JP4248554B2 - Shaft drive for loom heald shaft - Google Patents

Description

The present invention relates to a shaft drive for at least one heald shaft of a loom .

For loom shedding, in principle, a plurality of heald shafts are provided, each having a plurality of healds arranged parallel to one another. The warp thread passes through the yarn eyelet. Due to shed formation, the heald shaft moves very fast up and down. For this purpose, a shaft drive called a shaft machine or eccentric machine is provided. The eccentric machine generates a vertical movement of the heald shaft from the rotational movement, allowing a fast knitting speed. However, such eccentric machines are not flexible. The production of patterns or various fabrics is only possible in a limited manner. For this reason, shaft drives are widely used where a pawl connection is provided between the drive shaft and the eccentric machine to generate heald shaft motion.

  Such a shaft machine is known, for example, from US Pat. The pawl switching mechanism provided between the eccentric machine and the drive shaft is switched for a half rotation of the drive shaft for each heald shaft movement, i.e. for an upward movement of the heald shaft or for its downward movement. Such a shaft machine is very flexible. However, due to the function of the claw switching mechanism of such a shaft machine, it is necessary that all the drive elements and driven elements and all the drives with the heald shaft be stationary during the switching phase. Therefore, the shaft machine according to the above-mentioned patent document executes switching in a fixed state (detent state).

DE 69702039 T2

  Accordingly, it is an object of the present invention to provide a shaft drive having a pawl switching mechanism that allows a high operating speed to switch during movement.

  This object is achieved by a shaft drive according to claims 1 and 2.

  The shaft drive has a clutch device having at least one drive disk for performing a predetermined (eg, uniform) rotational movement. A second drive disk that performs rotational vibrational motion is provided. This movement is completely or almost completely synchronized with the first drive disk for a short time period in the selected angular range. These short steps of the synchronized movement of the two drive disks are used to switch the drive connection of the driven disk from the first drive disk to the second drive disk and vice versa. For this purpose, one or more switching pawls (switching pawls) are provided.

  Engaged / released by the switching claw actuating device. This device is, for example, a slider that moves between two positions. The switching claw passes by the slider and operates according to the slider position. The actuating device is formed by at least one but preferably two switching levers. The switching claw passes by the switching lever and is thus actuated (eg engaged). A slot guide is preferably provided for temporary connection between the actuating device and the switching claw. The slot guide ensures, for example, that the moving switching claw rotating with the follower disk moves freely in the circumferential direction, and the slot guide transmits the switching movement directed in the radial direction to the switching claw.

  The slider is actuated by a driven rotating cam, and the slider comes into contact with the cam via a cam follower. The switching lever is actuated directly by electrical means or pneumatic means. However, it is preferable to drive the switching lever from the cam drive through the control clutch. The control clutch is operated with very little power, but a sufficiently large force is generated to move the switching lever. The switching clutch is formed by, for example, a selector finger that is controlled by a fixed or movable control magnet and vibrates and is driven. Such a device becomes a precisely responsive clutch controller that is controlled with a small energy input.

  The switching pawl is biased to the engaged or released position by the biasing device and is moved to the engaged or released position by the actuating device if necessary.

  A particularly fast responsive switching claw mechanism characterized by stable operation is obtained by the biasing device being a bistabile device having two stable switching positions. A dead center position is provided between these two positions. In this case, for the switching operation, the actuator need only move the switching claw beyond the dead center at which the switching claw switches. Despite the shock, vibration and resulting centrifugal force to which the entire mechanism is exposed, such an operation is guaranteed even at very high operating speeds.

  It is also advantageous to switch the switching claw with an actuating device equipped with a slot guide for the switching claw. In this arrangement, it is sufficient that the switching claw or the cam follower element connected to the switching claw engage with the slot guide only in the switching area, i.e. the angular area of the switching claw rotating with the driven disk where a switching step is expected. These angular ranges correspond to the upper and lower dead centers of the heald shaft.

