JPH039931Y2 - - Google Patents
Info
- Publication number
- JPH039931Y2 JPH039931Y2 JP1982196801U JP19680182U JPH039931Y2 JP H039931 Y2 JPH039931 Y2 JP H039931Y2 JP 1982196801 U JP1982196801 U JP 1982196801U JP 19680182 U JP19680182 U JP 19680182U JP H039931 Y2 JPH039931 Y2 JP H039931Y2
- Authority
- JP
- Japan
- Prior art keywords
- inner cover
- case
- motor case
- screws
- gear case
- 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.)
- Expired
Links
- 239000004033 plastic Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000470 constituent Substances 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Drilling And Boring (AREA)
Description
【考案の詳細な説明】
本考案は、複数個の部材を合着してなる電動ド
リルのケース構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a case structure for an electric drill formed by bonding a plurality of members together.
従来の上述ケースは、第１図に示したように、
ギヤケースａと、インナーカバーｂと、モーター
ケースｃと、ハンドルカバーｄを順次取付ビスｅ
…にて連結して構成されている。又電動ドリルの
モーターケースは、使用者の手が触れ易い部分を
感電防止、雑音防止の規定等によつて全てプラス
チツク製に改めつゝある。 In the conventional case described above, as shown in Figure 1,
Attach gear case a, inner cover b, motor case c, and handle cover d in sequence with screws e.
It is constructed by connecting... In addition, the motor cases of electric drills are all being made of plastic in order to prevent electrical shock and noise in areas that are easily touched by the user.
しかしながら、モーターケースをプラスチツク
製とした場合、取付ビスｅによる締付強度は、軽
合金による場合に比較して低下することは否めな
い。従つて、従来は上記締付強度を上げる対策と
して、ネジの有効長さを長くしたり、ビス止め部
分に金属部材をインサートして埋め込む等してい
るが、これとても十分な締着強度が得られないの
が現状である。 However, when the motor case is made of plastic, the tightening strength of the mounting screws e is undeniably lower than when it is made of light alloy. Therefore, conventional measures to increase the tightening strength mentioned above include increasing the effective length of the screw or inserting a metal member into the screwed part, but these methods do not provide sufficient tightening strength. The current situation is that it cannot be done.
そこで本考案は上述従来の事情に鑑みて検討の
結果、モーターケースとギヤケースの両方とも感
電防止、雑音防止対策としてプラスチツク製と
し、該モーターケースの前端内部に軽金属製のイ
ンナーカバーを固定し、このインナーカバーに締
付ネジを螺着して上記モーターケース及びギヤケ
ースと共にポケツト部の凸部を同時に一体化して
構成することによつて締付強度を向上できること
を目的とした電動ドリルのケース構造を得たもの
である。 Therefore, as a result of consideration in view of the above-mentioned conventional circumstances, the present invention was developed by making both the motor case and gear case made of plastic as a measure to prevent electric shock and noise, and fixing a light metal inner cover inside the front end of the motor case. A case structure for an electric drill is provided which aims to improve the tightening strength by screwing a tightening screw into the inner cover and integrating the convex part of the pocket part with the motor case and gear case at the same time. It is something that
以下本考案を図示の実施例に基づいて詳述すれ
ば、第２図ないし第６図に示したように、モータ
ーケース１と、インナーカバー２と、ギヤケース
３とを連結して構成されるもので、上記モーター
ケース１はハンドルケースを兼用するよう側面略
Ｌ字形状に屈曲して対称に成形した２個のプラス
チツク製ハウジング１ａ，１ｂを第４図に示した
如く、夫々の開口端で突き合せ、その一方に設け
た孔４…にネジ５を挿通し、該孔４と対向して他
方に設けたネジ孔６…に螺合することで合着し形
成されている。 The present invention will be described in detail below based on the illustrated embodiments.As shown in FIGS. 2 to 6, the present invention is constructed by connecting a motor case 1, an inner cover 2, and a gear case 3. The motor case 1 has two symmetrically molded plastic housings 1a and 1b bent into an approximately L-shape on the side so as to double as a handle case, as shown in FIG. They are joined together by inserting screws 5 into holes 4 provided on one side and screwing them into screw holes 6 provided on the other side facing the holes 4.
