CN110800072B - Winding wire harness using tape - Google Patents

Abstract

A winding device (1) for winding a wire harness (L) with a tape (K) has: a winding head (2) which is movable in a motor-driven manner along the line bundle (L) in a winding direction (R) and has a recess (6) for the line bundle (L) and a holding device (5) for the strip coil (W) which is rotatable about the recess (6) in a motor-driven manner; and counter-holding means (8, 9) configured for exerting a reaction force against a pulling force exerted by the tape roll (W) on the wiring harness (L) via the tape (K). A method for winding a wire strand (L) with a strip (K) by means of a winding head (2) of a winding device (1), wherein the wire strand (L) is fixed, the wire strand (L) is introduced into a recess (6) of the winding head (2), the winding head is moved along the wire strand (L), and a radial tensile force exerted on the wire strand by the strip (K) during winding is at least partially resisted by means of a counter-holding device (8, 9).

Description

Winding wire harness using tape

Technical Field

The invention relates to a winding device for winding, in particular mechanically winding, a wire harness with a strip. The invention also relates to a method for winding a wire harness with a tape. The invention can be applied in particular to twisted wire harnesses, in particular for motor vehicles.

Background

In order to mechanically wind the wire harness, the tape roll has heretofore been moved radially around the wire harness at a given interval. In this case, a pulling force of the tape roll is generated, which deflects the wire harness from the center in the direction of the tape roll. This deflection causes uneven winding effort.

DE 102013015442 a1 discloses a winding head drive for a winding machine for wrapping or strapping elongated objects, such as cables and cable harnesses, with a tape from a transport device, wherein the winding head drive has a stator and a substantially hollow-cylindrical rotor, wherein the rotor has an inner diameter, wherein the rotor is arranged within a substantially cylindrical inner space of the stator, and wherein the stator has electromagnetically excitable coils and means for supporting the rotor.

Disclosure of Invention

The task of the invention is that: the disadvantages of the prior art are at least partially overcome and, in particular, a possibility is provided for winding a wire harness with a tape, in particular an adhesive tape, wherein the wire harness is less deflected during winding.

The object is achieved according to the features of the independent claims. Preferred embodiments can be derived in particular from the dependent claims.

The object is achieved by a winding device for winding a wire harness with a strip and a device configured to apply a counterforce ("counter-holding device") which counteracts a pulling force applied to the wire harness by the strip coil via the strip, wherein the winding device has a motor-driven winding head which is movable along the wire harness in the winding direction and which has a recess for threading the wire harness and a holding device for the strip coil which is rotatable about the recess in a motor-driven manner.

Such a winding device yields the following advantages: the radial displacement of the wire harness due to the pulling force of the strip acting on the wire harness can be kept small by the counter-holding device. This can improve the quality of winding (winding result) and effectively prevent damage of the wire harness with a simple device.

The strip may be an adhesive tape, a film tape, or the like.

The winding head effects a rotation of the tape roll around the wire harness. The winding head is displaceable along the wire harness by means of a linear guide.

The wrapping may also be referred to as wrapping, binding, or bundling. The winding device may also be referred to as a winding apparatus or a winding machine.

One extension is: the counter-holding device is fixed on or forms part of the winding head and is thus displaced together with the longitudinal displacement of the winding head. Alternatively, the counter-holding device can be a separate component of the winding device, which component can be moved together with the winding head or independently of the winding head.

The counter holding device can be non-rotatable on the winding head or fixed statically on it or rotatable around the wire harness.

The winding device may further have a harness fixing device for fixing the wire harness on one or both sides, a wire tensioning device for axially tensioning the wire harness, a tape placing device for automatically placing a tape on the wire harness, a tape cutting device for automatically cutting the tape, and the like.

The wire harness may also be referred to as a bundle or cable and has one or more individual, cabled, stranded, or dedicated wires. The strands may be twisted or untwisted. The wiring harness is particularly used for motor vehicles.

One configuration scheme is as follows: the counter-hold device has at least one guide fork and the strand is designed to be guided between two tines of the at least one guide fork.

The guide fork(s) is/are advantageously used for guiding, in particular centering, the wire harness. The guide fork can hold a section of the wire harness, on which the strip is wound or on which the strip is applied or wound (angleifen), without further accessories. This provides structural space for additional functions, such as automated strip placement and strip cutting. In addition, the guide fork has only a small contact surface with the wire harness, so that only a slight frictional force is transmitted to the wire harness by the guide fork. This in turn helps prevent twisting of the wire harness. The use of the guide fork(s) furthermore enables: particularly uniform and precisely repeating winding processes.

