JP5336250B2 - Grinder - Google Patents

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Publication number
JP5336250B2
JP5336250B2 JP2009102518A JP2009102518A JP5336250B2 JP 5336250 B2 JP5336250 B2 JP 5336250B2 JP 2009102518 A JP2009102518 A JP 2009102518A JP 2009102518 A JP2009102518 A JP 2009102518A JP 5336250 B2 JP5336250 B2 JP 5336250B2
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Japan
Prior art keywords
gear case
rotation
lower gear
grinder
preventing
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Expired - Fee Related
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JP2009102518A
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JP2010253564A (en
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裕暁 佐々木
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Ryobi Ltd
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Ryobi Ltd
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Description

本発明はグラインダに関し、特にグラインダの下ギアケースの回り止めに関するものである。   The present invention relates to a grinder, and more particularly to a rotation stop of a lower gear case of a grinder.

図５は従来のグラインダ１００であるが、円盤砥石９を装着するスピンドル４に回転力を伝達するベベルギア等で構成されるギア部は上下のギアケース２００、３００で形成される空間に収められており、上下のギアケース２００、３００は螺着される構成となっていた。そして、下ギアケース３００の回り止めのために、ボルト８で下ギアケース３００を上ギアケース２００に締め付けて止めていた。このような例は、特許文献１の図７にも見られる。   FIG. 5 shows a conventional grinder 100, but a gear portion composed of a bevel gear or the like that transmits rotational force to the spindle 4 on which the disc grindstone 9 is mounted is housed in a space formed by upper and lower gear cases 200 and 300. The upper and lower gear cases 200, 300 are screwed. In order to prevent the lower gear case 300 from rotating, the lower gear case 300 is fastened to the upper gear case 200 with the bolts 8 and stopped. Such an example can also be seen in FIG.

特開２００６−１８１６６７号公報JP 2006-181667 A

しかし、従来の止め方では下ギアケース３００の回転を阻止する効果は少なく、下ギアケース３００には砥石カバー１０が固着されているので、砥石カバー１０に物が当たると下ギアケース３００が回転して緩む恐れがあった。   However, the conventional stopping method has little effect of preventing the rotation of the lower gear case 300, and since the grindstone cover 10 is fixed to the lower gear case 300, the lower gear case 300 rotates when an object hits the grindstone cover 10. Then there was a risk of loosening.

本発明は、上記問題を解決するものであり、簡単な構成で砥石カバーに物が当たっても下ギアケースの回転を強力に阻止する手段を提供するものである。   The present invention solves the above problems and provides means for strongly preventing rotation of the lower gear case even when an object hits the grindstone cover with a simple configuration.

上記目的を達成するために、上ギアケースに凹部を形成し、それに対向する下ギアケースの位置に凹部を形成し、２つの凹部の間に回り止め部材を配置した構成とした。さらに、回り止め部材のリブが上ギアケースの突出部に当接する構成とした。
In order to achieve the above object, a recess is formed in the upper gear case, a recess is formed at the position of the lower gear case facing the upper gear case, and a detent member is disposed between the two recesses. Further , the rib of the rotation preventing member is in contact with the protruding portion of the upper gear case.

本発明によれば、上下のギアケースの向かい合った凹部に回り止め部材が配置されているので、上ギアケースに対して下ギアケースが回転しようとすると、回り止め部材がくさびのように働いて下ギアケースの回転を阻止する効果がある。さらに、回り止め部材のリブが上ギアケースの突出部に当接して、下ギアケースの回転にともなう回り止め部材の移動を阻止する効果がある。
According to the present invention, the anti-rotation member is arranged in the concave portions facing each other of the upper and lower gear cases. Therefore, when the lower gear case tries to rotate with respect to the upper gear case, the anti-rotation member works like a wedge. This has the effect of preventing the lower gear case from rotating. Furthermore , the rib of the anti-rotation member abuts against the protruding portion of the upper gear case, and there is an effect of preventing the movement of the anti-rotation member along with the rotation of the lower gear case.

本発明にかかるグラインダの要部断面図である。It is principal part sectional drawing of the grinder concerning this invention. 図１におけるＹ矢視図である。It is a Y arrow line view in FIG. 回り止め部材の平面図である。It is a top view of a rotation stopping member. 図２におけるＸ矢視断面図である。FIG. 3 is a cross-sectional view taken along arrow X in FIG. 従来のグラインダの要部断面図である。It is principal part sectional drawing of the conventional grinder.

