DESC:F O R M 2

THE PATENTS ACT, 1970
(39 of 1970)
COMPLETE SPECIFICATION
(See section 10; rule 13)

1. TITLE OF THE INVENTION

MOTOR FITMENT ASSEMBLY FOR FAN
2. APPLICANT
a. Name: ORIENT ELECTRIC LIMITED
b. Nationality: Indian
c. Address: Unit VIII, Plot No.: 7, Bhoinagar, Bhubaneswar, 751012, Orissa, India

Complete specification:
The following specification particularly describes the invention and the manner in which it is to be performed.

MOTOR FITMENT ASSEMBLY FOR FAN
FIELD OF INVENTION:
[001] The present subject matter described herein, relates to a motor fitment assembly for a ceiling fan with low diameter without compromising fan operation and safety in ceiling fans.
BACKGROUND AND PRIOR ART:
[001] Typically, all the fans have a top and bottom cover which holds the motor intact in between the top and bottom cover and there are two bearings one in the top cover and other in the bottom cover for smooth operation of the fans.
[002] In few design it has been observed that both the bearings were used in the top cover and there was no metal bottom cover available which becomes and accidental problem in case of fire or high temperature rise inside the motor.
[003] Also there could be cases where the magnet can fail its magnetism or for some reason fall out of assembly and then can be another accidental problem as well as performance related issues in motor which will degrade the motor efficiency.
[004] In accordance with these associated problems it was not possible to lower the diameter of motor cover and do not risk safety.
OBJECTS OF THE INVENTION:
[005] The principal objective of the present invention to improve the motor efficiency in the fan.
[006] Another object of the present invention is to prevent the failures and movement of magnets in the fan.
[007] Yet another object of the present invention is to provide the additional safety in the fan.
SUMMARY OF THE INVENTION:
[008] The present subject matter relates to a motor assembly for a ceiling fan. The motor housing assembly comprising a spindle having a middle support at one end and a light device at other end where middle support is press fitted and the light device is mounted by means of screw or bolt. A stator press fitted with the spindle in between the middle support and the light device; a top over and a bottom cover is provided in between the middle support and the light device. The top cover comprising an upper cylindrical housing and a lower cylindrical housing; a ring of magnets positioned in the lower cylindrical housing; a metal ring press fitted in between the ring of magnets and inner surface of the lower cylindrical housing. A diffuser mounted on the bottom cover by means of screws.
[009] In an aspect, a first bearing is provided in between interference of the top cover and the spindle.
[0010] In an aspect, a second bearing is provided in between interference of the bottom cover and the spindle.
[0011] In an aspect, a plurality of countersunk screws is provided equi-distant from each other on outer circumference of the top cover to join the top cover and the bottom cover, the bottom cover consists a joining portion that inserted inside the top cover and joined by the plurality of countersunk screws, the joining portion also supports the press fitted metal ring and the ring of magnets in vertical downward direction.
[0012] In an aspect, the light device is fixedly mounted on the spindle.
[0013] In an aspect, a spring is provided in between the stator and the second bearing.
[0014] In an aspect, a bush is provided at end of the spindle after the middle support.
[0015] In an aspect, diameter (d) of the upper cylindrical housing is less than diameter (D) the lower cylindrical housing to accommodate mounting portion of a blade.
[0016] In an aspect, top portion that is closed portion of the upper cylindrical housing has a plurality of mounting holes to facilitate mounting of the mounting portion of the blade and a false cover.
[0017] In an aspect, the top over having the ring of magnets and the metal ring and the bottom cover act as rotor to rotate plurality of blades mounted on the top cover.
[0018] In order to further understand the characteristics and technical contents of the present subject matter, a description relating thereto will be made with reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit scope of the present subject matter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0020] Fig. 1 illustrates a cross section view of a motor assembly of ceiling fan, in accordance with an embodiment of the present subject matter;
[0021] Fig. 2 and 3 illustrate perspective and side view of the motor assembly, in accordance with the present subject matter;
[0022] Fig. 4 illustrates assembled view of the motor assembly, blade and false cover, in accordance with the present subject matter; and
[0023] Fig. 5 illustrates un-assembled view of the motor assembly, blade and false cover, in accordance with the present subject matter.
[0024] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DESCRIPTION OF THE PREFERRED EMBODIMENTS:
[0025] To overcome the challenges, the present subject matter relates to a fitting arrangement of motor assembly in which magnet ring is directly press fitted with a top cover of the motor and magnets are fitted on it which is further arrested with the bottom cover. The top cover is fixed with the bottom cover which normally happen in a way where bolt is in vertical direction/parallel to rotary axis of the fan. In current design, the top and bottom cover of motor is fitted sideways with countersunk screw to maximize the holding as well as no outside extension of screws to further help in reducing the overall fan motor outer cover diameter.
[0026] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0027] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
[0028] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
[0029] It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
[0030] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
[0031] The present subject matter relates to a fitting arrangement of motor assembly in which a magnet ring is directly press fitted with a top cover of the motor and a metal ring is provided in between the top cover and magnet ring to maintain the magnetic field. The magnets are fitted on it which is further supported with the bottom cover to avoid fall due to gravity and rotational motion. The top cover is fixed with the bottom cover which normally happen in a way where bolt is in vertical direction/parallel to rotary axis of the fan. In the present subject matter, the top and bottom cover of motor is fitted sideways with a plurality of countersunk screws to maximize the holding as well as no outside extension of screws to further help in reducing the overall fan motor outer cover diameter.
