Oscillating machine tool saw table

Abstract

Oscillating machine tool saw table for an oscillating power tool (12), with a table surface (14) provided for supporting a workpiece (16), wherein a linear guide unit (18) is provided, which has at least one guide carriage (22) movable translationally in a feed direction (20) with a bearing unit (24) provided for supporting a mounting unit (26) of the power tool (12), characterized in that the bearing unit (24) is provided for receiving the mounting unit (26) of the power tool (12) in a receiving direction (28) that is at least substantially perpendicular to the feed direction (20), wherein a bearing device (46) pivotably supports two stop rulers (48) arranged on the table surface (14) about an axis (50) that is at least substantially perpendicular to the table surface (14), wherein the bearing device (46) has a cam control (52) which is provided forto couple a pivoting movement of the stop rulers (48) symmetrically to an angle bisector (54) of the stop rulers (48).

Description

State of the art

[0001] Oscillating machine tool saw tables for an oscillating power tool with a table surface intended for supporting a workpiece are already known from documents DE 198 03 955 A1, DE3733454A1, EP 1849558 A1, DE 10 2010 039 637 A1 and WO 99 / 02 317 A1. Disclosure of the invention

[0002] The invention relates to an oscillating machine tool saw table for an oscillating power tool, with a table surface that is provided for supporting a workpiece.

[0003] According to the invention, a linear guide unit is proposed, comprising at least one guide slide movable translationally in a feed direction and a bearing unit designed to support a mounting unit of the power tool. In this context, an "oscillating power tool" is understood to be, in particular, a power tool with a rotary oscillation drive. Preferably, the rotary oscillation drive drives a tool holder of the power tool in at least one operating state, oscillating about a rotational axis of the tool holder by a small swivel angle. In this context, a "small swivel angle" is understood to be, in particular, an angle of less than ±15°, preferably less than ±10°, and most preferably less than ±5°, starting from a neutral position.Preferably, the power tool is a handheld power tool intended for predominantly handheld use. In this context, "feed direction" refers in particular to the direction in which the power tool is moved to process the workpiece. Specifically, the feed direction may be designed to make a saw cut in the workpiece using a saw blade mounted on the tool holder of the oscillating power tool. In this context, "bearing unit" refers in particular to a device for supporting the mounting unit of the power tool, which is designed to fit the mounting unit. The bearing unit may, in particular, include mating surfaces that are compatible with the mounting unit. Preferably, the mounting unit can be attached to the bearing unit by means of fasteners. Fasteners may, in particular, be screws.Other fastening means known to those skilled in the art are also conceivable. Mating surfaces can be provided, in particular, to fix the position of the power tool by means of a force-fit and / or positive locking mechanism. The bearing unit can, in particular, contain positive locking fastening means, especially threaded recesses. Preferably, the bearing unit can be designed as a clamping neck receptacle, which is intended to receive a clamping neck. In this context, a "clamping neck" is understood to mean, in particular, a fastening unit that is designed as an at least substantially cylindrical section of the power tool, which is provided for mounting the power tool by means of a force-fit connection via a clamping device. The clamping device is preferably designed as a clamping neck receptacle. The clamping neck can preferably have cams and grooves that deviate from a cylindrical shape, as well as other positive locking elements.The positive locking elements can be designed, in particular, to increase the stability of the force-fit mounting of the power tool by means of a positive locking mechanism. The positive locking elements can also be designed, in particular, to align and / or fix the position of the power tool relative to the clamping neck mount with respect to at least one translational and / or rotational degree of freedom. The oscillating machine tool saw table can advantageously guide the power tool, intended for predominantly hand-held use, in a stationary position through the linear guide unit. Particularly precise saw cuts can be achieved. The power tool can perform a saw cut along a line. When sawing along a line, a narrower saw blade can be used advantageously than when sawing by pivoting.In this context, a pivoting movement should be understood in particular as a movement of the power tool around a pivot point.

