EP3962699B1 - Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil - Google Patents

Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil Download PDF

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Publication number
EP3962699B1
EP3962699B1 EP19818139.8A EP19818139A EP3962699B1 EP 3962699 B1 EP3962699 B1 EP 3962699B1 EP 19818139 A EP19818139 A EP 19818139A EP 3962699 B1 EP3962699 B1 EP 3962699B1
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EP
European Patent Office
Prior art keywords
tool
protective device
protective
handle
damping elements
Prior art date
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Active
Application number
EP19818139.8A
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German (de)
English (en)
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EP3962699A1 (fr
Inventor
Ralf Greitmann
Roland Meuer
Thomas Reichenberger
Michael Heger
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
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Hilti AG
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Publication date
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Publication of EP3962699A1 publication Critical patent/EP3962699A1/fr
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Classifications

    • 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
    • B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • 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
    • 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
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off
    • B24B27/08—Grinders for cutting-off being portable
    • 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

Definitions

  • the present invention relates to a protective device for a battery in a power tool.
  • the tool device can in particular be a hand-held, battery-operated device, such as a power cutter.
  • the tool preferably has main components in a main area, such as motor, gearbox and accumulators, which are effectively protected by the protective device against mechanical damage, for example in the event of a fall.
  • the protective device prevents the transmission of vibrations from the tool to the user.
  • the invention relates to a system comprising a protective device and a tool device.
  • Cutting grinders for cutting discs with a diameter of 300 mm and larger are known in the prior art, which are usually operated with a cable-guided power connection or with an internal combustion engine. For example, power consumption of more than 2.0 kW is common.
  • the combustion engines are mostly two-stroke engines.
  • the disadvantage of these conventional cut-off machines, which are known from the prior art and are operated with a mains connection or an internal combustion engine as an energy source, is that they either have a cable for transmitting the electrical energy, which can pose a safety risk when the cut-off machine is in operation .
  • an internal combustion engine as an energy source, high performance levels can be achieved, such as those required for working with large cutting discs.
  • internal combustion engines have the usual disadvantages, for example that fuel must always be available and carried or that noise and pollutant emissions can occur.
  • Battery-operated cut-off machines have therefore been developed in order to minimize the cabling effort and the associated safety risk or to be able to dispense with the need for internal combustion engines.
  • These battery-operated cut-off machines work with a power consumption of 1.5 kW and cutting discs with a diameter of 230 mm.
  • no convincing concepts for vibration dampening have been presented for these new battery-operated cut-off machines, so that the previously known solutions essentially eliminate the vibrations that occur when the cut-off machine is in operation be transmitted to the user undamped. It is known that such undamped transmission of vibrations can damage the user's joints in particular.
  • known cordless power cutters have no vibration damping, so that there is no reduction in the impact of vibration on the user.
  • cordless power cutters are significantly heavier, i.e. have a higher weight, compared to known mains or gasoline devices.
  • energy supply based on accumulators requires the provision of an increased installation space for the accumulators, so that the devices are cumbersome and difficult to operate. This is particularly unpleasant for long-term use.
  • WO 2007 069 946 A1 discloses a power-driven, portable, hand-held work machine with a handle assembly including a front handle and a handle body, a machine body being suspended in the handle assembly via a number of anti-vibration members.
  • the US 6,112,831 A describes a breaking machine with an outer handle frame that can be grasped by hand all around and can be designed as a one-piece, pressure-resistant curved tube.
  • the US 2016 271 782 A1 discloses a protective cover for a power tool with a shock absorbing shoe. A cuff of the shoe is designed to cover the areas of the powered tool that are susceptible to damage.
  • the object of the present invention to overcome the above-described disadvantages of battery-operated tool devices, such as cut-off machines, and to provide a protective device for tool devices, in particular hand-held, battery-operated cut-off machines, with which a transmission of vibrations of the tool device to the user can be prevented, in order to protect the user's joints in particular and to avoid long-term impairments for the user.
  • a protective device for tool devices in particular hand-held, battery-operated cut-off machines, with which a transmission of vibrations of the tool device to the user can be prevented, in order to protect the user's joints in particular and to avoid long-term impairments for the user.
  • the robustness of the tool could be increased with the protective device to be provided in order to avoid mechanical damage to the tool, for example in the event of a fall.
