EP3213870B1 - Outil d'impact rotatif et ses utilisations - Google Patents

Outil d'impact rotatif et ses utilisations Download PDF

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Publication number
EP3213870B1
EP3213870B1 EP17158516.9A EP17158516A EP3213870B1 EP 3213870 B1 EP3213870 B1 EP 3213870B1 EP 17158516 A EP17158516 A EP 17158516A EP 3213870 B1 EP3213870 B1 EP 3213870B1
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EP
European Patent Office
Prior art keywords
anvil
rotary impact
impact tool
hammer
tool according
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.)
Not-in-force
Application number
EP17158516.9A
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German (de)
English (en)
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EP3213870A1 (fr
Inventor
Filip VANELSTRAETE
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Fve Consulting bvba
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Fve Consulting bvba
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Priority to PL17158516T priority Critical patent/PL3213870T3/pl
Publication of EP3213870A1 publication Critical patent/EP3213870A1/fr
Application granted granted Critical
Publication of EP3213870B1 publication Critical patent/EP3213870B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes

Definitions

  • the present invention relates to the field of tools used to loosen or fasten nuts or bolts, and in particular to rotary impact tools and the use thereof.
  • An impact wrench may consist of an assembly in which an output shaft or anvil is struck by a rotating mass or hammer.
  • the output shaft is coupled to a fastener to be tightened or loosened, and each strike of the hammer on the anvil applies torque to the fastener.
  • An impact wrench can thus deliver a high torque to the fastener without having to secure the tool to a fixed structure in order to absorb a corresponding reaction torque (as would be the case with a conventional non-impact fastener driver).
  • WO 2012/138721 A2 discloses a generally hollow rotary impact device for use with an impact wrench, the rotary impact device having an annular exterior surface and including an input member (for receiving the shaft of the impact wrench), an output member (for engaging with the nut or bolt to be acted upon), and an inertia member (for increasing the torque of the rotary impact device).
  • the hollow rotary impact device disclosed in WO 2012/138721 A2 could be used in cases where part of the bolt or threaded rod protrudes from the nut to be fastened or loosened, provided that it has a sufficient length to receive the protruding end of the bolt or the threaded rod.
  • the rotary impact device would need to have a sufficiently heavy inertia member to compensate the spring effect associated with the increased length of the rotary impact device. It is a disadvantage of this approach that the rotary impact device becomes increasingly heavy and cumbersome to handle with increasing operating length.
  • a rotary impact tool comprising: a fastener engaging element mounted on a rotatable shaft; and a drive mechanism arranged to strike a hammer element onto an anvil; wherein said drive mechanism, said hammer element, and said anvil are arranged in a housing; wherein said hammer element, said anvil, and said rotatable shaft are configured to be rotatable around a common axis; wherein said anvil is connected to said rotatable shaft so as to impart a torque pulse onto said rotatable shaft upon being struck by said hammer element; wherein said hammer element and said anvil have a hollow core extending around said common axis; wherein said housing, said rotatable shaft and said fastener engaging element comprise a through hole communicating with said hollow core; and wherein said hollow core and said through hole are arranged to receive an end of a threaded rod bearing a fastener that is meant to receive said torque pulse.
  • An increase of energy build-up in the socket-shaft combination by elastic deformation of the latter can thus be avoided.
  • the aforementioned energy build-up is further reduced by the increased area moment of inertia to mass ratio of the hammer-anvil combination, which results from shaping them with a hollow core.
  • the present invention is inter alia based on the insight of the inventor that generating high torque using a light inexpensive handheld power tool requires the socket-shaft combination to be as short as possible, as any energy absorbed by elastic deformation of the socket-shaft combination must be considered as "lost" from the point of view of energy transmission to the fastener.
  • the present invention is also based on the insight of the inventor that the efficiency of the tool can be improved by increasing the area moment of inertia of the anvil/hammer combination, which is achieved herein by shaping them so as to have a hollow core.
  • the present invention is further based on the insight of the inventor that by providing a through hole in the rotatable shaft and the fastener engaging element, a protruding end of a bolt or threaded rod can pass through them.
  • the rotary impact tool according to the present invention further comprises means for receiving mains electric power, and said drive mechanism comprises an electrical motor powered by said mains electric power.
  • the tool can be used wherever mains electric power is available, which includes typical indoor settings and professionally equipped outdoor building sites.
  • the means for receiving mains electric power may comprise a power cord with a suitable plug or a socket for receiving such a power cord.
  • the electrical motor may operate on mains power that has been transformed by a suitable transformer.
  • the rotary impact tool according to the present invention further comprises a battery, and said drive mechanism comprises an electrical motor powered by said battery.
  • the electrical motor operates on a rotor axis that is oriented at an angle relative to the common axis or the electrical motor operates on a rotor axis that is at a distance from the common axis, and a gearing mechanism transmits power from the electrical motor to the rotatable shaft.
