Dipper for an excavator

Abstract

The invention relates to a dipper(14) for an excavator, comprising a dipper section (51) provided at the dipper end (48), provided in a dipper main section (50), comprising an attachment axis (17) provided at a dipper end (48) of the dipper section (51), on which an attachment device (21) is pivotally mounted about the attachment axis (17) with an attachment bearing point (38) of a coupling unit (33), comprising a deflector fulcrum (29) provided adjacent to the attachment axis (17) at the dipper end (48), comprising a pivot kinematics system (27), having a pivot fulcrum (35), on which a deflector (28) and a coupler (31) are mounted together, wherein the deflector (28) engages the deflector fulcrum (29) at the opposite end from the pivot fulcrum (35) and the coupler (31) engages a coupler bearing point (37) on the coupling unit (33) at the opposite end, wherein a fork-type link (20) is provided between the dipper (14) and the attachment device (21) and / or between the pivot kinematics system (27) and the attachment device (21).

Description

[0001] Handle for an excavator

[0002] The invention relates to a boom for an excavator, on which an attachment device with a coupling device can be arranged pivotably about an attachment axis on the boom.

[0003] From DE 20 2011 100 482 U1 an excavator is known which pivotally accommodates an attachment at the free end of the boom, which is pivotally connected about an attachment axis on the boom to a coupling device of the attachment. A pivot drive is provided on the coupling device, which in turn has a coupling opposite the coupling device for receiving a work tool. To control a pivoting movement of the attachment about the attachment axis of the boom, a pressure cylinder is provided on an upper side of the boom. A piston rod of the pressure cylinder engages a pivot kinematics. This pivot kinematics comprises a coupler and a deflector, which are arranged pivotably about a common axis, to which the pressure cylinder engages, wherein the deflector engages at the opposite end in a deflection axis of the boom and the coupler engages with the opposite end on the coupling device.The top and bottom of the handle are tapered toward the attachment axis. The design of such a handle, with the attachment connected to the attachment axis located at the end of the handle, enables a wide range of applications. However, there are applications where the swivel mobility of the attachment relative to the handle is insufficient.

[0004] The invention is based on the object of creating a stick for an excavator in order to reduce a breakout force from an attachment to a stick.

[0005] This task is solved by a stick for an excavator in which a fork-shaped connection is provided between the stick and the attachment and / or between the swivel kinematics and the attachment. This fork-shaped connection allows the attachment to be positioned closer to an attachment axis on the stick. In addition, this fork-shaped connection makes it possible to position the attachment closer to the base machine. This can reduce the distance between the attachment and the stick. This allows a shortening of the effective lever arms and leads to a reduction in the breakout force. This can also enable improved handling and an increased swivel range of an implement around the attachment axis at the end of the stick.

[0006] Preferably, the distance between the attachment bearing point of the coupling device and a front face or a slope of the attachment device and / or the distance between the coupling bearing point of the coupling device and a cover surface of the attachment device is equal to or less than 2.5 times the bolt diameter of the attachment bearing point and / or the coupling bearing point of the coupling device. This has the advantage of shortening the effective lever arms between the work tool and the handle. This also allows the breakout force to be reduced. At the same time, the process forces can also be increased.

[0007] According to a first embodiment, it is preferably provided that the fork-shaped connection between the handle and the attachment device is formed by a fork-shaped handle section facing the handle end, which has two fork arms arranged at a distance from one another. This design of the fork-shaped handle section allows a part of the attachment device for connection to the handle end to be positioned between the two fork arms.

[0008] Preferably, the attachment axis and the deflector axis are provided in the fork arms of the fork-shaped handle section. This allows for a compact and shortened arrangement for accommodating the attachment device and / or the pivot kinematics.

[0009] The forked stem section can be designed as a straight stem section. A straight stem section can be understood as a connection of the stem section to the main stem section, in which the top and / or bottom of the stem section and the main stem section lie in a common plane. Alternatively, the forked stem section can be designed to be offset relative to the main stem section. In a offset arrangement of the stem section relative to the main stem section, the offset stem section is oriented upwards at an angle relative to the main stem section.

