CN115803486A

CN115803486A - Drive unit for a combing machine and combing machine having a drive unit

Info

Publication number: CN115803486A
Application number: CN202180045458.7A
Authority: CN
Inventors: 得克·美尔
Original assignee: Trutschler Group Europe
Current assignee: Trutschler Group Europe
Priority date: 2020-06-30
Filing date: 2021-05-26
Publication date: 2023-03-14
Also published as: EP4172391A1; DE102020117233A1; WO2022002488A1

Abstract

The invention relates to a transmission unit (1) for a combing machine of a spinning preparation device, comprising a drive spindle (10) which can be driven by a main drive wheel (11) by means of a drive motor (27), a nipper shaft (12) which can be set in an oscillating back-and-forth rotary motion by means of a crank rocker (13) connected to the main drive wheel (11), a coupling rocker (14) which is connected to the nipper shaft (12) such that the coupling rocker (14) can be moved in an oscillating rotary motion by the nipper shaft (12), and a separating drum transmission (16) which is provided for driving at least one separating drum (17, 18), wherein the separating drum transmission (16) can be continuously driven by the drive spindle (10), and wherein an oscillating motion can be introduced into the separating drum transmission (16) by means of the coupling rocker (14), which can be superimposed in the separating drum transmission (16) with the continuous drive by means of the drive spindle (10), such that a piler motion can be performed by means of an output shaft (19) of the separating drum transmission (16). According to the invention, an adjustment transmission unit (20) and a control motor (23) are provided, wherein the output shaft (19) of the separating drum transmission (16) is operatively connected to the adjustment transmission unit (20), and wherein the control motor (23) is provided for introducing a rotational movement into the adjustment transmission unit (20), which rotational movement can be applied to the output shaft (19) of the separating drum transmission (16) by means of the adjustment transmission unit (20).

Description

Drive unit for a combing machine and combing machine having a drive unit

Technical Field

The invention relates to a drive unit for a combing machine of a spinning preparation device according to the preamble of claim 1. The invention relates in particular to a transmission unit having a drive spindle which can be driven by a drive motor via a main drive wheel, a gripper shaft which can be set into an oscillating back-and-forth rotary motion by means of a crank rocker connected to the main drive wheel, a coupling rocker connected to the gripper shaft, so that the coupling rocker can be moved in an oscillating rotary motion by the gripper shaft, and wherein the transmission unit further has a separating drum transmission which is provided for driving at least one separating drum, and wherein the separating drum transmission can be driven continuously by the drive spindle, and wherein an oscillating motion can be introduced into the separating drum transmission by means of the coupling rocker, which oscillating motion can be superimposed in the separating drum transmission with a continuous drive by means of the drive spindle, so that a piler-type motion can be performed by means of an output shaft of the separating drum transmission. The invention also relates to a combing machine with a transmission unit as described above.

Background

DE 102012011030A1 discloses, for example, a transmission unit for a combing machine of a spinning preparation device, and the transmission unit has, as a main component, a drive spindle which drives a nipper transmission, wherein the nipper transmission is used to drive a nipper assembly having an upper nipper and a lower nipper. The transmission unit furthermore has a separating cylinder transmission for driving two separating cylinders, which form respective cylinder pairs with the associated separating cylinder, between which the fibre product to be combed is guided, wherein the separating cylinder transmission is usually designed in a manner known per se as a planetary transmission.

The main challenge in designing such a transmission unit is to generate a so-called pilger pattern movement for the separating cylinder of the combing machine and to influence the movement profile of the pilger pattern movement as simply as possible. In order to produce the pilger movement, the planetary gear is driven continuously by the drive spindle with a continuous rotational movement. This continuous drive movement is superimposed on a further oscillating movement, which is likewise introduced into the separating drum gear by means of the sliding joint lever unit, for example via a further component of the planetary gear (for example the sun gear), as a result of which ultimately a pell-type movement can be generated at the gear output of the planetary gear, which is generally introduced directly into the separating drum. The oscillating movement is obtained by the oscillating nipper shaft by means of the sliding articulated lever unit, wherein this obtaining is achieved by means of the coupling rocker and other components, which is energetically advantageous since the oscillating nipper shaft is inherently necessary for driving the nipper assembly. The coupling rocker, which is moved in an oscillating manner by the nipper shaft, is mounted on an eccentric sleeve, which is mounted on the drive spindle in a rotationally movable manner.

