WO2014090840A1 - Porte-outil - Google Patents

Porte-outil Download PDF

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Publication number
WO2014090840A1
WO2014090840A1 PCT/EP2013/076153 EP2013076153W WO2014090840A1 WO 2014090840 A1 WO2014090840 A1 WO 2014090840A1 EP 2013076153 W EP2013076153 W EP 2013076153W WO 2014090840 A1 WO2014090840 A1 WO 2014090840A1
Authority
WO
WIPO (PCT)
Prior art keywords
insert
axis
tool holder
recess
tube
Prior art date
Application number
PCT/EP2013/076153
Other languages
German (de)
English (en)
Inventor
Thomas Bader
Aaron Wiedner
Udo Hauptmann
Frank Fritsch
Original Assignee
Hilti Aktiengesellschaft
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 Aktiengesellschaft filed Critical Hilti Aktiengesellschaft
Priority to EP13805842.5A priority Critical patent/EP2931480A1/fr
Priority to CN201380072895.3A priority patent/CN104994998B/zh
Publication of WO2014090840A1 publication Critical patent/WO2014090840A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members

Definitions

  • the present invention relates to a tool holder for a hand-held rotary hammer or other rotary machine tools.
  • the tool holder of a hammer drill is subject to high wear due to the axially moving chiseling drill in a dusty environment. Webs or ribs, which protrude for a rotational drive of the tool in a receiving space are particularly stressed.
  • the two solutions known below use webs made of a hardened material, which resist the abrasion longer.
  • DE 199 58 342 A1 describes a tool holder for a hammer drill.
  • the tool holder has a base body with a receiving area for a grooved tool.
  • the wall of the receiving area has a recess over the entire length, is pushed into the rod from the front side of the body.
  • a part of the rod protrudes into the receiving area and forms a driving element for the tool.
  • the rod is permanently fixed in the body, preferably by a press fit.
  • the rod is made of a relative to the body comparatively hard material.
  • GB 2395158 A1 describes a tool holder for a hammer drill.
  • the tool holder has a tubular base body with a side wall, are attached to the two inserts with drive ribs.
  • a radial through hole is drilled in the side wall.
  • the through hole consists of two overlapping circular holes.
  • the insert has a pedestal complementary to the passage opening, which is permanently, e.g. by gluing, soldering or welding, is fixed in the through hole.
  • the drive rib is made of sintered carbide, which is mounted on the steel base.
  • the tool holder according to the invention for a hand tool in particular a hand-held hammer drill, has a receiving space extending around an axis for receiving a male end of a tool.
  • the receiving space is formed by a tube coaxial with the axis and an insert.
  • An inner surface of the tube forms part of a wall surface of the receiving space.
  • the tube has a recess piercing the tube along a first direction, the first direction being inclined with respect to the axis.
  • the insert is inserted along the first direction in the recess.
  • a concave inner surface of the insert forms another part of the wall surface of the receiving space.
  • the insert has a rotary driving web for rotary driving protruding from the concave inner surface to the axis.
  • An outgoing from the rotary land and extending through the axis line defines a second direction. This second direction is inclined with respect to the first direction.
  • the attachment of the insert leads to a weakening of the supporting tube.
  • a spatial separation of the weakening of the tube and the arrangement of the rotary driving web is possible and advantageous.
  • the contact surface of the insert on the tube is not limited to the dimensions of the rotary driving web, but significantly larger.
  • the torsional forces exerted on the rotary driving webs are transmitted more evenly through the insert into the pipe, which counteracts the formation of cracks.
  • the recess can pierce the tube once or twice.
  • the orientation of the recess i. the first direction, in the case of an example prismatic recess, is parallel to the surfaces of the recess.
  • orientation is defined as the connecting line through the tip and the middle of a cross section.
  • the insert is preferably prismatic, whereby a shape with any, along an axis constant cross section is called.
  • the axis corresponds to the first direction.
  • one or more surfaces of the insert may be inclined relative to the axis. This applies in particular to the surfaces pointing along the axis.
  • the parallel to the axis extending lateral surfaces on which the rotational support webs are supported are preferably to the axis and parallel to each other.
