JP2008079368A - Motor - Google Patents

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Publication number
JP2008079368A
JP2008079368A JP2006252630A JP2006252630A JP2008079368A JP 2008079368 A JP2008079368 A JP 2008079368A JP 2006252630 A JP2006252630 A JP 2006252630A JP 2006252630 A JP2006252630 A JP 2006252630A JP 2008079368 A JP2008079368 A JP 2008079368A
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Japan
Prior art keywords
motor
sheet
output shaft
end surface
sheet metal
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Pending
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JP2006252630A
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Japanese (ja)
Inventor
Yuei Tsujikawa
祐栄 辻川
Tatsuya Kitada
達哉 北田
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Fujitsu General Ltd
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Fujitsu General Ltd
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Priority to JP2006252630A priority Critical patent/JP2008079368A/en
Publication of JP2008079368A publication Critical patent/JP2008079368A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor which can remarkably reduce noises by attaching a sound absorbing sheet on the end surface on the output shaft side of a motor case instead of the surrounding thereof. <P>SOLUTION: The other surface of a sheet metal 20 having the sound absorbing sheet 40 bonded to one surface is fixed with screws 30 to the end surface 12 on the output shaft 13 side of the motor case 11 of the motor 10. Further, a burring is welded to the end surface 12, allowing the sheet metal 20 to be fixed with the screws. Further, the sheet metal 20 and the sound absorbing sheet 40 are made into a doughnut shape and are brought closer to the output shaft to an extent that their inner edge parts do not contact with the output shaft. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、騒音対策を施したモータに関するものである。   The present invention relates to a motor with noise countermeasures taken.

例えば、天井埋込形空気調和機は、モータを、その出力軸を下方に向けて筐体に取り付け、その出力軸に吸気ファンを取り付けている。このような天井埋込形空気調和機では、低騒音化が強く望まれており、吸気ファンには各種対策が施されているが、モータ自体については不十分であった。特に、天井埋込形空気調和機では、吸気ファンの重量が比較的大きいので、モータへの負担が大きくなり、騒音が発生しやすかった。   For example, in a ceiling-embedded air conditioner, a motor is attached to a casing with its output shaft facing downward, and an intake fan is attached to its output shaft. In such a ceiling-embedded air conditioner, low noise is strongly desired, and various measures are taken for the intake fan, but the motor itself is insufficient. In particular, in a ceiling-embedded air conditioner, since the weight of the intake fan is relatively large, the burden on the motor is increased and noise is likely to occur.

一般的なモータの低騒音化対策として、モータケースの周面にスポンジ状シートを接触させ、そのスポンジ状シートの外側にゴムシートを配設した構造が提案されている(例えば、特許文献1参照)。   As a general motor noise reduction measure, a structure has been proposed in which a sponge sheet is brought into contact with the peripheral surface of a motor case and a rubber sheet is disposed outside the sponge sheet (see, for example, Patent Document 1). ).

この低騒音化対策を天井埋込形空気調和機のモータに適用するときは、モータケースの周囲にリング状ゴムシートでスポンジ状シートを締め付ける構造となる。
特開平6−078492号公報
When this noise reduction measure is applied to a motor of a ceiling-embedded air conditioner, a sponge-like sheet is tightened with a ring-shaped rubber sheet around the motor case.
JP-A-6-078492

しかしながら、このようにモータケースの周囲にリング状ゴムシートでスポンジ状シートを締め付ける構造では、スポンジ状シートのズレや脱落を防止するために、リング状ゴムシートで相当に強く締め付ける必用があり、スポンジ状シートやリング状ゴムシートの弾性が損なわれて、低騒音化対策が不十分となる。   However, in the structure in which the sponge-like sheet is fastened with the ring-shaped rubber sheet around the motor case as described above, it is necessary to tighten the ring-shaped rubber sheet considerably strongly in order to prevent the sponge-like sheet from being displaced or dropped. The elasticity of the sheet-like sheet and the ring-shaped rubber sheet is impaired, and the noise reduction measures are insufficient.

