JP2007278428A

JP2007278428A - Bearing device

Info

Publication number: JP2007278428A
Application number: JP2006107222A
Authority: JP
Inventors: Tetsushi Hayashi; 徹史林
Original assignee: Sanyo Electric Co Ltd; Sanyo Seimitsu Co Ltd
Current assignee: Sanyo Electric Co Ltd; Nidec Seimitsu Corp
Priority date: 2006-04-10
Filing date: 2006-04-10
Publication date: 2007-10-25

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device capable of eliminating the work of fastening a thrust plate to a bearing and surely preventing rotation of the bearing. <P>SOLUTION: The bearing device 15 includes four rectangular standing pieces B<SB>1</SB>to B<SB>4</SB>as a bearing holder section. The four rectangular standing pieces are formed by separately rising rectangular peripheral areas respectively extending outwardly from four sides of a square backing plate area S of a plate member 11 at slightly blunt angles with respect to the backing plate area S. The special shape bearing 40 in a square form is press-fitted and secured in a reception hole H defined inside the rectangular standing pieces B<SB>1</SB>to B<SB>4</SB>. The special shape bearing 40 includes a shaft penetrating hole 40a and the thrust plate 30 is interposed between the backing plate area S and an end face of the special shape bearing 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、モータ等に使用される軸受装置に関する。 The present invention relates to a bearing device used for a motor or the like.

特開平１１−２５０５６２のスピンドルモータにおいては、筒状のバーリング加工部を軸受ホルダー部として持つハウジングと、このバーリング加工部の孔に圧入したメタル軸受と、このメタル軸受の下端側段差に加締固定したスラスト板とを有するスラスト軸受装置が開示されている。
特開平１１−２５０５６２（図１） In the spindle motor disclosed in JP-A-11-250562, a housing having a cylindrical burring portion as a bearing holder portion, a metal bearing press-fitted into a hole in the burring portion, and caulking and fixing to a lower end side step of the metal bearing A thrust bearing device having a thrust plate is disclosed.
JP-A-11-250562 (FIG. 1)

上記のスラスト軸受においては、板材に形成したバーリング加工部は無底であるため、スラスト軸受装置とするには貫通軸孔を持つメタル軸受の下端側段差にスラスト板を加締固定する工程を要している。また、メタル軸受の抜去耐力はバーリング加工部の内径とメタル軸受の外径との締まり嵌めの公差管理が重要となるものの、メタル軸受の底面側段差にスラスト板が加締固定されているため、加締時の歪みがメタル軸受の端部外径の狂いをもたらしているので、上記の締まり嵌めを緩くする必要上、メタル軸受の回り止め力が悪化し、歩留まりの低下を招く。 In the above thrust bearing, since the burring portion formed on the plate material is bottomless, a process of caulking and fixing the thrust plate to the step on the lower end side of the metal bearing having the through-shaft hole is required for the thrust bearing device. is doing. In addition, although the tolerance of the interference fit between the inner diameter of the burring part and the outer diameter of the metal bearing is important for the metal bearing removal resistance, the thrust plate is caulked and fixed to the step on the bottom side of the metal bearing. Since distortion at the time of caulking causes a deviation in the outer diameter of the end of the metal bearing, it is necessary to loosen the above-mentioned interference fit, and the detent force of the metal bearing deteriorates, resulting in a decrease in yield.

そこで上記問題点を鑑み、本発明の課題は、軸受にスラスト板を加締固定する作業を排することができると共に軸受の確実な回り止めを実現できる軸受装置を提供することにある。 Therefore, in view of the above problems, an object of the present invention is to provide a bearing device that can eliminate the work of caulking and fixing a thrust plate to the bearing and can realize reliable rotation prevention of the bearing.

本発明に係る軸受装置は、受け板域を残してその周辺域を相離して前記受け板域側へ切り起した３枚以上の起立片を備える板材と、これらの起立片の内側に画成された受け穴に圧入固定した異形軸受とを有して成ることを特徴とする。 The bearing device according to the present invention includes a plate member including three or more upright pieces that are cut and raised toward the receiving plate area while leaving the surrounding area apart from the receiving plate area, and defined inside the rising pieces. And a deformed bearing press-fitted into the receiving hole.