[0010] In the embodiment with the fork-shaped handle section, it is preferably provided that a deflector is positioned on the inside of each fork arm and mounted on the deflector axis in the fork arm. The coupling is preferably rod-shaped and preferably engages between two cheeks of the coupling device. This allows the pivoting range toward the top of the handle to be further increased.

[0011] According to an alternative embodiment, the fork-shaped connection between the swivel kinematics and the attachment device comprises a fork-shaped coupling with two coupling arms, wherein the coupling arms are articulated to the coupling device. Preferably, a coupling rod can be formed opposite the coupling arms.

[0012] The pivoting kinematics, which preferably comprises the forked coupling, can be provided on a fork-free handle section that is aligned with the handle end. A fork-free handle section can be understood as meaning that the handle section and the main handle section form a unit and, for example, the side cheeks and / or the top and / or bottom lie in one plane. This embodiment with the fork-free handle end and the forked coupling of the pivoting kinematics has the advantage that the attachment device can be shortened in its connection to the handle. This also enables an increased pivoting angle. The forked coupling of the pivoting kinematics preferably engages an outer side of the cheeks of the coupling device with each coupling arm. Alternatively, the coupling arms can also be aligned with an inner side of the cheeks.

[0013] In the design of the fork-free handle section at the handle end, a deflector preferably engages the deflection axis of the handle section on each outer side of the handle section, with the deflector preferably mounted opposite each outer side of the coupling to the pivot axis. This can provide increased pivoting movement of the pivot kinematics.

[0014] The fork-free handle section, on which the pivoting kinematics with the fork-shaped coupling is preferably provided, can be designed to be straight relative to the main handle section. An upper side and / or a lower side of the handle section and the main handle section can lie in the same plane. Alternatively, the fork-free handle section can be designed to be offset relative to the main handle section. In the case of an offset handle section, this can be angled at an angle of less than 180° relative to the upper side of the main handle section. Regarding the straight and offset configurations, reference can be made to the above explanations.

[0015] Furthermore, it is preferably provided that a coupling device of the attachment is articulated to a mounting pin in the mounting axis of the handle section, and a coupling pin is provided on the coupling device, to which a coupling of the pivot kinematics engages, wherein the pivot kinematics has a deflector that engages the deflector axis of the handle, and the pivot kinematics is pivotally controlled by the pressure cylinder. The coupler and the deflector of the pivot kinematics are coordinated with one another in such a way that when the attachment is pivoted towards the top of the handle, the coupling pin of the coupling device can be arranged adjacent to the deflector axis of the handle. By connecting the attachment to the offset handle, an increased pivoting range can be achieved.

[0016] Furthermore, it is preferably provided that the mounting bolt and the coupling bolt of the coupling device are arranged offset in height from one another, and preferably the mounting bearing point is arranged offset in the direction of a rotary drive of the attachment device. This allows the coupling bolt to be located above the rotary drive, and the mounting bearing point to be offset, i.e., recessed, in the direction of the rotary drive.

[0017] Furthermore, it is preferably provided that the attachment bearing point and the coupling pin of the coupling device are arranged at an angle to the attachment device that is formed by two fictitious straight lines, wherein the first or one fictitious straight line extends through the attachment bearing point and the coupling pin and the second or the other fictitious straight line extends offset in a rotation plane or parallel to a rotation plane of a rotating device of the attachment device. Due to this offset arrangement of the coupling pin and the attachment bearing point of the coupling device, the attachment bearing point of the coupling device can be offset towards the rotation plane of the rotating device of the attachment device, thereby enabling a reduction in the installation height of the attachment device relative to the handle. This particularly increases the pivoting angle range towards the underside of the handle.

[0018] Advantageously, the fictitious straight lines of the attachment device are provided at an angle ß of 15° to 45°, preferably 25° to 35°. This, in turn, enables an advantageous connection of the attachment device to the cranked section of the handle.