[0032] Referring to fig. 1 illustrating the motor assembly 100 of a ceiling fan. The motor assembly 100 comprises a spindle 101 having a middle support 103 at one end and a light device 113 at other end. The middle support 103 may be press fitted with the spindle 101 and provide to accommodate mounting of cover to hide hanging rod and wires like canopy of the ceiling fan. The light device 113 is fixedly mounted with the spindle 101 and does not rotate. The spindle 101 further comprises a stator 105 that is press fitted with the spindle 101 in between the middle support 103 and the light device 113. The motor assembly 100 further comprises a top over 104 and a bottom cover 111 where both are in cylindrical shape and top cover 104 having one end closed and other end open. The top cover 104 and the bottom cover 111 are provided in between the middle support 103 and the light device 113 on the spindle 101.
[0033] The top cover 104 comprising an upper cylindrical housing 104a and a lower cylindrical housing 104b. A ring of magnets 106 is positioned in the lower cylindrical housing 104b having more diameter as compared to upper cylindrical housing 104a. A metal ring 107 is press fitted in between the ring of magnets 106 and inner surface of the lower cylindrical housing 104b. The ring of magnets 106 is positioned in front of the stator 105 fixedly mounted on the spindle 101 to generate magnetic field. The complete top cover 104 and the bottom cover act as a rotor due to fixed mounted of the ring of magnets 106 on the top cover 104. The stator 105 generates electromagnetic field to rotate the rotor.
[0034] In an embodiment, a first bearing 105 is provided in between interference of the top cover 104 and the spindle 101. And a second bearing 109 is provided in between interference of the bottom cover 111 and the spindle 101.
[0035] In an embodiment, a diffuser 112 is fixedly mounted on the bottom cover 111 by means of screws.
[0036] Referring to fig. 1, 2, and 3, a plurality of countersunk screws 108 is provided equi-distantly from each other on outer circumference of the top cover 104 to join the top cover 104 and the bottom cover 111. The bottom cover 111 consist a joining portion having outer diameter less than inner diameter of the lower cylindrical housing 104b to accommodate the bottom cover 111. The joining portion inserted inside the top cover 104 and joined by the plurality of countersunk screws 108 that are mounted from outside of the top cover 104 on circumference of the top cover. The joining portion also supports the press fitted metal ring 107 and the ring of magnets 106 in vertical downward direction.
[002] As shown in the fig. 1, the light device 113 is fixedly mounted on the spindle 101 by means of screws. The light device 113 remains stationary while the diffuser 113 and the bottom cover 111 rotates as per speed of the fan. A spring 110 is provided in between the stator 105 and the second bearing 109 to facilitate positioning of the stator 105 in between the ring of magnets 106 for sufficient generation of magnetic field. The spring 110 maintain the rotor and stator alignment and avoid magnetic jerks generated during operation of the motor.
[0037] As shown in fig. 1, 2, and 3, a bush 102 is provide at top end of the spindle 101 after the middle support 103 to facilitate mounting of the down rod to avoid noise and friction in between the spindle 101 and the down rod.
[0038] Referring to fig. 1, 2, 4, and 5, the upper cylindrical housing 104a has diameter (d) which is less than diameter (D) the lower cylindrical housing 104b to accommodate mounting portion 201 of a blade 200. The mounting portion 201 and width of joint between the mounting portion and the blade is equal to difference between the diameter D and diameter d of the lower cylindrical housing 104b and the upper cylindrical housing 104a respectively.
[0039] Referring to fig. 1, 2, and 5, top portion that is closed portion of the upper cylindrical housing 104a has a plurality of mounting holes to facilitate mounting of the mounting portion 201 of the blade 200 and a false cover 300 by means of a plurality of screws.
[0040] A false cover 300 is provided over the assembly of the top cover 104 and the bottom cover 111 and seamlessly coupled with the blade 200 to provide a uniform connection. The complete assembly, i.e., the false cover 300, the blade 200, the top cover 104, the bottom cover 111, and the diffuser 113 acts a rotor and rotates with generation of electromagnetic field by the stator 105. The top over 104 having the ring of magnets 106 and the metal ring 107 and the bottom cover 111 act as rotor to rotate plurality of blades mounted on the top cover 104.
[0041] In an embodiment, to avoid magnet movements, the magnets are placed in such a way put a plastic part, i.e., magnet holder, each between two magnets which arrest them due to interference between the magnets and the plastic part to add the additional safety.
[0042] In an embodiment, the top cover is designed by considering the blade fitment which allow to show the aesthetics seamless, the top cover of the motor is designed to accommodate the higher specification bearing adaptation to make reliability increase from the normal motor, the top cover wall thickness is comparatively higher and rigid structure in cylindrical shape in comparison of normal motor.
[0043] The above description does not provide specific details of the manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art can choose suitable manufacturing and design details.
[0044] It should be understood, however, that all of these and similar terms are to be associated with the appropriate physical quantities and are merely convenient labels applied to these quantities. Unless specifically stated otherwise, as apparent from the discussion herein, it is appreciated that throughout the description, discussions utilizing terms such as “receiving,” or “setting,” or “transmitting,” or the like, refer to the action and processes of an electronic control unit, or similar electronic device, that manipulates and transforms data represented as physical (electronic) quantities within the control unit’s registers and memories into other data similarly represented as physical quantities within the control unit memories or registers or other such information storage, transmission or display devices.
[0045] Further, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.
[0046] It will be appreciated that variants of the above-disclosed and other features and functions, or alternatives thereof, may be combined into many other different systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.
[0047] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants and others.

