CN101896318A - Electric tool - Google Patents

Electric tool Download PDF

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Publication number
CN101896318A
CN101896318A CN 200880120330 CN200880120330A CN101896318A CN 101896318 A CN101896318 A CN 101896318A CN 200880120330 CN200880120330 CN 200880120330 CN 200880120330 A CN200880120330 A CN 200880120330A CN 101896318 A CN101896318 A CN 101896318A
Authority
CN
China
Prior art keywords
described
brush carrier
tool housing
long axis
axis direction
Prior art date
Application number
CN 200880120330
Other languages
Chinese (zh)
Other versions
CN101896318B (en
Inventor
小仓裕纪
Original Assignee
株式会社牧田
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
Priority to JP2007328982A priority Critical patent/JP5191726B2/en
Priority to JP2007-328982 priority
Application filed by 株式会社牧田 filed Critical 株式会社牧田
Priority to PCT/JP2008/073209 priority patent/WO2009081868A1/en
Publication of CN101896318A publication Critical patent/CN101896318A/en
Application granted granted Critical
Publication of CN101896318B publication Critical patent/CN101896318B/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14Means for supporting or protecting brushes or brush holders
    • H02K5/143Means for supporting or protecting brushes or brush holders for cooperation with commutators
    • H02K5/148Slidably supported brushes

Abstract

A tool housing (103) has a brush holder receiving space (141) in an intermediate region in the longitudinal direction of the tool housing (103). A motor (121) has a brush holder (131) inserted and mounted in the brush holder receiving space (141) from a direction intersecting the longitudinal direction of the tool housing (103). The brush holder (131) has a tube section (132) for receiving a brush (133) and is integrally provided with a pressing receiving portion (139) adjacent to the tube section (132). A cover (109) is attached to the outer surface of one end of the tool housing (103) so as to cover the tool housing (103) along the longitudinal direction of the tool housing (103). The cover (109) has in its inner space a ridge (145) extending in the longitudinal direction, and the ridge (145) abuts against the pressing receiving portion (139) of the brush holder (131), inserted in the brush holder receiving space (141), to press the brush holder (131) in the inserting direction.

Description

Electric tool

Technical field

The present invention relates to possess the electric tool of the motor that front end tool is driven, specifically relate to the technique for fixing of brush carrier.

Background technology

Real opening in the flat 7-27274 communique (patent documentation 1) discloses the technique for fixing of brush carrier in electric tool in Japan.The brush carrier fixture construction that above-mentioned communique is put down in writing, from long axis direction insertion between the opposed stiffener of the rearward end formation of the long axis direction of the motor shell that constitutes tool body brush carrier is set, afterwards, cover when being assembled to the rearward end of motor shell when covering from long axis direction, the pin that utilization is arranged at this cover pushes brush carrier from long axis direction, thus this brush carrier is fixed.In addition, for a brush carrier among a plurality of brush carriers, utilize the rib that is arranged at cover this brush carrier to be fixed towards commutator side extruding brush carrier.

Above-mentioned brush carrier fixture construction is, is the stiffener that opposed shape setting is extended along this long axis direction in the rearward end of the long axis direction of motor shell, and brush carrier is inserted in the groove that forms between this stiffener and is assembled on this motor shell from the long axis direction of motor shell.Therefore, in the open structure of the end regions of motor shell, promptly not exist the structure of the functional part that this brush carrier is counteracted from the assembling of motor shell long axis direction at the end regions of motor shell be effective.

But, exist in the end of motor shell under the situation of structure of the functional part that the long axis direction assembling to brush carrier counteracts, more lean on zone line square in the long axis direction if want that promptly brush carrier is assembled to the end that enters than motor shell, then be difficult to use the assembling mode of the brush carrier that communique puts down in writing, the leeway of improvement is arranged in this.

Patent documentation 1: Japan opens flat 7-27274 communique in fact

Summary of the invention

The object of the present invention is to provide a kind of technology, in electric tool, what brush carrier can be assembled to tool housing enters into the interior side's of long axis direction zone line from end regions, and brush carrier stably can be fixed on this zone line.

