EP4008491A1 - Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal - Google Patents

Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal Download PDF

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Publication number
EP4008491A1
EP4008491A1 EP20211900.4A EP20211900A EP4008491A1 EP 4008491 A1 EP4008491 A1 EP 4008491A1 EP 20211900 A EP20211900 A EP 20211900A EP 4008491 A1 EP4008491 A1 EP 4008491A1
Authority
EP
European Patent Office
Prior art keywords
machine tool
handle
main body
range
area
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Withdrawn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
EP20211900.4A
Other languages
German (de)
English (en)
Inventor
Roland Meuer
Michael Lanzinger
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 EP20211900.4A priority Critical patent/EP4008491A1/fr
Priority to EP21814764.3A priority patent/EP4255685A1/fr
Priority to CN202180072959.4A priority patent/CN116568442A/zh
Priority to US18/039,363 priority patent/US20240001526A1/en
Priority to PCT/EP2021/081926 priority patent/WO2022117335A1/fr
Priority to JP2023524977A priority patent/JP2023546498A/ja
Publication of EP4008491A1 publication Critical patent/EP4008491A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0008—Means for carrying the chain saw, e.g. handles

Definitions

  • the present invention relates to a machine tool having a first handle, a handle grip and a main body, the second handle protruding beyond a rear side of the main body of the machine tool by a length a to protect the machine tool in the event of a fall.
  • machine tools which are used, for example, to machine substrates or workpieces.
  • hand-held machine tools usually have one or more handles with which the machine tools can be held and/or guided.
  • the handles of the machine tools include actuating switches with which a user can switch the machine tool on or off, for example.
  • two handles on the machine tool, particularly in the case of cut-off grinders that have a cutting disc as a disc-shaped tool.
  • two handles can also be used in other machine tools, preferably in those machine tools in which the tool is arranged in a front region of the machine tool. This can be, for example, various saws, as well as other cutting or separating devices.
  • top-handle machine tools offer insufficient hand spacing between the two handles.
  • the handle often makes no contribution to protecting the machine tool or the accumulators if it is a battery-operated machine tool.
  • the object on which the present invention is based is to overcome the above-described deficiencies and disadvantages of the prior art and to provide a machine tool in which a short overall length is combined with an ergonomic design.
  • the robustness of the machine tool should be increased in order to effectively protect the machine tool and any accumulators that may be present from falls and mechanical damage.
  • a machine tool is provided with a first handle, a second handle and a main body.
  • the machine tool is characterized in that the second handle protrudes from a rear side of the machine tool main body by a length a to protect the machine tool in the event of a fall.
  • this preferably means that the second handle protrudes in a rear spatial direction beyond the main body of the machine tool and thus forms an overhang.
  • the projection preferably has the length a by which the second handle protrudes beyond the rear of the main body of the machine tool.
  • the invention is based on the basic idea of pulling the rear handle over the device body in a spatial direction "backwards" in order to achieve a distance between the first and second handles of the machine tool that is desirable for ergonomic reasons to reach.
  • This ergonomically desirable distance can be achieved in particular by the first handle and the second handle of the machine tool having a distance L in a range from 180 to 350 mm, preferably in a range from 200 to 300 mm and most preferably in a range of 230 to 260mm.
  • distances of 24-25 cm have proven to be optimal for the posture of the user when working with the machine tool.
  • a significant advantage of the invention is therefore the optimized distances between the two gripping positions of the operator's left and right hand, which makes it possible to work in a particularly fatigue-free manner.
  • the distance L is preferably applied between a highest point of the first handle and a central area of the handle area of the second handle.
  • This middle portion of the grip portion of the second handle may preferably coincide with a midpoint of an upper control switch on top of the second handle.
  • the middle portion of the grip portion of the second handle may coincide with the back of the main body of the machine tool.
  • the length L begins in the area of the front handle.
  • the end of the length L can be determined, for example, by the location on the second handle at which the center of a user's palm comes to rest when working with the machine tool.
