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EP4520871A1 - Excavateur - Google Patents

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Publication number
EP4520871A1
EP4520871A1 EP23195355.5A EP23195355A EP4520871A1 EP 4520871 A1 EP4520871 A1 EP 4520871A1 EP 23195355 A EP23195355 A EP 23195355A EP 4520871 A1 EP4520871 A1 EP 4520871A1
Authority
EP
European Patent Office
Prior art keywords
boom
cable
motor
movement
pivoting
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.)
Pending
Application number
EP23195355.5A
Other languages
German (de)
English (en)
Inventor
Maximilian Kelch
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.)
XCMG European Research Center GmbH
Original Assignee
XCMG European Research Center GmbH
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 XCMG European Research Center GmbH filed Critical XCMG European Research Center GmbH
Priority to EP23195355.5A priority Critical patent/EP4520871A1/fr
Publication of EP4520871A1 publication Critical patent/EP4520871A1/fr
Pending legal-status Critical Current

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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
    • E02F3/36—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
    • 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
    • E02F3/427—Drives for dippers, buckets, dipper-arms or bucket-arms with mechanical drives
    • 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
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor

Definitions

  • the invention relates to an excavator, preferably a wheeled excavator or a tracked excavator, comprising a frame, which is preferably formed by a mobile undercarriage and an uppercarriage arranged on the undercarriage so as to be rotatable about a rotation axis, and an equipment attached directly or indirectly to the frame, wherein the equipment is designed in multiple sections with a boom, a stick and a bucket, wherein the boom has a starting region and an end region and is attached to the frame with its starting region so as to be pivotable about at least one pivot axis within its pivot range in at least two directions of movement, wherein the stick further has a starting region and an end region and is attached to the end region of the boom so as to be pivotable about a pivot axis which is provided either at its starting region or spaced from its starting region in the direction of the end region, and wherein the bucket is attached to the end region of the stick so as to be pivotable about a pivot axis within its pivot range in
  • the moving parts of the equipment such as the boom, stick, and bucket, are typically driven by hydraulic cylinders.
  • the boom usually consists of a welded steel frame with individual joints, which are held in position or moved by hydraulic cylinders at specific points on other joints.
  • Excavators are also known in which the movement of the moving elements of the equipment such as the boom, stick and bucket is effected by cables.
  • a second cable pull is therefore required for a second direction of movement, the force of which opposes that of the first cable pull.
  • Another disadvantage is that the respective cable guides can sometimes significantly restrict the excavator's working space.
  • the object of the invention is to avoid the aforementioned disadvantages and to provide an excavator which is hydraulic-free and can be used without a significant restriction of the working space.
  • the equipment of the excavator according to the invention can be very similar to, or even identical to, the equipment of a conventional hydraulic excavator, whereby the excavator according to the invention can be used in a similar or identical manner to a conventional hydraulic excavator and is similar or even identical in terms of reach, installation space, and the accessible working area.
  • the cable hoists, whose drive does not require hydraulics, make it possible to do without hydraulics.
  • a first motor for the first direction of movement and a second motor for the second direction of movement can be provided.
  • the axis of the pulley provided on the arm may be in line with the pivot axis of the bucket, thus ensuring a simplified assembly of the equipment.
  • first pivot point for pivoting the bucket and the second pivot point for pivoting the bucket can be designed as a single pivot point for pivoting the bucket in both directions. This design eliminates the need for additional components and simplifies the equipment design.
  • At least one motor can be designed as an electric motor, and preferably several motors can each be designed as electric motors, and very preferably all motors can each be designed as electric motors.