  The switching claw is configured as a rocker-like part and includes two switching protrusions. One switching protrusion is coupled to the first drive disk, and the other is coupled to the second drive disk. In this way, the switching claw functions to selectively establish the drive connection between the first drive disk and the driven disk or the drive connection between the second drive disk and the driven disk. The switching claw may be configured as a hard rocker in which the pivot pin is connected to the driven disk. As a variant, the rocker may be a two-part part having an elastically held arm.

  In a particularly advantageous embodiment of the invention, two mutually separate switching claws are provided. In this way, the first switching claw is coupled to the first drive disk, and the second switching claw is coupled to the second drive disk. In this arrangement, the switching claw is preferably arranged on the opposite side of the driven disk. The switching pawls can be elastically biased towards their engaged position or, as mentioned above, can be coupled with a bistable biasing device having the aforementioned advantages. The embodiment with two switching claws has the advantage that the switching movement of each switching claw is set independently of the switching movement of the other switching claw. This is also advantageous for obtaining a reliable and fast operating speed and switching speed.

  When the driven disk is connected to the first drive disk, the heald shaft moves back and forth. However, if the driven disk is connected to a second drive disk that only vibrates at a limited angle, the heald shaft is in a stationary phase with only a slight oscillatory motion about the upper or lower inverted position. . However, during this oscillating movement, the heald shaft engages during a short synchronization phase. In other words, the acceleration force applied to the drive element cooperating with the heald shaft and the resulting force are smaller than in the continuous operation of the heald shaft. In any case, there is no significant change in acceleration force.

  The oscillating motion of the second drive disk is caused by a cam drive or an electric, hydraulic or pneumatic drive.

  Preferably, the drive provides continuous motion to the heald shaft not only during the motion phase, but also during the stationary phase when the heald shaft is stationary in the upper or lower inverted position in the conventional arrangement. This offers the possibility of reducing the maximum acceleration of the heald shaft. Avoiding a sudden increase in acceleration results in an impact-free operation of the heald shaft. Such an operation does not result in excessive excitation of vibrations even at high operating speeds. Therefore, the operating speed limit at which the heald shaft breaks and the heald breaks is shifted to a significantly higher working speed.

  Further details of the preferred embodiments of the present invention will become apparent from the drawings, specification or claims.

  The drawings illustrate several embodiments of the invention.

  FIG. 1 shows a heald shaft 1 and a shaft drive 2 connected thereto. The held shaft 1 is formed of a frame. The hold shaft includes a heald 95 and reciprocates up and down as indicated by arrow 3. In order to drive the heald shaft 1, a coupling device 4 is provided which is coupled to the heald shaft 1 at two or more positions 5, 6 and constitutes a driven mechanism of the shaft drive 2. The connecting device 4 has crank levers 7 and 8. These are connected on the one hand to the heald shaft 1 and on the other hand are connected directly or indirectly to the push-pull rod 9. For this purpose, this rod is connected at its output to a shaft drive 2 having a rocker arm 11 which performs a oscillating movement. The shaft drive 2 produces the back-and-forth movement indicated by the arrow 13 from the uniform rotational movement of the input shaft 12. This movement gives the heald shaft 1 a substantially harmonic vibration movement.

  In FIG. 2, curve I shows the movement of the heald shaft along the X coordinate (in the direction of arrow 3 in FIG. 1) with respect to time t. The function is, for example, a sine curve. As soon as the heald shaft 1 reaches the reversal upper position TO which stops as far as the knitting technique itself is concerned, the curve I changes to a vibration of reduced amplitude and acceleration (curve branch II). Accordingly, the heald shaft 1 vibrates in the range BTO of the reverse position rather than being stationary. Thus, near the upper maximum value, the heald shaft motion changes from curve I to curve II.

  Due to the designed oscillating motion, such oscillating motion keeps the acceleration to a minimum, so that the stress on the heald shaft 1 is reduced or limited to the maximum.

  FIG. 3 shows that the inverted position vibration in the stationary region R is maintained through multiple cycles.

