Abstract: A rapid replacing structure for multi-purpose saw includes an operating mechanism, a clamping mechanism and a collet. The collet is released or clamped by driving the clamping mechanism through the operating mechanism. The structure includes an output shaft having top and bottom openings and defining a chamber. The collet is mounted in the chamber. The clamping mechanism includes a spring, a collet sleeve, and a compressor arm. The collet sleeve is disposed around and movable along an upper portion of the collet. One end of the spring contacts with the bottom wall of the output shaft, while another end contacts with the collet sleeve. The compressor arm includes a top lever, and a top ring integrally formed on a lower end of the top lever and located above the collet sleeve. The top lever of the compressor arm is connected in a contacted manner to the operating mechanism.

Abstract: The present invention proposes a rapid replacing structure for multi-purpose saw, including the operating mechanism, clamping mechanism and collet; the collet is released or clamped by driving the clamping mechanism through the operating mechanism; in addition, the structure also comprises an output shalt whose top and bottom openings form a chamber; the collet is placed in the output shaft; the clamping mechanism comprises a spring element that clings to the outer side of collet, a collet sleeve and a compressor arm; one end of the spring element is connected to the bottom wall of chamber, while the other is connected with the collet sleeve; there is also an output cover designed to limit the compressor arm; the top of compressor arm is connected in a contacted manner to the operating mechanism by passing through the output cover; the operating mechanism pushes the compressor arm down to drive the collet sleeve to move downward, thereby releasing the collet; in addition, a tension board is arranged in the co

Abstract: The utility model discloses a battery powered long-lever sander. The battery powered long-lever sander includes a sander head assembly and a handle. The sander head assembly is connected to the handle and includes a housing and a sanding disc that is disposed in the housing. The battery powered long-lever sander further includes a driving system connected to the sanding disc and configured to drive the sanding disc to run. The driving system is electrically connected to a driving power source, and the driving power source is a battery pack so that the sander can be used without limitations of plugging of a power wire and thus can be used more conveniently.