SE538056C2 - Tool holder assembly including a freely rotatable sleeve - Google Patents

Tool holder assembly including a freely rotatable sleeve Download PDF

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Publication number
SE538056C2
SE538056C2 SE1350188A SE1350188A SE538056C2 SE 538056 C2 SE538056 C2 SE 538056C2 SE 1350188 A SE1350188 A SE 1350188A SE 1350188 A SE1350188 A SE 1350188A SE 538056 C2 SE538056 C2 SE 538056C2
Authority
SE
Sweden
Prior art keywords
shaft
tool holding
sleeve
outer sleeve
diameter
Prior art date
Application number
SE1350188A
Other languages
Swedish (sv)
Other versions
SE1350188A1 (en
Inventor
Max Claesson
Original Assignee
Husqvarna Ab
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 Husqvarna Ab filed Critical Husqvarna Ab
Priority to SE1350188A priority Critical patent/SE538056C2/en
Priority to PCT/SE2014/050155 priority patent/WO2014126525A1/en
Publication of SE1350188A1 publication Critical patent/SE1350188A1/en
Publication of SE538056C2 publication Critical patent/SE538056C2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/005—Cylindrical shanks of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/113—Retention by bayonet connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/112—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts comprising torque-transmitting surfaces, e.g. bayonet joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
    • B23B2231/0208—Bores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
    • B23B2231/028—Lugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2265/00—Details of general geometric configurations
    • B23B2265/32—Polygonal
    • B23B2265/328—Octagonal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

13ABSTRACT The present invention relates to a tool holding arrangement (1) comprising a toolholding device (2), an outer sleeve (3) and a shaft (4) connectable to a tool motor,The tool holding device (2) comprises a first torque-transmitting means (6) and anouter thread (7), the shaft (4) comprises a second torque-transmitting means (8),the outer sleeve (3) comprises an inner thread (9). The treads and the torque-transmitting means are arranged to engage each other. The shaft (4) comprises afirst and second shaft flange (10, 11) with a first and second diameter (D1, Dz),these flanges (10, 11) being separated by a shaft groove (12) with a third diameter(Ds). The outer sleeve (3) has a minimum inner diameter (Dimin) which exceeds atleast one of the first and second diameter (D1, Dg). The arrangement (1) furthercomprises a first and second sleeve flange part (13, 14) which are releasablymountable to the outer sleeve (3). When mounted they have a maximum flangepart inner diameter (Dfmax) that falls below both the first and second diameter (D1,Dz), but exceeds the third diameter (D3). (Flo. s)

