Excavator Dipper

Abstract

The present invention relates to a dipper (14) for an excavator. The dipper (14) comprises a dipper section (51) mounted on a dipper end (48) provided on a dipper main section (50). The dipper (14) comprises a mounting shaft (17) mounted on the dipper end (48) of the dipper section (51), with a mounting device (21) pivotally mounted about the mounting shaft (17) using a mounting bearing point (38) in a connecting unit (33). The dipper (14) comprises a deflector fulcrum (29) disposed adjacent to the mounting shaft (17) at the dipper end (48). The dipper (14) comprises a pivot mechanism system (27) having a pivot fulcrum (35) to which a deflector (28) and a connecting section (31) are both mounted. The deflector 28 engages a deflector fulcrum 29 at its opposite end from the pivot fulcrum 35. The coupling 31 engages at its opposite end with a coupling bearing point 37 of the coupling unit 33. A fork-type link 20 is provided between the dipper 14 and the mounting device and / or between the pivot mechanism system 27 and the mounting device 21.

Description

[Technical Field]

[0001] The present invention relates to an excavator stick, in which a mounting device with a coupling device can be arranged to pivot about a mounting axis. [Background technology]

[0002] German Utility Model No. 202011100482 discloses an excavator that pivotally accommodates a mounting device at the free end of a stick. The mounting device is pivotally connected to a connecting device on the mounting device around the mounting axis of the stick. A swivel drive is provided on the connecting device, which also has a connecting portion on the opposite side of the connecting device for holding a work tool. A pressure cylinder is provided on the upper side of the stick and controls the pivoting movement of the mounting device around the mounting axis of the stick. The piston rod of the pressure cylinder engages with a pivot mechanism. The pivot mechanism includes a connecting portion and a deflector, which are pivotally arranged on a common axis to which the pressure cylinder engages. The deflector engages with the deflector axis of the stick at its opposite end, and the connecting portion engages with the connecting device at its opposite end. The upper and lower sides of the stick are tapered toward the mounting axis. This stick design, with the attachment connection to the mounting axis located at the end of the stick, allows for a wide range of applications. However, there are applications where pivotal movement of the attachment relative to the stick is not sufficient. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] German Utility Model No. 202011100482 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention is based on the problem of creating an excavator stick for reducing the separation forces on the stick from the attachment. [Means for solving the problem]

[0005] This problem is solved by an excavator stick in which a fork-shaped connection is provided between the stick and the attachment device and / or between the swivel mechanism and the attachment device. This fork-shaped connection allows the attachment device to be positioned closer to the attachment axis on the stick. Additionally, this fork-shaped connection allows the attachment device to be positioned closer to the base machine. As a result, the distance between the attachment and the stick can be reduced. This allows the acting lever arm to be reduced, resulting in a reduction in the separation force. This also allows for improved handling of the work tool around the attachment axis at the stick end of the stick and an increased range of rotation of the work tool.

[0006] Preferably, the distance of the attachment bearing point of the connecting device to the end face or flat of the attachment device and / or the distance of the connection bearing point of the connecting device to the cover face of the attachment device is provided to be 2.5 times or less the bolt diameter at the attachment bearing point and / or the connection bearing point of the connecting device. This has the advantage that the lever arm acting between the working tool and the stick is reduced, which can also reduce the separation force and at the same time improve the handling force.

[0007] According to a first embodiment, preferably the fork-shaped connection between the stick and the attachment device is formed by a fork-shaped stick part towards the stick end, which is provided with two fork arms arranged at a distance from each other. This design of the fork-shaped stick part allows a part of the attachment device to be located between the two fork arms and connected to the stick end.

[0008] Preferably, the mounting axis and the deflector axis are provided on the fork arms of the fork-like stick portion, which allows a compact and short arrangement for accommodating the mounting device and / or the pivoting mechanism.

[0009] The forked stick portion can be designed as a straight stick portion. Straight stick portion is understood to mean the connection of the stick portion to the main stick portion, in which the top and / or bottom of this stick portion and the main stick portion lie in a common plane. Alternatively, the forked stick portion can be provided cranked relative to the main stick portion. If the stick portion is offset relative to the main stick portion, the cranked stick portion is directed upwards at an angle relative to the main stick portion.