板材の切り起し加工により軸受ホルダー部となる３枚以上の起立片とスラスト板としても機能する受け板域が残されるので、スラスト板の部品点数を削減でき、しかも軸受にスラスト板を加締固定する作業が不要で、製造コスト安となる。また、異形軸受を３枚以上の起立片の内側に画成された受け穴に圧入固定したものであるから、異形軸受の回り止め効果が確実化し、歩留まりの向上に資する。板材の裏面と受け板域の裏面とが自ずと平坦面であるという利点もある。なお、切り起し角度をやや鈍角とすれば異形軸受の抜去耐力が増強する。 By cutting and raising the plate material, three or more upright pieces that serve as bearing holders and a receiving plate area that also functions as a thrust plate remain, so the number of parts of the thrust plate can be reduced, and the thrust plate is crimped to the bearing Fixing work is not required and the manufacturing cost is reduced. Further, since the deformed bearing is press-fitted and fixed in a receiving hole defined inside three or more upright pieces, the anti-rotation effect of the deformed bearing is ensured, and the yield is improved. There is also an advantage that the back surface of the plate material and the back surface of the receiving plate area are naturally flat surfaces. In addition, if the cut-and-raised angle is set to be a little obtuse, the removal strength of the irregular shaped bearing is enhanced.

異形軸受は焼結体などの一体成形体であるので、一部又は全部の起立片に係合する係合部を特別設けても好い。 Since the odd-shaped bearing is an integrally molded body such as a sintered body, it is preferable to provide an engagement portion that engages with a part or all of the standing pieces.

ここで、Ｎを３以上の自然数とすると、受け板域と異形軸受との外形は共に正Ｎ角形状であり、起立片の枚数はＮ枚であり、異形軸受の角部を相隣る起立片同士の挟間に位置決めして成ることが望ましい。Ｎが３の正三角形の場合はデットスペースができ易く、また、起立片の幅寸法が狭い場合は起立片の強度が下がるため、Ｎが４の正４角形とするのが望ましい。 Here, when N is a natural number of 3 or more, the outer shape of the receiving plate area and the odd-shaped bearing is both a regular N-square shape, the number of standing pieces is N, and the corners of the irregular-shaped bearing are adjacent to each other. It is desirable to be positioned between the pieces. When N is a regular triangle of 3, a dead space is easily formed, and when the width of the standing piece is narrow, the strength of the standing piece is lowered.

上記の軸受装置はスラスト軸受装置として、必要ならばラジアル軸受装置として利用可能なものであるが、異形軸受は軸貫通孔を備えており、受け板域と異形軸受の端面との間にスラスト板を介装して成る構成では、受け板域が軸端を受けるのではなく、受け板域上に載る専用のスラスト板が軸端を受けることになるので、滑性や耐磨耗性に優れたスラスト板により遜色のないスラスト軸受装置を得ることができる。 The above bearing device can be used as a thrust bearing device, and if necessary, as a radial bearing device. However, the irregular shape bearing has a shaft through hole, and a thrust plate is provided between the receiving plate region and the end surface of the irregular shape bearing. In the configuration consisting of, the receiving plate area does not receive the shaft end, but a dedicated thrust plate placed on the receiving plate region receives the shaft end, so it has excellent lubricity and wear resistance A thrust bearing device inferior to the thrust plate can be obtained.

ここで、起立片の抜き跡孔の間の狭隘域は受け板域の隅部に相当する狭窄部で架橋的に連結しているため、受け板域の中心点で軸端を直接受ける場合は、その中心点に加わる集中荷重により狭窄部に対する曲げモーメントが大きく、板材の板厚が薄いときなどでは狭窄部で撓みが生じ易く、軸端レベルが狂い易い。ところが、スラスト板が介在すると、受け板域が分布荷重を受けるため、狭窄部に対する曲げモーメントは小さく、狭窄部に撓みが生じ難く、それ故、起立片の幅を広くして強度を高めることができる。斯かる場合、スラスト板を軸受に加締固定する従前の作業に比べ、スラスト板を異形軸受と共に複数の起立片内に押し込む方が作業性は向上する。 Here, since the narrow area between the trace holes of the upright piece is connected in a bridging manner at the narrowed portion corresponding to the corner of the backing plate area, when receiving the shaft end directly at the center point of the backing plate area, The bending load on the constricted portion is large due to the concentrated load applied to the center point, and when the plate material is thin, the constricted portion is likely to bend and the shaft end level is likely to be distorted. However, when the thrust plate is interposed, the receiving plate region receives a distributed load, so the bending moment with respect to the constricted portion is small and the constricted portion is not easily bent. Therefore, the width of the standing piece can be widened to increase the strength. it can. In such a case, the workability is improved by pushing the thrust plate into the plurality of upright pieces together with the deformed bearing, compared to the conventional work of crimping and fixing the thrust plate to the bearing.

