LU500452B1 - Swivel device for an attachment of an excavator - Google Patents

Abstract

The invention relates to a pivoting device (1) for an excavator for pivoting an attachment. The pivoting device (1) can be releasably fixed to an excavator boom end of an excavator boom of the excavator. The pivoting device (1) has a pivoting device body (3) that can be fixed to the excavator boom and at least one pivoting actuator (7) designed as a linear drive. The at least one swivel actuator (7) has two components (8, 9) that can be displaced relative to one another along a longitudinal axis (11) of the swivel actuator (7). The pivoting device (1) has an attachment receptacle (4) arranged on the pivoting device body (3) so that it can pivot about a pivot axis (5). The swivel device (1) has at least one swivel actuator mount (8) fixed to the swivel device body (3). The swivel actuator (7) is articulated with a first component (10) on the at least one swivel actuator mount (8) and is articulated with a second component (9) on the attachment mount (4). The attachment mount (4) can be pivoted about the pivot axis (5) by means of the pivot actuator (7). The second component (9) is arranged displaceably at least in sections within a volume surrounded at least in sections by the first component (10).

Description

- 1 = JAN 2599 P LU LU500452

Thomas Jansen Swivel device for an attachment of an excavator

The invention relates to a pivoting device for an excavator for pivoting an attachment device, the pivoting device on an excavator handle end of a

excavator boom of the excavator, the pivoting device having a pivoting device body that can be fastened to the excavator boom and at least one pivoting actuator designed as a linear drive, the at least one pivoting actuator having two along one

longitudinal axis of the swivel actuator has components that can be displaced relative to one another, the swivel device having an attachment receptacle arranged on the swivel device body so that it can swivel about a swivel axis, the swivel device having at least one on the

Pivoting device body has fixed pivoting actuator mount, wherein the pivoting actuator is articulated with a first component on the at least one pivoting actuator mount and is articulated with a second component on the attachment mount, so that the attachment mount can be pivoted about the pivot axis by means of the pivot actuator.

In order to be able to adapt excavators as flexibly and versatilely as possible to different application scenarios, excavators usually have couplings, in particular so-called quick-change devices, which are arranged at the end of an excavator arm.

By means of these couplings

- 2 = JAN 2599 P LU LU500452 different attachments, such as buckets, hooks, grabs, demolition tools or similar tools used on the construction site can be arranged on the excavator arm.

In order to be able to work as effectively as possible with the attachments described, it is also customary for a swivel/rotation device, a so-called tiltrotator, to be arranged between the coupling and the attachment. A tiltrotator is formed by a pivoting device and a rotating device. This allows the attachment to be tilted and rotated. Such a configuration of the excavator arm makes it possible for the attachment device to reach work areas that are difficult to access and for particularly precise processing to take place within the work area. Hydraulic drives, such as hydraulic cylinders, are usually used as drive types for tiltrotators. By actuating and extending the hydraulic cylinder, a tilting of the attachment attached to the tiltrotator is caused. The rotary movement of the tiltrotator is usually carried out by means of hydraulically driven rotary drives. A particular disadvantage of the known systems is that the hydraulic drives or the hydraulic cylinders are arranged in such a way that they protrude beyond the tiltrotator. Thus, the tiltrotator has a large space requirement. The known tiltrotators can only be used to a limited extent, particularly when working in narrow work areas, for example in old buildings, in shafts, in canals or the like. In addition, there is a risk of hydraulic cylinders protruding from the tiltrotator

- 3 - JAN 2599 P LU LU500452 colliding with objects from the work area during the work movement.

It is therefore considered the object of the present invention to provide a pivoting device for operation on an excavator boom of an excavator which has a particularly low structural height.

This invention is achieved according to the invention in that the second component is arranged displaceably at least in sections within a volume surrounded at least in sections by the first component.

Linear drives are available in different designs and sizes, so that a suitable linear drive can be selected depending on the work task.

Linear drives can be driven hydraulically, electrically and/or pneumatically, for example.

The linear drive can be designed, for example, as an electrically driven ball screw drive or as an electrically operated rack and pinion drive.

The second component is designed as a driven and moving threaded spindle or as a moving toothed rack, which is articulated on the attachment mount.

