Patent ID: 7998009
Filing Date: 2011-08-16
Classification: B60K,F16H

Abstract:
1. A mechanical and hydraulic composite transmission device, comprising an engine ( 2 ), a variable displacement hydraulic pump ( 5 ) and a hydraulic motor ( 18 ), wherein the engine ( 2 ) is connected with and drives a planetary gear case ( 17 ), a planetary gear mechanism of the planetary gear case ( 17 ) distributes power driven by the engine ( 2 ) to drive the variable displacement hydraulic pump ( 5 ) and a half shaft ( 27 ) respectively, the variable displacement hydraulic pump ( 5 ) is connected with and drives the hydraulic motor ( 18 ) and the half shaft ( 27 ) orderly, and the half shaft ( 27 ) converges a hydraulic power flow driven by the hydraulic motor ( 18 ) and a mechanical power flow distributed and driven by the planetary gear mechanism to export power; the engine ( 2 ) is connected with and drives a transfer shaft ( 15 ), a transfer gear ( 16 ) tightly covers and is fixed to a part of the transfer shaft ( 15 ) extending into the planetary gear case ( 17 ), and the transfer gear ( 16 ) engages with and drives a transition gear ( 29 ); the transition gear ( 29 ) is connected with a planetary carrier ( 33 ) coaxially and fixedly, two or three planetary shafts ( 31 ) are connected and fixed to the output end of the planetary carrier ( 33 ) vertically and equably, one planetary gear ( 30 ) covers each of the planetary shafts ( 31 ) respectively, and all the planetary gears ( 30 ) synchronously engage with and drive a sun gear ( 39 ) and internal teeth of a center gear ( 24 ); the center gear ( 24 ) is connected with and drives the half shaft ( 27 ), the sun gear ( 39 ) is connected and mounted to one end of a mean axis ( 38 ), and the other end of the mean axis ( 38 ) passes through the planetary carrier ( 33 ) and the transition gear ( 29 ), and extends out of the planetary gear case ( 17 ) so as to be connected with and drive the variable displacement hydraulic pump ( 5 ); the variable displacement hydraulic pump ( 5 ) is connected with and drives the hydraulic motor ( 18 ) via a hydraulic pipeline ( 28 ), the hydraulic motor ( 18 ) is connected with and drives a hydraulic drive shaft ( 35 ), and the other end of the hydraulic drive shaft ( 35 ) extends into the planetary gear case ( 17 ) to make a hydraulic drive gear ( 34 ) be connected and mounted to the other end of the hydraulic drive shaft ( 35 ), an assembling gear ( 32 ) covers one part of the half shaft ( 27 ), and the hydraulic drive gear ( 34 ) engages with and drives the assembling gear ( 32 ); the half shaft ( 27 ) converges a mechanical power flow driven by the center gear ( 24 ) and a hydraulic power flow driven by the hydraulic drive gear ( 34 ), and extends out of the planetary gear case ( 17 ) to export power, wherein said engine (