EP4321303A1 - Machine-outil dotée d'un élément de protection - Google Patents

Machine-outil dotée d'un élément de protection Download PDF

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Publication number
EP4321303A1
EP4321303A1 EP22189233.4A EP22189233A EP4321303A1 EP 4321303 A1 EP4321303 A1 EP 4321303A1 EP 22189233 A EP22189233 A EP 22189233A EP 4321303 A1 EP4321303 A1 EP 4321303A1
Authority
EP
European Patent Office
Prior art keywords
machine tool
battery interface
housing
interface device
side handle
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
EP22189233.4A
Other languages
German (de)
English (en)
Inventor
Thomas Bader
Karin Groth
Timo Seel
Manuel Rosenzweig
Juan ZHU
Torsten Tussing
Mark Duling
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 EP22189233.4A priority Critical patent/EP4321303A1/fr
Priority to PCT/EP2023/070564 priority patent/WO2024033075A1/fr
Publication of EP4321303A1 publication Critical patent/EP4321303A1/fr
Pending 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
    • B25F5/006—Vibration damping means
    • 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
    • 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
    • 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
    • B25D2250/121—Housing details
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other

Definitions

  • the present invention relates to a machine tool, in particular a chisel hammer, according to the type defined in more detail in the preamble of patent claim 1.
  • a percussion hammer with a housing is known, with a center of gravity of the machine tool being arranged essentially on the working axis.
  • the machine tool has a battery interface via which a battery pack can be detachably connected to the machine tool.
  • the handles are each connected to the housing via a damping unit. It is further disclosed that the battery pack is arranged below a handle and is protected by a protective element connected to the handle.
  • protection of the battery pack in such an embodiment can be insufficient or undesirably low, particularly in the event of a fall of the machine tool or in the event of impacts.
  • a machine tool in particular a chisel hammer, is proposed with a housing, a working axis running in a longitudinal direction, at least one battery interface device for releasably connecting at least one battery to the machine tool and a first side handle and a second side handle, the side handles being essentially symmetrical the working axis are arranged, with at least one decoupling device being provided for the vibration-damping connection of the side handles to the housing, with at least one battery interface device being coupled to a side handle, with at least one protective device being provided for protecting an accumulator coupled to the battery interface device, and wherein the at least one Protective device has an interior for at least partially accommodating the at least one battery.
  • the protective device is connected directly to the housing or is an integral part of the housing.
  • a machine tool designed according to the invention has the advantage that at least one accumulator connected to the at least one battery interface device is protected from damage to the desired extent in a simple manner, particularly in all operating states of the machine tool. This is achieved by the housing-fixed arrangement of the protective device, through which the protective device can be made particularly stable and robust and transmits forces acting on it directly to the housing of the machine tool.
  • the protective device is arranged on the housing independently of the decoupling device. In the solution according to the invention, the protective device is therefore not subject to the damping properties of the decoupling device, whereby improved protection of an accumulator connected to the battery interface device can be achieved.
  • the decoupling device is also particularly well protected by the arrangement of the at least one protective device fixed to the housing, since the at least one decoupling device is at least not directly exposed to impacts, impacts or the like, for example in the event of a fall or fall of the machine tool due to the non-direct connection to the protective device.
  • the at least one battery interface device connected to a side handle creates a decoupling of an accumulator connected to the battery interface device from the housing during operation of the machine tool, so that vibrations and shocks that occur during operation of the machine tool are only affected to a greatly reduced extent on the battery interface device and thus also act on an accumulator connected to the battery interface device.
  • a connection of the protective device to the housing can be either non-detachable or detachable.
  • the first side handle and the second side handle each define a first main extension direction and a second main extension direction, respectively, wherein the main extension directions in an unloaded state of the side handles are arranged in particular essentially perpendicular to the longitudinal direction and extend essentially in a transverse direction.
  • a center of gravity of the machine tool in an upright position is preferably essentially on the working axis.
  • the installation height of the machine tool in the longitudinal direction is advantageously low.
  • a user's view of the machine tool is advantageously not obstructed by the accumulator.
  • a center of gravity of the proposed machine tool is advantageously arranged close to a processing surface.
  • This also reduces a maximum fall height of an accumulator connected to the battery interface device during operation of the machine tool compared to an arrangement of the battery in an end region of the machine tool facing away from the tool holder, so that the risk of damage to an accumulator connected to the battery interface device is reduced.
