EP1660707A1

EP1660707A1 - Opening roller for an open-end spinning device

Info

Publication number: EP1660707A1
Application number: EP04736394A
Authority: EP
Inventors: Heinz-Georg Wassenhoven
Original assignee: Saurer GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2003-08-23
Filing date: 2004-06-09
Publication date: 2006-05-31
Anticipated expiration: 2024-06-09
Also published as: WO2005121421A1; US7257938B2; EP1660707B1; US20060123766A1; DE502004004760D1

Abstract

The invention relates to an opening roller for an open-end spinning device of a textile machine that, via a rear bearing shaft, can be fixed in a bearing bracket of an opening roller housing in a manner that enables it to be easily detached, and has a single motor drive provided in the form of an external rotor. The invention provides that a contact track device (18) is placed in the area of the bearing shaft (17) of the opening roller (12) and corresponds with contact shoes or pins (21) that are connected to a power supply (27) of the associated textile machine.

Description

Description:

Opening roller for an open-end spinning device

The invention relates to an opening roller for an open-end spinning device according to the preamble of claim 1.

In connection with oven-end spinning devices, for example of rotor spinning machines, opening rollers in various embodiments are known.

In DE 35 43 428 AI, for example, an opening roller is described which has a rear bearing shaft and is mounted with this bearing shaft in the bearing bracket of an opening roller housing. The end of the bearing shaft has a so-called drive whorl, which is acted upon by a machine-long tangential belt and is connected to the base body of the opening roller via a shaft.

A so-called clothing ring is interchangeably fixed on the rotatably mounted base body of the opening roller. To change the clothing ring, the opening roller can be folded down from the tangential belt and then removed from the front of the opening roller housing.

Furthermore, for example from DE 40 36 017 AI or DE 100 54 697 AI also opening rollers are known which are driven by a single motor.

That means the drives designed as external rotors

Opening rollers are fixed with their stator to the opening roller housing and connected to the power supply of the textile machine via electric lines.

A clothing ring is also interchangeably arranged on the rotor of this external rotor. A disadvantage of these single-motor-driven opening rollers, however, is that the drive of the opening roller must also be removed in order to change the clothing ring, and electrical lines or corresponding plug connections must be disconnected. These plug connections must then be carefully reassembled when the opening roller is reinstalled. The installation and removal of such opening rollers is therefore relatively cumbersome and time-consuming.

Finally, in DE 196 50 597 AI an open end

Spinning device described, the opening roller with your

Bearing shaft is mounted in the bearing bracket of an opening roller housing and one designed as an external rotor

Has single drive.

On the bearing shaft of this opening roller, a whorl is arranged at the end, which can be acted upon by a braking element.

The known opening roller is fixed in the bearing bracket by a spring wire which engages in an annular groove in its bearing shaft.

Furthermore, there is a locking and unlocking device which can be actuated by a toggle arranged in front of the opening roller housing, which is connected via a shaft to the rear shifting gate.

That means, by means of the toggle, shift gates which have different buttons can be rotated in such a way that the brake is pressed onto the whorl and at the same time the

Power supply to the opening roller drive is interrupted.

In a further switching position, the locking of the

Bearing shaft of the opening roller loosened in the bearing console and the brake released again. Even with this known opening roller, when removing and installing the opening roller, as described above, plug contacts must first be loosened laboriously and time-consuming and later re-assembled.

Starting from the aforementioned prior art, the invention has for its object to provide an opening roller which is driven by a single motor, but can be easily and safely installed and removed from its bearing bracket on the opening roller housing, for example for changing its clothing ring.

This object is achieved according to the invention by an opening roller which has features as described in the characterizing part of claim 1.

Advantageous embodiments of the invention are described in the subclaims.

The formation of an opening roller according to the invention with a contact track device in the area of its bearing shaft, which corresponds to contact shoes or pins, has the particular advantage that, even though an opening roller driven by a single motor is used, the opening roller is removed, for example in connection with the replacement of the trim ring is necessary, no electrical plug contacts or the like must be loosened and reassembled during the subsequent installation. Rather, the contact track device according to the invention ensures that the drive of the opening roller can easily be decoupled from the energy supply of the textile machine in question when it is removed, and can also be easily recoupled during installation. As set out in claim 2, the contact track device in an advantageous embodiment has a plurality of galvanically isolated

Traces of contact.