  • the cross section perpendicular to the axis may decrease monotonically along the first direction. For any arbitrary cross-section applies that this completely surrounds each subsequent in the first direction further cross-section, this is at least equal.
  • the cross section refers to the outer contour of the insert.
  • the recess is preferably complementary trained for the use. The insert can be inserted along the first direction.
  • One embodiment provides that the insert bears against a surface of the recess in the tube opposite to the second direction.
  • the surface of the recess is preferably flat.
  • the insert has a further rotary driving bar, wherein a line extending from the further rotary bar and extending through the axis defines a third direction and wherein the insert bears against the surface of the recess opposite the surface of the recess opposite to the third direction.
  • the two rotary struts are contiguous as part of the insert. The forces resulting from the torques compensate each other along the first direction, whereby the insert is held powerless centered on the axis.
  • An embodiment provides that a lateral surface of the recess in a direction which is perpendicular to the axis and perpendicular to the first direction, spaced by more than half the inner diameter of the tube from the axis.
  • the inner diameter is of course determined in an area away from the recess.
  • the tube is preferably widened in the region of the recess at least on one side on both sides, without being broken at the respective side. This side forms a radially supporting contact surface for use.
  • the concave inner surface of the insert surrounds the axis in an annular manner.
  • the insert can divide the wall surface into three annular sections, which follow one another along the axis.
  • the middle section is completely formed by the insert.
  • an inner diameter of the insert is equal to or greater than an inner diameter of the tube.
  • the insert is preferably loaded only by acting on the webs torques. Radial forces, eg due to bending moments, absorb the pipe. The insert may also partially evade the radially acting forces by sliding the insert in the recess along the first direction.
  • the insert is inserted loosely in the recess. The loose insert facilitates assembly and replacement.
  • a holder of the insert rests against a cover surface of the insert oriented along the first direction in order to hold the insert in the recess.
  • the holder is movable along the axis.
  • the holder can span the top surface, yet a locking and unlocking of the tool with axially movable locking balls is possible.
  • the holder may be formed by a spring-loaded slider for locking elements of the tool holder.
  • the locking balls may fix the insert along the first direction.
  • An embodiment provides that the insert has an exposed cover surface in which a slot extending along the axis and opening up to the receiving space is provided.
  • Fig. 1 a hammer drill
  • Fig. 2 shows a tool holder in longitudinal section in the plane II-II Fig. 3, the tool holder in longitudinal section in the plane III-III
  • Fig. 4 shows a base body of the tool holder in a longitudinal section of the plane II-II
  • Fig. 5 shows a main body of the tool holder in a longitudinal section of the plane III-II
  • Fig. 6 shows the tool holder in cross-section in the plane IV-IV
  • Fig. 7 shows the tool holder in cross-section in the plane V-V
  • Fig. 8 shows the tool holder in longitudinal section in the plane Vl-Vl offset to the axis
  • Fig. 1 shows an example of a chiseling hand tool machine schematically a hammer drill 1.
  • a user can perform the hammer drill 1 by means of a handle 2 and thereby take the hammer drill 1 by means of a system switch 3 in operation.
  • the exemplary hammer drill 1 rotates a drill 4 or another tool continuously about a working axis 5 and thereby strikes the drill 4 in the direction of impact 6 along the working axis 5 in a background.
  • the rotational movement and the impact function can be activated individually by the user.
  • An insertion end 7 of the drill bit 4 is releasably locked in a tool holder 8 of the power tool.
  • the drill bit 4 can be removed in the direction of impact 6 from the tool holder 8.
  • a primary drive of the hammer drill 1 is a motor 9, which drives a hammer mechanism 10 and an output shaft 11.
  • the output shaft 11 rotates the tool holder 8 about the axis 5.
  • the percussion mechanism 10 is, for example, a pneumatic striking mechanism 10.
  • An exciter 12 and a racket 13 are movably guided in the percussion mechanism 10 along the working axis 5, for example in a guide tube 14.
  • the exciter 12 is coupled via an eccentric 15 or a wobble finger to the motor 9 and forced to a periodic, linear movement.
  • An air spring formed by a pneumatic chamber 16 between exciter 12 and racket 13 couples a movement of the racket 13 to the movement of the exciter 12 at.