[0019] Advantageously, the offset stem section is arranged at an angle a between two fictitious straight lines, with the first or one fictitious straight line extending through the attachment axis and the deflector axis, and the second or the other fictitious straight line extending through the deflector axis and a stem connection axis of the stem. This area at the stem end is sufficient to form the offset stem section to increase the pivoting angle range of the attachment device.

[0020] Preferably, the offset handle section is angled toward the top of the handle at an angle a of 15° to 45°, preferably at an angle a of 25° to 35°. This area has proven advantageous for the use and connection of the attachment device.

[0021] Preferably, the angular range of the fictitious straight line of the attachment device and the angular range of the fictitious straight line on the offset handle section are identical. This allows the largest pivoting range or the largest opening angle to be achieved. This opening angle can be 200°, within which the attachment device can be pivoted relative to the offset handle section.

[0022] Preferably, the height between the coupling bolt and the mounting point of the coupling device on the one hand and the height between the mounting axis on the cranked stem section and the deflector axis on the stem on the other hand are of the same design.

[0023] A deflector axis for the swivel kinematics is preferably provided in the transition area between the main stem section and the offset stem section. Alternatively, the deflector axis can also be provided in the offset stem section, i.e., outside the transition area between the main stem section and the offset stem section. Alternatively, the deflector axis can also be provided in the stem.

[0024] Furthermore, it is preferably provided that the length of the stem section is less than 20% of the total length of the stem. The length of the offset stem section preferably extends from the deflector axis to the free end of the offset stem section. This offset and short stem section may be sufficient to increase the pivoting mobility.

[0025] The invention, as well as further advantageous embodiments and developments thereof, are described and explained in more detail below with reference to the examples shown in the drawings. The features shown in the description and the drawings can be used individually or in any combination according to the invention. They show:

[0026] Figure 1 is a schematic side view of an excavator with a boom, an attachment and a working tool,

[0027] Figure 2 is a schematic side view of a stick for an excavator with a cranked stick section,

[0028] Figure 3 is a perspective view of the handle according to Figure 2,

[0029] Figure 4 is a perspective view of an attachment device for connection to the handle according to Figure 2,

[0030] Figure 5 is a schematic side view of the attachment device according to Figure 4,

[0031] Figure 6 is a schematic sectional view of the attachment device along the line IV-IV in Figure 4,

[0032] Figure 7 is a perspective view of the handle according to Figure 2 with an attachment device according to Figure 4 in a working position, Figure 8 is a schematic side view of the handle according to Figure 3 with an attachment device according to Figure 4 in a first working position,

[0033] Figure 9 is a schematic side view of the arrangement according to Figure 6 in a further working position,

[0034] Figure 10 is a perspective view of an alternative embodiment of the handle to Figure 3,

[0035] Figure 11 is a perspective view of the handle according to Figure 9 with an attachment device according to Figure 4 in a working position,

[0036] Figure 12 is a perspective view of an alternative embodiment of the handle to Figure 3,

[0037] Figure 13 is a perspective view of the handle according to Figure 11 with an attachment device according to Figure 4 in a working position,

[0038] Figure 14 is a perspective view of an alternative embodiment of the handle to Figure 11, and

[0039] Figure 15 is a perspective view of the handle according to Figure 13 with an attachment device according to Figure 4 in a working position.

