Excavator arm

Abstract

The invention relates to an excavator arm (1). The excavator arm (1) has a boom coupling portion (2) which is adapted to a boom (3) and to an arm actuator (4) of an excavator in such a way that the excavator arm (1) can be pivotably fastened to the boom (3) by means of the excavator coupling portion (2), and the arm actuator (4) can be articulated on the excavator arm (1) in such a way that the excavator arm (1) can be displaced by means of the arm actuator (4) within a grabbing plane (5) of the excavator. The grabbing plane (5) is defined by a boom longitudinal axis (6) and an arm longitudinal axis (7). The excavator arm (1) has a bucket actuator (8) which is articulated on the excavator arm (1) at a distance from the boom coupling portion (2). The excavator arm (1) has a tilt actuator (10) with a bearing portion (11) and an articulation portion (12). The tilt actuator (10) is pivotably fastened to the excavator arm (1) by means of the bearing portion (11). The bucket actuator (8) is articulated, in the articulation portion (12), on the tilt actuator (10) in such a way that the tilt actuator (10) can be displaced by means of the bucket actuator (8) within the grabbing plane (5). The tilt actuator (10) has a device receptacle (18) to which an attachment device (19) can be fastened. The tilt actuator (10) has a tilt drive (20) which extends between the bearing portion (11) and the articulation portion (12) and by means of which the device receptacle (18) can be tilted around a tilt axis (21) arranged parallel to the grabbing plane (5). Figure 1

Description

[0001] The invention relates to an excavator arm for an excavator, wherein the excavator arm has a boom coupling section adapted to a boom and a stick actuator of the excavator such that the excavator arm can be pivotably fixed to the boom by means of the boom coupling section and the stick actuator can be articulated to the excavator arm such that the excavator arm can be displaced within a gripping plane of the excavator by means of the stick actuator, wherein the gripping plane is defined by a boom longitudinal axis and a stick longitudinal axis, and wherein the excavator arm has a bucket actuator articulated to the excavator arm at a distance from the boom coupling section, wherein the excavator arm has a tilt actuator, wherein the tilt actuator has a bearing section and a pivoting section, and wherein the tilt actuator is pivotably fixed to the excavator arm by means of the bearing section.wherein in the linkage section the bucket actuator is at least indirectly linked to the tilt actuator in such a way that the tilt actuator can be displaced within the excavator's grabbing plane by means of the bucket actuator, wherein the tilt actuator has a tool receptacle on which an attachment can be fixed, wherein the tilt actuator has a tilting drive which extends at least sectionally between the bearing section and the linkage section and by means of which the tool receptacle can be tilted about a tilting axis arranged parallel to the grabbing plane.

[0002] In order to adapt excavators as flexibly as possible to different application scenarios, it is common for excavators to have couplings, especially so-called quick-change devices, which are arranged at the end of an excavator arm and by means of which it is possible to attach a wide variety of attachments to the excavator arm, for example different types of buckets, hooks, grabs, demolition chisels or similar.

[0003] To enable the most effective use of the described attachments, it is also common practice to have a tiltrotator positioned between the coupling and the attachment. Tiltrotators allow the attachment to be tilted or rotated. This design of the excavator arm makes it possible to reach even difficult-to-access work areas with the attachment.

[0004] German patent application EP 3 014 026 A1 describes an excavator with a tiltrotator, where the tiltrotator is controlled by a manually operated control element. German patent application DE 20 2013 101 077 U1 describes an excavator with a screw drive for moving a bucket, where the excavator is equipped with a commercially available tiltrotator. German patent application DE 20 2011 100 482 U1 describes a tiltrotator for an excavator in which a tilting drive shaft and a worm shaft of a drive element are arranged parallel to each other and housed in a common, one-piece drive housing, allowing the tilting drive shaft and the worm shaft to be positioned closer together.

[0005] A particular disadvantage of the known systems is that the layered design of the tiltrotator, which is attached to the end of the excavator arm, creates a relatively bulky structure. This limits the usability of known tiltrotators, especially when working in confined spaces such as old buildings, shafts, canals, or similar environments.

[0006] The object of the present invention is therefore considered to be to provide an excavator arm by means of which a tiltrotator can be realized which has a reduced overall height.

[0007] This problem is solved according to the invention by the fact that the device mount has two flat receiving sections formed on opposite sides of the tilt actuator or the rotary actuator, wherein an attachment with a U-shaped coupling section can be fixed to the device mount such that opposing coupling surfaces of the coupling section can be brought into contact with the flat receiving sections. This design of the excavator arm according to the invention makes it possible to integrate the tilt actuator into the excavator arm in a particularly space-saving manner. It is advantageously provided that all actuators can be driven hydraulically, electronically, and / or pneumatically.In such a design of the excavator arm according to the invention, it is advantageously provided that the tilt actuator or the rotary actuator is at least partially enclosed by the attachment.