Because of the majority of the galvanically separated

Contact traces are possible in connection with corresponding contact shoes or pins, via the

Contact track device both electrical energy to the

Transfer drive as well as transmit signals from the control electronics to the drive (claim 5).

As described in claim 3, the

Contact track device advantageously in the region of the free end of the bearing shaft of the opening roller

Contact zone in which the contact tracks are annular.

This means that the contact traces include the stock of the

Opening roller completely in the area of the contact zone.

In conjunction with corresponding, stationary contact shoes or pins, such a design ensures that, regardless of the respective angular position of the

Opening roller, after its installation always a correct one

Contact between the contact shoes or pins and the

Contact traces guaranteed and thus a secure energy and signal supply is ensured.

As set out in claim 4, is also provided in a preferred embodiment, the

Arrange contact track device in or on a plastic body, which can be fixed, for example, by a clip connection on the bearing shaft of the opening roller. The relatively sensitive contact track device is largely protected against external mechanical influences. According to claim 6 it is further provided that the contact track device in the installed state of the opening roller protrudes into a contact shoe housing that the

Contact traces correspond to the corresponding contact shoes or pins and thus ensure a reliable power and signal supply to the opening roller drive.

As stated in claim 7, it is easily possible, if necessary, to transfer the contact shoe housing by a simple radial displacement from a first operating position in which the contact shoes or pins are in engagement with the associated contact tracks to a second operating position in which the Contact shoes or pins are out of engagement with the associated contact tracks and thus the drive of the opening roller is switched off. This means that the opening roller can be operated properly in the first operating position, while in the second operating position the opening roller can be easily removed from the front of the opening roller housing and replaced, for example, by a new or an overhauled opening roller, for example provided with a new clothing ring ,

In the course of installing and removing the opening roller, no electrical plug contacts or the like have to be loosened and put together again.

The design according to claims 6 and 7 consequently not only ensures that there is always a secure electrical connection to the opening roller drive during the spinning operation, but also ensures that if necessary Drive of the opening roller is reliably separated from the energy supply.

In an advantageous embodiment, the contact shoe housing, as described in claim 8, is fixed to a spring element, preferably a leaf spring.

The spring element rests with a preload on a rotatably mounted switching structure that has several buttons of different heights.

That is, by simply pivoting the switching contour, the contact shoe housing can radially to the bearing shaft of the

Opening roller and thus be shifted to the associated contact tracks.

As set out in claims 9 and 10, the switching contour can advantageously be actuated via a toggle which is arranged in the region of the opening roller housing in an easily accessible manner. The easy accessibility of the toggle enables the operating personnel to set the desired operating position of the contact shoe housing easily and quickly. Since a fixing element of a locking and unlocking device is also controlled via the switching contour in addition to the contact shoe housing, a problem-free, completely uncomplicated exchange of the opening roller is possible if required.

The locking and unlocking device preferably has a bar spring as the fixing element, which in a first operating position is spring-loaded into a locking ring fixed on the bearing shaft of the opening roller (claim 11). The rod spring not only secures the bearing shaft of the opening roller against displacement due to mechanical loading in the axial direction, but also prevents the bearing shaft from rotating under the influence of the torque of the opening roller drive.

In order to prevent the locking and unlocking device of the opening roller from being accidentally released or the contact shoe housing from being inadvertently shifted into the above-described second operating position during spinning operation, the open-end spinning device has a stationary stop (claim 12).

When the spinning device is closed, this stationary stop covers the leaf spring resting on the switching contour and carrying the contact shoe housing. This means that the stationary stop prevents the toggle from pivoting and thus the contact shoe housing and the fixing element from being able to be brought into an operating position in which correct operation of the opening roller is no longer guaranteed. The stationary stop also prevents the spinning device from being closed when the switching contour is in an operating position in which neither the contact shoes rest on the contact tracks nor the locking and unlocking device locks the bearing shaft of the opening roller.

As described in claim 13, the

Contact track device can be made, for example, from a conductor foil, which is preferably fixed on a plastic support body after punching out. The plastic body is then fixed to the bearing shaft of the opening roller by means of a suitable connection mechanism, for example via a clip connection. This means that the support body equipped with a conductor foil is reliably connected to the bearing shaft of the opening roller via the clip connection and a corresponding abutment.

The invention is explained in more detail below with reference to an embodiment shown in the drawings.