  • the invention is intended to enable the construction of the tool device to be as weight-optimized as possible in order to be able to construct a handy, compact and lightest possible device that can be used comfortably even during long-term
  • the present invention relates to a protective device for a battery in a power tool, wherein the tool includes a motor, a gearbox and at least one battery as main components.
  • the protective device is characterized in that it is designed as a protective frame, wherein the tool device can be introduced into the protective device in such a way that the protective device surrounds the tool device, a connection between the tool device and the protective device being able to be established by a number of contact points, at which Damping elements are provided at contact points between the tool and the protective device.
  • the tool device can be inserted into the protective device in such a way that the protective device advantageously envelops the main components of the tool device and effectively protects them from external, mechanical influences, such as falls or impacts.
  • a connection between the tool and the protective device can be established by providing contact points, with damping elements arranged at these points of contact between the tool and the protective device.
  • the damping elements preferably ensure vibration-related decoupling of the tool and the protective device.
  • the damping elements are designed to decouple the tool and the protective device from a vibration point of view.
  • the protection device refers to the tool device
  • the protection device is not characterized by features of the tool device, but is particularly suitable for use with a tool device.
  • the features of the protective device are therefore not particularly unclear to the person skilled in the art.
  • the person skilled in the art knows, for example, what the rear area of a preferably battery-operated tool is like and what dimensions the rear area of such a tool can have. He will therefore understand the feature according to which the protective device is designed so that it can accommodate the rear part of a tool in the manner shown, for example, in the figures.
  • the proposed protective device comprises a frame-like device, which is preferably formed from the two handles and the protective frame.
  • the mentioned components of the frame-like device preferably enclose a hollow interior which is designed to accommodate the rear part of a tool device.
  • the main components of the tool device In this back one Part of the tool device are preferably arranged the main components of the tool device, which can thus be surrounded by the frame-like device and protected by it.
  • the rear area of the tool device is preferably also referred to as the main area of the tool device.
  • the proposed protective device enables a surprisingly light and at the same time robust construction of the tool device, as well as low-vibration work with a tool device that is connected to a proposed protective device.
  • the present invention relates in particular to a protective device for a battery-operated tool, preferably a protective device for a battery-operated cut-off grinder for cutting discs with a diameter of 300 mm or larger.
  • the proposed protective device preferably includes a number of damping elements.
  • the provision of the damping elements advantageously means that the tool and the protective device can be decoupled from one another in terms of vibration. This advantageously prevents oscillations and vibrations of the tool from being transmitted to the protective device, in particular the handles. Since the tool device is preferably held or guided during use on components of the protective device, such as the handles, the user of the tool device is effectively protected from the vibrations by the proposed protective device, because with the proposed invention it can be prevented that the Vibrations emanating from the tool are transmitted to the user or his joints.
  • the invention thus reduces the vibration load for the user of the tool, and on the other hand, the proposed protective device effectively protects the tool from damage, for example in the event of a fall or if objects fall onto the device.
  • the robustness of the tool is significantly increased.
  • the protective device By providing the protective device, the protective effort that must be carried out on the tool device itself can advantageously be reduced. This makes it possible to provide a particularly light, compact and handy tool with which the user can work comfortably for a long time without discomfort or complications.
  • springs, rubber dampers or combined elements can be used as damping elements.
  • the damping elements used are suitable for reducing vibration stress for the user.
  • the protective device comprises a first handle and a second handle, as well as damping elements.
  • the protective device is designed to protect the main components of the tool from the first and second handles to decouple vibration technology.
  • the first handle and the second handle are preferably designed as holding or hand grips, so that the user can hold and/or guide the tool with the handles.
  • the tool essentially comprises two areas.
  • the work equipment can be provided in a front area of the tool. This can be, for example, a cutting wheel if the tool is a cut-off grinder.
  • the tool can include, in addition to the main components, a working tool, which preferably represents a cutting wheel for a cut-off machine.
  • the work equipment is preferably protected with a blade guard to prevent chips or particles from being thrown from the work equipment towards the user.
  • the main components can be provided in a rear area of the tool.
  • this area is preferably also referred to as the main area of the tool device.