In order to reach above-mentioned problem, the optimal way of the electric tool that the present invention relates to is that this electric tool has: tool housing, and its distolateral and another distolateral disposing respectively at long axis direction is used for functional part that front end tool is driven; Motor, it is contained in described tool housing, utilizes motor to drive front end tool, the processing operation that front end tool is stipulated thus.In addition, as " functional part of side configuration at one end " of the present invention, the typical case is equivalent to assemble the switch wiring mechanism portion of the power switch that is used to start or stops motor and the action bars of operating this power switch (handle) and the switch-side terminal that can be connected with motor-side terminal or brush etc., as " at the functional part of another distolateral configuration ", the typical case is equivalent to the rotation output of motor is passed to the Poewr transmission mechanism of front end tool.In addition, " electric tool " of the present invention, the typical case be equivalent to grinding operation, the employed disk grinder of grinding operation such with the electric tool of motor as drive source.

According to optimal way of the present invention, tool housing has the brush carrier receiving space at distolateral and another zone line of distolateral of the long axis direction of this tool housing.Motor has the direction of intersecting from the long axis direction with tool housing, promptly inserts the brush carrier receiving space and the brush carrier that assembles from radial outside.Brush carrier has the tube portion of accommodating brush, and is provided with the portion of being extruded integratedly with this adjacency.In addition, tool housing has a distolateral cover of the long axis direction that is installed in this tool housing.The hood-shaped hollow form that becomes an end opening, inner space with the tool housing long axis direction that links to each other with this opening, and have from the projecting strip part of open side to the long axis direction extension of tool housing in the inner space, by the long axis direction of described cover from opening along tool housing being covered an end outer surface and the zone line outer surface of this tool housing, an end outer surface of tool housing and zone line outer surface are housed in the inner space thus.And, when cover covered end outer surface of tool housing and zone line outer surface, the projecting strip part of inner space pushed this brush carrier with the portion that the is extruded butt of the brush carrier that inserts the brush carrier receiving space to direction of insertion, the direction (radially) of promptly intersecting with the long axis direction of tool housing.In addition, " with tube portion adjacency " of the present invention includes the mode of the lateral surface that directly is configured in a portion or is configured in any of the mode of portion's periphery.

According to optimal way of the present invention, owing to adopting direction that brush carrier is intersected from the long axis direction with tool housing, promptly insert the structure that is assembled on this tool housing to internal side diameter, so brush carrier can be assembled to zone line between each end of long axis direction of tool housing, i.e. the brush carrier receiving space in square zone in entering from an end of tool housing from radially outside diameter.Thus, in a distolateral for example deploy switch wiring mechanism portion of the long axis direction of tool housing, in the electric tool of the structure of another distolateral configuration Poewr transmission mechanism etc., can reasonably realize the assembleability of brush carrier to tool housing.

And the brush carrier that is inserted into the brush carrier receiving space of tool housing possesses the portion of being extruded, and this is extruded portion is assembled to an end of tool housing from long axis direction the projecting strip part of cover and pushes along direction of insertion.Brush carrier generally have will be contained in the brush of tube portion of this brush carrier towards the brush force application spring of commutator extruding.Therefore, the active force of force application spring is always along the direction opposite with direction of insertion, promptly extract directive effect in brush carrier, but according to the present invention, owing to adopt the structure of the projecting strip part of utilization cover, so brush carrier stably can be fixed on the brush carrier receiving space towards the portion that is extruded of direction of insertion extruding brush carrier.

Mode again according to the electric tool that the present invention relates to, side in brush carrier receiving space and brush carrier is provided with projection, be provided with recess with above-mentioned protrusions snap the opposing party, when brush carrier is inserted the brush carrier receiving space, projection engages with recess, thereby brush carrier is remained in the brush carrier receiving space.As mentioned above, towards the active force of the brush force application spring of commutator extruding brush along the direction opposite, promptly extract the brush carrier of directive effect in the state that is inserted into the brush carrier receiving space with direction of insertion.According to the present invention, owing to can remain on this brush carrier receiving space by projection will be inserted into the brush carrier receiving space with engaging of recess brush carrier, so when cover is assembled into tool housing, do not need the operator with pointing the operation that brush carrier is remained on the brush carrier receiving space, can improve the assembleability of brush carrier and cover.

