Excavator Dipper

Abstract

The present invention relates to a dipper (14) for an excavator (11). The dipper (14) has a mounting shaft (17) provided at a dipper end (48), on which a mounting device (21) can be arranged on the dipper (14) using a coupling unit (33), thereby allowing pivoting about the mounting shaft (17) and securing a working device (25) to the mounting device (21). The dipper (14) has a main dipper section (50) having a dipper bearing point (41) and another dipper bearing point (42) for a dipper cylinder (18), which are offset from each other and provided on the opposite side of the dipper end (48) of the dipper (14). The dipper (14) has a pressure cylinder bearing (46) for a pressure cylinder (16), which is provided on an upper side (45) of the main dipper section (50). The dipper (14) includes a deflector fulcrum (29) for the deflector (28) in the pivot mechanism system (27). The deflector fulcrum (29) is located closer to the mounting axis (17) than the dipper bearing point (41). The dipper (14) is characterized in that the dipper end (48) includes an angled dipper portion (51) at which the mounting axis (17) is located, and the angled dipper portion (51) is angled upward relative to the upper side (45) of the main dipper portion (50).

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 the swivel mechanism stick. The swivel mechanism includes a connecting portion and a deflector, which are pivotally arranged on a common axis that engages the pressure cylinder. The deflector engages at its opposite end with the deflector axis of the stick, and the connecting portion engages with the opposite end of the connecting device. 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 invention is based on the problem of creating an excavator stick with a controllable attachment having a larger swing range. [Means for solving the problem]

[0005] This problem is solved by an excavator stick, the end of which has a cranked stick section. The cranked stick section is provided with a mounting shaft for connecting the mounting device, and the cranked stick section is cranked upward relative to the upper side of the main stick section. The cranked stick section at the end of the stick allows for an increased range of rotation of the attachment both in the direction of the lower side of the main stick section and in the opposite direction to the upper side of the stick. Additionally, the design of the main stick section and the connection on the excavator side can be maintained.

[0006] This arrangement can also allow for improved power transmission from the pressure cylinder of the main stick portion to the attachment attached to the mounting device.

[0007] 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 deflection axis can be located in the cranked stick part, i.e. outside the transition area between the main stick part and the cranked stick part.

[0008] Alternatively, the deflector axis may be provided on the stick.

[0009] Advantageously, the cranked stick portion is provided at an angle α between two imaginary straight lines, where 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 and the stick mounting axis of the stick. 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.

[0010] 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 has been found to be advantageous for the use and connection of the attachment device, so that shear forces occurring in the connecting device at the attachment device can be reduced by a more favorable force transmission.

[0011] Furthermore, preferably, a coupling device in the mounting device is provided to pivotally connect to a mounting bolt on the mounting shaft of the cranked stick portion. The coupling bolt is provided on the coupling device, on which a coupling portion of the swivel mechanism engages. The swivel mechanism has a deflector that engages with the deflector shaft of the stick, and the swivel mechanism is pivotally controlled by a pressure cylinder. The coupling portion and the deflector of the swivel mechanism are aligned with each other so that the coupling bolt of the coupling device can be positioned adjacent to the deflector shaft of the stick when the mounting is swiveled relative to the top of the stick. By connecting the mounting to the cranked stick, an extended swivel range can be achieved.

[0012] Furthermore, preferably the mounting bolt and the connecting bolt of the connecting device are cranked in height relative to each other, and preferably the mounting bearing point of the mounting device is cranked towards the rotation device, so that the connecting bolt can be positioned above the rotation device and the mounting bearing point can be cranked, i.e. recessed, towards the rotation drive.

[0013] Preferably, the height between the connecting bolt and the mounting bearing point on the connecting device, on the one hand, is equal to the height between the mounting axis of the cranked stick portion and the deflector axis of the stick, on the other hand.

