JP2020178723A - Direct drive motor for sewing machine - Google Patents

Direct drive motor for sewing machine Download PDF

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Publication number
JP2020178723A
JP2020178723A JP2019068401A JP2019068401A JP2020178723A JP 2020178723 A JP2020178723 A JP 2020178723A JP 2019068401 A JP2019068401 A JP 2019068401A JP 2019068401 A JP2019068401 A JP 2019068401A JP 2020178723 A JP2020178723 A JP 2020178723A
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JP
Japan
Prior art keywords
sewing machine
motor
machine frame
motor body
direct drive
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Pending
Application number
JP2019068401A
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Japanese (ja)
Inventor
鳴 劉
Ming Liu
鳴 劉
志芸 賈
Zhiyun Jia
志芸 賈
小川　茂樹
Shigeki Ogawa
茂樹 小川
正樹 朝比奈
Masaki Asahina
正樹 朝比奈
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.)
Feima Tianjin Sewing Machine Co Ltd
Pegasus Co Ltd
Original Assignee
Feima Tianjin Sewing Machine Co Ltd
Pegasus Sewing Machine Manufacturing Co Ltd
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 Feima Tianjin Sewing Machine Co Ltd, Pegasus Sewing Machine Manufacturing Co Ltd filed Critical Feima Tianjin Sewing Machine Co Ltd
Priority to JP2019068401A priority Critical patent/JP2020178723A/en
Priority to CN202010239841.3A priority patent/CN111756176A/en
Priority to TW109110442A priority patent/TW202104712A/en
Priority to CN202020428662.XU priority patent/CN211791129U/en
Publication of JP2020178723A publication Critical patent/JP2020178723A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/10—Electrical or electromagnetic drives
    • D05B69/12—Electrical or electromagnetic drives using rotary electric motors
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B71/00—Lubricating or cooling devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Abstract

To provide a direct drive motor for sewing machine which can efficiently cool a motor even with a structure in which the inside of a motor body is hermetically sealed.SOLUTION: An opening on a sewing machine frame 11 side of a motor body 20 is covered by a cover 24, and a suction port 32 is provided. A fan 15 is mounted on a main shaft of the sewing machine, and an exhaust port 33 is provided below the fan 15 in the sewing machine frame 11. Between the sewing machine frame 11 and the motor body 20, a partition wall plate 35 is arranged and the suction port 32 and the exhaust port 33 are separated, and by a ventilation port 35a of the partition wall plate 35, the sewing machine frame 11 and the motor body 20 are communicated with each other.SELECTED DRAWING: Figure 1

Description

本発明は、ミシンの駆動モータに関するものであり、詳しくはモータ本体がミシンフレームに取り付けられるミシンのダイレクト駆動モータに関する。
本発明において、上下左右はミシンを正面から見たときの上下左右を指す。 The present invention relates to a drive motor of a sewing machine, and more particularly to a direct drive motor of a sewing machine in which a motor body is attached to a sewing machine frame.
In the present invention, the top, bottom, left, and right refer to the top, bottom, left, and right when the sewing machine is viewed from the front.

この種のミシンのダイレクト駆動モータとして、モータ内部を密閉したものが従来より知られている（例えば、特許文献１参照）。
ミシンのダイレクト駆動モータを為すモータはモータ本体，モータ軸，固定子，回転子，ハンドホイール等を含み、モータ本体はミシンフレームへの取り付け側が開口しており、当該開口はカバーで覆われている。このカバーによってモータ本体の内部が密閉され、ミシン針や埃などの異物がモータ本体の内部に侵入してモータが破損したり焼損したりするのが防止される。 As a direct drive motor of this type of sewing machine, a motor in which the inside of the motor is sealed has been conventionally known (see, for example, Patent Document 1).
The motor that makes up the direct drive motor of the sewing machine includes the motor body, motor shaft, stator, rotor, hand wheel, etc. The motor body has an opening on the side to be attached to the sewing machine frame, and the opening is covered with a cover. .. This cover seals the inside of the motor body and prevents foreign matter such as sewing needles and dust from entering the inside of the motor body and damaging or burning the motor.

