CN100475467C - Electric tool - Google Patents
Electric tool Download PDFInfo
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- CN100475467C CN100475467C CNB2005100790260A CN200510079026A CN100475467C CN 100475467 C CN100475467 C CN 100475467C CN B2005100790260 A CNB2005100790260 A CN B2005100790260A CN 200510079026 A CN200510079026 A CN 200510079026A CN 100475467 C CN100475467 C CN 100475467C
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Abstract
The electric tool includes a base having an opening portion and a bottom face; a blade being projected downward from the bottom face of the base through the opening portion of the base, the blade being capable of cutting while sliding the bottom face of the base on an upper face of a work piece; a motor driving the blade; a housing accommodating the motor. The bottom face of the base is at least partially coated with a resin including fluorine.
Description
Technical field
The present invention relates to have the electric tool of substrate.
Background technology
To explain a kind of electric tool referring to Fig. 1 and 2 below.Fig. 1 and 2 represents a kind of portable circular saw as the electric tool example, and it is made up of following structure: saw blade 1, the saw blade cover 4 and the substrate 5 that drive saw blade 1 motor rotating 2, hold the shell 3 of motor 2, rotatably keep this saw blade 1.Substrate 5 is in the downside of shell 3 and saw blade cover 4, and has opening portion 5a saw blade 1 can be stretched out below it.Saw blade cover 4 is contained on the shell 3, and substrate 5 is connected on shell 3 or the saw blade cover 4, perhaps is connected on shell 3 and the saw blade cover 4.The power of motor 2 is delivered to saw blade 1 by gear 6 or similar means, drives saw blade 1 rotation.
As the material of substrate 5, generally use die casting aluminium, die casting magnesium, duroplasts, iron plate or similar material, its surface is through electroplating processes, or the former state of maintenance material itself.
When operator's use has the portable circular saw of structure shown in Figure 7, the operator tightly contacts work piece 7 with substrate 5 by the bottom surface that makes substrate 5 on work piece 7, meanwhile promote portable circular saw forward and make substrate 5 slip on work piece 7 along cut direction, thus cutting work piece 7.
Summary of the invention
Electric tool according to above-mentioned prior art, can produce the work piece of high tack dust when cutting, for example during plasterboard, substrate 5 is being moved forward electric tool when being pressed on the work piece 7, the dust that work piece has flown out when having deposited cutting, therefore on the bottom surface of dust attached to substrate 5, thereby hindered the slip of the bottom surface of substrate 5.The burden that promotes portable circular saw forward becomes heavy, thereby brings the problem of operability worsens.Electric tool can not travel forward, and can not cut work piece.
An object of the present invention is,, also do not reduce the electric tool of operability even provide a kind of when cutting can produce the work piece of high tack dust.
Above-mentioned purpose is to be difficult to be attached in the substrate and to be difficult to hinder a kind of structure of the slip of substrate bottom surface to realize by dust.
According to one aspect of the invention, a kind of electric tool is provided, comprising: substrate with opening portion and bottom surface; Stretch out and pass the blade of the opening portion of substrate downwards from the bottom surface of substrate, this blade can cut when sliding on the upper surface of the bottom surface of described substrate at work piece; Drive the motor of this blade; And, hold the shell of this motor.First inclined-plane or cambered surface partly are formed on substrate along between the bottom surface of the front end face of cut direction and described substrate, and fluoropolymer resin layer is formed on the surface of the bottom surface of described substrate and described first inclined-plane or cambered surface part.
By such structure, even when cutting can produce the work piece of high tack dust, dust also is difficult to be attached to the bottom surface of substrate, and does not hinder the slip of substrate bottom surface, thereby prevents the decline of operability.
