EP4409074B1 - Auslegeranordnung - Google Patents

Auslegeranordnung

Info

Publication number
EP4409074B1
EP4409074B1 EP22800389.3A EP22800389A EP4409074B1 EP 4409074 B1 EP4409074 B1 EP 4409074B1 EP 22800389 A EP22800389 A EP 22800389A EP 4409074 B1 EP4409074 B1 EP 4409074B1
Authority
EP
European Patent Office
Prior art keywords
boom
mount
legs
actuator
bifurcated portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22800389.3A
Other languages
English (en)
French (fr)
Other versions
EP4409074C0 (de
EP4409074A1 (de
Inventor
Paul KEMBLE
Andrew Richard CAWDERY
Corey Lee Gorman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
Original Assignee
Caterpillar Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Inc filed Critical Caterpillar Inc
Publication of EP4409074A1 publication Critical patent/EP4409074A1/de
Application granted granted Critical
Publication of EP4409074C0 publication Critical patent/EP4409074C0/de
Publication of EP4409074B1 publication Critical patent/EP4409074B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/14—Booms only for booms with cable suspension arrangements; Cable suspensions

Definitions

  • the present disclosure relates to a machine comprising a boom and actuators for controlling the boom.
  • the present disclosure relates to a boom assembly.
  • Machines such as excavators, mini-excavators, backhoes, and the like, may comprise a boom which is attached to the machine chassis at a pivot point.
  • Linear actuators typically hydraulic linear actuators, are connected between the boom and the chassis in order to control the boom position.
  • US 3,902,295 A discloses an excavator boom for an excavator.
  • the boom is pivotably connected to the chassis at a pivot point.
  • a pair of linear hydraulic actuators are pivotably each connected to an apex of the boom on opposing sides of the boom.
  • the boom of US 3,902,295 A is located between the pair of hydraulic linear actuators.
  • US 3,376,984 A discloses a typical arrangement for a boom and a pair of hydraulic linear actuators for a backhoe.
  • the boom is pivotably connected to a chassis at a pivot point.
  • a pair of hydraulic linear actuators are connected between the chassis and the boom at either end of the pivot.
  • the boom of US 3,376,984 A is located between the pair of hydraulic linear actuators.
  • US 4,074,821 B discloses an arrangement for a backhoe wherein the boom comprises a pair of transversely spaced apart boom sections, each boom section pivotably connected to the chassis. A single boom hydraulic linear actuator is then mounted between the boom sections.
  • the present disclosure seeks to provide an improved boom assembly, or at least a commercially useful alternative thereto.
  • JP 2008 045329 A discloses a construction machinery comprising a boom.
  • JP 2012 140833 A discloses a working machine capable of swinging against excavation reaction force while restraining increases in a weight and a manufacturing cost.
  • CN 210946934 U discloses an excavator and three-hinge-point backhoe movable arm thereof.
  • CN 202718153 U discloses a moveable arm of excavator
  • DE 10 2006 004207 A discloses an arm for an excavator having a main part and two side pieces which are connected with the main part. Each of two side parts has a fastening element with which the arm is connected to the excavator.
  • a boom assembly for a machine according to claim 1 is provided.
  • the boom assembly of the first aspect provides a boom having a bifurcated portion.
  • the bifurcated portion provides space for the linear actuator to be mounted to the boom and mount. Mounting the linear actuator between the two legs of the bifurcated portion of the boom reduces the torsional forces acting on the boom with respect to mounting the linear actuator at one side of a non-bifurcated boom.
  • the bifurcation in the boom may also allow the linear actuator to move between the two legs of the boom during movement of the boom.
  • the bifurcated portion of the boom may be configured to allow the actuator to pass between the two legs during at least a portion of the movement arc of the boom as it pivots about the mount.
  • the boom assembly of the first aspect may provide for an increased movement arc of the boom with respect to the mount.
  • the linear actuator is an electromechanical linear actuator.
  • the bifurcated portion of the boom defines a region in which the packaging for the linear actuator may extend/be located during the movement range of the boom assembly (i.e. as the boom is raised or lowered with respect to the mount).
  • the packaging of the linear actuator may be relatively large in diameter relative to the actuated piston rod.
  • the bifurcated portion of the boom may define a region to accommodate the increased packaging size of an electromechanical linear actuator throughout the range of motion of the boom assembly.