One extension is: at least one guide fork is statically fixed on the winding head.

A further embodiment is that: the counter-holding device has two guide prongs arranged parallel to one another and the strip is designed to be wound or added (ansetzen) on a section of the wire strand located between the two guide prongs. The following advantages result: the lateral displacement of the wire harness caused by the pulling force of the strap can be kept particularly small and, in addition, the inclined position of the wire harness can be prevented particularly effectively. Furthermore, the wire harness can be inserted particularly easily into the guide fork.

The other configuration scheme is as follows: such that at least one guide fork is an open guide fork. This is achieved: particularly simple, low maintenance and inexpensive winding devices.

An alternative or additional embodiment is: at least one guide fork is a closable guide fork. This yields the following advantages: in the case of a closed guide fork, the wire harness extending therein is guided or constrained in all radial directions. The closable guide fork may also be referred to as a clamp.

Still another embodiment is that: the counter-holding device has a pin oriented parallel to the wire harness and statically placed on the winding head. The pin is arranged in a space designed for the wiring harness, for example, axially inserted into the wiring harness. The pin is aligned with its free tip opposite to the winding direction of the winding head. The strip is designed in particular for wrapping or applying on the section of the wire bundle having the pin. The pin thus moves along with the winding head along the wire bundle ("sync pin"). The pin is thus continuously pulled axially out of the wrapped bundle or bundle by the forward movement of the winding head. The pin forms a stable "core" around which the wires of the bundle can be placed and advantageously allows the "core" to absorb the pulling forces of the strip upon winding. The wire harness thus acquires its own stability with respect to the pulling force of the tape roll or strip. The following advantages also result: the tensioned harness can (but need not) be abandoned.

The pin may be used with or without other counter-holding means, such as guide forks, tensioned cords, etc.

The pin may be a thin, smooth rod in order to keep the adhesion, adherence etc. of the strip small.

A further embodiment is that: the pin is provided with a narrowing (for example conical) tip at its free end which is introduced into the wire harness. This further facilitates the pulling out from the bundle or bundle. However, in principle, other cross-sectional shapes for the pin can also be used, for example a spherical tip.

There is also an advantageous embodiment for easy pull-out: the strip is designed to be entangled or added on a section of the wire bundle having only the tip of the pin.

There is also an advantageous embodiment for easy pull-out: the pins extend only into the portion of the section over which the strip is wrapped or applied.

Alternatively or additionally, the pin is extended by the entire section on which the strip is wound and, if necessary, even beyond said entire section, so that the pin is wrapped together in a particularly secure manner and thus provides a particularly high stability with respect to the pulling force of the strip coil.

In addition, one configuration is: the pin has a surface with reduced adhesion at least in the region of its tip. This allows a particularly simple axial pulling out of the pin from the wire harness. The reduced adhesion surface may be achieved by a non-stick coating of the pin, for example by a teflon coating.

In addition, one configuration is: the counter hold device has a rope tensioning device which provides a tensioned rope extending in the wire bundle. This yields the following advantages: the wire harness is stabilized by the tensioned cord without introducing additional forces on the wires and the contact members. The cord constitutes a taut and thus stable "core" around which the wires of the strand can be placed and which is made to absorb the laterally acting pulling forces that occur upon winding. Thus, the risk of quality loss of the winding of the strip is reduced and the risk of damage to the wiring harness is also reduced. This configuration can also be considered as: by means of which additional tensioned cords or strands are also added during the winding process. The rope remains in the bundle as a "lost core" (verlorene Seele). The cord may also be denoted as a wire.

The rope tensioning device can also be at least partially statically fixed on the winding head.

The rope tensioning device may be used with or without other counter-holding devices, such as guide forks, pins, etc.

There is also a configuration: the cord tensioning device has a pre-tensioned dispensing roller for dispensing the cord, which is movable together with the winding head and which is arranged in the winding direction before a section of the strand on which the strip is wound or applied. This results in a particularly compact and reliable design. The cord tensioner of the dispensing roller keeps the cord taut at all times. Thereby obtaining the required stability of the wire harness.

One extension is: the dispensing roller is fixed, in particular in a stationary manner, on the winding head. Alternatively, the dispensing roller may be a separate component from the winding head.

There is also a configuration: the dispensing roller has a rope tensioner with an adjustable tensioning force. Thereby advantageously changing the tension in the rope. The tensioning force can be varied, for example, by adjusting the pretension of the spring.

The cord may be centrally placed on the harness fixture at the beginning of the winding section and dispensed from the spool at the desired tension during winding.