又、上記モーターケース１の前端は開口されて
いて、その開口端内部には、両ハウジング１ａ，
１ｂの内壁から凸部１ｃ，１ｄを前後方向へ適当
な間隔をもつて対向周設することにより上記イン
ナーカバー２が嵌合するためのポケツト部７を周
設してある。 The front end of the motor case 1 is open, and inside the open end are both housings 1a,
A pocket portion 7 into which the inner cover 2 is fitted is provided by protruding portions 1c and 1d facing each other at an appropriate distance in the front-rear direction from the inner wall of 1b.
上記インナーカバー２は軽金属によつて一体
に、かつ上記ポケツト部７に密嵌可能な外形と幅
をもつ周縁部２ｂを板状部２ａに設けて成形され
ていると共に、該板状部２ａには軸承部２ｃ，２
ｅが夫々設けて形成されている。 The inner cover 2 is integrally formed of light metal and has a peripheral edge part 2b having an outer shape and a width that can be tightly fitted into the pocket part 7 on a plate-like part 2a. is the shaft bearing part 2c, 2
e are provided respectively.
かくして、上記インナーカバー２は、上記ハウ
ジング１ａ，１ｂをネジ５止めによつて合着する
に先だつて、各ハウジング１ａ，１ｂに一半穴形
成した上記ポケツト部７に嵌合し、然る後両ハウ
ジング１ａ，１ｂをネジ止め合着することでモー
ターケース１の前端内部に固定される。 Thus, before the housings 1a and 1b are fastened together with the screws 5, the inner cover 2 is fitted into the pocket portion 7 formed in each of the housings 1a and 1b. The housings 1a and 1b are fixed inside the front end of the motor case 1 by screwing them together.
又、上記ギヤケース３は、軽金属性であつても
よいが、プラスチツク製の方がより安全性が高い
ものとなり、例えば、プラスチツクによつて中空
に一体成形されていて、その後端開口縁３ａは、
上記モーターケース１の前端開口部から内向きに
突設されている一方の上記凸部１ｃと突き合せ可
能に形成されており、一方前端開口部は軸承部３
ｂに形成されている。 Although the gear case 3 may be made of light metal, it is safer to make it from plastic. For example, the gear case 3 is integrally molded in a hollow manner with plastic, and the opening edge 3a at the rear end is made of plastic.
It is formed so as to be able to butt against one of the convex portions 1c protruding inwardly from the front end opening of the motor case 1, and the front end opening is connected to the shaft bearing portion 3.
It is formed in b.
かくして、ギヤケース３は、その後端開口縁３
ａを上記モーターケース１の前端開口部に突き合
せすると、ポケツト部７を形成する一方の凸部１
ｃに突き合せされるから、上記モーターケース１
とギヤケース３の結合は、ギヤケース３に設けた
複数個の孔３ｃ…から締付ネジ８を挿通して、上
記インナーカバー２の周縁部２ｂに設けたネジ孔
２ｄに第６図に示したように螺合し、インナーカ
バー２とギヤケース３を締着すると同時にポケツ
ト部７の凸部１ｃを締着一体化することにより上
記ギヤケース３とモーターケース１は締着一体化
されてケースは構成されている。 Thus, the gear case 3 has the rear end opening edge 3
When a is butted against the front end opening of the motor case 1, one of the convex portions 1 forming the pocket portion 7
Since it is butted against c, the above motor case 1
To connect the gear case 3 and the gear case 3, insert the tightening screws 8 through the plurality of holes 3c provided in the gear case 3 and insert them into the screw holes 2d provided in the peripheral edge 2b of the inner cover 2 as shown in FIG. By screwing together the inner cover 2 and the gear case 3 and simultaneously tightening and integrating the convex portion 1c of the pocket portion 7, the gear case 3 and the motor case 1 are integrated and the case is constructed. There is.
こゝで、モータＭの軸９の後端部は、モーター
ケース１に内装した軸受１０に支承され、又、該
軸９の前端部は上記インナーカバー２の軸承部２
ｃに支承されている。 Here, the rear end of the shaft 9 of the motor M is supported by a bearing 10 built into the motor case 1, and the front end of the shaft 9 is supported by the bearing 2 of the inner cover 2.
It is supported by c.
