WO2022002488A1

WO2022002488A1 - Gear unit for a combing machine and combing machine comprising a gear unit

Info

Publication number: WO2022002488A1
Application number: PCT/EP2021/063997
Authority: WO
Inventors: Dirk Meier
Original assignee: TRüTZSCHLER GMBH & CO. KG
Priority date: 2020-06-30
Filing date: 2021-05-26
Publication date: 2022-01-06
Also published as: EP4172391A1; CN115803486A; DE102020117233A1

Abstract

The invention relates to a gear unit (1) of a combing machine for spinning preparation, comprising: a main drive shaft (10) which can be driven by a drive motor (27) via a main drive wheel (11); a nipper shaft (12) which can be made to move in an oscillating back and forth rotational movement by a four-bar linkage (13) connected to the main drive wheel (11); a coupling linkage (14) which is connected to the nipper shaft (12) in such a way that the coupling linkage (14) can be moved in an oscillating rotating manner by the nipper shaft (12); a detaching cylinder gearing (16) which is designed for driving at least one detaching cylinder (17, 18), and wherein the detaching cylinder gearing (16) can be continuously driven off via the main drive shaft (10), and wherein the oscillating movement can be introduced into the detaching cylinder gearing (16) by means of the coupling linkage (14) and can be superimposed upon the continuous driving by means of the main drive shaft (10) in the detaching cylinder gearing (16), such that a pilgrim-step movement can be performed with an output shaft (19) of the detaching cylinder gearing (16). According to the invention, an control gear unit (20) a control motor (23) are provided, wherein the output shaft (19) of the detaching cylinder gearing (16) is operatively connected to the control gear unit (20) and wherein the control motor (23) is designed for introducing a rotational movement into the control gear unit (20), which rotational movement can be applied to the output shaft (19) of the detaching cylinder gearing (16) by means of the control gear unit (20).

Description

Title: Gear unit for a comber and comber with

Gear unit

The invention relates to a gear unit of a combing machine for spinning preparation according to the preamble of claim 1. In particular, the invention relates to a gear unit having a main drive shaft that can be driven via a main drive wheel by means of a drive motor, a pincer shaft that is connected to a crank arm connected to the main drive wheel an oscillating back and forth rotary movement can be displaced, a coupling rocker which is connected to the tong shaft in such a way that the coupling rocker can be rotated in an oscillating manner by the tong shaft, and wherein the gear unit furthermore has a tear-off cylinder gear which is set up to drive at least one tear-off cylinder, and wherein the tear-off cylinder gear can be continuously driven off via the main drive shaft and wherein the oscillating movement can be introduced into the tear-off cylinder gear by means of the coupling rocker, which the continuous drive by means of the A Main drive shaft can be superimposed in the tear-off cylinder transmission, so that a pilgrim step movement can be carried out with an output shaft of the tear-off cylinder transmission. The invention also relates to a combing machine with a gear unit as described above.

From DE 10 2012 011 030 A1, for example, a gear unit for a combing machine for spinning preparation is known, and the gear unit has, as essential structural components, a main drive shaft that drives a pincer gear, the pincer gear for driving a pincer apparatus with a top gripper and with a Lower jaw is used. Furthermore, the gear unit has a tear-off cylinder gear for driving two tear-off cylinders, which form respective pairs of cylinders with counter-tear cylinders, between which the fiber product to be combed is guided, the tear-off cylinder gear regularly being designed as a planetary gear in a manner known per se.

