machine tool

Abstract

Machine tool, in particular table saw, with at least one drive unit (12a; 12b), with at least one workpiece support unit (14a; 14b) for supporting a workpiece during machining, with at least one linear bearing unit (16a; 16b) for at least a translationally movable bearing of the drive unit (12a; 12b) relative to the workpiece support unit (14a; 14b) and with at least one swivel bearing unit (18a; 18b) for at least a pivotable bearing of the drive unit (12a; 12b) relative to the workpiece support unit (14a; 14b), wherein the swivel bearing unit (18a; 18b) comprises at least one swivel guide element (20a; 20b) which is at least partially formed in one piece with a linear guide element (22a; 22b) of the linear bearing unit (16a; 16b) and a toothed element (24a; 24b) which is attached to the linear guide element (22a;22b) is arranged, comprising, characterized in that the pivot guide element (20b) forms the toothed element (24b) which is formed integrally with the linear guide element (22b).

Description

State of the art

[0001] Machine tools are already known, for example from US 2013 / 0 081 526 A1, US 2004 / 0 200 330 A1 and EP 0 988 126 B1, which comprise a drive unit, a workpiece support unit for supporting a workpiece during machining, a linear bearing unit for a translationally movable bearing of the drive unit relative to the workpiece support unit, and a swivel bearing unit for a swiveling bearing of the drive unit relative to the workpiece support unit. Furthermore, a swivel unit with a toothed gear is known from DE 10 2011 005 020 A1. Disclosure of the invention

[0002] The invention relates to a machine tool, in particular a table saw, with at least one drive unit, with at least one workpiece support unit for supporting a workpiece during machining, with at least one linear bearing unit at least to a translationally movable bearing of the drive unit relative to the workpiece support unit and with at least one pivot bearing unit at least to a pivotable bearing of the drive unit relative to the workpiece support unit.

[0003] It is proposed that the pivot bearing unit comprise at least one pivot guide element, which is at least partially integrally formed with a linear guide element of the linear bearing unit. The machine tool is preferably configured as a "benchtop machine tool." In this case, the machine tool is preferably configured as a table saw, an underfloor saw, and / or an underfloor pull saw. However, it is also conceivable that the machine tool has a different configuration that would appear advantageous to a person skilled in the art. The machine tool has a mass that is less than 60 kg, preferably less than 40 kg, and particularly preferably less than 30 kg. Preferably, the machine tool is configured as a stationary machine tool that can be moved by an operator without the need for a transport vehicle.

[0004] The term "workpiece support unit" here refers in particular to a unit that has at least one workpiece support surface on which a workpiece can be placed for machining. Preferably, the workpiece support unit has at least one stop element, in particular a stop rail, against which the workpiece can be positioned to achieve a precise cut during machining. The workpiece support unit is most preferably formed by a machine tool table, in particular by a machine tool table top. In this case, the workpiece support unit is preferably made of aluminum. However, it is also conceivable that the workpiece support unit is made of another material that would be suitable to a person skilled in the art. Preferably, the workpiece support unit includes at least one tool recess through which a machining tool extends, at least in one operating state.The term "extend through" is intended here to define, in particular, an arrangement of a component relative to another component, wherein the component is arranged in a tool recess of the other component in at least one operating state and extends beyond at least one edge region of the other component that delimits the tool recess in at least one operating state. Preferably, the machining tool extends through the tool recess along a direction that is at least substantially perpendicular to the workpiece support surface. For machining a workpiece, the machine tool is preferably placed on a suitable surface, such as a worktop and / or a production hall floor, etc., provided the machine tool is handled properly and its contact surface is on the ground.