  • the mount may be provided as a chassis, or at least part of a chassis.
  • the chassis may form part of a machine and the like. That is to say, in some embodiments the boom and the linear actuator may each be pivotably connected to a chassis of a machine.
  • the mount may provide an intermediate connection between the boom and a chassis. Similarly the mount may provide an intermediate connection between the linear actuator and the chassis.
  • a machine is provided.
  • the machine of the second aspect may incorporate the boom assembly of the first aspect.
  • the machine of the second aspect may be an excavator, a mini-excavator, a backhoe and the like.
  • the first and second embodiments in figures 1 to 8 are embodiments of the present invention pursuant to independent claim 1.
  • the third to sixth embodiments shown in figures 9 to 19 are not within the scope of the presently claimed invention as they include an actuator attachment point 50 provided outside of a region between legs 27, 28 of a bifurcated potion.
  • a boom assembly 10 is provided. According to embodiments of this disclosure, the boom assembly 10 may be provided as part of a machine.
  • Fig. 1 shows a diagram of an excavator 1 comprising a boom assembly 10 according to a first embodiment of the disclosure.
  • the boom assembly 10 comprises a mount 12, a boom 14, and an actuator 16.
  • the mount 12 is provided by the chassis of the excavator 1.
  • Fig. 1 shows an isometric front view of the excavator 1
  • Fig. 2 shows an isometric rear view of the excavator 1.
  • Fig. 3 shows a side view of the excavator 1
  • Fig. 4 shows a front view of the excavator 1.
  • Fig. 5 shows a detailed view of the boom 14 of the first embodiment.
  • the boom 14 of the excavator 1 has an upper end 20 and a lower end 22.
  • the boom 14 of Fig. 5 may have an upper section 21 extending from the upper end 20 to an elbow section 30.
  • the boom 14 may also have a lower section 23 extending from the elbow section 30 to the lower end 22.
  • the lower section 23 may extend from the lower end 22 in a generally linear manner (i.e. along an axis) towards the elbow section 30.
  • the upper section 21 may extend from the upper end 20 in a generally linear manner towards the elbow section 30.
  • the elbow section 30 of the boom 14 may define a bend of the boom 14 such that an obtuse angle of the boom is defined between the upper and lower sections of the boom 21, 23.
  • the boom 14 of Fig. 5 may have a similar obtuse angled shape to booms known in the art.
  • the upper end 20 of the boom 14 is configured to be connected to an arm 18.
  • the upper end 20 is connected to the arm 18 by a pivotable connection.
  • the arm 18 may provide an attachment point 19 for a work tool (not shown) at an opposing end of the arm 18 to the pivotable connection to the boom 14.
  • the work tool may, for example be a bucket or the like.
  • the rotational position of the arm 18 relative to the boom 14 may be controlled by an arm actuator 40.
  • the arm actuator 40 may be connected between the arm 18 and the boom 14.
  • the arm actuator 40 may be a linear actuator of a similar type to the linear actuator 16 of the boom assembly 10.
  • the lower end 22 of the boom 14 is pivotably connected to the mount 12 at a mount-boom pivot 24.
  • the boom 14 is configured to rotate about the mount-boom pivot 24.
  • the mount-boom pivot 24 may extend along a first axis such that the boom rotates in a plane orthogonal to the first axis.
  • the first axis may extend in a generally horizontal direction such that the boom 14 rotates about the mount-boom pivot 24 in a generally vertical plane.
  • the boom 14 comprises a bifurcated portion 26.
  • the bifurcated portion 26 extends between the lower end 22 of the boom14 and the upper end 20 of the boom.
  • the bifurcated portion 26 also extends between the lower end of the boom 14 and an actuator attachment point 50.
  • the bifurcated portion 26 may extend along the boom 14 from the lower end 22 towards the upper end of the boom 14 beyond the actuator attachment point 50.
  • the bifurcated portion 26 comprises two legs 27, 28. As shown in Fig. 4 , each leg 27, 28 extends from the lower end of the boom 22. As such, an end of each leg 27, 28 is pivotably connected to the mount 12.
  • the two legs 27, 28 are spaced apart to define a void region between the two legs 27, 28.