Description of drawings
Fig. 1 is the perspective view of electric tool according to an embodiment of the invention;
Fig. 2 is the cutaway view according to the electric tool of this embodiment;
Fig. 3 is the front view according to the substrate of the embodiment of the invention;
Fig. 4 is the side view according to the substrate of the embodiment of the invention;
Fig. 5 is the front section view according to the major part of the substrate of the embodiment of the invention;
Fig. 6 is the side sectional view according to the major part of the substrate of the embodiment of the invention;
Fig. 7 is the perspective view of expression electric tool cutting operation state;
Fig. 8 is the cutaway view of electric tool according to an embodiment of the invention;
Fig. 9 is a flow chart of making the step of electric tool according to the embodiment of the invention;
Figure 10 is the perspective view of electric tool according to an embodiment of the invention;
Figure 11 is the perspective view of electric tool according to an embodiment of the invention;
Figure 12 represents the amplification view of the major part of electric tool shown in Figure 11 according to an embodiment of the invention;
Figure 13 is the cutaway view of electric tool according to an embodiment of the invention;
Figure 14 is the cutaway view of electric tool according to an embodiment of the invention;
Figure 16 represents the amplification view of the major part of electric tool shown in Figure 15 according to an embodiment of the invention;
Figure 17 represents the amplification view of the major part of electric tool shown in Figure 15 according to an embodiment of the invention;
Figure 18 is the perspective view of guiding parts embodiment according to an embodiment of the invention;
Figure 19 is the perspective view of another embodiment of guiding parts;
Figure 20 is the perspective view of electric tool embodiment according to an embodiment of the invention;
Figure 21 is the perspective view of another embodiment of electric tool according to an embodiment of the invention.
Figure 22 is the perspective view of electric tool according to an embodiment of the invention.
The specific embodiment
Be the embodiment that example is explained electric tool below with the portable circular saw.
As shown in Figure 8, the material 5d of substrate 5 is made by die casting aluminium, and its whole surface-coated has fluorine resin 8, and dust or analog are difficult to adhere in the above, and have low-friction coefficient.Therefore, even when the bottom surface of substrate 5 closely contacts work piece 7 and slides in the above, dust also is difficult on the bottom surface attached to substrate 5, and therefore sliding not can variation, and the situation of maintenance when bringing into use with the bottom surface is the same, and operability does not descend.
Though the bottom surface of substrate 5 is designed to flat shape significantly, can cut work piece 7 and slip glossily in the above.Send squeak but suppress substrate 5 when being pressed onto on the work piece 7 for the bottom surface in substrate 5, shown in Fig. 3,4, from the bottom surface, bottom surface central authorities are more or less recessed, that is, its outward flange is made more or less projection.And, for can be on work piece 7 smooth slip and not being stuck, shown in Fig. 3 to 6, the inward flange of the outward flange of the end face of substrate 5 and bottom surface and opening portion 5a is connected with inclination angle 5b with the bottom surface.
By connecting along the front end face and the bottom surface of the substrate 5 of cut direction with inclination angle 5b, when substrate 5 when cut direction travels forward, the front end face that can prevent substrate 5 is blocked by the kick on the described work piece 7 or analog and can not slide along cut direction, perhaps prevents to be coated in suprabasil fluorine resin and peels off in early days owing to be stuck.
In addition, when the beginning cutting operation, make the annular saw main body crooked when carrying out cutting operation with respect to the upper surface of work piece 7 through being everlasting, and, make the upper surface of substrate 5 and work piece 7 parallel to each other gradually by near the bottom surface of the upper surface upper edge of work piece 7 cut direction slide base 5 fore-end; By the front end face of substrate 5 in cut direction being connected with the bottom surface with inclination angle 5b, as mentioned above, can prevent substrate 5 in the concentrated wear of the angle part of cut direction front side, prevent that fluorine resin is stripped from early days.And, by at bottom surface, the inclination angle 5b of substrate 5 with on end face, apply fluorine resin, can prevent further that fluorine resin is stripped from cut direction.
In addition, by being connected with the bottom surface of substrate 5 opening portion 5a similarly in the inward flange of cut direction rear side part, as shown in Figure 5, can prevent that opening portion 5a from being blocked by the kick on the described work piece 7 or analog and can not slide in the inward flange of cut direction rear side part, perhaps prevent to be coated in suprabasil fluorine resin and be stuck in early days and peel off.