[0040] Figure 1 shows a schematic side view of an excavator 11. The excavator 11 comprises a base machine 13 with a boom 12, which is articulated at the 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 controlling a pivoting movement of the stick 14. At least one pressure cylinder 16 is provided on the stick 14, by means of which an attachment device 21 provided on the stick 14 can be controlled. At the end of the stick 14, the attachment device 21 is pivotally mounted in an attachment axis 17. This attachment device 21 can comprise a rotating device 22 with a rotary drive 24 and a coupling 23, in particular a quick-change coupling. The rotating device 22 comprises a drive housing 66. The rotary drive 24 enables the coupling to rotate relative to the drive housing 66 in a rotational axis 26. An interchangeable working device 25 is provided on the coupling 23.To control a pivoting movement of the attachment device 21, a pivot kinematics system 27 is provided. This comprises a deflector 28, which is pivotally connected to the stem 14 at one end via a deflector axis 29. The pivot kinematics system 27 further comprises a coupling 31, which is connected at one end to the deflector 28 via a common pivot axis 35. At the opposite end, the coupling 31 engages a coupling device 33. This coupling device 33 is a component of the attachment device 21 or is mounted on the attachment device 21. The drive housing 66 preferably has a cover surface 67 extending at least in sections, on which the coupling device 33 is provided. The pressure cylinder 16, in particular a piston rod of the pressure cylinder 16, engages the pivot axis 35 of the pivot kinematics system 27.

[0041] Figure 2 shows a schematically enlarged side view of the stem 14. Figure 3 shows a perspective view of the stem 14 according to Figure 2.

[0042] The boom 14 has a main boom section 50. At one end of the main boom section 50 is a boom bearing point 41, by which the boom 14 is pivotally mounted to the boom boom 12. Adjacent to this is a boom cylinder axis 42, in which the boom cylinder 18 of the boom boom 12 engages. From the boom bearing point 41, a lower side 43, designed as a lower chord, extends to the front boom end 48. Opposite, the boom 14 includes an upper side 45, designed as an upper chord. Provided on the upper side 45 is a pressure cylinder bearing 46 for receiving the pressure cylinder 16. The upper side 45 and the lower side 43 are aligned at an acute angle to one another, running in the direction of the deflector axis 29.

[0043] The handle 14 has a bent handle section 51. This bent handle section 51 is provided at the handle end 48. The handle 14 comprises a main handle section 50 with the handle bearing points 41 and 42 and the bent handle section 51. The mounting axis 17 is provided in the bent handle section 51. The bent handle section 51 extends from the deflector axis 29 toward the top side 45 of the handle 14. The bent handle section 51 is bent upwards at an angle a of, for example, 30° to the bottom side 43 of the handle 14. The angle for the bent of the handle section 21 is determined by two fictitious straight lines 52, 53. The straight line 52 extends through the mounting axis 17 and deflector axis 29 of the cranked stem section 51. The straight line 52 extends through the deflector axis 29 and preferably runs parallel to the underside 43 of the stem 14. The straight line 53 can also extend through the deflector axis 29 and stem bearing point 41.

[0044] The length of the offset stem section 51 can be determined from the angle a and a 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.

[0045] The offset stem section 51 is the same width as the main section 50 of the stem 14. For very long stems 14, the main stem section 50 can taper towards the offset stem section 51. The width of the offset stem section 51 and the distance between the cheeks 36 of the coupling device 33 are adapted to each other.

[0046] Figure 4 shows a perspective view of the attachment device 21. Figure 5 shows a schematic side view of the attachment device 21 according to Figure 4. The coupling device 33 consists of two cheeks 36 arranged at a distance from one another. The cheeks 36 can be connected to at least one connecting plate 34 which extends between the cheeks 36. The at least one connecting plate 34 can rest against an upper side of the rotating device 22 and can preferably be releasably fastened thereto. A connecting plane 65 is formed between the upper side of the rotating device 22, to which the coupling device 33 is fastened, and the coupling device 33, in particular the connecting plate 34 of the coupling device 33. Each cheek 36 comprises a coupling bearing point 37 and an attachment bearing point 38. The coupling bearing point 37 and the attachment bearing point 38 are arranged offset from one another in height HK.The attachment bearing point 38 is recessed relative to the coupling bearing point 37. The attachment bearing point 38 of the coupling device 33 is located, for example, in the connection plane 65. Alternatively, the attachment bearing point 38 can also be offset toward a rotation plane 39 of the rotating device 22 or can be located in this rotation plane 39. The attachment bearing point 38 is offset laterally outward relative to the attachment device 21, in particular the rotating device 22, or is assigned to an end face of the rotating device 22.