The main challenge in the design of such a gear unit is the generation of a so-called pilgrim step movement for the tear-off cylinder of the combing machine and the simplest possible influence on the movement curve of the pilgrim step movement. To generate the pilgrim step movement, the planetary gear is permanently driven with a continuous rotary movement via the main drive shaft. This continuous The drive movement is superimposed with a further oscillating movement, which is also introduced into the tear-off cylinder gear by means of a push-joint rod unit, for example via a further component of the planetary gear such as the sun gear, whereby the pilgrim step movement can be generated at a gear output of the planetary gear, which is usually initiated directly into the tear-off cylinder will. The oscillating movement is picked up by the oscillating pincer shaft via the pusher joint rod unit, with the pick-up taking place by means of the coupling rocker and other components, which is energetically favorable since the oscillating pincer shaft is necessary to drive the pincer apparatus anyway. The coupling rocker, which is moved in an oscillating manner via the tong shaft, is accommodated on an eccentric bushing which is rotatably accommodated on the main drive shaft.

The pincer shaft is set in an oscillating back and forth movement by means of a crank arm, the crank arm being connected to the main drive wheel in a circumferential manner, and the main drive wheel is drivingly connected to the main drive shaft, which is ultimately driven by the drive motor.

The tear-off cylinder gear can be designed as a planetary gear, and the tear-off cylinders are driven via a distribution stage, for example from spur gears, equally via the output shaft of the tear-off cylinder gear, whereby the tear-off cylinders execute a fixed predetermined movement curve of the pilgrim step movement, which directly follows the movement curve on the output shaft of the tear-off cylinder gear.

The object of the invention is to develop a gear unit of a combing machine for spinning preparation, wherein the movement curve of the pilgrim step movement based on a gear structure according to the preamble of claim 1 should be able to be influenced in a simple manner. In particular, the influencing should be able to be carried out by means of an electrical control unit. Another object of the invention is to create a combing machine with a gear unit which has been improved in this way.

This object is achieved on the basis of a gear unit according to the preamble of claim 1 and on the basis of a combing machine according to claim 8 with the respective characterizing features. Advantageous further developments of the invention are given in the dependent claims.

The invention includes the technical teaching that an actuating gear unit and a control motor are provided, the output shaft of the tear-off cylinder gear being operatively connected to the actuating gear unit and the control motor for introducing a Rotary movement is set up in the actuating gear unit, which can be superimposed on the output shaft of the tear-off cylinder gear with the actuating gear unit.

The core idea of the invention is the development of the gear unit of a combing head of a combing machine with an actuating gear unit which is operatively connected to a control motor so that the curve of the pilgrim step movement in the tear-off cylinders can be influenced with the electrically actuated control motor, while the curve profile of the basic pilger step movement on the output shaft of the tear-off cylinder transmission can remain unchanged. For example, the angular velocity and angular acceleration of the phase profile of the tear-off cylinder can be changed over the nipple clearance.

An advantage of the inventive arrangement of an actuating gear unit on the output shaft of the tear-off cylinder gear is the ability to retrofit, since the connection of the output shaft to the tear-off cylinders can be released in a simple manner and the actuating gear unit according to the invention can be connected to the output shaft in order to finally connect the tear-off cylinders to the gear output of the actuating gear unit to arrange. The control motor can be designed as a structural unit with the actuating gear unit, and the control motor can be used to initiate a defined rotary movement into the actuating gear unit, similar to the defined oscillating movement that is initiated from the tong shaft via the coupling rocker into the tear-off cylinder gear.

The actuating gear unit is advantageously designed as a planetary gear, which is preferably arranged in the drive train between the tear-off cylinder gear and the tear-off cylinders. The design of the planetary gear forming the setting gear unit can be identical to the design of the tear-off cylinder gear, which can also be designed as a planetary gear.

In particular, after the tear-off cylinder gear, two adjusting gear units according to the invention can be arranged on the output shaft of the tear-off cylinder gear, preferably in the form of a planetary gear, which are equally driven by the output shaft, but have the respective control motors, so that a front and a rear tear-off cylinder can be controlled separately from one another and one to another may have different phase positions. In particular, the setting can be made so that the phase position of the rear tear-off cylinder lags behind the phase position of the front tear-off cylinder, which is made possible by the two control motors on the respective actuating gear units.