又、前端にチヤツク１１を備えた駆動軸１２
は、インナーカバー２の軸承部２ｅと、ギヤケー
ス３の軸承部３ｂに夫々回転自在に支承されてお
り、該駆動軸１２に固定したギヤ１３は、上記モ
ーター軸９に設けたギヤ１４と、中間ギヤ１５，
１６を介して連動するよう噛合してある。 Also, a drive shaft 12 with a chuck 11 at the front end.
is rotatably supported by a shaft bearing portion 2e of the inner cover 2 and a shaft bearing portion 3b of the gear case 3, respectively, and a gear 13 fixed to the drive shaft 12 is connected to a gear 14 provided on the motor shaft 9 and an intermediate portion. gear 15,
They are interlocked so as to interlock via 16.
尚、上記モーターケース１の後端に曲成した部
分がハンドルカバーとなつて、ON，OFFスイツ
チが付設させてある。 Incidentally, a curved portion at the rear end of the motor case 1 serves as a handle cover, and an ON/OFF switch is attached thereto.
以上説明したように本考案に係る電動ドリルの
ケース構造によれば、対称に成形した２個のハウ
ジング１ａ，１ｂを開口端で突き合せてネジ５止
めにより合着して形成されるプラスチツク製のモ
ーターケース１の前端内部にポケツト部７を設け
て軽金属製のインナーカバー２を嵌着固定し、該
インナーカバー２に穿設したネジ孔２ｄ…に締付
ネジ８…をネジ込んで、プラスチツク製のギヤケ
ース３及びモーターケース１と同時にポケツト部
７の凸部１ｃを締着して構成したものであるか
ら、表面に露出するモーターケース１と、ギヤケ
ース３を感電防止及び雑音防止の対策としてプラ
スチツク製としたにもかかわらず、ギヤケース３
の複数の孔３ｃに締付ネジ８を貫通して、モータ
ーケース１の内部に装着した軽金属製のインナー
カバー２に締付ネジ８を螺合して、ギヤケース３
とモーターケース１とを締着一体化でき、さら
に、締付ネジ８を螺合するネジ孔２ｄが軽金属製
であるから、ネジ孔がプラスチツク製である場合
に比べて、締付強度を格段に向上でき、使用中振
動の激しいギヤケース３を強固に結合できると共
にネジ孔３の摩耗および破損を防止できる。 As explained above, according to the case structure of the electric drill according to the present invention, two symmetrically molded housings 1a and 1b are butted at their open ends and joined together with screws 5. A pocket part 7 is provided inside the front end of the motor case 1, an inner cover 2 made of light metal is fitted and fixed therein, and a tightening screw 8 is screwed into the screw hole 2d made in the inner cover 2, and a pocket part 7 made of plastic is provided. Since the convex portion 1c of the pocket portion 7 is fastened together with the gear case 3 and motor case 1, the motor case 1 and gear case 3 exposed on the surface are made of plastic to prevent electric shock and noise. Despite this, gear case 3
The tightening screws 8 are passed through the plurality of holes 3c of the motor case 1, and the tightening screws 8 are screwed into the light metal inner cover 2 mounted inside the motor case 1.
and the motor case 1, and since the screw hole 2d into which the tightening screw 8 is screwed is made of light metal, the tightening strength is significantly increased compared to when the screw hole is made of plastic. The gear case 3, which vibrates strongly during use, can be firmly connected, and wear and damage of the screw hole 3 can be prevented.
又、軽金属のインナーカバー１２は、モーター
ケース１の内部に取付けられ、表面に露出してい
ないから感電及び雑音防止の効果がある。 Furthermore, the light metal inner cover 12 is installed inside the motor case 1 and is not exposed on the surface, so it is effective in preventing electric shock and noise.
さらに、軽金属製のインナーカバー２に軸承部
２ｃ，２ｅを設けているから、過負荷使用時に軸
受部２ｃ，２ｅの過熱による変形を防止できると
共に軸承部の機械的強度を高くできるといつた効
果がある。 Furthermore, since the bearing parts 2c and 2e are provided on the inner cover 2 made of light metal, it is possible to prevent deformation of the bearing parts 2c and 2e due to overheating during overload use, and the mechanical strength of the bearing part can be increased. There is.