The first component is formed by a drive housing of the linear drive, which is articulated to the pivoting device body.

Ball screw drives and rack and pinion drives can be used to carry out fast and particularly precise displacement movements.

However, the spindle turns of the threaded spindles and tooth flanks of the racks have a low impact load limit and are also sensitive to dirt.

Protecting such linear drives against such environmental influences is only possible with great effort.

Therefore

- 4 - JAN 2599 P LU LU500452 the area of application of such linear drives on construction sites is rather limited.

In an advantageous embodiment of the pivoting device according to the invention, it is provided that the linear drive has a hydraulic cylinder.

The first component is designed as a cylinder housing and the second component as a piston rod.

The cylinder housing has a cylinder head through which the piston rod is passed to the outside, a cylinder tube and a cylinder bottom.

Hydraulic cylinders are often used in the field of work machines used on construction sites, since they can transmit large forces, have a high level of reliability, are easy to repair, repair and replace.

Hydraulic cylinders usually have quick-release couplings, by means of which they can be easily connected to a hydraulic system of a working machine.

In an advantageous implementation of the idea of the invention, it is provided that the first component of the swivel actuator is mounted on the swivel actuator mount in such a way that the swivel actuator can be rotated about a compensating shaft oriented parallel to the swivel axis and spaced apart from the swivel axis.

Due to the fact that the pivot axis and the compensating element are arranged at a distance from one another, the volume of installation space enclosed by the pivot actuator mount, the pivot device body and the attachment receptacle can advantageously be configured to be large.

A particularly large cylinder housing of the hydraulic cylinder can thus be arranged in the volume of installation space.

As a result, in the pivoting device according to the invention, a hydraulic cylinder

- 5 - JAN 2599 P LU LU500452 of a particularly large size, so that the pivoting device can be operated with particularly large pivoting forces generated by the pivoting actuator.

Thus, particularly large loads with the

Swivel device to be moved.

In an advantageous embodiment of the pivoting device according to the invention it is provided that the first component on an outside of the first component on the

Pivoting actuator mount is articulated and the second component is articulated at one end facing the attachment mount on the attachment mount.

In this case, the second component is articulated on an upper side of the attachment mount facing the pivoting device.

Since the second component is designed as a piston rod when the swivel actuator is designed as a hydraulic cylinder and can be displaced within the volume enclosed by the first component, here the cylinder housing, the second component can be designed to be particularly small.

In particular, an outside diameter of the piston rod can be chosen to be smaller than an outside diameter of the cylinder housing.

Thus, the end of the second component and thus also the pivot point can be articulated at a particularly small distance from the upper side of the attachment mount, so that the pivoting device can be configured with a particularly low installation height.

Advantageously, the first component is seen in the longitudinal axis of the swivel actuator in the middle of the

Pivot actuator mount pivotally hinged.

For this purpose, the swivel actuator mount can be designed in the form of a fork, so that the first component of the swivel actuator,

- 6 = JAN 2599 P LU LU500452 embodied as a hydraulic housing, for example, locatable within the volume enclosed by the forked pivot actuator mount. The pivoting actuator can thus be arranged on the pivoting actuator holder in a particularly space-saving manner, so that a pivoting device can be designed with a low installation height. Advantageously, the invention provides that the pivot actuator is disposed entirely between the pivot body and the attachment receptacle, such that the pivot actuator is located within a volume enclosed by the pivot body and the attachment receptacle. The swivel actuator is thus particularly well protected against possible collisions with objects located in the work area. For the pivotable connection of the attachment mount to the pivoting device body, the invention provides that the pivoting device body has a connecting shaft arranged along the pivot axis, the attachment mount being pivotably fixed to the connecting shaft and the connecting shaft being non-rotatably connected to the pivoting device body. By using the connecting shaft, the common pivoting axis of the pivoting device body and the attachment mount is predetermined, so that a particularly good power transmission of the pivoting device can be carried out.

In order to be able to transmit the compressive force generated by the swivel actuator to the swivel device body, in one

- 7 = JAN 2599 P LU LU500452 advantageous embodiment of the invention that the swivel actuator holder is fixed in a rotationally fixed manner with the connecting shaft. The swivel actuator mount can be fixed in a rotationally fixed manner on the swivel device body, for example, by pressing the swivel actuator mount onto the connecting shaft. Alternatively, it can be easily fixed by means of a joint connection, such as a welded connection.

