In FIG. 1, not all cross members 7 are included

Provided with reference numerals. A drum 9 is rotatably mounted between the side walls 5. In FIG. 1, about half of the drum 9 is covered with a suspension element 11. In FIG. 1, the support means 11 is wound onto the left half of the drum 9. The right half of the drum 9 is shown without support means. The support means 11 can be an electrical cable, the electrical power and

Signals to a load at a lower end of the

Suspension means 11 can be attached, transfers. No load is shown in FIG. A lanyard 13 to which the load can be attached is, however

shown.

At the upper end of the frame 3, a clamp 15 is closed

detect. With the help of this terminal 15 can winch according to the invention on a support tube 17 (not part of the winch) are clamped. Of course, the winch 1 can also be attached to an attachment point in other ways.

A drive 19 is located on the right-hand side in FIG

shown. It includes an electric motor and a reduction gear that is self-locking

Worm gear can be formed. A first rotation angle sensor 23 can be integrated into the drive 19, which in this exemplary embodiment is designed as a geared motor. A limit switch 24 can be attached to one or both side walls 5. The limit switch (s) 24 prevents the suspension element from being unwound too far from the drum 9 or from being wound too far onto the drum 9.

In Figure 2, the winch 1 is in a slightly different way

Perspective shown. The drive 19 is in this

View on the left side of the frame 3 can be seen. A winding device 21 according to the invention can be seen in this view. The details of this winding device 21 are explained in detail in FIGS. 5 to 10. A control device 25 is attached to the side of the winch 1 opposite the drive 19.

FIG. 3 shows a side view of the winch 1 with the drive 19. In FIG. 4, the winch according to the invention is shown partially "cut open". So one side wall 5 and the drive 10 have been removed.

In this view, the traverses 7 can be clearly seen.

Also the screws that go into the internal threads on the

The end face of the crossbars 7 are screwed in to connect the side wall 5, not shown, to the crossbars 7, can be clearly seen. 4th

Another rotation angle sensor 27 can be seen in this view. This further rotation angle sensor 27 is coupled to the drum 7 via a toothed belt drive 29. As a result, every rotational movement of the drum 7 is over the first

Rotation angle sensor 23 and the second rotation angle sensor 27 detected redundantly. The function of a limit switch can also be determined from the signals from these sensors 23 and 27

realize. This means that when the drum reaches a first and a second end position, the

Drive 19 is switched off. This will take effect

this prevents the suspension element 11 from being unwound too far from the drum 7 or the suspension element 11 from being wound too far onto the drum. Then there would be a crash of the lug 13 (see Figure 1) with the frame 3 or the winding device 21. That must be reliable

be prevented. The limit switches are used for this.

Limit switches or buttons 24 can also be on the side walls

5 and respond when the

Winding device in the vicinity of one of the side walls 5 got. A limit switch or limit switch 24 is visible in FIG. 4, which prevents both the excessive winding and the excessive unwinding of the suspension element 11 from or onto the drum 9. When the limit switch 24 is triggered, the drive 19 is stopped.

In FIG. 1, the limit switch or button 24 is then arranged on the left side wall 5, which prevents the suspension element 11 from unwinding too far. In the figure 1, the limit switch or button is then arranged on the right side wall 5, which prevents the support means 11 from being wound up too far and consequently the

Anhangeöse 13 is retracted.

In FIG. 5, the drum 9, the support means 11 and two cross members 7 which carry the winding device 21 are shown. The two side walls 31 of the winding device 21 can be seen clearly in FIG. The winding device 21 is guided on two cross members 7. The winding device 21 comprises two side walls 31, between which various spacers are arranged. These spacers cannot be clearly seen in FIG. You serve

at the same time as a bearing pin for the various roles of the winding device. Furthermore, a guide roller 33 can be seen in FIG. The suspension element is guided out or drawn in from the winch via the guide roller 33.