  • the end of the length L is somewhat in the middle of the gripping area of the second handle, where there can also be operating or locking switches for the machine tool.
  • the invention is in particular a new arrangement of two handles in the field of machine tools.
  • the machine tool can preferably be a hand-held, battery-operated or accumulator-operated machine tool, such as a cut-off grinder or a saw.
  • the robustness of the machine tool can be significantly improved in the event of a fall backwards and, in addition, a particularly ergonomic handling of the machine tool can be made possible.
  • the length a by which the second handle protrudes beyond the rear of the main body of the machine tool is in a range of 30 to 100 mm, preferably in a range of 50 to 80 mm and most preferably in a range of 55 to 70 mm. Drop tests have shown that, in particular, if the second handle protrudes by a length a in a range of 6 to 7 cm, this leads to particularly effective protection of the accumulators.
  • a significant advantage of the invention is that the rear area of the machine tool and the accumulators, which are preferably mounted in a rear and/or lower area of the main body of the machine tool, can be very well protected in the event of a fall, since the accumulators are not the component of the machine tool who is the first to make contact with the ground in the event of a fall.
  • the rear handle of the machine tool As a result, a large part of the energy that is released when the machine tool falls is absorbed by the rear handle of the machine tool.
  • the energy that is released is absorbed in particular by the rear side area of the second handle and by its rounded area.
  • the second handle is designed to be particularly robust and forms an overhang in order to be able to ensure the earliest contact with the ground in the event of a fall.
  • a machine tool with a first accumulator and a second accumulator as an energy source is provided in particular.
  • the machine tool also has a main body and a motor, with the main body having a first accommodation space for accommodating the first rechargeable battery and a second accommodation space for accommodating the second rechargeable battery, with the accommodation spaces being arranged within a housing of the main body in such a way that the rechargeable batteries of are accessible and interchangeable from a rear side of the main body, the accommodation spaces for the accumulators forming a lower end of the main body of the machine tool.
  • the machine tool is a cut-off grinder.
  • the power cutter may include a rear portion formed, for example, by a main body and a protective frame.
  • the main body of the power cutter may be surrounded by a housing and may include a control unit, a drive and/or a drive train and/or a motor.
  • the front part of the machine tool is formed by its tool, which is a disc-shaped tool, in particular if the machine tool is designed as a cut-off grinder. In particular, it can be referred to as a cutting disk.
  • the spatial directions “front” and “back” are defined by the front area of the machine tool formed by the tool and by the rear area of the machine tool formed by the main body, among other things.
  • top and bottom or the "top” and “bottom” of the machine tool are preferably defined by the top handle (“top”), which is preferably also referred to as the second handle within the meaning of the invention, and by the Protective frame, the underside of which preferably runs on the underside of the machine tool.
  • top handle which is preferably also referred to as the second handle within the meaning of the invention
  • Protective frame the underside of which preferably runs on the underside of the machine tool.
  • the machine tool comprises a first, circumferential handle and a second, upper handle.
  • the first circumferential handle preferably runs in the area of the transition between the front and rear areas of the machine tool and is usually gripped by the left hand of a right-handed person using the machine tool.
  • the first, circumferential handle can also be used to transport the machine tool. Due to the circumferential design of the first handle, the first handle offers effective impact protection on the sides of the machine tool, especially if the machine tool would hit the right or left side of the device if it were to fall.
  • the circumferential configuration of the first handle protects in particular the components of the machine tool arranged in the main body of the machine tool, such as the motor, drive or gearing, but also the accumulators.
  • a plane in which the first handle predominantly runs runs essentially orthogonally to a longitudinal axis of the machine tool.
  • the longitudinal axis which can be placed conceptually through the machine tool, runs in particular centrally through the device and extends from the front area of the machine tool in the direction of its rear area. It is in According to the invention, it is preferred that the plane in which the first handle mainly runs is essentially perpendicular to the longitudinal axis of the machine tool.