  • the decoupling device reduces mechanical effects on a user who holds the machine tool by the side handles during operation of the machine tool, such as impacts, shocks or the like.
  • an accumulator connected to the battery interface device is also protected from mechanical influences by the decoupling device or their effects on an accumulator connected to the battery interface device are greatly reduced.
  • At least two battery interface devices are provided, with a first battery interface device being operatively connected to a first side handle and a second battery interface device being operatively connected to a second side handle, with each battery interface device being assigned a protective device.
  • a common protective device is provided for at least two battery interface devices.
  • a protective device can be arranged particularly easily on the housing using a screw connection. This makes it easy to replace a protective device.
  • at least one protective device can be arranged on the housing by means of at least one clamp connection, for example a tension band or the like.
  • An arrangement of a protective device is particularly simple and freedom in the design of the protective device is particularly great if at least one protective device is designed in at least two parts.
  • At least one interior of a protective device is designed in such a way that, when the accumulator is connected to a battery interface device, movement of at least one associated accumulator in a direction of movement or about an axis of rotation to a defined extent is made possible. In this way, contact between the mutually movable protective device and an accumulator connected to a battery interface device can be reliably prevented during operation of the machine tool in a simple manner.
  • At least one protective device is designed such that when the battery is connected to the battery interface device and the machine tool falls in any direction, the at least one protective device comes into contact with a flat surface in front of the battery connected to the battery interface device. In this way, particularly good protection of an accumulator connected to a battery interface device can be ensured in any operating situation.
  • An improved embodiment of the invention with respect to a center of gravity, a user's view in the direction of a work area and a structural length of the machine tool is achieved when the battery interface devices are arranged with respect to the longitudinal direction on a side of the respective side handle facing a tool holder and in particular connected directly to the respective side handle are.
  • At least one protective device can have a recess pointing essentially in the transverse direction for the operative connection of a battery to the battery interface device.
  • the protective device is designed in such a way that an accumulator can be arranged on the respective battery interface device in any oriented insertion direction.
  • An insertion device for the operative connection of a battery with a battery interface device can have an angle relative to a main extension direction of the respective side handle, the angle being between -30° and 90°, in particular between 0° and 30° and preferably being approximately 20°.
  • At least one battery interface device has at least two connection areas Connection of the respective battery interface device to the respective side handle, with two connection areas being spaced apart from one another in the transverse direction. In this way, a secure and stable connection of the battery interface device to the respective side handle can be achieved.
  • the battery interface device can be flexibly connected to the respective side handle in at least one connection area. This makes it possible to achieve additional damping of an accumulator connected to the battery interface device. This can be particularly advantageous if the decoupling device of the respective side handle is in an extreme position in an operating state in which damping properties of the decoupling device are reduced or the decoupling device has no damping properties.
  • the battery interface device is articulated to the respective side handle in at least one connection area. It can also be provided that the battery interface device is firmly or rigidly connected to the respective side handle in both connection areas.
  • a first decoupling device which has a first spring device and a first lever device, by means of which the first side handle is rotatably articulated to a first pivot point fixed to the housing
  • a second decoupling device which a second spring device and a second lever device, by means of which the second side handle is rotatably articulated to a second pivot point fixed to the housing
  • the first spring device being mounted fixed to the housing on the one hand and connected to the first lever device on the other hand
  • the second spring device being mounted fixed to the housing on the one hand and on the other hand is connected to the second lever device.
  • the spring devices are designed in particular as tension springs and reduce vibrations acting on the side handles during operation of the machine tool.
  • a machine tool 1 is shown in the form of a chisel hammer. However, it is also possible for the machine tool 1 to be designed in the form of a screwdriver, a drill, a hammer drill or the like.