The nipper shaft is set in an oscillating back and forth movement by means of a crank rocker, which is connected to a main drive wheel, runs around with it and is drivingly connected to a drive spindle, which is finally driven by means of a drive motor.

The separating drum gear can be designed as a planetary gear and the separating drum is driven by a distributor stage, which is composed of spur gears, for example, and likewise by the output shaft of the separating drum gear, whereby the separating drum executes a fixed, predetermined motion profile of the pilger-like motion which directly follows the motion profile of the output shaft of the separating drum gear.

Disclosure of Invention

The object of the invention is to improve a drive unit of a combing machine for a spinning preparation device, wherein, starting from a drive according to the preamble of claim 1, the motion curve of the pell-type motion can be influenced in a simple manner. This influence can be implemented in particular by means of an electronic control unit. The object of the invention is, furthermore, to provide a combing machine having such an improved drive unit.

This object is achieved by a drive unit according to the preamble of claim 1 and by a combing machine according to claim 8 with the features of the corresponding features. Advantageous developments of the invention are specified in the dependent claims.

The invention comprises the following technical teaching: an adjustment gear unit and a control motor are provided, wherein the output shaft of the separating drum gear unit is operatively connected to the adjustment gear unit, and wherein the control motor is provided for introducing a rotary motion into the adjustment gear unit, which rotary motion can be applied to the output shaft of the separating drum gear unit by means of the adjustment gear unit.

The invention is based on the core idea of improving the drive unit of the combing head of a combing machine with an adjusting drive unit, which is operatively connected to a control motor, so that the curve course of the pell-format movement in the separating cylinder can be influenced by means of the electrically actuable control motor, while the curve course of the basic pell-format movement from the output shaft of the separating cylinder drive remains unchanged. For example, the angular velocity and the angular acceleration of the phase progression of the separating cylinder can be varied over the combing interval.

The arrangement according to the invention of the adjustment gear unit on the output shaft of the drum gear mechanism has the advantage of being retrofittable, since the connection of the output shaft to the separating drum can be detached in a simple manner and the adjustment gear unit according to the invention can be connected to the output shaft in order to finally arrange the separating drum on the gear output of the adjustment gear unit. The control motor can be designed as a structural unit with the adjustment gear unit and, with the control motor, a specific rotary motion can be introduced into the adjustment gear unit, similar to the specific oscillating motion introduced from the nipper shaft via the coupling rocker into the drum gear.

The adjustment gear unit is advantageously designed as a planetary gear, which is preferably arranged in the drive train between the separating drum gear and the separating drum. The planetary gear mechanism forming the adjustment gear unit may have the same configuration as the separating drum gear mechanism, which may also be configured as a planetary gear mechanism.

In accordance with the separating drum gear, preferably in the form of a planetary gear, in particular two adjusting gear units according to the invention can be arranged on the output shaft of the separating drum gear, which, although likewise driven by the output shaft, have respective control motors, so that the front separating drum and the rear separating drum can be actuated separately and can have different phases from one another. In particular, the adjustment can be carried out such that the phase position of the rear separating drum follows the phase position of the front separating drum, which can be achieved by two control motors on the respective adjusting rotary unit.

According to a further advantageous embodiment of the invention, the output shaft can be operatively connected to a sun gear of a planetary gear set forming the adjustment gear unit.

Furthermore, the control motor can be operatively connected to a planet carrier of a planetary gear set forming the adjustment gear unit.

