WO2001045908A1 - Hammer supported drill - Google Patents
Hammer supported drill Download PDFInfo
- Publication number
- WO2001045908A1 WO2001045908A1 PCT/DE2000/004084 DE0004084W WO0145908A1 WO 2001045908 A1 WO2001045908 A1 WO 2001045908A1 DE 0004084 W DE0004084 W DE 0004084W WO 0145908 A1 WO0145908 A1 WO 0145908A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impact
- frequency
- rotational frequency
- hand drill
- notch
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/06—Means for driving the impulse member
- B25D2211/068—Crank-actuated impulse-driving mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0023—Tools having a percussion-and-rotation mode
- B25D2216/003—Tools having a percussion-and-rotation mode comprising de-phasing of percussion and rotation
Definitions
- the invention is based on an impact-supported hand drill according to the preamble of claim 1.
- the hand drill has a housing in which an electric drive motor cooperating with a control device is arranged. With the drive motor, a tool holder can be driven via a gear with a rotational frequency and via a hammer mechanism with a beat frequency.
- the electric drive motor be coupled to a measuring device, via which a reaction torque can be detected.
- the control device comprises an evaluation unit which is connected to the measuring device for the reaction torque and by means of which the rotational frequency of the tool holder can be controlled in this way is that the reaction torque measured on the drive motor during operation is maximum.
- the invention is based on an impact-supported hand drill with a tool holder for holding at least one tool, which can be driven by at least one motor with at least one rotational frequency and with at least one impact frequency.
- the rotational frequency and the impact frequency are coordinated with one another in such a way that at a given rotational frequency one at one Impact spanned angular range between a notch and an adjacent notch in the circumferential direction with subsequent
- Impacts with the same notch angle spacing can be processed as with a lower comparison rotational frequency. Once the angular range has been processed, the same processing sequence takes place starting from a starting position.
- a proven notch pattern can be transferred to higher rotational frequencies and, with small drilling diameters, in particular below 10 mm, a high conveying capacity and thus a large axial drilling progress can be achieved.
- tables can advantageously be drawn up from which for certain ones Notch pictures different rotational frequencies can be read out or corresponding formulas can be used.
- the rotational frequency and the impact frequency can be in a fixed relationship to one another, for example in the case of a small, inexpensive hand-held drill which, due to the increased rotational frequency, can also be advantageously used for cutting drilling after the hammer mechanism has been switched off, for example in materials such as wood, plastic, Metal etc.
- At least the rotational frequency can be changed independently of the stroke frequency.
- one or more proven notch patterns can be achieved at different turning frequencies with a hand impact drill.
- the rotational frequency of the hand drill can advantageously be set to different drill diameters and a particularly large axial drilling progress can be achieved with different drilling diameters.
- the beat frequency can also be changed or can advantageously be kept constant, as a result of which inexpensive, sophisticated striking mechanisms can be used.
- a rotational frequency that can be set independently of the stroke frequency can be determined by various seeming constructions can be achieved, such as, for example, being structurally simple by means of an adjustable gear and / or in that the tool holder can be driven by at least one first motor and driven by at least one second motor.
- the rotational frequency can be set manually or, advantageously, can be configured automatically via a control device depending on at least one parameter of the tool.
- the comfort of the hand impact drill can be increased and an incorrect setting can be avoided.
- Various parameters can be used to determine an advantageous rotational frequency, such as, for example, certain codes which are introduced into the tools and read out by the control device.
- the control device can record a diameter, in particular a shank diameter of the tool, the number of cutting edges and / or an axial drilling progress as a parameter in a cost-effective and structurally simple manner.
- a tool with a base body for use in a hand drill according to the invention which has at least one conveying helix introduced in the outer circumference, an outer diameter and a core diameter determined by the conveying helix, the main body having a larger core diameter in comparison with a standard base body with the same outer diameter has.
- the tool advantageously has a shaft which is coded in accordance with the tool holder, for example with a special cross-sectional area with recesses, projections, etc.
- Fig. 1 is a schematic representation of a hand impact drill
- Fig. 2 to 5 notch sequences at different rotational frequencies
- Fig. 6 shows a drill in the longitudinal direction from the front.
- FIG. 1 shows a hand-held hammer drill with a tool holder 10 for receiving a drill, which can be driven with an electric motor 14 arranged in a housing 40 via a gear 24 and a countershaft 25 with a plurality of rotational frequencies and via a pneumatic hammer mechanism 42 with a stroke frequency.
- the striking mechanism 42 has an excitation piston 46 which is guided in a spindle tube 44 and which acts via an air cushion 48, a flying piston 50 and a striker 52 on a shaft end of the drill.