  • the rotation can be generated by a standard electrical motor, which is arranged inside the tool's housing in such a way that it does not impede the passing through of the free rod end on which the fastener to be acted on is mounted.
  • the electrical motor has a hollow rotor, and the rotor axis coincides with the common axis.
  • the rotatable shaft and the hammer element are arranged such that axial travel of the hammer element relative to the rotatable shaft allows the hammer element to disengage from the anvil after impact, and to start a new impact cycle.
  • This embodiment may be implemented by configuring the hammer element and the anvil in a "Schodeberg"-arrangement. It is an advantage of this arrangement that it allows the rotary impact tool to continue to operate without interruption of manual intervention after each impact.
  • the hammer element is equipped with a clutch arranged to move an impact surface of the hammer element in and out of the path of the anvil.
  • This embodiment may be implemented by configuring the hammer element and the anvil in a "Maurer"-arrangement. It is an advantage of this arrangement that it allows the rotary impact tool to continue to operate without interruption of manual intervention after each impact.
  • the fastener engaging element is a snap-on mechanism adapted to receive a removable socket.
  • the socket is easily applicable and removable from the anvil member, and allows the use of the tool with different sockets for different sizes and shapes of bolts or nuts.
  • the rotary impact tool is used to loosen a nut from a threaded rod that is arranged to hold formwork in place, after curing or partial curing of concrete poured inside a space defined by said formwork, wherein an end of said threaded rod is passed through said through hole.
  • the method can be applied with a handheld tool, without requiring the tool to be attached to a fixed structure to absorb a corresponding reaction torque.
  • Figure 1 illustrates a rotary impact tool according to the prior art.
  • Its socket 4 has a recess or indentation corresponding to the shape of the nut 1 on which it is designed to act, allowing the socket 4 to interact with the nut 1 and apply intermittent fastening or loosening torque on the nut 1 .
  • the socket 4 fits onto the anvil member 6 through a square indentation.
  • the anvil member 6 is hammered upon repeatedly using a cylindrical hammer (not shown), driven by a motor through a drive shaft.
  • a hammer shifting mechanism allows axial travel of the hammer relative to the drive shaft between two successive blows of the hammer on the anvil member 6 .
  • Figure 3 illustrates an anvil of the "Schodeberg” type, known from US patent no. 2,712,254 to Carl T. Schodeberg .
  • Figure 4 illustrates an anvil of the "Maurer” type, known from US patent no. 3,361,217 to Spencer B. Maurer .
  • the rotary impact tool comprises: a fastener engaging element, such as a socket mounted on a rotatable shaft; and a drive mechanism arranged to strike a hammer element onto an anvil; wherein said drive mechanism, said hammer element, and said anvil are arranged in a housing; wherein said anvil is connected to said rotatable shaft so as to impart a torque pulse onto said rotatable shaft upon being struck by said hammer element; and wherein said housing, said rotatable shaft and said fastener engaging element comprise a through hole arranged to receive an end of a threaded rod bearing a fastener that is meant to receive said torque pulse.
  • a fastener engaging element such as a socket mounted on a rotatable shaft
  • a drive mechanism arranged to strike a hammer element onto an anvil
  • said drive mechanism, said hammer element, and said anvil are arranged in a housing
  • said anvil is connected to said rotatable shaft so as to impart a torque pulse onto
  • the "hammer element” as referred to herein comprises a hammer, i.e. an element with a surface designed and arranged to strike the anvil.
  • the hammer element may further comprise additional components, such as a hammer cage that guides the movement of the hammer (see in particular the "Maurer” mechanism as described in more detail below).
  • the high torque output is obtained by accelerating a rotating mass (the hammer) so as to store kinetic energy in it, and then delivering that energy to an anvil by impacting it.
  • the anvil is connected to the rotatable shaft so as to impart a torque pulse onto the rotatable shaft upon being struck by the hammer element.
  • the fraction of the received kinetic energy that is absorbed as elastic deformation of the anvil-shaft combination is kept to a minimum by designing them to be short and rigid.
  • the anvil and shaft are preferably designed to have a cross section with a large area moment of inertia; this is achieved at least in part in the present invention by providing the anvil with a hollow core.
  • Figure 5 presents a perspective view of a rotary impact tool 3 according to the present invention, as implemented in an exemplary housing design, shown in a typical use situation.
  • the tool 3 may be used for loosening or fastening of a nut, bolt or similar fasteners on a bolt or threaded rod 2 , a substantial part of which protrudes from the nut.
  • the rotary impact tool 3 of the present invention has a hollow fastener engagement element (or socket) 4, hammer 5 and anvil member 6; i.e ., a through hole (a bore or a generally tunnel-shaped orifice) is arranged so as to allow the rod 2 to pass through it and the socket 6 to reach the nut 1 .
  • a nut 1 is present on a threaded tie rod or bolt 2 , protruding over a substantial length L beyond the nut 1 .
  • the rotary impact tool 3 has an integrated or snap-on socket 4 .
  • the socket 4 has an indentation corresponding to the shape of the nut 1 on which it is designed to act, allowing the socket 4 to interact with the nut 1 and apply intermittent fastening or loosening torque on the nut 1 . If it is a snap-on type socket, it is easily applicable and removable from the anvil member 6 , for instance by means of a ball/spring locking mechanism as known to persons skilled in the art, and allows the use of the tool with different sockets for different sizes and shapes of bolts or nuts.
