WO2010020458A1

WO2010020458A1 - Tool

Info

Publication number: WO2010020458A1
Application number: PCT/EP2009/058269
Authority: WO
Inventors: Roland Hoefs
Original assignee: Robert Bosch Gmbh
Priority date: 2008-08-21
Filing date: 2009-07-01
Publication date: 2010-02-25
Also published as: DE102008041425A1

Abstract

The invention relates to a tool, particularly a sawing tool (12b), comprising a base body (14b), which comprises at least one fastening means (16b) and at least one working surface (18b). It is proposed that the base body (14b) comprise at least one concentrated mass area (20b) arranged relative to a center point (22b) of the fastening means (16b) at an area (24b) of the base body (14b) opposite the working surface (18b).

Description

ROBERT BOSCH GMBH; D-70442 Stuttgart

Tool

State of the art

The invention is based on a tool according to the preamble of claim 1.

A tool has already been proposed which has a base body with at least one fastening means and at least one working surface.

Advantages of the invention

The invention is based on a tool, in particular a sawing tool, with a base body which has at least one fastening means and at least one working surface.

It is proposed that the base body has at least one concentrated mass range which, with respect to a center of the fastening means, is arranged on an area of the base body opposite the working surface. In this context, a "main body" should be understood to mean, in particular, a body which preferably constitutes a main component of the tool and which thus defines, in particular, a shape and / or a shape of the tool Bulge and / or in particular a recess, to be understood, which is intended to attach the tool in particular to a hand tool, in particular releasably, which is to be understood here by "provided" specially equipped and / or designed preferred to a recording of a R.324032

Tool housing, which is arranged on an output shaft of the power tool. Furthermore, a "surface" is to be understood in particular as meaning a surface of the tool, such as a cutting edge, which serves to machine a workpiece and / or which has a specially designed surface, such as a surface with a saw profile or cutting profile The shape of the basic body is preferably substantially rectangular and it has the working surface at one end of an axial main extension of the basic body, but another form which appears appropriate to a person skilled in the art would also be conceivable Bimetal and / or another material that appears appropriate to the person skilled in the art In this connection, under a "concentrated mass range", in particular a region of the

Basic body are understood, which has a length and / or a width, which has a different mass and in particular a larger mass compared to at least one other area with the same length and / or width, wherein one length is an extension in the main direction of extension of the tool and a width is to be understood to mean an extension perpendicular to the main extension direction and / or that is intended to displace an overall center of gravity of the tool in a direction of the tool receptacle. The concentrated mass range is preferably located near the center of the fastener, where "near" defines a distance of an end of the concentrated mass opposite the working surface from the center of the fastener, which is advantageously less than 60 mm, preferably less than 30 mm and especially advantageous smaller than

20 mm. An end of the concentrated mass pointing in the direction of the working surface can also be arranged in a region which lies on the side of the fastening means pointing in the direction of the working surface. Furthermore, the concentrated mass range is intended to minimize an imbalance of the tool, which arises in at least one working operation of the tool and causes the vibrations of the tool. Furthermore, a "tool" is to be understood as meaning any tool which appears to the person skilled in the art to be suitable for machining, in particular for sawing machining of a workpiece, however, the present invention can be used particularly advantageously for sawing tools which are oscillated in one plane , which is arranged substantially perpendicular to the output shaft of the power tool, are driven

Embodiment can be provided a balanced operation in the tool, with the addition of a precise work result or a specific cut in the workpiece can be achieved. In addition, a moment of inertia may be selectively increased in a main axis of inertia extending parallel to the output shaft of the power tool. R.324032

Advantageously, the concentrated mass range is designed with a denser mass than at least one region of the main body. In this context, a "denser mass" should be understood to mean, in particular, a mass whose mass per volume is greater than one mass per volume of the region of the main body of the fastening means, on which the working surface facing side of the base body is arranged. By means of the embodiment with a denser mass, the concentrated mass range can advantageously be designed to save space.

