JP2018153876A - Electric tool - Google Patents

Electric tool Download PDF

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Publication number
JP2018153876A
JP2018153876A JP2017050309A JP2017050309A JP2018153876A JP 2018153876 A JP2018153876 A JP 2018153876A JP 2017050309 A JP2017050309 A JP 2017050309A JP 2017050309 A JP2017050309 A JP 2017050309A JP 2018153876 A JP2018153876 A JP 2018153876A
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Prior art keywords
guide rod
main body
coil spring
opening
rotating shaft
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JP2017050309A
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JP7001953B2 (en
Inventor
雅巳 中根
Masami Nakane
雅巳 中根
雅道 中村
Masamichi Nakamura
雅道 中村
関野　文昭
Fumiaki Sekino
文昭 関野
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to JP2017050309A priority Critical patent/JP7001953B2/en
Priority to EP18157794.1A priority patent/EP3375573B1/en
Publication of JP2018153876A publication Critical patent/JP2018153876A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Portable Power Tools In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an electric tool which enables a body part and a holding part of the tool to be stably connected to each other.SOLUTION: A holding part 3 is connected to the rear side of a body part 2 by a first connection part 5 and a second connection part. The first connection part 5 rotatably connects the body part 2 with the holding part 3. The second connection part has: a coil spring 12 provided between the body part 2 and the holding part 3; and a guide rod 13 which maintains a direction of a load applied to the coil spring 12 to an axial direction of the coil spring 12. The guide rod 13 has: a first opening into which a first rotary shaft 10 at the body part 2 side is inserted; and a second opening 13b into which a second rotary shaft 11 at the holding part 3 side is inserted. The second opening 13b has a shape such that the second rotary shaft 11 can slide in a longitudinal direction of the guide rod 13.SELECTED DRAWING: Figure 5

Description

本発明は、作業者が把持するための把持部を本体部の後方側に備えた電動工具に関する。   The present invention relates to an electric tool provided with a grip portion for a worker to grip on the rear side of a main body portion.

本体部の後方側に把持部を備えた電動工具として、モータの回転出力を先端工具に伝達する打撃機構および回転機構を備えたハンマドリルが知られている。ハンマドリルはコンクリート等の穿孔、切削作業等に使用され、本体部には大きな振動や衝撃が発生することから、本体部と把持部の間に防振構造を設けて、作業者にかかる負担を軽減することが提案されている。   2. Description of the Related Art As an electric tool having a grip portion on the rear side of a main body portion, a hammer drill having a striking mechanism and a rotation mechanism for transmitting a rotation output of a motor to a tip tool is known. Hammer drills are used for drilling and cutting concrete, etc., and the main body generates large vibrations and shocks. Therefore, a vibration-proof structure is provided between the main body and the gripping part to reduce the burden on the operator. It has been proposed to do.

特許文献１は、作業工具本体と、作業工具本体の長軸方向と交差する方向に延在するグリップ本体部と、作業本体工具の後端下部に設けた回動軸に回動自在に支持される下側連結部と、コイルバネを介して作業工具本体の後端上部に連接される上側連結部とを有する手持式作業工具を開示する。コイルバネの両端は、それぞれ作業工具本体と上側連結部に固定されている。   Patent Document 1 is rotatably supported by a work tool main body, a grip main body extending in a direction crossing the long axis direction of the work tool main body, and a rotation shaft provided at a lower end of the rear end of the work main body tool. A hand-held work tool having a lower connection part and an upper connection part connected to the rear end upper part of the work tool main body via a coil spring is disclosed. Both ends of the coil spring are fixed to the work tool main body and the upper connecting portion, respectively.