[0005] The pivoting guide element is preferably designed to positively guide the drive unit during a pivoting movement about a pivot axis of the pivot bearing unit. The linear guide element is preferably designed to positively guide the drive unit during a linear movement along a linear axis of the linear bearing unit. "Designed" is understood to mean, in particular, specifically designed and / or specially equipped. The fact that an object and / or unit is designed for a specific function is understood to mean, in particular, that the object and / or unit fulfills and / or performs this specific function in at least one application and / or operating condition.The term "one-piece" is to be understood in particular as being joined by at least a material bond, for example by a welding process, an adhesive bonding process, an injection molding process, and / or another process that would appear appropriate to a person skilled in the art, and / or advantageously formed in one piece, such as by manufacturing from a single casting and / or by manufacturing using a single- or multi-component injection molding process, and advantageously from a single blank. The inventive design of the machine tool advantageously allows for savings in components, assembly costs, and assembly effort. Thus, a cost-effective machine tool with a linear bearing unit and a swivel bearing unit can be realized. Furthermore, a convenient functional integration of a swivel guide function into the linear bearing unit can be advantageously achieved.

[0006] According to the invention, the pivot bearing unit comprises at least one toothed element arranged on the linear guide element. Preferably, the toothed element is arranged directly on the linear guide element. The toothed element can be freely movably mounted on the linear guide element. Thus, it is conceivable that the toothed element is designed as a gear ring or as a gear that is rotatably mounted on the linear guide element. In one embodiment of the machine tool, the linear guide element can preferably be formed integrally with a pivot guide element of the pivot guide unit, which is designed as a bearing element. The inventive design of the machine tool allows for simple adjustment of a pivot angle, and in particular, reliable guidance during adjustment of a pivot angle can be advantageously achieved.Furthermore, a safe setting of a swivel angle can be advantageously achieved.

[0007] Furthermore, it is proposed that the pivot bearing unit comprises at least one additional toothed element arranged on the linear guide element. Preferably, the additional toothed element is also arranged directly on the linear guide element. Here, the additional toothed element can be freely movably mounted on the linear guide element. Thus, it is conceivable that the additional toothed element is designed as a gear ring or as a gear that is rotatably mounted on the linear guide element. In one embodiment of the machine tool, the linear guide element can be formed integrally with a pivot guide element of the pivot guide unit, which is designed as a bearing element. The additional toothed element is preferably arranged at an end of the linear guide element that faces away from another end of the linear guide element where the toothed element is located.The design according to the invention advantageously enables precise adjustment of a swivel angle, since synchronous movement of the gear element and the further gear element can be easily achieved structurally. This allows for particularly cost-effective synchronization of the swivel motion guidance.

[0008] Furthermore, in a preferred embodiment of the machine tool according to the invention, it is proposed that the gear element and / or the further gear element are / are rotationally fixed to the linear guide element. "Rotationally fixed" is understood to mean, in particular, a connection that transmits a power flow with an unchanged torque, direction of rotation, and / or speed averaged over a complete revolution. The gear element and / or the further gear element can be rotationally fixed to the linear guide element by means of an interference fit, such as through shrink-fitting; by means of a material-bonded connection, such as through a welding or bonding process; by means of a positive-locking connection, such as through a keyway connection or a splined shaft profile, etc.Thus, in the preferred embodiment, the linear guide element is preferably formed integrally with a pivoting guide element designed as a gear-receiving element. By means of the embodiment according to the invention, synchronous movement of the gear element and / or the further gear element can advantageously be achieved as a result of movement of the linear guide element and / or the pivoting guide element. Thus, the gear element is structurally and simply connected to the further gear element in terms of motion. This enables advantageous motion transmission between the gear element and the further gear element.

[0009] According to the invention, the pivot guide element forms the gearing element, which is integrally formed with the linear guide element. Particularly preferably, the pivot bearing unit comprises at least one further pivot guide element, which forms the additional gearing element and is integrally formed with the linear guide element. This allows for a particularly cost-effective pivot guide unit. Furthermore, assembly costs, assembly effort, and the number of components can be advantageously reduced.

[0010] Furthermore, it is proposed that the linear guide element be rotatably mounted. Preferably, the linear guide element, which is formed integrally with the pivot guide element, is rotatably mounted about a rotational axis that runs at least substantially parallel to the workpiece support surface of the workpiece support unit. "Substantially parallel" here refers in particular to an alignment of a direction relative to a reference direction, especially in a plane, wherein the direction has a deviation from the reference direction of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°. Preferably, a pivoting movement of the drive unit relative to the workpiece support unit is initiated and / or executed as a result of a rotational movement of the linear guide element about the rotational axis.By means of the inventive design of the machine tool, a structurally simple swivel bearing unit can advantageously be realized.

