KR970075580A - Continuously variable transmission for vehicles - Google Patents

Abstract

An object of the present invention is to provide a continuously variable transmission for a vehicle capable of securing a wider range of speed change and improving durability by a simple structure; A torque converter that receives power from the engine and converts the torque into torque; A continuously variable transmission mechanism comprising a planetary gear set and disposed on an input shaft connected to a turbine runner side of the torque converter, for varying a reaction force of the reaction element to thereby effect a continuously variable transmission; A forward / reverse control mechanism which is composed of a planetary gear set and is connected to an output side end of the continuously variable transmission mechanism and includes a plurality of friction members, and forward and reverse are selected by selective operation of the friction members; The present invention provides a vehicular stepless speed change device comprising:

Description

Continuously variable transmission for vehicles

Since this is a trivial issue, I did not include the contents of the text.

FIG. 3 is a diagram for explaining an operation of a continuously variable transmission mechanism according to the present invention, using a lever analysis method; FIG. 3 is a schematic view of an embodiment of the present invention; FIG. 2 is a partial explanatory view of a continuously variable transmission mechanism applied to the present invention;

Claims (7)

A torque converter that receives power from the engine and converts the torque into torque; A continuously variable transmission mechanism comprising a planetary gear set and disposed on an input shaft connected to a turbine runner side of the torque converter, for varying a reaction force of the reaction element to thereby effect a continuously variable transmission; A forward / reverse control mechanism which is composed of a planetary gear set and is connected to an output side end of the continuously variable transmission mechanism and includes a plurality of friction members, and forward and reverse are selected by selective operation of the friction members; And the vehicle-mounted continuously variable transmission. The vehicular stepless transmission according to claim 1, wherein the continuously variable transmission mechanism comprises a single pinion planetary gear set and reaction force control means capable of variably controlling a reaction force component of the single pinion planetary gear set. 3. The single pinion planetary gear set according to claim 2, wherein the single pinion planetary gear set is a planetary carrier that supports a pinion that is connected to the input shaft integrally with the sun gear to act as an input element and meshes with the outer periphery at equal intervals of the sun gear, Wherein the ring gear engaged with the pinion is formed to act as a reaction force element in connection with the reaction force control means. 3. The vehicular automatic transmission according to claim 2, characterized in that the reaction force control means includes a worm gear integrally formed on one side or outer side of the ring gear, a worm engaged with the worm gear, and a forward and reverse motors driving the worm To-vehicle transmission. 2. The planetary gear set of claim 1, wherein the forward and reverse control mechanism comprises a double pinion planetary gear set; And a first and second friction members for controlling the two elements of the double pinion planetary gear set to act as input or output elements. The double pinion planetary gear set according to claim 5, wherein the double pinion planetary gear set includes a sun gear, a sun gear, and a sun gear, the sun gear being integrally connected to the rear end of the planetary carrier, the output element of the continuously variable transmission mechanism, And the ring gear meshing with the second pinion is connected to the planetary carrier and the transmission housing via the first and second friction members so as to act as an input element or a reaction force element Wherein the transmission mechanism is configured to transmit the transmission power to the transmission. The vehicular continuously variable transmission apparatus according to claim 5, wherein the first friction member uses a conventional multi-plate clutch as a clutch means, and the second friction member uses a normal band brake as a brake means. ※ Note: It is disclosed by the contents of the first application.