  • Electric motors offer the advantage of high achievable torques even at low speeds. Furthermore, they are low-maintenance and require only a small installation space. It is particularly advantageous that an excavator with only electric motors can be operated entirely electrically and therefore does not require a hydraulic system. In this respect, such excavators can also be used in situations with increased safety requirements with regard to the possible leakage of harmful substances, such as hydraulic fluid or diesel.
  • the pulley of the cable pulley for pivoting the boom in its second direction of movement can be arranged on the uppercarriage.
  • Such a configuration allows the pivoting of the boom in its second direction of movement to be implemented by the cable pulley without simultaneously impeding relative movements between the uppercarriage and undercarriage of the excavator. In this respect, a rotational movement of the uppercarriage around its axis of rotation relative to the undercarriage is still possible.
  • the cable pulley for pivoting the boom in its second direction of movement can be provided on the underside of the boom between the boom's initial area and the second force pivot point. Such a configuration allows the cable pulley to pivot the boom in its second direction of movement without simultaneously changing the distance between this pulley and the second force pivot point.
  • the boom can have a curved shape or an obtuse angle.
  • a shape essentially corresponding to a boomerang is conceivable.
  • the boom has, for example, an "L" shape with two legs of approximately equal length, arranged at an angle, preferably greater than 90°, to each other.
  • the legs can be thicker where they meet, with the two legs tapering from there.
  • this curved shape or obtuse angle also continues into the stick.
  • Such a design allows one of the buckets to be positioned more flexibly and achieves an improved bucket reach.
  • At least one cable can be routed through a hollow space in the boom, and preferably also over a pulley. This protects the cable from external influences, such as contamination. Furthermore, accidental contact of the cable with other equipment elements, such as the bucket, or other objects in the excavator's vicinity can be avoided. Furthermore, routing the cable through the boom ensures that the excavator's working space is not restricted.
  • At least one cable can be routed through a hollow space in the boom, and preferably also via a pulley. This protects the cable from external influences, such as dirt. Furthermore, accidental contact of the cable with other equipment elements or other objects in the excavator's vicinity can be avoided. Furthermore, routing the cable through the boom ensures that the excavator's working space is not restricted.
  • the arrangement of the motor, power linkage point and, if applicable, deflection pulley can be selected in such a way that, over the entire pivoting range of the boom, the cable pull in its area between the motor and power linkage point or deflection pulley and the power linkage point is no more than 20% of the distance between the boom pivot axis and the stick pivot axis from the part of the boom to which it runs approximately parallel in this area.
  • This arrangement can ensure that the excavator's working space is only slightly restricted. Furthermore, accidental contact of the cable winch with other elements of the equipment or other objects in the excavator's vicinity can be avoided.
  • the arrangement of the motor, power linkage point, and possibly the deflection pulley can be selected such that, across the entire pivoting range of the boom, the cable pull in its area between the motor and power linkage point or deflection pulley and power linkage point is no more than 20% of the distance between the pivot axis of the boom and the pivot axis of the bucket from that part of the boom to which it runs approximately parallel in this area.
  • Such an arrangement can ensure that the working space of the excavator is only slightly restricted.
  • accidental contact of the cable pull with other elements of the equipment or other objects in the vicinity of the excavator can be avoided.
  • At least one cable pulley can be guided over a pulley arranged on a spacer on the boom or stick, with the pulley either pushing the cable pulley away from the boom or stick or pulling it toward the boom or stick.
  • the necessary angles in the cable pulley guide can be achieved to achieve the desired leverage, with the working space of the excavator being only slightly restricted by the cable pulley.
  • the two cable pulleys for the two directions of movement of the boom and/or the two cable pulleys for the two directions of movement of the stick and/or the two cable pulleys for the two directions of movement of the bucket can each be designed completely independently of one another with separate and independently controllable motors.
