JP5617613B2 - servo amplifier - Google Patents
servo amplifier Download PDFInfo
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- JP5617613B2 JP5617613B2 JP2010290247A JP2010290247A JP5617613B2 JP 5617613 B2 JP5617613 B2 JP 5617613B2 JP 2010290247 A JP2010290247 A JP 2010290247A JP 2010290247 A JP2010290247 A JP 2010290247A JP 5617613 B2 JP5617613 B2 JP 5617613B2
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- ground terminal
- heat sink
- case cover
- terminal fitting
- servo amplifier
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
Description
本発明は、各種産業機械の運転制御に使用するサーボアンプに関し、詳しくはその本体ケースに配したアース端子の実装構造に関する。 The present invention relates to a servo amplifier used for operation control of various industrial machines, and more particularly to a mounting structure of a ground terminal arranged in a main body case.
周知のようにサーボアンプには、ノイズ対策，感電防止用に専用のアース端子を備え、このアース端子に制御盤のアース座，およびサーボモータから引出したアース線を接続するようにしている（例えば、特許文献１参照）。 As is well known, the servo amplifier has a dedicated ground terminal for noise suppression and electric shock prevention, and the ground terminal of the control panel and the ground wire drawn from the servo motor are connected to this ground terminal (for example, , See Patent Document 1).
次に、本発明の出願人が製造した製品を例に、従来におけるサーボアンプのアース端子構造を図５，図６に示す。各図において、１は本体カバー１ａと前面カバー１ｂからなるモールド樹脂製のケースカバー、２は前面カバー１ｂに配した制御用操作パネル、３は前記ケースカバー１と組合せてサーボアンプの本体ケースを構成する取付台座兼用のヒートシンク、４はヒートシンク３の側面に付設し冷却ファン、５はケースカバー１の内方に配置して前記ヒートシンク３に搭載したパワー半導体モジュールなどを含む各種の回路部品、５ａは回路基板であり、当該サーボアンプはヒートシンク３の取付ベースを背面に向けて制御盤内に設置される。 Next, taking a product manufactured by the applicant of the present invention as an example, a conventional ground terminal structure of a servo amplifier is shown in FIGS. In each figure, 1 is a molded resin case cover comprising a main body cover 1a and a front cover 1b, 2 is a control operation panel disposed on the front cover 1b, and 3 is a combination of the case cover 1 and a servo amplifier main body case. A heat sink that also serves as a mounting base, 4 is attached to the side surface of the heat sink 3 and a cooling fan, 5 is a variety of circuit components including a power semiconductor module mounted on the heat sink 3 and disposed inside the case cover 1, 5a Is a circuit board, and the servo amplifier is installed in the control panel with the mounting base of the heat sink 3 facing the back.
ここで、前記ヒートシンク３はアルミダイカスト製のフレーム構造体で、その後部には取付ベース３ａ，および放熱フィン３ｂが形成され、さらにそのフレーム前部からケースカバー１の下面側に沿って前方に延在するアーム状のアース端子３ｃが一体に立設形成されている。 Here, the heat sink 3 is a frame structure made of aluminum die-casting, and a mounting base 3a and heat radiating fins 3b are formed at the rear portion thereof, and further extended forward along the lower surface side of the case cover 1 from the front portion of the frame. An existing arm-shaped ground terminal 3c is integrally formed upright.
このアース端子３ｃは、図６で示すようにヒートシンク３に組み合わせた本体カバー１ａの内側に沿い前方に延在してその先端部が前面カバー１ｂの前部に突出し、ここに端子ねじ６を螺設してアース線７を接続するようにしている。 As shown in FIG. 6, the ground terminal 3c extends forward along the inside of the main body cover 1a combined with the heat sink 3, and its tip projects from the front of the front cover 1b. The ground wire 7 is connected.