It shows:

1: shows schematically an open-end spinning device with an opening roller that can be driven by a single motor and whose energy supply has a decoupling contact track device,

2: a single-motor driven, in a bearing bracket of an opening roller housing opening roller with a contact track device and a pivoted contact shoe housing on a larger scale, partly in section,

3: the contact shoe housing surrounding the contact track device of the opening roller according to viewing direction arrow X of FIG. 1, in a first operating position,

4: the contact shoe housing according to Figure 3, in a second operating position,

5: a single-motor driven opening roller with a contact track device in detail, 6: a contact track device, for example produced by means of a conductor film, before it is attached to the bearing shaft of the opening roller.

FIG. 1 shows one of the numerous open-end spinning devices 1 of an open-end rotor spinning machine. Such open-end spinning devices 1 are known in principle and are described in relatively detail, for example in DE 196 50 597 AI.

As is known, such open-end spinning devices 1 have a spinning rotor 2, the rotor cup 4 of which during the

Spinning at high speed in a rotor housing 5 rotates.

The rotor housing 5, which is closed at the front by a cover element 8 during the spinning operation, is via a

Pneumatic line 6 connected to a vacuum source 7, which provides the vacuum required for spinning in the rotor housing 5.

The spinning rotor 2 is electromotive

Individual drive 3, which is connected, for example, via electrical lines 20 to the energy supply 27 of the textile machine in question, can be driven in a defined manner.

For this purpose, the electromagnetic single drive 3 is additionally connected to associated control electronics 23 via at least one signal line 24.

The cover element 8, which closes the rotor housing 5 during the spinning operation, is rotatably supported to a limited extent about a pivot axis 16, so that the stationary spinning rotor 4 is accessible when required. At the level of the spinning rotor 2, a so-called channel plate adapter 9 is also interchangeably inserted in the cover element 8, to which a thread take-off tube 10 is connected.

Furthermore, the cover element 8, as usual, has an opening roller housing 11, in which an opening roller 12 rotates, which is fixed with its bearing shaft 17 in a rear bearing bracket 14 of the opening roller housing 11 and is thereby secured by a locking and unlocking device 26.

The locking and unlocking device 26 consists of a spring element 32, preferably a bar spring, which springs into a locking ring 33 arranged on the bearing shaft 17 of the opening roller 12.

As can be seen in particular from FIGS. 2 and 5, the

Opening roller 12 by an electromotive

Single drive 28, which is designed as an external rotor, is driven and has an easily detachable coupling to one

Energy and signaling device 27 of the open-end

Rotor spinning machine in the end region of its bearing shaft 17 a

Contact track device 18.

The contact track device 18 consists of several galvanically isolated contact tracks 19, which are in the end region of the

Bearing shaft 17 are annular.

The annular contact tracks 19 correspond in the area of a contact zone 52 with current-carrying contact shoes or pins 21, which are connected to the energy and

Signal device 27 of the open-end rotor spinning machine or via a signal line 22 are connected to a control device.

The contact shoes 21 are protected in one

Contact shoe housing 50 arranged, which, as will be described later explained, radially to the bearing shaft 17 of the opening roller 12 is slidably mounted.

That is, the contact shoe housing 50, as can be seen in particular from FIGS. 3 and 4, is fixed with limited movement on the housing of a drive 36 of the sliver feed cylinder 13 via a spring element 35, preferably a leaf spring.

Both the leaf spring 35 carrying the contact shoe housing 50 and that as the fixing element of the connecting and

Unlocking device 26 serving rod spring 32 abut buttons 30A to 30D of a switching contour 29 which can be pivoted in a defined manner by a toggle 31 arranged in the area of the opening roller housing 11. This means that either a first operating position A (spinning mode) or a second operating position B (assembly setting) can be defined by the knob 31.

As further indicated in FIG. 1, a stationary stop 34 is also provided on the open-end spinning device 1, which overlaps the spring element 35 when the spinning device is closed and thereby prevents the switching contour 29 from operating position A into operating position B by means of toggle 31 can be switched.

The ones shown in Figures 2 and 5 approximately on the original scale

The opening roller 12 has both fixed and rotatable ones

Components.

The fixed components include the bearing shaft 17 with the contact track device 18 and the stator winding 39 of the opening roller drive 28.

The base body 40 of the opening roller 12, with its at the

Internally arranged permanent magnets 41 the rotor of the Opening roller drive 28 forms is rotatably supported on bearing shaft 17 of opening roller 12 via roller bearings 44 or 45.

