EP4221926A1 - Outil pour machine-outil mobile - Google Patents

Outil pour machine-outil mobile

Info

Publication number
EP4221926A1
EP4221926A1 EP21778126.9A EP21778126A EP4221926A1 EP 4221926 A1 EP4221926 A1 EP 4221926A1 EP 21778126 A EP21778126 A EP 21778126A EP 4221926 A1 EP4221926 A1 EP 4221926A1
Authority
EP
European Patent Office
Prior art keywords
tool
shank
channel
suction
shaft
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
EP21778126.9A
Other languages
German (de)
English (en)
Inventor
Arno Glaser
Roland Foser
Werner Kleine
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP4221926A1 publication Critical patent/EP4221926A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
    • B23B51/0003—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B28D1/146—Tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/75—Stone, rock or concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/68—Drills with provision for suction

Definitions

  • the invention is based on a tool for a mobile machine tool, in particular a hand-held machine tool, for working rock or mineral materials, comprising a shaft and a tool head, with a suction channel for transporting rock dust being formed at least along part of the shaft.
  • Tools of this type make it possible to remove rock dust produced during the processing of the rock or the mineral materials directly from a processing area of the tool head. Such a tool is therefore used, for example, in situations in which particularly high demands are placed on the cleanliness of an area adjacent to the machining area.
  • the object of the present invention is therefore to offer a tool of the generic type that enables particularly economical use.
  • a tool for a mobile machine tool in particular a hand-held machine tool, for machining rock or mineral materials, comprising a shank and a tool head, with a suction channel for transporting at least along part of the shank Rock dust is formed, wherein the tool head and a channel element of the tool arranged longitudinally at least along a part of the shank can be and/or are detachably coupled to the shank.
  • the suction channel can be and/or can be formed together by the channel element and the shaft. It is therefore not necessary, for example, to pierce the length of the shank—and thus in a particularly costly manner.
  • the channel element can be pushed and/or pushed onto the shaft.
  • the tool head can be coupled and/or coupled to the shank. This also results in a very simple, quick and inexpensive assembly of the entire tool.
  • the tool according to the invention is also characterized by a particularly flexible usability.
  • the tool head can be exchanged as required. Worn tool heads can also be easily replaced. It is therefore no longer necessary to dispose of the entire tool and to procure a completely new tool.
  • the overall service life can be extended by the tool according to the invention, so that costs can also be further reduced as a result.
  • the tool according to the invention can be quickly and inexpensively adapted to different sizes and/or lengths, in particular by replacing the tool head and/or by replacing the shaft and/or the channel element.
  • a large working area can be covered with one shank thanks to various tool heads with different diameters.
  • the investment costs can also be reduced to a particular degree compared to known tools.
  • the tool can be a drilling tool, for example a hammer drilling tool, a chisel tool or the like.
  • the tool is particularly preferred for use with a drill, a hammer drill, a Chisel machine or the like set up. It is also conceivable, in particular by changing the tool head, to use the tool both as a drilling tool and as a chiseling tool, depending on the application. It can also be set up for processing natural or artificial rocks, for example rocks containing cement.
  • the tool and the mobile machine tool with which the tool is to be used can particularly preferably be set up for use in the construction sector, for example in structural engineering and/or civil engineering.
  • the tool in particular the tool head, can have a diameter of at most 50 mm, preferably at most 40 mm.
  • the tool can have an overall length of less than 2 m, in particular less than 1 m.
  • the mobile machine tool can be portable, in particular it can have a weight of less than 25 kg.
  • the mobile power tool can be or include a hand power tool. It can also be or include a construction robot, in particular set up for work in building construction and/or civil engineering.
  • Coupled and/or “coupled” can also be understood to mean a coupling type or coupling that fixes one element to another element in at least one direction.
  • the channel element can be and/or can be detachably coupled to the shaft in such a way that although it cannot be removed radially from the shaft, it can be and/or is arranged to be displaceable along a longitudinal direction of the shaft, for example.
  • the channel element can be pushed and/or pushed onto the shaft.
  • the shank may have a cylindrical or at least a substantially cylindrical shape.
  • the tool head has an inlet channel.
  • the inlet channel can connect a tool tip, ie for example an end of the tool head equipped with at least one cutting edge, to the suction channel.
  • rock dust produced at the tool tip can be routed through and/or along the tool head to the suction channel.
  • the inlet channel can be inside the tool head and/or on be formed at least one outside of the tool head.
  • the inlet channel can be designed as an inlet groove or can comprise at least one inlet groove.
  • the tool in particular the tool head, can be made of a hard metal or at least have a hard metal.
  • the tool head can have tungsten carbide, for example.
  • the tool, in particular the tool head can also have an alloy.
  • the tool, in particular the tool head can also have diamond.
  • a side channel can be formed between the channel element and the tool head.
  • the side channel can be ring-shaped or at least essentially ring-shaped. Such a side channel can make it possible for rock flour to be sucked off around the tool head and guided into the suction channel.
  • the tool can have a suction funnel which is set up to direct rock dust flowing in from the direction of the tool head into the suction channel.
  • the suction funnel can be designed as a separate element.
  • the suction funnel can also form part of the channel element.
  • the suction funnel can be designed in one piece on the channel element.