Description

1 Applicant: HUSQVARNA AB, S-561 83 Huskvarna, Sweden Ref P2899SEO0 A TOOL HOLDER ARRANGEMENT TECHNICAL FIELD The present invention relates to a tool holding arrangement comprising a toolholding device, a freely rotatable outer sleeve and a rotatable shaft which is atleast connectable to a tool driving power source. The tool holding devicecomprises a first torque-transmitting means and an outer thread and the shaftcomprises a second torque-transmitting means. The outer sleeve comprises aninner thread. The torque-transmitting means are arranged to engage each otherand the threads are arranged to engage each other when the tool holding device isconnected to the shaft.
BACKGROUND ART Construction machines are for example used when renovating, reconstructing andextending buildings. Drill motors with annular core bits are normally used fordrilling holes, for example for piping in floors and walls of buildings. Tool holdersare used for connecting a tool, such as a drill, to the core bit, where the tool isattached to the tool holder; for example by means of welding.
The connection between a core bit and a tool holder is often made by means ofthreads, where the tool holder is screwed to the core bit. However, such anarrangement has disadvantages such as jamming of the threads. Therefore, othertypes of connections between a core bit and a tool holder have been proposed. ln US 2004/0154838 a tool holder is arranged for mounting to a core bit by meansof coaxially arranged corresponding guide members, splines and conical surfaceswhich engage each other. ln order to secure the mounting, a threaded flange onthe core bit is screwed to corresponding threads on the tool holder.
However, there is still a need for a less complicated and easily managed toolholding arrangement for mounting and securing a tool holder to a core bit.
SUMMARY One object of the invention is to provide a tool holding arrangement comprising atool holding device, a freely rotatable outer sleeve and a rotatable shaft which is atleast connectable to a tool driving power source. The tool holding devicecomprises a first torque-transmitting means and an outer thread, and the shaftcomprises a second torque-transmitting means. The outer sleeve comprises aninner thread. The torque-transmitting means are arranged to engage each otherand the threads are arranged to engage each other when the tool holding device isconnected to the shaft.
The shaft comprises a first circumferential shaft flange with a first diameter and asecond circumferential shaft flange with a second diameter. The shaft flanges areseparated by a circumferential shaft groove with a third diameter. The outer sleevehas a minimum sleeve inner diameter which exceeds at least one of the firstdiameter and the second diameter. The tool holding arrangement furthercomprises a first sleeve flange part and a second sleeve flange part, where thesleeve flange parts are mountable to, and dismountable from, the outer sleeve.When the sleeve flange parts are mounted to the outer sleeve, they have at leastone maximum flange part inner diameter that falls below both the first diameterand the second diameter, but exceeds the third diameter.
According to an example, when the tool holding device is to be connected to theshaft, the shaft is positioned to run through the outer sleeve and the sleeve flangeparts are mounted to the outer sleeve such that the sleeve flange parts arepositioned between the first circumferential shaft flange and the secondcircumferential shaft flange. This prevents the outer sleeve from coming off theshaft.
According to another example, the tool holding arrangement further comprises afirst spring washer and a second spring washer. The spring washers aresandwiched between the corresponding sleeve flange parts and the outer sleevewhen the sleeve flange parts are mounted to the outer sleeve. 3 According to another example, when the tool holding device is connected andaxially locked to the shaft, the threads are engaged such that the spring washersabuts a first side of the first circumferential shaft flange. ln the above case, each spring washer may comprise at least one protrusion, eachprotrusion being arranged to resiliently engage a plurality of correspondingrecesses arranged along the first side of the first circumferential shaft flange. Thisarrangement provides a click-lock function with distinct locking positions when theprotrusions engage corresponding recesses.