The guide roller 33 and its design can be clearly seen in FIGS. 6 and 7. As can be seen from Figures 6 and 7, in the guide roller 33 is a circumferential groove 35 available. The groove 35 serves to guide the suspension element. A groove base 37 is adapted to the diameter D of the suspension element with regard to its width and ideally also with regard to its profile.

In the illustrated embodiment, this is

Suspension means a cable with a circular cross-section and the diameter D. As a result, the groove base 37 is designed as a radius, the radius being approximately equal to 0.5 times that

Diameter D is.

The groove 35 is very much deeper than the diameter D of the suspension element 11, so that the suspension element is guided laterally by the side walls of the groove 35. This already effectively prevents the suspension element 11 from jumping out of the groove 35.

In addition, another role, namely the

Hold-down roller 39 can be integrated into the winding device 21 in order to prevent the suspension element from jumping out of the groove 35 even more effectively. The hold-down roller 39 is arranged in such a way that its collar engages in the groove 35, so that the support means 11 rests on the inside of the groove base 37 in the radial direction and is guided radially outward through the collar of the hold-down roll 39.

The support means is held laterally by the flanks of the groove 35. The shape of the hold-down roller 39 can be seen in FIG. It has two lateral bevels, the angle of which corresponds to the flank angle of the groove 35. FIG. 8 shows the interaction of the groove 35 and the collar of the hold-down roller 39, which is inserted into the groove 35

intervenes, easy to recognize. It follows from the

Side view of Figure 8 and Figure 9 that the

Support means 11 is guided very well in the groove 35 of the guide roller 33 and the hold-down roller 39.

As can be seen clearly from FIGS. 6, 7, 8 and 9, a coupling roller 41 is arranged between the side walls 31 of the winding device in the immediate vicinity of the drum 7. The coupling roller 41 is between the

Side walls 31 of the winding device 21 arranged and rotatably mounted. The coupling roller 41 has this

Embodiment two collars 43 on. The collars 43 are profiled in such a way that they fit into the groove 45 of the drum 9

intervention. This means that by rotating the

Drum 9 the winder 21 in the axial direction, i. is moved to the right or to the left in FIG. This axial movement is forcibly / desmodromically coupled to the rotary movement of the drum 9 and depends on the pitch of the helical groove 45 in the drum 9. The winding device 21 is arranged such that the support means 11 is held and guided in the guide roller 33 in such a way that it is guided directly into the groove 45 of the drum 9 when it is wound up. The suspension element 11 is wound up by rotating the drum accordingly. The unwinding of the suspension element 11 takes place in the same way, only with a different / opposite

Direction of rotation of the drum 9. It can be clearly seen from FIG. 9 that the support means 11 is wound up in the groove 45 on the left side of the drum 9. The right half of the drum 9 is free. Guide roller 33, hold-down roller 39 and coupling roller 41 are arranged between the side walls 31 of the winding device 21 and are rotatably mounted.

A section of the winch 1 according to the invention is shown in FIG. It shows the side walls 5, the

Drum 9, the suspension element 11 and the winding device 21.

In this embodiment is between

Side walls 5 and parallel to the drum 9 a rotatable pressure roller 47 is arranged. It holds the suspension element 11 in the groove 45 of the drum 9.

In a simpler variant, the distance is the

Axes of rotation of drum 9 and pressure roller 47 fixed

given.

In the further improved variant shown in FIG. 10, the pressure roller 47 is pressed resiliently against the drum 9 or the support means 11 wound on it.

For this purpose 5 brackets 49 are provided on both side walls. The consoles 49 each carry a bearing 51 for the

Pressure roller 47. The bearings 51, in turn, are resiliently attached to the consoles 49, so that they always press the pressure roller 47 against the drum 9 or the support means 11 wound thereon. The structural details of the resilient mounting are not shown in FIG. 10; rather, two arrows show the direction in which the Pressure roller 47 is pressed against drum 9. These arrows are directed to the axis of rotation of the drum 9.

With both variants it is advantageous if the

The (cylindrical) contact surface of the pressure roller 47 consists of a flexible material. The pressure roller 47 represents a further structural measure through which

the suspension element 11 is prevented from jumping out of the groove 45.