  • the boom and/or the stick and/or the bucket can be moved in any of their directions of movement, whereby the boom, stick or bucket is simultaneously prevented from unintentionally pivoting in both directions.
  • one motor for the cable pull is driven for one direction of movement of the respective element, and to pivot the respective element in the other direction of movement, the other motor for the cable pull is driven for the other direction of movement of the respective element. While one motor is reeling in the cable pull assigned to it, it is necessary for the other motor to release the cable pull assigned to it. In this respect, it is possible to keep the cables of the respective element of the equipment taut to prevent pivoting in both directions of movement.
  • the two cable pulls for the two directions of movement of the boom and/or the two cable pulls for the two directions of movement of the stick and/or the two cable pulls for the two directions of movement of the bucket can each be designed independently of one another with a single motor driving two different cam disks for the two cable pulls, wherein the shape of the two cam disks is each adapted to the geometric relationships of the boom, stick or bucket, the arrangement of the cam disks and the position of the force articulation points.
  • the cable pull for one direction of movement of the associated element i.e.
  • the boom, stick or bucket can be output and simultaneously the cable pull for the other direction of movement of the associated element, i.e. the boom, stick or bucket, can be retracted.
  • the motor of the respective element is driven in one direction of rotation, and to pivot the respective element in the other direction of movement, the motor of the respective element is driven in the other direction of rotation. It is therefore possible to keep the cables of the respective element of the equipment taut with respect to pivoting in both directions of movement.
  • the boom can be mounted on the frame with its initial section pivotable about two different pivot axes, each power-operated within its pivot range in at least two directions of movement, with one pivot axis oriented horizontally and the other vertically.
  • the boom can be mounted on the frame with its initial section pivotable about two different pivot axes, each power-operated within its pivot range in at least two directions of movement, with one pivot axis oriented horizontally and the other vertically.
  • lateral pivoting is also possible via the vertically oriented pivot axis.
  • Fig. 1 shows an excavator 1 designed as a tracked excavator, comprising a mobile undercarriage 2 and an uppercarriage 3 arranged thereon so as to rotate about a pivot axis.
  • Attached to the uppercarriage 3 is an attachment 5 pivotable about a pivot axis 4.
  • the attachment 5 is designed in multiple sections and includes a boom 6, a stick 7, and a bucket 8.
  • the boom 6 has a curved shape.
  • the pivot axis 4 is provided on a superstructure frame 38 arranged on the uppercarriage 3.
  • the boom 6 has a starting area and an end area, wherein its starting area is attached to the pivot axis 4 and can be pivoted by power in two directions of movement within its pivoting area.
  • the stem 7 also has a starting region and an end region.
  • the stem 7 is mounted on the end region of the boom 6 in a power-operated manner about a pivot axis 48, allowing it to pivot in two directions of movement within its pivoting range.
  • the pivot axis 48 is spaced from the starting region of the stem 7 in the direction of the end region.
  • the bucket 8 is mounted on the end region of the arm 7 in a power-operated manner about a pivot axis 49 in two directions of movement of its pivoting range.
  • a first drive 9 (not shown) is provided with a motor 10 (not shown) provided on the superstructure frame 38, and thus indirectly on the superstructure 3, and with a first cable 11 driven by the motor.
  • This first cable 11 runs from this motor 10 (not shown) to a first power linkage point 12 provided on the boom 6 at a distance from the pivot axis 4 of the boom 6.
  • the first direction of movement of the boom 6 corresponds to an upward movement.
  • a second drive 13 For pivoting the boom 6 in its second direction of movement, a second drive 13 is provided with a motor 14 provided on the superstructure frame 38, and thus indirectly on the superstructure 3, and with a second cable pulley 15 driven by the motor 14.
  • This second cable pulley 15 runs from this motor 14 via a deflection pulley 39 arranged on the superstructure frame 38 to a second force pivot point 16 provided on the boom 6 at a distance from the pivot axis 4 of the boom 6.