  • the hollow hammer and anvil member (not shown in Figure 5 ) allow the tie rod or bolt 2 to protrude significantly beyond the nut 1 , while the very short and hollow socket/anvil combination ensures high torque transmission of the rotary impact tool 3 to the nut 1 .
  • the nut 1 can have various shapes such as hexagonal, square, rectangular, polygonal, winged with one or more wings, etc. Without loss of generality, Figure 5 and the subsequent figures only illustrate a nut 1 having a hexagonal 3-winged shape and corresponding sockets, but the skilled person will appreciate that the same principle applies to all shapes of nuts, bolts or similar fasteners, and their corresponding sockets.
  • the rotary impact tool is integrated in a hand-held housing.
  • the housing may comprise a substantially cylindrical main body, whose axis is oriented along the axis of rotation of the shaft of the fastener engagement element.
  • a grip portion may be attached to the main body, e.g. a grip of the pistol grip type, allowing a person to hold the tool and to operate an activation switch with the same hand.
  • the activation switch activates the drive mechanism.
  • a further switch may be provided to alternate between clockwise and counterclockwise operation of the tool.
  • the rotatable shaft and the fastener engaging element comprise a through hole arranged to receive an end of a threaded rod bearing a fastener that is meant to receive the torque pulses. If any part of the housing of the rotary impact tool is aligned with the rotatable shaft, the through hole must run through the relevant portion of the housing and other components must be arranged to stay clear of the through hole, to allow the protruding end of the bolt or rod to pass through the entire tool. In other words, the through hole becomes a tunnel through the entire tool, allowing the fastener to be accessed by the fastener engaging element.
  • the components of the rotary impact tool according to the present invention are arranged in such a way that only the shaft, and the socket lie in the path of the threaded rod, and only these elements (and the walls of the enclosure lying along the same axis) must be provided with suitable bores.
  • the hammer is driven by a motor, hydraulic, pneumatic or electrical (connected to mains or battery-powered), through a gearing mechanism.
  • the alignment of the motor can be sideways or angled (removed from the axis of the rotating shaft) or alternatively a motor with a hollow rotor can be used (the hollow core surrounding the axis of the rotating shaft).
  • a battery-operated unit with a light electrical motor is preferred, as it allows the tool to be used autonomously.
  • the reaction torque i.e. the torque to be absorbed by the person operating and holding the tool, is kept to a minimum.
  • the driving mechanism drives a cylindrical hammer that has one or more impact surfaces. These impact surfaces impact the anvil, which is arranged to transmit the impact torque via the shaft and the socket.
  • the shaft has a first helical groove and the hammer has a second helical groove.
  • a ball is received in the first and second helical grooves to rotationally couple the hammer to the shaft and permit axial travel of the hammer relative to the shaft. The axial travel of the hammer relative to the shaft allows the hammer to disengage from the anvil after impact, and to start a new impact cycle. Further details may be found in the literature on this topic.
  • the driving mechanism drives a cage member within which is pivotally mounted a swinging hollow hammer member.
  • An output shaft extends through the cage member and through the hollow hammer member and includes forward and reverse impact anvil surfaces.
  • the pivoting point of the hammer element does not coincide with the rotation axis of the output shaft, such that the hammer will swing in respect to the cage as it rotates with the cage.
  • the forward impact jaw on the hammer's internal surface is moved in and out of the path of the anvil jaw on the output shaft by cam action and during an impact blow the inertia of the rotating hammer member acts as automatic means to hold the impact jaw in engagement with the anvil jaw. Further details may be found in the literature on this topic.
  • FIGS 6-9 illustrate an embodiment of the rotary impact tool according to the present invention, based on a "Schodeberg" type arrangement of hammer and anvil.
  • the hollow hammer 5 has a helical groove and is driven by a hydraulic, electrical or pneumatic motor 7 through a cylindrical drive shaft 8 with similar helical groove and a gearing mechanism 9 .
  • the position and alignment of the motor 7 is indicative only and can be positioned and aligned differently than shown in the drawings, without affecting the principles as set forth above.
  • a motor with a hollow rotor can be applied.
  • the improved rotary impact tool furthermore comprises a housing 10 , and a hammer shifting mechanism of the "Schodeberg" type, wherein the cylindrical drive shaft 8 , the anvil member 6 , and the hammer 5 are made hollow.
  • the hammer shifting mechanism allows axial travel of the hammer relative to the hollow drive shaft between two successive blows of the hammer on the anvil member. Further details about the hammer shifting mechanism can be found in the relevant literature, including the aforementioned patent US 2,712,254 , which is incorporated by this reference for this purpose.
  • Figure 8 presents two views of the anvil-shaft combination for use in an embodiment of the present invention using the "Schodeberg” mechanism.
  • Figure 8a shows the side of the impact surfaces upon which the hammer element acts.
  • the impact surfaces are formed as two protrusions emerging from a disc-shaped body. While the use of two impact protrusions is preferred for symmetry reasons, the skilled person will appreciate that the arrangement can also operate with a single impact protrusion, or a larger number of impact protrusions.
  • the impact surfaces are arranged on a beam-shaped body, as shown in Figure 3 .
