The invention provides a blade and a lawn mower. The blade comprises a flat middle portion, and two end portions respectively disposed at two opposite ends of the middle portion, wherein a cutting edge is located on the end portion, and wherein each end portion includes a first end portion and a second end portion, and wherein the second end portion is located between the middle portion and the first end portion, and wherein along the longitudinal direction of the middle portion, the ratio of the length of the first end portion to the length of the blade in a horizontal plane is between 0.045 and 0.09. The blade and the lawn mower have advantages that grass can be smashed completely by the blade to achieve an optimal grass smashing effect, the structure is simple and the cost is low.

The invention provides a blade and a lawn mower. The blade comprises a flat middle portion, and two end portions respectively disposed at two opposite ends of the middle portion, wherein a cutting edge is located on the end portion, and wherein each end portion includes a first end portion and a second end portion, and wherein the second end portion is located between the middle portion and the first end portion, and wherein along the longitudinal direction of the middle portion, the ratio of the length of the first end portion to the length of the blade in a horizontal plane is between 0.045 and 0.09. The blade and the lawn mower have advantages that grass can be smashed completely by the blade to achieve an optimal grass smashing effect, the structure is simple and the cost is low.

A lawn mower includes a blade assembly configured to perform a cutting function, a deck formed with an accommodation space for accommodating at least a portion of the blade assembly, a motor configured to drive the blade assembly to rotate about a rotation axis, and a battery pack configured to power the motor. The blade assembly includes a first cutting portion configured to cut grass and a second cutting portion configured to cut grass. In the direction parallel to the rotation axis, the second cutting portion is located under the first cutting portion. The battery pack includes a battery pack housing and battery cells provided in the battery pack housing.

A lawn mower includes a blade assembly configured to perform a cutting function, a deck formed with an accommodation space for accommodating at least a portion of the blade assembly, a motor configured to drive the blade assembly to rotate about a rotation axis, and a battery pack configured to power the motor. The blade assembly includes a first cutting portion configured to cut grass and a second cutting portion configured to cut grass. In the direction parallel to the rotation axis, the second cutting portion is located under the first cutting portion. The battery pack includes a battery pack housing and battery cells provided in the battery pack housing.

A cutting blade replacement jig for replacing a cutting blade of a utility unit, the cutting blade being attached to a peripheral edge part of a disk by a first fastening member and a second fastening member fastened to the first fastening member, the first fastening member passing through a disk through hole formed in the peripheral edge part and a cutting blade through hole formed in the cutting blade. The cutting blade replacement jig includes: a fastening member holder configured to hold the second fastening member; and a cutting blade holder configured to hold the cutting blade on the second fasting member held in the fastening member holder in a state where a center line of the cutting blade through hole and a center line of the second fasting member are aligned.

A high-efficiency cutting system for an autonomous mower provides a multiple blade tip cutting radius for a cleaner cut, and more complete mow. The system includes a spinning blade disk provided within a housing including a vertical standoff. The blade disk includes a first pair of cutting blades located between the center of the blade disk and the circumference of the blade disk, and a second pair of cutting blades located radially inward from the first pair of cutting blades. The cutting blades extend downward and away from the blade disk at an angle.

A blade and a lawn mower including the same is provided. The blade includes a main body, the main body includes a body portion and an assembling portion which is connected to the body portion, the assembling portion is configured for being disposed on a mowing disk of a lawn mower, the mowing disk is rotatable about an axial direction, the body portion includes two side faces opposite to each other, each said side face has a curved section and a plane section, the two side faces define a midline therebetween, and the midline and a vertical plane which is lateral to the axial direction define an angle therebetween.

A blade and a lawn mower including the same is provided. The blade includes a main body, the main body includes a body portion and an assembling portion which is connected to the body portion, the assembling portion is configured for being disposed on a mowing disk of a lawn mower, the mowing disk is rotatable about an axial direction, the body portion includes two side faces opposite to each other, each said side face has a curved section and a plane section, the two side faces define a midline therebetween, and the midline and a vertical plane which is lateral to the axial direction define an angle therebetween.

A detection device for metal stakes in a wire-trained plant-crop hedge having at least one detector configured to generate a detection signal when it passes next to a metal stake of the hedge wherein the metal stake detector has a first and a second metal detector arranged for generating respectively a first and a second measurement signal when they pass next to one of the metal stakes of the hedge. The first and second metal detectors are mechanically secured to each other in movement and arranged for being spaced vertically relative to each other. The detection device has an electronic management unit for the detection signals, configured for, upon detection of a temporal offset between the maximum variation levels of the first and second measurement signals, generating a signal indicating an inclined state of the metal stake.

An apparatus for a quick release cutting device blade assembly is provided. The apparatus includes a blade carrier assembly. The blade carrier assembly includes an adaptor and a backing plate configured to fit over the central post and including a second flat surface. The adaptor includes a flat end plate including a first flat surface, a central post, and a female threaded portion configured to be engaged to a male threaded portion of an output shaft of a cutting device. The blade carrier assembly is configured to affix a cutting device blade between the first flat surface and the second flat surface. The female threaded portion includes a thread pattern configured for resisting a tool-lock condition when a force transmitted through teeth of the thread pattern is maintained below a maximum operational force.