There is provided a powered device and an energy absorbing device (EAD) for a powered device. The powered device includes an actuator to power a rotatable shaft coupled to a working member, a housing to house the actuator, a structural member to be coupled to the housing, and an EAD. The EAD is disposed between the housing and the structural member. The EAD is to absorb at least a portion of an impact energy of the working member striking an obstacle. Moreover, the EAD is to absorb the portion of the impact energy by being plastically deformed by the portion of the impact energy.

A configuration of a direct drive lawnmower spindle assembly to protect sensitive electric motor components is provided. A spindle shaft of the spindle assembly is supported by upper and lower bearings. An upper end of the spindle shaft is mounted to a rotor of the electric motor and a lower end of the spindle shaft extends through the clearance opening. The lower bearing is supported by a lower bearing carrier that is mounted to the bottom of the spindle housing. The lower bearing can be serviced by removing the lower bearing carrier. A clearance gap between the spindle shaft and the clearance opening is sufficiently small to limit spindle shaft tipping to a degree that will not damage the motor. The invention also provides a friction coupling system for coupling a blade with the rotating spindle shaft.

Vision systems for autonomous machines and methods of using same during machine localization are provided. Exemplary systems and methods may reduce computing resources needed to perform vision-based localization by selecting the most appropriate camera from two or more cameras, and optionally selecting only a portion of the selected camera's field of view, from which to perform vision-based location correction. Other embodiments may provide camera lens coverings that maintain optical clarity while operating within debris-filled environments.

A tilt monitoring assembly (200) for a yard maintenance vehicle (10) may include processing circuitry (210) configured to receive speed information indicative of a current speed of the vehicle (500), receive orientation information indicative of a three dimensional orientation of the vehicle (510), receive weight information indicative of operator weight associated with a driver of the vehicle (530), determine a tilt status based on the speed information, the orientation information and the weight information (540), and provide an output associated with operation of the vehicle based on the tilt status (550).

A lawnmower cutter assembly (22) comprises a knife carrier arrangement (26) and a skid plate arrangement (30), which are axially held between an axial stop shoulder (60) of the cutter drive shaft (34) and an end piece (54) rigidly connected to the cutter drive shaft (34), the end piece (54) thereby vertically carrying the skid plate arrangement (30) and the knife carrier arrangement (26). The cutter assembly (22) may be attached to a lawnmower, which may be a robotic lawnmower, by positioning the knife carrier arrangement (26) and the skid plate arrangement (30) on the cutter drive shaft (34); and thereafter, axially locking the axial position of the knife carrier arrangement (26) and the skid plate arrangement (30) in relation to the cutter drive shaft (34).

An automatic working system comprises a self-moving device moving and working in a working region, a handheld device and a control module. The handheld device is configured to move along a perimeter of the working region with a user and comprises a detecting module, detecting the perimeter information of the working region; and an input module, receiving a command of the user for detecting the perimeter information. The control module comprises a perimeter setting unit, generating virtual data of the perimeter, an area calculation unit calculating the area of the working region and a scheduling unit generating a working schedule. The self-moving device comprises a working module, a driving module and a controller. The controller controls the self-moving device to work according to the working schedule.

A moving robot has a body and at least one wheel for moving the main body. The moving robot has a transceiver to communicate with a plurality of location information transmitters located within an area. The moving robot also has a memory storing coordinate information regarding positions of the location information transmitters. Further, the moving robot has a controller that sets a virtual boundary based on location information determined using signals transmitted by the location information transmitters. The controller controls the wheel so that the main body is prevented from traveling outside the virtual boundary. The controller sets a reference location information transmitter and corrects the stored coordinate information by correcting height errors based on height differences between the reference location information transmitter and the other location information transmitters. The controller also corrects a current position of the main body based on the corrected stored coordinate information.

A dual handle speed adjustment device includes left and right handles, a link and a slider. The left and right handles each have an actuating end, an operating end and a handle hinge as a pivot axis. The slider has a first connection end connected to the actuating ends of the left and right handles, a second connection end connected to a speed control device, and a part between the first and second connection ends hinged to one end of the link, which has the other end thereof provided with a link rotation axis. The left and right handles independently drive the slider to move when they are turned. The invention can realize the separate operation of two speed adjusting handles.

In an electric grass cutting machine relating to the present invention, an electric motor for driving a traveling device having a pair of left and right front wheels and a pair of left and right rear wheels and a gear transmission for speed-changing output from the electric motor and transmitting the resultant power to the traveling device are disposed between the left and right rear wheels and arranged one after the other in the front/rear direction at positions laterally of a conveying duct for guiding cut grass pieces from a rear discharge type mower device to a grass collecting container supported to a rear portion of a machine body frame.

A lawnmower and lawnmower control handle can include a bar configured to pivot in a direction of an input force applied by an operator and a grip having an outer surface that is a non-circular shape and an inner surface that is a different shape than the shape of the outer surface. The bar can be located inside the grip and disposed against the inner surface of the grip.