Other examples are disclosed in the dependent claims.
Many advantages are provided by means of the present invention. l\/lainly, a lesscomplicated and easily managed tool holding arrangement for mounting andsecuring a tool holder to a core bit is provided..
BRIEF DESCRIPTION OF THE DRAWINGSln the following, the invention will be described in more detail with reference topreferred embodiments and the appended drawings, where: Figure 1 shows a perspective view of an assembled tool holding arrangement;Figure 2 shows a perspective view of a partly disassembled tool holdingarrangement; Figure 3 shows an exploded perspective view of the tool holding arrangement;Figure 4 shows a perspective view of a rotatable shaft; Figure 5 shows a perspective view of spring washers; Figure 6 shows a first perspective view of a tool holding device; Figure 7 shows a second perspective view of the tool holding device; 4 Figure 8 shows a first perspective view of a rotatable outer sleeve;Figure 9 shows a second perspective view of the rotatable outer sleeve;Figure 10 shows a view of mounted shaft flanges; and Figure 11 shows a first perspective view of an alternative rotatable shaft.
DETAILED DESCRIPTION With reference to Figure 1 and Figure 2, showing detailed perspective views of atool holding arrangement 1, the tool holding arrangement 1 comprises a toolholding device 2, a freely rotatable outer sleeve 3 and a rotatable shaft 4 whichhere is shown connected to an electric tool driver 5. The electric tool driver 5, inFigure 1 and Figure 2 only shown partially, is of a conventional kind and will not befurther discussed here.
With reference also to Figure 6 and Figure 7, showing detailed perspective viewsof the tool holding device 2, the tool holding device 2 is arranged to be fastened toa suitable tool such as a drill, not shown, by means of, for example, welding to asurface 37 facing away from the electric tool driver 5 when mounted. The toolholding device 2 comprises a first torque-transmitting means 6 in the form of anoctagonal through hole 6 running through the tool holding device 2. The toolholding device 2 further comprises an outer thread 7, in this example shown as atrapezoidal thread.
With reference instead also to Figure 4, showing a detailed perspective view ofthe shaft 4, the shaft 4 comprises a second torque-transmitting means 8 in theform of an octagonal rod 8, arranged to fit in the octagonal through hole 6 of thetool holding device 2. The torque-transmitting means 6, 8 are arranged to engageeach other when the tool holding device 2 is connected to the shaft 4. Apertures38; 39a, 39b, 390 for handling water and dust are arranged in a conventionalmanner. 5 With reference also to Figure 8 and Figure 9, showing detailed perspective viewsof the outer sleeve 3, the outer sleeve 3 comprises an inner thread 9, arranged toengage the outer thread 7 of the tool holding device 2 when the tool holding device2 is connected to the shaft 4. The outer sleeve 3 comprises an outer grip surface40 that has a structure that allows it to be relatively easily turned by hand, hereshown having longitudinally extending ribs. The outer sleeve 3 has a first side 41and a second side 42, the first side 41 facing away from the electric tool driver 5when mounted and the second side 42 facing the electric tool driver 5 whenmounted. The second side 42 comprises six screw receiving apertures 31, 32, 33;34, 35, 36, equipped with inner threads. The purpose of these apertures isexplained later in the description.
According to the present invention, with reference to Figure 3 and Figure 4, theshaft 4 comprises a first circumferential shaft flange 10 with a first diameter D1 anda second circumferential shaft flange 11 with a second diameter Dg, the shaftflanges 10, 11 being separated by a circumferential shaft groove 12 with a thirddiameter D3. As shown in Figure 9, the outer sleeve 3 has a minimum sleeve innerdiameter Dimin which exceeds at least one of the first diameter D1 and the seconddiameter D2.