[0008] To create a particularly robust connection between the individual components of the excavator arm, it is advantageously provided that the bucket actuator can also be articulated to the tilt actuator by means of a rocker arm or a combination of a coupling and a rocker arm. This particularly increases stability against loads acting on the excavator arm perpendicular to the grabbing plane.

[0009] To enable the tilt actuator to be pivotably fixed to the excavator arm, it is advantageously provided that a bearing, for example a ball bearing, a plain bearing, a roller bearing or similar, can be arranged in the bearing section and / or the pivot section. Furthermore, it is also possible for such a bearing to be arranged on the excavator arm, whereby the tilt actuator can be fixed to the bearing by means of suitable fixing devices.

[0010] For the purposes of this invention, "equipment holder" refers to all devices, fixtures, means, and similar items suitable for securing the attachment to the tilt actuator. "Equipment holder" particularly includes devices, fixtures, means, and similar items by which the attachment can be detachably secured to the tiltrotator, including, in particular, so-called quick-change systems.

[0011] An advantageous implementation of the inventive concept provides that the bearing section of the tilt actuator is at least partially enclosed by opposing side elements of the excavator arm. The tilt actuator is thus arranged at least partially within the excavator arm according to the invention.

[0012] In a particularly advantageous implementation of the inventive concept, it is provided that the opposing side elements can have congruent bolt recesses, wherein the tilt actuator can also have a bolt recess in its bearing section which can be brought into alignment with the bolt recesses formed on the side elements, wherein a fastening bolt can be passed through the congruent bolt recesses of the side elements and the tilt actuator, by means of which the tilt actuator can be pivotably fixed to the excavator arm.

[0013] In order to make the bearing bolt bearing less prone to friction, it is advantageously provided that the bolt recess can also be rotatably mounted in the bearing section, for example by means of a rolling bearing.

[0014] An advantageous embodiment of the invention provides that the excavator arm has a rotary actuator, wherein the rotary actuator is fixed to the tilt actuator on an underside of the tilt actuator facing away from the excavator arm, such that the tilt actuator and the rotary actuator together form a tiltrotator which can be tilted about the tilting axis by means of the tilt actuator. The tiltrotator has the attachment receptacle by means of which the attachment can be fixed to the excavator arm, and the attachment fixed to the attachment receptacle can be rotated about a rotational axis perpendicular to the tilting axis by means of the rotary actuator. In such an embodiment of the excavator arm according to the invention, the tilt actuator of the tiltrotator is integrated into the excavator arm, and the rotary actuator is arranged on the tilt actuator.

[0015] The tiltrotator thus formed has a particularly low profile, as it only partially protrudes beyond one end of the excavator arm, primarily with the rotary actuator. It is advantageously provided that the tiltrotator can be designed either modularly or integrally. Modular in this context means that the rotary actuator is detachably attached to the tilt actuator. Integral means that the rotary actuator and the tilt actuator are designed as a single, integrated component, and it is advantageously possible for the rotary actuator and the tilt actuator to be arranged in a common housing.

[0016] In an advantageous embodiment of the excavator arm according to the invention, the rotary actuator is designed as an attachment and is detachably fixed to the mounting of the tilt actuator, wherein the rotary actuator fixed to the tilt actuator has a further mounting. It is particularly provided that the mounting and the further mounting can be identical.

[0017] An advantageous implementation of the inventive concept provides that the excavator arm has a grab, wherein the grab is at least indirectly fixed to the tilt actuator. In this context, "grab" refers to an attachment that has at least one gripping jaw which, relative to a stop surface or another gripping jaw, can be displaced such that an object can be grasped, in particular by being clamped between the gripping jaw and the stop surface, or between the two gripping jaws.

[0018] In this context, "grabber" also refers to grabs for picking up soil, bulk material or similar materials, in particular so-called clamshell grabs.

[0019] An advantageous embodiment of the invention provides that the gripper is fixed to the tilt actuator by means of the rotary actuator. It is provided that the gripper can be arranged both on the rotary actuator designed as an attachment and on the integral rotary actuator of a previously described tiltrotator.

[0020] In an advantageous embodiment of the excavator arm according to the invention, the grapple is designed as an attachment, wherein the grapple is fixed to the mounting point of the tilt actuator, tiltrotator, or rotary actuator. Grapples for excavators are known in a multitude of different designs, optimized for a wide variety of applications, for example, as timber grapples, demolition grapples, sorting grapples, or similar applications.

[0021] This particular design of the excavator arm according to the invention is especially preferred when the attachment is a grapple. Numerous grapples are known that have a U-shaped coupling section and are therefore compatible with the excavator arm according to the invention. Such grapples typically have a low profile, which supports the compact design of the excavator arm according to the invention.

