Railway rolling stock – Trucks – Radial
Patent
1992-09-21
1993-12-14
Le, Mark T.
Railway rolling stock
Trucks
Radial
104 89, 104118, 105141, D01H 1326
Patent
active
052692280
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The instant invention relates to a travelling mechanism of an automatic service carriage for spinning or twisting machines whereby said automatic service carriage travels on a rail system to work stations and must travel over a curved track at the front of the machine so as to move from one side of the machine to the other.
The automatic service carriage is a self-contained assembly which must be positioned for technical reasons in one plane of movement at different locations of the textile machine. For this purpose the automatic service carriage is mounted on a running rail system. The running rail system, which consists of an outer and inner running rail is attached to the machine frame by means of supports. The automatic service carriage includes guide rollers attached to an extension bracket upon the inner running rail while the running and guide rollers of the automatic service carriage are guided on the outer running rail.
The configuration of the outer running rail system with moving gear determines the travelling attitude.
The moving gear of the automatic service carriage must therefore ensure precise guidance in relation to the work stations of the textile machine and also in travelling over curves on the outer curved track. Due to the relatively high speed as well as great weight and volume of the automatic service carriage, an unsteady transport movement is produced in curve travel.
In a known device a running wheel is rigidly installed on each of the two ends of the travelling gear of the automatic service carriage, whereby the fork of the running wheel is rotatably mounted by means of a spherical gudgeon. The formation of a wheel flange on each side of the running wheels is necessary in order to ensure true gauge in transport. Curve travel on the rail produces a high degree of sliding friction due to the different circumferential speeds of the two wheel flanges of a wheel, leading to spontaneously unsteady running and wear.
Another known development consists in equipping this running wheel with wheel flanges on both sides rotatably and independently of each other, facing the running wheel. However this solution avoids neither wear at the friction points nor spontaneous braking action.
Another device according to DE-OS 38 33 739 omits wheel flange elements on the running wheel. Three guide rollers with axles that are parallel to the guide axles of the running wheel are provided on the sides of the track in addition to the running wheel and are connected to the latter. It is a particularity of this arrangement that at least two guide rollers run in different radial planes on one edge of the curved track and that the curved track has two different radii. However, since at least two running wheels are still rigidly coupled together over a defined distance, sliding friction on the running wheels remains and sufficiently steady travel of the automatic service carriage is still not ensured.
OBJECTS AND SUMMARY OF THE INVENTION
It is an object of the instant invention to improve the travelling characteristics of the automatic service carriage as it travels on curves on a rail system of the textile machine so as to achieve a steady, continuous travelling motion of the automatic service carriage while avoiding sliding friction and spontaneous yaw of the running wheel.
Additional objects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
The automatic service carriage is provided with a travelling gear above the supporting rail with guiding rollers on its underside to hold the automatic service carriage on the rail. One moving gear is installed on each of the two edges of the travelling gear.
The moving gear contains the supporting wheel which is mounted in a movable
REFERENCES:
patent: 2549954 (1951-04-01), Zimmerman
patent: 4389943 (1983-06-01), Watatani
patent: 4398469 (1983-08-01), Zelli
patent: 4840022 (1989-06-01), Karl et al.
Mayer Walter
Tuschl Robert
Le Mark T.
Rieter Ingolstadt Spinnereimaschinenbau AG
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