  • the suction funnel can be used particularly advantageously for tools with a large diameter, for example with a relatively large diameter of the tool head.
  • the cross-sectional area of the suction channel in the area of the shank, in particular in an end area of the shank, can increase in a direction pointing away from the tool head.
  • the channel element can be easily mounted on the shaft if it is designed in several parts and/or can be opened up, in particular if it can be opened up on the longitudinal side.
  • the channel element can have at least two half-shells.
  • the channel element can be rotatably arranged and/or arranged, in particular mounted, on the shaft. Alternatively, it is conceivable to secure the channel element at least against relative rotation relative to the shaft or to completely fix the channel element on the shaft.
  • the suction channel can extend at least essentially over the entire shaft on the peripheral side.
  • the suction channel can in particular be ring-shaped or at least essentially ring-shaped, in particular encompassing the circumference of the shaft.
  • the channel element is designed as a cover element that at least partially covers the shaft.
  • the tool has several channel elements.
  • the plurality of channel elements can be arranged and/or arranged to be distributed uniformly over the circumference of the shaft.
  • At least one of the channel elements can be made of a plastic.
  • the channel element can be formed from an elastic material or can have such a material.
  • the channel element can be an elastomer or can have one. It can also be made of a plastic, a rubber and/or a metal-containing material, for example steel, or at least have such a material.
  • the suction channel formed with the channel element can be cleaned particularly easily, particularly in the case of plastic or rubber.
  • the channel element and/or the shaft can have at least one fastening means in order to fasten the channel element to the shaft.
  • the shank can have at least one suction groove, through which part of the suction channel is formed and/or can be formed. This is particularly favorable if the channel element is designed as a cover element. Then the shaft and the channel element designed as a cover element can form the suction channel.
  • the suction groove and/or the channel element can be equipped with a dovetail profile. Due to the dovetail profile, the channel element can be detachably coupled and/or coupled to the shaft.
  • the tool can have at least one spacer for maintaining a suction space between the shaft and the channel element.
  • the spacer can be formed, for example, on an inside of the channel element. It is also conceivable that the spacer is formed on the shaft. It can preferably be made of an abrasion-resistant material and/or have a coating, in particular an abrasion-resistant one.
  • the spacer can be in the form of knobs. Alternatively or additionally, it can also be spherical or roller-shaped and/or have a partial sphere, a full sphere and/or a roller. Preferably, several, in particular at least three, spacers can be provided. The plurality of spacers can be distributed evenly over the circumference of the shank.
  • the tool head is and/or can be detachably coupled to the shank by means of a wedge, by means of at least one wedge surface and/or by means of a thread.
  • a thread its direction of rotation can be selected in such a way that the thread tightens automatically during normal use of the tool, in particular with drilling tools.
  • the tool head can be and/or can be detachably coupled to the shaft by means of a coupling pin.
  • the tool in particular the shank, can have a pin receptacle, preferably designed to be complementary to the coupling pin. At least one tolerance of the coupling pin and/or the pin receptacle can be selected in such a way that the tool head has no or at least essentially no play under load rests against the shaft without play.
  • the tool has a suction adapter and/or that the tool can be connected to a suction adapter.
  • the suction adapter can be set up to couple the suction channel to a suction device, for example a separate one, which generates a suitable negative pressure.
  • the suction adapter can also be arranged and/or arranged so that it can be detachably coupled to the tool.
  • the modularity of the tool according to the invention can also be increased further if a shank arranged at an end of the shank opposite the tool head is and/or can be detachably coupled to the shank.
  • the tool can then be adapted to different standards of insertion ends in a particularly simple manner. This can make it easier to use the tool with different mobile machine tools. This also enables a user of the tool to save considerable costs over the service life of the tool.
  • the pin receptacle can extend into the tool head or through the tool head.
  • the pin receptacle can also extend through the channel element. In this case, it is advisable if the channel element is arranged and/or can be arranged in a rotationally fixed manner on the shaft.
  • the coupling pin can then reach through the channel element and through the tool head and into the shank or can be arranged accordingly.
  • the tool head can be slipped onto the shank.
  • the end of the shank facing the tool head can be tapered. It can preferably be designed in the shape of a wedge or at least have at least one wedge surface.
  • FIG. 1 shows a perspective representation of a tool with a suction adapter
  • FIG. 2 shows a longitudinal sectional view of a detail of a further tool
  • FIG. 6 shows a longitudinal sectional view of a detail of a tool in which the tool head has a plurality of entry channels
  • FIG. 7 shows a longitudinal sectional view of a detail of a tool in which several channel elements are designed as cover elements and
  • Fig. 8 is a cross-sectional view of the tool of Fig. 7.
  • the tool 10 is designed as a rock drill. It can be used with a mobile machine tool to machine rock or mineral materials.
  • the tool 10 comprises a shank 12 and a tool head 14.
  • the tool head 14 is detachably coupled to the shank 12 in a manner described in more detail below.
  • a suction channel 16 for removing rock dust from the area of the tool head 14 is formed along the shank 12 .
  • the tool 10 has a channel element 18 which extends longitudinally along the shank 12 .
  • the channel member 18 encloses the shaft 12.
  • the channel element 18 is thus designed as a sleeve element. The channel element 18 is pushed onto the shaft 12 and is thereby detachably coupled to it.