In order to be able to design the pivoting device to be particularly space-saving, an advantageous implementation of the pivoting device according to the invention provides that the end of the excavator boom is designed in the form of a fork, so that the pivoting device is surrounded at least in sections by two opposite side elements of the end of the excavator boom. In addition, the swivel actuator can be aligned in such a way that it is arranged completely within a volume spanned by the side elements. A collision of the swivel actuator with objects or attachments during operation of the excavator boom can thus be avoided.

In order to be able to use the attachments connected to the excavator boom particularly flexibly, an advantageous implementation of the idea of the invention provides that the pivoting device has a rotation device, with the rotation device being fixed on an underside of the pivoting device facing away from the excavator boom, so that the pivoting device and the rotation device a swivel-rotation device is formed, which can be tilted about the tilting axis by means of the swivel device, the swivel

- 8 = JAN 2599 P LU LU500452 Rotating device having the attachment mount, by means of which the attachment can be fixed to the excavator boom, wherein the attachment fixed to the attachment mount can be rotated about an axis of rotation by means of a rotary actuator, which is arranged perpendicular to the tilting axis.

The pivoting device can be designed in such a way that it is fixed to the excavator boom by means of a coupling of a quick-change device.

The attachment mount is arranged on an underside of the rotating device that faces away from the pivoting device.

Thus, the swivel-rotation device can be manufactured with a low structural height.

In an advantageous embodiment of the pivoting device according to the invention, it is provided that the rotary actuator is designed as a hydraulically driven worm drive.

This has a hydraulic motor and a worm gear.

The worm gear has a worm shaft with a helical thread and a worm wheel configured as a gear.

A worm gear allows endless rotation of the worm wheel or of the component fixed to the worm wheel, such as the attachment mount.

Worm drives can be designed to be small, so that the pivoting/rotating device can be designed to be particularly space-saving and to have a low installation height.

In an advantageous embodiment of the invention, it is provided that the rotation device is designed as an attachment and is releasably fixed to the attachment receptacle of the pivoting device, the rotation device fixed to the pivoting device having a

- 9 = JAN 2599 P LU LU500452 has additional attachment mounts. In particular, it is optionally provided according to the invention that the attachment receptacle and the additional attachment receptacle are of identical design. Thus, the attachment can be arranged optionally and depending on the application on the attachment mount of the pivoting device or on the other attachment mount of the rotating device.

In order to be able to provide a particularly space-saving pivoting/rotating device, an advantageous embodiment of the idea of the invention provides that the attachment receptacle has two flat receptacle sections which are formed on opposite sides of the pivoting device or the pivoting/rotating device, with an attachment having an attachment on the attachment receptacle can be fixed in a U-shaped coupling section in such a way that mutually opposite coupling surfaces of the coupling section can be brought into contact with the flat receiving sections. In such an embodiment of the pivoting device according to the invention, it is advantageously provided that the pivoting device or the rotating device is surrounded at least in sections by the attachment.

The pivoting-rotation device described has a particularly low structural height, since it protrudes only partially and for the most part with the rotation device beyond one end of the excavator boom. It is advantageously provided according to the invention that the pivoting/rotating device can be of modular as well as integral design. In this case, modular means that the

- 10 - JAN 2599 P LU LU500452 rotation device is detachably fixed to the pivoting device. Integral means that the rotation device and the pivoting device are designed as a coherent assembly, wherein it can advantageously be provided that the rotation device and the pivoting device are arranged in a common housing. In order to be able to supply the pivoting device and/or the rotation device with hydraulic, electrical or pneumatic energy particularly easily, an advantageous embodiment of the pivoting device according to the invention provides that the pivoting device and/or the rotation device can be connected to an excavator energy system. In addition, the supply lines can be laid particularly easily along the excavator handle. In addition, flexible hoses can be used for conducting hydraulic fluids in order to compensate for changes in distance between two moving components due to relative movements. In addition, so-called rotary feedthroughs are available for a rotary movement, by means of which hydraulic fluids or electrical energy can be transmitted.