  • the proposed protective device preferably surrounds in particular this rear area of the tool.
  • the rear region of the tool device has a substantially cuboid, three-dimensional shape. In a lower area of this cuboid, for example, two batteries can be provided, which serve as an energy source for the tool.
  • the gearbox and the motor of the tool device can be arranged above this.
  • the mass of the tool is decoupled from the handles of the protective device.
  • the position of the center of gravity within the tool device can advantageously be optimized so that the center of gravity lies essentially centrally within the device. This makes operating and guiding the tool much easier for the user.
  • the mass of the tool device is decoupled from the handles of the protective device preferably using the damping elements that are present at the points of contact between the protective device and the tool device.
  • the decoupling of the device mass from the handles is achieved in that in particular the main components of the tool are decoupled from the handles.
  • the protective device for protecting the accumulators or the tool device includes a protective frame, which preferably forms a solid unit with the handles. It is in the spirit of Invention particularly preferred that the frame with the first and the second handle forms a preferably circumferential rigid unit as a protective device, which can be decoupled from the tool device in terms of vibration technology.
  • the protective device preferably has several damping elements.
  • the protective device comprises two to ten damping elements and particularly preferably three to five damping elements.
  • the damping elements can be used individually or in pairs. If five damping elements are provided, for example, three decoupling areas can be formed between the protective device and the tool.
  • two damping elements can form a first decoupling region, which is preferably arranged in the transition region between the first handle and the tool.
  • damping elements establish a connection between the protective device or first handle and the tool device, the damping elements being designed to decouple the protective device and the tool device from one another in such a way that compared to conventional devices and protective devices, significantly less vibration from the tool device transmitted to the protective device and to the user via the handles.
  • vibration or oscillation decoupling of the protective device and tool device Such a reduction in the transmission of vibrations or oscillations is referred to in the sense of the invention as vibration or oscillation decoupling of the protective device and tool device.
  • the damping elements form decoupling regions, the decoupling regions each comprising one damping element or two damping elements.
  • a second decoupling area can preferably be present in a connection area between the protective device and an underside of the main area of the tool device.
  • the second decoupling region comprises one or two damping elements, which preferably bring about vibration decoupling between the preferably solid or compact main region of the tool and the protective device.
  • a third decoupling area may be present in a rear area of the main area of the tool device. In a particularly preferred embodiment, it comprises a damping element, wherein the damping element in particular connects the first handle and the protective frame to the tool or decouples them from one another in terms of vibration.
  • the tool is a hand-held, battery-operated tool, which can in particular be a cut-off machine.
  • tool device is used in the context of the present invention In particular, those tool devices are summarized that drive a disk-shaped machining tool around an axis of rotation while machining a workpiece.
  • Typical examples of such tool equipment are a cut-off grinder, an angle grinder and a circular saw.
  • the proposed cut-off grinder is preferably set up to work with cutting discs as work equipment that have a diameter of 300 mm or larger.
  • Battery operation can be ensured in particular by providing at least one accumulator, which is used within the tool as a rechargeable energy source.
  • the at least one accumulator is preferably also referred to as a “rechargeable battery”.
  • the present invention advantageously provides vibration damping for a hand-held, battery-operated cut-off machine, in which in particular the main components of the tool, such as the motor, gearbox, battery and the working equipment, for example a cutting wheel, are decoupled from the handles of the protective device in terms of vibration technology.
  • the present invention particularly effectively prevents unwanted oscillations, vibrations and oscillations from being transmitted from the main components of the tool to the handles and thus to the user of the tool.
  • the vibrations that occur during operation of the tool occur on these main components.
  • the handles of the proposed protective device preferably represent handles with which a user can pick up and operate the tool.
  • the protective device comprises a first handle and a second handle, wherein the first handle can preferably also be referred to as the rear handle and the second handle as the front handle of the tool.
  • the front handle may represent a frame having a substantially elliptical or rectangular opening.
  • the handles comprise plastic for weight reasons.
  • the handles can also be preferred that the handles are made entirely or partially from plastic.
  • the circumferential front handle of the protective device is essentially completely or partially hollow.
  • the front circumferential handle can include one or more cavities inside.
