Grinding device

Abstract

The invention provides a grinding device which comprises a grinding shell, a discharging opening is formed in one side of the grinding shell. a first grinding element and a second grinding element are coaxially arranged in the grinding shell, a grinding gap is formed between the first grinding element and the second grinding element, and the second grinding element rotates relative to the first grinding element so as to grind the raw materials to be ground in the grinding gap; a propelling wheel is connected to the lower portion of the second grinding element so as to drive the second grinding element to rotate, and the rotation of the propelling wheel can push the ground raw materials from the grinding gap to the discharging opening; a driving assembly is arranged below the grinding shell, and the driving assembly is connected with the propelling wheel in a torque transmission manner; the propelling wheel and the driving assembly comprise a torque connecting part, the grinding shell is provided with a through hole for the torque connecting part to penetrate through, the torque connecting part is radially supported on the grinding shell through a fixed supporting piece, a rolling supporting piece is arranged between the propelling wheel and the grinding shell, and the rolling supporting piece provides at least axial support for the propelling wheel.

Description

technical field [0001] The invention relates to a grinding device, in particular a grinding device for grinding coffee beans. Background technique [0002] Coffee is a fashionable beverage that is widely favored by consumers. During coffee processing, coffee beans usually need to be ground into coffee powder first, and coffee powder is easily oxidized and emits aroma. In order to fully retain the aroma of coffee, coffee beans are automatically ground Advanced automatic coffee machines are becoming more and more popular among ordinary consumers. [0003] like figure 1 As shown, the bean grinding device used for grinding coffee beans in the prior art generally includes a motor 11, a gearbox part 12 and a bean grinding assembly. The motor 11 outputs power to the bean grinding assembly through the gear box part 12. The bean grinding assembly includes The upper grinder 14 and the lower grinder 15 arranged in the coffee powder box 17, the lower grinder 15 receives the power outp...

AI Technical Summary

Problems solved by technology

[0004] In order to ensure the coaxiality of the upper and lower grinding knives, it is necessary to ensure the accuracy of all matching parts. The cumulative error is large, and the coaxiality of the upper and lower grinding knives cannot be guaranteed, resulting in poor consistency in the grinding degree of the mass-produced grinding sets.

Moreover, the diameter of the steel ball fixing seat is relatively large, and when bearing axial force (when grinding beans), the center position of the steel ball fixing seat will creep, and the sinking of the lower grinding knife will cause the distance between the upper and lower grinding knives to become larger. Uneven fineness of the ground powder

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