Mode again according to the electric tool that the present invention relates to, the portion of being extruded has deformable taper guide portion, when assembling cover in the mode of long axis direction one end outer surface that covers tool housing and zone line outer surface, this guide portion guides in the mode with the projecting strip part butt of cover.According to the present invention, by the taper guide portion being set being extruded in the portion, when long axis direction one end outer surface that cover is assembled to tool housing and zone line outer surface, the projecting strip part that can make cover and the portion of being extruded be butt reliably.

According to the present invention, at electric tool, provide brush carrier can be assembled to tool housing enter into the interior side's of long axis direction zone line from end regions, and brush carrier stably can be fixed on the technology of this zone line.

Description of drawings

Fig. 1 is the integrally-built outside drawing of the electric disc grinder that relates to of expression embodiments of the present invention.

Fig. 2 is the integrally-built sectional view of expression electric disc grinder.

Fig. 3 is the integrally-built decomposition section of expression electric disc grinder.

Fig. 4 is the A portion enlarged drawing of Fig. 2.

Fig. 5 is the B portion enlarged drawing of Fig. 3.

Fig. 6 is the stereogram of expression back cover.

Fig. 7 is the stereogram of the structure of expression brush carrier.

Fig. 8 is a stereogram of representing the structure of brush carrier in the same manner.

Fig. 9 is a side view of representing the structure of brush carrier in the same manner.

Figure 10 is the stereogram that the preceding brush carrier resettlement section of brush carrier is inserted in expression.

Figure 11 is the C portion enlarged drawing of Figure 10.

Figure 12 is the figure that the process of brush carrier resettlement section is inserted brush carrier in expression.

Figure 13 is that the D of Figure 12 is to view.

Figure 14 is the figure of the state behind the expression brush carrier insertion brush carrier resettlement section.

Figure 15 is that the E of Figure 14 is to view.

Symbol description is as follows

101... electric disc grinder (electric tool); 103... main part (tool housing); 105... motor shell; 105a... mounting screw; 106... back casing; 107... gear-box; 109... back cover (cover); 109a... tube hole internal face; 111... Poewr transmission mechanism; 113... bevel pinion; 115... bevel gear wheel; 117... main shaft; 119... grinding stone (front end tool); 121... CD-ROM drive motor (motor); 123... output shaft; 124... cooling fan; 125... armature; 126... bearing; 127... stator; 128... bearing; 129... commutator; 131... brush carrier; 132... tube portion; 133... brush; 134... disc spring; 135a, 135b... insert sheet; 137... teat; 139... tab (being extruded portion); Brush carrier resettlement section 141... (brush carrier receiving space); 141a... opening; 142a, 142b... slit; 143... plate-like portion; 144... recess; 145... rib (projecting strip part); 147... clamping screw; 151... switch wiring mechanism portion; 153... switches set; 155... action bars.

The specific embodiment

Followingly embodiments of the present invention are elaborated with reference to Fig. 1~Figure 15.In the present embodiment, as an example of electric tool, use the grinding operation or the employed hand electric disk grinder of grinding operation of various machined materials such as metal, concrete, building stones to describe.Fig. 1 represents the overall structure of electric disc grinder 101 with outside drawing, and Fig. 2 represents the overall structure of electric disc grinder 101 with sectional view, and then Fig. 3 represents the overall structure of electric disc grinder 101 with decomposition section.In addition, Fig. 4 is the A portion enlarged drawing of Fig. 2, and Fig. 5 is the B portion enlarged drawing of Fig. 3, and Fig. 6 is the stereogram of expression back cover.

As Fig. 1~shown in Figure 3, electric disc grinder 101, the grinding stone 119 of showing the main part 103 of the gabarit that forms electric disc grinder 101 greatly and being configured in the front end area of main part 103 constitutes for main body.Main part 103 constitutes based on motor shell 105, gear-box 107 and back cover 109.Main part 103 is corresponding with " tool housing " of the present invention, and grinding stone 119 is corresponding with " front end tool " of the present invention.In addition, for convenience's sake, about the long axis direction of main part 103, before grinding stone 119 sides are called, after its opposition side is called.