  • the disc-shaped body as shown in Figure 8 has the specific advantage that it provides a higher area moment of inertia, and thus more rigidity against elastic deformation. This design further promotes the rapid distribution of force gradients over a larger area, such that the maximum material tensions are reduced, which improves the durability of the tool.
  • Figure 8b illustrates an exemplary shape of a socket.
  • the illustrated configuration can be used with a wingnut having three wings.
  • Figure 9 illustrates another exemplary shape of a socket, to be used with a hexagonal nut.
  • a socket of the illustrated type could be used as a snap-on accessory for use with hexagonal nuts such as those used in the automotive industry (e.g., for removing the wheels of a car or truck from their axles).
  • Figures 10-12 illustrate an embodiment of the rotary impact tool according to the present invention, based on a "Maurer” type arrangement of hammer and anvil.
  • Figure 10 provides a cross-section of the rotary impact tool, as seen in a vertical plane containing the common rotation axis.
  • Figure 11 schematically illustrates the modified "Maurer” arrangement, including a hammer 5 and anvil member 6 , wherein the anvil member 6 is made hollow. Further details about the "Maurer” arrangement can be found in the relevant literature, including the aforementioned patent US 3,361,217 , which is incorporated by this reference for this purpose.
  • Figure 11 presents a cross-section of an embodiment of the rotary impact tool according to the present invention using the "Maurer" arrangement.
  • a cylindrical housing comprising the hammer element consisting of a rotating hammer cage, which contains the pivoting hammer.
  • the shape of the hammer presents two lobs that impact the anvil.
  • the anvil is shaped as a hollow shaft with a protruding surface. It is typical of this arrangement that the hammer disengages from the anvil after having hit it, by pivoting around its upper hinge. In this way, the hammer element can immediately continue rotating and start a new impact cycle.
  • Figure 12a illustrates the hollow-core anvil with an exemplary socket 4 , as seen from the side of the socket.
  • a socket of the illustrated type could be used as a snap-on accessory for use with hexagonal nuts such as those used in the automotive industry (e.g., for removing the wheels of a car or truck from their axles).
  • Figure 12b illustrates the hollow-core anvil with another exemplary socket, as seen from the side of the socket.
  • the illustrated configuration can be used with a wingnut having three wings.
  • Modular formwork panels typically consist of a metal structure (e.g., a steel frame) and surfaces of wood, wood derivatives, or plastics. They typically have a width of 1.20 m, and are erected side by side to define the surfaces of the concrete structure that is to be formed.
  • the formwork elements are erected so as to face each other and (usually horizontally) interconnected by steel threaded rods known as formwork tie rods, having a length of e.g. 1 m.
  • the formwork tie rods are sheathed by a plastic tube that extends from one formwork element to the opposing formwork element, and the ends of the rod that protrude from the formwork are secured by nuts.
  • a typical nut used for this purpose is the formwork wingnut shown in Figure 13 . It has a traditional polygonal (e.g. hexagonal) prism-shaped body with a threaded bore, an optional large disc-shaped flange that contacts the outer surface of the formwork, and additionally a pair of wide-spaced wings suitable for being hit with a hammer.
  • the formwork elements must withstand a considerable hydrostatic pressure, which is directed outwards and pushes the outer surface of the formwork elements against the nuts.
  • the nuts will become extremely tight by the time they can be removed to tear down the formwork, when the concrete has undergone a sufficient degree of curing.
  • the nuts are removed by hitting them (in particular the wings) with a hammer.
  • the rotary impact tool according to the present invention may advantageously be used to loosen a nut from a threaded rod that is arranged to hold formwork in place.
  • the rotary impact tool according to the present invention has a through hole, the protruding end of the threaded rod may be passed through the through hole, allowing the fastener engaging means (i.e., the socket that engages with the main body of the nut) to reach the nut.
  • the rotary impact tool may then be operated to loosen the nut in a convenient and ergonomically safe manner, requiring little strength, and taking significantly less time than the traditional method.
  • the through hole in the rotary impact tool must have a suitable size to accommodate the protruding end of the threaded rod.
  • the through hole diameter must be at least 12 mm, 17 mm, and 24 mm, respectively, to be increased with a sufficient margin to allow the rod to easily pass through the through hole (e.g. 2 mm extra in diameter).
  • the rotary impact tool according to the invention preferably delivers a torque of at least 1350 Nm. More preferably, the rotary impact tool according to the invention delivers a torque of at least 2500 Nm, which would allow the tool to be used in situations where concrete volumes of greater height (resulting in higher hydrostatic pressure levels) are poured.
  • the rotary impact tool according to the present invention may advantageously be used to fasten a nut on a threaded rod or bolt.
  • the rotary impact tool according to the present invention has a through hole, the protruding end of the threaded rod or bolt may be passed through the through hole, allowing the fastener engaging means (i.e., the socket that engages with the main body of the nut) to reach the nut.
  • the rotary impact tool may then be operated to fasten the nut in a convenient manner, requiring little strength, and taking significantly less time than the traditional method.
  • the torque that can be imparted by the rotary impact tool according to the present invention may be very high, embodiments of the rotary impact tool of the present invention may be equipped with a torque limiting mechanism to provide the fasteners from being damaged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (10)