なお、上記の軸受装置はブラシレスモータ等のモータステータに用いるのが好適である。 In addition, it is suitable to use said bearing apparatus for motor stators, such as a brushless motor.

本発明によれば、スラスト板の部品点数を削減でき、しかも軸受にスラスト板を加締固定する作業が不要となり、製造コスト安となる。また、異形軸受を３枚以上の起立片で包囲された受け穴に圧入固定したものであるから、軸受の回り止め効果が確実化し、歩留まりの向上に資する。 According to the present invention, the number of parts of the thrust plate can be reduced, and further, the work of crimping and fixing the thrust plate to the bearing is unnecessary, and the manufacturing cost is reduced. Further, since the deformed bearing is press-fitted and fixed in a receiving hole surrounded by three or more upright pieces, the effect of preventing rotation of the bearing is ensured and the yield is improved.

次に、本発明の実施形態を添付図面に基づいて説明する。図１（Ａ）は本発明の実施例に係る扁平形ブラシレスモータを示す外観斜視図、図１（Ｂ）は同扁平形ブラシレスモータのロータを取り外した状態を示す斜視図、図２（Ａ）は同扁平形ブラシレスモータのロータを取り外したステータ側を示す平面図、図２（Ｂ）は図２（Ａ）中のｂ−ｂ線で切断した状態を示す断面図、図２（Ｃ）は同ステータ側を示す背面図、図３は同ステータ側のスラスト軸受装置を示す組立斜視図、図４（Ａ）は同スラスト軸受装置の板材を示す平面図、図４（Ｂ）は同スラスト軸受装置の板材を示す正面図である。 Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1A is an external perspective view showing a flat brushless motor according to an embodiment of the present invention, FIG. 1B is a perspective view showing a state in which the rotor of the flat brushless motor is removed, and FIG. 2A. Is a plan view showing the stator side from which the rotor of the flat brushless motor is removed, FIG. 2B is a cross-sectional view showing a state cut along line bb in FIG. 2A, and FIG. 3 is a rear view showing the stator side, FIG. 3 is an assembled perspective view showing the thrust bearing device on the stator side, FIG. 4A is a plan view showing a plate material of the thrust bearing device, and FIG. 4B is the thrust bearing. It is a front view which shows the board | plate material of an apparatus.

本例の扁平形ブラシレスモータは、ステータ１０とモータ回転軸２１を固定したロータ２０とから成る。ステータ１０は、ハウジング又はシャーシとしての平板状の板材１１と、この上に搭載されて丸孔１２ａを持つフレキシブル印刷配線基板１２と、この基板１２上に搭載された制御回路用集積回路Ｉ３及び丸孔１２ａの周りに配置された複数のコイル巻線１４とを有する。なお、１２ｂは板材１１の突片部１１ａに形成された外部接続用端子パターン、１２ｃは配線パターンである。 The flat brushless motor of this example includes a stator 10 and a rotor 20 to which a motor rotating shaft 21 is fixed. The stator 10 includes a flat plate material 11 as a housing or a chassis, a flexible printed wiring board 12 mounted thereon and having a round hole 12a, a control circuit integrated circuit I3 mounted on the board 12, and a round circuit. And a plurality of coil windings 14 arranged around the hole 12a. In addition, 12b is an external connection terminal pattern formed on the protruding piece 11a of the plate member 11, and 12c is a wiring pattern.

