hand-held power tool workpiece protection device

Abstract

A hand-held machine tool workpiece protection device for a portable machine tool, in particular for a grinding machine, with at least one spacer unit (14) designed to maintain a distance between a machining tool (20) arranged on a tool holder (18) of the portable machine tool and an element (24) extending at least substantially transversely to a workpiece surface (22) of the workpiece (16) to be machined by means of the machining tool (20), characterized in that the spacer unit (14) comprises at least one spacer element (26) movably arrangable on the portable machine tool, wherein the spacer element (26) has a configuration corresponding to a receiving area (48) of a machine tool housing (40), wherein the receiving area (48) is provided toto at least partially accommodate the distance unit (14) in a state arranged on the portable machine tool (12).

Description

State of the art

[0001] Hand-held power tool workpiece protection devices for portable power tools are already known, for example from US 2003 148 719 A, in particular for grinding machines. These devices comprise a spacer unit intended to ensure a distance between a machining tool arranged on a tool holder of a portable power tool and an element extending transversely to a workpiece surface to be machined by the machining tool during machining of a workpiece. The spacer unit comprises a spacer element that can be rigidly arranged on the portable power tool.Due to the rigid arrangement of the spacer element, during a movement of the portable machine tool together with the spacer element of the spacer unit rigidly arranged on the machine tool relative to the element extending transversely to the workpiece surface, damage to a surface of the element extending transversely to the workpiece surface can occur.

[0002] Furthermore, devices are known from DE 299 023 65 U1 and DE 10 2010 04 8 424 A1 which arrange a hand-held power tool at a distance from a workpiece to be machined and make it guideable. Disclosure of the invention

[0003] The invention is directed to a hand-held power tool workpiece protection device having the features of claim 1. The invention is based on a hand-held power tool workpiece protection device for a portable power tool, in particular for a grinding machine, having at least one spacer unit which is provided to ensure, during machining of a workpiece, a distance between a machining tool arranged on a tool holder of the portable power tool and an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.

[0004] It is proposed that the spacer unit comprise at least one spacer element that can be movably arranged on the portable machine tool, in particular a spacer element that can be removably arranged on the portable machine tool. "Provided" is to be understood, in particular, as specifically designed and / or specially equipped. The fact that an element and / or unit is provided for a specific function is to be understood, in particular, as meaning that the element and / or unit fulfills and / or performs this specific function in at least one application and / or operating state.Thus, the spacer unit is designed such that, during machining of a workpiece, the spacer unit ensures a distance between a machining tool arranged on a tool holder of a portable machine tool and an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool. For this purpose, the spacer element can preferably be arranged on the portable machine tool so as to be movable relative to the portable machine tool. Preferably, the spacer element can be arranged so as to be movable on a machine tool housing, in particular on a gear housing of the machine tool housing, of the portable machine tool. In this case, the spacer element can preferably be arranged rotatably on the portable machine tool.However, it is also conceivable for the spacer element to be arranged on the portable machine tool in a translationally movable manner to ensure a distance between a machining tool arranged on the tool holder of the portable machine tool and the element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by the machining tool. Thus, the spacer element is preferably movably mounted on the portable machine tool when arranged on the portable machine tool.

