EP2974839A1 - Manual cutting machine with two mitre bearings - Google Patents

Abstract

The invention relates to a manual cutting machine (10) having a guide element (20) which can be placed on a base with its underside, in particular a guide plate (21), and a drive assembly (11) which has a drive motor (12) arranged in a machine housing (35) ) and a by the drive motor (12) about a rotation axis (D) drivable tool holder (13) for a cutting tool (14), in particular a saw blade, which is feasible for producing a separating cut in the workpiece in a working direction (A), wherein the drive assembly (11) on the guide element (20) about a to the working direction (A) parallel miter axis (GA) by means of a miter bearing assembly (30) is pivotally mounted in the working direction (A) front miter (31) and a in Working direction (A) rear miter bearing (32) at a longitudinal distance to the front miter bearing (31), at which the drive assembly (11) about the miter axis (GA) schwenkb ar is stored. It is provided that the front miter bearing (31) between the rotational axis (D) of the tool holder (13) and an outer periphery (49) of the separating tool is arranged.

Description

The invention relates to a hand-cutting machine, in particular an electric hand saw or Mauerschlitzfräse with a auflegbaren with its underside guide element, in particular a guide plate, and a drive assembly, which arranged in a machine housing drive motor and driven by the drive motor about a rotation axis Tool holder for a cutting tool, in particular a saw blade, which is feasible for producing a separating cut in the workpiece in a working direction, wherein the drive assembly is pivotally mounted on the guide element about a parallel to the working direction miter axis by means of a miter bearing arrangement, the front in the working direction Miter bearing and a rear in the direction of miter bearing at a longitudinal distance to the front miter bearing comprises, on which the drive assembly is pivotally mounted about the miter axis.

Such hand-separating machines are known, for example, as typical diving circular saws. It is structurally advantageous if the miter bearings have a large longitudinal spacing with respect to the working direction, i. that the drive assembly is arranged with the drive motor between the miter bearings and by the large distance between the miter bearings a secure hold of the drive assembly relative to the plate-like guide element, for example a so-called sawing table is possible.

A disadvantage of such constructions, however, is that the penetration area with which the cutting tool cuts into the workpiece, for example a piece of wood, or an exit area, where the cutting tool from the Workpiece exits, difficult to see. The operator must therefore orient himself to other markings of the saw in order to achieve exact cuts or saw cuts.

On this basis, it is the object of the present invention to provide a manual cutting machine, in particular a hand sawing machine, which is easy to operate.

To solve the problem is provided in a manual cutting machine of the type mentioned that the front miter bearing between the axis of rotation of the tool holder and an outer periphery of the cutting tool is arranged.

The parting tool, which may form part of the hand-held machine tool or hand-cutting machine, is therefore not arranged in the working direction behind the front miter bearing, so that between the miter bearing and the outer periphery of the parting tool, a distance is necessary to the penetration of the cutting tool into the workpiece or To make the exit area of the cutting tool visible from the workpiece. Rather, the front miter bearing is not upstream of the cutting tool in the working direction, but at most arranged laterally directly on the outer circumference or adjacent the outer circumference, so that the penetration of the cutting tool in the workpiece or the outlet area is better visible out.

The inventive hand-cutting machine is compact and easy to use.

The manual cutting machine is preferably a submersible saw or a pendulum hood saw. In principle, the invention is also advantageous for wall slot milling or the like. The manual cutting machine is expediently a power tool. The drive motor is therefore preferably an electric motor. The hand-cutting machine can be battery-operated, so therefore be a hand-ripper with an energy storage. But it is also possible that the hand-cutting machine is network-connected, that is, that they are a connection cable for connection to an electrical supply network. Finally, it should be mentioned only in passing that the construction according to the invention is in principle also suitable for other drive technologies, for example compressed air operated machines.

The guide element is preferably a plate-like guide element, for example a so-called saw table.

An advantageous embodiment of the invention provides that the outer periphery of the separating tool in the region of the guide element projecting in front of the front miter bearing, so that next to or in front of the front miter bearing an area of penetration of the cutting tool into the workpiece or an exit region of the cutting tool from the workpiece from the drive assembly forth , For example, at a portion of the machine housing over, is visible. It is advantageous in this construction, the front miter bearing arranged in the working direction behind the outer periphery of the separating tool, so that its penetration region in the workpiece or its exit region from the workpiece is clearly visible. It is also possible that the machine housing or the drive assembly does not reach all the way to the outer circumference of the working tool or parting tool, so that the penetration area or the exit area is particularly favorably visible.