  • the machine tool 1 designed as a chisel hammer is in a rest position in the figures, i.e. H. shown in a non-actuated state and has a housing 3, which can be made in one piece or in several parts. Furthermore, the machine tool 1 has a first side handle 5 and a second side handle 7, which are essentially symmetrical to a working axis 9, which defines a longitudinal axis or longitudinal direction of the machine tool 1. In the present case, a tool holder 11 is in engagement with a tool 13 designed as a chisel, which lies in the working axis 9.
  • the striking device can also be referred to as a striking mechanism or striking 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 11. Neither the electric motor nor the impact device are shown in the figures.
  • a first accumulator 15 and a second accumulator 17 are provided in the present case, the first accumulator 15 being in operative connection with a first battery interface device 19 and the second accumulator 17 being in operative connection with a second battery interface device 21 .
  • the housing 3 has a lower end 23 in the longitudinal direction 9, in the area of which the tool holder 11 is provided, and an opposite upper end 25. Furthermore, the housing 3 has a first side area 27 and a second side area 29. The side regions 27, 29 form opposite boundaries of the housing 3 in the transverse direction 31.
  • the transverse direction 31 is perpendicular to the working axis 9 and in the present case is essentially identical to the main extension directions 33, 35 of the side handles 5, 7 in the idle state of the machine tool 1.
  • the first side handle 5 is arranged in the first side area 27 and the second side handle 7 in the second side area 29 of the housing 3.
  • Fig. 3 decoupling device 37 which can be seen in more detail, is provided, by means of which the side handles 5 and 7 are decoupled to a certain extent from the housing 3 and thus from shocks, vibrations and the like transmitted to the housing 3 via the chisel 13 during operation of the machine tool 1.
  • the decoupling device 37 has a first decoupling device 39 assigned to the first side handle 5 and a second decoupling device 41 assigned to the second side handle 7.
  • the first decoupling device 39 has a first spring device designed as a tension spring 43 and a first lever device 45, the first lever device 45 being articulated on the one hand to a first pivot point 47 fixed to the housing and on the other hand being connected to the first side handle 5.
  • the first tension spring 43 is, on the one hand, mounted fixed to the housing and, on the other hand, is connected to a first articulation point 49, which lies between the first pivot point 47 fixed to the housing and the first side handle 5.
  • the first side handle 5 can thus be displaced relative to the housing 3 in a circular section-shaped movement about the first pivot point 47 fixed to the housing, so that the first main extension direction 33 can be rotated relative to the transverse direction 31 by a certain angular range.
  • the second decoupling device 41 has a second spring device designed as a tension spring 51 and a second lever device 53, the second lever device 53 being articulated on the one hand to a second pivot point 55 fixed to the housing and, on the other hand, being connected to the second side handle 7.
  • the second tension spring 51 is, on the one hand, mounted fixed to the housing and, on the other hand, is connected to a second articulation point 57, which lies between the first pivot point 47 fixed to the housing and the first side handle 5.
  • the second side handle 7 can thus be displaced relative to the housing 3 in a circular section-shaped movement about the second pivot point 55 fixed to the housing, so that the second main extension direction 35 can be rotated relative to the transverse direction 31 by a certain angular range.
  • the first pivot point 47 fixed to the housing is arranged in the transverse direction 31 between the second pivot point 55 fixed to the housing and the second side handle 7. Consequently, the second pivot point 55 fixed to the housing is arranged in the transverse direction 31 between the first pivot point 47 fixed to the housing and the first side handle 5.
  • the lever devices 45 and 53 are designed to be curved in opposite directions in such a way that they enable a simultaneous movement of the first side handle 5 and the second side handle 7 in the direction of the working axis downwards and upwards by a rotational movement about the respective pivot point 47 or 55 fixed to the housing.
  • each decoupling device 39, 41 is assigned two tension springs 43, 51, so that two tension springs 43 interact with the first lever device 45 and two tension springs 51 with the second lever device 53.
  • the first battery interface device 19 is arranged on the first side handle 5. Comparable to this, the second battery interface device 21 is arranged on the second side handle 7.
  • the first battery interface device 19 is designed to be essentially mirror-symmetrical to the second battery interface device 21, with the connection of the second battery interface device 21 to the second side handle 7 being described below as representative of the connection of the first battery interface device 19 to the first side handle 5.
  • the second battery interface device 21 has a substantially flat base plate 61 and a connection device 63 for receiving the second battery 17, the second battery 17 being operatively connected to the connection device 63 via a movement in the insertion direction 65 and detachable from the connection device 63 in an oppositely oriented direction of movement is.
  • the connection device 63 With the help of the connection device 63, the second accumulator 17 can be releasably connected to the machine tool 1, both mechanically and electrically. Due to the releasable connection of the second accumulator 17, electrical energy can be transferred from the accumulators 15, 17 to the consumers, e.g. B. the electric motor, the machine tool 1. It is possible for only a single accumulator to be used to supply the machine tool 1.
