JPH0739102A - Small-sized motor - Google Patents

Small-sized motor

Info

Publication number
JPH0739102A
JPH0739102A JP20000693A JP20000693A JPH0739102A JP H0739102 A JPH0739102 A JP H0739102A JP 20000693 A JP20000693 A JP 20000693A JP 20000693 A JP20000693 A JP 20000693A JP H0739102 A JPH0739102 A JP H0739102A
Authority
JP
Japan
Prior art keywords
pressurizing
stopper
spring
pressurizing spring
pressurization
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.)
Pending
Application number
JP20000693A
Other languages
Japanese (ja)
Inventor
Hirokazu Nichiki
浩和 日岐
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.)
Nidec Instruments Corp
Original Assignee
Sankyo Seiki 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 Sankyo Seiki Manufacturing Co Ltd filed Critical Sankyo Seiki Manufacturing Co Ltd
Priority to JP20000693A priority Critical patent/JPH0739102A/en
Publication of JPH0739102A publication Critical patent/JPH0739102A/en
Pending legal-status Critical Current

Links

Landscapes

  • Motor Or Generator Frames (AREA)

Abstract

PURPOSE:To make it possible to adjust pressurization applied in a thrust direction. CONSTITUTION:A small-sized motor 1 has a pressurizing spring 9 having a pressurizing part 13 formed by cutting and raising a part of a plate spring 16, and a stopper 8 for preventing this pressurizing spring 9 from coming out. And this stopper 8 has a hole 10 in the center for keeping the pressurizing spring 9 in, and has stepped parts 11a, 11b, and 11c having thrust-direction heights different to each other in the circumferential direction. And the pressurizing spring 9 has fixing-by-engaging parts 14 which engage with the stepped parts 11a, 11b, and 11c of the stopper 8. Pressurization to the contact part 15 of the rotor shaft 3 with the pressurizing part 13 of the pressurizing spring 9 is changed, by changing the engaging spots between this fixing-by-engaging part 14 and the stepped parts 11a, 11b, and 11c of the stopper 8.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ロータ軸に対して、ス
ラスト方向に加える与圧の調整を可能にした小型モータ
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small motor capable of adjusting a pressure applied to a rotor shaft in a thrust direction.

【0002】[0002]

【従来の技術】例えばフロッピーディスク駆動装置の磁
気ヘッド送り用として使用されている従来の小型モータ
には、ステップモータ(特開平3−3651号公報)が
あり、このステップモータでは、スラスト方向の与圧手
段は、モータケースの開口端面にスポット溶接またはか
しめなどで固定されるサイドプレートの一部を切り起こ
して与圧ばねとし、この与圧ばねによってロータを軸方
向に付勢する構造となっている。
2. Description of the Related Art For example, a conventional small motor used for feeding a magnetic head of a floppy disk drive device is a step motor (JP-A-3-3651). In this step motor, a thrust direction is applied. The pressure means has a structure in which a part of the side plate fixed to the opening end surface of the motor case by spot welding or caulking is cut and raised to form a pressurizing spring, and the rotor is axially biased by the pressurizing spring. There is.

【0003】[0003]

【発明が解決しようとする課題】しかし上記ステップモ
ータでは、前記与圧ばねがモータケースに直接固定され
る構造となっているので、スラスト方向のガタあるいは
それに比例した与圧は、モータケースの長さやその他の
部品によって決定されてしまい、与圧を調整することが
できないという問題があった。
However, in the above step motor, since the pressurizing spring is directly fixed to the motor case, the play in the thrust direction or the pressurization proportional to the play is generated by the length of the motor case. There is a problem that the pressurization cannot be adjusted because it is determined by the sheath and other parts.

【0004】[0004]

【発明の目的】そこで、本発明は、前記問題点に着目し
てなされたもので、その目的は、ロータ軸に対して、ス
ラスト方向に加える与圧を調整することのできる小型モ
ータを提供することにある。
SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a small motor capable of adjusting a pressure applied to a rotor shaft in a thrust direction. Especially.