It is also advantageous if the coupling rocker is mounted rotatably on an eccentric sleeve through which the drive spindle extends and is connected with the circular comb shaft for driving the circular comb roller. The adjustment gear unit according to the invention has a shaft group, the shafts of which all extend parallel to the drive spindle and/or parallel to the circular comb shaft. The transmission unit can thereby be constructed particularly compactly.

It is also conceivable for the separating drum gear to be coupled to the drive spindle by means of a gear stage and also to be coupled to the coupling rocker by means of a sliding joint lever unit. The basic design of the transmission unit can thus be designed in a manner known per se, and the adjustment transmission unit according to the invention can be easily retrofitted with the control motor.

According to a further aspect of the invention, a control unit can be provided, with which the control motor can be actuated to execute a continuous or discontinuous, periodic and/or in-process repetitive rotary movement.

The control unit can be formed by an existing operating unit on the combing machine or it can be an integral part of the existing operating unit. By means of a control unit, which is designed in particular as an interface, it is possible, for example, to actuate the control motor in order to correspondingly adjust the phase position of the pilger movement of the separating drum relative to the pilger movement of the output shaft of the separating drum gear.

The invention also relates to a combing machine for a spinning preparation device having a drive unit according to the above description. The combing machine can have a plurality of combing units each with a drive unit, wherein the control unit can be arranged centrally and can be designed to control all the control motors of each drive unit. Of course, it is possible in particular to adjust the plurality of transmission units identically in each combing head by means of identical actuation of the control motors in relation to the phase of the detaching rollers, in particular by uniformly operating a control unit common to all combing heads.

Drawings

Further measures which improve the invention are explained in more detail below together with the description of preferred embodiments of the invention with the aid of the drawing.

In the figure:

figure 1 shows a prior art transmission unit for a combing machine,

fig. 2 shows a view of a transmission unit for a combing machine, with an exemplary adjustment transmission unit and a control motor,

fig. 3 shows a graph in which the phase of the front detaching roller and the phase of the rear detaching roller are plotted against time.

Detailed Description

Fig. 1 is described first, fig. 1 showing a drive unit 1 of a combing machine for a spinning preparation device, wherein the features described in fig. 2 and the associated reference numerals are likewise taken into account and are not described repeatedly in the context of fig. 2.

Fig. 1 and 2 each show a transmission unit 1, wherein the transmission unit of fig. 1 represents the prior art, while the features of the invention are separately described in fig. 2.

The gear unit 1 has a drive spindle 10 which is driven by a drive motor 27 via a main drive wheel 11. The drive motor 27 first drives an auxiliary shaft 30, which is part of an auxiliary gear 31, wherein the auxiliary gear 31 drives, for example, a table-top pressure roller 32 and, for example, a delivery roller 33.

On the auxiliary shaft 30 is mounted a gear wheel 34 which meshes with the main drive wheel 11 and the main drive wheel 11 has a rigid connection with the drive spindle 10, which is therefore also driven continuously in rotation by the drive motor 27.

The drive spindle 10 interacts via an intermediate gear 35 with the circular comb shaft 21, via which the circular comb roller 22 is driven. Furthermore, the drive spindle 10 is connected to a gear stage 25, via which the separating drum gear 16 is driven continuously in order to drive the separating

drums

17 and 18, wherein the separating drum gear 16 is designed as a planetary gear and the separating

drums

17 and 18 are driven directly in a pilgerschrittbeweging motion (pilgerschrittbewing).

On the main drive wheel 11, a crank arm 13 is arranged at an eccentric point, by means of which an oscillating movement is introduced into the nipper shaft 12. The oscillating movement is transferred by the nipper shaft 12 into a nipper mechanism, not shown in detail, in order to move the upper nipper of the nipper mechanism in an oscillating manner relative to the lower nipper, so that the fiber bundle between the upper nipper and the lower nipper is released and held again.