  • An insertion end 20 is formed on the shank 12 at the end of the shank 12 opposite the tool head 14 .
  • the shank 20 can, for example, correspond to the standard that is usually referred to as “SDS-Max”.
  • a suction adapter 22 is arranged adjacent to the insertion end 20 .
  • the suction adapter 22 can be connected to a suction device.
  • the suction adapter 22 is fluidically connected to the suction channel 16 .
  • Suction adapter 22 encloses shaft 12 together with channel element 18 .
  • Shaft 12 is rotatably mounted in suction adapter 22 together with channel element 18 .
  • tools 10 are presented below. Unless otherwise mentioned, these tools 10 can correspond to the exemplary embodiment described above and in particular also have one or more of the features described above. Special features of the respective exemplary embodiments are therefore explained in more detail below with priority.
  • FIG. 2 shows a section of another tool 10 in a partially sectioned longitudinal section.
  • this embodiment of the tool 10 has a coupling pin 32 which is inserted into a pin receptacle 34 of the shank 12 .
  • the coupling pin 32 is designed here as a slotted hollow pin made of spring steel. Alternatively, however, it is also conceivable to use it, for example, as a grooved pin, as a cone pin, as Form screw or at least having a thread.
  • a side channel 36 is formed between the tool head 14 and a channel element 18 .
  • the side channel 36 is ring-shaped. It encloses part of the end of the shank 12 facing the tool head 14.
  • the side channel 36 can have a width of at least 2 mm, preferably at least 3 mm.
  • rock dust can be sucked from the tool tip 24 with the cutting edges 26 past the tool head 14 and enter the suction channel 16 .
  • the cross-sectional area of the suction channel 16 increases in the area of the shaft 12 starting from the side channel 36 to the remaining suction channel 16 in the direction pointing away from the tool head 14 .
  • FIG 3 shows a detail of another tool 10 with a suction funnel 38 in a further partially sectioned longitudinal sectional view.
  • the suction funnel 38 is part of a channel element 18. It is located at the end of the channel element 18 facing the tool head 14.
  • FIG. 4 shows a partially sectioned longitudinal section of a detail of a further exemplary embodiment of a tool 10 which also has a suction funnel 38 .
  • the suction funnel 38 is formed as a separate element. It can be attached and/or plugged onto a channel element 18 .
  • FIG. 5 shows a further partially sectioned longitudinal sectional view of a section of a further tool 10.
  • the suction funnel 38 can also be set up to extend a channel element 18 at least over part of a tool head 14 in a direction parallel to a shaft 12 .
  • the suction effect of a negative pressure prevailing in a suction channel 16 can be improved. This is useful, for example, in the case of relatively large tool heads 14 .
  • Fig. 6 shows a longitudinal sectional view of another tool head 14 in connection with a shank 12, which is only partially shown in Fig. 6.
  • inlet channels 40 are formed in the tool head 14. It is also conceivable to provide only a single entry channel 40 .
  • the inlet channels 40 run through the tool head 14. They connect a tool tip 24 of the tool head 14 to a suction channel 16.
  • the suction channel 16 is designed as a central longitudinal opening in the shaft 12 .
  • the shaft 12 is formed from two half-shells.
  • the two half-shells can be detachably coupled to one another by means of a connecting means, for example a strap or a latching arrangement, which is not shown in FIG. 6 for reasons of simplification.
  • a connecting means for example a strap or a latching arrangement, which is not shown in FIG. 6 for reasons of simplification.
  • at least one of the two half-shells simultaneously forms a channel element 18.
  • the tool head 14 is releasably coupled to the shank 12 by means of a plurality of coupling pins 32 in conjunction with pin receptacles 34 formed on the shank 12 in a complementary manner.
  • FIGS. 7 and 8 show an exemplary embodiment in which the channel elements 18 are designed as cover elements.
  • 7 shows a longitudinal sectional view of the exemplary embodiment.
  • Fig. 8 shows a cross-sectional view according to the section line VIII-VIII from Fig. 7 of this embodiment.
  • a tool head 14 which is detachably coupled to a shank 12 can again be seen.
  • the shank 12 has an at least substantially circular cross section. It is alternatively conceivable that the shank 12 has a cross-section that is not essentially circular.
  • the shank 12 can have a polygonal cross section or an at least substantially polygonal cross section.
  • Two suction channels 16 running along a longitudinal axis of the shaft 12 are formed on the circumference of the shaft 12 .
  • Two suction grooves 42 are incorporated into the shaft 12 for this purpose.
  • the suction grooves 42 are each covered by a channel element 18 .
  • the channel elements 18 are designed as cover elements that are set up to cover the suction grooves 42 .
  • the suction grooves 42 are formed in a cross-section complementary to the channel elements 18 designed as a cover element.
  • the lateral walls of the suction grooves 42 on the one hand and of the channel elements 18 on the other hand run obliquely, in particular along non-central chords.
  • the suction grooves 42 and the channel elements 18 thus have dovetail profiles, in particular designed to be complementary to one another, so that the elements 18 and 42 can be detachably coupled to one another in the manner of dovetail connections—and according to the state shown in FIGS. 7 and 8 .
  • the channel elements 18 are made of an elastic plastic. In an alternative embodiment, they are formed of resilient rubber.
  • the tool head 14 also has one or more inlet channels 40 .
  • the inlet channels 40 run flatter in the longitudinal direction of the shaft 12, so that they end in the area of the circumference of the shaft 12 and can open into the respective suction channels.
  • tool heads 14 shown in these exemplary embodiments can be combined in any way, in particular not only in the pairings shown above, with the shafts 12 shown above, if necessary with suitable adaptation of the geometries.
  • a combination of a tool head 14 with one or more inlet channels 40 with a shaft 12 with a suction funnel 38 is also conceivable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