【0005】[0005]

【課題を解決するための手段】前記目的を達成する本発
明は、小型モータにおいて、板ばねの一部を切り起こし
て形成した与圧部を有する与圧ばねと、この与圧ばねを
抜け止めするストッパとを備え、このストッパは、中心
に与圧ばねを収容する孔と、円周方向にスラスト方向高
さの相違する段部とを有し、上記与圧ばねは、ストッパ
の段部に係止する係止部を有し、この係止部とストッパ
の段部との係止箇所を変えることによりロータ軸と与圧
部との接点部分の与圧を変化させる構造としたものであ
る。
SUMMARY OF THE INVENTION The present invention which achieves the above object is, in a small motor, a pressurizing spring having a pressurizing portion formed by cutting and raising a part of a leaf spring, and a retainer for the pressurizing spring. The stopper has a hole for accommodating the pressurizing spring in the center and a step portion having a different height in the thrust direction in the circumferential direction, and the pressurizing spring is provided on the step portion of the stopper. The structure has a locking portion for locking, and the pressure applied to the contact portion between the rotor shaft and the pressure applying portion is changed by changing the locking location between the locking portion and the step portion of the stopper. .

【0006】[0006]

【作用】組立完了後、モータ特性のテストを行なう際
に、与圧ばねを付勢力に抗して押しながら回転させ、そ
の係止部とストッパの段部との係止箇所を変えることに
より、優れたモータ特性が得られるように、ロータ軸と
与圧部との接点部分の与圧を調整する。
After the assembly is completed, when the motor characteristics are tested, the pressurizing spring is rotated while being pressed against the urging force, and the engaging portion between the engaging portion and the stepped portion of the stopper is changed. The pressurization of the contact portion between the rotor shaft and the pressurizing portion is adjusted so that excellent motor characteristics can be obtained.

【0007】このように、与圧ばねは、その係止部とス
トッパの段部との係止箇所を変えることにより、ロータ
軸と与圧部との接点部分の与圧を変化させる構造とした
ので、部品精度や組立精度のバラツキによる与圧の増減
を吸収し、与圧を適正値に調整することができる。ま
た、与圧を調整することで、ロストルクを最小値に調整
でき、トルク、起動電圧、ノイズなどを個々の小型モー
タで調整することができる。
As described above, the pressurizing spring has a structure in which the pressurizing of the contact portion between the rotor shaft and the pressurizing portion is changed by changing the engaging portion between the engaging portion and the step portion of the stopper. Therefore, it is possible to absorb the increase and decrease of the pressurization due to the variation of the parts accuracy and the assembly accuracy and adjust the pressurization to an appropriate value. Further, by adjusting the pressurization, the loss torque can be adjusted to the minimum value, and the torque, starting voltage, noise, etc. can be adjusted by each small motor.

【0008】[0008]

【実施例】図1〜図3に示すように、本実施例に係る小
型モータ1はステップモータ2に適用したものである。
このステップモータ2は、ロータ軸3にマグネット4を
装着したロータ5と、コイル6を覆ってステータコアを
兼ね備えたモータケース7とを備え、パルス状の電圧に
よって一定角度回転駆動できる構造となっている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, a small motor 1 according to this embodiment is applied to a step motor 2.
The step motor 2 includes a rotor 5 in which a magnet 4 is mounted on a rotor shaft 3 and a motor case 7 that covers a coil 6 and also serves as a stator core, and has a structure that can be rotationally driven at a fixed angle by a pulsed voltage. .

【0009】本実施例の要旨は、前記ロータ軸3をスラ
スト方向に付勢する与圧を調整可能にした構造としたも
のである。すなわち、モータケース7の開口端面にスト
ッパ8がスポット溶接またはかしめなどで固定され、こ
のストッパ8は、与圧ばね9を抜け止めするもので、中
心に与圧ばね9を収容する孔10が形成され、円周方向
にスラスト方向高さの相違する一対の段部11a、11
b、11cが三段連なって形成され、ロータ軸3を中心
として、点対称形状を有する。最も高い段部11aに切
欠口12が形成され、この切欠口12を介して与圧ばね
9を取り付け、あるいは取り外しできる構造となってい
る。
The gist of the present embodiment is a structure in which the pressurizing force for urging the rotor shaft 3 in the thrust direction can be adjusted. That is, the stopper 8 is fixed to the open end surface of the motor case 7 by spot welding or caulking, and the stopper 8 prevents the pressurizing spring 9 from coming off, and the hole 10 for accommodating the pressurizing spring 9 is formed at the center. And a pair of step portions 11a, 11 having different thrust heights in the circumferential direction.
b and 11c are formed in three stages and have a point-symmetrical shape with the rotor shaft 3 as the center. A cutout 12 is formed at the highest step 11a, and the pressurizing spring 9 can be attached or detached via the cutout 12.

