DD215833A1 - CONVEYOR FOR TIMING BELTS - Google Patents

Abstract

The traction mechanism for toothed belt is particularly suitable for the transmission of high speeds and high torques and for fine positioning. The aim of the invention is the reduction of the running noise and the reduction of the angular transmission errors. The object of the invention is the design change of the drive and driven pulley and the toothed belt of a traction mechanism. According to the invention, the object is achieved in that the drive and driven pulleys for reducing the running noise and reducing the rotational angular transmission deviations consist of partial disks which are rotated in the same direction of rotation by an axis-wise different angle alpha. In this case, the axial sequence of the part discs arbitrarily, but must be the same on the drive and output axis.

Description

Traction mechanism for toothed belt

Field of application of the invention.

The invention relates to a traction mechanism for toothed belts, particularly suitable for the transmission of high speeds and ^: high torques and for Feinpositäönierung.

Characteristic of the known technical solutions

Known traction mechanisms for toothed belts generate a disturbing running noise, which increases with increasing speed and increasing torque.

From the literature (Bulletin of the ISM-14/1371, H. 75, 3. 391 to 1007) is known that the noise can be reduced by dividing a wide toothed belt into several narrow. In this case, however, only the contact surface between the head of the drive or driven pulley and the gap bottom is broken down into several sub-areas, but still effective at the same time.

Furthermore, a traction mechanism with toothed belt due to the polygon effect with an average. the toothed attack frequency fluctuates the gear ratio, which is particularly significant in the case of positioning drives with high

claims to the genzigkeit adversely affects.

Measures to eliminate or reduce this polygon effect are not known.

Object of the invention '<' '-

The aim of the invention are the reduction of the running noise and the reduction of the rotational angle transmission deviations in traction mechanisms for toothed belts.

Explanation of the essence of the invention

The object of the invention is to change the design of the drive and driven pulley and of the toothed belt of a pulley transmission. , '

According to the invention, the object is achieved in that drive output pulley .and ge for 'reducing the running intoxication and reducing Drehwinkelübertragungsabvveichungen OUT_ _a. Axis at a different angle (in the same Χ- Drensinn consist mutually twisted Teil'scheiben this case, the axial ranking the However, this must be done arbitrarily around the axis-wise different 'angle o' relative to one another

.on the drive and output axes. , ,

     , - '·

embodiment

The invention will be explained in more detail below with reference to an exemplary embodiment. ···. -In the accompanying drawing show:

FIG. 1: a side view of a belt drive for toothed belts

Fig. 2 is a plan view of the Zugmit telco t actuating drive for timing belt ⁿ _a ch Figure 1 showing the Teilscheiben-.

.Fig. 3: Representation of the Vs / incelso ^

The traction mechanism according to Fig. 1; 2 consists for example of a drive axle 1 and an output shaft 2. On the drive axle 1, the part discs 3; 31; 32 and on the output shaft 2, the part discs 4; 41; 42 arranged such that the part discs in each case in the same direction of rotation about the axis-wise different angle c <twisted

The angle <s <is given by the relationship OC = ~ 1- _t where ζ is the respective number of teeth of the part disc 3 or 4 and η is the number of part discs *

In the embodiment, the rotated by the angle oC part discs 3; 31; 32 and 4, respectively; 41; 42 from inside or outside starting on the corresponding axis 1; 2 ranked.

By the axis-wise rotation of the dividing disks around the . Angle . OC Mira achieves that impaction of the timing belt base on the tooth head is part disk. the individual, partial transmissions temporally offset wire and · a.Verminderung, the noise level occurs.

In addition, the dominant frequency in the noise echo increases after the relationship f = > - - ^{: =} -, which has an advantageous effect for additional encapsulation of the transmission, since the noise-reducing effect of capsules increases with increasing frequency. , ; , , :

Furthermore, by the rotation of the individual partial disks by the angle ^, a reduction of the periodic fluctuations in the transmission ratio resulting from the polygon effect occurs by approximately the factor η.

Claims (2)

invention claim , 1. -Tags gearbox for timing belt, consisting of split and toothed drive and driven pulleys for two. or several timing belts, characterized in that the dividing discs (3; 31; 32 and 4j.41; 42) 'axis-wise to each other in the same direction of rotation by a different angle. the angle of rotation and reduction of the angular velocities are twisted ', the angle c being equal to the quotient of the angle of the full circle (350) to the product of the number of slices (n) with the number of teeth (e.g. ) of the corresponding part disc (3; 31; 32 and 4; 41; 42). '. 2 Traction mechanism, characterized by jPunkt K 1 'characterized in that the partial plates (3; 31 ;. 32 and'4;41; 42). Achsanvveise, any · twisted to each other but on the drive unit (1) and the drive axle (2) arranged sine » ™ ι For this: & pages Zeidiriuncien