SE534396C2 - Drilling machine with adjustable feed speed - Google Patents

Drilling machine with adjustable feed speed

Info

Publication number
SE534396C2
SE534396C2 SE0901578A SE0901578A SE534396C2 SE 534396 C2 SE534396 C2 SE 534396C2 SE 0901578 A SE0901578 A SE 0901578A SE 0901578 A SE0901578 A SE 0901578A SE 534396 C2 SE534396 C2 SE 534396C2
Authority
SE
Sweden
Prior art keywords
spindle
drilling
drill
speed
housing
Prior art date
Application number
SE0901578A
Other languages
Swedish (sv)
Other versions
SE0901578A1 (en
Inventor
Ulf Mikael Eriksson
Wilhelm Mattias Jacobsson
Original Assignee
Atlas Copco Tools 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 Atlas Copco Tools Ab filed Critical Atlas Copco Tools Ab
Priority to SE0901578A priority Critical patent/SE534396C2/en
Priority to PCT/EP2010/070053 priority patent/WO2011073381A1/en
Publication of SE0901578A1 publication Critical patent/SE0901578A1/en
Publication of SE534396C2 publication Critical patent/SE534396C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
    • B23Q5/402—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw in which screw or nut can both be driven
    • 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
    • B23B45/008—Gear boxes, clutches, bearings, feeding mechanisms or like equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/32—Feeding working-spindles
    • B23Q5/323—Feeding working-spindles cam-operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/32—Feeding working-spindles
    • B23Q5/326—Feeding working-spindles screw-operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
    • B23Q5/404—Screw bearings therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)

Abstract

. En borrmaskin innefattande ett hus (lO,l4), en borrspindel(12) uppbärande ett borrverktyg (13), en drivenhet (11)anordnad att rotera och axialförskjuta borrspindeln (12)mellan ett främre ändläge och ett bakre ändlàge, ettstyrsystem för styrning av drivenhetens (ll) arbete ochinnefattande ett första omkopplingsorgan (21) anordnat attaktiveras i borrspindelns (12) främre àndläge av ett förstakamelement (20) monterat pà borrspindeln (12), ett andraomkopplingsorgan (23) anordnat att aktiveras iborrspindelns (12) bakre ändläge av ett andra kamelement(22) monterat på borrspindeln (12), samt ett tredjeomkopplingsorgan (25) justerbart monterat på huset (l0,14)och anordnat att aktiveras av det första kamelementet (20)i ett visst önskat hastighetsomställningslâge hos borrspindeln (12). . A drilling machine comprising a housing (10, 14), a drilling spindle (12) supporting a drilling tool (13), a drive unit (11) arranged to rotate and axially displace the drilling spindle (12) between a front end position and a rear end position, a control system for controlling the operation of the drive unit (11) and comprising a first switching means (21) arranged to be activated in the front end position of the drilling spindle (12) by a first cam element (20) mounted on the drilling spindle (12), a second switching means (23) arranged to be activated in the rear end position of the drilling spindle (12) second cam element (22) mounted on the drill spindle (12), and a third switching means (25) adjustably mounted on the housing (10,14) and arranged to be activated by the first cam element (20) in a certain desired speed change position of the drill spindle (12).

Description

534 396 I avancerade borrmaskiner med numeriskt styrda arbetsfunktioner löses detta problem genom att tillämpa en hög matningshastighet fram till ett förutbestämt borrspindellàge som bestäms av vissa koordinater, varefter en korrekt och gynnsam matningshastighet tillämpas för att uppnå en korrekt genomförd borroperation. Detta innebär att en snabb frammatningshastighet av borrverktyget tillämpas fram till en position mycket nära intill borrobjektet utan påverkan av den korrekta och långsammare matningshastigheten som skall tillämpas under den följande borroperationen. Inga hårda anslagskrafter på borrverktyget uppstår, och följaktligen föreligger ingen risk för skador på borrverktyget. 534 396 In advanced drilling machines with numerically controlled working functions, this problem is solved by applying a high feed speed up to a predetermined drilling spindle position determined by certain coordinates, after which a correct and favorable feed speed is applied to achieve a correctly performed drilling operation. This means that a fast feed speed of the drilling tool is applied up to a position very close to the drilling object without affecting the correct and slower feed speed to be applied during the following drilling operation. No hard impact forces on the drilling tool occur, and consequently there is no risk of damage to the drilling tool.

