EP4321302A1 - Dispositif d'amortissement des chocs pour un accumulateur - Google Patents

Dispositif d'amortissement des chocs pour un accumulateur Download PDF

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Publication number
EP4321302A1
EP4321302A1 EP22189232.6A EP22189232A EP4321302A1 EP 4321302 A1 EP4321302 A1 EP 4321302A1 EP 22189232 A EP22189232 A EP 22189232A EP 4321302 A1 EP4321302 A1 EP 4321302A1
Authority
EP
European Patent Office
Prior art keywords
machine tool
housing
protective device
side handle
battery interface
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
EP22189232.6A
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 EP22189232.6A priority Critical patent/EP4321302A1/fr
Priority to PCT/EP2023/070571 priority patent/WO2024033076A1/fr
Publication of EP4321302A1 publication Critical patent/EP4321302A1/fr
Pending 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
    • B25D17/04—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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • 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
    • 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
    • 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 chisel hammer with a housing wherein a drive device of the chisel hammer can be supplied with energy from accumulators.
  • Two laterally arranged handles are provided, with a decoupling device being provided which is intended to reduce vibrations acting on the handles during operation.
  • the chisel hammer is intended for the arrangement of two accumulators, which can each be arranged on a side of the housing facing away from a tool holder and thus above the housing by means of a battery interface device on the housing.
  • a protective device is provided to protect the batteries.
  • such a chisel hammer has a large construction height in the longitudinal direction of the chisel hammer.
  • the accumulators can be exposed to large forces due to the possibly large fall height, so that a protective device must be particularly stable and solid
  • 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, with a housing, a working axis running in a longitudinal direction, at least one battery interface device for a releasable connection of at least one battery to the machine tool and a first side handle with a first main extension direction and a second side handle with a second main extension direction, wherein the side handles are arranged substantially symmetrically to the longitudinal direction, wherein at least one decoupling device is provided for the vibration-damping connection of the side handles to the housing, wherein a protective device is provided for protecting an accumulator coupled to the battery interface device, and wherein the protective device has an internal volume of at least partially accommodating the at least one accumulator.
  • the protective device encompasses the housing in the circumferential direction with respect to the longitudinal direction and is connected to at least one side handle via at least one connecting device.
  • a machine tool designed according to the invention has the advantage that accumulators connected to the at least one battery interface device can be easily protected against damage to the desired extent, particularly in all operating states of the machine tool. This is achieved by the design of the protective device encompassing the housing, which means that the protective device can be supported on the housing in a simple manner. In addition, accumulators connected to the battery interface device are protected from vibrations during operation by coupling the battery interface device to the side handles that are decoupled from the housing by means of the decoupling device.
  • a machine tool designed according to the invention has an advantageously low installation height in the longitudinal direction of the machine tool.
  • the protective device encompasses the housing and is therefore not arranged on a side of the housing facing away from a tool holder.
  • a center of gravity of the proposed machine tool is advantageously arranged close to a processing surface. This also ensures a maximum fall height
  • the accumulator connected to the battery interface device is reduced in operation of the machine tool compared to an arrangement of the accumulator 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 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 preferably lies essentially on a working axis of the machine tool defined by the tool holder.
  • 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.
  • the connecting device enables the protective device to move essentially in the longitudinal direction relative to the housing. This makes it easy to decouple the protective device and thereby also the battery interface device from the housing.
  • the housing can act as a guide for the protective device and contribute to the stability of the protective device.
  • the connecting device has at least two levers, the protective device being connected to the first side handle by means of a first lever and to the second side handle by means of a second lever.
  • the protective device is coupled to the side handles via the levers and is protected from vibrations acting on the housing during operation of the machine tool by the decoupling device, comparable to the side handles.
  • the connecting device has at least two flexible elements, the protective device being connected to the by means of a first flexible element first side handle and connected to the second side handle by means of a second flexible element.