[0022] An advantageous embodiment of the invention provides that the tiltrotator and / or the rotary actuator have at least one linear drive. The linear drive can particularly preferably be designed as a rack and pinion drive with a drive gear or a worm drive with a drive spindle.

[0023] In an advantageous embodiment of the excavator arm according to the invention, the tilt actuator's tilting drive, designed as a linear drive, incorporates a hydraulic cylinder. In this context, a hydraulic cylinder is a component whose length can be changed by altering the pressure of a hydraulic fluid filling a working chamber of the hydraulic cylinder. The hydraulic fluid acts on a piston whose position within the working chamber can be changed. Hydraulic cylinders are frequently used in construction machinery because they can transmit large forces, offer high reliability, and are easily repairable, maintainable, and replaceable. Hydraulic cylinders typically feature quick-release couplings, allowing for easy connection to the hydraulic system of a construction machine.

[0024] An advantageous implementation of the invention provides that the tilt actuator has at least one tilting kinematic mechanism comprising a connecting element, a boom section, and the tilting drive, wherein the tool holder is mounted on the excavator arm at a distance from the tilting axis by means of the connecting element, wherein the connecting element is mounted on the excavator arm with a first connecting section of the connecting element such that it is pivotable about the tilting axis, wherein the tool holder is mounted non-rotatably on a second connecting section of the connecting element, wherein the boom section extends away from the excavator arm from the tilting axis and is non-rotatable relative to the excavator arm, wherein a boom axis of the boom section and the gripping plane always intersect at only one point, and wherein the tilting drive comprises a boom linkage section and a tool holder linkage section.wherein a distance formed between the boom pivot section and the implement mounting section is variable by the tilting drive, wherein the tilting drive is pivotably mounted on the boom section with the boom pivot section and pivotably mounted on the implement mounting with the implement mounting section, such that the implement mounting can be tilted about the tilting axis by means of the tilting kinematics by the tilting drive. It is provided that the tilting drive has working means that act on the boom pivot section and the implement mounting section, such that the boom pivot section and the implement mounting section are mechanically connected to each other by means of the working means of the tilting drive.

[0025] It is envisaged that the working means can be, for example, a piston and a cylinder, wherein the piston is arranged inside the cylinder and wherein a working volume is enclosed by the piston and the cylinder. Preferably, a working medium, such as air, hydraulic oil, or the like, is arranged in the working volume. By changing the working pressure of the working medium in the working volume, the piston can be displaced relative to the cylinder.

[0026] The working device can also be a mechanical linear drive, which may, for example, include a pinion and a rack. Alternatively, the linear drive can also be electromagnetic.

[0027] Advantageously, in the excavator arm according to the invention, a projection of the connecting element, the boom section, the tilting drive, and the section of the attachment mount arranged between the second connecting section and the attachment pivot section onto a projection plane oriented perpendicular to the gripping plane forms a triangle or a quadrilateral. A triangle is formed when the second connecting section and the attachment pivot section are congruent. The design provided according to the invention achieves its mobility by the fact that the length of the tilting drive is variable and that the connecting element in the first connecting section, as well as the tilting drive in the boom pivot section and in the attachment pivot section, are pivotably mounted.

[0028] The excavator arm designed in this way can be particularly compact, since the tilt actuator does not need to be attached to the excavator arm with additional coupling means, but can be integrated directly into it.

[0029] An advantageous implementation of the inventive concept provides that the device mounting linkage section lies in the actuator's central plane, so that the tilting drive of at least one tilting kinematic mechanism does not cross the actuator's central plane. Such a design of the excavator arm according to the invention allows for a particularly robust construction.

[0030] The invention also relates to an excavator arm comprising the tilt actuator, the at least one tilting kinematic mechanism with the connecting element, the boom section, and the tilting drive, wherein the connecting element is mounted on the excavator arm in a rotationally fixed manner with the first connecting section of the connecting element, wherein the attachment receptacle is mounted on the excavator arm in the second connecting section of the connecting element, pivotably mounted about the tilting axis running through the second connecting section and spaced apart from the first connecting section, wherein the boom section extends away from the excavator arm from the tilting axis and is rotationally fixed relative to the attachment receptacle, wherein the boom axis of the boom section and the gripping plane always intersect at only one point, wherein the tilting drive comprises the boom pivot section and the attachment receptacle pivot section.wherein the distance formed between the boom pivot section and the implement mounting section is variable by the tilting drive, wherein the tilting drive is pivotably mounted on the boom section with the boom pivot section and pivotably mounted on the implement mounting with the implement mounting section, so that the implement mounting can be tilted about the tilting axis by means of the tilting kinematics by the tilting drive. Such a design of the excavator arm according to the invention makes it possible to design the excavator arm in a particularly compact manner, especially since the tilt actuator can be integrated directly into the excavator arm and no further coupling means are required to fix the tilt actuator to the excavator arm.