[0010] In embodiments involving forked stick portions, the deflectors are preferably located inside each fork arm and attached to the deflector shafts of the fork arms. The linkage is preferably rod-shaped and preferably engages between two side plates of the linkage device, thereby further increasing the pivot range towards the top of the stick.

[0011] According to an alternative embodiment, the fork-shaped connection between the pivoting mechanism and the attachment device comprises a fork-shaped connection with two connecting arms, whereby the connecting arms are articulatedly connected to the connecting device. Preferably, a connecting stick can be formed on the opposite side of the connecting arms.

[0012] Preferably, the swivel mechanism with the fork-shaped connection can be provided on the forkless stick part, which is aligned with the stick end. A forkless stick part can be understood to mean that the stick part and the main stick part form a unit, for example with the side plates and / or the upper and / or lower sides, which are located on one surface. This embodiment with the forkless stick end and the fork-shaped connection on the swivel mechanism also has the advantage that the attachment device can be shortened at the connection to the stick. This can also enable an extended swivel angle.

[0013] Preferably, the fork-shaped connectors on the pivot mechanism engage with the respective connector arms on the outside of the side plates of the connecting device, although alternatively the connector arms may be aligned on the inside of the side plates.

[0014] In the design of the stick end without the fork, preferably the deflectors engage with the deflector shafts of the stick part on each outer side of the stick part, whereby the deflectors are preferably mounted opposite the pivot shafts on each outer side of the connection part, which can provide improved pivoting movement of the pivoting mechanism.

[0015] The forkless stick part, preferably provided with a swivel mechanism with a fork-shaped connection, can be straight relative to the main stick part. The upper and / or lower sides of the stick parts and the main stick part can lie in one plane. Alternatively, the forkless stick part can be cranked relative to the main stick part. In the case of a cranked stick part, it can be angled at an angle of less than 180° relative to the upper side of the main stick part. Regarding straight and cranked designs, reference can be made to the explanations above.

[0016] Furthermore, preferably, the coupling device of the mounting device is pivotally connected to a mounting pin on the mounting shaft of the stick portion, and the coupling pin is provided on the coupling device and is provided for engagement with the coupling part of the swivel mechanism. The swivel mechanism has a deflector that engages with the deflector shaft of the stick, and the swivel mechanism is pivotally actuated by a pressure cylinder. The coupling part and the deflector of the swivel mechanism are aligned with each other so that the coupling pin of the coupling device can be positioned adjacent to the deflector shaft of the stick when the mounting is swiveled to the top of the stick. By connecting the mounting to the cranked stick, an extended swivel range can be achieved.

[0017] Furthermore, the mounting bolts and connecting bolts of the connecting device are preferably offset in height relative to one another, and preferably the mounting bearing points are offset towards the rotation device of the mounting device, so that the connecting bolts can be located above the rotation device and the mounting bearing points can be offset, i.e. recessed, towards the rotation drive.

[0018] Furthermore, the mounting bearing points and connecting bolts of the connecting device are preferably arranged at an angle relative to the mounting device formed by two imaginary straight lines, where one or more imaginary straight lines extend through the mounting bearing points and the connecting pin, and the second or other imaginary straight line extends offset in the plane of rotation of the rotation device of the mounting device or parallel to the plane of rotation. The offset arrangement of the connecting bolts and mounting bearing points of the connecting device allows the mounting bearing points of the connecting device to be offset in the direction of the plane of rotation of the rotation device of the mounting device, thereby reducing the installation height of the mounting device relative to the stick. In particular, this increases the pivot angle range relative to the underside of the stick.

[0019] Advantageously, the imaginary straight line of the attachment device is provided at an angle β of between 15 and 45°, preferably between 25 and 35°, which in turn enables an advantageous connection of the attachment device to the cranked stick portion of the stick.

