WO2020147614A1

WO2020147614A1 - Magnetically driven food processor

Info

Publication number: WO2020147614A1
Application number: PCT/CN2020/070619
Authority: WO
Inventors: Tao NI; Lumeng TANG
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co., Ltd.
Priority date: 2019-01-14
Filing date: 2020-01-07
Publication date: 2020-07-23
Also published as: CN110151014A; KR20210107873A; EP3911208A4; EP3911208A1

Abstract

A magnetically driven food processor, comprising a machine base (1) and a food processing container (2) provided at the machine base (1), inside the food processing container (2) being provided a grinding assembly (3), inside the machine base (1) being provided an electric motor (10) that drives the grinding assembly (3) to rotate. The grinding assembly (3) is provided with a magnetically conductive member (4), and the electric motor (10) is provided with an electromagnetic assembly (12) adapted to the magnetically conductive member (4), and inside the machine base (1) is provided a carbon brush assembly (13) that controls power-on and power-off of the electromagnetic assembly (12). By controlling power-on and power-off of the electromagnetic assembly through the carbon brush assembly provided inside the machine base, makes the circuit control of the electromagnetic assembly, which is adapted to the magnetically conductive member and located above the electric motor, more flexible and reliable, and guarantees safe use of the product.

Description

Magnetically Driven Food Processor

Field of the Invention

The invention relates to the field of small household electrical appliances and in particular to a magnetically driven food processor.

Background of the Invention

In an existing magnetically driven food processor, since a blade disk provided on a container is attracted by means of a magnetic disk provided on a main unit, when a motor on the main unit rotates and drives a blade on the blade disk to rotate, the container will be attracted once it is placed onto the main unit due to the magnetic force, and it will be very difficult to remove the container directly, which causes inconvenience. As an improvement, an electromagnet is used to achieve the control of magnetic driving. Because an electromagnet has the property that it generates magnetic force only in a power-on state and acts like an ordinary iron mass in a power-off state, it is necessary to wire the electromagnet itself due to the fact that the electromagnet needs to be powered in order to be magnetic. Due to the requirements of a magnetically driven cell wall breaking machine, the electromagnet needs to be mounted above an electric motor. Thus, when the machine is in operation, the wiring on the electromagnet will be pulled apart, causing the performance of the machine to be unstable.

Summary of the Invention

The invention provides a magnetically driven food processor.

According to a first aspect of the application, a magnetically driven food processor is provided, comprising a machine base and a food processing container provided at the machine base, inside the machine base being provided an electric motor, inside the food processing container being provided a grinding assembly, the grinding assembly being provided with a magnetically conductive member, the electric motor being provided with an electromagnetic assembly adapted to the magnetically conductive member, and inside the machine base being provided a carbon brush assembly that controls power-on and power-off of the electromagnetic assembly.

Preferably, the electromagnetic assembly comprises an electromagnet, a first conductive sheet electrically connected to a first surface of the electromagnet, and a second conductive sheet electrically connected to a second surface of the electromagnet; the first surface and the second surface are opposite to each other; the carbon brush assembly comprises a first carbon brush assembly abutting against the first conductive sheet and a second carbon brush assembly abutting against the second conductive sheet.

Preferably, the first carbon brush assembly and the second carbon brush assembly are provided, preferably symmetrically, at ends in a radial direction of the electromagnet.

Preferably, the machine base is provided with a first mounting part for accommodating the first carbon brush assembly and a second mounting part for accommodating the second carbon brush assembly.

Preferably, the first carbon brush assembly comprises a carbon brush and a carbon brush holder fixing the carbon brush, inside the carbon brush holder being provided an elastic member that pushes the carbon brush to move.

Preferably, the carbon brush holder comprises a main body and a lug formed by prolongation from the main body, the lug being provided with a first through hole; the machine base is provided with a first mounting part for accommodating the first carbon brush assembly, the first mounting part being provided with a mounting hole corresponding to the first through hole; a fastening member passes through the first through hole and the mounting hole to fixedly maintain the first carbon brush assembly inside the first mounting part.