中国実用新案第２０６０１５２６２号公報（第１図）China Utility Model No. 206012562 (Fig. 1)

しかし、上述した従来技術のミシンのダイレクト駆動モータにおいては、モータ本体が密閉されたためにモータの温度が高くなるという問題があった。
特許文献１には、ミシンのファンやハンドホイールを利用してミシンの外部から空気を取り込み、この空気によってモータ本体を冷却するような構造になってるが、上述の構造ではモータ本体の冷却が不十分であり、モータやモータに連結されるミシンの温度上昇につながっていた。 However, in the direct drive motor of the sewing machine of the above-mentioned conventional technique, there is a problem that the temperature of the motor becomes high because the motor body is sealed.
Patent Document 1 has a structure in which air is taken in from the outside of the sewing machine by using a fan or a handwheel of the sewing machine and the motor body is cooled by this air, but the above structure does not cool the motor body. It was sufficient and led to an increase in the temperature of the motor and the sewing machine connected to the motor.

本発明は、上記問題を解決するためになされたものであり、その目的は、モータ本体の内部が密閉された構造であってもモータを効率よく冷却できるミシンのダイレクト駆動モータを提供することにある。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a direct drive motor of a sewing machine capable of efficiently cooling a motor even if the inside of the motor body is sealed. is there.

上記目的を達成するために、請求項１に記載の発明は、モータ本体，モータ軸，固定子，回転子を含み、モータ軸がミシンの主軸に連結され且つモータ本体がミシンフレームに取り付けられるミシンのダイレクト駆動モータであって、モータ本体はミシンフレームへの取り付け口が開口し、前記モータ本体のミシンフレームへの取り付け側開口はカバーによって覆われ、モータ本体には吸気口が設けられ、ミシンフレームには排気口が設けられ、ファンがミシンフレームの側面に配置され且つ主軸に取り付けられ、モータ本体とミシンフレームの間に隔壁板が設けられ、隔壁板には前記吸気口および前記排気口と通じるように形成される通気孔が形成されていることを特徴とする。 In order to achieve the above object, the invention according to claim 1 includes a motor body, a motor shaft, a stator, and a rotor, and the motor shaft is connected to the main shaft of the sewing machine and the motor body is attached to the sewing machine frame. The direct drive motor of the motor body has an opening for attaching to the sewing machine frame, the opening on the attachment side of the motor body to the sewing machine frame is covered with a cover, and the motor body is provided with an intake port. Is provided with an exhaust port, a fan is arranged on the side surface of the sewing machine frame and attached to the main shaft, a partition plate is provided between the motor body and the sewing frame, and the partition plate communicates with the intake port and the exhaust port. It is characterized in that the ventilation holes formed in the above manner are formed.

請求項２の発明は、請求項１のミシンのダイレクト駆動モータにおいて、前記ファンは遠心ファンであり、前記隔壁板の通気孔に前記モータ軸が挿通されていることを特徴とする。
The invention of claim 2 is characterized in that, in the direct drive motor of the sewing machine of claim 1, the fan is a centrifugal fan, and the motor shaft is inserted into a ventilation hole of the partition plate.

請求項３の発明は、請求項１または２のミシンのダイレクト駆動モータにおいて前記カバーのミシンフレームと対向する面には少なくとも１つの溝部が形成されていることを特徴とする。 The invention of claim 3 is characterized in that, in the direct drive motor of the sewing machine according to claim 1 or 2, at least one groove is formed on the surface of the cover facing the sewing machine frame.

請求項１の発明によれば、モータ本体の排気口とミシンフレームの吸気口が隔壁板によって分離される。そして隔壁板よりもモータ本体側には排気口から流入した冷たい空気が流通するので、モータ本体を効率よく冷却することができる。 According to the invention of claim 1, the exhaust port of the motor body and the intake port of the sewing machine frame are separated by a partition plate. Since the cold air flowing from the exhaust port flows to the motor body side of the partition plate, the motor body can be cooled efficiently.

