SU1733768A1 - Stepless transmission - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to continuously variable transmissions used in vehicle transmissions. The purpose of the invention is to enhance operational capabilities and improve operating conditions. The inferior transmission contains the leading 1 and the driven 2 shafts, the planetary gear 3, the variator 7, one link 15 of which is connected to the drive shaft 1, the other - invariably with two links 6 and 5 of the planetary gear 3, and an axially movable gear coupling 8 alternately connecting shaft 2, on which it is installed, and three elements 4,5, 6 of the planetary mechanism 3. The transmission is equipped with a switching device 10 connecting the variator 7, the movable coupling 9 and the two links 5 and 6 of the planetary mechanism by means of kinematic connections . 1 il.

Description

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The invention relates to mechanical engineering, in particular to continuously variable transmissions used, for example, in vehicle transmissions.

A stepless transmission is known, containing a drive and driven shaft, a planetary mechanism, a variator, one link of which is kinematically connected with the drive shaft, the second alternately with two links of the planetary mechanism, and an axially movable gear coupling. where it is installed, and the three elements of the planetary mechanism.

The disadvantage of this transmission is the increased complexity of the design due to the complicated planetary mechanism, performed by four-stage, as well as the complicated control mechanism, made in the form of hydraulically controlled clutches. In addition, this transmission does not provide direct transmission, which reduces its operational capabilities.

Also known is a stepless gear, containing a drive and driven shaft, a planetary mechanism, a variator, one link of which is kinematically connected with the drive shaft, the second alternately with two links of the planetary mechanism, and an axially movable gear coupling connecting shaft, on which it installed. and three elements of the planetary gear.

However, this transmission has a complicated design due to the increased complexity of the planetary mechanism, and also does not provide direct transmission, which limits its operational capabilities.

The purpose of the invention is to expand the operational capabilities and improve the operating conditions of the continuously variable transmission.

The goal is achieved by the fact that, in a continuously variable transmission of a gear, the clutch is mounted on the driven shaft, and the gear is provided with a switching device connecting the variator, the movable clutch and the two links of the planetary mechanism by means of kinematic connections.

The drawing shows a kinematic transmission scheme.

The inferior transmission contains the leading 1 and the driven 2 shafts, the planetary mechanism 3 including elements 4, 5 and 6, respectively, in the form of a central wheel with external teeth, a central wheel with internal teeth and drove with satellites, variable 7, one link of which with the drive shaft 1, two axially movable couplings 8 and 9. Coupling 8 is intended for alternately connecting elements 4, 5 and 6 of the planetary mechanism 3 with the driven shaft 2, coupling 9 for connecting the second link of the variator 7 with two links mi 5 and 6 plan container 3 mechanism.

The transmission is equipped with a switching device 10 connecting the variator 7 and two axially movable couplings 8 and 9.

The proposed fuzzless transmission provides three modes of operation.

The first mode, designed, for example, for technological movement of the vehicle on the reverse, is provided in the first position of the switching device 10. By changing the variable setting of the variator 7, the rotation speed of the driven shaft 2 is reversed in direction and smaller in magnitude to the speed of the driving shaft 1.

The second mode, intended, for example, for the technological movement of the vehicle on the go, is provided in the second position of the switching device 10 (shown in

scheme) By changing the variable speed of the variator 7, the rotational speed of the driven shaft 2 is changed, the same towards the speed of the driving shaft 1, but lower in magnitude.

And the third mode, designed, for example, for vehicle traffic on the go, is provided in the third position of the switching device 10.

the mechanism 3 from the work is turned off and the driven shaft 2 receives a speed equal to the speed of the drive shaft 1.

Thus, the installation of the coupling on the driven shaft the transmission supply with a switching device connecting the

CVT, clutch, provides enhanced operational capabilities of continuously variable transmission and improved conditions for its operation.

Claims (1)

Invention Formula A stepless transmission containing a drive and driven shaft, a planetary mechanism, a variator, one link of which is kinematically connected with a drive shaft, and two axially movable couplings, the first of which is intended for alternately connecting the elements of the planetary mechanism with the shaft, the second for alternately two links of the planetary mechanism with the second link the variator, characterized in that, in order to expand the operational capabilities and improve the operating conditions, the first axially movable coupling is designed to connect the elements of the planetary mechanism with the driven shaft, and the transmission is equipped with a switching device connecting the variator and two axially movable couplings.