GEAR UNIT FOR A COMBING MACHINE AND COMBING MACHINE WITH GEAR UNIT

Description

[0001] 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 comprising a main drive shaft which is drivable via a main drive wheel by means of a drive motor, a tongs shaft which can be set into an oscillating back-and-forth rotational movement by means of a crank rocker connected to the main drive wheel, a coupling rocker which is connected to the tongs shaft in such a way that the coupling rocker can be rotated in an oscillating manner by the tongs shaft, and wherein the gear unit further comprises a break-off cylinder gear which is designed to drive at least one break-off cylinder, and wherein the break-off cylinder gear is continuously drivable via the main drive shaft, and wherein the oscillating movement can be introduced into the break-off cylinder gear by means of the coupling rocker.which can be superimposed on the continuous drive by means of the main drive shaft in the detachable cylinder gear, so that a pilgrim step movement can be executed with an output shaft of the detachable cylinder gear. Furthermore, the invention relates to a combing machine with a gear unit as described above.

[0002] For example, DE 10 2012 011 030 A1 discloses a gear unit for a combing machine for spinning preparation. The gear unit comprises, as essential structural components, a main drive shaft that drives a pincer gear. The pincer gear serves to drive a pincer apparatus with an upper pincer and a lower pincer. Furthermore, the gear unit comprises a detaching cylinder gear for driving two detaching cylinders, which, together with counter-detaching cylinders, form respective cylinder pairs between which the fiber product to be combed is guided. The detaching cylinder gear is usually designed as a planetary gear in a conventional manner.

[0003] CN 202954168 U and CH 714582 A1 disclose combing machines in which the angular velocity and angular acceleration of the phase progression of the detaching cylinders are varied over the comb clearance by using non-circular gears or cam discs to drive the detaching cylinders.

[0004] DE 19612808 A1 also discloses a combing machine in which the pilgrim step movement of the tear-off rollers can be changed by a modulation drive.

[0005] The key challenge in designing such a gear unit is generating a so-called pilger-step motion for the combing machine's detachment cylinders and influencing the motion curve of the pilger-step motion as simply as possible. To generate the pilger-step motion, the planetary gear is permanently driven with a continuous rotary motion via the main drive shaft. This continuous drive motion is superimposed with a further oscillating motion, which is also introduced into the detachment cylinder gear by means of a sliding rod unit, for example, via another component of the planetary gear such as the sun gear. This ultimately enables the pilger-step motion to be generated at a gear output of the planetary gear, which is usually introduced directly into the detachment cylinders.The oscillating movement is captured by the oscillating tongs shaft via the sliding joint rod unit, with the coupling rocker and other components being used for this purpose. This is energy-efficient, as the oscillating tongs shaft is necessary to drive the tongs apparatus anyway. The coupling rocker, which oscillates via the tongs shaft, is mounted on an eccentric bushing that is rotatably mounted on the main drive shaft.

[0006] The pliers shaft is set into an oscillating back and forth movement by means of a crank rocker, whereby the crank rocker is connected to the main drive wheel in a rotating manner, and the main drive wheel is drivingly connected to the main drive shaft, which is ultimately driven by the drive motor.

[0007] The breakaway cylinder gear can be designed as a planetary gear, and the breakaway cylinders are driven equally via a distribution stage, for example made up of spur gears, via the output shaft of the breakaway cylinder gear, whereby the breakaway cylinders execute a fixed movement curve of the pilgrim step movement, which directly follows the movement curve on the output shaft of the breakaway cylinder gear.

[0008] The object of the invention is to further develop a gear unit of a combing machine for spinning preparation, wherein the motion curve of the piling step movement is to be easily influenced by a gear structure according to the preamble of claim 1. In particular, the influence is to be executable by means of an electrical control unit. Furthermore, the object of the invention is to provide a combing machine with such an improved gear unit.

[0009] This object is achieved by a gear unit according to the preamble of claim 1 and by a combing machine according to claim 8 with the respective characterizing features. Advantageous developments of the invention are specified in the dependent claims.