  • the rear handle of the proposed protective device preferably contains a switching device with which the tool device can be switched on or off, for example. It It is preferred in the sense of the invention that the rear handle comprises, for example, two parts, wherein the two individual parts of the rear handle can in particular be designed to correspond to one another.
  • the rear handle can be designed in two parts and/or constructed in a shell design. It has surprisingly been shown that the handles of the protective device can be made particularly light thanks to the invention, so that overall a tool device with a surprisingly small amount of damage can be provided.
  • the front handle is guided around a housing of the tool, so that this second handle of the protective device effectively protects the housing and the internal components of the tool, which are arranged inside the housing.
  • the second handle is essentially annular, the annular structure of the second handle being designed to enclose a transition area between a front area and a rear area of the tool device.
  • the internal components are therefore protected not only by the provision of the housing, but also by the preferably frame-shaped second handle of the protective device.
  • the housing of the tool device can advantageously be made lighter or with a lower weight, which advantageously further reduces the overall weight of the tool device to be provided.
  • the second handle can be connected to the protective frame of the protective device in an inner lower region.
  • the spatial direction "down” is not an unclear term for the person skilled in the art in the sense of the invention, since it means the area under the tool or the lower area of the tool or the protective device.
  • the lower region of the tool faces the ground or the ground.
  • the tool device preferably also has a top side that is opposite the bottom of the tool device and faces the user when the device is in use.
  • the rear side of the tool device also faces the user when he is using the device, while the working equipment of the tool device is attached to the side of the tool device that faces away from the user when the device is being operated.
  • the protective frame has a double-L-shaped structure which is designed to surround an underside of the tool.
  • the double-L-shaped structure can be part of a U-profile, which can in particular be stiffened.
  • the protective frame preferably has an L-shape in side view, with the longer side of the letter "L" representing the underside of the protective frame or protective device.
  • the protective frame preferably comprises two L-shaped side parts, which are each connected to a connecting part in an upper, rear area and a front, lower area. These connecting parts are preferably also referred to as connecting sections.
  • the connecting parts are each designed essentially orthogonally to the respective sides of the letter "L", which together form the preferably L-shaped side parts of the protective frame.
  • the connecting section that connects the side parts to each other in the rear region of the protective frame can be referred to as the upper, rear connecting section
  • the connecting section that is arranged in the connecting region between the front handle and the protective frame can be referred to as the front, lower connecting section.
  • the protective frame thus comprises two preferably L-shaped side parts, which are connected to one another with two connecting sections.
  • the shorter side of the letter “L” preferably forms the back or rear side of the protective frame.
  • the protective frame is preferably connected to the second handle of the protective device, the second handle and the lower area of the protective frame preferably being arranged essentially orthogonally, i.e. perpendicular to one another.
  • the second handle and the shorter side of the preferably L-shaped protective frame are preferably designed essentially parallel to one another.
  • the protective frame is preferably connected to the first handle of the protective device.
  • the first handle is preferably formed by a bracket which connects the rear area of the protective frame to the housing of the tool.
  • the handles of the protective device together with the protective frame form a stable, external skeleton, which can preferably also be referred to as an exoskeleton for the tool.
  • the exoskeleton can be designed to accommodate the internal tool device via the damping elements.
  • the rear handle of the proposed protective device can be designed in a rear area such that the rear handle grips the upper, rear connecting section of the protective frame in a hook shape.
  • a connection or attachment can be formed between the protective frame and the rear handle in this area of the protective device.
  • a damping element is provided in this connection region between the protective device and the tool, this damping element preferably forming the third decoupling region of the invention.
  • the tool device can be carried with the preferably bow-shaped rear handle if the device is to be transported from one location to another location.
  • the upper area of the front handle can also be used.
  • the first handle comprises operating elements for operating the tool device.
  • operating elements for operating or controlling the tool device can also be provided in the rear handle of the protective device.
  • the first handle, the second handle and the protective frame together form a frame-shaped device which surrounds the compact, rear area of the tool device.
  • the protective device is a frame-shaped device with which the tool device can be surrounded in order to protect it.
  • the tool device is preferably arranged in the open interior area of the protective device.
  • the components of the protective device are each at a distance from the rear area of the tool device to be protected.
  • the protective device only has a few points of contact with the tool device, so that a transfer of oscillations and vibrations from the tool device to the protective device can only take place at these few points of contact.