Advantageously, measures are taken that the penetration of the cutting tool in the workpiece or its exit region from the workpiece is clearly visible. For example, it is advantageous if the guide element, for example a saw table or another guide plate, has a recess through which the penetration area or the outlet area can be seen from above the guide element. But also another arranged above the guide member component of the hand-separating machine, such as the drive assembly, in particular the machine housing, may have a recess. It is also advantageous if the later explained in more detail support arm of a Tiefeneinstelllagers has a recess through which the penetration area of the parting tool into the workpiece or exit area is visible therefrom.

In principle, it is possible that the rear miter bearing is close to the front miter bearing, i. for example, in the direction of work is arranged laterally next to the cutting tool. For example, the rear miter bearing can be arranged on a flat side of the separating tool or next to a flat side of the separating tool. However, it is particularly preferred if the distance between the miter bearings is as large as possible, which allows a particularly stable and, so to speak, widely supported fixing of the drive assembly relative to the guide element. Thus, it is therefore advantageous in this case, when the rear miter bearing is arranged in the working direction behind the outer periphery of the separating tool.

Despite the arrangement behind the outer circumference or next to the outer circumference of the separating tool, the front miter bearing is advantageously as far as possible from the rear miter bearing. It is preferred if the front miter bearing is arranged next to a working direction in the front portion of the cutting tool, which has at least 50% of the radial distance of the outer periphery of the cutting tool from the axis of rotation.

It would also be conceivable, of course, that the front miter bearing in the working direction further back, so for example, approximately centrally between the outer periphery of the cutting tool and rotation axis or even in the rear portion of the cutting tool is arranged close to the axis of rotation.

Advantageously, it is provided that the drive assembly is pivotally mounted on front of an upper side of the guide element projecting bearing elements of the miter bearing assembly with abutment portions about the miter axis. The bearing elements and / or the abutment portions are preferably plate-like bodies or disk-like bodies. Preferably, the counter-bearing sections or bearing elements or both are configured, for example, in the form of circular-segment-like plates or bearing sections. At the bearing elements It is advantageous if these guide slots have, in which at least one slide follower of the abutment portion is guided. Alternatively, of course, a kind of bearing pin and bearing block, in which the bearing pin engages, would be possible as a miter bearing.

The drive assembly expediently has a drive carrier, on which the drive motor and the tool holder are mounted with at least one degree of freedom of movement, for example, pivotable. A linear mobility would also be possible in principle.

With regard to the miter bearing arrangement, for example, the drive assembly is preferably movably mounted, in particular pivotally mounted, with respect to the guide element for setting a sawing depth or depth of cut of the parting tool into the workpiece. Expedient here is the already mentioned drive carrier, which is pivotally mounted on the bearing elements of the guide element about the miter axis and forms the bearing base for the depth adjustment of the drive assembly relative to the guide element, so that the drive motor and the tool holder for setting a sawing depth or depth of cut on the drive carrier, for example are mounted pivotally or linearly displaceable or both.

The drive carrier has, for example, counter-bearing sections which are mounted pivotably about the miter axis on the bearing elements of the miter bearing arrangement projecting in front of the upper side of the guide element.

It is advantageous if at least one bearing element of the guide element, for example a disc-like or plate-like bearing body, penetrates a passage opening of the drive assembly, in particular of the drive carrier. The bearing element can thus protrude to an upper side of the drive carrier or the drive assembly. But it is also a bag or other recesses conceivable, in which engages the bearing body or the bearing element of the guide element. In the bearing element that in drive assembly, in particular engages the drive carrier, it is preferably the bearing element of the front in the direction miter bearing.

It is furthermore preferred if at least one bearing element is more compact than the other. For example, it is advantageous if the bearing element in the front bearing element, that is, that the bearing element of the front miter bearing projecting from the guide element or the guide plate projects less far in front of the top of the guide member than the rear in the direction or other bearing element. This measure contributes to the fact that the front bearing element less hinders the viewing area on the penetration area of the cutting tool into the workpiece or the exit area of the cutting tool from the workpiece.

It is advantageous if the tool holder, in particular the drive assembly as a whole, with respect to the guide element by means of a Tiefeneinstelllagers in a Tiefeneinstellrichtung or Schnitttiefenrichtung between an upper Tiefeneinstellposition and at least one, preferably more and / or continuously adjustable, lower Tiefeneinstellposition is movably mounted. Here again the alternatively possible sliding bearing or swivel sliding bearing is mentioned. Preferably, the Tiefeneinstelllagers in the direction of the front, that is in the area of the front miter bearing.

Now it would be possible that a pivot axis of the Tiefeneinstelllagers in the working direction behind the front miter bearing, so to speak, in height of the cutting tool or laterally next to the cutting tool. Furthermore, it is conceivable that the pivot axis is provided in the region of the rear miter bearing or even behind it, which is advantageous for example in so-called dip circular saws.