[0031] In this embodiment, too, it is provided that the tilting drive has working means that act on the boom linkage section and the implement mounting section, so that the boom linkage section and the implement mounting section are mechanically connected to each other by means of the working means of the tilting drive.

[0032] The working elements preferably correspond to those already described; for example, they can be a piston and a cylinder, wherein the piston is arranged inside the cylinder and wherein a working volume is enclosed by the piston and the cylinder. A working medium, such as air, hydraulic oil, or similar, is preferably arranged in the working volume. By changing the working pressure of the working medium in the working volume, the piston can be displaced relative to the cylinder.

[0033] It is also envisaged that the working device can be a mechanical linear drive, which may, for example, include a pinion and a rack. Alternatively, the linear drive can also be electromagnetic.

[0034] Advantageously, a projection of the connecting element, the boom section, the tilting drive, and the section of the device holder arranged between the second connecting section and the device holder pivot section onto a projection plane oriented perpendicular to the gripping plane forms a triangle or a quadrilateral. A triangle is formed when the second connecting section and the device holder pivot section are congruent. The construction provided according to the invention achieves its mobility by the fact that the length of the tilting drive is variable and that the connecting element in the second connecting section, as well as the tilting drive in the boom pivot section and in the device holder pivot section, are pivotably mounted.

[0035] In an advantageous implementation of the inventive concept, the boom pivot section is located in the actuator's central plane, so that the tilting drive of at least one tilting kinematic mechanism does not cross the actuator's central plane. Such a design of the excavator arm according to the invention allows for a particularly robust construction.

[0036] An advantageous embodiment of the invention provides that the boom pivot section and the implement mounting section of the at least one tilting kinematic mechanism are arranged in a first or a second volume, wherein the first and second volumes are separated from each other by an actuator center plane, and wherein the actuator center plane is defined by the tilting axis and a central axis of the connecting element, such that the tilting drive of the at least one tilting kinematic mechanism does not intersect or touch the actuator center plane. Such an embodiment of the excavator arm according to the invention makes it possible for the work output of the tilting drive to be transferred to the implement mounting as directly as possible.

[0037] When considering whether the elements described in this application intersect, cross, or similarly intersect each other, and assuming they are three-dimensional objects in reality, the focus here is on whether this applies to the central axes of these objects. The respective bearing points of the objects are assumed to be the starting and ending points of these central axes.

[0038] The same applies to this embodiment of the excavator arm according to the invention: when considering whether the elements described in this application intersect, cross, or similarly intersect each other, and insofar as they are actually three-dimensional objects, the decisive factor here is whether this applies to the central axes of these objects. The respective bearing points of the objects are assumed to be the starting and ending points of these central axes.

[0039] In order to make the excavator arm according to the invention particularly compact, it is provided according to the invention that the boom pivot section of the at least one tilting kinematic mechanism is arranged in the first volume, wherein the implement mounting pivot section of the at least one tilting kinematic mechanism is arranged in the second volume, such that the tilting drive of the at least one tilting kinematic mechanism crosses the actuator center plane. This allows the excavator arm to be advantageously designed to be particularly compact.

[0040] In an advantageous embodiment of the invention, the tilt actuator has at least a first tilting kinematics and a second tilting kinematics, wherein the first tilting kinematics and the second tilting kinematics are spaced apart from each other along the tilting axis.

[0041] It is advantageously provided that by increasing the distance between the boom pivot section and the implement mounting section of the first tilting kinematics by a value X and simultaneously decreasing the distance between the boom pivot section and the implement mounting section of the second tilting kinematics by a value -X, the implement mounting can be tilted by the angle α. Such a design of the excavator arm according to the invention ensures that an undesired tilting of the implement mounting due to a failure of the tilting drives can be prevented.

[0042] To supply energy to the actuators of the excavator arm according to the invention, it is advantageously provided that the tilt actuator and / or the rotary actuator are connected to and / or connectable to an excavator energy system. In this context, "excavator energy system" refers to the excavator's power supply system, which is designed to supply energy to the excavator's attachments. A hydraulic system that provides hydraulic pressure by means of which the attachments can be driven is particularly preferred.

