Patent ID: 6474218
Filing Date: 2002-11-05
Classification: F16H

Abstract:
A hydrostatic continuously variable transmission comprising:a cylinder block including a pump cylinder bore and a motor cylinder bore; a swash plate type hydraulic pump; a swash plate type hydraulic motor; a hydraulic closed circuit disposed between the hydraulic pump and the hydraulic motor; an output shaft press-fitted in said cylinder block for integrally combining said hydraulic pump with the hydraulic motor, said pump cylinder bore and said motor cylinder bore are formed in said cylinder block in parallel to the output shaft; diameters of back portions of the pump cylinder bore and the motor cylinder bore are larger relative to diameters of entry portions of the pump cylinder bore and the motor cylinder bore; and said output shaft being press-fitting in a predetermined portion of said cylinder block wherein said entry portion of said pump cylinder bore and the entry portion of the motor cylinder bore are not deformed during the press-fitting of the output shaft.