[0047] Between the connection plane 65 of the attachment device 21 and the coupling bearing point 37, a distance HA is preferably provided which is equal to or less than 2.5 times the diameter of a bearing pin of the coupling bearing point 37. The coupling bearing point 37 is preferably provided adjacent to the connection plane 65. Furthermore, it can be provided that the attachment bearing point 38 is positioned at a distance HB from the attachment device 21 which is equal to or less than 2.5 times the diameter of a bearing pin of the attachment bearing point 38. The bearing pins of the coupling bearing point 37 and the attachment bearing point 38 are preferably of the same diameter. In particular, it is provided that the attachment bearing point 38 is adjacent to an end face of the rotary drive 24 or to a bevel 69 which is adjacent to an end face of the rotary drive 24.The distances HA and / or HB are preferably designed to be equal, which allows for a reduction in the lever arms and thus reduces the breakaway force between the handle and the tool. Breakaway force, for example, is understood to be a force required to overcome static friction in a bearing and initiate the transition to sliding friction. Thus, the breakaway force is the force required to transform a bearing from a static to a dynamic state.

[0048] The height HK between the coupling bearing actuator 37 and the attachment bearing point 38 can be equal to the distance HA or can differ from each other.

[0049] The coupling bearing point 37 and the attachment bearing point 38 are arranged at an angle ß to the rotation plane 39, which angle is determined by two fictitious straight lines 56, 57. The fictitious straight line 56 extends through the coupling bearing point 37 and the attachment bearing point 38. The fictitious straight line 57 extends through the rotation plane 39 or is aligned parallel to it. This can also lie in the cover surface 67, which is formed at least in sections, of the drive housing 66 of the rotating device 22. The attachment bearing point 38 can lie on the straight line 57 or lower in the direction of the rotation plane 39, preferably within a height formed by the straight line 57 and the rotation plane 39. The angle ß between the straight lines 56, 57 is preferably provided in a range of 15° to 60°. In particular, an angle ß of 30° is provided. This angle ß preferably corresponds to the angle α.

[0050] Figure 6 shows a schematic sectional view along line VI-VI according to Figure 4. The rotating device 22 has a bevel 69 between the top side or the connection plane 65 and an end face 68 of the rotating device 22. This bevel 69 can, for example, be inclined at an angle of 45° to the connection plane 65. Alternatively, the bevel 69 can also be provided at an angle to the connection plane 85. This bevel 69 makes it possible, in particular, for the attachment bearing point 38 of the cheeks 36 to be offset, on the one hand, closer to the rotating device 22 and / or, on the other hand, downwards relative to the connection plane 65. This arrangement has the particular advantage of enabling a reduced introduction of force from the stem 14 into the attachment device 21, whereby shear forces acting on the coupling device 33 of the attachment device 21 during operation can be reduced.

[0051] The coupling device 33 is preferably connected to the rotating device 22 by a screw connection 83. In particular, one or more connecting plates 34 rest on the upper side of the rotating device 22 and on the slope 69 of the rotating device 22 and are fixed in particular by the screw connection 83. This detachable arrangement of the coupling device 33 to the rotating device 22 also enables increased flexibility through a possible exchange of the coupling device 33 to the rotary drive 24 and the coupling 23.

[0052] By reducing the installation height of the attachment device 21, which can be achieved in particular by relocating the attachment bearing point 38 to the connection plane 65 or below it in the direction of the rotation plane 39, the kinematics of the boom 14 and the attachment device 21 are improved to the extent that a loading height and / or a breakout force can be increased. This is particularly the case when the attachment bearing point 38 is located in the rotation plane 39.