  • the racket 13 can strike directly on a striking surface of the drill bit 4 or indirectly transfer part of its pulse to the drill bit 4 via a substantially resting intermediate racket 16.
  • the hammer mechanism 10 and preferably the further drive components are arranged within a machine housing 17.
  • FIG. 2 shows the tool holder 8 of the hammer drill 1 in a first longitudinal section along the axis 5 and FIG. 3 in a longitudinal section rotated by 90 °.
  • Figures 6 to 8 show a plurality of perpendicular to the axis 5 extending cross-sections of the tool holder. 8
  • the tool holder 8 has a base body 18, via which the torque is transmitted from the motor 9 to the insertion end 7.
  • the exemplary monolithic base body 18 consists of a tube 19 and a flange 20.
  • the main body 18 is made for example of a steel tube.
  • the tube 19 and the flange 20 are concentric with the working axis 5.
  • a manually operable tool latch 21 is disposed on the tube 19 which locks an inserted into the tube 19 spigot 7.
  • a preferably manually releasable flange lock 22 is arranged around the flange 20, which rotatably couples the flange 20 with the output shaft 11.
  • the tube 19 has a substantially prismatic outer surface, which is preferably derived from a circular cylinder having an outer diameter 23. The outer surface may be withdrawn in a sector or in two diametrically opposite sectors to key surfaces 24 relative to the outer diameter 23.
  • the key surfaces 24 are preferably flat.
  • the other sectors 25 of the outer surface are preferably circular cylindrical.
  • the tube 19 defined by its radially to the axis 5 facing inner surfaces wall surfaces of a receiving space 26 for receiving the insertion end 7.
  • the inner diameter 27 of the receiving space 26 is approximately equal to the diameter of the common SDS-Einsteckendes 7 of hammer drills 4.
  • the length 28 of the tube 19 is sufficient to be able to fully absorb the SDS insertion end 7 with its locking grooves and rotary driving grooves.
  • a striking surface of the male end 7 projects slightly forward beyond the tube 19 to receive the impact of the intermediate beater 29 or beater 13.
  • the tool lock 21 has at least one locking element 30.
  • the locking elements 30 protrude partially into the receiving space 26 and can dodge for insertion and removal of the tool 4 from the receiving space 26 in the radial direction.
  • the tool lock 21 has a sleeve 31 guided on the bushing 31.
  • the bushing 31 is pushed in the locking position over the locking elements 30 such that their radial movement is inhibited and the locking elements 30 are forced into engagement with the receiving space 26.
  • the user can move the bushing 31 along the axis 5 by means of a grip sleeve 32 in order to remove the radial inhibition of the locking elements 30.
  • Examples of the locking elements 30 are balls, cylinders, pivoted pawls.
  • the exemplary tool lock 21 has two locking balls 30 as locking elements.
  • the locking balls 30 are each in a, preferably elongated to the axis 5 parallel, bearing shell 33.
  • the bearing shell 33 is open in the radial direction to the receiving space 26 so that the locking balls 30 protrude into the receiving space 26.
  • the bearing shell 33 is tapered towards the axis 5, so that the locking balls 30 can not fall into the receiving space 26.
  • the locking balls 30 may be movable in the bearing shell 33 along the axis 5.
  • the bearing shell 33 is preferably formed in the flat key surfaces 24.
  • the locking balls 30 are preferably about half of their diameter beyond the key surface 24 addition.
  • An inhibition of the locking balls 30 in the radial direction takes place through a hollow cylindrical inner surface 34 of the bush 31.
  • the bushing 31 overlaps along the axis 5 preferably only with a rear portion of the bearing shell 33.
  • the locking balls 30 can in the front portion radially completely from the receiving space 26th dodge.
  • a slider 35 holds the locking balls 30 in the rear portion, i. within the sleeve 31.
  • the slider 35 is on the tube 19 along the axis 5, relative to the sleeve 31 slidably.
  • a spring 36 pushes the slider 35 for a basic position against the bushing 31.
  • a to the bush 31 facing thrust surface 37 of the slider 35 overlaps in the radial direction at least partially with the locking balls 30.
  • the thrust surface 37 may have a concave curved, for example, Hohlkalotten-shaped contour.
  • the slider 35 is preferably formed as a tube 19 spanning the ring. The slider 35 is guided on the key surfaces 24.
  • the tool holder 8 has a rotational drive for the insertion end 7, which transmits the rotational movement of the tube 19 to the insertion end 7.
  • the rotational drive is formed by one, two or more, preferably prismatic, rotational engagement webs 38.
