Portable appliances, such as food processors and blenders, are known to have a magnetic coupler system that allows for magnetic coupling between a motor-driven rotor in a base portion of the appliance and a rotor disposed in the base portion of a jar or receptacle that is received on the appliance base. Such an apparatus can create unnecessary noise by have rotating, or otherwise moving, mechanical parts in the base of the appliance that further rotate a blade assembly and associated coupler in a receptacle received on the appliance. Thus, a magnetic coupling system is desired wherein the rotor within the receptacle jar has permanent magnets that are driven by a stator within the base of the appliance, such that there are no moving parts with the base of the appliance. This type of system eliminates noise while still adequately powering the appliance. The stator can be disposed beneath the jar as received on the appliance, or can be configured around the base of the jar in a set-in configuration.
One aspect of the present invention includes a blending appliance having a housing with a jar receiving portion defined between an upper housing and a base portion laterally extending from the housing. A blender jar, having a jar base and a receptacle portion, is configured to be laterally received within the jar receiving portion of the housing. A magnetic coupling system is part of the blending appliance and includes a rotatable magnetic coupler disposed in the jar base of the blender jar and a stator disposed in the base portion of the housing. The stator is configured to generate an electromagnetic field to magnetically rotate the rotatable magnetic coupler within the jar base. A blade assembly is disposed in the receptacle portion of the jar and is coupled to a drive shaft which is further coupled to the rotatable magnetic coupler for rotation therewith.
These and other features, advantages, and objects of the present invention will be further understood and appreciated by those skilled in the art by reference to the following specification, claims, and appended drawings.
For purposes of description herein, the terms “upper,” “lower,” “right,” “left,” “rear,” “front,” “vertical,” “horizontal,” and derivatives thereof shall relate to the concept as oriented in
Referring now to
As further shown in
The stator 52 is mounted on a mounting bracket 70 disposed within the base portion 18 of the blending appliance 10. The stator 52 includes a series of laminations 72, 74 that are wrapped with wires 76 to form coils or windings 78, 80. The stator 52 produces an electronically controlled rotating electromagnetic field, indicated by arrow R1, by currents producing alternating poles within the adjacent coils 78, 80. Essentially, the stator 52 creates a pole that is capable of driving the rotatable magnetic coupler 54, in the jar base 26 from a South pole to a North pole in a direction as indicated by arrow R2. This rotational movement R2 is entirely driven by magnetic attraction between the rotating electromagnetic field created by the stator 52 and permanent magnets M1, M2 disposed in the rotatable magnetic coupler 54. In this way, the drive shaft 56 rotates with the rotatable magnetic coupler 54 to further drive the blade assembly 30, disposed within the receptacle portion 22 of the blender jar 20, through a magnetic torque coupling derived from the stator 52, rather than a conventional mechanical coupling.
As further shown in
It is further contemplated that a braking system may be disposed between the bearing assembly 60 and the rotatable magnetic coupler 54. The braking system is configured to stop rotation of the rotatable magnetic coupler 54 when the blender jar 20 is removed from the blending appliance 10. In other systems, the blade assembly may continue to rotate after a jar is quickly removed from a slide-in system. This can be dangerous for the user. The brake system, by stopping the rotation of the rotatable magnetic coupler 54, will also stop the rotation of the drive shaft 56 and blade assembly 30 coupled thereto for safer use.
Referring now to
In the embodiment shown in
It is contemplated that the different embodiments of the stators 52 and 52A of the respective magnetic coupling systems 50, 50A described above may be powered by different means. Specifically, the stators 52 and 52A, in conjunction with their respective rotatable magnetic couples 54, define a motor that can be an AC or DC brushless motor, an induction motor, a switched reluctance motor, or other like electric motor capable of producing an electromagnetic field for powering the blending sequences of the blending appliances 10, 10A.
It is also important to note that the construction and arrangement of the elements of the concept as shown in the exemplary embodiments is illustrative only. Although only a few embodiments of the present innovations have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited. For example, elements shown as integrally formed may be constructed of multiple parts or elements shown as multiple parts may be integrally formed, the operation of the interfaces may be reversed or otherwise varied, the length or width of the structures and/or members or connector or other elements of the system may be varied, the nature or number of adjustment positions provided between the elements may be varied. It should be noted that the elements and/or assemblies of the system may be constructed from any of a wide variety of materials that provide sufficient strength or durability, in any of a wide variety of colors, textures, and combinations. Accordingly, all such modifications are intended to be included within the scope of the present innovations. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the desired and other exemplary embodiments without departing from the spirit of the present innovations.
It will be understood that any described processes or steps within described processes may be combined with other disclosed processes or steps to form structures within the scope of the present concept. The exemplary structures and processes disclosed herein are for illustrative purposes and are not to be construed as limiting.
It is also to be understood that variations and modifications can be made on the aforementioned structures and methods without departing from the concepts of the present concept, and further it is to be understood that such concepts are intended to be covered by the following claims unless these claims by their language expressly state otherwise.
This application claims priority to and the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Patent Application No. 61/985,018, filed Apr. 28, 2014, entitled “LOW PROFILE MOTOR FOR PORTABLE APPLIANCES,” which is hereby incorporated herein by reference in its entirety.
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