本発明の目的は、モータケースの周囲ではなく端面に吸音シートを取り付けて、十分な低騒音化を発揮できるようにしたモータを提供することである。   An object of the present invention is to provide a motor in which a sound-absorbing sheet is attached not to the periphery of a motor case but to an end face so that sufficient noise reduction can be achieved.

上記目的を達成するために、請求項1にかかる発明のモータは、モータケースの出力軸側の端面に、片面に吸音シートを貼付した板金の他面を固着したことを特徴とする。
請求項2にかかる発明は、請求項1に記載のモータにおいて、前記固着をネジ止めにより行ったことを特徴とする。
請求項3にかかる発明は、請求項2に記載のモータにおいて、前記端面にバーリングを溶接し、該バーリングに対して前記板金をネジ止めしたことを特徴とする。
請求項4にかかる発明は、請求項1、2又は3に記載のモータにおいて、前記板金および前記吸音シートを、ドーナツ形状とし、それらの内縁部が前記タ出力軸に接触しない程度に前記出力軸に近接させたことを特徴とする。
In order to achieve the above object, a motor according to a first aspect of the present invention is characterized in that the other surface of a sheet metal having a sound-absorbing sheet affixed on one side is fixed to the end surface of the motor case on the output shaft side.
According to a second aspect of the present invention, in the motor according to the first aspect, the fixing is performed by screwing.
According to a third aspect of the present invention, in the motor according to the second aspect, a burring is welded to the end face, and the sheet metal is screwed to the burring.
According to a fourth aspect of the present invention, in the motor according to the first, second, or third aspect, the sheet metal and the sound-absorbing sheet are formed in a donut shape, and the output shaft is made so that an inner edge portion thereof does not contact the data output shaft. It is characterized by being close to.

本発明によれば、モータケースの出力軸が突出する端面に吸音シートを取り付けるので、その吸音シートの締め付けは全く必要なく、十分な低騒音化を発揮できる。また、吸音シートの取り付けは、その吸音シートを貼付した板金の当該吸音シート貼付面と反対面をモータケースの端面に固着するので、吸音シートの脱落の恐れもない。さらに、板金をモータケースの端面の外形より大きくすればより大きな吸音シートを貼付することができ、より低騒音化が効果的となる。   According to the present invention, since the sound absorbing sheet is attached to the end surface from which the output shaft of the motor case protrudes, the sound absorbing sheet is not required to be tightened at all, and sufficient noise reduction can be achieved. Further, since the sound absorbing sheet is attached to the end surface of the motor case, the surface opposite to the sound absorbing sheet attaching surface of the sheet metal to which the sound absorbing sheet is attached is secured, so that the sound absorbing sheet does not fall off. Furthermore, if the sheet metal is made larger than the outer shape of the end surface of the motor case, a larger sound absorbing sheet can be attached, and noise reduction is more effective.

図1は本発明の実施例のモータ10を示す図である。モータ10は、モータケース11の端面12から出力軸13が突出し、端面12と反対側には取付脚14が設けられている。そして、端面12には、板金20がネジ30で固着され、その板金20の端面12と反対面には吸音シート(例えば、スポンジシート)40が貼付されている。吸音シート40を板金20を介して取り付ける理由は、端面12に、出力軸13の軸受け部分や補強用の溝をモータケース11の絞りにより形成する関係で、端面12に十分な貼付面積を確保することができできないからである。一方、取付脚14は、制振ゴム50を介して天井埋込形空気調和機の筐体60に対してネジ70で取り付けられる。   FIG. 1 is a diagram showing a motor 10 according to an embodiment of the present invention. In the motor 10, the output shaft 13 protrudes from the end surface 12 of the motor case 11, and a mounting leg 14 is provided on the side opposite to the end surface 12. A sheet metal 20 is fixed to the end surface 12 with screws 30, and a sound absorbing sheet (for example, a sponge sheet) 40 is attached to the surface opposite to the end surface 12 of the sheet metal 20. The reason why the sound-absorbing sheet 40 is attached via the sheet metal 20 is that a bearing portion of the output shaft 13 and a reinforcing groove are formed on the end surface 12 by the diaphragm of the motor case 11, so that a sufficient pasting area is secured on the end surface 12. Because you can't. On the other hand, the attachment leg 14 is attached to the casing 60 of the ceiling-embedded air conditioner with a screw 70 via the damping rubber 50.

