GB2486805A - Measuring and dust extraction device for a power tool - Google Patents

Measuring and dust extraction device for a power tool Download PDF

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Publication number
GB2486805A
GB2486805A GB1121903.7A GB201121903A GB2486805A GB 2486805 A GB2486805 A GB 2486805A GB 201121903 A GB201121903 A GB 201121903A GB 2486805 A GB2486805 A GB 2486805A
Authority
GB
United Kingdom
Prior art keywords
measuring
dust
extraction device
dust extraction
housing part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1121903.7A
Other versions
GB201121903D0 (en
Inventor
Steffen Wuensch
Juergen Hesse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB201121903D0 publication Critical patent/GB201121903D0/en
Publication of GB2486805A publication Critical patent/GB2486805A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B23B47/34—Arrangements for removing chips out of the holes made; Chip- breaking arrangements attached to the tool
    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042—Devices for removing chips
    • B23Q11/0046—Devices for removing chips by sucking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
    • B23B49/003—Stops attached to drilling tools, tool holders or drilling machines
    • B23B49/006—Attached to drilling machines
    • B23B49/008—Attached to the nose of the drilling machines
    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/003—Stops for limiting depth in rotary hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/048—Devices to regulate the depth of cut
    • B23B2260/0487—Depth indicators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

The measuring and dust extraction device 5 is for measuring the machining depth and for dust extraction for a power tool 1, such as a drill. The device includes a support housing 6, which is to be connected to a housing 2 of the power tool, and a dust conducting duct system. A measuring system (18, Figure 3) is for measuring the machining depth. A housing part 7 is held adjustably on the support housing and its adjusting movement correlates with the machining depth. The measuring system may include a magnetic transducer and an associated sensor.