[0004] According to the invention, the bearing unit is provided for receiving the mounting unit of the power tool in a receiving direction that is at least substantially perpendicular to the feed direction. In this context, a "receiving direction" is understood to be a direction in which the power tool is inserted into and / or pushed onto the bearing unit for mounting with the mounting unit. In particular, the clamping neck can be inserted into and / or withdrawn from the clamping neck receptacle in the receiving direction. "At least substantially" in this context is understood to mean a deviation of less than 20°, preferably less than 10°, and particularly preferably less than 5°. The receiving direction is particularly preferably at least substantially the axis of rotation of the rotary oscillation drive.The mounting direction can be at least substantially perpendicular to the feed direction and perpendicular to any working movement of the tool driven about the axis of rotation. Forces generated by the feed movement and / or the working movement can preferably be at least predominantly perpendicular to the mounting direction. Only particularly low forces need to be transmitted in the mounting direction during machining of the workpiece. The mounting of the power tool by the fastening unit is particularly effective at absorbing forces in the feed direction and / or forces generated by the working movement. The power tool can be guided with exceptional precision during sawing.

[0005] According to the invention, a bearing device is proposed which pivotably mounts two stop rulers arranged on the table surface about an axis that is at least substantially perpendicular to the table surface. Preferably, the perpendicular axis is aligned in the feed direction. Particularly preferably, at least one stop ruler can be mounted so as to be displaceable perpendicular to the pivoting direction. A user can advantageously place a workpiece, in particular a rod-shaped workpiece such as a strip, against one stop ruler and fix it with one end of the other stop ruler.

[0006] According to the invention, a cam control is proposed which is designed to couple a pivoting movement of the stop guides symmetrically to an angle bisector of the stop guides. In this context, a "cam control" is understood to mean, in particular, a mechanical coupling mechanism designed to couple a movement of the stop guides. Preferably, the angle bisector is arranged perpendicular to the receiving direction of the bearing unit and to the feed direction. The angle bisector can advantageously lie in the direction of the oscillating movement of the saw blade of the power tool. A saw cut with half the angle of the angle spanned by the two stop guides can advantageously be made on a workpiece placed against a stop guide.Preferably, two workpieces can be cut symmetrically along the angle bisectors of each other using the oscillating machine tool saw table. Preferably, the bearing assembly for the stop guides includes a device for fixing the position of the stop guides. In particular, a locking screw can be provided to clamp the bearing assembly and / or the cam control by friction. The two workpieces can then be placed together with their cut surfaces aligned at the angle set on the stop guides. A bevel gauge can have two hinged guides. A user can place the bevel gauge in a corner of a room and transfer the corner angle to the bevel gauge. The user can then use the bevel gauge to adjust the angle of the stop guides to the corner angle of the room.The user can cut two strips, especially baseboards, with a single saw cut along the bisector of the room's corner angle using the oscillating machine saw table. The user can then butt the cut surfaces of the baseboards together to fit precisely at the room corners.

[0007] It is further proposed that the bearing unit has at least one projection for securing a groove in the mounting unit to an axial fixation of the power tool relative to the receiving direction. Preferably, the projection is designed as an annular projection on a cylindrical inner surface of the bearing unit, which is configured as a clamping neck receptacle. Preferably, the projection engages in the groove of the clamping neck mounting unit when the bearing unit is clamped. A relative axial position of the power tool to the bearing unit can be advantageously defined. High forces can be advantageously transmitted in the receiving direction.

[0008] It is further proposed that the bearing unit have at least one groove for receiving a cam of the power tool's mounting unit, thus securing the power tool radially relative to the mounting direction. In this context, a "cam" is understood to be, in particular, a projection of the mounting unit. Preferably, the cam engages in the groove of the bearing unit, at least when the unit is clamped. A relative radial position of the power tool to the bearing unit can be advantageously defined. Particularly large moments can be transmitted about an axis aligned with the mounting direction. Rotation of the power tool within the bearing unit can be prevented.

[0009] It is further proposed that the bearing unit comprises at least one clamping means for securing the mounting unit of the power tool. Preferably, the bearing unit can have a gap on at least one side in the receiving direction. The clamping means can preferably be designed to reduce the width of the gap by applying a preload force. The inner diameter of the bearing unit can be reduced. The inner surface of the bearing unit can advantageously form a frictional connection with the mounting unit. The projection for securing the groove of the mounting unit can advantageously form a positive connection with the bearing unit. Preferably, the clamping means includes a clamping screw designed to adjust the preload force. However, other means known to those skilled in the art for generating and adjusting a preload force are also possible.