According to a further advantageous embodiment of the invention, the output shaft can be operatively connected to a sun gear of the planetary gear unit forming the actuating gear unit. Furthermore, the control motor can be operatively connected to a planetary carrier of the planetary gear that forms the actuating gear unit.

It is also advantageous if the coupling rocker is rotatably mounted on an eccentric bushing, through which the main drive shaft extends and is connected to a circular comb shaft for driving a circular comb roller. The actuating gear unit according to the invention has a set of shafts, the shafts of which extend parallel to the main drive shaft and / or parallel to the circular comb shaft. As a result, the gear unit can be designed to be particularly compact.

It is also conceivable that the tear-off cylinder gear is coupled to the main drive shaft by means of a gear stage and is further coupled to the coupling rocker by means of a push-joint rod unit. In this way, the basic structure of the gear unit can be designed in a manner known per se, and the actuating gear unit according to the invention can easily be retrofitted together with the control motor.

According to a further aspect of the invention, a control unit can be set up with which the control motor can be controlled to execute a continuous or discontinuous, periodic and / or repetitive rotary movement.

The control unit can be formed by an operating unit already present on the combing machine, or the control unit is an integral part of the existing operating unit. Via the control unit, which is designed in particular as an interactive interface, the control motor can be activated, for example, in order to adjust the phase position of the pilgrim step movement of the tear-off cylinder relative to the pilgrim step movement of the output shaft of the tear-off cylinder gear.

The invention is also directed to a combing machine for spinning preparation with a gear unit as described above. The combing machine can have several combing units with respective gear units, wherein the control unit can be set up centrally and can be designed to control all control motors of each gear unit. Of course, the multiple gear units can be adjusted in the same way, in particular with regard to the phase position of the tear rollers, by means of the identical activation of the control motors in each of the combing heads, in particular via uniform operation of a control unit common to all combing heads. Further measures improving the invention are shown in more detail below together with the description of a preferred exemplary embodiment of the invention with reference to the figures.

1 shows a gear unit for a combing machine according to the prior art,

2 shows a view of a gear unit for a combing machine with an actuating gear unit shown as an example together with a control motor,

3 shows a diagram in which the curve of the phase position of the front tear-off roller and the phase position of the rear tear-off roller are plotted over time. First, FIG. 1 is described, which shows a gear unit 1 of a combing machine for spinning preparation, the features described with the associated reference numerals in FIG. 2 also having to be taken into account and not being described again in connection with FIG.

Figures 1 and 2 each show a gear unit 1, the gear unit 1 according to Figure 1 represents a prior art, whereas in Figure 2 the features of the invention are described separately.

The gear unit 1 has a main drive shaft 10 which is driven via a main drive wheel 11 by means of a drive motor 27. The drive motor 27 initially drives a secondary shaft 30, which is part of a secondary gear 31, the secondary gear 31 driving, for example, table calender rolls 32 and, for example, delivery rolls 33.

A gear 34 is mounted on the secondary shaft 30, which meshes with the main drive wheel 11, and the main drive wheel 11 has a rigid connection to the main drive shaft 10, which is consequently also continuously driven in rotation by the drive motor 27. The main drive shaft 10 interacts via an intermediate gear 35 with a circular comb shaft 21, via which a circular comb roller 22 is driven. Furthermore, a gear stage 25 is connected to the main drive shaft 10, via which the tear-off cylinder gear 16 is continuously driven to drive the tear-off cylinders 17 and 18, the tear-off cylinder gear 16 being designed as a planetary gear and driving the tear-off cylinders 17 and 18 directly with the pilgrim's step movement. On the main drive wheel 11, a crank arm 13 is arranged at an eccentric point, via which an oscillating movement is introduced into the tong shaft 12. The oscillating movement is transferred from the tong shaft 12 to a tong apparatus, not shown, in order to move at least one upper tong of the tong apparatus in an oscillating manner relative to a lower tong in order to release the fiber strand between the upper tong and lower tong and to hold it again.