板材１１のうち基板１２の丸孔１２ａに嵌る中央部分がスラスト軸受装置１５として構成されている。本例のスラスト軸受装置１５は、板材１１のうち正方形状の受け板域Ｓを残してその４辺の矩形周辺域を相離して受け板域Ｓへやや鈍角で切り起し形成された４枚の矩形起立片Ｂ_１〜Ｂ_４と、それらの抜き跡孔ｈ_１〜ｈ_４とを有している。抜き跡孔ｈ_１〜ｈ_４のうち隣接する抜き跡孔同士の間は扇形状の狭隘域Ｅ_１〜Ｅ_４となっており、狭隘域Ｅ_１〜Ｅ_４は受け板域Ｓの隅部に相当する狭窄部Ｑ_１〜Ｑ_４で架橋的に連結している。矩形起立片Ｂ_１〜Ｂ_４は、軸受ホルダー部として機能し、同一形状の平板であり、起立高さも同一である。 A central portion of the plate material 11 that fits into the round hole 12 a of the substrate 12 is configured as a thrust bearing device 15. The thrust bearing device 15 of the present example is formed by cutting and raising a little obtuse angle to the receiving plate area S by separating the rectangular peripheral areas of the four sides while leaving the square receiving plate area S of the plate material 11. Rectangular upright pieces B _{1 to} B ₄ and their trace holes h _{1 to} h ₄ . Between the adjacent trace holes among the trace holes h _{1 to} h ₄ , fan-shaped narrow areas E _{1 to} E ₄ are formed, and the narrow areas E _{1 to} E ₄ are formed at the corners of the receiving plate area S. The corresponding narrowed portions Q _{1 to} Q ₄ are connected in a cross-linking manner. The rectangular upright pieces B _{1 to} B ₄ function as bearing holder portions, are flat plates having the same shape, and have the same standing height.

これらの矩形起立片Ｂ_１〜Ｂ_４の内側に形成された受け穴Ｈには、正方形のスラスト板３０が落し込まれて受け板域Ｓに重なっており、また、受け穴Ｈには貫通軸孔４０ａを持つ正方形の異形軸受４０が圧入固定されている。異形軸受４０の角部は矩形起立片Ｂ_１〜Ｂ_４のうち相隣接する起立片同士の隙間に位置している。 A square thrust plate 30 is dropped into the receiving hole H formed inside the rectangular upright pieces B _{1 to} B ₄ and overlaps the receiving plate area S. The receiving hole H has a through shaft. A square deformed bearing 40 having a hole 40a is press-fitted and fixed. The corner portion of the odd-shaped bearing 40 is located in a gap between adjacent standing pieces among the rectangular standing pieces B _{1 to} B ₄ .

このように、板材１１の切り起し加工により軸受ホルダー部となる４枚の矩形起立片Ｂ_１〜Ｂ_４が形成されると共に受け板域Ｓが残されるので、軸受にスラスト板を加締固定する作業を無くすことができる。また、異形軸受４０を起立片Ｂ_１〜Ｂ_４の内側に画成された受け穴Ｈに圧入固定したものであるから、異形軸受４０の回り止め効果が確実化し、歩留まりの向上に資する。しかも、板材１１の裏面と受け板域Ｓの裏面とが自ずと平坦面であるという利点もある。また、起立片Ｂ_１〜Ｂ_４の切り起し角度をやや鈍角としてあるので、異形軸受４０の抜去耐力が増強する。 In this way, four rectangular upright pieces B _{1 to} B ₄ that serve as bearing holder portions are formed by cutting and raising the plate material 11, and the receiving plate area S is left, so that the thrust plate is caulked and fixed to the bearing. Can be eliminated. Further, since the deformed bearing 40 is press-fitted and fixed in the receiving hole H defined inside the standing pieces B _{1 to} B ₄ , the anti-rotation effect of the deformed bearing 40 is ensured, and the yield is improved. Moreover, there is an advantage that the back surface of the plate material 11 and the back surface of the receiving plate area S are naturally flat surfaces. Moreover, since the cut-and-raised angle of the upright pieces B _{1 to} B ₄ is set to be a little obtuse, the pulling strength of the deformed bearing 40 is enhanced.