As shown in FIG. 4, a plurality of heald shafts 1, 1 a, 1 b are arranged at a small distance behind each other and are driven from a common shaft drive 2 and thus from a common input shaft 12. This shaft is connected to a rotary drive 14 formed by a driven shaft of a central drive that also drives a servo motor, a normal electric motor or another part of the loom .

  Said movement of the heald shaft 1 in the movement phase B and the stationary phase R is generated by a mechanical shaft drive 2 as shown in FIGS. For each heald shaft 1, 1a, 1b, the shaft drive 2 converts the rotational movement of the input shaft 12 into the longitudinal movement of the respective output side levers 11 (11a, 11b) constituting the vibration rocker. , Each gear 15 (15a, 15b). The shaft drive 2 further has a clutch device 16 (16a, 16b) for each heald shaft 1 (1a, 1b). Thereby, the gear 15 is selectively connected to or disconnected from the input shaft 12. The clutch device 16 and the gear 15 are schematically shown in FIGS. The clutch device serves to control the movement of the heald shaft and is a control device C formed as a mechanical structure. Its structure (FIG. 7) is as follows.

  The gear 15 is formed by an eccentric portion (eccentric) 17 that vibrates the lever 11 by the connecting rod 18. Accordingly, the gear 15 functions to convert the rotational movement of the eccentric portion 17 into a reciprocating movement. The clutch device 16 has a first disk 21 and a second disk 22 (both of which are referred to as “drive disks” because they constitute the input part of the clutch device 16). Both discs 21, 22 preferably have the same diameter. However, they may have different diameters and are shown with different diameters, as will become clearer in FIG. The first disk 21 is connected to the input shaft 12 and is therefore connected to the rotary drive 14 via this shaft. Therefore, the disk 21 rotates uniformly at a substantially constant number of revolutions per minute (rpm) indicated by the arrow 23 in FIG. The second disk 22 is held so that it can rotate around the same rotation axis 24 as the first disk 21. However, it does not drive with constant rotation, but with rotational oscillating motion as shown by arrow 25.

  The clutch device 16 further has a switching member 26 formed by a switching claw 27. The switching claw can turn around the pin 28 and is held by the eccentric portion 17 (the eccentric portion constitutes an output portion of the clutch device, and is also referred to as a “driven disk”). The switching claw has a first switching protrusion 29 and a second switching protrusion 30. The switching protrusions 29 and 30 are disposed on different side surfaces of the pin 28. Two detent recesses 31, 32 positioned 180 ° apart on the disk 21 are coupled to the switching protrusion 29. Two detent recesses 33 and 34 located 180 ° apart on the disk 22 are coupled to the switching protrusion 30. The switching claw 27 is biased toward or away from the disk 21 by the switching projection 29 by a bias device 35a described later.

  At the end near the switching projection 30, the switching claw 27 is provided with a control roller 35, which is biased by the spring of the switching claw 27 radially outward with respect to the rotation shaft 24.

  The switching claw 27 is formed as a fixed rocker shown in FIG. 6 or 8, for example. Therefore, the movements of the switching protrusions 29 and 30 are firmly connected to each other.

  Further, it is advantageous to configure the switching claw 27 as a two-part component as shown in FIG. The arm 27 ′ carrying the switching projection 29 and the arm 27 ″ carrying the switching projection 30 rotate around the pin 28 independently of each other. Furthermore, the arm 27 "may comprise a protrusion that serves as a seating surface for the arm 27 '. The spring biases the arm 27 'against the protrusion. In this way, both switching projections 29, 30 are in the engaged position during the synchronization phase in which the disks 21, 22 move synchronously for a short time. Due to the division of the switching claw 27, the period during which both switching protrusions 29, 30 are engaged is greater than in the case of the single part structure. By reducing the load on the respective switching protrusions 29, 30 to be removed, the protrusions move away from the detent recesses 31, 32 or 33, 34 when appropriate.

