Grinding device

Patent metadata

Field	Value
Publication number	US-11291335-B2
Application number	US-202016746956-A
Country	US
Kind code	B2
Filing date	Jan 19, 2020
Priority date	Feb 1, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A grinding device includes a grinding mechanism, a driving mechanism capable of driving the grinding mechanism to operate, and a grinding seat located between the grinding mechanism and the driving mechanism. The grinding mechanism includes a rotating shaft unit inserted in and protruded from the grinding seat to be rotatably connected to the driving mechanism, an inner grinding unit sleeved on the rotating shaft unit, and an outer grinding unit surrounding and spaced from the inner grinding unit. The driving mechanism is able to drive the rotating shaft unit to bring the inner grinding unit to rotate and grind the substance to be ground in cooperation with the outer grinding unit. The grinding mechanism further includes a supporting unit sleeved on and abutted against the rotating shaft unit.

First claim

What is claimed is:

1. A grinding device comprising a grinding mechanism, a driving mechanism capable of driving the grinding mechanism to operate, and a grinding seat, the grinding mechanism being located inside the grinding seat, the grinding mechanism comprising a rotating shaft unit inserted in and protruded downwardly from the grinding seat to be rotatably connected to the driving mechanism, an inner grinding unit sleeved on and fixed to the rotating shaft unit, an outer grinding unit surrounding and spaced from the inner grinding unit, the grinding mechanism further comprising a supporting unit sleeved on and abutted against the rotating shaft unit, the supporting unit comprising a first bearing located above and spaced from the inner grinding unit along an axial direction of the rotating shaft unit and a second bearing located below and spaced from the inner grinding unit along the axial direction of the rotating shaft unit, the first bearing defining a first supporting hole therein, the second bearing defining a second supporting hole therein, a top end of the rotating shaft unit rotationally inserted in the first supporting hole, a bottom end of the rotating shaft unit rotationally inserted in the second supporting hole, wherein the driving mechanism is located below the grinding mechanism, the driving mechanism is provided with an assembling hole located under the second supporting hole, the bottom end of the rotating shaft unit is further detachably inserted into the assembling hole, and the supporting unit further comprises a first supporting seat detachably assembled and connected to the grinding seat, so that the grinding mechanism is able to be upwardly detached from or reassembled to the grinding seat;
wherein the driving mechanism drives the rotating shaft unit to rotate in the first supporting hole and the second supporting hole, with the top end and the bottom end of the rotating shaft unit being respectively abutted against and supported by the first bearing and the second bearing, and rotating shaft unit brings the inner grinding unit to rotate to cause the inner grinding unit to grind the substance to be ground in cooperation with the outer grinding unit.

2. The grinding device of claim 1 , wherein the supporting unit further comprises a first supporting assembly connected to the first supporting seat and sleeved on the rotating shaft unit.

3. The grinding device of claim 2 , wherein the supporting unit further comprises a second supporting assembly assembled to the first supporting seat and inserted by the rotating shaft unit, the second supporting assembly is sleeved on the rotating shaft unit.

4. The grinding device of claim 3 , wherein the second supporting assembly comprises the second bearing defining the second supporting hole and a second supporting seat fixedly assembled to the first supporting seat and supporting the second bearing, the inner grinding unit and the outer grinding unit are received in the second supporting seat, the second supporting seat is received in the grinding seat, so that the second supporting seat is located between the outer grinding unit and the grinding seat.

5. The grinding device of claim 4 , wherein the grinding mechanism further comprises a powder cleaning unit received in the second supporting seat and located under the inner grinding unit, the powder cleaning unit is sleeved on and fixed to the rotating shaft unit so that the rotating shaft unit brings the powder cleaning unit to rotate when the driving mechanism drives the rotating shaft unit to rotate.

6. The grinding device of claim 5 , wherein the second supporting seat comprises a bottom base used for the second bearing to be inserted into, and a peripheral wall extending upwards from the bottom base, the bottom base is cooperated with the peripheral wall to define a receiving space for receiving the inner grinding unit, the outer grinding unit and the powder cleaning unit.

7. The grinding device of claim 6 , wherein a plurality of assembling grooves which are spaced from each other and inverted L-shaped are formed at a bottom of the first supporting seat, the second supporting seat further comprises a plurality of assembling blocks extending radially outwards from the peripheral wall, the assembling blocks are fixedly embedded in the assembling grooves, respectively.

8. The grinding device of claim 6 , wherein the second supporting seat further comprises an annular seat extending downwards from the bottom base, the second bearing is inserted and fixed in the annular seat.

9. The grinding device of claim 6 , wherein the powder cleaning unit is located between the bottom base of the second supporting seat and the inner grinding unit along the axial direction of the rotating shaft unit, the powder cleaning unit comprises a rotary member sleeved on and fixed to the rotating shaft unit and a plastic member connected to the rotary member, the plastic member comprises a plurality of films extending outwards and abutting against the bottom base to clean and discharge the powder being ground when the powder cleaning unit rotates with the rotating shaft unit.

10. The grinding device of claim 2 , wherein the first supporting assembly comprises the first bearing defining the first supporting hole and a first supporting member fixedly connected to the first supporting seat and supporting the first bearing.

11. The grinding device of claim 10 , wherein the rotating shaft unit comprises a first shaft part inserted in the first supporting hole, an opposite second shaft part inserted in the second supporting hole and the assembling hole, and a connecting shaft part connected between the first shaft part and the second shaft part and having an outer diameter larger than the first shaft part, the supporting unit further comprises an elastic member sleeved on the first shaft part and sandwiched between the connecting shaft part and the first bearing of the first supporting assembly.

12. The grinding device of claim 10 , wherein the first supporting member comprises an outer ring fixedly connected to the first supporting seat, an inner ring spaced from the outer ring and provided for the insertion and fixing of the first bearing, and a plurality of ribs connected between the outer ring and the inner ring.

13. The grinding device of claim 12 , wherein an annular groove is formed at a top of the first supporting seat, a plurality of rib holding grooves extend upwards from the annular groove and are spaced from each other, the outer ring of the first supporting member is fixedly embedded in the annular groove, the ribs of the first supporting member are fixedly embedded in the rib holding grooves respectively.

14. The grinding device of claim 1 , wherein the assembling hole has a polygonal cross section, the rotating shaft unit comprises a first shaft part at the top end of the rotating shaft unit and an opposite second shaft part at the bottom end of the rotating shaft unit, the second shaft part has a polygonal cross section and is detachably inserted into the assembling hole.

15. The grinding device of claim 1 , wherein the first supporting seat comprises a plurality of limiting blocks which extend radially outwards, the grinding seat defines a grinding space provided for the grinding mechanism to install therein and a plurality of limiting grooves formed at a top of the grinding seat by recessing downwardly from top to bottom, the limiting blocks are detachably embedded in the limiting grooves, respectively.

16. The grinding device of claim 1 , wherein the grinding device is mounted in a body of a coffee machine and used f

Assignees

• Tsann Kuen Zhangzhou Entpr Co

Inventors

• Liu Guanyi
• Wei Haozhan
• Xu Chongzhe

Classifications

• A47J42/06 Primary

  mechanically driven · CPC title

• A47J42/46 Primary

  Driving mechanisms; Coupling to drives · CPC title

• A47J31/42

  Beverage-making apparatus with incorporated grinding or roasting means for coffee {(coffee mills A47J42/00; coffee roasters in general A23N12/08)} · CPC title