  • the force pivot point 16 is therefore located on the underside of the boom 6, i.e. on the side of the boom 6 opposite the force pivot point 12.
  • the motor 10 In the direction shown, the motor 10 is on the same axis as the motor 14 and is therefore in Fig. 1 not shown.
  • the second direction of movement of the boom 6 corresponds to a downward movement.
  • the arrangement of motor 10 or 14, power linkage point 12 or 16, and the deflection pulley 39 is selected such that, throughout the entire pivoting range of the boom 6, each cable pulley 11 or 15, with its area located between motor 10 and power linkage point 12, or with its area located between deflection pulley 39 and power linkage point 16, is no more than 20% of the distance between the pivot axis 48 of the boom 6 and the pivot axis 48 of the stick 7 from that part of the boom 6 to which it runs approximately parallel in this area. This prevents one of the cable pulleys 11 or 15 from interfering with the working space of the equipment 5 of the excavator 1.
  • a first drive 17 (not shown) is provided with a motor 18 (not shown) provided on the boom 6 and with a first cable 19 drivable by the motor.
  • This first cable 19 runs from this motor 18 (not shown) to a first force articulation point 20 provided on the boom 7 at a distance from the pivot axis 48 of the boom 7.
  • This first force articulation point 20 is provided on the boom 7 in front of the pivot axis 48 of the boom 7, as viewed in the direction of the initial region of the boom 7.
  • the first direction of movement of the stem 7 corresponds to an upward or stretching movement.
  • a second drive 21 is provided with a motor 22 provided on the boom 6 and with a second cable 23 drivable by the latter.
  • This second cable 23 runs from this motor 22 to a second force pivot point 24 provided on the stick 7 at a distance from the pivot axis 48 of the stick 7.
  • This second force pivot point 24 is provided on the underside 25 of the stick 7 at a distance from the pivot axis 48 of the stick 7.
  • the second cable 23 is also deflected by a deflection pulley 26 arranged on the boom 6. From the Fig. 1 In the direction shown, the motor 18 is on the same axis as the motor 22 and is therefore in Fig. 1 not shown.
  • the second direction of movement of the stem 7 corresponds to a downward or pulling movement.
  • the arrangement of motor 18 or 22, power linkage point 20 or 24, and the deflection pulley 26 is selected such that, throughout the entire pivoting range of the boom 7, each cable pulley 19 or 23, with its area located between motor 18 and power linkage point 20, or with its area located between deflection pulley 26 and power linkage point 24, is no more than 20% of the distance between the pivot axis 48 of the boom 7 and the pivot axis 49 of the bucket 8 from that part of the boom 7 to which it runs approximately parallel in this area. This prevents one of the cable pulleys 19 or 23 from interfering with the working area of the equipment 5 of the excavator 1.
  • a four-link coupling gear 29 is provided, which is pivoted on the one hand to a first pivot point 27 on the arm 7 and on the other hand to a second pivot point 28 on the bucket 8.
  • a first drive 30 (not shown) is provided with a motor 31 (not shown) provided on the arm 7 and with a drive shaft 32 which can be driven by the latter.
  • first cable 32 is provided. This first cable 32 runs from this motor 31 (not shown) to a first power linkage point 33 on the coupling gear 29, spaced from the pivot axis 49 of the bucket 8.
  • the first direction of movement of the bucket 8 corresponds to an opening movement.
  • a second drive 34 is provided with a motor 35 provided on the arm 7 and with a second cable 36 driven by the latter.
  • This second cable 36 runs from this second motor 35 via a deflection pulley 37 to the first power articulation point 33 on the coupling gear 29, which is spaced from the pivot axis 49 of the bucket 8.
  • the power articulation point 33 is a uniform power articulation point for pivoting the bucket 8 in both directions of movement.
  • the deflection pulley 37 is provided on the arm 7 closer to the pivot axis 49 of the bucket 8 than the articulation point 27 of the coupling gear 29.
  • the axis of the deflection pulley 37 provided on the arm 7 lies in line with the pivot axis 49 of the bucket 8. From the Fig. 1 In the direction shown, the motor 31 is on the same axis as the motor 34 and is therefore in Fig. 1 not shown. In the illustrated embodiment, the second direction of movement of the bucket 8 corresponds to a closing movement.
  • All motors intended for the movement of equipment 5 are designed as electric motors.
