Mower and height adjustment method of mower

A height adjustment method of a mower, comprising:

• obtaining a preset height adjustment distance and a starting signal of a height adjustment motor;
• controlling a first signal receiver to continuously receive a first signal, and obtaining an actual height adjustment distance according to a number of times that the first signal is interrupted;
• stopping the height adjustment motor if the actual height adjustment distance reaches the preset height adjustment distance;
• wherein the method further comprises:
• controlling the height adjustment motor to stop running when a triggering component triggers a micro switch, and a cutting device reaching a lowest cutting position or a highest cutting position at this time.

A mower, comprising:

• a casing;
• a cutting device arranged on the casing;
• a height adjustment mechanism driving the cutting device to move along a height adjustment direction relative to the casing;
• a sensing assembly configured to detect a height adjustment distance, including
• an optical grating structure including hollow parts and blocking parts distributed alternately, and
• a first sensor including a first signal receiver and a first signal transmitter;
• and
• a control unit configured to control the height adjustment mechanism;
• wherein a first signal is sent by the first signal transmitter and received by the first signal receiver, the first signal is periodically blocked by the optical grating structure during height adjustment;
• wherein the height adjustment mechanism further comprises:
• a cutting frame, the cutting device being arranged on the cutting frame and provided with a cutting motor to drive a cutting disc to perform a cutting, and the cutting frame being mounted in a sliding passage of the casing;
• a height adjustment motor, fixedly connected with the casing;
• and
• a transmission structure, connecting the height adjustment motor with the cutting frame, configured to convert a rotation motion output by the height adjustment motor into a linear motion of the cutting frame along the sliding passage, and the height adjustment motor driving the cutting frame to adjust the height;
• wherein one of the optical grating structure and the first sensor is arranged on the cutting frame.