  • the rotary driving web 38 is aligned parallel to the axis 5.
  • the rotary driving web 38 has its largest dimension along the axis 5 and the preferably trapezoidal cross section of the rotary driving web 38 is constant along the axis 5.
  • the rotary driving bar 38 rises along a vertical direction 39 from the otherwise concave, preferably cylindrical inner surface 40 of the receiving space 26 to the axis 5.
  • the vertical direction 39 is the cylindrical geometry of the tool holder 8 in accordance with cylindrical coordinates defined as follows: the vertical
  • the vertical direction 39 is also perpendicular to the axis 5.
  • the natural understanding of height and vertical direction 39 is obtained by rolling the inner surface 40. Based on a Cartesian coordinate system, each rotary driving web has 38th its own vertical direction 39.
  • the rotary driving web 38 is limited in its determined in the circumferential direction 41 width by two driving surfaces 42.
  • the preferably flat driving surface 42 transmits a torque from the tube 19 to the insertion end 7.
  • the driving surface 42 is substantially parallel to a radial direction; the driving surface 42 lies in a plane with the axis 5.
  • a roof surface 43 of the rotary driving web 38 closes the rotary driving web 38 in the radial direction and defines its height.
  • the roof surface 43 faces the axis 5, in particular, the vertical direction 39 may be perpendicular to the roof surface 43.
  • the illustrated embodiment has an inserted into the tube 19 insert 44, which forms the bearing shells 33 for the locking elements 30 and the Drehit Spotifystege 38 for the rotary driving.
  • the tube 19 has coaxial with the axis 5, a cylindrical cavity which is equal in size to the receiving space 26.
  • the cylindrical shape may comprise circular cylindrical and prismatic with at least sixfold symmetry.
  • the tube 19 is opened along a direction transverse to the axis 5 by a prismatic recess 45 (see Figures 4 and 5).
  • the recess 45 may be one or two opposing ones Form openings 46 through the wall of the tube 19.
  • the opening has an edge closed about the alignment axis 47.
  • the recess 45 has a front surface 48 pointing in the removal direction 6 and a rear surface 49 facing the removal direction 6.
  • Two lateral surfaces 50 of the recess 45 connect the front surface 48 to the rear surface 49.
  • the surfaces 48, 49, 50 are parallel to an alignment axis 47.
  • the alignment axis 47 defines the orientation of the recess 45 and the surfaces 50 delimiting it.
  • the alignment axis 47 may be determined based on the connecting line of the center (centroid) of the opening on the outside of the tube 19 and on the inside of the tube 19.
  • the recess 45 may also be formed in the shape of a truncated pyramid.
  • the surfaces 48, 49, 50 are inclined relative to each other such that a cross section enclosed by them monotonically decreases in a direction along the alignment axis 47.
  • the recess 45 expands the cavity of the tube 19 with respect to the inner diameter 27 preferably in all directions within a plane perpendicular to the axis 5.
  • a distance 51 of the lateral surfaces 50 is preferably greater than the inner diameter 27.
  • the cylindrical inner surface of the tube 19 can be divided by the recess 45 in two completely separated from each other front cylindrical inner surface 52 and a rear cylindrical inner surface 53.
  • the outer contour of the insert 44 is formed complementary to the recess 45.
  • the exemplary insert 44 has a substantially cuboidal outer contour, with an example, front rounded end face.
  • the along the alignment axis 47 and along the axis 5 extending side surfaces 54 are preferably flat against the complementary lateral surfaces of the recess 45.
  • the side surfaces 54 may be parallel to at least one of the axis 5 and the alignment axis 47.
  • a width 55 and a height 56 of the insert 44 are greater than the diameter 27 of the receiving space 26.
  • the height 56 is determined along the alignment axis 47 and the width 55 perpendicular to the alignment axis 47 in each case in a projection on a plane perpendicular to the axis 5 ,
  • a length 57 of the insert 44, ergo the recess 45, is less than the length 28 of the cylindrical tube 19.
  • the insert 44 has a coaxial with the axis 5 extending cavity.
  • the inner surface 58 of the insert 44 is substantially concave, preferably cylindrical.
  • An inner diameter 59 of the insert 44 is equal to or slightly larger than the inner diameter 27 of the tube 19th
  • the tool receiving space 26 is composed of two or three sections.
  • a portion 60 forms the cavity of the insert 44.
  • the front Cylindrical inner surface 52 of tube 19 may have a front portion 61 adjacent to insert 44 and rear cylindrical inner surface 53 of tube 19 may form a rear portion 62 adjacent to insert 44.