[0043] Further advantageous designs of the excavator arm are explained with reference to exemplary embodiments shown in the drawings. These show: Figure 1 a schematically illustrated side view of an embodiment of the excavator arm according to the invention, Figures 2a schematically illustrated side view of a tilt actuator of an embodiment of the excavator arm according to the invention, Figure 3 a schematically illustrated side view of a tilt actuator of an embodiment of the excavator arm according to the invention with a rotary actuator arranged on the tilt actuator, Figure 4 a schematically represented side view of an integrally designed tiltrotator of an embodiment of the excavator arm according to the invention, Figure 5 the in Figure 3 shown tilt actuator with gripper fixed to the rotary actuator and Figures 6, 7 and 8 Schematic representations of embodiments of the excavator arm according to the invention with tilting kinematics.

[0044] In Figure 1A schematic side view of an embodiment of an excavator arm 1 according to the invention is shown. The excavator arm 1 is intended for use with an excavator (not shown or labeled). The excavator arm 1 has a boom coupling section 2. The excavator arm 1 is pivotably fixed to a boom 3 of the excavator by means of the boom coupling section 2. A boom actuator 4 of the excavator is articulated to the excavator arm 1 such that the excavator arm 1 can be moved within a gripping plane 5 of the excavator by means of the boom actuator 4. The gripping plane 5 is the plane defined by a boom longitudinal axis 6 and a boom longitudinal axis 7.

[0045] The excavator arm 1 shown also has a bucket actuator 8, which is articulated to the excavator arm 1 at a distance from the boom coupling section 2. A tilt actuator 10 is fixed to the excavator arm 1 in an end section 9 opposite the boom coupling section 2. The tilt actuator 10 has a bearing section 11 and a pivot section 12.

[0046] The bearing section 11 of the tilt actuator 10 is arranged between two side elements 13 of the excavator arm 1 and is thus partially enclosed by them. The side elements 13 and the bearing section 11 of the tilt actuator 10 each have corresponding recesses through which a bolt recess 14 is formed, penetrating the side elements 13 and the bearing section 11 of the tilt actuator 10. This bolt recess has a circular cross-section and contains a bearing bolt 15. The tilt actuator 10 is pivotably fixed to the excavator arm 1 by means of the bolt recess 14 and the bearing bolt 15.

[0047] The linkage section 12 of the tilt actuator 10 is operatively connected to the bucket actuator 8 by means of a coupling 16. The coupling 16 and the bucket actuator 8 are pivotally fixed to a rocker arm 17, the rocker arm 17 being pivotally fixed to the excavator arm 1. The rocker arm 17, the coupling 16, the tilt actuator 10, and the excavator arm 1 form a parallelogram linkage. The tilt actuator 10 can be displaced within the excavator's gripping plane 5 by means of the bucket actuator 8, more precisely, pivoted around the pivot pin 15.

[0048] The tilt actuator 10 has a mounting bracket 18 on its underside opposite the excavator arm 1. A tool attachment 19, shown only schematically, is attached to the mounting bracket 18. The tilt actuator 10 also has a tilting drive 20, shown schematically. The tilting drive 20 extends between the bearing section 11 and the pivot section 12. By means of the tilting drive 20, the mounting bracket 18 can be tilted about a tilting axis 21 arranged parallel to the gripping plane 5.

[0049] In Figures 2 is a schematically represented side view of the tilt actuator 10 of the in Figure 1 The excavator arm 1 is shown. The excavator arm 1 and the bucket actuator 8 are only partially shown. No attachment is fixed to the tilt actuator.

[0050] In Figure 3Figure 1 shows a schematic side view of a tilt actuator 10 of an embodiment of the excavator arm 1 according to the invention, on which a rotary actuator 22 is arranged. The rotary actuator 22 is designed as an independent assembly that is detachably fixed to the device mount 18 of the tilt actuator 10. The rotary actuator 22 also has a device mount 18.

[0051] The tilt actuator 10 and the rotary actuator 22 form a tiltrotator 23, which also includes the implement mount 18. An attachment 19 is mounted on the implement mount 18 of the tiltrotator 23. The attachment 19 can be tilted about the tilting axis 21 by means of the tilt actuator 10 of the tiltrotator 23. The attachment 19, which is mounted on the implement mount 18, can be rotated about a rotational axis 24 by means of the rotary actuator 22 of the tiltrotator 23. The rotational axis 24 is arranged perpendicular to the tilting axis 21.

[0052] Unlike the one in Figure 3 The tiltrotator 23 shown is the one in Figure 4 The tiltrotator 23 shown is not modular in design. The tilt actuator 10 and the rotary actuator 22 share a common housing 25 and form an integral component.

[0053] At the in Figure 4 The tiltrotator 23 shown also schematically depicts the tilting drive 20 of the tilt actuator and a rotary drive 26 of the rotary actuator 22. Both drives 20 and 26 each have a hydraulic motor 27 and reaction media 28 operatively connected to the respective hydraulic motor 27. The drives 20 and 26 are designed as linear drives. The hydraulic motors 27 are coupled to an excavator energy system 29, which is shown only schematically.