特に、異形軸受４０は正４角形状であるので、板材１１のデットスペースを少なくでき、また、起立片Ｂ_１〜Ｂ_４の幅寸法を広くできるので、起立片Ｂ_１〜Ｂ_４の強度が上がり、異形軸受４０の保持力を高めることができる。 In particular, the profiled bearing 40 since the positive square shape, it is possible to reduce the dead space of the plate material 11, and because the width of the standing piece _B 1 .about.B ₄ can be widened, the intensity of the standing piece _B 1 .about.B ₄ As a result, the holding force of the deformed bearing 40 can be increased.

本例においてスラスト板３０を除いて異形軸受４０だけを受け穴Ｈに圧入固定した場合でも、受け板域Ｓがスラスト板として機能するので、スラスト軸受装置として使用可能である。滑性や耐磨耗性に優れたスラスト板３０を用いると、遜色のないスラスト軸受装置を得ることができる。また、スラスト板３０を用いると、受け板域Ｓにかかる荷重を分散できるので、狭窄部Ｑ_１〜Ｑ_４に撓みが生じ難く、それ故、起立片Ｂ_１〜Ｂ_４の幅を広くして強度を高めることができる。 In this example, even when only the odd-shaped bearing 40 is press-fitted and fixed in the receiving hole H except for the thrust plate 30, the receiving plate region S functions as a thrust plate, and therefore can be used as a thrust bearing device. When a thrust plate 30 having excellent lubricity and wear resistance is used, an inferior thrust bearing device can be obtained. In addition, when the thrust plate 30 is used, the load applied to the receiving plate region S can be dispersed, so that the constriction portions Q _{1 to} Q ₄ are not easily bent. Therefore, the width of the standing pieces B _{1 to} B ₄ is increased. Strength can be increased.

なお、スラスト板３０としては正方形状に限らず、その角部から狭窄部Ｑ_１〜Ｑ_４を介して狭隘域Ｅ_１〜Ｅ_４と重なる張出片を有していても構わない。また、同様に、異形軸受４０もこの張出片に重なる輻射部を有していても構わない。狭窄部Ｑ_１〜Ｑ_４に加わる曲げモーメントを更に減じることができるからである。 The thrust plate 30 is not limited to a square shape, and may have a projecting piece that overlaps the narrow areas E _{1 to} E ₄ from the corners via the narrowed areas Q _{1 to} Q ₄ . Similarly, the odd-shaped bearing 40 may have a radiating portion that overlaps the protruding piece. This is because the bending moment applied to the constriction portions Q _{1 to} Q ₄ can be further reduced.

本例においては、抜き跡孔ｈ_１〜ｈ_４は板材１１に載るフレキシブル印刷配線基板１２の丸穴１２ａの穴縁で一部塞がれているが、この丸穴１２ａを起立片Ｂ_１〜Ｂ_４の成す外形角柱が嵌る角穴とすれば、抜き跡孔ｈ_１〜ｈ_４板を完全に塞ぐことができる。また、部品点数は増えるものの、受け穴Ｈに異形軸受４０を圧入固定した後、起立片Ｂ_１〜Ｂ_４を締め込むと共に抜き跡孔ｈ_１〜ｈ_４に嵌る締め輪を用いれば、異形軸受４０を保持する力が増強し、また抜き跡孔ｈ_１〜ｈ_４を塞ぐことができる。 In this example, the trace holes h _{1 to} h ₄ are partially closed by the hole edges of the round holes 12 a of the flexible printed wiring board 12 mounted on the plate material 11, but the round holes 12 a are erected pieces B ₁ to B ₁ . if square hole contour prism formed by the B ₄ is fitted, it is possible to block the vent Atoana h ₁ to h ₄ plate completely. Although the number of parts is increased, after the press-fitted profiled bearing 40 into the receiving hole H, the use of the clamping ring to fit vent Atoana h ₁ to h ₄ with tightening the standing piece B ₁ .about.B _4, irregular bearing The force holding 40 is enhanced, and the trace holes h _{1 to} h ₄ can be closed.

