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.

A mowing machine may include a central cutting deck generally disposed in a neutral mowing plane and a wing cutting deck pivotable with respect to the central cutting deck. A main gearbox may be connected to a wing gearbox by a wing driveline. The main gearbox may be disposed a sufficient distance forward of the central cutting deck and the wing cutting deck to permit the wing cutting deck to pivot about a hinge in a range of motion without disconnecting the wing driveline from either the main gearbox or the wing gearbox.

A mowing machine may include a central cutting deck generally disposed in a neutral mowing plane and a wing cutting deck pivotable with respect to the central cutting deck. A main gearbox may be connected to a wing gearbox by a wing driveline. The main gearbox may be disposed a sufficient distance forward of the central cutting deck and the wing cutting deck to permit the wing cutting deck to pivot about a hinge in a range of motion without disconnecting the wing driveline from either the main gearbox or the wing gearbox.

An automatic lawn compactor includes a case, a battery pack, a controller, a driving device and a trampling device. The battery pack is disposed in the case. The battery pack is configured to supply electrical power to the driving device. The controller is connected with the driving device for controlling the driving device. The driving device is configured to drive the automatic lawn compactor to move autonomously on the lawn. The grass on the lawn is trampled by the trampling device as the automatic lawn compactor moves on the lawn. Through regular trampling the lawn, the grass on the lawn is kept at a certain height to realize the beauty and ornamentality of the lawn. The automatic lawn compactor overcomes the shortcomings of large noise, the difficulty of cleaning up the grass, and the hard work by the existing lawn compactors.

An automatic lawn compactor includes a case, a battery pack, a controller, a driving device and a trampling device. The battery pack is disposed in the case. The battery pack is configured to supply electrical power to the driving device. The controller is connected with the driving device for controlling the driving device. The driving device is configured to drive the automatic lawn compactor to move autonomously on the lawn. The grass on the lawn is trampled by the trampling device as the automatic lawn compactor moves on the lawn. Through regular trampling the lawn, the grass on the lawn is kept at a certain height to realize the beauty and ornamentality of the lawn. The automatic lawn compactor overcomes the shortcomings of large noise, the difficulty of cleaning up the grass, and the hard work by the existing lawn compactors.

A grass cutting mobile robot includes a body and a blade assembly connected to the body and rotatable about a drive axis. The blade assembly includes blades, a housing to hold the blades, a coupling latch configured to lock the housing to a drive shaft of the mobile robot, and a spring that connects the blade to the coupling latch. The housing is configured for coupling to an actuator so that the housing is rotatable about a drive axis, and receives a shaft that connects the housing to the actuator. The shaft includes a groove or an undercut therein. The coupling latch is rotatable within the housing to move an engagement end towards, or away from the groove or undercut. The engagement end is positionable within the groove to lock the housing to the actuator.

A grass cutting mobile robot includes a body and a blade assembly connected to the body and rotatable about a drive axis. The blade assembly includes blades, a housing to hold the blades, a coupling latch configured to lock the housing to a drive shaft of the mobile robot, and a spring that connects the blade to the coupling latch. The housing is configured for coupling to an actuator so that the housing is rotatable about a drive axis, and receives a shaft that connects the housing to the actuator. The shaft includes a groove or an undercut therein. The coupling latch is rotatable within the housing to move an engagement end towards, or away from the groove or undercut. The engagement end is positionable within the groove to lock the housing to the actuator.

A zero turn radius lawnmower, such as a stand-on lawnmower, including a main frame having a first end portion and a second end portion, a pair of drive wheels operably coupled to the second end portion of the main frame and configured to be driven independently in both forward and reverse directions, and a front axle assembly pivotally coupled to the first end portion of the main frame about a single axis. The zero turn radius lawnmower also includes a pair of caster wheels coupled to respective ends of the front axle assembly such that the pair of caster wheels are able to move relative to the main frame, as well as a mower deck coupled to the main frame by at least one first linkage and coupled to the front axle assembly by at least one second linkage.

A zero turn radius lawnmower, such as a stand-on lawnmower, including a main frame having a first end portion and a second end portion, a pair of drive wheels operably coupled to the second end portion of the main frame and configured to be driven independently in both forward and reverse directions, and a front axle assembly pivotally coupled to the first end portion of the main frame about a single axis. The zero turn radius lawnmower also includes a pair of caster wheels coupled to respective ends of the front axle assembly such that the pair of caster wheels are able to move relative to the main frame, as well as a mower deck coupled to the main frame by at least one first linkage and coupled to the front axle assembly by at least one second linkage.

There is provided a mower comprising a base and a height adjustment means. The height adjustment device is a linkage comprised of a front axle, a rear axle and a connecting rod. The base is supported at a position on the front axle offset relative to the front wheel rotation axis, and is supported at a position on the rear axle offset relative to the rear wheel rotation axis. Between the base and the connecting rod is disposed a first elastic member that can apply a first elastic tension so that the base has a rising tendency when being in a low position. Between the base and at least one of the front axle and the rear axle, there is disposed a second elastic member that can apply a second elastic tension.