[0011] Furthermore, it is proposed that the linear guide element be designed as a guide rod. However, it is also conceivable that the linear guide element has a different design that would appear advantageous to a person skilled in the art, such as a design as a guide rail, etc. The design according to the invention advantageously allows for a rotationally symmetrical linear guide element that enables precise and smooth linear guidance of the drive unit in any position of the linear guide element.

[0012] Furthermore, it is proposed that the pivot bearing unit has at least one pivot axis that runs at least substantially parallel to a workpiece support surface of the workpiece support unit. Preferably, the pivot bearing unit is designed to allow the drive unit to pivot from a central position in only one direction by an angle greater than 15°, preferably greater than 30°, and particularly preferably greater than 40°. In a preferred embodiment of the invention, the pivot bearing unit is designed to allow the drive unit to pivot relative to the workpiece support unit from a central position in only one direction by an angle less than 50°.However, it is also conceivable that the pivot bearing unit is designed to pivot the drive unit from a central position in two opposite directions by an angle greater than 15°, preferably greater than 30°, and particularly preferably greater than 40°. The design according to the invention advantageously allows for a high degree of flexibility when machining a workpiece, particularly with regard to adjusting the position of a machining tool device driven by the drive unit for machining the workpiece.

[0013] Furthermore, it is proposed that the linear bearing unit has at least one linear motion axis that runs at least substantially parallel to a pivot axis of the pivot bearing unit. This advantageously allows for a compact machine tool.

[0014] Furthermore, a machine tool system is proposed comprising at least one machine tool according to the invention and at least one machining tool device, which includes at least one cutting strand and at least one guide unit. A "cutting strand" is understood here to be, in particular, a unit designed to locally disrupt the atomic cohesion of a workpiece to be machined, especially by mechanical separation and / or by mechanical removal of material particles from the workpiece. Preferably, the cutting strand is designed to separate the workpiece into at least two physically separate parts and / or to at least partially separate and / or remove material particles from the workpiece starting from a surface of the workpiece. Particularly preferably, the cutting strand is moved circumferentially in at least one operating state, especially along a circumference of the guide unit.In this context, a "guiding unit" is understood to be, in particular, a unit designed to exert a constraint force on the cutting strand at least along one direction perpendicular to a cutting direction of the cutting strand, in order to define a possibility of movement of the cutting strand along the cutting direction. Preferably, the guiding unit has at least one guide element, in particular a guide groove, through which the cutting strand is guided. Preferably, the cutting strand, viewed in a cutting plane, is guided along an entire circumference of the guiding unit by means of the guide element, in particular the guide groove. The term "cutting plane" is intended here to define, in particular, a plane in which the cutting strand, in at least one operating state, is moved along a circumference of the guiding unit in at least two mutually opposite cutting directions relative to the guiding unit.Preferably, when machining a workpiece, the cutting plane is oriented at least substantially transversely to the workpiece surface being machined. "At least substantially transversely" here refers in particular to an orientation of a plane and / or direction relative to another plane and / or direction, which preferably deviates from a parallel orientation of the plane and / or direction relative to the other plane and / or direction. However, it is also conceivable that the cutting plane is oriented at least substantially parallel to the workpiece surface being machined, especially when the cutting edge is designed as an abrasive, etc.

