EP2729280A1 - Dispositif à percussion - Google Patents

Dispositif à percussion

Info

Publication number
EP2729280A1
EP2729280A1 EP12728223.4A EP12728223A EP2729280A1 EP 2729280 A1 EP2729280 A1 EP 2729280A1 EP 12728223 A EP12728223 A EP 12728223A EP 2729280 A1 EP2729280 A1 EP 2729280A1
Authority
EP
European Patent Office
Prior art keywords
racket
impact
guide
firing pin
control disk
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
EP12728223.4A
Other languages
German (de)
English (en)
Other versions
EP2729280B1 (fr
Inventor
Lars Schmid
Johannes Schnitzler
Jan Koalick
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 EP2729280A1 publication Critical patent/EP2729280A1/fr
Application granted granted Critical
Publication of EP2729280B1 publication Critical patent/EP2729280B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • 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
    • B25D17/24—Damping the reaction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0015—Anvils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0019—Guide-sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons

Definitions

  • the invention is based on a hammer mechanism, in particular for a hammer mechanism
  • Drill and / or chipping hammer with at least one racket, with at least one firing pin, which has at least one guide nose facing the racket, and with at least one movably mounted control disk, which is arranged around the guide lug.
  • percussion device is to be understood here in particular as a device which has at least one component which can be used to generate and / or transmit a pulse, in particular an axial impact impulse, to one in one
  • Tool holder arranged processing tool is provided.
  • a component can be, in particular, a racket, a firing pin, a guide element, in particular a hammer tube and / or a piston, in particular a pot piston, and / or further components which appear useful to the person skilled in the art.
  • the term "intended” should be understood in particular to be specially designed and / or specially equipped.
  • a component is to be defined which is moved to transmit a shock pulse to a further component of the percussion device, in particular to the firing pin, within a guide element, in particular within a hammer tube and / or a pot piston.
  • the beater is preferably moved within the guide element to generate a beating impulse by means of a pressure, in particular by means of an air pressure generated by a piston guided in the hammer tube.
  • the racket is arranged along a direction of impact between a piston and the firing pin and / or a tool.
  • firing pin is intended here to define in particular a component which is intended to be one of the
  • control disk is to be understood here as meaning, in particular, a component which is intended to move a control sleeve for controlling a pressure in the guide element as a result of a movement of the firing pin.
  • the firing pin preferably has control extensions for movement of the control disk, which are intended to move the control disk in a direction directed against a direction of impact of the racket.
  • the term "guide nose” should in particular define a region of the firing pin on which the control disk is at least partially guided
  • the control disk preferably comprises a recess in which the guide nose of the firing pin is arranged, in particular engages.
  • the guide lug particularly preferably has a round cross section in a plane extending at least substantially perpendicularly to a direction of impact of the racket
  • the guide lug it is also conceivable for the guide lug to have another configuration that appears appropriate to a person skilled in the art and / or another,
  • the term “substantially perpendicular” should in particular define an orientation of a direction relative to a reference direction, the term “substantially perpendicular” as used herein Direction and the reference direction, especially in one plane, a Include angle of 90 ° and the angle has a maximum deviation of in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
  • the term "projecting in any operating state” is to be understood here in particular as an arrangement of the guide lug in any operating conditions that the guide lug can assume in an assembled state during operation, the guide lug extending at one end along a direction of impact of the racket Direction, extends at any time and / or in any position in an assembled state over at least one of the racket facing outer surface of the control disk out
  • Control disk are transmitted, which could damage the control disk.
  • advantageous damage to the control disk can be prevented. It can advantageously be achieved a long life of the components of the impact mechanism according to the invention.
  • the guide lug projects beyond the control disk in any operating state along a direction directed against a direction of impact of the racket with the end facing the racket, at least by more than 0.1 mm.
  • the guide nose preferably projects with the end at least more than 0.5 mm beyond the control disk and particularly preferably at least more than 1 mm. It can be advantageously prevented that the guide nose is moved out of the recess of the control disk during a striking movement in the direction of a machining tool arranged in a tool holder.
  • the guide nose along an impact direction of the racket on an axial extent, which is at least greater than 25% of a total extension of the firing pin.