  • the protective device has damping elements at these points of contact with the tool, which particularly effectively prevent the transmission of vibrations and oscillations, which arise, for example, when the tool is in operation, to the protective device.
  • the tool device can be attached to the protective device at, for example, three to five points, although more or fewer points of contact can also be provided.
  • the tool device is preferably fastened in the protective device with damping elements in the points of contact between the components of the protective device and the tool device.
  • the protective frame can be attached to an underside of the tool with one or two damping elements.
  • the tool device can be on the top, for example can be attached with two further damping elements to the rear handle, which is preferably designed as a bow-shaped holder.
  • a further damping element can be provided in the connection area between the protective frame and the rear handle of the protective device.
  • the protective device includes stop dampers to increase the robustness of the tool.
  • the stop dampers can comprise an elastic material or be formed entirely or partially from it.
  • the stop dampers are made of rubber. They can be accommodated in particular on defined, robust contact points between the tool and the protective device.
  • the stop dampers can, for example, be accommodated either in the protective device or in the tool. It can be advantageous to install these near the damping elements.
  • the invention in a second aspect, relates to a system comprising a protective device and a tool device, the tool device comprising a motor, a transmission and at least one accumulator as main components.
  • the system is characterized in that the tool device can be introduced into the protective device in such a way that the protective device surrounds the tool device, a connection between the tool device and the protective device being able to be established by a number of contact points, damping elements being provided at these contact points between the tool device and the protective device are.
  • the definitions, technical effects and advantages mentioned for the protective device apply analogously to the system.
  • Figure 1 shows some components of a preferred embodiment of the proposed protective device (1).
  • the first handle (3) which is also preferably referred to as the rear handle in the sense of the invention.
  • the first handle (3) forms a top side of the protective device (1), with which the tool device (2), which is in the Figures 5 and 6 shown can be worn.
  • the tool (2) can be carried with the second handle (4) of the protective device (1), which is preferably also referred to as the front handle of the protective device (1).
  • the handles (3, 4) form a frame-shaped device which can surround the rear part (13) of a tool (2) when the tool (2) and the protective device (1) are connected to one another.
  • the frame-shaped device defines an interior into which the rear part (13) of the tool (2) can be inserted.
  • the larger portion of the frame-shaped device is at a distance from the tool device (2), so that contact between the tool device (2) and the protective device (1) only occurs in a few places.
  • Damping elements (6) are provided at these contact points (7), which are preferably designed to establish a connection between the tool (2) and the protective device (1).
  • the damping elements (6) cause a decoupling between the tool (2) and the handles (3, 4) and the protective frame (5) of the protective device (1). This decoupling ensures in particular that only a few vibrations are transmitted from the tool device (2) to a user.
  • the user When carrying out work, the user preferably grips the tool (2) by the handles (3, 4) of the protective device (1), so that a vibration-related decoupling between the tool (2) and the handles (3, 4) of the protective device ( 1) effectively prevents the user's joints in particular from being damaged by vibrations during long-term use of the tool (2).
  • the protective device (1) ensures effective protection of the tool (2), for example in the event of falls or other mechanical damage.
  • the frame-shaped structure surrounds in particular the rear part (13) of the tool device (2), the main components (9, 10, 11) of the tool device (2) being present in particular in the rear area (13) of the tool device (2). These are in particular the motor (9), the gearbox (10) and the at least one accumulator (11) of the tool (2).
  • the tool (2) is preferably a battery-operated cut-off machine, which is operated in particular with cutting discs that have a diameter of 300 mm or larger.
  • the invention enables a functional division of the individual components of the protective device (1) and the tool (2), so that the system components, such as accumulator (11), motor (9), gearbox (10), cutting disk (14), damping elements (6) and/or handles (3, 4) can be optimized for their respective task.
  • a further advantage of the invention is that by providing a functional unit (13) of the tool (2) with the main components (9, 10, 11) on the one hand and the provision of the preferably decoupled protective device (1) with integrated handles (3, 4) on the other hand, easy assembly of the proposed system can be made possible.
  • the double L-shaped structure of the protective frame (5) can be seen in particular.
  • This structure means that the protective frame (5) is designed to surround an underside of the tool device (2) or to accommodate the main components (9, 10, 11) of the tool device (2).
  • the longer side of the preferably L-shaped protective frame (5) forms the underside of the protective device (1), while the shorter side of the protective frame (5) forms the back or rear thereof.
