The disclosure provides a string trimmer. The string trimmer includes a protective shield, a first motor, a blade and a fan. The first motor is arranged on one side of the protective shield, and a first rotation shaft of the first motor penetrates the protective shield to the other side of the protective shield. The blade is arranged on the other side of the protective shield, and the blade is connected with the first rotation shaft. The fan is arranged on the same side as the first motor, and the fan is mounted on the protective shield through a second rotation shaft. Wherein, a rotation speed ratio between the second rotation shaft and the first rotation shaft ranges from 0.5 to 4. With the string trimmer of the disclosure, the rotation speed of the blade and the fan are different.

An electric powerhead includes a housing including a mounting plate including a shaft opening and a plurality of first openings arranged in a standard horizontal shaft engine mounting pattern. The housing also includes a base including a plurality of second openings arranged in a standard horizontal shaft engine support pattern. The electric powerhead further includes an electric motor positioned within the housing, where the electric motor includes an output shaft that extends through the shaft opening of the mounting plate and where the output shaft is configured to rotate about an axis of rotation.

A corn header for an agricultural vehicle includes two gathering chains which together draw plants into a snapping gap; two snap rolls positioned beneath the two gathering chains; a first brushless DC motor (BLDC) connected to at least one of the two gathering chains for moving the at least one of the two gathering chains; a chopping unit including a movable blade positioned beneath the snap rolls for fragmentizing stalks of the plants drawn into the snapping gap; and a second BLDC connected to the chopping unit for moving the blade and fragmentizing the stalks of the plants.

A corn header for an agricultural vehicle includes two gathering chains which together draw plants into a snapping gap; two snap rolls positioned beneath the two gathering chains; a first brushless DC motor (BLDC) connected to at least one of the two gathering chains for moving the at least one of the two gathering chains; a chopping unit including a movable blade positioned beneath the snap rolls for fragmentizing stalks of the plants drawn into the snapping gap; and a second BLDC connected to the chopping unit for moving the blade and fragmentizing the stalks of the plants.

The disclosure provides a mower system, a method for setting the rotating speed of a cutter and a mower system management method. The system comprises: a vehicle control unit for controlling the mower to operate; a walking unit for receiving a control signal of the vehicle control unit to control the walking of the mower and perform state feedback to the vehicle control unit; a cutter unit for receiving a control signal sent by the vehicle control unit to control the cutter to run and carrying out state feedback to the vehicle control unit; and a battery management system for performing state feedback on the working state of the battery to the vehicle control unit. The cutter rotating speed can be adjusted instantly according to the vehicle speed, and when the cutter motor enters limit state, the speed can be limited.

A control system of a lawn mowing vehicle, includes at least one continuously variable transmission drivingly connected to two left and right wheels, a revolution speed detection unit, an acceleration instruction unit, a parking brake instruction sensor, a lawn mower, and a control device. The control device, during the drive of the lawn mower, stops the drive of the lawn mower after the revolution speed of each of the two wheels or the revolution speed of the at least one continuously variable transmission has become zero (0) or within a predetermined range near zero (0), and during stop control of the lawn mower, drives the lawn mower when a target revolution speed, issued by the acceleration instruction unit, of the two wheels or of the at least one continuously variable transmission is not zero (0) and the operation of the parking brake is not instructed.

A mowing robot includes a body which forms an outer shape and an internal space; a first wheel and a second wheel which are independently rotatably provided at a first side and a second side respectively so that the body can rotate and move forward with respect to ground; a first motor which provides a rotational force to the first wheel; a second motor which provides a rotational force to the second wheel; and a sensor which is provided in the internal space, has a gyro sensing function for at least horizontal rotation, and has a magnetic field sensing function, wherein the sensor is provided between a wheel front end plane and a wheel rear end plane, and is provided above a first motor upper end plane and a second motor upper end plane.

A mowing robot includes a body which forms an outer shape and an internal space; a first wheel and a second wheel which are independently rotatably provided at a first side and a second side respectively so that the body can rotate and move forward with respect to ground; a first motor which provides a rotational force to the first wheel; a second motor which provides a rotational force to the second wheel; and a sensor which is provided in the internal space, has a gyro sensing function for at least horizontal rotation, and has a magnetic field sensing function, wherein the sensor is provided between a wheel front end plane and a wheel rear end plane, and is provided above a first motor upper end plane and a second motor upper end plane.

An electric powerhead includes a housing including a mounting plate including a shaft opening and a plurality of first openings arranged in a standard horizontal shaft engine mounting pattern. The housing also includes a base including a plurality of second openings arranged in a standard horizontal shaft engine support pattern. The electric powerhead further includes an electric motor positioned within the housing, where the electric motor includes an output shaft that extends through the shaft opening of the mounting plate and where the output shaft is configured to rotate about an axis of rotation.

An attachment device, in particular a milling machine and/or a mulcher, for use with a carrier vehicle, includes at least one functional unit which is configured for a supply of energy by way of the carrier vehicle, in order to achieve rapid and/or simple initial start-up, the attachment device has at least one control unit which, in at least one operating state, automatically controls and/or regulates at least one limit value of an operating parameter of the functional unit.