I mindre avancerade borrmaskinsenheter där borroperationerna inte styrs av numeriskt baserade styrsystem föreligger emellertid fortfarande problemet med att öka effektiviteten genom reducering av cykeltiderna utan att få problem med skadade och/eller hårt slitna borrverktyg.However, in less advanced drilling machine units where the drilling operations are not controlled by numerically based control systems, there is still the problem of increasing efficiency by reducing cycle times without having problems with damaged and / or badly worn drilling tools.

Det är ett ändamål med uppfinningen att lösa ovan nämnda problem genom att skapa en borrmaskin med ett styrsystem som innefattar omkopplingsanordningar aktiverade via kamelement på borrspindeln för initiering av önskade förändringar i matningshastigheten hos borrspindeln.It is an object of the invention to solve the above-mentioned problems by creating a drilling machine with a control system which comprises switching devices activated via cam elements on the drilling spindle for initiating desired changes in the feed speed of the drilling spindle.

Ytterligare ändamål och fördelar med uppfinningen framgår av den följande beskrivningen och patentkraven.Further objects and advantages of the invention will become apparent from the following description and claims.

En föredragen utföringsform av uppfinningen beskrivs nedan under hänvisning till bifogade ritningar. 534 396 Ritningsförteckning: Fig. 1 visar en delvis skuren sidovy av en förkortad borrmaskin enligt uppfinningen och illustrerar borrspindeln i sitt bakre àndläge.A preferred embodiment of the invention is described below with reference to the accompanying drawings. 534 396 List of drawings: Fig. 1 shows a partially cut side view of a shortened drilling machine according to the invention and illustrates the drilling spindle in its rear end position.

Fig. 2 visar samma vy som Fig. 1, men illustrerar borrspindeln i sitt omställningsläge för matningshastigheten.Fig. 2 shows the same view as Fig. 1, but illustrates the drilling spindle in its adjustment position for the feed speed.

Fig. 3 visar samma vy som Fig. 1, men illustrerar borrspindeln i sitt främre ândläge.Fig. 3 shows the same view as Fig. 1, but illustrates the drill spindle in its front end position.

Borrmaskinen som illustreras i ritningsfigurerna är en portabel borrmaskin avsedd att fast anbringas mot ett borrobjekt. För detta ändamål är av borrmaskiner av denna typ alltid försedda med förankringsorgan för fast anslutning till borrobjektet, men för att inte komplicera illustrationerna har dessa förankringsorgan här utlämnats fràn ritningarna.The drilling machine illustrated in the drawing figures is a portable drilling machine intended to be fixed to a drilling object. For this purpose, drilling machines of this type are always provided with anchoring means for fixed connection to the drilling object, but in order not to complicate the illustrations, these anchoring means have here been omitted from the drawings.

Borrmaskinen som visas pà ritningarna innefattar ett hus 10, en pneumatiskt driven drivenhet 11 placerad i huset 10 och innefattande pneumatisk rotationsmotor, samt ett styrsystem för styrning av drivenhetens ll arbete och därigenom rörelsen hos en borrspindel 12. Den senare är roterbar och axiellt förskjutbar relativt huset 10 och uppbär vid sin främre ände ett borrverktyg 13. Borrspindeln 12 är försedd med en utvändig gänga 15 för samverkan med ett icke visat mutterstycke i drivenheten 11 för àstadkommande av axiella frammatnings- och matningsrörelser hos borrspindeln 12. Borrspindeln 12 är också försedd med ett par axiellt riktade spår 16 för överföring av rotationsrörelse fràn drivenheten 11 till borrspindeln 12.The drilling machine shown in the drawings comprises a housing 10, a pneumatically driven drive unit 11 located in the housing 10 and comprising a pneumatic rotary motor, and a control system for controlling the operation of the drive unit 11 and thereby the movement of a drilling spindle 12. The latter is rotatable and axially displaceable relative to the housing 10 and carries at its front end a drilling tool 13. The drilling spindle 12 is provided with an external thread 15 for co-operation with a nut piece (not shown) in the drive unit 11 to provide axial feed and feed movements of the drilling spindle 12. The drilling spindle 12 is also provided with a pair axially directed grooves 16 for transmitting rotational motion from the drive unit 11 to the drilling spindle 12.

Detta är en välkänd teknik för drivning av en borrspindel och beskrivs inte i ytterligare detalj. Huset 10 är försett 534 396 med ett täckrör 14 som innesluter och skyddar den bakre delen av borrspindeln 12.This is a well-known technique for driving a drill spindle and is not described in further detail. The housing 10 is provided 534 396 with a cover pipe 14 which encloses and protects the rear part of the drilling spindle 12.

