DD301296A7 - Strand guiding device, in particular for braiding machines - Google Patents

Abstract

The invention relates to a strand guiding device, in particular for braiding machines for forming strand-like braids or for braiding a strand-like material (eg electrical cables). According to the invention the object is achieved in that within the circumference of the wheel bearing on the Radständer a hollow crank loop axis for receiving a crank eccentric to the center of the wheel bearing is arranged, while wearing the Planetenkegelzahnradkranz near its outer diameter a crank pin which is in communication with the crank loop. By means of the solution according to the invention, a progressive, uniform crossing of the strands "below 2 over 2" and thus the production of a uniform mesh with increased mechanical strength is achieved

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to a strand guiding device, in particular for braiding machines for forming strand-like braids (eg cables) or for braiding strand-like material (eg hoses, cables) with a group of external supply spools in a circular arrangement on a rotatable support disk, which surround a fixed hollow shaft in a first direction rotates, with a group of inner supply spools in a circular arrangement, on which a support disc arranged on the drive sprocket for performing a rotational movement of the inner supply spools against the outer supply spools along a fixed spool ring on the hollow shaft acts, the strands of the outer supply spools in the formed by the circular path of the inner supply spools in and out to achieve the intertwining of the inner and outer strands with each other or around a soul.

Characteristic of the known state of the art There are known braiding machines that work according to the so-called Maypole principle. In these machines, the supply spools with their Flechtgutvorrat (wire or textile), with their carrier and Drive elements and the Strangzugkraftregler so around a machine axis on curvilinear guide ways together

led past that the strands taken off from the supply spools to a central braiding point experience a regular crossing and a braid, z. B. "less than 2 over 2" train.

This "Maypole principle" has the disadvantages that large masses are moved on curvilinear paths and these during the Guide course also occupy different distances to the machine axis. In addition, the delivery spools

including the said functional elements are mounted on one side and have corresponding top-heaviness.

This results during the Spulenumlaufs u. a. swelling centrifugal forces and periodically different distances

the strand guidance organs to the central braiding point.

As a result, strong vibrations occur on the machine structure, and the functional elements become high

claimed.

In addition, the constant distance changes cause considerable despite strand length storage Traction differences between the individual strands (see brochures from Mayer-Rothkopf / USA and Babcock / GB). Furthermore, a round braiding machine according to DE-PS 2743893 is known. This machine works with circular encircling Supply spools, wherein the inner and outer supply spools rotate in the opposite direction. The crossing of the strands is effected by strand guiding devices in the vicinity of the outer supply spools

the base of pivotable guide arms are arranged by means of coupling gear, which rotate with the outer supply spools, while the outer strands in the circular track of the inner supply spools in and out.

This machine has the disadvantages that for straight guidance of the Führungsarmspitze a large number of axes, joints

and Umlenktrolleji be required and by the superimposed panning and longitudinal displacement of the entire

Strand guiding arm larger Zugspannungsunterschiede be brought into the strands. In addition, the strand guide arms must periodically change the pivoting direction, whereby in the plurality of Umsteuerelemente per guide arm (coupling, intermediate lever, joints, strand guide arm with pulley) considerable Mass forces, 'component stresses and machine vibrations occur. Furthermore, a braiding machine is known which operates according to the so-called outer wheel principle (see brochure of the company. VEB Schnallflechter Berlin). This machine is equipped with two rows of circular circulating supply spools. The inner coil row is on one

annular track guided around the machine axis and driven by bevel gears.

The outer coil row rotates at the same speed in the opposite direction to the inner coil row. The strands of the outer coil row are opposed by each outer supply spool, around the machine axis

guided around the inner coil row and rolling on a fixed sprocket Kegolzahnräder such that describe by the rolling of the wheels on the sprocket and by the attached at the edges of Ktgulzahnräder eyelets the strands a cycloid-shaped path.

This machine has the fundamental disadvantage that no uniform mesh "below 2 over 2" can be achieved,

but only uneven braids "below 1 over 2".

The reason is that in the uncorrected simple epicycloids in the lower position of the strand guide eyelet the Residence time (haste) in the cycloidal loop is sufficient only for the crossing of an inner supply spool, while in the upper one Arc course of the epicycloids the strand guide loop can cross two inner supply spools. The uneven braids bring strength loss for the braided Good, which is particularly true of pressure hoses

plays a role.

So this machine can not be used for high and high pressure hoses, but only for products with lower Strength requirements. Object of the invention

The aim of the invention is to improve, by simple means, the usability characteristics of the manufactured wovens by increasing the mechanical strength, to increase the working productivity of the machines and to improve the health protection for the operating personnel by lowering the noise level of the machines.