There is also a configuration: the winding device has a wire tensioning device for tensioning the wire bundle in its longitudinal direction (axial direction). The tensioning of the wire harness yields the following advantages: it is thereby stabilized and also stabilized against torsion. This is particularly advantageous in the case of a bundle with (single) wires or litz wires that are not twisted. If a wire tensioning device is present, it can in one embodiment also assume the function of a wire harness fastening device. Alternatively, the wire tensioning device and the harness fixation device may be different parts of the winding device.

There is also a configuration: the winding device can be operated automatically by means of a control device.

One other configuration is: so that the winding device is adapted to the robot etc., in particular may form part of the robot.

The object is also achieved by a method for winding a wire harness with a strip by means of a winding head of a winding device, wherein: the wire harness is fastened, for example, to a harness fastening device, the wire harness is inserted into a recess of a winding head, the winding head is moved away from the fastened position in a motor-driven manner in the winding direction along the wire harness, the wire harness is wound with a tape in at least one predefined section in such a way that a tape roll connected to the winding head is guided in a motor-driven manner around the wire harness, the tape rests against the wire harness, and a radial tension applied to the wire harness by the tape during winding is at least partially resisted by means of a counter-holding device.

The method can be constructed similarly to the winding device and yields the same advantages.

Drawings

The above described features, characteristics and advantages of the present invention, as well as the manner and method of how it is accomplished, will become clearer and more clearly understood in connection with the following schematic description of an embodiment, which is further set forth in connection with the accompanying drawings. Wherein:

fig. 1 shows a segment of a winding device according to a first embodiment in an oblique view;

fig. 2 shows a segment of a winding device according to a second embodiment in an oblique view; and

fig. 3 shows a segment of a winding device according to a third embodiment in an oblique view.

Detailed Description

Fig. 1 shows a section of a winding device 1 with a winding head 2 in an oblique view. The winding head 2 has a slider 3 which transitions into an open, annular or C-shaped holding region 4. In the holding region 4, a rotating member 5 having an inner C-shape is rotatably supported, for example, by a rotating flange. As indicated by the arrow D, the rotary part 5 is rotatable in a motor-driven manner relative to the holding region 4, for example in a manner controlled by a control device (not shown).

As indicated by the arrow E, the wire bundle L comprising a plurality of wires or litz wires can be introduced into the central recess 6 of the rotary part 5 and thus also into the central recess of the winding head 2, and rather through the holding region 4 and the opening of the rotary part 5 by lateral threading. The wire harness L is arranged in particular such that the rotary part 5 can rotate in the circumferential direction about its longitudinal extent. In other words, the rotation vector of the rotating member 5 extends along the longitudinal extension of the wire harness L.

The carriage 3 is movable in a motor-driven manner along the longitudinal extent of the wire strand L in the direction indicated by the associated arrow ("winding direction" R). The movement of the slide 3 can be controlled by means of a control device.

On the rotating part 5, a tape roll W is or can be arranged, which contains the tape K or such a roll corresponding to the tape K. The adhesive tape roll W thus serves as a rotatable holding device for the adhesive tape K. The roll W is in a plane inclined to the rotation plane of the rotating member 5 and therefore also to the line L.

For winding or bundling, in particular, the untwisted wire bundle L, the wire bundle L is fixed at a rear position with respect to the winding direction R on a stationary wire bundle fixing device 7 (see fig. 3) of the winding device 1, for example, manually. The wire harness L is then introduced into the central recess 6 of the rotary part 5 and fixed in a forward position on a further stationary harness fixing device (not shown). The wire harness L may be tensioned here, but need not be tensioned. The tape K from the roll W is then fixed or applied, for example manually or automatically, on the thread bundle L.

At the beginning of the winding process, the winding head 2 is in the vicinity of the wire harness fixing device 7. Next, the winding head 2 is moved in the winding direction R. Here, the tape roll W is rotated around the wire harness L. Thereby, the wire harness L is wound by the tape K, which is unwound from the tape roll W here. The slope of winding is determined by the ratio of the moving speed of the slider 3 and the winding speed of the rotating member 5. By the inclined position of the roll W of tape: the winding does not cause wrinkling. During the winding process, a pulling force is exerted on the thread bundle L by the adhesive tape K between the thread bundle L and the tape roll W, wherein the pulling force pulls the thread bundle L radially from its direction of extension and specifically in the direction of the tape roll W.