Furthermore, it is proposed that the concentrated mass range is formed by a thickened region. In this context, a "thickened area" should be understood to mean, in particular, an area which is at least thicker than the area which, relative to the center of the fastening means, is disposed on the side of the base body facing the working surface "defines here that the area is at least made thicker than a height and / or a width of the base body, wherein a height and / or width is determined in each case by an axis which extends perpendicular to the axial main extension of the tool. The height and / or the width is at least 1.5 times and preferably 2 times to 4 times as thick or as wide as the side facing the working surface. By implementing the thickened region, the concentrated mass range can be realized in a structurally simple manner.

It is also proposed that the concentrated mass range is integrally formed with the main body. In this context, the term "integral" is understood in particular to mean that the concentrated mass range, in particular before a manufacturing process of the

Tool was firmly integrated into the body and / or was connected to this and / or forms an inseparable unit with this and / or forms a concrete component with this and / or in particular with this in one cast and / or only with loss of function of a good Balancing the tool can be separated from the body. Due to the one-piece configuration of the concentrated mass range with the main body, the tool can be produced in a particularly cost-effective and component-saving manner.

Furthermore, it is proposed that the concentrated mass range is formed by a forming process on the main body. Here, a "forming process" defines that a component R.324032

or a region and in particular the region of the base body facing away from the working surface in the production process of the tool is selectively plastically brought into another shape. In this context, a "forming process" is to be understood as meaning, for example, deep-drawing and / or in particular extrusion and / or folding and / or clinching, but other forming processes which appear to be suitable for a person skilled in the art are also conceivable the concentrated mass range by means of a forming process can advantageously be achieved a faster throughput in the production of the tool.

Furthermore, it is advantageous if the concentrated mass range is formed at least by a further component. A "further component" is to be understood here in particular as a component which can be detachably and / or permanently connected to the main body of the tool and / or is and / or is a separate or independent component from a production process of the tool The design according to the invention makes it possible to provide a particularly variable production of the tool, which can be specially adapted to a field of application of the tool.

Furthermore, it may be advantageous if the further component is formed from a different material as the main body. In this case, a "different material" should be understood to mean, in particular, a material which in particular has at least one other properties of the material with regard to at least one parameter, such as a strength, a purity, a temperature resistance, a toughness, a mass, a conductivity, This material could, for example, have a greater density than the bimetal and / or iron or steel used and / or another material that appears appropriate to the person skilled in the art By manufacturing the other component from a different material, a space-saving design of the tool can be achieved.

In a further embodiment of the invention it is proposed that the further component is connected to the main body by a material connection. In this case, the further component may be connected to the main body by all cohesive connection types which appear meaningful to a person skilled in the art, such as gluing, sintering, brazing, injection molding, pressing, vulcanization, molding and / or welding. Due to the material connection, a structurally simple connection type can be provided. R.324032

It is also proposed that the further component is connected to the main body by welding, whereby a particularly stable attachment can be achieved.

In addition, it is proposed that the further component is connected to the main body by a positive fit, wherein here all, the skilled person appears to be appropriate detachable and non-releasable form-locking connection types, such as a node, a riveting, a pinning, a screw and / or in particular an enforce joining to a connection of the further component and the base body be conceivable. By means of the positive connection, a particularly stable connection between the further component and the base body can be realized, which can be made particularly strong, secure and durable in particular by the connection by means of clinching.

In a further embodiment of the invention, a hand tool machine with a tool is proposed, wherein the use of the tool would basically be conceivable for all hand tool machines that would appear to be useful to the person skilled in the art and, in particular, for a multi-function tool.

drawing

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 shows a hand tool with a tool according to the invention,

2 shows the tool of Figure 1 with a concentrated mass of another material in a sectional view from the side, Fig. 3 shows the tool of Figure 2 in a view from above, R.324032

4 shows an alternative embodiment of the tool with a concentrated mass formed by pressing in a sectional view from the side,

5 shows an alternative embodiment of the tool with a concentrated mass formed by folding in a sectional view from the side,

Fig. 6 shows a further alternative embodiment of the tool with a welded-on concentrated mass in a sectional view from the side and Fig. 7 shows a fourth alternative embodiment of the tool with a means

Push through attached concentrated mass in a sectional view from the side.