[0020] Advantageously, the cranked stick portion is arranged to lie at an angle α between two straight lines: a first or one imaginary straight line extends through the mounting axis and the deflector axis, and a second or other imaginary straight line extends through the deflector axis of the stick and the stick connection axis; or one imaginary straight line extends through the mounting axis and the deflector axis, and a second or other imaginary straight line extends through the deflector axis of the stick and the stick mounting axis. This area at the stick end is sufficient to form the cranked stick portion so as to increase the pivot angle range of the mounting device.

[0021] Preferably, the cranked stick portion is bent towards the top of the stick at an angle α of 15 to 45°, preferably 25 to 35°, this range being found to be advantageous for use and connection of the attachment device.

[0022] Preferably, the angular range of the imaginary straight line of the mounting device and the imaginary straight line of the cranked stick are the same, which allows for a maximum pivoting range or maximum opening angle, which may be 200°, within which the mounting device can be pivoted relative to the cranked stick.

[0023] Preferably, the height between the connecting bolt and the mounting bearing point in one connecting device is equal to the height between the mounting axis of the cranked stick portion and the deflector axis in the other stick.

[0024] The deflector axis of the pivoting mechanism is preferably located in the transition area between the main stick part and the cranked stick part. Alternatively, the deflector axis can be located on the cranked stick part, i.e., outside the transition area between the main stick part and the cranked stick part. Alternatively, the deflector axis can be located on the stick.

[0025] Furthermore, the length of the stick portion is preferably provided to be less than 20% of the total length of the stick. Preferably, the length of the cranked stick portion extends from the deflector axis to the free end of the cranked stick portion. The cranked short stick portion may be sufficient to improve pivotal mobility.

[0026] The invention as well as other advantageous and alternative embodiments thereof are described and explained in more detail below with reference to examples shown in the drawings. The features from the description and drawings can be used individually or in any combination according to the invention. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a schematic side view of an excavator with a stick, an attachment device, and a work tool; [Figure 2] 1 is a schematic side view of an excavator stick with a cranked stick portion. FIG. [Figure 3] FIG. 3 is a perspective view of the stick shown in FIG. 2. [Figure 4] FIG. 3 is a perspective view of an attachment device for connecting to the stick shown in FIG. 2. [Figure 5] FIG. 5 is a schematic side view of the attachment device shown in FIG. 4. [Figure 6] 4A is a schematic cross-sectional view of the attachment device taken along line IV-IV in FIG. 4. [Figure 7] 5 is a perspective view of the stick according to FIG. 2 with the attachment device according to FIG. 4 in the working position. [Figure 8] 5 is a schematic side view of the stick according to FIG. 3 with the attachment device according to FIG. 4 in a first working position. [Figure 9] FIG. 7 is a schematic side view of the arrangement according to FIG. 6 in another working position. [Figure 10] FIG. 4 is a perspective view of an alternative embodiment of the stick of FIG. 3. [Figure 11] 10 is a perspective view of the stick according to FIG. 9 with the attachment device according to FIG. 4 in the working position. [Figure 12] FIG. 4 is a perspective view of an alternative embodiment of the stick of FIG. 3. [Figure 13] 12 is a perspective view of the stick according to FIG. 11 with the attachment device according to FIG. 4 in the working position. [Figure 14] FIG. 12 is a perspective view of an alternative embodiment of the stick of FIG. 11. [Figure 15] 14 is a perspective view of the stick according to FIG. 13 with the attachment device according to FIG. 4 in the working position. DETAILED DESCRIPTION OF THE INVENTION