[0015] The term "cutting direction" here refers in particular to the direction along which the cutting strand is moved in at least one operating state as a result of a driving force and / or a driving torque, especially in the guide unit, to create a cutting gap and / or to separate and / or to remove material particles from a workpiece to be machined. Preferably, the cutting strand is moved along the cutting direction relative to the guide unit in one operating state. The cutting strand and the guide unit preferably form a closed system.The term "closed system" is used here to define, in particular, a system comprising at least two components that, through interaction, retain functionality in a disassembled state of the system from a higher-level system, such as a machine tool, and / or that are inextricably connected to one another in a state disassembled from the machine tool, especially from a tool holder of the machine tool. Preferably, the at least two components of the closed system are connected to one another in a way that is at least substantially inseparable for an operator. "At least substantially inseparable" here is understood to mean, in particular, a connection of at least two components that can only be separated with the aid of cutting tools, such as a saw, especially a mechanical saw, etc., and / or chemical separating agents, such as solvents, etc., are separable from one another. By means of the inventive design of the machine tool system, a compact machine tool can advantageously be realized which enables a high removal rate of workpiece particles.

[0016] The machine tool and / or machine tool system according to the invention should not be limited to the application and embodiment described above. In particular, the machine tool and / or machine tool system according to the invention may, in order to fulfill a function described herein, have a different number of individual elements, components and units than the number mentioned herein. drawing

[0017] Further advantages will become apparent from the following description of the drawings. The drawings illustrate two exemplary embodiments 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.

[0018] They show: Fig. 1 a machine tool according to the invention in a schematic representation, Fig. 2 a sectional view of the machine tool according to the invention in a schematic representation, Fig. 3 a detailed view of a machining tool device of a machine tool system according to the invention in a state disassembled from the machine tool according to the invention in a schematic representation and Fig. 4 A sectional view of an alternative machine tool in a schematic representation. Description of the exemplary implementations

[0019] Fig. Figure 1 shows a machine tool 10a designed as a table saw, in particular as an underfloor pull saw. The machine tool 10a has at least one workpiece support unit 14a for supporting a workpiece during machining, at least one linear bearing unit 16a for at least a translationally movable bearing of the drive unit 12a relative to the workpiece support unit 14a, and at least one pivot bearing unit 18a for at least a pivotable bearing of the drive unit 12a relative to the workpiece support unit 14a. The workpiece support unit 14a is designed as a tool table top. Furthermore, the workpiece support unit 14a is arranged on a base unit 42a of the machine tool 10a.The machine tool 10a is designed for machining workpieces (not shown in detail here) by being placed on a suitable surface, such as a workbench and / or a production hall floor, etc., using a base contact surface 44a of the machine tool 10a, provided it is handled correctly. For this purpose, the machine tool 10a includes support feet 46a, 48a, 50a, 52a, which are arranged on the workpiece support unit 14a and / or on the base unit 42a. Thus, the base contact surface 44a is formed by at least one support surface of a support foot 46a, 48a, 50a, 52a. The support feet 46a, 48a, 50a, 52a may be extendable. The workpiece support unit 14a is designed to support a workpiece during machining using a machining tool device 36a ( Fig. 2 and Fig. 3) provided. Here, the workpiece support unit 14a has at least two stop elements against which a workpiece to be machined can be placed for guidance. The stop elements are adjustable and / or movably arranged on a workpiece support surface 30a of the workpiece support unit 14a by means of guide grooves (not shown in detail here). In addition, the machine tool 10a includes a tool holder 60a ( Fig. 2), by means of which the machining tool device 36a can be fixed on one side to the machine tool 10a for machining a workpiece by means of a positive locking and / or by means of a force locking connection.

[0020] The machining tool device 36a extends through the workpiece support surface 30a of the workpiece support unit 14a in at least one operating state, in particular in a state arranged on the tool holder 60a of the machine tool 10a. The workpiece support unit 14a has a recess in the workpiece support surface 30a ( Fig. 2) through which the machining tool device 36a, in a state arranged at the tool holder 60a, extends at least substantially perpendicular to the workpiece support surface 30a through the workpiece support surface 30a. The drive unit 12a and a gear unit 62a of the machine tool 10a are operatively connected to each other in a manner known to a person skilled in the art to generate a drive torque transmissible to the machining tool device 36a. The drive unit 12a and / or the gear unit 62a are designed to be coupled to a cutting strand 38a of the machining tool device 36a in a state of the machining tool device 36a arranged at the tool holder 60a. The gear unit 62a is designed as a bevel gear. The drive unit 12a is designed as an electric motor unit.However, it is also conceivable that the drive unit 12a and / or the gear unit 62a have a different design that would appear sensible to a person skilled in the art. Furthermore, it is also conceivable that the drive unit 12a can be coupled directly to the machining tool device 36a, decoupled from the gear unit 62a. The machine tool 10a and the machining tool device 36a, which comprises at least the cutting strand 38a and at least one guide unit 40a for guiding the cutting strand 38a, together form a machine tool system 34a.