As shown in Figure 2 and 3 the tool holding arrangement 1 further comprising a first sleeve flange part 13 and a second sleeve flange part 14, the sleeve flangeparts 13, 14 being mountable to, and dismountable from, the outer sleeve 3. ln thisexample the mounting is enabled by means of screws 18, 19, 20; 21, 22, 23arranged to run through corresponding apertures 24, 25, 26; 27, 28 29 in thesleeve flange parts 13, 14 and to be screwed into the corresponding screwreceiving apertures 31, 32, 33; 34, 35, 36 in the outer sleeve 3.
When mounted to the outer sleeve 3, as shown in Figure 10, the sleeve flangeparts 13, 14 have at least one maximum flange part inner diameter Dfmax that fallsbelow both the first diameter D1 and the second diameter D2, but exceeds the thirddiameter D3. ln this way, the outer sleeve 3 may be thread onto the shaft and positioned suchthat when the sleeve flange parts 13, 14 are mounted to the outer sleeve 3, the 6sleeve flange parts 13, 14 become positioned between the first circumferentialshaft flange 10 and the second circumferential shaft flange 11, preventing theouter sleeve 3 from coming off the shaft 4. This enables an easy mounting anddismounting of the outer sleeve 3 from the shaft 4.
The outer sleeve 3 is mounted to the shaft 4 in the above manner when the toolholding device 2 is to be connected to the shaft 4. Now, it is possible to mount thetool holding device 2 to the shaft 4 by screwing the outer sleeve 3 such that itsinner threads 9 engage the outer threads 7 of the tool holding device 2. Then thetool holding device 2 is connected and axially locked to the shaft 4. ln order to obtain an enhanced mounting of the outer sleeve 3 to the shaft 4, thetool holding arrangement 1 may alternatively further comprise a first spring washer15 and a second spring washer 16. The spring washers 15, 16 are sandwichedbetween the corresponding sleeve flange parts 13, 14 and the outer sleeve 3when the sleeve flange parts 13, 14 are mounted to the outer sleeve 3. ln order toenable such a mounting, the spring washers 15, 16 comprises apertures 43, 44,45; 46, 47, 48 through which said screws 18, 19, 20; 21, 22, 23 may run through.
When the tool holding device 2 is connected and axially locked to the shaft 4, thespring washers 15, 16 abuts a first side 17 of the first circumferential shaft flange10.
According to an example of a certain type of spring washers, as shown in thedetailed perspective view in Figure 5, each spring washer 15, 16 may comprisetwo protrusions 15a, 15b; 16a, 16b. Each protrusion 15a, 15b; 16a, 16b is in theform of a finger extending radially inwards when the spring washers 15, 16 aremounted. These protrusions 15a, 15b; 16a, 16b are arranged to resiliently engagea plurality of corresponding recesses 17a, 17b, 17c, 17d, 17e, only a limitednumber of these recesses shown in Figure 4, arranged along the first side 17 ofthe first circumferential shaft flange 10. The total number of recesses in thisexample is 8.
By means of these protrusions 15a, 15b; 16a, 16b engaging the recesses 17a,17b, 17c, 17d, 17e when the outer sleeve 3 is screwn to the tool holding device 2, 7 a Iocking function is obtained for the outer sleeve 3, preventing it from unscrewing when running the electric tool driver 5 with the tool mounted.
With reference to Figure 11, some alternatives for the shaft are shown. Figure 11shows many resemblances to the shaft of Figure 4, and for reasons of clarity inFigure 11, mainly only the parts that differ are indicated in Figure 11 anddiscussed in the following. lt is to be understood that the other details are more orless the same, or at least equivalent. ln Figure 11, a shaft 4' has a torque-transmitting means in the form of a hexagonalrod 8', where, at the end of the hexagonal rod 8' that is arranged to face the toolholding device 2, a cylindrical first extension 30 is positioned. This cylindricalextension 30 has a fourth diameter D., that falls below