板金20のモータケース11の端面12への取り付けは、図1のA部分の拡大断面図である図2に示すように、モータケース11に予めバーリング80を設けておき、このバーリング80に対してネジ30を締め付けることにより行われる。モータケース11に直接タップ穴を形成し、そこにネジ30で締め付けることも可能であるが、これはモータ10の性能に影響を与える恐れがないことを条件に、採用できる。   The metal plate 20 is attached to the end surface 12 of the motor case 11 as shown in FIG. 2 which is an enlarged sectional view of a portion A in FIG. This is done by tightening the screw 30. It is possible to directly form a tapped hole in the motor case 11 and tighten it with a screw 30, but this can be adopted on the condition that there is no possibility of affecting the performance of the motor 10.

図3に示すように、板金20はモータケース11の端面12の外形に応じた大きさであり、その中央には、内縁部がモータの出力軸13に接触しない程度に出力軸13に近接する円形穴21が形成され、他の部分にはバーリング80が位置する円形穴22が形成されている。また、吸音シート40は板金20のドーナツ形状に応じた形状であり、その中央には、内縁部がモータの出力軸13に接触しない程度に出力軸13に近接する円形穴41が形成され、他の部分にはネジ30が位置する円形穴42が形成されている。なお、図3において、12aはモータケース11の端面12に形成された軸受け絞り部、12bは端面12に形成された補強用の溝である。   As shown in FIG. 3, the sheet metal 20 is sized according to the outer shape of the end surface 12 of the motor case 11, and is close to the output shaft 13 at the center so that the inner edge does not contact the motor output shaft 13. A circular hole 21 is formed, and a circular hole 22 in which the burring 80 is located is formed in the other part. The sound absorbing sheet 40 has a shape corresponding to the donut shape of the sheet metal 20, and a circular hole 41 that is close to the output shaft 13 is formed at the center so that the inner edge does not contact the output shaft 13 of the motor. In this portion, a circular hole 42 in which the screw 30 is located is formed. In FIG. 3, reference numeral 12 a denotes a bearing throttle formed on the end surface 12 of the motor case 11, and 12 b denotes a reinforcing groove formed on the end surface 12.

以上のようにモータ10の端面12に板金20を介して吸音シート40を貼付した場合の騒音特性を図4(a)に示した。図4(b)は騒音対策を施さなかった場合の騒音特性である。なお、4(a)、(b)の特性とも、モータ10のモータケース11の端面12の外径はφ=97mm、出力軸13の外径はφ=8mm、回転数は500rpmの場合である。また、図4(a)の特性では、板金20の材質は鋼板、厚みは1.2mm、吸音シート40であるスポンジシートの厚みは5mmである。なお、板金20の外径はモータケース11の端面12の外径と同じである。   FIG. 4A shows the noise characteristics when the sound absorbing sheet 40 is attached to the end face 12 of the motor 10 via the sheet metal 20 as described above. FIG. 4B shows the noise characteristics when no noise countermeasure is taken. Note that the characteristics of 4 (a) and (b) are the cases where the outer diameter of the end surface 12 of the motor case 11 of the motor 10 is φ = 97 mm, the outer diameter of the output shaft 13 is φ = 8 mm, and the rotation speed is 500 rpm. . 4A, the material of the sheet metal 20 is a steel plate, the thickness is 1.2 mm, and the thickness of the sponge sheet as the sound absorbing sheet 40 is 5 mm. The outer diameter of the sheet metal 20 is the same as the outer diameter of the end surface 12 of the motor case 11.

図4(a)、(b)から明らかなように、特に耳障りな2.2kHz前後の高音域の騒音が約13dBから2dB程度に大幅に減少し、低騒音化が効果的に行われていることが確認できる。   As is clear from FIGS. 4 (a) and 4 (b), particularly annoying high-frequency noise around 2.2 kHz is greatly reduced from about 13 dB to about 2 dB, and noise reduction is effectively performed. I can confirm that.