[0005] The expression “movably arranged or mounted” is intended here in particular to define the arrangeability or mounting of a unit and / or an element, wherein the unit and / or the element, in particular decoupled from an elastic deformation of the unit and / or the element, has the possibility of movement along at least one distance greater than 0.5 mm, preferably greater than 1 mm and particularly preferably greater than 5 mm and / or has the possibility of movement around at least one axis by an angle greater than 15°, preferably greater than 60° and particularly preferably greater than 120°. In this context, “removable” is understood to mean in particular non-destructively dismantled from the portable machine tool, in particular dismantled without tools. Particularly preferably, the spacer element can be arranged on the portable machine tool so as to be freely rotatable about a rotation axis of the spacer element.Preferably, the axis of rotation of the spacer element, at least in a state arranged on the portable machine tool, runs at least substantially parallel to a rotation axis of an output element of an output unit of the portable machine tool to a drive of the tool holder, in particular at least to a rotating drive or to an oscillating drive of the tool holder. Particularly preferably, the axis of rotation of the spacer element runs at least substantially parallel to a rotation axis of the tool holder, in particular of a grinding disc, of the portable machine tool. "Substantially parallel" is to be understood here in particular as an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation from the reference direction of in particular less than 8°, advantageously less than 5°, and particularly advantageously less than 2°.By means of the embodiment according to the invention, a movable stop can be advantageously realized which, in particular when machining a workpiece by means of a portable machine tool designed as a grinding machine, enables the stop to be gently struck against an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool, such as a door frame, a wall, a skirting board, etc. In addition, a rolling movement of the spacer element can be particularly advantageously enabled in order to avoid damage, such as the introduction of scratches, etc., to the element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.

[0006] Furthermore, it is proposed that the spacer unit comprise at least one further spacer element that can be movably arranged on the portable machine tool, in particular on the machine tool housing. Preferably, the further spacer element has a design analogous to the spacer element. This advantageously allows a large protective area to be created in which the spacer unit has a protective effect.

[0007] It is further proposed that the handheld power tool workpiece protection device comprise at least one connecting unit, by means of which the spacer element and the further spacer element can be connected to one another in a form-fitting and / or force-fitting manner. The spacer element and the further spacer element can preferably be connected to one another in a form-fitting and / or force-fitting manner by means of the connecting unit to form an arrangement on the portable power tool. The connecting unit preferably comprises at least one connecting element arranged on the spacer element and a mating connecting element arranged on the further spacer element, which interacts with the connecting element to create a form-fitting and / or force-fitting connection. The connecting element or the mating connecting element is preferably designed as a spring-elastic locking element or as a locking recess. Thus, the connecting unit is preferably designed as a locking unit.However, it is also conceivable for the connecting element and / or the counter-connecting element to have a different design that would appear appropriate to a person skilled in the art, such as a design as a bayonet closure element, a push-button closure element, a toggle lever closure element, etc. Thus, the connecting unit can alternatively be designed as a bayonet closure unit, a push-button closure unit, a toggle lever closure unit, etc. Furthermore, it is conceivable for the spacer unit to comprise only one spacer element that, due to its elastic deformability, can be arranged on the portable machine tool, in particular can be arranged removably on the portable machine tool. By means of the design according to the invention, a structurally simple removability of the spacer unit from the portable machine tool can advantageously be realized.In addition, a structurally simple and secure connection between the spacer element and the other spacer element can be advantageously realized.

[0008] It is also proposed that the spacer unit comprise at least one movement-activating element that can be arranged on the spacer element and is intended to cause movement of the spacer element and / or another spacer element of the spacer unit in at least one state. The movement-activating element is preferably formed from a material that has a high coefficient of friction. Thus, upon contact of the spacer element or the movement-activating element with an element that extends at least substantially transversely to a workpiece surface to be machined by the machining tool, friction can advantageously be used to move the spacer element relative to the portable machine tool. The movement-activating element can be formed from an elastomer, a foam rubber, a PUR foam, a felt, or another material that a person skilled in the art considers appropriate.The motion activation element can be formed integrally with the spacer element or separately from the spacer element. "Integral" is understood to mean, in particular, at least materially connected, for example, by a welding process, an adhesive process, an injection molding process, and / or another process deemed appropriate by a person skilled in the art, and / or advantageously formed in one piece, such as by production from a single casting and / or by production using a single- or multi-component injection molding process, and advantageously from a single blank.