[0010] It is further proposed that the guide carriage be supported on at least one column guide. Preferably, the guide carriage can be supported on two column guides. The guide columns of the column guide preferably have a cylindrical cross-section. Manufacturing the guide columns can be particularly simple. The bearing arrangement of the guide carriage can be particularly robust and cost-effective. Preferably, the guide columns are arranged side by side on one side of the bearing unit in a direction perpendicular to the direction of contact, spaced apart. Preferably, the spacing is greater than the inner diameter of the bearing unit. The column guide can transmit moments resulting from a cantilever of the bearing unit with the power tool particularly well.

[0011] Furthermore, at least one spring element is proposed, designed to move the guide carriage away from the table surface and into a starting position in at least one operating state, opposite to the feed direction. Preferably, the column guide includes at least one stop element that limits movement of the guide carriage against the feed direction at the starting position. Preferably, the spring element has a spring force, at least in the starting position, that is greater than the weight of the power tool. The spring force can be adjustable and / or configurable for use with different power tools. The power tool can return to the starting position automatically. To perform a saw cut, the user can push the power tool against the spring force toward the workpiece. Using the oscillating machine tool saw table can be particularly convenient.

[0012] Furthermore, a system comprising an oscillating power tool and an oscillating machine tool saw table is proposed. This system offers the aforementioned advantages. The oscillating machine tool saw table and the power tool can be particularly well-matched. drawing

[0013] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0014] They show: Fig. 1 a schematic representation of an oscillating machine tool saw table with a power tool, Fig. 2 a schematic sectional view of a bearing unit of the oscillating machine tool saw table, Fig. 3 a schematic representation of a cam control of the oscillating machine tool saw table and Fig. 4 A schematic representation of a bevel gauge for transferring an angle to the oscillating machine tool saw table. Description of the exemplary embodiment

[0015] Fig. Figure 1 shows an oscillating machine tool saw table 10 for an oscillating power tool 12, with a table surface 14 designed to support a workpiece 16. The oscillating machine tool saw table 10 forms a system with the power tool 12. A linear guide unit 18 with a guide carriage 22 movable translationally in a feed direction 20, and with a bearing unit 24 designed as a clamping neck mount, which is designed to receive a clamping neck mounting unit 26 of the power tool 12, supports the power tool 12. The power tool 12 has a tool holder 56. The tool holder 56 is driven by the power tool 12 in an oscillating motion about a rotational axis 58 of the tool holder 56 by a small swivel angle of less than ±5°, in the example shown ±2.8°.A saw blade 60, mounted on the tool holder 56, performs a working movement 62 on a circular path around the axis of rotation 58. The feed direction 20 is oriented perpendicular to the table surface 14. If the guide carriage 22 is moved in the feed direction 20 towards the table surface 14, the saw blade 60 can make a saw cut in the workpiece 16 in the direction of the working movement 62.

[0016] The bearing unit 24 is designed to receive the mounting unit 26 of the power tool 12 in a receiving direction 28 that is perpendicular to the feed direction 20 and perpendicular to the table surface 14. The receiving direction 28 is aligned with an axis of symmetry of the mounting unit 26 formed by the axis of rotation 58. The mounting unit 26 is predominantly formed by a cylindrical part 64, which has a cylindrical shape ( Fig. 2) The bearing unit 24 has a hollow cylindrical surface 66 on its inner side. The fastening unit 26 has a groove 32 into which, in a clamped state of the bearing unit 24, a projection 30 of the bearing unit 24 engages to axially fix the power tool 12 relative to the receiving direction 28. Furthermore, the bearing unit 24 has a groove 34 for receiving a cam 36 of the fastening unit 26 of the power tool 12 to radially fix the power tool 12 relative to the receiving direction 28. The bearing unit 24 has a gap 68 on one side facing away from the linear guide unit 18. A clamping element 38, in the example shown a clamping screw, is arranged at the gap 68. In a clamped state, the clamping means 38 exerts a clamping force on the bearing unit 24, which reduces the gap 68 and thus clamps the bearing unit 24 to the fastening unit 26 by means of a force-fit connection.In addition, the projection 30 and the groove 34 form a positive fit with the fastening unit 26. The power tool 12 is thus securely fixed in the storage unit 24.

