CN102310353A

CN102310353A - Electric tool

Info

Publication number: CN102310353A
Application number: CN2011101092967A
Authority: CN
Inventors: 川上高弘
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2010-07-01
Filing date: 2011-04-28
Publication date: 2012-01-11
Also published as: JP5447977B2; JP2012011513A; BRPI1103080A2; BRPI1103080B1

Abstract

The invention provides an electric tool, which can reduce misoperation of an opening/closing operation component of a valve and increase the operability as well. A disc-type sander (1) has a hose (14) and a valve (12). The valve has an operating lever (13). Supplied water can be sprayed out from a rotating shaft (4) via the hose (14). The lower portion of a handle (8) is extended to form a protection part (10), which surrounds the space below the handle (8) having a trigger (9) and is connected with the handle (8) to form a ring shape. In the protection part (10), a part of the hose (14) penetrates, and the valve (12) is mounted. The operating lever (13) is projected into the lower space.

Description

Electric tool

Technical field

The present invention relates to electric tools such as a kind of grinder or sander, its front portion that is used for receiving the housing of dress motor has the turning cylinder that is rotated by this motor-driven, and instruments such as emery wheel or polishing dish are installed on the said turning cylinder.

Background technology

For example, the front portion that being used for of sander received the electric machine casing of dress motor is connected with gear-box, and this gear-box supports turning cylinder and is the state that intersects vertically with it, and this turning cylinder is rotated by driving through conical gear.From the end of this outstanding turning cylinder of gear-box the polishing dish is being installed and is being used.

Following a kind of sander that adopts said structure is arranged now, and it has: fluid supply tube, supply fluids such as water or grinding agent from the outside by it; Valve when opening and closing operations parts such as action bars are operated, opens and closes the stream in the fluid supply tube by this valve.Fluid by the fluid supply tube supply can spray from turning cylinder.As the sander of the fluid supply apparatus with said structure, it is following for example in patent documentation 1, to disclose its concrete structure: the fluid supply tube road that is made up of pipe not only is set in the turning cylinder axle center, also on housing top valve is set.To move on the housing upper surface from the outside pipe that is connected with valve, the action bars that valve is carried out opening and closing operations also will be set on the housing upper surface.In addition; Following a kind of lapping device is disclosed in patent documentation 2: the grinding agent squit hole that is arranged on the turning cylinder axle center is communicated with grinding agent through hole in being arranged on housing; Also valve is set on the horizontal hand grip on the housing and this valve is connected with pipe arrangement from the outside with the grinding agent through hole respectively, and on the valve rod of valve, opening and closing operations is set and uses button outstanding being arranged at.

The specification that No. the 2238096th, [patent documentation 1] U.S.'s patent of invention

Real fair 1-15499 number of the open communique of [patent documentation 2] Japanese Utility Model patent

In the sander of above-mentioned prior art, because opening and closing operations parts such as action bars and button all are arranged on the housing upside, so following problem possibly occur: can accommodating fluid when by error the opening and closing operations parts being operated once in a while.

In addition, as the type of the sander of horizontal use, the known following a kind of structure of people: extending back at the rear portion of its housing is provided with the linearly handle of shape, has the functional units such as trigger that can make motor break-make electricity on the lower surface of this handle.Usually when using this sander, a hand of handle is operated and controlled to functional unit and the another hand of controlling the anterior part of housing or controlling the assist handle that is horizontally installed on the housing etc. all can't be vacateed.Therefore, when the opening and closing operations parts that are arranged on housing top being operated, need change handgrip and hold housing or interim interruption processing, so its property easy to use is relatively poor for accommodating fluid.

Summary of the invention

To this; The object of the present invention is to provide a kind of electric tool, it laterally uses and handle extend to be provided with, and it is less that the problem of faulty operation opening and closing operations parts appears in this electric tool; And the operability of these opening and closing operations parts improves, so it has property easy to use preferably.

For realizing above-mentioned purpose; In technical scheme 1 described invention; Extension is provided with protection department in the handle bottom; This protection department is around comprising this handle lower side space of functional unit and be connected to annular with this handle, in protection department, not only made the part of fluid supply tube from wherein passing but also receives the dress valve, and the opening and closing operations parts are given prominence in lower side space.

On the basis of technical scheme 1, in the technical scheme 2 described inventions, in lower side space, the position after the opening and closing operations parts are arranged on and lean on than functional unit.