Description of the embodiments

FIG. 1 shows a hand tool 32a in the form of a multi-function tool 34a with an electric motor 38a arranged in a housing 36a. The electric motor 38a drives, via an eccentric gear 40a, an oscillating drive shaft 42a protruding from the housing 36a. At the end 44a protruding from the housing 36a, the drive shaft 42a has a tool receptacle 46a, on which a tool 10a can be fixed in a rotationally fixed manner. For this purpose, the tool holder 46a protrudes into a recess 48a of the tool 10a, which serves as a fastening means 16a of the tool 10a on the machine tool 32a (see FIG. In operation, the drive shaft 42a oscillates oscillatingly a few degrees about its axis 50a, whereby the tool 10a is driven in a direction 52a in a plane 52a extending substantially perpendicular to the drive shaft 42a with an oscillating pivotal movement.

FIG. 2 shows the tool 10a, which is designed as a sawing tool 12a. The tool 10a has a substantially rectangular base body 14a, which, as can be seen in Figure 3, which shows the tool 10a in a view from above, two parts 56a, 58a, which are connected to each other by means of screws 60a. Furthermore, the part 58a has a shoulder 62a, over which an end portion 64a, which forms a saw blade 66a, is offset parallel with respect to the fastening means 16a with the tool 10a mounted on the hand tool 32a in the direction of the end 44a of the drive shaft 42a. The tool 10a has an approximate R.324032

Overall length in its axial main extension 68a of about 100 mm and an approximate width 78a in a direction 70a, which extends perpendicular to the main extension 68a, of about 40 mm.

In the base body 14a or in part 58a, the fastening means 16a and the recess 48a is arranged. At an end 72a of the main body 14a or the part 56a and the saw blade 66a pointing away from the shoulder 62a, there is a working surface 18a extending substantially perpendicular to the axial main extension 68a of the tool 10a, in the form of a cutting edge 74a for machining a workpiece 76a, trained. Furthermore, the base body 14a has a concentrated mass area 20a, which with respect to a center 22a of the

Fastener 16a is disposed on a working surface 18a opposite portion 24a of the base body 14a, wherein the center point 22a of the fastening means 16a is located on the axis 50a of the output shaft 42a.

The region 24a opposite the work surface 18a extends over the entire width 78a of the main body and also beyond lateral regions 80a of the main body 14a beyond the center 22a of the fastening means 16a, the lateral regions 80a in the direction 70a adjoining the recess 48a in a direction pointing to the working surface 18a direction, which extends along the axial main extension 68a of the tool 10a, erstre- (see Figures 1 and 3). In principle, however, it would also be conceivable that only in a partial region 82a of the region 24a, as indicated hatched in FIG. 3, is the concentrated mass region 20a 'arranged, or that the lateral regions 80a approach the working surface 18a only minimally over one extend in the direction of one of the working surface 18a opposite end 84a of the concentrated mass portion 20a oriented edge of the recess 48a (see also Figures 6 and 7).

The concentrated mass area 20a or the area 24a is arranged in a vicinity of the center point 22a of the fastening means 16a or a distance of the end 84a of the concentrated mass area 20a to the center point 22a of the fastening means 16a is approximately 20 mm, which is in the direction of the working surface 18a facing end 86a of the concentrated mass range

20a is disposed in a region which lies on the side 88a of the fastening means 16a pointing in the direction of the working surface 18a (see FIG. 3). R.324032

The concentrated mass region 20a is formed by a further component 30a, which is formed from a different material as the main body 14a or from lead. In a manufacturing process, the further component 30a is connected by a material bond and / or by a positive connection with the main body 14a. In principle, however, a connection by means of a force closure would be conceivable.

In addition, the concentrated mass region 20a is designed with a denser mass than at least one region 26a of the main body 14a, which, relative to the center point 22a of the fastening means 16a, is arranged on a side 90a of the main body 16a facing the working surface 18a. In this case, the region 26 has the same length in the main extension direction 68a as the concentrated mass region 20a or the component 30a. In addition, in general, it would also be conceivable that the concentrated mass region 20a is formed by a thickened region. Due to the concentrated mass region 20a, a fictitious center of gravity 92a of the tool 10a, which is located on a side 90a of the main body 14a in the case of a tool without a concentrated mass region, is displaced in the direction of the fastening means 16a or its center 22a to the real total center of gravity 94a by a difference 96a , As a result, an imbalance of the tool 10a, which arises in a working operation of the portable power tool 32a or of the tool 10a and causes the vibrations of the tool 10a, can be minimized. Thus, the work surface 18a can saw a concrete cut 98a in the workpiece 76a.

