EP3766639A1 - Machine-outil manuelle - Google Patents

Machine-outil manuelle Download PDF

Info

Publication number
EP3766639A1
EP3766639A1 EP19186946.0A EP19186946A EP3766639A1 EP 3766639 A1 EP3766639 A1 EP 3766639A1 EP 19186946 A EP19186946 A EP 19186946A EP 3766639 A1 EP3766639 A1 EP 3766639A1
Authority
EP
European Patent Office
Prior art keywords
rotation
axis
handle
machine body
tension spring
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Withdrawn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
EP19186946.0A
Other languages
German (de)
English (en)
Inventor
Steffen Geiger
Andres Wellmann Jelic
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP19186946.0A priority Critical patent/EP3766639A1/fr
Priority to JP2022500089A priority patent/JP7322272B2/ja
Priority to CN202080040661.0A priority patent/CN113905850A/zh
Priority to US17/628,040 priority patent/US12048993B2/en
Priority to EP20734967.1A priority patent/EP3999283A1/fr
Priority to PCT/EP2020/068597 priority patent/WO2021008877A1/fr
Publication of EP3766639A1 publication Critical patent/EP3766639A1/fr
Withdrawn legal-status Critical Current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
    • B25D17/24—Damping the reaction force
    • 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
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • 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
    • 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
    • B25F5/006—Vibration damping means
    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B25D2250/371—Use of springs