[0009] Particularly preferably, the spacer unit comprises at least one further movement-activating element that can be arranged on the further spacer element and is intended to effect a movement of the spacer element and / or a further spacer element of the spacer unit in at least one state. However, it is also conceivable for the movement-activating element to be designed as an actuator, in particular as an electrical and / or mechanical actuator, which effects or triggers a movement of the spacer element as a result of a signal from a sensor that detects contact and / or a distance between the spacer element and an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.In this case, the spacer unit could comprise a spacer element drive unit, which is provided for driving, in particular for rotating, the spacer element in at least one state, wherein a rotational speed of the spacer element can be configured as a function of a machining feed movement of the portable power tool. By means of the inventive design of the hand-held power tool workpiece protection device, a reliable movement of the spacer element can advantageously be achieved, in particular a rolling movement of the spacer element on an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.

[0010] Furthermore, it is proposed that the movement activation element be detachably connected to the spacer element and / or to the further spacer element, in particular be detachably connected to the spacer element and / or to the further spacer element without the need for tools. In this case, the movement activation element is preferably connected to the spacer element by means of a force-locking and / or a form-locking connection, such as by means of a snap-in connection, etc. Thus, for example, the movement activation element can be exchanged for an alternative movement activation element that has a surface color tone analogous to a surface color tone of an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.Furthermore, the alternative movement activation element could additionally or alternatively comprise a material type and / or material quality suitable for the material type and / or material quality of the element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by the machining tool, which material type and / or material quality enable material-protecting contact between the spacer element and the element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by the machining tool. The configuration according to the invention advantageously enables quick and uncomplicated assembly and / or disassembly of the movement activation element. User-friendly handling can advantageously be achieved.In addition, it is particularly advantageous to enable the spacer element to be gently struck against an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.

[0011] It is further proposed that the spacer unit comprise at least one motion bearing element arranged on the spacer element and / or on the further spacer element of the spacer unit. The motion bearing element can be designed as a motion rolling bearing element or as a motion sliding bearing element. Preferably, the motion bearing element is designed as a motion rolling bearing element, such as a ball, a roller, a barrel, a needle, etc. A design of the motion bearing element as a motion sliding bearing element, such as a sliding layer bearing element, etc., is also conceivable. Preferably, the motion bearing element is arranged on a side of the spacer element and / or the further spacer element facing away from the movement activation element. This advantageously allows a low-friction arrangement of the spacer element and / or the further spacer element on the portable machine tool to be realized.

[0012] In addition, it is proposed that the spacer element and / or the further spacer element of the spacer unit has a circular ring segment-like design.

[0013] However, it is also conceivable for the spacer element and / or the further spacer element of the spacer unit to have a different configuration that would appear appropriate to a person skilled in the art, such as, for example, a polygonal configuration that is designed according to the invention to correspond to an outer contour of the portable machine tool, in particular to correspond to a spacer unit receiving area of ​​the portable machine tool. By means of the configuration according to the invention, a compact handheld power tool workpiece protection device can advantageously be realized that requires little installation space while simultaneously reliably ensuring that a distance is maintained between a machining tool arranged on a tool holder of a portable machine tool and an element that extends at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.

[0014] Furthermore, the invention is based on a handheld power tool system with at least one portable power tool, in particular a grinding machine, and with at least one handheld power tool workpiece protection device according to the invention. A "portable power tool" is to be understood here in particular as a machine tool for machining workpieces that can be transported by an operator without a transport machine. The portable power tool has in particular a mass that is less than 40 kg, preferably less than 10 kg, and particularly preferably less than 5 kg. The portable power tool is preferably designed as an eccentric grinding machine, in particular as an eccentric grinding machine for a rotating drive of a grinding disc.However, it is also conceivable for the portable machine tool to have a different design that appears expedient to a person skilled in the art, such as, for example, as a delta grinding machine, as an angle grinder, etc. By means of the design according to the invention, a high level of work safety and a high level of work efficiency can advantageously be achieved, in which a high level of protection of a machining tool arranged on a tool holder of a portable machine tool and an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool can be made possible.

[0015] It is further proposed that the portable machine tool have at least one motion guide element, by means of which at least the spacer unit can be guided during a relative movement in a state arranged on the portable machine tool. The motion guide element is preferably designed as a groove. However, it is also conceivable for the motion guide element to have another design that would be deemed appropriate by a person skilled in the art, such as a rib, a magnetic guide element, etc. The design according to the invention advantageously enables precise alignment of the spacer unit.