Vid borrmaskiner av denna typ är huset 10 även försett med ett icke illustrerat halsparti för montering av en förankringsanordning. En sådan förankringsanordning är avsedd för fastmontering av borrmaskinen på borrobjektet för àstadkommande av en korrekt styrning av borrverktyget under borrningsarbetet. Eftersom denna utrustning inte utgör någon del av uppfinningen utan tillhör känd teknik, beskriven i exempelvis US Patent 4,591,299, beskrivs dessa inte i detalj i denna text.In drilling machines of this type, the housing 10 is also provided with an illustrated neck portion for mounting an anchoring device. Such an anchoring device is intended for mounting the drilling machine on the drilling object in order to achieve a correct control of the drilling tool during the drilling work. Since this equipment does not form part of the invention but belongs to the prior art, described in, for example, U.S. Patent 4,591,299, these are not described in detail in this text.

Drivenheten 11 innefattar en pneumatisk rotationsmotor 17 som förses med tryckluft via en anslutning 18 för en tryckluftledning vid husets 10 bakre ände, samt en pådragsventil manövrerad via en tangent 19. Drivenheten 11 innehåller vidare en krafttransmission uppvisande hastighetsstyrande organ genom vilka borrspindelns 12 rätlinjiga rörelser styrs. De hastighetsstyrande organen innefattar en växelanordning som är omstàllbar mellan ett höghastighetsläge för snabbframmatning av borrspindeln och ett làghastighetsläge för borrspindelmatningen under borrningsarbete. Eftersom krafttransmissionen och de hastighetsstyrande organen i sig inte utgör någon del av uppfinningen beskrivs dessa inte i ytterligare detalj.The drive unit 11 comprises a pneumatic rotary motor 17 which is supplied with compressed air via a connection 18 for a compressed air line at the rear end of the housing 10, and a service valve operated via a key 19. The drive unit 11 further comprises a power transmission having speed control means through which the drilling spindle 12 controls rectilinear movements. The speed control means comprise a gear device which is adjustable between a high speed position for fast feeding of the drilling spindle and a low speed position for the drilling spindle feeding during drilling work. Since the power transmission and the speed control means do not in themselves form part of the invention, these are not described in further detail.

Styrsystemet innehåller ventiler och andra pneumatiska komponenter för styrning av motorns arbete och de hastighetsstyrande organen. För styrning av borrspindelns axiella rörelse är anordnade omkopplingsorgan vilka år aktiverade av kamelement applicerade på borrspindeln.The control system contains valves and other pneumatic components for controlling the operation of the engine and the speed control means. To control the axial movement of the drilling spindle, switching means are provided which are activated by cam elements applied to the drilling spindle.

Sålunda är på den bakre delen av borrspindeln 12 justerbart 534 395 monterat ett första kamelement 20 vilket är anordnat att aktivera ett första omkopplingsorgan 21 monterat på täckröret 14 för bestämning av borrdjupet eller borrspindelns 12 främre ändläge. Detta första omkopplingsorgan 21 är låst relativt täckröret 14 medelst en skruv 24. Se Fig. 3. Det första kamelementet 20 utgörs av en mutter som är pàgängad pà borrspindeln 12 och làsbar i önskat läge genom en làsskruv 19 som samverkar med ett av de axiella spåren 16, varigenom det främre ändläget hos borrspindeln 12 ställs in. Det främre ändläget bestäms av det avsedda hàldjupet hos det borrade hålet eller tjockleken hos det aktuella objektet vid genomborrning.Thus, on the rear part of the drilling spindle 12 adjustable 534 395 is mounted a first cam element 20 which is arranged to activate a first switching means 21 mounted on the cover pipe 14 for determining the drilling depth or the front end position of the drilling spindle 12. This first switching means 21 is locked relative to the cover pipe 14 by means of a screw 24. See Fig. 3. The first cam element 20 consists of a nut which is threaded on the drill spindle 12 and can be locked in the desired position by a locking screw 19 which cooperates with one of the axial grooves. 16, whereby the front end position of the drilling spindle 12 is adjusted. The front end position is determined by the intended hole depth of the drilled hole or the thickness of the object in question during drilling.

På en främre del av borrspindeln 12 är fast monterat ett andra kamelement 22 vilket är anordnat att aktivera ett andra omkopplingsorgan 23 monterat pà huset 10. Det andra kamelementet 22 bestämmer i samverkan med omkopplingsorganet 23 borrspindelns 12 fullt tillbakadragna läge eller det bakre ändläget hos borrspindeln. Se Fig. 1.A second cam element 22 is fixedly mounted on a front part of the drilling spindle 12, which is arranged to activate a second switching means 23 mounted on the housing 10. The second cam element 22 determines in cooperation with the switching means 23 the fully retracted position of the drilling spindle 12 or the rear end position of the drilling spindle. See Fig. 1.