the larges distance betweentwo edges of the hexagonal rod 8' and facilitates the mounting of the tool holdingdevice 2 to the shaft 4'. Furthermore, at the other end of the hexagonal rod 8',facing and abutting the first circumferential shaft flange 10', a cylindrical secondextension 31 is positioned, the second extension 31 thus being positionedbetween the second torque-transmitting means 8, 8' and the first circumferentialshaft flange 10'. The second extension 31 has a fifth diameter that is larger thanthe first extension 30 and is arranged for steering the tool holding device 2 into arigid holding position by means of a corresponding cylindrical aperture in the toolholding device 2 (not shown).
The cylindrical first extension 30 may also be arranged for steering the tool holdingdevice 2 into a rigid holding position by means of another corresponding cylindricalaperture in the tool holding device 2 (not shown).
Either one of these extensions 30, 31 may be omitted, and may also be used forany type of torque-transmitting means, not only the hexagonal rod 8' shown in thisexample. One or both of the extensions 30, 31 may instead have a conical shape,where the diameter increases towards the first circumferential shaft flange 10'.
The present invention is not limited to the above, but may vary freely within thescope of the appended claims. For example, the shaft may not be directlyconnected to the electric tool driver 5, but may constitute an intermediate part. 8 Often the shaft of the electic tool driver has an end with an outer thread intendedto be screwed into an inner thread of the tool, normally a drill bit. ln this case thetool holding arrangement is in the form of an adapter, where the rotatable shaft 4is secured to the thread of the shaft of the electric tool driver and the tool holdingdevice 2 is secured to the thread of the tool.
The electric tool driver 5 is generally in the form of a tool driving power source 5which may be run by hand or by means of a motor that may be electric, hydraulic,air power, or of a combustion type.
The torque-transmitting means 6, 8 may have any suitable shape, for example inthe form of corresponding splines or torques.
Other fastening means than the screws 18, 19, 20; 21, 22, 23 is of coursepossible, and the number of such fastening means may vary.
The number of protrusions 15a, 15b; 16a, 16b may also vary. lt is possible to haveother types of resiliently engaging means, for example spring-loaded ballsarranged in the shaft flanges 10, 11. ln this case, no spring washers 15, 16 wouldbe used.
The number of shaft flanges 10, 11 may vary, but there should be at least two inorder to enable a relatively easy locking of the outer sleeve 3 to the shaft 4. instead of shaft flanges 10, 11, other traditional fastening means such as lockingsprings may be used.
The trapezoidal threads are only an example of suitable threads. Any type ofsuitable threads may be used, and it is desired that the threads are robust anddurable.
The torque-transmitting means 6, 8 may have conical shape, having an increasingcross-sectional surface towards the first circumferential shaft flange 10”.
Circumferential recesses (not shown) may be made in the shaft 4, 4' at suitablepositions, the recesses being adapted to receive sealings such as O-rings. An 9 example is such a recess in the octagonal or hexagonal rod (8; 8”), both in a straitand conical shaped version. An other example is such a recess in the first orsecond extension (30; 31), both in a cylindrical or conical shaped version.
The number of recesses 17a, 17b, 17c, 17d, 17e arranged along the first side 17of the first circumferential shaft flange 10 may vary, and is preferably an evenmultiple of the number of edges of the torque-transmitting means 6, 8. The numberof recesses 17a, 17b, 17c, 17d, 17e may for example be double the number ofengaging surfaces of the torque-transmitting means 6, 8, which for a hexagonalrod 8' results in twelve corresponding recesses and for an octagonal rod 8 resultsin sixteen corresponding recesses.
The spring washer may be made in any suitable material such as for examplesteel, copper or brass.