[0014] Furthermore, the mounting bearing points and the 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 bolts, and the second or other imaginary straight line extends cranked in the plane of rotation or parallel to the plane of rotation of the rotating device of the mounting device. The cranked arrangement of the connecting bolts and the mounting bearing points of the connecting device allows the mounting bearing points of the connecting device to be cranked in the direction of the plane of rotation of the rotating 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.

[0015] 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 allows an advantageous connection of the attachment device to the cranked stick portion of the stick.

[0016] Preferably, the angular range of the imaginary straight line of the mounting device and the angular range of the imaginary straight line of the cranked stick are the same, which allows for a maximum pivoting range or maximum opening angle to be achieved, which may be 200°, within which the mounting device can be pivoted relative to the cranked stick.

[0017] Furthermore, the length of the stick portion is preferably 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.

[0018] According to a preferred embodiment, the cranked stick portion is designed as a rod, box, tube or rigid profile. This cranked stick portion is directly connected to the structure of the stick. When viewed from above the stick, the cranked stick portion can be as wide as the stick or narrower.

[0019] Alternatively, the cranked stick portion can be provided in a fork shape. The fork-shaped cranked stick portion has two fork arms that are aligned at a distance from each other and extend to the free end of the cranked stick portion. The fork-shaped ends of the stick portion can be positioned inside or outside the side plate of the mounting device to connect the two bearing points of the mounting device to the mounting shaft of the cranked stick portion and to connect the mounting bearing points to the deflector shaft. This arrangement can also create an extended pivot range of the mounting device relative to the stick.

[0020] Preferably, both the deflector shaft and the mounting shaft are located on the cranked stick portion of the fork-shaped shaft.

[0021] The invention as well as other advantageous and alternative embodiments will be 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]

[0022] [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. 3 with the attachment device according to FIG. 4. [Figure 8] 5 is a schematic side view of the stick according to FIG. 1 with the attachment device according to FIG. 4 in a first working position. [Figure 9] 7 is a schematic cross-sectional view of the arrangement according to FIG. 6, with the mounting device in another working position. [Figure 10] FIG. 4 is a top perspective view of an alternative embodiment of the stick of FIG. 3. [Figure 11] 11 is a perspective view of an alternative embodiment of the stick according to FIG. 4; FIG. [Figure 12] 12 is a perspective view from above of the attachment device shown in FIG. 11 arranged on a stick according to FIG. 10; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0023] 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 to 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. At least one pressure cylinder 16 is provided on the stick 14, thereby actuating an 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 working device 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. The pivoting mechanism 27 comprises a deflector 28, which is articulated at one end to a deflector axis 29 relative to the stick 14. 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 at least a 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.

[0024] 2 shows a schematic enlarged side view of the stick 14. FIG. 3 shows a perspective view of the stick 14 shown in FIG.

[0025] 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 formed 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 designed 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.

[0026] 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 of the stick portion 21 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 .

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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 connecting plate 34 extending between the side plates 36. The at least one connecting 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, on which the coupling device 33 is mounted, and the coupling device 33, in particular the connecting 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 point 37 and the mounting bearing point 38 are cranked relative to each other by a height HK. The mounting bearing point 38 is recessed relative to the coupling bearing point 37. The mounting bearing point 38 of the coupling device 33 is located, for example, on the connection level 65. Alternatively, the mounting bearing point 38 can also be cranked towards or located in a rotation plane 39 of the rotation device 22. The mounting bearing points 38 are bent laterally outwardly in a crank-like manner relative to the mounting device 21 , in particular the rotating device 22 , or are assigned to the end faces of the rotating device 22 .

[0031] 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 an at least partially formed cover surface 67 of 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 provided 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.

[0032] 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 inclined, for example, at a 45° angle relative to the connection level 65. The flat 69 can also be provided at an angle, for example, relative to the connection level 65. In particular, this flat 69 can move the mounting bearing point 38 of the side plate 36 closer to the rotation device 22 and / or crank 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 mounting device 21, thereby reducing shear forces acting on the coupling device 33 of the mounting device 21 during operation.