特開２０１０−５６７号公報JP 2010-567 A

特許文献１に開示された防振構造によると、上側連結部が回動軸を回動支点として作業工具本体に対して回動運動するため、両端を作業工具本体と上側連結部に固定されているコイルバネには回動方向の荷重が加えられる。コイルバネが軸線方向に対して斜めから荷重を受けることは、伸縮量によるバネ定数の変化によりリニアな振動吸収作用を得られにくくするとともに、コイルバネの寿命を短くする要因となる。   According to the vibration isolating structure disclosed in Patent Document 1, the upper connecting portion rotates with respect to the work tool main body with the rotation shaft as a rotation fulcrum, so both ends are fixed to the work tool main body and the upper connecting portion. A load in the rotational direction is applied to the coil spring. The fact that the coil spring receives a load obliquely with respect to the axial direction makes it difficult to obtain a linear vibration absorbing action due to a change in the spring constant due to the amount of expansion and contraction, and shortens the life of the coil spring.

本発明はこうした状況に鑑みなされたものであり、その目的は、好適な防振構造を備えた電動工具を提供することにある。   This invention is made | formed in view of such a condition, The objective is to provide the electric tool provided with the suitable anti-vibration structure.

上記課題を解決するために、本発明のある態様の電動工具は、モータ、およびモータの回転出力を先端工具に伝達する運動伝達機構とを収容する本体部と、本体部の後方側に第１連結部および第２連結部により連結された把持部とを備える。第１連結部は、本体部と把持部とを回動自在に連結し、第２連結部は、本体部と把持部の間に設けられる弾性体と、弾性体にかかる荷重方向を弾性体の軸線方向に維持するガイドロッドとを有する。   In order to solve the above-described problems, an electric tool according to an aspect of the present invention includes a main body that houses a motor and a motion transmission mechanism that transmits a rotation output of the motor to a tip tool, and a first on the rear side of the main body. And a grip portion connected by the connection portion and the second connection portion. The first connecting part rotatably connects the main body part and the gripping part, and the second connecting part has an elastic body provided between the main body part and the gripping part and a load direction applied to the elastic body. And a guide rod maintained in the axial direction.

本発明によれば、好適な防振構造を備えた電動工具を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the electric tool provided with the suitable vibration-proof structure can be provided.

本発明の実施形態に係る電動工具１の外観構成を示す図である。It is a figure which shows the external appearance structure of the electric tool 1 which concerns on embodiment of this invention. 第２連結部の構造の一例を示す図である。It is a figure which shows an example of the structure of a 2nd connection part. ガイドロッドの構成の一例を示す図である。It is a figure which shows an example of a structure of a guide rod. バネ受け部の構成の一例を示す図である。It is a figure which shows an example of a structure of a spring receiving part. 実施形態の防振構造の作用を説明するための図である。It is a figure for demonstrating the effect | action of the vibration proof structure of embodiment. 実施形態の防振構造の作用を説明するための図である。It is a figure for demonstrating the effect | action of the vibration proof structure of embodiment. 第１連結部の構造の一例を示す図である。It is a figure which shows an example of the structure of a 1st connection part.

図１は、本発明の実施形態に係る電動工具１の外観構成を示す。電動工具１は、本体部２と、作業者が把持するための把持部３を備える。電動工具１は、着脱式のバッテリパック４に内蔵された二次電池から電力を供給される。実施形態では電動工具１の例として把持部３が本体部２の後端側に連結されるハンマドリルを示すが、電動工具１は、はつり機などの他の作業工具であってもよい。図１において先端工具９が装着された左側を工具前側、把持部３が設けられた右側を工具後側として、工具前後方向を定義する。   FIG. 1 shows an external configuration of a power tool 1 according to an embodiment of the present invention. The electric tool 1 includes a main body 2 and a grip 3 for a worker to grip. The power tool 1 is supplied with electric power from a secondary battery built in a detachable battery pack 4. In the embodiment, a hammer drill in which the grip portion 3 is connected to the rear end side of the main body portion 2 is shown as an example of the electric tool 1, but the electric tool 1 may be another work tool such as a lifting machine. In FIG. 1, the longitudinal direction of the tool is defined with the left side with the tip tool 9 attached as the front side of the tool and the right side with the grip portion 3 as the rear side of the tool.