  • the void region between the two legs 27, 28 may be provided to accommodate at least a portion of the linear actuator 16 during at least a portion of the movement arc of the boom assembly 10. That is to say, the linear actuator 16 may move between the two legs 27, 28 as the boom 14 rotates about the mount-boom pivot 24.
  • the two legs 27, 28 of the boom 14 join together.
  • the bifurcated portion 26 may extend only partially along the length of the boom.
  • the two legs 27, 28 join together at the elbow portion 30 of the boom.
  • the boom 14 including the bifurcated portion 26 defines a fork shape. That is to say, the boom 14 has a forked lower end comprising two legs 26, 27.
  • an external width of the bifurcated portion 26 of the boom in a direction of the axis of rotation of the boom is greater than a width of the upper end 20 of the boom 14 in the direction of the axis of rotation of the boom 14. That is to say, the legs 27, 28 of the boom 14 are spaced apart such that they are wider (in a direction of the axis of rotation of the boom, which is a horizontal direction in Fig. 4 ) than the upper end of the boom 20. As shown in Fig. 4 , the boom 14 widens at the elbow section 30 to accommodate the change in width of the boom. By widening the bifurcated section 26 of the boom 14, the legs 27, 28 may be provided with increased width, thereby increasing their torsional stiffness, whilst also providing a suitably wide void to accommodate the linear actuator 16.
  • Fig. 5 shows a partial cross-section through one of the legs 27 to show the internal structure of the leg 27.
  • each leg 27, 28 of the bifurcated portion 26 may be formed from a box section.
  • the box section structure of each leg 27, 28 extends along a length of the boom 14 between the lower end 22 and the elbow section 30.
  • the box section of each leg 27, 28 provides torsional stiffness for the boom 14.
  • the boom 14 also includes the actuator attachment point 50.
  • the actuator attachment point 50 provides point on the boom 14 where the linear actuator 16 is pivotably connected to the boom 14.
  • Fig. 6 provides a detailed view of the first embodiment showing the linear actuator 16 pivotably connected to the boom 14 at the actuator attachment point 50.
  • the two legs 27, 28 of the bifurcated portion 26 may extend along the boom at least: 50, 60, 70, or 80 % of the distance along the boom 14 between the mount-boom pivot 24 at the lower end of the boom 22 and the actuator attachment point 50.
  • the bifurcated portion 26 may extend along all of the distance between the mount-boom pivot 24 at the lower end of the boom 22 and the actuator attachment point 50, for example as shown in Fig. 1 .
  • the actuator attachment point 50 is located between the legs 27, 28 of the bifurcated portion 26, for example as shown in Figs. 2 , 4 , and 6 of the first embodiment.
  • the actuator attachment point 50 may be provided in other locations of the boom 14.
  • the linear actuator 16 is provided to control/drive the rotational position of the boom 14 relative to the mount 12. Accordingly, a first end 60 of the linear actuator 16 is pivotably connected to the mount 12 about a mount-actuator pivot 25. At an opposite end of the linear actuator 16, a second end 62 is pivotably connected to the boom 14 at the actuator attachment point 50.
  • the linear actuator 16 is configured to provide a motive force in a linear direction in order to drive the rotational position of the boom 14.
  • the linear actuator 16 is an electromechanical linear actuator.
  • the linear actuator is an electromechanical linear actuator.
  • a hydraulic linear actuator would also be suitable.
  • the electromechanical linear actuator shown in Fig. 1 comprises a housing 64.
  • the housing 64 houses the power electronics and motor used to generate the linear motion of the linear actuator 16. While the shape and size of the housing 64 depends on the design of the specific linear actuator 16, it will be appreciated that hydraulic linear actuators do not have the same housing requirements. That is to say, the hydraulic fluid pump used to drive a hydraulic linear actuator can be housed at a remote location away from the boom 14.
  • the boom assembly 10 shown in Fig. 1 can accommodate the housing 64 of the electromechanical linear actuator through the provision of the void between the legs 27, 28 of the bifurcated portion 26
  • the first embodiment only one linear actuator 16 may be connected between the mount 12 and the boom 14 in order to control/drive the rotational position of the boom 14 relative to the mount 12.
  • the first embodiment provides a boom assembly 10 which can be driven by a single linear actuator 16, rather than a plurality of linear actuators. By mounting the linear actuator 16 in a plane extending between the legs 27, 28, the boom 14 has improved torsional rigidity.