[0033] 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 inclined surface 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 for the rotation drive 24 and the coupling 23, since the coupling device 33 can be exchanged.

[0034] By lowering the set height of the attachment device 21, which can be achieved in particular by shifting the attachment bearing point 38 towards or below the connection level 65 in the direction of the rotation plane 39, the kinematics of the stick 14 and the attachment device 21 are improved to the extent that the overload height and / or separation force can be increased. This is especially the case when the attachment bearing point 38 is located in the rotation plane 39.

[0035] The mounting device 21 according to FIGS. 4 to 6 also has the advantage that the integration of the rotary 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 of supplying and returning 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 in the rotary actuator 24 makes it possible for the hydraulic connections required to control 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.

[0036] 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 bolt. 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.

[0037] The height HK between the connection bearing point 37 and the mounting bearing point 38 of the connecting device 33 corresponds to the height HS of the cranked stick portion 51, which is formed by the distance between the mounting axis 17 and the deflector axis 29. The cranked stick portion 51 is provided 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 bolt.

[0038] 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.

[0039] Figure 8 shows a schematic side view of the stick 14 with the attachment device 21 in a first pivoted or working position. In Figure 9 the stick 14 is shown with the attachment device 21 in another pivoted or working position which differs from the arrangement in Figure 7.

[0040] 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 cranked 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 or parallel to the imaginary straight line 52.

[0041] 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°.

[0042] 10 is a perspective view from above of an alternative embodiment of the stick 14 shown in FIG. 2. In the embodiment according to FIG. 8, the cranked stick portion 51 is designed differently from the embodiment of FIG. 3. The cranked stick portion 51 is fork-shaped. It comprises two fork arms 61. Both the deflector axis 29 and the mounting axis 17 are provided on the fork arms 61. With regard to the height HS as well as the angle α between the imaginary straight lines 52 and 53, the same applies to this fork-shaped cranked stick portion 51 as in the embodiment according to FIG. 2. Alternatively, the deflector axis 29 can be located outside the cranked stick portion 51 or in the transition area between the stick 14 and the cranked stick portion 51.

[0043] Figure 11 shows an alternative embodiment of the mounting device 21 to Figure 4. The mounting bearing points 38 arranged on the side plates 36 are adapted for connection to the fork-shaped cranked stick portion 51.

[0044] FIG. 12 shows a perspective view of the stick 14 with the mounting device 21 pivotally arranged thereon. The outer fork end of the fork-shaped cranked stick portion 51 grips the side plate 36 on the outside for articulated connection with the mounting bearing point 38. The deflector 28 of the pivoting mechanism 27 engages at one end with the deflector axis 29 of the cranked stick portion 51 and at the opposite end with the connection point 37. In this embodiment, the pivoting mechanism 27 has a connecting part 31 that is, for example, rod-shaped. Alternatively, in this embodiment according to FIG. 12, it may be provided that the connecting part 31 can also be designed as a fork-shaped connecting part with two connecting arms 64. Preferably, the connecting part 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 connection bearing point 37. Alternatively, the welded structure can also be designed as a cast structure.

[0045] As in the embodiment shown in Figures 1 to 9, this fork-shaped crank stick portion 51 creates a similarly large turning range.

Claims

1. The stick of the excavator (11), A mounting shaft (17) is provided at one end of the stick (48), and a mounting device (21) with a connecting device (33) is positioned thereon so as to be pivotable around the mounting shaft (17), and a work tool (25) can be attached to the mounting device (21), with the mounting shaft (17), The main stick portion (50) comprises a stick bearing point (41) and another stick bearing point (42) for the stick cylinder (18), which are arranged in a crank shape and are located on the opposite side of the stick end (48) of the stick (14). The main stick portion (50) is provided with a pressure cylinder bearing (46) for the pressure cylinder (16) located on the upper side (45), A deflector shaft (29) for the deflector (28) of the swivel mechanism (27) is positioned closer to the mounting shaft (17) than the stick bearing point (41), Here, the stick is, The end of the stick (48) is provided with a crank-shaped stick portion (51), and the mounting shaft (17) is positioned thereon, and The crank-shaped stick portion (51) is bent upward in a crank shape relative to the upper side (45) of the main stick portion (50). A stick characterized by...

