SU759779A1 - Chain transmission - Google Patents

Description

one

The present invention relates to the field of engineering and can be used in the national economy.

The known chain drive, containing the drive and driven sprockets and the chain covering them [1].

The disadvantage of this transmission is the uneven movement of the chain and the variability of the gear ratio, which causes dynamic loads and reduces the service life of the chain transmission.

Closest to the invention to the technical nature of the chain 15 transmission, containing the leading and driven sprockets, covering their chain, guides and tensioning device [2).

20

The disadvantage of transmission is the uneven movement of the chain and the inconstancy of the gear ratio, which causes dynamic loads and reduces the service life of the chain transmission.

The aim of the invention is to improve the smoothness of the transmission.

This goal is achieved by the fact that the tensioning device is made in 30

2

the form of bypass rollers., leading and driven sprockets are located between the latter, and the guides are installed on the sprocket engagement sections on the inner and outer sides of the chain.

The guides are made in the form of rollers.

FIG. 1 shows a chain drive with flat guides, a general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a diagram with guides in the form of rollers; in fig. 4 is a view along arrow B in FIG. 3.

The transfer contains the leading 1 and the driven 2 sprockets, the driving chain 3, the tensioning device 4, made in the form of bypass rollers 5 and 6, and the guides 7.

Chain transmission works as follows.

When the drive sprocket 1 rotates, the movement to the driven sprocket 2 is transmitted by the chain 3, and the straight chain sections 3 are supported by the guides 7. The bypass rollers 5 and 6 can adjust the chain tension.

3,759779

In the case of rectilinear motion of the leading Even, the radius of the hinges

' one . C.O84.

where I, - the radius of the hinges;

* - the angle between the leading radius

and perpendicular to the leading branch changes from 1C / 1 to -Ϊ / ,;

ϊ · ι - the number of teeth of the leading sprocket.

Chain speed

where (V, is the constant angular velocity of the leading sprocket.

Since And, is a constant value,

then at a constant angular velocity of the drive sprocket, the speed of the chain is also constant.

Ia driven sprocket hinge radius

^to g co8 (b '

where is the radius of the initial circle of the driven sprocket;

- the angle between the driven radius · and the perpendicular to the leading branch varies from + ¾ / 2 to • 4e / 2 _g ?

2 _g - the number of teeth driven sprocket.

four

Angular velocity driven sprocket _and . Y ·. . . shl

^r 't ^ soar "' i _r constant, therefore a constant and gear ratio.

5 The proposed design of the chain transmission eliminates the effect of a step on its speed, increases the smoothness of work, reduces dynamic loads and thereby increases its service life.

Yu

Claims (2)

Claim 1. A chain drive containing a drive and driven sprocket, a chain that covers them, guides and tensioners 15 device, characterized by the fact that, in order to increase the smoothness of the transmission, the tension device is made in the form of bypass rollers, the drive and driven sprockets 20 are located between the latter, and the guides are installed on the sprocket engagement sections of the sprockets on the inner and outer sides of the chain. 2. Transfer of pop. 1, which is different from the fact that, in order to reduce the strength of the trenya chain links, the guides are made in the form of rollers.