Explanation of the essence of the invention The invention has for its object, a strand guiding device for a braiding machine with a uniform Braiding (eg, "below 2 over 2") to create, which for the realization of the generic weaving of the strands

performs rotational drive and strand guiding movements, wherein the components for guiding the strands of the outer supply spools have to perform any reversing movements, are subjected to a low load and wear, and develop a lower noise level.

According to the invention, the object is achieved in that the strand guiding device within the circumference of the wheel bearing

on the wheel stand has a hollow crank loop axis for receiving a crank bow eccentric to the center of the wheel bearing. The rotatably mounted on the wheel bearing Planetenkegelzahnradkranz near his

Outer diameter of a crank pin, which communicates with the crank loop. At the end of the crankshaft is located

a strand guide member which forms a strand guide lever together with the crank loop.

The strand guidance of the braided material takes place from the arranged on the wheel stand outer supply spool over several Deflection rollers through the crank hollow shaft via deflecting elements through the strand guide member to the central Braiding. The connection between crank pin and crank grinding is done by a arranged at the free end of the crank pin Roller, which engages in a slot in the crank loop. Another way of connecting between crank pin and crank loop is that a at the free end of the Engaged crank pin sliding block engages in a slot in the crank loop. With the aid of the inventive solution by using Rotary drive and strand guiding movements at Elimination of reverse movements due to higher working speeds increases work productivity, lowers noise levels, Wear and tear and the mechanical strength of the wattiness products such as bursting pressure and dynamic Pulse strength increased by achieving uniform braid formation "below 2 over 2". This uniform weave weave "below 2 over 2" is achieved by the planetary bevel gear rim with the thereto

mounted crank pin rotates at a uniform angular velocity, while the crank loop and the

Strand guide lever due to eccentricity e move at uneven angular velocity. In the inwardly directed position at the greatest distance a 'of the crank pin, the tip of the strand guide lever has the

In the path of a looped epicycloid, its dwell is increased when it is dipped into the slots, allowing at least one strand of the inner supply spools to travel over the submerged strand in excess.

-3- 301 296 Embodiment The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings show

Flg. 1: a transmission diagram of a braiding machine with the strand guiding device according to the invention; FIG. 2: a schematic representation of the guide paths of the outer strands through the inventive strand guiding device;

Strand guiding device and the inner supply spools for crossing the inner and outer strands. Figure 3: is a schematic view of the braiding machine shown in Figure 1 with the relative arrangements of the attached thereto

inner and outer supply spools Fig. 4: a fragmentary view of the weave binding "below 2 over 2" of a means according to the invention

Strand guiding device manufactured product. As can be seen in Fig. 1, the braiding machine 10 has a hollow shaft 11, through which a hose 12 o. Ä. During the Umflechtens pulled by a pulling device. The hollow axle 111st is fixedly mounted in a housing 13 and carries a

rotatable support plate 14 and a stationary coil track ring 15th

The support plate 14 is driven via a countershaft by a gear pair z4 / z 5. On the disc 14 are the outer Delivery spools are firmly attached to (A 1 .. .A12) and rotate clockwise with them. Adjacent to the rotatable support plate 14 is the fixed coil track ring 15, the inner Lieforspulen In

(11 ... 112) on its circular path around the hollow axis 11 leads.

The inner supply spools are driven by the bevel gear Z1 fastened to the support disk 14, via the Coil track ring 15 gelagerto InnenradboUen 1 β with bevel gears Z 2 and toothed segments Z3, which in turn with the

inner carriage 17 and coil carriers 18 are firmly connected.

The inner feed reels run in at the same speed as the outer reels Only in opposite Direction, ie counterclockwise. The strands of the inner supply spools to be interlaced are essentially directly from the supply spool via guide rollers

fed to the bobbin support 18 to the braiding point 19 at an angle α.

The strands coming from the additional supply spools have to move during the relative movement to the inner supply spools

the area enclosed by the circular path of the inner supply spools periodically in and be led out. to

Realization of this braiding crossover, the inner supply spools must be fundamentally passable on all sides and

at least in a straight line from the outer strands can be crossed freely, and for the inward and outward control movement corresponding strand guiding devices 20 must be present.

The passability of the inner supply spools is achieved in that between the individual supply spools In including the

respective bobbin 18 and toothed segments Z3 with carriage 17 a constant distance is maintained that the

Coil track ring 15 in the spaces between the Innenradbolzen 16 slots 21 at regular intervals to Dipping the outer strands and that the gears Z2, the toothed segments Z3 with bobbin 18 and

Inner supply spools Passed in fluent on the circular path, whereby always at least one gear Z2 with the respective

Gear segment Z3 is engaged. The strand guiding device 20 consists of a support disk 14, on the outer circumference of a plurality Radständer 22nd

are arranged, each wheel stand 22 has a wheel bearing 23 for receiving a rotatable Planetenkegelzahnradkranzes 8 and within the circumference of the wheel bearing 23 a hollow crank grinding shaft 25 for receiving a crank loop 24th

In this case, the distance between the center line of the wheel bearing 23 from the center line of the crank hollow hollow shaft 25 as eccentricity e

designated.