Definitions

  • the present invention relates to a hand machine tool, in particular a demolition hammer or chipping hammer.
  • a demolition hammer or chisel hammer has a machine body, a striking mechanism and a tool holder in which a tool, such as a chisel, can be accommodated.
  • handles are provided on both sides of the machine body, which are pivot-mounted on the machine body for vibration decoupling and are each equipped with a compression spring to decouple the vibrations applied to the machine body by the tool or the hammer mechanism.
  • a compression spring can, however, tend to buckle under pressure load, as a result of which the compression spring can rest against a spring guide assigned to the compression spring. The resulting friction can worsen the vibration decoupling.
  • the hand-held power tool comprises a handle that can be grasped by a user, a machine body, an axis of rotation, with the aid of which the handle is rotatably mounted on the machine body, and a tension spring, with the aid of which the handle is suspended from the machine body in such a way that the handle is decoupled from vibrations acting on the machine body.
  • a tension spring is used instead of a compression spring, buckling of the spring under load can be reliably prevented.
  • the occurrence of friction between the tension spring and a spring guide is avoided. This always ensures reliable decoupling of the handle from oscillations or vibrations.
  • the handle is "decoupled" from vibrations acting on the machine body is to be understood as meaning that the vibrations are not transmitted from the machine body to the handle or are at least transmitted to a reduced extent.
  • an oscillation amplitude of the vibrations or oscillations can be reduced.
  • the hand-held power tool can include a striking mechanism, which can be arranged inside the machine body, and a tool holder, for example a chuck, for holding a tool.
  • the tension spring is preferably always under tension when the handheld power tool is in operation.
  • the tension spring is preferably a cylinder spring.
  • the tension spring can also be an elastomer body, for example an elastomer band.
  • the hand power tool comprises a first handle, to which a first axis of rotation and a first tension spring are assigned, and a second handle, to which a second axis of rotation and a second tension spring are assigned.
  • the first axis of rotation and the second axis of rotation are preferably arranged at the same height with respect to a vertical direction. With regard to a horizontal direction, the first axis of rotation and the second axis of rotation are preferably spaced apart from one another and positioned next to one another.
  • the first handle has a first handle element that can be grasped by the user
  • the second handle has a second handle element that can also be grasped by the user
  • the second axis of rotation between the first axis of rotation and the first handle element and the first axis of rotation is arranged between the second axis of rotation and the second grip element.
  • the grip elements are preferably formed at least in sections from an elastically deformable material, such as a thermoplastic elastomer, rubber, cork or the like. This increases the ease of use.
  • the first handle has a first base element that is rotatably mounted on the machine body with the aid of the first axis of rotation
  • the second handle has a second base element that is rotatably mounted on the machine body with the aid of the second axis of rotation, wherein the first base element is guided around the second axis of rotation, and wherein the second base element is guided around the first axis of rotation.
  • the first grip element is preferably firmly connected to the first base element and the second grip element is firmly connected to the second base element.
  • the base elements each have an arcuate curved section which is guided around the corresponding axis of rotation. Because the respective base element is guided around the respective axis of rotation of the other handle, the base elements can be made as long as possible with a compact design of the handheld power tool. As a result, the greatest possible spring travel of the respective tension spring can be achieved. This improves the vibration decoupling.
  • the first base element has a first attachment point to which the first tension spring is attached
  • the second base element has a second attachment point to which the second tension spring is attached
  • the first attachment point between the first grip element and the first axis of rotation is arranged
  • the second fastening point is arranged between the second handle element and the second axis of rotation.
  • the tension springs are preferably each suspended in the fastening points. This enables easy assembly of the tension springs.
  • the first fastening point is arranged closer to the second axis of rotation than to the first axis of rotation
  • the second fastening point is arranged closer to the first axis of rotation than to the second axis of rotation.
  • the first fastening point is designed as a hook into which the first tension spring is suspended
  • the second fastening point is designed as a hook into which the second tension spring is suspended.
  • the tension spring is suspended in the machine body.
  • first tension spring is suspended in the machine body
  • second tension spring is also suspended in the machine body
  • the hand power tool comprises a suspension element which is connected to the machine body and in which the tension spring is suspended.
  • a first suspension element, into which the first tension spring is suspended, and a second suspension element, into which the second tension spring is suspended, are preferably provided.
  • the suspension elements can be plate-shaped.
  • the suspension elements are screwed to or suspended from the machine body.
  • the suspension elements each have a hook into which the corresponding tension spring can be simply suspended. This simplifies the assembly of the handheld power tool.
  • first handle and the second handle are arranged on opposite sides of the machine body.
  • the handles can be swiveled clockwise and counterclockwise around the corresponding axis of rotation.
  • the single figure shows a schematic view of an embodiment of a handheld power tool.
  • the figure shows a schematic view of an embodiment of a handheld power tool 1.
  • the handheld power tool 1 is in particular a demolition hammer or chisel hammer.
  • the handheld power tool 1 comprises a machine body 2.
  • the machine body 2 can comprise a housing in which a drive system of the handheld power tool 1 is received.
  • the drive system can for example comprise an electric motor.