  • the insertion direction 65 has an angle 67 relative to the second main extension direction 35 of the second side handle 7, the angle 67 in the present case being approximately 20°.
  • the second battery interface device 21 in the present case has a first connection area 69 and a second connection area 71, the second battery interface device 21 being connected to the second side handle 7 via the two connection areas 69 and 71 without a connection fixed to the housing.
  • the first connection area 69 and the second connection area 71 are arranged at a distance from one another in the transverse direction 31, with the first connection area 69 being arranged in an area facing the working axis 9 and the second connection area 71 being arranged in an area facing the second side handle 7.
  • the second battery interface device 21 is essentially rigidly connected to the second side handle 7 in an area bordering the housing 3.
  • the second connection area 71 is designed to be flexible and allows the second battery interface device 21 to move relative to the second side handle 7, so that an additional decoupling of the second battery interface device 21 relative to the housing 3 is thereby created.
  • Each battery interface device 19, 21 is assigned a protective device 75 or 77 here, which protects the accumulators 15 and 17 in the event of a fall or the machine tool 1 falling over, as simplified in Fig. 4 shown, protect against a blow or impact.
  • the protective devices 75 are designed in such a way that, for example, if the machine tool 1 falls over in any operating state in front of the respective accumulator 15 or 17, it comes into contact with a flat surface 79 of a subsurface and thereby protects the respective accumulator 15, 17 from a blow or .Protect serve.
  • Both the first protective device 75 and the second protective device 77 are arranged on the housing 3, so that the first battery interface device 19 and the second battery interface device 21 can be moved relative to the first protective device 75 and the second protective device 77, respectively.
  • the first protective device 75 and the second protective device 77 are arranged essentially mirror-symmetrically to the working axis 9 and designed to one another.
  • the second protective device 77 is described in more detail below as a representative of the first protective device 75.
  • the second protective device 77 is designed in two parts with a first part 81 and a second part 83, the first part 81 being able to be releasably brought into operative connection with the second part 83, in particular via several screw connections.
  • the interconnected parts 81, 83 can be detachably arranged on the housing 3 via several screw connections.
  • the first part and/or the second part is firmly, ie permanently, connected to the housing 3 of the machine tool 1 and is formed, for example, integrally with the housing 3.
  • the first part 81 and the second part 83 have a circumferential frame 85 or 87 or brackets, which are connected to one another via one or more connecting elements 89.
  • the connecting elements 89 are preferably formed together by the first part 81 and the second part 83.
  • the connecting elements 89 are preferably arranged on a side of the protective devices 77, 79 facing the tool holder 11.
  • the second protective device 77 has a recess 91, which enables the battery 17 to be arranged in the insertion direction 65 on the second battery interface device 21.
  • the recess can also be provided at other positions, so that an arrangement of the battery on the second battery interface device with basically almost any oriented insertion directions 65 is possible.
  • the protective device 77 In a mounted state of the second protective device 77, i.e. when the two parts 81 and 83 are connected to one another and are connected to the housing 3 of the machine tool 1, the protective device 77 forms a kind of cage with an interior 93.
  • the protective device 77 is designed in this way in the present case that the accumulator 17 in the present case can be arranged completely in the interior 93 defined by the protective device 77.
  • the interior 93 of the protective device 77 is designed in such a way that the accumulator 17 can be displaced around the pivot point 55 fixed to the housing by a defined angular range, which occurs in particular during operation of the machine tool 1, without coming into contact with the protective device 77.
  • the protective device 77 can also be in one piece or in several parts.
  • the parts 81, 83 can basically have any design and do not have to form a surrounding frame.
  • the accumulator is not completely arranged in the interior when the machine tool is in an unloaded state, but rather protrudes at least partially from the interior.
  • the protective device is preferably designed in such a way that in the event of a fall or fall of the machine tool in a fundamentally arbitrary direction, the protective device first comes into contact with a flat surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
EP22189233.4A 2022-08-08 2022-08-08 Machine-outil dotée d'un élément de protection Pending EP4321303A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22189233.4A EP4321303A1 (fr) 2022-08-08 2022-08-08 Machine-outil dotée d'un élément de protection
PCT/EP2023/070564 WO2024033075A1 (fr) 2022-08-08 2023-07-25 Machine-outil dotée d'un élément de protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22189233.4A EP4321303A1 (fr) 2022-08-08 2022-08-08 Machine-outil dotée d'un élément de protection