FIGS. 4 to 7 show alternative embodiments of the tool 10a. Essentially, the same components, features and functions are always numbered the same. To distinguish the embodiments, however, the reference numerals of the embodiments, the letters a to e are added. The following description is essentially limited to the differences from the exemplary embodiment in FIGS. 1 to 3, wherein reference can be made to the description of the exemplary embodiment in FIGS. 1 to 3 with regard to components, features and functions remaining the same.

FIG. 4 shows an alternative embodiment of the tool 10a in a sectional view from the side. The tool 10b, which is designed as a sawing tool 12b, has a base body 14b, in which a fastening means 16b or a recess 48b is arranged. Furthermore, the base body 14b forms a saw blade 66b, at one end 72b of which a working surface 18b extending substantially perpendicular to an axial main extension 68b of the tool 10b, in the form of a cutting edge 74b for machining a workpiece, is formed R.324032

is. In addition, the base body 14b has a concentrated mass region 20b, which is arranged relative to a center 22b of the fastening means 16b on a working surface 18b opposite portion 24b of the base body 14b, wherein the center 22b of the fastening means 16b is located on an axis 50b of an output shaft, not shown , The concentrated mass region 20b is formed by a thickened region 28b and is thereby designed with a denser mass than a region 26b of the main body 14b, which is arranged relative to the center point 22b of the fastening means 16b on a side 90b of the main body 14b facing a working surface 18b , The thickened region 28b is made approximately twice as thick as a material thickness or a height 100b in the region 26b of the main body 14b and extends symmetrically in a direction 102b around the height 100b of the main body 14b, moreover it extends over lateral areas 80b around the recess 48b in the direction of the working surface 18b to over the center 22b. In principle, however, it would also be conceivable that at the same height of the region 24b, a width 78b of the region 24b in the direction 102b is wider than a width of the region 26b (not shown). The concentrated mass region 20b is integrally formed with the base body 14b and molded onto the base body 10b by means of extrusion molding, in particular during the production process of the tool 14b. Due to the concentrated mass region 20b, an overall center of gravity 94b of the tool 1 Ob is displaced in the direction of the center point 22b of the fastening means 16b with respect to a fictitious center of gravity 92b of a tool without the concentrated mass region 20b as viewed from the working surface 18b.

FIG. 5 shows a further alternative embodiment of the tool 10a in a sectional view from the side. The tool 10c, which is designed as a sawing tool 12c, has a base body 14c with a fastening means 16c or a recess 48c and a saw blade 66c, with a working surface 18c, in the form of a cutting edge 74c. In addition, the base body 14c has a concentrated mass region 20c, which, relative to a center 22c of the fastening means 16c, is arranged on a region 24c of the base body 14c which is opposite the working surface 18c. The concentrated mass portion 20c is formed by a thickened portion 28c and thereby made denser than a portion 26c of the main body 14c relative to the center 22c of the fastener

16c is arranged on a working surface 18c facing side 90b of the base body 14c. The thickened region 28c is approximately 4 times as thick as a material thickness or a height 100c in the region 26c of the main body 14c and is formed by a wave-shaped formation 104c, which is symmetrical in a direction 102c about the height 100c of the main body R.324032

14c extends. In general, an asymmetrical arrangement and / or any other shaping of the formation 104c that appears appropriate to the person skilled in the art would also be conceivable. The concentrated mass range 20c is integrally formed with the main body 14c and formed by a forming process and especially in the manufacturing process of the tool 10c by means of folding on the main body 14c. As with the tools 10a and 10b, an overall centroid 94c of the

Tool 10 c relative to a fictitious center of gravity 92 c of a tool without the concentrated mass range 20 c in the direction of the center point 22 c of the fastener 16 c shifted.

