Patent Application
20240041259
The present subject matter relates generally to systems and method of locating the base of a stand mixer to other components during assembly.
Stand mixers are generally used for performing automated mixing, churning, or kneading involved in food preparation. Typically, stand mixers include a motor configured to provide torque to one or more driveshafts. Users may connect various utensils to the one or more driveshafts, including whisks, spatulas, or the like.
During manufacturing of certain stand mixers, the base of the stand mixer appliance is fixed to the main body by a pattern of fasteners. Using the pattern of fasteners can require an operator to loosen all the fasteners, then partially start all of them before doing the final fastening operation in order to avoid interference between the fasteners. In current practice, the locating of the base to the main body is set by the pattern of fasteners using external fixturing, which is difficult and costly for manufacturing.
Aspects and advantages of the invention will be set forth in part in the following description, or may be apparent from the description, or may be learned through practice of the invention.
In one example embodiment, a stand mixer appliance includes a casing that includes a base, a main body mounted to the base, and a motor housing mounted to the main body, extending outwardly above the base. The base includes an aperture, and the main body includes a pin configured to engage with the aperture of the base.
In another example embodiment, a stand mixer appliance includes a casing that includes a second base portion, a main body mounted to the second base portion, and a motor housing mounted to the main body, extending outwardly above the second base portion. The main body includes a column portion and a first base portion. The second base portion includes an aperture, and the first base portion of the main body includes a pin configured to engage with the aperture of the second base portion.
In another example embodiment, a stand mixer appliance includes a casing that includes a second base portion, a main body mounted to the second base portion, and a motor housing mounted to the main body, extending outwardly above the second base portion. The stand mixer appliance also includes a plurality of clearance holes on the second base portion. The main body includes a column portion and a first base portion. The first base portion includes a plurality of fastener holes. The second base portion includes an aperture, and the first base portion of the main body includes a pin configured to engage with the aperture of the second base portion. The pin of the first base portion engages with the aperture of the second base portion to align the plurality of clearance holes with the plurality of fastener holes.
These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
A full and enabling disclosure of the present invention, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures.
Repeat use of reference characters in the present specification and drawings is intended to represent the same or analogous features or elements of the present invention.
Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
As used herein, the terms “includes” and “including” are intended to be inclusive in a manner similar to the term “comprising.” Similarly, the term “or” is generally intended to be inclusive (i.e., “A or B” is intended to mean “A or B or both”). Approximating language, as used herein throughout the specification and claims, is applied to modify any quantitative representation that could permissibly vary without resulting in a change in the basic function to which it is related. Accordingly, a value modified by a term or terms, such as “about,” “approximately,” and “substantially,” are not to be limited to the precise value specified. In at least some instances, the approximating language may correspond to the precision of an instrument for measuring the value. For example, the approximating language may refer to being within a ten percent (10%) margin.
Stand mixer 100 may include a casing 101. Casing 101 may include a motor housing 102, a base 104, and a column 106. Motor housing 102 may house various mechanical and/or electrical components of stand mixer 100, which will be described in further detail below. For example, as shown in
A drivetrain 110 may be provided within motor housing 102 and is configured for coupling motor 112 to a shaft 109 (e.g., a mixer shaft), such that shaft 109 is rotatable via motor 112 through drivetrain 110. Drivetrain 110 may include gearbox 114, bevel gearbox 116, etc. An opening 132 for a horizontal accessory shaft 130 may align with the rotational axis of motor 112. Mixer shaft 109 may be positioned above mixing zone 105 on motor housing 102, and an attachment 108, such as a beater, whisk, or hook, may be removably mounted to mixer shaft 109. Attachment 108 may rotate within a bowl (not shown) in mixing zone 105 to beat, whisk, knead, etc. material within the bowl during operation of motor 112.