In any case, it is preferred if a pivot axis of the Tiefeneinstelllagers outside the longitudinal distance between the miter bearings, for example, in the direction of the front miter bearing. The Tiefeneinstelllager is therefore arranged for example in front of the front miter bearing.

It is advantageous if a penetration region of the separating tool is provided in the workpiece or the outlet region of the separating tool from the workpiece between the pivot axis of the Tiefeneinstelllagers and the front miter bearing. Thus, therefore, the operator can, as it were, look between the depth adjustment bearing and the front miter bearing in order to control the penetration area or the exit area of the separation tool into the workpiece.

A particularly preferred embodiment of the invention provides that the Tiefeneinstelllager is disposed on a support arm which protrudes in front of the longitudinal distance between the miter bearings. The support arm can protrude in the working direction to the rear in front of the rear miter bearing (constructively so in the manner of a circular plunge saw) or in the working direction forward in front of the front miter bearing, which is structurally advantageous, for example, in a pendulum hood saw.

Preferably, a pivot position of the drive assembly to the guide element with respect to the miter axis can be fixed by means of fixing means. For example, fixing screws, clamping screws or the like may be provided on the bearing elements and abutment portions. It is enough if one of the miter bearings is fixable. Particularly preferred, however, is a construction in which the miter bearing assembly has fixing means which is fixedly fixed by an actuator disposed on one of the miter bearings between a fixing position in which the drive assembly is fixedly fixed to the guide member with respect to the miter axis, and a release position in which the engine housing the guide element is pivotable about the miter axis, adjustable. Particularly preferred is a construction with a power transmission arrangement, which will be explained below.

It is advantageously provided that the actuating handle and the power transmission arrangement or a force transmission element are arranged on the drive assembly and pivot with this about the miter axis.

It is a basic idea that the fixing means pivot with the drive assembly so to speak around the miter axis, so that the fixation can always be done at the optimum location. The fixing means are thus designed to fix the drive assembly in at least one pivotal position with respect to the miter axis.

The tool holder is preferably drivable by the drive motor about an axis of rotation, which extends transversely to the working direction or longitudinal direction of the manual cutting machine, for example, the guide member. A flat side of the cutting tool may be parallel to or spaced from the longitudinal spacing between the miter bearings.

The actuating handle expediently comprises a clamping screw or a clamping element. But it can also include a clamping lever or operating lever. Preferably, a hand knob or the like is provided which can be easily grasped by an operator.

Preference is given to several, in particular continuously adjustable, pivotal positions in which the fixation is possible. For example, this can be achieved in that the fixing means comprises clamping means or clamping means or are formed thereby. But it is also possible that the fixing means comprise locking means or a combination of locking means and clamping means. Based on a locking a positive fixation is possible.

The power transmission arrangement is expediently provided in a space between the guide element and the drive motor. It is possible that the power transmission arrangement, for example, a tension element or thrust element of the same, protruding in front of the drive assembly, for example, the drive motor.

It is preferred that the drive assembly on a side opposite the guide element side has a recess for receiving the power transmission arrangement, for example a thrust element or tension element thereof. The side with the recess is preferably a flat side, which in a predetermined pivotal position opposite a top or flat side of the guide member. It is preferred if this flat side can support the surface of the drive assembly that has the depression substantially flat or with flat sections. Thus, this side of the drive assembly is preferably flat on the flat side or upper side of the guide element when the predetermined pivot position, for example, a so-called zero-degree position, is. In the predetermined pivoting position, the separating tool, for example the saw blade, is preferably at right angles to the underside or guide side of the guide element.

A particularly preferred embodiment of the invention provides that one or more waistings or constrictions on the drive train of the drive assembly, which includes the tool holder and the drive motor, is provided and the power transmission arrangement with, for example, a tension element or push element this waisting or constriction passes.

The tension element or push element is preferably rod-shaped or comprises at least one rod-shaped section.

It is advantageous if the power transmission arrangement and the actuating handle act in the fixing position in the sense of bracing and / or latching the abutment portions with the bearing elements on the abutment portions and / or the bearing elements. This construction has the advantage that, so to speak, the bearing elements are clamped or latched to the abutment sections. It is preferred, for example, that one of the bearing elements is sandwiched between the actuating handle and a component of the power transmission arrangement, for example a push element or tension element.

A further advantageous design measure provides that at least one bearing element or at least one abutment portion has a movement play in a pulling direction or a thrust direction, so that the abutment portion or the bearing element by the actuating handle and / or the power transmission arrangement is deflectable to engage in the sense of a bracing or Verrastens or both with opposite element of bearing element or abutment portion in engagement and / or at least in contact.

It is preferred if the abutment portions of the drive assembly are sandwiched between the bearing elements and act on the power transmission assembly and the actuating handle in the fixing position, the bearing elements to the abutment portions.