[0021] The drive unit 12a is movably mounted by means of the linear bearing unit 16a along a linear motion axis 32a of the linear bearing unit 16a, which runs at least substantially parallel to the workpiece support surface 30a of the workpiece support unit 14a. The linear bearing unit 16a has at least the linear motion axis 32a, which runs at least substantially parallel to a pivot axis 28a of the pivot bearing unit 18a. Thus, the machining tool device 36a, in a state arranged on the machine tool 10a, in particular in a state arranged on the tool holder 60a, is movably mounted by means of the linear bearing unit 16a along the linear motion axis 32a of the linear bearing unit 16a, which runs at least substantially parallel to the workpiece support surface 30a of the workpiece support unit 14a.The machining tool device 36a is thus mounted, at least together with the drive unit 12a of the machine tool 10a, so as to be linearly movable along the linear axis of motion 32a, which runs at least substantially parallel to the workpiece support surface 30a, relative to the workpiece support unit 14a. The linear bearing unit 16a comprises at least one linear guide element 22a for this purpose. The linear guide element 22a is designed as a guide rod. The machine tool 10a comprises at least one receiving housing 64a for receiving and / or supporting the drive unit 12a and the gear unit 62a. The receiving housing 64a is mounted so as to be translationally movable on the linear guide element 22a. For this purpose, the receiving housing 64a comprises at least two bearing bushing elements 66a, 68a, through which the linear guide element 22a extends, at least in an assembled state of the machine tool 10a.However, it is also conceivable that the receiving housing 64a has a different number of bearing bushing elements 66a, 68a than the two specified. Thus, at least the drive unit 12a, together with the receiving housing 64a, is mounted so as to be translationally movable relative to the workpiece support unit 14a. Furthermore, the linear guide element 22a is rotatably mounted. Here, the linear guide element 22a is rotatably mounted at one end in a bearing element 72a, 74a of the pivot bearing unit 18a. The bearing elements 72a, 74a are arranged on two spaced-apart side wall sections 82a, 84a of the base body unit 42a. The bearing elements 72a, 74a are fixed along the linear movement axis 32a and pivotable about the pivot axis 28a on the side wall sections 82a, 84a. The linear bearing unit 16a further comprises an additional linear guide element 76a, on which the receiving housing 64a can be guided. The additional linear guide element 76a is also designed as a guide rod.Furthermore, the additional linear guide element 76a is rigidly connected at one end to one of the bearing elements 72a, 74a. The additional linear guide element 76a is aligned at least substantially parallel to the linear guide element 76a.

[0022] Furthermore, the drive unit 12a is pivotably mounted by means of the pivot bearing unit 18a about the pivot axis 28a of the pivot bearing unit 18a, which runs at least substantially parallel to the workpiece support surface 30a of the workpiece support unit 14a. Thus, the pivot bearing unit 18a has at least one pivot axis 28a that runs at least substantially parallel to the workpiece support surface 30a of the workpiece support unit 14a. The machining tool device 36a is pivotably mounted in a state arranged on the machine tool 10a about the pivot axis 28a, which runs at least substantially parallel to the workpiece support surface 30a of the workpiece support unit 14a. During a pivoting movement of the machining tool device 36a relative to the workpiece support unit 14a, a cutting plane of the cutting strand 38a is tilted relative to the workpiece support surface 30a.The machining tool 36a can be pivoted in one direction relative to the workpiece support unit 14a from a central position. For this purpose, the drive unit 12a is pivotably mounted in one direction relative to the workpiece support unit 14a from a central position by means of the pivot bearing unit 18a. In the central position of the machining tool 36a, the cutting plane of the cutting strand 38a extends at least substantially perpendicular to the workpiece support surface 30a. The machining tool 36a can be pivoted from the central position by an angle of less than 50° about the pivot axis 28a. For this purpose, the mounting housing 64a is pivotably mounted relative to the workpiece support unit 14a by means of the pivot bearing unit 18a.However, it is also conceivable that the machining tool device 36a can be pivoted from a central position of the machining tool device 36a by an angle of less than 50° in two opposite directions relative to the workpiece support unit 14a.