[0053] The attachment device 21 according to Figures 4 to 6 further has the advantage that the integration of the rotary drive 24 and the coupling 23 enables a reduction in the number of hydraulic connections for controlling a work device 25. For example, the number of connections in the coupling 23 can be reduced from five to three. Two of the connections serve a primary function, namely an inlet and a return line for the working fluid, in particular hydraulic oil. The third connection is provided for a so-called leakage oil. The connection or integration of the coupling 23 into the rotary drive 24 enables the hydraulic connections required for controlling the rotary drive to be provided within the rotary drive 24 and / or the coupling 23 and to be permanently connected to one another.Figure 7 shows a perspective view of the handle 14 according to Figure 3 and the attachment device 21 according to Figure 4, which is articulated thereto. The fork-shaped connection 20 is provided between the pivoting kinematics 27 and the attachment device 21. The pivoting kinematics 27 comprises two deflectors 28, each positioned towards an outer side of the handle section 51 and mounted in the deflector axis 29. Opposite each other, these deflectors 28 engage the pivot axis 35 of the pivoting kinematics 27. The coupling 31 of the pivoting kinematics 27 is fork-shaped. The coupling 31 has two coupling arms 64 pointing towards the attachment device 21. These coupling arms 64 preferably each engage an outer side of the cheek 36 of the coupling device 33. The respective ends of the coupling arms 64 are pivotally mounted on the coupling bearing point 37, preferably by a bolt. Opposite the coupling arms 64, the coupling 31 comprises, for example, a coupling stem 65.This coupling rod 65 is narrower in width than the distance between the two coupling arms 64. The coupling rod 65 can comprise a recess so that a piston rod of the pressure cylinder 16 can be positioned therebetween and engages the pivot axis 35.

[0054] The height HK of the coupling bearing point 37 and the mounting bearing point 38 of the coupling device 33 advantageously corresponds to the height HS of the offset stem section 51, which is formed by the distance between the mounting axis 17 and the deflector axis 29. The offset stem section 51 is positioned between the cheeks 36. The mounting axis 17 of the offset stem section 51 is aligned with the mounting bearing point 38, so that they are pivotally connected to each other by a bearing pin.

[0055] In this embodiment, the deflectors 28 are, for example, straight. This allows for higher forces to be absorbed. This embodiment is preferably used in compact excavators or medium-sized or large excavators. In the embodiment shown in Figs. 8 and 9, the deflectors 28 are C-shaped or curved. This embodiment is preferably used in mini-excavators.

[0056] Figure 8 shows a schematic side view of the handle 14 with the attachment device 21 in a first pivoting or working position. Figure 9 shows the handle 14 with the attachment device 21 in a further pivoting or working position, different from the arrangement in Figure 7.

[0057] The handle 14 with the offset handle section 51 enables the attachment device 21 to be pivoted relative to the fictitious straight line 53 at a pivot angle A of up to 60° toward the underside 43 of the handle 14. Due to the offset mounting bearing point 38 relative to the coupling bearing point 37 and the offset handle section 51, the rotating device 22 can be positioned with respect to its rotation axis almost parallel or parallel to the fictitious straight line 52.

[0058] Figure 9 shows the further pivoting position of the attachment device 21 in the opposite direction to that in Figure 8. A pivoting angle B of up to 160° can be assumed relative to the imaginary straight line 53 through the deflector axis 29. This pivoting position can be assumed by the offset stem section 51. This results in a pivoting angle of up to 220° between the attachment device 21 and the offset stem section 51.

[0059] Figure 10 shows an alternative embodiment of the handle 14. The handle section 51 is not offset relative to the main handle section 50. Such a handle 14 is referred to as a straight handle. It is provided that an upper and / or lower side of the handle section 51 and the main handle section 50 lie in a common plane. Otherwise, the statements regarding the aforementioned handle 14 apply. Figure 11 shows a perspective view of the handle 14 according to Figure 10 and the attachment device 21 according to Figure 4. The control of a pivoting movement of the attachment device 21 relative to the handle 14 is effected by a pivoting kinematics 27, which corresponds to the embodiment according to Figure 7. A fork-shaped coupling 31 is used. Thus, this embodiment comprises a fork-shaped connection 20 between the pivoting kinematics 27 and the attachment device 21.

