Walk-behind mower

A lawn mower, comprising:

• a cutter assembly, comprising a first blade and a second blade, the first blade and the second blade being staggered and arranged back and forth,
• a grass discharging passage, arranged obliquely close to a guiding wall of the first blade;
• a power assembly, supplying power to the cutter assembly and comprising a first motor and a second motor, the first motor and the second motor respectively connected with the first blade and the second blade, and
• a housing, comprising a mowing space configured to house the cutter assembly, the mowing space comprising a first mowing cavity and a second mowing cavity, the first blade is located in the first mowing cavity and the second blade is located in the second mowing cavity, and the first mowing cavity and the second mowing cavity configured to communicate with each other, wherein
• a width of the mowing space is greater than a width of the first mowing cavity or a width of the second mowing cavity, and is smaller than a sum of the widths of the first mowing cavity and the second mowing cavity, an overlapping part is provided by overlapping of cutting areas of the first blade and the second blade in a front and rear direction of the lawn mower, and a ratio of a width of the overlapping part to the width of the mowing space is from 1% to 9%;
• a first end of the grass discharging passage is connected with the mowing space, a second end of the grass discharging passage is connected with a grass collection device, and a closing component is detachably connected between the grass discharging passage and the grass collection device to close or open the grass discharging passage;
• the first blade is driven by the first motor and the second blade is driven by the second motor, the power assembly is electrically connected with a control assembly, the control assembly is arranged on a pushing rod of the lawn mower and configured to control a rotation speed of the first motor and a rotation speed of the second motor independently, allowing the first blade and the second blade to rotate at a same or different speeds, and
• a sensing device is arranged in the grass discharging passage to detect whether the closing component is mounted in the grass discharging passage or not, when it is detected that the closing component is mounted in the grass discharging passage, the first blade and the second blade rotate at a same rotation speed, and when it is detected that the closing component is not mounted in the grass discharging passage, the rotation speed of the first blade is greater than the rotation speed of the second blade.