And, when the cutting to work piece 7 finishes, the main body of annular saw is upwards drawn from work piece 7 upper surfaces, usually the operation of carrying out is that substrate 5 is being slided on the upper surface of work piece 7 along near the bottom surface the rear end face of cut direction, meanwhile make the annular saw main body crooked gradually, and upwards draw the annular saw main body with respect to the upper surface of work piece 7.By forming the structure that substrate 5 is coupled together along the bottom surface of the rear end face of cut direction and substrate 5 by inclination angle 5b, when the cutting of work piece 7 finishes and when upwards drawing described annular saw main body, the part of the annular saw main body of sliding on the upper surface of work piece 7 can be disperseed, and can prevent angle part in substrate 5 bottom surfaces of cut direction rear side by concentrated wear, and prevent that fluorine resin is stripped from early days.
Fig. 9 represents to make the example of the step of electric tool substrate.At first, when beginning,, use the die forming base material in step 101.In step 102, machined, polishing or the like are carried out in the bottom surface of substrate, thereby improve flatness; And carry out bolt hole processing or similar tasks.In step 103, in order to improve the tack of fluorine resin on base material, come the surface that alligatoring will be coated by operations such as sandblasts.In step 104, fluorine resin is coated in the substrate.In this case, can under situation about substrate being hung, do the coating of fluorine resin, so that resin can easily be coated on the whole surface equably to substrate with iron wire or analog.Subsequently, in step 105, the fluorine resin that applies is toasted.
About the coating scope of fluorine resin 8, when fluorine resin 8 only be coated in aforesaid, very closely contact with work piece 7 and during the bottom surface peripheral edge portion of the substrate 5 of sliding, as shown in figure 10, just can reach its effect thereon; Perhaps especially apply when thicker the slip life-span that just can increase this fluorine resin 8 that determines by wearing and tearing when the outer edge part of described bottom surface.
As shown in figure 11, (for example has the meticulous adjustment of energy angle of inclination at portable circular saw or analog, under the situation of the bolt 9 grades angle of inclination of substrate 5 bottom surfaces), when applying fluorine resin 8, as shown in figure 12, if can prevent that fluorine resin 8 from entering bolt hole 5e, just can prevent that bolt 9 from sliding unclamps.
In addition, substrate is hung with iron wire or analog by bolt hole when the coated with resins by substrate 5, just do not need to clamp substrate 5 or analog, thereby can prevent to produce the uncoated part that forms by clamping substrate 5, and resin can easily be coated in the whole substrate 5.
Though when high-temperature baking fluorine resin 8, base material can thermal deformation in baking and produce counter productive such as precise decreasing, by using the low form resin, can widen the heat resisting temperature range of choice of substrate 5 material 5d.And, must make the fusing point that the baking temperature of fluorine resin 8 after applying is lower than base material 5d.
Color by making fluorine resin 8 and the color of base material 5d are approaching, even fluorine resin 8 has flaw and base material 5d to expose, these flaws are also not obvious.
Consider because fluorine resin 8 wearing and tearing that substrate 5 closely contacts with work piece 7 and substrate 5 is slided in the above and caused, by adding in the fluorine resins 8 than the hard pottery of fluorine resin 8 or the powder 10 of analog, as shown in figure 13, even the fluorine resin on surface 8 wearing and tearing, as shown in figure 14, fluorine resin 8 between the powder 10 can not be worn yet, and can continue to play to help sliding effect.
Perhaps, shown in Figure 15,16, when on four angles of the substrate bottom surface that base material 5d weares and teares especially easily, groove 11 being set, as shown in figure 17, even fluorine resin 8 wearing and tearing, it is also little that base material 5d is exposed at surperficial zone, therefore, reduced the adhesion amount of dust, and the sliding variation is restricted.
For example, in portable circular saw, as shown in figure 20, exist and utilize the guide plate 12 shown in Figure 18 and 19, and the situation of accurately cutting work piece 7 with the side of described annular saw along straight line.In this case, if fluorine resin 8 not only is applied on the bottom surface of substrate 5, but also be applied to shown in Figure 18 and 19 on the sliding surface 12a of the guide plate 12 that slides on the work piece 7, also can improve operability by the resistance to sliding that reduces between work piece 7 and the guide plate 12.The sliding surface 12a of guide plate 12 be with substrate 5 sides over against spigot surface, this guide plate 12 is guiding parts.