[0028] FIG. 1 shows a schematic side view of an excavator 11. The excavator 11 comprises a basic machine 13 with a boom 12, which is hinged at its end with a stick 14. The boom 12 is moved up and down by a lifting cylinder 19. The boom 12 comprises at least one stick cylinder 18 for actuating the pivotal movement of the stick 14. A pressure cylinder 16 is provided on the stick 14 and is capable of actuating at least one attachment device 21 provided on the stick 14. The attachment device 21 is pivotally attached to the end of the stick 14 at an attachment axis 17. This attachment device 21 may comprise a rotation device 22 with a rotation drive 24 and a coupling part 23, which may in particular be a quick-change coupling. The rotation device 22 comprises a drive housing 66. The rotation drive 24 enables the coupling part to rotate along the rotation axis 26 relative to the drive housing 66. A work tool 25 is exchangeably attached to the coupling part 23. A pivoting mechanism 27 is provided for controlling the pivoting movement of the mounting device 21. It comprises a deflector 28, which is articulated at one end to the stick 14 at a deflector axis 29. The pivoting mechanism 27 further comprises a linkage 31, which is connected at one end to the deflector 28 via a common pivot axis 35. At the opposite end, the linkage 31 engages with a coupling device 33, which is a component of the mounting device 21 or is attached to the mounting device 21. Preferably, the drive housing 66 has an at least partially extending cover surface 67, on which the coupling device 33 is provided, and the pressure cylinder 16, in particular the piston rod of the pressure cylinder 16, engages with the pivot axis 35 of the pivoting mechanism 27.

[0029] 2 shows a schematic enlarged side view of the stick 14. FIG. 3 shows a perspective view of the stick 14 shown in FIG.

[0030] The stick 14 has a main stick portion 50. One end of the main stick portion 50 is a stick bearing point 41, through which the stick 14 is articulated relative to the boom stick 12. Adjacent to this is a stick cylinder axis 42, on which the stick cylinder 18 of the boom stick 12 engages. A lower side 43, designated as a lower chord, extends from the stick bearing point 41 to a front end 48 of the stick. On the opposite side, the stick 14 has an upper side 45, designated as an upper chord. A pressure cylinder bearing 46 for holding the pressure cylinder 16 is provided on the upper side 45. The upper side 45 and the lower side 43 are aligned at an acute angle to each other in the direction of the deflector axis 29.

[0031] The stick 14 has a cranked stick portion 51. This cranked stick portion 51 is provided at the stick end 48. The stick 14 comprises a main stick portion 50 with the stick bearing points 41 and 42, and the cranked stick portion 51. The mounting axis 17 is provided at the cranked stick portion 51. The cranked stick portion 51 extends from the deflector axis 29 toward the upper side 45 of the stick 14. The cranked stick portion 51 is cranked upward relative to the lower side 43 of the stick 14 at an angle α of, for example, 30°. The angle for the cranked portion 21 of the stick portion is determined by two imaginary straight lines 52, 53. The straight line 52 extends through the mounting axis 17 and the deflector axis 29 of the cranked stick portion 51. The straight line 52 extends through the deflector axis 29 and preferably runs parallel to the lower side 43 of the stick 14. A straight line 53 also extends through the deflector axis 29 and the stick bearing point 41 .

[0032] The length of the cranked stick portion 51 can be determined by the angle α and the height HS between the mounting axis 17 and the deflector axis 29. The distance between the mounting axis 17 and the deflector axis 29 includes the height HS.

[0033] The cranked stick portion 51 has the same width as the main portion 50 of the stick 14. In the case of very long sticks 14, the main stick portion 50 can taper towards the cranked stick portion 51. The width of the cranked stick portion 51 and the distance between the side plates 36 of the connecting device 33 are adapted to each other.

[0034] Figure 4 shows a perspective view of mounting device 21. Figure 5 is a schematic side view of mounting device 21 shown in Figure 4.

[0035] The coupling device 33 comprises two side plates 36 arranged at a distance from each other. The side plates 36 can be connected to at least one connection plate 34 extending between the side plates 36. The at least one connection plate 34 can rest on the upper side of the rotation device 22 and is preferably removably fixed thereto. A connection level 65 is formed between the upper side of the rotation device 22, to which the coupling device 33 is attached, and the coupling device 33, in particular the connection plate 34 of the coupling device 33. Each side plate 36 comprises a coupling bearing point 37 and a mounting bearing point 38. The coupling bearing points 37 and the mounting bearing points 38 are offset from each other by a height HK. The add-on storage locations 38 are recessed relative to the coupling storage locations 37. The mounting bearing points 38 of the coupling device 33 are located, for example, on the connection level 65. Alternatively, the mounting bearing points 38 can also be offset in the direction of or located in a rotation plane 39 of the rotation device 22. The mounting bearing points 38 are offset laterally outward relative to the mounting device 21 , in particular the rotating device 22 , or are assigned to the end faces of the rotating device 22 .

