EP3947832B1 - Dispositif de verrouillage pour accoupler un élément d'usure à un support dans un engin de terrassement - Google Patents

Dispositif de verrouillage pour accoupler un élément d'usure à un support dans un engin de terrassement Download PDF

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Publication number
EP3947832B1
EP3947832B1 EP20715071.5A EP20715071A EP3947832B1 EP 3947832 B1 EP3947832 B1 EP 3947832B1 EP 20715071 A EP20715071 A EP 20715071A EP 3947832 B1 EP3947832 B1 EP 3947832B1
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EP
European Patent Office
Prior art keywords
locking element
movement
locking
internal
internal element
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EP20715071.5A
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German (de)
English (en)
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EP3947832A1 (fr
Inventor
José LÓPEZ ALMENDROS
Kamal BOBOUH ABAKOUY
Justo Jesús Ortiz García
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Metalogenia Research and Technologies SL
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Metalogenia Research and Technologies SL
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Publication of EP3947832A1 publication Critical patent/EP3947832A1/fr
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Classifications

    • 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
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2833—Retaining means, e.g. pins
    • E02F9/2841—Retaining means, e.g. pins resilient

Definitions

  • a locking device is designed for a specific support and wear element pair. The designer must therefore know all the details of both the support and wear element affecting the locking device. The designer must particularly know the relevant dimensions of both the support and wear element for the design of the locking device. Additionally, it must be taken into account that the wear system is designed to sustain given wear. In this sense, the expected wear of the wear system and how it will affect the locking device and the dimensions of the wear element and of the support affecting the locking device are also known. All these data are "starting information" when a specific locking device has to be designed. Therefore, it must be considered that all this information "is part of the locking device itself" since they are pre-established values for the design thereof.
  • the claims may define an entity (e.g., the locking device as such), it is admissible that they refer to the wear element, the support or parts thereof when defining the locking device, as, in fact, the relevant data of the wear element and the support are implicitly part of the locking device as such.
  • Earth moving machines are used in excavation, demolition, construction, mining, and dredging works and similar activities. They generally have a shovel or bucket where the material is collected.
  • the shovel or bucket is subjected to high stresses and erosion, particularly in the area of the lip (also referred to as blade).
  • the shovel or bucket usually has a plurality of wear elements protecting it against wear and impacts and/or improving penetration in the ground, such as teeth, supports or tooth bars (also referred to as adapters), and/or (front and side) guards, for example.
  • the object of the invention is to overcome these drawbacks. This is achieved by means of a locking device of the type indicated above, characterized in that the locking device comprises:
  • the wear element has a cavity in which a nose arranged in the support (for example, the adapter) on which the wear element will be assembled is housed.
  • a hole in the nose defines a housing and one of the walls of the cavity (the one facing the open end of the housing) has another hole such that, in an assembled position, the hole in the wall of the cavity is superimposed on (i.e., aligned or overlapping with) the housing and the locking device (which is substantially an elongated pin) can be introduced through the hole in the wall of the cavity until it is housed in the housing.
  • the hole in the nose may be a through hole (so that the housing has two open ends), in which case there may be two holes in both walls of the cavity facing the open ends of the housing.
  • the locking element In general, in the retracted position the locking element must be completely within the housing so that the wear element can be put over the nose of the support without being impeded by the locking element. In the retracted position the locking element is completely outside the hole,
  • One of the additional advantages of the present invention is that its configuration facilitates disassembly, since the force of the elastic means facilitates the retraction (or withdrawing) of the locking device.
  • Another advantage of the present invention is in that the locking device is inside the housing of the support, since the user thereby does not have to take the locking device out when changing the wear element, but rather can extract the wear element and put a new on in place without handling the locking device. That is particularly interesting since it is often not necessary to change the locking device (which can continue to be operative) when the wear element is changed, which allows achieving cost savings.
  • the locking element is a cylindrical body with a base facing the internal element and the internal element is also a cylindrical body with a base facing the locking element.
  • This geometry of both elements allows a particularly advantageous embodiment of the rotation means in which the base of the internal element facing the locking element comprises a first inclined surface and the base of the locking element facing the internal element comprises a second inclined surface, where in the retracted position, both inclined surfaces are superimposed on one another, and during a movement between the retracted position and the extended position the second inclined surface slides over the first inclined surface, causing the movement of the locking element with respect to the internal element.
  • the inclined surfaces a rotational movement can be transformed into a linear movement according to the direction of movement.
  • the force exerted by the elastic means tends to bring the first inclined surface and the second inclined surface together.