It is furthermore advantageous if at least one of the bearing elements or abutment sections is resilient, so that it moves away from the opposite abutment sections or bearing element, as it were, without the aforementioned application of force by the power transmission arrangement and / or the actuating handle.

At least one of the bearing elements expediently has an arcuate guide slot running around the miter axis. A component of the fixing means, for example the actuating handle or a component of the power transmission arrangement, in particular a tension element, has a guide slide guided in the guide slot or forms such. For example, a head of a pulling element or pushing element can engage in the guide slot and be guided on this. The guide slot and the slide follower thus lead the pivoting movement of the drive assembly to the miter axis and are at the same time components of the fixing.

The abutment portions are suitably arranged on a drive carrier of the drive assembly, which is pivotally mounted on the bearing elements of the miter bearing assembly about the miter axis. The power transmission arrangement is preferably arranged on the drive carrier. The drive carrier is preferably plate-like or has a plate-like section.

The drive motor and the tool holder are expediently movably mounted on the drive carrier with at least one degree of freedom of movement. For example, a pivot bearing, a sliding bearing or a combination of these bearings is provided to adjust the tool holder and thus also the drive motor in a Tiefeneinstellrichtung, for example, to adjust the depth of cut of the cutting tool in the tool. An advantage of this construction is the fact that, as it were, the fixing means engage the drive carrier and the tool holder is additionally adjustable relative to the drive carrier.

The power transmission arrangement expediently has at least one tension element or thrust element for the preferably linear force transmission between the actuating handle and the miter bearing remote from the actuating handle or is thereby formed. With the thrust force or the thrust element, it is possible, for example, to press abutment portions in the direction of the bearing elements. With the tension element, it is possible to pull the bearing elements in the direction of the abutment portions. The bearing elements are preferably resilient or at least elastic, so that they are movable in the direction of the abutment portions and thus clamped or latched. A simple pushing movement or pulling movement is therefore sufficient to effect the fixation on both miter bearings.

The push element or tension element is expediently configured as a slide follower for a guide slot provided on a bearing element of the miter bearing arrangement. Preferably, the thrust element or tension element on such a slide follower. As already mentioned, of course, the actuating handle, for example, a thumbscrews or the like, form a gate follower.

Alternatively, it would also be conceivable that, for example, a screw or a screw arrangement is provided as part of the power transmission arrangement.

The tension element or thrust element is expediently held against rotation on the drive assembly. For example, the respective tension element or thrust element on a Verdrehsicherungsabschnitt, for example, a flattening or the like, which rests against rotation on a complementary anti-rotation portion of the drive assembly.

It is also preferred if the tension element or push element is not twistable. For example, the tension element or push element is substantially rigid. But it is also possible that is provided as a tension element or thrust element, a Bowden cable. There are thrust Bowden cables and Bowden cables. Also, a cable transmission would be as a power transmission arrangement, at least as part of it, readily possible.

Figur 1

eine perspektivische Schrägansicht von schräg oben vorn auf eine Hand-Trennmaschine,

Figur 2

die Hand-Trennmaschine gemäß Figur 1 von schräg hinten oben,

Figur 3

die Hand-Trennmaschine gemäß Figuren 1, 2 mit einer Führungsschiene,

Figur 4

eine Frontalansicht von vorn auf ein Führungselement der Hand-Trennmaschine zusammenwirkend mit der Führungsschiene gemäß Figur 3,

Figur 5

das Führungselement gemäß Figur 4 sowie einen Antriebsträger einer Antriebsbaugruppe der Hand-Trennmaschine gemäß vorstehenden Figuren,

Figur 6

eine Ansicht von unten auf den Antriebsträger der Antriebsbaugruppe gemäß Figur 5,

Figur 7

eine erste und

Figur 8

eine zweite Schrägansicht einer Gehrungslageranordnung der Hand-Trennmaschine gemäß der vorstehenden Figuren.

Hereinafter, an embodiment of the invention will be explained with reference to the drawing. Show it:

FIG. 1

an oblique oblique view from the front obliquely on a hand-ripper,

FIG. 2

the hand-ripper according to FIG. 1 from diagonally back up,

FIG. 3

the hand-ripper according to FIGS. 1, 2 with a guide rail,

FIG. 4

a frontal view from the front of a guide element of the hand-cutting machine cooperating with the guide rail according to FIG. 3 .

FIG. 5

the guide element according to FIG. 4 and a drive carrier of a drive assembly of the manual cutting machine according to the preceding figures,

FIG. 6

a view from below of the drive carrier of the drive assembly according to FIG. 5 .

FIG. 7

a first and

FIG. 8

a second oblique view of a miter bearing assembly of the hand-cutting machine according to the preceding figures.

