The power equipment such as a lawn mower (10) comprises an internal combustion engine (100) having a plurality of cylinders, an engine control unit (110) for selectively deactivating at least one of the cylinders, a work implement such as a cutting blade (70) connected to the engine in a power transmitting relationship, a clutch (80) provided in a power transmission path between the engine and the work implement, and a central control unit (50) for controlling an operation of a propelling device, the clutch and the engine control unit. The central control unit is configured to operate the engine at a prescribed rotational speed with two or more of the cylinders kept activated when the clutch is engaged and the propelling device is propelling the power equipment forward, and to deactivate at least one of the cylinders when an opening of a throttle valve is below a first prescribed value for a prescribed time period.

A work machine comprising a work unit that performs work on a travel path, an internal combustion engine configured to generate power for driving the work unit, a traveling unit including a front wheel and a rear wheel, an electric motor configured to generate power for driving a first wheel of the front wheel and the rear wheel, a first clutch for switching between transmission and discontinuation of the power from the internal combustion engine to a second wheel of the front wheel and the rear wheel, and a switching control unit configured to control the first clutch based on a power consumption of the electric motor for switching between the transmission and the discontinuation.

A work machine comprising a work unit that performs work on a travel path, an internal combustion engine configured to generate power for driving the work unit, a traveling unit including a front wheel and a rear wheel, an electric motor configured to generate power for driving a first wheel of the front wheel and the rear wheel, a first clutch for switching between transmission and discontinuation of the power from the internal combustion engine to a second wheel of the front wheel and the rear wheel, and a switching control unit configured to control the first clutch based on a power consumption of the electric motor for switching between the transmission and the discontinuation.

A walk-behind, self-propelled machine includes a clutch having a driving state where a motor drives wheels to rotate and an unlocked state where the wheels freely rotate relative to the motor. The clutch includes a movable member and a driving member. The movable member is capable of moving between a locked position where the clutch is in the driving state and an unlocked position where the clutch is in the unlocked state. The driving member transfers power to the wheels by means of friction. When the clutch is in the driving state, the motor drives the wheels to rotate in a first direction, when the motor stops rotating, the wheels rotate in a second direction opposite to the first direction and can drive the driving member to move by frictional force so that the driving member pushes the movable member to move from the locked position to the unlocked position, and after the motor (40) is turned off, the wheels rotate without driving a motor shaft to rotate, so that a relatively small force can push or pull the walk-behind, self-propelled machine.

A drive connection couples a drive wheel to a drive shaft at the end of a chopping drum through a clutch arrangement including a clutch disk unit having clutch disks on the drive wheel side and clutch disks on the drive shaft side, the disks being frictionally engaged with each other by a pressure plate arranged on a drive shaft end region and acting on the clutch disk unit, and a connecting bolt arranged concentrically to the drive shaft. Formed on the connecting bolt is a first external thread located for being brought into engagement with a first threaded bore provided in the pressure plate, and a second external thread for being brought into engagement with a second threaded bore provided in the shaft end region, wherein the first and second external threads and the first and second threaded bores have thread directions configured to oppose one another.

A drive connection couples a drive wheel to a drive shaft at the end of a chopping drum through a clutch arrangement including a clutch disk unit having clutch disks on the drive wheel side and clutch disks on the drive shaft side, the disks being frictionally engaged with each other by a pressure plate arranged on a drive shaft end region and acting on the clutch disk unit, and a connecting bolt arranged concentrically to the drive shaft. Formed on the connecting bolt is a first external thread located for being brought into engagement with a first threaded bore provided in the pressure plate, and a second external thread for being brought into engagement with a second threaded bore provided in the shaft end region, wherein the first and second external threads and the first and second threaded bores have thread directions configured to oppose one another.

The lawn mower (10) comprises an internal combustion engine (100) having a plurality of cylinders, an engine control unit (110) for selectively deactivating at least one of the cylinders, a cutting blade (70) supported by a lawn mower main body via a cutter deck, and connected to the engine in a power transmitting relationship, a clutch (80) provided in a power transmission path between the engine and the cutting blade, a height adjustment mechanism (90) provided on the cutter deck for adjusting the height of the cutting blade, and a central control unit (50) for controlling an operation of the height adjusting mechanism, the clutch and the engine control unit. The central control unit is configured to cause the engine control unit to deactivate at least one of the cylinders when a prescribed operating condition is met, and to raise the cutting blade to a prescribed elevated height before deactivating the at least one of the cylinders.

The lawn mower (10) comprises an internal combustion engine (100) having a plurality of cylinders, an engine control unit (110) for selectively deactivating at least one of the cylinders, a cutting blade (70) supported by a lawn mower main body via a cutter deck, and connected to the engine in a power transmitting relationship, a clutch (80) provided in a power transmission path between the engine and the cutting blade, a height adjustment mechanism (90) provided on the cutter deck for adjusting the height of the cutting blade, and a central control unit (50) for controlling an operation of the height adjusting mechanism, the clutch and the engine control unit. The central control unit is configured to cause the engine control unit to deactivate at least one of the cylinders when a prescribed operating condition is met, and to raise the cutting blade to a prescribed elevated height before deactivating the at least one of the cylinders.

The present disclosure is directed to an agricultural work vehicle including: a vehicle body configured to support an engine; a transmission configured to perform shifting on drive generated by the engine; a braking unit implemented as a hydraulic brake or a mechanical brake, and configured to reduce the travelling speed of the vehicle body and control the deceleration of each of left and right wheels; an operation unit provided in the vehicle body; and a control unit configured to control the transmission and the braking unit; wherein the control unit includes a conjunctive operation module configured to control the braking unit and the forward-reverse clutch so that both the braking rate at which the braking unit reduces the travelling speed of the vehicle body and the drive transmission rate at which the forward-reverse clutch transmits drive are adjusted.

A power transfer arrangement includes: a first drive shaft configured to couple to a power source; a first slip clutch assembly including a drive hub, a clutch housing coupled to the drive hub, and a clutch hub disposed partially within the clutch housing and including a coupling that extends outside of the clutch housing and is coupled to the first drive shaft, the clutch hub being configured to rotate the clutch housing and the coupled drive hub; a second drive shaft coupled to the clutch hub; a gearbox coupled to the drive hub; and a second slip clutch assembly including a second drive hub, a second clutch housing coupled to the second drive hub, and a second clutch hub disposed partially within the second clutch housing and including a second coupling that extends outside of the second clutch housing and is coupled to the second drive shaft.