  • transitioning from retracted position to the extended position is achieved by means of a rotation of the locking element with respect to the internal element of 360° or less, preferably 180° or less, and very preferably 90°.
  • the locking device comprises anti-rotation means suitable for preventing rotation thereof with respect to the support.
  • anti-rotation means are advantageously arranged in the capsule.
  • the locking device comprises air discharge means communicating the space comprised between the locking element and the internal element with the outside.
  • air discharge means allow the air trapped in this space to be discharged, preventing the generation of overpressure in this space.
  • the locking device comprises an O-ring at an intermediate point of the side surface of the locking element.
  • the purpose of this O-ring is to prevent, during operation of the earth moving machine, dirt and/or fines (fines are understood in the present description as small-sized particles) from getting into the wear device.
  • this O-ring may exacerbate the risk of the overpressure indicated above being generated.
  • the air discharge means comprises an air discharge conduit extending between the space comprised between the locking element and the internal element and an upper end, where the upper end of the air discharge conduit is, according to the direction of movement, below the O-ring when the locking element and the internal element are in the extended position, and is, according to the direction of movement, above the O-ring when the locking element and the internal element are in the retracted position.
  • the air discharge conduit is a cavity arranged between the outer side surface of the locking element and the side surface of said capsule.
  • a preferred embodiment of a locking device is when the device comprises a rod with a first end fixed to the internal element and a second end housed inside a cavity arranged in the locking element, where the second end is suitable for being moved according to the direction of movement along the cavity, where the cavity has an opening oriented towards the internal element and with the rod going through same, and where the elastic means are arranged between the second end of the rod and the opening.
  • the first end of the rod it is particularly advantageous for the first end of the rod to be fixed (and preferably screwed) to the internal element.
  • the locking element it is also particularly advantageous for the locking element to have a mounting hole coaxial with the direction of movement and with a diameter greater than the maximum diameter of the rod such that the rod is suitable for being housed in the cavity through the mounting hole.
  • a locking device equivalent to the preceding embodiment but "inverted"
  • the locking device comprises a rod with a first end fixed to the locking element and a second end housed inside a cavity arranged in the internal element, where the second end is suitable for being moved according to the direction of movement along the cavity, where the cavity has an opening oriented towards the locking element and with the rod going through same, and where the elastic means are arranged between the second end of the rod and the opening.
  • the first end of the rod to be screwed to the locking element, for the internal element to have a mounting hole coaxial with the direction of movement and with a diameter greater than the maximum diameter of the rod such that the rod is suitable for being housed in the cavity through the mounting hole, and for the device to comprise a plug closing the mounting hole.
  • a locking device in a further preferred embodiment of a locking device according to the invention is when the device comprises a capsule housing therein the internal element and at least the internal end of the locking element and, additionally, the device comprises a rod with a first end fixed to the locking element and a second end housed inside a hollow space arranged in the capsule between the internal element and an inner end of the capsule opposed to an open end of the capsule, where the second end is suitable for being moved according to the direction of movement along the hollow space, where the internal element has a central opening communicating the locking element with the hollow space and with the rod going through the central opening, and where the elastic means are arranged between the second end of the rod and the central opening.
  • the first end of the rod is screwed to the locking element or, alternatively, it is fixed to the locking element through a hinged joint.
  • the elastic means have a length D in an unloaded state, measured in the sense of the direction of movement, and are suitable for being compressed at most to a length T, measured in the sense of the direction of movement, and that the locking element and the internal element separate a distance E upon moving from the retracted position to the extended position, measured in the sense of said direction of movement.
  • the difference between D and T is greater than or equal to E. It is thereby assured that the elastic means are not compressed above their allowable value.
  • one advantage of the present invention is that the elastic means exert a force which helps to retract the locking device. This allows providing another advantageous solution which is achieved when the elastic means are in a partially compressed state when the locking element and the internal element are in the retracted position. It is thereby assured that the elastic means are exerting a force along the entire path between the deployed position and retracted position, which assures that the locking element reaches the retracted position completely (i.e., it prevents the risk of being slightly deployed, which may occur if the elastic means stop exerting any force in the retracted position). Additionally, the elastic means preventing the locking device from moving out of its retracted position in an unwanted manner during the undesired handling thereof, is also achieved.
  • this final embodiment consists of a locking device extending at both ends. It is common for the housing in the nose of the support to be a through hole and for the wear element to have two holes, each of them located on opposite walls of the cavity. In these cases, the locking device is to be fitted in both holes, such that the wear element is locked at two points. This final embodiment allows achieving this objective.