As noted above, motor 112 may be operable to rotate mixer shaft 109. Motor 112 may be a direct current (DC) motor in certain example embodiments. In alternative example embodiments, motor 112 may be an alternating current (AC) motor. Motor 112 may include a rotor and a stator. The stator may be mounted within motor housing 102 such that the stator is fixed relative to motor housing 102, and the rotor may be coupled to mixer shaft 109 via drivetrain 110. A current through windings within the stator may generate a magnetic field that induces rotation of the rotor, e.g., due to magnets or a magnetic field via coils on the stator. The rotor may rotate at a relatively high rotational velocity and relatively low torque. Thus, drivetrain 110 may be configured to provide a rotational speed reduction and mechanical advantage between motor 112 and mixer shaft 109.
Stand mixer 100 may include a controller 122 provided within casing 101. For example, controller 122 may be located within motor housing 102 of casing 101. Controller 122 may be a microcontroller, as would be understood, including one or more processing devices, memory devices, or controllers. Controller 122 may include a plurality of electrical components configured to permit operation of stand mixer 100 and various components therein (e.g., motor 112). For instance, controller 122 may be a printable circuit board (PCB), as would be well known.
As used herein, the terms “control board,” “processing device,” “computing device,” “controller,” or the like may generally refer to any suitable processing device, such as a general or special purpose microprocessor, a microcontroller, an integrated circuit, an application specific integrated circuit (ASIC), a digital signal processor (DSP), a field-programmable gate array (FPGA), a logic device, one or more central processing units (CPUs), a graphics processing units (GPUs), processing units performing other specialized calculations, semiconductor devices, etc. In addition, these “controllers” are not necessarily restricted to a single element but may include any suitable number, type, and configuration of processing devices integrated in any suitable manner to facilitate appliance operation. Alternatively, controller 122 may be constructed without using a microprocessor, e.g., using a combination of discrete analog and/or digital logic circuitry (such as switches, amplifiers, integrators, comparators, flip-flops, AND/OR gates, and the like) to perform control functionality instead of relying upon software.
Controller 122 may include, or be associated with, one or more memory elements or non-transitory computer-readable storage mediums, such as RAM, ROM, EEPROM, EPROM, flash memory devices, magnetic disks, or other suitable memory devices (including combinations thereof). These memory devices may be a separate component from the processor or may be included onboard within the processor. In addition, these memory devices can store information and/or data accessible by the one or more processors, including instructions that can be executed by the one or more processors. It should be appreciated that the instructions can be software written in any suitable programming language or can be implemented in hardware. Additionally, or alternatively, the instructions can be executed logically and/or virtually using separate threads on one or more processors.
As shown in
First base portion 204 may include at least one pin 202, e.g., that extends downwardly along the vertical direction V from a bottom of first base portion 204. Additionally or alternatively, first base portion 204 may include a plurality of pins 202. For example, in the present example embodiment, first base portion 204 is shown in
As shown in
Referring still to
In the present example embodiment, pins 202 and apertures 302, 304, and 306 may align the plurality of clearance holes 402 and the plurality of fastener holes 400. When pin 202 engages with aperture 302, translation in a horizontal plane (e.g., perpendicular to the vertical direction V) may be restrained. Then, another pin 202 may engage an aperture, such as aperture 304 (the slot-like aperture) which restrains rotation in the horizontal plane. Further, the remaining pin 202 may engage aperture 306 with clearance to aid in the assembly of base assembly 104, without over constraining first base portion 204 and second base portion 300. As such, the pins 202 and apertures 302, 304, 206 act as four-way (4-way) and two-way (2-way) locators, e.g., the four-way (4-way) locators preventing rotation and translation and two-way (2-way) locators preventing rotation. Thus, locating first base portion 204 to second base portion 300 with pins 202 engaging apertures 302, 304, and 306 may remove the need for external fixturing in order to properly align second base portion 300 to first base portion 204.
As may be seen from the above, the use of locating features, such as pins 202 and apertures 302, 304, and 306, may permit tighter dimensional control and may ensure that the second base portion 300 and first base portion 204 couple together in the same location each time regardless of the drive order of the fasteners. Further, in addition to the resulting ease of assembly, in response to the base and main body being positively located each time, further results may be improved craftsmanship and reduced assembly problems.
This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