なお、板金20の外径をモータケース11の端面12の外径より大きくすれば、より大きな吸音シート40を貼付することができ、より低騒音化が可能となる。   In addition, if the outer diameter of the sheet metal 20 is made larger than the outer diameter of the end surface 12 of the motor case 11, a larger sound absorbing sheet 40 can be attached, and noise can be further reduced.

本発明の実施例のモータの説明図である。It is explanatory drawing of the motor of the Example of this invention. 図1のA部分の拡大断面図である。It is an expanded sectional view of the A part of FIG. 図1のモータの底面図である。It is a bottom view of the motor of FIG. (a)は本実施例のモータの騒音特性図、(b)は本実施例の対策を施さないモータの騒音特性図である。(a) is a noise characteristic diagram of the motor of the present embodiment, and (b) is a noise characteristic diagram of a motor to which the countermeasure of the present embodiment is not applied.

符号の説明Explanation of symbols

10:モータ、11:モータケース、12:端面、13:出力軸、14:取付脚
20:板金、21,22:円形穴
30:ネジ
40:吸音シート(スポンジシート)、41,42:円形穴
50:制振ゴム
60:筐体
70:ネジ
80:バーリング
10: Motor, 11: Motor case, 12: End face, 13: Output shaft, 14: Mounting leg 20: Sheet metal, 21, 22: Circular hole 30: Screw 40: Sound absorbing sheet (sponge sheet), 41, 42: Circular hole 50: Damping rubber 60: Housing 70: Screw 80: Burring

Claims (4)

モータケースの出力軸側の端面に、片面に吸音シートを貼付した板金の他面を固着したことを特徴とするモータ。   A motor characterized in that the other surface of a sheet metal having a sound-absorbing sheet affixed to one side is fixed to an end surface on the output shaft side of the motor case. 請求項1に記載のモータにおいて、
前記固着をネジ止めにより行ったことを特徴とするモータ。
The motor according to claim 1,
A motor characterized in that the fixing is performed by screwing.
請求項2に記載のモータにおいて、
前記端面にバーリングを溶接し、該バーリングに対して前記板金をネジ止めしたことを特徴とするモータ。
The motor according to claim 2,
A motor characterized in that a burring is welded to the end face, and the sheet metal is screwed to the burring.
請求項1、2又は3に記載のモータにおいて、
前記板金および前記吸音シートを、ドーナツ形状とし、それらの内縁部が前記出力軸に接触しない程度に前記出力軸に近接させたことを特徴とするモータ。
The motor according to claim 1, 2 or 3,
The motor according to claim 1, wherein the sheet metal and the sound-absorbing sheet have a donut shape and are close to the output shaft so that their inner edge portions do not contact the output shaft.
JP2006252630A 2006-09-19 2006-09-19 Motor Pending JP2008079368A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015056931A (en) * 2013-09-11 2015-03-23 パナソニック株式会社 Motor and fan motor having the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6397365U (en) * 1986-12-16 1988-06-23
JPH03240581A (en) * 1990-02-20 1991-10-25 Matsushita Electric Ind Co Ltd Motor mounting device
JP2001008401A (en) * 1999-06-22 2001-01-12 Shibaura Densan Kk Noise-proof structure of motor
JP2001037151A (en) * 1999-07-22 2001-02-09 Sanyo Denki Co Ltd Fixing structure of dynamo-electric machine and vibration-isolating connector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6397365U (en) * 1986-12-16 1988-06-23
JPH03240581A (en) * 1990-02-20 1991-10-25 Matsushita Electric Ind Co Ltd Motor mounting device
JP2001008401A (en) * 1999-06-22 2001-01-12 Shibaura Densan Kk Noise-proof structure of motor
JP2001037151A (en) * 1999-07-22 2001-02-09 Sanyo Denki Co Ltd Fixing structure of dynamo-electric machine and vibration-isolating connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015056931A (en) * 2013-09-11 2015-03-23 パナソニック株式会社 Motor and fan motor having the same

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