【0010】前記与圧ばね9は、板ばね16で形成さ
れ、この板ばね16の一部を切り起こして形成した与圧
部13を有し、外周部に一対の係止部14が突起状に形
成されている。この与圧ばね9は工具を差し込む工具孔
17を有し、工具で与圧ばね9を付勢力に抗して押しな
がら回転させ、係止部14とストッパ8の段部11a、
11b、11cとの係止箇所を変えることにより、与圧
部13のたわみを変化させ、ロータ軸3と与圧部13と
の接点部分15の与圧を変化させる構造となっている。
The pressurizing spring 9 is formed of a leaf spring 16 and has a pressurizing portion 13 formed by cutting and raising a part of the leaf spring 16, and a pair of engaging portions 14 are projectingly formed on the outer peripheral portion. Is formed in. The pressurizing spring 9 has a tool hole 17 into which a tool is inserted, and the pressurizing spring 9 is rotated while being pressed against the urging force by the tool to rotate the pressurizing spring 9 and the step portion 11a of the stopper 8.
By changing the locking position with 11b and 11c, the deflection of the pressurizing portion 13 is changed, and the pressurizing of the contact portion 15 between the rotor shaft 3 and the pressurizing portion 13 is changed.

【0011】次に、本実施例の作用を説明する。組立最
終工程において、ストッパ8の段部11a、11b、1
1cに切欠口12から係止部14を入れ、与圧ばね9を
与圧部13の弾性的反力によって固定し、組立を完了す
る。組立完了後、モータ特性のテストを行う際に、工具
孔17に工具を差し込んで与圧ばね9を付勢力に抗して
押しながら回転させ、係止部14とストッパ8の段部1
1a、11b、11cとの係止箇所を変えると、ロータ
軸3と与圧部13との接点部分15の与圧が変化する。
つまり、係止箇所を変えることによって、段部11a、
11b、11cのスラスト高さが段階的に低くなる程、
与圧が段階的に増大する。そこで、優れたモータ特性が
得られるように、係止箇所を選定し、与圧を調整する。
Next, the operation of this embodiment will be described. In the final assembly step, the stepped portions 11a, 11b, 1 of the stopper 8 are
The engaging portion 14 is inserted from the cutout 12 into 1c, the pressurizing spring 9 is fixed by the elastic reaction force of the pressurizing portion 13, and the assembly is completed. After the assembly is completed, when the motor characteristic is tested, a tool is inserted into the tool hole 17 and the pressurizing spring 9 is rotated while pressing against the urging force to rotate the engaging portion 14 and the step portion 1 of the stopper 8.
When the locking position with 1a, 11b, 11c is changed, the pressurization of the contact portion 15 between the rotor shaft 3 and the pressurizing portion 13 changes.
That is, by changing the locking position, the stepped portion 11a,
As the thrust heights of 11b and 11c gradually decrease,
Pressurization increases gradually. Therefore, the locking position is selected and the applied pressure is adjusted so that excellent motor characteristics can be obtained.

【0012】このように、与圧ばね9は、その係止部1
4とストッパ8の段部11a、11b、11cとの係止
箇所を変えることにより、ロータ軸3と与圧部13との
接点部分15の与圧を変化させる構造としたので、部品
精度や組立精度のバラツキによる与圧の増減を吸収し、
与圧を適正値に調整することができる。また、与圧を調
整することで、ロストルクを最小値に調整でき、トル
ク、起動電圧、ノイズなどを個々の小型モータ1で調整
することができる。
As described above, the pressurizing spring 9 has the locking portion 1 thereof.
4 and the step portions 11a, 11b, 11c of the stopper 8 are changed to change the pressurization of the contact portion 15 between the rotor shaft 3 and the pressurizing portion 13, so that the accuracy of the parts and the assembly can be improved. Absorbs the increase and decrease of pressurization due to the variation of accuracy,
The pressurization can be adjusted to an appropriate value. Further, by adjusting the pressurization, the loss torque can be adjusted to the minimum value, and the torque, starting voltage, noise, etc. can be adjusted by each small motor 1.