The tong shaft 12 is further connected to the coupling rocker 14 via a coupling arm 36, and the oscillating movement of the tong shaft 12 is introduced into the coupling rocker 14 via the coupling arm 36, which is rigidly attached to the tong shaft 12. The coupling rocker 14 can perform the rotary oscillating movement on an eccentric bushing 15, which is applied to the main drive shaft 10 itself so as to be rotatable.

On an opposite side of the connection of the coupling arm 36, the coupling rocker 14 is connected to the tear-off cylinder gear 16 by means of a push-joint rod unit 26, so that with the oscillating movement of the coupling rocker 14, a discontinuous, but periodic oscillating movement is introduced into the tear-off cylinder gear 16, which results from the continuous rotary movement the main drive shaft 10 and the gear stage 25 superimposed. As a result, the tear-off cylinders 17 and 18 can be driven with the required pilgrim step movement.

Also shown is a brush motor 37 for driving a cleaning brush 38, and a motor 39 is provided which serves at least to drive two winding rollers 40 on which the

Fiber lap is placed.

A coupling rod 28 is set up as a connection between the main drive wheel 11 and the eccentric bush 15. A rotary movement is introduced into the eccentric bushing 15 via the coupling rod 28, which produces a forced rotation of the eccentric bushing 15 as a function of the rotation of the main drive wheel 11.

In comparison to FIG. 1, FIG. 2 shows a transmission unit 1 which is expanded according to the invention and which has an actuating gear unit 20. The actuating gear unit 20 is connected to the output shaft 19 of the tear-off cylinder gear 16 so that a pilgrim step movement is already introduced into the actuating gear unit 20 via the output shaft 19. For this purpose, the output shaft 19 is connected to a sun gear 29 which is part of the tear-off cylinder gear 16 designed as a planetary gear.

If the control motor 23 is at rest, the tear-off cylinders 17 and 18 carry out the pilgrim step movement in the phase position which is also introduced into the actuating gear unit 20 via the output shaft 19. If the control motor 23 is activated, it rotates a planetary carrier 41 of the planetary gear set 20 via a control shaft 42, so that the tear-off cylinders 17 and 18 finally lead or lag behind the phase position P1 of the pilgrim step movement of the output shaft 19, depending on the setting. If the control motor 23 is designed as a servomotor, for example, when the servomotor is activated, the phase position P2 can be generated which deviates from the phase position P1, in particular between the reversal points U1 and U2, as shown in FIG.

In FIG. 3, the time t in ms is plotted on the abscissa for this purpose, over which the tear-off cylinders 17 and 18 execute the rotary movement with the angle α. The latter is plotted on the ordinate. The control motor 24 is activated by means of a control unit 24, in particular by means of a touch-sensitive screen.

If the tear-off cylinders 17, 18 - in contrast to this invention - are each driven and controlled by a servomotor so that the angular speed and angular acceleration of the phase profile of each tear-off cylinder 17, 18 can be controlled separately, this has the disadvantage of high investment costs. In addition, the energy consumption increases because the replica of the pilgrim step movement by the servo motors at speeds of over 500 rpm due to the permanent acceleration and deceleration consume a lot of energy and heat it up. The invention is therefore based on the knowledge that only a small phase deviation caused by an interposed adjusting gear unit 20 with a control motor 23 is sufficient to achieve a phase deviation of up to +/- 10% from the nominal speed of the tear-off cylinders 17, 18. This is because the nominal speed and the energy required by the gear unit 1 or the tear-off cylinder gear 16 are already specified and available, so that only the difference in the movement deviation needs to be introduced into the gear unit 1. The investment costs are significantly lower than when using servomotors. The energy consumption is also significantly lower and the solution according to the invention can be retrofitted.