[0016] It is further proposed that the handheld power tool workpiece protection device, when arranged on the portable power tool, extends beyond the machining tool along at least one direction over an angular range greater than 60°, in particular greater than 120°, preferably greater than 180°, and particularly preferably greater than 220°. In this case, the handheld power tool workpiece protection device or the spacer unit extends beyond the machining tool along at least one direction running at least substantially perpendicular to the rotational axis of the spacer element and / or the further spacer element.The term "substantially perpendicular" is intended here to define, in particular, an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, particularly viewed in a plane, enclose an angle of 90°, and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. The design according to the invention advantageously enables reliable protection of the tool holder or of an element extending at least substantially transversely to a workpiece surface of the workpiece to be machined by means of the machining tool.

[0017] The handheld power tool workpiece protection device and / or the handheld power tool system according to the invention should not be limited to the application and embodiment described above. In particular, the handheld power tool workpiece protection device and / or the handheld power tool system according to the invention can have a number of individual elements, components, units, and method steps that differs from the number stated herein in order to fulfill a function described herein. drawing

[0018] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0019] They show: Fig. 1 a hand-held power tool system according to the invention with a portable power tool according to the invention and with a hand-held power tool workpiece protection device according to the invention during machining of a workpiece to be machined in a schematic representation, Fig. 2 a sectional view along line AA of Fig. 1 of the portable machine tool according to the invention with the hand-held power tool workpiece protection device according to the invention arranged on the portable machine tool according to the invention in a schematic representation and Fig. 3 a detailed view of the hand-held power tool workpiece protection device according to the invention in a schematic representation. Description of the embodiment

[0020] Fig. 1 shows a handheld power tool system 36 comprising at least one portable power tool 12 and at least one handheld power tool workpiece protection device 10. The portable power tool 12 is configured as an eccentric sander. The portable power tool 12 has a power tool housing 40 enclosing a drive unit 42 of the portable power tool 12 and a gear unit 44 of the portable power tool 12. The drive unit 42 and the gear unit 44 are provided to drive a machining tool 20 arranged on a tool holder 18 of the portable power tool 12. The tool holder 18 is configured as a sanding disc to which the machining tool 20 can be secured by means of a holding unit (not shown in detail here), such as a hook-and-loop fastener holding unit, a clamp holding unit, a self-adhesive holding unit, etc., in a manner already known to a person skilled in the art.The machining tool 20 is designed as a grinding wheel. However, it is also conceivable for the machining tool 20 to have another design that would be deemed appropriate by a person skilled in the art, such as a polishing wheel, etc. The tool holder 18 can be driven in an eccentrically oscillating and simultaneously rotating manner about a rotational axis 46 of the tool holder 18 by means of an interaction of the drive unit 42 and the gear unit 44 in a manner already known to a person skilled in the art. The gear unit 44 can be designed to be switchable, for example, to change the speed of the tool holder 18.However, it is also conceivable that the portable machine tool 12 is decoupled from the gear unit 44 and that the tool holder 18 can be driven by means of an eccentric bearing on an armature shaft (not shown in detail here) of the drive unit 42 in a manner already known to a person skilled in the art in an eccentrically oscillating and at the same time rotating manner about a rotation axis 46 of the tool holder 18.