Description

Description Title
Measurin and dust extraction device for a power tool The invention relates to a measuring and dust extraction device for measuring the machining depth and for dust extraction for a power tool, in particular for a power drill.
Prior art
DE 103 46 207 Al describes a power drill which is provided with a dust catching container for receiving the drilling dust produced when machining the workpiece, which container can be connected to the housing of the power drill. For this purpose, the dust catching container is provided with a container connecting piece which can be plugged onto an associated blowing-out connecting piece on the housing.
During the operation of the electric drive motor of the power drill, a suction flow is generated via a fan wheel and conveys the dust produced into the dust catching container via a dust conducting system.
Disclosure of the invention
The object on which the invention is based is to create, by simple constructional measures, a measuring and dust extraction device by which efficient dust extraction and at the same time measurement of the machining depth when machining the workpiece is possible.
This object is achieved, according to the invention, by the features of Claim 1. The subclaims specify expedient developments.
S The measuring and dust extraction device is designed as an assembly which is formed separately from the power tool but can be connected to the power tool. The measuring and dust extraction device has a dual function, namely, on the one hand, the measurement of the machining depth when machining the workpiece by means of the tool of the power tool and, on the other hand, the dust extraction of the dust or abraded particles produced when machining the workpiece. By virtue of the design as an independent assembly, the measuring and dust extraction device can be disconnected from and reconnected to the power tool without loss of function of the latter.
The measuring and dust extraction device has a support housing, with respect to which a further housing part is adjustably held, the support housing in the mounted position being firmly connected to the housing of the power tool. A dust conducting duct system for removing dust is situated in the support housing and the adjustable housing part. Furthermore, a measuring system for measuring the machining depth is accommodated in or on the support housing and the adjustable housing part, the measuring system being able to measure the currently reached depth to which the tool of the power tool penetrates into the The adjusting movement of the adjustable housing part correlates with the machining depth, so that merely the adjusting movement of the housing part concerned has to be determined via the measuring system of the measuring and dust extraction device, in order to be able to infer the machining depth therefrom. Advantageously, the measuring and dust extraction device is designed such that there is a linear relationship between the adjusting movement of the adjustable housing part and the machining depth. In principle, however, nonlinear relationships are also possible, provided that there is a clear correspondence between the different positions of the adjustable housing part and the machining depth.
Advantageously, in the measuring and dust extraction device it is provided that a duct of the dust conducting duct system is led through the adjustable housing part. This makes it possible to remove the dust at the place where it is produced, that is to say at the point of machining between tool and workpiece, with the aid of an air flow conveyed through the adjustable housing part. The duct in the adjustable housing part advantageously communicates with a further duct in the fixed housing part, that is to say the support housing, this duct being connectible in the region of its mouth to an air conducting system in the power tool. For this purpose, the mouth of the duct preferably extends into the edge region of the fixed housing part.
In this way, the power of the drive motor, in particular of an electric drive motor of the power tool, can be used to generate an air flow, preferably by driving a fan wheel in the power tool, the air flow communicating, via the connection, with the dust conducting duct system in the measuring and dust extraction device. It is possible to generate both a sucking air flow, by which a negative pressure in the dust conducting duct system is generated, and a blowing air flow for generating a positive pressure in the dust conducting duct system. According to an advantageous embodiment, it is provided that a sucking air flow is generated which is suitable for sucking dust produced away from the machining region. In the case of a blowing air flow with a positive pressure in the dust conducting duct system, in contrast, an air flow is directed at the machining region which blows away the dust produced.
In particular in a combination with a sucking air flow which can be generated by the power tool, a dust collecting container is arranged in the measuring and dust extraction device, which container is located in the dust conducting duct system and in which sucked-away dust particles are caught and stored. The dust collecting container can be situated both in the adjustable housing part and in the fixed housing part. AccOrding to an advantageous embodiment, it is provided that the dust collecting container is arranged adjacent to the free end of the adjustable housing part facing away from the fixed support housing and is thus situated in the immediate vicinity of the tool and the workpiece-machining position, which has the advantage that the swarf on being sucked away only has to be transported over a short distance until it reaches the dust collecting container.
According to a further expedient embodiment, the adjustable housing part is mounted axially displaceably on the fixed housing part. The adjusting movement is thus an axial, translational movement, from which the machining depth can be inferred. In principle, however, rotary or pivoting
S
movements of the adjustable housing part with respect to the fixed housing part are also possible.
The adjustable housing part is advantageously urged into its elongated position. For this purpose, there is arranged in the measuring and dust extraction device a spring element which urges the adjustable housing part into the deflected position. When machining the workpiece, with increasing machining depth the adjustable housing part is adjusted in the direction of the fixed housing part against the force of the spring element, and this can be registered via the measuring system. Advantageously, a display element for displaying the adjusting movement of the adjustable housing part is provided, preferably the machining depth being displayed in the display unit. The display unit is expediently situated on the fixed housing part.
In principle, various types of measuring systems are possible for measuring the relative movement between fixed and adjustable housing part. According to an advantageous embodiment, the measuring system is of magnetic design and has a magnetic transducer and an associated sensor. The transducer is advantageously situated on the adjustable housing part, the sensor on the fixed housing part. For example, a magnetoresistive measuring method is employed, the magnetic length measurement of which is particularly well suited to use on transportable measuring and dust extraction devices by virtue of the ruggedness, accuracy, the space-saving construction and the low energy requirement, and also by virtue of favourable manufacturing costs. The magnetoresistive measuring system comprises a magnetic sensor and a magnetic strip, the magnetic sensor, which is preferably arranged on the fixed housing part, consisting essentially of a resistance measuring bridge, from which the path-dependent counting pulses for signal conditioning electronics are formed. The magnetic strip is arranged in the adjusting direction on the adjustable housing part, so that magnetic pulses are generated during the adjusting movement and are recorded in the sensor.
