Hand-held straight grinder

A hand-held straight grinder, comprising an elastic collet assembly, an output shaft, a clutch assembly and a power assembly, wherein

• the elastic collet assembly contains an elastic collet and a collet connector, and a tail of the elastic collet is connected to a front end of the collet connector;
• an opening is formed in one end of the elastic collet, and the opening communicates with an internal space of the elastic collet;
• one end of the output shaft is in transmission connection to the power assembly, and the other end of the output shaft axially sleeves the elastic collet assembly in a sliding manner, and is radially and fixedly connected to the elastic collet assembly;
• the other end initially extends to the opening, and the opening is in a radial contracted or expanded state through cooperation;
• the clutch assembly comprises a toggling unit, a first clutch unit and a second clutch unit, wherein
• the toggling unit is located between the first clutch unit and the second clutch unit, and when the toggling unit moves, the elastic collet can be driven through the first clutch unit to axially move relative to the output shaft, whereby the opening is in the radial expanded state;
• and the toggling unit also receives restoring force from the second clutch unit when moving.