  • the locking element 1 and the internal element 2 are substantially cylindrical bodies suitable for being housed inside the capsule 7, which is also cylindrical.
  • the two cylindrical bodies are arranged such that their axes coincide (and they coincide with the direction of movement). Therefore, the cylindrical body forming the locking element 1 has a base facing a base of the cylindrical body forming the internal element 2.
  • the movement means comprise rotation means.
  • the rotation means include a first inclined surface 15 arranged at the base of the internal element 2 facing the locking element 1 and a second inclined surface 16 at the base of the locking element 1 facing the internal element 2.
  • the first and the second inclined surfaces 15 and 16 have a helical configuration, such that they can slide with respect to one another upon rotation of the locking element 1 with respect to the internal element 2. Due to this helical configuration, the rotation also causes a movement in the direction of the axis of the helical surface, which is therefore the direction of movement.
  • the internal element 2 has two first inclined surfaces 15 and the locking element 1 also has two second inclined surfaces 16, such that each first inclined surface 15 is paired with a second inclined surface 16.
  • each inclined surface 15 and 16 there is a seating surface 17 (the first seating surface and the second seating surface, respectively).
  • a seating surface 17 the first seating surface and the second seating surface, respectively.
  • the seating surface 17 of the internal element 2 comprises a first elevation 18 at the end opposite the attachment area between the seating surface 17 and the first inclined surface 15. This first elevation 18 prevents the locking element 1 from being inadvertently rotated beyond this point, which would cause it to be abruptly retracted.
  • the seating surface 17 of the internal element 2 also comprises a second elevation 19 at the end close to the attachment area between the seating surface 17 and the first inclined surface 15. In this case, the purpose of this second elevation 19 is to prevent, due to the vibrations and shaking to which the locking device is subjected during use, the locking element 1 from being able to move from the stable position defined by the seating surfaces 17 and being retracted due to the force of the elastic means.
  • the transition from the retracted to the deployed position (and vice versa) is achieved by means of a 90° rotation (a fourth of a turn).
  • the base of the locking element 1 which is at the locking end 8, i.e., the base opposite the internal element 2, has an hole 20 suitable for inserting a rotating tool.
  • This hole 20 has a shape with a substantially square cross-section.
  • the elastic means comprise a coil spring 4.
  • the spring 4 is assembled around a rod 3.
  • the rod 3 has a first end 21 fixed to the internal element 2 by means of a screw 13.
  • the second end 23 of the rod 3 is housed inside a cavity 24 arranged in the locking element 1 and is suitable for being moved according to the direction of movement along the cavity 24 when the locking device is extended or retracted.
  • the second end 23 has a head 25 retaining the spring 4.
  • the cavity 24 has an opening 26 oriented towards the internal element 2 and with the rod 3 going through same.
  • the opening 26 has a smaller size than the spring 4, such that the spring 4 is retained between the head 25 and the opening 26.
  • the opening 26 is in a closing element 5 which is screwed to the locking element 1.
  • the closing element 5 has a larger diameter than the head 25, such that it is possible to introduce the head 25 and the spring 4 into the cavity 24 and then screw the closing element 5 in the locking element 1.
  • Figures 12 to 18 show a second embodiment of a locking device according to the invention.
  • the locking element 1 has a mounting hole 27 coaxial with the direction of movement and with a diameter greater than the maximum diameter of the rod 3 (i.e., the maximum diameter defined by the head 25).
  • the rod 3 can therefore be housed in the cavity 24 by introducing it through the mounting hole 27.
  • the end of the rod 3 opposite the head 25 is threaded and goes through the opening 26 (which is smaller than the spring 4 in this case, since the spring 4 is also introduced in the cavity 24 through the mounting hole 27). This threaded end can be screwed to the internal element 2, such that the ensemble is assembled.
  • a plug 28 closes the mounting hole 27.
  • the locking element is larger than the internal element and the cavity in which the head of the rod and the spring are housed is in the locking element.
  • a locking device in which the rod is fixed to the locking element and the internal element is large enough to house therein a cavity containing the head of the rod and the spring, i.e., a configuration "symmetrical" to the one shown in the preceding examples.
  • the second embodiment of Figures 12 to 18 also includes air discharge means communicating the space comprised between the locking element 1 and the internal element 2 with the outside.
  • these air discharge means may be included in a manner that is exactly identical in the first embodiment or the "symmetrical" embodiments indicated above.
  • the purpose of these air discharge means is to prevent the overpressure generated in the space comprised between the locking element 1 and the internal element 2 upon trying to retract the locking device.
  • the O-ring 6 hinders the passage of air from this inner space to the outside.
  • the locking device includes an air discharge conduit 29 extending between this inner space and an upper end 30 of the air discharge conduit 29. The position of this upper end 30 is important.
  • the purpose of the O-ring 6 is to prevent dirt and/or fines from getting into the locking device. Therefore, when the locking device is extended, it is important for the O-ring 6 to be able to perform its function, so the upper end 30 of the air discharge conduit 29 must be "below" the O-ring 6 (see Figure 15 and the enlarged detail of Figure 17 ).