  Two switching levers 36 and 37 are connected to the switching claw 27 (FIG. 7). Each lever has arcuate slot guides 38 and 39, respectively. Each guide is arranged substantially concentrically on the rotating shaft 24 and is formed by a substantially circular arch-shaped groove (FIG. 6). The grooves have arcuate flank during which the control roller 35 moves. As can be seen in FIG. 5, the switching levers 36, 37 pivot radially inward or outward about the pivot axes 41, 42. As shown in FIG. 8, the inward turning position is such that when the control roller 35 moves along the outer groove flank of the slot guides 38, 39, the switching protrusion 29 of the switching claw 27 is lifted from the respective detent recesses 31, 32. Selected as Accordingly, the switching protrusion 30 then engages with the detent recesses 33 and 34. In order to move the switching claw 27 in the opposite direction against the force of the bistable bias device 35a, the control roller 35 moves on the inner groove flank of the slot guides 38 and 39.

  In order to operate the switching levers 36, 37, a cam drive 43 shown in FIG. 5 is provided, which is coupled to the input shaft 12 and has, for example, two cams. The two cams and the cam follower lever 44 are connected. This lever is formed as a bell crank lever and actuates the switching levers 36 and 37 via a selector finger 45 acting as a control coupling device 46. The selector finger 45 is driven by vertical vibration by the cam follower lever 44. Therefore, the free end 47 of the switching lever 36 or the free end 48 of the switching lever 37 is operated depending on the turning position. In such a situation, each end 47 or 48 is pushed downward while the deflection movement of the cam follower lever 44 continues. In order to set the swivel position of the selector finger 45 as desired on either side, contact members 51 and 52 that limit the selector finger 45 to that position are provided. When the control magnet 52a is actuated to perform its control function, the selector finger 45 is pulled and maintained by the control magnet 52a against the contact member 52 against the force of the compression spring 52b. Otherwise, the compression spring 52b pushes the selector finger 45 against the abutment member 51 and holds it there.

  While the disk 21 rotates constantly, the disk 22 rotates and vibrates as described above. For this purpose, a cam follower 53 (FIG. 5) connected to the disk 22 is provided. The cam follower 53 is a roller held at the end of a lever that is firmly fixed to the disk 22. The cam follower 53 is operated by a cam disk 54. This disk rotates at, for example, twice the rpm of the input shaft 12 and has a single protrusion. In this way, two longitudinal vibrations are applied to the disk 22 for each rotation of the input shaft 12.

  The shaft drive 2 operates as follows.

  First, it is assumed that the eccentric portion 17 performs a constant rotation. For this purpose, the switching claw 27 must always connect the disk 21 to the eccentric part 17. In order to realize this effect, when the switching claw 27 passes by each switching lever as the disk 21 rotates, the switching lever 36 and the switching lever 37 must move outward in each case. For this purpose, the selector finger 45 pushes the end 47 downward when the switching claw 27 passes by the switching lever 36 and the selector finger 45 pushes the end 48 when the switching claw 27 passes by the switching lever 37. The control magnet 52a is controlled so as to push downward.

  The switching surfaces 38, 39 of the switching levers 36, 37 extend over an angular range that is considered a switching range. The cam follower 53 forms a vibration drive 55 together with the cam disk 54. The vibration drive gives the disk 22 a rotational vibration motion that is synchronized with the motion of the disk 21 whenever the switching claw 27 passes through the switching range. These movement stages are characterized by the cam of the cam drive 43 moving outside the end of the cam follower lever 44.

  By preventing the respective switching levers 36 or 37 from moving outward, the clutch device 16 is switched during the phase of the synchronous movement of the disks 21 and 22. Thus, for example, the switching projection 29 is pushed from the detent recess 31 while the switching projection 30 engages with the detent recess 33. Each switching lever 36 or 37 becomes active by holding the switching lever 36 or 37 in the inner position by springs 56 and 57, for example, and does not move outward by the selector finger 45. In this state, since the eccentric portion 17 is coupled to the disk 22, it performs only the longitudinal vibration motion. A few degrees (eg 10 °) of longitudinal vibration movement causes only a slight (up to several millimeters) vertical movement of the heald shaft at the upper and lower inverted positions of the heald shaft. Such movement does not interfere with the shed formation and knitting process. However, due to the fact that only the respective switching levers 36, 37 on which the switching pawl 27 is placed pivot outward, a new synchronized switching is possible. The cam drive 43 generates this at the moment when the two disks 21 and 22 are synchronized, so that the eccentric part 17 is restarted softly and without impact.