Preferably, the carbon brush holder is provided with a first position limiting member and a second position limiting member, between which an accommodating cavity is formed; a position limiting pin that can be inserted inside the accommodating cavity extends downward inside the first mounting part; once the first carbon brush assembly is assembled to the first mounting part, the position limiting pin is placed inside the accommodating cavity.

Preferably, the first carbon brush assembly and the second carbon brush assembly have the same structural features.

Preferably, the first conductive sheet is a ring-shaped structure provided at an upper end face of the electromagnet or a sheet-shaped structure provided at an upper surface of the electromagnet, and the second conductive sheet is a ring-shaped structure provided at a lower end face of the electromagnet or a sheet-shaped structure provided at a lower surface of the electromagnet, preferably the first conductive sheet and the second conductive sheet have different structures.

Preferably, a conductive coil is provided to externally surround the electromagnet, of which one end is connected to the first conductive sheet and the other end is connected to the second conductive sheet, preferably by welding or adhering.

Preferably, inside the machine base is provided a circuit control board to which the electric motor and the carbon brush assembly are respectively electrically connected.

Preferably, the first carbon brush assembly is connected to a positive pole of the circuit control board, and the second carbon brush is connected to a negative pole of the circuit control board.

Preferably, the assembly hole comprises a first assembly hole that has a bore diameter matching a shaft diameter of the electric motor shaft, and a second assembly hole that communicates with the first assembly hole and is located above the first assembly hole, inside the second assembly hole being provided a fastening member that assembles and fixes the electric motor shaft with the electromagnet.

Preferably, the food processing container comprises a container base and a container body provided at the container base, the container base being provided with an assembly part inside which the magnetically conductive member is fixedly maintained, the grinding assembly comprising a blade shaft and a blade provided at a top end of the blade shaft, the magnetically conductive member being provided with an accommodating part inside which a tail end of the blade shaft is accommodated.

Preferably, the blade shaft and an electric motor shaft of the electric motor are coaxially provided.

Preferably, the container base is provided with a first coupler, the machine base is provided with a second coupler adapted to the first coupler, and the food processing container is provided with a container lid capable of controlling turn-on and turn-off of electrical circuit of the first coupler with the second coupler, the connection of the electric motor with the circuit control board being turned on once the container lid is fit on the food processing container.

It can be seen from the technical solutions described above that the invention, by controlling power-on and power-off of the electromagnetic assembly through the carbon brush assembly provided in the machine base, makes the circuit control of the electromagnetic assembly, which is adapted to the magnetically conductive member and located above the electric motor, more flexible and reliable, and guarantees safe use of the product.

It should be understood that the above general description and the following detailed description are merely explanatory and illustrative, and cannot limit the invention.

Brief Description of the Drawings

To describe the technical solutions in the embodiments of the invention more clearly, the accompanying drawings that need to be used in describing the embodiments are described briefly below. Obviously, the accompanying drawings described below are merely some embodiments of the invention. A person skilled in the art can obtain other drawings based on those accompanying drawings without any creative work.

Figure 1 is a schematic assembled view in perspective of a magnetically driven food processor of an embodiment of the invention;

Figure 2 is a schematic exploded view in perspective of a magnetically driven food processor of an embodiment of the invention;

Figure 3 is a schematic assembled sectional view in perspective of a magnetically driven food processor of an embodiment of the invention;

Figure 4 is a schematic partial enlarged view of Figure 3;

Figure 5 is a schematic assembled sectional view in perspective from another perspective of a magnetically driven food processor of an embodiment of the invention;

Figure 6 is a schematic assembled view in perspective of an electromagnetic assembly of an embodiment of the invention;

Figure 7 is a schematic assembled view in perspective of an electromagnetic assembly and a carbon brush assembly of an embodiment of the invention;

Figure 8 is a schematic exploded view in perspective of an electromagnetic assembly and a carbon brush assembly of an embodiment of the invention;

Figure 9 is a schematic assembled view in perspective of a first carbon brush assembly of an embodiment of the invention;

Figure 10 is a schematic exploded view in perspective of a food processing container of an embodiment of the invention;

Figure 11 is a simplified circuit diagram of a carbon brush assembly of an embodiment of the invention.