本体部２は、モータ、およびモータの回転出力を先端工具９に伝達する運動伝達機構とを少なくとも収容する筐体を備える。運動伝達機構は、減速機構により減速されたモータ回転出力を往復運動に変換して先端工具９に打撃運動を伝達する打撃機構と、減速機構により減速されたモータ回転出力を先端工具９に伝達する回転機構とを備える。把持部３にはトリガスイッチ８が設けられ、作業者がトリガスイッチ８を引き操作すると、モータが二次電池から電力供給を受けて回転し、運動伝達機構がモータ回転出力を先端工具９に伝達する。   The main body 2 includes a housing that houses at least a motor and a motion transmission mechanism that transmits the rotation output of the motor to the tip tool 9. The motion transmission mechanism converts the motor rotation output decelerated by the speed reduction mechanism into a reciprocating motion and transmits the striking motion to the tip tool 9, and transmits the motor rotation output decelerated by the speed reduction mechanism to the tip tool 9. A rotation mechanism. The grip portion 3 is provided with a trigger switch 8. When an operator pulls the trigger switch 8, the motor rotates by receiving power from the secondary battery, and the motion transmission mechanism transmits the motor rotation output to the tip tool 9. To do.

把持部３は、先端工具９の軸線方向に略直交して延在するハンドル３ａと、ハンドル３ａの下端側から軸線方向に略平行に延出する下側延出部３ｂと、ハンドル３ａの上端側から軸線方向に略平行に延出する上側延出部３ｃとを有する。電動工具１において、本体部２と把持部３とは別部品として構成され、把持部３は、本体部２の後方側に第１連結部５および第２連結部７により連結される。なお第２連結部７の外側には伸縮可能な保護用カバー６が設けられ、第２連結部７が外部に露出しないように保護されている。第１連結部５および第２連結部７は、電動工具１における防振構造を構成する。   The grip portion 3 includes a handle 3a extending substantially orthogonal to the axial direction of the tip tool 9, a lower extending portion 3b extending substantially parallel to the axial direction from the lower end side of the handle 3a, and an upper end of the handle 3a. And an upper extension portion 3c extending substantially parallel to the axial direction from the side. In the electric power tool 1, the main body portion 2 and the grip portion 3 are configured as separate components, and the grip portion 3 is connected to the rear side of the main body portion 2 by the first connecting portion 5 and the second connecting portion 7. In addition, the protective cover 6 which can be expanded-contracted is provided in the outer side of the 2nd connection part 7, and it protects so that the 2nd connection part 7 may not be exposed outside. The first connecting part 5 and the second connecting part 7 constitute a vibration isolation structure in the electric power tool 1.

第１連結部５は、本体部２と把持部３とを回動自在に連結する。第１連結部５は、下側延出部３ｂの前端部と本体部２の筐体後側下部とを回動自在に連結するねじ部材を有してよい。第１連結部５は、電動工具１の左右側部のそれぞれに設けられる。   The 1st connection part 5 connects the main-body part 2 and the holding part 3 so that rotation is possible. The 1st connection part 5 may have a screw member which connects the front-end part of the lower side extension part 3b, and the housing | casing rear side lower part of the main-body part 2 so that rotation is possible. The first connecting portion 5 is provided on each of the left and right side portions of the electric tool 1.