  • the guide nose along an impact direction of the racket on an axial extent which is at least greater than 30% of a total extension of the firing pin and more preferably at least greater than 33% of a total extension of the firing pin.
  • the guide lug has an axial extension, which is preferably longer than an idle travel of the firing pin in the guide element.
  • the total extension of the firing pin extends in an assembled state of the firing pin at least substantially parallel to the direction of impact of the racket.
  • the direction relative to the reference direction has a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
  • the racket at one of the guide nose facing the end of the racket has at least one immersion recess, which is intended to allow immersion of the guide nose upon approach of the racket to the firing pin.
  • the immersion recess preferably has a cross section which corresponds to a cross section of the guide nose in a plane extending at least substantially perpendicularly to a direction of impact of the racket.
  • the immersion recess can in this case be formed by a through hole, which is closed for example on a side facing away from the firing pin of the racket by means of a membrane, which ensures that the racket by means of a pressure, in particular by means of an air pressure, can be moved within the guide member.
  • the immersion recess has another, a skilled person appear appropriate design. It can be achieved structurally simple implementation of the firing pin and the racket in already existing percussion device.
  • the immersion recess is formed by a blind hole.
  • the dip recess has a depth which is at least greater than 10% of a total extension of the racket along a direction directed against a direction of impact of the racket.
  • the immersion recess has a depth which is at least greater than 15% of a total extension of the racket along a direction directed against a direction of impact of the racket, and more preferably at least greater than 20% of a total extension of the racket.
  • the total extension of the racket in an assembled state is preferably at least substantially parallel to a direction of impact of the racket.
  • a "depth" is to be understood here in particular as meaning a maximum distance along a striking direction of the racket between an outer surface of the racket facing the firing pin and a limiting wall of the racket delimiting the immersion recess and extending at least substantially perpendicular to a direction of impact of the racket
  • the invention is based on a portable power tool, in particular a drill and / or chisel hammer, with a
  • a "portable machine tool” is to be understood here in particular as meaning a machine tool for machining workpieces, which can be transported by an operator in a transport-like manner
  • the portable machine tool has, in particular, a mass which is smaller than 40 kg, preferably smaller than 10 kg, and more preferably less than 5 kg, it can be advantageously achieved a high working comfort for an operator of the portable power tool.
  • the impact mechanism according to the invention and / or the portable power tool according to the invention should not be limited to the application and embodiment described above.
  • the striking mechanism device according to the invention and / or the portable power tool according to the invention can have a number deviating from a number of individual elements, components and units specified here in order to fulfill a mode of operation described herein.
  • FIG. 1 shows a portable power tool according to the invention with a striking mechanism according to the invention in a schematic representation
  • Fig. 3 is a detailed view of a racket of Schlagtechnikvortechnik invention in a schematic representation
  • Fig. 4 is a detail view of a firing pin of the invention
  • FIG. 1 shows a portable machine tool 26 with a percussion device 10.
  • the portable machine tool 26 is designed as a drill and / or chisel hammer. However, it is also conceivable that the portable power tool 26 has another, to a skilled worker appear appropriate design, such as impact wrench, hammer, etc.
  • the portable power tool 26 includes a machine tool housing 28, a drive unit 30 and a transmission unit 32 of the portable Machine tool 26 encloses.
  • the drive unit 30 is intended to generate a drive torque in a manner already known to a person skilled in the art.
  • the drive torque of the drive unit 30 is transmitted via the gear unit 32 for generating a shock pulse to the percussion device 10 and for generating a rotational movement of a in a factory tool holder 34 of the portable power tool 26 arranged processing tool 36 via a guide member 46 ( Figure 2) to the tool holder 34 transmitted.
  • the impact pulse of the percussion device 10 is in this case produced in a manner known to those skilled in the art.
  • FIG. 2 shows the percussion mechanism 10 partially in a rear end position of a firing pin 14 of the impact mechanism 10 and partly in a front end position of the firing pin 14.
  • the firing pin 14 is supported via a damping element 40 of the impact mechanism 10 on a movably mounted control disc 18 of FIG percussion device
  • the damping element 40 is intended to dampen firing pin rebound impacts.
  • the recesses 42, 56 of the guide member 46 are to allow axial movement of the
  • Control disk 18 along and against a direction of impact 22 of a racket 12 of the percussion device 10 is provided in the guide member 46.