[0036] Between the connection level 65 of the mounting device 21 and the coupling bearing point 37, a distance HA is preferably provided that is less than or equal to 2.5 times the diameter of the bearing pin at the coupling bearing point 37. Preferably, the coupling bearing point 37 is provided adjacent to the connection level 65. Furthermore, the mounting bearing point 38 can be provided positioned at a distance HB from the mounting device 21, which is less than 2.5 times the diameter of the bearing bolt at the mounting bearing point 38. Preferably, the bearing pin at the coupling bearing point 37 and the mounting bearing point 38 have the same diameter. In particular, the mounting bearing point 38 is provided adjacent to the end face of the rotary drive part 24 or adjacent to a flat surface 69. The flat surface 69 is adjacent to the end face of the rotary drive part 24. The distances HA and / or HB are preferably the same, which allows for a reduction in the lever arm and thereby reduces the separation force between the stick and the tool. The separation force is understood to be, for example, the force required to overcome static friction in the bearing and initiate the transition to sliding friction. The separation force is therefore the force required to transform the bearing from a static state to a dynamic state.

[0037] The height HK between the connection bearing point 37 and the mounting bearing point 38 may be the same as the distance HA or may be different from each other.

[0038] The connection bearing point 37 and the mounting bearing point 38 are disposed at an angle β relative to the plane of rotation 39. The angle β is determined by two imaginary straight lines 56, 57. The imaginary straight line 56 extends through the connection bearing point 37 and the mounting bearing point 38. The imaginary straight line 57 extends through the plane of rotation 39 or is aligned parallel to the plane of rotation 39. The imaginary straight line 57 can also be located on a cover surface 67 at least partially formed in the drive housing 66 of the rotation device 22. The mounting bearing point 38 can be located on the straight line 57 or below in the direction of the plane of rotation 39, preferably within the height formed by the straight line 57 and the plane of rotation 39. Preferably, the angle β between the straight lines 56, 57 is in the range of 15 to 60°. In particular, an angle β of 30° is provided. This angle β preferably corresponds to the angle α.

[0039] 6 shows a schematic cross-section along line VI-VI shown in FIG. 4. The rotation device 22 has a flat 69 between the upper side or connection level 65 and an end face 68 of the rotation device 22. This flat 69 can be flat, for example, at a 45° angle relative to the connection level 65. The flat 69 can also be at an angle, for example, relative to the connection level 65. In particular, this flat 69 can shift the attachment point 38 of the side plate 36 closer to the rotation device 22 and / or downward relative to the connection level 65. This arrangement is particularly advantageous in that it can reduce the introduction of forces from the stick 14 into the attachment device 21, thereby reducing shear forces acting on the coupling device 33 of the attachment device 21 during operation.

[0040] The coupling device 33 is preferably connected to the rotation device 22 by means of a threaded connection 83. In particular, the one or more connection plates 34 contact the upper side of the rotation device 22 and the flat part 69 of the rotation device 22 and are fixed in particular by means of the threaded connection 83. This removable arrangement of the coupling device 33 relative to the rotation device 22 also enables an increased adaptability by possible exchange of the coupling device 33 relative to the rotation drive 24 and the coupling 23.

[0041] A lowering of the set height of the attachment device 21, which can be achieved in particular by moving the mounting bearing point 38 towards the connection level 65 in the direction of the rotation plane 39 or below the connection level 65, improves the kinematics of the stick 14 and the attachment device 21 to the extent that the overload height and / or separation force can be increased, particularly if the mounting bearing point 38 is located in the rotation plane 39.

[0042] The mounting device 21 according to FIGS. 4 to 6 also has the advantage that the integration of the rotation device 24 and the coupling 23 makes it possible to reduce the number of hydraulic connections for controlling the work tool 25. For example, the number of connections in the coupling 23 can be reduced from five connections to three connections. Two of the connections serve the main function, namely the supply and return of the hydraulic fluid, in particular hydraulic oil. The third connection is intended for so-called oil leakage. The connection or integration of the coupling 23 to the rotary actuator 24 makes it possible for the hydraulic connections required for controlling the rotary actuator to be provided in the rotary actuator 24 and / or in the coupling 23, and to be permanently connected to each other.

