EP2801990A1 - Electric spindle, particularly for forming coils by winding a wire around a spool - Google Patents

Electric spindle, particularly for forming coils by winding a wire around a spool Download PDF

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Publication number
EP2801990A1
EP2801990A1 EP14167305.3A EP14167305A EP2801990A1 EP 2801990 A1 EP2801990 A1 EP 2801990A1 EP 14167305 A EP14167305 A EP 14167305A EP 2801990 A1 EP2801990 A1 EP 2801990A1
Authority
EP
European Patent Office
Prior art keywords
spindle
electric
spindle shaft
electric motor
supporting element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14167305.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Gian Battista Parati
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marsilli and Co SpA
Original Assignee
Marsilli and Co SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marsilli and Co SpA filed Critical Marsilli and Co SpA
Publication of EP2801990A1 publication Critical patent/EP2801990A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding

Definitions

  • the present invention relates to an electric spindle, particularly for forming coils by winding a wire around a spool.
  • the formation of coils by winding a wire about a spool is usually carried out using a spindle that is actuated by an electric motor and which makes the spool, on which the wire that is fed to the spool is to be wound, rotate about its own axis.
  • Conventional electric spindles usually comprise a supporting element that supports the spindle shaft so that it can rotate about its own axis.
  • Such shaft is actuated by an electric motor the body or enclosure of which is fixed to the supporting element in a cantilever fashion.
  • an encoder Fixed to the other end of the electric motor body with respect to the supporting element is an encoder, the function of which is to control the rotation of the spindle shaft so as to allow adjustment of the rotation speed of the spindle shaft by means of a feedback control system.
  • the aim of the present invention is to solve the above mentioned drawback by providing an electric spindle, particularly for forming coils by winding a wire around a spool, which is capable of reducing, to a considerable extent, the vibrations generated by the rotation of the spindle shaft so as to make it possible to achieve appreciably higher rotation speeds than those that can be achieved with conventional electric spindles.
  • an object of the invention is to provide an electric spindle that makes it possible to achieve higher productivity levels with respect to those that can be achieved with conventional electric spindles.
  • Another object of the invention is to provide an electric spindle that, even at high rotation speeds of the spindle shaft, ensures a high level of precision in the winding of the wire about the spool, thus ensuring a high level of quality in the finished product.
  • a further object of the invention is to provide an electric spindle that prevents or substantially reduces problems of overheating and the onset of unwanted currents during winding.
  • Another object of the invention is to provide an electric spindle that offers the highest guarantees of safety and reliability in use, and which can be produced at low cost.
  • an electric spindle particularly for forming coils by winding a wire around a spool, comprising:
  • the electric spindle generally designated by the reference numeral 1, comprises a supporting element 2 that supports, rotatably about its own axis 3a, a spindle shaft 3 that is connected to an electric motor 4 that can be actuated in order to cause the actuation, with a rotary motion about its own axis 3a relative to the supporting element 2, of the spindle shaft 3.
  • the electric spindle in question comprises, furthermore, an encoder 5 which is connected to the spindle shaft 3 in order to control the rotation thereof.
  • the encoder 5 is functionally connected to an electronic command and control element, conventional and not shown for the sake of simplicity, which oversees the operation of the electric spindle and which regulates the actuation of electric motor 4 as a function of the value read by the encoder 5 so as to maintain with precision the rotation speed of the spindle shaft 3 at a preset value.
  • the body of the electric motor 4 and the body of the encoder 5 are connected directly to the supporting element 2.
  • the term “directly” means that the electric motor body 4 and the body of the encoder 5 are both fixed to the supporting element 2 and that, in particular, the encoder 5 is not connected to the supporting element 2 by way of the electric motor body 4, as occurs in conventional electric spindles. This does not mean that there cannot be additional connection elements, such as for example blocks, inserts, spacers or the like, between the electric motor body 4 and the supporting element 2, and also between the body of the encoder 5 and the supporting element 2.
  • the supporting element 2 and the electric motor body 4 are made in one piece i.e. the supporting element 2 also constitutes the electric motor body 4.
  • the supporting element 2 is provided in the form of a housing, externally for example having an at least partly prismatic or parallelepiped shape, as illustrated, and, internally, having a cavity 7 that accommodates the stator 6 and the rotor 8 of the electric motor, the encoder 5 and the spindle shaft 3.
  • the body or housing of the electric motor 4 is preferably constituted by the supporting element 2 proper. In this manner, the electric motor 4 and the encoder 5 are directly coupled inside a single body.
  • the cavity 7 is conveniently substantially cylindrical and the spindle shaft 3 is arranged coaxially in such cavity 7.
  • the spindle shaft 3 is intended to be connected with an axial end thereof, which is constituted by the left-hand end in Figures 1 and 4 , to a conventional spool-holder, not shown for the sake of simplicity.
  • the spindle shaft 3 is supported, rotatably about its own axis 3a, within the cavity 7 by way of bearings 9, 10, 11 which are arranged proximate to the axial ends thereof.
  • At least one of the bearings 9, 10 that are arranged proximate to the axial end of the spindle shaft 3 that is intended to be engaged with the spool of the coils to be produced is constituted by a ceramic ball bearing.
  • the spindle shaft 3 is supported by way of a pair of ceramic ball bearings 9, 10.
  • the spindle shaft 3 is supported by another ball bearing 11.
  • the rotor 8 of the electric motor 4 is preferably arranged at an intermediate region of the axial extension of the spindle shaft 3 within the cavity 7.
  • the rotor 8 of the electric motor 4 is fixed to a portion of the lateral surface of the spindle shaft 3 and the stator 6 of the electric motor 4 is fixed to the walls of the cavity 7 which face the rotor 8.
  • the outer surface of the supporting element 2, at the stator 6 and the rotor 8 of the electric motor 4, is conveniently provided with fins 15 in order to facilitate the removal of heat.
  • the encoder 5 is arranged around the spindle shaft 3 proximate to its other axial end with respect to its axial end that is intended to be connected to the spool of the coil to be produced.
  • the encoder 5 is arranged outside the axial portion of the spindle shaft 3 which is arranged between the bearings 10, 11.
  • the bearing 11 is arranged between the rotor 8 and the encoder 5.
  • a device 12 is provided for the safety locking of the rotation of the spindle shaft 3.
  • Such device 12 for safety locking comprises, in a way that is known per se, a star wheel 13 that is integral with the spindle shaft 3 in rotation about its own axis 3a and a locking element 14 that faces the star wheel 13 laterally and which can be engaged on command with one of the recesses of the star wheel 13.
  • the particular manner with which the supporting element 2, the electric motor 4 and the encoder 5 are made and assembled considerably reduces vibrations and makes it possible to obtain fully satisfactory operation with high rotation speeds, even higher than 15,000 rpm.
  • the electric spindle according to the invention fully achieves the set aim in that it can achieve without problems rotation speeds of the spindle shaft which are appreciably higher than those that can be achieved with conventional electric spindles, thus enabling the winding machine, on which it is installed, to attain considerable increases in production.
  • Another advantage of the electric spindle according to the invention is that it can operate at high speeds without problems of overheating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP14167305.3A 2013-05-10 2014-05-07 Electric spindle, particularly for forming coils by winding a wire around a spool Withdrawn EP2801990A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000771A ITMI20130771A1 (it) 2013-05-10 2013-05-10 Elettromandrino, particolarmente per la formazione di bobine mediante l'avvolgimento di un filo attorno ad un rocchetto.