[0021] The handheld power tool workpiece protection device 10 for the portable power tool 12 comprises at least one spacer unit 14, which is provided to ensure a distance between the machining tool 20 arranged on the tool holder 18 of the portable power tool 12 and an element 24 extending at least substantially transversely to a workpiece surface 22 of the workpiece 16 to be machined by the machining tool 20 during machining of a workpiece 16. For this purpose, the spacer unit 14 comprises at least one spacer element 26 that can be movably arranged on the portable power tool 12. Furthermore, the spacer unit 14 comprises at least one further spacer element 28 that can be movably arranged on the portable power tool 12. The spacer element 26 and / or the further spacer element 28 of the spacer unit 14 have / have a circular ring-segment-like design.Here, the spacer element 26 and / or the further spacer element 28 together form a circular ring. Thus, the spacer element 26 and the further spacer element 28 are each designed as a semicircular ring segment. However, it is also conceivable for the spacer element 26 and / or the further spacer element 28 to have a different design that would appear expedient to a person skilled in the art. The spacer element 26 and / or the further spacer element 28 has a design that corresponds to a receiving area 48 of the machine tool housing 40. The receiving area 48 is intended to at least partially accommodate the spacer unit 14 when arranged on the portable machine tool 12. Here, the receiving area 48 is arranged on a gear housing 50 of the machine tool housing 40.The receiving area 48 is arranged at an end of the gear housing 50 associated with the tool holder 18, on an outer side, in particular an outer circumference, of the gear housing 50. However, it is also conceivable for the receiving area 48 to be arranged on an inner side of the gear housing 50 and for the spacer unit 14 to extend beyond the gear housing 50 when arranged on the portable machine tool 12.

[0022] The portable machine tool 12 has at least one motion guide element 38, by means of which the distance unit 14 can be guided during a relative movement to the portable machine tool 12 in a state arranged on the portable machine tool 12. The motion guide element 38 is arranged in the receiving area 48. In this case, the motion guide element 38 is designed as a groove ( Fig. 2). The motion guide element 38 extends along a circumferential direction on the outer circumference of the gear housing 50. The circumferential direction runs in a plane that extends at least substantially perpendicular to the axis of rotation 46 of the tool holder 18. The motion guide element 38 extends along an entire circumferential extent of the outer circumference along the circumferential direction. However, it is also conceivable for the motion guide element 38 to extend only partially along the circumferential direction on the outer circumference. The hand-held power tool workpiece protection device 10 or the spacer unit 14 extends, in a state arranged on the portable power tool 12, at least along an angular range greater than 60° along at least one direction beyond the machining tool 20 or beyond the tool holder 18. In this case, the hand-held power tool workpiece protection device 10 orthe spacer unit 14 extends over an angular range of 360° along at least the direction beyond the machining tool 20 or beyond the tool holder 18. The direction along which the hand-held power tool workpiece protection device 10 or the spacer unit 14 extends beyond the machining tool 20 or beyond the tool holder 18 runs at least substantially perpendicular to the rotation axis 46 of the tool holder 18.

[0023] The hand-held power tool workpiece protection device 10 comprises at least one connecting unit 30, by means of which the spacer element 26 and the further spacer element 28 can be connected to one another in a form-fitting and / or force-fitting manner ( Fig. 3). Thus, the spacer unit 14 is arranged on the portable machine tool 12 by means of a connection between the spacer element 26 and the further spacer element 28, or is held captively on the gear housing 50 in the receiving area 48. The connecting unit 30 comprises at least one connecting element 52 arranged on the spacer element 26, which cooperates with at least one mating connecting element 54 arranged on the further spacer element 28 to form a positive and / or non-positive connection. The connecting element 52 is designed as a latching hook. The mating connecting element 54 is designed as a latching recess into which the connecting element 52 latches to form a positive and / or non-positive connection. In total, the connecting unit 30 has four connecting elements 52, 56, 58, 60. The four connecting elements 52, 56, 58, 60 have a mutually analogous design.Here, two of the four connecting elements 52, 56, 58, 60 are arranged on the spacer element 26, and two of the connecting elements 52, 56, 58, 60 are arranged on the further spacer element 28. Thus, the connecting unit 30 also has a total of four counter-connecting elements 54, 62, 64, 66. The four counter-connecting elements 54, 62, 64, 66 have a similar design. Here, two of the four counter-connecting elements 54, 62, 64, 66 are arranged on the spacer element 26, and two of the counter-connecting elements 54, 62, 64, 66 are arranged on the further spacer element 28. However, it is also conceivable that the connecting unit 30 has a number of connecting elements 52, 56, 58, 60 and / or counter-connecting elements 54, 62, 64, 66 that differs from four.

