CN1293102A

CN1293102A - Jigsaw, especially precision cutting saw

Info

Publication number: CN1293102A
Application number: CN 00131484
Authority: CN
Inventors: H·施维策尔
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1999-10-19
Filing date: 2000-10-19
Publication date: 2001-05-02
Also published as: JP2001158002A; GB0025191D0; DE19950157A1; GB2357058A

Abstract

A stroke saw, in particular a precision cutting saw, has an exchangeable reciprocable saw blade (15), with a rectilinearly extending saw blade back (25) and, opposite to the latter, a series of outwardly directed saw teeth (26), along an edge (27) which is curved convexly outwards substantially along its entire length, wherein said edge (27) along the entire curved region is provided with saw teeth (26).

Description

Scroll saw, especially precision cutting saw

The present invention is a kind of by claim 1 scroll saw as described in the preamble, especially precision cutting saw.

With regard to known a kind of scroll saw arranged according to DE19756766A1, its saw blade general design shape that meets at right angles, it is linearly on one side and roughly parallel with the saw blade back of the body wherein to have a saw blade that points to outer sawtooth.Because this structure of saw blade, thereby this scroll saw and be not suitable for or only be suitable for conditionally making and flush otch or separating cut and small incision.Flushing the danger that just has damage heelpiece surface when when cutting or cutting are next to be placed on a workpiece on the heelpiece.The problem that exists also comprises the otch that for example will make in plate workpiece, for example within sheet member.Cutting beginning and when starting the guiding of saw blade less relatively.Therefore it is just very difficult to make an accurate otch.When sinking to sawing, always make with some sawtooth stands under load, thereby they are comparatively speaking just by rapid blunt.

According to DE-29501708 U1 is known a kind of scroll saw arranged, an end of its saw blade is a pinching end, can be inserted in the clamping seats of saw, and play saw blade thus and freely stretch out in a longitudinal direction.Saw blade has the linearly saw blade back of the body of shape of a saw blade tip from pinching end to the front.On the one side of standing erect, having one to arrange the sawtooth of point backward with saw blade.Simultaneously, this position of roughly being played and pointed to the saw blade tip by pinching end makes linearity and is furnished with sawtooth.And then there is one one position outside the saw blade tip is arch at this straight line position, and it equally also has a gang saw tooth.This layout is very accurate, thereby makes incision when having at least a sawtooth that is arranged in crooked position peak place to be used to sink to cutting.The shortcoming of the saw blade of same this saw is that guiding is insufficient, and cut quality when consequently this scroll saw can not satisfy is especially to the high requirement of the linearity that will make otch.

The present invention with the described feature of claim 1 compared with prior art has the following advantages: can reach high cut quality, especially linearity when cutting.By curved cutting edges in a longitudinal direction, that is to say that curved cutting edges just may be flushed otch and separating cut and small incision accurately on whole saw blade length.Because the shape of this bending just can be cut the jut of workpiece down with flushing, be placed on the upper surface that also can not damage heelpiece on the heelpiece even work as workpiece.Small incision that is to say at the narrow grooving and the separating cut of for example plate workpiece just passablely too, that is to say, and the sawing of such workpiece, and also these sawings can have good cut quality, and can realize the cutting of rule this moment.Because cutting edge be crooked in a longitudinal direction, thereby does not just exist the independent stand under load that sinks to sawtooth when cutting when small-sized cutting, and thereby avoided the too fast blunt of sawtooth.

Just may obtain other scheme of the described scroll saw of claim 1 and improve structure by measure cited in other claim.

Below with reference to the accompanying drawings one embodiment of the present of invention are described in detail.Be depicted as:

Fig. 1 has represented to insert the three-dimensional sketch of the scroll saw of saw blade.

Fig. 2 represents to be used for the three-dimensional sketch of the saw blade of saw shown in Figure 1.

Fig. 3 is illustrated in when making a separating cut that flushes the three-dimensional sketch corresponding to the scroll saw of Fig. 1.

Fig. 4 is illustrated in when making a small incision the three-dimensional sketch corresponding to the scroll saw of Fig. 1.

The Hand saw tool of representing in Fig. 1 stereogram is designed to scroll saw 10, and with its embodiment as electric hand tool.Saw 10 have one rectangular, be designed to facility shell 11 and a head 12 of handle portion simultaneously, and there is a contraction section 13 that improves operation at the intermediate location place between facility shell 11 and head 12.

Usually 11 li of casings a still unshowned electric driver is arranged, it can drive the saw blade of a side that remains in head 12 by means of clamping device 14 and realize reciprocal oscillating motion.In head region 12 a unshowned transmission device is arranged, the armature spindle of it and drive motors is connected, and has a right angle to point to the unshowned output shaft of armature spindle, and drives the link gearing that can't see so that saw blade 15 motions through this.

Saw blade 15 is contained in the guided way 16 and vertically can moves, and guided way 16 constitutes an independent preferably inseparable construction unit therewith, and its planform is a kind of saw blade box 17, and it can clamp clamping device 14 the insides into facility shell 10.

Guided way 16 is designed to the linearity part, and two

guide legs

18 and 19 on the two sides that are positioned at saw blade 15 are arranged, these two legs are interconnected to a part through bending seamed edge 20, perhaps are not like this, but make two independently part and subsequently along the longitudinal seamed edge be connected with each other.Saw blade 15 for example remains on 16 li of guided ways usually and vertically realizes guiding with limitation movably by means of two longitudinal centre lines with respect to saw blade box 17 are the pin/groove connector of symmetric arrangement.For saw blade box 17 being clamped in 14 li of saw 10 clamping devices, clamping element, its shape are arranged for example is connecting

plate

21,31 in design on guided way 16.Clamping device 14 comes work by the principle that slides connection (Prinzip einer Skibindung) usually.Clamping device 14 also has the latching that can not see fully, and when saw blade box 17 was packed into, this latching was with regard to engaging-in one 22 li in hole that is arranged on guided way 16 two sides.The link gearing that drives saw blade 15 has a sightless trundle, and it is in transmission connection with formation for 24 li by the vacancy that a slotted hole 23 on guided way 16 two sides is engaged to saw blade 15.