  • the upper end 30 of the air discharge conduit 29 When the locking device is retracted, the upper end 30 of the air discharge conduit 29 must be "above" the O-ring 6, such that communication is established between the inner space and the outside which allows the exit of the air (see Figure 14 and the enlarged detail of Figure 16 ).
  • the most advantageous aspect is that the upper end 30 of the air discharge conduit 29 is close to (below) the O-ring 6 when the locking device is extended, such that upon initiating retraction, the upper end 30 is quickly located above the O-ring 6 and the overpressure generated in the inner space is as low as possible.
  • the air discharge conduit 29 has been formed from a cavity or gap between the outer side surface of the locking element 1 and the inner side surface of the capsule 7.
  • the inner side surface of the capsule 7 is not completely cylindrical, but rather has a segment (the one corresponding to the air discharge conduit 29) that is oval-shaped or ellipsoidal (see Figure 18 , which schematically shows a cross-section of the locking element 1 and the capsule 7). Therefore, between both sides surfaces there is a gap that is sufficient for allowing the passage of air. In any case, this gap must large enough so as to assure that the O-ring 6 no longer applies a sealed closure.
  • Figures 19 and 20 show another embodiment of a locking device according to the invention.
  • the same references have been used for those elements which are common with the preceding embodiments.
  • the main difference resides in the fact that the base of the internal element 2 facing the locking element 1 comprises a first guide surface 31 opposite the first inclined surface 15 and the base of the locking element 1 facing the internal element 2 comprises a second guide surface 32 opposite the second inclined surface 16.
  • the locking element 1 has a helical finger 33 which is suitable for being housed in a helical housing 34 arranged in the internal element 2.
  • the helical finger 33 defines the second inclined surface 16 and the second guide surface 32, which are on opposite sides of the helical finger 33.
  • the helical housing 34 defines the first inclined surface 15 and the first guide surface 31, which are two opposing faces of the helical housing 34.
  • the second elevation 19 generally has a maximum elevation point 35 (in the solution shown in the drawings it is an arris) having a maximum height, in the sense of the direction of movement, with respect to the seating surface 17. This maximum height is determined such that it is assured that the locking element 1 cannot "jump out” of the seating surface 17 onto the first inclined surface 15, but it is low enough such that it can be overcome when taking the locking element 1 to its extended position.
  • the first guide surface 31 (which corresponds to the first inclined surface 15 which, in turn, corresponds to the first seating surface 17) extends, in the direction of movement, beyond the maximum elevation point 35. It is thereby assured that when the locking element 1 is in its extended position and rotation starts to take the locking element 1 to its retracted position, the two guide surfaces 31 and 32 immediately come into contact once the locking element 1 has overcome the maximum elevation point (35) of the second elevation 19.
  • Figure 11 shows an example in which two locking devices are used for fixing a wear element to a support.
  • one locking device which, while having a single internal element, has two locking elements extending on each side of the internal element, as discussed above.
  • FIGs 21 to 24 show another preferred embodiment of a locking device according to the invention.
  • the same references have been used for those elements which are common with the preceding embodiments, although some of them are organized in a different way.
  • the device comprises a locking element 1, an internal element 2, a rod 3 and a spring 4.
  • the locking element 1 has an O-ring 6 extending along its side perimeter. These components are housed inside a capsule 7. When the locking device is in the extended position, a locking end 8 of the locking element 1 projects from the capsule 7 (see Figures 23 and 24 ).
  • the internal element 2 is fixed to the capsule 7 through fixing means 41 (preferably a bolt) at an intermediate point of the capsule 7, so that between the bottom of the internal element 2 and the inner end 37 of the capsule 7 there is a hollow space 36.
  • the capsule 7 has a side projection 14 which prevents the capsule 7 from being able to rotate with respect to the housing (9).
  • the main difference between this embodiment and the previous ones resides in the fixing and positioning of the rod 3 and the spring 4.
  • the rod 3 has the first end 21 that is threaded, and it is threaded to the locking element 1.
  • the second end 23 of the rod 3 is housed inside the hollow space 36 and is suitable for being moved according to the direction of movement along the hollow space 36 when the locking device is extended or retracted.
  • the second end 23 has a head 25 retaining the spring 4.
  • the internal element 2 has a central opening 39 communication the locking element 1 with the hollow space 36 and with the rod 3 going through this central opening 39.
  • the central opening 39 has a smaller size than the spring 4, such that the spring 4 is retained between the head 25 and the central opening 39.
  • Figure 25 shows a variant of this last embodiment in which the first end 21 of the rod 3 is not threaded to the locking element 1 but fixed to the locking element 1 through a hinged joint (40).
  • Figure 26 shows one embodiment of locking device that is formed by two locking devices as shown in Figures 21 to 24 faced opposite to each other and with the inner end 37 of both capsules 7 welded together.
  • Figure 27 is a variant of the locking device of Figure 26 in which, instead of having two capsules 7 welded together, the device has only one capsule 7.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Earth Drilling (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Connection Of Plates (AREA)
  • Gripping On Spindles (AREA)
  • Lock And Its Accessories (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Agricultural Machines (AREA)