Publications (1)

Publication Number Publication Date
EP4321303A1 true EP4321303A1 (fr) 2024-02-14

Family

ID=82850293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22189233.4A Pending EP4321303A1 (fr) 2022-08-08 2022-08-08 Machine-outil dotée d'un élément de protection

Country Status (2)

Country Link
EP (1) EP4321303A1 (fr)
WO (1) WO2024033075A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016165784A (ja) * 2015-03-10 2016-09-15 株式会社マキタ 打撃工具
JP2016165783A (ja) * 2015-03-10 2016-09-15 株式会社マキタ 打撃工具
US20190232478A1 (en) * 2018-01-26 2019-08-01 Milwaukee Electric Tool Corporation Percussion tool
DE102018210189A1 (de) 2018-06-22 2019-12-24 Robert Bosch Gmbh Werkzeugmaschine
EP3766639A1 (fr) * 2019-07-18 2021-01-20 Hilti Aktiengesellschaft Machine-outil manuelle
EP3822034A1 (fr) * 2019-11-14 2021-05-19 Hilti Aktiengesellschaft Procédé de commande et de réglage d'une machine-outil
EP3943251A1 (fr) * 2020-07-22 2022-01-26 Hilti Aktiengesellschaft Dispositif d'amortissement des chocs pour un accumulateur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016165784A (ja) * 2015-03-10 2016-09-15 株式会社マキタ 打撃工具
JP2016165783A (ja) * 2015-03-10 2016-09-15 株式会社マキタ 打撃工具
US20190232478A1 (en) * 2018-01-26 2019-08-01 Milwaukee Electric Tool Corporation Percussion tool
DE102018210189A1 (de) 2018-06-22 2019-12-24 Robert Bosch Gmbh Werkzeugmaschine
EP3766639A1 (fr) * 2019-07-18 2021-01-20 Hilti Aktiengesellschaft Machine-outil manuelle
EP3822034A1 (fr) * 2019-11-14 2021-05-19 Hilti Aktiengesellschaft Procédé de commande et de réglage d'une machine-outil
EP3943251A1 (fr) * 2020-07-22 2022-01-26 Hilti Aktiengesellschaft Dispositif d'amortissement des chocs pour un accumulateur

Also Published As

Publication number Publication date
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