[0054] In Figure 5Figure 1 shows an embodiment of the excavator arm 1 according to the invention with a modular tiltrotator 23, wherein a gripper 30 is fixed to the device mount 19 of the rotary actuator 22 of the tiltrotator 23. The device mount 19 of the rotary actuator 22 has two flat receiving sections 31. The receiving sections 31 are formed on opposite sides of the rotary actuator 22 of the tiltrotator 23. The gripper 30 has a U-shaped coupling section 32 with opposing coupling surfaces 33. The opposing coupling surfaces 33 of the coupling section 32 are brought into contact with the flat receiving sections 31.

[0055] In Figure 6An embodiment of the excavator arm 1 according to the invention is shown, the tilt actuator 10 of which has a tilting kinematic mechanism 34. The tilting kinematic mechanism 34 comprises a connecting element 35, a boom section 36, and the tilting drive 20. The tilting drive 20 is designed as a hydraulic cylinder.

[0056] The implement holder 18 is mounted on the excavator arm 1 at a distance from the tilting axis 21 by means of the connecting element 35. The connecting element 35 is mounted on the excavator arm 1 by means of a first connecting section 37 of the connecting element 35 such that it can pivot about the tilting axis 21. The implement holder 18 is fixed against rotation at a second connecting section 38 of the connecting element 35. The boom section 36 extends away from the excavator arm 1 from the tilting axis 21 and is fixed against rotation relative to the excavator arm 1. A boom axis 39 of the boom section 36 and the gripping plane 5 intersect at a single point.

[0057] The tilting drive 20 has a boom linkage section 40 and a tool attachment linkage section 41. A distance (not shown and labeled) between the boom linkage section 40 and the tool attachment linkage section 41 can be changed by the tilting drive 20 by displacing the piston 42 within the working volume 43 of the tilting drive 20, which is designed as a hydraulic cylinder. The tilting drive 20 is pivotably mounted on the boom section 36 at the boom linkage section 40 and on the tool attachment 18 at the tool attachment 41, so that the tool attachment 18 can be tilted about the tilting axis 21 by means of the tilting kinematics 34 via the tilting drive 20.

[0058] At the in Figure 6In the excavator arm 1 shown, both the boom linkage section 40 and the implement mounting linkage section 41 of the tilting kinematics 34 are arranged in a first volume 44. The first volume 44 is separated from a second volume 45 by an actuator center plane 46. The actuator center plane 46 is spanned by the tilting axis 21 and a central axis 47 of the connecting element 35. In the Figure 6 The gripping plane 5 and the actuator center plane 46 are congruent. The central axis 47 of the connecting element 35 lies in both the gripping plane 5 and the actuator center plane 46. The tilting drive 20 of the tilting kinematics 34 does not cross the actuator center plane 46.

[0059] In Figure 7Figure 1 shows a schematic representation of the excavator arm 1 according to the invention, the tilt actuator 10 of which has a first tilting kinematic mechanism 34a and a second tilting kinematic mechanism 34b. The tilting kinematic mechanisms 34a and 34b are spaced apart from each other along the tilting axis 21. The tilting drives 20 of the illustrated kinematic mechanisms 34a and 34b are designed as hydraulic cylinders.

[0060] The boom linkage section 40 of the first tilting kinematics 34a is arranged in the first volume 44, while the device mounting linkage section 41 of the first tilting kinematics 34a is arranged in the second volume 45, such that the tilting drive 20 of the first tilting kinematics 34a crosses the actuator center plane 46. The second tilting kinematics 34b is arranged in the reverse order.

[0061] The in Figure 8The schematic representation shown depicts a further embodiment of the excavator arm 1 according to the invention, featuring an alternative arrangement of the tilting kinematics 34a, 34b and the mounting of the connecting element 35 in the connection areas 37, 38. The connecting element 35 is mounted to the excavator arm 1 in a rotationally fixed manner with the first connecting section 37 of the connecting element 35. The tool receptacle 18 is pivotably mounted to the excavator arm 1 in the second connecting section 38 of the connecting element 35 about the tilting axis 21 extending through the second connecting section 38. The tilting axis 21 is spaced apart from the first connecting section 37, and the boom section 36 extends away from the excavator arm 1 from the tilting axis 21. The boom section 36 is rotationally fixed relative to the tool receptacle 18. The boom axis 39 of the boom section 36 and the unlabeled gripping plane always intersect at only one point. REFERENCE MARK LIST