ところで、前記のようにアルミダイカスト製のヒートシンク３にアーム状のアース端子３ｃを一体形成した従来のアース端子構造では次記のような課題がある。
すなわち、ダイカスト鋳物は金型に圧入する溶湯の湯回り不良，空気巻き込みなどで金属組織の内部に巣が生じ易く、その機械的特性は一般に靱性が低い。このために、図５に示したダイカスト製のアーム状アース端子３ｃに外部から衝撃力が加わったり、該端子に接続したアース線７に大きな引っ張り力を加えたりすると、アース端子３ｃが不測に脆性破壊して折損し、このためにサーボアンプの接地機能が喪失することがある。なお、アース端子３ｃの不測な折損を防ぐために、あらかじめアース端子３ｃを太く形成して強度を強化しておくことも考えられるが、このようにするとケースカバー１に収容配置した回路部品６（図６参照）との間の絶縁距離を確保するために部品の配置スペースが制約を受ける。
By the way, the conventional ground terminal structure in which the arm-shaped ground terminal 3c is integrally formed with the heat sink 3 made of aluminum die casting as described above has the following problems.
In other words, die castings tend to form nests in the metal structure due to poor hot water in the molten metal that is press-fitted into the mold or air entrainment, and their mechanical properties are generally low toughness. For this reason, if an impact force is applied from the outside to the die-cast arm-shaped ground terminal 3c shown in FIG. 5 or a large pulling force is applied to the ground wire 7 connected to the terminal, the ground terminal 3c is unexpectedly brittle. It can break and break, which can cause the servo amplifier to lose its grounding function. In order to prevent accidental breakage of the ground terminal 3c, it is conceivable to increase the strength by forming the ground terminal 3c thick beforehand, but in this case, the circuit component 6 accommodated in the case cover 1 (see FIG. 6), the arrangement space of the parts is restricted.
本発明は上記の点に鑑みなされたものであり、ダイカスト製のヒートシンクに連ねてケースカバーの前部に引き出したアース端子に関して、外力を受けて簡単に折損しない靱性，強度と併せて、ケース内に配置した回路部品に対する電気絶縁性が確保できるようにアース端子の実装構造を改良したサーボアンプを提供することを目的とする。 The present invention has been made in view of the above points, and in connection with a ground terminal connected to a die-casting heat sink and pulled out to the front part of the case cover, the toughness and strength that are not easily broken by an external force, An object of the present invention is to provide a servo amplifier having an improved ground terminal mounting structure so as to ensure electrical insulation with respect to the circuit components arranged in the circuit board.
上記目的を達成するために、本発明によれば、ダイカスト製のヒートシンクに樹脂製のケースカバーを組合せた構成になる本体ケースの内部に回路部品を収容した上で、前記ヒートシンクに連ねてケースカバーの前部にアース端子を引出し配置したサーボアンプにおいて、
前記アース端子の端子金具を板金製部品として、該端子金具をケースカバーの壁面に担持して布設した上で、その後端をヒートシンクにねじ締結するものとし（請求項１）、そのアース端子金具は具体的に次記のような態様で構成することができる。
（１）前記アース端子金具は、その長手方向の中間部をケースカバーの内壁面に添わせて布設する（請求項２）。
（２）前記アース端子金具は、その長手方向の中間部をケースカバーの外郭壁面に沿ってその外面側に形成した凹溝内に布設する（請求項３）。
In order to achieve the above object, according to the present invention, a circuit cover is housed in a body case having a structure in which a resin case cover is combined with a die cast heat sink, and the case cover is connected to the heat sink. In the servo amplifier with the ground terminal pulled out at the front of
The terminal fitting of the ground terminal is a sheet metal part, the terminal fitting is carried on the wall surface of the case cover, and the rear end thereof is screwed to the heat sink (Claim 1). Specifically, it can be configured in the following manner.
(1) The ground terminal fitting is laid with its longitudinal intermediate portion attached to the inner wall surface of the case cover (claim 2).