As is known, an exchangeable clothing ring 42 is arranged on the base body 41 and is secured by a so-called flanged disc 43.

As shown in FIG. 2, the rear region of the fixed bearing shaft 17, the annular one, projects

Has contact tracks 19, in a bore 51 of a likewise non-rotatably mounted

Contact shoe housing 50.

On the annular contact tracks 19 are in the

Operating position A arranged in the contact shoe housing 50

Contact shoes or pins 21, which in turn on

Electric lines 25 to the power supply 27 of the

Textile machine and a (not shown)

Control device are connected.

The bore 51 of the contact shoe housing 50 is designed so that a radial displacement of the

Contact shoe housing 50 with respect to the bearing shaft 17 of the

Opening roller 12 is possible.

As already indicated above and in particular can be seen from FIGS. 3 and 4, the contact shoe housing 50 is fixed by means of screw bolts 38 to a spring element, preferably a leaf spring 35, which in turn is fastened to the housing of the drive 36 for the fiber ribbon feed cylinder 13 by means of screw bolts 37.

The free end of the leaf spring 35, which is angled twice in the exemplary embodiment, lies on a switching contour 29 which is switched between a first operating position A (spinning operation) and a second by means of a toggle 31 Operating position B (mounting position) can be set. On the switching contour 29, which has four buttons 30A, 30B, 30C and 30D, which are each at different distances from the axis of rotation 46 of the switching contour 29, there is also a bar spring 32 of the locking and unlocking device 26, which via a locking ring 33 supports the bearing shaft 17 of the opening roller 12 fixed in the bearing bracket 14.

As indicated in FIG. 6, the contact track device 18 essentially consists of a plastic support body 48, on or in which the galvanically separated contact tracks 19 are arranged, which are made, for example, of a conductor foil. The contact tracks 19 are ring-shaped in the area of the contact zone 52 and correspond in this area to corresponding contact shoes or pins 21 in the contact shoe housing 50 (see FIG. 2).

On the side opposite the contact zone 52, the contact tracks 19 end in plug contacts 46, which engage in corresponding receptacles 47 in the stator winding 39 of the opening roller drive 28.

As indicated above, the contact tracks 19 of the contact track device 18 are made, for example, from a gold-plated conductor foil, which is attached to the support body 48 after punching out, for example by gluing.

Function of the facility:

During the spinning operation, the rotor housing 5 which is subjected to negative pressure is firmly closed by the cover element 8 and is locked in such a way that it cannot be opened unintentionally.

The leaf spring 35, which carries the contact shoe housing 50, is positioned under a stationary stop 34 in such a way that the toggle 31 cannot be pivoted. During the spinning operation, the thread produced in the open-end spinning device 1 is over the

Thread take-off tube 10 is withdrawn and continuously monitored by a sensor device (not shown). If a thread breakage occurs, which is immediately detected by the sensor device, the sensor device ensures that the rotating functional members of the open-end spinning device 1 are immediately braked or switched off.

This means that the drive 3 of the spinning rotor 2 and the drive 28 of the opening roller 12 are acted upon by a braking current and braked to a standstill, and the drive 36 for the sliver feed cylinder is also de-energized. The open-end spinning device 1 can only be opened when the spinning rotor 4 is almost at a standstill. This means that the cover element 8 can only be folded down about the pivot axis 16 when the spinning elements are stationary.

As already indicated above, the toggle 31, via which the contact shoe housing 50 and the locking and unlocking device 26 can be pivoted, is in a first operating position A during the spinning operation (Figure 3), in which the leaf spring 35 on the

Button 30A of the switching contour 29 supports and

Bar spring 32 of the locking and unlocking device 26 on the

Support surface 30C is present.

In the operating position A, the contact shoe housing 50 is raised so far that the contact shoes 21 are securely attached to the annular contact tracks 19 in the end region of the

Bearing shaft 17 of the opening roller 12 and thus the

Transmission of electrical energy and / or

Enable control signals to the drive 28 of the opening roller 12.

Furthermore, in the operating position A, the bar spring 32 is in a locking ring 33 on the bearing shaft 17

Opening roller 12 is compressed and thus locks the

Opening roller 12 in the bearing bracket 14.

When the spinning device is opened, i.e. when the cover element 8 is folded down about the pivot axis 16, the leaf spring 35 is removed from the effective range of the stop 34, so that the toggle 31 can now be moved from the operating position A to the operating position B (FIG. 4).