[0062] 1. Excavator arm 2. Boom coupling section 3. Boom 4. Boom actuator 5. Grab plane 6. Boom longitudinal axis 7. Boom longitudinal axis 8. Bucket actuator 9. End section 10. Tilt actuator 11. Bearing section 12. Linkage section 13. Side element 14. Pin recess 15. Bearing pin 16. Coupling 17. Swing arm 18. Attachment mount 19. Attachment 20. Tipping drive 21. Tipping axis 22. Rotary actuator 23. Tiltrotator 24. Rotary axis 25. Housing 26. Rotary drive 27. Hydraulic motor 28. Reaction medium 29. Excavator power system 30. Grab 31. Mounting section 32. Coupling section 33. Coupling surface 34. Tilting kinematics 34a. First tilting kinematics 34b. Second tilting kinematics 35. Connecting element 36. Boom section 37. First connecting section 38. Second connecting section 39. Boom axis 40. Boom linkage section 41. Tool holder linkage section 42. Piston 43. Working volume 44. First volume 45. Second volume 46. Actuator center plane 47. Center axis

Claims

1. Excavator arm (1) for an excavator, wherein the excavator arm (1) has a boom coupling portion (2) adapted to a boom (3) and to an arm actuator (4) of an excavator in such a way that the excavator arm (1) can be pivotably fastened to the boom (3) by means of the excavator coupling portion (2), and the arm actuator (4) can be articulated on the excavator arm (1) in such a way that the excavator arm (1) can be displaced by means of the arm actuator (4) within a grabbing plane (5) of the excavator, wherein the grabbing plane (5) is defined by a boom longitudinal axis (6) and an arm longitudinal axis (7), and wherein the excavator arm (1) has a bucket actuator (8) articulated on the excavator arm (1) at a distance from the boom coupling portion (2), wherein the excavator arm (1) has a tilt actuator (10), wherein the tilt actuator (10) has a bearing portion (11) and an articulation portion (12), wherein the tilt actuator (10) is pivotably fastened to the excavator arm (1) by means of the bearing portion (11), wherein the bucket actuator (8) is articulated, in the articulation portion (12), at least partially on the tilt actuator (10) in such a way that the tilt actuator (10) can be displaced by means of the bucket actuator (8) within the grabbing plane (5), wherein the tilt actuator (10) has a device receptacle (18) to which an attachment device (19) can be fastened, wherein the tilt actuator (10) has a tilt drive (20) that extends at least in portions between the bearing portion (11) and the articulation portion (12) and by means of which the device receptacle (18) can be tilted around a tilt axis (21) arranged parallel to the grabbing plane (5), characterised in that the device receptacle (18) has two flat receiving portions (31) that are formed on opposite sides of the tilt actuator (10) or the rotary actuator (22), wherein an attachment device (19) with a U-shaped coupling portion (32) can be fixed to the device receptacle (18) in such a way that opposing coupling surfaces (33) of the coupling portion (32) can be brought into contact with the flat receiving portions (31).

2. Excavator arm (1) according to claim 1, characterised in that the bearing portion (11) of the tilt actuator (10) is surrounded, at least in portions, by side elements (13) of the excavator arm (1), which lie opposite one another.

3. Excavator arm (1) according to either one of claims 1 or 2, characterised in that the excavator arm (1) has a rotary actuator (22), wherein the rotary actuator (22) is fixed to the tilt actuator (10) on an underside of the tilt actuator (10) facing away from the excavator stick (1), so that a tilt rotator (23) is formed by the tilt actuator (10) and the rotary actuator (22), which can be tilted about the tilting axis (21) by means of the tilt actuator (10), wherein the tilt rotator (23) has the device receptacle (18), by means of which the attachment device (19) can be fixed to the excavator arm (1), wherein the attachment device (19) fixed to the device receptacle (18) can be rotated about an axis of rotation (24), which is arranged perpendicular to the tilt axis (21), by means of the rotary actuator (22).

4. Excavator arm (1) according to claim 3, characterised in that the rotary actuator (22) is designed as an attachment device (19) and releasably fixed to the device receptacle (18) of the tilt actuator (10), wherein the rotary actuator (22) fixed to the tilt actuator (10) has a further device receptacle (18).

5. Excavator arm (1) according to any one of claims 1 to 4, characterised in that the excavator arm (1) has a grabber (30), wherein the grabber (30) is at least indirectly fixed to the tilt actuator (10).

6. Excavator arm (1) according to claim 5, characterised in that the grabber (30) is fixed to the tilt actuator (10) by means of the rotary actuator (22).

7. Excavator arm (1) according to either one of claims 5 or 6, characterised in that the grabber (30) is designed as an attachment device (19), wherein the grabber (30) is fixed to the device receptacle (18) of the tilt actuator (10), the tilt rotator (23) or the rotary actuator (22).

8. Excavator arm (1) according to any one of claims 1 to 7, characterised in that the tilt actuator (10) and / or the rotary actuator (22) have at least one linear drive.

