A permanent magnet push-pull structure magnetically driven juice extractor without shaft seal

Abstract

The invention provides a permanent magnet push-pull structure magnetically driven juice extractor without a shaft seal structure, which includes a base, a cup body, a motor arranged in the base, a screw rod located in the cup body, and a cup cover located at the top of the cup body. The output shaft of the motor is fixedly connected with the magnetic coupling frame, the cup body is buckled upside down on the base and the magnetic coupling frame, one end of the screw rod is connected with the cup cover, and the other end is connected with the bottom shaft, and an inner shaft is set in the bottom shaft. The magnetic poles are correspondingly provided with the outer magnetic poles in the magnetic coupling. When the motor is running, the screw is rotated through the magnetic drive between the outer magnetic poles and the outer conductive magnets and the inner conductive magnets and the inner magnetic poles. The bottom shaft and the screw are also provided with Protect the cover; the invention transmits the torque by applying the magnetic force of the magnetic material to the radial direction of the screw to drive the screw to rotate. At the same time, the screw seal is adopted to effectively prevent the fruit residue from entering the bearing area and the magnet area.

Description

technical field [0001] The invention relates to the field of juice extractors, in particular to a juice extractor which utilizes the magnetic force of a magnetic material to transmit torque to drive a juice extraction screw to rotate. Background technique [0002] Nowadays, the juice extractors on the market are mainly divided into two types according to the driving mode, one is the traditional mechanical drive form, and its main structure generally includes a motor prime mover, a rotating shaft transmission part, a cup body and a juicer screw working machine. This kind of structure usually sets a seal ring because the rotating shaft in the transmission connection part needs to pass through the cup body, so it is not easy to disassemble and clean; and due to the aging effect of the seal ring, the linkage part and the working The dynamic sealing structure between machines will be extremely unreliable, causing juice leakage such as "running, popping, dripping, and leaking". ...

AI Technical Summary

Problems solved by technology

[0004] 1) The magnetic energy utilization rate of the permanent magnet material is low; since this type of disc magnetic circuit structure only utilizes the magnetic attraction force of the magnetic material to transmit torque, and its magnet structure is arranged as a dispersed magnet or a single magnetic integrated structure, its transmission The transferable torque is relatively small;

[0005] 2) This type of structure is unstable during operation; because this type of structure is a special magnetic transmission method, it is usually not provided with a rolling bearing and replaced by a guide bearing, but the guide bearing structure is usually blocked by the residue left by the juicer The flow path between the guide bearing and the bearing will cause shaft lockup accidents; on the other hand, due to the lack of squeezed juice in the initial stage of squeezing juice, the fluid lubrication and cooling of the guide bearing will not be sufficient.

Causes the pole area on the juicing screw to rub dry against the base, damaging the poles

However, when using ordinary rolling bearings, the internal balls will be damaged due to the residue entering the bearing and the bearing will be damaged;

[0006] 3) Since the direction of its magnetic force is the axial direction, it always has an additional downward magnetic axial force in the axial direction, so it is easy to damage the seat or shaft

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