The jaw shaft 12 is also connected to the coupling rocker 14 via a coupling arm 36, and the oscillating movement of the jaw shaft 12 is guided into the coupling rocker 14 via the coupling arm 36, which is rigidly fastened to the jaw shaft 12. The coupling rocker 14 can perform a rotary oscillating movement on an eccentric sleeve 15, which is itself mounted rotatably on the drive spindle 10.

On the opposite side of the connection of coupling arms 36, coupling rocker 14 is connected to separator drum gear 16 by means of a sliding joint lever unit 26, so that, with the pivoting movement of coupling rocker 14, a discontinuous, but periodic pivoting movement is introduced into separator drum gear 16, which is superimposed on the continuous rotational movement caused by drive spindle 10 and gear stage 25. The result is that the separating

cylinders

17 and 18 can be driven with the desired pilger format movement.

A commutator motor 37 for driving a cleaning brush 38 is also shown and a motor 39 is provided for driving at least two winding rollers 40 on which the fiber reels are placed.

The coupling link 28 is provided as a connecting portion between the main driving wheel 11 and the eccentric sleeve 15. A rotary motion is introduced via the coupling rod 28 into the eccentric sleeve 15, which produces a forced rotation of the eccentric sleeve 15 in accordance with the rotation of the main drive wheel 11.

Fig. 2 shows, in contrast to fig. 1, a transmission unit 1 according to the invention with an adjustment transmission unit 20. The adjustment gear unit 20 is connected to the output shaft 19 of the separating drum gear 16, so that the pilger movement can be introduced into the adjustment gear unit 20 already via the output shaft 19. For this purpose, the output shaft 19 is connected to a sun gear 29, which is a component of the separating drum gear 16 embodied as a planetary gear.

If the control motor 23 is stationary, the separating

cylinders

17 and 18 execute a pilger movement in phase, which is also introduced into the adjusting gear unit 20 via the output shaft 19.

If the control motor 23 is activated, it rotates the planet carrier 41 of the adjusting gear unit 20, which is designed as a planetary gear set, via the control shaft 42, so that the separating

cylinders

17 and 18 finally lead or follow the phase P1 of the pilger-like movement of the output shaft 19, depending on the setting.

If the control motor 23 is configured as a servomotor, for example, a phase P2 can be generated when the servomotor is activated, which phase differs from the phase P1, in particular between the reversal points U1 and U2, as shown in fig. 3.

For this purpose, the time t is plotted on the abscissa in ms in fig. 3, during which the separating

cylinders

17 and 18 perform a rotational movement at the angle α. The latter is plotted on the ordinate. The motor 24 is controlled by means of a control unit 24, in particular by means of a touch-sensitive screen control.

In contrast to the present invention, it is disadvantageous that the investment costs are high if the separating

cylinders

17, 18 are driven and actuated by means of a servomotor in each case, so that the angular velocity and the angular acceleration of the phase progression of each separating

cylinder

17, 18 can be actuated individually. The energy consumption is also increased, since the imitation of the pilger movement by the servomotor at rotational speeds of more than 500 revolutions/min consumes a large amount of energy and heats up strongly due to the constant acceleration and braking. The invention is therefore based on the recognition that: only a small phase deviation produced by the interposed adjustment gear unit 20 with the control motor 23 is sufficient to achieve a phase deviation of up to +/-10% with respect to the nominal rotational speed of the separating

drums

17, 18. Since the nominal rotational speed and the required energy are already predetermined and present on account of the gear unit 1 or the separating drum gear 16, only differences in the movement deviations are introduced into the gear unit 1. The investment costs are significantly lower than in the case of using a servomotor. The energy consumption is also significantly lower and the solution according to the invention is retrofittable.

The invention is not limited in its implementation to the preferred embodiments given above. Rather, variants are conceivable which also use the solution in fundamentally different types of embodiments. All features and/or advantages, including structural details or spatial arrangements, which are derived from the claims, the description or the drawings, are essential to the invention both in themselves and in various combinations.