L'invention concerne un outil (10) qui est particulièrement économique à produire et à utiliser pour une machine-outil mobile, par exemple un outil électrique à main, destinée à l'usinage de pierre ou de matières minérales, comprenant un arbre (12) et une tête porte-outil (14), un canal d'aspiration (16) étant formé au moins le long d'une partie de l'arbre (12) pour transporter la poussière de pierre. L'outil (10) est caractérisé en ce que la tête porte-outil (14) et un élément canal (18) de l'outil (10), qui est situé au moins le long d'une partie du côté long de l'arbre (12), puissent être accouplés et/ou soient accouplés amovibles à l'arbre (12).
EP21778126.9A 2020-10-02 2021-09-20 Outil pour machine-outil mobile Pending EP4221926A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20199891.1A EP3978170A1 (fr) 2020-10-02 2020-10-02 Outil pour une machine-outil mobile
PCT/EP2021/075788 WO2022069278A1 (fr) 2020-10-02 2021-09-20 Outil pour machine-outil mobile

Publications (1)

Publication Number Publication Date
EP4221926A1 true EP4221926A1 (fr) 2023-08-09

Family

ID=72744673

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20199891.1A Withdrawn EP3978170A1 (fr) 2020-10-02 2020-10-02 Outil pour une machine-outil mobile
EP21778126.9A Pending EP4221926A1 (fr) 2020-10-02 2021-09-20 Outil pour machine-outil mobile

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20199891.1A Withdrawn EP3978170A1 (fr) 2020-10-02 2020-10-02 Outil pour une machine-outil mobile

Country Status (3)

Country Link
US (1) US20240025080A1 (fr)
EP (2) EP3978170A1 (fr)
WO (1) WO2022069278A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113037A (en) * 1976-02-10 1978-09-12 Robert Bosch Gmbh Rock drill
DE102011075769A1 (de) * 2011-05-12 2012-11-15 Hilti Aktiengesellschaft Bohrer und Herstellungsverfahren
DE102018104460A1 (de) * 2018-02-27 2019-08-29 Heller Tools Gmbh Gesteins-Saugbohrer
DE102019205656A1 (de) * 2018-05-07 2019-11-07 Robert Bosch Gmbh Bohrwerkzeug

Also Published As

Publication number Publication date
EP3978170A1 (fr) 2022-04-06
WO2022069278A1 (fr) 2022-04-07
US20240025080A1 (en) 2024-01-25

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