Claims (17)

  1. Dispositif de verrouillage pour coupler un élément d'usure (11) à un support (10) dans une machine de terrassement, ledit support (10) comprenant un logement (9), ledit logement (9) définissant un axe longitudinal, et ledit élément d'usure comprenant un trou (12), ledit trou (12) définissant un axe longitudinal de sorte que, dans une position assemblée, les axes longitudinaux soient tous deux parallèles l'un à l'autre et proches l'un de l'autre ou coïncident dans l'espace de sorte que ledit logement (9) et ledit trou (12) soient au moins partiellement alignés et qu'une section transversale dudit trou (12) projetée selon l'axe longitudinal dudit trou (12) chevauche, ou chevauche au moins partiellement, la section transversale dudit logement (9), où ledit trou (12) et ledit logement (9) sont mutuellement exclusifs dans le sens où ni le trou (12) ne comporte une partie du logement (9) ou la totalité du logement (9) ni le logement (9) ne comporte une partie du trou (12) ou la totalité du trou (12), où ledit trou (12) et ledit logement (9) sont alignés dans le sens où, dans une direction selon les deux axes longitudinaux, dans le cas où il y a un chevauchement complet, l'un d'eux commence quand l'autre finit, et dans le cas où il y a uniquement un chevauchement partiel, les parties dudit trou (12) et dudit logement (9) qui correspondent à la zone de chevauchement sont alignées,
    où ledit dispositif de verrouillage est approprié pour être introduit à l'intérieur dudit logement (9), caractérisé en ce que ledit dispositif de verrouillage comprend :
    - un élément de verrouillage (1) avec une extrémité de verrouillage (8) et une extrémité interne opposée à ladite extrémité de verrouillage (8),
    - un élément interne (2),
    - des moyens de déplacement appropriés pour déplacer ledit élément de verrouillage (1) par rapport audit élément interne (2) de manière réversible entre une position rétractée et une position déployée, où le déplacement entre ladite position rétractée et ladite position déployée définit une direction de déplacement, où, dans ladite position rétractée, ledit élément de verrouillage (1) est complètement à l'intérieur dudit logement (9) et complètement à l'extérieur dudit trou (12), et
    - des moyens élastiques qui, dans ladite position déployée, exercent une force dans la direction de ladite direction de déplacement qui tend à rapprocher ledit élément de verrouillage (1) dudit élément interne (2).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend une capsule (7) logeant à l'intérieur ledit élément interne (2) et au moins ladite extrémité interne dudit élément de verrouillage (1).
  3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que lesdits moyens de déplacement comprennent des moyens de rotation.
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit élément de verrouillage (1) est un corps cylindrique avec une base tournée vers ledit élément interne (2), et ledit élément interne (2) est un corps cylindrique avec une base tournée vers ledit élément de verrouillage (1).
  5. Dispositif selon la revendication 4, caractérisé en ce que la base dudit élément interne (2) tournée vers ledit élément de verrouillage (1) comprend une première surface inclinée (15), et la base dudit élément de verrouillage (1) tournée vers ledit élément interne (2) comprend une deuxième surface inclinée (16), où, dans ladite position rétractée, les surfaces inclinées sont toutes deux superposées l'une sur l'autre, et pendant un déplacement entre ladite position rétractée et ladite position déployée, ladite deuxième surface inclinée (16) glisse sur ladite première surface inclinée (15), provoquant le déplacement dudit élément de verrouillage (1) par rapport audit élément interne (2).
  6. Dispositif selon la revendication 5, caractérisé en ce que la base dudit élément interne (2) tournée vers ledit élément de verrouillage (1) comprend une première surface d'assise (17) agencée à l'extrémité de ladite première surface inclinée (15) qui, dans ladite position déployée, est plus proche dudit élément de verrouillage (1), et la base dudit élément de verrouillage (1) tournée vers ledit élément interne (2) comprend une deuxième surface d'assise (17) agencée à l'extrémité de ladite deuxième surface inclinée (16) qui, dans ladite position déployée, est plus proche dudit élément interne (2), où, dans ladite position déployée, les surfaces d'assise (17) sont toutes deux superposées l'une sur l'autre, et de préférence, une desdites surfaces d'assise (17) comprend une première élévation (18) à l'extrémité de ladite surface d'assise (17) opposée à la zone de fixation entre ladite surface d'assise (17) et sa surface inclinée correspondante.