On the slide 3, before and after the provided section S of the thread bundle L, there are a front ("guide") fork 8 and a rear ("guide") fork 9, each having two tines, on which section S the adhesive tape K wound off from the adhesive tape roll W is wound or applied. The strand L extends between the two tines. The guide forks 8 and 9 serve as stoppers for radial deflection or displacement with respect to the wire harness L. At least outside its lateral opening 10, it thus generates a reaction force to the radial tensile force generated by the adhesive tape K. The guide forks 8 and 9 thus form counter-holding means against this pulling force.

In order to provide the reaction force radially over all, the guide prongs 8 and/or 9 can alternatively be designed as a closable clamp. The guide forks 8, 9 can also be regarded as guide means. Said guide forks 8, 9 also advantageously cause: the wire harness L does not need to be tensioned or only needs to be weakly tensioned for winding. However, the longitudinal tension of the wire harness L yields the following advantages: the twisting of the wires of the wire harness L is resisted.

In a further variant, it is also possible for only one of the two guide forks 8, 9 to be present.

In general, the wire strand L can be wound with the adhesive tape K completely or only in sections by means of the winding device 1. In particular, it is also possible to wind a plurality of sections. The winding device 1 can have further components for this purpose, for example a separating device for separating adhesive tape or the like.

Fig. 2 shows a section of a winding device 11 according to a second embodiment in an oblique view. The winding device 11 is configured similarly to the winding device 1, however, a counter-holding device in the form of a pin 13 is now additionally present on the winding head 12 on the front guide fork 8. The pin 13 is configured in the form of a thin rod, which is oriented along the longitudinal extension of the wire bundle L and has a free end pointing opposite to the winding direction R ("backwards"). This pin 13 is guided along with the movement of the slide 3 and can therefore also be referred to as a "synchronized (mitlaufend)" pin 13.

The pin 13 is introduced into and/or inserted into and at least partially into the thread bundle L, in particular with its tip in a section S of the thread bundle L, on which section S the adhesive tape K wound off from the adhesive tape roll W is wound. Thereby, the pin 13 is wound there together with the wires of the wiring harness L. By moving the slider 3, however, the pins 13 are increasingly guided together in the winding direction R ("axial") and continuously slide out of the previously wound section.

In order to prevent the adhesive tape K from possibly exerting a significant adhesive force on the pin 13 and thus from sliding linearly out of the wire bundle L, the pin 13 may be provided, at least in the region of its tip, with a non-stick coating, for example with a teflon coating. Additionally or alternatively, the tip of the pin 13 may be narrowed, for example conical or frustoconical. Additionally or alternatively, the pin 13 may in one variant extend only via a part, for example only one third, of the section S of the line bundle L.

The pin 13 absorbs the radial pulling force generated by the adhesive tape K and prevents or thereby inhibits lateral displacement of the wire harness L. The pin 13 thus forms a stable "core" around which the wires of the bundle L are placed and which advantageously absorbs the radial pulling forces upon winding.

In a further variant, the pin 13 can extend over and, if necessary, even beyond the entire section S of the line bundle L. The pin 13 may be inserted into the wiring harness L manually or automatically prior to the winding process.

In general, the pin 13 may be provided together with the guide forks 8 and 9, alternatively only with one of the guide forks 8 or 9, or even without one of the guide forks 8 and 9. In the latter case, the pin 13 may be held by a simple holding means, for example by a simple arm.

Fig. 3 shows a segment of a winding device 21 according to a third embodiment in an oblique view. The winding device 21 is configured similarly to the winding device 1 or 11, but now has a dispensing roller 22 or a fastening device for the dispensing roller 22. The dispensing roller 22 can be fixed on the winding head 23 or, as shown, can be moved in a motor-driven manner parallel to the winding head 23 on a separate carriage 24. The slides 3 and 24 can be moved by means of a common linear drive or can be moved individually.

The distribution roller 22 distributes the cord H deflected into the wire harness L via the cord guide 25. The cord H is fixed with its end to the wire harness L on the wire harness fixing device 7 and functions like an additional strand of the wire harness L.

The dispensing roller 22 has a cord tensioner so that the cord H is tensioned during the entire winding process. Thereby allowing the wire harness L to obtain its stability and to resist the pulling force radially applied by the adhesive tape K. The cord H thus constitutes a stable "core" around which the wires of the bundle L are placed and which absorbs the radial pulling forces at winding. The tension of the rope tensioner may be variable or adjustable.

In general, the dispensing roller 22 may be provided with the guide forks 8 and 9, alternatively with only one of the guide forks 8 or 9 or even without the guide forks 8 and 9.

With the winding process finished, the cord H is separated and may remain in the strand L as a "lost core".

Of course, the invention is not limited to the embodiments shown.