[0060] Figure 12 shows an alternative embodiment of the handle 14 according to Figures 2 and 3. The handle 14 has a cranked handle section 51 relative to the main handle section 50. In contrast to the embodiment according to Figures 2 and 3, the cranked handle section 51 according to Figure 12 is fork-shaped. The cranked handle section 51 comprises two fork arms 61 that are spaced apart from one another. The deflector axis 29 and the attachment axis 17 are provided in each fork arm 61. Preferably, the distance between the fork arms 61 in the area where the deflector axis 29 is provided is smaller than in the section facing the free handle end 48, in which the attachment axis 17 is located. This has the advantage that the conditions for connecting the attachment device 21 to the handle 14 are analogous or the same as in the embodiment according to the handle in Figures 2 and 3 and in Figure 9.

[0061] Figure 13 shows a perspective view of the stem 14 according to Figure 12 with the attachment device 21 according to Figure 4 in a pivoted position. The fork-shaped connection 20 is formed between the stem 14 and the attachment device 21. In this embodiment, the pivoting kinematics 27 has a coupling 31, which is, for example, rod-shaped. Alternatively, it can also be provided that in this embodiment according to Figure 12, the coupling 31 can also be designed as a fork-shaped coupling 31 with two coupling arms 64. Preferably, the coupling 31 can be designed as a welded construction in which two rod-shaped sheets are connected to a web, preferably also made of sheet metal, wherein the rod-shaped sheets engage both the pivot axis 35 and the coupling bearing point 37. Alternatively, the welded construction can also be designed as a cast construction.

[0062] Figure 14 shows an alternative embodiment of the handle 15 to Figure 11. This embodiment differs from that in Figure 11 in that the handle section 51 is formed straight relative to the main handle section 50. A bend in the handle section 51 is not provided. Otherwise, the comments on Figure 12 apply.

[0063] Figure 15 shows a perspective view of the handle 14 shown in Figure 14 and the attachment device 21 shown in Figure 4 in a working position. In this embodiment, the pivoting kinematics 27 are designed analogously to that shown in Figure 12. Likewise, a fork-shaped coupling 31 can be provided as an alternative.