Reference signs:

magnetically driven food processor 100;

machine base 1; electric motor 10; electric motor shaft 11;

electromagnetic assembly 12; electromagnet 120; assembly hole 1201;

first assembly hole 1202; second assembly hole 1203; fastening member 1204;

first conductive sheet 121; second conductive sheet 122; conductive coil 123;

carbon brush assembly 13; first carbon brush assembly 14; carbon brush 140;

carbon brush holder 141; carbon brush body 142; Lug 143

first through hole 144; first position limiting member 145; second position limiting member 146;

accommodating cavity 147; second carbon brush assembly 15; circuit control board 16;

first mounting part 17; position limiting pin 171;

second mounting part 18; second coupler 19;

food processing container 2; container base 20; container body 21;

assembly part 201; first coupler 22;

grinding assembly 3; blade shaft 30; blade 31;

magnetically conductive member 4; accommodating part 40;

container lid 5.

Detailed Description of the Invention

The illustrative embodiments shown in the accompanying drawings will be described in detail here. In the description below, when it refers to the accompanying drawings, the same reference signs in different drawings indicate the same or similar elements, unless otherwise indicated. The implementations described in the illustrative embodiments below do not represent all the implementations in accordance with the invention. To the contrary, they are merely examples of devices and methods in accordance with some aspects of the invention as described in detail in the appended claims.

The terms used in the invention are merely for the purpose of describing specific embodiments, instead of limiting the invention. Singular forms such as “a/an” , “the” and “this” used in the invention and the appended claims are also intended to include the plural form, unless otherwise specified by the context clearly. It should be also understood that, the term “and/or” used herein means any or all possible combinations including one or more related items of the listed terms.

It should be understood that, although the invention may use terms such as “first” , “second” and “third” etc. to describe various types of information, these types of information are not limited to the above-mentioned terms. The terms are merely used to distinguish information of the same type from each other. For example, without departing from the scope of the invention, a first information can also be referred to as a second information. Similarly, a second information can also be referred to as a third information. Depending on the context, terms like “if” used herein can be interpreted as “when…” or “in the event that…” or “in response to the determination that…” .

A magnetically driven food processor of the invention is described in detail below in conjunction with the accompanying drawings. The features in the embodiments and implementations described below can be combined with each other, provided that there is no conflict.

Reference is now made to Figures 1 to 11, the application provides a magnetically driven food processor 100, comprising a machine base 1 and a food processing container 2 provided on the machine base 1. Inside the food processing container 2 is provided a grinding assembly 3. Inside the machine base 1 is provided an electric motor 10.The grinding assembly 3 is provided with a magnetically conductive member 4. The electric motor 10 is provided with an electromagnetic assembly 12 adapted to the magnetically conductive member 4. The electric motor 10 drives the grinding assembly 3 to rotate. Inside the machine base 1 is further provided a carbon brush assembly 13 that controls power-on and power-off of the electromagnetic assembly 12. By controlling power-on and power-off of the electromagnetic assembly 12 by means of the carbon brush assembly 13, the circuit control of the electromagnetic assembly 12 becomes more flexible and reliable, has a simple structure and guarantees safe use of the product.

In an embodiment, the electromagnetic assembly 12 comprises an electromagnet 120, a first conductive sheet 121 electrically connected to a first surface of the electromagnet 120, and a second conductive sheet 122 electrically connected to a second surface of the electromagnet 120. A conductive coil 123 is provided to externally surround the electromagnet 120. One end of the conductive coil 123 is connected to the first conductive sheet 121, and the other end is connected to the second conductive sheet 122. The first surface and the second surface are opposite to each other. The first surface and the second surface can be an upper surface and a lower surface of the electromagnet, or an upper end face and a lower end face of a side wall of the electromagnet. Specifically, the first conductive sheet 121 and the second conductive sheet 122 can be welded to the first surface and the second surface of the electromagnet.

The first conductive sheet 121 can be a ring-shaped structure provided at an upper end face of the electromagnet 120, or a sheet-shaped structure provided at an upper surface of the electromagnet 120. An end of the sheet-shaped structure is bent to form a connecting part to cover at a side wall face of the electromagnet. An end of the conductive coil 123 is welded or adhered to the connecting part. The second conductive sheet 122 can be a ring-shaped structure provided at a lower end face of the electromagnet 120, or a sheet-shaped structure provided at a lower surface of the electromagnet 120.

