Belt Drive

Abstract

A belt drive is provided which includes a circulating belt ( 8 ) which is driven by at least one drive element ( 9 ) and which drives at least one driven element ( 10 ). At least one first tensioning device ( 20 ) acts upon the belt ( 8 ) in the slack strand and at least one second tensioning device acts in the tightened strand. To prevent or reduce jumps and/or transverse oscillations of the belt ( 8 ), the second device ( 21 ) guides the belt ( 8 ) and at least one third device ( 22 ) which is arranged radially inside the belt drive, which is suitable, optionally, limits deviations of the belt ( 8 ). The second device ( 30, 40, 50, 60, 70, 80, 90, 100 ) also tensions the belt ( 8 ) in such a manner that it is subjected to a force (F 1 ) which is smaller than the force (F 2 ) which is oriented counter thereto during the operation of the belt ( 8 ) on the second tensioning device ( 30, 40, 50, 60, 70, 80, 90, 100 ).

1 . Belt drive, comprising a circulating belt means, which is driven by at least one drive element and which drives at least one driven element, at least one first tensioning device acting on the belt means in a region of the belt drive where the belt means leaves the drive element in its circulating direction and reaches a closest driven element, and at least one second device in a region of the belt drive where the belt means reaches the drive element in the circulating direction and leaves a closest driven element the second device is constructed for guiding the belt means and there is at least one third device, which is arranged in a radial direction inside the belt drive and which is also suitable for limiting excursions of the belt means. 
   
   
       2 . Belt drive according to  claim 1 , wherein the at least one third device is provided in a region of the drive element. 
   
   
       3 . Belt drive according to  claim 2 , wherein the at least one third device is provided in the region of the drive element where the belt means reaches the drive element in the circulating direction. 
   
   
       4 . Belt drive according to  claim 1  or  2 , wherein the at least one third device is provided in the region of the drive element where the belt drive leaves the drive element in the circulating direction. 
   
   
       5 . Belt drive according to  claim 1 , wherein the at least one third device is suitable for acting both in a region of the drive element where the belt drive reaches the drive element in the circulating direction and also in the region of the drive element where the belt means leaves the drive element in the circulating direction. 
   
   
       6 . Belt drive according to  claim 1 , wherein the at least one third device is arranged at a defined distance from an inside of the belt means. 
   
   
       7 . Belt drive according to  claim 1 , wherein the at least one third device is connected mechanically to at least one of the at least one first devices or to the at least one second devices. 
   
   
       8 . Belt drive according to  claim 1 , wherein at least one of the first, second or third devices is provided with a surface for reducing friction. 
   
   
       9 . Belt drive, comprising a circulating belt means, which is driven by at least one drive element and which drives at least one driven element, at least one first tensioning device acting on the belt means in a region of the belt drive where the belt means leaves the drive element in the circulating direction and reaches the closest driven element, and at least one second device in a region of the belt drive where the belt means reaches the drive element in its circulating direction and leaves a closest driven element the second device is also constructed for tensioning the belt means, such that the second device acts on the belt means with a force that is less than an opposite force acting on the second tensioning device during the operation of the belt means. 
   
   
       10 . Belt drive according to  claim 9 , wherein the force acting on the belt means is generated at least partially by a spring force. 
   
   
       11 . Belt drive according to  claim 10 , wherein the spring force is generated by at least one of a leg, spiral, leaf, or torsion spring. 
   
   
       12 . Belt drive according to  claim 9 , wherein at least one of the tensioning devices is provided with a surface for reducing friction. 
   
   
       13 . Belt drive according to  claim 9 , wherein the at least one second tensioning device has a guide body, which is acted upon with a force by at least one spring in a direction toward the belt means as well as with an opposite force during operation of the belt means. 
   
   
       14 . Belt drive according to  claim 1 , wherein the at least one second tensioning device has a deformable guide body or a guide body with a deformable surface. 
   
   
       15 . Belt drive according to  claim 14 , wherein the at least one second tensioning device has a guide body having a sliding coating constructed to be spring-elastic in a direction toward the belt means or the at least one second tensioning device has a guide body having a sliding coating that is pressed by a spring against the belt means, with the spring being arranged between the guide body and the sliding coating. 
   
   
       16 . Belt drive according to  claim 9 , wherein the at least one second tensioning device has a multiple-part guide body, whose individual parts are connected to each other in an articulated manner on facing ends thereof at a hinge point and wherein, at the hinge point, a spring attaches, such that a force is generated in a direction toward the belt means. 
   
   
       17 . Belt drive according to  claim 9 , wherein the at least one first tensioning device is activated by pressurized medium and is also acted upon with a spring force, which acts constantly on the belt means in the tensioning direction. 
   
   
       18 . Belt drive according to  claim 17 , wherein the at least one first tensioning device and the at least one second tensioning devices are connected to each other elastically by a spring, wherein the spring generates a spring force acting constantly on the belt means in a tensioning direction. 
   
   
       19 . Belt drive according to  claim 17  wherein the at least one first tensioning device and the at least one second tensioning device are connected to each other by a hinge mechanism, wherein the hinge mechanism is connected to a spring, which generates a force acting constantly on the belt means in the tensioning direction via the hinge mechanism. 
   
   
       20 . Belt drive according to  claim 19 , wherein the guide body of the at least first and second tensioning devices are each supported so that they can pivot in separate attachment points, the guide bodies are each connected in an articulated way at attachment points with a lever-like connection element, the connection elements are connected to each other so that they can pivot at a connection point, and the spring engages at the connection point, such that a basic contact force of the guide bodies acts on the belt means via the connection elements. 
   
   
       21 . Belt drive according to  claim 20 , wherein the connection elements and the spring are arranged in a radial direction inside the belt drive.