(2) The ground terminal fitting is laid in a concave groove formed on the outer surface side along the outer wall surface of the case cover at the intermediate portion in the longitudinal direction.
上記構成によれば、アース端子の端子金具をダイカスト鋳物に比べて靱性が高い板金製（例えば鋼板の板金加工品）としてケースカバーに担持させたことにより、アース端子の先端に接続したアース線に大きな引っ張り力を加えたり、端子金具に衝撃力が加わったりしてもアース端子金具が簡単に折損することがなくて製品の強度，信頼性が向上する。 According to the above configuration, the terminal fitting of the ground terminal is supported on the case cover as a sheet metal (for example, a sheet metal processed product of a steel sheet) having higher toughness than a die-cast casting. Even if a large pulling force is applied or an impact force is applied to the terminal fitting, the grounding terminal fitting will not be easily broken, improving the strength and reliability of the product.
また、アース端子金具を独立部品としてダイカスト製のヒートシンクに取り付けるようにしたことにより、従来のヒートシンクと比べてその外形，形状がコンパクトとなり、かつダイカスト金型も小形になってコトスの低減化が図れる。 In addition, by attaching the earth terminal fitting to the die-casting heat sink as an independent component, its outer shape and shape are compact compared to conventional heat sinks, and the die-casting die is also small, reducing cost. .
さらに、アース端子金具を樹脂製ケースカバーの外郭壁面に沿ってその外面側に形成した凹溝内に布設する請求項３の構成によれば、アース端子金具とケースカバーの内方に配備した回路部品との間に高い電気絶縁性を確保できる。 Further, according to the configuration of claim 3, the ground terminal fitting is laid in a concave groove formed on the outer surface side along the outer wall surface of the resin case cover. High electrical insulation can be ensured between the parts.
以下、本発明の実施の形態を図１，図２、および図３，図４に示す実施例に基づいて説明する。なお、実施例の図中で図５，図６に対応する部材には同じ符号を付してその説明は省略する。 Hereinafter, embodiments of the present invention will be described based on the examples shown in FIGS. 1, 2, 3, and 4. In the drawings of the embodiment, members corresponding to those in FIGS. 5 and 6 are denoted by the same reference numerals and description thereof is omitted.
まず、本発明の請求項１，２に対応する実施例１を図１，図２で説明する。図において、８は平鋼板を板金加工して作製した短冊形状のアース端子金具であり、このアース端子金具８は、その前端部に板金曲げ加工して形成したＺ字形の端子部を前面カバー１ｂの下部前面に突出して配置し、かつ中間部は本体カバー１ａの内壁面に添わせて後方に延在するよう布設した上で、本体カバー１ａから抜け出た後端部が固定ねじ８ａを介してアルミダイカスト製ヒートシンク３の底部に締結されている。そして、この組立位置で前端の端子部に螺設した端子ねじ６にアース線７を接続するようにしている。なお、アース端子金具８の組立手順としては、回路部品７を組み付けたヒートシンク３にケースカバー１の本体ケース１ａ、前面カバー１ｂを被着した本体ケースの組立状態で、アース端子金具８をケース前方から前面カバー１ａの前面下部に穿設したスリット穴に差込み、本体カバー１ａから後方に抜け出たアース端子金具８の後端部とヒートシンク３との間を固定ねじ８ａで締結する。 First, a first embodiment corresponding to claims 1 and 2 of the present invention will be described with reference to FIGS. In the figure, 8 is a strip-shaped ground terminal fitting made by processing a flat steel plate into a sheet metal, and this ground terminal fitting 8 has a Z-shaped terminal portion formed by bending a sheet metal at the front end portion of the front cover 1b. The intermediate portion is arranged so as to extend rearward along the inner wall surface of the main body cover 1a, and the rear end portion that has come out of the main body cover 1a is inserted through the fixing screw 8a. It is fastened to the bottom of the aluminum die-cast heat sink 3. The ground wire 7 is connected to the terminal screw 6 screwed to the terminal portion at the front end at this assembly position. The ground terminal fitting 8 is assembled in the assembly state of the main body case in which the main body case 1a of the case cover 1 and the front cover 1b are attached to the heat sink 3 to which the circuit component 7 is assembled. Is inserted into a slit hole drilled in the lower part of the front surface of the front cover 1a, and the rear end portion of the ground terminal fitting 8 that has come out rearward from the main body cover 1a and the heat sink 3 are fastened by a fixing screw 8a.