Motor shell 105 roughly forms drum, contains CD-ROM drive motor 121 in the inner space of this motor shell 105.CD-ROM drive motor 121 is corresponding with " motor " of the present invention.CD-ROM drive motor 121 with its rotation direction become electric disc grinder 101 long axis direction, be that the mode of the long axis direction of main part 103 disposes.In addition, motor shell 105 constitutes when operation electric disc grinder 101 is processed operation and can be made for the shank part of dealer to be hold by one hand.

As shown in Figures 2 and 3, in the gear-box 107 that the leading section with motor shell 105 is connected, contain the Poewr transmission mechanism 111 that the rotation output of CD-ROM drive motor 121 is passed to grinding stone 119.Poewr transmission mechanism 111 based on drive the bevel pinion 113 that rotate as the driving side gear by CD-ROM drive motor 121, with the constituting of bevel pinion 113 engagements as the bevel gear wheel 115 of slave end gear with the main shaft 117 of bevel gear wheel 115 rotations, load and unload at the leading section of main shaft 117 and to be equipped with grinding stone 119 freely.Grinding stone 119 is configured in one distolateral (front side) of the long axis direction (long axis direction of main part 103) of motor shell 105 in the mode of the rotation quadrature of its rotation and CD-ROM drive motor 121.

The CD-ROM drive motor 121 of present embodiment is driven by the electric power that uses mains cord to supply with from power supply (socket).CD-ROM drive motor 121 based on output shaft 123, with the cooling fan 124 of output shaft 123 one rotations, with the armature 125 of output shaft 123 one rotation, be fixed in motor shell 105 stator 127, be arranged at the commutator 129 of the rear end side (opposition side of cooling fan 124) of output shaft 123, with the outer peripheral face sliding-contact of commutator 129 and supply with two brushes 133 of electric current and accommodate two brush carriers 131 of brush 133 and constitute.The leading section of output shaft 123 is by bearing 126 supportings of front side, and rearward end is supported by the bearing 128 of rear side and rotates freely.Wherein, constitute rotor by output shaft 123, armature 125, commutator 129.

Back casing 106 is connected with the rear end of motor shell 105.As shown in Figures 2 and 3, back casing 106 embeds at the leading section of long axis direction under the state of open rearward end portion of motor shell 105, and is fastening together by a plurality of mounting screw 105a that connected this motor shell 105 and stator 127 along long axis direction and extend.Back casing 106 is configured to cover the bearing 128 of commutator 129 and rear side, and switch wiring mechanism portion 151 is installed at the rear of this back casing 106.This switch wiring mechanism portion 151 by assembling motor on the switches set 153 that constitutes by dielectric synthetic resin drive usefulness power switch (omitting diagram for convenience), be used for to this power switch carry out the action bars 155 (with reference to Fig. 1) of ON, OFF operation, terminal, terminal that is connected with the motor-side terminal and the terminal that is connected with brush 133 etc. illustrated for convenience of omitting, that be connected with mains cord from external power source supply electric current constitute.In addition, in the present embodiment, consider the assembleability of 121 pairs of motor shells 105 of CD-ROM drive motor and back casing 106 and motor shell 105 are separated formation, but also can form.

Two brush carriers 131 that present embodiment relates to are installed on the back casing 106.In addition, back casing 106 is formed by dielectric synthetic resin.Below mainly the structure and the installation constitution thereof of brush carrier 131 are described with reference to Fig. 7~Figure 15.The overall structure of expression brush carrier in Fig. 7~Fig. 9 is represented the brush carrier resettlement section that brush carrier 131 assembles preceding state with stereogram in Figure 10, amplify the C portion of expression Figure 10 in Figure 11.In Figure 12, brush carrier is inserted the process of brush carrier resettlement section, the state that expression is observed along the D direction of arrow of Figure 12 in Figure 13.In addition, expression is inserted state behind the brush carrier resettlement section, the state that expression is observed along the E direction of arrow of Figure 14 in Figure 15 with brush carrier in Figure 14.

As mentioned above, dispose in the structure of switches set 153, be difficult to brush carrier 131 is inserted and is assembled on this back casing 106 along long axis direction from the rear of back casing 106 at the rear of back casing 106.Therefore, in the present embodiment, the direction that brush carrier 131 intersects from the long axis direction with back casing 106 is inserted and is assembled on the back casing 106.Therefore, on back casing 106 along the open brush carrier resettlement section 141 that radially forms concavity of side outwardly.Brush carrier resettlement section 141 is corresponding with " brush carrier receiving space " of the present invention.As shown in Figure 3, brush carrier resettlement section 141 separates predetermined distance (being 180 degree in the present embodiment) in the zone relative with commutator 129 at Zhou Fangxiang and sets two for.The zone relative with commutator 129 in the back casing 106 is corresponding with " zone line " of the present invention.