請求項２の発明によれば、ファンの外側に空気が排出されるので排気口からの排気の効率が上がる。また、ファンの中心側すなわちファンが取り付けられる主軸の周辺が相対的に負圧となり、主軸と連結されるモータ軸の周辺もまた負圧となる。隔壁板の通気孔はモータ軸を挿通して配置されるので通気孔を通じてのエアフローが効率よく行われ、結果として吸気口からの空気の取り込みの効率が上がる。
請求項３の発明によれば、カバーの表面積が大きくなり、また吸気口から取り込まれた空気の流れが乱れることによって、カバーの冷却効率が上がりモータ本体を効率よく冷却することができる。 According to the invention of claim 2, since air is discharged to the outside of the fan, the efficiency of exhaust from the exhaust port is improved. Further, the central side of the fan, that is, the periphery of the spindle to which the fan is mounted has a relatively negative pressure, and the periphery of the motor shaft connected to the spindle also has a negative pressure. Since the ventilation holes of the partition plate are arranged by inserting the motor shaft, air flow through the ventilation holes is efficiently performed, and as a result, the efficiency of taking in air from the intake port is improved.
According to the third aspect of the present invention, the surface area of the cover is increased and the flow of air taken in from the intake port is disturbed, so that the cooling efficiency of the cover is increased and the motor body can be efficiently cooled.

本発明のミシンのダイレクト駆動モータを正面から見たときの断面図である。It is sectional drawing when the direct drive motor of the sewing machine of this invention is seen from the front. 同上モータの要部を占める分解斜視図である。It is an exploded perspective view which occupies the main part of the motor as above. 図１のＡ−Ａ断面図である。FIG. 1 is a sectional view taken along the line AA of FIG.

以下、図１乃至３に基づいて、本発明の実施形態を説明する。
図１に示すように、ミシンのダイレクト駆動モータを為すモータ１３は、モータ本体２０，モータ軸２８，固定子２１，回転子２２，ハンドホイール１４を含み、モータ本体２０はミシンフレーム１１に取り付けられている。モータ本体２０はミシンフレーム１１への取り付け側が開口しており、当該開口にはカバー２４が設けられている。カバー２４は取付部２５，主部２４ａ，挿通孔２６で構成されている。カバー２４の主部２４ａはモータ本体２０の前記開口を覆うようにモータ本体２０内に配置され、取付部２５は主部２４ａの周端からモータ本体２０の内周面に沿って、水平方向（且つ後述するモータ軸２８の一端方向）に延出形成されている。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the motor 13 forming the direct drive motor of the sewing machine includes a motor body 20, a motor shaft 28, a stator 21, a rotor 22, and a handwheel 14, and the motor body 20 is attached to the sewing machine frame 11. ing. The motor body 20 has an opening on the side to be attached to the sewing machine frame 11, and a cover 24 is provided in the opening. The cover 24 is composed of a mounting portion 25, a main portion 24a, and an insertion hole 26. The main portion 24a of the cover 24 is arranged in the motor main body 20 so as to cover the opening of the motor main body 20, and the mounting portion 25 is arranged in the horizontal direction from the peripheral end of the main portion 24a along the inner peripheral surface of the motor main body 20. In addition, it is formed so as to extend in the direction of one end of the motor shaft 28, which will be described later.

図１，図２に示すように、カバー２４の挿通孔２６は主部２４ａからミシンフレーム１１側に延出形成されており、挿通孔２６の内周にベアリング２７が嵌挿固定されている。挿通孔２６とベアリング２７の間にはＯリング１６が介在している。モータ軸２８は一端がモータ本体２０から突出しており、該一端はハンドホイール１４の固定部１４ａに嵌挿されネジ１８によって固定されている。モータ軸２８の他端に中空状の継手部２８ｂが形成されており、継手部２８ｂの部分において１個のベアリング２７によって片持ち支持されている。継手部２８ｂには２個のネジ孔２８ａ，２８ａが形成されている。ネジ孔２８ａ，２８ａはカバー２４より内側（モータ本体２０内）且つモータ軸２８の一周回上に形成されている。モータ軸２８の継手部２８ｂにはミシンの主軸１２が嵌挿され且つネジ孔２８ａ，２８ａを通じてネジ１９，１９で固定されている。また主軸１２とモータ軸２８とはネジ１７によってもねじ止めされている。
As shown in FIGS. 1 and 2, the insertion hole 26 of the cover 24 extends from the main portion 24a to the sewing machine frame 11 side, and the bearing 27 is fitted and fixed to the inner circumference of the insertion hole 26. An O-ring 16 is interposed between the insertion hole 26 and the bearing 27. One end of the motor shaft 28 protrudes from the motor body 20, and one end of the motor shaft 28 is fitted and inserted into the fixing portion 14a of the handwheel 14 and fixed by a screw 18. A hollow joint portion 28b is formed at the other end of the motor shaft 28, and the joint portion 28b is cantilevered and supported by one bearing 27. Two screw holes 28a and 28a are formed in the joint portion 28b. The screw holes 28a and 28a are formed inside the cover 24 (inside the motor body 20) and on one circumference of the motor shaft 28. The spindle 12 of the sewing machine is fitted into the joint portion 28b of the motor shaft 28 and fixed with screws 19 and 19 through the screw holes 28a and 28a. The spindle 12 and the motor shaft 28 are also screwed together by screws 17.