Claims (12)

CLA||\/IS
1. A tool holding arrangement (1) comprising a tool holding device (2), afreely rotatable outer sleeve (3) and a rotatable shaft (4) which is at leastconnectable to a tool driving power source (5), where the tool holding device (2)comprises a first torque-transmitting means (6) and an outer thread (7), the shaft(4) comprises a second torque-transmitting means (8), and where the outer sleeve(3) comprises an inner thread (9), said torque-transmitting means (6, 8) beingarranged to engage each other and said threads (7, 9) being arranged to engageeach other when the tool holding device (2) is connected to the shaft (4),characterized in that the shaft (4) comprises a first circumferential shaft flange(1 O) with a first diameter (D1) and a second circumferential shaft flange (11) with a(10,circumferential shaft groove (12) with a third diameter (D3), the outer sleeve (3) second diameter (Dg), the shaft flanges 11) being separated by ahaving a minimum sleeve inner diameter (Dimln) which exceeds at least one of thefirst diameter (D1) and the second diameter (Dz), the tool holding arrangement (1)further comprising a first sleeve flange part (13) and a second sleeve flange part(14), the sleeve flange parts (13, 14) being mountable to, and dismountable from,the outer sleeve (3) and, when mounted to the outer sleeve (3), having at leastone maximum flange part inner diameter (Dfmax) that falls below both the firstdiameter (D1) and the second diameter (Dg), but exceeds the third diameter (D3).
2. A tool holding arrangement according to claim 1, characterized inthat when the tool holding device (2) is to be connected to the shaft (4), the shaft(4) is positioned to run through the outer sleeve (3) and the sleeve flange parts(13, 14) are mounted to the outer sleeve (3) such that the sleeve flange parts (13,14) are positioned between the first circumferential shaft flange (10) and thesecond circumferential shaft flange (11), preventing the outer sleeve (3) fromcoming off the shaft (4).
3. A tool holding arrangement according to any one of the previousclaims, characterized in that the tool holding arrangement (1) further comprises afirst spring washer (15) and a second spring washer (16), the spring washers (15,16) being sandwiched between the corresponding sleeve flange parts (13, 14) and 11 the outer sleeve (3) when the sleeve flange parts (13, 14) are mounted to the outersleeve (3).
4. A tool holding arrangement according to claim 3, characterized inthat when the tool holding device (2) is connected and axially locked to the shaft(4), the threads (7, 9) are engaged such that the spring washers (15, 16) abuts afirst side (17) of the first circumferential shaft flange (1 O).
5. A tool holding arrangement according to any one of the claims 3 or 4,characterized in that each spring washer (15, 16) comprises at least oneprotrusion (15a, 15b; 16a, 16b), each protrusion (15a, 15b; 16a, 16b) beingarranged to resiliently engage a plurality of corresponding recesses (17a, 17b,17c, 17d, 17e) arranged along the first side (17) of the first circumferential shaftflange (10).
6. A tool holding arrangement according to any one of the previousclaims, characterized in that the first torque-transmitting means (6) is in the formof an octagonal through hole (6) running through the tool holding device (2), andthat the second torque-transmitting means (8) is in the form of a correspondingoctagonal rod (8), arranged to fit in the octagonal through hole (6).
7. A tool holding arrangement according to any one of the previousclaims, characterized in that the outer thread (7) is in the form of a trapezoidalthread.
8. A tool holding arrangement according to any one of the previousclaims, characterized in that the sleeve flange parts (13, 14) are mountable to theouter sleeve (3) by means of screws (18, 19, 20; 21, 22, 23) running throughcorresponding apertures (24, 25, 26; 27, 28 29) and into corresponding screwreceiving apertures (31, 32, 33; 34, 35, 36) in the outer sleeve (3).
9. A tool holding arrangement according to any one of the previousclaims, characterized in that a first extension (30) is positioned at an end of thesecond torque-transmitting means (8, 8”) that is arranged to face the tool holdingdevice (2). 12
10. A tool holding arrangement according to claim 9, characterized inthat the first extension (30) either is cylindrical or conical where its diameterincreases towards the first circumferential shaft flange (1 O, 10').
11. A tool holding arrangement according to any one of the previousclaims, characterized in that a second extension (31) is positioned between thesecond torque-transmitting means (8, 8') and the first circumferential shaft flange(10, 10').
12. A tool holding arrangement according to claim 11, characterized inthat the second extension (31) either is cylindrical or conical where its diameterincreases towards the first circumferential shaft flange (1 O, 10').
SE1350188A 2013-02-18 2013-02-18 Tool holder assembly including a freely rotatable sleeve SE538056C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE1350188A SE538056C2 (en) 2013-02-18 2013-02-18 Tool holder assembly including a freely rotatable sleeve
PCT/SE2014/050155 WO2014126525A1 (en) 2013-02-18 2014-02-07 A tool holder arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1350188A SE538056C2 (en) 2013-02-18 2013-02-18 Tool holder assembly including a freely rotatable sleeve

Publications (2)

Publication Number Publication Date
SE1350188A1 SE1350188A1 (en) 2014-08-19
SE538056C2 true SE538056C2 (en) 2016-02-23

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WO (1) WO2014126525A1 (en)

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KR101990801B1 (en) * 2018-12-17 2019-06-19 주식회사 대성지티 Core drill with one-touch lock function of core bit
CN215256059U (en) 2021-02-10 2021-12-21 米沃奇电动工具公司 Core drilling machine assembly

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DE10256043A1 (en) * 2002-11-30 2004-06-09 Hilti Ag Tool holder for core bits
US20070243013A1 (en) * 2006-04-13 2007-10-18 Hewitt William G Tool system for mechanical mounting assembly
DE102007026040B4 (en) * 2007-06-04 2011-06-16 Ifa-Technologies Gmbh Device for connecting a pin of a transmission with a joint body of a drive joint of a drive shaft
CN202779907U (en) * 2012-08-01 2013-03-13 创科电动工具科技有限公司 Electric tool

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WO2014126525A1 (en) 2014-08-21

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