Further advantageous configurations of the invention are explained on the basis of exemplary embodiments illustrated in the drawings. The figures show: FIG. 1 a schematic representation of the pivoting device according to the invention in a perspective view,

- 11 - JAN 2599 P LU LU500452 Figure 2 shows a schematic representation of the pivoting device according to the invention in a sectional view along the section line A-A shown in Figure 1 and Figure 3 shows a schematic representation of the pivoting device according to the invention with a rotation device attached thereto.

FIG. 1 shows a schematic representation of the pivoting device 1 according to the invention for an excavator for pivoting an attachment.

The pivoting device 1 can be releasably fixed to an excavator boom end of an excavator boom, not shown in FIG.

An attachment receptacle 4 is arranged on the swivel device body 3 so that it can swivel about a swivel axis 5 .

The pivoting device 1 has two pivoting actuators 7 configured as hydraulic cylinders 6, with a second component 9 of the pivoting actuator 7 being arranged at least in sections within a volume surrounded at least in sections by a first component 10 of the pivoting actuator 7 in a longitudinal direction 11 of the pivoting actuator 7.

The swivel device 1 has a plurality of swivel actuator mounts 8, with the swivel actuators 7 being articulated with the first component 10 on the swivel actuator mount 8 and with the second component 9 being articulated on the attachment mount 4, so that the attachment mount 4 can be rotated about the pivot axis 5 by means of the pivot actuator 7 is pivotable.

The pivot device body 3 has a connecting shaft 12 arranged along the pivot axis 5, on which the attachment receptacle 4 is pivotally fixed.

The

- 12 = JAN 2599 P LU LU500452 Swivel actuator mount 8 is fixed to the connecting shaft 12 in a rotationally fixed manner. The first component 10 is designed as a cylinder housing 14 and the second component 9 is designed as a piston rod 13 . The piston rod 13 is articulated on the attachment mount 4 . For this purpose, in the area of the end face of the piston rod 13, at the end of the piston rod 13 facing away from the cylinder housing 14, a receiving bore is made in the piston rod 13, through which a receiving bolt 15 can be inserted, by means of which a detachable connection between the piston rod 13 and the attachment receptacle 4 is made. The first component 10 embodied as a cylinder housing 14 is articulated on the swivel actuator mount 8 , the swivel actuator mount 8 being fixed in a rotationally fixed manner on the connecting shaft 12 . By activating and extending the piston rod 13 of the hydraulic cylinder 6 , the attachment mount 4 can be pivoted about the pivot axis 5 .

FIG. 2 shows a schematic representation of the pivoting device 1 according to the invention in a sectional view along the section line A-A shown in FIG. The swivel actuator 7 is articulated with the first component 10 embodied as a piston rod 13 on the swivel actuator mount 8 and with the second component 9 embodied as a cylinder housing 14 on the attachment mount 4 . The attachment mount 4 is fixed pivotably on the connecting shaft 12 . The swivel actuator mount 8 is fixed in a rotationally fixed manner on the connecting shaft 12 . The hydraulic cylinder 6 is completely within the through the

- 13 - JAN 2599 P LU LU500452

Swivel body 3 and the volume enclosed by the attachment receptacle 4 are arranged.

FIG. 3 shows a schematic representation of the pivoting device 1 according to the invention with a rotation device 16 attached thereto.

The rotation device 16 is fixed on an underside of the swivel device 1 facing away from the excavator boom and can be rotated about the swivel axis 5 .

The

Attachment receptacle 4 is arranged on an underside of the rotating device 16 facing away from the pivoting device 1 .

The attachment mount 4 , which is arranged perpendicular to the pivot axis S, can be rotated about an axis of rotation 19 by means of a rotary actuator 18 designed as a worm drive 17 .

In the representations of FIGS. 1 to 3, only a number of elements of the same type are identified by a reference number as an example.

