Utility vehicle and shift device for vehicle

A utility vehicle including a shift device for vehicle, the shift device comprising a forward-reverse shift device capable of switching a driving force transmission path for connecting a driving source to driving wheels, selectively between a forward engagement and a reverse engagement,

• wherein
• the forward-reverse shift device includes:
• a switching member by which the driving force transmission path is switched between the forward engagement and the reverse engagement;
• a pressure actuator that uses pressure energy supplied from a pressure source to move the switching member selectively between the forward engagement and the reverse engagement;
• a pressure supply switching device that switches a direction for supplying a pressure medium to the pressure actuator, as control pressure;
• and
• a controller that controls the pressure supply switching device, and
• the pressure supply switching device switches the direction for supplying the pressure medium to the pressure actuator in accordance with a drive command from the controller, and wherein
• the switching member switches the driving force transmission path selectively among the forward engagement, the reverse engagement, and a neutral,
• the pressure actuator moves the switching member selectively among the forward engagement, the reverse engagement, and the neutral, and
• the pressure supply switching device includes:
• two switching valves each including the spool that moves in the axial direction to switch the direction for supplying the pressure medium;
• two electromagnetic valves corresponding to the two switching valves, respectively, and each having a supply port connected to a flow path via which the pressure source supplies the pressure medium, a control port connected to a flow path for moving the spool of the switching valve, and a discharge port connected to a flow path via which the pressure medium is discharged;
• and
• a fluid circuit including a flow path that is provided for each of the switching valves and via which the pressure medium supplied from the switching valve is routed to the pressure actuator.

A utility vehicle including a shift device for vehicle, the shift device comprising a forward-reverse shift device capable of switching a driving force transmission path for connecting a driving source to driving wheels, selectively between a forward engagement and a reverse engagement,

• wherein
• the forward-reverse shift device includes:
• a switching member by which the driving force transmission path is switched between the forward engagement and the reverse engagement;
• a pressure actuator that uses pressure energy supplied from a pressure source to move the switching member selectively between the forward engagement and the reverse engagement;
• a pressure supply switching device that switches a direction for supplying a pressure medium to the pressure actuator, as control pressure;
• and
• a controller that controls the pressure supply switching device, and
• the pressure supply switching device switches the direction for supplying the pressure medium to the pressure actuator in accordance with a drive command from the controller, and
• the utility vehicle further comprising a pressure medium supply unit different from the pressure actuator to which the pressure medium is supplied,
• wherein
• the pressure medium supply unit is a hydraulic actuator driven by pressure of the pressure medium, and
• a common pressure source supplies the pressure medium to both of the pressure actuator and the hydraulic actuator.

A shift device for a vehicle, the shift device comprising a forward-reverse shift device capable of switching a driving force transmission path for connecting a driving source to driving wheels selectively between a forward engagement and a reverse engagement,

• wherein
• the forward-reverse shift device includes:
• a switching member by which the driving force transmission path is switched between the forward engagement and the reverse engagement;
• a pressure actuator that uses pressure energy supplied from a pressure source to move the switching member selectively between the forward engagement and the reverse engagement;
• a pressure supply switching device that switches a direction for supplying a pressure medium to the pressure actuator, as control pressure;
• and
• a controller that controls the pressure supply switching device, and
• the pressure supply switching device switches the direction for supplying the pressure medium to the pressure actuator in accordance with a drive command from the controller, and
• wherein
• the pressure supply switching device includes:
• a switching valve including a spool that moves in an axial direction to switch the direction for supplying the pressure medium;
• and
• an electromagnetic valve that includes a supply port connected to a flow path through which the pressure medium is supplied from a pressure source, a control port connected to a flow path for moving the spool, and a discharge port connected to a flow path through which the pressure medium is discharged,
• the electromagnetic valve switches to connect the supply port to the control port, and to connect the control port to the discharge port, in accordance with the drive command from the controller.