[0023] The pivot bearing unit 18a comprises at least one cam element 58a, which is arranged on the workpiece support unit 14a and / or on the base body unit 42a. The cam element 58a is arranged on the side wall section 82a of the base body unit 42a. The cam element 58a extends in a plane that is at least substantially perpendicular to the workpiece support unit 14a. The cam element 58a is designed as a cam track. The cam element 58a has a circular arc shape. Furthermore, the cam element 58a is rigidly connected to the workpiece support unit 14a by means of the side wall section 82a. The cam element 58a is designed to interact with a cam engagement element 70a of the pivot bearing unit 18a. The cam engagement element 70a is designed as a cam block. In addition, the cam engagement element 70a is arranged on one of the bearing elements 72a, 74a.Furthermore, the pivot bearing unit 18a comprises at least one additional cam element 78a, which is arranged on the workpiece support unit 14a and / or on the base unit 42a. The additional cam element 78a is arranged on the additional side wall section 84a of the base unit 42a. The side wall section 82a and the additional side wall section 84a are arranged on opposite sides of the machine tool 10a. The additional cam element 78a extends in a plane that is at least substantially perpendicular to the workpiece support unit 14a. The additional cam element 78a is designed as a cam track. The additional cam element 78a has a circular arc shape. Furthermore, the additional cam element 78a is rigidly connected to the workpiece support unit 14a by means of the additional side wall section 84a.The additional cam element 78a is designed to interact with another cam engagement element 80a of the pivot bearing unit 18a.

[0024] The further cam engagement element 80a is designed as a cam block. Furthermore, the further cam engagement element 80a is arranged on one of the bearing elements 72a, 74a.

[0025] Furthermore, the pivot bearing unit 18a comprises at least one toothed element 24a arranged on the linear guide element 22a. The toothed element 24a is designed as a gear or a toothed ring. The toothed element 24a is rotationally fixed to the linear guide element 22a. Thus, the linear guide element 22a forms a pivot guide element 20a designed as a toothed receiving element. Therefore, the pivot bearing unit 18a comprises at least one pivot guide element 20a, which is at least partially formed integrally with the linear guide element 22a of the linear bearing unit 16a. The toothed element 24a is designed to engage with a mating tooth 86a of the pivot bearing unit 18a, which is arranged on the side wall part 82a. The mating tooth 86a has a circular arc shape that runs at least substantially parallel to the path of the cam element 58a.

[0026] The pivot bearing unit 18a comprises at least one further gear element 26a, which is arranged on the linear guide element 22a. The further gear element 26a is rotationally fixed to the linear guide element 22a. Here, the gear element 24a and the further gear element 26a are each rotationally fixed to the linear guide element 22a by means of an interference fit. However, it is also conceivable that the gear element 24a and the further gear element 26a are rotationally fixed to the linear guide element 22a by means of another connection that would appear sensible to a person skilled in the art. In this case, the further gear element 26a is arranged at an end of the linear guide element 22a that faces away from the end of the linear guide element 22a on which the gear element 24a is arranged. The further gear element 26a is also designed as a gear or as a gear ring.Furthermore, the additional gear element 26a is designed to interact with a further mating gear 88a of the swivel bearing unit 18a. The further mating gear 88a is adjustably arranged on the further side wall part 84a. Due to the adjustable arrangement of the further mating gear 88a, manufacturing tolerances can be compensated for. The further mating gear 88a has a circular arc shape that runs at least substantially parallel to the path of the further cam element 78a. As a result of a rotation of the linear guide element 22a and thus of the swivel guide element 20a, the drive unit 12a can be swivelled relative to the workpiece support unit 14a.In this process, the gear element 24a and the further gear element 26a, which rotate together with the linear guide element 22a, interact with the counter gear 86a and the further counter gear 88a, thereby generating a force for a pivoting movement of the drive unit 12a and the receiving housing 64a.