Claims

Claims Stick for an excavator, with a stick section (51) provided at the stick end (48), which is provided on a stick main section (50), with an attachment axis (17) provided at a stick end (48) of the stick section (51), on which an attachment device (21) with an attachment bearing point (38) of a coupling device (33) is pivotally mounted about the attachment axis (17), with a deflector axis (29) provided adjacent to the attachment axis (17) at the stick end (48), with a pivoting kinematics (27) which comprises a pivot axis (35) on which a deflector (28) and a coupler (31) are jointly mounted, wherein the deflector (28) engages the deflector axis (29) opposite the pivot axis (35) and the coupler (31) engages a coupling bearing point (37) of the coupling device (33) opposite, characterized in thatthat a fork-shaped connection (20) is provided between the stem (14) and the attachment device (21) and / or between the pivoting kinematics (27) and the attachment device (21). The stem according to claim 1, characterized in that a distance (HB) of the attachment bearing point (38) of the coupling device (33) to a front side or a slope (69) of the attachment device (21) and / or a distance (HA) of the coupling bearing point (37) of the coupling device (33) to a cover surface (67) of the attachment device (21) is a distance equal to or less than a factor of 2.5 of a diameter of a bearing pin of the attachment bearing point (38), and / or the coupling bearing point (37) of the coupling device (33). Handle according to claim 1 or 2, characterized in that the fork-shaped connection (20) between the handle (14) and the attachment device (21) is formed by a fork-shaped handle section (51) pointing towards the handle end (48), which comprises two fork arms (61) arranged at a distance from one another. Handle according to claim 3, characterized in that the attachment axis (17) and the deflector axis (29) are provided in the fork arms (61) of the fork-shaped handle section (51). Handle according to claim 3 or 4, characterized in that the fork-shaped handle section (51) is straight or offset relative to the main handle section (50).Handle according to one of claims 3 to 5, characterized in that a deflector (28) is mounted on an inner side of each of the fork arms (61) on the deflector axis (29), and that the coupling (31) is rod-shaped and preferably between two cheeks (36) of the coupling device (33). Handle according to claim 1, characterized in that the fork-shaped arrangement (20) between the pivoting kinematics (27) and the attachment device (21) comprises a fork-shaped coupling (31) with two coupling arms (64, 65) which are articulated to the coupling device (33). Handle according to claim 7, characterized in that the fork-shaped coupling (31) engages with each coupling arm (64, 65) on an outer side or inner side of the cheek (36) of the coupling device (33). Handle according to claim 7 or 8, characterized in that the handle section (51) is designed as a fork-free handle section. and on each outer side of the fork-free handle section (51), a deflector (28) is mounted on the deflector axis (29), and on each outer side of the coupling (31), the deflectors (28) are mounted on the pivot axis (35). Handle according to claim 9, characterized in that the fork-free handle section (51) is straight or offset relative to the main handle section (50). Handle according to one of the preceding claims, characterized in that the coupling device (33) is articulated to an attachment bearing point (38) on the attachment axis (17) of the handle section (51) and a coupling bearing point (37) is provided on the coupling device (33), on which a coupling (31) of the pivoting kinematics (27) engages and the attachment bearing point (38) is arranged offset relative to the coupling bearing point (37) in the direction of a rotation plane (39) of a rotating device (22) of the attachment device (21).Handle according to claim 11, characterized in that the attachment bearing point (38) is arranged offset from one another by a height (HK) relative to the coupling bearing point (37). Handle according to one of claims 11 or 12, characterized in that the attachment bearing point (38) and the coupling bearing point (37) are arranged at an angle (ß) to a rotation plane (39) of the rotating device (22) or parallel to the rotation plane (39) of the rotating device (22), which angle is formed by two fictitious straight lines (56, 57), wherein one fictitious straight line (56) extends through the coupling bearing point (37) and the attachment bearing point (38) and the other fictitious straight line (57) lies in the rotation plane (39) or is aligned parallel thereto and extends through the attachment bearing point (38). Handle according to claim 13, characterized in that the fictitious straight lines (56, 57) are arranged at an angle (ß) of 15° to 45°, preferably 25° to 35°. Handle according to one of the preceding claims, characterized in that the cranked handle section (51) is arranged at an angle (α) to a bottom side (43) of the handle main section (50), and the angle (α) is determined by two fictitious straight lines (52, 53), wherein one fictitious straight line (52) extends through the attachment axis (17) and the deflector axis (29) and the other fictitious straight line (53) extends through the deflector axis (29) and is aligned parallel to the bottom side (43) of the handle main section (50) or extends through the deflector axis (29) and the bearing point (41). Handle according to claim 15, characterized in that the cranked handle section (51) is cranked upwards at an angle (α) of 15° to 45°, preferably 25° to 35°, relative to the underside (43) or the upper side (45) of the main handle section (50).Handle according to one of claims 15 or 16, characterized in that the attachment axis (17) in the offset handle section (51) is arranged at a distance (HS) from the deflector axis (29), and preferably the attachment axis (17) lies above the upper side (45) of the main handle section (50). Handle according to one of claims 11 to 17, characterized in that the height (HK) between the coupling bearing point (37) and the attachment bearing point (38) corresponds to the height (HS) between the attachment axis (17) and the deflector axis (29) of the offset handle section (51). Handle according to one of claims 13 to 18, characterized in that the angular range of the fictitious straight lines (56, 57) of the attachment device (21) and the angular range of the fictitious straight lines (52, 53) on the offset handle section (51) are the same. Handle according to one of the preceding claims, characterized in that the deflector axis (29) in the transition region between. between the main stem section (50) and the offset stem section (51), or that the deflector axis (29) is provided in the offset stem section (51). A stem according to one of the preceding claims, characterized in that the offset stem section (51) has a length of less than 20% of the total length of the stem (14).

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