  • the second handle is usually gripped by the right hand of a right-handed person using the machine tool.
  • the upper handle protrudes in a rear spatial direction beyond the main body of the machine tool, so that the main body and its internal components are well protected against a fall and landing of the machine tool on the rear of the device.
  • An overhang is preferably formed by protruding the second handle beyond the rear of the main body of the machine tool.
  • the term “overhang” preferably describes the distance between a rear wall of the main body of the machine tool, which runs essentially vertically, and a point at the maximum distance from a rear part of the upper handle. This distance or overhang has the length a.
  • the second handle is arranged above electronics of the machine tool and includes actuating switches for the machine tool on its upper side and/or its underside. Since the second handle of the machine tool is usually held by the right hand of a user, the machine tool can be operated particularly well by the provision of the actuating switch on the top and/or bottom of the second handle. It is preferred within the meaning of the invention that the area of the second handle that has the at least one actuating switch is referred to as the handle area of the upper handle. A longitudinal axis running centrally through the grip area preferably does not run parallel to a base on which the machine tool can be placed, but is inclined at an angle of inclination A.
  • the second handle has a grip area, the grip area being inclined by an angle of inclination alpha, the angle of inclination alpha being in a range from 10 to 30 degrees, preferably in a range from 15 to 25 degrees and most preferably in the range of 18 to 21 cm.
  • This inclination can significantly improve the ergonomics of the upper handle.
  • the grip portion of the top handle is substantially perpendicular to a rear side portion of the top handle. This rear side part of the upper handle thus also runs inclined by the above-mentioned angle of inclination of approximately 20 degrees in relation to a rear wall of the main body of the machine tool which runs essentially vertically. Tests have shown that the inclination of the second handle of the machine tool significantly improves the ergonomics of the machine tool.
  • the second handle has a rear side area which has a height h in a range from 70 to 150 mm, preferably in a range from 80 to 120 mm and most preferably in a range from 85 to 100mm
  • the rear side area is preferably also referred to as the rear side part.
  • the height h can be defined as the distance between the longitudinal axis running centrally through the handle area of the second handle and an area in which the rear side area of the second handle opens into the machine tool or the protective frame of the machine tool. Details can off 1 be removed.
  • a height h in the range of 8.5 cm has proven to be the optimal average for easy handling of the machine tool and sufficient space for the reach-through area between the second handle and the top of the machine tool on the one hand and compactness and robustness of the device on the other Side.
  • the proposed machine tool can include a protective frame, the underside of which preferably runs on the underside of the machine tool.
  • the protective frame has an L-shaped structure, in particular in a side view of the machine tool.
  • the lower bar of the “L” runs on the underside of the machine tool, while the bar of the preferably inverted “L” that projects vertically upwards runs along the essentially vertical rear wall of the main body of the machine tool.
  • Such a simple L-structure is preferably present both on the right and on the left side of the machine tool, so that the L-shaped structure is preferably also referred to as “lateral L-shaped structure” within the meaning of the invention. It preferably runs around the main body of the machine tool.
  • the two individual L-shaped structures are preferably connected to one another via connecting webs, one of the connecting webs running through an inner space or reach-through space of the upper handle.
  • Another connecting bar runs in the area of the first handle and connects the two L-shaped structures with each other.
  • the bars of the L-shaped structure of the protective frame which protrude vertically upwards, form its rear side.
  • the accumulators of the machine tool are arranged in the interior of the protective frame. In other words, the accumulators can be surrounded by the elements of the protective frame, so that the protective frame protects the accumulators against mechanical damage, for example in the event of a lateral fall.
  • the rounded area there is a rounded area between the handle area and the rear side area of the second handle, the rounded area having a radius R with a length in a range from 40 to 60 mm, preferably in a range from 45 to 55 mm and most preferably in a range of 48 to 52 mm.