  1. Outil rotatif à impacts (3), comprenant :
    - un élément de mise en prise de pièce de fixation (4) monté sur un arbre pouvant être mis en rotation (8); et
    - un mécanisme d'entraînement agencé pour frapper un élément formant marteau (5) sur une enclume (6);
    dans lequel ledit mécanisme d'entraînement, ledit élément formant marteau et ladite enclume sont agencés dans un logement (10) ;
    dans lequel ledit élément formant marteau, ladite enclume et ledit arbre pouvant être mis en rotation sont configurés pour pouvoir être mis en rotation autour d'un axe commun ; dans lequel ladite enclume est reliée audit arbre pouvant être mis en rotation de façon à conférer une impulsion de couple sur ledit arbre pouvant être mis en rotation lorsqu'il est frappé par ledit élément formant marteau ;
    caractérisé en ce que ledit élément formant marteau et ladite enclume ont une âme creuse s'étendant autour dudit axe commun ;
    en ce que ledit logement, ledit arbre pouvant être mis en rotation et ledit élément de mise en prise de pièce de fixation comprennent un trou traversant communiquant avec ladite âme creuse ;
    et ce que ladite âme creuse et ledit trou traversant sont agencés pour recevoir une extrémité d'une tige filetée (2) portant une pièce de fixation qui est faite pour recevoir ladite impulsion de couple.
  2. Outil rotatif à impacts selon la revendication 1, comprenant en outre un moyen pour recevoir de l'énergie électrique du secteur, dans lequel ledit mécanisme d'entraînement comprend un moteur électrique (7) alimenté par ladite énergie électrique du secteur.
  3. Outil rotatif à impacts selon la revendication 1 ou la revendication 2, comprenant en outre une batterie, dans lequel ledit mécanisme d'entraînement comprend un moteur électrique alimenté par ladite batterie.
  4. Outil rotatif à impacts selon la revendication 2 ou la revendication 3, dans lequel ledit moteur électrique fonctionne sur un axe de rotor qui est orienté à un angle relatif audit axe commun ou ledit moteur électrique fonctionne sur un axe de rotor qui est à une certaine distance dudit axe commun, et dans lequel un mécanisme d'engrenages (9) transmet la puissance provenant dudit moteur électrique audit arbre pouvant être mis en rotation.
  5. Outil rotatif à impacts selon la revendication 2 ou la revendication 3, dans lequel ledit moteur électrique a un rotor creux et dans lequel ledit axe de rotor coïncide avec ledit axe commun.
  6. Outil rotatif à impacts selon l'une quelconque des revendications précédentes, dans lequel ledit arbre pouvant être mis en rotation et ledit élément formant marteau sont agencés de sorte qu'un déplacement axial dudit élément formant marteau par rapport audit arbre pouvant être mis en rotation permet audit élément formant marteau de se dégager de l'enclume après impact et de commencer un nouveau cycle d'impacts.
  7. Outil rotatif à impacts selon l'une quelconque des revendications précédentes, dans lequel ledit élément formant marteau est équipé d'un embrayage agencé pour déplacer une surface d'impact dudit élément formant marteau dans et hors du chemin de ladite enclume.
  8. Outil rotatif à impacts selon l'une quelconque des revendications précédentes, dans lequel ledit élément de mise en prise de pièce de fixation est un mécanisme encliquetable conçu pour recevoir une douille amovible.
  9. Utilisation de l'outil rotatif à impacts selon l'une quelconque des revendications précédentes pour desserrer ou serrer un écrou sur une tige filetée, dans laquelle une extrémité de ladite tige filetée est passée à travers ledit trou traversant.
  10. Utilisation selon la revendication 9, dans laquelle l'outil rotatif à impacts est utilisé pour desserrer un écrou d'une tige filetée qui est agencée pour maintenir un coffrage en place, après durcissement ou durcissement partiel du béton versé à l'intérieur d'un espace défini par ledit coffrage, dans laquelle une extrémité de ladite tige filetée est passée à travers ledit trou traversant.
EP17158516.9A 2016-03-02 2017-02-28 Outil d'impact rotatif et ses utilisations Not-in-force EP3213870B1 (fr)