- FIGS. 2 to 5 show notch sequences of the double-edged drill at different rotational frequencies and at a constant impact frequency.
- drills with more or fewer cutting edges and / or with other cutting shapes can also be used, for example with pin cutting edges, etc.
- a first notch 18 is created by a first cutting edge 62 and a second adjacent notch 20 by a second cutting edge 64 of the drill, which span an angular range ⁇ of 180 ° (FIGS. 2 and 6).
- ⁇ 360 ° / ⁇ ( ⁇ : number of cutting edges)
- the drill has rotated further by an angle ⁇ in the direction of 58 and, at a rotational frequency of 870 1 / min, there is a proven notch angle distance ⁇ of 64.8 ° between the first notch 18 and a notch 54 is introduced in a first quadrant 56.
- the angular range ⁇ is machined in the direction of rotation 58, namely that the first cutting edge 62 produces a further notch, not shown in more detail, which has a distance ⁇ to the notch 54 in the direction of rotation 58, etc.
- FIG. 3 to 5 show notch sequences with the same stroke frequency but with higher rotational frequencies than in FIG. 2, the rotational frequency present in FIG. 2 being referred to below as the comparison rotational frequency.
- 3 to 5 are based on a first blow as shown in FIG. 2, in which a notch 18 and a notch 20 are formed.
- the rotational frequencies and the impact frequency are matched to one another in such a way that the spanned angular range ⁇ can always be processed with the same notch angle spacings ⁇ as in the smaller comparison rotational frequency in FIG. 2.
- the drill rotates by an angle ⁇ i in a time interval between two impacts , which is greater than 90 °, so that the proven notch angle distance ⁇ occurs in the angular range ⁇ in a second quadrant 60 between a notch 54 of the first cutting edge 62 of the drill and the second notch 20.
- the drill rotates at a rotational frequency of 1547 rpm.
- the angular range ⁇ becomes opposite to that Machined the direction of rotation 58 of the drill, and in a subsequent stroke the drill produces with its second cutting edge 64 a further notch, not shown in more detail, with a distance ⁇ in the direction of rotation 58 in front of the notch 54, etc.
- the drill rotates in an interval between two strokes by an angle ⁇ 2 , which is greater than 180 °, so that the drill with its second cutting edge 64 in the first quadrant 56 creates a notch 54 with a distance ⁇ to the notch 18 ,
- the drill rotates at a speed of 3287 1 / min.
- the angular range ⁇ is machined in the direction of rotation 58 as in FIG. 2, namely that the first cutting edge 62 of the drill produces a further notch, not shown in more detail, which has a distance ⁇ to the notch 54 in the direction of rotation 58, etc.
- the drill rotates by an angle ⁇ which is greater than 270 ° in a time interval between two impacts, so that the drill with its second cutting edge 64 produces a notch 54 in the second quadrant 60 at a distance from the notch 20 ,
- the drill rotates at a rotation frequency of 3963 1 / min.
- the angular range ⁇ is machined against the direction of rotation 58 as in FIG. 3, and in fact the second cutting edge 64 of the drill produces a further notch, not shown in more detail, with a distance ⁇ in the direction of rotation 58 in front of the notch 54, etc.
- the rotational frequency can be increased so that the angle ⁇ n increases by 360 ° or by a multiple of 360 °.
- the rotational frequency can be set via the gear 24 independently of the impact frequency, which has a constant value.
- a shaft diameter 28 is detected by a control device 26 via a measuring device 16 as a parameter, depending on which the control device 26 automatically sets a certain rotational frequency.
- drills can be used in the hand-held drilling machine, and drills specially designed for the hand-held drilling machine, which have a base body 12 with a shaft 38 correspondingly coded for the tool holder 10
- Shaft 38 webs 22 are formed which, when the drill is inserted into the tool holder 10, engage in corresponding recesses in the tool holder 10 (not shown) (FIG. 6).
- the webs 22 prevent the special drills from being used in conventional hand impact drills.
- the drill designed for the hand-held boring machine according to the invention, shown in FIG. 6, has in the outer circumference of its base body 12 two inserted conveying coils 30, 32, an outer diameter 34 and a core diameter 36 which is also determined by the conveying turning 30, 32.
- the core diameter 36 is larger than a core diameter 66 of a standard drill with the same outer diameter 34.