[0017] The guide carriage 22 is mounted on a column guide 40 with two guide columns 70. The guide columns 70 are arranged at a distance 72 in a direction perpendicular to the receiving direction 28. A spring element 42 is provided to move the guide carriage 22 away from the table surface 14 to a starting position 44 in the opposite direction of feed 20 during operation. The movement of the guide carriage 22 against the feed direction 20 is stopped in the starting position 44 by a stop (not shown). To make a saw cut on the workpiece 16, the guide carriage 22 is pressed towards the workpiece 16 against the force of the spring element 42.

[0018] Two stop guides 48 are pivotably mounted on the table surface 14 by a bearing device 46 about a vertical axis 50. The axis 50 is arranged parallel to the feed direction 20 and intersects the axis of rotation 58 of the power tool 12, which forms one axis of symmetry of the bearing unit 24. The bearing device 46 has a cam control 52, which is designed to couple a pivoting movement of the stop guides 48 symmetrically to an angle bisector 54 of the stop guides 48. The angle bisector 54 is arranged in a plane defined by the working movement 62 of the saw blade 60. The cam control 52 includes two stop holders 74 rotatably mounted about the axis 50. Fig. 3), which are connected via two linkages 78 connected by a pivot pin 76. The pivot pin 76 is guided by a linear guide 80 arranged in the direction of the angle bisector 54 and can be fixed to the linear guide 80 by a clamping screw 82 screwed into the pivot pin 76.

[0019] A user takes a corner angle 84 of a room corner 92 with a bevel 90 consisting of two rulers 88 connected by means of a joint 86 ( Fig.4) and transfers this corner angle 84 to the stop rulers 48. The corner angle 84 can be fixed with the clamping screw 82. Now, a workpiece 16 designed as a baseboard can be placed against a stop ruler 48 and cut with a saw. The saw cut has half the corner angle 84 relative to the outer edge of the workpiece 16 as it is placed against the stop ruler 48. A second identical workpiece 16, not shown here, is placed against the second stop ruler 48 in a mirror image with respect to the plane spanned by the working movement 62 of the saw blade 60, so that a second saw cut with half the corner angle 84 is made on the second workpiece 16. The two workpieces 16 can now be fitted precisely into the corner 92 of the room with the corner angle 84.

Claims

[1] Oscillating machine tool saw table for an oscillating power tool (12), with a table surface (14) which is provided for supporting a workpiece (16), wherein a linear guide unit (18) is provided which has at least one guide carriage (22) movable translationally in a feed direction (20) with a bearing unit (24) which is provided for supporting a mounting unit (26) of the power tool (12), characterized by, that the bearing unit (24) is provided for receiving the fastening unit (26) of the power tool (12) in a receiving direction (28) that is at least substantially perpendicular to the feed direction (20), wherein a bearing device (46) which pivotably supports two stop rulers (48) arranged on the table surface (14) about an axis (50) that is at least substantially perpendicular to the table surface (14), wherein the bearing device (46) has a cam control (52) which is provided to couple a pivoting movement of the stop rulers (48) symmetrically to an angle bisector (54) of the stop rulers (48). [2] Oscillating machine tool saw table according to claim 1, characterized by , that the bearing unit (24) has at least one projection (30) for fixing a groove (32) of the fastening unit (26) of the power tool (12) for axial fixing of the power tool (12) relative to the receiving direction (28). [3] Oscillating machine tool saw table according to one of the preceding claims, characterized by , that the bearing unit (24) has at least one groove (34) for receiving a cam (36) of the fastening unit (26) of the power tool (12) for a radial fixation of the power tool (12) relative to the receiving direction (28). [4] Oscillating machine tool saw table according to one of the preceding claims, characterized by , that the bearing unit (24) has at least one clamping means (38) for fixing the fastening unit (26) of the power tool (12). [5] Oscillating machine tool saw table according to one of the preceding claims, characterized by , that the guide carriage (22) is mounted on at least one column guide (40). [6] Oscillating machine tool saw table according to one of the preceding claims, characterized byat least one spring element (42) which is intended to move the guide slide (22) away from the table surface (14) in at least one operating state against the feed direction (20) into a starting position (44). [7] System comprising an oscillating power tool (12) and an oscillating machine tool saw table (10) according to one of the preceding claims.

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