초록 ▼

A hydraulic track tensioning circuit is connected to an idler wheel of a track drive mechanism to maintain a tension in a track proportional to the drawbar pull of the track drive mechanism. The tensioning circuit includes a variable pressure relief valve having a variable pressure setting controlle

A hydraulic track tensioning circuit is connected to an idler wheel of a track drive mechanism to maintain a tension in a track proportional to the drawbar pull of the track drive mechanism. The tensioning circuit includes a variable pressure relief valve having a variable pressure setting controller which controls the tensioning pressure in a supply line connected to a hydraulic tensioning cylinder in response to the highest pressure in a pair of motor ports of a reversible hydraulic drive motor operative to propel the track drive mechanism.

대표청구항 ▼

[ I claim:] [1.] A hydraulic track tensioning circuit for adjustably controlling tension in an endless loop track entrained about an idler wheel and a drive wheel of a track drive mechanism which includes a reversible hydraulic drive motor drivingly connected to the drive wheel and having a pair of

[ I claim:] [1.] A hydraulic track tensioning circuit for adjustably controlling tension in an endless loop track entrained about an idler wheel and a drive wheel of a track drive mechanism which includes a reversible hydraulic drive motor drivingly connected to the drive wheel and having a pair of motor ports, the hydraulic track tensioning circuit comprising:a source of pressurized fluid;a hydraulic tensioning cylinder connected to one of the wheels to move the one wheel in a direction to increase tension in the track proportional to the pressure of fluid supplied to the tensioning cylinder;a supply line directing fluid from the source of pressurized fluid to the tensioning cylinder; anda variable pressure relief valve means connected to the supply line for controlling the fluid pressure in the supply line proportional to the pressure of fluid in one of the motor ports.