[0027] Fig. Figure 3 shows the machining tool device 36a in a state decoupled from the tool holder 60a. The cutting strand 38a and the guide unit 40a together form a closed system. The guide unit 40a is designed as a guide rail. The cutting strand 38a is guided by the guide unit 40a during a rotational movement around the guide unit 40a. For this purpose, the guide unit 40a has at least one guide element. The guide element of the guide unit 40a is designed as a guide groove that extends in a cutting plane of the cutting strand 38a along a circumference of the guide unit 40a. The cutting strand 38a is guided by means of the edge regions of the guide unit 40a that define the guide groove.However, it is also conceivable that the guide element of the guide unit 40a is designed in a different manner, which would appear sensible to a person skilled in the art, such as a rib-like projection on the guide unit 40a that engages in a recess on the cutting strand 38a. Viewed in a plane perpendicular to the cutting plane, the cutting strand 38a is surrounded on three sides by the edge regions that define the guide groove. During operation, the cutting strand 38a is moved circumferentially around its circumference in the guide groove relative to the guide unit 40a.

[0028] Furthermore, the machining tool device 36a has a coupling recess 90a into which, in a state arranged on the tool holder 60a, a drive gear of the tool holder 60a and / or the gear unit 62a engages, which can be connected to the cutting strand 38a for drive purposes. However, it is also conceivable that the machining tool device 36a has a torque transmission element mounted in the guide unit 40a, into which a shaft of the tool holder 60a and / or the gear unit 62a engages, etc. The cutting strand 38a comprises a plurality of interconnected cutting element carriers 92, 94, each of which is connected to the other by means of a connecting element (not shown in detail here) of the cutting strand 38a. Depending on the application, a person skilled in the art will select a suitable number of cutting element carriers 92a, 94a for the cutting strand 38a.The cutting element carriers 92a, 94a of the cutting strand 38a each have a recess which, in an assembled state, is located on the side of the respective cutting element carrier 92a, 94a facing the drive gear. The drive gear of the tool holder 60a and / or the gear unit 62a engages in the recesses to drive the cutting strand 38a in at least one operating state. Furthermore, the cutting strand 38a has cutting elements 54a, 56a. The cutting elements 54a, 56a are each formed integrally with one of the cutting element carriers 92a, 94a. However, it is also conceivable that the cutting elements 54a, 56a are formed separately from the cutting element carriers 92a, 94a. The number of cutting elements 54a, 56a depends on the number of cutting element carriers 92a, 94a. Depending on the number of cutting element carrier elements 92a, 94a, a specialist will select a suitable number of cutting elements 54a, 56a.The cutting elements 54a, 56a are designed to enable the separation and / or removal of material particles from a workpiece being machined. The cutting elements 54a, 56a can, for example, be designed as full chisels, semi-chisels, or other cutting edge types deemed appropriate by a person skilled in the art, which are designed to enable the separation and / or removal of material particles from a workpiece being machined. The cutting strand 38a is continuous. Thus, the cutting strand 38a is designed as a cutting chain. The cutting element carriers 92a, 94a are designed as chain links connected to each other by means of the connecting elements. However, it is also conceivable that the cutting strand 38a, the cutting element carriers 92a, 94a, and / or the connecting elements are designed in a different manner deemed appropriate by a person skilled in the art.

[0029] In Fig. Figure 4 shows an alternative embodiment. Essentially identical components, features, and functions are generally numbered with the same reference numerals. To distinguish the embodiments, the letters a and b have been added to the reference numerals of the embodiments. The following description is essentially limited to the differences compared to the embodiment shown in the Fig. 1 to 3 described, first embodiment, whereby with regard to unchanged components, features and functions, reference is made to the description of the first embodiment in the Fig. 1 to 3 can be referred to.

