GB885553A

GB885553A - Power transmission mechanism

Info

Publication number: GB885553A
Application number: GB242660A
Authority: GB
Inventors: Wayne R Howard
Original assignee: Clark Equipment Co
Current assignee: Doosan Bobcat North America Inc
Priority date: 1960-01-22
Filing date: 1960-01-22
Publication date: 1961-12-28

Abstract

885,553. Clutch controls. CLARK EQUIPMENT CO. Jan. 22, 1960, No. 2426/60. Class 80 (2). [Also in Group XXIX] In a transmission comprising an hydrodynamic torque converter 21 connectible to a load by an hydraulically engageable multi-plate friction clutch 26, an input driven pump 80 supplies high-pressure liquid to a distributer 88 from which high-pressure liquid is supplied to the clutch 26 and low-pressure liquid is supplied to the torque converter. The torque converter, pump and distributer are enclosed in a stationary housing 20. The torque converter comprises an impeller 28 fast with an engine driven flywheel 22 and connected by gears 76, 78 to the pump 80, a turbine 30 fast with a shaft 24 connected to the input part of the clutch, and a stator 32 mounted on a stationary sleeve 68. A one-way clutch 64 is provided between the impeller and shaft 24. The pump 80 draws liquid from a sump 82 formed by the housing 20, and supplies liquid through a passage 112 to a high-pressure chamber 114 formed in the distributer 88. The pressure in chamber 114 is determined by a spring-loaded valve 122, and the chamber communicates, through a line 148 with a control valve 142 controlling supply and exhaust to a line 150 leading to the clutchactuating cylinder through a port 99 and passages 100, 102 in the shaft 24. Excess pressure in the chamber 114 urges the valve 122 upwardly to establish communication with a chamber 116 in the distributer block which communicates with inlet passages 94 leading to the torque converter as indicated by the solid line arrows in Fig. 1. The converter discharges between the turbine 30 and the stator 32 to the interior of the stationary sleeve 68, and thence through passages 95, 96 to a low-pressure chamber 118 of the distributer. The pressure in the chamber 118 is determined by a spring- loaded valve 124 and when the setting of valve 124 is exceeded it opens a passage between the chamber 118 and line 139 leading to a cooler 140 and thence to the sump 82.