[0010] The invention includes the technical teaching that an actuating gear unit and a control motor are provided, wherein the output shaft of the tear-off cylinder gear is operatively connected to the actuating gear unit and wherein the control motor is configured to introduce a rotary movement into the actuating gear unit, which can be superimposed on the output shaft of the tear-off cylinder gear with the actuating gear unit.

[0011] The core idea of ​​the invention is the further development of the gear unit of a combing head of a combing machine with an adjusting gear unit that is operatively connected to a control motor. This allows the curve of the pilgrim step movement in the detaching cylinders to be influenced with the electrically actuated control motor, while the curve of the basic pilgrim step movement on the output shaft of the detaching cylinder gear can remain unchanged. For example, the angular velocity and angular acceleration of the phase curve of the detaching cylinders can be changed over the comb clearance.

[0012] An advantage of the inventive arrangement of an actuating gear unit on the output shaft of the breakaway cylinder gear is its retrofit capability, since the connection between the output shaft and the breakaway cylinders can be easily removed, and the actuating gear unit according to the invention can be connected to the output shaft, ultimately arranging the breakaway cylinders at the gear output of the actuating gear unit. The control motor can be designed as a structural unit with the actuating gear unit, and the control motor can be used to introduce a defined rotary motion into the actuating gear unit, similar to the defined oscillating motion introduced into the breakaway cylinder gear by the tongs shaft via the coupling rocker.

[0013] The actuating gear unit is designed as a planetary gear located in the drive train between the breakaway cylinder gear and the breakaway cylinders. The design of the planetary gear forming the actuating gear unit can be identical to the design of the breakaway cylinder gear, which can also be designed as a planetary gear.

[0014] In particular, two actuating gear units according to the invention can be arranged downstream of the breakaway cylinder gear, preferably in the form of a planetary gear, on the output shaft of the breakaway cylinder gear. These actuating gear units are driven equally by the output shaft but have respective control motors, so that a front and a rear breakaway cylinder can be controlled separately and can have a different phase position relative to each other. In particular, the adjustment can be made such that the phase position of the rear breakaway cylinder lags behind the phase position of the front breakaway cylinder, which is made possible by the two control motors on the respective actuating gear units.

[0015] According to a further advantageous embodiment of the invention, the output shaft can be operatively connected to a sun gear of the planetary gear forming the actuating gear unit. Furthermore, the control motor can be operatively connected to a planetary carrier of the planetary gear forming the actuating gear unit.

[0016] 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 pinion shaft for driving a circular pinion roller. The actuating gear unit according to the invention has a shaft set whose shafts extend parallel to the main drive shaft and / or parallel to the circular pinion shaft. This allows the gear unit to be designed with a particularly compact construction.

[0017] It is also conceivable for the breakaway cylinder gear to be coupled to the main drive shaft by means of a gear stage and further coupled to the coupling rocker by means of a sliding rod unit. Thus, the basic structure of the gear unit can be implemented in a conventional design, and the actuating gear unit according to the invention, together with the control motor, can be easily retrofitted.

[0018] According to a further aspect of the invention, a control unit can be set up with which the control motor can be controlled to carry out a continuous or discontinuous, a periodic and / or repeating rotary movement.

[0019] The control unit can be formed by an operating unit already present on the combing machine, or the control unit can be an integral part of the existing operating unit. The control unit, which is particularly designed as an interactive interface, can, for example, control the control motor to adjust the phase position of the piling motion of the detaching cylinders relative to the piling motion of the output shaft of the detaching cylinder gear.

[0020] The invention further relates to a combing machine for spinning preparation with a gear unit as described above. The combing machine can have multiple combing units with respective gear units, wherein the control unit can be arranged centrally and can be designed to control all control motors of each gear unit. Naturally, the multiple gear units can be adjusted equally, particularly with regard to the phase position of the detachment rollers, by means of identical control of the control motors in each of the combing heads, in particular via uniform operation of a control unit common to all combing heads.

[0021] Further measures improving the invention are described in more detail below together with the description of a preferred embodiment of the invention with reference to the figures.

[0022] They show: Fig. 1 shows a gear unit for a combing machine according to the prior art, Fig. 2 shows a view of a gear unit for a combing machine with an exemplary actuating gear unit together with a control motor, Fig. 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.

