Nanjing Chervon Industry Patente

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An electric power tool includes: a cutting assembly (120) that includes at least one cutting blade (122) and a cutting motor (M1) driving the cutting blade (122) to perform a cutting action; a power supply device (170) that is at least configured to supply power to the cutting motor (M1); and a controller (130) that is configured to estimate a moment of inertia of the cutting motor (M1), and control operation of the cutting motor (M1) according to the moment of inertia of the cutting motor (M1). The tool can realize fault detection on the cutting blade and control the operation of the cutting motor through the moment of inertia of the cutting motor, thereby improving reliability of the fault detection and control on the cutting blade.

Provided is a nail gun, including: a power assembly including at least a motor and a transmission assembly; a firing assembly including at least a cylinder assembly and a striker assembly; and a housing assembly including at least a first housing for a user to grip and a second housing for accommodating at least part of the firing assembly; where, at least part of the power assembly is located inside the first housing; and a distance D7 between a center of gravity of the nail gun and a central plane defined by the first housing along a front-rear direction and a vertical direction is less than or equal to 5 mm.

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Provided are a working system of a self-moving device and a base station. The working system of a self-moving device includes the self-moving device that autonomously travels and performs a work task, a first base station that acquires first satellite observation data, generates first differential data through parsing, and transmits the first differential data to the self-moving device, and a second base station that acquires second satellite observation data, generates second differential data through parsing, and transmits the second differential data to the self-moving device. The self-moving device receives the first differential data from the first base station and the second differential data from the second base station and calculates a difference parameter according to the first differential data and the second differential data, and in a case where the difference parameter meets a corresponding base station offset condition, it is determined that the first base station and/or the second base station deviates from a corresponding initial installation position, and a base station offset alarm is sent.

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A power tool includes a cylinder at least partially disposed in a housing, where gas is stored in the cylinder. The cylinder includes: an inflation nozzle, where the cylinder is inflated with the gas in advance through the inflation nozzle; an inflation valve, where the gas filled through the inflation nozzle flows through the inflation valve and then enters the cylinder; and a pressure relief valve disposed between the inflation nozzle and the inflation valve, where when a pressure of the gas filled through the inflation nozzle is greater than a first preset pressure, the filled gas is released through the pressure relief valve.

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Provided is a stand-on mower. The stand-on mower includes a mowing assembly including a mowing element for implementing a mowing function; a pair of drive rods configured at least for the user to operate to have at least a first position at which the drive rods open to both sides and a second position at which the drive rods close toward the center; a traveling assembly including front traveling wheels and rear traveling wheels; a drive assembly including at least a first electric motor configured to drive the traveling assembly; a power supply device configured to supply power to at least the first electric motor; a control assembly configured to control the operation of at least the first electric motor; and a display screen with a display plane. The projection of the drive rods at the second position on a first plane at least partially overlaps the projection of the display plane on the first plane. The first plane is parallel to the ground plane where the traveling assembly is located.

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The present application discloses a polishing machine, including: a housing, a motor, a main shaft, a mounting shaft, a limiting member, and a locking mechanism. The main shaft is drivably connected to a motor shaft of the motor, and the main shaft is rotatable relative to the housing around a first axis. The mounting shaft is detachably connected to the main shaft. Movement of the mounting shaft drives the locking mechanism, such that the locking mechanism allows the limiting member to move to limit movement of the mounting shaft in a direction of the first axis. The polishing machine, through providing the locking mechanism, enables a user to complete connection and locking of the mounting shaft and the main shaft through one operation, simplifies operation steps for installing a working head, and improves an efficiency of replacing the working head.

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