EP4185438A1 - Dispositif d'amortissement des chocs pour accumulateur - Google Patents

Dispositif d'amortissement des chocs pour accumulateur

Info

Publication number
EP4185438A1
EP4185438A1 EP21740551.3A EP21740551A EP4185438A1 EP 4185438 A1 EP4185438 A1 EP 4185438A1 EP 21740551 A EP21740551 A EP 21740551A EP 4185438 A1 EP4185438 A1 EP 4185438A1
Authority
EP
European Patent Office
Prior art keywords
machine tool
damping element
accumulator
housing
damping
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.)
Pending
Application number
EP21740551.3A
Other languages
German (de)
English (en)
Inventor
Thomas Bader
Matthias Doberenz
Torsten Tussing
Sören Schöpke
Michael Brandner
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
Publication of EP4185438A1 publication Critical patent/EP4185438A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • 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
    • B25D2250/121—Housing details
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a machine tool, in particular a chipping hammer, with a housing and a rechargeable battery interface device for releasably connecting at least one rechargeable battery to the machine tool.
  • Battery-powered rotary and/or chisel hammers of the type mentioned at the outset are known in principle from the prior art.
  • accumulators are used to supply the machine tool with electrical energy, it is advantageous that special measures are taken to protect the accumulators against shocks, impacts and other mechanical effects. Accumulators can be very sensitive or prone to failure to such mechanical influences, such as blows, impacts, etc., react.
  • a machine tool in particular a chipping hammer, with a housing and a rechargeable battery interface device for releasably connecting at least one rechargeable battery to the machine tool.
  • a damping device for absorbing and damping impacts acting on the at least one rechargeable battery is contained between the housing and the rechargeable battery interface device.
  • the damping device can also be referred to as a shock absorbing device.
  • the damping device can also be used to reduce vibrations acting on the accumulator.
  • the damping device may contain at least one damping element, which is arranged in a longitudinal extension perpendicular to a working axis of the machine tool.
  • the damping element it can be possible for the damping element to be configured cylindrically and to have an essentially oval cross-sectional area. According to a further advantageous embodiment of the present invention, it may be possible for the at least one damping element to contain at least one axially running groove on an outer lateral surface. As a result, the elasticity and consequently the damping effect of the damping element can be increased.
  • the at least one damping element may at least partially contain an elastic material.
  • the elastic material can be an elastomer or rubber.
  • the at least one damping element may be designed in the form of a spring element, in particular a spiral spring element.
  • FIG. 1 shows a side view of a machine tool designed as a chipping hammer
  • FIG. 2 shows a side view of the upper end of a housing of the machine tool with a protective bracket
  • FIG. 3 shows a side view of the upper end of the housing of the machine tool with the protective bar
  • FIG. 4 shows a perspective view of the upper end of the housing of the machine tool with a shock absorbing device and without the protective bar;
  • FIG. 5 shows a sectional view through the shock absorbing device
  • FIG. 6 shows a further sectional view through the shock absorbing device and a first and second accumulator
  • FIG. 7 shows a perspective view of a damping element.
  • FIG. 1 shows a machine tool 1 in the form of a chipping hammer.
  • the machine tool 1 it is also possible for the machine tool 1 to be designed in the form of a saw, a grinder, a screwdriver, a drill, a hammer drill or the like.
  • the machine tool 1 designed as a chipping hammer essentially contains a housing 2, a first handle 3a, a second handle 3b, a battery holder 4 and a tool holder 5.
  • the interior of the housing 2 essentially contains an electric motor and an impact device.
  • the percussion device can also be referred to as percussion mechanism or percussion mechanism device.
  • the electric motor and the impact device are connected to one another in such a way that pulse-like impacts are generated and transmitted to the tool holder 5 . Neither the electric motor nor the impact device are shown in the figures.
  • a first and second accumulator 6a, 6b are connected to the machine tool 1 via the accumulator receiving device 7 .
  • the housing 2 in turn includes a first end 2a, a second end 2b, a left side wall 2c and a right side wall 2d.
  • the first handle 3a is positioned on the left side wall 2c and the second handle 3b is positioned on the right side wall 2d.
  • the tool holder 5 is positioned at the first end 2a of the housing 2 and serves to receive and hold a tool 8 .
  • the tool 8 is in the form of a chisel.
  • the accumulator receiving device 5 is positioned at the second end 2b of the housing 2 and is used for receiving and folding the first and second accumulator 6a, 6b.
  • the battery holder 4 in turn contains a battery interface device 9 and a battery fall protection device 10.
  • the battery interface device 9 essentially contains a flat base plate 11, a first connection device 12a for receiving the first battery 6a and a second connection device 12b for receiving the second battery 6b.
  • the first and second connection device 12a, 12b is positioned on the base plate 11 in the direction of the arrow Y.