The planetary bevel gear Z8 carries near its outer diameter a crank pin 26, at its free end

a roller 27 is arranged, which is located in the slot of the crank loop 24. The crank loop 24 has at its end

Strand guide member 28 and together with this the strand guide lever 29th During circulation of the driven by gear Z4 support plate 14 with the outer supply spools An and the Radständern 22nd

whose Pianetenkegelzahnräder Z8 roll on the fixed sun gear Z7 in a certain

Gear ratio and move it over the respective crank pin with roller 27 in the slot of the crank loop 24th

the strand guide lever 29 from an outwardly directed position to an inwardly directed position and vice versa again from inward to outward position.

Planet bevel gear Z8 and crank pin 26 run at a uniform angular velocity, while Crank loop 24 and strand guide lever 29 due to the eccentricity e with uneven angular velocity

move. In the outwardly directed position of the strand guide lever 29, the crank pin 26 has the smallest distance a to the crank hollow shaft 25 and the strand guide lever 29 consequently the largest angular velocity, while in the inwardly directed position of the strand guide lever 29, the largest distance a 'of the crank pin 26 to

Crankcase hollow shaft 25 is present and the strand guide lever 29 analog has the Kle 'ι angular velocity. In this case, the strand guidance of the wicking material is carried out by the on the wheel stand 22 on note outer supply coil to about

one or more pulleys through the crank loop hollow axis 25 via a od <ehrere deflection by the

Strand guiding element 28 to the central braiding point 19. The tip of the strand guide lever 29 with the strand guide member 28 describes the way a looped Epicycloids, as shown in FIG. 2. The guide path time behavior of the strand guide of the outer strands in cooperation with the orbital movement of

inner supply spools and their strands becomes clear from this.

In the horizontal scale are from 0 to 30, the partial steps of the outer supply spools or by analogy, the counter-rotating Sub-steps of the inner supply coils dagestellt, wherein 24 substeps mean a crossing period "less than 2 over 2". On the looped epicycloids the sub-steps 0 'to 25' of the strand guide member 28 are applied, these Sub-steps are associated with the sub-steps of the supply spools, d.ii., Sub-step 2 'of the strand guide member 28 is

at the same time as sub-step 2 of the outer supply spool A1 and sub-step 18 to 16 of the inner one

Supply spool 11. Accordingly, the strand of A1 is positioned by its strand guide member 28 after β substeps at 6 ',

while 11 was moved from substep position 18 to 12, thus crossing the strand of A1. After a further 12 steps, the strand of A1 after execution of the loop 6 'to 18' assumes the position 18 'and 12 was the

Sub-step position 12 moves, whereby the strand of A1 were crossed for the second time. A-if the following 6 sub-steps, the strand of A1 reaches position 24 'and 13 sub-step position 18, bringing the strand of A1

the first time were crossed.

The second subcrossing experiences the strand of A1 after further β substeps, when it reaches the position 30 '(corresponds to the Pos. 6'

analogous to a crossover period) has reached and I4 then takes the sub-step position 24.

The continuous course of all inner supply spools In and outer supply spools An in the manner described causes

progressive uniform crossover of the strands "below 2 over 2" and enables the production of a uniform mesh.

3 shows schematically the relative arrangement and direction of rotation of the inner and outer coils from the braiding point 19

seen.

The result of uniformly covering the inner and outer strands "below 2 over 2" is fragmentary in FIG

shown.

Claims (3)

A strand guiding apparatus, in particular for braiding machines for forming stranded braids with inner and outer oppositely moving supply spools for braiding the inner and outer strands of force-guided gear driven elements with a support disc on the outer periphery of which a plurality of 'wheel stands are arranged, each at each Radständer a wheel bearing for receiving a rotatable Planetenkegelzahnradkranzes is arranged, characterized in that within the circumference of the wheel bearing (23) on the Radständer (22) a crank hollow shaft (25) for receiving a crank loop (24) arranged eccentrically to the center of the wheel bearing (23) is, with the planetary gear ring (Z8) near its outer diameter a crank pin (26), which communicates with the crank loop (24) having at its end a strand guide member (28), which together with the crank loop (2 4) forms a strand guide lever (29). 2. strand guiding device according to claim 1, characterized in that the connection between the crank pin (26) and crank loop (24) by a at the free end of the crank pin (26) arranged roller (27) which engages in a slot in the crank loop (24) , he follows. 3. strand guiding device according to claim 1, characterized in that the connection between the crank pin (26) and crank loop (24) by a at the free end of the crank pin (26) arranged sliding block which engages in a slot in the crank loop (24) takes place.