초록 ▼

A reverser system for the feeder chain of a combine harvester comprises a hydraulic motor mounted on a slide and operated by a cylinder to move from a retracted position to a forward operating position. In the operating position the mechanical coupling connects the shaft of the hydraulic motor to a

A reverser system for the feeder chain of a combine harvester comprises a hydraulic motor mounted on a slide and operated by a cylinder to move from a retracted position to a forward operating position. In the operating position the mechanical coupling connects the shaft of the hydraulic motor to a drive sprocket connected to the feeder chain. Hydraulic fluid to the cylinder and to the hydraulic motor is tapped from the lift cylinders of the combine from a solenoid operated diverter valve. A control unit controls the supply of the pressurized fluid to the cylinder while delaying the supply of fluid to the hydraulic motor so that the mechanical coupling is connected while stationary before the hydraulic motor starts. This arrangement can be provided by simple mechanical devices providing an inexpensive drive system.

대표청구항 ▼

A combine harvester comprising a combine harvester body including a feeder housing, a drive member for driving crop drive elements within the feeder housing and apparatus for reversing drive of the drive member for reversing the drive elements comprising a drive element for driving the drive member,

A combine harvester comprising a combine harvester body including a feeder housing, a drive member for driving crop drive elements within the feeder housing and apparatus for reversing drive of the drive member for reversing the drive elements comprising a drive element for driving the drive member, a support frame for attachment to the combine harvester body, a hydraulic motor mounted on the support frame for sliding movement relative thereto and having an output drive shaft, a hydraulic cylinder having one end attached to the support frame and a second end attached to the motor and arranged to move the motor in said sliding movement relative to the support frame in a direction longitudinal of the drive shaft thereof from a retracted position to an operating position, a mechanical drive coupling between the drive element and the output drive shaft for communicating drive from the output drive shaft to the drive element and including a portion thereof mounted on the output drive shaft movable with the motor and the output drive shaft so as to be released from communicating drive to the drive element in the retracted position and so as to communicate drive to the drive element in the operating position, connection means for connection to a source of hydraulic fluid under pressure and control valve means for receiving the hydraulic fluid and for directing the fluid to the cylinder and to the motor, said control valve means having a first port for receiving fluid from said connection means, a second port for communicating fluid to the cylinder, a third port for communicating fluid to the motor and a sequence valve arranged to prevent communication of fluid to the third port until the pressure of fluid within the body exceeds a predetermined pressure in response to movement of the cylinder to an extreme position thereof.