EP1221359A1 - Dispositif d'isolation de vibrations - Google Patents

Dispositif d'isolation de vibrations Download PDF

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Publication number
EP1221359A1
EP1221359A1 EP01130569A EP01130569A EP1221359A1 EP 1221359 A1 EP1221359 A1 EP 1221359A1 EP 01130569 A EP01130569 A EP 01130569A EP 01130569 A EP01130569 A EP 01130569A EP 1221359 A1 EP1221359 A1 EP 1221359A1
Authority
EP
European Patent Office
Prior art keywords
actuator
vibration
handle
vibration isolation
unit
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.)
Granted
Application number
EP01130569A
Other languages
German (de)
English (en)
Other versions
EP1221359B1 (fr
Inventor
Karl Dr. Bendel
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 EP1221359A1 publication Critical patent/EP1221359A1/fr
Application granted granted Critical
Publication of EP1221359B1 publication Critical patent/EP1221359B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/141—Magnetic parts used in percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221—Sensors

Definitions

  • the invention relates to a device with a Vibration isolation device according to the preamble of the claim 1.
  • the hand machine tool has a housing on which a tool opposite side a handle is arranged.
  • the handle is connected to the swivel at one end Housing coupled. Furthermore, the handle on one Swivel opposite end via an isolating device connected to the housing.
  • the isolating device has a helical compression spring that on the handle over a first spring support and on the housing supported by a second spring support.
  • the first spring rest is on the handle and the second spring support is on the housing attached.
  • On that End facing away from the handle has a thread, on the side facing away from the handle second spring support a nut is screwed on.
  • the nut is the guide rod against the direction of action of the Helical compression spring on the second spring support firmly with the second spring support connected.
  • US 5,697,456 A is a hand tool known with a handle that over at a first end a swivel and at a second end via an isolating device connected to a housing of the hand machine tool is.
  • the isolation device has a helical compression spring with a relatively low tension. exceeds a force applied to the handle has a predetermined value a normal application of the hand machine tool, the Handle with one connected in series to the helical compression spring Stop element in operative connection.
  • the stop element is formed by a sleeve made of an elastic plastic.
  • the helical compression spring can run on the block through the stop element avoided and it can signal an operator become a boundary of a predetermined range is achieved for which the handheld power tool is designed and within which an optimal work result can be achieved.
  • the invention is based on a device, in particular from a handheld machine tool, with at least one in operation vibrated by the first unit and with at least one second unit, which has a vibration isolation device in operative connection with the first unit stands, and with one in operation the vibration isolation device burdensome operating force.
  • the vibration isolator has an actuator, via which the operating force with a Positioning force can be at least partially compensated, the Positioning force at least largely independent of the present, vibration to be isolated.
  • the operator can compensated by the actuator and it can be used with a soft, short, light and space-saving spring element of the vibration isolation device always an advantageous working position of the Spring element, an advantageous travel and an advantageous Isolation can be achieved.
  • It can be a spring mass system or a vibrating system can be achieved, the one very low rigidity at high frequencies within one narrow hubs and one for low frequencies has high rigidity, which means, for example, in handheld power tools achieved an advantageous leadership position can be.
  • a maximum compensation frequency of the actuator is less than an excitation frequency of the device and in particular is less than a natural frequency of the spring element.
  • Particularly advantageous results can be achieved when the spring element in connection with the mass of the second unit and possibly one with the second Unity related body, for example with a hand of an operator that has a natural frequency that is less than half the average excitation frequency and the maximum compensation frequency from the actuator is less than half the natural frequency of the spring element in connection with the mass of the second unit.
  • the actuator can be designed in various ways, for example can this be electrical, electromagnetic, hydraulic etc. be executed.
  • the actuator should be one as a result vibration isolation caused movement of the second Allow unit relative to the first unit and also at movement of the second unit due to vibration should or should have as constant a positioning force as possible the actuator has a force deflection characteristic that is around a rest position of the spring mass system is constant. This can structurally simple with one of a proportional magnet formed actuator can be achieved.
  • the operating force can either be a parameter for the Operating force directly and / or it can be via a sensor unit a parameter for one resulting from the operating power Travel detected and depending on this parameter, the operating force be compensated.
  • the actuating force depends on other operating variables, for example depending on a recognized operating mode a hand machine tool, in different sizes is set.
