Linear motor and electric tool with buffering function at extreme position

Abstract

The invention discloses a linear motor and an electric tool with a buffering function at an extreme position, the linear motor comprises a stator assembly, a rotor assembly and a supporting and positioning piece which are arranged in a shell, the rotor assembly does linear reciprocating motion in the stator assembly and the supporting and positioning piece, a buffering cavity is arranged in the shell, a piston body which moves synchronously with the rotor assembly is fixedly connected to the rotor assembly, the piston body is arranged in the buffer cavity in a sliding mode and divides the buffer cavity into a first cavity body and a second cavity body, a first vent hole and a second vent hole are formed in the side wall of the buffer cavity, and when the piston body moves to the limiting position of the first cavity body or the second cavity body, the piston body blocks or exceeds the first vent hole or the second vent hole and compresses fluid in the first cavity or the second cavity, so that an air pressure difference is formed between the first cavity and the second cavity, and the piston body is buffered. According to the invention, a buffering effect is achieved when the mover assembly runs to a limit position, the impact of the mover assembly on the shell is reduced, and meanwhile, enough power is kept without loss in most of the time in the running process.

Description

technical field [0001] The invention relates to the technical field of buffers, in particular to a linear motor with a buffer function at an extreme position and a power tool using the buffer. Background technique [0002] With the continuous improvement of living conditions, people have higher and higher requirements for all aspects of life. Therefore, various daily necessities and electrical products used in people's lives are constantly being introduced. Linear motor is a new type of direct drive technology developed recently. Due to the outstanding advantages of linear motors such as zero transmission chain, no contact, no backlash, high rigidity, and fast response, linear motors are gradually becoming the core functional components of linear motion products. [0003] In the application of linear power machine derivative products, such as linear power electric tools, civil tools, etc., they are not pure pump bodies, but may be other pure application power tools, such as...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the technology of ordinary linear motor control that is not in place, such as the linear motor control technology that does not need a position sensor, or under the condition that the linear motor control technology is not perfect, to provide a buffer function at the limit position Linear Motors and Power Tools

Images