Reciprocating type electric tool

Abstract

A reciprocating type electric tool comprises a motor and a transmission mechanism. The transmission mechanism comprises a reciprocating mechanism and a balance mechanism. The reciprocating mechanism comprises an eccentric gear driven by the motor and a reciprocating rod assembly connected to the eccentric gear, and the reciprocating rod assembly reciprocates in the longitudinal direction. The balance assembly comprises a transmission gear located on the rear side of the eccentric gear and a balance assembly body connected to the transmission gear. The motor drives the transmission gear and theeccentric gear to rotate at the same time, and the transmission gear drives the balance assembly body to reciprocate in the direction opposite to that of the reciprocating rod assembly in the longitudinal direction. The reciprocating assembly and the balance assembly are equal in inertia force and opposite in direction, and therefore the resultant force of the reciprocating assembly and the balance assembly is zero. The centroid movement tracks of the reciprocating rod assembly and the balance assembly are on the same straight line, and therefore no extra moment can be generated while the inertia force is eliminated. In other words, vibration can be zero theoretically, and therefore vibration is completely eliminated.

Description

[technical field] [0001] The invention relates to the technical field of electric tools, in particular to a vibration-eliminating reciprocating electric tool. [Background technique] [0002] Reciprocating motion mechanisms are used in many mechanical products, such as reciprocating saws, jigsaws, etc.; in such mechanical products, the working mechanism will generate a large inertial force due to reciprocating motion. If the inertial force cannot be effectively obtained during the operation of the mechanism Elimination will cause the entire mechanism to produce an unbalanced force, thereby bringing vibration and impact to the machine, seriously affecting the user's comfort and the service life of the mechanism. At present, in general reciprocating products, structures that generate opposite inertial forces are designed in the reciprocating direction of the mechanism, thereby weakening the imbalance caused by inertial forces to a certain extent, but these structures themselves...

AI Technical Summary

Problems solved by technology

[0002] Reciprocating motion mechanisms are used in many mechanical products, such as reciprocating saws, jigsaws, etc.; in such mechanical products, the working mechanism will generate a large inertial force due to reciprocating motion. If the inertial force cannot be effectively obtained during the operation of the mechanism Elimination will cause an unbalanced force in the whole mechanism, which will bring vibration and shock to the machine, seriously affecting the comfort of the user and the service life of the mechanism

At present, in general reciprocating products, structures that generate opposite inertial forces are designed in the reciprocating direction of the mechanism, thereby weakening the imbalance caused by inertial forces to a certain extent, but these structures themselves will also generate new inertial forces in other directions. force, which brings new unbalanced forces, and also has a greater influence on

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