Further advantages and expedient embodiments can be gathered from the further claims, the description of the figures, and the drawings, in which: Fig. 1 shows a perspective view of a measuring and dust extraction device which is connected to the housing of a hand-held power drill, Fig. 2 shows the measuring and dust extraction device in a side view, Fig. 3 shows the measuring and dust extraction device in a perspective individual illustration.
In the figures, identical components are provided with the same reference symbols.
The power tool to which the measuring and dust extraction device can be connected is, in particular, a hand-held power tool, preferably with electric motor drive.
Particularly advantageously, the measuring and dust extraction device can be employed for a hand-held power drill.
Furthermore, it may be expedient to provide a calibrating device for setting the zero position of the adjustable housing part of the measuring and dust extraction device.
The calibrating device can be part of the measuring system, for example such that a desired zero position of the adjustable housing part can be set via the measuring system. For example, the adjustable housing part is adjusted, or the zero position electronically set, such that the free end side of the adjustable housing part coincides with the tip of the tool in the starting position, that is to say before starting the machining of the workpiece.
Illustrated in Fig. 1 as the hand-held power tool is a power drill 1 which has a housing 2 with electronic drive motor and gear mechanism accommodated therein. The drive movement is transmitted via a drill chuck 3 to a drill 4 accommodated in the drill chuck and forming the tool of the power tool.
Furthermore, there is provided a measuring and dust extraction device 5 which is designed as an assembly formed separately from the power drill 1 but connectible to the housing 2 of the power tool 1. The measuring and dust extraction device 5 comprises as fixed housing part a support housing 6 which is to be connected to the housing 2 of the power tool, and an adjustable housing part 7 which is mounted so as to be translationally displaceable with respect to the support housing 6. The displacing movement of the adjustable housing part 7 runs parallel to the machining direction of the power tool, in the mounted position of the measuring and dust extraction device 5, in the present case parallel to the longitudinal axis of the drill 4.
As can be gathered from Fig. 1 in conjunction with Figs. 2 and 3, the support housing 6 has two tubular housing sections 8 and 9 which extend in the axial longitudinal direction. The two tubular housing sections 8 and 9 run parallel to one another and each form the outside of the support housing. The first tubular housing section 8 is designed as a duct, through which suction air is conveyed.
The second tubular housing section 9 on the support housing 6 accommodates a compression spring which urges the adjustable housing part 7 into the elongated position.
The adjustable housing part 7 is provided, analogously to the support housing 6, with two tubular housing sections 10 and 11 which run coaxially to the housing sections 8 and 9, respectively, arranged on the support housing 6. At their end side facing away fron the supporting housing 6, the two housing sections 10 and 11 of the adjustable housing part 7 carry a suction housing 12, on which, on the one hand, a housing projection 13 with an aperture running in the axial direction is integrally formed and, on the other hand, a dust collecting container 14 is detachably fastened. The aperture 15 in the housing projection 13 is oriented coaxially to the drill 4, which is passed through the aperture 15 when machining the workpiece.
The tubular housing section 10 on the adjustable housing part 7 is also formed as a duct, which is flow-connected to the duct in the tubular housing section 8 in the support housing 6. On the side located axially opposite the support housing 6, the duct in the housing section 10 is connected to the dust collecting container 14. The duct in the housing section 8 has a mouth region 16 which is situated on the support housing 6 on the side located axially opposite the suction housing 12. The mouth region 16 is directed upwards and situated, in the mounted position of the measuring and dust extraction device, which is connectible to the underside of the housing 2 of the power tool 1, in contact with an air conducting system in the power tool. As a result, it is possible to convey an air flow generated in the power tool into the air conducting system of the measuring and dust extraction device, or subject the air conducting system to a negative pressure.
For a flow-tight connection to the housing of the power tool, the support housing 6 has a housing contour 24 which surrounds the mouth region 16 and, in the mounted position, bears directly on the housing of the power tool. In the exemplary embodiment, the air or dust conducting system in the measuring and dust extraction device is subjected to a negative pressure which is generated in the power tool.
This negative pressure is transmitted via the ducts in the tubular housing sections 8 and 10 to the dust collecting container 14, so that air containing dust particles which are produced when machining the workpiece is sucked in via the uncleaned-air side of the dust collecting container.
The uncleaned-air side of the dust collecting container 14 is the end side of the dust collecting container facing away from the tubular housing sections 10 and 11.
To connect the support housing 6 to the housing of the power tool, a lever mechanism 17 is arranged on the support housing directly adjacent to the mouth region 16. The lever mechanism 17 locks into place on an associated geometry on the housing of the power tool and additionally allows detachment of the support housing from the housing of the power tool.
The measuring and dust extraction device S is provided with a measuring system 18 which measures the displacement of the adjustable housing part 7 with respect to the fixed support housing 6. This displacing movement corresponds to the drilling depth of the drill 4. The measuring system 18 can be used to implement a magnetoresistive measuring method with a magnetic sensor 20 in a measuring housing 19 and a magnetic strip 21 on the tubular housing section 11 of the adjustable housing part 7. The cuboid-shaped measuring housing 19 is part of the support housing 6 and is situated on the side of the support housing facing the adjustable housing part 7. The measuring housing 19 accommodates signal conditioning electronics and the power supply device in the form of batteries or accumulators.
Additionally, a display unit 22 for reading the current drilling depth is arranged on the measuring housing 19.
Furthermore, operating buttons 23 are provided on the measuring housing 19, via which various parameters can be set, for example the presetting of a reference value for the drilling depth, a reset button for setting a zero value and for presetting a desired value.
The magnetic sensor 20 consists essentially of a resistance measuring bridge, from which the path-dependent counting pulses for the signal conditioning electronics are formed.
The magnetic strip 21 extends in the longitudinal direction of the tubular housing section 11 on the adjustable housing part 7, so that on an adjusting movement of the housing part 7 the relative position of the magnetic strip 21 with respect to the magnetic sensor 20 is changed, from which a counting pulse is generated.