以下、本発明を実施するための好適な実施形態について、図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings.

図１は本発明にかかるグラインダ１の要部の断面図で、分かりやすいように上ギアケース２と下ギアケース３の断面は斜線で示し、図５と同一の部品には同一の番号を付している。上ギアケース２の下端の内面と下ギアケース３の上端の外面にはネジが切ってあり、上ギアケース２に下ギアケース３をねじ込むことによって両者は結合し、ギアハウジングが形成される。ギアハウジング内には、モーターＭの出力軸５が突入しており、出力軸５の先端に固着されたべベルギアとスピンドル４に固着されたベベルギアとがかみ合ってスピンドル４へ回転を伝えている。４ａ、４ｂはスピンドル４を軸支するベアリングである。スピンドル４は下ギアケース３に形成された孔３ｂを貫通して下に突出し、その先端に円盤砥石９を装着する取り付け部６を備えている。１０は安全のために円盤砥石９をカバーする砥石カバーであって、下ギアケース３の下部に強く固着されている。   FIG. 1 is a cross-sectional view of a main part of a grinder 1 according to the present invention. For easy understanding, the cross sections of an upper gear case 2 and a lower gear case 3 are shown by oblique lines, and the same parts as those in FIG. doing. Screws are formed on the inner surface of the lower end of the upper gear case 2 and the outer surface of the upper end of the lower gear case 3, and when the lower gear case 3 is screwed into the upper gear case 2, they are coupled to form a gear housing. The output shaft 5 of the motor M enters the gear housing, and the bevel gear fixed to the tip of the output shaft 5 and the bevel gear fixed to the spindle 4 mesh with each other to transmit the rotation to the spindle 4. Reference numerals 4 a and 4 b denote bearings for supporting the spindle 4. The spindle 4 protrudes downward through a hole 3b formed in the lower gear case 3, and is provided with a mounting portion 6 for mounting a disc grindstone 9 at the tip thereof. Reference numeral 10 denotes a grindstone cover that covers the disc grindstone 9 for safety, and is firmly fixed to the lower portion of the lower gear case 3.

図２は、図１において円盤砥石９および砥石カバー１０を取り去って矢印Ｙ方向に見たものである。２ｂは、上ギアケース２の下端に形成されている壁状の端部であり、図示上下方向の略中央に凹部２ａが形成されている。３ａは、下ギアケース３に設けられた凹部であり、凹部２ａと凹部３ａが互いに向き合うよう、上ギアケース２に下ギアケース３を螺着後、ドリル加工により形成する。７は回り止め部材であり、８は回り止め部材７の抜け止め用のボルトである。図３に示すように、回り止め部材７の中央部は略円形であり、中心にはボルト８が貫通する孔７ａが形成されている。また、回り止め部材７の両サイドには角状のリブ７ｂ、７ｂが形成されている。図２に示すように、回り止め部材７がボルト８により固定された際、回り止め部材７の略円形の中央部は凹部２ａ、３ａとの間にわずかなすき間を有しているが、このすき間は無くてもよい。図４は図２におけるＸ矢視断面図であり、上ギアケース２に設けられた２つの凹部２ｃ、２ｃの間で少し下方へ突出した突出部２ｄにボルト８で回り止め部材７が係止されており、回り止め部材７のリブ７ｂ、７ｂは突出部２ｄを両側からはさむように構成されている。   FIG. 2 is a view of the disk grindstone 9 and the grindstone cover 10 in FIG. Reference numeral 2b denotes a wall-like end portion formed at the lower end of the upper gear case 2, and a recess 2a is formed at substantially the center in the vertical direction in the figure. 3a is a recess provided in the lower gear case 3, and is formed by drilling after the lower gear case 3 is screwed to the upper gear case 2 so that the recess 2a and the recess 3a face each other. 7 is a rotation prevention member, and 8 is a bolt for preventing the rotation prevention member 7 from coming off. As shown in FIG. 3, the center portion of the rotation preventing member 7 is substantially circular, and a hole 7a through which the bolt 8 passes is formed at the center. Further, square ribs 7 b and 7 b are formed on both sides of the rotation preventing member 7. As shown in FIG. 2, when the anti-rotation member 7 is fixed by the bolt 8, the substantially circular central portion of the anti-rotation member 7 has a slight gap between the recesses 2a and 3a. There may be no gap. 4 is a cross-sectional view taken in the direction of the arrow X in FIG. 2, and a locking member 7 is locked by a bolt 8 to a protruding portion 2d that protrudes slightly downward between two concave portions 2c, 2c provided in the upper gear case 2. FIG. The ribs 7b and 7b of the anti-rotation member 7 are configured to sandwich the protruding portion 2d from both sides.