  The bias device 35a applies a bias to the switching claw 27 at two stable positions. FIG. 8 shows an embodiment in which the push rod 60 is engaged with the arm of the switching claw 27 and held by the counter support 61. The counter support is connected to the bearing of the pin 28 so that it can rotate and not move, and is therefore provided, for example, in the eccentric part 17. A spring 62 such as a compression spring provided on the push rod 62 engages with the counter support 61 at one end, and engages with a washer 63 fixed to the push rod 60 at the other end. The push rod 60 is connected to the switching claw 27 by a joint 64. The counter support 61, the joint 64, and the pin 28 are arranged so as to pass through an extended position when the switching claw 27 and the push rod 60 move through the turning range of the switching claw 27. This extended position constitutes a dead center position. The switching claw 27 has a stable engagement position on either surface of the dead center position. At one of the engagement positions, the switching protrusion 29 engages with the detent recess 31, while at the other stable position, the switching protrusion 30 engages with the detent recess 33. In this way, the switching claw 27 reliably maintains the connection position assigned thereto by the control roller 35. The switching claw 27 may be a rigid part as shown in FIGS. 8 and 9, or a two-piece part as shown in FIG. In either case, the switching claw 27 is switched to the respective stable switching positions determined in advance by the bistable bias device 35a by the switching levers 36 and 37.

  FIG. 10 shows another modification in which the shaft drive uses the switching claws 27a and 27b. Similar to the switching claw 27 described above, these switching claws are held by the pins 28a and 28b so as to be pivoted to the eccentric portion 17, respectively. Each switching claw 27a, 27b carries only one switching projection 29, 30. In this way, the switching claw 27a is coupled to the disk 21 and the switching claw 27b is coupled to the disk 22. The switching claws 27a and 27b are biased toward the detent position by a spring such as a lap spring 35b shown in FIG. The switching claw 27 a is engaged with the disk 21. The switching claw 27b is detached from the disk 22. In order to move the switching pawls 27a, 27b from the detent position, the switching levers 36, 37 are more precisely their arcuate switching surfaces 38a, 38 instead of the slot guides 38, 39 of the switching device shown in FIG. 39a is provided.

  In embodiments where separate switching pawls 27a, 27b are used, the desired switching pawl 27a or 27b engages regardless of how fast each other switching pawl 27a or 27b reaches the release position.

  As shown in FIG. 12, the switching claws 27 a and 27 b may be operated by slot guides 38 and 39. For this purpose, switching claws 27a, 27b according to FIG. 11 and switching claws according to FIG. 13 are used. Furthermore, as shown in FIG. 10, the switching claws 27a and 27b may turn in the same direction. As described above with reference to FIG. 8, the switching claws 27a and 27b according to FIG. 13 each include a bistable bias device 35a. Therefore, the description also applies to this example.

  The switching claws 27a, 27b are operated by a switching lever 36, 37 or a slider 65 in which slot guides 38, 39 are formed. The slider 65 is supported, for example, so as to slide in a selected radial direction with respect to the rotating shaft 24 and is operated by a control cam 66 as shown in FIG. The slider 65 guarantees synchronous switching of both switching claws 27a, 27b so that erroneous switching is avoided even at high switching speeds.

  Further, a holding magnet 67 may be coupled to the slider 65 in order to maintain the slider 65 in the end position.