Claims (13)

  1. Claims 1. Measuring and dust extraction device for measuring the machining depth and for dust extraction for a power tool (1), in particular for a power drill or percussion power drill, having a support housing (6) which is to be connected to a housing (2) of the power tool (1), having a dust conducting duct system for dust conduction and having a measuring system (18) for measuring the machining depth, a housing part (7) being held adjustably on the support housing (6) and its adjusting movement correlating with the machining depth.
  2. 2. Measuring and dust extraction device according to Claim 1, characterised in that a duct of the dust conducting duct system is led through the adjustable housing part (7).
  3. 3. Measuring and dust extraction device according to Claim 1 or 2, characterised in that a dust collecting container (14) is arranged on the adjustable housing part (7) and is flow-connected to the air conducting system of the power tool via the duct of the dust conducting duct system.
  4. 4. Measuring and dust extraction device according to one of Claims 1 to 3, characterised in that the adjustable housing part (7) is mounted axially displaceably on the support housing (6).
  5. 5. Measuring and dust extraction device according to one of Claims 1 to 4, characterised in that the adjustable housing part (7) extends up to the machining side of the tool of the power tool (1)
  6. 6. Measuring and dust extraction device according to one of Claims 1 to 5, characterised in that the adjustable housing part (7) is urged in the direction of its greatest distance.
  7. 7. Measuring and dust extraction device according to one of Claims 1 to 6, characterised in that a display unit (22) for displaying the adjusting movement of the adjustable housing part (7) is provided.
  8. 8. Measuring and dust extraction device according to one of Claims 1 to 7, characterised in that the dust conducting duct system has a duct leading through the fixed housing part (7).
  9. 9. Measuring and dust extraction device according to Claim 8, characterised in that the duct in the support part (6) is connectible to an air conducting system in the power tool (1)
  10. 10. Measuring and dust extraction device according to one of Claims 1 to 9, characterised in that the measuring system (18) has a magnetic transducer and an associated sensor (20)
  11. 11. Power tool, in particular power drill, having a measuring and dust extraction device (5) according to one of Claims 1 to 10.
  12. 12. A measuring and dust extraction device substantially as herein described with reference to the accompanying figures.
  13. 13. A power tool substantially as herein described with reference to the accompanying figures.
GB1121903.7A 2010-12-20 2011-12-19 Measuring and dust extraction device for a power tool Withdrawn GB2486805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010063480A DE102010063480A1 (en) 2010-12-20 2010-12-20 Measuring and dust extraction device for a machine tool