図２は、第２連結部７の構造の一例を示す。第２連結部７は、本体部２と把持部３の間に設けられる弾性体であるコイルバネ１２と、コイルバネ１２にかかる荷重方向をコイルバネ１２の軸線方向に維持するガイドロッド１３とを備える。第２連結部７において、コイルバネ１２はガイドロッド１３の動きに連動するように本体部２と把持部３の間に設けられ、ガイドロッド１３は、コイルバネ１２の軸線方向を、ガイドロッド１３の長手方向に一致させる役割をもつ。   FIG. 2 shows an example of the structure of the second connecting portion 7. The second connecting portion 7 includes a coil spring 12 that is an elastic body provided between the main body portion 2 and the grip portion 3, and a guide rod 13 that maintains the load direction applied to the coil spring 12 in the axial direction of the coil spring 12. In the second connecting portion 7, the coil spring 12 is provided between the main body portion 2 and the grip portion 3 so as to be interlocked with the movement of the guide rod 13, and the guide rod 13 extends in the axial direction of the coil spring 12. Has the role of matching the direction.

図３は、ガイドロッド１３の構成の一例を示す。ガイドロッド１３は樹脂材料で形成された棒状部材であり、一端側に第１開口１３ａを有し、他端側に第２開口１３ｂを有する。第２開口１３ｂは、ガイドロッド１３の長手方向に延びる貫通長穴であり、矩形領域と、矩形領域の両端側を半円形領域とする断面を有する。第１開口１３ａは、円形断面を有する貫通穴として形成される。   FIG. 3 shows an example of the configuration of the guide rod 13. The guide rod 13 is a rod-shaped member made of a resin material, and has a first opening 13a on one end side and a second opening 13b on the other end side. The second opening 13b is a through hole that extends in the longitudinal direction of the guide rod 13, and has a rectangular area and a cross section in which both end sides of the rectangular area are semicircular areas. The first opening 13a is formed as a through hole having a circular cross section.

図２に戻り、本体部２の後側上部に、左右方向に延びる円筒状の第１回転軸１０が設けられ、上側延出部３ｃの前端側に、左右方向に延びる円筒状の第２回転軸１１が設けられる。第１回転軸１０がガイドロッド１３の第１開口１３ａに挿入され、第２回転軸１１がガイドロッド１３の第２開口１３ｂに挿入されることで、本体部２および把持部３が、ガイドロッド１３により相対回転可能に連結される。第２開口１３ｂは、第２回転軸１１がガイドロッド１３の長手方向に摺動自在な形状を有し、図３に示したように貫通長穴として形成される。   Returning to FIG. 2, a cylindrical first rotating shaft 10 extending in the left-right direction is provided on the upper rear side of the main body 2, and a second cylindrical rotation extending in the left-right direction is provided on the front end side of the upper extension 3 c. A shaft 11 is provided. The first rotating shaft 10 is inserted into the first opening 13 a of the guide rod 13 and the second rotating shaft 11 is inserted into the second opening 13 b of the guide rod 13, so that the main body 2 and the grip 3 are connected to the guide rod. 13 are connected so as to be relatively rotatable. The second opening 13b has a shape in which the second rotating shaft 11 is slidable in the longitudinal direction of the guide rod 13, and is formed as a through-hole as shown in FIG.

実施形態では、ガイドロッド１３がコイルバネ１２の内側に内挿されて、コイルバネ１２の軸線に配置される。これにより第２連結部７をコンパクトに構成できる。ガイドロッド１３には、２つの第１バネ受け部１４ａおよび第２バネ受け部１４ｂが設けられ、コイルバネ１２は、第１バネ受け部１４ａおよび第２バネ受け部１４ｂにより支持される。第１バネ受け部１４ａおよび第２バネ受け部１４ｂは同一形状を有し、以下、特に区別しない場合には、「バネ受け部１４」と呼ぶ。   In the embodiment, the guide rod 13 is inserted inside the coil spring 12 and disposed on the axis of the coil spring 12. Thereby, the 2nd connection part 7 can be comprised compactly. The guide rod 13 is provided with two first spring receiving portions 14a and second spring receiving portions 14b, and the coil spring 12 is supported by the first spring receiving portion 14a and the second spring receiving portion 14b. The first spring receiving portion 14a and the second spring receiving portion 14b have the same shape, and are hereinafter referred to as “spring receiving portions 14” unless otherwise distinguished.