[0024] Furthermore, the spacer unit 14 comprises at least one movement activation element 32 that can be arranged on the spacer element 26 and is intended to cause a movement of the spacer element 26 and / or the further spacer element 28 of the spacer unit 14 in at least one state. The movement activation element 32 has a design corresponding to the spacer element 26. The movement activation element 32 is designed like a circular ring segment. Furthermore, the movement activation element 32, viewed in a state of the spacer unit 14 arranged on the portable machine tool 12, is arranged on a side of the spacer element 26 facing away from the portable machine tool 12. In this case, the movement activation element 32 is detachably connected to the spacer element 26. However, it is also conceivable for the movement activation element 32 to be formed integrally with the spacer element 26.The movement activation element 32 is formed from a material with a high coefficient of friction. Thus, upon contact between the movement activation element 32 and the element 24 extending at least substantially transversely to the workpiece surface 22 of the workpiece 16 to be machined by the machining tool 20, friction is utilized to move, in particular rotate, the spacer element 26 and / or the further spacer element 28 relative to the portable machine tool 12 when arranged on the portable machine tool 12.

[0025] The distance unit 14 further comprises a further movement activation element 68 that can be arranged on the further spacer element 28 and is intended to cause a movement of the spacer element 26 and / or the further spacer element 28 of the distance unit 14 in at least one state. The further movement activation element 68 has a design corresponding to the further spacer element 28. The further movement activation element 68 is designed like a circular ring segment. Furthermore, the further movement activation element 68, viewed in a state of the distance unit 14 arranged on the portable machine tool 12, is arranged on a side of the further spacer element 28 facing away from the portable machine tool 12. In this case, the further movement activation element 68 is detachably connected to the further spacer element 28.However, it is also conceivable for the further movement-activating element 68 to be formed integrally with the further spacer element 28. The further movement-activating element 68 is also formed from a material with a high coefficient of friction. Thus, upon contact of the further movement-activating element 68 with the element 24 extending at least substantially transversely to the workpiece surface 22 of the workpiece 16 to be machined by the machining tool 20, friction can be utilized to move the spacer element 26 and / or the further spacer element 28 relative to the portable machine tool 12 when arranged on the portable machine tool 12.

[0026] The movement activation element 32 and the further movement activation element 68 each form an outer half-ring of the spacer unit 14. Thus, when the spacer element 26 and the further spacer element 28 are connected by means of the connecting unit 30, the movement activation element 32 and the further movement activation element 68 form an outer ring of the spacer unit 14. The spacer element 26 and the further spacer element 28 each form an inner half-ring of the spacer unit 14. Thus, when the spacer element 26 and the further spacer element 28 are connected by means of the connecting unit 30, the spacer element 26 and the further spacer element 28 form an inner ring of the spacer unit 14.

[0027] Furthermore, the spacer unit 14 comprises at least one motion bearing element 34, which is arranged on the spacer element 26 and / or on the further spacer element 28 of the spacer unit 14. The motion bearing element 34 is designed as a motion roller bearing element. In this case, the motion bearing element 34 is designed as a roller element. Furthermore, the motion bearing element 34 is arranged on a side of the spacer element 26 or the further spacer element 28 facing away from the movement activation element 32 or the further movement activation element 68. For this purpose, the spacer element 26 or the further spacer element 28 comprises at least one motion bearing receptacle 70.Overall, the distance unit 14 comprises a plurality of movement bearing elements 34, each of which is arranged in a movement bearing receptacle 70 on the distance element 26 and / or on the further distance element 28 (in the illustrated embodiment, the distance unit 14 comprises a total of 10 movement activation elements 32, which are arranged partly on the distance element 26 and partly on the further distance element 28, cf. Fig. 3). The motion bearing elements 34 are rotatably mounted in the motion bearing receptacles 70. The motion bearing receptacles 70 are evenly distributed on the spacer element 26 and the further spacer element 28.