[invention effect]

When adopting the described invention of technical scheme 1, owing to the opening and closing operations parts of valve are also centered on by protection department with functional unit, so the problem of faulty operation opening and closing operations parts can reduce.And,, therefore can improve property easy to use so the operability of opening and closing operations parts improves owing to can come the controlled opening/closing functional unit with the hand of controlling handle.In addition, because the part of fluid supply tube is contained in the protection department by receipts, thus can reduce situation that this fluid supply tube is exposed helping to protect this fluid supply tube, and can also reduce the influence that fluid supply tube brings to operations.

When on the effect basis that technical scheme 1 obtains, adopting technical scheme 2 described inventions; Can not influence operation even the opening and closing operations parts are outstanding in lower side space yet, so can under the state that they are not interfered each other, not operate on it respectively functional unit.

Description of drawings

Fig. 1 is the figure of the whole disk sander of expression;

Fig. 2 be the expression along cutting line A-A dissect and cutaway view.

[description of reference numerals]

1, disk sander; 2, electric machine casing; 3, gear-box; 4, turning cylinder; 5, the disc instrument; 7, handle housing; 8, handle; 9, trigger; 10, protection department; 11, water filling device; 12, valve; 13, action bars; 14, flexible pipe; 15, spray nozzle part

The specific embodiment

Embodiment of the present invention is described with reference to the accompanying drawings.

Fig. 1 representes the disk sander as an example of electric tool.Being used for of this disk sander 1 laterally received the front portion (right side among Fig. 1) of the tubular electric machine casing 2 of dress motor; Be connected with the gear-box 3 of motor output shaft from wherein highlighting; Via conical gear make the turning cylinder that is mounted pivotably on the above-below direction 4 in gear-box 3 with output shaft engagement, the lower end that also makes turning cylinder 4 is outstanding and disc instrument 5 such as polishing dish is installed at this to the below of gear-box 3.Reference numeral 6 expression safety guards, the rear portion that it is installed in the following of gear-box 3 and is used for covering disc instrument 5.

In addition, the rear portion of electric machine casing 2 is connected with and makes the outstanding backward handle housing 7 that is provided with of handle 8.Lower surface toe lateral at handle 8 is provided with the downward trigger 9 as functional unit, and trigger 9 is arranged on the switch that can make motor break-make electricity.

Also have, in handle housing 7, in the extension of the bottom of handle 8 protection department 10 is set, this protection department 10 is connected to annular around the lower side space of this handle 8 that comprises trigger 9 and with this handle 8.In addition, handle housing 7 warps are assembled the halfbody housing of pair of right and left and are formed, and are formed with handle 8 and protection department 10 on this folding housing.

Above-mentioned disk sander 1 has water filling device 11.The structure of this water filling device 11 is: have to be received as the valve 12 of the action bars 13 of opening and closing operations parts and be contained in the rear portion of protection department 10; The flexible pipe 14 as fluid supply tube that is connected the front portion of valve 12 runs through protection department 10 and moves the outside to from the place ahead of protection department 10; Before the lower direction of electric machine casing 2, extend afterwards, the spray nozzle part 15 of the front end that is arranged at this flexible pipe is connected on the back surface of gear-box 3.

In addition; Be formed with annular water filling portion 16 around the turning cylinder 4 in gear-box 3; Be formed with in the axle center of turning cylinder 4 and be communicated with water filling portion 16 and the lower end has the importing road 17 of ejiction opening 18, can be by the water of spray nozzle part 15 supplies from water filling portion 16 through importing roads 17 from ejection

18 ejections.Also have, be provided with plug 19 and outstanding backward at the rear portion of valve 12, can be connected with the socket of the not shown flexible pipe that is connected in sources of supply such as running water pipe or pump here from the rear end of protection department 10.

Reference numeral 20 expressions are arranged on the location-plate between valve 12 and the plug 19.As shown in Figure 2, location-plate 20 has the through hole 22 chimeric with the parallel plane portion 21 that is formed at valve 12, and is when adopting this embedded structure, mounted thereto and be the state of intersecting vertically with it under the state that location-plate 20 rotates with limiting valve 12.Two recesses 23 that the right ends of location-plate 20 and recessed is arranged on the halfbody housing that is used for forming protection department 10 are chimeric, and when assembling handle housing 7, valve 12 is the state of limited in rotation under the effect of location-plate 20.