又、構造的には、モーターケース１の構成部材
たる両ハウジング１ａ，１ｂはプラスチツクにて
成形するのでインナーカバーのポケツト部７も同
時に容易に成形できて、かつ数少ない部材をもつ
て構造簡単に製作できるから安価に提供すること
ができる。 In addition, structurally, since both housings 1a and 1b, which are the constituent members of the motor case 1, are molded from plastic, the pocket portion 7 of the inner cover can be easily molded at the same time, and the structure is easily manufactured using only a few parts. Because we can do it, we can provide it at a low price.
第１図は従来の電動ドリルのケースを示した側
面図、第２図は本考案に係る電動ドリルのケース
を具備する電動ドリルの縦断側面図、第３図は同
ドリルの正面図、第４図、第５図は第２図におけ
る−線、−線各断面図、第６図は第３図
における−線矢視断面図である。
１……モーターケース、１ａ，１ｂ……ハウジ
ング、１ｃ，１ｄ……凸部、２……インナーカバ
ー、２ｂ……ネジ孔、３……ギヤケース、５……
ネジ、８……締付ネジ。
Fig. 1 is a side view showing a case of a conventional electric drill, Fig. 2 is a vertical sectional side view of an electric drill equipped with the case of the electric drill according to the present invention, Fig. 3 is a front view of the same drill, and Fig. 4 is a side view showing a case of a conventional electric drill. 5 are sectional views taken along lines - and - in FIG. 2, and FIG. 6 is a sectional view taken along the - line in FIG. 3. 1...Motor case, 1a, 1b...Housing, 1c, 1d...Protrusion, 2...Inner cover, 2b...Screw hole, 3...Gear case, 5...
Screw, 8...Tightening screw.
Claims (1)
動ドリルのケースにおいて、モーターケース１
は、対称に形成した２個のプラスチツク製ハウジ
ング１ａ，１ｂをネジ５…止めにより合着して、
その前端内壁面に突設した凸部１ｃ，１ｄにより
形成されるポケツト部７に軽金属製のインナーカ
バー２の周縁部２ｂを嵌合して、上記インナーカ
バー２を上記モーターケース１の内側に装着し、
上記インナーカバーには駆動軸１２を支持する軸
承部２ｂと軸９を支持する軸承部２ｃとを設ける
と共に、上記周縁部２ｂにはネジ孔２ｄを設け、
プラスチツク製のギヤケース３に設けた孔３ｃか
ら上記インナーカバー２の上記ネジ孔２ｄに締付
ネジ８を螺合することにより、上記ギヤケース３
とモーターケース１とを上記インナーカバー２を
介して締着一体化し、上記インナーカバーは表面
に露出しないよう構成したことを特徴とする電動
ドリルのケース構造。 In the case of an electric drill made up of multiple parts joined together by screws, the motor case 1
, two symmetrically formed plastic housings 1a, 1b are joined together with screws 5...
The inner cover 2 is attached to the inside of the motor case 1 by fitting the peripheral edge 2b of the inner cover 2 made of light metal into the pocket portion 7 formed by the convex portions 1c and 1d protruding from the inner wall surface of the front end. death,
The inner cover is provided with a bearing part 2b for supporting the drive shaft 12 and a bearing part 2c for supporting the shaft 9, and a screw hole 2d is provided in the peripheral part 2b,
By screwing the tightening screw 8 into the screw hole 2d of the inner cover 2 from the hole 3c provided in the plastic gear case 3, the gear case 3 is removed.
and a motor case 1 are fastened and integrated via the inner cover 2, and the inner cover is configured so as not to be exposed to the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19680182U JPS59100514U (en) | 1982-12-26 | 1982-12-26 | Electric drill case structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19680182U JPS59100514U (en) | 1982-12-26 | 1982-12-26 | Electric drill case structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59100514U JPS59100514U (en) | 1984-07-06 |
| JPH039931Y2 true JPH039931Y2 (en) | 1991-03-12 |
Family
ID=30422014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19680182U Granted JPS59100514U (en) | 1982-12-26 | 1982-12-26 | Electric drill case structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59100514U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5730064U (en) * | 1980-07-28 | 1982-02-17 |
-
1982
- 1982-12-26 JP JP19680182U patent/JPS59100514U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5730064U (en) * | 1980-07-28 | 1982-02-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59100514U (en) | 1984-07-06 |
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