図４は、バネ受け部１４の構成の一例を示す。バネ受け部１４は、コイルバネ１２の端部が当接するバネ受け面１５ａと、ガイドロッド１３が挿通される挿通穴１５ｂと、バネ受け面１５ａの外周から起立してバネ端部の横ずれを防止する環状起立部１５ｃとを有する。   FIG. 4 shows an example of the configuration of the spring receiving portion 14. The spring receiving portion 14 stands up from the outer periphery of the spring receiving surface 15a, the spring receiving surface 15a with which the end of the coil spring 12 abuts, the insertion hole 15b through which the guide rod 13 is inserted, and prevents the spring end from being laterally displaced. And an annular upright portion 15c.

図２に戻り、第１バネ受け部１４ａは、コイルバネ１２により第１回転軸１０に押し付けられて当接し、第２バネ受け部１４ｂは、コイルバネ１２により第２回転軸１１に押し付けられて当接する。ガイドロッド１３に配置した第１バネ受け部１４ａおよび第２バネ受け部１４ｂによってコイルバネ１２の両端を受けることで、本体部２の振動や衝撃に対し、コイルバネ１２はガイドロッド１３と一体となって動くことになる。   Returning to FIG. 2, the first spring receiving portion 14 a is pressed against and contacts the first rotating shaft 10 by the coil spring 12, and the second spring receiving portion 14 b is pressed against and contacted with the second rotating shaft 11 by the coil spring 12. . By receiving both ends of the coil spring 12 by the first spring receiving portion 14 a and the second spring receiving portion 14 b arranged on the guide rod 13, the coil spring 12 is integrated with the guide rod 13 against vibration and impact of the main body portion 2. It will move.

図５および図６は、実施形態の防振構造の作用を説明するための図である。図５に示すように、作業中に本体部２に振動や衝撃が発生すると、防振構造により把持部３は、第１連結部５を回転支点として矢印Ａで示す方向に回転する。ガイドロッド１３は、第２開口１３ｂにおいて第２回転軸１１を摺動させることで、把持部３の回転運動を矢印Ｂで示す方向、つまりガイドロッド１３の長手方向の直線運動に変換する。   5 and 6 are diagrams for explaining the operation of the vibration isolation structure of the embodiment. As shown in FIG. 5, when vibration or impact occurs in the main body 2 during work, the gripping portion 3 rotates in the direction indicated by the arrow A with the first coupling portion 5 as a rotation fulcrum due to the anti-vibration structure. The guide rod 13 converts the rotational movement of the grip portion 3 into the direction indicated by the arrow B, that is, the linear movement in the longitudinal direction of the guide rod 13 by sliding the second rotation shaft 11 in the second opening 13b.

図６は、把持部３が本体部２に対して回転することで相対的に近づいた状態を示す。把持部３が本体部２に相対的に近づく過程で、コイルバネ１２による振動吸収が行われる。図６には、第２回転軸１１が第２開口１３ｂ内を移動し、コイルバネ１２が圧縮された様子が示されている。ガイドロッド１３は、把持部３の回転運動を、常に矢印Ｂで示す方向の直線運動の変換する。そのためガイドロッド１３に連動するコイルバネ１２にかかる荷重方向は、矢印Ｂの方向、つまりコイルバネ１２の軸線方向に維持される。   FIG. 6 shows a state in which the grip portion 3 is relatively approached by rotating with respect to the main body portion 2. In the process in which the grip portion 3 is relatively close to the main body portion 2, vibration absorption by the coil spring 12 is performed. FIG. 6 shows a state in which the second rotating shaft 11 has moved in the second opening 13b and the coil spring 12 has been compressed. The guide rod 13 always converts the rotational motion of the grip portion 3 into a linear motion in the direction indicated by the arrow B. Therefore, the load direction applied to the coil spring 12 interlocked with the guide rod 13 is maintained in the direction of arrow B, that is, the axial direction of the coil spring 12.