  The new shaft drive allows individual heald shafts to be switched on and off even at high operating speeds. For this purpose, a switching claw is provided that couples the eccentric to a disk that rotates permanently and / or oscillates back and forth. A means for improving the controllability of such a clutch device is control of the switching claw by a slot guide. The slot guide couples the bistable biasing device to the switching claw and / or divides the switching claw 27a, 27b into the switching claw 27a, 27b coupled to the discs 21, 22 which operate differently. Preferably, one of the two discs has a continuous rotational motion, while the other disc only has a vibrating motion that determines the heald shaft motion during its stationary phase.

FIG. 6 is a schematic view of a heald shaft coupled to a mechanical shaft drive. FIG. 4 is a time function diagram for different courses of heald shaft motion at different stages of motion. FIG. 4 is a time function diagram for different courses of heald shaft motion at different stages of motion. FIG. 2 is a schematic plan view of the shaft drive shown in FIG. 1. FIG. 2 is a schematic partial view of the shaft drive shown in FIG. 1. FIG. 2 is a partial perspective view of a slot guide of the shaft drive according to FIG. 1. FIG. 6 is a partial schematic view of different scales of a shaft drive according to FIG. FIG. 5 is a partial view of the shaft drive according to FIGS. 1 to 4, showing a switching claw and a bistable bias device connected thereto. FIG. 5 is a schematic view of a shaft drive having a switchable cam disk, a bistable switching claw and a slot guide. FIG. 6 is a schematic view of a shaft drive having two single projection switching claws. FIG. 11 is a partial view of the shaft drive of FIG. 10 showing one of the single projection switching pawls. FIG. 5 is a schematic view of a shaft drive having two single projection switching claws and a slot guide. FIG. 13 is a partial view of the shaft drive of FIG. 12 showing a bistable single projection switching pawl. FIG. 14 is a schematic view of a shaft drive and actuating slider with two single-projection bistable switching pawls according to FIG. 13.

Explanation of symbols

1, 1a, 1b Held shaft 95 Held 2 Shaft drive 3 Arrow 4 Driven device (for example, coupling device)
5, 6 Position 7, 8 Bell crank lever 9 Push / pull rod 11 Rocker 12 Input shaft 13 Arrow 14 Rotation drive device 15 Gear 16 Clutch device 17 Eccentric part 18 Connecting rod 21, 22 Input element / disc 23 Arrow 24 Rotating shaft 25 Arrow 26 switching member 27 switching claw 27 ', 27''switching claw arm 27a, 27b switching claw 28, 28a, 28b pin 29, 30 switching projection 31, 32, 33, 34 detent recess 35 control roller 35a Bias device 35b Lap spring 36, 37 Switching lever 38, 39 Slot guide 38a, 39a Switching surface 41, 42 Rotating shaft 43 Cam drive 44 Cam follower lever 45 Selector finger 46 Control coupling device 47, 48 End 51, 52 Control magnet 52a Control Magnetism 52b Compression spring 53 Cam follower 54 Cam disc 55 Vibration drive 56, 57 Spring 60 Push rod 61 Counter support 62 Spring 63 Disc 64 Joint 65 Slider 66 Control cam 67 Holding magnet B Motion stage C Controller TO, TU Reverse position, Reverse point BTO Reverse position area t Time R Resting phase S Synchronization phase

Claims (21)