Pà husets 10 täckrör 14 finns ett justerbart monterat tredje omkopplingsorgan 25. Detta tredje omkopplingsorgan 25 är anordnat att aktiveras av det första kamelementet 20 i ett visst axiellt läge hos borrspindeln 12 för att därigenom generera en signal för aktivering av de hastighetsstyrande organen och àstadkommande av en förändring av matningshastigheten hos borrspindeln 12.On the cover pipe 14 of the housing 10 there is an adjustably mounted third switching means 25. This third switching means 25 is arranged to be activated by the first cam element 20 in a certain axial position of the drilling spindle 12, thereby generating a signal for activating the speed controlling means and providing a changing the feed rate of the drill spindle 12.

Detta tredje omkopplingsorgan 25 är justerbart längs täckröret 14 och lásbart via en skruv 26 i ett läge hos borrspindeln 12 i vilket borrverktyget 13 just ska träffa borrobjektet. Genom att aktivera det tredje omkopplingsorganet 25 i just detta läge hos borrspindeln 12 kan matningshastigheten ändras från en hög hastighet under 534 395 frammatningen av borrspindeln 12 mot borrobjektet till en låg korrekt matningshastighet lämplig för den aktuella borroperationen. Se Fig. 2.This third switching member 25 is adjustable along the cover pipe 14 and lockable via a screw 26 in a position of the drilling spindle 12 in which the drilling tool 13 is just to hit the drilling object. By activating the third switching means 25 in this very position of the drilling spindle 12, the feed rate can be changed from a high speed during the advancement of the drilling spindle 12 towards the drilling object to a low correct feed rate suitable for the actual drilling operation. See Fig. 2.

En borrcykel startas med borrspindeln 12 i det läge som illustreras i Fig. 3a, dvs. med borrspindeln 12 i sitt fullt tillbakadragna läge. Borroperationen startas genom att styrsystemet aktiveras av operatören, varvid drivenheten startar rotation och frammatning av borrspindeln 12. Styrsystemet är inställt att pàföra borrspindeln 12 en hög frammatningshastighet under angöringsfasen, dvs. då borrverktyget 13 förskjuts mot borrobjektet. Detta resulterar i en snabb initialfas av borroperationen. Dà emellertid borrverktyget 13 kommer nära borrobjektet kommer det första kamelementet 20 i kontakt med och aktiverar det tredje omkopplingsorganet 25, vilket innebär att en signal genereras av den senare för åstadkommande av hastighetsväxling hos de hastighetsstyrande organen i styrsystemet. Detta läge illustreras i Fig. 2. Sà, just innan borrverktyget 13 kommer i kontakt med borrobjektets yta reduceras matningshastigheten hos borrspindeln 12 till en långsammare hastighet lämplig för den aktuella borroperationen.A drilling cycle is started with the drilling spindle 12 in the position illustrated in Fig. 3a, i.e. with the drill spindle 12 in its fully retracted position. The drilling operation is started by activating the control system by the operator, whereby the drive unit starts rotation and feeding of the drilling spindle 12. The control system is set to apply a high feed speed to the drilling spindle 12 during the mooring phase, ie. when the drilling tool 13 is displaced towards the drilling object. This results in a rapid initial phase of the drilling operation. However, when the drilling tool 13 comes close to the drilling object, the first cam element 20 comes into contact with and activates the third switching means 25, which means that a signal is generated by the latter for effecting speed change of the speed controlling means in the control system. This position is illustrated in Fig. 2. So, just before the drilling tool 13 comes into contact with the surface of the drilling object, the feed speed of the drilling spindle 12 is reduced to a slower speed suitable for the actual drilling operation.

Härefter utförs borroperationen tills det önskade borrdjupet uppnås. Det främre ändläget hos borrspindeln 12 bestäms av inställningen av det första kamelementet 20 pà borrspindeln 12, och då kamelementet 20 kommer i kontakt med det första omkopplingsorganet 21 genereras en signal för initiering av ett stopp för den axiella matningsrörelsen och pàbörjan av en reverseringsrörelse hos borrspindeln 12. Se Fig. 3. 534 396 Det bör noteras att istället för en vàxelanordning kan de hastighetsstyrande organen bestà av hastighetsomställande organ för motorn, speciellt lämpligt vid elektriskt drivna borrmaskiner. I sådana utföringsformer av uppfinningen utgörs omkopplingsorganen av elektriska brytare istället för pneumatiska ventiler för samverkan med kamelementen pá borrspindeln.Thereafter, the drilling operation is performed until the desired drilling depth is reached. The front end position of the drilling spindle 12 is determined by the setting of the first cam element 20 on the drilling spindle 12, and when the cam element 20 comes into contact with the first switching means 21, a signal is generated for initiating a stop of the axial feed movement and initiating a reversing movement of the drilling spindle 12. See Fig. 3. 534 396 It should be noted that instead of a gear unit, the speed control means may consist of speed change means for the motor, especially suitable for electrically driven drilling machines. In such embodiments of the invention, the switching means consist of electrical switches instead of pneumatic valves for co-operation with the cam elements on the drilling spindle.