  • Figure 2 shows how the components (3, 4, 5, 6) of the protective device (1) can be assembled to form a preferred embodiment of the protective device (1).
  • the protective frame (5) can be connected to the handles (3, 4), so that the frame-shaped device is formed with the interior to accommodate the rear area (13) of the tool (2).
  • Damping elements (6) and their possible arrangement in the frame-shaped structure are shown.
  • the damping elements (6) are preferably located at points in the frame-shaped structure where the protective device (1) comes into contact with the tool (2). For the purposes of the invention, these points are preferably referred to as contact points (7).
  • the damping elements (6) or the contact points (7) preferably form decoupling areas (8) at which the vibration-related decoupling between the protective device (1) and the tool (2) takes place.
  • the parts of the figures 2a and 2b show different views of a preferred embodiment of the proposed protective device (1), the ones in the Figures 2a and 2b Damping elements (6) shown are formed in particular from an elastic material. These damping elements (6) can preferably include rubber in particular.
  • Figure 3 shows a preferred embodiment of the protective device (1), which includes springs as damping elements (6).
  • the springs can be designed, for example, as cylinder compression springs.
  • Figure parts 3a and 3b show different views of a preferred embodiment of the proposed protective device (1).
  • Figure 4 shows a preferred embodiment of the protective device (1) with stop dampers (15).
  • the stop dampers (15) can be arranged, for example, in a transition area between the rear handle (3) and the protective frame (5).
  • the stop dampers (15) can also be arranged in a transition area between the front handle (4) and the protective frame (5).
  • Figure 5 shows a preferred embodiment of the proposed system consisting of a protective device (1) and a tool (2).
  • the protective device (1) preferably accommodates the rear part (13) of the tool (2) with the main components, such as the motor (9), gearbox (10) and accumulators (11).
  • the accumulators (11) of the tool device (2) are shown in the removed state.
  • the tool device (2) shown has, for example, two accumulators (11). However, only one accumulator (11) or more than two accumulators (11) can also be provided in the tool (2).
  • the tool (2) also has a front area (12).
  • a working means (14) can be provided, which, if the tool (2) is a cut-off machine, is preferably a cutting wheel.
  • the diameter of the cutting disk (14) can be 300 mm or more in the case of the present invention.
  • the cutting disc (14) is in Figure 5 not shown, but a blade guard, which usually prevents particles from flying from the cutting disk (14) towards the user of the tool (2).
  • a first decoupling region (8a) can be present in the transition region between the first handle (3) and the tool (2).
  • This first decoupling region (8a) can preferably comprise two damping elements (6).
  • a second decoupling area (8b) is preferably in a transition area between the protective frame (5) and the second handle (4) of the protective device (1), preferably on the underside of the frame-shaped device.
  • the second decoupling region (8b) preferably also comprises two damping elements (6).
  • the third decoupling region (8c) preferably comprises a damping element (6) and is preferably present in a transition region between the first handle (3) and the upper part of the protective frame (5).
  • Fig. 7 shows a preferred embodiment of the protective device (1) with specifically designated damping elements (6).
  • Individual damping elements (6a, 6b) can be arranged in particular transversely to a working direction of the tool (2).
  • An upper damping element (6b) is preferably arranged above a center of gravity of the tool device (2), while a lower damping element (6a) is preferably arranged below a center of gravity of the tool device (2).
  • This preferred arrangement of the damping elements (6a and 6b) allows the tool device (2) to be designed to be particularly stable.
  • the damping element (6c) is preferably arranged in a rear area of the tool (2), in particular in the center of the protective device (1).
  • the damping element (6c) is preferably arranged in a working direction of the tool (2), whereby particularly good vibration damping in the working direction can be achieved.
  • the tool device (2) has at least one accumulator (11) for supplying the tool device (2) with electrical energy.
  • the protective device (1) can preferably also be referred to as a device (1) for protecting a battery (11) in a tool device (2).
  • the protective device (1) can encompass the tool device (2) to protect the battery (11) and can be located on the outside of the tool device (2).
  • the tool (2) can include further damping elements, which can include an elastic material, preferably rubber. These additional damping elements on the tool (2) are preferably designed to additionally protect the protective device (1) and/or the tool (2) or its battery (11) in the event of a fall.
  • the protective device (1) essentially comprises three components, in particular the first handle (3), the second handle (4) and the protective frame (5). These components (3, 4, 5) are preferably connected to one another in such a way that they come into contact with one another in three areas and form so-called decoupling areas (8a, 8b, 8c).
  • the components (3, 4, 5) of the protective device (1) in particular form a stable unit to protect the accumulator (11) of the tool (2).
  • the motor (9) of the tool (2) can be, in particular, an electric motor, which is supplied with electrical energy by the at least one battery (11) of the tool (2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Portable Power Tools In General (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Vibration Prevention Devices (AREA)