  • the linear actuator 16 is pivotably connected between the mount 12 and boom 14 in a plane normal to an axis of rotation of the boom about the mount-actuator pivot 25, wherein the plane extends between the two legs of the of the boom. As shown in Fig. 1 , at least a portion of the linear actuator 16 extends between the legs 26, 27 of the boom in the void provided by the bifurcated portion 26. Such a bifurcated portion allows a linear actuator 16 to be accommodated by the boom 14 in a generally central position (between the legs 27, 28) whilst allowing the boom 14 to maintain a full range of rotational movement.
  • the mount-actuator pivot 25 may be provided below the mount-boom pivot 24. As such, when the linear actuator 16 is contracted, the upper end of the boom 20 is lowered relative to the mount 12. In other embodiments, the relative positions of the mount-boom pivot 24 and the mount-actuator pivot 25 may be different.
  • a stiffening member 70 may be provided between the two legs 27, 28 of the bifurcated portion 26 to partially close a region of the bifurcated portion 26 between the two legs towards the lower end of the boom 22.
  • the lower section 23 of the boom 14 may have a whistle shape, wherein the bifurcated section 26 provides an opening between the two legs 27, 28 to accommodate the linear actuator.
  • the stiffening member 70 is provided on a top surface of the legs 27, 28 to provide additional torsional stiffness to the legs 27, 28. As shown in Fig. 4 , the box sections of the legs 27, 28 extend between the elbow section 30 and the lower end 22 of the boom below the stiffening member 70.
  • the stiffening member 70 may close the bifurcated portion 26 along at least 20 % of the length of the bifurcated portion in order to provide a suitable stiffening effect.
  • the stiffening member may close the bifurcated portion along no more than 80 % of the length of the bifurcated portion 26 in order to provide a suitable space to accommodate the linear actuator 16.
  • the stiffening member 70 may comprise a plate. As such, the stiffening member 70 comprises a plate which extends across the void region of the bifurcated portion 26 between the two legs 27, 28. In other embodiments, the stiffening member 70 may comprise other forms/shapes. For example, in some embodiments, the stiffening member 70 may comprise a tube, or box section, running axially, between the legs 27, 28 (i.e. a central axis of the tube extends in a generally transverse direction to the legs 27, 28).
  • an excavator 2 is provided.
  • the excavator 2 is similar to the excavator of the first embodiment in that it comprises a boom assembly 10.
  • Fig. 7 shows a rear isometric view of the excavator 2 of the second embodiment.
  • Fig. 8 shows a front isometric view of the excavator 2 of the second embodiment.
  • the boom assembly 10 of the second embodiment has a generally similar construction to the first embodiment.
  • the boom assembly of the second embodiment does not include a stiffening member 70 that partially closes a region of the bifurcated portion.
  • each of the two legs 27, 28 of the bifurcated portion extend from the elbow section 30 to the lower end of the boom 30 in a fork shape.
  • an excavator 3 is provided.
  • the excavator 3 is different to the first and second embodiment in that the boom assembly 10 may comprise a hydraulic linear actuator 80 to drive the boom 14.
  • Fig. 9 shows a front isometric view of the excavator 3.
  • Fig. 10 shows a detailed view of the boom 14.
  • Fig. 11 shows a detailed view of the boom 14 and the mount (chassis) 12 of the excavator 3.
  • the mount-actuator pivot 25 is provided above the mount-boom pivot 24. That is to say, at the mount 12 the linear actuator 80 is connected above the boom 14. Consequently, lowering the upper end of the boom 20 causes the linear actuator 80 to extend.
  • boom assemblies 10 according to embodiments of this disclosure may be provided with different arrangements of the mount-boom pivot 24 and the mount-actuator pivot 25. The relative arrangement of the mount-boom pivot 24 and the mount-actuator pivot 25 is shown in Fig. 9 .
  • the position of the actuator attachment point 50 may also be varied according to embodiments of the disclosure.
  • the actuator attachment point 50 may be provided outside of the region between the legs 27, 28 of the bifurcated potion.
  • the pivot connection between the linear actuator 80 and the actuator attachment point 50 is provided above, or on, an upper surface 81 of the boom 14.