As shown in Figure 3, each brush carrier 131 direction of intersecting from long axis direction with back casing 106, promptly radially be inserted in the brush carrier resettlement section 141 and be assembled on the back casing 106.The overall structure of expression brush carrier 131 in Fig. 7~Fig. 9.Brush carrier 131 forms the regulation shape by the metallic plate of electric conductivity is processed.On brush carrier 131, form the cross section tube portion 132 in the form of a substantially rectangular of accommodating brush 133 that is useful on.Tube portion 132 extends along the direction of insertion of brush carrier 131, as shown in Figure 4, inserts under the state of brush carrier resettlement section 141 the opening 141a that the tube hole forms in the face of the internal face in brush carrier resettlement section 141 at brush carrier 131.Brush 133 is housed in the portion 132 sliding freely, this brush 133 radially is the outer peripheral face that the approximate right angle shape is connected to commutator 129 by opening 141a, and the disc spring 134 that is installed in brush carrier 131 is squeezed on the outer peripheral face of commutator 129 in mode that can sliding-contact.Disc spring 134 is brush force application springs, and the one end is ended by the hooking sheet 131a card of brush carrier 131, and the other end is observed towards commutator 129 sides brush 133 back side application of forces from the brush carrier direction of insertion.

In addition, brush carrier 131 is at distolateral two insertion sheet 135a, the 135b that form opposed shape each other that are provided with integratedly of the direction (housing long axis direction) of intersecting with the tube hole direction of tube portion 132.It is roughly inverted U-shaped from direction of insertion observation formation that one side (upside of Fig. 7 and Fig. 8) inserts sheet 135a, and the opposing party's (downside of Fig. 7 and Fig. 8) inserts sheet 135b and forms roughly L shaped from the direction of insertion observation.By with these two insert sheet 135a, 135b insert Figure 10 and shown in Figure 11 in the brush carrier resettlement section slit 142a, the 142b of 141 correspondingly-shaped that form, brush carrier 131 is configured in the assigned position of brush carrier resettlement section 141.Each slit 142a, 142b form by separate a plurality of plate-shaped members 143 that predetermined distance forms opposed shape in brush carrier resettlement section 141.

In addition, on each insertion sheet 135a, 135b, form the planar teat of hemisphere 137 (with reference to Figure 13).When inserting sheet 135a, 135b insertion slit 142a, 142b, the planar recess (or groove) 144 (with reference to Figure 11 and Figure 13) of teat 137 and the hemisphere that forms on plate-shaped member 143 engages, and brush carrier 131 is maintained at the assigned position (with reference to Figure 14 and Figure 15) of brush carrier resettlement section 141 thus.When brush carrier 131 inserts brush carrier resettlement section 141, when brush 133 is compressed on the outer peripheral face of commutator 129, for with brush 133 to commutator 129 extruding and to the active force of the disc spring 134 of these brush carrier 131 application of forces, in the direction opposite, promptly extract on the direction and play a role as counter-force with direction of insertion.Yet, utilize engaging of above-mentioned teat 137 and recess 144, can overcome the counter-force that acts on brush carrier 131 and this brush carrier 131 is remained on assigned position.

In addition, the brush carrier 131 that is configured in brush carrier resettlement section 141 is subjected to the back cover 109 that assembles in the mode that covers back casing 106 and is fixed (with reference to Fig. 4) from the rear side extruding of direction of insertion.Back cover 109 is corresponding with " cover " of the present invention.Back cover 109 is synthetic resin systems, as shown in Figure 6, forms the roughly cylindric of an end (front end) opening, and at interval forms two ribs 145 along long axis direction extending with 180 degree at the tube hole internal face 109a of back cover 109 on Zhou Fangxiang.Rib 145 is as strengthening part performance function.The tube hole is corresponding with " inner space " of the present invention, and rib 145 is corresponding with " projecting strip part " of the present invention.When the mode that covers this back casing 106 with the long axis direction from back casing 106 when back cover 109 was assembled, rib 145 was formed at the tab 139 (with reference to the double dot dash line of Fig. 4 and Fig. 9) of each brush carrier 131 from the rear side extruding of direction of insertion.Thus, brush carrier 131 is firmly fixed under the state that breaks away from from brush carrier resettlement section 141 preventing.Tab 139 is corresponding with " being extruded portion " of the present invention.Tab 139 is formed on a direction of insertion rear side of inserting sheet 135a with tube portion 132 adjacency.