（Ａ）は本発明の実施例に係る扁平形ブラシレスモータを示す外観斜視図、（Ｂ）は同扁平形ブラシレスモータのロータを取り外した状態を示す斜視図である。(A) is an external appearance perspective view which shows the flat brushless motor which concerns on the Example of this invention, (B) is a perspective view which shows the state which removed the rotor of the flat brushless motor. （Ａ）は同扁平形ブラシレスモータのロータを取り外した状態を示す平面図、（Ｂ）は図２（Ａ）中のｂ−ｂ線で切断した状態を示す断面図、（Ｃ）は同扁平形ブラシレスモータのロータを取り外した状態を示す背面図である。(A) is a top view which shows the state which removed the rotor of the flat brushless motor, (B) is sectional drawing which shows the state cut | disconnected by the bb line in FIG. 2 (A), (C) is the flat It is a rear view which shows the state which removed the rotor of the shape brushless motor. 同ステータ側のスラスト軸受装置を示す組立斜視図である。It is an assembly perspective view showing the thrust bearing device on the same side. （Ａ）は同スラスト軸受装置の板材を示す平面図、（Ｂ）は同スラスト軸受装置の板材を示す正面図である。(A) is a top view which shows the board | plate material of the thrust bearing apparatus, (B) is a front view which shows the board | plate material of the thrust bearing apparatus.

符号の説明Explanation of symbols

１０…ステータ
１１…板材
１１ａ…突片部
１２…フレキシブル印刷配線基板
１２ａ…丸孔
１２ｂ…外部接続用端子パターン
１２ｃ…配線パターン
１３…制御用集積回路
１４…コイル巻線
１５…スラスト軸受装置
２０…ロータ
２１…モータ回転軸
３０…スラスト板
４０…異形軸受
４０ａ…貫通軸孔
Ｂ_１〜Ｂ_４…矩形起立片
Ｅ_１〜Ｅ_４…狭隘域
Ｈ…受け穴
ｈ_１〜ｈ_４…抜き跡孔
Ｑ_１〜Ｑ_４…狭窄部
Ｓ…受け板域 DESCRIPTION OF SYMBOLS 10 ... Stator 11 ... Plate material 11a ... Projection piece part 12 ... Flexible printed wiring board 12a ... Round hole 12b ... External connection terminal pattern 12c ... Wiring pattern 13 ... Control integrated circuit 14 ... Coil winding 15 ... Thrust bearing device 20 ... The rotor 21 ... motor rotary shaft 30 ... thrust plate 40 ... profiled bearing 40a ... through axial bore _B 1 .about.B 4 _... rectangular standing piece _E 1 to E 4 _... narrow range H ... receiving holes _h 1 to h 4 _... vent Atoana Q _{1 to} Q ₄ ... Stenosis S ... Receiving plate area

Claims

受け板域を残してその周辺域を相離して前記受け板域側へ切り起した３枚以上の起立片を備える板材と、これらの起立片の内側に画成された受け穴に圧入固定した異形軸受とを有して成ることを特徴とする軸受装置。 A plate material provided with three or more upright pieces cut and raised to the receiving plate area side while leaving the receiving plate area apart, and press-fitted and fixed to receiving holes defined inside these upright pieces A bearing device comprising an odd-shaped bearing.

請求項１に記載の軸受装置において、Ｎを３以上の自然数とすると、前記受け板域と前記異形軸受との外形は共に正Ｎ角形状であり、前記起立片の枚数はＮ枚であり、前記異形軸受の角部を相隣る前記起立片同士の挟間に位置決めして成ることを特徴とする軸受装置。 In the bearing device according to claim 1, when N is a natural number of 3 or more, the outer shape of the receiving plate area and the deformed bearing is a regular N square shape, and the number of the standing pieces is N, A bearing device, characterized in that a corner portion of the deformed bearing is positioned between adjacent upright pieces.

請求項２に記載のスラスト軸受装置において、前記Ｎは４であることを特徴とする軸受装置。 The thrust bearing device according to claim 2, wherein the N is four.

請求項１乃至請求項３のいずれか一項に記載の軸受装置において、前記異形軸受は軸貫通孔を備えており、前記受け板域と前記異形軸受の端面との間にスラスト板を介装して成ることを特徴とする軸受装置。 4. The bearing device according to claim 1, wherein the deformed bearing includes a shaft through hole, and a thrust plate is interposed between the receiving plate region and the end surface of the deformed bearing. A bearing device comprising:

請求項１乃至請求項４のいずれか一項に規定する軸受装置を用いて成ることを特徴とするモータ。 A motor comprising the bearing device defined in any one of claims 1 to 4.