  • the linear actuator 80 of the third embodiment is connected between the boom 14 and the mount 12 in a plane normal to an axis of rotation of the boom 14 about the mount-actuator pivot 25, wherein the plane extends between the two legs 27, 28 of the of the boom 14.
  • the boom assembly of the third embodiment can still accommodate the at least a portion of the linear actuator between the legs 27, 28 of the bifurcated portion 26 during at least a portion of its rotational movement.
  • Fig. 11 shows a detailed view of the actuator 80 connected between the mount 12 and the boom 14.
  • the actuator attachment point 50 of the third embodiment is offset towards the upper surface 81 of the boom assembly. That is to say, the actuator attachment point 50 may be provided at an axial point along the boom 14 (from the lower end 22 towards the upper end 20) between the two legs 27, 28 (i.e. at an axial point along the bifurcated portion 26). While the actuator attachment point 50 may be provided, axially, within the bifurcated portion 26, the actuator attachment point 50 may be located at a point that is not between the two legs 27, 28. For example, as shown in Figs. 10 and 11 , the actuator attachment point 50 is provided above an upper surface 81 of the two legs. A flange 82, or similar member, may be used to locate the actuator attachment point 50 in the desired location.
  • a mini-excavator 4 is provided.
  • Fig. 12 shows an isometric view of the mini-excavator 4 of the fourth embodiment.
  • Fig. 13 shows a side view of the mini-excavator 4 of the fourth embodiment.
  • Fig. 14 shows a detailed view of the boom assembly 10 of the mini-excavator 4 of the fourth embodiment.
  • Fig. 15 shows a detailed view of the boom 14 of the mini-excavator 4 of the fourth embodiment.
  • the boom assembly 10 of embodiments of this disclosure may be used on variety of machines.
  • the boom 14 of the fourth embodiment has a forked shape similar to the boom 14 of the second and third embodiments.
  • the boom 14 and actuator 16 of the fourth embodiment are mounted to the mount 12 in a similar arrangement to the third embodiment.
  • a mini-excavator 4 may be provided with a mounting arrangement similar to the first and second embodiments.
  • the boom 14 may also then be provided with a stiffening member similar to the first embodiment.
  • the mini-excavator 4 includes a mount 12 to which the boom 14 and the linear actuator 16 are connected which is not the chassis of the machine. Rather, in the mini-excavator 4 the mount 12 provides an intermediate part between the boom 14 and the chassis 90 of the mini-excavator 4.
  • the mount 12 of the mini-excavator may be configured to rotate the entire boom assembly 10 about a vertical axis relative to the chassis 90 of the mini-excavator 90.
  • the mini-excavator 4 shown in Figs. 12 , 13, and 14 is provided with an electromechanical linear actuator 16.
  • electromechanical linear actuator 16 As such, it will be appreciated that the boom assembly of this disclosure may also be used to accommodate electromechanical linear actuator of a variety of different sizes on a range of different sized machines.
  • Fig. 15 shows a detailed view of the boom 14 of the fourth embodiment. It will be appreciated from Figs. 14 and 15 that the actuator attachment point 50 is located on the elbow section 30 of the boom 14. As such, in the fourth embodiment the bifurcated portion 26 of the boom may not extend the entire axial distance to the actuator attachment point 50. It will be appreciated from the embodiments of the disclosure that the extent to which the bifurcated portion 26 extends along the boom 14 towards the actuator attachment point 50, and the location of the actuator attachment point 50 will depend on the size of the linear actuator 16 to be accommodated and the relative positions of the mount-boom pivot 24 and the mount-actuator pivot 25.
  • Fig. 16 shows a detailed view of a boom assembly according to a fifth embodiment of the disclosure.
  • a mini-excavator 5 is provided.
  • the mini-excavator 5 is similar to the mini-excavator of the fourth embodiment, wherein a hydraulic actuator 80 is provided in place of an electromechanical linear actuator.
  • the bifurcated portion 26 of the boom 14 may extend from the elbow section 30 to the lower end of the boom 14 such that two mount-boom pivot 24 connections are provided at the lower end 20, one for each leg 27, 28.
  • a boom assembly 10 may be provided in which the bifurcated portion 26 may not extend completely to the lower end 22 of the boom 14. That is to say, the two legs 27, 28 join together at a lower portion 29 of the boom 14.
  • An example of such a boom 14 is shown in Figs. 17 and 18 .