A follower coupled to the heald shaft (1), wherein the at least one follower is connected to the heald shaft to maintain the heald shaft (1) in a stationary phase (R) and to impart a motion phase (B) to the heald shaft A device (4);
A control device (C) for controlling the actual speed of the driven device (4), thereby controlling the speed of the heald shaft (1);
A clutch device forming part of the shaft drive (2), the clutch device (16) arranged between the drive device (14) and the gear (15) for transmitting drive movement to the heald shaft (1); A shaft drive for at least one heald shaft (1) of a loom having
The clutch device (16) includes a first drive disk (21) connected to the drive device (14), a second drive disk (22), and at least one switching claw (27). A driven disk (17) selectively coupled to the two-drive disk (22);
A shaft drive characterized in that the switching pawl (27) is held by a bistable biasing device (35a) for moving back and forth between two stable positions. A follower coupled to the heald shaft (1), wherein the at least one follower is connected to the heald shaft to maintain the heald shaft (1) in a stationary phase (R) and to provide a motion phase (B) to the heald shaft. A device (4);
A control device (C) for controlling the actual speed of the driven device (4), thereby controlling the speed of the heald shaft (1);
A clutch device forming part of the shaft drive (2), the clutch device (16) arranged between the drive device (14) and the gear (15) for transmitting drive movement to the heald shaft (1); A shaft drive for at least one heald shaft (1) of a loom having
The clutch device (16) includes a first drive disk (21), a second drive disk (22), and a first switching claw (27a) or the first switching claw (27a) connected to the driving device (14). A shaft drive comprising a driven disk (17) selectively connected to the first drive disk (21) or the second drive disk (22) by a second switching claw (27b) arranged at a distance. . Switching pawl (27) is biasing means (35a) by a shaft drive of claim 1 or 2, characterized in that it is held come under Oite bias in one of the stable positions.   3. A shaft drive according to claim 1 or 2, characterized in that the switching pawl (27) is held by a bistable biasing device (35a) for back and forth movement between two stable positions.   3. The switching claw (27) can be moved back and forth between an engaged position and a released position by an actuating element (36, 65) having a slot guide (38). Shaft drive.   6. A shaft drive according to claim 5, characterized in that the slot guide (38) engages the switching claw (27) only at a selected rotational position of the drive device (14).   6. The shaft drive according to claim 5, wherein the actuating element (65) is an actuating slider.   3. Shaft according to claim 1 or 2, characterized in that the drive device (14) imparts a unidirectional movement to the first drive disk (21) and an alternating movement is imparted to the second drive disk (22). drive.   3. A shaft drive according to claim 1 or 2, characterized in that the driven device (4) performs a predetermined movement also during the stationary phase (R).   3. The shaft drive according to claim 1, wherein the predetermined movement in the stationary phase (R) is determined by the control device (C).   3. A shaft drive according to claim 1 or 2, characterized in that, at the beginning of the stationary phase (R), the driven device (4) has an acceleration equal to the acceleration at the end of the motion phase (B).   3. A shaft drive according to claim 1 or 2, characterized in that at the beginning of the movement phase (B), the driven device (4) has an acceleration equal to the acceleration at the end of the stationary phase (R).   3. A shaft drive according to claim 1 or 2, characterized in that the driven device (4) performs an oscillating movement during the stationary phase (R). The first drive disk (21) and the second drive disk (22) are driven synchronously and the switching of the clutch device (16) is performed during the synchronization phase. Shaft drive.   3. A shaft drive according to claim 1 or 2, characterized in that the second drive disk (22) is connected to a vibration drive (55) that imparts vibrational motion to the second drive disk (22).   The switching claw (27) is permanently connected to the eccentric part (17) and selectively connected to the first drive disk (21) or the second drive disk (22). The described shaft drive.   16. The rotary vibration movement of the second drive disk (22) at the switching position predetermined by the actuating element (36, 37) is synchronized with the rotary movement of the first drive disk (21). The described shaft drive.   At least one switching lever (36, 37), wherein the actuating element (36, 37) is coupled with the switching claw (27) to engage or disengage the switching claw (27) in at least one predetermined switching position. The shaft drive according to claim 5, wherein the shaft drive is formed by:   3. The shaft drive according to claim 1, wherein the switching claw (27) is connected to the driven disk (17) and rotates therewith.   20. Drive according to claim 5 or 19, characterized in that the actuating element (36, 37) is connected to the cam drive (43) via a control coupling device (46).   In order to activate and deactivate the actuating elements (36, 37) by means of the cam drive (43), the selector coupling (46) is held by the control coupling (46) so as to move between at least two positions. The shaft drive according to claim 20, characterized in that the selector finger (45) can be moved by a combination of a control magnet (52a) and a compression spring (52b).

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