In addition, it is skewed outstanding that the coverage direction (assembly direction) of tab 139 relative back covers 109 is, and can be out of shape.Thus, guiding makes the end of rib 145 and tab 139 carry out butt.By making tab 139 be skewed outstanding constitute " taper guide portion " of the present invention.

In addition, cover the back cover 109 of back casing 106, the front end periphery of its open end and back casing 106 is chimeric, is utilizing trip bolt 147 to be fastened on (with reference to Fig. 2) on the back casing 106 under this chimerism.Like this, back casing 106, brush carrier 131 and switches set 153 are housed in the back cover 109.In addition, be assembled in the action bars 155 of switches set 153, outstanding from the opening (omitting diagram for convenience) that the rearward end at back cover 109 forms as shown in Figure 1 to the outside, can be operated by the operator.Thereby, the operator controls motor shell 105 and the operation by action bars 155 to CD-ROM drive motor 121 driving of switching on, thereby can be rotated driving via 111 pairs of grinding stones 119 of Poewr transmission mechanism, carry out grinding, grinding operation rightly or cut off operation machined material.

In the present embodiment, brush carrier 131 is inserted the brush carrier resettlement section 141 of back casing 106 and is assembled on the back casing 106 from the long axis direction of back casing 106, the direction of promptly intersecting with the long axis direction of main part 103.Therefore, in the rearward end deploy switch wiring mechanism portion 151 of back casing 106,, can reasonably brush carrier 131 be assembled in the long axis direction zone line of back casing 106 to brush carrier 131 is assembled the casing structure that counteracts towards the place ahead from the rear of back casing 106.

According to present embodiment, be assemblied in the rib 145 of the back cover 109 of back casing 106 along long axis direction, with tab 139 butts of brush carrier 131, thereby and it is pushed this tab 139 to the direction of insertion of brush carrier 131 realize fixing.Therefore, can be with brush carrier 131 being fixed in the brush carrier resettlement section 141 in stable conditionly with anticreep.In addition, it is skewed outstanding that the assembly direction of tab 139 relative back covers 109 is, and can be out of shape, even thus and rib 145 and 139 deviations that relative positions take place on direction of insertion of tab, also can absorb this deviation luggage of going forward side by side and join.

In addition, in the present embodiment, owing to the plate-shaped member 143 of the insertion sheet 135a of brush carrier 131, formation slit 142a, 142b that 135b guides to brush carrier resettlement section 141 and insert among this slit 142a, the 142b, therefore can carry out the insertion operation of 131 pairs of brush carrier resettlement sections 141 of brush carrier easily.

In addition, after brush carrier 131 is inserted brush carrier resettlement section 141, be arranged at the teat 137 that inserts sheet 135a, 135b and engage with the recess 144 of brush carrier resettlement section 141 sides.Thus, brush carrier 131 overcomes the active force of the disc spring 134 of brush 133 application of forces and remains on assigned position.Thereby, when back cover 109 is installed on back casing 106, do not need the operator with pointing the operation that brush carrier 131 is remained on brush carrier resettlement section 141, can improve the assembling operation of brush carrier 131 and back cover 109.

In addition, in the present embodiment, example as electric tool uses electric disc grinder 101 to be illustrated, but so long as the rearward end of back casing 106 exist switch wiring mechanism portion 151 such become the electric tool of brush carrier 131 from the structure of the parts of the obstruction of the rearward assembling mode in the place ahead of back casing 106, just can be suitable for.