  • An excavator 6 according to the sixth embodiment is shown in Fig. 19 .
  • the excavator 6 may be provided with a boom assembly 10 according to the sixth embodiment.
  • the mount-boom pivot 24 may be provided above the mount-actuator pivot 25, similar to the first and second embodiments. It will be appreciated that the positions of the mount-boom and the mount-actuator pivot 25 may be reversed, similar to the third embodiment. Further, it will be appreciated that a mini-excavator may be provided with a boom assembly 10 having an O-shaped bifurcated portion 26.
  • the boom assembly of the present invention provides a boom having a bifurcated portion.
  • the bifurcated portion provides space for the linear actuator to be mounted to the boom and mount. Mounting the linear actuator between the two legs of the bifurcated portion of the boom reduces the torsional forces acting on the boom with respect to mounting the linear actuator at one side of a non-bifurcated boom.
  • the bifurcation in the boom may also allow the linear actuator to move between the two legs of the boom during movement of the boom.
  • the bifurcated portion of the boom may be configured to allow the actuator to pass between the two legs during at least a portion of the movement arc of the boom as it pivots about the mount.
  • the boom assembly of the first aspect may provide for an increased movement arc of the boom with respect to the mount.
  • the linear actuator is an electromechanical linear actuator.
  • the bifurcated portion of the boom defines a region in which the packaging for the linear actuator may extend/be located during the movement range of the boom assembly (i.e. as the boom is raised or lowered with respect to the mount).
  • the packaging of the linear actuator may be relatively large in diameter relative to the actuated piston rod.
  • the bifurcated portion of the boom may define a region to accommodate the increased packaging size of an electromechanical linear actuator throughout the range of motion of the boom assembly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Claims (11)

  1. Auslegeranordnung (10) für eine Maschine, wobei die Auslegeranordnung (10) eine Halterung (12), einen Ausleger (14) und einen elektromechanischen Linearaktor (16) umfasst,
    der Ausleger (14) umfassend:
    ein oberes Ende (20), das konfiguriert ist, um mit einem Arm (18) verbunden zu werden, wobei das obere Ende (20) des Auslegers (14) eine erste äußere Breite in Richtung der Drehachse des Auslegers (14) aufweist;
    einen Bogenabschnitt (30), der eine Biegung des Auslegers (14) definiert;
    ein unteres Ende (22), das um einen Halterungs-Ausleger-Drehpunkt (24) schwenkbar mit der Halterung (12) verbunden ist;
    einen gegabelten Abschnitt (26) des Auslegers (14), der zwei Schenkel (27, 28) umfasst, wobei sich der gegabelte Abschnitt (26) zwischen dem Aktorbefestigungspunkt (50) und dem unteren Ende (22) des Auslegers (14) erstreckt, wobei der gegabelte Abschnitt (26) des Auslegers (14) eine zweite äußere Breite in Richtung der Drehachse des Auslegers (14) aufweist, wobei die zweite äußere Breite des gegabelten Abschnitts (26) des Auslegers (14) größer ist als die erste Breite des oberen Endes (20) des Auslegers (14),
    wobei die beiden Schenkel (27, 28) des gegabelten Abschnitts (26) am Bogenabschnitt (30) des Auslegers (14) zusammenlaufen; und
    einen Aktorbefestigungspunkt (50), der sich zwischen den beiden Schenkeln (27, 28) des gegabelten Abschnitts (26) befindet; und
    der elektromechanische Linearaktor (16) umfassend:
    ein erstes Ende, das um einen Halterungs-Aktor-Drehpunkt (25) schwenkbar mit der Halterung (12) verbunden ist; und
    ein gegenüberliegendes zweites Ende, das schwenkbar mit dem Ausleger (14) am Aktorbefestigungspunkt (50) verbunden ist,
    wobei der elektromechanische Linearaktor (16) zwischen dem Ausleger (14) und der Halterung (12) in einer Ebene normal zu einer Drehachse des Auslegers (14) um den Halterungs-Ausleger-Drehpunkt (24) verbunden ist, wobei sich die Ebene zwischen den beiden Schenkeln des Auslegers (12) erstreckt.
  2. Auslegeranordnung (10) nach Anspruch 1, wobei
    der elektromechanische Linearaktor (16) zwischen der Halterung (12) und dem Ausleger (14) so verbunden ist, dass sich der elektromechanische Linearaktor (16) zwischen den beiden Schenkeln des gegabelten Abschnitts des Auslegers erstreckt.