  • an impact mechanism 3 is provided on the underside of the machine body 2.
  • a tool holder 4 is provided on the front of the striking mechanism 3.
  • the tool holder 4 is suitable for receiving a tool such as a chisel.
  • the tool holder 4 can be a chuck.
  • the handheld power tool 1 is also assigned a horizontal direction H.
  • the horizontal direction H is oriented perpendicular to the vertical direction V.
  • the vertical direction V can coincide with a direction of gravity.
  • the handheld power tool 1 comprises a first handle 5 and a second handle 6.
  • the handles 5, 6 can each be grasped by one hand of a user.
  • the handles 5, 6 are decoupled from the machine body 2. That is to say, vibrations or oscillations acting on the machine body 2 during operation of the handheld power tool 1 are not transmitted to the handles 5, 6 or only to a limited extent.
  • the handles 5, 6 are arranged on opposite sides of the machine body 2.
  • the first handle 5 comprises a first handle element 7 which can be grasped by the user.
  • the first grip element 7 is arranged completely outside the machine body 2.
  • the first grip element 7 can be made at least in sections from an elastically deformable material, such as a thermoplastic elastomer, rubber, cork or the like.
  • a first base element 8 is also assigned to the first handle 5.
  • the first grip element 7 is firmly connected to the first base element 8.
  • the first base element 8 is rotatably mounted on the machine body 2 with the aid of a first axis of rotation 9.
  • the first axis of rotation 9 can, for example, be a bolt which is fixed relative to the machine body 2 and on which the first base element 8 is rotatably mounted.
  • the first axis of rotation 9 can also be fixed to the first Base element 8 connected bolt, which is rotatably mounted on the machine body 2.
  • the first base element 8 comprises a fastening point 10 which can be designed as a hook. Furthermore, the first base element 8 comprises an arcuate section 11, which is curved in an arc, and a bearing section 12 provided at the end of the arc section 11. The first axis of rotation 9 is received in the bearing section 12.
  • a first tension spring 13 is also assigned to the first handle 5. With the aid of the first tension spring 13, the first handle 5 is suspended from the machine body 2 in such a way that the first handle 5 is decoupled from vibrations acting on the machine body 2. The first tension spring 13 is always under tension. The mobility of the first handle 5 is indicated with the aid of a double arrow 14.
  • the first tension spring 13 is preferably a cylinder spring or a helical tension spring.
  • the first tension spring 13 can, however, also be an elastomer body, for example an elastomer band.
  • the first tension spring 13 is assigned a plate-shaped first suspension element 15, which in turn is firmly connected to the machine body 2.
  • the first suspension element 15 is optional. This means that the first tension spring 13 can also be hung directly into the machine body 2.
  • the second handle 6 is constructed analogously to the first handle 5 and comprises a second handle element 16 which is fastened to a second base element 17.
  • the second base element 17, like the first base element 8, is rotatably mounted on the machine body 2 with the aid of a second axis of rotation 18.
  • the second base element 17 comprises a fastening point 19 which is designed as a hook, an arcuate curved section 20 which is guided around the first axis of rotation 9, and a fastening section 21 which receives the second axis of rotation 18.
  • the second handle 6 is assigned a second tension spring 22, which is hooked into the second base element 17 at the fastening point 19.
  • the second tension spring 22 is preferably a cylinder spring or helical tension spring.
  • the second tension spring 22 can, however, also be an elastomer body, for example an elastomer band.
  • the second tension spring 22 is in turn connected to the base body 2 with the aid of an optional second suspension element 23.
  • the mobility of the second handle 6 is indicated with the aid of a double arrow 24.
  • the arched section 20 of the second base element 17 is guided around the first axis of rotation 9, and the arched section 11 of the first base element 8 is guided around the second axis of rotation 18.
  • the axes of rotation 9, 18 are positioned with respect to the vertical direction V at the same level and with respect to the horizontal direction H next to one another and at a distance from one another.
  • the fastening point 10 is positioned closer to the second axis of rotation 18 than to the first axis of rotation 9.
  • the fastening point 19 is also positioned closer to the first axis of rotation 9 than to the second axis of rotation 18.
  • the attachment point 10 is positioned between the first grip element 7 and the first axis of rotation 9, and the attachment point 19 is positioned between the second grip element 16 and the second axis of rotation 18.
  • the functionality of the handheld power tool 1 is explained below.
  • vibrations are transmitted to the machine body 2 from the tool clamped in the tool holder 4.
  • the handles 5, 6 are decoupled from the machine body 2 with the aid of the tension springs 13, 22 in such a way that the vibrations transmitted to the machine body 2 are not transmitted to the handles 5, 6 or at least to a lesser extent.
  • the handles 5, 6 can pivot clockwise and counterclockwise about the axes of rotation 9, 18, as indicated with the aid of the double arrows 14, 24.
  • the tension springs 13, 22 always remain under tension. This reliably prevents the tension springs 13, 22 from being able to buckle under load in comparison with a handheld power tool with compression springs for vibration damping. If such compression springs buckle, they may come into frictional contact with a spring guide. This is reliably prevented by the use of tension springs 13, 22. This reliably prevents a friction-induced deterioration in the vibration decoupling of the handles 5, 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP19186946.0A 2019-07-18 2019-07-18 Machine-outil manuelle Withdrawn EP3766639A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19186946.0A EP3766639A1 (fr) 2019-07-18 2019-07-18 Machine-outil manuelle
JP2022500089A JP7322272B2 (ja) 2019-07-18 2020-07-02 手持ち式電動工具
CN202080040661.0A CN113905850A (zh) 2019-07-18 2020-07-02 手持式电动工具
US17/628,040 US12048993B2 (en) 2019-07-18 2020-07-02 Hand-held power tool
EP20734967.1A EP3999283A1 (fr) 2019-07-18 2020-07-02 Machine-outil portative
PCT/EP2020/068597 WO2021008877A1 (fr) 2019-07-18 2020-07-02 Machine-outil portative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19186946.0A EP3766639A1 (fr) 2019-07-18 2019-07-18 Machine-outil manuelle