実施形態によると、コイルバネ１２が軸線方向の荷重を受けて圧縮、伸張することで、圧縮、伸張の過程でバネ定数は一定に保たれるため、リニアな振動吸収作用を得られる防振構造を実現できる。またコイルバネ１２が軸線方向に対して斜めから荷重を受けないことで、コイルバネ１２のバネ特性を劣化させることなく、バネ寿命を長くできる。特に電動工具１を小型化して、第１連結部５と第２連結部７との間隔が短くなる場合、実施形態の防振構造は、以上の効果をより一層顕著に奏することになる。   According to the embodiment, the coil spring 12 receives a load in the axial direction and compresses and expands so that the spring constant is kept constant in the process of compression and extension. realizable. Further, since the coil spring 12 does not receive a load obliquely with respect to the axial direction, the spring life can be extended without deteriorating the spring characteristics of the coil spring 12. In particular, when the power tool 1 is downsized and the distance between the first connecting portion 5 and the second connecting portion 7 is shortened, the vibration isolating structure according to the embodiment exhibits the above effects more remarkably.

図７は、第１連結部５の構造の一例を示す。第１連結部５において、本体部２の筐体後側下部にはねじ溝が切られており、ねじ部材１８が、下側延出部３ｂの貫通孔に配置されたスペーサ１７に挿通されて、本体部２に締結される。これにより下側延出部３ｂが、本体部２に対して回転自在に支持される。スペーサ１７は弾性材料で形成されてよい。スペーサ１７に弾性をもたせることで、第１連結部５に振動吸収機能をもたせることが可能となる。   FIG. 7 shows an example of the structure of the first connecting portion 5. In the 1st connection part 5, the thread groove is cut in the housing | casing rear side lower part of the main-body part 2, and the screw member 18 is penetrated by the spacer 17 arrange | positioned at the through-hole of the lower side extension part 3b. The main body 2 is fastened. Thereby, the lower extension part 3b is rotatably supported with respect to the main body part 2. The spacer 17 may be formed of an elastic material. By giving the spacer 17 elasticity, the first connecting portion 5 can have a vibration absorbing function.

以上、本発明を実施形態をもとに説明した。この実施形態は例示であり、それらの各構成要素あるいは各処理プロセスの組合せにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。   The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to each component or combination of each processing process, and such modifications are within the scope of the present invention. .

実施形態では、ガイドロッド１３がコイルバネ１２に内挿されて、ガイドロッド１３とコイルバネ１２とを一体に構成した第２連結部７を示した。変形例では、ガイドロッド１３がコイルバネ１２にかかる荷重方向をコイルバネ１２の軸線方向に維持することを条件として、ガイドロッド１３とコイルバネ１２とが、別個に配置されてもよい。この場合、ガイドロッド１３を複数設けてもよく、またコイルバネ１２を複数設けてもよい。なおコイルバネ１２を複数設ける場合には、コイルバネ１２は左右方向に並設されることが好ましい。   In the embodiment, the second connecting portion 7 in which the guide rod 13 is inserted into the coil spring 12 and the guide rod 13 and the coil spring 12 are integrally formed is shown. In the modification, the guide rod 13 and the coil spring 12 may be separately arranged on condition that the load direction applied to the coil spring 12 by the guide rod 13 is maintained in the axial direction of the coil spring 12. In this case, a plurality of guide rods 13 may be provided, and a plurality of coil springs 12 may be provided. In addition, when providing the coil spring 12 with two or more, it is preferable that the coil spring 12 is arranged in parallel in the left-right direction.