  • the flexible elements can further dampen vibrations affecting the protective device and thus also the accumulators during operation of the machine tool.
  • additional protection is also guaranteed in the event of a fall or fall of the machine tool.
  • the flexible elements are made of an elastomeric material.
  • any materials with resilient or damping properties can be used.
  • the protective device can have a first stop area and the housing can have a second stop area, the protective device and the housing coming into contact with one another via the stop areas when the Protective device relative to the housing is displaced in the longitudinal direction from a rest position by a defined limit value.
  • the protective device has a third stop area and the housing has a fourth stop area, the third stop area and the fourth stop extending essentially in the longitudinal direction.
  • the third stop area which are preferably designed to be circumferential
  • guidance of the protective device relative to the housing is created to dampen vibrations.
  • this interaction ensures that the protective device is supported on the housing, for example in the event of a fall or fall of the machine tool.
  • 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 if the protective device and thus also the battery interface device and an accumulator optionally connected to the battery interface device are on a side facing a tool holder with respect to the longitudinal direction of the respective side handle and in particular in the longitudinal direction below the side handles.
  • the protective device has at least two battery interface devices, the battery interface devices being arranged in particular substantially symmetrically to the longitudinal axis. It can also be provided that the protective device has three, four or more battery interface devices. At least one accumulator can be connected to a battery interface device. It can also be provided that two, three or more accumulators can be operatively connected to a battery interface device.
  • At least one protective device can have a recess pointing essentially perpendicular to the longitudinal direction and perpendicular to a transverse direction for the operative connection of an accumulator to the battery interface device.
  • the protective device is designed in such a way that an arrangement of a battery on the respective battery interface device in any oriented insertion direction is possible.
  • 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.
  • 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 shown in the figures in a rest position, ie a non-actuated state, and has a housing 3, which can be designed 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 battery interface devices 19, 21 are arranged on a protective device 75, which will be discussed in more detail later.
  • 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, which is opposite the first side area 27 in the transverse direction 31.
  • 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 connected at the other end 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.
  • 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 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.
  • the protective device 75 is arranged on a side of the side handles 5, 7 facing the tool holder 11 and has a housing 77 which surrounds or surrounds the housing 3 of the machine tool 1 on the circumference.
  • the protective device 75 is designed essentially symmetrically to a central longitudinal plane of the machine tool 1.
  • the protective device 75 is connected to the side handles 5, 7 via a connecting device 78.
  • the connecting device 78 comprises a first lever 79, by means of which the protective device 75 is connected to the first side handle 5, and a second lever 81, by means of which the protective device 75 is connected to the second side handle 9.
  • the first lever 79 has a first articulation point 83 in an area of the first side handle 5 close to the housing and a second articulation point 84 in an outer area of the protective device 75 in the transverse direction 31.
  • the second lever 81 has a third articulation point 85 in a region of the second side handle 7 close to the housing and a fourth articulation point 86 in an outer region of the protective device 75 in the transverse direction 31.
  • the second articulation point 84 and the fourth articulation point 86 are thus arranged in areas of the protective device 75 that are far apart from one another in the transverse direction 31.
  • the protective device 75 can be moved via the linkage by means of the levers 79 and 81 to the side handles 5, 7 during operation of the machine tool 1 with the side handles 5, 7 relative to the housing 3 of the machine tool 1, the protective device 75 being connected via the interaction of the decoupling device 37 the levers 79, 81 can be displaced to a defined extent in the longitudinal direction 9 relative to the housing 3 of the machine tool 1 during operation of the machine tool 1.
  • the housing 77 of the protective device 75 has a first stop area 87 and that Housing 3 has a second stop area 88 intended to cooperate with the first stop area 87.
  • the first stop area 87 and the second stop area 88 have a defined distance from one another in the longitudinal direction 9 in the rest position of the machine tool 1.
  • the housing 77 of the protective device 75 comes over the first stop area after overcoming the distance 87 in contact with the second stop area 88 of the housing 3. This provides additional support for the Protective device 75 on the housing 3 and thereby also improved protection of accumulators 15, 17 connected to the battery interface devices 19, 21.