  • Fig. 2 shows the equipment 5 of the excavator 1 after Fig. 1 in a further state of motion, which differs from the state of motion of the Fig. 1 insofar as, on the one hand, the boom 6 is shifted further forward, i.e., in the direction of the bucket 8.
  • the boom 6 was pivoted in its second direction of movement by actuating the second drive 13 and partially retracting the second cable pull 15. This is done by driving the motor 14 of the drive 13 and winding the cable pull 15 onto a winch 42.
  • the first cable pull 11 was correspondingly partially omitted, since otherwise the pivoting of the boom 6 in the second direction of movement would not be possible.
  • the boom 6 was moved from the direction of view of Fig. 2 pivoted clockwise around its pivot axis 4.
  • the stick 7 is shifted further forward, i.e., in the direction of the bucket 8.
  • the stick 7 was pivoted in its first direction of movement by actuating the first drive 17 (not shown) and partially retracting the first cable 19. This occurs when the motor 18 (not shown) of the first drive 17 starts to rotate and winds the first cable 19 onto a winch 51 (not shown).
  • the second cable 23 was partially omitted, since otherwise the pivoting of the stick 7 in the second direction of movement would not be possible.
  • the stick 7 was viewed from Fig. 2 pivoted counterclockwise around its pivot axis 48.
  • Fig. 3 shows the first drive 17 and the second drive 21 of the stem 7, which are mounted on the Fig. 3 not shown boom 6. Both drives 17 and 21 are arranged coaxially, whereby the motors 18 and 22 can each be operated independently of one another.
  • the output length of the first cable 19 is reduced and the stem 7 (not shown) is pivoted in its first direction of movement.
  • the second cable 23 must be unwound from the winch 52 at the same time so that the stem 7 does not jam.
  • the length of the first cable 19 to be wound up is not necessarily identical to the length of the second cable 23 to be output.
  • the motor 22 For pivoting the handle 7 in its second direction of movement, the motor 22 must wind the second cable 23 onto the winch 52 and at the same time the motor 18 must pull the first cable 19 from the winch 51.
  • the length of the first cable 19 to be paid out is not necessarily identical to the length of the second cable 23 to be wound up.
  • Fig. 4 shows a further embodiment of the equipment 5 of an excavator 1 according to the invention.
  • the equipment 5 differs in this respect from the equipment shown in Fig. 2
  • the equipment shown in Figure 5 is designed as a single motor (not shown) with two camshafts each driven by a single motor (not shown). The same applies to the cable pulleys 19 and 23, as well as to the cable pulleys 32 and 36.
  • the two cable pulleys 11 and 15 for the two directions of movement of the boom 6 are each driven independently of one another by a single motor (not shown) that drives two different cam discs 43 and 44.
  • the shape of the two cam discs 43 and 44 is adapted to the geometric conditions of the boom 6 and the arrangement of the cam discs 43 and 44, as well as the position of the force pivot points 12 and 16 and the deflection pulley 39.
  • the two cam discs 43 and 44 are arranged on the shaft 46 of the motor.
  • the two cable pulleys 19 and 23 for the two directions of movement of the rod 7 are each driven independently of one another by a single motor (not shown) that drives two different cam discs 53 and 54.
  • the shape of the two cam discs 53 and 54 is adapted to the geometric conditions of the rod 7 and the arrangement of the cam discs 53 and 54, as well as the position of the force pivot points 20 and 24 and the deflection pulley 26.
  • the two cam discs 53 and 54 are arranged on the shaft 56 of the motor.
  • the two cable pulleys 32 and 36 for the two directions of movement of the bucket 8 are each designed to be dependent on one another, with a single motor (not shown) driving two different cam discs 63 and 64.
  • the shape of the two cam discs 63 and 64 is adapted to the geometric conditions of the bucket 8 and the arrangement of the cam discs. 63 and 64 as well as the position of the force pivot point 33 and the deflection pulley 37.
  • the two cam discs 63 and 64 are arranged on the shaft 66 of the motor.
  • Fig. 5 shows the cam discs 53 and 54 as well as the associated motor 45 of the stem 7 (not shown) of the object according to Fig. 4 .
  • the motor 45 has a shaft 56 on which both cam disks 53 and 54 are arranged. In this respect, when its shaft 56 rotates, the motor 45 necessarily pivots both cam disks 53 and 54 equally.