According to an embodiment of electric tool, fluorine resin also can be coated in the substrate of the keyway planer that is mainly used in cutting, promptly in the face of in the substrate of various timber, as shown in figure 21; Or be coated in mainly various materials are cut in the substrate with the jigsaw of opening or analog, as shown in figure 22.
And, also can utilize Mg alloy formed substrate 5 to reach and make substrate 5 lightweight purposes.In this case, be difficult to accomplish electroplating processes is carried out in substrate 5, and carry out this electroplating processes exactly for the aluminum alloy substrate of prior art.Therefore, improving slidably aspect the property, it is particularly useful to apply fluorine resin in the magnesium alloy substrate.
Claims (8)
1. electric tool comprises:
Substrate (5) with opening portion (5a) and bottom surface;
Stretch out and pass the blade (1) of the opening portion (5a) of described substrate (5) downwards from the bottom surface of described substrate (5), described blade (1) can cut when sliding on the upper surface of the bottom surface of described substrate (5) at work piece;
Drive the motor (2) of described blade (1); With
Hold the shell (3) of described motor (2), it is characterized in that:
First inclined-plane or cambered surface part (5b) is formed on substrate (5) along between the bottom surface of the front end face of cut direction and described substrate (5), and fluoropolymer resin layer (8) is formed on the bottom surface of described substrate (5) and described first inclined-plane or cambered surface partly on the surface of (5b).
2. electric tool as claimed in claim 1, wherein second inclined-plane or cambered surface part (5b) is formed on substrate (5) along between the bottom surface of the rear end face of cut direction and described substrate (5), and fluoropolymer resin layer (8) is formed on described second inclined-plane or cambered surface partly on the surface of (5b).
3. electric tool as claimed in claim 1, wherein between the bottom surface of the 3rd inclined-plane or cambered surface part (5b) the inward flange face that is formed on described opening portion and described substrate (5), and fluoropolymer resin layer (8) is formed on described the 3rd inclined-plane or cambered surface partly on the surface of (5b).
4. electric tool as claimed in claim 1 wherein injects the ceramic powders (10) harder than fluorine resin in described fluoropolymer resin layer (8).
5. electric tool as claimed in claim 1 also comprises:
Guiding parts (12), this guiding parts be connected with described substrate (5) and have with the side of described substrate (5) over against spigot surface (12a), wherein at least a portion of the spigot surface (12a) of this guiding parts (12) is applied by fluorine resin (8).
6. electric tool as claimed in claim 1 wherein provides groove (11) on four angles of the bottom surface of described substrate (5).
7. electric tool as claimed in claim 1 is wherein made the central authorities of described bottom surface recessedly, and the outward flange of described bottom surface is made projection.
8. electric tool as claimed in claim 1 wherein provides the inclination angle that bolt (9) is adjusted described bottom surface in the bottom surface of described substrate (5), and fluoropolymer resin layer (8) is formed on the described bottom surface except described bolt (9).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004176240 | 2004-06-14 | ||
| JP2004176240 | 2004-06-14 | ||
| JP2005115179 | 2005-04-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1715020A CN1715020A (en) | 2006-01-04 |
| CN100475467C true CN100475467C (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100790260A Active CN100475467C (en) | 2004-06-14 | 2005-06-14 | Electric tool |
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| Country | Link |
|---|---|
| CN (1) | CN100475467C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105592991A (en) * | 2013-10-01 | 2016-05-18 | 日立工机株式会社 | Cutting tool |
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- 2005-06-14 CN CNB2005100790260A patent/CN100475467C/en active Active
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| Publication number | Publication date |
|---|---|
| CN1715020A (en) | 2006-01-04 |
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Address after: Tokyo, Japan Patentee after: Machine holding company Address before: Tokyo, Japan Patentee before: Hitachi Koki Company Limited |