[0030] Fig. Figure 4 shows a sectional view of an alternative machine tool 10b. The machine tool 10b is designed as a table saw, specifically as an underfloor pull saw. The machine tool 10b comprises at least one drive unit 12b, at least one workpiece support unit 14b for supporting a workpiece during machining, at least one linear bearing unit 16b for at least a translationally movable bearing of the drive unit 12b relative to the workpiece support unit 14b, and at least one pivot bearing unit 18b for at least a pivotable bearing of the drive unit 12b relative to the workpiece support unit 14b. Thus, the machine tool 10b has the following features: Fig. 4. Machine tool 10b, shown, has at least an essentially analogous design to that shown in the Fig. 1 and Fig. 2 machine tool 10a shown. In contrast to the one shown in the Fig. 1 and Fig. The machine tool 10a shown in Figure 2 has the swivel bearing unit 18b of which is shown in Figure 2. Fig. The machine tool 10b shown in Figure 4 includes at least one swivel guide element 20b, which forms a toothed element 24b of the swivel bearing unit 18b, which is integrally formed with the linear guide element 22b. Thus, the swivel bearing unit 18b comprises at least one swivel guide element 20b, which is at least partially integrally formed with a linear guide element 22b of the linear bearing unit 16b. Furthermore, the swivel bearing unit 18b comprises at least one further swivel guide element (not shown in detail here), which forms a toothed element of the swivel bearing unit 18b, which is integrally formed with the linear guide element 22b. The toothed element 24b and the further toothed element can be integrally formed with the linear guide element 22b by means of a primary forming process, a forming process, a machining process, a milling process, etc. Regarding further functions and features of the [machine tool 10b] shown in Figure 4, see Figure 4. Fig. The machine tool 10b shown in section 4 may be described in the following sections. Fig. 1 and Fig. Reference is made to the machine tool 10a shown in section 2.

Claims

[1] Machine tool, in particular table saw, with at least one drive unit (12a; 12b), with at least one workpiece support unit (14a; 14b) for supporting a workpiece during machining, with at least one linear bearing unit (16a; 16b) for at least a translationally movable bearing of the drive unit (12a; 12b) relative to the workpiece support unit (14a; 14b) and with at least one pivot bearing unit (18a; 18b) for at least a pivotable bearing of the drive unit (12a; 12b) relative to the workpiece support unit (14a; 14b), wherein the pivot bearing unit (18a; 18b) comprises at least one pivot guide element (20a; 20b) which is at least partially formed in one piece with a linear guide element (22a; 22b) of the linear bearing unit (16a; 16b) and a toothed element (24a; 24b) which is attached to the linear guide element (22a; 22b) is ordered, includes, characterized by, that the pivot guide element (20b) forms the gear element (24b) which is formed in one piece with the linear guide element (22b). [2] Machine tool according to claim 1, characterized by , that the pivot bearing unit (18a) comprises at least one further gear element (26a) which is arranged on the linear guide element (22a). [3] Machine tool according to claims 1 and 2 characterized by , that the gear element (24a; 24b) and / or the further gear element (26a) are / is rotationally fixed to the linear guide element (22a; 22b). [4] Machine tool according to one of the preceding claims, characterized by , that the linear guide element (22a; 22b) is rotatably mounted. [5] Machine tool according to any one of the preceding claims, characterized by , that the linear guide element (22a; 22b) is designed as a guide rod. [6] Machine tool according to one of the preceding claims, characterized by, that the pivot bearing unit (18a; 18b) has at least one pivot axis (28a; 28b) which runs at least substantially parallel to a workpiece support surface (30a; 30b) of the workpiece support unit (14a; 14b). [7] Machine tool according to one of the preceding claims, characterized by , that the linear bearing unit (16a; 16b) has at least one linear motion axis (32a; 32b) which runs at least substantially parallel to a pivot axis (28a; 28b) of the pivot bearing unit (18a; 18b). [8] Machine tool system comprising at least one machine tool according to one of the preceding claims and comprising at least one machining tool device (36a) comprising at least one cutting strand (38a) and at least one guide unit (40a).

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