[0028] To arrange the spacer unit 14 on the portable machine tool 12, the spacer element 26 and the further spacer element 28 are arranged in the receiving area 48 of the machine tool housing 40. The motion bearing elements 34 are inserted into the motion guide element 38, which is designed as a groove. Thus, when the spacer unit 14 is arranged on the portable machine tool 12, the motion guide element 38 forms a rolling surface for the motion bearing elements 34. The spacer element 26 and the further spacer element 28 are connected to one another in a form-fitting and / or force-fitting manner by means of the connecting unit 30. Thus, the spacer unit 14 is movably arranged or mounted on the portable machine tool 12 as a result of the interaction of the motion bearing elements 34 and the motion guide element 38.As a result, depending on the movement activation element 32 and / or the further movement activation element 68 being in contact at least substantially transversely with the workpiece surface 22 of the element 24 to be machined and a feed direction 74 of the portable machine tool 12, a rotation of the spacer unit 14 in a direction of rotation 72 relative to the portable machine tool 12 is possible (. Fig. 1). A rolling movement of the movement-activating element 32 and / or the further movement-activating element 68 takes place on the element 24 extending at least substantially transversely to the workpiece surface 22 of the workpiece 16 to be machined, which causes a rotation of the spacer unit 14 in a rotational direction 72 relative to the portable machine tool 12.

Claims

[1] Hand-held power tool workpiece protection device for a portable power tool, in particular for a grinding machine, with at least one spacer unit (14) which is provided to ensure, during machining of a workpiece (16), a distance between a machining tool (20) arranged on a tool holder (18) of the portable power tool and an element (24) extending at least substantially transversely to a workpiece surface (22) of the workpiece (16) to be machined by means of the machining tool (20), characterized byin that the spacer unit (14) comprises at least one spacer element (26) which can be arranged movably on the portable machine tool, wherein the spacer element (26) has a design corresponding to a receiving area (48) of a machine tool housing (40), wherein the receiving area (48) is provided to at least partially receive the spacer unit (14) in a state arranged on the portable machine tool (12). [2] Hand tool workpiece protection device according to claim 1, characterized by that the spacer unit (14) comprises at least one further spacer element (28) which can be arranged movably on the portable machine tool. [3] Hand tool workpiece protection device according to claim 2, characterized by at least one connecting unit (30) by means of which the spacer element (26) and the further spacer element (28) can be connected to one another in a form-fitting and / or force-fitting manner. [4] Hand tool support device according to one of the preceding claims, characterized by that the distance unit (14) comprises at least one movement activation element (32) which can be arranged on the distance element (26) and which is intended to cause a movement of the distance element (26) and / or of a further distance element (28) of the distance unit (14) in at least one state. [5] Hand tool workpiece protection device according to claim 4, characterized by that the movement activation element (32) is detachably connected to the spacer element (26) and / or to the further spacer element (28). [6] Hand-held power tool workpiece protection device according to one of the preceding claims, characterized by that the spacer unit (14) comprises at least one movement bearing element (34) which is arranged on the spacer element (26) and / or on a further spacer element (28) of the spacer unit (14). [7] Hand-held power tool workpiece protection device according to one of the preceding claims, characterized by that the spacer element (26) and / or a further spacer element (28) of the spacer unit (14) has / has a circular ring segment-like design. [8] Hand-held power tool system with at least one portable power tool, in particular a grinding machine, and with at least one hand-held power tool workpiece protection device according to one of the preceding claims. [9] Hand tool system according to claim 8, characterized by that the portable machine tool has at least one movement guide element (38) by means of which at least the distance unit (14) can be guided during a relative movement in a state arranged on the portable machine tool. [10] Hand tool system according to claim 8 or 9, characterized byin that the hand-held power tool workpiece protection device, when arranged on the portable power tool, extends beyond the machining tool (20) at least along an angular range greater than 60° along at least one direction. [11] Portable machine tool, in particular a grinding machine, of a hand-held power tool system according to one of claims 8 to 10.

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