  • the guide member 46 is formed as a hammer tube 48, which leads the firing pin 14 and the racket 12 axially in a generation and / or transmission of a shock pulse. In the front end position is the firing pin
  • the percussion device 10 thus comprises the racket 12, the firing pin 14, which has a guide lug 16 facing the racket 12, and the movably mounted control disk 18, which is arranged around the guide lug 16.
  • the control disk 18 in this case comprises a recess 50 in which the guide nose 16 of the firing pin 14 is arranged in an assembled state.
  • the recess 50 is circular, wherein a central axis of the control disk 18 forms a center of the recess 50. The central axis extends at least substantially parallel to the impact direction 22 of the racket 12.
  • the control disk 18 in this case has an annular configuration which comprises two at least substantially radially extending guide extensions 52, 54.
  • the guide extensions 52, 54 are provided to guide the control disk 18 in the recesses 42, 56.
  • the tax disc 18 has another, a skilled person appear appropriate design, such as a polygonal configuration, for example, corners to a guide in the recesses 42, 56 are arranged.
  • the guide lug 16 projects in this case in each operating state along the direction opposite to the direction of impact 22 of the racket 12 direction with the end 20, which faces the racket 12 by more than 0.1 mm beyond the control disk 18 addition.
  • the guide nose 16 points along the direction of impact
  • the guide nose 16 has a cylindrical configuration.
  • the guide lug 16 in an at least substantially perpendicular to the direction of impact 22 of the racket 12 extending
  • the racket 12 at an end of the racket 12 facing the guide lug 16 has an immersion recess 24, which is intended to allow the guide lug 16 to be immersed when the racket 12 approaches the firing pin 14.
  • the immersion recess 24 is formed by a blind hole (see also Figure 3).
  • the immersion recess 24 has a depth x that is at least greater than 10% of a total extension of the racket 12 along the direction directed against the direction of impact 22 of the racket 12 along the direction directed against the direction of impact 22 of the racket 12 (FIG. 3).
  • the immersion recess 24 has in the at least substantially perpendicular to the direction of impact 22 of the racket 12 extending plane corresponding to the circular cross-section of the guide lug 16 cross-section.
  • the immersion recess 24 another, a specialist than has reasonably appearing cross-section.
  • the immersion recess 24 along a direction at least substantially perpendicular to the direction of impact 22 of the racket 12 direction has a larger dimension than the guide lug 16.
  • a clearance fit of the guide lug 16 in the immersion recess 24 allows.
  • the racket 12 When a shock pulse is generated, the racket 12 is moved in the direction of the firing pin 14 in the hammer tube 48 by means of a compressed air cushion in the hammer tube 48 by a piston 60 of the percussion device 10.
  • air control openings 62, 64, 66 of the hammer tube 48 are closed by a control sleeve 68 of the percussion device 10 to build up a pressure (see the upper part of Figure 2).
  • the control sleeve 68 surrounds the hammer tube 48 along a extending in the at least substantially perpendicular to the direction of impact 22 of the racket 12 extending plane 70.
  • control sleeve 68 is acted upon by a spring element 72 of the percussion device 10 in the direction of the tool holder 34 with a spring force.
  • the firing pin 14 is located after a pressing of the tool holder 34 arranged in the machining tool 36 to a workpiece (not shown here) in the rear end position.
  • the control sleeve 68 is moved over the firing pin 14, the damping element 40 and the control disk 18 counter to a spring force of the spring element 72 via the air control openings 62, 64 in a manner already known to a person skilled in the art.
  • 66 to close the air control openings 62, 64, 66.
  • a pressure for movement of the racket 12 in the hammer tube 48 can be generated.
  • the beater 12 is moved in the direction of the firing pin 14 by means of the air cushion compressed by the piston 60 until a base region 74 of the beater 12 delimiting the immersion recess 24 comes into direct contact with the guide nose 16. This will be a
  • the end 20 of the guide lug 16 always projects beyond the control disk 18.
  • the control sleeve 68 is by means of a spring force of the spring element 72nd also moved in the direction of the tool holder 34.
  • the air control openings 62, 64, 66 are opened and a sequence for generating a shock pulse by means of the percussion device 10 can begin again, as described above and in a manner already known to a person skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un dispositif à percussion, en particulier pour marteau perforateur et/ou marteau-burineur, qui comprend au moins un marteau (12), au moins un percuteur (14) qui présente au moins un ergot de guidage (16) tourné vers le marteau (12), ainsi qu'au moins un plateau de commande(18) monté mobile qui est disposé autour de l'ergot de guidage (16). Selon l'invention, il est prévu qu'une extrémité (20) de l'ergot de guidage (16) fasse saillie du plateau de commande (18) dans chaque état de fonctionnement.
EP12728223.4A 2011-07-05 2012-06-13 Dispositif à percussion Active EP2729280B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011078628A DE102011078628A1 (de) 2011-07-05 2011-07-05 chlagwerkvorrichtung
PCT/EP2012/061170 WO2013004459A1 (fr) 2011-07-05 2012-06-13 Dispositif à percussion