図１、図３に示すように、モータ本体２０内においてモータ軸２８の外周に回転子２２が固定されている。固定子２１は回転子２２の外周に対向して配置され、且つモータ本体２０の内周面にホルダー２３を介して固定されている。カバー２４の取付部２５には水平方向に延びる溝２５ｂ，２５ｂ、２５ｂと溝２５ｃ、２５ｃ、２５ｃが周回方向に交互に設けられている。溝２５ｂはミシンフレーム１１側の一端のみ貫通しており、溝２５ｃは両端が貫通している。カバー２４は溝２５ｂ，２５ｂ，２５ｂを通じてネジ２９でモータ本体２０に固定され、ホルダー２３は溝２５ｃ，２５ｃ，２５ｃを通じてネジ２９でモータ本体２０に固定されている。 As shown in FIGS. 1 and 3, the rotor 22 is fixed to the outer periphery of the motor shaft 28 in the motor main body 20. The stator 21 is arranged so as to face the outer periphery of the rotor 22 and is fixed to the inner peripheral surface of the motor body 20 via the holder 23. The mounting portion 25 of the cover 24 is provided with grooves 25b, 25b, 25b extending in the horizontal direction and grooves 25c, 25c, 25c alternately provided in the circumferential direction. The groove 25b penetrates only one end on the sewing machine frame 11 side, and the groove 25c penetrates both ends. The cover 24 is fixed to the motor body 20 with screws 29 through the grooves 25b, 25b, 25b, and the holder 23 is fixed to the motor body 20 with screws 29 through the grooves 25c, 25c, 25c.

モータ本体２０には通孔２０ａが、カバー２４の取付部２５には通孔２５ａが、それぞれ形成されている。図３に示すように、通孔２０ａ，通孔２５ａはモータ軸２８のネジ孔２８ａを臨む位置に連通して配置されている。そして通孔２０ａ，２５ａを通じてネジ孔２８ａのネジ１９を操作することによって、モータ軸２８と主軸１２との固定，解除を行うことが出来る。通孔２０ａには栓３０が嵌挿され、モータ本体２０内に埃など異物が侵入しないようにされている。 A through hole 20a is formed in the motor main body 20, and a through hole 25a is formed in the mounting portion 25 of the cover 24. As shown in FIG. 3, the through holes 20a and the through holes 25a are arranged so as to communicate with each other at positions facing the screw holes 28a of the motor shaft 28. Then, by operating the screw 19 of the screw hole 28a through the through holes 20a and 25a, the motor shaft 28 and the spindle 12 can be fixed and released. A plug 30 is inserted into the through hole 20a to prevent foreign matter such as dust from entering the motor body 20.