Claims (9)

  1. Dispositif de protection (1) pour protéger un accumulateur (11) dans un outil (2), l'outil (2) comprenant un moteur (9), une transmission (10) et au moins un accumulateur (11) en tant que composants principaux,
    caractérisé en ce que
    le dispositif de protection (1) est réalisé sous forme de cadre de protection (5), l'outil (2) pouvant être introduit dans le dispositif de protection (1) de telle sorte que le dispositif de protection (1) entoure l'outil (2), une liaison entre l'outil (2) et le dispositif de protection (1) pouvant être établie par un nombre de points de contact (7), des éléments d'amortissement (6) étant prévus au niveau de ces points de contact (7) entre l'outil (2) et le dispositif de protection (1).
  2. Dispositif de protection (1) selon la revendication 1,
    caractérisé en ce que
    le dispositif de protection (1) comprend deux à dix éléments d'amortissement (6) et de manière particulièrement préférée trois à cinq éléments d'amortissement (6).
  3. Dispositif de protection (1) selon la revendication 1 ou 2,
    caractérisé en ce que
    les éléments d'amortissement (6) forment des zones de découplage (8), les zones de découplage (8) comprenant chacune un élément d'amortissement (6) ou deux éléments d'amortissement (6).
  4. Dispositif de protection (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que
    le dispositif de protection (1) comprend une première poignée (3) et une deuxième poignée (3), ainsi que des éléments d'amortissement (6).
  5. Dispositif de protection (1) selon la revendication 1 ou 4,
    caractérisé en ce que
    le cadre de protection (5) présente une structure en forme de double L, adaptée pour entourer un côté inférieur de l'outil (2).
  6. Dispositif de protection (1) selon la revendication 1, 4 ou 5,
    caractérisé en ce que
    la première poignée (3) comprend des éléments de commande pour commander l'outil.
  7. Dispositif de protection (1) selon l'une quelconque des revendications 4 à 6,
    caractérisé en ce que
    la deuxième poignée (4) est réalisée sous forme essentiellement annulaire, la structure annulaire de la deuxième poignée (4) étant adaptée pour entourer une zone de transition entre une zone avant (12) et une zone arrière (13) de l'outil (2).
  8. Dispositif de protection (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le dispositif de protection (1) comprend des amortisseurs de butée (15).
  9. Système comprenant un dispositif de protection (1) selon l'une quelconque des revendications précédentes et un outil (2), l'outil (2) comprenant un moteur (9), une transmission (10) et au moins un accumulateur (11) en tant que composants principaux,
    caractérisé en ce que
    le dispositif de protection (1) est réalisé sous forme de cadre de protection (5), l'outil (2) pouvant être introduit dans le dispositif de protection (1) de telle sorte que le dispositif de protection (1) entoure les composants principaux (9, 10, 11) de l'outil (2), une liaison entre l'outil (2) et le dispositif de protection (1) pouvant être établie par un nombre de points de contact (7), des éléments d'amortissement (5) étant prévus au niveau de ces points de contact (7) entre l'outil (2) et le dispositif de protection (1).
EP19818139.8A 2019-04-29 2019-12-17 Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil Active EP3962699B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19171534.1A EP3733352A1 (fr) 2019-04-29 2019-04-29 Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil
PCT/EP2019/085668 WO2020221471A1 (fr) 2019-04-29 2019-12-17 Dispositif de protection destiné à une machine-outil, ainsi que système comprenant un dispositif de protection et une machine-outil