,CLAIMS:We claim:
1. A motor assembly (100) for a ceiling fan comprising:
a spindle (101) having a middle support (103) at one end and a light device (113) at other end;
a stator (105) press fitted with the spindle (101) in between the middle support (103) and the light device (113);
a top over (104) and a bottom cover (111) is provided in between the middle support (103) and the light device (113), the top cover (104) comprising:
an upper cylindrical housing (104a) and a lower cylindrical housing (104b);
a ring of magnets (106) positioned in the lower cylindrical housing (104b); and
a metal ring (107) press fitted in between the ring of magnets (106) and inner surface of the lower cylindrical housing (104b).

2. The motor assembly (100) as claimed in claim 1, wherein a first bearing (105) is provided in between interference of the top cover (104) and the spindle (101).
3. The motor assembly (100) as claimed in claim 1, wherein a second bearing (109) is provided in between interference of the bottom cover (111) and the spindle (101).
4. The motor assembly (100) as claimed in claim 1, wherein a plurality of countersunk screws (108) is provided equi-distant from each other on outer circumference of the top cover (104) to join the top cover (104) and the bottom cover (111), the bottom cover (111) consist a joining portion that inserted inside the top cover (104) and joined by the plurality of countersunk screws (108), the joining portion also supports the press fitted metal ring (107) and the ring of magnets (106) in vertical downward direction.
5. The motor assembly (100) as claimed in claim 1, wherein a diffuser (112) mounted on the bottom cover (111).
6. The motor assembly (100) as claimed in claim 1, wherein a spring (110) is provided in between the stator (105) and the second bearing (109).
7. The motor assembly (100) as claimed in claim 1, wherein a bush (102) is provide at end of the spindle (101) after the middle support (103).
8. The motor housing assembly (100) as claimed in claim 1, wherein diameter (d) of the upper cylindrical housing (104a) is less than diameter (D) the lower cylindrical housing (104b) to accommodate mounting portion (201) of a blade (200).
9. The motor assembly (100) as claimed in claim 8, wherein top portion that is closed portion of the upper cylindrical housing (104a) has a plurality of mounting holes to facilitate mounting of the mounting portion (201) of the blade (200) and a false cover (300).
10. The motor assembly (100) as claimed in claim 1, wherein the top over (104) having the ring of magnets (106) and the metal ring (107) and the bottom cover (111) act as rotor to rotate plurality of blades mounted on the top cover (104).
Dated 3rd February 2020

AMIT JAIN
IN/PA-2189
L S DAVAR & CO.
APPLICANT’S AGENT