[0023] First, Figure 1 which shows a gear unit 1 of a combing machine for spinning preparation, wherein the described features are identified by the corresponding reference numerals in Figure 2 must also be taken into account, and in connection with Figure 2 not be written again.

[0024] The Figures 1 and 2 each show a transmission unit 1, wherein the transmission unit 1 according to Figure 1 reflects the state of the art, whereas in Figure 2the features of the invention are described separately.

[0025] The transmission unit 1 has a main drive shaft 10, which is driven via a main drive gear 11 by means of a drive motor 27. The drive motor 27 initially drives a secondary shaft 30, which is part of a secondary transmission 31. The secondary transmission 31 drives, for example, table calender rolls 32 and, for example, delivery rolls 33.

[0026] A gear 34 is mounted on the auxiliary shaft 30, which meshes with the main drive gear 11, and the main drive gear 11 has a rigid connection to the main drive shaft 10, which is consequently also continuously driven in rotation by the drive motor 27.

[0027] 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 is designed as a planetary gear and drives the tear-off cylinders 17 and 18 directly with the pilgrim step movement.

[0028] A crank arm 13 is arranged at an off-center point on the main drive wheel 11, 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 detail) in order to oscillate at least one upper tong of the tong apparatus relative to a lower tong in order to release the fiber strand between the upper tong and lower tong and to hold it again.

[0029] The tongs shaft 12 is further connected to the coupling rocker 14 via a coupling arm 36, and the oscillating movement of the tongs shaft 12 is transmitted to the coupling rocker 14 via the coupling arm 36, which is rigidly attached to the tongs shaft 12. The coupling rocker 14 can execute the torsional oscillating movement on an eccentric bushing 15, which is rotatably mounted on the main drive shaft 10 itself.

[0030] On an opposite side of the connection of the coupling arm 36, the coupling rocker 14 is connected to the breakaway cylinder gear 16 by means of a sliding joint rod unit 26, so that the oscillating movement of the coupling rocker 14 introduces a discontinuous, yet periodic oscillating movement into the breakaway cylinder gear 16, which is superimposed on the continuous rotary movement from the main drive shaft 10 and the gear stage 25. As a result, the breakaway cylinders 17 and 18 can be driven with the required pilgrim step movement.

[0031] Also shown is a brush motor 37 for driving a cleaning brush 38, and a motor 39 is provided which serves to drive at least two winding rollers 40 on which the fiber winding is placed.

[0032] A coupling rod 28 is provided as a connection between the main drive gear 11 and the eccentric bushing 15. A rotational movement is introduced into the eccentric bushing 15 via the coupling rod 28, which creates a forced rotation of the eccentric bushing 15 depending on the rotation of the main drive gear 11.

[0033] Figure 2 shows in comparison to Figure 1 a gear unit 1 expanded according to the invention, which has an adjusting gear unit 20. The adjusting gear unit 20 is connected to the output shaft 19 of the breakaway cylinder gear 16, so that a pilgrim step movement is already initiated into the adjusting 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 breakaway cylinder gear 16 designed as a planetary gear.

[0034] 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.

[0035] If the control motor 23 is activated, it rotates a planet carrier 41 of the actuating gear unit 20, which is designed as a planetary gear, via a control shaft 42, so that the breakaway 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.

[0036] If the control motor 23 is designed as a servo motor, for example, the phase position P2 can be generated upon activation of the servo motor, which deviates from the phase position P1, in particular between the reversal points U1 and U2, as in Figure 3 shown.

[0037] In Figure 3For this purpose, the time t in ms over which the tear-off cylinders 17 and 18 perform the rotational movement at the angle α is plotted on the abscissa. The latter is plotted on the ordinate. The control motor 24 is controlled by a control unit 24, in particular by a touch-sensitive screen.

[0038] If the tear-off cylinders 17, 18 - in contrast to this invention - are each driven and controlled by a servo motor, so that the angular velocity and angular acceleration of the phase curve of each tear-off cylinder 17, 18 can be controlled separately, this has the disadvantage of high investment costs. In addition, energy consumption increases because the simulation of the pilgrim's step movement by the servo motors at speeds above 500 rpm consumes a lot of energy and heats up considerably due to the constant acceleration and deceleration. The invention is therefore based on the finding that only a small phase deviation by means of an intermediate actuating 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 required energy are supplied by the gear unit 1 orThe breakaway cylinder gear 16 is already predefined and present, so 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. Energy consumption is also significantly lower, and the inventive solution is retrofittable.