また実施形態では第１回転軸１０がガイドロッド１３の第１開口１３ａに挿入され、第２回転軸１１がガイドロッド１３の第２開口１３ｂに挿入されているが、第１開口１３ａに第２回転軸１１が挿入され、第２開口１３ｂに第１回転軸１０が挿入されてもよい。また実施形態では第２開口１３ｂを貫通長穴として形成したが、第１開口１３ａおよび第２開口１３ｂの双方を貫通長穴として形成してもよい。またコイルバネ１２を弾性体の例として示したが、弾性体として、コイルバネ１２とは別のバネを用いてもよく、また樹脂材料で形成したゴム体を用いてもよい。   In the embodiment, the first rotating shaft 10 is inserted into the first opening 13 a of the guide rod 13 and the second rotating shaft 11 is inserted into the second opening 13 b of the guide rod 13. The rotating shaft 11 may be inserted, and the first rotating shaft 10 may be inserted into the second opening 13b. In the embodiment, the second opening 13b is formed as a through hole, but both the first opening 13a and the second opening 13b may be formed as a through hole. Although the coil spring 12 is shown as an example of an elastic body, a spring different from the coil spring 12 may be used as the elastic body, or a rubber body formed of a resin material may be used.

本発明の一態様の概要は、次の通りである。
本発明のある態様の電動工具（１）は、モータ、およびモータの回転出力を先端工具（９）に伝達する運動伝達機構とを収容する本体部（２）と、本体部の後方側に第１連結部（５）および第２連結部（７）により連結された把持部（３）とを備える。第１連結部（５）は、本体部（２）と把持部（３）とを回動自在に連結し、第２連結部（７）は、本体部（２）と把持部（３）の間に設けられる弾性体（１２）と、弾性体にかかる荷重方向を弾性体の軸線方向に維持するガイドロッド（１３）とを有する。 The outline of one embodiment of the present invention is as follows.
An electric power tool (1) according to an aspect of the present invention includes a main body (2) that houses a motor and a motion transmission mechanism that transmits a rotation output of the motor to a tip tool (9), and a rear side of the main body. The grip part (3) connected by the 1 connection part (5) and the 2nd connection part (7) is provided. A 1st connection part (5) connects a main-body part (2) and a holding part (3) so that rotation is possible, and a 2nd connection part (7) is a main-body part (2) and a holding part (3). It has an elastic body (12) provided therebetween, and a guide rod (13) that maintains the load direction applied to the elastic body in the axial direction of the elastic body.

ガイドロッド（１３）は、本体部側の第１回転軸（１０）が挿入される第１開口（１３ａ）と把持部側の第２回転軸（１１）が挿入される第２開口（１３ｂ）とを有し、第１開口または第２開口は、第１回転軸または第２回転軸がガイドロッドの長手方向に摺動自在な形状を有してよい。第１開口（１３ａ）または第２開口（１３ｂ）は、ガイドロッドの長手方向に延びる長穴の形状を有してよい。   The guide rod (13) includes a first opening (13a) into which the first rotating shaft (10) on the main body side is inserted and a second opening (13b) into which the second rotating shaft (11) on the gripping side is inserted. The first opening or the second opening may have a shape in which the first rotating shaft or the second rotating shaft is slidable in the longitudinal direction of the guide rod. The first opening (13a) or the second opening (13b) may have a shape of a long hole extending in the longitudinal direction of the guide rod.

弾性体はコイルバネ（１２）であって、ガイドロッド（１３）は、コイルバネ（１２）に内挿されてもよい。ガイドロッド（１３）には、コイルバネ（１２）の両端を受ける一対のバネ受け部（１４ａ，１４ｂ）が配置されてよく、一対のバネ受け部は、それぞれ第１回転軸（１０）および第２回転軸（１１）に当接してよい。   The elastic body may be a coil spring (12), and the guide rod (13) may be inserted into the coil spring (12). The guide rod (13) may be provided with a pair of spring receiving portions (14a, 14b) for receiving both ends of the coil spring (12). The pair of spring receiving portions are respectively a first rotating shaft (10) and a second rotating shaft. You may contact | abut to a rotating shaft (11).