  • the first and second connection device 12a, 12b With the help of the first and second connection device 12a, 12b is the first and second accumulator 6a, 6b can be releasably connected to the machine tool 1 both mechanically and electrically. Due to the detachable connection of the first and second accumulator 6a, 6b, electrical energy can reach the consumers (eg the electric motor) of the machine tool 1 from the two accumulators 6a, 6b. It is possible that only a single accumulator is used to supply the machine tool 1 .
  • the rechargeable battery fall protection device 10 essentially serves to protect the first and second rechargeable battery from an impact or impact in the event of a fall or tipping over of the machine tool 1 .
  • the battery fall protection device 10 essentially contains a first and second protective bar 13a, 13b.
  • the protective brackets 13a, 13b can also be referred to as support frames or frames.
  • Each of the first and second guard bars 13a, 13b includes a first end 14, a second end 15, a left end 16 and a right end 17.
  • the first end 14 of the first and second guard bars 13a, 13b is at the second end 2b of the housing 2 of the machine tool 1 positioned.
  • the first and second protective bar 13a, 13b is releasably connected to the housing 2 of the machine tool 1 by screws.
  • FIG. 4 shows five of the total of eight screw holes or the screw domes SD for the screws for fastening the two protective brackets 13a, 13b to the housing 2 of the machine tool 1.
  • Each protective bracket 13a, 13b is fixed to the housing 2 of the machine tool 1 with four screws. The screws are not shown in the figures.
  • the two protective brackets 13a, 13b are designed in such a way that they are in contact at their second end 15 and are connected to one another. As can be seen in FIG. 3, the two protective bars 13a, 13b form a flat surface at the second end 15. In an assembled state, i.e. when both protective brackets 13a, 13b are connected to the second end 2a of the housing 2 of the machine tool 1, the two protective brackets 13a, 13b form a type of cage with an interior space IR.
  • the first and second accumulator 6a, 6b can be accommodated in the interior space IR between the two protective bars 13a, 13b.
  • the battery interface device 9 is positioned at the second end 2b of the housing 1 of the machine tool 1.
  • the battery interface device 9 is designed to the first and second Accumulator 6a, 6b to be releasably connected to the housing 2 of the machine tool 1.
  • the first accumulator 6a is pushed in the direction of the arrow X onto the first connection device 12a and the second accumulator 6b is pushed counter to the direction of the arrow X onto the second connection device 12b.
  • a damping device 18 is positioned between the housing 2 of the power tool 1 and the battery interface device 9 .
  • the damping device 18 essentially serves to absorb shocks, impacts and other mechanical influences on the battery holder 4.
  • the damping device 18 essentially contains a first and second hinge element 19a, 19b and a damping element 20.
  • Each hinge element 19a, 19b includes a pivot 21, first and second upper hinge straps 22a. 22b and a lower hinge strap 23.
  • the two upper hinge straps 22a. 22b are spaced from each other with the base plate 11 of the battery interface device
  • the lower hinge strip 23 is designed in the form of a continuous hinge chamber with a through hole.
  • the pin 21 is arranged horizontally in the direction of the arrow Z between the upper hinge straps 22 a , 22 b and the lower hinge strap 23 .
  • the damping element 20 is cylindrical and essentially has an oval cross-sectional area with a central through hole 40, see Figure 7.
  • the damping element 20 consists of an elastic material such as rubber.
  • the damping element 20 contains a number of axially running grooves 25a and tongues 25b on an outer lateral surface 24 . In other words: a number of elevations 25b and depressions 25a.
  • the grooves and depressions 25a can also be referred to as elongated recesses.
  • the multiplicity of grooves 25 along the outer lateral surface 24 of the damping element 20 has the effect that the damping element 20 has increased elastic properties.
  • the groove on the top side OS and on the bottom side US of the damping element 20 has a depth of 2 mm.
  • the two springs 25b at the top OS and at the bottom US are respectively
  • the highest elevation of the tongue 25b is 5 mm away from the lowest point of the groove 25a.
  • a first and second damping element 20 is positioned around the pin 21 .
  • the pin 21 is inserted into the through hole 40 .
  • the design of the first and second damping element 20 is identical.
  • the length of each In this case, the damping element 20 corresponds to approximately one third of the length of the pin 21 .
  • the first damping element 20 is positioned at the first end 21a of the pin 21 and the second damping element 20 is positioned at the second end 21b of the pin 21 .
  • a free or hollow space HR is left between the first and second damping element 20 .
  • the cavity HR serves to allow the first and second damping element 20 to expand when deformed.
  • damping device 18 it is possible that instead of a first and second damping element 20 only a single continuous damping element is provided around the pin 21 .
  • a screw nut 26 is provided at the end 21a, 21b of the pin 21 is provided.
  • the battery interface device 9 can move relative to the housing 2 of the machine tool 1 .
  • the battery interface device 9 is decoupled from the housing 2 of the machine tool 1 by the damping device 18 .
  • the damping element 20 is designed in the form of a spring element, in particular a spiral spring element.
  • the value of the spring constant for the damping element 20 is to be selected such that the deflection of the damping element 20 (ie the spring) is minimal.
  • a minimal deflection of the damping element 20 can prevent an impact on the housing 2 of the machine tool 1 (such as when the machine tool falls over) leading to the accumulators 6a, 6b shaking and hitting the ground.
  • E pot spring 1 ⁇ 2 x D x s 2

