Patent Application
20080083472
The gear mechanism 7 is configured as a bevel gear transmission. It has a crown wheel 10 that is non-torsionally connected with the shaft arrangement 8. Said crown wheel meshes with a pinion 11 that is non-torsionally connected with the drive shaft 6.
Preferably two bearing arrangements 12, 13 are provided for supporting the shaft arrangement 8. These bearing arrangements are preferably configured as rolling bearings that are arranged in appropriate walls 14, 15 of the transmission frame 9, said walls preferably being aligned parallel to each other. The bearing arrangement 12 is preferably configured as a ball bearing, while the bearing arrangement 13 may preferably be a needle or roller bearing. Whereas the bearing arrangement 14 in the essentially flat wall 15 may be arranged so as to terminate flush on both sides, the wall 14 has a tubular flange 16 preferably projecting in the direction toward the crown wheel 10, said tubular flange bearing on its end facing the crown wheel 10 the ball bearing of the bearing arrangement 12. In so doing, the bearing arrangement 12 secures the axial position of the shaft arrangement 8 and thus of the crown wheel 10 and, therefore, defines the gear play of the gear mechanism 7.
As illustrated by
The drive section 17 is screwed to the crown wheel 10. As shown by
The cam support section 18 of the shaft arrangement 8 supports on its outside circumferential surface a package 28 of at least one, preferably several, cam disks 29 to 29i, whereby these may be seated on a common support sleeve 30 in order to form a package. These cam disks are disposed to drive the rocker 4, as well as the additional rockers 4a through 4l. With the exception of the optionally individual form of the cam disks 29 or 29a through 29i, the transmission arrangements consisting of the respective cam disks 29 through 29i and the rockers 4 through 4l are analogous.
As shown by
The cam support section 18 of the shaft arrangement 8 is preferably a shaft with a central hollow-drilled shaft which extends through the bearing arrangement 13. This section may bear an internal ring 37, whereby the roller elements of the bearing arrangement 13 roll on said internal ring's exterior circumference. The internal ring 37 can be seated with minimal or no play, however in an axially shiftable manner, on the cam support section 18 and come into abutment with a radial collar 38 of the cam support section 18.
The other end of the cam support section 18 is connected to the drive section 17. To do so, said end is preferably conical, so that a cone 39 is formed. This cone fits into a conical cutout 40 on the end of the drive section 17, said end being located away from the crown wheel 10 and—viewed from the perspective of the crown wheel—beyond the bearing arrangement 12. The cone 39 and the cutout 40 are arranged coaxially relative to the axis of rotation 20 and form the clutch arrangement 19 that is configured as a cone clutch or as a tapered shaft connection. In engaged state, it results in a non-torsional and non-bendable connection of the drive section 17 and the cam support section 18 to each other. The cone clutch has the advantage that it can be connected, i.e., engaged, in any position of rotation of the drive section 17 relative to the cam support section 18. If a specific position of rotation is to be pre-specified, it is also possible to provide a positive connection, which permits engagement only in a specific position of rotation.
In order to secure the cam support section 18 and the drive section 17 to each other a suitable locking means 41, for example, in the form of a locking bolt 42 may be provided, said bolt extending through the central bore of the cam support section 18 and into a tapped blind hole 43. The bolt 42 is tightened in the tapped blind hole 43 so that said bolt's head 44 exerts an axial pressure on the cam support section 18, thereby clamping the cone 39 in place in the cutout 40.
The embodiment in accordance with
Alternatively, as illustrated by
The in-so-far described shaft transmission 3 operates as follows:
During operation, the drive shaft 6 rotates the shaft arrangement 8 via the gear mechanism 7 and, with said shaft arrangement, the cam disks 29 through 29i. Accordingly, the rockers 4 through 4i perform rocking motions that are transmitted to the corresponding heald shafts.
If the motion of one or more heald shafts is to be changed, the package 28 is exchanged. To so, the machine is stopped and the hood of the shaft transmission 3 is removed. Thereafter, the bolt 44 is released. If the cone 39 should become stuck in the cutout 40, it is loosened. This is done with a suitable push-type ejection means. For example, the through-bore of the cam support section 18 may be provided with an internal thread into which a bolt may be screwed, said bolt coming into abutment with the tapered smooth end at the bottom of the tapped blind hole 43. Alternatively, push-type ejection screws may be inserted into one or more tapped holes that extend parallel to the central bore through the cam support section 18. Additional options for releasing a conical connection are familiar to the person skilled in the art.
After releasing the conical connection and thus the clutch arrangement 19, the cam support section 18 can be pulled axially out of the bearing arrangement 13. As a result of this, the package 28 is freed and can be laterally moved in one piece out of the intermediate space between the walls 14, 15.
Referring to the exemplary embodiment illustrated by
A shaft transmission 3 for a weaving machine comprises a shaft arrangement 8 that supports, on one end, a crown wheel 10 in order to drive the shaft arrangement 8. The shaft arrangement 8 is supported by means of two bearing arrangements 12, 13, between which a package 28 comprising the cam disks 29 through 29i is non-torsionally held on the shaft arrangement 8. The part 18 of the shaft arrangement 8, which supports the package 28, is connected with the remaining part 17 of the shaft arrangement 8 via a clutch arrangement 19 that represents a separating point. The clutch arrangement 19 is configured, e.g., as a frictional clutch with a cone 39 and an appropriate cutout 40, and is secured, in connected state, by means of a locking means 41 that is to be actuated from one end of the shaft arrangement 8. For disassembly and replacement of the package 28, the connection can be released and the cam disk section 18 can be removed from the shaft transmission 3, while the drive section 17 remains in the shaft transmission 3. Consequently, the package 28 can be exchanged as a whole, without requiring the disassembly of the gear drive that drives the shaft arrangement 8.
It will be appreciated that the above description of the present invention is susceptible to various modifications, changes and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 06021001.0 | Oct 2006 | EP | regional |