In addition, the action bars 13 that is arranged on the valve 12 projects upwards at the rear portion of protection department 10, the setting of action bars 13 require be: action bars 13 was along the direction of protection department 10 forward when valve 12 was in closure state.Even action bars 13 is in this downside that also can not be projected into trigger 9 forward during state.During the lower side space of the handle 8 that action bars 13 is positioned at centered on, can make its contingency that is rotated reduce to utmost point low degree by protection department 10.

In the disk sander with said structure 1, with controlling that of handle 8 pulls trigger action 9 and during drive motors, disc instrument 5 rotates with turning cylinder 4 together, like this can be to being carried out attrition process by the grinding material.At this moment, another hand or control the not shown assist handle that laterally connects with it on the side of gear-box 3, or the top of controlling gear-box 3 is to keep the duty of disk sander 1.

At this moment; When carrying out attrition process, needing water filling; With the finger lateral rotation action bars 13 of the hand of controlling handle 8 and open valve 12, the water by the source of supply supply is supplied to water filling portion 16 through flexible pipe 14 from spray nozzle part 15 like this, and through the importing road 17 of turning cylinder 4 and from ejiction opening 18 ejections.Make it to discharge under the state that therefore, can not disperse with water at the dust that attrition process produced.When cutting off the water, the state that also with the finger of hand of controlling handle 8 action bars 13 is returned forward gets final product.Hold disk sander 1 owing to change handgrip, and just can carry out rotating operation, so when use water filling device 11, need not to interrupt attrition process action bars 13 with the hand of controlling handle 8 all need not in any case of discharging water, cut off the water.

Like this; When employing has the disk sander 1 of said structure; Extend lower side space and the protection department 10 that link to each other with handle 8 annulars that is provided with around the handle 8 that comprises trigger 9 in the bottom of handle 8; In protection department 10, not only made the part of flexible pipe 14 valve 12 is housed, and made action bars 13 outstanding in lower side space from wherein passing but also receiving.Because action bars 13 is also centered on by protection department 10 with trigger 9 together, so the problem of faulty operation action bars 13 can reduce.And,, therefore can improve property easy to use so the operability of action bars 13 improves owing to can come operating operation bar 13 with the hand of controlling handle 8.In addition, because the part of flexible pipe 14 is contained in the protection department 10 by receipts, thus can reduce situation that flexible pipe 14 is exposed helping to protect flexible pipe 14, and can also reduce the influence that flexible pipe 14 brings to operations.

Especially in the present invention; In lower side space; Because the position after action bars 13 is provided with and leans on than trigger 9,, therefore can under the state that they are not interfered each other, not operate on it respectively so do not influence operation to trigger 9 even action bars 13 is outstanding in lower side space yet.

In addition, also can adopt other structures such as button or switch lever as functional unit, except action bars, the opening and closing operations parts also can adopt other structures such as knob shaped or round handle shape.

Also have, handle and protection department are not to be integrally formed, and can adopt the protection department with split to be connected the structure on the handle yet, perhaps can adopt the structure beyond the structure that the halfbody housing is made up yet.

Have again; In the above-described embodiment, though be that example is illustrated with the structure that supplies water to turning cylinder, the present invention is applicable to the situation of other fluids such as grinding agent or remover; The present invention is not limited to disk sander, also applicable to other electric tools such as grinders.

Claims

1. electric tool; Extend back at the rear portion that its receipts are equipped with the housing of motor and to be provided with the linearly handle of shape; Have the functional units such as switch that make said motor break-make electricity on the lower surface of this handle; The front portion of the above-mentioned housing of above-mentioned electric tool has the turning cylinder of the instrument that is equipped with that is rotated by above-mentioned motor-driven, and above-mentioned electric tool also comprises: fluid supply tube; Valve when the opening and closing operations parts are operated, opens and closes the stream in the above-mentioned fluid supply tube by this valve, and the fluid of supplying from above-mentioned fluid supply tube can spray from above-mentioned turning cylinder, it is characterized in that,

Extension is provided with protection department in above-mentioned handle bottom; This protection department is connected to annular around the lower side space of the said handle that comprises the aforesaid operations parts and with this handle; Make the part of above-mentioned fluid supply tube run through this protection department; And receipts are equipped with above-mentioned valve in this protection department, and above-mentioned opening and closing operations parts are projected in the above-mentioned lower side space.

2. electric tool according to claim 1 is characterized in that,

In above-mentioned lower side space, the position after above-mentioned opening and closing operations parts are arranged on and lean on than aforesaid operations parts.