  • a parameter for the operating force with a sensor unit can be detected with inexpensive sensors with a Control unit a simple control and alternatively with a control unit can be set up a control.
  • the sensors should be able to record constant operating power.
  • the solution according to the invention can be obtained from various experts devices that appear to be useful are used, such as in the storage of components such as Motor vehicle axles, internal combustion engines, etc.
  • the operating force can be a bearing force, a reaction force etc. be formed by a vibration isolation device pressure and / or tensile force.
  • the solution according to the invention can particularly advantageous in hand-held machine tools, in particular can be used with rotary and / or chisel hammers. Is the Actuator arranged in the handle of the hand machine tool, can increased the total mass of the handle with the actuator and the insulation can be improved.
  • Fig. 1 shows a hammer drill and chisel with one in one Housing 34 electric motor, not shown, and a Gearbox and striking mechanism, over which one in a tool holder 36 clamped drill 38 rotating and striking is drivable.
  • a first, vertical Handle 42 extending to the actuating direction 40 on the housing 34 attached.
  • a second handle 10 arranged on one of one Tool end facing away from the first end via an articulated Pivot connection 44 is connected to the housing 34.
  • a handle be made parallel to the machining direction, namely via rails or a multi-point suspension Leaf springs, etc.
  • a hand machine tool could an axially movable housing that vibration-isolated in accordance with the solution according to the invention is.
  • the handle 10 is via a vibration isolation device 14 connected to the housing 34.
  • the vibration isolation device 14 has one of one Proportional magnets formed, attached in the handle 10 Actuator 22, which is connected to the housing 34 via a plunger 46 Active connection is established.
  • a plunger 46 On the plunger 46 is a prestressed Helical compression spring 20, which extends to a first end on the housing 34 and with a second end on the handle 10 supports and is used for vibration isolation.
  • the actuator 22 can be operated with an actuating force 24 of the plunger 46 against the housing 34 an operating force acting on the handle 10 12 can be compensated by the actuating force 24 generates a reaction force on the handle 10, which is opposite to the actuating force 12.
  • the actuator 22 can always be an advantageous working position of the prestressed Coil compression spring 20 and an optimal distance of the handle 10 to the housing 34 can be reached, the Actuating force 24 regardless of a present, to be isolated Vibration of the housing 34 or the hammer drill and chisel is.
  • the handle can be used for vibration isolation 10 are moved against the helical compression spring 20, the plunger 46 is also moved, but the actuating force 24 of the actuator 22 remains unchanged.
  • Eddy current sensors can be a parameter for one spring travel resulting from the acting actuating force 12 the handle 10 can be detected.
  • eddy current sensors are also others that appear sensible to a person skilled in the art Distance sensors and distance sensors conceivable, such as Strain gauge, over which a bend a Connecting part or a spring element can be detected.
  • the recorded parameters are sent to a data line Control unit 32 forwarded depending on the detected Characteristics with the actuator 22, the actuating force 12 on the Actuating force 24 compensates or compensates.
  • An excitation frequency of the hammer drill and chisel hammer to be isolated is between 40 Hz and 20 Hz, at a maximum Impact frequency 40 Hz and at a half reduced Impact frequency 20 Hz.
  • the helical compression spring 20 was tuned to approx. 10 Hz, which means that at a reduced Beat frequency still achieved advantageous insulation can be, and the control unit 32 only compensates Frequencies up to approx. 5 Hz or have a maximum compensation frequency of 5 Hz.
  • the vibration isolating device 16 in FIGS. 3 and 4 has a sensor unit 26 with a plate 58 on which a Helical compression spring 20 and a plunger 46 of an actuator 22 are supported and its electrical resistance is dependent changed by a pressure force acting on it.
  • the sensor unit 26 can be parameters for the present actuation forces 12 can be detected, even for static or constant actuating forces 12.
  • the recorded parameters are on a data line through a guide pin 52 is guided to a control unit 54 via which an actuating force 24 of the actuator 22 to the present actuating force 12 set and the present operating force 12 can be compensated.
  • the vibration isolating device 18 in FIG. 5 has one Sensor unit 28 with a plate 50 on which a helical compression spring 20 is supported.
  • a plunger 46 of an actuator 22 acts directly on a housing 34 of a hammer drill and chisel.
  • a pressure force acting on the plate 50 changes its electrical resistance, whereby with the sensor unit 28 parameters for existing actuation forces 12 can be detected, even for static or constant actuating forces 12.
  • the parameters are above a data line to a control unit 56 via which an actuating force 24 of the actuator 22 to an existing actuating force 12 adjusted and the present operating force 12 can be compensated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP20010130569 2001-01-05 2001-12-21 Dispositif d'isolation de vibrations Expired - Lifetime EP1221359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001100378 DE10100378A1 (de) 2001-01-05 2001-01-05 Vorrichtung mit einer Schwingungsisoliereinrichtung
DE10100378 2001-01-05