以上の如く構成されたグラインダ１において、上ギアケース２の凹部２ａと下ギアケース３の凹部３ａが対向し、これら凹部２ａ、３ａ間に回り止め部材７が配置されているので、砥石カバー１０に物が当たって下ギアケースに強い回転力が働いても、回り止め部材７がくさびのような働きを発揮し、回転を阻止する。   In the grinder 1 configured as described above, the concave portion 2a of the upper gear case 2 and the concave portion 3a of the lower gear case 3 face each other, and the anti-rotation member 7 is disposed between the concave portions 2a and 3a. Even if the object hits the wheel and a strong rotational force acts on the lower gear case, the rotation preventing member 7 acts like a wedge and prevents the rotation.

下ギアケース３に強い回転力が働いた場合、回り止め部材７をＺ方向（図２、図４参照）へ移動しようとするが、リブ７ｂが上ギアケース２に形成されている突出部２ｄに当接し、その移動を阻止する。   When a strong rotational force is applied to the lower gear case 3, the rotation preventing member 7 tries to move in the Z direction (see FIGS. 2 and 4), but the protruding portion 2 d in which the rib 7 b is formed on the upper gear case 2. To prevent the movement.

本発明に係るグラインダ１は、上述した実施の形態に限定されず、特許請求の範囲で記載した範囲で種々の変形や改良が可能である。   The grinder 1 according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims.

この発明は、グラインダ等の研削機について有用である。   The present invention is useful for a grinder such as a grinder.

１ グラインダ
２ 上ギアケース
３ 下ギアケース
４ スピンドル
５ 出力軸
７ 回り止め部材
９ 円盤砥石
１０ 砥石カバー DESCRIPTION OF SYMBOLS 1 Grinder 2 Upper gear case 3 Lower gear case 4 Spindle 5 Output shaft 7 Non-rotating member 9 Disc grindstone 10 Grindstone cover

Claims (1)

上ギアケースと、該上ギアケースに螺着される下ギアケースとからなるギアハウジングと、該ギアハウジングに収容されたギア部により回転されるスピンドルと、該スピンドルに装着される円盤砥石とを有するグラインダにおいて、該上ギアケースの凹部とそれに対向する該下ギアケースの凹部との間には回り止め部材が配置されており、該回り止め部材は、該上ギアケースの突出部に当接して該下ギアケースの回転にともなう該回り止め部材の移動を阻止するリブを有していることを特徴とするグラインダ。 A gear housing comprising an upper gear case, a lower gear case screwed to the upper gear case, a spindle rotated by a gear portion accommodated in the gear housing, and a disc grindstone attached to the spindle in grinder with, there is disposed a detent member is provided between the recess and the recess of the lower gear case opposite to that of the upper gear case,該回Ri stop member is in contact with the projecting portion of the upper gear case And a rib for preventing the rotation-preventing member from moving along with the rotation of the lower gear case .
JP2009102518A 2009-04-21 2009-04-21 Grinder Expired - Fee Related JP5336250B2 (en)

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JP5336250B2 true JP5336250B2 (en) 2013-11-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101254856B1 (en) * 2010-11-19 2013-04-15 권정섭 Safety cover for electric hand grinder
JP2021000701A (en) * 2019-06-21 2021-01-07 工機ホールディングス株式会社 Power tool

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60153780U (en) * 1984-03-23 1985-10-14 日立工機株式会社 Auxiliary handle fixing mechanism for power tools
JPH07642U (en) * 1993-06-04 1995-01-06 日立工機株式会社 Rotary grinding tool
JP2005066804A (en) * 2003-08-27 2005-03-17 Ryobi Ltd Power tool
JP4731162B2 (en) * 2004-12-27 2011-07-20 株式会社マキタ Electric tool
JP3131362U (en) * 2007-01-19 2007-05-10 栄一 武田 Loosening prevention pin

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