[0039] The invention is not limited in its implementation to the preferred embodiment given above. Reference symbol

[0040] 1 Gear unit 10 Main drive shaft 11 Main drive gear 12 Pinion shaft 13 Crank rocker 14 Coupling rocker 15 Eccentric bushing 16 Break-off cylinder gear 17 Break-off cylinder 18 Break-off cylinder 19 Output shaft 20 Adjusting gear unit 21 Circular comb shaft 22 Circular comb roller 23 Control motor 24 Control unit 25 Gear stage 26 Thrust joint rod unit 27 Drive motor 28 Coupling rod 29 Sun gear 30 Secondary shaft 31 Secondary gear 32 Table calender roller 33 Delivery roller 34 Gear 35 Intermediate gear 36 Coupling arm 37 Brush motor 38 Cleaning brush 39 Motor 40 Winding roller 41 Planetary carrier P1Phase position of the pilgrim step movement of the output shaft P2Phase position of the pilgrim step movement of the breakaway cylinders U1Reversal point U2Reversal point αAngle of rotation tTime in ms

Claims

1. Gear unit (1) of a combing machine for spinning preparation, having: - a main drive shaft (10) which can be driven by means of a drive motor (27) by way of a main drive wheel (11), - a nipper shaft (12) which can be made to move in an oscillating to and fro 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 manner that the coupling linkage (14) can be moved in an oscillating rotating manner by the nipper shaft (12), - a detaching cylinder gear (16) which is adapted for driving at least one detaching cylinder (17, 18), and wherein - the detaching cylinder gear (16) can be driven continuously by way of the main drive shaft (10), and wherein - the oscillating movement can be introduced into the detaching cylinder gear (16) by means of the coupling linkage (14) and can be applied to the continuous drive by means of the main drive shaft (10) in the detaching cylinder gear (16), so that a pilgrim step movement can be performed with an output shaft (19) of the detaching cylinder gear (16), characterised in that an adjusting gear unit (20) and a control motor (23) are provided, wherein the output shaft (19) of the detaching cylinder gear (16) is in operative connection with the adjusting gear unit (20) and wherein the control motor (23) is adapted for introducing a rotational movement into the adjusting gear unit (20) in order to apply the rotational movement to the output shaft (19) of the detaching cylinder gear (16) using the adjusting gear unit (20), wherein the adjusting gear unit (20) is in the form of a planetary gear which is arranged between the detaching cylinder gear (16) and the detaching cylinders (17, 18).

2. Gear unit (1) according to claim 1, characterised in that the output shaft (19) is in operative connection with a sun wheel of the planetary gear forming the adjusting gear unit (20).

3. Gear unit (1) according to any one of the preceding claims, characterised in that the control motor (23) is in operative connection with a planetary carrier (41) of the planetary gear forming the adjusting gear unit (20).

4. Gear unit (1) according to any one of the preceding claims, characterised in that the coupling linkage (14) is rotatably mounted on an eccentric bushing (15) through which the main drive shaft (10) extends and is connected to a circular comb shaft (21) for driving a circular comb roll (22).

5. Gear unit (1) according to any one of the preceding claims, characterised in that the detaching cylinder gear (16) is coupled with the main drive shaft (10) by means of a gear stage (25) and is further coupled with the coupling linkage (14) by means of a sliding joint rod unit (26).

6. Gear unit (1) according to any one of the preceding claims, characterised in that a control unit (24) can be installed, with which control unit the control motor (23) can be actuated to perform a continuous or discontinuous rotational movement, a periodic rotational movement and / or a rotational movement which repeats in sequence.

7. Combing machine for spinning preparation, having a gear unit (1) formed in accordance with any one of the preceding claims.

8. Combing machine according to claim 7, when dependent from claim 6, characterised in that the combing machine has a plurality of combing units having respective gear units (1), wherein the control unit (24) is installed centrally and is configured to actuate all the control motors (23) of each gear unit (1).