2. The stick according to claim 1, characterized in that the deflector shaft (29) is provided in a transitional region between the main stick portion (50) and the crank-shaped stick portion (51), or the deflector shaft (29) is provided on the crank-shaped stick portion (51).

3. The crank-shaped stick portion (51) is positioned at an angle (α) with respect to the main stick portion (50), the angle (α) being determined by two virtual straight lines (52, 53), where one of the virtual straight lines (52) extends through the mounting shaft (17) and the deflector shaft (29), and the other virtual straight line (53) extends through the deflector shaft (29) and is aligned parallel to the lower side (43) of the main stick portion (50), or extends through the deflector shaft (29) and the bearing point (41) of the main stick portion (50), as described in claim 1.

4. The stick according to claim 3, characterized in that the crank-shaped stick portion (51) is bent upward in a crank shape at an angle (α) of 15 to 45°, preferably 25 to 35°, with respect to the lower side (43) or upper side (45) of the main stick portion (50).

5. The stick according to claim 1, characterized in that the mounting shaft (17) in the crank-shaped stick portion (51) is positioned at a distance (HS) from the deflector shaft (29).

6. The stick according to claim 1, characterized in that the mounting shaft (17) is located above the upper part (45) of the main stick portion (50).

7. The stick according to claim 1, characterized in that the connecting device (33) is articulated to a mounting bearing point (38) on the mounting shaft (17) of the crank-shaped stick portion (51), the connecting bearing point (37) is provided on the connecting device (33) and the connecting portion (31) of the swivel mechanism portion (27) engages thereon, and the mounting bearing point (38) is arranged bent in a crank shape relative to the connecting bearing point (37) in the direction of the rotating device (22) of the mounting device (21).

8. The stick according to claim 7, characterized in that the mounting bearing point (38) is bent in a crank shape from the connecting bearing point (37) by a height (HK).

9. The stick according to claim 7, characterized in that the height (HK) between the connecting bearing point (37) and the mounting bearing point (38) corresponds to the height (HS) between the mounting shaft (17) and the deflector shaft (29) of the crank-shaped stick portion (51).

10. The stick according to claim 7, wherein the mounting bearing point (38) and the connecting bearing point (37) are positioned at an angle (β) with respect to the rotation plane (39) of the rotating device (22), or are positioned parallel to the rotation plane (39) of the rotating device (22), and the angle is formed by two virtual straight lines (56, 57), where one of the virtual straight lines (56) extends through the connecting bearing point (37) and the mounting bearing point (38), and the other virtual straight line (57) is located on the rotation plane (39) or is aligned parallel to the rotation plane (39) and extends through the mounting bearing point (38).

11. The stick according to claim 10, characterized in that the virtual straight lines (56, 57) are arranged at an angle (β) of 15 to 45° or 25 to 35°.

12. The stick according to claim 1, characterized in that the crank-shaped stick portion (51) is less than 20% of the total length of the stick (14).

13. The stick according to claim 1, characterized in that the length of the crank-shaped stick portion (51) extends from the deflector shaft (29) to the free end of the crank-shaped stick portion (51).

14. The stick according to claim 1, characterized in that the crank-shaped stick portion (51) is designed to be rod-shaped, box-shaped, tubular, or have a rigid outer shape.

15. The stick according to claim 1, characterized in that the crank-shaped stick portion (51) is fork-shaped and has two fork arms (61) which are aligned at a distance from each other and extend to the free end (48) of the crank-shaped stick portion (51).

16. The stick according to claim 15, characterized in that the deflector shaft (29) and the mounting shaft (17) are located on the fork-shaped crank-shaped stick portion (51).

Images