- 14 - JAN 2599 P LU LU500452 REFERENCE MARKENTLTI® STE

1. Swivel device

2. Quick change device

3. Swivel body

4. Attachment pickup

5. Pan axis

6. Hydraulic cylinder

7. Pan actuator

8. Pan Actuator Bracket

9. Second component

10. First component

11. Longitudinal axis

12. Connection shaft

13. Piston rod

14. Cylinder body

15. Locating Pin

16. Rotating device

17. Worm drive

18. Rotary Actuator

19. Axis of rotation

Claims (12)

- 15 - JAN 2599 P LU LU500452 PATENT CLAIMS 1. Swivel device (1) for an excavator for swiveling an attachment, wherein the swivel device (1) can be releasably fixed to an excavator boom end of an excavator boom of the excavator, the swivel device (1) having a swivel device body (3) that can be fixed to the excavator boom and at least one as linear drive configured pivot actuator (7), wherein the at least one pivot actuator (7) has two along a longitudinal axis (11) of the pivot actuator (7) movable relative to each other components (8,9), wherein the pivot device (1) has a pivot axis ( 5) has attachment receptacles (4) pivotably arranged on the pivoting device body (3), the pivoting device (1) having at least one pivoting actuator mount (8) fixed to the pivoting device body (3), the pivoting actuator (7) having a first component (10) is articulated to the at least one swivel actuator mount (8) and having a second component (9) is articulated on the attachment mount (4), so that the attachment mount (4) can be pivoted about the pivot axis (5) by means of the pivot actuator (7), characterized in that the second component (9) is at least partially within one of the first component ( 10) is arranged displaceably at least in sections surrounded volume. - 16 - JAN 2599 P LU LU500452 2. Pivoting device (1) according to claim 1, characterized in that the linear drive has a hydraulic cylinder (6). 3. Pivoting device (1) according to claim 1 or 2, characterized in that the first component (10) of the pivoting actuator (7) is mounted on the pivoting actuator mount (8) in such a way that the pivoting actuator (7) rotates about a direction parallel to the pivoting axis ( 5) oriented and to the pivot axis (5) spaced compensating thing is rotatable around. 4. Pivoting device (1) according to one of the preceding claims, characterized in that the first component (10) is articulated on an outer side of the first component (10) on the pivot actuator mount (8) and the second component (9) on one of the attachment mounts (4) end facing the attachment mount (4) is articulated. 5. Pivoting device (1) according to one of the preceding claims, characterized in that the pivoting device body (3) has a connecting shaft arranged along the pivot axis (5), the attachment mount (4) being pivotably fixed to the connecting shaft (12). 6. Pivoting device (1) according to claim 5, characterized in that the pivoting actuator holder (8) is non-rotatably fixed to the connecting shaft (12). - 17 - JAN 2599 P LU LU500452 7. Swivel device (1) according to one of the preceding claims, characterized in that the end of the excavator boom is designed in the form of a fork, so that the swivel device (1) is surrounded at least in sections by two opposite side elements of the end of the excavator boom. 8. Pivoting device (1) according to one of the preceding claims, characterized in that the pivoting device (1) has a rotation device (16), the rotation device (16) being fixed on an underside of the pivoting device (1) facing away from the excavator boom, so that the pivoting device (1) and the rotation device (16) form a pivoting-rotation device which can be tilted about the pivot axis (5) by means of the pivoting device (1), the pivoting-rotation device having the attachment mount (4) by means of which the Attachment can be fixed to the excavator boom, the attachment fixed to the attachment mount (4) being rotatable by means of a rotary actuator about an axis of rotation (19) which is arranged perpendicularly to the tilting axis. 9. Pivoting device (1) according to claim 8, characterized in that the rotary actuator (18) is designed as a hydraulically driven worm drive (17). 10. Pivoting device (1) according to claim 8 or 9, characterized in that the rotation device (16) is designed as an attachment and is detachably fixed to the attachment receptacle (4) of the pivoting device (1). - 18 - JAN 2599 P LU LU500452, the rotation device (16) fixed to the attachment mount (4) having a further attachment mount (4). 11. Pivoting device (1) according to one of Claims 8 to 10, characterized in that the attachment mount (4) has two flat receiving sections which are formed on opposite sides of the pivoting device (1) or the swivel-rotation device, with the attachment mount (4) An attachment with a U-shaped coupling section can be fixed in such a way that mutually opposite coupling surfaces of the coupling section can be brought into abutment with the flat receiving sections. 12. Pivoting device (1) according to one of claims 8 to 11, characterized in that the pivoting device (1) and/or the rotation device (16) can be connected to an excavator energy system.