Traveling Motor Shift Control for Reduced Shock in Working Machines

The patent combines the shock reduction function with the existing actuation valve by adding a shock reduction valve that integrates into the fluid circuit. Instead of adding completely separate components like bleed fluid lines, the shock reduction valve is merged with the actuation system to control fluid flow to both the actuation motor and traveling motor, thereby reducing shift shock without significantly increasing part count.

The shock reduction valve acts as an intermediary component between the actuation valve and the traveling motor. It mediates the fluid flow by selectively controlling when fluid is supplied to the traveling motor during speed shifts, thereby reducing shock without requiring direct modification of the actuation valve or addition of complex external systems.

The shock reduction valve performs preliminary action by controlling the fluid flow to the traveling motor in advance during speed shifts. When the actuation valve opens to allow fluid flow for speed change, the shock reduction valve预先 controls the timing and amount of fluid supplied to the traveling motor, preventing sudden speed changes and reducing shock before it fully manifests.

The system dynamically adjusts fluid flow control based on operating conditions. The shock reduction valve responds to the opening degree of the actuation valve and dynamically modulates fluid supply to the traveling motor, creating a dynamic control system that adapts to different acceleration and deceleration scenarios while minimizing shock.