  3. Auslegeranordnung (10) nach einem der vorstehenden Ansprüche, wobei
    der Halterungs-Aktor-Drehpunkt (25) unterhalb des Halterungs-Ausleger-Drehpunkts (24) bereitgestellt ist, sodass das Absenken des oberen Endes (20) des Auslegers (14) eine Kontraktion des elektromechanischen Linearaktors (16) bewirkt.
  4. Auslegeranordnung (10) nach Anspruch 1, wobei
    der Halterungs-Aktor-Drehpunkt (25) oberhalb des Halterungs-Ausleger-Drehpunkts (24) bereitgestellt ist, sodass das Absenken des oberen Endes (20) des Auslegers (14) ein Ausfahren des elektromechanischen Linearaktors (16) bewirkt.
  5. Auslegeranordnung (10) nach einem der vorstehenden Ansprüche, wobei
    sich die beiden Schenkel (27, 28) des gegabelten Abschnitts (26) des Auslegers (14) entlang des Auslegers über mindestens -50, 60, 70 oder 80 % der Entfernung entlang des Auslegers (14) zwischen dem Halterungs-Ausleger-Drehpunkt (24) und dem Aktorbefestigungspunkt (50) erstrecken.
  6. Auslegeranordnung (10) nach einem der vorstehenden Ansprüche, wobei
    ein Versteifungselement (70) zwischen den beiden Schenkeln (27, 28) bereitgestellt ist, um einen Bereich des gegabelten Abschnitts (26) zwischen den beiden Schenkeln (27, 28) in Richtung des unteren Endes des Auslegers (14) teilweise zu verschließen.
  7. Auslegeranordnung (10) nach einem der vorstehenden Ansprüche, wobei
    nur ein elektromechanischer Linearaktor (16), der konfiguriert ist, um die Drehposition des Auslegers (14) zu steuern, zwischen der Halterung (12) und dem Ausleger (14) verbunden ist.
  8. Auslegeranordnung (10) nach einem der vorstehenden Ansprüche, wobei
    jeder Schenkel (27, 28) des gegabelten Abschnitts (26) einen sich entlang des Auslegers (14) erstreckenden Kastenabschnitt umfasst.
  9. Auslegeranordnung (10) nach einem der vorstehenden Ansprüche, wobei
    sich die beiden Schenkel (27, 28) des gegabelten Abschnitts (26) des Auslegers (14) bis zum Halterungs-Ausleger-Drehpunkt (24) erstrecken, sodass jeder Schenkel (27, 28) schwenkbar mit der Halterung (12) verbunden ist.
  10. Auslegeranordnung (10) nach einem der Ansprüche 1 bis 8, wobei
    die beiden Schenkel (27, 28) des gegabelten Abschnitts (26) des Auslegers (14) an einem Punkt entlang des Auslegers (14) in Richtung des unteren Endes (22) so zusammenlaufen, dass das untere Ende (22) des Auslegers (14) durch eine einzige schwenkbare Verbindung schwenkbar mit dem Halterungs-Ausleger-Drehpunkt (24) verbunden ist.
  11. Maschine, umfassend die Auslegeranordnung (10) nach einem der Ansprüche 1 bis 10.
EP22800389.3A 2021-09-27 2022-09-26 Auslegeranordnung Active EP4409074B1 (de)

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GB2113745.0A GB2611078B (en) 2021-09-27 2021-09-27 Boom assembly
PCT/US2022/044662 WO2023049428A1 (en) 2021-09-27 2022-09-26 Boom assembly

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US3902295A (en) 1974-05-28 1975-09-02 Caterpillar Tractor Co Boom construction and method for making same
CA1030109A (en) * 1975-05-12 1978-04-25 Elton B. Long Overcenter backhoe
JPH06220884A (ja) * 1993-01-21 1994-08-09 Yanmar Diesel Engine Co Ltd バックホーのブーム構造
DE102006004207B4 (de) * 2006-01-30 2015-02-12 Lanz Baumaschinen Gmbh Gegabelter Ausleger für einen Bagger
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EP4409074A1 (de) 2024-08-07
GB2611078A (en) 2023-03-29
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