Indeed, the first conductive sheet 121 and the second conductive sheet 122 can have different structures. The first conductive sheet 121 and the second conductive sheet 122 can be of a material chosen from copper, iron or alloys. Around the periphery of the electromagnet 120 is provided the conductive coil 123. The conductive coil 123 is copper wire. In the application, the two ends of the conductive coil 123 are fixed together with, respectively, the first conductive sheet 121 and the second conductive sheet 122 by welding or adhering. Thus, so long as the first conductive sheet 121 and the second conductive sheet 122 are power-on, the entire electromagnet 120 will be in a power-on state. Since there is no direct wiring from the electromagnet 120, there will be no interference no matter how the electromagnet 120 rotates, thus solving the problem of being difficult to supply an electromagnet 120 with power in a conventional structure.

Inside the machine base 1 is provide a circuit control board 16, to which the electric motor 10 and the carbon brush assembly 13 are respectively electrically connected.

The carbon brush assembly 13 comprises a first carbon brush assembly 14 abutting against the first conductive sheet 121 and a second carbon brush assembly 15 abutting against the second conductive sheet 122. The first carbon brush assembly 14 and the second carbon brush assembly 15 have the same structural features. The structure of the first carbon brush assembly 14 is described below as an example.

The first carbon brush assembly 14 comprises a carbon brush 140 and a carbon brush holder 141 fixing the carbon brush 140. Inside the carbon brush holder 141 is provided an elastic member (not illustrated) that pushes the carbon brush 140 to move. The carbon brush holder 141 comprises a main body 142 and a lug 143 formed by prolongation from the main body 142. The lug 143 is provided with a first through hole 144.

The machine base 1 is provided with a first mounting part 17 for accommodating the first carbon brush assembly 14 and a second mounting part 18 for accommodating the second carbon brush assembly 15. The first mounting part 17 is provided with a mounting hole (not illustrated) corresponding to the first through hole 144. A fastening member passes through the first through hole 144 and the mounting hole to fixedly maintain the first carbon brush assembly 14 inside the first mounting part 17. Further, the carbon brush holder 141 is provided with a first position limiting member 145 and a second position limiting member 146, between which an accommodating cavity 147 is formed. A position limiting pin 171 that can be inserted inside the accommodating cavity 147 extends downward inside the first mounting part 17. Once the first carbon brush assembly 14 is assembled to the first mounting part 17, the position limiting pin 171 is placed inside the accommodating cavity 147 to strengthen the stability of the assembly of the first carbon brush assembly 14 with the first mounting part 17, ensuring the reliability of the abutting of the first carbon assembly 14 against the electromagnetic assembly 12. The second mounting part 18 has the same structure as the first mounting part 17 and is not described further here.

The first carbon brush assembly 14 is connected to a positive pole of the circuit control board 16, and the second carbon brush assembly 15 is connected to a negative pole of the circuit control board 16. The food processing container 2 comprises a container base 20 and a container body 21 provided at the container base 20. The container base 20 is provided with an assembly part 201. Specifically, the container base comprises a main body and a base plate assembled to the main body. The assembly part 201 is provided at the center of the base plate. The magnetically conductive member 4 is fixedly maintained inside the assembly part 201. The grinding assembly 3 comprises a blade shaft 30 and a blade 31 provided at a top end of the blade shaft 30. The magnetically conductive member 4 is provided with an accommodating part 40, inside which a tail end of the blade shaft 30 is accommodated.

The container base 20 is provided with a first coupler 22, and the machine base 1 is provided with a second coupler 19 adapted to the first coupler 22. The food processing container 2 is provided with a container lid 5 capable of controlling turn-on and turn-off of electrical circuit of the first coupler with the second coupler. Once the container lid 5 is fit on the food processing container 2, the connection of the electric motor 10 with the circuit control board 16 is turned on.