[0043] FIG. 7 is a perspective view of the stick 14 shown in FIG. 3 and the hinged mounting device 21 shown in FIG. 4. A fork-shaped connection 20 is provided between the pivoting mechanism 27 and the mounting device 21. The pivoting mechanism 27 has two deflectors 28, each positioned outside the stick portion 51 and attached to a deflector shaft 29. The deflectors 28 face each other and engage with the pivot shaft 35 of the pivoting mechanism 27. The coupling portion 31 of the pivoting mechanism 27 is fork-shaped. The coupling portion 31 has two coupling arms 64 facing the mounting device 21. Each of the coupling arms 64 preferably engages with the outside of the side plate 36 of the connecting device 33. Each end of the coupling arms 64 is pivotally attached to a connecting bearing point 37, preferably by a pin. On the opposite side of the coupling arms 64, the connecting portion 31 includes, for example, a connecting stick 65. The width of this connecting stick 65 is less than the distance between the two connecting arms 64. The connecting stick 65 may be provided with a recess, by means of which the piston rod of the pressure cylinder 16 can be positioned between them and engage with the pivot shaft 35.

[0044] The height HK of the connection bearing point 37 and the mounting bearing point 38 of the connection device 33 advantageously corresponds to the height HS of the cranked stick portion 51. The height HS is formed by the distance between the mounting axis 17 and the deflector axis 29. The cranked stick portion 51 is positioned between the side plates 36. The mounting axis 17 of the cranked stick portion 51 is aligned with the mounting bearing point 38, whereby they are pivotally connected to each other by a bearing pin.

[0045] In this embodiment, for example, the deflector 28 is straight. This allows it to absorb larger forces. This embodiment is preferably used for small excavators, or medium or large excavators. In the embodiment shown in Figures 8 and 9, the deflector 28 is C-shaped or curved. This embodiment is preferably used for mini excavators.

[0046] Figure 8 shows a schematic side view of the stick 14 with the mounting device 21 in a first pivoted or working position. In Figure 9 the stick 14 is shown with the mounting device 21 in another pivoted or working position which differs from the arrangement in Figure 7.

[0047] The stick 14 with cranked stick portion 51 allows the mounting device 21 to pivot in the direction of the underside 43 of the stick 14 at a pivot angle A of up to 60° relative to the imaginary straight line 52. The offset arrangement of the mounting bearing points 38 relative to the connecting bearing points 37 and the cranked stick portion 51 allows the rotation device 22 to be positioned with its axis of rotation approximately parallel to or parallel to the imaginary straight line 52.

[0048] Figure 9 shows another pivoted position of the mounting device 21, in the opposite direction to that of Figure 8. A pivot angle B of up to 160° can be assumed relative to an imaginary straight line 53 passing through the deflector axis 29. This pivoted position can be assumed by the cranked stick portion 51. This results in a pivoted angle of the mounting device 21 relative to the cranked stick portion 51 of up to 220°.

[0049] Figure 10 shows an alternative embodiment of the stick 14. The stick portion 51 is not bent relative to the main stick portion 50. Such a stick 14 is referred to as a straight stick. The upper and / or lower sides of the stick portion 51 and the main stick portion 50 are provided to lie in a common plane. In all other respects, the description of the stick 14 above applies.

[0050] Figure 11 is a perspective view of the stick 14 according to Figure 10 and the attachment device 21 according to Figure 4. The pivoting movement of the attachment device 21 relative to the stick 14 is controlled using a pivoting mechanism 27, which corresponds to the embodiment shown in Figure 7. A fork-shaped coupling 31 is used. This embodiment thus comprises a fork-shaped connection 20 between the pivoting mechanism 27 and the attachment device 21.