List of reference numerals

1 winding device

2 winding head

3 sliding block

4 holding area

5 rotating part

6 voids

7 wire harness fixing device

8 leading guide fork

9 rear guide fork

10 side opening

11 winding device

12 winding head

13 Pin

21 winding device

22 distribution roller

23 winding head

24 sliding block

25 rope guiding device

D arrow

E arrow head

H rope

K adhesive tape

L-shaped wire harness

R winding direction

Section of S wire harness

W-shaped adhesive tape roll

Claims (10)

1. A winding device (1; 11; 21) for winding a wire harness (L) with a strip (K), the winding device having:

-a winding head (2; 12; 23) movable in a motor-driven manner along the wire harness (L) in a winding direction (R), the winding head having a gap (6) for threading the wire harness (L) and a holding device (5) for a strip coil (W) rotatable in a motor-driven manner around the gap (6); and

-counter-holding means (8, 9; 13; 22, 24, 25, H) configured for exerting a reaction force resisting a pulling force exerted by the tape roll (W) on the wiring harness (L) via the tape (K),

-wherein the counter-holding means (8; 9; 13; 22, 24, 25, H) have at least two guide forks (8, 9), and

-at least two guide forks (8, 9) arranged parallel to each other are designed for guiding the wire bundle (L) between two tines of the at least two guide forks (8, 9), respectively, and

-the strip (K) is designed to be wound on a section of the wire harness (L) between the two guide forks (8, 9),

-wherein at least one of the at least two guide forks (8, 9) is an open guide fork, and

-at least one of said at least two guide forks (8, 9) being a closable guide fork (8, 9).

2. The winding device (11) according to claim 1, wherein:

the counter-holding device (8, 9; 13; 22, 24, 25, H) has a pin (13) oriented parallel to the strand (L) and fixedly arranged on the winding head (12),

-the pin (13) is arranged in a space designed for the wiring harness (L),

-the pin (13) is aligned with its free tip opposite to the winding direction (R) of the winding head (12), and

-the strip (K) is designed to be wound on a section of the wiring harness (L) having the pin (13).

3. Winding device (11) according to claim 2, wherein

-the pin (13) has a tapered tip, and

-the strip (K) is designed to be wound on a section of the wiring harness (L) having only the tip.

4. Winding device (11) according to one of claims 2 to 3, wherein the pin (13) has a surface with reduced adhesion at least in the region of its tip.

5. Winding device (21) according to claim 1, wherein

-the counter-hold device (8, 9; 13; 22, 24, 25, H) has a rope tensioning device (22, 24, 25), wherein the rope tensioning device provides a tensioned rope (H) extending in the wiring harness (L).

6. Winding device (21) according to claim 5, wherein

-the rope tensioning device (22, 24, 25) has a pre-tensioned dispensing roller (22) for dispensing the rope (H) movable with the winding head (23), and

-the distribution roller (22) is arranged in the winding direction (R) before the section of the wiring harness (L) on which the strip (K) is wound.

7. Winding device (21) according to claim 6, wherein the dispensing roller (22) has a rope tensioner, wherein the rope tensioner has an adjustable tensioning force.

8. A winding device (1; 11; 21) according to claim 1, wherein the winding device has a wire tensioning device for tensioning the wire harness (L) in its own longitudinal direction.

9. Winding device (1; 11; 21) according to claim 1, wherein the winding device can be operated automatically by means of a control device.

10. A method for winding a wire bundle (L) with a strip (K) by means of a winding head (2; 12; 23) of a winding device (1; 11; 21), wherein:

-the wire harness (L) is fixed at a harness fixing device (7),

-the wiring harness (L) is introduced into the interspace (6) of the winding head (2; 12; 23),

the winding head (2; 12; 23) is moved along the wire harness (L) in a motor-driven manner in a winding direction (R) away from a fixed position,

the thread bundle (L) is wound with the strip (K) in at least one predetermined section (S) in such a way that a strip coil (W) connected to the winding head (2; 12; 23) is guided in a motor-driven manner around the thread bundle (L), while the strip (K) lies against the thread bundle (L), and

-at least partially counteracting a radial pulling force exerted by the strip (K) on the wire bundle (L) during the winding by means of a counter-hold device (8, 9; 13; 22, 24, 25, H) having at least two guide prongs (8, 9) arranged parallel to each other,

-wherein the wiring harness (L) is guided between two tines of the at least two guide forks (8, 9), respectively, and

-the strip (K) is wound on a section of the wiring harness (L) between the two guide forks (8, 9),

-wherein at least one of the at least two guide forks (8, 9) is an open guide fork, and

-at least one of said at least two guide forks (8, 9) being a closable guide fork (8, 9).

Images