ファン１５はミシンフレーム１１側面とカバー２４の間に配置され、主軸１２に取り付けられている。ファン１５は遠心ファンであって羽根部１５ａを有し、羽根部１５ａはモータ１３側に向かって且つ先端側が中心側よりも大きく延出している。
ミシンフレーム１１には、ファン１５の下方に排気口３３が設けられている。モータ１３の駆動によってミシンの主軸１２およびファン１５が駆動すると、ファン１５の外側に空気が吐き出され、この吐き出された空気が排気口３３を通じてミシンフレーム１１の外に排出される。
The fan 15 is arranged between the side surface of the sewing machine frame 11 and the cover 24, and is attached to the spindle 12. The fan 15 is a centrifugal fan and has a blade portion 15a, and the blade portion 15a extends toward the motor 13 side and the tip side is larger than the center side.
The sewing machine frame 11 is provided with an exhaust port 33 below the fan 15. When the main shaft 12 and the fan 15 of the sewing machine are driven by the drive of the motor 13, air is discharged to the outside of the fan 15, and the discharged air is discharged to the outside of the sewing machine frame 11 through the exhaust port 33.

図１，図２に示すように、モータ本体２０とミシンフレーム１１との間に隔壁板３５が配置されている。隔壁板３５は板状の部材で、ネジ３４，３４，３４によってモータ本体２０の取り付け口３６に取り付けられている。隔壁板３５には円形の通気孔３５ａが形成されており、通気孔３５ａにはカバー２４の挿通孔２６，ベアリング２７、モータ軸２８を介して主軸１２が挿通されている。通気孔３５ａの内径は挿通孔２６の前記延出部分の外径よりも径大となっている。
As shown in FIGS. 1 and 2, a partition plate 35 is arranged between the motor main body 20 and the sewing machine frame 11. The partition plate 35 is a plate-shaped member, and is attached to the attachment port 36 of the motor body 20 by screws 34, 34, 34. A circular ventilation hole 35a is formed in the partition plate 35, and the main shaft 12 is inserted into the ventilation hole 35a via the insertion hole 26 of the cover 24, the bearing 27, and the motor shaft 28. The inner diameter of the ventilation hole 35a is larger than the outer diameter of the extending portion of the insertion hole 26.

モータ本体２０のミシンフレーム１１側の端部には、吸気口３２が形成されている。吸気口３２は隔壁板３５と組み合わされてモータ本体２０の内外を貫通する穴形状となっており、且つカバー２４の外面に通じるようにされている。
An intake port 32 is formed at the end of the motor body 20 on the sewing machine frame 11 side. The intake port 32 is combined with the partition plate 35 to have a hole shape penetrating the inside and outside of the motor body 20, and is made to communicate with the outer surface of the cover 24.

以上のような構成により、モータ本体２０の吸気口３２とミシンフレーム１１の排気口３３とは隔壁板３５によって分離され、モータ本体２０とミシンフレーム１１とは隔壁板３５の通気孔３５ａによって連通するようになっている。これによって、隔壁板よりも右（モータ１３側）には吸気口３２から流入した冷たい空気のみが流通することになり、モータ本体２０を効率よく冷却することができる。
With the above configuration, the intake port 32 of the motor body 20 and the exhaust port 33 of the sewing machine frame 11 are separated by the partition plate 35, and the motor body 20 and the sewing machine frame 11 are communicated with each other by the ventilation holes 35a of the partition plate 35. It has become like. As a result, only the cold air that has flowed in from the intake port 32 flows to the right (motor 13 side) of the partition plate, and the motor body 20 can be efficiently cooled.

また、ファン１５は遠心ファンであるため、ファンの中心側すなわちファン１５が取り付けられる主軸１２の周辺に負圧が生じる。そうすると同じく主軸回りに配置された通気孔３５ａから空気を取り込みやすくなり、結果として吸気口３２から空気を効率よく取り込める。 Further, since the fan 15 is a centrifugal fan, a negative pressure is generated on the center side of the fan, that is, around the spindle 12 to which the fan 15 is attached. Then, it becomes easy to take in air from the ventilation holes 35a also arranged around the main shaft, and as a result, air can be taken in efficiently from the intake port 32.

本実施例では、カバー２４の主部２４ａの外面（ミシンフレーム１１に対向する面）に複数の溝部２４ｂが形成されている。これによってカバー２４外面の表面積を増やし、また吸気口３２から取り込んだ空気の流れを乱すことによって、カバー２４の冷却効率を上げている。 In this embodiment, a plurality of groove portions 24b are formed on the outer surface (the surface facing the sewing machine frame 11) of the main portion 24a of the cover 24. As a result, the surface area of the outer surface of the cover 24 is increased, and the flow of air taken in from the intake port 32 is disturbed to improve the cooling efficiency of the cover 24.