[0051] Figure 12 shows an alternative embodiment of the stick 14 shown in Figures 2 and 3. The stick 14 has a cranked stick portion 51 towards the main stick portion 50. In contrast to the embodiment according to Figures 2 and 3, the cranked stick portion 51 according to Figure 12 is fork-shaped. The cranked stick portion 51 has two fork arms 61 that are spaced apart from each other. A deflector axis 29 and a mounting axis 17 are provided on each fork arm 61. Preferably, the distance between the fork arms 61 in the region where the deflector axis 29 is provided is shorter than the distance between the fork arms 61 in the region towards the free end 48 of the stick, where the mounting axis 17 is located. This has the advantage that similar or identical proportions exist for connecting the mounting device 21 to the stick 14, as in the embodiment according to the stick in Figures 2 and 3 and 9.

[0052] 13 is a perspective view of the stick 14 according to FIG. 12 with the attachment device 21 according to FIG. 4 in a pivoted position. A fork-shaped connection 20 is formed between the stick 14 and the attachment device 21. In this embodiment, the pivoting mechanism 27 has a coupling 31 that is, for example, rod-shaped. Alternatively, in this embodiment according to FIG. 12, it may be provided that the coupling 31 can also be designed as a fork-shaped coupling 31 with two connecting arms 64. Preferably, the coupling 31 can be designed as a welded structure, in which two rod-shaped metal sheets are connected to a web, preferably also made of sheet metal, and the rod-shaped metal sheets engage both the pivot axis 35 and the connecting bearing point 37. Alternatively, the welded structure can also be designed as a cast structure.

[0053] Figure 14 shows an alternative embodiment of the stick 15 to that of Figure 11. This embodiment differs from that in Figure 11 in that the stick portion 51 is straight relative to the main stick portion 50. No offset of the stick portion 51 is provided. In all other respects the description of Figure 12 applies.

[0054] Figure 15 shows a perspective view of the stick 14 shown in Figure 14 and the attachment device 21 shown in Figure 4 in the working position. In this embodiment, the swivel mechanism 27 is designed in the same way as that of Figure 12. A fork-shaped connection 31 can also be provided as an alternative in this regard.

Claims

1. An excavator stick, with a stick portion (51) provided at the stick end (48) provided on the main stick portion (50), a mounting shaft (17) provided at the stick end (48) of said stick portion (51), with a mounting device (21) having a mounting bearing point (38) of a connecting device (33) pivotally mounted about said mounting shaft (17); a deflector shaft (29) located adjacent to the mounting shaft (17) at the stick end (48); a pivot mechanism (27) comprising a pivot shaft (35) to which a deflector (28) and a coupling part (31) are attached in abutment, the deflector (28) engaging the pivot shaft (35) on the opposite side of the deflector axis (29) and the coupling part (31) engaging on the opposite side of the coupling bearing point (37) of the coupling device (33); wherein the stick is a fork-shaped connection (20) is provided between the stick (14) and the mounting device (21) and / or between the swivel mechanism (27) and the mounting device (21); Features a stick.

2. 2. A stick according to claim 1, characterized in that the distance (HB) between the mounting bearing point (38) of the connecting device (33) and the end face or flat part (69) of the attachment device (21) and / or the distance (HA) between the connection bearing point (37) of the connecting device (33) and the cover face (67) of the attachment device (21) is not more than 2.5 times the diameter of the bearing bolt at the mounting bearing point (38) of the connecting device (33) and / or at the connection bearing point (37).

3. 3. A stick according to claim 1 or 2, characterized in that the fork-shaped connection (20) between the stick (14) and the attachment device (21) is formed by a fork-shaped stick portion (51) towards the stick end (48), the fork-shaped stick portion (51) having two fork arms (61) arranged at a distance from each other.

4. 4. A stick according to claim 3, characterized in that the mounting axis (17) and the deflector axis (29) are provided on the fork arms (61) of the forked stick part (51).

5. A stick according to claim 3 or 4, characterized in that the fork-shaped stick portion (51) is straight or cranked relative to the main stick portion (50).

6. A stick according to any one of claims 3 to 5, characterized in that in each case one deflector (28) is attached inside a fork arm (61) at the deflector axis (29), and that the connecting part (31) is rod-shaped and is preferably located between two side plates (36) of the connecting device (33).