List of reference numerals

1. Transmission unit

10. Driving spindle

11. Main driving wheel

12. Nipper shaft

13. Crank rocker

14. Coupling rocker arm

15. Eccentric sleeve

16. Separating cylinder transmission mechanism

17. Separating cylinder

18. Separating cylinder

19. Output shaft

20. Adjusting a transmission unit

21. Round comb shaft

22. Round comb shaft

23. Control motor

24. Control unit

25. Gear stage

26. Sliding hinge rod unit

27. Driving motor

28. Coupling link rod

29. Sun wheel

30. Auxiliary shaft

31. Auxiliary transmission mechanism

32. Table type pressing roller

33. Delivery roller

34. Gear wheel

35. Intermediate transmission mechanism

36. Coupling arm

37. Commutator motor

38. Cleaning brush

39. Motor with a stator having a stator core

40. Winding roller

41. Planet carrier

Phase of pilger-like motion of P1 output shaft

Phase of pilfer-like motion of P2 separator drum

U1 reversal point

Point of inversion of U2

Angle of rotation alpha

time t, in ms.

Claims

1. A drive unit (1) of a combing machine for a spinning preparation device comprises:

a drive spindle (10) which can be driven by means of a drive motor (27) via a main drive wheel (11),

a nipper shaft (12) which can be set in an oscillating back-and-forth rotating movement by means of a crank rocker (13) connected to the main drive wheel (11),

a coupling lever (14) which is connected to the jaw shaft (12) in such a way that the coupling lever (14) can be moved in an oscillating rotational manner by the jaw shaft (12),

a separating drum drive (16) which is provided to drive at least one separating drum (17, 18) and in which,

the separating drum drive (16) can be continuously driven by the drive spindle (10) and, in this case,

can introduce an oscillating movement into the separating drum gear (16) by means of the coupling rocker (14), said oscillating movement being able to be superimposed in the separating drum gear (16) with a continuous drive by means of the drive spindle (10) in such a way that a pilger movement can be performed by means of the output shaft (19) of the separating drum gear (16),

an adjusting gear unit (20) and a control motor (23) are provided, wherein the output shaft (19) of the separating drum gear (16) is operatively connected to the adjusting gear unit (20), and wherein the control motor (23) is provided for applying a rotational movement to the output shaft (19) of the separating drum gear (16) by means of the adjusting gear unit (20) in order to introduce said rotational movement into the adjusting gear unit (20).

2. Drive unit (1) according to claim 1, characterized in that the adjustment drive unit (20) is configured as a planetary gear drive which is arranged between the separating drum drive (16) and the separating drum (17, 18).

3. Transmission unit (1) according to claim 1 or 2, characterized in that the output shaft (19) is in operative connection with a sun gear of a planetary gear forming the adjustment transmission unit (20).

4. Transmission unit (1) according to one of the preceding claims, characterized in that the control motor (23) is operatively connected to a planet carrier (41) forming a planetary gear of the adjustment transmission unit (20).

5. Drive unit (1) according to one of the preceding claims, characterized in that the coupling rocker (14) is rotatably mounted on an eccentric sleeve (15) through which the drive spindle (10) extends and is connected with the circular comb shaft (21) for driving the circular comb roller (22).

6. Drive unit (1) according to one of the preceding claims, characterized in that the separating drum drive (16) is coupled with the drive spindle (10) by means of a gear stage (25) and is also coupled with the coupling rocker (14) by means of a sliding joint lever unit (26).

7. Transmission unit (1) according to one of the preceding claims, characterized in that a control unit (24) is provided, with which the control motor (23) can be actuated to perform a continuous or discontinuous, periodic and/or in-process repeated rotary motion.

8. Combing machine for a spinning preparation device, having a drive unit (1) according to one of the preceding claims.

9. Combing machine according to claim 8, wherein the combing machine has a plurality of combing units which each have a drive unit (1), wherein the control unit (24) is arranged centrally and is designed to control all control motors (23) of each drive unit (1).