Claims (3)

1. electric tool is characterized in that having:
Tool housing, its distolateral and another distolateral disposing respectively at long axis direction is used for functional part that front end tool is driven;
Motor, it is contained in described tool housing, by driving the processing operation that front end tool is stipulated;
The brush carrier receiving space, it is formed on distolateral and another distolateral the zone line on the long axis direction in the described tool housing;
Brush carrier, it is arranged at described motor, and inserts described brush carrier receiving space and be assembled from the direction that the long axis direction with described tool housing intersects, this brush carrier has the tube portion of accommodating brush, and with this one in abutting connection with and be provided with the portion of being extruded integratedly; With
Be installed in the distolateral cover on the long axis direction of described tool housing,
The described hood-shaped hollow shape that becomes an end opening; And has the space, inside on the described tool housing long axis direction that links to each other with this opening; And has the projecting strip part that the long axis direction from described open side along described tool housing extends in described inner space; By the long axis direction of described cover from described opening along described tool housing being covered an end outer surface and the middle regional outer surface of this tool housing; Thus a described end outer surface and middle regional outer surface are housed in the inner space
Described projecting strip part and the portion that the is extruded butt that is inserted into the described brush carrier of described brush carrier receiving space push this brush carrier to the direction of insertion that the long axis direction with described tool housing intersects.
2. electric tool according to claim 1 is characterized in that,
Side in described brush carrier receiving space and described brush carrier is provided with projection, be provided with recess with described protrusions snap the opposing party, when described brush carrier being inserted into described brush carrier receiving space, described projection and the engaging of described recess, thus described brush carrier is remained in the described brush carrier receiving space.
3. electric tool according to claim 1 is characterized in that,
The described portion of being extruded has deformable taper guide portion, and when an end outer surface that in a covered manner described cover is assemblied in described tool housing and zone line outer surface, described guide portion guides it in the mode with the projecting strip part butt of described cover.
CN 200880120330 2007-12-20 2008-12-19 Electric tool CN101896318B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2007328982A JP5191726B2 (en) 2007-12-20 2007-12-20 Electric tool
JP2007-328982 2007-12-20
PCT/JP2008/073209 WO2009081868A1 (en) 2007-12-20 2008-12-19 Electric tool

Publications (2)

Publication Number Publication Date
CN101896318A true CN101896318A (en) 2010-11-24
CN101896318B CN101896318B (en) 2013-05-15

Family

ID=40801169

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200880120330 CN101896318B (en) 2007-12-20 2008-12-19 Electric tool

Country Status (3)

Country Link
JP (1) JP5191726B2 (en)
CN (1) CN101896318B (en)
WO (1) WO2009081868A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103506958A (en) * 2012-06-15 2014-01-15 株式会社牧田 Water injection type electric tool
CN105082085A (en) * 2014-05-09 2015-11-25 株式会社牧田 Electric power tool

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5502585B2 (en) * 2010-04-26 2014-05-28 株式会社マキタ Brush holder and electric tool provided with brush holder
DE102010021506B4 (en) * 2010-05-26 2012-02-23 Atlanta-Elektrosysteme Gmbh Brush bridge
US9620044B2 (en) 2012-10-05 2017-04-11 Sharp Kabushiki Kasiha Image display device and drive method therefor
US9548013B2 (en) 2012-10-05 2017-01-17 Sharp Kabushiki Kaisha Image display device and drive method therefor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2605891Y2 (en) * 1993-10-28 2000-08-21 株式会社マキタ Mounting structure of brush assembly
JPH0733579U (en) * 1993-11-26 1995-06-20 日立工機株式会社 Electric tool
JP4639061B2 (en) * 2004-07-29 2011-02-23 株式会社マキタ Electric tool
JP2007152479A (en) * 2005-12-02 2007-06-21 Makita Corp Power tool

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103506958A (en) * 2012-06-15 2014-01-15 株式会社牧田 Water injection type electric tool
CN103506958B (en) * 2012-06-15 2016-10-05 株式会社牧田 Water injection type electric tool
CN105082085A (en) * 2014-05-09 2015-11-25 株式会社牧田 Electric power tool
CN105082085B (en) * 2014-05-09 2018-10-16 株式会社牧田 Electric tool

Also Published As

Publication number Publication date
WO2009081868A1 (en) 2009-07-02
JP5191726B2 (en) 2013-05-08
CN101896318B (en) 2013-05-15
JP2009148855A (en) 2009-07-09

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