FIG. 6 shows a third alternative embodiment of the tool 10a in a sectional view from the side. A base body 14d of the tool 10d, which is designed as a sawing tool 12d, has a fastening means 16d or a recess 48d and at one end 72d of a saw blade 66d integrated in the base body 1d a substantially perpendicular to an axial main extension 68d of the tool 10d Work surface 18 d, in the form of a cutting edge 74 d on. In addition, the base body 14d has a concentrated mass region 2Od, which, relative to a center point 22d of the fastening means 16d, is arranged on a region 24d of the base body 14d opposite the working surface 18d. The tool 1 Od differs from the tool 1 Ob in that the concentrated mass region 2Od is formed by a further component 30d, which is connected to the main body 14d by a material bond and in particular by welding. The further component 30d may be formed from the same material as the base body 14d, but it would also generally be possible to form the further component 30d from a different material as the base body 14d. Here, too, an overall center of gravity 94d of the tool 1Od is displaced in the direction of the center point 22d of the fastening means 16d.

FIG. 7 shows a fourth alternative embodiment of the tool 10a in a sectional view from the side. The tool 10e, which is designed as a sawing tool 12e, has a main body 14e with a fastening means 16e or a recess 48e and a working surface 18e, which is arranged at one end 72e of a saw blade 66e integrated in the main body 14e. Furthermore, the main body 14e has a concentrated mass region 2Oe, which, relative to a center 22e of the fastening means 16e, is arranged on a region 24e of the main body 14e which is opposite the working surface 18e. The tool 10e differs from the tool 10d of the embodiment of FIG. 6 in that a further component 30e, which represents the concentrated mass region 2Oe, is connected to the main body R.324032

14d is connected by a positive connection and in particular by a penetration joints. The further component 30e is formed by an angled component 106e whose end 108e remote from the working surface 18e passes through a recess 11 Oe of the base body, which is arranged in the region 24e, through the process of clinching. As with the previously described embodiments, the concentrated mass range 2Oe displaces a center of gravity 94e of the tool 10e toward the center 22e of the fastener 16e.

Claims

R.324032ROBERT BOSCH GMBH; D-70442 Stuttgart claims

1. tool, in particular sawing tool (12a-e), with a base body (14a-e), the at least one fastening means (16a-e) and at least one working surface (18a-e), characterized in that the main body ( 14a-e) has at least one concentrated mass region (20a-e) which, relative to a center (22a-e) of the fastening means (16a-e), is located on a region (24a-e) of the base body opposite the working surface (18a-e) (14a-e) is arranged.

2. Tool according to claim 1, characterized in that the concentrated mass range (20a-e) is designed with a denser mass than at least one region (26a-e) of the base body (14a-e).

3. Tool according to claim 1 or 2, characterized in that the concentrated mass range (20a-e) of a thickened portion (28a-e) is formed.

4. Tool according to one of the preceding claims, characterized in that the concentrated mass range (20b, 20c) with the base body (14b, 14c) is integrally formed.

5. Tool according to claim 4, characterized in that the concentrated mass range (20b, 20c) by a forming process to the base body (14b, 14c) is integrally formed.

6. Tool according to one of the preceding claims, characterized in that the concentrated mass range (20a, 2Od, 2Oe) is formed at least by a further component (30a, 30d, 30e). R.324032

7. Tool according to claim 6, characterized in that the further component (30a, 3Od, 3Oe) of a different material as the base body (14a, 14d, 14e) is formed.

8. Tool according to claim 6, characterized in that the further component (30a, 30d) is connected to the base body (14a, 14d) by a material connection.

9. Tool according to claim 6, characterized in that the further component (30 a, 3 o d) with the base body (14 a, 14 d) is connected by welding.

10. Tool according to claim 6, characterized in that the further component (30a, 3Oe) with the base body (14a, 14e) is connected by a positive connection.

11. Tool according to claim 6, characterized in that the further component (3Oe) is connected to the base body (14e) by a clinching.

12. Hand tool, in particular multi-function tool (34a-e), with a tool (10a-e) according to one of claims 1 to 11.