【0013】なお、本発明は、前記実施例に限定される
ものでなく、種々の改変が可能であることはもちろんで
ある。たとえば、前記実施例では、ステップモータ2を
適用した場合について説明したが、これに限らず、ブラ
シレスモータなどの小型モータに適用することもでき
る。また、前記実施例では、円周方向にスラスト方向高
さの相違する段部11a、11b、11cを有するスト
ッパ8の場合について説明したが、これに限らず、前記
段部11a、11b、11cに代えて、円周方向にスラ
スト方向高さが漸次変化するテーパ部を形成し、これに
与圧ばね9の係止部14をセレーションを介して係止さ
せ、与圧を連続的に変化させる可変構造とすることもで
きる。
The present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made. For example, in the above embodiment, the case where the step motor 2 is applied has been described, but the present invention is not limited to this, and the step motor 2 may be applied to a small motor such as a brushless motor. Further, in the above-described embodiment, the case of the stopper 8 having the step portions 11a, 11b, 11c having different thrust heights in the circumferential direction has been described. Instead, a taper portion whose height in the thrust direction gradually changes in the circumferential direction is formed, and the engagement portion 14 of the pressurization spring 9 is engaged with this through a serration to change the pressurization continuously. It can also be a structure.

【0014】[0014]

【発明の効果】以上の説明から明らかなように、本発明
によれば、以下の効果が得られる。すなわち本発明は、
板ばねの一部を切り起こして形成した与圧部を有する与
圧ばねと、この与圧ばねを抜け止めするストッパとを備
え、このストッパは、中心に与圧ばねを収容する孔と、
円周方向にスラスト方向高さの相違する段部とを有し、
上記与圧ばねは、ストッパの段部に係止する係止部を有
し、この係止部とストッパの段部との係止箇所を変える
ことにより、ロータ軸と与圧部との接点部分の与圧を変
化させる構造とした。
As is apparent from the above description, according to the present invention, the following effects can be obtained. That is, the present invention is
A pressurizing spring having a pressurizing portion formed by cutting and raising a part of the leaf spring, and a stopper for preventing the pressurizing spring from coming off, the stopper having a hole for accommodating the pressurizing spring at its center,
Having a step portion having different thrust direction heights in the circumferential direction,
The pressurizing spring has an engaging portion for engaging with the step portion of the stopper, and the contact portion between the rotor shaft and the pressurizing portion is changed by changing the engaging portion between the engaging portion and the step portion of the stopper. The structure is to change the pressurization.

【0015】このため、与圧ばねは、その係止部とスト
ッパの段部との係止箇所を変えることにより、ロータ軸
と与圧部との接点部分の与圧を変化させることができ
る。したがって、部品精度や組立精度のバラツキによる
与圧の増減を吸収し、与圧を適正値に調整することがで
きる。また、与圧を調整することで、ロストルクを最小
値に調整でき、トルク、起動電圧、ノイズなどを個々の
小型モータで調整することができる。
Therefore, the pressurizing spring can change the pressurizing force at the contact portion between the rotor shaft and the pressurizing portion by changing the engaging portion between the engaging portion and the step portion of the stopper. Therefore, it is possible to adjust the pressurization to an appropriate value by absorbing the increase or decrease in the pressurization due to the variation in the parts accuracy or the assembly accuracy. Further, by adjusting the pressurization, the loss torque can be adjusted to the minimum value, and the torque, starting voltage, noise, etc. can be adjusted by each small motor.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例に係る小型モータを一部破断して示す断
面図である。
FIG. 1 is a cross-sectional view showing a small motor according to an embodiment with a part thereof cut away.

【図2】小型モータを示す側面図である。FIG. 2 is a side view showing a small motor.

【図3】小型モータを半部破断して示す分解斜視図であ
る。
FIG. 3 is an exploded perspective view showing a small motor in a partially cutaway manner.

【符号の説明】[Explanation of symbols]

1 小型モータ 2 ステップモータ 3 ロータ軸 4 マグネット 5 ロータ 6 コイル 7 モータケース 8 ストッパ 9 与圧ばね 10 孔 11a 段部 11b 段部 11c 段部 12 切欠口 13 与圧部 14 係止部 15 接点部分 16 板ばね 17 工具孔 1 Small Motor 2 Step Motor 3 Rotor Shaft 4 Magnet 5 Rotor 6 Coil 7 Motor Case 8 Stopper 9 Pressurizing Spring 10 Hole 11a Step 11b Step 11c Step 12 Cutout 13 Pressurization 14 Locking 15 Contact 16 Leaf spring 17 tool hole