  • the outer sections 61, 62 formed by the tube 19 preferably have a slightly smaller inner diameter 27, whereby bending forces acting on the tool transversely to the axis 5 are transmitted directly to the tube 19 and the base body 18 without loading the insert 44.
  • the tube 19 may be formed of a correspondingly tough steel.
  • the height 56 i. the dimension along the alignment axis 47, the insert 44 is approximately equal to the corresponding outer dimension 63 of the tube 19.
  • the exposed outer surfaces 64 (top surfaces) of the insert 44 are largely flush with the base body 18 from, here by way of example with the flat key surfaces 24.
  • the above described bearing shell 33 for the locking ball 30 is formed in one or both top surfaces 64.
  • the top surfaces 64 of the insert 44 are preferably flat.
  • the insert 44 is formed with the rotary driving webs 38.
  • all Drehit Vietnamesestege 38 of the tool holder 8 are part of the insert 44.
  • Number, geometry and orientation of the rotary driving webs 38 is as described above.
  • the rotary driving web 38 project from the concave inner surface 58 of the insert 44 in the vertical direction 39.
  • the vertical direction 39 extends on the respective connecting line from the rotary driving web 38 to the axis 5.
  • the vertical direction 39 of at least one or preferably all rotary driving webs 38 is inclined, for example perpendicular, to the alignment axis 47 of the recess 45.
  • the rotary driving web 38 is supported on the tube 19 in its vertical direction 39.
  • the vertical direction 39 of the rotary trip bar 38 extends through the side surface 54 of the insert 44 concealed by the tube 19 and not through the exposed top surface 64.
  • the roof surface 43 of the rotary trip bar 38 is partially or entirely off the axis 5 preferably completely away from the axis 5.
  • the relative inclination of the two directions 39, 47 is determined in a projection on the plane perpendicular to the axis 5, if the alignment axis 47 should not be perpendicular to the axis 5.
  • the insert 44 with the rotary driving webs 38 is preferably monolithic.
  • Monolithic is to be understood as the opposite of a body composed of two or more parts.
  • the monolithic insert 44 has no joining zones, neither positive, non-positive nor material-locking, eg by soldering, gluing, welding, Art.
  • the insert 44 is formed from a blank.
  • the insert 44 is preferably located loosely in the recess 45 so as to be removable from the base body 18 if required without assembly tools.
  • the insert 44 is not attached in a material-locking manner, eg glued, soldered, welded, fixed in the tube 19. Once a hammer drill 4 is inserted into the receiving space 26 and thus pushed through the cylindrical cavity of the insert 44, the insert 44 is stabilized.
  • the slider 35 may further be configured to hold the insert 44 in position.
  • the slider encloses annularly the tube 19 of the base body 18 and has an inner contour 65 which rests against the top surfaces 64 of the insert 44.
  • the slider 35 is arranged approximately centrally to the insert 44.
  • the length 57 of the insert 44 is further designed so that when inserting the hammer drill 4, the slider 35 is not pushed down from the insert 44.
  • the recess 45 may be closed along the alignment axis 47 on one side by a bottom, i. be cup-shaped. A thickness of the bottom is equal to or less than the wall thickness of the tube 19.
  • the associated insert 44 encloses annularly the receiving space 26.
  • the insert 44 has only one exposed top surface 64 and a bearing shell 33. Further, the insert 44 has within its cavity one or more rotational engagement webs 38 for the rotary drive.
  • the assemblies of the flange lock 22 and the tool lock 21 can be removed from the main body 18. This is particularly useful for replacing the two actuating sleeves 66, 32, the locking balls 30 and possibly the insert 44.
  • the actuating sleeve 32 is supported on an axially immovable securing bracket 68 by means of an end face 67 pointing in the withdrawal direction 6.
  • the securing bracket 68 is seated in a groove 69, which is provided along the circumference at a tool-side end of the main body 18.
  • the exemplary actuating sleeve 32 has an annular or hollow cylindrical projection 70 which encloses the securing bracket 68 in the radial direction.
  • a radial clearance between the circlip 68 and the projection 70 is less than a depth of the groove 69, whereby the circlip 68 is caught in the groove 69.
  • the projection 70 with its radial inner surface 71 can lie directly against the securing bow 68.
  • the user can use the actuating sleeve 32 move axially against a spring 36 to release the securing bracket 68 in the radial direction and to withdraw the securing bracket 68 from the groove 69.