A manual cutting machine 10 includes a drive assembly 11 having a drive motor 12 for rotationally driving a tool holder 13 about an axis of rotation D includes. The drive motor 12 is arranged in a machine housing 35. At the tool holder 13, a cutting tool 14 is detachably fastened, for example, a saw blade, a cutting wheel or other cutting tool. For example, bayonet connection means, screw connection means, in particular a retaining screw or the like for fastening the separating tool 14 to the tool holder 13 are provided. The hand-ripper is thus for example a saw or more generally a ripper. The drive assembly 11 is provided with a handle 15 on which a switch 16 for switching on or off of the drive motor 12 is arranged. Furthermore, a connection for an energy storage device 17, for example a battery pack, is provided on the drive assembly 11 in order to supply the drive motor 12 or, more generally, the manual cutting machine 10 with electrical energy. A power supply with a power cord for connection to an electrical power grid is readily possible, but not shown.

The cutting tool 14 is protected by an upper, fixed cover 18 and below by a movable cover 19, which can pivot in the region of the fixed cover 18. The manual cutting machine 10 is a reciprocating saw, i. that the movable cover 19 can pivot to or under the fixed cover 18, to release the lower in the drawing of the saw blade or cutting tool 14 for a saw cut or separating cut.

On the underside of the drive assembly 11 and the machine housing 35, a guide member 20 is provided. The guide element 20 is plate-like and forms a guide plate 21. The cutting tool 14 is provided in the working direction A on the right side 22, while the energy storage 17 is in the region of a left side 23 and a back 25 of the guide member 20. A front side 24 of the guide element 20 is in the direction of A front.

The drive assembly 11 and thus the machine housing 35 are thus arranged on the upper side 26 of the guide element 20, while the underside of the Guide member 20 forms a guide surface 27. At the top 26 is still a handle 28 is provided, with which the hand-ripper 10 can be conveniently taken and performed in addition to the handle 15 by an operator. The handle 28 is configured, for example, in the manner of a knob, so that it can be comfortably grasped by an operator. For example, the operator may press the handle 28 with his palm. The toggle, for example, arranged on a columnar support which projects upwardly in front of the top 26 of the guide plate 21 / the guide member 20.

In this way, the guide explained below the hand-ripper 10 along a guide rail 90 is facilitated. The manual cutting machine 10, the guide rail 90 form a guide system. 5

On the underside, namely the guide surface 27, of the guide element 20 guide receptacles are provided, which are provided for engagement of guide projections of the guide rail 90. The manual cutting machine 10 is to be guided along the guide rail 90 in a working direction A, namely in the direction of a longitudinal axis L, in order to introduce cuts into a workpiece (not shown).

• Anhand einer Gehrungslageranordnung 30 können Schrägschnitte in das Werkstück eingebracht werden. Die Antriebsbaugruppe 11 und somit das Maschinengehäuse 35 und die Werkzeugaufnahme 13 können nämlich angedeutet durch einen Pfeil G um eine Gehrungsachse GA schwenken.

In this case, the separating tool 14 can assume different positions relative to the guide rail 90:

• Using a miter bearing arrangement 30, bevel cuts can be made in the workpiece. The drive assembly 11 and thus the machine housing 35 and the tool holder 13 can namely indicated by an arrow G pivot about a miter axis GA.

The miter bearing 30 is in two parts and comprises a front in the direction of miter 31 and a rear in the direction of miter bearing 32, which are arranged at a longitudinal distance from each other, in which the drive motor 12 and the tool holder 13 and thus the essential components of the drive assembly 11 are located.

The guide plate 21 is configured for guiding along the guide rail 90. A guide surface 27 on the underside of the guide plate 21 is provided for guiding on a guide surface 92 of a rail body 91 of the guide rail 90. The guide surface 92 is located at the top of the guide rail 90, the underside 95 is provided for placement on a substrate, for example, the workpiece to be machined. Before the guide surface 92 of the guide rail 90 are a longitudinal guide projection 93 and / or a Hintergreifvorsprung 94 (only one of which would also be possible), which engage in a longitudinal guide receptacle 33 and a Hintergreifaufnahme 34 on the guide member 20 and are provided for engagement. The longitudinal guide receptacle 33 is essentially provided for guidance along the working direction A, that is to say along a longitudinal axis L of the guide element 20 or the guide rail 90, and supports the guide element 20 in a transverse direction Q extending transversely to the longitudinal axis L or working direction A, for example at right angles The optional rear-engagement projection 94 acts in the sense of holding the guide surfaces 27, 92 against one another, thus holding the guide element 20 on the guide rail 90 in a depth direction T that is perpendicular to the longitudinal axis L and the transverse direction Q. The advantage here is that the operator can take the guide rail 90, for example, for so-called Kappschnitte by only the hand-ripper 10 takes, so also at the same time the guide rail 90 and entrains the overall configuration or the guide system 5 consisting of hand-ripper 10 and Guide rail 90 hangs back on the ground at the workplace.