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 板ばね(16)の一部を切り起こして形
成した与圧部(13)を有する与圧ばね(9)と、該与
圧ばね(9)を抜け止めするストッパ(8)とを備え、
該ストッパ(8)は、中心に与圧ばね(9)を収容する
孔(10)と、円周方向にスラスト方向高さの相違する
段部(11a、11b、11c)とを有し、上記与圧ば
ね(9)は、ストッパ(8)の段部(11a、11b、
11c)に係止する係止部(14)を有し、この係止部
(14)とストッパ(8)の段部(11a、11b、1
1c)との係止箇所を変えることにより、ロータ軸
(3)と与圧部(13)との接点部分(15)の与圧を
変化させるようにしたことを特徴とする小型モータ
(1)。
1. A pressurizing spring (9) having a pressurizing portion (13) formed by cutting and raising a part of a leaf spring (16), and a stopper (8) for preventing the pressurizing spring (9) from coming off. With and
The stopper (8) has a hole (10) for accommodating the pressurizing spring (9) in the center, and step portions (11a, 11b, 11c) having different thrust-direction heights in the circumferential direction. The pressurizing spring (9) is provided with steps (11a, 11b) of the stopper (8).
11c) has a locking part (14) for locking, and the locking part (14) and the step parts (11a, 11b, 1) of the stopper (8).
The small motor (1) characterized in that the pressurization of the contact portion (15) between the rotor shaft (3) and the pressurizing portion (13) is changed by changing the engagement position with the pressurizing portion 1c). .
JP20000693A 1993-07-19 1993-07-19 Small-sized motor Pending JPH0739102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20000693A JPH0739102A (en) 1993-07-19 1993-07-19 Small-sized motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20000693A JPH0739102A (en) 1993-07-19 1993-07-19 Small-sized motor

Publications (1)

Publication Number Publication Date
JPH0739102A true JPH0739102A (en) 1995-02-07

Family

ID=16417231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20000693A Pending JPH0739102A (en) 1993-07-19 1993-07-19 Small-sized motor

Country Status (1)

Country Link
JP (1) JPH0739102A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871280A1 (en) * 1997-04-07 1998-10-14 Robert Bosch Gmbh Electromotor-worm reduction gear assembly
US6698933B2 (en) * 1999-10-09 2004-03-02 Johnson Electric, S.A. Thrust cap
US7189004B2 (en) 1999-10-09 2007-03-13 Johnson Electric S.A. Thrust cap
CN111365375A (en) * 2018-11-16 2020-07-03 Zf主动安全有限公司 Supporting structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871280A1 (en) * 1997-04-07 1998-10-14 Robert Bosch Gmbh Electromotor-worm reduction gear assembly
US6698933B2 (en) * 1999-10-09 2004-03-02 Johnson Electric, S.A. Thrust cap
US7189004B2 (en) 1999-10-09 2007-03-13 Johnson Electric S.A. Thrust cap
CN111365375A (en) * 2018-11-16 2020-07-03 Zf主动安全有限公司 Supporting structure
CN111365375B (en) * 2018-11-16 2024-04-26 Zf主动安全有限公司 Support structure

Similar Documents

Publication Publication Date Title
JP4481916B2 (en) Chucking device and recording disk drive motor equipped with the chucking device
US20070138881A1 (en) Motor attached with torque transmission member
JPH0739102A (en) Small-sized motor
JP2000232744A (en) Rotor shape and shaft press fit structure for sr motor
JP2000213598A (en) Torque transmitting device
JPH0118906Y2 (en)
JP4354714B2 (en) motor
JPH11270656A (en) Gear noise preventing device
KR100764154B1 (en) Telescopic device of steering column for vehicle
JP3004490U (en) Stepping motor lid member
JP2002087299A (en) Electric power steering device
JP3831187B2 (en) Electric power steering device
JP2999159B2 (en) Power steering device
JP2913366B2 (en) Magnetic disk drive
JP2542379Y2 (en) Stepping motor
US5737149A (en) Floppy Disk drive having a drive lever for driving a disk
JP2001054249A (en) Structure of spindle motor
JP3061234B2 (en) Disk unit
JP2002145085A (en) Electric power steering device
JP2000215571A (en) Rotational drive device for disk
JPH09265703A (en) Disk drive unit
EP0964501B1 (en) Braking device for a motor and motor and apparatus equipped with such a device
JP2579691B2 (en) Stepping motor with rotational vibration prevention device
JP3514239B2 (en) Brushless motor
JPH1098865A (en) Stepping motor and its manufacturing method