Claims (5)

P20-09710-091217 Claims.
1. Power drill comprising a housing (lO,l4), a drillspindle (12) carrying a drill bit (13) and being rotatableand longitudinally moveable relative to the housing(lO,l4), a drive unit (ll) arranged to rotate and move thedrill spindle (12) longitudinally between a forward endposition and a rear end position, a control system arrangedto govern the operation of the drive unit (ll) andcomprising a first switching device (21) arranged to beactivated in the forward end position of the drill spindle(12) by a first cam element (20) attached to the drillspindle (12), and a second switching device (23) arrangedto be activated in the rear end position of the drillspindle (12) by a second cam element (22) attached to thedrill spindle (12), c h a r a c t e r i z e d in that 0 said drive unit (ll) comprises a speed controllingmeans for shifting the speed of the longitudinal drillspindle movement between a rapid advance speed and a slower drilling feed speed, 0 a third switching device (25) is comprised in thecontrol system and adjustably supported on the housing(lO,l4) for setting in various positions, 0 said third switching device (25) is arranged to beengaged by said first cam element (20) and arranged tobe set in a certain position on the housing (lO,l4) soas to accomplish shifting of the longitudinal movementspeed of the drill spindle (12) from the rapid advancespeed to the slower drill feed speed when engaged bysaid first cam element (20) in a desired longitudinal position of the drill spindle (12) wherein the drill P20-09710-091217 bit (13) is just about to engage an object to bedrilled.
2. Power drill according to claim l, wherein thedrive unit (ll) comprises a pneumatic motor, said controlsystem comprises pneumatic components arranged to controlthe operation of the motor, and said first, second, and third switching devices (2l,23,25) are pneumatic valves.
3. Power drill according to claim l or 2, whereinsaid speed controlling means comprises a mechanical gearingshiftable between said rapid advance speed and said slower drilling feed speed.
4. Power drill according to anyone of claims l-3,wherein said first cam element (20) is adjustably attachedto the drill spindle (12) and arranged to be set in aposition on the drill spindle (12) wherein said firstswitching device (21) in engaged as the drill spindle (12) occupies its forward end position.
5. Power drill according to anyone of claims l-4,wherein the housing (lO,l4) comprises a cover tube (14)enclosing the rear portion of the drill spindle (12), andsaid third switching device (25) is adjustably mounted on said cover tube (14).
SE0901578A 2009-12-18 2009-12-18 Drilling machine with adjustable feed speed SE534396C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0901578A SE534396C2 (en) 2009-12-18 2009-12-18 Drilling machine with adjustable feed speed
PCT/EP2010/070053 WO2011073381A1 (en) 2009-12-18 2010-12-17 Power drill with advance speed shifting means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0901578A SE534396C2 (en) 2009-12-18 2009-12-18 Drilling machine with adjustable feed speed

Publications (2)

Publication Number Publication Date
SE0901578A1 SE0901578A1 (en) 2011-06-19
SE534396C2 true SE534396C2 (en) 2011-08-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
SE0901578A SE534396C2 (en) 2009-12-18 2009-12-18 Drilling machine with adjustable feed speed

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Country Link
SE (1) SE534396C2 (en)
WO (1) WO2011073381A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB788010A (en) * 1955-05-13 1957-12-18 Albert Honsberg Improvements in or relating to boring, drilling and screw cutting machines, particularly a boring, drilling, or screw cutting unit
GB965937A (en) * 1962-01-02 1964-08-06 Ford Motor Co An improved drill feed unit
GB1052472A (en) * 1965-09-09
US3885635A (en) * 1974-04-19 1975-05-27 Bendix Corp Two-speed mechanical quill feed and spindle drive mechanism for a machine tool
US4591299A (en) 1984-05-21 1986-05-27 Dresser Industries, Inc. Rapid feed apparatus for automatic feed drills or the like

Also Published As

Publication number Publication date
WO2011073381A1 (en) 2011-06-23
SE0901578A1 (en) 2011-06-19

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