Publications (1)

Publication Number Publication Date
EP2801990A1 true EP2801990A1 (en) 2014-11-12

Family

ID=48670696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14167305.3A Withdrawn EP2801990A1 (en) 2013-05-10 2014-05-07 Electric spindle, particularly for forming coils by winding a wire around a spool

Country Status (2)

Country Link
EP (1) EP2801990A1 (it)
IT (1) ITMI20130771A1 (it)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201918836U (zh) * 2010-05-06 2011-08-03 宁波市镇海众鑫数控(自动化)机床厂 有检测装置可消除轴向位移的电主轴
CN202028775U (zh) * 2011-03-17 2011-11-09 常州克迈特数控科技有限公司 高速直连式加工中心的主轴
CN102389984A (zh) * 2010-11-18 2012-03-28 西安合升动力科技有限公司 一种车铣磨复合永磁同步电主轴
CN102394536A (zh) * 2010-11-18 2012-03-28 西安合升动力科技有限公司 一种永磁同步磨削电主轴
CN202343961U (zh) * 2011-11-15 2012-07-25 山东宏康机械制造有限公司 一种车床电主轴
CN202479516U (zh) * 2012-02-06 2012-10-10 徐松茂 数控机床多级变频电主轴水冷却车头的安装结构
EP2514556A1 (en) * 2011-04-21 2012-10-24 BIESSE S.p.A. Operating head for processing wood components or the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201918836U (zh) * 2010-05-06 2011-08-03 宁波市镇海众鑫数控(自动化)机床厂 有检测装置可消除轴向位移的电主轴
CN102389984A (zh) * 2010-11-18 2012-03-28 西安合升动力科技有限公司 一种车铣磨复合永磁同步电主轴
CN102394536A (zh) * 2010-11-18 2012-03-28 西安合升动力科技有限公司 一种永磁同步磨削电主轴
CN202028775U (zh) * 2011-03-17 2011-11-09 常州克迈特数控科技有限公司 高速直连式加工中心的主轴
EP2514556A1 (en) * 2011-04-21 2012-10-24 BIESSE S.p.A. Operating head for processing wood components or the like
CN202343961U (zh) * 2011-11-15 2012-07-25 山东宏康机械制造有限公司 一种车床电主轴
CN202479516U (zh) * 2012-02-06 2012-10-10 徐松茂 数控机床多级变频电主轴水冷却车头的安装结构

Also Published As

Publication number Publication date
ITMI20130771A1 (it) 2014-11-11

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