SU1516674A1 - Variable gear train - Google Patents

Abstract

The invention relates to mechanical engineering. The purpose of the invention is to increase the reliability of a variable gear train. The peculiarity of the transmission is that the rotation is transmitted from the gear cone drum 2 with equidistant teeth 3 on its surface to the gear wheel 9, the gear wheel 9 of its own axis and rotation of the axis itself in a plane parallel to the generator of the drum 2. The transforming mechanism consists of a turning with a frame 11 of the intermediate shaft 10, on which the overrunning clutches 8 are mounted for rotation, satellite wheels 7 engaged with the sun wheel 5 rotating in the holder 4 and engaged with gear 6 mounted on the slots on the bucket shaft 12. The conversion mechanism sums up the complex movement of the gear wheel 9 into one-sided rotation of the driven shaft 12 and allows the gear wheel 9 to move along the generator of the tapered drum 2, changing the gear ratio of the entire gear. In the transmission, mechanisms can be used to synchronize the rotation of the gear 9 in accordance with the position of the tooth 3 of the drum 2 at the time of engagement and to ensure that the rolling friction is engaged instead of the current sliding friction. 3 il.

Description

on the driven shaft 2, the Transforming mechanism summarizes the complex movement of the gear wheel 9 into one-sided rotation of the driven shaft 12 and allows the gear wheel 9 to be moved along the generator of the tapered drum 2 with the gear ratio of the whole gear. gear 9 in accordance with the position of the tooth 3 of the reel 2 at the time of engagement and to ensure in friction the rolling friction instead of the actual sliding friction „3 or about

The invention relates to mechanical engineering and can be used in gears with variable gear ratios.

The purpose of the invention is to increase the reliability of a variable gear train by applying a conversion mechanism that summarizes the rotation of the slave element.

FIG. 1 shows a variable gear transmission, a longitudinal section; FIG. 2 is a view A of FIG. 1j n fig, 3 - scan cone drum with the arrangement of the teeth o

The variable gear transmission includes a housing 1, the leading element in the form of a tapered drum 2 with a vertex angle of 60 ° jHa whose surface is equidistantly located on tooth 3 so that one of them coincides with the generator of drum 2, a transforming mechanism consisting of a yoke 4 fixed in the housing 1 .. with the possibility of a linear movement parallel to the generator of the drum 2, placed in it with the possibility of rotation around its axis of the sun wheel 5, hooked by one toothed crown with gear 6 and another toothed crown with a toothed stake satellites 7, which are connected via overrunning clutches 8 to a gear wheel 9 engaged with the teeth 3 of the reel 2; The satellite wheels 7 and the gear 9 are rotatably mounted coaxially with the sun wheel 5, and the gear 6 is connected to the clip 4 and mounted on the splines on the driven shaft 12, located parallel to the generator of the drum 2.

Variable gear transmission works as follows.

The rotation from the drive (not shown) is transmitted to the cone drum 2 and through the tooth 3 to the gear wheel 9 o

Since, as the drum 2 rotates, the teeth 3 pass through the point hooked each at its own angle, and, in turn, change the angle by 180 per revolution, the gear wheel 9 rotates around its axis either in one direction or the other. and with the axis.

This complex movement of the gear wheel 9 is further converted by overrunning clutches 8, satellite wheels 7, sun gear 5 into one-sided rotation of gear 6 with the driven shaft 12.

When moving the yoke 4 along the generatrix of the tapered drum 2 to a different position, the position of the gear wheel 9 relative to the tapered drum 2 changes, the number of teeth 3 interacting with the gear wheel 9 changes during one revolution of the drum 2, and therefore the gear ratio

To reduce the load on the teeth of the gear wheel 9, the gear unit can be equipped with a synchronizing device in the form of a conical or worm gear pair, allowing the frame 11 with the intermediate shaft 10 to rotate in the holder 4, so that the gear wheel 9 is at any moment of engagement parallel to the tooth 3 corps drum 2

In order to ensure that the friction roller engages (instead of the inefficient sliding friction), the tooth 3 on the tapered drum 2 can be made in the form of a number of rotating rollers,

Claims (1)

55 claims Variable gear transmission, comprising body, element. five A driven shaft with a gear and a converting mechanism, characterized in that, in order to increase reliability, the driving element is made in the form of a conical drum with a top angle 60, on the surface of which the tooth is equidistantly arranged so that one of them coincides with the generator of the drum, the converting mechanism is made in the form of a cage fixed in the body with the possibility of linear movement parallel to the generator of the drum placed in it with the possibility of rotation of its scaffolding meshed with one gear ring with bristles and another gear ring with satellite gear wheels which are connected via overrunning clutches to the gear wheel hooked to the drum teeth, the satellite wheels and gear wheel are rotatably mounted on the intermediate shaft fixed in the frame which is located in the cage rotatably coaxially with the sun wheel, and the gear is connected to the cage and mounted on the splines on the driven shaft, which is parallel to the generator of the drum FIG. 2 / J