In FIGS. 11 and 12, the winch according to the invention is shown in two different ways for illustration

Exploded views (without reference symbols) shown. The device according to the invention is characterized by a very simple winding device which ensures an exact feeding of the suspension element into the groove 45 of the drum 9 under all circumstances. The inventive

The winding device 21 has a simple structure, but is nevertheless very reliable and very quiet. It can be advantageous to manufacture the collars 43 of the coupling roller 41 from a plastic in order to minimize the running noise.

The same applies to the hold-down roller and the guide roller 33. The drum 9 can be provided with a covering made of plastic in the groove 45

is incorporated. Disruptive operating noises will then also be generated on the drum 45 side

effectively prevented.

Claims

1. Winch comprising a drum (9), a support means (11), a winding device (21) and a frame (3), the frame (3) having a bearing for the drum (9) and a linear guide for the winding device (21 ), the drum (9) having a helical groove (45) and the winder (21) having a

Has coupling roller (41), and wherein the coupling roller (41) has at least one collar (43) which engages in the helical groove (45) of the drum (9).

2. Winch according to claim 1, characterized in that the frame (3) comprises two side walls (5) that the

Drum (9) is rotatably mounted on the side walls (5), and that a plurality of cross members (7) are arranged between the side walls (5).

3. Winch according to claim 2, characterized in that at least one of the cross members (7) is designed as a linear guide for the winding device (21).

4. Winch according to one of the preceding claims, characterized in that the coupling roller (41) has a groove (35).

5. Winch according to one of claims 1 to 3, characterized in that the winding device (21) has a guide roller (33) for the support means (11), and that the guide roller (33) has a groove (35).

6. Winch according to one of claims 4 or 5, characterized in that a groove base (37) of the groove (35) as wide as or wider than a diameter (D) of the

Suspension means (11).

7. Winch according to one of the preceding claims, characterized in that the winding device (21) has a hold-down roller (39), and that the hold-down roller (39) engages in the groove (35) of the guide roller (33).

8. Winch according to one of the preceding claims, characterized in that the winding device (21) has two side walls (31) and several spacers.

9. Winch according to claim 8, characterized in that the spacer or spacers serve as bearing bolts for the coupling roller (41), the guide roller (33) and / or the hold-down roller (39).

10. Winch according to one of the preceding claims, characterized in that the pitch of the helical groove (45) is greater than or equal to a diameter (D) of the suspension element (11).

11. Winch according to one of the preceding claims, characterized in that the coupling roller (41) has two collars (43) which engage in the helical groove (45) of the drum (9), and that an axial one Distance (S) of the collars (43) is equal to the pitch of the helical groove (45).

12. Winch according to one of the preceding claims, characterized in that the support means (11) is an electrical cable, in particular with a tension cord, or a rope.

13. Winch according to one of the preceding claims, characterized in that it has a drive (19),

in particular an electric drive for which

Has drum (9).

14. Winch according to one of the preceding claims, characterized in that it has at least one rotation angle sensor (23, 27) coupled to the drum (9).

15. Winch according to one of the preceding claims, characterized in that it has one or more

Has limit switch (24).

16. Winch according to one of the preceding claims, characterized in that it has a pressure roller (47), that the axes of rotation of the pressure roller (47) and drum (9) run parallel to one another, and that a contact surface of the pressure roller (47) the drum ( 9) touches and / or presses the support means (11) wound on the drum (9) into the groove (45) of the drum (9).

17. Winch according to claim 16, characterized in that the pressure roller (47) is resiliently mounted, and that the resilient mounting is the contact surface of the

The pressure roller (47) presses against the drum (9) and / or the support means (11) wound on the drum (9).

18. Winch according to one of the preceding claims, characterized in that it has a control device (25) for controlling the drive (19) and for evaluating the rotation angle sensor or sensors (23, 27) and / or the limit switch (s) (24) having transmitted signals.