  • the safety bracket 68 is constructed substantially symmetrical.
  • a web 72 connects two opposite clamping legs 73.
  • the two clamping legs 73 engage in the groove 69 of the base body 18 a.
  • the web 72 may also engage or be exposed in the groove 69.
  • the tube 19 is only partially enclosed by the securing bracket 68 in order to be able to remove it without great effort.
  • the clamping legs 73 are to be spread slightly to avoid accidental falling out.
  • the enclosed angle 74 is less than 250 degrees and is preferably in the range between 210 degrees and 240 degrees.
  • the angle 74 is measured on the groove bottom 75 between the two along the circumferential direction 41 outermost of the clamping legs 73 touched points 76.
  • the inner contour of the securing bracket 68 between the two points 76 is preferably largely circular-segment-shaped, and lies continuously against the groove bottom 75.
  • the forwardly facing in the insertion direction portions 77 of the clamping legs 73 define an opening 78 of the securing bracket 68.
  • the front portions 77 are pushed over in the insertion direction over the groove bottom 75 and therefore exposed.
  • the opening width 78 i. the distance 78 of the clamping legs 73, is in the range of at least 80%, preferably between 87% and 97%, of the diameter 79 of the groove 69th
  • the safety bracket 68 has a handle.
  • the handle is arranged on the side opposite the base body 18 of the web 72.
  • the exemplary handle 80 consists of two lugs 80, each beginning at one end of the web 72 and spaced in the radial direction of the web 72 in the circumferential direction 41 converge. The tips of the two lugs 80 may be separated by a gap 81.
  • the user may, for example, with a screwdriver or other flat tool in the 72 surrounded by the web 72 and handle 80 slot 82 to lift the safety bracket 68 from the groove 69.
  • the securing bracket 68 is preferably plate-shaped.
  • the clamping legs 73 have a width, measured in the radial direction 39, which is significantly greater than the thickness, measured along the axis 5, of the securing bracket 68.
  • a width of the web 72 is less than the width of the clamping legs 73rd
  • the securing bracket 68 may have a pin 83 projecting from the web 72 in the radial direction to the axis 5.
  • the main body 18 has a corresponding recess 84 to accommodate the mandrel 83.
  • the recess 84 is, at least in the circumferential direction, approximately positively to the mandrel 83.
  • the circlip 68 is prevented from rotating about the working axis 5 and thus has a fixed azimuth, ie a fixed angular orientation.
  • the handle 80 and the locking balls 30 have, for example, the same azimuth and lie in alignment parallel to the working axis 5.
  • An outer contour of the base body 18 is provided with the flattened key surface 24 in the region of the locking balls 30.
  • the flattened key surface 24 is preferably extended up to the annular groove 69. In front of the slot 82 is thereby a cavity 60 between the bushing 31 and the key surface 24, in which the user can insert the puller.
  • the circlip 68 finds particular attention in the illustrated embodiment with the removable insert 44. Further, there is an interest in the securing bracket 68 in a one-piece receiving space 85, the entire wall surface 86 is formed by a tube 87 of the base body 88.
  • a cover 89 made of a soft plastic is attached to the tip of the base body 18 and protects the two latches 21, 22 from dust.
  • the cover 89 can be pulled off the base body 18 by hand.
  • the exemplary flange 20 can be pushed onto the output shaft 11.
  • the releasable flange lock 22 allows the flange 20 to apply torsionally rigidly to the output shaft 11 and to release it without tools.
  • the flange lock 22 has a plurality of coupling balls 90 or coupling pins which engage through radial openings 46 of the flange 20 in corresponding recesses of the output shaft 11.
  • An actuating sleeve 66 of the flange lock 22 is placed on the flange 20 and movable along the working axis 5.
  • a spring 36 holds the actuating sleeve 66 in a locking position in which a radial movement of the coupling balls 90 is inhibited and thus they are forced into engagement with the output shaft 11.
  • the user can move the actuating sleeve 66, preferably in withdrawal direction 6 of the tool 4 against the spring 36 until the coupling balls 90 can radially escape and disengage.
  • the tool holder 8 can be removed.
  • the removable tool holder 8 is a preferred embodiment for many applications, a permanent connection or detachable only by tool connection of the body 18 to the output shaft 11 for other applications is advantageous, for example, for a simple and compact design.
  • the main body 18 can be formed integrally with a guide tube of the intermediate racket 16 or the racket 13, for example.

