Outdoor power equipment includes a frame, a power head, a hydrostatic transmission, a pair of rear drive wheels, a drive chain, and a wheel height adjustment mechanism. The hydrostatic transmission includes a drive gear configured to rotate about a first axis. The pair of rear drive wheels are coupled at respective ends of a rear drive axle, wherein the rear drive axle is operably coupled to a driven gear. The pair of rear drive wheels, the rear drive axle, and the driven gear are configured to rotate about a second axis. The drive chain is operably coupled to both the drive gear and the driven gear. The wheel height adjustment mechanism includes a first bell crank pivotally coupled to the frame about the first axis, with a first end of the first bell crank being coupled to the rear drive axle.

Provided is an electric work vehicle having a simple configuration, yet allowing a hydraulic cylinder to function appropriately even in a low-temperature environment. An electric work vehicle includes a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder and includes also a hydraulic system for feeding work oil to these hydraulic cylinders and a traveling motor. The hydraulic system includes an oil heating circuit for heating the work oil using heat generated from the traveling motor.

Provided is an electric work vehicle having a simple configuration, yet allowing a hydraulic cylinder to function appropriately even in a low-temperature environment. An electric work vehicle includes a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder and includes also a hydraulic system for feeding work oil to these hydraulic cylinders and a traveling motor. The hydraulic system includes an oil heating circuit for heating the work oil using heat generated from the traveling motor.

A mower can dynamically adjust the cutting height of a mower deck based on a mower's location. As a mower travels over an area of grass to be cut, a control system can track the current location of each mower deck on the mower. The control system can compare the current location of a mower deck to a boundary of one or more sections defined within the area to thereby determine which section the mower deck is within. When the control system detects that a mower deck has crossed or will cross into a section, it can identify a particular cutting height assigned to the section and dynamically adjust the cutting height of the mower deck to the particular cutting height. When a mower includes more than one mower deck, the control system can be configured to independently adjust the cutting height of each mower deck based on its location.

A mower can dynamically adjust the cutting height of a mower deck based on a mower's location. As a mower travels over an area of grass to be cut, a control system can track the current location of each mower deck on the mower. The control system can compare the current location of a mower deck to a boundary of one or more sections defined within the area to thereby determine which section the mower deck is within. When the control system detects that a mower deck has crossed or will cross into a section, it can identify a particular cutting height assigned to the section and dynamically adjust the cutting height of the mower deck to the particular cutting height. When a mower includes more than one mower deck, the control system can be configured to independently adjust the cutting height of each mower deck based on its location.

The present disclosure relates to a robotic lawnmower cutting deck (130) comprising a cutting system (131) which in turn comprises at least two cutters (132a, 132b, 132c), with a cutting disc (133a, 133b, 133c) and cutter motor (134a, 134b, 134c). The cutters (132a, 132b, 132c) are supported by a cutter support beam (135) which has a longitudinal beam extension (L1) and in turn is supported at respective supporting positions (135a, 135b) by a corresponding first link arm (136a, 136b) and a corresponding second link arm (137a, 137b). At each supporting position (135a, 135b): the link arms (136a, 136b; 137a, 137b) are pivotingly attached to the cutter support beam (135) with a corresponding first pivot pin (138a, 138b) and second pivot pin (139a, 139b) that are fixed relative each other, the link arms (136a, 136b; 137a, 137b) are pivotingly attached to a frame part (140a, 140b) with a corresponding third pivot pin (141a, 141b) and fourth pivot pin (142a, 142b), the third pivot pin (141a, 141b) and fourth pivot pin (142a, 142b) have an adjustable relation relative each other such that the cutter support beam (135) is rotated (R) around the longitudinal beam extension (L1) when the relation between the third pivot pin (141a, 141b) and fourth pivot pin (142a, 142b) is adjusted.

The present disclosure relates to a robotic lawnmower cutting deck (130) comprising a cutting system (131) which in turn comprises at least two cutters (132a, 132b, 132c), with a cutting disc (133a, 133b, 133c) and cutter motor (134a, 134b, 134c). The cutters (132a, 132b, 132c) are supported by a cutter support beam (135) which has a longitudinal beam extension (L1) and in turn is supported at respective supporting positions (135a, 135b) by a corresponding first link arm (136a, 136b) and a corresponding second link arm (137a, 137b). At each supporting position (135a, 135b): the link arms (136a, 136b; 137a, 137b) are pivotingly attached to the cutter support beam (135) with a corresponding first pivot pin (138a, 138b) and second pivot pin (139a, 139b) that are fixed relative each other, the link arms (136a, 136b; 137a, 137b) are pivotingly attached to a frame part (140a, 140b) with a corresponding third pivot pin (141a, 141b) and fourth pivot pin (142a, 142b), the third pivot pin (141a, 141b) and fourth pivot pin (142a, 142b) have an adjustable relation relative each other such that the cutter support beam (135) is rotated (R) around the longitudinal beam extension (L1) when the relation between the third pivot pin (141a, 141b) and fourth pivot pin (142a, 142b) is adjusted.

A height of cut and rake adjustment system for a rough, trim and surround mower deck with a pair of front height of cut arms and a pair of rear height of cut arms. Each height of cut arm is pivotably mounted to the mower deck on a pivot axis below an upper end of each height of cut arm. An adjustable height of cut linkage extends between the upper end of each front height of cut arm and the upper end of each rear height of cut arm. An adjustable rake linkage extends between the upper end of each front height of cut arm and an intermediate portion of each rear height of cut arm below the pivot axis.

A height of cut and rake adjustment system for a rough, trim and surround mower deck with a pair of front height of cut arms and a pair of rear height of cut arms. Each height of cut arm is pivotably mounted to the mower deck on a pivot axis below an upper end of each height of cut arm. An adjustable height of cut linkage extends between the upper end of each front height of cut arm and the upper end of each rear height of cut arm. An adjustable rake linkage extends between the upper end of each front height of cut arm and an intermediate portion of each rear height of cut arm below the pivot axis.

A walk-behind lawnmower and accompanying method of use allows for height adjustment of the cutting deck relative to all four wheels simultaneously. This is achieved using a linkage that runs along the cutting deck and that connects the front and rear wheel assemblies. Movement of the entire mechanism is achieved using a lever operatively connected to the linkage. The linkage is retained in place through the use of a locking mechanism. The locking mechanism includes a locking pin, a pin engagement mechanism, such as a lug, provided on the linkage, and an array of pin receptacles spaced longitudinally along the cutting deck. The pin engagement mechanism selectively engages the pin when the pin engages a designated pin receptacle on the cutting deck, retaining the cutting deck at a height determined by the prevailing location of the pin which, in turn, is determined by the selected pin receptacle.