Based on a Tiefeneinstelleinrichtung with a Tiefeneinstelllager 36, which is unlocked by pressing an actuator 29, the tool holder 13 can be pivoted relative to the guide member 20 about a pivot axis SA, which is indicated by an arrow S in the drawing. Thus, the depth of the cutting tool 14 can be adjusted relative to the guide rail 90, and therefore also the penetration or cutting depth of the cutting tool 14 with respect to the depth direction T are set in the workpiece.

Before the top 26 of the guide member 20 are plate-like bearing elements 37, 38 of the front and rear miter bearings 31, 32 from. The bearing elements 37, 38 have a circular segment-like shape. The bearing elements 37, 38 are integral with, for example, the body of the guide element 20 or as in the embodiment thereof separate components. The bearing elements 37, 38 are expediently made of plastic and thus have a certain flexibility or elasticity relative to the guide element 20. This is of importance in particular with regard to a later explained fixing of the drive assembly 11 with respect to the guide element 20. The bearing elements 37, 38 are bolted to the guide element 20 by means of screws 39, for example.

On the bearing elements 37, 38 are abutment portions 41, 42 of a drive carrier 40 pivotally mounted. The bearing elements 37, 38 together with the abutment portions 41, 42, the miter bearings 31, 32 or components thereof. The drive carrier 40 has a plate-like base body 43, on the rear longitudinal end region of the abutment portion 42 is formed. From the main body 43 is upwardly from an arm 44, which covers the cutting tool 14 at least partially.

In the working direction A in front of the abutment portion 41, a passage opening 45 is provided, through which the bearing element 37 protrudes upward in front of the upper side of the drive carrier 40. On the abutment portion 41 opposite side of the passage opening 45 extends a support arm 46, at the front, free end portion of the Tiefeneinstelllager 36 is provided. For example, stand coaxially with the pivot axis SA bearing projections 47, which engage in corresponding bearing mounts a front of the machine housing 35 projecting and with the machine housing 35 and thus also the drive motor 12 and the tool holder 13 firmly connected support arm 48. Thus, therefore, the machine housing 35 and thus also the tool holder 13 about a very far forward, namely on the front side 24 of the guide member 20, transverse to the direction A pivot axis of the SA pivot.

The position of the front miter bearing 31 with respect to the drive assembly 11 and in particular the axis of rotation D of the tool holder 13 is particularly favorable for the handling of the manual cutting machine 10. In the working direction A in the front is namely the Tiefeneinstelllager 36 and further back the front miter bearing 31. The front miter 31 is close to the axis of rotation D of the tool holder 13 and the separating tool 14, at least behind an outer periphery 49 of the separating tool fourteenth

Thus, an exit region 50 of the cutting tool 14 from the workpiece, not shown, is not covered by the miter bearing 31. As an additional, advantageous measure, it is provided that a recess 51 are provided on the support arm 46 and a further recess 52 on the guide element 20, which are easily visible by an operator, at least in a lower pivot end position, when the drive support 40 is completely pivoted to the guide element 20 , A further recess 53 is provided at the front end region of the fixed cover 18, that is to say near the depth adjustment bearing 36, through which the outlet region 50 is likewise visible.

The operator can thus, if he looks from obliquely above, so for example from the handle 28 or actuator 29 ago, in the direction of the exit region 50, see through the recesses 51, 52, 53 through the exit area 50 and thus very accurately the saw cut or cut of the cutting tool 14 into the workpiece.

In a lower pivot end position, when the drive assembly 11 is fully pivoted to the guide member 20 with respect to the miter axis GA, a bottom 54 of the drive carrier 40 of the top 26 of the guide member 20 is opposite, in this position even a touch contact between the bottom 54 and the top 26th is possible. Nevertheless, due to the construction of fixing means 55 explained below, it is readily possible for both miter bearings 31, 32 to be fixable with a single actuating handle 56, so that the drive assembly 11 is fixed to the guide element 20 so as to be pivotable with respect to the miter axis GA.

Namely, the fixing means 55 further include a power transmission assembly 57 extending between the miter bearings 31, 32. The power transmission arrangement 57 comprises a tension element 58, which has an abutment head 60 serving as a slide follower 59 at its end region assigned to the bearing element 37.

The link follower 59 engages in a guide slot 61 of the bearing element 37. The guide slot 61 runs as well as optional existing guide receptacles or guide projections, such as guide or guide ribs, circular arc around the miter axis GA. The guide slot 61 is provided on a front bearing 62 of the end portion 62 of the bearing element 37. The slide follower 59 projects forward in front of a bearing side of the abutment portion 41 opposite the end face 62.