  7. Dispositif selon la revendication 6, caractérisé en ce qu'une desdites surfaces d'assise (17) comprend une deuxième élévation (19) à l'extrémité de ladite surface d'assise (17) proche de la zone de fixation entre ladite surface d'assise (17) et sa surface inclinée correspondante.
  8. Dispositif selon l'une quelconque des revendications 5 à 7, caractérisé en ce que la base dudit élément interne (2) tournée vers ledit élément de verrouillage (1) comprend une première surface de guidage (31) opposée à ladite première surface inclinée (15), et la base dudit élément de verrouillage (1) tournée vers ledit élément interne (2) comprend une deuxième surface de guidage (32) opposée à ladite deuxième surface inclinée (16), où, dans ladite position rétractée, la première surface de guidage (31) et la deuxième surface de guidage (32) sont superposées l'une sur l'autre, et pendant un déplacement entre ladite position rétractée et ladite position déployée, ladite deuxième surface de guidage (32) glisse le long de ladite première surface de guidage (31), et de préférence, une desdites surfaces d'assise (17) comprend une deuxième élévation (19) à l'extrémité de ladite surface d'assise (17) proche de la zone de fixation entre ladite surface d'assise (17) et sa surface inclinée correspondante, et ladite deuxième élévation (19) a un point d'élévation maximal (35) ayant une hauteur maximale dans le sens de ladite direction de déplacement par rapport à ladite surface d'assise (17), et en ce que la surface de guidage correspondant à la surface inclinée correspondant à ladite surface d'assise s'étend, dans ladite direction de déplacement, au-delà dudit point d'élévation maximal (35).
  9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comprend des moyens d'évacuation d'air faisant communiquer l'espace compris entre ledit élément de verrouillage (1) et ledit élément interne (2) avec l'extérieur.
  10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il comprend un joint torique (6) en un point intermédiaire de la surface latérale dudit élément de verrouillage (1).
  11. Dispositif selon les revendications 9 et 10, caractérisé en ce que lesdits moyens d'évacuation d'air comprennent un conduit d'évacuation d'air (29) s'étendant entre ledit espace compris entre ledit élément de verrouillage (1) et ledit élément interne (2) et une extrémité supérieure (30), où ladite extrémité supérieure (30) dudit conduit d'évacuation d'air (29) est, selon ladite direction de déplacement, en dessous dudit joint torique (6) lorsque ledit élément de verrouillage (1) et ledit élément interne (2) sont dans ladite position déployée, et est, selon ladite direction de déplacement, au-dessus dudit joint torique (6) lorsque ledit élément de verrouillage (1) et ledit élément interne (2) sont dans ladite position rétractée.
  12. Dispositif selon l'une quelconque des revendications 1 à 11, caractérisé en ce qu'il comprend une tige (3) avec une première extrémité (21) fixée audit élément interne (2) et une deuxième extrémité (23) logée à l'intérieur d'une cavité (24) agencée dans ledit élément de verrouillage (1), où ladite deuxième extrémité (23) est appropriée pour être déplacée selon ladite direction de déplacement le long de ladite cavité (24), où ladite cavité (24) a une ouverture (26) orientée vers ledit élément interne (2), ladite tige (3) passant à travers celle-ci, et où lesdits moyens élastiques sont agencés entre ladite deuxième extrémité (23) de ladite tige (3) et ladite ouverture (26).
  13. Dispositif selon l'une quelconque des revendications 1 à 11, caractérisé en ce qu'il comprend une tige (3) avec une première extrémité (21) fixée audit élément de verrouillage (1) et une deuxième extrémité (23) logée à l'intérieur d'une cavité (24) agencée dans ledit élément interne (2), où ladite deuxième extrémité (23) est appropriée pour être déplacée selon ladite direction de déplacement le long de ladite cavité (24), où ladite cavité (24) a une ouverture (26) orientée vers ledit élément de verrouillage (1), ladite tige (3) passant à travers celle-ci, et où lesdits moyens élastiques sont agencés entre ladite deuxième extrémité (23) de ladite tige (3) et ladite ouverture (26).