１１ ミシンフレーム
１２ 主軸
１３ モータ
１５ ファン
２０ モータ本体
２４ カバー
２４ｂ 溝部
２８ モータ軸
３２ 吸気口
３３ 排気口
３５ 隔壁板
３５ａ 通気孔
３６ 取り付け口 11 Sewing machine frame 12 Main shaft 13 Motor 15 Fan 20 Motor body 24 Cover 24b Groove 28 Motor shaft 32 Intake port 33 Exhaust port 35 Partition plate 35a Vent 36 Mounting port

Claims (3)

モータ本体，モータ軸，固定子，回転子を含み、モータ軸がミシンの主軸に連結され且つモータ本体がミシンフレームに取り付けられるミシンのダイレクト駆動モータであって、モータ本体はミシンフレームへの取り付け口が開口し、前記モータ本体のミシンフレームへの取り付け側開口はカバーによって覆われ、モータ本体には吸気口が設けられ、ミシンフレームには排気口が設けられ、ファンがミシンフレームの側面に配置され且つ主軸に取り付けられ、モータ本体とミシンフレームの間に隔壁板が設けられ、隔壁板には前記吸気口および前記排気口と通じるように形成される通気孔が形成されていることを特徴とする、ミシンのダイレクト駆動モータ。 A direct drive motor for a sewing machine that includes a motor body, a motor shaft, a stator, and a rotor, the motor shaft is connected to the main shaft of the sewing machine, and the motor body is attached to the sewing machine frame. The motor body is an attachment port to the sewing machine frame. Is opened, the opening on the attachment side of the motor body to the sewing machine frame is covered with a cover, the motor body is provided with an intake port, the sewing machine frame is provided with an exhaust port, and the fan is arranged on the side surface of the sewing machine frame. Further, it is attached to the main shaft, a partition plate is provided between the motor main body and the sewing machine frame, and the partition plate is characterized by having vent holes formed so as to communicate with the intake port and the exhaust port. , Direct drive motor of sewing machine. 前記ファンは遠心ファンであり、前記隔壁板の通気孔に前記モータ軸が挿通されていることを特徴とする、請求項１に記載のミシンのダイレクト駆動モータ。 The direct drive motor of the sewing machine according to claim 1, wherein the fan is a centrifugal fan, and the motor shaft is inserted through a ventilation hole of the partition plate. 前記カバーのミシンフレームと対向する面には少なくとも１つの溝部が形成されていることを特徴とする、請求項１または２に記載のミシンのダイレクト駆動モータ。
The direct drive motor for a sewing machine according to claim 1 or 2, wherein at least one groove is formed on a surface of the cover facing the sewing machine frame.
JP2019068401A 2019-03-29 2019-03-29 Direct drive motor for sewing machine Pending JP2020178723A (en)

Priority Applications (4)

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JP2019068401A JP2020178723A (en) 2019-03-29 2019-03-29 Direct drive motor for sewing machine
CN202010239841.3A CN111756176A (en) 2019-03-29 2020-03-27 Direct drive motor of sewing machine
TW109110442A TW202104712A (en) 2019-03-29 2020-03-27 Direct drive motor of sewing machine
CN202020428662.XU CN211791129U (en) 2019-03-29 2020-03-27 Direct drive motor of sewing machine

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201910703U (en) * 2010-08-16 2011-07-27 贺欣机械厂股份有限公司 Improvement for radiating structure of motor
JP3216132U (en) * 2018-02-23 2018-05-17 賀欣機械▲廠▼股▲分▼有限公司 Sewing machine heat dissipation drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201910703U (en) * 2010-08-16 2011-07-27 贺欣机械厂股份有限公司 Improvement for radiating structure of motor
JP3216132U (en) * 2018-02-23 2018-05-17 賀欣機械▲廠▼股▲分▼有限公司 Sewing machine heat dissipation drive

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CN211791129U (en) 2020-10-27
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