7. 2. A stick according to claim 1, characterized in that the fork-shaped arrangement (20) between the pivoting mechanism (27) and the attachment device (21) comprises a fork-shaped coupling part (31) with two coupling arms (64, 65) articulated to the coupling device (33).

8. 8. A stick according to claim 7, characterized in that the fork-shaped connecting portion (31) engages with each connecting arm (64, 65) on the respective outside or inside of a side plate (36) of the connecting device (33).

9. 9. A stick according to claim 7 or 8, characterized in that the stick part (51) is designed as a stick part (28) without forks, and in each case a deflector (28) is attached to the deflector axis (29) on the outside of the stick part (51) without forks, and the deflector (28) is attached to the pivot axis (35) on each outside of the connection part (31).

10. A stick according to claim 9, characterized in that the forkless stick part (51) is straight or cranked relative to the main stick part (50).

11. 11. A stick according to any one of claims 1 to 10, characterized in that the coupling device (33) is articulated at the mounting axis (17) of the stick part (51) to a mounting bearing point (38), a coupling bearing point (37) being provided on the coupling device (33) onto which the coupling part (31) of the swivel mechanism part (27) engages, and the mounting bearing point (38) is offset relative to the coupling bearing point (37) in the direction of a plane of rotation (39) of the rotation device (22) of the attachment device (21).

12. 12. A stick according to claim 11, characterized in that the mounting bearing point (38) is offset from the connecting bearing point (37) by a height (HK).

13. 13. A stick according to claim 11 or 12, characterized in that the mounting bearing point (38) and the connecting bearing point (37) are arranged at an angle (β) with respect to a plane of rotation (39) of the rotation device (22) or with respect to a plane parallel to the plane of rotation (39) of the rotation device (22), the angle (β) being resulting from two imaginary straight lines (56, 57), one of the imaginary straight lines (56) extending through the connecting bearing point (37) and the mounting bearing point (38), and the other imaginary straight line (57) lying in the plane of rotation (39) or aligned parallel to the plane of rotation (39) and extending through the mounting bearing point (38).

14. Stick according to claim 13, characterized in that the imaginary straight lines (56, 57) are arranged at an angle (β) of between 15 and 45°, preferably between 25 and 35°.

15. A stick according to any one of claims 1 to 14, characterized in that the cranked stick portion (51) is arranged at an angle (α) to the underside (43) of the main stick portion (50), the angle (α) being determined by two imaginary straight lines (52, 53), one of the imaginary straight lines (52) extending through the mounting axis (17) and the deflector axis (29), and the other imaginary straight line (53) extending through the deflector axis (29) and being aligned parallel to the underside (43) of the main stick portion (50) or extending through the deflector axis (29) and the bearing point (41).

16. A stick according to claim 15, characterized in that the cranked stick portion (51) is cranked upwards at an angle (α) of 15 to 45°, preferably 25 to 35° relative to the lower side (43) or the upper side (45) of the main stick portion (50).

17. A stick according to claim 15 or 16, characterized in that the mounting axis (17) of the cranked stick portion (51) is arranged at a distance (HS) from the deflector axis (29), preferably the mounting axis (17) being located above the upper side (45) of the main stick portion (50).

18. A stick according to any one of claims 11 to 17, characterized in that the height (HK) between the connection bearing point (37) and the mounting bearing point (38) corresponds to the height (HS) of the cranked stick part (51) between the mounting axis (17) and the deflector axis (29).

19. A stick according to any one of claims 13 to 18, characterized in that the angular extent of the imaginary straight lines (56, 57) of the attachment device (21) and the angular extent of the imaginary straight lines (52, 53) of the cranked stick portion (51) are equal.

20. A stick according to any one of claims 1 to 19, characterized in that the deflector axis (29) is provided in the transition area between the main stick part (50) and the cranked stick part (51) or in that the deflector axis (29) is provided in the cranked stick part (51).

21. A stick according to any one of claims 1 to 20, characterized in that the cranked stick portion (51) has a length of less than 20% of the total length of the stick (14).

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