  • the cam disks 53 and 54 are each approximately semicircular, each with a running surface 57 or 58, wherein the respective running surface 57 or 58 specifies the desired cam geometry of the cam disk 53 or 54.
  • the cam disks 53 and 54 each receive the shaft 56 eccentrically and have an angular offset from one another on the shaft 56.
  • the first cable 19 for pivoting the stem 7 (not shown) in its first direction of movement is arranged on the running surface 57 of the cam disc 53 on the side of the running surface 57 closest to the receiving portion of the shaft 56.
  • the first cable 19 winds up onto the running surface 57 of the cam disc 53 when the motor 45 rotates counterclockwise.
  • the second cable 23 for pivoting the stem 7 (not shown) in its second direction of movement is arranged on the running surface 58 of the cam disc 54 on the side of the running surface 58 opposite the receptacle of the shaft 56.
  • the second cable 23 unwinds from the running surface 58 of the cam disc 54 when the motor 45 rotates counterclockwise.
  • the first cable 19 By rotating the shaft 56, the first cable 19 can be wound up and the second cable 23 can be unwound at the same time, thereby pivoting the stem 7 (not shown) in its first direction of movement without jamming.
  • the geometry of the running surfaces 57 and 58 of the respective cam discs 53 and 54 and the set angle of rotation offset between the two cam discs 53 and 54 With the same rotation, different lengths of the respective cable pull 19 or 23 can be wound up or unwound. In this respect, the fact can be taken into account that the length of the first cable pull 19 to be output for pivoting without jamming the stem 7 (not shown) does not have to be identical to the length of the second cable pull 23 to be wound up in the embodiment shown.
  • Fig. 6 shows the coupling gear 29 for moving the bucket 8 of the object to Fig. 1 in two different states of motion.
  • Fig. 6 left the state of motion according to the representation in Fig. 1 depicted, whereas in Fig. 6 A further state of movement is shown on the right.
  • This further state of movement differs from the first state of movement in that the bucket 8 has been pivoted in its first direction of movement, i.e. counterclockwise in the illustration, about its axis of rotation 49, which is arranged coaxially with the deflection pulley 37.
  • the first cable 32 was partially wound up, as a result of which the first force pivot point 33 was displaced in the direction of the first cable 32.
  • the first force pivot point 33 is a uniform force pivot point for pivoting the bucket 8 in both directions of movement.
  • the second cable 36 was partially unwound.
  • the second pivot point 28 was also displaced and in this respect the distance between the first pivot point 27 and the second pivot point 28 was reduced.
  • the bucket 8 was thereby pivoted in its first direction of movement and thus opened.
  • Fig. 7 shows parts of the equipment 5 of the item according to Fig. 1 in different states of motion.
  • the letter a and dotted lines indicate the first state of motion
  • the letter b and solid lines indicate the second state of motion.
  • the stem 7 is pivoted in its first direction of motion in its second state of motion (7b) compared to its first state of motion (7a).
  • the unwound part of the first cable 19a of the first state of motion is therefore longer than the unwound part of the first cable 19b of the second state of motion.
  • the reverse applies for the unwound part of the second cable 23a in the first movement state is shorter than the unwound part of the second cable 23b in the second movement state.

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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)
EP23195355.5A 2023-09-05 2023-09-05 Excavateur Pending EP4520871A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23195355.5A EP4520871A1 (fr) 2023-09-05 2023-09-05 Excavateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23195355.5A EP4520871A1 (fr) 2023-09-05 2023-09-05 Excavateur

Publications (1)

Publication Number Publication Date
EP4520871A1 true EP4520871A1 (fr) 2025-03-12

Family

ID=87933570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23195355.5A Pending EP4520871A1 (fr) 2023-09-05 2023-09-05 Excavateur

Country Status (1)

Country Link
EP (1) EP4520871A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639826A (en) * 1950-04-10 1953-05-26 David P Welden Articulated boom
DE1784822A1 (de) * 1968-09-23 1972-01-20 Teredo Maskin Ab Verbesserungen an hydraulischen Baggern

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639826A (en) * 1950-04-10 1953-05-26 David P Welden Articulated boom
DE1784822A1 (de) * 1968-09-23 1972-01-20 Teredo Maskin Ab Verbesserungen an hydraulischen Baggern

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