A walk-behind lawnmower includes a mower deck, a plurality of wheels coupled to the mower deck, a drive motor configured to operate at a drive speed to drive at least one of the plurality of wheels, and a handle coupled to the mower deck. The handle includes a user interface having a variable speed control configured to be actuated an actuation percentage, and a maximum speed control including a setting corresponding to a maximum mower speed. The drive speed of the drive motor is determined using the actuation percentage of the variable speed control scaled by the setting of the maximum speed control.

A discharge accessory for a lawnmower includes an inlet end and a hook disposed at the inlet end. The hook defines a channel. A lever arm extends from the hook in a direction transverse to the channel, and a protrusion is disposed in the channel. The protrusion extends in a first direction transverse to the channel and to the lever arm, and the protrusion extends in a second direction transverse to the channel.

The present invention relates to a robotic lawn mower. The lawn mower comprises a housing having an upper cover portion and a chassis as a carrying platform; a mowing assembly mounted on the front section of the chassis and having two sets of rotatable cutting tools, and a moving assembly having four moving wheels that are mounted on the sides of the chassis; and a control unit for controlling the operation of the mowing assembly and moving assembly; as well as a power source providing power to the mowing assembly for the rotation of the cutting tools and the moving assembly for driving the lawn mower in any or all directions without necessity of turning the front or head of the mower. The cutting tools are formed of semi rigid and semi flexible material, and in the form of short rod or twisted cables or wires.

The present invention discloses a method comprising: A. acquiring the current I0 and I, and setting It1, It2, IR, Vmin, and Vmax. B. acquiring the speed V, and setting the speed VL and VH; C. a mowing motor runs in a low-speed mode, and a self-propelled motor runs at the speed VH; D. when encountering grassy areas, if I0<I<It1, keeping unchanged; if I≥It1 and lasting for T1, skipping to E; if I=IR, skipping to G; E. the mowing motor switches to the high-speed mode; F. the mowing motor switches to the low-speed mode, V is switched to VH; G the mowing motor switches to the high-speed mode, V is adjusted to VL; H. the mowing motor stops, the self-propelled motors stop, then retreat and work along the original path, after attempting for M times, if the self-propelled motors stop again, bypassing and skipping to C to continue working.

Disclosed are a lawn mower robot and a control method for same. A lawn mower robot and a control method for same according to an embodiment of the present invention can sense height information about the height between a lawn and the lower side of the lawn mower robot. The sensed height information is used as supporting data for calculating whether the lawn mower robot has deviated from a preset travel path, as well as the deviation direction. Accordingly, even when a separate sensing means is not provided, whether the lawn mower robot has deviated from the preset travel path is calculated using the height information about the height from the ground, and thus the lawn mower can be returned to the preset travel path.

The present invention relates to a hybrid power system for a robot or a robotic lawn mower. It comprises at least one generator for generating an electric current; at least one control board being provided to receive the electric current from the generator; and at least one rechargeable battery being connected to and charged by the electric current from the control board, and being charged by the electric current from the generator as well. The generator can he an AC generator or a DC generator, and there may be two generators, and two operation control boards. There are two types of end units, such as a cutting assembly and a moving assembly. At least one of the control boards provides a driving power for driving one of the end units of the robot or the robotic lawn mower, which may be operative under AC or DC. The cutting assembly may include a set of cutting tools and the moving assembly may have a set of moving wheels, which may move in any directions under the control of the control boards.

A battery powered lawnmower having a blade motor coupled to at least one blade, a user input device configured to receive a blade motor control signal and a bail control bar. The bail control bar is coupled to a position sensor configured to determine a position of the bail control bar. The battery powered lawnmower further includes a controller coupled to the position sensor and configured to control an operation of the blade motor. The controller is configured to receive a blade motor control command and determine a position of the bail control bar based on data provided by the position sensor. The controller is further configured to, in response to determining that the bail control bar is in a closed position, control the blade motor based on the received blade motor control command.

A lawnmower may include an inertial measurement device configured to capture data indicative of an orientation of a housing of the lawnmower. The lawnmower may also include a controller coupled (i) to a motor configured to rotate one or more cutting blades and (ii) to the inertial measurement device. The controller may be configured to receive, from the inertial measurement device, the data indicative of the orientation of the housing. The controller may be further configured to determine a three-dimensional position of the housing based on the data. The three-dimensional position of the housing may indicate whether the orientation of the housing is desirable for operation of the lawnmower. The controller may be further configured to control the motor based on the three-dimensional position of the housing.

An agricultural mowing system includes: a driving vehicle having a steerable axle and a pivotable tongue and defining a travel axis; a first mower coupled to the driving vehicle; a second mower coupled to the tongue; a tongue actuator configured to pivot the tongue; a tongue angle sensor configured to output signals corresponding to a tongue angle of the tongue; and a controller operatively coupled to the tongue actuator and the tongue angle sensor. The controller is configured to: determine a lateral overlap or underlap of the mowers exceeds a threshold value based at least partially on the tongue angle and a steering angle of the steerable axle; determine a correction angle needed for the tongue to pivot such that the lateral overlap or underlap no longer exceeds the threshold value; and output a correction signal to the tongue actuator to pivot the tongue by the correction angle.

Systems and techniques for generating a set of connected segments for a device or system to traverse in order to reach every point of the region (a coverage plan). Nodes defining the region to be traversed define a polygon. The polygon is decomposed into a mesh and a graph of the mesh is generated. The graph may be used to determine a longest funneled path which, in turn, may be used to either optimize for a longest path or to divide the polygon for eroding sides. The longest path and/or erosions are used to define a set of segments. The segments are connected, which in some examples is done via an optimization to minimize an amount of time or energy to traverse all segments and connections. The resultant coverage plan is sent to a system configured to receive the plan and traverse the region.