The first carbon brush assembly 14 and the second carbon brush assembly 15 are connected, respectively, to the circuit control board 16. Once the food processing container 2 is placed on the machine base 1, the first coupler 22 triggers the second coupler 19, and the circuit control board 16 is controlled by means of a preset program of the circuit control board 16 to start to supply power to the carbon brush assembly 13. When the carbon brush assembly 13 is power-on, the first conductive sheet 121 and the second conductive sheet 122 will be power-on instantaneously. Due to the properties of the electromagnet 120, the electromagnetic assembly 12 instantaneously generates a magnetic force and can immediately be in operation. When the operation is completed or it is in a standby state, the power supplying to the carbon brush assembly 13 is stopped by a preset program. The electromagnet 120 immediately demagnetizes. Thus, the food processing container 2 can be removed from the machine base 1 easily.

At the center of the electromagnet 120 is provided an assembly hole 1201. An electric motor shaft 11 of the electric motor 10 passes through the assembly hole 1201 to assemble with the electromagnetic assembly 12, so that the electromagnet 120 rotates with the rotation of the electric motor 10. The assembly hole 1201 comprises a first assembly hole 1202 and a second assembly hole 1203. The first assembly hole 1202 has a bore diameter matching a shaft diameter of the electric motor shaft. The second assembly hole 1203 communicates with the first assembly hole 1202 and is located above the first assembly hole 1202. Inside the second assembly hole 1203 is provided a fastening member 1204 that assembles and fixes the electric motor shaft with the electromagnet.

The blade shaft 30 and the electric motor shaft 11 which are coaxially provided allow to enhance the energy efficiency of the product to a maximum extent. Of course, in the application, the blade shaft 30 and the electric motor shaft 11 can be provided non-coaxially, however this solution has a certain loss in energy conversion.

The first carbon brush assembly 14 and the second carbon brush assembly 15 are provided at ends in a radial direction of the electromagnet 120. In this embodiment, the first carbon brush assembly 14 and the second carbon brush assembly 15 are provided symmetrically at ends of the electromagnet 120. The first carbon brush assembly 14 and the second carbon brush assembly 15 being provided symmetrically can ensure that in the same operating conditions, the magnetic force of the electromagnet is the strongest.

What have been described above are merely relatively preferred embodiments of the invention, and are not to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the invention shall fall within the scope of protection of the invention.