The embodiment of the invention is not restricted to the preferred exemplary embodiment specified above. Rather, a number of variants are conceivable which make use of the solution shown even in the case of fundamentally different designs. All of the features and / or advantages arising from the claims, the description or the drawings, including structural details or spatial arrangements, can be essential to the invention both individually and in a wide variety of combinations. Reference number

I gear unit

10 main drive shaft

I I main drive gear

12 gun shaft

13 crank arm

14 coupling arm

15 eccentric bush

16 tear-off cylinder gears

17 tear-off cylinders

18 tear-off cylinders

19 output shaft

20 actuator unit

21 Round comb shaft

22 round comb roller

23 control motor

24 control unit

25 gear stage

26 Pushrod Rod Assembly

27 drive motor

28 coupling rod

29 sun gear

30 auxiliary shaft

31 auxiliary transmissions

32 table calender roll

33 Delivery roller

34 gear

35 intermediate gear

36 coupling arm

37 brush motor

38 cleaning brush

39 engine

40 winding roller

41 planet carriers

P1 Phase position of the pilgrim step movement of the output shaft

P2 Phase position of the pilgrim step movement of the tear-off cylinder U1 reversal point

U2 reversal point a angle of rotation t time in ms

Claims

1 . Gear unit (1) of a combing machine for spinning preparation, comprising: a main drive shaft (10) which can be driven via a main drive wheel (11) by means of a drive motor (27), a tong shaft (12) which is connected to a main drive wheel (11) Crank rocker (13) can be set in an oscillating back and forth rotary movement, a coupling rocker (14) which is connected to the tong shaft (12) in such a way that the coupling rocker (14) can be rotated in an oscillating manner from the tong shaft (12), a tear-off cylinder gear (16), which is set up to drive at least one tear-off cylinder (17, 18), and wherein the tear-off cylinder gear (16) can be continuously driven via the main drive shaft (10) and the oscillating gear (16) in the tear-off cylinder gear (16) by means of the coupling rocker (14) Movement can be introduced which can be superimposed on the continuous drive by means of the main drive shaft (10) in the tear-off cylinder transmission (16), so that with an output shaft (19) of the tear-off cylinder gear (16) a pilgrim step movement can be carried out, characterized in that an actuating gear unit (20) and a control motor (23) are provided, the output shaft (19) of the tear-off cylinder gear (16) being operatively connected to the actuating gear unit (20) and wherein the control motor (23) is set up for introducing a rotary movement into the actuating gear unit (20) to superimpose the rotary movement of the output shaft (19) of the tear-off cylinder gear (16) with the actuating gear unit (20).

2. Gear unit (1) according to claim 1, characterized in that the

Actuating gear unit (20) is designed as a planetary gear, which is arranged between the tear-off cylinder gear (16) and the tear-off cylinders (17, 18).

3. Gear unit (1) according to claim 1 or 2, characterized in that the output shaft (19) is operatively connected to a sun gear of the planetary gear forming the actuating gear unit (20).

4. Gear unit (1) according to one of the preceding claims, characterized in that the control motor (23) is operatively connected to a planet carrier (41) of the planetary gear forming the actuating gear unit (20). 5 gear unit (1) according to any one of the preceding claims, characterized in that the coupling rocker (14) is rotatably mounted on an eccentric bushing (15) through which the main drive shaft (10) extends and with a circular comb shaft (21) for driving a Round comb roller (22) is in connection.

6 gear unit (1) according to any one of the preceding claims, characterized in that the tear-off cylinder gear (16) is coupled to the main drive shaft (10) by means of a gear stage (25) and is further coupled to the coupling rocker (14) by means of a push-joint rod unit (26) .

7 transmission unit (1) according to any one of the preceding claims, characterized in that a control unit (24) is set up with which the control motor (23) can be controlled to perform a continuous or discontinuous, a periodic and / or repetitive rotary movement.

8 combing machine for spinning preparation with a gear unit (1) according to one of the preceding claims. 9 combing machine according to claim 8, characterized in that the combing machine has several combing units with respective gear units (1), wherein the control unit (24) is set up centrally and is designed to control all control motors (23) of each gear unit (1).