  14. Dispositif selon la revendication 2 ou l'une quelconque des revendications 3 à 11 lorsqu'elle dépend de la revendication 2, caractérisé en ce qu'il comprend une tige (3) avec une première extrémité (21) fixée audit élément de verrouillage (1) et une deuxième extrémité (23) logée à l'intérieur d'un espace creux (36) agencé dans ladite capsule (7) entre ledit élément interne (2) et une extrémité intérieure ouverte (37) de ladite capsule (7) opposée à une extrémité (38) de ladite capsule (7), où ladite deuxième extrémité (23) est appropriée pour être déplacée selon ladite direction de déplacement le long dudit espace creux (36), où ledit élément interne (2) a une ouverture centrale (39) faisant communiquer ledit élément de verrouillage (1) avec ledit espace creux (36) et avec ladite tige (3) passant par ladite ouverture centrale (39), et où lesdits moyens élastiques (4) sont agencés entre ladite deuxième extrémité (23) de ladite tige (3) et ladite ouverture centrale (39), et de préférence, en ce que ladite première extrémité (21) de ladite tige (3) est vissée audit élément de verrouillage (1), ou en ce que ladite première extrémité (21) de ladite tige (3) est fixée audit élément de verrouillage (1) par un joint articulé (40).
  15. Dispositif selon l'une quelconque des revendications 1 à 14, caractérisé en ce que lesdits moyens élastiques ont une longueur D dans un état non chargé, mesurée dans le sens de ladite direction de déplacement, et sont appropriés pour être comprimés au maximum à une longueur T, mesurée dans le sens de ladite direction de déplacement, et ledit élément de verrouillage (1) et ledit élément interne (2) se séparent d'une distance E lors du déplacement de ladite position rétractée à ladite position déployée, mesurée dans le sens de ladite direction de déplacement, et où la différence entre D et T est supérieure ou égale à E.
  16. Dispositif selon l'une quelconque des revendications 1 à 15, caractérisé en ce que lesdits moyens élastiques sont dans un état partiellement comprimé lorsque ledit élément de verrouillage (1) et ledit élément interne (2) sont dans ladite position rétractée, et de préférence, lesdits moyens élastiques dans ledit état partiellement comprimé ont une longueur P, mesurée dans le sens de ladite direction de déplacement, et sont appropriés pour être comprimés au maximum à une longueur T, mesurée dans le sens de ladite direction de déplacement, et ledit élément de verrouillage (1) et ledit élément interne (2) se séparent d'une distance E lors du déplacement de ladite position rétractée à ladite position déployée, mesurée dans le sens de ladite direction de déplacement, et où la différence entre P et T est supérieure ou égale à E.
  17. Dispositif selon l'une quelconque des revendications 1 à 16, caractérisé en ce qu'il comprend :
    - un deuxième élément de verrouillage identique audit élément de verrouillage (1),
    - des deuxièmes moyens de déplacement identiques auxdits moyens de déplacement et appropriés pour déplacer ledit deuxième élément de verrouillage par rapport audit élément interne (2) de manière réversible entre une position rétractée et une position déployée, où le déplacement entre ladite position rétractée et ladite position déployée a lieu dans ladite direction de déplacement,
    - des deuxièmes moyens élastiques identiques auxdits moyens élastiques qui, dans ladite position déployée, exercent une force dans la direction de ladite direction de déplacement qui tend à rapprocher ledit deuxième élément de verrouillage dudit élément interne (2).
EP20715071.5A 2019-04-03 2020-04-02 Dispositif de verrouillage pour accoupler un élément d'usure à un support dans un engin de terrassement Active EP3947832B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/ES2019/070224 WO2020201587A1 (fr) 2019-04-03 2019-04-03 Dispositif de blocage pour fixer un élément d'usure dans un support d'une machine de travaux de terrassement
PCT/EP2020/059389 WO2020201418A1 (fr) 2019-04-03 2020-04-02 Dispositif de verrouillage pour accoupler un élément d'usure à un support dans un engin de terrassement