For example, the slide follower 59 is mushroom-shaped and engages in its capacity as an abutment head 60 abutment contours 63 which project inwardly to the guide slot 61. Thus, therefore, the bearing member 37 can be pulled and tensioned by the tension member 58 by a force in a pulling direction Z1 in the direction of the abutment portion 41.

At its remote from the abutment head 60, the other longitudinal end of the tension element 58 has a further slide follower 64 which penetrates a guide slot 65 on the bearing element 38. The slide follower 64 is formed by a bolt portion 66 of a clamping screw 67, at the head 68, the actuating handle 56 is arranged so that on the basis of the actuating handle 56, the clamping screw 67 can be screwed into a threaded receptacle 69 on the tension member 58 or screwed out of it. The head 68 is supported on a side 70 of the bearing element 38 facing away from the counter bearing section 42, preferably via a washer 71.

Thus, when the clamping screw 67 is screwed into the threaded receptacle 69, the tension member 58 pulls the bearing member 37 to the abutment portion 41 in the pulling direction Z1 and the bearing member 38 to the abutment portion 42 in the pulling direction Z2, that is opposite. Thus, so the tension member 58 in the fixing position F, the two bearing elements 37, 38 in a sense towards each other (indicated by arrows F in FIG. 4 ), so that they take the abutment portions 41, 42 so to speak in the pliers, so that the drive carrier 40 between the two bearing elements 37, 38 is tensioned and thus fixed with respect to the miter axis GA on the guide member 20 is fixed. It can be seen that the fixing means 55 can be operated by the actuation of the single actuating handle 56, which is preferably provided on the rear, free in the region of the manual separating machine 10. Thus, it is not disturbing that the front miter bearing 31 is relatively difficult to access for such operator interventions.

If the tension of the tension member 58 decreases by the actuating handle 56 is adjusted in the direction of the release position, for example, screwed so to speak, the resilient property of the bearing elements 37, 38 ensures that they move in a sense away from the Mithrungslagerabschnitten 41, 42 away, so that the drive carrier 40 is pivotable relative to the guide element 20 with respect to the miter axis GA. Is in FIG. 4 indicated by arrows U.

The power transmission assembly 57 is disposed on the drive assembly 11. Thus, it makes the pivotal movement of the drive assembly 11 around the miter axis GA with.

The tension element 58 is preferably rod-shaped.

In order that the power transmission arrangement 57 does not get in the way even in the so-called lower pivoting position of the drive assembly 11 with respect to the miter axis GA, it is possible to connect to the drive assembly 11, e.g. Drive carrier 40, a receptacle 72 provided in the form of a recess in which the tension member 58 is received.

The tension element 58 and the receptacle 27 expediently have a plurality of mutually angular sections.

The receptacle 72 is advantageously adapted in its contour to the tension element 58. However, it would also be conceivable that, for example, completely or essentially straight pulling element is provided.

The receptacle 72 has a portion 73 for the rotationally secure receiving a threaded sleeve 74, which has the threaded receptacle 69, on.

Of the portion 73, a portion 75 of the receptacle 72 extends away, in which a rod portion 76 of the tension member 58 is received. The portion 75 and the rod portion 76 extend from the actuating handle 56 obliquely away in the direction of the bottom 54 of the drive carrier 40th

The section 75 is followed by a section 78 of the receptacle 72 having anti-rotation contours 77 in which a rod section 79 of the tension element 58 is received in a manner secure against rotation. The rod portion 79 as well as the portion 78 is polygonal, for example, approximately flat in cross-section rectangular, so that the rod portion 79 in the portion 78 of the recess or receptacle 72 can not rotate. Since the remaining portions of the tension member 58 are not twistable, the tension member 58 can not rotate in total in the receptacle 72.

At a free end of an adjoining the rod portion 79 end portion 80 which is received in a portion 81 of the receptacle 72, the abutment head 60 is arranged.

The tension element 58 has a longitudinal play in the receptacle 72 with respect to the tension directions Z1, Z2. For example, the portion 78, which is a waisting of the receptacle 72, so to speak, with respect to the longitudinal axis L, in which the tensile directions Z1 and Z2 extend, shorter than the rod portion 79 so that it projects into the larger cross-sectional portions 75 and 81 ,

On one or both of the bearing elements 37, 38, a scale 82 is preferably arranged, to which an index 83 of the drive assembly 11 points.