Publications (2)

Publication Number Publication Date
GB201121903D0 GB201121903D0 (en) 2012-02-01
GB2486805A true GB2486805A (en) 2012-06-27

Family

ID=45572709

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1121903.7A Withdrawn GB2486805A (en) 2010-12-20 2011-12-19 Measuring and dust extraction device for a power tool

Country Status (3)

Country Link
CN (1) CN102554311A (en)
DE (1) DE102010063480A1 (en)
GB (1) GB2486805A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016172045A1 (en) * 2015-04-20 2016-10-27 Illinois Tool Works Inc. Portable tool
EP3461596A1 (en) * 2017-09-15 2019-04-03 Black & Decker Inc. Dust extractor
US11419466B2 (en) 2020-03-25 2022-08-23 Milwaukee Electric Tool Corporation Dust collector assembly
US11673217B2 (en) 2018-11-19 2023-06-13 Milwaukee Electric Tool Corporation Dust collector including filter cleaning mechanism

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104028527A (en) * 2014-06-20 2014-09-10 吕昕炜 Dust collecting device suitable for electric drill
CN106583793B (en) * 2017-01-30 2018-03-23 陈烁 Depth gauge rule device on electric hand drill
EP3424301A1 (en) * 2017-07-04 2019-01-09 Andreas Stihl AG & Co. KG Method for determining a contamination state of at least one component of a gardening and/or forestry device and gardening and/or forestry system
DE102019216038A1 (en) * 2019-10-17 2021-04-22 Festool Gmbh Assistance device, tool device and method for operating a tool device

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US20020145724A1 (en) * 2001-04-10 2002-10-10 Christoph Wursch Positioning aid for a hand tool device
EP1586414A2 (en) * 2004-04-16 2005-10-19 Jobs S.p.A. A toolhead with sensing means for depth control
GB2426221A (en) * 2005-05-19 2006-11-22 Bosch Gmbh Robert Dust catching device
US20080124181A1 (en) * 2003-02-24 2008-05-29 Airbus Deutschland Gmbh Drilling device with displacement dependent spring and/or damper

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DE7710805U1 (en) * 1977-04-05 1977-07-21 Maschinenfabrik Otto Baier Gmbh, 7140 Ludwigsburg DEVICE FOR SUCTION OF DUST AND THE LIKE. FOR A MACHINE FOR WORKING STONE, WOOD OR DGL.
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CN201559184U (en) * 2009-12-16 2010-08-25 赵晔 Electric hand drill dust collector
CN201669441U (en) * 2010-06-12 2010-12-15 胡海明 Dust-absorption impact electric drill

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Publication number Priority date Publication date Assignee Title
US20020145724A1 (en) * 2001-04-10 2002-10-10 Christoph Wursch Positioning aid for a hand tool device
US20080124181A1 (en) * 2003-02-24 2008-05-29 Airbus Deutschland Gmbh Drilling device with displacement dependent spring and/or damper
EP1586414A2 (en) * 2004-04-16 2005-10-19 Jobs S.p.A. A toolhead with sensing means for depth control
GB2426221A (en) * 2005-05-19 2006-11-22 Bosch Gmbh Robert Dust catching device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016172045A1 (en) * 2015-04-20 2016-10-27 Illinois Tool Works Inc. Portable tool
EP3461596A1 (en) * 2017-09-15 2019-04-03 Black & Decker Inc. Dust extractor
US10857643B2 (en) 2017-09-15 2020-12-08 Black & Decker Inc. Dust extractor
US11673217B2 (en) 2018-11-19 2023-06-13 Milwaukee Electric Tool Corporation Dust collector including filter cleaning mechanism
US11419466B2 (en) 2020-03-25 2022-08-23 Milwaukee Electric Tool Corporation Dust collector assembly

Also Published As

Publication number Publication date
CN102554311A (en) 2012-07-11
DE102010063480A1 (en) 2012-06-21
GB201121903D0 (en) 2012-02-01

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