１・・・電動工具、２・・・本体部、３・・・把持部、３ａ・・・ハンドル、３ｂ・・・下側延出部、３ｃ・・・上側延出部、５・・・第１連結部、７・・・第２連結部、１０・・・第１回転軸、１１・・・第２回転軸、１２・・・コイルバネ、１３・・・ガイドロッド、１３ａ・・・第１開口、１３ｂ・・・第２開口、１４ａ・・・第１バネ受け部、１４ｂ・・・第２バネ受け部。 DESCRIPTION OF SYMBOLS 1 ... Electric tool, 2 ... Main-body part, 3 ... Holding part, 3a ... Handle, 3b ... Lower extension part, 3c ... Upper extension part, 5 ... 1st connection part, 7 ... 2nd connection part, 10 ... 1st rotating shaft, 11 ... 2nd rotating shaft, 12 ... Coil spring, 13 ... Guide rod, 13a ... 1st 1 opening, 13b ... 2nd opening, 14a ... 1st spring receiving part, 14b ... 2nd spring receiving part.

Claims (6)

モータ、およびモータの回転出力を先端工具に伝達する運動伝達機構とを収容する本体部と、
前記本体部の後方側に第１連結部および第２連結部により連結された把持部と、を備えた電動工具であって、
前記第１連結部は、前記本体部と前記把持部とを回動自在に連結し、
前記第２連結部は、前記本体部と前記把持部の間に設けられる弾性体と、前記弾性体にかかる荷重方向を前記弾性体の軸線方向に維持するガイドロッドとを有する、
ことを特徴とする電動工具。 A main body that houses the motor and a motion transmission mechanism that transmits the rotational output of the motor to the tip tool;
A power tool including a grip portion connected to the rear side of the main body portion by a first connection portion and a second connection portion,
The first connecting part rotatably connects the main body part and the grip part,
The second connecting portion includes an elastic body provided between the main body portion and the grip portion, and a guide rod that maintains a load direction applied to the elastic body in an axial direction of the elastic body.
An electric tool characterized by that. 前記ガイドロッドは、前記本体部側の第１回転軸が挿入される第１開口と前記把持部側の第２回転軸が挿入される第２開口とを有し、前記第１開口または前記第２開口は、前記第１回転軸または前記第２回転軸が前記ガイドロッドの長手方向に摺動自在な形状を有する、
ことを特徴とする請求項１に記載の電動工具。 The guide rod has a first opening into which the first rotation shaft on the main body portion side is inserted and a second opening into which the second rotation shaft on the grip portion side is inserted, and the first opening or the first The two openings have a shape in which the first rotating shaft or the second rotating shaft is slidable in the longitudinal direction of the guide rod.
The power tool according to claim 1. 前記第１開口または前記第２開口は、前記ガイドロッドの長手方向に延びる長穴の形状を有する、
ことを特徴とする請求項２に記載の電動工具。 The first opening or the second opening has a shape of a long hole extending in a longitudinal direction of the guide rod.
The power tool according to claim 2, wherein: 前記弾性体はコイルバネであって、前記ガイドロッドは、コイルバネに内挿される、
ことを特徴とする請求項３に記載の電動工具。 The elastic body is a coil spring, and the guide rod is inserted into the coil spring.
The power tool according to claim 3. 前記ガイドロッドには、コイルバネの両端を受ける一対のバネ受け部が配置される、
ことを特徴とする請求項４に記載の電動工具。 A pair of spring receiving portions that receive both ends of the coil spring are disposed on the guide rod.
The power tool according to claim 4, wherein: 一対の前記バネ受け部は、それぞれ第１回転軸および第２回転軸に当接する、
ことを特徴とする請求項５に記載の電動工具。 The pair of spring receiving portions are in contact with the first rotating shaft and the second rotating shaft, respectively.
The power tool according to claim 5, wherein
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