By guided way 16 with remain on above this not discardable but saw blade box 17 that saw blade 15 that can be along the longitudinal movement is formed and can change, and the clamping device 14 by means of saw is can be securing on being installed to saw 10 time, meanwhile also just make saw blade 15 with this back and forth the described transmission device of reciprocally swinging transmission link.The hump 25 of saw blade 15 is stretched on the longitudinal direction of guided way 16, and wherein saw blade 15 or can exceed this guided way 16 perhaps can flush substantially with guided way.

Saw blade 15 has a row and points to outer sawtooth 26 on the face-off face of the saw blade back of the body 25 and at Fig. 1 on the following face of 3 and 4 li formations.This following face is also promptly seen from an end to the other end of saw blade 15 all to be outside convex curved on the longitudinal direction of saw blade 15, and on whole arch turn of bilge position sawtooth 26 is arranged basically on its whole length.This arch lug is represented with 27.It can advantageously roughly be arch corresponding to an arc section and change.25 of the saw blade back ofs the body that linearly changes can be roughly corresponding to a secant of this circular arc.

Fig. 3 Succinct representation the saw 10 of precision cutting saw pattern be applied in cutting with flushing and separate the workpiece 29 that is placed on above the heelpiece 28, for example a lath in other words.Outwards protrude and arch upward owing to have the limit 27 of sawtooth 26 this moment obviously, therefore part such as workpiece 29 that just may the sawing projection, and can not damage heelpiece 28 simultaneously.

When Fig. 4 represents that same scroll saw 10 is applied in a kind of plate workpiece 30, thin plate for example, will cut an otch 32 this moment, also is a kind of small incision.If not otch 32 so also can make plate workpiece 30 part leave with remainder, and thereby form a separating cut.Because saw blade 15 is in 16 li guiding of guided way, thereby saw blade 15 just has good guiding.Therefore not only adding man-hour, and can realize high cut quality man-hour adding, so just can satisfy, especially for the high requirement of linearity for cut quality by Fig. 4 by Fig. 3.Existing a plurality of sawtooth 26 participation effects by beginning cutting processing shown in Figure 4 the time, thereby load is distributed on these a plurality of sawtooth 26.Lead well for this reason and owing to having adopted guided way 16 to make, thereby just may for example when cut 32, form a very well-behaved otch.When carrying out small-sized cutting, saw and to remain on the position of level.Therefore opposite with the rule saw danger that does not just have bounce-back.The operation of scroll saw 10 all is simple under all these situations.

Claims

1. scroll saw, especially precision cutting saw, it has saw blade (15) removable, that can back and forth drive back and forth, the saw blade back of the body (25) that saw blade has a linear to stretch, and the sawtooth (26) of a row outside pointing to arranged on the following face (27) of its face-off, it is characterized in that the following face (27) of saw blade all arches upward to evagination on whole length basically, wherein this following face (27) all is provided with sawtooth (26) at whole arcuate part.

2. by the described scroll saw of claim 1, it is characterized in that the arch limit (27) that is provided with sawtooth (26) roughly is arch corresponding to an arc section and changes, and this saw blade back of the body (25) roughly changes corresponding to the secant of circular arc.

3. by claim 1 or 2 described scroll saws, it is characterized in that, saw blade (15) remains on a longitudinally extending guided way (16) lining and leads movably, guided way then can be fixed on a clamping device (14) lining, and make simultaneously saw blade (15) with one back and forth the transmission device that drives of reciprocally swinging link.

4. by the described scroll saw of claim 3, it is characterized in that saw blade (15) and guided way (16) have constituted a saw blade box (17) as a unit.

5. by claim 3 or 4 described scroll saws, it is characterized in that guided way (16) is stretched the wide facial position of the both sides of the position that reaches the saw blade back of the body (25) and saw blade (15) near the saw blade back of the body, and as guiding.

6. by described scroll saw one of in the claim 3 to 5, it is characterized in that the saw blade back of the body (25) of saw blade (15) has exceeded guided way (16) in a longitudinal direction or flushed with it basically.

7. be used for the especially saw blade of precision cutting saw of scroll saw (10), this saw blade is described by the preamble of claim 1, it is characterized in that the bottom (27) of saw blade (15) outwards protrudes basically and is curvedization of arch, and is provided with sawtooth (26) at whole arcuate part on whole length.

8. by the described saw blade of claim 7, it is characterized in that the arch limit (27) with sawtooth (26) row roughly is equivalent to an arc section and changes, and the saw blade back of the body (25) roughly is equivalent to one section secant of this circular arc.

9. by claim 7 or 8 described saw blades, it is characterized in that, the saw blade back of the body (25) position of saw blade (15) remains on guided way (16) lining and can relatively move, and just can make saw blade (15) be fixed on a clamping device (14) lining of a scroll saw (10) with this guided way; And make simultaneously saw blade (15) with one back and forth the transmission device that drives of reciprocally swinging link.

10. by described saw blade one of in the claim 7 to 9, it is characterized in that guided way (16) is stretched the wide facial position of the both sides of the position that reaches the saw blade back of the body (25) and saw blade (15) near the saw blade back of the body, and as guiding.