上記の実装構造によれば、後端をヒートシンク３にねじ締結してケースカバー１の前方に引出した板金製のアース端子金具８は、その長手方向に沿った中間部がケースカバー１の本体カバー１ａの内側に担持されている。したがって、アース端子に接続したアース線７に大きな引っ張り力が加わっても、その荷重の一部はケースカバー１に分担され、かつ板金製の端子金具８はアルミダイカスト製に比べて高い靱性を有するので、アース端子金具８は簡単に折損するおそれがなく、図５，図６に示した従来構造のダイカスト製アース端子と比べて高い強度と信頼性を確保できる。 According to the mounting structure described above, the ground terminal fitting 8 made of sheet metal, which has a rear end screwed to the heat sink 3 and pulled out to the front of the case cover 1, has an intermediate portion along the longitudinal direction of the body cover of the case cover 1. It is carried inside 1a. Therefore, even if a large tensile force is applied to the ground wire 7 connected to the ground terminal, a part of the load is shared by the case cover 1 and the metal terminal fitting 8 has higher toughness than that of the aluminum die cast. Therefore, the earth terminal fitting 8 is not easily broken, and high strength and reliability can be ensured as compared with the die-cast earth terminal having the conventional structure shown in FIGS.
また、アース端子金具８を独立部品としたことにより、アルミダイカスト製のヒートシンク３の外形，形状は図５の構造に比べて小形，コンパクトになるので、そのダイカスト金型も小形になって制作費のコストダウンが図れる。 In addition, since the earth terminal fitting 8 is an independent part, the outer shape and shape of the aluminum die cast heat sink 3 are smaller and more compact than the structure shown in FIG. Cost reduction.
次に、先記実施例１の組立構造をベースとして、さらにケースカバー内部の回路部品との電気絶縁性を高めた本発明請求項３に係わる実施例２の構成を図３，図４に示す。
この実施例におけるアース端子金具８は先記実施例１と同様に板金製とし、その後端をダイカスト製のヒートシンク３にねじ締結した上で、前端の端子部がケースカバー１の前面カバー１ｂを貫通してその前部に突き出すようにしているが、アース端子金具８の長手方向に沿った中間部が本体カバー１ｂに対して次記のように布設されている。すなわち、モールド樹脂製のケースカバー１の本体カバー１ａには、アース端子金具８の布設経路に沿って外郭壁面の外面側に凹溝１ａ−１が形成されており、アース端子金具８の中間部はこの凹溝１ａ−１の中に嵌入して布設される。
Next, FIGS. 3 and 4 show the construction of the second embodiment according to the third aspect of the present invention, in which the electrical insulation with the circuit components inside the case cover is further improved based on the assembly structure of the first embodiment. .
The ground terminal fitting 8 in this embodiment is made of sheet metal as in the first embodiment, the rear end of which is screwed to the heat sink 3 made of die cast, and the terminal portion of the front end penetrates the front cover 1b of the case cover 1 The middle portion along the longitudinal direction of the ground terminal fitting 8 is laid on the main body cover 1b as described below. That is, the main body cover 1 a of the case cover 1 made of molded resin is formed with a concave groove 1 a-1 on the outer surface side of the outer wall surface along the laying path of the ground terminal fitting 8. Is installed by being inserted into the groove 1a-1.