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

Abstract

L'invention concerne un porte-outil (8) pour machine-outil portative (1), comprenant un espace de réception (26) entourant un axe (5), pour la réception d'une extrémité à insérer (7) d'un outil (4). L'espace de réception (26) est formé par un tube (19) coaxial à l'axe (5), et par une pièce d'insertion (43). Une surface intérieure (51, 52) du tube (19) forme une partie (60, 61) d'une surface de paroi (39) de l'espace de réception (26). Le tube (19) présente un évidement (44) traversant le tube (19), le long d'une première direction (46), la première direction (46) étant inclinée par rapport à l'axe (5). La pièce d'insertion (43) est insérée dans l'évidement (44), le long de la première direction (46). Une surface intérieure concave (57) de la pièce d'insertion (43) forme une autre partie (59) de la surface de paroi (39) de l'espace de réception (26). En outre, la pièce d'insertion (43) présente un tenon d'entraînement en rotation (37), en saillie à partir de la surface intérieure concave (57), vers l'axe (5), pour un entraînement en rotation. Une ligne partant du tenon d'entraînement en rotation (37) et passant par l'axe (5) définit une seconde direction (38). Cette seconde direction (38) est inclinée par rapport à la première direction (46).
PCT/EP2013/076153 2012-12-13 2013-12-11 Porte-outil WO2014090840A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13805842.5A EP2931480A1 (fr) 2012-12-13 2013-12-11 Porte-outil
CN201380072895.3A CN104994998B (zh) 2012-12-13 2013-12-11 工具保持器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012223094.7 2012-12-13
DE102012223094.7A DE102012223094A1 (de) 2012-12-13 2012-12-13 Werkzeughalter

Publications (1)

Publication Number Publication Date
WO2014090840A1 true WO2014090840A1 (fr) 2014-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/076153 WO2014090840A1 (fr) 2012-12-13 2013-12-11 Porte-outil

Country Status (4)

Country Link
EP (1) EP2931480A1 (fr)
CN (1) CN104994998B (fr)
DE (1) DE102012223094A1 (fr)
WO (1) WO2014090840A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3338957A1 (fr) * 2016-12-23 2018-06-27 HILTI Aktiengesellschaft Appareil d'outillage
WO2020025288A1 (fr) 2018-07-31 2020-02-06 Inventio Ag Dispositif et procédé servant à retirer un outil d'un porte-outil
EP3834970A1 (fr) * 2019-12-11 2021-06-16 Hilti Aktiengesellschaft Dispositif de transmission d'un couple de rotation d'un appareil de forage à une couronne de forage
CN115038557A (zh) 2020-02-07 2022-09-09 因温特奥股份公司 用于在墙壁上执行装配步骤的装配设备以及用于更换装配装置的工具的方法

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DE19604282A1 (de) * 1996-02-07 1997-08-14 Bosch Gmbh Robert Werkzeughalter mit Aufnahme für verschiedene Werkzeugsysteme
DE10031938A1 (de) * 2000-06-30 2002-01-17 Bosch Gmbh Robert Werkzeughalter für eine Bohr- und/oder Schlagwerkzeugmaschine

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CN104994998A (zh) 2015-10-21
EP2931480A1 (fr) 2015-10-21

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