Claims (14)

Hand-cutting machine, in particular electric hand saw or wall slot cutter, with a guide element (20) which can be placed on a base with its underside, in particular a guide plate (21), and a drive assembly (11) which has a drive motor (12) arranged in a machine housing (35) ) and a by the drive motor (12) about a rotational axis (D) drivable tool holder (13) for a cutting tool (14), in particular a saw blade, which is feasible for producing a separating cut in the workpiece in a working direction (A), wherein the drive assembly (11) on the guide member (20) about a parallel to the working direction (A) Miter axis (GA) by means of a miter bearing assembly (30) is pivotally mounted in the working direction (A) front miter (31) and a in Working direction (A) rear miter bearing (32) at a longitudinal distance to the front miter bearing (31), where the drive assembly (11 ) is mounted pivotably about the miter axis (GA), characterized in that the front miter bearing (31) between the rotational axis (D) of the tool holder (13) and an outer periphery (49) of the separating tool (14) is arranged. Hand-cutting machine according to claim 1, characterized in that the outer periphery (49) of the separating tool (14) in the region of the guide element (20) in front of the front miter bearing (31) protrudes, so that next to or in front of the front miter bearing (31) has an exit region (50) of the separating tool (14) from the workpiece or penetration region of the separating tool (14) into the workpiece, in particular from the drive assembly (11) forth is visible. Hand-cutting machine according to claim 1 or 2, characterized in that the guide element (20) and / or at least one above the guide element (20) arranged component of the hand-cutting machine (10), in particular the drive assembly (11) or a support arm (46) (46) of a Tiefeneinstelllagers (36), a recess (51, 52, 53) through which the exit area ( 50) or the penetration area of the separating tool can be seen from above the guide element (20). Hand-cutting machine according to one of the preceding claims, characterized in that the rear miter bearing (32) in the working direction (A) behind the outer periphery (49) of the separating tool (14) or adjacent to the separating tool (14) is arranged. Hand-cutting machine according to one of the preceding claims, characterized in that the front miter bearing (31) is arranged adjacent to a front in the working direction (A) portion of the separating tool (14) which is at least 50% of the radial distance of the outer periphery (49) of the separating tool ( 14) from the axis of rotation (D). Hand-cutting machine according to one of the preceding claims, characterized in that the drive assembly (11) has a drive carrier (40) on which the drive motor (12) and the tool holder (13) with at least one degree of freedom of movement, in particular pivotally mounted, and which is mounted with abutment portions (41, 42) on in front of an upper side of the guide element (20) projecting bearing elements (37, 38) of the miter bearing assembly (30) about the miter axis (GA) pivotally. Hand-cutting machine according to one of the preceding claims, characterized in that at least one bearing element (37, 38), in particular in the working direction (A) front miter bearing (31), a passage opening (45) of the drive assembly (11), in particular of the drive carrier ( 40), penetrates. Hand-cutting machine according to one of the preceding claims, characterized in that a bearing element (37, 38), in particular in the working direction (A) front miter bearing (31) less far ahead of the top of the guide element (20) protrudes than the other bearing element ( 37, 38). Hand-cutting machine according to one of the preceding claims, characterized in that the tool holder (13), in particular the drive assembly (11), with respect to the guide member (20) based on a Tiefeneinstelllagers (36), in particular a pivot bearing, in a Tiefeneinstellrichtung or depth direction between a upper Tiefeneinstellposition and at least one lower Tiefeneinstellposition is movably mounted. Hand-cutting machine according to claim 9, characterized in that a pivot axis (SA) of Tiefeneinstelllagers (36) outside the longitudinal distance between the miter bearings (31, 32), in particular in the working direction (A) in front of the front miter bearing (31) is arranged. Hand-cutting machine according to claim 9 or 10, characterized in that an exit region (50) of the cutting tool from the workpiece or a penetration region of the cutting tool (14) into the workpiece between the pivot axis (SA) of Tiefeneinstelllagers (36) and the front miter ( 31) is provided. Hand-cutting machine according to one of claims 9 to 11, characterized in that the Tiefeneinstelllager (36) on a support arm (46) (46) is arranged in front of the longitudinal spacing between the miter bearings (31, 32), in particular in front of the front miter (31) in working direction (A), projecting. Hand-cutting machine according to one of the preceding claims, characterized in that the miter bearing arrangement (30) fixing means (55) by at least one arranged on one of the miter actuating handle (56) between a fixing position in which the drive assembly (11) with respect the miter axis (GA) is fixed in place on the guide element (20), and a release position, in which the machine housing (35) with respect to the guide element (20) about the miter axis (GA) is pivotally adjustable. Hand-cutting machine according to claim 13, characterized in that the actuating handle (56) is arranged on a miter bearing and for transmission the force of the actuating handle (56) is provided on the other miter bearing (31) a power transmission assembly (57) between the miter bearings, and that the actuating handle (56) and the power transmission assembly (57), in particular a power transmission element, on the drive assembly (11) and swing it around the miter axis (GA).

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