Anti-overload shredder

Abstract

The invention discloses an overload prevention paper shredder which achieves the aims of low fault rate and long service life. The overload prevention paper shredder comprises a support (9), a motor (2), a first gear (3), a rack (7), a second gear (4), a movable shaft (5), a contact switch (8) and a fixed shaft (6), wherein the motor (2) is fixed on the support (9); the first gear (3) is driven by the motor (2); the rack (7) is meshed with the first gear (3) and is matched with the support (9) in a sliding mode; the second gear (4) is meshed with the rack (7); the movable shaft is coaxially fixed on the second gear (4) in a sleeving mode; the contact switch (8) is fixed on the support (9); the fixed shaft (6) is fixed on the support (9) via a fixing base (11) and the axis of the fixed shaft (6) is parallel to the axis of the movable shaft (5); the length direction of the rack (7) is perpendicular to the movable shaft (5); one side, opposite to the movable shaft (5), of the contact switch (8) is provided with a contact end (10); the shortest distance between the contact end (10) and the movable shaft (5) is less than the shortest distance between the fixed shaft (6) and the movable shaft (5).

Description

technical field [0001] The invention relates to the technical field of shredders, in particular to an overload-proof shredder. Background technique [0002] A shredder consists of a set of rotating blades, a comb and a drive motor. The paper is fed from the middle of the interlocking blades and is divided into many small pieces of paper to achieve the purpose of confidentiality. At present, the machine overload protection function of the paper shredder is to detect whether it is overloaded first and then decide whether to continue to stop working. Generally, when the measured motor torque and current value exceed the rated value, then the motor is controlled to reverse. In fact, when the motor reverses At this time, the transmission system has already withstood the torque required for normal shredding, that is, when the motor reverses, the shredder is already in an overloaded state, so the existing shredders have the problems of high failure rate and short life. Contents ...

AI Technical Summary

Problems solved by technology

At present, the machine overload protection function of the paper shredder is to detect whether it is overloaded first and then decide whether to continue to stop working. Generally, when the measured motor torque and current value exceed the rated value, then the motor is controlled to reverse. In fact, when the motor reverses At this time, the transmission system has already withstood the torque required for normal shredding, that is, when the motor reverses, the shredder is already in an overloaded state, so the existing shredders have the problems of high failure rate and short life

Images