Publications (2)

Publication Number Publication Date
EP3962699A1 EP3962699A1 (fr) 2022-03-09
EP3962699B1 true EP3962699B1 (fr) 2024-03-13

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EP19171534.1A Withdrawn EP3733352A1 (fr) 2019-04-29 2019-04-29 Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil
EP19818139.8A Active EP3962699B1 (fr) 2019-04-29 2019-12-17 Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil

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EP19171534.1A Withdrawn EP3733352A1 (fr) 2019-04-29 2019-04-29 Dispositif de protection pour un appareil-outil ainsi que système comprenant un dispositif de protection et un appareil-outil

Country Status (4)

Country Link
US (1) US20220176511A1 (fr)
EP (2) EP3733352A1 (fr)
CN (1) CN113613845A (fr)
WO (1) WO2020221471A1 (fr)

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EP4008491A1 (fr) * 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal
EP4008478A1 (fr) * 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil doté d'un premier et d'un second accumulateur
EP4008477A1 (fr) * 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil pourvu de refroidissement à air et procédé de refroidissement des composants d'une machine-outil
CA3156645A1 (fr) * 2021-04-28 2022-10-28 Gripguard Inc. Dispositif de protection contre les chutes d'outil electrique
CN115592622A (zh) * 2021-07-08 2023-01-13 南京泉峰科技有限公司（Cn） 电动工具
EP4289562A1 (fr) * 2022-06-07 2023-12-13 Hilti Aktiengesellschaft Machine-outil pourvue d'axes parallèles de sortie ou du moteur

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DE10260466B4 (de) * 2002-12-21 2014-07-03 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät
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Also Published As

Publication number Publication date
EP3733352A1 (fr) 2020-11-04
US20220176511A1 (en) 2022-06-09
WO2020221471A1 (fr) 2020-11-05
CN113613845A (zh) 2021-11-05
EP3962699A1 (fr) 2022-03-09

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