- the drill is therefore more stable than a corresponding standard drill and, due to the higher rotational frequency according to the invention, with a proven notch pattern, a high delivery rate can be achieved by the feed coils 30, 32 and a large axial drilling progress.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001546439A JP2004509772A (en) | 1999-12-21 | 2000-11-18 | Blow assisted hand drilling machine |
EP00984895A EP1242216B1 (en) | 1999-12-21 | 2000-11-18 | Percussion supported hand drill |
DE50013476T DE50013476D1 (en) | 1999-12-21 | 2000-11-18 | IMPACT ASSISTED HAND DRILLING MACHINE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19961586.1 | 1999-12-21 | ||
DE1999161586 DE19961586A1 (en) | 1999-12-21 | 1999-12-21 | Impact-assisted hand drill |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001045908A1 true WO2001045908A1 (en) | 2001-06-28 |
WO2001045908A9 WO2001045908A9 (en) | 2004-04-29 |
Family
ID=7933506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/004084 WO2001045908A1 (en) | 1999-12-21 | 2000-11-18 | Hammer supported drill |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1242216B1 (en) |
JP (1) | JP2004509772A (en) |
CN (1) | CN100346935C (en) |
DE (2) | DE19961586A1 (en) |
WO (1) | WO2001045908A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180370008A1 (en) * | 2015-12-14 | 2018-12-27 | Hilti Aktiengesellschaft | Control Method and Portable Power Tool |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4815362B2 (en) * | 2007-02-06 | 2011-11-16 | 株式会社マキタ | Impact type work tool |
DE102013202248A1 (en) * | 2012-05-29 | 2013-12-05 | Robert Bosch Gmbh | Tool device for hand-held power tool used in drilling hammer, has surface profiles which are provided in region of sliding connection of guide elements and sliding elements for transferring fluid |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0018465A1 (en) * | 1979-01-29 | 1980-11-12 | Black & Decker Inc. | Control device and method of controlling the rotational speed of a portable power tool |
US4335295A (en) * | 1979-05-09 | 1982-06-15 | Fowler Gary J | Method of marking a metal device |
US4462467A (en) * | 1981-11-09 | 1984-07-31 | Hilti Aktiengesellschaft | Percussion drill machine |
JPS60177809A (en) * | 1984-02-23 | 1985-09-11 | Sumitomo Electric Ind Ltd | Drill |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3228304A1 (en) * | 1982-07-29 | 1984-02-02 | Robert Bosch Gmbh, 7000 Stuttgart | CONTROL DEVICE FOR A MACHINE TOOL |
DK30592D0 (en) * | 1992-03-06 | 1992-03-06 | Joran Bor A S | DRILLING |
DK0733443T3 (en) * | 1995-03-24 | 1998-07-20 | Hilti Ag | Device for transferring pulse-like blows to a continuously rotating tool |
DE19534850A1 (en) * | 1995-09-20 | 1997-03-27 | Hilti Ag | Impact-supported hand drill |
DE29722002U1 (en) * | 1997-12-15 | 1998-02-05 | Werkzeugfabrik Gmbh Koenigsee | Twist drill |
-
1999
- 1999-12-21 DE DE1999161586 patent/DE19961586A1/en not_active Ceased
-
2000
- 2000-11-18 CN CNB008175586A patent/CN100346935C/en not_active Expired - Fee Related
- 2000-11-18 DE DE50013476T patent/DE50013476D1/en not_active Expired - Lifetime
- 2000-11-18 EP EP00984895A patent/EP1242216B1/en not_active Expired - Lifetime
- 2000-11-18 JP JP2001546439A patent/JP2004509772A/en not_active Withdrawn
- 2000-11-18 WO PCT/DE2000/004084 patent/WO2001045908A1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0018465A1 (en) * | 1979-01-29 | 1980-11-12 | Black & Decker Inc. | Control device and method of controlling the rotational speed of a portable power tool |
US4335295A (en) * | 1979-05-09 | 1982-06-15 | Fowler Gary J | Method of marking a metal device |
US4462467A (en) * | 1981-11-09 | 1984-07-31 | Hilti Aktiengesellschaft | Percussion drill machine |
JPS60177809A (en) * | 1984-02-23 | 1985-09-11 | Sumitomo Electric Ind Ltd | Drill |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 018 (M - 448) 24 January 1986 (1986-01-24) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180370008A1 (en) * | 2015-12-14 | 2018-12-27 | Hilti Aktiengesellschaft | Control Method and Portable Power Tool |
US10906166B2 (en) * | 2015-12-14 | 2021-02-02 | Hilti Aktiengesellschaft | Control method and portable power tool |
Also Published As
Publication number | Publication date |
---|---|
DE19961586A1 (en) | 2001-07-05 |
JP2004509772A (en) | 2004-04-02 |
EP1242216A1 (en) | 2002-09-25 |
CN1545443A (en) | 2004-11-10 |
EP1242216B1 (en) | 2006-09-13 |
DE50013476D1 (en) | 2006-10-26 |
CN100346935C (en) | 2007-11-07 |
WO2001045908A9 (en) | 2004-04-29 |
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