9. Excavator arm (1) according to claim 8, characterised in that the tilt drive (20) of the tilt actuator (10) designed as a linear drive has a hydraulic cylinder.

10. Excavator arm (1) according to either one of claims 8 or 9, characterised in that the tilt actuator (10) has at least one tilt kinematics (34, 34a, 34b) having a connecting element (35), a boom portion (36) and tilt drive (20), wherein the device receptacle (18) is mounted on the excavator arm (1) at a distance from the tilt axis (21) by means of the connecting element (35), wherein the connecting element (35) is mounted on the excavator arm (1) with a first connecting portion (37) of the connecting element (35) such that it can be pivoted about the tilt axis (21), wherein the device receptacle (18) is mounted non-rotatably on a second connecting portion (38) of the connecting element (35), wherein the boom portion (36) extends away from the excavator stick (1), starting from the tilt axis (21), and is non-rotatable in relation to the excavator arm (1), wherein a boom axis (39) of the boom portion (36) and the grabbing plane (5) only ever intersect at one point, wherein the tilt drive (20) has a boom articulation portion (40) and a device receptacle articulation portion (41), wherein a distance formed between the boom articulation portion (40) and the device receptacle articulation portion (41) can be varied by the tilt drive (20), wherein the tilt drive (20) is pivotably mounted with the boom articulation portion (40) on the boom portion (36) and pivotably mounted with the device receptacle articulation portion (41) on the device receptacle (18), such that the device receptacle (18) can be tilted about the tilt axis (21) by means of the tilt kinematics (34, 34a, 34b) by the tilt drive (20).

11. Excavator arm (1) according to claim 10, characterised in that the device receptacle articulation portion (41) lies in the actuator centre plane (46), such that the tilt drive (20) of the at least one tilt kinematics (34, 34a, 34b) does not cross the actuator centre plane (46).

12. Excavator arm (1) according to either one of claims 8 or 9, characterised in that the tilt actuator (10) has the at least one tilt kinematics (34, 34a, 34b) with the connecting element (35), the boom portion (36) and the tilt drive (20), wherein the connecting element (35) with the first connecting portion (37) of the connecting element (35) is mounted non-rotatably on the excavator arm (1), wherein the device receptacle (18) is mounted in the second connecting portion (38) of the connecting element (35), at a distance from the first connecting portion (37), so as to be pivotable on the excavator arm (1) about the tilt axis extending through the second connecting portion (38), wherein the boom portion (36), starting from the tilt axis (21), extends away from the excavator arm (1) and is rotationally fixed in relation to the device receptacle (18), wherein the boom axis (39) of the boom portion (36) and the grabbing plane (5) only ever intersect at one point, wherein the tilt drive (20) has the boom articulation portion (40) and the device receptacle articulation portion (41), wherein the distance formed between the boom articulation portion (40) and the device receptacle portion (41) can be altered by the tilt drive (20), wherein the tilt drive (20) is pivotably mounted on the boom portion (36) with the boom articulation portion (40) and pivotably mounted on the device receptacle (18) with the device receptacle articulation portion (41), such that the device receptacle (18) can be tilted about the tilt axis (21) by means of the tilt kinematics (34, 34a, 34b) by the tilt drive (20).

13. Excavator arm (1) according to claim 12, characterised in that the boom articulation portion (40) lies in the actuator centre plane (46), such that the tilt drive (20) of the at least one tilt kinematics (34, 34a, 34b) does not cross the actuator centre plane (46).

14. Excavator arm (1) according to any one of claims 10 to 13, characterised in that the boom articulation portion (40) and the device receptacle articulation portion (41) of the at least one kinematics (34, 34a, 34b) are arranged in a first spatial volume (44) or a second spatial volume (45), wherein the first spatial volume (44) and the second spatial volume (45) are separated from one another by an actuator centre plane (46), and wherein the actuator centre plane (46) is spanned by the tilt axis (21) and a centre axis (47) of the connecting element (35), such that the tilt drive (20) of the at least one tilt kinematics (34, 34a, 34b) does not cross the actuator centre axis (46).

15. Excavator arm (1) according to any one of claims 10 to 14, characterised in that the boom articulation portion (40) of the at least one tilt kinematics (34, 34a, 34b) is arranged in the first spatial volume (44), wherein the device receptacle articulation portion (41) of the at least one tilt kinematics (34, 34a, 34b) is arranged in the second spatial volume (45), such that the tilt drive (20) of the at least one tilt kinematics (34, 34a, 34b) crosses the actuator centre plane (46).

16. Excavator arm (1) according to any one of claims 10 to 15, characterised in that the tilt actuator (10) has at least a first tilt kinematics (34a) and a second tilt kinematics (34b), wherein the first tilt kinematics (34a) and the second tilt kinematics (34b) are at a distance from one another along the tilt axis (21).

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