  • the drop tests carried out have shown that a combination of an overhang of 6-7 cm and a radius R in a range of 5 cm leads to particularly effective protection for the accumulators of the machine tool.
  • figure 1 shows a preferred embodiment of a proposed machine tool 1 with a first handle 2 and a second handle 3.
  • the second handle 3 includes a grip area 6, which can be covered by a hand of the user of the machine tool 1 when the user is working with the machine tool 1.
  • the second handle 3 has a rear side area 7 which connects the second handle 3 to the machine tool 1 or the protective frame of the machine tool 1 .
  • the handle area 6 and the rear side area 7 of the second handle 3 enclose an essentially right angle with one another, the term "essentially right angle" not being an unclear term for the person skilled in the art.
  • the handle area 6 and the rear side area 7 enclose an angle with one another which represents a 90 degree angle within the scope of manufacturing accuracy, but which is within an angle range of +/- 5 degrees from an exact mathematical orthogonality may vary.
  • the transition from the handle area 6 to the rear side area 7 is formed by a rounded area 8 .
  • the rounded area 8 has a radius with a length of 5 cm, for example.
  • the grip area 6 of the second handle 3 is designed to be inclined by an angle of inclination alpha.
  • This angle of inclination alpha is preferably in a range of 18 to 21 degrees, as a result of which improved ergonomics of the machine tool 1 can be provided.
  • the machine tool 1 has a main body 4 which can be present in a housing.
  • the accumulators 9 of the machine tool 1 can be present in a lower area of the main body 4 of the machine tool 1 .
  • accommodation spaces for accommodating the accumulators 9 can be provided.
  • the accumulators 9 are arranged in a rear, lower area of the main body 4 of the machine tool 1, where they are particularly well protected against mechanical damage caused by a fall. This protection is achieved in particular by the overhang of the length a by which the grip area 6 of the second handle 3 extends beyond the rear side 5 of the main body 4 of the machine tool 1 .
  • the proposed machine tool 1 has two accumulators 9 as an energy source.
  • FIG 2 shows another side view a preferred embodiment of the proposed machine tool 1.
  • the arrow in the upper left corner of the figure is intended to symbolize the direction of a possible fall.
  • the arrow points in the “down” spatial direction.
  • the line-shaped arrow between the base and the back 5 of the machine tool 1 preferably symbolizes the protection of the machine tool 1 or the accumulators 9 by the projection of the second handle 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Battery Mounting, Suspending (AREA)
  • Portable Power Tools In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP20211900.4A 2020-12-04 2020-12-04 Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal Withdrawn EP4008491A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP20211900.4A EP4008491A1 (fr) 2020-12-04 2020-12-04 Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal
EP21814764.3A EP4255685A1 (fr) 2020-12-04 2021-11-17 Machine-outil ayant une première poignée, une seconde poignée et un corps principal
CN202180072959.4A CN116568442A (zh) 2020-12-04 2021-11-17 具有第一手柄、第二手柄和主体的动力工具
US18/039,363 US20240001526A1 (en) 2020-12-04 2021-11-17 Power tool having a first handle, a second handle, and a main body
PCT/EP2021/081926 WO2022117335A1 (fr) 2020-12-04 2021-11-17 Machine-outil ayant une première poignée, une seconde poignée et un corps principal
JP2023524977A JP2023546498A (ja) 2020-12-04 2021-11-17 第１のハンドルと第２のハンドルと本体とを有する工作機械

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20211900.4A EP4008491A1 (fr) 2020-12-04 2020-12-04 Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal

Publications (1)

Publication Number Publication Date
EP4008491A1 true EP4008491A1 (fr) 2022-06-08

Family

ID=73726665

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20211900.4A Withdrawn EP4008491A1 (fr) 2020-12-04 2020-12-04 Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal
EP21814764.3A Withdrawn EP4255685A1 (fr) 2020-12-04 2021-11-17 Machine-outil ayant une première poignée, une seconde poignée et un corps principal

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21814764.3A Withdrawn EP4255685A1 (fr) 2020-12-04 2021-11-17 Machine-outil ayant une première poignée, une seconde poignée et un corps principal

Country Status (5)

Country Link
US (1) US20240001526A1 (fr)
EP (2) EP4008491A1 (fr)
JP (1) JP2023546498A (fr)
CN (1) CN116568442A (fr)
WO (1) WO2022117335A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023119516A1 (de) 2023-03-31 2024-10-02 Andreas Stihl Ag & Co. Kg Handgeführtes, im Einsatz tragbares Arbeitsgerät

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EP4255685A1 (fr) 2023-10-11

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