Publications (2)

Publication Number Publication Date
EP2729280A1 true EP2729280A1 (fr) 2014-05-14
EP2729280B1 EP2729280B1 (fr) 2017-03-29

Family

ID=46319725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12728223.4A Active EP2729280B1 (fr) 2011-07-05 2012-06-13 Dispositif à percussion

Country Status (5)

Country Link
US (1) US20140144658A1 (fr)
EP (1) EP2729280B1 (fr)
CN (1) CN103648725B (fr)
DE (1) DE102011078628A1 (fr)
WO (1) WO2013004459A1 (fr)

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JP1505300S (fr) * 2013-07-05 2015-11-09
JP1519186S (fr) * 2013-11-18 2015-03-16
KR101412092B1 (ko) * 2013-11-28 2014-07-02 주식회사 엔와이테크 저소음형 유압 타격 장치
CA2943806C (fr) 2014-03-27 2022-05-31 Techtronic Power Tools Technology Limited Dispositif d'entrainement d'attache motorise et son procede de fonctionnement
USD830808S1 (en) * 2016-11-14 2018-10-16 Hilti Aktiengesellschaft Breaker
USD843189S1 (en) * 2016-12-20 2019-03-19 Hilti Aktiengesellschaft Breaker
USD843190S1 (en) * 2016-12-20 2019-03-19 Hilti Aktiengesellschaft Combi hammer
USD853815S1 (en) * 2017-11-06 2019-07-16 Ingersoll-Rand Company D-handle impact tool
CN215789518U (zh) * 2018-12-10 2022-02-11 米沃奇电动工具公司 冲击工具
JP7320419B2 (ja) 2019-09-27 2023-08-03 株式会社マキタ 回転打撃工具
JP7386027B2 (ja) * 2019-09-27 2023-11-24 株式会社マキタ 回転打撃工具
USD948978S1 (en) * 2020-03-17 2022-04-19 Milwaukee Electric Tool Corporation Rotary impact wrench
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Also Published As

Publication number Publication date
CN103648725B (zh) 2016-05-11
US20140144658A1 (en) 2014-05-29
EP2729280B1 (fr) 2017-03-29
WO2013004459A1 (fr) 2013-01-10
CN103648725A (zh) 2014-03-19
DE102011078628A1 (de) 2013-01-10

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