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Application Number Priority Date Filing Date Title
PL17158516T PL3213870T3 (pl) 2016-03-02 2017-02-28 Obrotowe narzędzie udarowe i jego zastosowanie

Applications Claiming Priority (1)

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BE2016/5156A BE1023584B1 (nl) 2016-03-02 2016-03-02 Draaiend impactgereedschap en gebruiken daarvan

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EP3213870A1 EP3213870A1 (fr) 2017-09-06
EP3213870B1 true EP3213870B1 (fr) 2018-12-26

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EP (1) EP3213870B1 (fr)
BE (1) BE1023584B1 (fr)
ES (1) ES2717540T3 (fr)
PL (1) PL3213870T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019079560A1 (fr) 2017-10-20 2019-04-25 Milwaukee Electric Tool Corporation Outil à percussion
TWI793208B (zh) 2017-11-10 2023-02-21 美商米沃奇電動工具公司 可旋轉手工具及緊固件
CN214723936U (zh) 2018-01-26 2021-11-16 米沃奇电动工具公司 冲击工具
CN114654431B (zh) * 2020-12-24 2024-08-02 喜利得股份公司 用于冲击式工具的扭矩增强装置

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Also Published As

Publication number Publication date
PL3213870T3 (pl) 2019-07-31
ES2717540T3 (es) 2019-06-21
BE1023584B1 (nl) 2017-05-09
EP3213870A1 (fr) 2017-09-06

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