Publications (2)

Publication Number Publication Date
EP3947832A1 EP3947832A1 (fr) 2022-02-09
EP3947832B1 true EP3947832B1 (fr) 2023-04-26

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EP20715071.5A Active EP3947832B1 (fr) 2019-04-03 2020-04-02 Dispositif de verrouillage pour accoupler un élément d'usure à un support dans un engin de terrassement

Country Status (11)

Country Link
EP (1) EP3947832B1 (fr)
CN (1) CN113646490B (fr)
AU (1) AU2020255269A1 (fr)
BR (1) BR112021019851A2 (fr)
CA (1) CA3135312C (fr)
CL (1) CL2021002451A1 (fr)
ES (1) ES2944715T3 (fr)
MX (1) MX2021012083A (fr)
PE (1) PE20212020A1 (fr)
WO (2) WO2020201587A1 (fr)
ZA (1) ZA202106676B (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664450A (en) * 1983-03-02 1987-05-12 Padley & Venables Limited Holder for a pick, and the combination of a pick and holder
US5709043A (en) * 1995-12-11 1998-01-20 Esco Corporation Excavating tooth
BRPI0418595B1 (pt) * 2004-03-30 2015-07-07 Metalogenia Sa Dispositivo removível para fixação de duas peças mecânicas, parte fêmea para ser unida a uma parte macho e contendo pelo menos um furo para a introdução de um pino e parte macho para ser acoplada a uma parte fêmea e que tem um invólucro dentro para receber um pino
AU2013203553B2 (en) * 2007-05-10 2017-02-02 Esco Group Llc Wear assembly for excavating equipment
FR2979647B1 (fr) * 2011-09-01 2013-10-04 Afe Metal Systeme mecanique comprenant un dispositif de liaison entre une piece d'usure et son support, godet d'engin de travaux publics et procede de mise en oeuvre d'un tel systeme
FR2979646B1 (fr) * 2011-09-01 2013-10-04 Afe Metal Systeme mecanique comprenant un dispositif de liaison entre une piece d'usure et son support, godet d'engin de travaux publics et procede de mise en oeuvre d'un tel systeme
EP2952639A1 (fr) * 2014-06-02 2015-12-09 Metalogenia Research & Technologies S.L. Dispositif de verrouillage destiné à fixer un élément d'usure
AU2016223359B2 (en) * 2015-02-23 2021-03-18 Metalogenia Research & Technologies S.L Device for attaching a wear or protection element to a shovel of a soil-shifting machine and corresponding attachment method and wear or protection system
AU2017224039B2 (en) * 2016-02-23 2020-04-09 Metalogenia Research & Technologies S.L. Locking device for securing a wear element in a support in an earth moving machine

Also Published As

Publication number Publication date
AU2020255269A1 (en) 2021-11-11
CL2021002451A1 (es) 2022-05-06
CA3135312A1 (fr) 2020-10-08
CA3135312C (fr) 2023-10-10
WO2020201418A1 (fr) 2020-10-08
ZA202106676B (en) 2023-06-28
CN113646490B (zh) 2023-07-21
BR112021019851A2 (pt) 2022-01-18
CN113646490A (zh) 2021-11-12
PE20212020A1 (es) 2021-10-18
ES2944715T3 (es) 2023-06-23
WO2020201587A1 (fr) 2020-10-08
EP3947832A1 (fr) 2022-02-09
MX2021012083A (es) 2021-11-03

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