초록 ▼

A track adjusting mechanism establishes the optimum tension in the endless track assembly of a track type vehicle. The track adjusting mechanism is controlled by the vehicle operator from the operator\s station. The adjusting mechanism includes a fluid cylinder, a piston movable within the cylinder,

A track adjusting mechanism establishes the optimum tension in the endless track assembly of a track type vehicle. The track adjusting mechanism is controlled by the vehicle operator from the operator\s station. The adjusting mechanism includes a fluid cylinder, a piston movable within the cylinder, and a hydraulic circuit to supply fluid to the cylinder. Fluid leakage from the cylinder is collected and stored in an accumulator. A single fluid line in the hydraulic circuit serves as a high pressure line to the cylinder in a first mode and a low pressure drain line from the cylinder in a second mode. The accumulator is also connected to this single fluid line and a one-way check valve prevents high pressure fluid from entering the accumulator while allowing the low pressure leakage fluid to pass through and reach the low pressure drain line.

대표청구항 ▼

A track adjusting mechanism for adjusting the tension in the track of a track-type vehicle comprising: a track roller frame having first and second portions slidably movable relative one to the other; first and second wheels connected respectively to said first and second portions of said roller fra

A track adjusting mechanism for adjusting the tension in the track of a track-type vehicle comprising: a track roller frame having first and second portions slidably movable relative one to the other; first and second wheels connected respectively to said first and second portions of said roller frame, said track being entrained around said first and second wheels and said roller frame; means for biasing said first wheel away from said second wheel, said means including a compressed spring positioned within said first portion of said track roller frame; means for varying the degree of compression of said spring, including a first piston reciprocally movably positioned within said first portion of said track roller frame; a fluid cylinder having a fluid leakage port for receiving low pressure leakage fluid, said cylinder being contained within said second portion of said track roller frame; a source of pressurized fluid and means for controlling the flow of said pressurized fluid between said source and said fluid cylinder, said means including a variable position control valve; a second piston positioned within said cylinder and being movable by said pressurized fluid; means for collecting and storing said low pressure leakage fluid from said cylinder, said means being in fluid communication with said fluid leakage port; and a fluid line connected between said control valve and said cylinder, said fluid line adapted to receive high pressure fluid from said control valve in a first operational position of said control valve, and to receive relatively low pressure fluid from said cylinder and low pressure leakage fluid from said collecting means in a second operational position of said control valve.