Publications (2)

Publication Number Publication Date
EP1221359A1 true EP1221359A1 (fr) 2002-07-10
EP1221359B1 EP1221359B1 (fr) 2010-11-10

Family

ID=7669867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010130569 Expired - Lifetime EP1221359B1 (fr) 2001-01-05 2001-12-21 Dispositif d'isolation de vibrations

Country Status (2)

Country Link
EP (1) EP1221359B1 (fr)
DE (2) DE10100378A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1270151A1 (fr) * 2001-06-21 2003-01-02 HILTI Aktiengesellschaft Outil electrique à percussion avec système actif antivibratoire
GB2382856A (en) * 2001-11-28 2003-06-11 Bosch Gmbh Robert A device for damping the vibrations of a handgrip of a power-driven tool
GB2413299A (en) * 2004-04-23 2005-10-26 Bosch Gmbh Robert Hand tool with vibration damped handle
US7320369B2 (en) * 2003-11-04 2008-01-22 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7472760B2 (en) 2003-11-04 2009-01-06 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7762348B2 (en) 2003-11-04 2010-07-27 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
WO2011072908A1 (fr) * 2009-12-15 2011-06-23 Robert Bosch Gmbh Outil électrique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7527107B2 (en) * 2003-07-15 2009-05-05 Wacker Construction Equipment Ag Working tool with damped handle
DE10332109B4 (de) * 2003-07-15 2009-01-15 Wacker Construction Equipment Ag Arbeitsgerät mit Handgriffabfederung
DE102005031074A1 (de) * 2005-06-24 2007-01-04 C. & E. Fein Gmbh Kraftgetriebenes Handwerkzeug mit Dämpfungseinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6076616A (en) * 1996-11-12 2000-06-20 Wacker-Werke Gmbh & Co. Kg Working tool which can be guided in a grab handle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6076616A (en) * 1996-11-12 2000-06-20 Wacker-Werke Gmbh & Co. Kg Working tool which can be guided in a grab handle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1270151A1 (fr) * 2001-06-21 2003-01-02 HILTI Aktiengesellschaft Outil electrique à percussion avec système actif antivibratoire
GB2382856A (en) * 2001-11-28 2003-06-11 Bosch Gmbh Robert A device for damping the vibrations of a handgrip of a power-driven tool
GB2382856B (en) * 2001-11-28 2004-01-21 Bosch Gmbh Robert Device for vibration-damping of a handgrip of a power-driven tool
US7320369B2 (en) * 2003-11-04 2008-01-22 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7472760B2 (en) 2003-11-04 2009-01-06 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7762348B2 (en) 2003-11-04 2010-07-27 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
GB2413299A (en) * 2004-04-23 2005-10-26 Bosch Gmbh Robert Hand tool with vibration damped handle
GB2413299B (en) * 2004-04-23 2006-08-02 Bosch Gmbh Robert Hand tool machine, in particular a drilling and/or percussion hammer
US7287601B2 (en) 2004-04-23 2007-10-30 Robert Bosch Gmbh Power tool with a rotating and/or hammering drive mechanism
WO2011072908A1 (fr) * 2009-12-15 2011-06-23 Robert Bosch Gmbh Outil électrique

Also Published As

Publication number Publication date
EP1221359B1 (fr) 2010-11-10
DE10100378A1 (de) 2002-07-25
DE50115703D1 (de) 2010-12-23

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