この構成によれば、本体ケース１の内方に収納配置した回路部品５，回路基板５ａなどとアース端子金具８とは本体カバー１ａの外郭壁面を挟んでケースの内外に隔離されているので、回路部品５との間に高い電気絶縁性を確保できる。しかも、このアース端子金具８は本体カバー１ａの外形寸法から外方にはみ出すことがなく、かつケースの外面に露呈しているので、サーボアンプを制御盤内に設置して配線作業を行う際には作業員の手がアース端子金具８に触れて除電され易くなる。これにより、静電気の帯電よる不測な電子部品の破壊を効果的に防ぐことができる。 According to this configuration, the circuit component 5, the circuit board 5a, and the like housed and arranged inside the main body case 1 and the ground terminal fitting 8 are separated from each other inside and outside the case with the outer wall surface of the main body cover 1a interposed therebetween. High electrical insulation can be secured between the circuit component 5 and the circuit component 5. In addition, since the ground terminal fitting 8 does not protrude outward from the outer dimensions of the main body cover 1a and is exposed to the outer surface of the case, when the servo amplifier is installed in the control panel and wiring work is performed. Since the operator's hand touches the grounding terminal fitting 8, the charge is easily removed. Thereby, it is possible to effectively prevent unexpected destruction of electronic components due to static electricity.
１ ケースカバー
１ａ 本体カバー
１ｂ 前面カバー
３ ヒートシンク
３ａ 取付ベース
３ｂ 放熱フィン
５ 回路部品
６ アース端子ねじ
７ アース線
８ 板金製のアース端子金具
８ａ 固定ねじ
DESCRIPTION OF SYMBOLS 1 Case cover 1a Body cover 1b Front cover 3 Heat sink 3a Mounting base 3b Radiation fin 5 Circuit component 6 Ground terminal screw 7 Ground wire 8 Sheet metal earth terminal fitting 8a Fixing screw
Claims (3)
前記アース端子の端子金具を板金製部品として、該端子金具をケースカバーの壁面に担持して布設した上で、その後端をヒートシンクにねじ締結したことを特徴とするサーボアンプ。 In a servo amplifier in which a circuit component is housed inside a main body case that is configured by combining a resin case cover with a die cast heat sink, and a ground terminal is drawn out and arranged at the front of the case cover in connection with the heat sink.
A servo amplifier characterized in that the terminal fitting of the ground terminal is a sheet metal part, the terminal fitting is carried on the wall surface of the case cover, and the rear end thereof is screwed to the heat sink.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010290247A JP5617613B2 (en) | 2010-12-27 | 2010-12-27 | servo amplifier |
| CN 201220421770 CN202841781U (en) | 2010-12-27 | 2011-12-27 | Servo amplifier |
| CN 201120553657 CN202603115U (en) | 2010-12-27 | 2011-12-27 | Servo amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010290247A JP5617613B2 (en) | 2010-12-27 | 2010-12-27 | servo amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2012138486A JP2012138486A (en) | 2012-07-19 |
| JP5617613B2 true JP5617613B2 (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2010290247A Active JP5617613B2 (en) | 2010-12-27 | 2010-12-27 | servo amplifier |
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| JP (1) | JP5617613B2 (en) |
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| JP5562395B2 (en) * | 2012-10-18 | 2014-07-30 | 三菱電機株式会社 | Assembly method of rotating electrical machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6190100U (en) * | 1984-11-14 | 1986-06-11 | ||
| JPH0723982Y2 (en) * | 1987-11-17 | 1995-05-31 | 富士通株式会社 | Electronic device housing |
| JPH0371574A (en) * | 1989-08-09 | 1991-03-27 | Canon Inc | Machine case |
| JP4285270B2 (en) * | 2004-02-24 | 2009-06-24 | 富士電機システムズ株式会社 | Housing structure of drive unit for motor drive |
| JP2008140803A (en) * | 2006-11-30 | 2008-06-19 | Fuji Electric Fa Components & Systems Co Ltd | Heat sink |
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