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Computer Hardware Design (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne une machine-outil, notamment un marteau burineur, comprenant un boîtier et un dispositif d'interface d'accumulateur destiné à relier de façon non définitive au moins un accumulateur à la machine-outil. Un dispositif d'amortissement des chocs se trouve entre le boîtier et le dispositif d'interface d'accumulateur, le dispositif d'amortissement des chocs comprenant au moins un élément d'amortissement qui est agencé dans la direction de la longueur perpendiculairement à un axe de travail de la machine-outil.
EP21740551.3A 2020-07-22 2021-07-12 Dispositif d'amortissement des chocs pour accumulateur Pending EP4185438A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20187105.0A EP3943251A1 (fr) 2020-07-22 2020-07-22 Dispositif d'amortissement des chocs pour un accumulateur
PCT/EP2021/069289 WO2022017846A1 (fr) 2020-07-22 2021-07-12 Dispositif d'amortissement des chocs pour accumulateur

Publications (1)

Publication Number Publication Date
EP4185438A1 true EP4185438A1 (fr) 2023-05-31

Family

ID=71741654

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20187105.0A Withdrawn EP3943251A1 (fr) 2020-07-22 2020-07-22 Dispositif d'amortissement des chocs pour un accumulateur
EP21740551.3A Pending EP4185438A1 (fr) 2020-07-22 2021-07-12 Dispositif d'amortissement des chocs pour accumulateur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20187105.0A Withdrawn EP3943251A1 (fr) 2020-07-22 2020-07-22 Dispositif d'amortissement des chocs pour un accumulateur

Country Status (4)

Country Link
US (1) US20230261302A1 (fr)
EP (2) EP3943251A1 (fr)
CN (1) CN115776926A (fr)
WO (1) WO2022017846A1 (fr)

Families Citing this family (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
CN116979201B (zh) * 2023-09-22 2023-12-12 深圳市蓝之洋科技有限公司 大容量移动储能电源保护系统
CN117199677B (zh) * 2023-11-07 2024-03-01 河南锂动电源有限公司 一种特种作业防爆锂电池组

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006000375A1 (de) * 2006-07-27 2008-01-31 Hilti Ag Handwerkzeuggerät mit Entkoppelungsanordnung
DE102011002404A1 (de) * 2011-01-03 2012-07-05 Robert Bosch Gmbh Handwerkzeugmaschinen-Energieversorgungseinheit
JP6501414B2 (ja) * 2014-03-25 2019-04-17 株式会社マキタ 打撃工具
DE102016215660A1 (de) * 2016-08-22 2018-02-22 Robert Bosch Gmbh Handwerkzeugmaschine und Verfahren zur Dämpfung einer Handwerkzeugmaschine
JP6849088B2 (ja) * 2017-09-29 2021-03-24 工機ホールディングス株式会社 電気機器

Also Published As

Publication number Publication date
EP3943251A1 (fr) 2022-01-26
US20230261302A1 (en) 2023-08-17
WO2022017846A1 (fr) 2022-01-27
CN115776926A (zh) 2023-03-10

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