The leaf spring 35 comes to rest on the button 30B of the switching contour 29, which is at a smaller distance from the axis of rotation of the switching contour 29 than the button 30A.

The leaf spring 35 and thus also the contact shoe housing 50 are lowered so far that the contact shoes 21 out of engagement with the contact tracks 19

Contact track device 18 come on bearing shaft 17 of the opening roller 12. When the toggle 31 and thus the switching contour 29 are pivoted, the button 30D is simultaneously pivoted under the bar spring 32.

Since the distance of the button 30D from the axis of rotation of the

Switching contour 29 is greater than the distance of the

Button 30C, the bar spring 32 is pressed down and slides out of the recess on the bearing shaft 17

Opening roller 12 fixed locking ring 33rd

The opening roller 12 can now easily from the front

Opening roller housing 11 removed and replaced by a new or a repaired opening roller 12, for example provided with a new clothing ring 42.

The installation of the new or repaired opening roller 12 is just as simple as the above-described removal of the opening roller 12, it only takes place in the reverse order.

Claims

claims:

1. Opening roller for an open-end spinning device of a textile machine, which can be easily detachably fixed with a rear bearing shaft in a bearing bracket of a opening roller housing and has a single-motor drive designed as an external rotor, characterized in that in the area of the bearing shaft (17) the opening roller (12) a contact track device (18) is arranged which corresponds to contact shoes or pins (21) which are connected to an energy supply (27) of an associated textile machine.

2. opening roller according to claim 1, characterized in that the contact track device (18) has a plurality of galvanically isolated contact tracks (19).

3. opening roller according to claim 1, characterized in that the contact track device (18), preferably in the region of the free end of the bearing shaft (17) of the opening roller (12) arranged contact zone (20) in which the contact tracks (19) arranged in a ring are.

4. opening roller according to claim 1, characterized in that the contact track device (18) on or in a plastic body (48) is arranged.

5. opening roller according to claim 1, characterized in that the contact track device (18) in connection with the contact shoes or pins (21) is designed both for the transmission of electrical drive energy and for the transmission of control signals.

6. opening roller according to claim 2, characterized in that the contact track device (18) in the installed state of the opening roller (12) protrudes into a contact shoe housing (50) in such a way that the contact tracks (19) correspond to contact shoes or pins (21), which are arranged protected within the contact shoe housing (50).

7. opening roller according to claim 6, characterized in that the contact shoe housing (50) with respect to the bearing shaft (17) of the opening roller (12) is mounted radially displaceable and from a first operating position (A) in which the contact shoes or pins (21 ) are in contact with the contact tracks (19),. can be transferred into a second operating position (B), in which the contact shoes or pins (21) are out of contact with the contact tracks (19).

8. opening roller according to claim 6, characterized in that the contact shoe housing (50) on a, preferably designed as a leaf spring element (35) is fixed, which bears with bias on a rotatably mounted switching contour (29) which has several, different high buttons ( 30A, 30B, 30C, 30D).

9. opening roller according to claim 8, characterized in that in the region of the opening roller housing (11) a toggle (31) is arranged, which enables a pivoting of the switching contour (29) from the operating position (A) into an operating position (B) in which the contact shoes or pins (21) are lifted off the contact tracks (19) and a fixing element (32) of a locking and unlocking device (26) is out of engagement with a locking ring (33) on the bearing shaft (17) of the opening roller (12) ,

10. opening roller according to claim 8, characterized in that the switching contour (29) is designed such that the contact shoe housing (50) and the fixing element (32) can be displaced by corresponding buttons (30A, 30C; 30B, 30D).

11. opening roller according to claim 10, characterized in that the fixing element (32) of the locking and unlocking device (26) is designed as a bar spring, which in the operating position (A) in the locking ring (33) on the bearing shaft (17) of the opening roller ( 12) lies and the opening roller (12) in the bearing bracket (14) both axially fixed, as well as securing against rotation.

12. Opening roller according to claim 8, characterized in that the open-end spinning device (1) has a stationary stop (34) which, when the spinning device is closed, comprises the spring element (35) which rests on the switching contour (29) and carries the contact shoe housing (50) and prevents the toggle (31) from being pivoted from the operating position (A) to the operating position (B) when the spinning device is closed.

13. A method for producing an opening roller according to claim 1, characterized in that firstly a conductor film having the contact tracks (19) is produced, which is then fixed on a support body preferably made of plastic.