Publications (1)

Publication Number Publication Date
EP3766639A1 true EP3766639A1 (fr) 2021-01-20

Family

ID=67437956

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19186946.0A Withdrawn EP3766639A1 (fr) 2019-07-18 2019-07-18 Machine-outil manuelle
EP20734967.1A Pending EP3999283A1 (fr) 2019-07-18 2020-07-02 Machine-outil portative

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20734967.1A Pending EP3999283A1 (fr) 2019-07-18 2020-07-02 Machine-outil portative

Country Status (4)

Country Link
EP (2) EP3766639A1 (fr)
JP (1) JP7322272B2 (fr)
CN (1) CN113905850A (fr)
WO (1) WO2021008877A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4321302A1 (fr) * 2022-08-08 2024-02-14 Hilti Aktiengesellschaft Dispositif d'amortissement des chocs pour un accumulateur
EP4321303A1 (fr) * 2022-08-08 2024-02-14 Hilti Aktiengesellschaft Machine-outil dotée d'un élément de protection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH195398A (de) * 1936-12-14 1938-01-31 Robert Wacker Fa Handgriffanordnung an Geräten mit schwingenden und schlagenden Kräften.
US4576241A (en) * 1983-02-03 1986-03-18 Henri Emonet Tool assembly and handle assembly therefor
CN201711953U (zh) * 2010-07-19 2011-01-19 白冰 一种冲击式破碎镐摆动减振手把

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420058B (sv) * 1980-01-24 1981-09-14 Atlas Copco Ab Svengningsdempande anordning vid handhallna slaende maskiner
GB2402098B (en) * 2003-05-21 2007-10-17 Black & Decker Inc Vibration reduction apparatus for power tool and power tool incorporating such apparatus
EP1882560B1 (fr) * 2003-09-10 2011-06-08 Makita Corporation Manche sans vibration
GB2407789A (en) 2003-11-04 2005-05-11 Black & Decker Inc Vibration reduction apparatus for a power tool
DE102005000207A1 (de) * 2005-12-23 2007-06-28 Hilti Ag Handwerkzeuggerät mit gefederter Griffaufhängung
DE102006052807A1 (de) * 2006-11-09 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine mit einem vibrationsgedämpften Bügelhandgriff
DE102007000408A1 (de) * 2007-07-27 2009-01-29 Hilti Aktiengesellschaft Handwerkzeuggerät
DE102008010100A1 (de) * 2008-02-20 2009-08-27 Robert Bosch Gmbh Handwerkzeugmaschine
CN203125480U (zh) * 2013-02-07 2013-08-14 永康市嘉宏工具制造有限公司 减震装置
CN204976564U (zh) * 2015-09-28 2016-01-20 东莞贝兰克机电有限公司 一种手持式电动工具的手柄

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH195398A (de) * 1936-12-14 1938-01-31 Robert Wacker Fa Handgriffanordnung an Geräten mit schwingenden und schlagenden Kräften.
US4576241A (en) * 1983-02-03 1986-03-18 Henri Emonet Tool assembly and handle assembly therefor
CN201711953U (zh) * 2010-07-19 2011-01-19 白冰 一种冲击式破碎镐摆动减振手把

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4321302A1 (fr) * 2022-08-08 2024-02-14 Hilti Aktiengesellschaft Dispositif d'amortissement des chocs pour un accumulateur
EP4321303A1 (fr) * 2022-08-08 2024-02-14 Hilti Aktiengesellschaft Machine-outil dotée d'un élément de protection
WO2024033076A1 (fr) * 2022-08-08 2024-02-15 Hilti Aktiengesellschaft Unité d'absorption de chocs pour une batterie de stockage
WO2024033075A1 (fr) * 2022-08-08 2024-02-15 Hilti Aktiengesellschaft Machine-outil dotée d'un élément de protection

Also Published As

Publication number Publication date
JP7322272B2 (ja) 2023-08-07
EP3999283A1 (fr) 2022-05-25
JP2022538912A (ja) 2022-09-06
CN113905850A (zh) 2022-01-07
WO2021008877A1 (fr) 2021-01-21
US20220314412A1 (en) 2022-10-06

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