  • the protective device 75 in this case has a third, preferably completely circumferential stop area 89.
  • the housing 3 has a fourth stop area 90, which is intended to cooperate with the third stop area 89 of the protective device 75.
  • the protective device 75 preferably lies on the housing 3 over a continuous area in the longitudinal direction 9 so that a good supporting effect is achieved and accumulators 15, 17 connected to the battery interface devices 19, 21 are particularly well protected.
  • the first battery interface device 19 is here in an area of the protective device 75 assigned to the first side handle 5, i.e. H. arranged on the same side of the machine tool 1 with respect to the transverse direction 31 as the first side handle 5.
  • the second battery interface device 21 in an area of the protective device 75 assigned to the second side handle 7, i.e. H. arranged on the same side of the machine tool 1 with respect to the transverse direction 31 as the second side handle 7 and on a side of the machine tool 1 opposite the side of the first side handle 5.
  • the first battery interface device 19 is designed to be essentially mirror-symmetrical with respect to the working axis 9 to the second battery interface device 21, with the first battery interface device 19 being described below as a representative of the second battery interface device 21.
  • the first battery interface device 19 has a substantially flat base plate 61 and a connection device 63 for receiving the first battery 15, the first battery 15 being operatively connected to the connection device 63 via a movement in the insertion direction 65 and in an oppositely oriented direction of movement from the connection device 63 is solvable.
  • the connection device 63 With the help of the connection device 63, the second accumulator 17 can be detachably connected to the protective device 75 and thus connected to the machine tool 1 both mechanically and electrically. Due to the releasable connection of the first accumulator 15, 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 is oriented perpendicular to the longitudinal direction 9 and to the transverse direction 31 in a front direction 95. In alternative embodiments, it can basically be oriented in any direction and, for example, extend in the transverse direction 31. In addition, the insertion direction 65 can have an angle relative to the front direction 95, the transverse direction 31 and/or the longitudinal direction 9.
  • the protective device 75 has a recess 91, which enables the first battery 15 to be arranged in the insertion direction 65 on the first battery interface device 19.
  • the recess can also be provided at other positions, so that an arrangement of the battery on the first battery interface device with basically almost any oriented insertion directions 65 is possible.
  • the protective device 75 In a mounted state of the first protective device 75, the protective device 75 forms a kind of cage with an interior 93.
  • the protective device 75 is designed in the present case in such a way that the accumulator 17 can be arranged completely in the interior 93 defined by the protective device 75.
  • the protective device 75 can basically be made in one piece or in several parts. It can be provided that the battery is not completely arranged in the interior when connected to the battery interface device, but rather protrudes at least partially from the interior.
  • the protective device 75 is preferably also designed in such a way that if the machine tool 1 falls or falls in a fundamentally arbitrary direction, the protective device 75 comes into contact with a flat surface 97 in front of an accumulator 15 connected to the battery interface device 19, so that the accumulator 15 is protected to the desired extent by the protective device 75.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
EP22189232.6A 2022-08-08 2022-08-08 Dispositif d'amortissement des chocs pour un accumulateur Pending EP4321302A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22189232.6A EP4321302A1 (fr) 2022-08-08 2022-08-08 Dispositif d'amortissement des chocs pour un accumulateur
PCT/EP2023/070571 WO2024033076A1 (fr) 2022-08-08 2023-07-25 Unité d'absorption de chocs pour une batterie de stockage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22189232.6A EP4321302A1 (fr) 2022-08-08 2022-08-08 Dispositif d'amortissement des chocs pour un accumulateur

Publications (1)

Publication Number Publication Date
EP4321302A1 true EP4321302A1 (fr) 2024-02-14

Family

ID=82850337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22189232.6A Pending EP4321302A1 (fr) 2022-08-08 2022-08-08 Dispositif d'amortissement des chocs pour un accumulateur

Country Status (2)

Country Link
EP (1) EP4321302A1 (fr)
WO (1) WO2024033076A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20200032461A1 (en) * 2018-07-25 2020-01-30 Robel Bahnbaumaschinen Gmbh Nail punching machine for driving in or pulling out rail spikes of a rail track
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
US20210268636A1 (en) * 2018-06-28 2021-09-02 Robert Bosch Gmbh Machine Tool
EP3943251A1 (fr) 2020-07-22 2022-01-26 Hilti Aktiengesellschaft Dispositif d'amortissement des chocs pour un accumulateur

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20210268636A1 (en) * 2018-06-28 2021-09-02 Robert Bosch Gmbh Machine Tool
US20200032461A1 (en) * 2018-07-25 2020-01-30 Robel Bahnbaumaschinen Gmbh Nail punching machine for driving in or pulling out rail spikes of a rail track
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
WO2024033076A1 (fr) 2024-02-15

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