Claims

A magnetically driven food processor, comprising a machine base (1) and a food processing container (2) provided at the machine base (1) , inside the machine base (1) being provided an electric motor (10) , inside the food processing container (2) being provided a grinding assembly (3) , characterized in that, the grinding assembly (3) is provided with a magnetically conductive member (4) , the electric motor (10) is provided with an electromagnetic assembly (12) adapted to the magnetically conductive member (4) , and inside the machine base (1) is provided a carbon brush assembly (13) that controls power-on and power-off of the electromagnetic assembly (12) .
The magnetically driven food processor according to claim 1, characterized in that: the electromagnetic assembly (12) comprises a electromagnet (120) , a first conductive sheet (121) electrically connected to a first surface of the electromagnet (120) , and a second conductive sheet (122) electrically connected to a second surface of the electromagnet (120) ; the first surface and the second surface are opposite to each other; the carbon brush assembly (13) comprises a first carbon brush assembly (14) abutting against the first conductive sheet (121) and a second carbon brush assembly (15) abutting against the second conductive sheet (122) .
The magnetically driven food processor according to claim 2, characterized in that, the first carbon brush assembly (14) and the second carbon brush assembly (15) are provided, preferably symmetrically, at ends in a radial direction of the electromagnet (120) .
The magnetically driven food processor according to any one of claims 2 to 3, characterized in that, the machine base (1) is provided with a first mounting part (17) for accommodating the first carbon brush assembly (14) and a second mounting part (18) for accommodating the second carbon brush assembly (15) .
The magnetically driven food processor according to any one of claims 2 to 4, characterized in that, the first carbon brush assembly (14) comprises a carbon brush (140) and a carbon brush holder (141) fixing the carbon brush (140) , inside the carbon brush holder (141) being provided an elastic member that pushes the carbon brush (140) to move.
The magnetically driven food processor according to claim 5, characterized in that: the carbon brush holder (141) comprises a main body (142) and a lug (143) formed by prolongation from the main body (142) , the lug (143) being provided with a first through hole (144) ; the machine base (1) is provided with a first mounting part (17) for accommodating the first carbon brush assembly (14) , the first mounting part (17) being provided with a mounting hole corresponding to the first through hole (144) ; a fastening member passes through the first through hole (144) and the mounting hole to fixedly maintain the first carbon brush assembly (14) inside the first mounting part (17) .
The magnetically driven food processor according to claim 5, characterized in that: the carbon brush holder (141) is provided with a first position limiting member (145) and a second position limiting member (146) , between which an accommodating cavity (147) is formed; a position limiting pin (171) that can be inserted inside the accommodating cavity (147) extends downward inside the first mounting part (17) ; once the first carbon brush assembly (14) is assembled to the first mounting part (17) , the position limiting pin (171) is placed inside the accommodating cavity (147) .
The magnetically driven food processor according to any one of claims 2 to 7, characterized in that, the first carbon brush assembly (14) and the second carbon brush assembly (15) have the same structural features.
The magnetically driven food processor according to any one of claims 2 to 8, characterized in that, the first conductive sheet (121) is a ring-shaped structure provided at an upper end face of the electromagnet (120) or a sheet-shaped structure provided at an upper surface of the electromagnet (120) , and the second conductive sheet (122) is a ring-shaped structure provided at a lower end face of the electromagnet (120) or a sheet-shaped structure provided at a lower surface of the electromagnet (120) , preferably the first conductive sheet (121) and the second conductive sheet (122) have different structures.
The magnetically driven food processor according to any one of claims 2-9, characterized in that, a conductive coil (123) is provided to externally surround the electromagnet (120) , of which one end is connected to the first conductive sheet (121) and the other end is connected to the second conductive sheet (122) , preferably by welding or adhering.
The magnetically driven food processor according to any one of claims 2-10, characterized in that, inside the machine base (1) is provided a circuit control board (16) to which the electric motor (10) and the carbon brush assembly (13) are respectively electrically connected.
The magnetically driven food processor according to claim 11, characterized in that, the first carbon brush assembly (14) is connected to a positive pole of the circuit control board (16) , and the second carbon brush (15) is connected to a negative pole of the circuit control board (16) .
The magnetically driven food processor according to any one of claims 1 to 12, characterized in that, at a center of the electromagnet (120) is provided an assembly hole (1201) , through which an electric motor shaft (11) of the electric motor (10) passes to assemble with the electromagnetic assembly (12) .
The magnetically driven food processor according to claim 13, characterized in that, the assembly hole (1201) comprises a first assembly hole (1202) that has a bore diameter matching a shaft diameter of the electric motor shaft (11) , and a second assembly hole (1203) that communicates with the first assembly hole (1202) and is located above the first assembly hole (1202) , inside the second assembly hole (1203) being provided a fastening member (1204) that assembles and fixes the electric motor shaft (11) with the electromagnet (120) .
The magnetically driven food processor according to any one of claims 1-14, characterized in that, the food processing container (2) comprises a container base (20) and a container body (21) provided at the container base (20) , the container base (20) being provided with an assembly part (201) inside which the magnetically conductive member (4) is fixedly maintained, the grinding assembly (3) comprising a blade shaft (30) and a blade (31) provided at a top end of the blade shaft (30) , the magnetically conductive member (4) being provided with an accommodating part (40) inside which a tail end of the blade shaft (30) is accommodated.
The magnetically driven food processor according to any one of claims 1-15, characterized in that, the grinding assembly (3) comprising a blade shaft (30) and a blade (31) provided at a top end of the blade shaft (30) , and the blade shaft (30) and an electric motor shaft (11) of the electric motor (10) are coaxially provided.
The magnetically driven food processor according to any one of claims 1-16, characterized in that, the food processing container (2) comprises a container base (20) and a container body (21) provided at the container base (20) , the container base (20) being provided with a first coupler (22) , the machine base (1) is provided with a second coupler (19) adapted to the first coupler (22) , and the food processing container (2) is provided with a container lid (5) capable of controlling turn-on and turn-off of electrical circuit of the first coupler with the second coupler, the connection of the electric motor (10) with the circuit control board (16) being turned on once the container lid (5) is fit to the food processing container (2) .